Merge branch 'master' into docking

# Conflicts:
#	imgui.cpp

.github/ISSUE_TEMPLATE/issue_template.yml

@@ -4,11 +4,11 @@ body:
   - type: markdown
     attributes:
       value: |
-        FOR FIRST-TIME USERS ISSUES COMPILING/LINKING/RUNNING, please use [GitHub Discussions](https://github.com/ocornut/imgui/discussions)
+        FOR FIRST-TIME USERS ISSUES COMPILING/LINKING/RUNNING or LOADING FONTS, please use [GitHub Discussions](https://github.com/ocornut/imgui/discussions)
         For anything else: **we are happy to use 'GitHub Issues' for many types of open-ended questions**. We are encouraging 'Issues' becoming a large, centralized, tagged, cross-referenced database of Dear ImGui contents.
 
         Be mindful that messages are being sent to the e-mail box of "Watching" users. Try to proof-read your messages before sending them. Edits are not seen by those users.
-
+        
         **If you are using Dear ImGui as part of a job that you are being well-paid for** and your company is not a sponsor. Please be mindful that this is a Free Software and you might be about to ask volunteers to help you doing your job. Please put extra effort describing your issue or question properly. If your company is wealthy, please read [Funding](https://github.com/ocornut/imgui/wiki/Funding) and consider getting in touch.
   - type: markdown
     attributes:

.github/pull_request_template.md

@@ -2,9 +2,5 @@
 
 1. PLEASE CAREFULLY READ: [Contributing Guidelines](https://github.com/ocornut/imgui/blob/master/docs/CONTRIBUTING.md)
 
-2. **Make sure you're using a special branch just for this pull request**. (In git, 1 PR = 1 branch. If you update the branch the PR will be updated.)
-
-3. Consider running the [imgui_test_suite](https://github.com/ocornut/imgui_test_engine) or adding new tests to test for expected behaviors.
-
-4. Clear this template before submitting your PR.
+2. Clear this template before submitting your PR.
 

.github/workflows/build.yml

@@ -16,46 +16,32 @@ on:
       - requested
 
 jobs:
-  Build-Windows:
-    runs-on: windows-2025
-    name: Build - Windows
-
-    defaults:
-      run:
-        working-directory: ${{ github.workspace }}/imgui
-
+  Windows:
+    runs-on: windows-2019
     env:
-      VS_PATH: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\
-      MSBUILD_PATH: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\
+      VS_PATH: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\
+      MSBUILD_PATH: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin\
     steps:
-      - uses: actions/checkout@v6
-        with:
-          path: ${{ github.workspace }}/imgui
+      - uses: actions/checkout@v4
 
-      # The VulkanSDK libs for Windows is manually generated using build_windows_vulkan_libs.ps1 + attached to issue #8925.
-      # (we have a .yml workflow in commit history if it becomes ever useful to create this on CI too)
       - name: Install Dependencies
         shell: powershell
         run: |
-          Invoke-WebRequest -Uri "https://www.libsdl.org/release/SDL2-devel-2.32.8-VC.zip" -OutFile "SDL2-devel-2.32.8-VC.zip"
-          Expand-Archive -Path SDL2-devel-2.32.8-VC.zip
-          echo "SDL2_DIR=$(pwd)\SDL2-devel-2.32.8-VC\SDL2-2.32.8\" >>${env:GITHUB_ENV}
+          Invoke-WebRequest -Uri "https://www.libsdl.org/release/SDL2-devel-2.26.3-VC.zip" -OutFile "SDL2-devel-2.26.3-VC.zip"
+          Expand-Archive -Path SDL2-devel-2.26.3-VC.zip
+          echo "SDL2_DIR=$(pwd)\SDL2-devel-2.26.3-VC\SDL2-2.26.3\" >>${env:GITHUB_ENV}
 
-          Invoke-WebRequest -Uri "https://www.libsdl.org/release/SDL3-devel-3.2.18-VC.zip" -OutFile "SDL3-devel-3.2.18-VC.zip"
-          Expand-Archive -Path SDL3-devel-3.2.18-VC.zip
-          echo "SDL3_DIR=$(pwd)\SDL3-devel-3.2.18-VC\SDL3-3.2.18\" >>${env:GITHUB_ENV}
-
-          Invoke-WebRequest -Uri "https://github.com/user-attachments/files/22464296/vulkan_windows_libs_1.4.326.zip" -OutFile vulkan_windows_libs_1.4.326.zip
-          Expand-Archive -Path vulkan_windows_libs_1.4.326.zip
-          echo "VULKAN_SDK=$(pwd)\vulkan_windows_libs_1.4.326\" >>${env:GITHUB_ENV}
+          Invoke-WebRequest -Uri "https://github.com/ocornut/imgui/files/3789205/vulkan-sdk-1.1.121.2.zip" -OutFile vulkan-sdk-1.1.121.2.zip
+          Expand-Archive -Path vulkan-sdk-1.1.121.2.zip
+          echo "VULKAN_SDK=$(pwd)\vulkan-sdk-1.1.121.2\" >>${env:GITHUB_ENV}
 
       - name: Fix Projects
         shell: powershell
         run: |
           # CI workers do not supporter older Visual Studio versions. Fix projects to target newer available version.
           gci -recurse -filter "*.vcxproj" | ForEach-Object {
-            (Get-Content $_.FullName) -Replace "<PlatformToolset>v\d{3}</PlatformToolset>","<PlatformToolset>v143</PlatformToolset>" | Set-Content -Path $_.FullName
-            (Get-Content $_.FullName) -Replace "<WindowsTargetPlatformVersion>[\d\.]+</WindowsTargetPlatformVersion>",'<WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>' | Set-Content -Path $_.FullName
+            (Get-Content $_.FullName) -Replace "<PlatformToolset>v\d{3}</PlatformToolset>","<PlatformToolset>v142</PlatformToolset>" | Set-Content -Path $_.FullName
+            (Get-Content $_.FullName) -Replace "<WindowsTargetPlatformVersion>[\d\.]+</WindowsTargetPlatformVersion>","<WindowsTargetPlatformVersion>10.0.18362.0</WindowsTargetPlatformVersion>" | Set-Content -Path $_.FullName
           }
 
       # Not using matrix here because it would inflate job count too much. Check out and setup is done for every job and that makes build times way too long.
@@ -65,11 +51,15 @@ jobs:
       - name: Build example_null (mingw 64-bit, as DLL)
         shell: bash
         run: |
-          echo '#define IMGUI_API __declspec(dllexport)'         >  example_single_file.cpp
+          echo '#ifdef _EXPORT'                                  >  example_single_file.cpp
+          echo '#  define IMGUI_API __declspec(dllexport)'       >> example_single_file.cpp
+          echo '#else'                                           >> example_single_file.cpp
+          echo '#  define IMGUI_API __declspec(dllimport)'       >> example_single_file.cpp
+          echo '#endif'                                          >> example_single_file.cpp
           echo '#define IMGUI_IMPLEMENTATION'                    >> example_single_file.cpp
           echo '#include "misc/single_file/imgui_single_file.h"' >> example_single_file.cpp
-          g++ -I. -Wall -Wformat -shared -o libimgui.dll -Wl,--out-implib,libimgui.a example_single_file.cpp -limm32
-          g++ -I. -Wall -Wformat -DIMGUI_API='__declspec(dllimport)' -DIMGUI_IMPL_API= -o example_null.exe examples/example_null/main.cpp -L. -limgui
+          g++ -I. -Wall -Wformat -D_EXPORT -shared -o libimgui.dll -Wl,--out-implib,libimgui.a example_single_file.cpp -limm32
+          g++ -I. -Wall -Wformat -o example_null.exe examples/example_null/main.cpp -L. -limgui
           rm -f example_null.exe libimgui.* example_single_file.*
 
       - name: Build example_null (extra warnings, msvc 64-bit)
@@ -109,19 +99,20 @@ jobs:
         run: |
           call "%VS_PATH%\VC\Auxiliary\Build\vcvars64.bat"
 
-          echo #define IMGUI_API __declspec(dllexport)         >  example_single_file.cpp
+          echo #ifdef _EXPORT                                  >  example_single_file.cpp
+          echo #  define IMGUI_API __declspec(dllexport)       >> example_single_file.cpp
+          echo #else                                           >> example_single_file.cpp
+          echo #  define IMGUI_API __declspec(dllimport)       >> example_single_file.cpp
+          echo #endif                                          >> example_single_file.cpp
           echo #define IMGUI_IMPLEMENTATION                    >> example_single_file.cpp
           echo #include "misc/single_file/imgui_single_file.h" >> example_single_file.cpp
 
-          cl.exe /D_USRDLL /D_WINDLL /I. example_single_file.cpp /LD /FeImGui.dll /link
-          cl.exe /DIMGUI_API=__declspec(dllimport) -DIMGUI_IMPL_API= /I. ImGui.lib /Feexample_null.exe examples/example_null/main.cpp
+          cl.exe /D_USRDLL /D_WINDLL /D_EXPORT /I. example_single_file.cpp /LD /FeImGui.dll /link
+          cl.exe /I. ImGui.lib /Feexample_null.exe examples/example_null/main.cpp
 
-      # Win64 examples are more frequently compilted than the Win32 examples.
-      # More of the Win32 examples requires 'workflow_run' to reduce waste.
       - name: Build Win32 example_glfw_opengl2
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_glfw_opengl2/example_glfw_opengl2.vcxproj /p:Platform=Win32 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
 
       - name: Build Win32 example_glfw_opengl3
         shell: cmd
@@ -157,126 +148,79 @@ jobs:
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl2_directx11/example_sdl2_directx11.vcxproj /p:Platform=Win32 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win32 example_sdl3_opengl3
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_opengl3/example_sdl3_opengl3.vcxproj /p:Platform=Win32 /p:Configuration=Release'
-
-      - name: Build Win32 example_sdl3_sdlgpu3
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_sdlgpu3/example_sdl3_sdlgpu3.vcxproj /p:Platform=Win32 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
-
-      - name: Build Win32 example_sdl3_sdlrenderer3
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_sdlrenderer3/example_sdl3_sdlrenderer3.vcxproj /p:Platform=Win32 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
-
-      - name: Build Win32 example_sdl3_vulkan
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_vulkan/example_sdl3_vulkan.vcxproj /p:Platform=Win32 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
-
       - name: Build Win32 example_win32_directx9
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_win32_directx9/example_win32_directx9.vcxproj /p:Platform=Win32 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
 
       - name: Build Win32 example_win32_directx10
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_win32_directx10/example_win32_directx10.vcxproj /p:Platform=Win32 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
 
       - name: Build Win32 example_win32_directx11
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_win32_directx11/example_win32_directx11.vcxproj /p:Platform=Win32 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      # Windows 64-bits
-      - name: Build Win64 example_glfw_opengl2
+      - name: Build x64 example_glfw_opengl2
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_glfw_opengl2/example_glfw_opengl2.vcxproj /p:Platform=x64 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_glfw_opengl3
+      - name: Build x64 example_glfw_opengl3
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_glfw_opengl3/example_glfw_opengl3.vcxproj /p:Platform=x64 /p:Configuration=Release'
 
-      - name: Build Win64 example_glfw_vulkan
+      - name: Build x64 example_glfw_vulkan
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_glfw_vulkan/example_glfw_vulkan.vcxproj /p:Platform=x64 /p:Configuration=Release'
 
-      - name: Build Win64 example_sdl2_sdlrenderer2
+      - name: Build x64 example_sdl2_sdlrenderer2
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl2_sdlrenderer2/example_sdl2_sdlrenderer2.vcxproj /p:Platform=x64 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_sdl2_vulkan
+      - name: Build x64 example_sdl2_vulkan
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl2_vulkan/example_sdl2_vulkan.vcxproj /p:Platform=x64 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_sdl2_opengl2
+      - name: Build x64 example_sdl2_opengl2
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl2_opengl2/example_sdl2_opengl2.vcxproj /p:Platform=x64 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_sdl2_opengl3
+      - name: Build x64 example_sdl2_opengl3
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl2_opengl3/example_sdl2_opengl3.vcxproj /p:Platform=x64 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_sdl2_directx11
+      - name: Build x64 example_sdl2_directx11
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl2_directx11/example_sdl2_directx11.vcxproj /p:Platform=x64 /p:Configuration=Release'
 
-      - name: Build Win64 example_sdl3_opengl3
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_opengl3/example_sdl3_opengl3.vcxproj /p:Platform=x64 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
-
-      - name: Build Win64 example_sdl3_sdlgpu3
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_sdlgpu3/example_sdl3_sdlgpu3.vcxproj /p:Platform=x64 /p:Configuration=Release'
-
-      - name: Build Win64 example_sdl3_sdlrenderer3
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_sdlrenderer3/example_sdl3_sdlrenderer3.vcxproj /p:Platform=x64 /p:Configuration=Release'
-
-      - name: Build Win64 example_sdl3_vulkan
-        shell: cmd
-        run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_sdl3_vulkan/example_sdl3_vulkan.vcxproj /p:Platform=x64 /p:Configuration=Release'
-        if: github.event_name == 'workflow_run'
-
-      - name: Build Win64 example_win32_directx9
+      - name: Build x64 example_win32_directx9
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_win32_directx9/example_win32_directx9.vcxproj /p:Platform=x64 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_win32_directx10
+      - name: Build x64 example_win32_directx10
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_win32_directx10/example_win32_directx10.vcxproj /p:Platform=x64 /p:Configuration=Release'
         if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_win32_directx11
+      - name: Build x64 example_win32_directx11
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_win32_directx11/example_win32_directx11.vcxproj /p:Platform=x64 /p:Configuration=Release'
+        if: github.event_name == 'workflow_run'
 
-      - name: Build Win64 example_win32_directx12
+      - name: Build x64 example_win32_directx12
         shell: cmd
         run: '"%MSBUILD_PATH%\MSBuild.exe" examples/example_win32_directx12/example_win32_directx12.vcxproj /p:Platform=x64 /p:Configuration=Release'
 
-  Build-Linux:
-    runs-on: ubuntu-latest
-    name: Build - Linux
-
-    defaults:
-      run:
-        working-directory: ${{ github.workspace }}/imgui
-
+  Linux:
+    runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v6
-      with:
-        path: ${{ github.workspace }}/imgui
+    - uses: actions/checkout@v4
 
     - name: Install Dependencies
       run: |
@@ -343,7 +287,7 @@ jobs:
         EOF
         g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
-    - name: Build example_null (with large ImDrawIdx + custom ImTextureID)
+    - name: Build example_null (with large ImDrawIdx + pointer ImTextureID)
       run: |
         cat > example_single_file.cpp <<'EOF'
 
@@ -356,21 +300,6 @@ jobs:
         EOF
         g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
-        cat > example_single_file.cpp <<'EOF'
-
-        // Test build ImTextureID defined as a struct
-        struct SomeType { int a = 0; int b = 0; };
-        #define ImTextureID SomeType
-        #define ImTextureID_Invalid SomeType()
-        inline bool operator==(const SomeType& lhs, const SomeType& rhs) { return lhs.a == rhs.a && lhs.b == rhs.b; }
-        inline bool operator!=(const SomeType& lhs, const SomeType& rhs) { return lhs.a != rhs.a || lhs.b != rhs.b; }
-        #define IMGUI_IMPLEMENTATION
-        #include "misc/single_file/imgui_single_file.h"
-        #include "examples/example_null/main.cpp"
-
-        EOF
-        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
-
     - name: Build example_null (with IMGUI_DISABLE_OBSOLETE_FUNCTIONS)
       run: |
         cat > example_single_file.cpp <<'EOF'
@@ -505,27 +434,19 @@ jobs:
     - name: Build with IMGUI_IMPL_VULKAN_NO_PROTOTYPES
       run: g++ -c -I. -std=c++11 -DIMGUI_IMPL_VULKAN_NO_PROTOTYPES=1 backends/imgui_impl_vulkan.cpp
 
-  Build-MacOS:
+  MacOS:
     runs-on: macos-latest
-    name: Build - MacOS
-
-    defaults:
-      run:
-        working-directory: ${{ github.workspace }}/imgui
-
     steps:
-    - uses: actions/checkout@v6
-      with:
-        path: ${{ github.workspace }}/imgui
+    - uses: actions/checkout@v4
 
     - name: Install Dependencies
       run: |
-        brew install glfw3 sdl2 sdl3
+        brew install glfw3 sdl2
 
     - name: Build example_null (extra warnings, clang 64-bit)
       run: make -C examples/example_null WITH_EXTRA_WARNINGS=1
 
-    - name: Build macOS example_null (single file build)
+    - name: Build example_null (single file build)
       run: |
         cat > example_single_file.cpp <<'EOF'
 
@@ -536,7 +457,7 @@ jobs:
         EOF
         clang++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
-    - name: Build macOS example_null (single file build, c++20)
+    - name: Build example_null (single file build, c++20)
       run: |
         cat > example_single_file.cpp <<'EOF'
 
@@ -547,7 +468,7 @@ jobs:
         EOF
         clang++ -I. -std=c++20 -Wall -Wformat -o example_single_file example_single_file.cpp
 
-    - name: Build macOS example_null (without c++ runtime)
+    - name: Build example_null (without c++ runtime)
       run: |
         cat > example_single_file.cpp <<'EOF'
 
@@ -558,57 +479,46 @@ jobs:
         EOF
         clang++ -I. -std=c++11 -Wall -Wformat -nodefaultlibs -fno-rtti -fno-exceptions -fno-threadsafe-statics -lc -lm -o example_single_file example_single_file.cpp
 
-    - name: Build macOS example_glfw_opengl2
+    - name: Build example_glfw_opengl2
       run: make -C examples/example_glfw_opengl2
-      if: github.event_name == 'workflow_run'
 
-    - name: Build macOS example_glfw_opengl3
+    - name: Build example_glfw_opengl3
       run: make -C examples/example_glfw_opengl3
       if: github.event_name == 'workflow_run'
 
-    - name: Build macOS example_glfw_metal
+    - name: Build example_glfw_metal
       run: make -C examples/example_glfw_metal
 
-    - name: Build macOS example_sdl2_metal
+    - name: Build example_sdl2_metal
       run: make -C examples/example_sdl2_metal
 
-    - name: Build macOS example_sdl2_opengl2
+    - name: Build example_sdl2_opengl2
       run: make -C examples/example_sdl2_opengl2
       if: github.event_name == 'workflow_run'
 
-    - name: Build macOS example_sdl2_opengl3
+    - name: Build example_sdl2_opengl3
       run: make -C examples/example_sdl2_opengl3
-      if: github.event_name == 'workflow_run'
 
-    - name: Build macOS example_sdl3_opengl3
-      run: make -C examples/example_sdl3_opengl3
-
-    - name: Build macOS example_apple_metal
+    - name: Build example_apple_metal
       run: xcodebuild -project examples/example_apple_metal/example_apple_metal.xcodeproj -target example_apple_metal_macos
-      if: github.event_name == 'workflow_run'
 
-    - name: Build macOS example_apple_opengl2
+    - name: Build example_apple_opengl2
       run: xcodebuild -project examples/example_apple_opengl2/example_apple_opengl2.xcodeproj -target example_osx_opengl2
-      if: github.event_name == 'workflow_run'
-
-  Build-iOS:
-    runs-on: macos-14
-    name: Build - iOS
 
+  iOS:
+    runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Build example_apple_metal
       run: |
         # Code signing is required, but we disable it because it is irrelevant for CI builds.
         xcodebuild -project examples/example_apple_metal/example_apple_metal.xcodeproj -target example_apple_metal_ios CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO
 
-  Build-Emscripten:
-    runs-on: ubuntu-latest
-    name: Build - Emscripten
-
+  Emscripten:
+    runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Install Dependencies
       run: |
@@ -646,148 +556,12 @@ jobs:
         emcmake cmake -B build -DCMAKE_BUILD_TYPE=Release examples/example_glfw_wgpu
         cmake --build build
 
-  Build-Android:
-    runs-on: ubuntu-latest
-    name: Build - Android
-
+  Android:
+    runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Build example_android_opengl3
       run: |
         cd examples/example_android_opengl3/android
         gradle assembleDebug --stacktrace
-
-  Test-Windows:
-    runs-on: windows-2025
-    name: Test - Windows
-
-    defaults:
-      run:
-        working-directory: ${{ github.workspace }}/imgui
-
-    env:
-      MSBUILD_PATH: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\
-
-    steps:
-      - uses: actions/checkout@v6
-        with:
-          path: ${{ github.workspace }}/imgui
-
-      - uses: actions/checkout@v6
-        continue-on-error: true
-        with:
-          fetch-depth: 1
-          repository: ocornut/imgui_test_engine
-          path: ${{ github.workspace }}/imgui_test_engine
-          submodules: true
-
-      - name: Fix Tests Projects
-        shell: powershell
-        working-directory: ${{ github.workspace }}/imgui_test_engine
-        run: |
-          # WARNING: This will need updating if toolset/sdk change in project files!
-          gci -recurse -filter "*.vcxproj" | ForEach-Object {
-            # Fix SDK and toolset for most samples.
-            (Get-Content $_.FullName) -Replace "<PlatformToolset>v110</PlatformToolset>","<PlatformToolset>v142</PlatformToolset>" | Set-Content -Path $_.FullName
-            (Get-Content $_.FullName) -Replace "<WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>","<WindowsTargetPlatformVersion>10.0.20348.0</WindowsTargetPlatformVersion>" | Set-Content -Path $_.FullName
-            # Fix SDK and toolset for samples that require newer SDK/toolset. At the moment it is only dx12.
-            (Get-Content $_.FullName) -Replace "<PlatformToolset>v140</PlatformToolset>","<PlatformToolset>v142</PlatformToolset>" | Set-Content -Path $_.FullName
-            (Get-Content $_.FullName) -Replace "<WindowsTargetPlatformVersion>10.0.14393.0</WindowsTargetPlatformVersion>","<WindowsTargetPlatformVersion>10.0.20348.0</WindowsTargetPlatformVersion>" | Set-Content -Path $_.FullName
-          }
-
-      - name: Build Tests
-        shell: cmd
-        working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-        run: '"%MSBUILD_PATH%\MSBuild.exe" imgui_test_suite.vcxproj /p:Platform=x64 /p:Configuration=Release /p:ClFlags=/WX -maxcpucount:%NUMBER_OF_PROCESSORS%'
-
-      - name: Run Tests
-        working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-        run: Release/imgui_test_suite.exe -nogui -nopause -v2 -ve4 tests
-
-      - name: Check for Docking
-        id: check_docking
-        shell: bash
-        working-directory: ${{ github.workspace }}/imgui
-        run: echo "has_dock=$(grep -q "#define IMGUI_HAS_DOCK" imgui.h && echo true || echo false)" >> $GITHUB_OUTPUT
-
-      - name: Run Viewport Tests
-        if: steps.check_docking.outputs.has_dock == 'true'
-        working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-        run: Release/imgui_test_suite.exe -nogui -nopause -v2 -ve4 -viewport-mock viewport
-
-  Test-Linux:
-    runs-on: ubuntu-latest
-    name: Test - Linux
-
-    defaults:
-      run:
-        working-directory: ${{ github.workspace }}/imgui
-
-    steps:
-    - uses: actions/checkout@v6
-      with:
-        path: ${{ github.workspace }}/imgui
-
-    - uses: actions/checkout@v6
-      with:
-        fetch-depth: 1
-        repository: ocornut/imgui_test_engine
-        path: ${{ github.workspace }}/imgui_test_engine
-        submodules: true
-
-    - name: Build Tests
-      working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-      run: make -j$(nproc)
-
-    - name: Run Tests
-      working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-      run: ./imgui_test_suite -nogui -nopause -v2 -ve4 tests
-
-    - name: Check for Docking
-      id: check_docking
-      working-directory: ${{ github.workspace }}/imgui
-      run: echo "has_dock=$(grep -q "#define IMGUI_HAS_DOCK" imgui.h && echo true || echo false)" >> $GITHUB_OUTPUT
-
-    - name: Run Viewport Tests
-      if: steps.check_docking.outputs.has_dock == 'true'
-      working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-      run: ./imgui_test_suite -nogui -nopause -v2 -ve4 -viewport-mock viewport
-
-#  Test-MacOS:
-#    runs-on: macos-latest
-#    name: Test - MacOS
-#
-#    defaults:
-#      run:
-#        working-directory: ${{ github.workspace }}/imgui
-#
-#    steps:
-#    - uses: actions/checkout@v6
-#      with:
-#        path: ${{ github.workspace }}/imgui
-#
-#    - uses: actions/checkout@v6
-#      with:
-#        fetch-depth: 1
-#        repository: ocornut/imgui_test_engine
-#        path: ${{ github.workspace }}/imgui_test_engine
-#        submodules: true
-#
-#    - name: Build Tests
-#      working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-#      run: make -j$(nproc)
-#
-#    - name: Run Tests
-#      working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-#      run: ./imgui_test_suite -nogui -nopause -v2 -ve4 tests
-#
-#    - name: Check for Docking
-#      id: check_docking
-#      working-directory: ${{ github.workspace }}/imgui
-#      run: echo "has_dock=$(grep -q "#define IMGUI_HAS_DOCK" imgui.h && echo true || echo false)" >> $GITHUB_OUTPUT
-#
-#    - name: Run Viewport Tests
-#      if: steps.check_docking.outputs.has_dock == 'true'
-#      working-directory: ${{ github.workspace }}/imgui_test_engine/imgui_test_suite
-#      run: ./imgui_test_suite -nogui -nopause -v2 -ve4 -viewport-mock viewport

.github/workflows/build_windows_vulkan_libs.ps1

@@ -1,38 +0,0 @@
-# This is current meant to be run manually, occasionally:
-# - Run then zip the contents of vulkanArtifact/ into e.g. vulkan_windows_libs_1.4.326
-# - Upload as an attachment to https://github.com/ocornut/imgui/pull/8925 then change filename in build.yml
-# - There is a build_windows_vulkan_libs.yml in commit history that we removed thinking this is run so rarely we don't need to pollute CI UI with it.
-
-# Set default vulkan version if none provided
-if (-not $env:VULKAN_TAG) { $env:VULKAN_TAG = "1.4.326" }
-
-# Create output folder
-mkdir vulkanArtifact
-
-# Download Vulkan Headers
-
-Invoke-WebRequest -Uri "https://github.com/KhronosGroup/Vulkan-Headers/archive/refs/tags/v$($env:VULKAN_TAG).zip" -OutFile Vulkan-Headers-$($env:VULKAN_TAG).zip
-Expand-Archive -Path Vulkan-Headers-$($env:VULKAN_TAG).zip
-
-# Copy Vulkan Headers to artifact folder
-
-cp -R Vulkan-Headers-$($env:VULKAN_TAG)\Vulkan-Headers-$($env:VULKAN_TAG)\include vulkanArtifact\Include
-
-# Download Vulkan Loader
-
-Invoke-WebRequest -Uri "https://github.com/KhronosGroup/Vulkan-Loader/archive/refs/tags/v$($env:VULKAN_TAG).zip" -OutFile Vulkan-Loader-$($env:VULKAN_TAG).zip
-Expand-Archive -Path Vulkan-Loader-$($env:VULKAN_TAG).zip
-
-# Build Vulkan Loader x64
-
-cmake -S Vulkan-Loader-$($env:VULKAN_TAG)\Vulkan-Loader-$($env:VULKAN_TAG) -B VulkanLoader-build64 -D UPDATE_DEPS=On -A x64
-cmake --build VulkanLoader-build64
-mkdir vulkanArtifact\Lib
-copy VulkanLoader-build64\loader\Debug\vulkan-1.lib vulkanArtifact\Lib
-
-# Build Vulkan Loader win32
-
-cmake -S Vulkan-Loader-$($env:VULKAN_TAG)\Vulkan-Loader-$($env:VULKAN_TAG) -B VulkanLoader-build32 -D UPDATE_DEPS=On -A Win32
-cmake --build VulkanLoader-build32
-mkdir vulkanArtifact\Lib32
-copy VulkanLoader-build32\loader\Debug\vulkan-1.lib vulkanArtifact\Lib32

.github/workflows/static-analysis.yml

@@ -10,9 +10,9 @@ on:
 
 jobs:
   PVS-Studio:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 1
 

.gitignore

@@ -1,7 +1,5 @@
-## Misc artifacts
+## OSX artifacts
 .DS_Store
-.claude
-.vscode
 
 ## Dear ImGui artifacts
 imgui.ini
@@ -14,7 +12,6 @@ imgui*.ini
 examples/*/Debug/*
 examples/*/Release/*
 examples/*/x64/*
-examples/*.tmp
 
 ## Visual Studio artifacts
 .vs
@@ -32,14 +29,12 @@ ipch
 ## Getting files created in JSON/Schemas/Catalog/ from a VS2022 update
 JSON/
 
-## Commonly used CMake directories & CMake CPM cache
+## Commonly used CMake directories
 build*/
-.cache
 
-## Xcode & macOS artifacts
+## Xcode artifacts
 project.xcworkspace
 xcuserdata
-examples/*/*.dSYM
 
 ## Emscripten artifacts
 examples/*.o.tmp
@@ -49,30 +44,18 @@ examples/example_glfw_opengl3/web/*
 examples/example_glfw_wgpu/web/*
 examples/example_glfw_wgpu/external/*
 examples/example_sdl2_opengl3/web/*
-examples/example_sdl2_wgpu/web/*
-examples/example_sdl3_opengl3/web/*
-examples/example_sdl3_wgpu/web/*
 
 ## JetBrains IDE artifacts
 .idea
 cmake-build-*
 
 ## Unix executables from our example Makefiles
-examples/example_apple_metal/example_apple_metal
-examples/example_apple_opengl2/example_apple_opengl2
 examples/example_glfw_metal/example_glfw_metal
 examples/example_glfw_opengl2/example_glfw_opengl2
 examples/example_glfw_opengl3/example_glfw_opengl3
-examples/example_glfw_vulkan/example_glfw_vulkan
 examples/example_glut_opengl2/example_glut_opengl2
 examples/example_null/example_null
 examples/example_sdl2_metal/example_sdl2_metal
 examples/example_sdl2_opengl2/example_sdl2_opengl2
 examples/example_sdl2_opengl3/example_sdl2_opengl3
-examples/example_sdl2_sdlrenderer2/example_sdl2_sdlrenderer2
-examples/example_sdl2_vulkan/example_sdl2_vulkan
-examples/example_sdl3_metal/example_sdl3_metal
-examples/example_sdl3_opengl3/example_sdl3_opengl3
-examples/example_sdl3_sdlgpu3/example_sdl3_sdlgpu3
-examples/example_sdl3_sdlrenderer3/example_sdl3_sdlrenderer3
-examples/example_sdl3_vulkan/example_sdl3_vulkan
+examples/example_sdl2_sdlrenderer/example_sdl2_sdlrenderer

LICENSE.txt

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014-2026 Omar Cornut
+Copyright (c) 2014-2025 Omar Cornut
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

backends/imgui_impl_allegro5.cpp

@@ -2,15 +2,14 @@
 // (Info: Allegro 5 is a cross-platform general purpose library for handling windows, inputs, graphics, etc.)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'ALLEGRO_BITMAP*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy ALLEGRO_KEY_* values are obsolete since 1.87 and not supported since 1.91.5]
 //  [X] Platform: Clipboard support (from Allegro 5.1.12).
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
 // Missing features or Issues:
 //  [ ] Renderer: The renderer is suboptimal as we need to unindex our buffers and convert vertices manually.
-//  [ ] Renderer: Missing support for DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest callbacks: Allegro5 cannot enable/disable LINEAR bitmap flags after creation.
 //  [ ] Platform: Missing gamepad support.
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -22,13 +21,6 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState (others cannot be supported by Allegro5). (#9378)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() and platform_io.ClearPlatformHandlers() on shutdown.
-//  2025-08-12: Inputs: fixed missing support for ImGuiKey_PrintScreen under Windows, as raw Allegro 5 does not receive it.
-//  2025-08-12: Added ImGui_ImplAllegro5_SetDisplay() function to change current ALLEGRO_DISPLAY, as Allegro applications often need to do that.
-//  2025-07-07: Fixed texture update broken on some platforms where ALLEGRO_LOCK_WRITEONLY needed all texels to be rewritten.
-//  2025-06-11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplSDLGPU3_CreateFontsTexture() and ImGui_ImplSDLGPU3_DestroyFontsTexture().
-//  2025-02-18: Added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress mouse cursor support.
 //  2025-01-06: Avoid calling al_set_mouse_cursor() repeatedly since it appears to leak on on X11 (#8256).
 //  2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
 //               - io.GetClipboardTextFn    -> platform_io.Platform_GetClipboardTextFn
@@ -138,26 +130,15 @@ static void ImGui_ImplAllegro5_SetupRenderState(ImDrawData* draw_data)
     }
 }
 
-// Draw callbacks
-static void ImGui_ImplAllegro5_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*) {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-
-// Render function
+// Render function.
 void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
 {
     // Avoid rendering when minimized
     if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
         return;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplAllegro5_UpdateTexture(tex);
-
     // Backup Allegro state that will be modified
     ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
     ALLEGRO_TRANSFORM last_transform = *al_get_current_transform();
     ALLEGRO_TRANSFORM last_projection_transform = *al_get_current_projection_transform();
     int last_clip_x, last_clip_y, last_clip_w, last_clip_h;
@@ -169,8 +150,10 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
     ImGui_ImplAllegro5_SetupRenderState(draw_data);
 
     // Render command lists
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
+
         ImVector<ImDrawVertAllegro>& vertices = bd->BufVertices;
 #if ALLEGRO_HAS_DRAW_INDEXED_PRIM
         vertices.resize(draw_list->VtxBuffer.Size);
@@ -214,7 +197,8 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
             if (pcmd->UserCallback)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplAllegro5_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplAllegro5_SetupRenderState(draw_data);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -248,7 +232,43 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
 
 bool ImGui_ImplAllegro5_CreateDeviceObjects()
 {
+    // Build texture atlas
     ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+
+    // Create texture
+    // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+    int flags = al_get_new_bitmap_flags();
+    int fmt = al_get_new_bitmap_format();
+    al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP | ALLEGRO_MIN_LINEAR | ALLEGRO_MAG_LINEAR);
+    al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_ABGR_8888_LE);
+    ALLEGRO_BITMAP* img = al_create_bitmap(width, height);
+    al_set_new_bitmap_flags(flags);
+    al_set_new_bitmap_format(fmt);
+    if (!img)
+        return false;
+
+    ALLEGRO_LOCKED_REGION* locked_img = al_lock_bitmap(img, al_get_bitmap_format(img), ALLEGRO_LOCK_WRITEONLY);
+    if (!locked_img)
+    {
+        al_destroy_bitmap(img);
+        return false;
+    }
+    memcpy(locked_img->data, pixels, sizeof(int) * width * height);
+    al_unlock_bitmap(img);
+
+    // Convert software texture to hardware texture.
+    ALLEGRO_BITMAP* cloned_img = al_clone_bitmap(img);
+    al_destroy_bitmap(img);
+    if (!cloned_img)
+        return false;
+
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)(intptr_t)cloned_img);
+    bd->Texture = cloned_img;
 
     // Create an invisible mouse cursor
     // Because al_hide_mouse_cursor() seems to mess up with the actual inputs..
@@ -259,82 +279,16 @@ bool ImGui_ImplAllegro5_CreateDeviceObjects()
     return true;
 }
 
-void ImGui_ImplAllegro5_UpdateTexture(ImTextureData* tex)
-{
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-
-        // Create texture
-        // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
-        const int new_bitmap_flags = al_get_new_bitmap_flags();
-        int new_bitmap_format = al_get_new_bitmap_format();
-        al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP | ALLEGRO_MIN_LINEAR | ALLEGRO_MAG_LINEAR);
-        al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_ABGR_8888_LE);
-        ALLEGRO_BITMAP* cpu_bitmap = al_create_bitmap(tex->Width, tex->Height);
-        IM_ASSERT(cpu_bitmap != nullptr && "Backend failed to create texture!");
-
-        // Upload pixels
-        ALLEGRO_LOCKED_REGION* locked_region = al_lock_bitmap(cpu_bitmap, al_get_bitmap_format(cpu_bitmap), ALLEGRO_LOCK_WRITEONLY);
-        IM_ASSERT(locked_region != nullptr && "Backend failed to create texture!");
-        memcpy(locked_region->data, tex->GetPixels(), tex->GetSizeInBytes());
-        al_unlock_bitmap(cpu_bitmap);
-
-        // Convert software texture to hardware texture.
-        al_set_new_bitmap_flags(ALLEGRO_VIDEO_BITMAP);
-        al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_ANY_32_WITH_ALPHA);
-        ALLEGRO_BITMAP* gpu_bitmap = al_clone_bitmap(cpu_bitmap);
-        al_destroy_bitmap(cpu_bitmap);
-        IM_ASSERT(gpu_bitmap != nullptr && "Backend failed to create texture!");
-
-        al_set_new_bitmap_flags(new_bitmap_flags);
-        al_set_new_bitmap_format(new_bitmap_format);
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)gpu_bitmap);
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        ImTextureRect r = tex->UpdateRect; // Bounding box encompassing all individual updates
-        ALLEGRO_BITMAP* gpu_bitmap = (ALLEGRO_BITMAP*)(intptr_t)tex->TexID;
-        ALLEGRO_LOCKED_REGION* locked_region = al_lock_bitmap_region(gpu_bitmap, r.x, r.y, r.w, r.h, al_get_bitmap_format(gpu_bitmap), ALLEGRO_LOCK_WRITEONLY);
-        IM_ASSERT(locked_region && "Backend failed to update texture!");
-        for (int y = 0; y < r.h; y++)
-            memcpy((unsigned char*)locked_region->data + locked_region->pitch * y, tex->GetPixelsAt(r.x, r.y + y), r.w * tex->BytesPerPixel); // dst, src, block pitch
-        al_unlock_bitmap(gpu_bitmap);
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantDestroy)
-    {
-        ALLEGRO_BITMAP* backend_tex = (ALLEGRO_BITMAP*)(intptr_t)tex->TexID;
-        if (backend_tex)
-            al_destroy_bitmap(backend_tex);
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->SetStatus(ImTextureStatus_Destroyed);
-    }
-}
-
 void ImGui_ImplAllegro5_InvalidateDeviceObjects()
 {
+    ImGuiIO& io = ImGui::GetIO();
     ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
-
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-        {
-            tex->SetStatus(ImTextureStatus_WantDestroy);
-            ImGui_ImplAllegro5_UpdateTexture(tex);
-        }
-
-    // Destroy mouse cursor
+    if (bd->Texture)
+    {
+        io.Fonts->SetTexID(0);
+        al_destroy_bitmap(bd->Texture);
+        bd->Texture = nullptr;
+    }
     if (bd->MouseCursorInvisible)
     {
         al_destroy_mouse_cursor(bd->MouseCursorInvisible);
@@ -485,18 +439,27 @@ bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display)
     io.BackendPlatformUserData = (void*)bd;
     io.BackendPlatformName = io.BackendRendererName = "imgui_impl_allegro5";
     io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;       // We can honor GetMouseCursor() values (optional)
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
 
+    bd->Display = display;
     bd->LastCursor = ALLEGRO_SYSTEM_MOUSE_CURSOR_NONE;
 
-    ImGui_ImplAllegro5_SetDisplay(display);
+    // Create custom vertex declaration.
+    // Unfortunately Allegro doesn't support 32-bit packed colors so we have to convert them to 4 floats.
+    // We still use a custom declaration to use 'ALLEGRO_PRIM_TEX_COORD' instead of 'ALLEGRO_PRIM_TEX_COORD_PIXEL' else we can't do a reliable conversion.
+    ALLEGRO_VERTEX_ELEMENT elems[] =
+    {
+        { ALLEGRO_PRIM_POSITION, ALLEGRO_PRIM_FLOAT_2, offsetof(ImDrawVertAllegro, pos) },
+        { ALLEGRO_PRIM_TEX_COORD, ALLEGRO_PRIM_FLOAT_2, offsetof(ImDrawVertAllegro, uv) },
+        { ALLEGRO_PRIM_COLOR_ATTR, 0, offsetof(ImDrawVertAllegro, col) },
+        { 0, 0, 0 }
+    };
+    bd->VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro));
 
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 #if ALLEGRO_HAS_CLIPBOARD
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
     platform_io.Platform_SetClipboardTextFn = ImGui_ImplAllegro5_SetClipboardText;
     platform_io.Platform_GetClipboardTextFn = ImGui_ImplAllegro5_GetClipboardText;
 #endif
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplAllegro5_DrawCallback_ResetRenderState;
 
     return true;
 }
@@ -506,7 +469,6 @@ void ImGui_ImplAllegro5_Shutdown()
     ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
     IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 
     ImGui_ImplAllegro5_InvalidateDeviceObjects();
     if (bd->VertexDecl)
@@ -516,39 +478,10 @@ void ImGui_ImplAllegro5_Shutdown()
 
     io.BackendPlatformName = io.BackendRendererName = nullptr;
     io.BackendPlatformUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
-    platform_io.ClearPlatformHandlers();
+    io.BackendFlags &= ~ImGuiBackendFlags_HasMouseCursors;
     IM_DELETE(bd);
 }
 
-void ImGui_ImplAllegro5_SetDisplay(ALLEGRO_DISPLAY* display)
-{
-    ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
-    bd->Display = display;
-
-    if (bd->VertexDecl)
-    {
-        al_destroy_vertex_decl(bd->VertexDecl);
-        bd->VertexDecl = nullptr;
-    }
-
-    if (bd->Display && !bd->VertexDecl)
-    {
-        // Create custom vertex declaration.
-        // Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats.
-        // We still use a custom declaration to use 'ALLEGRO_PRIM_TEX_COORD' instead of 'ALLEGRO_PRIM_TEX_COORD_PIXEL' else we can't do a reliable conversion.
-        ALLEGRO_VERTEX_ELEMENT elems[] =
-        {
-            { ALLEGRO_PRIM_POSITION, ALLEGRO_PRIM_FLOAT_2, offsetof(ImDrawVertAllegro, pos) },
-            { ALLEGRO_PRIM_TEX_COORD, ALLEGRO_PRIM_FLOAT_2, offsetof(ImDrawVertAllegro, uv) },
-            { ALLEGRO_PRIM_COLOR_ATTR, 0, offsetof(ImDrawVertAllegro, col) },
-            { 0, 0, 0 }
-        };
-        bd->VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro));
-    }
-}
-
 // ev->keyboard.modifiers seems always zero so using that...
 static void ImGui_ImplAllegro5_UpdateKeyModifiers()
 {
@@ -662,8 +595,6 @@ static void ImGui_ImplAllegro5_UpdateMouseCursor()
         case ImGuiMouseCursor_ResizeEW:     cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_E; break;
         case ImGuiMouseCursor_ResizeNESW:   cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NE; break;
         case ImGuiMouseCursor_ResizeNWSE:   cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NW; break;
-        case ImGuiMouseCursor_Wait:         cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_BUSY; break;
-        case ImGuiMouseCursor_Progress:     cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_PROGRESS; break;
         case ImGuiMouseCursor_NotAllowed:   cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_UNAVAILABLE; break;
         }
         al_set_system_mouse_cursor(bd->Display, cursor_id);
@@ -675,11 +606,12 @@ void ImGui_ImplAllegro5_NewFrame()
     ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplAllegro5_Init()?");
 
-    if (!bd->MouseCursorInvisible)
+    if (!bd->Texture)
         ImGui_ImplAllegro5_CreateDeviceObjects();
 
-    // Setup display size (every frame to accommodate for window resizing)
     ImGuiIO& io = ImGui::GetIO();
+
+    // Setup display size (every frame to accommodate for window resizing)
     int w, h;
     w = al_get_display_width(bd->Display);
     h = al_get_display_height(bd->Display);
@@ -690,11 +622,6 @@ void ImGui_ImplAllegro5_NewFrame()
     io.DeltaTime = bd->Time > 0.0 ? (float)(current_time - bd->Time) : (float)(1.0f / 60.0f);
     bd->Time = current_time;
 
-    // Allegro 5 doesn't receive PrintScreen under Windows
-#ifdef _WIN32
-    io.AddKeyEvent(ImGuiKey_PrintScreen, (::GetAsyncKeyState(VK_SNAPSHOT) & 0x8000) != 0);
-#endif
-
     // Setup mouse cursor shape
     ImGui_ImplAllegro5_UpdateMouseCursor();
 }

backends/imgui_impl_allegro5.h

@@ -2,15 +2,14 @@
 // (Info: Allegro 5 is a cross-platform general purpose library for handling windows, inputs, graphics, etc.)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'ALLEGRO_BITMAP*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy ALLEGRO_KEY_* values are obsolete since 1.87 and not supported since 1.91.5]
 //  [X] Platform: Clipboard support (from Allegro 5.1.12).
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
 // Missing features or Issues:
 //  [ ] Renderer: The renderer is suboptimal as we need to unindex our buffers and convert vertices manually.
-//  [ ] Renderer: Missing support for DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest callbacks: Allegro5 cannot enable/disable LINEAR bitmap flags after creation.
 //  [ ] Platform: Missing gamepad support.
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -33,13 +32,9 @@ IMGUI_IMPL_API void     ImGui_ImplAllegro5_Shutdown();
 IMGUI_IMPL_API void     ImGui_ImplAllegro5_NewFrame();
 IMGUI_IMPL_API void     ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data);
 IMGUI_IMPL_API bool     ImGui_ImplAllegro5_ProcessEvent(ALLEGRO_EVENT* event);
-IMGUI_IMPL_API void     ImGui_ImplAllegro5_SetDisplay(ALLEGRO_DISPLAY* display);
 
 // Use if you want to reset your rendering device without losing Dear ImGui state.
 IMGUI_IMPL_API bool     ImGui_ImplAllegro5_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplAllegro5_InvalidateDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplAllegro5_UpdateTexture(ImTextureData* tex);
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_android.cpp

@@ -6,8 +6,9 @@
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen/Pen.
 // Missing features or Issues:
 //  [ ] Platform: Clipboard support.
-//  [ ] Platform: Gamepad support.
+//  [ ] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [ ] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. FIXME: Check if this is even possible with Android.
+//  [ ] Platform: Multi-viewport support (multiple windows). Not meaningful on Android.
 // Important:
 //  - Consider using SDL or GLFW backend on Android, which will be more full-featured than this.
 //  - FIXME: On-screen keyboard currently needs to be enabled by the application (see examples/ and issue #3446)

backends/imgui_impl_android.h

@@ -6,8 +6,9 @@
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen/Pen.
 // Missing features or Issues:
 //  [ ] Platform: Clipboard support.
-//  [ ] Platform: Gamepad support.
+//  [ ] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [ ] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. FIXME: Check if this is even possible with Android.
+//  [ ] Platform: Multi-viewport support (multiple windows). Not meaningful on Android.
 // Important:
 //  - Consider using SDL or GLFW backend on Android, which will be more full-featured than this.
 //  - FIXME: On-screen keyboard currently needs to be enabled by the application (see examples/ and issue #3446)

backends/imgui_impl_dx10.cpp

@@ -2,9 +2,9 @@
 // This needs to be used along with a Platform Backend (e.g. Win32)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'ID3D10ShaderResourceView*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'ID3D10ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -16,11 +16,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: DirectX10: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. Obsoleting samplers from ImGui_ImplDX10_RenderState. (#9378)
-//  2026-01-19: DirectX10: Added 'SamplerNearest' in ImGui_ImplDX10_RenderState. Renamed 'SamplerDefault' to 'SamplerLinear'. 
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-06-11: DirectX10: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas.
-//  2025-05-07: DirectX10: Honor draw_data->FramebufferScale to allow for custom backends and experiment using it (consistently with other renderer backends, even though in normal condition it is not set under Windows).
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2025-01-06: DirectX10: Expose selected render state in ImGui_ImplDX10_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
 //  2024-10-07: DirectX10: Changed default texture sampler to Clamp instead of Repeat/Wrap.
 //  2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
@@ -53,19 +49,7 @@
 #pragma comment(lib, "d3dcompiler") // Automatically link with d3dcompiler.lib as we are using D3DCompile() below.
 #endif
 
-// Clang/GCC warnings with -Weverything
-#if defined(__clang__)
-#pragma clang diagnostic ignored "-Wold-style-cast"         // warning: use of old-style cast                            // yes, they are more terse.
-#pragma clang diagnostic ignored "-Wsign-conversion"        // warning: implicit conversion changes signedness
-#endif
-
-// DirectX10 data
-struct ImGui_ImplDX10_Texture
-{
-    ID3D10Texture2D*            pTexture;
-    ID3D10ShaderResourceView*   pTextureView;
-};
-
+// DirectX data
 struct ImGui_ImplDX10_Data
 {
     ID3D10Device*               pd3dDevice;
@@ -76,8 +60,8 @@ struct ImGui_ImplDX10_Data
     ID3D10InputLayout*          pInputLayout;
     ID3D10Buffer*               pVertexConstantBuffer;
     ID3D10PixelShader*          pPixelShader;
-    ID3D10SamplerState*         pTexSamplerLinear;
-    ID3D10SamplerState*         pTexSamplerNearest;
+    ID3D10SamplerState*         pFontSampler;
+    ID3D10ShaderResourceView*   pFontTextureView;
     ID3D10RasterizerState*      pRasterizerState;
     ID3D10BlendState*           pBlendState;
     ID3D10DepthStencilState*    pDepthStencilState;
@@ -99,15 +83,20 @@ static ImGui_ImplDX10_Data* ImGui_ImplDX10_GetBackendData()
     return ImGui::GetCurrentContext() ? (ImGui_ImplDX10_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
 }
 
+// Forward Declarations
+static void ImGui_ImplDX10_InitMultiViewportSupport();
+static void ImGui_ImplDX10_ShutdownMultiViewportSupport();
+
 // Functions
 static void ImGui_ImplDX10_SetupRenderState(ImDrawData* draw_data, ID3D10Device* device)
 {
     ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
 
     // Setup viewport
-    D3D10_VIEWPORT vp = {};
-    vp.Width = (UINT)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
-    vp.Height = (UINT)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
+    D3D10_VIEWPORT vp;
+    memset(&vp, 0, sizeof(D3D10_VIEWPORT));
+    vp.Width = (UINT)draw_data->DisplaySize.x;
+    vp.Height = (UINT)draw_data->DisplaySize.y;
     vp.MinDepth = 0.0f;
     vp.MaxDepth = 1.0f;
     vp.TopLeftX = vp.TopLeftY = 0;
@@ -144,7 +133,7 @@ static void ImGui_ImplDX10_SetupRenderState(ImDrawData* draw_data, ID3D10Device*
     device->VSSetShader(bd->pVertexShader);
     device->VSSetConstantBuffers(0, 1, &bd->pVertexConstantBuffer);
     device->PSSetShader(bd->pPixelShader);
-    device->PSSetSamplers(0, 1, &bd->pTexSamplerLinear);
+    device->PSSetSamplers(0, 1, &bd->pFontSampler);
     device->GSSetShader(nullptr);
 
     // Setup render state
@@ -154,11 +143,6 @@ static void ImGui_ImplDX10_SetupRenderState(ImDrawData* draw_data, ID3D10Device*
     device->RSSetState(bd->pRasterizerState);
 }
 
-// Draw callbacks
-static void ImGui_ImplDX10_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)       {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplDX10_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)       { ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData(); bd->pd3dDevice->PSSetSamplers(0, 1, &bd->pTexSamplerLinear); }
-static void ImGui_ImplDX10_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)      { ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData(); bd->pd3dDevice->PSSetSamplers(0, 1, &bd->pTexSamplerNearest); }
-
 // Render function
 void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
 {
@@ -169,21 +153,15 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
     ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
     ID3D10Device* device = bd->pd3dDevice;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplDX10_UpdateTexture(tex);
-
     // Create and grow vertex/index buffers if needed
     if (!bd->pVB || bd->VertexBufferSize < draw_data->TotalVtxCount)
     {
         if (bd->pVB) { bd->pVB->Release(); bd->pVB = nullptr; }
         bd->VertexBufferSize = draw_data->TotalVtxCount + 5000;
-        D3D10_BUFFER_DESC desc = {};
+        D3D10_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D10_BUFFER_DESC));
         desc.Usage = D3D10_USAGE_DYNAMIC;
-        desc.ByteWidth = (UINT)bd->VertexBufferSize * sizeof(ImDrawVert);
+        desc.ByteWidth = bd->VertexBufferSize * sizeof(ImDrawVert);
         desc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
         desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
         desc.MiscFlags = 0;
@@ -195,9 +173,10 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
     {
         if (bd->pIB) { bd->pIB->Release(); bd->pIB = nullptr; }
         bd->IndexBufferSize = draw_data->TotalIdxCount + 10000;
-        D3D10_BUFFER_DESC desc = {};
+        D3D10_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D10_BUFFER_DESC));
         desc.Usage = D3D10_USAGE_DYNAMIC;
-        desc.ByteWidth = (UINT)bd->IndexBufferSize * sizeof(ImDrawIdx);
+        desc.ByteWidth = bd->IndexBufferSize * sizeof(ImDrawIdx);
         desc.BindFlags = D3D10_BIND_INDEX_BUFFER;
         desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
         if (device->CreateBuffer(&desc, nullptr, &bd->pIB) < 0)
@@ -209,8 +188,9 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
     ImDrawIdx* idx_dst = nullptr;
     bd->pVB->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**)&vtx_dst);
     bd->pIB->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**)&idx_dst);
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         memcpy(vtx_dst, draw_list->VtxBuffer.Data, draw_list->VtxBuffer.Size * sizeof(ImDrawVert));
         memcpy(idx_dst, draw_list->IdxBuffer.Data, draw_list->IdxBuffer.Size * sizeof(ImDrawIdx));
         vtx_dst += draw_list->VtxBuffer.Size;
@@ -266,6 +246,7 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
     ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
     ImGui_ImplDX10_RenderState render_state;
     render_state.Device = bd->pd3dDevice;
+    render_state.SamplerDefault = bd->pFontSampler;
     render_state.VertexConstantBuffer = bd->pVertexConstantBuffer;
     platform_io.Renderer_RenderState = &render_state;
 
@@ -274,16 +255,17 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
     int global_vtx_offset = 0;
     int global_idx_offset = 0;
     ImVec2 clip_off = draw_data->DisplayPos;
-    ImVec2 clip_scale = draw_data->FramebufferScale;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback != nullptr)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplDX10_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplDX10_SetupRenderState(draw_data, device);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -291,8 +273,8 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
             else
             {
                 // Project scissor/clipping rectangles into framebuffer space
-                ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
-                ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y);
+                ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y);
+                ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y);
                 if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
                     continue;
 
@@ -329,39 +311,21 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
     device->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
 }
 
-static void ImGui_ImplDX10_DestroyTexture(ImTextureData* tex)
-{
-    if (ImGui_ImplDX10_Texture* backend_tex = (ImGui_ImplDX10_Texture*)tex->BackendUserData)
-    {
-        IM_ASSERT(backend_tex->pTextureView == (ID3D10ShaderResourceView*)(intptr_t)tex->TexID);
-        backend_tex->pTextureView->Release();
-        backend_tex->pTexture->Release();
-        IM_DELETE(backend_tex);
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->BackendUserData = nullptr;
-    }
-    tex->SetStatus(ImTextureStatus_Destroyed);
-}
-
-void ImGui_ImplDX10_UpdateTexture(ImTextureData* tex)
+static void ImGui_ImplDX10_CreateFontsTexture()
 {
+    // Build texture atlas
     ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-        unsigned int* pixels = (unsigned int*)tex->GetPixels();
-        ImGui_ImplDX10_Texture* backend_tex = IM_NEW(ImGui_ImplDX10_Texture)();
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
 
-        // Create texture
+    // Upload texture to graphics system
+    {
         D3D10_TEXTURE2D_DESC desc;
         ZeroMemory(&desc, sizeof(desc));
-        desc.Width = (UINT)tex->Width;
-        desc.Height = (UINT)tex->Height;
+        desc.Width = width;
+        desc.Height = height;
         desc.MipLevels = 1;
         desc.ArraySize = 1;
         desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
@@ -370,12 +334,13 @@ void ImGui_ImplDX10_UpdateTexture(ImTextureData* tex)
         desc.BindFlags = D3D10_BIND_SHADER_RESOURCE;
         desc.CPUAccessFlags = 0;
 
+        ID3D10Texture2D* pTexture = nullptr;
         D3D10_SUBRESOURCE_DATA subResource;
         subResource.pSysMem = pixels;
         subResource.SysMemPitch = desc.Width * 4;
         subResource.SysMemSlicePitch = 0;
-        bd->pd3dDevice->CreateTexture2D(&desc, &subResource, &backend_tex->pTexture);
-        IM_ASSERT(backend_tex->pTexture != nullptr && "Backend failed to create texture!");
+        bd->pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);
+        IM_ASSERT(pTexture != nullptr);
 
         // Create texture view
         D3D10_SHADER_RESOURCE_VIEW_DESC srv_desc;
@@ -384,29 +349,23 @@ void ImGui_ImplDX10_UpdateTexture(ImTextureData* tex)
         srv_desc.ViewDimension = D3D10_SRV_DIMENSION_TEXTURE2D;
         srv_desc.Texture2D.MipLevels = desc.MipLevels;
         srv_desc.Texture2D.MostDetailedMip = 0;
-        bd->pd3dDevice->CreateShaderResourceView(backend_tex->pTexture, &srv_desc, &backend_tex->pTextureView);
-        IM_ASSERT(backend_tex->pTextureView != nullptr && "Backend failed to create texture!");
+        bd->pd3dDevice->CreateShaderResourceView(pTexture, &srv_desc, &bd->pFontTextureView);
+        pTexture->Release();
+    }
 
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)backend_tex->pTextureView);
-        tex->SetStatus(ImTextureStatus_OK);
-        tex->BackendUserData = backend_tex;
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)bd->pFontTextureView);
+}
+
+static void ImGui_ImplDX10_DestroyFontsTexture()
+{
+    ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
+    if (bd->pFontTextureView)
     {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        ImGui_ImplDX10_Texture* backend_tex = (ImGui_ImplDX10_Texture*)tex->BackendUserData;
-        IM_ASSERT(backend_tex->pTextureView == (ID3D10ShaderResourceView*)(intptr_t)tex->TexID);
-        for (ImTextureRect& r : tex->Updates)
-        {
-            D3D10_BOX box = { (UINT)r.x, (UINT)r.y, (UINT)0, (UINT)(r.x + r.w), (UINT)(r.y + r.h), (UINT)1 };
-            bd->pd3dDevice->UpdateSubresource(backend_tex->pTexture, 0, &box, tex->GetPixelsAt(r.x, r.y), (UINT)tex->GetPitch(), 0);
-        }
-        tex->SetStatus(ImTextureStatus_OK);
+        bd->pFontTextureView->Release();
+        bd->pFontTextureView = nullptr;
+        ImGui::GetIO().Fonts->SetTexID(0); // We copied bd->pFontTextureView to io.Fonts->TexID so let's clear that as well.
     }
-    if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
-        ImGui_ImplDX10_DestroyTexture(tex);
 }
 
 bool    ImGui_ImplDX10_CreateDeviceObjects()
@@ -414,7 +373,8 @@ bool    ImGui_ImplDX10_CreateDeviceObjects()
     ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
     if (!bd->pd3dDevice)
         return false;
-    ImGui_ImplDX10_InvalidateDeviceObjects();
+    if (bd->pFontSampler)
+        ImGui_ImplDX10_InvalidateDeviceObjects();
 
     // By using D3DCompile() from <d3dcompiler.h> / d3dcompiler.lib, we introduce a dependency to a given version of d3dcompiler_XX.dll (see D3DCOMPILER_DLL_A)
     // If you would like to use this DX10 sample code but remove this dependency you can:
@@ -477,7 +437,7 @@ bool    ImGui_ImplDX10_CreateDeviceObjects()
 
         // Create the constant buffer
         {
-            D3D10_BUFFER_DESC desc = {};
+            D3D10_BUFFER_DESC desc;
             desc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER_DX10);
             desc.Usage = D3D10_USAGE_DYNAMIC;
             desc.BindFlags = D3D10_BIND_CONSTANT_BUFFER;
@@ -570,11 +530,11 @@ bool    ImGui_ImplDX10_CreateDeviceObjects()
         desc.ComparisonFunc = D3D10_COMPARISON_ALWAYS;
         desc.MinLOD = 0.f;
         desc.MaxLOD = 0.f;
-        bd->pd3dDevice->CreateSamplerState(&desc, &bd->pTexSamplerLinear);
-        desc.Filter = D3D10_FILTER_MIN_MAG_MIP_POINT;
-        bd->pd3dDevice->CreateSamplerState(&desc, &bd->pTexSamplerNearest);
+        bd->pd3dDevice->CreateSamplerState(&desc, &bd->pFontSampler);
     }
 
+    ImGui_ImplDX10_CreateFontsTexture();
+
     return true;
 }
 
@@ -584,12 +544,9 @@ void    ImGui_ImplDX10_InvalidateDeviceObjects()
     if (!bd->pd3dDevice)
         return;
 
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-            ImGui_ImplDX10_DestroyTexture(tex);
-    if (bd->pTexSamplerLinear)      { bd->pTexSamplerLinear->Release(); bd->pTexSamplerLinear = nullptr; }
-    if (bd->pTexSamplerNearest)     { bd->pTexSamplerNearest->Release(); bd->pTexSamplerNearest = nullptr; }
+    ImGui_ImplDX10_DestroyFontsTexture();
+
+    if (bd->pFontSampler)           { bd->pFontSampler->Release(); bd->pFontSampler = nullptr; }
     if (bd->pIB)                    { bd->pIB->Release(); bd->pIB = nullptr; }
     if (bd->pVB)                    { bd->pVB->Release(); bd->pVB = nullptr; }
     if (bd->pBlendState)            { bd->pBlendState->Release(); bd->pBlendState = nullptr; }
@@ -612,13 +569,7 @@ bool    ImGui_ImplDX10_Init(ID3D10Device* device)
     io.BackendRendererUserData = (void*)bd;
     io.BackendRendererName = "imgui_impl_dx10";
     io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
-
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = D3D10_REQ_TEXTURE2D_U_OR_V_DIMENSION;
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplDX10_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplDX10_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplDX10_DrawCallback_SetSamplerNearest;
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;  // We can create multi-viewports on the Renderer side (optional)
 
     // Get factory from device
     IDXGIDevice* pDXGIDevice = nullptr;
@@ -635,6 +586,8 @@ bool    ImGui_ImplDX10_Init(ID3D10Device* device)
     if (pDXGIAdapter) pDXGIAdapter->Release();
     bd->pd3dDevice->AddRef();
 
+    ImGui_ImplDX10_InitMultiViewportSupport();
+
     return true;
 }
 
@@ -643,16 +596,14 @@ void ImGui_ImplDX10_Shutdown()
     ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
     IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 
+    ImGui_ImplDX10_ShutdownMultiViewportSupport();
     ImGui_ImplDX10_InvalidateDeviceObjects();
     if (bd->pFactory) { bd->pFactory->Release(); }
     if (bd->pd3dDevice) { bd->pd3dDevice->Release(); }
-
     io.BackendRendererName = nullptr;
     io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
+    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasViewports);
     IM_DELETE(bd);
 }
 
@@ -662,8 +613,130 @@ void ImGui_ImplDX10_NewFrame()
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplDX10_Init()?");
 
     if (!bd->pVertexShader)
-        if (!ImGui_ImplDX10_CreateDeviceObjects())
-            IM_ASSERT(0 && "ImGui_ImplDX10_CreateDeviceObjects() failed!");
+        ImGui_ImplDX10_CreateDeviceObjects();
+}
+
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+// Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
+struct ImGui_ImplDX10_ViewportData
+{
+    IDXGISwapChain*         SwapChain;
+    ID3D10RenderTargetView* RTView;
+
+    ImGui_ImplDX10_ViewportData()   { SwapChain = nullptr; RTView = nullptr; }
+    ~ImGui_ImplDX10_ViewportData()  { IM_ASSERT(SwapChain == nullptr && RTView == nullptr); }
+};
+
+static void ImGui_ImplDX10_CreateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
+    ImGui_ImplDX10_ViewportData* vd = IM_NEW(ImGui_ImplDX10_ViewportData)();
+    viewport->RendererUserData = vd;
+
+    // PlatformHandleRaw should always be a HWND, whereas PlatformHandle might be a higher-level handle (e.g. GLFWWindow*, SDL_Window*).
+    // Some backends will leave PlatformHandleRaw == 0, in which case we assume PlatformHandle will contain the HWND.
+    HWND hwnd = viewport->PlatformHandleRaw ? (HWND)viewport->PlatformHandleRaw : (HWND)viewport->PlatformHandle;
+    IM_ASSERT(hwnd != 0);
+
+    // Create swap chain
+    DXGI_SWAP_CHAIN_DESC sd;
+    ZeroMemory(&sd, sizeof(sd));
+    sd.BufferDesc.Width = (UINT)viewport->Size.x;
+    sd.BufferDesc.Height = (UINT)viewport->Size.y;
+    sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+    sd.SampleDesc.Count = 1;
+    sd.SampleDesc.Quality = 0;
+    sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    sd.BufferCount = 1;
+    sd.OutputWindow = hwnd;
+    sd.Windowed = TRUE;
+    sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+    sd.Flags = 0;
+
+    IM_ASSERT(vd->SwapChain == nullptr && vd->RTView == nullptr);
+    bd->pFactory->CreateSwapChain(bd->pd3dDevice, &sd, &vd->SwapChain);
+
+    // Create the render target
+    if (vd->SwapChain)
+    {
+        ID3D10Texture2D* pBackBuffer;
+        vd->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+        bd->pd3dDevice->CreateRenderTargetView(pBackBuffer, nullptr, &vd->RTView);
+        pBackBuffer->Release();
+    }
+}
+
+static void ImGui_ImplDX10_DestroyWindow(ImGuiViewport* viewport)
+{
+    // The main viewport (owned by the application) will always have RendererUserData == 0 here since we didn't create the data for it.
+    if (ImGui_ImplDX10_ViewportData* vd = (ImGui_ImplDX10_ViewportData*)viewport->RendererUserData)
+    {
+        if (vd->SwapChain)
+            vd->SwapChain->Release();
+        vd->SwapChain = nullptr;
+        if (vd->RTView)
+            vd->RTView->Release();
+        vd->RTView = nullptr;
+        IM_DELETE(vd);
+    }
+    viewport->RendererUserData = nullptr;
+}
+
+static void ImGui_ImplDX10_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
+    ImGui_ImplDX10_ViewportData* vd = (ImGui_ImplDX10_ViewportData*)viewport->RendererUserData;
+    if (vd->RTView)
+    {
+        vd->RTView->Release();
+        vd->RTView = nullptr;
+    }
+    if (vd->SwapChain)
+    {
+        ID3D10Texture2D* pBackBuffer = nullptr;
+        vd->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
+        vd->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+        if (pBackBuffer == nullptr) { fprintf(stderr, "ImGui_ImplDX10_SetWindowSize() failed creating buffers.\n"); return; }
+        bd->pd3dDevice->CreateRenderTargetView(pBackBuffer, nullptr, &vd->RTView);
+        pBackBuffer->Release();
+    }
+}
+
+static void ImGui_ImplDX10_RenderViewport(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplDX10_Data* bd = ImGui_ImplDX10_GetBackendData();
+    ImGui_ImplDX10_ViewportData* vd = (ImGui_ImplDX10_ViewportData*)viewport->RendererUserData;
+    ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);
+    bd->pd3dDevice->OMSetRenderTargets(1, &vd->RTView, nullptr);
+    if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
+        bd->pd3dDevice->ClearRenderTargetView(vd->RTView, (float*)&clear_color);
+    ImGui_ImplDX10_RenderDrawData(viewport->DrawData);
+}
+
+static void ImGui_ImplDX10_SwapBuffers(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplDX10_ViewportData* vd = (ImGui_ImplDX10_ViewportData*)viewport->RendererUserData;
+    vd->SwapChain->Present(0, 0); // Present without vsync
+}
+
+void ImGui_ImplDX10_InitMultiViewportSupport()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Renderer_CreateWindow = ImGui_ImplDX10_CreateWindow;
+    platform_io.Renderer_DestroyWindow = ImGui_ImplDX10_DestroyWindow;
+    platform_io.Renderer_SetWindowSize = ImGui_ImplDX10_SetWindowSize;
+    platform_io.Renderer_RenderWindow = ImGui_ImplDX10_RenderViewport;
+    platform_io.Renderer_SwapBuffers = ImGui_ImplDX10_SwapBuffers;
+}
+
+void ImGui_ImplDX10_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
 }
 
 //-----------------------------------------------------------------------------

backends/imgui_impl_dx10.h

@@ -2,9 +2,9 @@
 // This needs to be used along with a Platform Backend (e.g. Win32)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'ID3D10ShaderResourceView*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'ID3D10ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -32,18 +32,14 @@ IMGUI_IMPL_API void     ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data);
 IMGUI_IMPL_API bool     ImGui_ImplDX10_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplDX10_InvalidateDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplDX10_UpdateTexture(ImTextureData* tex);
-
 // [BETA] Selected render state data shared with callbacks.
 // This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplDX10_RenderDrawData() call.
 // (Please open an issue if you feel you need access to more data)
 struct ImGui_ImplDX10_RenderState
 {
     ID3D10Device*           Device;
+    ID3D10SamplerState*     SamplerDefault;
     ID3D10Buffer*           VertexConstantBuffer;
-    //ID3D10SamplerState*   SamplerLinear;          // Use ImDrawList::AddCallback(ImGui::GetPlatform().DrawCallback_SetSamplerLinear)
-    //ID3D10SamplerState*   SamplerNearest;         // Use ImDrawList::AddCallback(ImGui::GetPlatform().DrawCallback_SetSamplerNearest)
 };
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_dx11.cpp

@@ -2,10 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. Win32)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -17,11 +17,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: DirectX11: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. Obsoleting samplers from ImGui_ImplDX11_RenderState. (#9378)
-//  2026-01-19: DirectX11: Added 'SamplerNearest' in ImGui_ImplDX11_RenderState. Renamed 'SamplerDefault' to 'SamplerLinear'.
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-06-11: DirectX11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas.
-//  2025-05-07: DirectX11: Honor draw_data->FramebufferScale to allow for custom backends and experiment using it (consistently with other renderer backends, even though in normal condition it is not set under Windows).
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2025-01-06: DirectX11: Expose VertexConstantBuffer in ImGui_ImplDX11_RenderState. Reset projection matrix in ImDrawCallback_ResetRenderState handler.
 //  2024-10-07: DirectX11: Changed default texture sampler to Clamp instead of Repeat/Wrap.
 //  2024-10-07: DirectX11: Expose selected render state in ImGui_ImplDX11_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
@@ -55,19 +51,7 @@
 #pragma comment(lib, "d3dcompiler") // Automatically link with d3dcompiler.lib as we are using D3DCompile() below.
 #endif
 
-// Clang/GCC warnings with -Weverything
-#if defined(__clang__)
-#pragma clang diagnostic ignored "-Wold-style-cast"         // warning: use of old-style cast                            // yes, they are more terse.
-#pragma clang diagnostic ignored "-Wsign-conversion"        // warning: implicit conversion changes signedness
-#endif
-
 // DirectX11 data
-struct ImGui_ImplDX11_Texture
-{
-    ID3D11Texture2D*            pTexture;
-    ID3D11ShaderResourceView*   pTextureView;
-};
-
 struct ImGui_ImplDX11_Data
 {
     ID3D11Device*               pd3dDevice;
@@ -79,14 +63,13 @@ struct ImGui_ImplDX11_Data
     ID3D11InputLayout*          pInputLayout;
     ID3D11Buffer*               pVertexConstantBuffer;
     ID3D11PixelShader*          pPixelShader;
-    ID3D11SamplerState*         pTexSamplerLinear;
-    ID3D11SamplerState*         pTexSamplerNearest;
+    ID3D11SamplerState*         pFontSampler;
+    ID3D11ShaderResourceView*   pFontTextureView;
     ID3D11RasterizerState*      pRasterizerState;
     ID3D11BlendState*           pBlendState;
     ID3D11DepthStencilState*    pDepthStencilState;
     int                         VertexBufferSize;
     int                         IndexBufferSize;
-    ImGui_ImplDX11_RenderState* RenderState;            // == (ImGui_ImplDX11_RenderState*)ImGui::GetPlatformIO().Renderer_RenderState during rendering.
 
     ImGui_ImplDX11_Data()       { memset((void*)this, 0, sizeof(*this)); VertexBufferSize = 5000; IndexBufferSize = 10000; }
 };
@@ -103,15 +86,20 @@ static ImGui_ImplDX11_Data* ImGui_ImplDX11_GetBackendData()
     return ImGui::GetCurrentContext() ? (ImGui_ImplDX11_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
 }
 
+// Forward Declarations
+static void ImGui_ImplDX11_InitMultiViewportSupport();
+static void ImGui_ImplDX11_ShutdownMultiViewportSupport();
+
 // Functions
-static void ImGui_ImplDX11_SetupRenderState(const ImDrawData* draw_data, ID3D11DeviceContext* device_ctx)
+static void ImGui_ImplDX11_SetupRenderState(ImDrawData* draw_data, ID3D11DeviceContext* device_ctx)
 {
     ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
 
     // Setup viewport
-    D3D11_VIEWPORT vp = {};
-    vp.Width = draw_data->DisplaySize.x * draw_data->FramebufferScale.x;
-    vp.Height = draw_data->DisplaySize.y * draw_data->FramebufferScale.y;
+    D3D11_VIEWPORT vp;
+    memset(&vp, 0, sizeof(D3D11_VIEWPORT));
+    vp.Width = draw_data->DisplaySize.x;
+    vp.Height = draw_data->DisplaySize.y;
     vp.MinDepth = 0.0f;
     vp.MaxDepth = 1.0f;
     vp.TopLeftX = vp.TopLeftY = 0;
@@ -148,7 +136,7 @@ static void ImGui_ImplDX11_SetupRenderState(const ImDrawData* draw_data, ID3D11D
     device_ctx->VSSetShader(bd->pVertexShader, nullptr, 0);
     device_ctx->VSSetConstantBuffers(0, 1, &bd->pVertexConstantBuffer);
     device_ctx->PSSetShader(bd->pPixelShader, nullptr, 0);
-    device_ctx->PSSetSamplers(0, 1, &bd->pTexSamplerLinear);
+    device_ctx->PSSetSamplers(0, 1, &bd->pFontSampler);
     device_ctx->GSSetShader(nullptr, nullptr, 0);
     device_ctx->HSSetShader(nullptr, nullptr, 0); // In theory we should backup and restore this as well.. very infrequently used..
     device_ctx->DSSetShader(nullptr, nullptr, 0); // In theory we should backup and restore this as well.. very infrequently used..
@@ -161,11 +149,6 @@ static void ImGui_ImplDX11_SetupRenderState(const ImDrawData* draw_data, ID3D11D
     device_ctx->RSSetState(bd->pRasterizerState);
 }
 
-// Draw callbacks
-static void ImGui_ImplDX11_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)       {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplDX11_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)       { ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); bd->RenderState->DeviceContext->PSSetSamplers(0, 1, &bd->pTexSamplerLinear); }
-static void ImGui_ImplDX11_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)      { ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); bd->RenderState->DeviceContext->PSSetSamplers(0, 1, &bd->pTexSamplerNearest); }
-
 // Render function
 void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
 {
@@ -176,21 +159,15 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
     ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
     ID3D11DeviceContext* device = bd->pd3dDeviceContext;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplDX11_UpdateTexture(tex);
-
     // Create and grow vertex/index buffers if needed
     if (!bd->pVB || bd->VertexBufferSize < draw_data->TotalVtxCount)
     {
         if (bd->pVB) { bd->pVB->Release(); bd->pVB = nullptr; }
         bd->VertexBufferSize = draw_data->TotalVtxCount + 5000;
-        D3D11_BUFFER_DESC desc = {};
+        D3D11_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
         desc.Usage = D3D11_USAGE_DYNAMIC;
-        desc.ByteWidth = (UINT)bd->VertexBufferSize * sizeof(ImDrawVert);
+        desc.ByteWidth = bd->VertexBufferSize * sizeof(ImDrawVert);
         desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
         desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
         desc.MiscFlags = 0;
@@ -201,9 +178,10 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
     {
         if (bd->pIB) { bd->pIB->Release(); bd->pIB = nullptr; }
         bd->IndexBufferSize = draw_data->TotalIdxCount + 10000;
-        D3D11_BUFFER_DESC desc = {};
+        D3D11_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
         desc.Usage = D3D11_USAGE_DYNAMIC;
-        desc.ByteWidth = (UINT)bd->IndexBufferSize * sizeof(ImDrawIdx);
+        desc.ByteWidth = bd->IndexBufferSize * sizeof(ImDrawIdx);
         desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
         desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
         if (bd->pd3dDevice->CreateBuffer(&desc, nullptr, &bd->pIB) < 0)
@@ -218,8 +196,9 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
         return;
     ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource.pData;
     ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource.pData;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         memcpy(vtx_dst, draw_list->VtxBuffer.Data, draw_list->VtxBuffer.Size * sizeof(ImDrawVert));
         memcpy(idx_dst, draw_list->IdxBuffer.Data, draw_list->IdxBuffer.Size * sizeof(ImDrawIdx));
         vtx_dst += draw_list->VtxBuffer.Size;
@@ -281,24 +260,26 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
     ImGui_ImplDX11_RenderState render_state;
     render_state.Device = bd->pd3dDevice;
     render_state.DeviceContext = bd->pd3dDeviceContext;
+    render_state.SamplerDefault = bd->pFontSampler;
     render_state.VertexConstantBuffer = bd->pVertexConstantBuffer;
-    platform_io.Renderer_RenderState = bd->RenderState = &render_state;
+    platform_io.Renderer_RenderState = &render_state;
 
     // Render command lists
     // (Because we merged all buffers into a single one, we maintain our own offset into them)
     int global_idx_offset = 0;
     int global_vtx_offset = 0;
     ImVec2 clip_off = draw_data->DisplayPos;
-    ImVec2 clip_scale = draw_data->FramebufferScale;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback != nullptr)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplDX11_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplDX11_SetupRenderState(draw_data, device);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -306,8 +287,8 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
             else
             {
                 // Project scissor/clipping rectangles into framebuffer space
-                ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
-                ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y);
+                ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y);
+                ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y);
                 if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
                     continue;
 
@@ -324,7 +305,7 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
         global_idx_offset += draw_list->IdxBuffer.Size;
         global_vtx_offset += draw_list->VtxBuffer.Size;
     }
-    platform_io.Renderer_RenderState = bd->RenderState = nullptr;
+    platform_io.Renderer_RenderState = nullptr;
 
     // Restore modified DX state
     device->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
@@ -346,39 +327,21 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
     device->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
 }
 
-static void ImGui_ImplDX11_DestroyTexture(ImTextureData* tex)
-{
-    if (ImGui_ImplDX11_Texture* backend_tex = (ImGui_ImplDX11_Texture*)tex->BackendUserData)
-    {
-        IM_ASSERT(backend_tex->pTextureView == (ID3D11ShaderResourceView*)(intptr_t)tex->TexID);
-        backend_tex->pTextureView->Release();
-        backend_tex->pTexture->Release();
-        IM_DELETE(backend_tex);
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->BackendUserData = nullptr;
-    }
-    tex->SetStatus(ImTextureStatus_Destroyed);
-}
-
-void ImGui_ImplDX11_UpdateTexture(ImTextureData* tex)
+static void ImGui_ImplDX11_CreateFontsTexture()
 {
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
     ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-        unsigned int* pixels = (unsigned int*)tex->GetPixels();
-        ImGui_ImplDX11_Texture* backend_tex = IM_NEW(ImGui_ImplDX11_Texture)();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
 
-        // Create texture
+    // Upload texture to graphics system
+    {
         D3D11_TEXTURE2D_DESC desc;
         ZeroMemory(&desc, sizeof(desc));
-        desc.Width = (UINT)tex->Width;
-        desc.Height = (UINT)tex->Height;
+        desc.Width = width;
+        desc.Height = height;
         desc.MipLevels = 1;
         desc.ArraySize = 1;
         desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
@@ -386,12 +349,14 @@ void ImGui_ImplDX11_UpdateTexture(ImTextureData* tex)
         desc.Usage = D3D11_USAGE_DEFAULT;
         desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
         desc.CPUAccessFlags = 0;
+
+        ID3D11Texture2D* pTexture = nullptr;
         D3D11_SUBRESOURCE_DATA subResource;
         subResource.pSysMem = pixels;
         subResource.SysMemPitch = desc.Width * 4;
         subResource.SysMemSlicePitch = 0;
-        bd->pd3dDevice->CreateTexture2D(&desc, &subResource, &backend_tex->pTexture);
-        IM_ASSERT(backend_tex->pTexture != nullptr && "Backend failed to create texture!");
+        bd->pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);
+        IM_ASSERT(pTexture != nullptr);
 
         // Create texture view
         D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc;
@@ -400,29 +365,23 @@ void ImGui_ImplDX11_UpdateTexture(ImTextureData* tex)
         srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
         srvDesc.Texture2D.MipLevels = desc.MipLevels;
         srvDesc.Texture2D.MostDetailedMip = 0;
-        bd->pd3dDevice->CreateShaderResourceView(backend_tex->pTexture, &srvDesc, &backend_tex->pTextureView);
-        IM_ASSERT(backend_tex->pTextureView != nullptr && "Backend failed to create texture!");
+        bd->pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &bd->pFontTextureView);
+        pTexture->Release();
+    }
 
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)backend_tex->pTextureView);
-        tex->SetStatus(ImTextureStatus_OK);
-        tex->BackendUserData = backend_tex;
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)bd->pFontTextureView);
+}
+
+static void ImGui_ImplDX11_DestroyFontsTexture()
+{
+    ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
+    if (bd->pFontTextureView)
     {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        ImGui_ImplDX11_Texture* backend_tex = (ImGui_ImplDX11_Texture*)tex->BackendUserData;
-        IM_ASSERT(backend_tex->pTextureView == (ID3D11ShaderResourceView*)(intptr_t)tex->TexID);
-        for (ImTextureRect& r : tex->Updates)
-        {
-            D3D11_BOX box = { (UINT)r.x, (UINT)r.y, (UINT)0, (UINT)(r.x + r.w), (UINT)(r.y + r .h), (UINT)1 };
-            bd->pd3dDeviceContext->UpdateSubresource(backend_tex->pTexture, 0, &box, tex->GetPixelsAt(r.x, r.y), (UINT)tex->GetPitch(), 0);
-        }
-        tex->SetStatus(ImTextureStatus_OK);
+        bd->pFontTextureView->Release();
+        bd->pFontTextureView = nullptr;
+        ImGui::GetIO().Fonts->SetTexID(0); // We copied data->pFontTextureView to io.Fonts->TexID so let's clear that as well.
     }
-    if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
-        ImGui_ImplDX11_DestroyTexture(tex);
 }
 
 bool    ImGui_ImplDX11_CreateDeviceObjects()
@@ -430,7 +389,8 @@ bool    ImGui_ImplDX11_CreateDeviceObjects()
     ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
     if (!bd->pd3dDevice)
         return false;
-    ImGui_ImplDX11_InvalidateDeviceObjects();
+    if (bd->pFontSampler)
+        ImGui_ImplDX11_InvalidateDeviceObjects();
 
     // By using D3DCompile() from <d3dcompiler.h> / d3dcompiler.lib, we introduce a dependency to a given version of d3dcompiler_XX.dll (see D3DCOMPILER_DLL_A)
     // If you would like to use this DX11 sample code but remove this dependency you can:
@@ -493,7 +453,7 @@ bool    ImGui_ImplDX11_CreateDeviceObjects()
 
         // Create the constant buffer
         {
-            D3D11_BUFFER_DESC desc = {};
+            D3D11_BUFFER_DESC desc;
             desc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER_DX11);
             desc.Usage = D3D11_USAGE_DYNAMIC;
             desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
@@ -586,11 +546,11 @@ bool    ImGui_ImplDX11_CreateDeviceObjects()
         desc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
         desc.MinLOD = 0.f;
         desc.MaxLOD = 0.f;
-        bd->pd3dDevice->CreateSamplerState(&desc, &bd->pTexSamplerLinear);
-        desc.Filter = D3D11_FILTER_MIN_MAG_MIP_POINT;
-        bd->pd3dDevice->CreateSamplerState(&desc, &bd->pTexSamplerNearest);
+        bd->pd3dDevice->CreateSamplerState(&desc, &bd->pFontSampler);
     }
 
+    ImGui_ImplDX11_CreateFontsTexture();
+
     return true;
 }
 
@@ -600,13 +560,9 @@ void    ImGui_ImplDX11_InvalidateDeviceObjects()
     if (!bd->pd3dDevice)
         return;
 
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-            ImGui_ImplDX11_DestroyTexture(tex);
+    ImGui_ImplDX11_DestroyFontsTexture();
 
-    if (bd->pTexSamplerLinear)      { bd->pTexSamplerLinear->Release(); bd->pTexSamplerLinear = nullptr; }
-    if (bd->pTexSamplerNearest)     { bd->pTexSamplerNearest->Release(); bd->pTexSamplerNearest = nullptr; }
+    if (bd->pFontSampler)           { bd->pFontSampler->Release(); bd->pFontSampler = nullptr; }
     if (bd->pIB)                    { bd->pIB->Release(); bd->pIB = nullptr; }
     if (bd->pVB)                    { bd->pVB->Release(); bd->pVB = nullptr; }
     if (bd->pBlendState)            { bd->pBlendState->Release(); bd->pBlendState = nullptr; }
@@ -629,13 +585,7 @@ bool    ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_co
     io.BackendRendererUserData = (void*)bd;
     io.BackendRendererName = "imgui_impl_dx11";
     io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
-
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = D3D11_REQ_TEXTURE2D_U_OR_V_DIMENSION;
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplDX11_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplDX11_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplDX11_DrawCallback_SetSamplerNearest;
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;  // We can create multi-viewports on the Renderer side (optional)
 
     // Get factory from device
     IDXGIDevice* pDXGIDevice = nullptr;
@@ -655,6 +605,8 @@ bool    ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_co
     bd->pd3dDevice->AddRef();
     bd->pd3dDeviceContext->AddRef();
 
+    ImGui_ImplDX11_InitMultiViewportSupport();
+
     return true;
 }
 
@@ -663,17 +615,15 @@ void ImGui_ImplDX11_Shutdown()
     ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
     IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 
+    ImGui_ImplDX11_ShutdownMultiViewportSupport();
     ImGui_ImplDX11_InvalidateDeviceObjects();
     if (bd->pFactory)             { bd->pFactory->Release(); }
     if (bd->pd3dDevice)           { bd->pd3dDevice->Release(); }
     if (bd->pd3dDeviceContext)    { bd->pd3dDeviceContext->Release(); }
-
     io.BackendRendererName = nullptr;
     io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
+    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasViewports);
     IM_DELETE(bd);
 }
 
@@ -682,9 +632,131 @@ void ImGui_ImplDX11_NewFrame()
     ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplDX11_Init()?");
 
-    if (!bd->pVertexShader)
-        if (!ImGui_ImplDX11_CreateDeviceObjects())
-            IM_ASSERT(0 && "ImGui_ImplDX11_CreateDeviceObjects() failed!");
+    if (!bd->pFontSampler)
+        ImGui_ImplDX11_CreateDeviceObjects();
+}
+
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+// Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
+struct ImGui_ImplDX11_ViewportData
+{
+    IDXGISwapChain*                 SwapChain;
+    ID3D11RenderTargetView*         RTView;
+
+    ImGui_ImplDX11_ViewportData()   { SwapChain = nullptr; RTView = nullptr; }
+    ~ImGui_ImplDX11_ViewportData()  { IM_ASSERT(SwapChain == nullptr && RTView == nullptr); }
+};
+
+static void ImGui_ImplDX11_CreateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
+    ImGui_ImplDX11_ViewportData* vd = IM_NEW(ImGui_ImplDX11_ViewportData)();
+    viewport->RendererUserData = vd;
+
+    // PlatformHandleRaw should always be a HWND, whereas PlatformHandle might be a higher-level handle (e.g. GLFWWindow*, SDL_Window*).
+    // Some backends will leave PlatformHandleRaw == 0, in which case we assume PlatformHandle will contain the HWND.
+    HWND hwnd = viewport->PlatformHandleRaw ? (HWND)viewport->PlatformHandleRaw : (HWND)viewport->PlatformHandle;
+    IM_ASSERT(hwnd != 0);
+
+    // Create swap chain
+    DXGI_SWAP_CHAIN_DESC sd;
+    ZeroMemory(&sd, sizeof(sd));
+    sd.BufferDesc.Width = (UINT)viewport->Size.x;
+    sd.BufferDesc.Height = (UINT)viewport->Size.y;
+    sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+    sd.SampleDesc.Count = 1;
+    sd.SampleDesc.Quality = 0;
+    sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    sd.BufferCount = 1;
+    sd.OutputWindow = hwnd;
+    sd.Windowed = TRUE;
+    sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+    sd.Flags = 0;
+
+    IM_ASSERT(vd->SwapChain == nullptr && vd->RTView == nullptr);
+    bd->pFactory->CreateSwapChain(bd->pd3dDevice, &sd, &vd->SwapChain);
+
+    // Create the render target
+    if (vd->SwapChain)
+    {
+        ID3D11Texture2D* pBackBuffer;
+        vd->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+        bd->pd3dDevice->CreateRenderTargetView(pBackBuffer, nullptr, &vd->RTView);
+        pBackBuffer->Release();
+    }
+}
+
+static void ImGui_ImplDX11_DestroyWindow(ImGuiViewport* viewport)
+{
+    // The main viewport (owned by the application) will always have RendererUserData == nullptr since we didn't create the data for it.
+    if (ImGui_ImplDX11_ViewportData* vd = (ImGui_ImplDX11_ViewportData*)viewport->RendererUserData)
+    {
+        if (vd->SwapChain)
+            vd->SwapChain->Release();
+        vd->SwapChain = nullptr;
+        if (vd->RTView)
+            vd->RTView->Release();
+        vd->RTView = nullptr;
+        IM_DELETE(vd);
+    }
+    viewport->RendererUserData = nullptr;
+}
+
+static void ImGui_ImplDX11_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
+    ImGui_ImplDX11_ViewportData* vd = (ImGui_ImplDX11_ViewportData*)viewport->RendererUserData;
+    if (vd->RTView)
+    {
+        vd->RTView->Release();
+        vd->RTView = nullptr;
+    }
+    if (vd->SwapChain)
+    {
+        ID3D11Texture2D* pBackBuffer = nullptr;
+        vd->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
+        vd->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+        if (pBackBuffer == nullptr) { fprintf(stderr, "ImGui_ImplDX11_SetWindowSize() failed creating buffers.\n"); return; }
+        bd->pd3dDevice->CreateRenderTargetView(pBackBuffer, nullptr, &vd->RTView);
+        pBackBuffer->Release();
+    }
+}
+
+static void ImGui_ImplDX11_RenderWindow(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData();
+    ImGui_ImplDX11_ViewportData* vd = (ImGui_ImplDX11_ViewportData*)viewport->RendererUserData;
+    ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);
+    bd->pd3dDeviceContext->OMSetRenderTargets(1, &vd->RTView, nullptr);
+    if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
+        bd->pd3dDeviceContext->ClearRenderTargetView(vd->RTView, (float*)&clear_color);
+    ImGui_ImplDX11_RenderDrawData(viewport->DrawData);
+}
+
+static void ImGui_ImplDX11_SwapBuffers(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplDX11_ViewportData* vd = (ImGui_ImplDX11_ViewportData*)viewport->RendererUserData;
+    vd->SwapChain->Present(0, 0); // Present without vsync
+}
+
+static void ImGui_ImplDX11_InitMultiViewportSupport()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Renderer_CreateWindow = ImGui_ImplDX11_CreateWindow;
+    platform_io.Renderer_DestroyWindow = ImGui_ImplDX11_DestroyWindow;
+    platform_io.Renderer_SetWindowSize = ImGui_ImplDX11_SetWindowSize;
+    platform_io.Renderer_RenderWindow = ImGui_ImplDX11_RenderWindow;
+    platform_io.Renderer_SwapBuffers = ImGui_ImplDX11_SwapBuffers;
+}
+
+static void ImGui_ImplDX11_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
 }
 
 //-----------------------------------------------------------------------------

backends/imgui_impl_dx11.h

@@ -2,10 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. Win32)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -34,9 +34,6 @@ IMGUI_IMPL_API void     ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data);
 IMGUI_IMPL_API bool     ImGui_ImplDX11_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplDX11_InvalidateDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplDX11_UpdateTexture(ImTextureData* tex);
-
 // [BETA] Selected render state data shared with callbacks.
 // This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplDX11_RenderDrawData() call.
 // (Please open an issue if you feel you need access to more data)
@@ -44,9 +41,8 @@ struct ImGui_ImplDX11_RenderState
 {
     ID3D11Device*           Device;
     ID3D11DeviceContext*    DeviceContext;
+    ID3D11SamplerState*     SamplerDefault;
     ID3D11Buffer*           VertexConstantBuffer;
-    //ID3D11SamplerState*   SamplerLinear;          // Use ImDrawList::AddCallback(ImGui::GetPlatform().DrawCallback_SetSamplerLinear)
-    //ID3D11SamplerState*   SamplerNearest;         // Use ImDrawList::AddCallback(ImGui::GetPlatform().DrawCallback_SetSamplerNearest)
 };
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_dx12.h

@@ -2,10 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. Win32)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'D3D12_GPU_DESCRIPTOR_HANDLE' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'D3D12_GPU_DESCRIPTOR_HANDLE' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // The aim of imgui_impl_dx12.h/.cpp is to be usable in your engine without any modification.
 // IF YOU FEEL YOU NEED TO MAKE ANY CHANGE TO THIS CODE, please share them and your feedback at https://github.com/ocornut/imgui/
@@ -24,24 +24,18 @@
 #include <dxgiformat.h> // DXGI_FORMAT
 #include <d3d12.h>      // D3D12_CPU_DESCRIPTOR_HANDLE
 
-// Clang/GCC warnings with -Weverything
-#if defined(__clang__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wold-style-cast" // warning: use of old-style cast
-#endif
-
 // Initialization data, for ImGui_ImplDX12_Init()
 struct ImGui_ImplDX12_InitInfo
 {
     ID3D12Device*               Device;
-    ID3D12CommandQueue*         CommandQueue;       // Command queue used for queuing texture uploads.
+    ID3D12CommandQueue*         CommandQueue;
     int                         NumFramesInFlight;
     DXGI_FORMAT                 RTVFormat;          // RenderTarget format.
     DXGI_FORMAT                 DSVFormat;          // DepthStencilView format.
     void*                       UserData;
 
     // Allocating SRV descriptors for textures is up to the application, so we provide callbacks.
-    // (current version of the backend will only allocate one descriptor, from 1.92 the backend will need to allocate more)
+    // (current version of the backend will only allocate one descriptor, future versions will need to allocate more)
     ID3D12DescriptorHeap*       SrvDescriptorHeap;
     void                        (*SrvDescriptorAllocFn)(ImGui_ImplDX12_InitInfo* info, D3D12_CPU_DESCRIPTOR_HANDLE* out_cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE* out_gpu_desc_handle);
     void                        (*SrvDescriptorFreeFn)(ImGui_ImplDX12_InitInfo* info, D3D12_CPU_DESCRIPTOR_HANDLE cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE gpu_desc_handle);
@@ -61,8 +55,7 @@ IMGUI_IMPL_API void     ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3
 
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
 // Legacy initialization API Obsoleted in 1.91.5
-// - font_srv_cpu_desc_handle and font_srv_gpu_desc_handle are handles to a single SRV descriptor to use for the internal font texture, they must be in 'srv_descriptor_heap'
-// - When we introduced the ImGui_ImplDX12_InitInfo struct we also added a 'ID3D12CommandQueue* CommandQueue' field.
+// font_srv_cpu_desc_handle and font_srv_gpu_desc_handle are handles to a single SRV descriptor to use for the internal font texture, they must be in 'srv_descriptor_heap'
 IMGUI_IMPL_API bool     ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FORMAT rtv_format, ID3D12DescriptorHeap* srv_descriptor_heap, D3D12_CPU_DESCRIPTOR_HANDLE font_srv_cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE font_srv_gpu_desc_handle);
 #endif
 
@@ -70,9 +63,6 @@ IMGUI_IMPL_API bool     ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames
 IMGUI_IMPL_API bool     ImGui_ImplDX12_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplDX12_InvalidateDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplDX12_UpdateTexture(ImTextureData* tex);
-
 // [BETA] Selected render state data shared with callbacks.
 // This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplDX12_RenderDrawData() call.
 // (Please open an issue if you feel you need access to more data)
@@ -82,8 +72,4 @@ struct ImGui_ImplDX12_RenderState
     ID3D12GraphicsCommandList*  CommandList;
 };
 
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_dx9.cpp

@@ -2,10 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. Win32)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: IMGUI_USE_BGRA_PACKED_COLOR support, as this is the optimal color encoding for DirectX9.
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -17,10 +17,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
-//  2026-03-19: Fixed issue in ImGui_ImplDX9_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295, #9310)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-06-11: DirectX9: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas.
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2024-10-07: DirectX9: Changed default texture sampler to Clamp instead of Repeat/Wrap.
 //  2024-02-12: DirectX9: Using RGBA format when supported by the driver to avoid CPU side conversion. (#6575)
 //  2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
@@ -49,18 +46,13 @@
 // DirectX
 #include <d3d9.h>
 
-// Clang/GCC warnings with -Weverything
-#if defined(__clang__)
-#pragma clang diagnostic ignored "-Wold-style-cast"         // warning: use of old-style cast                            // yes, they are more terse.
-#pragma clang diagnostic ignored "-Wsign-conversion"        // warning: implicit conversion changes signedness
-#endif
-
 // DirectX data
 struct ImGui_ImplDX9_Data
 {
     LPDIRECT3DDEVICE9           pd3dDevice;
     LPDIRECT3DVERTEXBUFFER9     pVB;
     LPDIRECT3DINDEXBUFFER9      pIB;
+    LPDIRECT3DTEXTURE9          FontTexture;
     int                         VertexBufferSize;
     int                         IndexBufferSize;
     bool                        HasRgbaSupport;
@@ -89,6 +81,12 @@ static ImGui_ImplDX9_Data* ImGui_ImplDX9_GetBackendData()
     return ImGui::GetCurrentContext() ? (ImGui_ImplDX9_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
 }
 
+// Forward Declarations
+static void ImGui_ImplDX9_InitMultiViewportSupport();
+static void ImGui_ImplDX9_ShutdownMultiViewportSupport();
+static void ImGui_ImplDX9_CreateDeviceObjectsForPlatformWindows();
+static void ImGui_ImplDX9_InvalidateDeviceObjectsForPlatformWindows();
+
 // Functions
 static void ImGui_ImplDX9_SetupRenderState(ImDrawData* draw_data)
 {
@@ -163,11 +161,6 @@ static void ImGui_ImplDX9_SetupRenderState(ImDrawData* draw_data)
     }
 }
 
-// Draw callbacks
-static void ImGui_ImplDX9_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)    {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplDX9_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)    { ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData(); bd->pd3dDevice->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR); bd->pd3dDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR); }
-static void ImGui_ImplDX9_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)   { ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData(); bd->pd3dDevice->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_POINT); bd->pd3dDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_POINT); }
-
 // Render function.
 void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
 {
@@ -178,26 +171,19 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
     ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
     LPDIRECT3DDEVICE9 device = bd->pd3dDevice;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplDX9_UpdateTexture(tex);
-
     // Create and grow buffers if needed
     if (!bd->pVB || bd->VertexBufferSize < draw_data->TotalVtxCount)
     {
         if (bd->pVB) { bd->pVB->Release(); bd->pVB = nullptr; }
         bd->VertexBufferSize = draw_data->TotalVtxCount + 5000;
-        if (device->CreateVertexBuffer((UINT)bd->VertexBufferSize * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &bd->pVB, nullptr) < 0)
+        if (device->CreateVertexBuffer(bd->VertexBufferSize * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &bd->pVB, nullptr) < 0)
             return;
     }
     if (!bd->pIB || bd->IndexBufferSize < draw_data->TotalIdxCount)
     {
         if (bd->pIB) { bd->pIB->Release(); bd->pIB = nullptr; }
         bd->IndexBufferSize = draw_data->TotalIdxCount + 10000;
-        if (device->CreateIndexBuffer((UINT)bd->IndexBufferSize * sizeof(ImDrawIdx), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, sizeof(ImDrawIdx) == 2 ? D3DFMT_INDEX16 : D3DFMT_INDEX32, D3DPOOL_DEFAULT, &bd->pIB, nullptr) < 0)
+        if (device->CreateIndexBuffer(bd->IndexBufferSize * sizeof(ImDrawIdx), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, sizeof(ImDrawIdx) == 2 ? D3DFMT_INDEX16 : D3DFMT_INDEX32, D3DPOOL_DEFAULT, &bd->pIB, nullptr) < 0)
             return;
     }
 
@@ -236,8 +222,9 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
     // FIXME-OPT: This is a minor waste of resource, the ideal is to use imconfig.h and
     //  1) to avoid repacking colors:   #define IMGUI_USE_BGRA_PACKED_COLOR
     //  2) to avoid repacking vertices: #define IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT struct ImDrawVert { ImVec2 pos; float z; ImU32 col; ImVec2 uv; }
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         const ImDrawVert* vtx_src = draw_list->VtxBuffer.Data;
         for (int i = 0; i < draw_list->VtxBuffer.Size; i++)
         {
@@ -267,15 +254,17 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
     int global_vtx_offset = 0;
     int global_idx_offset = 0;
     ImVec2 clip_off = draw_data->DisplayPos;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback != nullptr)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplDX9_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplDX9_SetupRenderState(draw_data);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -302,6 +291,11 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
         global_vtx_offset += draw_list->VtxBuffer.Size;
     }
 
+    // When using multi-viewports, it appears that there's an odd logic in DirectX9 which prevent subsequent windows
+    // from rendering until the first window submits at least one draw call, even once. That's our workaround. (see #2560)
+    if (global_vtx_offset == 0)
+        bd->pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, 0, 0, 0);
+
     // Restore the DX9 transform
     device->SetTransform(D3DTS_WORLD, &last_world);
     device->SetTransform(D3DTS_VIEW, &last_view);
@@ -330,119 +324,6 @@ static bool ImGui_ImplDX9_CheckFormatSupport(LPDIRECT3DDEVICE9 pDevice, D3DFORMA
     return support;
 }
 
-// Convert RGBA32 to BGRA32 (because RGBA32 is not well supported by DX9 devices)
-static void ImGui_ImplDX9_CopyTextureRegion(bool tex_use_colors, const ImU32* src, int src_pitch, ImU32* dst, int dst_pitch, int w, int h)
-{
-#ifndef IMGUI_USE_BGRA_PACKED_COLOR
-    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
-    const bool convert_rgba_to_bgra = (!bd->HasRgbaSupport && tex_use_colors);
-#else
-    const bool convert_rgba_to_bgra = false;
-    IM_UNUSED(tex_use_colors);
-#endif
-    for (int y = 0; y < h; y++)
-    {
-        const ImU32* src_p = (const ImU32*)(const void*)((const unsigned char*)src + src_pitch * y);
-        ImU32* dst_p = (ImU32*)(void*)((unsigned char*)dst + dst_pitch * y);
-        if (convert_rgba_to_bgra)
-            for (int x = w; x > 0; x--, src_p++, dst_p++) // Convert copy
-                *dst_p = IMGUI_COL_TO_DX9_ARGB(*src_p);
-        else
-            memcpy(dst_p, src_p, w * 4); // Raw copy
-    }
-}
-
-void ImGui_ImplDX9_UpdateTexture(ImTextureData* tex)
-{
-    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
-
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-        LPDIRECT3DTEXTURE9 dx_tex = nullptr;
-        HRESULT hr = bd->pd3dDevice->CreateTexture(tex->Width, tex->Height, 1, D3DUSAGE_DYNAMIC, bd->HasRgbaSupport ? D3DFMT_A8B8G8R8 : D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &dx_tex, nullptr);
-        if (hr < 0)
-        {
-            IM_ASSERT(hr >= 0 && "Backend failed to create texture!");
-            return;
-        }
-
-        D3DLOCKED_RECT locked_rect;
-        if (dx_tex->LockRect(0, &locked_rect, nullptr, 0) == D3D_OK)
-        {
-            ImGui_ImplDX9_CopyTextureRegion(tex->UseColors, (ImU32*)tex->GetPixels(), tex->Width * 4, (ImU32*)locked_rect.pBits, (ImU32)locked_rect.Pitch, tex->Width, tex->Height);
-            dx_tex->UnlockRect(0);
-        }
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)dx_tex);
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        LPDIRECT3DTEXTURE9 backend_tex = (LPDIRECT3DTEXTURE9)(intptr_t)tex->TexID;
-        RECT update_rect = { (LONG)tex->UpdateRect.x, (LONG)tex->UpdateRect.y, (LONG)(tex->UpdateRect.x + tex->UpdateRect.w), (LONG)(tex->UpdateRect.y + tex->UpdateRect.h) };
-        D3DLOCKED_RECT locked_rect;
-        if (backend_tex->LockRect(0, &locked_rect, &update_rect, 0) == D3D_OK)
-            for (ImTextureRect& r : tex->Updates)
-                ImGui_ImplDX9_CopyTextureRegion(tex->UseColors, (ImU32*)tex->GetPixelsAt(r.x, r.y), tex->Width * 4,
-                    (ImU32*)locked_rect.pBits + (r.x - update_rect.left) + (r.y - update_rect.top) * (locked_rect.Pitch / 4), (int)locked_rect.Pitch, r.w, r.h);
-        backend_tex->UnlockRect(0);
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantDestroy)
-    {
-        if (tex->TexID != ImTextureID_Invalid)
-            if (LPDIRECT3DTEXTURE9 backend_tex = (LPDIRECT3DTEXTURE9)tex->TexID)
-            {
-                IM_ASSERT(tex->TexID == (ImTextureID)(intptr_t)backend_tex);
-                backend_tex->Release();
-
-                // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-                tex->SetTexID(ImTextureID_Invalid);
-            }
-        tex->SetStatus(ImTextureStatus_Destroyed);
-    }
-}
-
-bool ImGui_ImplDX9_CreateDeviceObjects()
-{
-    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
-    if (!bd || !bd->pd3dDevice)
-        return false;
-    return true;
-}
-
-void ImGui_ImplDX9_InvalidateDeviceObjects()
-{
-    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
-    if (!bd || !bd->pd3dDevice)
-        return;
-
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-        {
-            tex->SetStatus(ImTextureStatus_WantDestroy);
-            ImGui_ImplDX9_UpdateTexture(tex);
-        }
-    if (bd->pVB) { bd->pVB->Release(); bd->pVB = nullptr; }
-    if (bd->pIB) { bd->pIB->Release(); bd->pIB = nullptr; }
-}
-
-void ImGui_ImplDX9_NewFrame()
-{
-    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
-    IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplDX9_Init()?");
-    IM_UNUSED(bd);
-}
-
-
 bool ImGui_ImplDX9_Init(IDirect3DDevice9* device)
 {
     ImGuiIO& io = ImGui::GetIO();
@@ -454,18 +335,14 @@ bool ImGui_ImplDX9_Init(IDirect3DDevice9* device)
     io.BackendRendererUserData = (void*)bd;
     io.BackendRendererName = "imgui_impl_dx9";
     io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
-
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = 4096;
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplDX9_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplDX9_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplDX9_DrawCallback_SetSamplerNearest;
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;  // We can create multi-viewports on the Renderer side (optional)
 
     bd->pd3dDevice = device;
     bd->pd3dDevice->AddRef();
     bd->HasRgbaSupport = ImGui_ImplDX9_CheckFormatSupport(bd->pd3dDevice, D3DFMT_A8B8G8R8);
 
+    ImGui_ImplDX9_InitMultiViewportSupport();
+
     return true;
 }
 
@@ -474,18 +351,235 @@ void ImGui_ImplDX9_Shutdown()
     ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
     IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 
+    ImGui_ImplDX9_ShutdownMultiViewportSupport();
     ImGui_ImplDX9_InvalidateDeviceObjects();
     if (bd->pd3dDevice) { bd->pd3dDevice->Release(); }
-
     io.BackendRendererName = nullptr;
     io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
+    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasViewports);
     IM_DELETE(bd);
 }
 
+// Convert RGBA32 to BGRA32 (because RGBA32 is not well supported by DX9 devices)
+static void ImGui_ImplDX9_CopyTextureRegion(bool tex_use_colors, ImU32* src, int src_pitch, ImU32* dst, int dst_pitch, int w, int h)
+{
+#ifndef IMGUI_USE_BGRA_PACKED_COLOR
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    const bool convert_rgba_to_bgra = (!bd->HasRgbaSupport && tex_use_colors);
+#else
+    const bool convert_rgba_to_bgra = false;
+    IM_UNUSED(tex_use_colors);
+#endif
+    for (int y = 0; y < h; y++)
+    {
+        ImU32* src_p = (ImU32*)((unsigned char*)src + src_pitch * y);
+        ImU32* dst_p = (ImU32*)((unsigned char*)dst + dst_pitch * y);
+        if (convert_rgba_to_bgra)
+            for (int x = w; x > 0; x--, src_p++, dst_p++) // Convert copy
+                *dst_p = IMGUI_COL_TO_DX9_ARGB(*src_p);
+        else
+            memcpy(dst_p, src_p, w * 4); // Raw copy
+    }
+}
+
+static bool ImGui_ImplDX9_CreateFontsTexture()
+{
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    unsigned char* pixels;
+    int width, height, bytes_per_pixel;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height, &bytes_per_pixel);
+
+    // Upload texture to graphics system
+    bd->FontTexture = nullptr;
+    if (bd->pd3dDevice->CreateTexture(width, height, 1, D3DUSAGE_DYNAMIC, bd->HasRgbaSupport ? D3DFMT_A8B8G8R8 : D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &bd->FontTexture, nullptr) < 0)
+        return false;
+    D3DLOCKED_RECT tex_locked_rect;
+    if (bd->FontTexture->LockRect(0, &tex_locked_rect, nullptr, 0) != D3D_OK)
+        return false;
+    ImGui_ImplDX9_CopyTextureRegion(io.Fonts->TexPixelsUseColors, (ImU32*)pixels, width * bytes_per_pixel, (ImU32*)tex_locked_rect.pBits, (int)tex_locked_rect.Pitch, width, height);
+    bd->FontTexture->UnlockRect(0);
+
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)bd->FontTexture);
+    return true;
+}
+
+bool ImGui_ImplDX9_CreateDeviceObjects()
+{
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    if (!bd || !bd->pd3dDevice)
+        return false;
+    if (!ImGui_ImplDX9_CreateFontsTexture())
+        return false;
+    ImGui_ImplDX9_CreateDeviceObjectsForPlatformWindows();
+    return true;
+}
+
+void ImGui_ImplDX9_InvalidateDeviceObjects()
+{
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    if (!bd || !bd->pd3dDevice)
+        return;
+    if (bd->pVB) { bd->pVB->Release(); bd->pVB = nullptr; }
+    if (bd->pIB) { bd->pIB->Release(); bd->pIB = nullptr; }
+    if (bd->FontTexture) { bd->FontTexture->Release(); bd->FontTexture = nullptr; ImGui::GetIO().Fonts->SetTexID(0); } // We copied bd->pFontTextureView to io.Fonts->TexID so let's clear that as well.
+    ImGui_ImplDX9_InvalidateDeviceObjectsForPlatformWindows();
+}
+
+void ImGui_ImplDX9_NewFrame()
+{
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplDX9_Init()?");
+
+    if (!bd->FontTexture)
+        ImGui_ImplDX9_CreateDeviceObjects();
+}
+
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+// Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
+struct ImGui_ImplDX9_ViewportData
+{
+    IDirect3DSwapChain9*    SwapChain;
+    D3DPRESENT_PARAMETERS   d3dpp;
+
+    ImGui_ImplDX9_ViewportData()  { SwapChain = nullptr; ZeroMemory(&d3dpp, sizeof(D3DPRESENT_PARAMETERS)); }
+    ~ImGui_ImplDX9_ViewportData() { IM_ASSERT(SwapChain == nullptr); }
+};
+
+static void ImGui_ImplDX9_CreateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    ImGui_ImplDX9_ViewportData* vd = IM_NEW(ImGui_ImplDX9_ViewportData)();
+    viewport->RendererUserData = vd;
+
+    // PlatformHandleRaw should always be a HWND, whereas PlatformHandle might be a higher-level handle (e.g. GLFWWindow*, SDL_Window*).
+    // Some backends will leave PlatformHandleRaw == 0, in which case we assume PlatformHandle will contain the HWND.
+    HWND hwnd = viewport->PlatformHandleRaw ? (HWND)viewport->PlatformHandleRaw : (HWND)viewport->PlatformHandle;
+    IM_ASSERT(hwnd != 0);
+
+    ZeroMemory(&vd->d3dpp, sizeof(D3DPRESENT_PARAMETERS));
+    vd->d3dpp.Windowed = TRUE;
+    vd->d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
+    vd->d3dpp.BackBufferWidth = (UINT)viewport->Size.x;
+    vd->d3dpp.BackBufferHeight = (UINT)viewport->Size.y;
+    vd->d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
+    vd->d3dpp.hDeviceWindow = hwnd;
+    vd->d3dpp.EnableAutoDepthStencil = FALSE;
+    vd->d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
+    vd->d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;   // Present without vsync
+
+    HRESULT hr = bd->pd3dDevice->CreateAdditionalSwapChain(&vd->d3dpp, &vd->SwapChain); IM_UNUSED(hr);
+    IM_ASSERT(hr == D3D_OK);
+    IM_ASSERT(vd->SwapChain != nullptr);
+}
+
+static void ImGui_ImplDX9_DestroyWindow(ImGuiViewport* viewport)
+{
+    // The main viewport (owned by the application) will always have RendererUserData == 0 since we didn't create the data for it.
+    if (ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData)
+    {
+        if (vd->SwapChain)
+            vd->SwapChain->Release();
+        vd->SwapChain = nullptr;
+        ZeroMemory(&vd->d3dpp, sizeof(D3DPRESENT_PARAMETERS));
+        IM_DELETE(vd);
+    }
+    viewport->RendererUserData = nullptr;
+}
+
+static void ImGui_ImplDX9_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData;
+    if (vd->SwapChain)
+    {
+        vd->SwapChain->Release();
+        vd->SwapChain = nullptr;
+        vd->d3dpp.BackBufferWidth = (UINT)size.x;
+        vd->d3dpp.BackBufferHeight = (UINT)size.y;
+        HRESULT hr = bd->pd3dDevice->CreateAdditionalSwapChain(&vd->d3dpp, &vd->SwapChain); IM_UNUSED(hr);
+        IM_ASSERT(hr == D3D_OK);
+    }
+}
+
+static void ImGui_ImplDX9_RenderWindow(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
+    ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData;
+    ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);
+
+    LPDIRECT3DSURFACE9 render_target = nullptr;
+    LPDIRECT3DSURFACE9 last_render_target = nullptr;
+    LPDIRECT3DSURFACE9 last_depth_stencil = nullptr;
+    vd->SwapChain->GetBackBuffer(0, D3DBACKBUFFER_TYPE_MONO, &render_target);
+    bd->pd3dDevice->GetRenderTarget(0, &last_render_target);
+    bd->pd3dDevice->GetDepthStencilSurface(&last_depth_stencil);
+    bd->pd3dDevice->SetRenderTarget(0, render_target);
+    bd->pd3dDevice->SetDepthStencilSurface(nullptr);
+
+    if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
+    {
+        D3DCOLOR clear_col_dx = D3DCOLOR_RGBA((int)(clear_color.x*255.0f), (int)(clear_color.y*255.0f), (int)(clear_color.z*255.0f), (int)(clear_color.w*255.0f));
+        bd->pd3dDevice->Clear(0, nullptr, D3DCLEAR_TARGET, clear_col_dx, 1.0f, 0);
+    }
+
+    ImGui_ImplDX9_RenderDrawData(viewport->DrawData);
+
+    // Restore render target
+    bd->pd3dDevice->SetRenderTarget(0, last_render_target);
+    bd->pd3dDevice->SetDepthStencilSurface(last_depth_stencil);
+    render_target->Release();
+    last_render_target->Release();
+    if (last_depth_stencil) last_depth_stencil->Release();
+}
+
+static void ImGui_ImplDX9_SwapBuffers(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData;
+    HRESULT hr = vd->SwapChain->Present(nullptr, nullptr, vd->d3dpp.hDeviceWindow, nullptr, 0);
+    // Let main application handle D3DERR_DEVICELOST by resetting the device.
+    IM_ASSERT(SUCCEEDED(hr) || hr == D3DERR_DEVICELOST);
+}
+
+static void ImGui_ImplDX9_InitMultiViewportSupport()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Renderer_CreateWindow = ImGui_ImplDX9_CreateWindow;
+    platform_io.Renderer_DestroyWindow = ImGui_ImplDX9_DestroyWindow;
+    platform_io.Renderer_SetWindowSize = ImGui_ImplDX9_SetWindowSize;
+    platform_io.Renderer_RenderWindow = ImGui_ImplDX9_RenderWindow;
+    platform_io.Renderer_SwapBuffers = ImGui_ImplDX9_SwapBuffers;
+}
+
+static void ImGui_ImplDX9_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
+}
+
+static void ImGui_ImplDX9_CreateDeviceObjectsForPlatformWindows()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    for (int i = 1; i < platform_io.Viewports.Size; i++)
+        if (!platform_io.Viewports[i]->RendererUserData)
+            ImGui_ImplDX9_CreateWindow(platform_io.Viewports[i]);
+}
+
+static void ImGui_ImplDX9_InvalidateDeviceObjectsForPlatformWindows()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    for (int i = 1; i < platform_io.Viewports.Size; i++)
+        if (platform_io.Viewports[i]->RendererUserData)
+            ImGui_ImplDX9_DestroyWindow(platform_io.Viewports[i]);
+}
+
 //-----------------------------------------------------------------------------
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_dx9.h

@@ -2,10 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. Win32)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: IMGUI_USE_BGRA_PACKED_COLOR support, as this is the optimal color encoding for DirectX9.
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -31,7 +31,4 @@ IMGUI_IMPL_API void     ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data);
 IMGUI_IMPL_API bool     ImGui_ImplDX9_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplDX9_InvalidateDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplDX9_UpdateTexture(ImTextureData* tex);
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_glfw.h

@@ -1,18 +1,17 @@
 // dear imgui: Platform Backend for GLFW
 // This needs to be used along with a Renderer (e.g. OpenGL3, Vulkan, WebGPU..)
 // (Info: GLFW is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan graphics context creation, etc.)
-// (Requires: GLFW 3.0+. Prefer GLFW 3.3+/3.4+ for full feature support.)
+// (Requires: GLFW 3.1+. Prefer GLFW 3.3+ for full feature support.)
 
 // Implemented features:
 //  [X] Platform: Clipboard support.
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen/Pen (Windows only).
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy GLFW_KEY_* values are obsolete since 1.87 and not supported since 1.91.5]
 //  [X] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
-//  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors) with GLFW 3.1+. Resizing cursors requires GLFW 3.4+! Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
-//  [X] Multiple Dear ImGui contexts support.
+//  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Resizing cursors requires GLFW 3.4+! Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+//  [X] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 // Missing features or Issues:
-//  [ ] Platform: Touch events are only correctly identified as Touch on Windows. This create issues with some interactions. GLFW doesn't provide a way to identify touch inputs from mouse inputs, we cannot call io.AddMouseSourceEvent() to identify the source. We provide a Windows-specific workaround.
-//  [ ] Platform: Missing ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress cursors.
+//  [ ] Platform: Multi-viewport: ParentViewportID not honored, and so io.ConfigViewportsNoDefaultParent has no effect (minor).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -48,7 +47,7 @@ IMGUI_IMPL_API void     ImGui_ImplGlfw_InstallEmscriptenCallbacks(GLFWwindow* wi
 IMGUI_IMPL_API void     ImGui_ImplGlfw_InstallCallbacks(GLFWwindow* window);
 IMGUI_IMPL_API void     ImGui_ImplGlfw_RestoreCallbacks(GLFWwindow* window);
 
-// GLFW callbacks options:
+// GFLW callbacks options:
 // - Set 'chain_for_all_windows=true' to enable chaining callbacks for all windows (including secondary viewports created by backends or by user)
 IMGUI_IMPL_API void     ImGui_ImplGlfw_SetCallbacksChainForAllWindows(bool chain_for_all_windows);
 
@@ -64,8 +63,5 @@ IMGUI_IMPL_API void     ImGui_ImplGlfw_MonitorCallback(GLFWmonitor* monitor, int
 
 // GLFW helpers
 IMGUI_IMPL_API void     ImGui_ImplGlfw_Sleep(int milliseconds);
-IMGUI_IMPL_API float    ImGui_ImplGlfw_GetContentScaleForWindow(GLFWwindow* window);
-IMGUI_IMPL_API float    ImGui_ImplGlfw_GetContentScaleForMonitor(GLFWmonitor* monitor);
-
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_glut.cpp

@@ -13,6 +13,7 @@
 //  [ ] Platform: Missing mouse cursor shape/visibility support.
 //  [ ] Platform: Missing clipboard support (not supported by Glut).
 //  [ ] Platform: Missing gamepad support.
+//  [ ] Platform: Missing multi-viewport support (multiple windows).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -50,7 +51,7 @@
 
 static int g_Time = 0;          // Current time, in milliseconds
 
-// Glut has one function for characters and one for "special keys". We map the characters in the 0..255 range and the keys above.
+// Glut has 1 function for characters and one for "special keys". We map the characters in the 0..255 range and the keys above.
 static ImGuiKey ImGui_ImplGLUT_KeyToImGuiKey(int key)
 {
     switch (key)

backends/imgui_impl_glut.h

@@ -13,6 +13,7 @@
 //  [ ] Platform: Missing mouse cursor shape/visibility support.
 //  [ ] Platform: Missing clipboard support (not supported by Glut).
 //  [ ] Platform: Missing gamepad support.
+//  [ ] Platform: Missing multi-viewport support (multiple windows).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.

backends/imgui_impl_metal.h

@@ -2,11 +2,9 @@
 // This needs to be used along with a Platform Backend (e.g. OSX)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'MTLTexture' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'MTLTexture' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
-// Missing features or Issues:
-//  [ ] Renderer: Missing support for DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest callbacks.
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -16,7 +14,6 @@
 // - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
 // - Introduction, links and more at the top of imgui.cpp
 
-#pragma once
 #include "imgui.h"      // IMGUI_IMPL_API
 #ifndef IMGUI_DISABLE
 
@@ -38,12 +35,11 @@ IMGUI_IMPL_API void ImGui_ImplMetal_RenderDrawData(ImDrawData* drawData,
                                                    id<MTLRenderCommandEncoder> commandEncoder);
 
 // Called by Init/NewFrame/Shutdown
+IMGUI_IMPL_API bool ImGui_ImplMetal_CreateFontsTexture(id<MTLDevice> device);
+IMGUI_IMPL_API void ImGui_ImplMetal_DestroyFontsTexture();
 IMGUI_IMPL_API bool ImGui_ImplMetal_CreateDeviceObjects(id<MTLDevice> device);
 IMGUI_IMPL_API void ImGui_ImplMetal_DestroyDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void ImGui_ImplMetal_UpdateTexture(ImTextureData* tex);
-
 #endif
 
 //-----------------------------------------------------------------------------
@@ -66,12 +62,11 @@ IMGUI_IMPL_API void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data,
                                                    MTL::RenderCommandEncoder* commandEncoder);
 
 // Called by Init/NewFrame/Shutdown
+IMGUI_IMPL_API bool ImGui_ImplMetal_CreateFontsTexture(MTL::Device* device);
+IMGUI_IMPL_API void ImGui_ImplMetal_DestroyFontsTexture();
 IMGUI_IMPL_API bool ImGui_ImplMetal_CreateDeviceObjects(MTL::Device* device);
 IMGUI_IMPL_API void ImGui_ImplMetal_DestroyDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void ImGui_ImplMetal_UpdateTexture(ImTextureData* tex);
-
 #endif
 #endif
 

backends/imgui_impl_metal.mm

@@ -2,11 +2,9 @@
 // This needs to be used along with a Platform Backend (e.g. OSX)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'MTLTexture' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'MTLTexture' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
-// Missing features or Issues:
-//  [ ] Renderer: Missing support for DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest callbacks.
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -18,13 +16,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState (others are not yet supported). (#9378)
-//  2026-04-14: Metal: use a dedicated bufferCacheLock to avoid crashing when bufferCache is replaced by a new object while being used for @synchronize(). (#9367)
-//  2026-04-03: Metal: avoid redundant vertex buffer bind in SetupRenderState. (#9343)
-//  2026-03-19: Fixed issue in ImGui_ImplMetal_RenderDrawData() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295, #9310)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-06-11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplMetal_CreateFontsTexture() and ImGui_ImplMetal_DestroyFontsTexture().
-//  2025-02-03: Metal: Crash fix. (#8367)
+//  2025-XX-XX: Metal: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2025-01-08: Metal: Fixed memory leaks when using metal-cpp (#8276, #8166) or when using multiple contexts (#7419).
 //  2022-08-23: Metal: Update deprecated property 'sampleCount'->'rasterSampleCount'.
 //  2022-07-05: Metal: Add dispatch synchronization.
@@ -49,6 +41,12 @@
 #import <time.h>
 #import <Metal/Metal.h>
 
+// Forward Declarations
+static void ImGui_ImplMetal_InitMultiViewportSupport();
+static void ImGui_ImplMetal_ShutdownMultiViewportSupport();
+static void ImGui_ImplMetal_CreateDeviceObjectsForPlatformWindows();
+static void ImGui_ImplMetal_InvalidateDeviceObjectsForPlatformWindows();
+
 #pragma mark - Support classes
 
 // A wrapper around a MTLBuffer object that knows the last time it was reused
@@ -68,11 +66,6 @@
 - (instancetype)initWithRenderPassDescriptor:(MTLRenderPassDescriptor*)renderPassDescriptor;
 @end
 
-@interface MetalTexture : NSObject
-@property (nonatomic, strong) id<MTLTexture> metalTexture;
-- (instancetype)initWithTexture:(id<MTLTexture>)metalTexture;
-@end
-
 // A singleton that stores long-lived objects that are needed by the Metal
 // renderer backend. Stores the render pipeline state cache and the default
 // font texture, and manages the reusable buffer cache.
@@ -81,8 +74,8 @@
 @property (nonatomic, strong) id<MTLDepthStencilState>      depthStencilState;
 @property (nonatomic, strong) FramebufferDescriptor*        framebufferDescriptor; // framebuffer descriptor for current frame; transient
 @property (nonatomic, strong) NSMutableDictionary*          renderPipelineStateCache; // pipeline cache; keyed on framebuffer descriptors
+@property (nonatomic, strong, nullable) id<MTLTexture>      fontTexture;
 @property (nonatomic, strong) NSMutableArray<MetalBuffer*>* bufferCache;
-@property (nonatomic, strong) NSObject*                     bufferCacheLock;
 @property (nonatomic, assign) double                        lastBufferCachePurge;
 - (MetalBuffer*)dequeueReusableBufferOfLength:(NSUInteger)length device:(id<MTLDevice>)device;
 - (id<MTLRenderPipelineState>)renderPipelineStateForFramebufferDescriptor:(FramebufferDescriptor*)descriptor device:(id<MTLDevice>)device;
@@ -124,6 +117,11 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data,
 
 }
 
+bool ImGui_ImplMetal_CreateFontsTexture(MTL::Device* device)
+{
+    return ImGui_ImplMetal_CreateFontsTexture((__bridge id<MTLDevice>)(device));
+}
+
 bool ImGui_ImplMetal_CreateDeviceObjects(MTL::Device* device)
 {
     return ImGui_ImplMetal_CreateDeviceObjects((__bridge id<MTLDevice>)(device));
@@ -133,6 +131,41 @@ bool ImGui_ImplMetal_CreateDeviceObjects(MTL::Device* device)
 
 #pragma mark - Dear ImGui Metal Backend API
 
+bool ImGui_ImplMetal_Init(id<MTLDevice> device)
+{
+    ImGuiIO& io = ImGui::GetIO();
+    IMGUI_CHECKVERSION();
+    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
+
+    ImGui_ImplMetal_Data* bd = IM_NEW(ImGui_ImplMetal_Data)();
+    io.BackendRendererUserData = (void*)bd;
+    io.BackendRendererName = "imgui_impl_metal";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;  // We can create multi-viewports on the Renderer side (optional)
+
+    bd->SharedMetalContext = [[MetalContext alloc] init];
+    bd->SharedMetalContext.device = device;
+
+    ImGui_ImplMetal_InitMultiViewportSupport();
+
+    return true;
+}
+
+void ImGui_ImplMetal_Shutdown()
+{
+    ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
+    IM_UNUSED(bd);
+    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
+    ImGui_ImplMetal_ShutdownMultiViewportSupport();
+    ImGui_ImplMetal_DestroyDeviceObjects();
+    ImGui_ImplMetal_DestroyBackendData();
+
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendRendererName = nullptr;
+    io.BackendRendererUserData = nullptr;
+    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasViewports);
+}
+
 void ImGui_ImplMetal_NewFrame(MTLRenderPassDescriptor* renderPassDescriptor)
 {
     ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
@@ -146,7 +179,7 @@ void ImGui_ImplMetal_NewFrame(MTLRenderPassDescriptor* renderPassDescriptor)
         ImGui_ImplMetal_CreateDeviceObjects(bd->SharedMetalContext.device);
 }
 
-static void ImGui_ImplMetal_SetupRenderState(ImDrawData* draw_data, id<MTLCommandBuffer> commandBuffer,
+static void ImGui_ImplMetal_SetupRenderState(ImDrawData* drawData, id<MTLCommandBuffer> commandBuffer,
     id<MTLRenderCommandEncoder> commandEncoder, id<MTLRenderPipelineState> renderPipelineState,
     MetalBuffer* vertexBuffer, size_t vertexBufferOffset)
 {
@@ -162,17 +195,17 @@ static void ImGui_ImplMetal_SetupRenderState(ImDrawData* draw_data, id<MTLComman
     {
         .originX = 0.0,
         .originY = 0.0,
-        .width = (double)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x),
-        .height = (double)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y),
+        .width = (double)(drawData->DisplaySize.x * drawData->FramebufferScale.x),
+        .height = (double)(drawData->DisplaySize.y * drawData->FramebufferScale.y),
         .znear = 0.0,
         .zfar = 1.0
     };
     [commandEncoder setViewport:viewport];
 
-    float L = draw_data->DisplayPos.x;
-    float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
-    float T = draw_data->DisplayPos.y;
-    float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
+    float L = drawData->DisplayPos.x;
+    float R = drawData->DisplayPos.x + drawData->DisplaySize.x;
+    float T = drawData->DisplayPos.y;
+    float B = drawData->DisplayPos.y + drawData->DisplaySize.y;
     float N = (float)viewport.znear;
     float F = (float)viewport.zfar;
     const float ortho_projection[4][4] =
@@ -186,31 +219,22 @@ static void ImGui_ImplMetal_SetupRenderState(ImDrawData* draw_data, id<MTLComman
 
     [commandEncoder setRenderPipelineState:renderPipelineState];
 
-    [commandEncoder setVertexBuffer:vertexBuffer.buffer offset:vertexBufferOffset atIndex:0];
+    [commandEncoder setVertexBuffer:vertexBuffer.buffer offset:0 atIndex:0];
+    [commandEncoder setVertexBufferOffset:vertexBufferOffset atIndex:0];
 }
 
-// Draw callbacks
-static void ImGui_ImplMetal_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*) {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-
 // Metal Render function.
-void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer> commandBuffer, id<MTLRenderCommandEncoder> commandEncoder)
+void ImGui_ImplMetal_RenderDrawData(ImDrawData* drawData, id<MTLCommandBuffer> commandBuffer, id<MTLRenderCommandEncoder> commandEncoder)
 {
     ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
     MetalContext* ctx = bd->SharedMetalContext;
 
     // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
-    int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
-    int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
-    if (fb_width <= 0 || fb_height <= 0 || draw_data->CmdLists.Size == 0)
+    int fb_width = (int)(drawData->DisplaySize.x * drawData->FramebufferScale.x);
+    int fb_height = (int)(drawData->DisplaySize.y * drawData->FramebufferScale.y);
+    if (fb_width <= 0 || fb_height <= 0 || drawData->CmdListsCount == 0)
         return;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplMetal_UpdateTexture(tex);
-
     // Try to retrieve a render pipeline state that is compatible with the framebuffer config for this frame
     // The hit rate for this cache should be very near 100%.
     id<MTLRenderPipelineState> renderPipelineState = ctx.renderPipelineStateCache[ctx.framebufferDescriptor];
@@ -223,22 +247,24 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer>
         ctx.renderPipelineStateCache[ctx.framebufferDescriptor] = renderPipelineState;
     }
 
-    size_t vertexBufferLength = (size_t)draw_data->TotalVtxCount * sizeof(ImDrawVert);
-    size_t indexBufferLength = (size_t)draw_data->TotalIdxCount * sizeof(ImDrawIdx);
+    size_t vertexBufferLength = (size_t)drawData->TotalVtxCount * sizeof(ImDrawVert);
+    size_t indexBufferLength = (size_t)drawData->TotalIdxCount * sizeof(ImDrawIdx);
     MetalBuffer* vertexBuffer = [ctx dequeueReusableBufferOfLength:vertexBufferLength device:commandBuffer.device];
     MetalBuffer* indexBuffer = [ctx dequeueReusableBufferOfLength:indexBufferLength device:commandBuffer.device];
 
-    ImGui_ImplMetal_SetupRenderState(draw_data, commandBuffer, commandEncoder, renderPipelineState, vertexBuffer, 0);
+    ImGui_ImplMetal_SetupRenderState(drawData, commandBuffer, commandEncoder, renderPipelineState, vertexBuffer, 0);
 
     // Will project scissor/clipping rectangles into framebuffer space
-    ImVec2 clip_off = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
-    ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
+    ImVec2 clip_off = drawData->DisplayPos;         // (0,0) unless using multi-viewports
+    ImVec2 clip_scale = drawData->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
 
     // Render command lists
     size_t vertexBufferOffset = 0;
     size_t indexBufferOffset = 0;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < drawData->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = drawData->CmdLists[n];
+
         memcpy((char*)vertexBuffer.buffer.contents + vertexBufferOffset, draw_list->VtxBuffer.Data, (size_t)draw_list->VtxBuffer.Size * sizeof(ImDrawVert));
         memcpy((char*)indexBuffer.buffer.contents + indexBufferOffset, draw_list->IdxBuffer.Data, (size_t)draw_list->IdxBuffer.Size * sizeof(ImDrawIdx));
 
@@ -248,8 +274,9 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer>
             if (pcmd->UserCallback)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplMetal_DrawCallback_ResetRenderState)
-                    ImGui_ImplMetal_SetupRenderState(draw_data, commandBuffer, commandEncoder, renderPipelineState, vertexBuffer, vertexBufferOffset);
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
+                    ImGui_ImplMetal_SetupRenderState(drawData, commandBuffer, commandEncoder, renderPipelineState, vertexBuffer, vertexBufferOffset);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
             }
@@ -262,8 +289,8 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer>
                 // Clamp to viewport as setScissorRect() won't accept values that are off bounds
                 if (clip_min.x < 0.0f) { clip_min.x = 0.0f; }
                 if (clip_min.y < 0.0f) { clip_min.y = 0.0f; }
-                if (clip_max.x > (float)fb_width) { clip_max.x = (float)fb_width; }
-                if (clip_max.y > (float)fb_height) { clip_max.y = (float)fb_height; }
+                if (clip_max.x > fb_width) { clip_max.x = (float)fb_width; }
+                if (clip_max.y > fb_height) { clip_max.y = (float)fb_height; }
                 if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
                     continue;
                 if (pcmd->ElemCount == 0) // drawIndexedPrimitives() validation doesn't accept this
@@ -280,8 +307,7 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer>
                 [commandEncoder setScissorRect:scissorRect];
 
                 // Bind texture, Draw
-                ImTextureID tex_id = pcmd->GetTexID();
-                if (tex_id != ImTextureID_Invalid)
+                if (ImTextureID tex_id = pcmd->GetTexID())
                     [commandEncoder setFragmentTexture:(__bridge id<MTLTexture>)(void*)(intptr_t)(tex_id) atIndex:0];
 
                 [commandEncoder setVertexBufferOffset:(vertexBufferOffset + pcmd->VtxOffset * sizeof(ImDrawVert)) atIndex:0];
@@ -297,82 +323,55 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer>
         indexBufferOffset += (size_t)draw_list->IdxBuffer.Size * sizeof(ImDrawIdx);
     }
 
-    MetalContext* sharedMetalContext = bd->SharedMetalContext;
+    __block MetalContext* sharedMetalContext = bd->SharedMetalContext;
     [commandBuffer addCompletedHandler:^(id<MTLCommandBuffer>)
     {
-        @synchronized(sharedMetalContext.bufferCacheLock)
-        {
-            [sharedMetalContext.bufferCache addObject:vertexBuffer];
-            [sharedMetalContext.bufferCache addObject:indexBuffer];
-        }
+        dispatch_async(dispatch_get_main_queue(), ^{
+            @synchronized(bd->SharedMetalContext.bufferCache)
+            {
+                [sharedMetalContext.bufferCache addObject:vertexBuffer];
+                [sharedMetalContext.bufferCache addObject:indexBuffer];
+            }
+        });
     }];
 }
 
-static void ImGui_ImplMetal_DestroyTexture(ImTextureData* tex)
-{
-    if (MetalTexture* backend_tex = (__bridge_transfer MetalTexture*)(tex->BackendUserData))
-    {
-        IM_ASSERT(backend_tex.metalTexture == (__bridge id<MTLTexture>)(void*)(intptr_t)tex->TexID);
-        backend_tex.metalTexture = nil;
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->BackendUserData = nullptr;
-    }
-    tex->SetStatus(ImTextureStatus_Destroyed);
-}
-
-void ImGui_ImplMetal_UpdateTexture(ImTextureData* tex)
+bool ImGui_ImplMetal_CreateFontsTexture(id<MTLDevice> device)
 {
     ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
+    ImGuiIO& io = ImGui::GetIO();
 
-        // We are retrieving and uploading the font atlas as a 4-channels RGBA texture here.
-        // In theory we could call GetTexDataAsAlpha8() and upload a 1-channel texture to save on memory access bandwidth.
-        // However, using a shader designed for 1-channel texture would make it less obvious to use the ImTextureID facility to render users own textures.
-        // You can make that change in your implementation.
-        MTLTextureDescriptor* textureDescriptor = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat:MTLPixelFormatRGBA8Unorm
-                                                                                                     width:(NSUInteger)tex->Width
-                                                                                                    height:(NSUInteger)tex->Height
-                                                                                                 mipmapped:NO];
-        textureDescriptor.usage = MTLTextureUsageShaderRead;
-    #if TARGET_OS_OSX || TARGET_OS_MACCATALYST
-        textureDescriptor.storageMode = MTLStorageModeManaged;
-    #else
-        textureDescriptor.storageMode = MTLStorageModeShared;
-    #endif
-        id <MTLTexture> texture = [bd->SharedMetalContext.device newTextureWithDescriptor:textureDescriptor];
-        [texture replaceRegion:MTLRegionMake2D(0, 0, (NSUInteger)tex->Width, (NSUInteger)tex->Height) mipmapLevel:0 withBytes:tex->Pixels bytesPerRow:(NSUInteger)tex->Width * 4];
-        MetalTexture* backend_tex = [[MetalTexture alloc] initWithTexture:texture];
+    // We are retrieving and uploading the font atlas as a 4-channels RGBA texture here.
+    // In theory we could call GetTexDataAsAlpha8() and upload a 1-channel texture to save on memory access bandwidth.
+    // However, using a shader designed for 1-channel texture would make it less obvious to use the ImTextureID facility to render users own textures.
+    // You can make that change in your implementation.
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+    MTLTextureDescriptor* textureDescriptor = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat:MTLPixelFormatRGBA8Unorm
+                                                                                                 width:(NSUInteger)width
+                                                                                                height:(NSUInteger)height
+                                                                                             mipmapped:NO];
+    textureDescriptor.usage = MTLTextureUsageShaderRead;
+#if TARGET_OS_OSX || TARGET_OS_MACCATALYST
+    textureDescriptor.storageMode = MTLStorageModeManaged;
+#else
+    textureDescriptor.storageMode = MTLStorageModeShared;
+#endif
+    id <MTLTexture> texture = [device newTextureWithDescriptor:textureDescriptor];
+    [texture replaceRegion:MTLRegionMake2D(0, 0, (NSUInteger)width, (NSUInteger)height) mipmapLevel:0 withBytes:pixels bytesPerRow:(NSUInteger)width * 4];
+    bd->SharedMetalContext.fontTexture = texture;
+    io.Fonts->SetTexID((ImTextureID)(intptr_t)(__bridge void*)bd->SharedMetalContext.fontTexture); // ImTextureID == ImU64
 
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)texture);
-        tex->SetStatus(ImTextureStatus_OK);
-        tex->BackendUserData = (__bridge_retained void*)(backend_tex);
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        MetalTexture* backend_tex = (__bridge MetalTexture*)(tex->BackendUserData);
-        for (ImTextureRect& r : tex->Updates)
-        {
-            [backend_tex.metalTexture replaceRegion:MTLRegionMake2D((NSUInteger)r.x, (NSUInteger)r.y, (NSUInteger)r.w, (NSUInteger)r.h)
-                                        mipmapLevel:0
-                                          withBytes:tex->GetPixelsAt(r.x, r.y)
-                                        bytesPerRow:(NSUInteger)tex->Width * 4];
-        }
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
-    {
-        ImGui_ImplMetal_DestroyTexture(tex);
-    }
+    return (bd->SharedMetalContext.fontTexture != nil);
+}
+
+void ImGui_ImplMetal_DestroyFontsTexture()
+{
+    ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
+    ImGuiIO& io = ImGui::GetIO();
+    bd->SharedMetalContext.fontTexture = nil;
+    io.Fonts->SetTexID(0);
 }
 
 bool ImGui_ImplMetal_CreateDeviceObjects(id<MTLDevice> device)
@@ -382,61 +381,165 @@ bool ImGui_ImplMetal_CreateDeviceObjects(id<MTLDevice> device)
     depthStencilDescriptor.depthWriteEnabled = NO;
     depthStencilDescriptor.depthCompareFunction = MTLCompareFunctionAlways;
     bd->SharedMetalContext.depthStencilState = [device newDepthStencilStateWithDescriptor:depthStencilDescriptor];
+    ImGui_ImplMetal_CreateDeviceObjectsForPlatformWindows();
 #ifdef IMGUI_IMPL_METAL_CPP
     [depthStencilDescriptor release];
 #endif
-
+    ImGui_ImplMetal_CreateFontsTexture(device);
     return true;
 }
 
 void ImGui_ImplMetal_DestroyDeviceObjects()
 {
     ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
-
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-            ImGui_ImplMetal_DestroyTexture(tex);
-
+    ImGui_ImplMetal_DestroyFontsTexture();
+    ImGui_ImplMetal_InvalidateDeviceObjectsForPlatformWindows();
     [bd->SharedMetalContext.renderPipelineStateCache removeAllObjects];
 }
 
-bool ImGui_ImplMetal_Init(id<MTLDevice> device)
+#pragma mark - Multi-viewport support
+
+#import <QuartzCore/CAMetalLayer.h>
+
+#if TARGET_OS_OSX
+#import <Cocoa/Cocoa.h>
+#endif
+
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the back-end to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+struct ImGuiViewportDataMetal
 {
-    ImGuiIO& io = ImGui::GetIO();
-    IMGUI_CHECKVERSION();
-    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
+    CAMetalLayer*               MetalLayer;
+    id<MTLCommandQueue>         CommandQueue;
+    MTLRenderPassDescriptor*    RenderPassDescriptor;
+    void*                       Handle = nullptr;
+    bool                        FirstFrame = true;
+};
 
-    ImGui_ImplMetal_Data* bd = IM_NEW(ImGui_ImplMetal_Data)();
-    io.BackendRendererUserData = (void*)bd;
-    io.BackendRendererName = "imgui_impl_metal";
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
-
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplMetal_DrawCallback_ResetRenderState;
-
-    bd->SharedMetalContext = [[MetalContext alloc] init];
-    bd->SharedMetalContext.device = device;
-
-    return true;
-}
-
-void ImGui_ImplMetal_Shutdown()
+static void ImGui_ImplMetal_CreateWindow(ImGuiViewport* viewport)
 {
     ImGui_ImplMetal_Data* bd = ImGui_ImplMetal_GetBackendData();
-    IM_UNUSED(bd);
-    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
-    ImGuiIO& io = ImGui::GetIO();
+    ImGuiViewportDataMetal* data = IM_NEW(ImGuiViewportDataMetal)();
+    viewport->RendererUserData = data;
+
+    // PlatformHandleRaw should always be a NSWindow*, whereas PlatformHandle might be a higher-level handle (e.g. GLFWWindow*, SDL_Window*).
+    // Some back-ends will leave PlatformHandleRaw == 0, in which case we assume PlatformHandle will contain the NSWindow*.
+    void* handle = viewport->PlatformHandleRaw ? viewport->PlatformHandleRaw : viewport->PlatformHandle;
+    IM_ASSERT(handle != nullptr);
+
+    id<MTLDevice> device = bd->SharedMetalContext.device;
+    CAMetalLayer* layer = [CAMetalLayer layer];
+    layer.device = device;
+    layer.framebufferOnly = YES;
+    layer.pixelFormat = bd->SharedMetalContext.framebufferDescriptor.colorPixelFormat;
+#if TARGET_OS_OSX
+    NSWindow* window = (__bridge NSWindow*)handle;
+    NSView* view = window.contentView;
+    view.layer = layer;
+    view.wantsLayer = YES;
+#endif
+    data->MetalLayer = layer;
+    data->CommandQueue = [device newCommandQueue];
+    data->RenderPassDescriptor = [[MTLRenderPassDescriptor alloc] init];
+    data->Handle = handle;
+}
+
+static void ImGui_ImplMetal_DestroyWindow(ImGuiViewport* viewport)
+{
+    // The main viewport (owned by the application) will always have RendererUserData == 0 since we didn't create the data for it.
+    if (ImGuiViewportDataMetal* data = (ImGuiViewportDataMetal*)viewport->RendererUserData)
+        IM_DELETE(data);
+    viewport->RendererUserData = nullptr;
+}
+
+inline static CGSize MakeScaledSize(CGSize size, CGFloat scale)
+{
+    return CGSizeMake(size.width * scale, size.height * scale);
+}
+
+static void ImGui_ImplMetal_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGuiViewportDataMetal* data = (ImGuiViewportDataMetal*)viewport->RendererUserData;
+    data->MetalLayer.drawableSize = MakeScaledSize(CGSizeMake(size.x, size.y), viewport->DpiScale);
+}
+
+static void ImGui_ImplMetal_RenderWindow(ImGuiViewport* viewport, void*)
+{
+    ImGuiViewportDataMetal* data = (ImGuiViewportDataMetal*)viewport->RendererUserData;
+
+#if TARGET_OS_OSX
+    void* handle = viewport->PlatformHandleRaw ? viewport->PlatformHandleRaw : viewport->PlatformHandle;
+    NSWindow* window = (__bridge NSWindow*)handle;
+
+    // Always render the first frame, regardless of occlusionState, to avoid an initial flicker
+    if ((window.occlusionState & NSWindowOcclusionStateVisible) == 0 && !data->FirstFrame)
+    {
+        // Do not render windows which are completely occluded. Calling -[CAMetalLayer nextDrawable] will hang for
+        // approximately 1 second if the Metal layer is completely occluded.
+        return;
+    }
+    data->FirstFrame = false;
+
+    viewport->DpiScale = (float)window.backingScaleFactor;
+    if (data->MetalLayer.contentsScale != viewport->DpiScale)
+    {
+        data->MetalLayer.contentsScale = viewport->DpiScale;
+        data->MetalLayer.drawableSize = MakeScaledSize(window.frame.size, viewport->DpiScale);
+    }
+    viewport->DrawData->FramebufferScale = ImVec2(viewport->DpiScale, viewport->DpiScale);
+#endif
+
+    id <CAMetalDrawable> drawable = [data->MetalLayer nextDrawable];
+    if (drawable == nil)
+        return;
+
+    MTLRenderPassDescriptor* renderPassDescriptor = data->RenderPassDescriptor;
+    renderPassDescriptor.colorAttachments[0].texture = drawable.texture;
+    renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(0, 0, 0, 0);
+    if ((viewport->Flags & ImGuiViewportFlags_NoRendererClear) == 0)
+        renderPassDescriptor.colorAttachments[0].loadAction = MTLLoadActionClear;
+
+    id <MTLCommandBuffer> commandBuffer = [data->CommandQueue commandBuffer];
+    id <MTLRenderCommandEncoder> renderEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
+    ImGui_ImplMetal_RenderDrawData(viewport->DrawData, commandBuffer, renderEncoder);
+    [renderEncoder endEncoding];
+
+    [commandBuffer presentDrawable:drawable];
+    [commandBuffer commit];
+}
+
+static void ImGui_ImplMetal_InitMultiViewportSupport()
+{
     ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Renderer_CreateWindow = ImGui_ImplMetal_CreateWindow;
+    platform_io.Renderer_DestroyWindow = ImGui_ImplMetal_DestroyWindow;
+    platform_io.Renderer_SetWindowSize = ImGui_ImplMetal_SetWindowSize;
+    platform_io.Renderer_RenderWindow = ImGui_ImplMetal_RenderWindow;
+}
 
-    ImGui_ImplMetal_DestroyDeviceObjects();
-    ImGui_ImplMetal_DestroyBackendData();
+static void ImGui_ImplMetal_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
+}
 
-    io.BackendRendererName = nullptr;
-    io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
+static void ImGui_ImplMetal_CreateDeviceObjectsForPlatformWindows()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    for (int i = 1; i < platform_io.Viewports.Size; i++)
+        if (!platform_io.Viewports[i]->RendererUserData)
+            ImGui_ImplMetal_CreateWindow(platform_io.Viewports[i]);
+}
+
+static void ImGui_ImplMetal_InvalidateDeviceObjectsForPlatformWindows()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    for (int i = 1; i < platform_io.Viewports.Size; i++)
+        if (platform_io.Viewports[i]->RendererUserData)
+            ImGui_ImplMetal_DestroyWindow(platform_io.Viewports[i]);
 }
 
 #pragma mark - MetalBuffer implementation
@@ -501,18 +604,6 @@ void ImGui_ImplMetal_Shutdown()
 
 @end
 
-#pragma mark - MetalTexture implementation
-
-@implementation MetalTexture
-- (instancetype)initWithTexture:(id<MTLTexture>)metalTexture
-{
-    if ((self = [super init]))
-        self.metalTexture = metalTexture;
-    return self;
-}
-
-@end
-
 #pragma mark - MetalContext implementation
 
 @implementation MetalContext
@@ -522,7 +613,6 @@ void ImGui_ImplMetal_Shutdown()
     {
         self.renderPipelineStateCache = [NSMutableDictionary dictionary];
         self.bufferCache = [NSMutableArray array];
-        self.bufferCacheLock = [[NSObject alloc] init];
         _lastBufferCachePurge = GetMachAbsoluteTimeInSeconds();
     }
     return self;
@@ -530,9 +620,9 @@ void ImGui_ImplMetal_Shutdown()
 
 - (MetalBuffer*)dequeueReusableBufferOfLength:(NSUInteger)length device:(id<MTLDevice>)device
 {
-    double now = GetMachAbsoluteTimeInSeconds();
+    uint64_t now = GetMachAbsoluteTimeInSeconds();
 
-    @synchronized(self.bufferCacheLock)
+    @synchronized(self.bufferCache)
     {
         // Purge old buffers that haven't been useful for a while
         if (now - self.lastBufferCachePurge > 1.0)

backends/imgui_impl_null.cpp

@@ -1,102 +0,0 @@
-// dear imgui: Null Platform+Renderer Backends
-// This is designed if you need to use a blind Dear Imgui context with no input and no output.
-
-// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
-// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
-// Learn about Dear ImGui:
-// - FAQ                  https://dearimgui.com/faq
-// - Getting Started      https://dearimgui.com/getting-started
-// - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
-// - Introduction, links and more at the top of imgui.cpp
-
-// CHANGELOG
-// (minor and older changes stripped away, please see git history for details)
-//  2025-11-17: Initial version.
-
-#include "imgui.h"
-#ifndef IMGUI_DISABLE
-#include "imgui_impl_null.h"
-
-// Clang/GCC warnings with -Weverything
-#if defined(__clang__)
-#pragma clang diagnostic ignored "-Wold-style-cast"         // warning: use of old-style cast                            // yes, they are more terse.
-#endif
-
-IMGUI_IMPL_API bool ImGui_ImplNull_Init()
-{
-    ImGui_ImplNullPlatform_Init();
-    ImGui_ImplNullRender_Init();
-    return true;
-}
-
-IMGUI_IMPL_API void ImGui_ImplNull_Shutdown()
-{
-    ImGui_ImplNullRender_Shutdown();
-    ImGui_ImplNullPlatform_Shutdown();
-}
-
-IMGUI_IMPL_API void ImGui_ImplNull_NewFrame()
-{
-    ImGui_ImplNullPlatform_NewFrame();
-    ImGui_ImplNullRender_NewFrame();
-}
-
-IMGUI_IMPL_API bool ImGui_ImplNullPlatform_Init()
-{
-    ImGuiIO& io = ImGui::GetIO();
-    io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;
-    return true;
-}
-
-IMGUI_IMPL_API void ImGui_ImplNullPlatform_Shutdown()
-{
-    ImGuiIO& io = ImGui::GetIO();
-    io.BackendFlags &= ~ImGuiBackendFlags_HasMouseCursors;
-}
-
-IMGUI_IMPL_API void ImGui_ImplNullPlatform_NewFrame()
-{
-    ImGuiIO& io = ImGui::GetIO();
-    io.DisplaySize = ImVec2(1920, 1080);
-    io.DeltaTime = 1.0f / 60.0f;
-}
-
-IMGUI_IMPL_API bool ImGui_ImplNullRender_Init()
-{
-    ImGuiIO& io = ImGui::GetIO();
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;
-    return true;
-}
-
-IMGUI_IMPL_API void ImGui_ImplNullRender_Shutdown()
-{
-    ImGuiIO& io = ImGui::GetIO();
-    io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset;
-    io.BackendFlags &= ~ImGuiBackendFlags_RendererHasTextures;
-}
-
-IMGUI_IMPL_API void ImGui_ImplNullRender_NewFrame()
-{
-}
-
-static void ImGui_ImplNullRender_UpdateTexture(ImTextureData* tex)
-{
-    if (tex->Status == ImTextureStatus_WantCreate || tex->Status == ImTextureStatus_WantDestroy)
-        tex->SetStatus(ImTextureStatus_OK);
-    if (tex->Status == ImTextureStatus_WantDestroy)
-    {
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->SetStatus(ImTextureStatus_Destroyed);
-    }
-}
-
-IMGUI_IMPL_API void ImGui_ImplNullRender_RenderDrawData(ImDrawData* draw_data)
-{
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplNullRender_UpdateTexture(tex);
-}
-
-#endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_null.h

@@ -1,34 +0,0 @@
-// dear imgui: Null Platform+Renderer Backends
-// This is designed if you need to use a blind Dear Imgui context with no input and no output.
-
-// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
-// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
-// Learn about Dear ImGui:
-// - FAQ                  https://dearimgui.com/faq
-// - Getting Started      https://dearimgui.com/getting-started
-// - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
-// - Introduction, links and more at the top of imgui.cpp
-
-#pragma once
-#include "imgui.h"      // IMGUI_IMPL_API
-#ifndef IMGUI_DISABLE
-
-// Follow "Getting Started" link and check examples/ folder to learn about using backends!
-
-// Null = NullPlatform + NullRender
-IMGUI_IMPL_API bool     ImGui_ImplNull_Init();
-IMGUI_IMPL_API void     ImGui_ImplNull_Shutdown();
-IMGUI_IMPL_API void     ImGui_ImplNull_NewFrame();
-
-// Null platform only (single screen, fixed timestep, no inputs)
-IMGUI_IMPL_API bool     ImGui_ImplNullPlatform_Init();
-IMGUI_IMPL_API void     ImGui_ImplNullPlatform_Shutdown();
-IMGUI_IMPL_API void     ImGui_ImplNullPlatform_NewFrame();
-
-// Null renderer only (no output)
-IMGUI_IMPL_API bool     ImGui_ImplNullRender_Init();
-IMGUI_IMPL_API void     ImGui_ImplNullRender_Shutdown();
-IMGUI_IMPL_API void     ImGui_ImplNullRender_NewFrame();
-IMGUI_IMPL_API void     ImGui_ImplNullRender_RenderDrawData(ImDrawData* draw_data);
-
-#endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_opengl2.cpp

@@ -2,11 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 // Missing features or Issues:
 //  [ ] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [ ] Renderer: Use of DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest is emulated by poking to glTexParameter(), as legacy OpenGL doesn't have glBindSampler().
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -26,11 +25,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: OpenGL: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
-//  2026-03-12: OpenGL: Fixed invalid assert in ImGui_ImplOpenGL3_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-07-15: OpenGL: Set GL_UNPACK_ALIGNMENT to 1 before updating textures. (#8802)
-//  2025-06-11: OpenGL: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplOpenGL2_CreateFontsTexture() and ImGui_ImplOpenGL2_DestroyFontsTexture().
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2024-10-07: OpenGL: Changed default texture sampler to Clamp instead of Repeat/Wrap.
 //  2024-06-28: OpenGL: ImGui_ImplOpenGL2_NewFrame() recreates font texture if it has been destroyed by ImGui_ImplOpenGL2_DestroyFontsTexture(). (#7748)
 //  2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
@@ -76,20 +71,9 @@
 #include <GL/gl.h>
 #endif
 
-// [Debugging]
-//#define IMGUI_IMPL_OPENGL_DEBUG
-#ifdef IMGUI_IMPL_OPENGL_DEBUG
-#include <stdio.h>
-#define GL_CALL(_CALL)      do { _CALL; GLenum gl_err = glGetError(); if (gl_err != 0) fprintf(stderr, "GL error 0x%x returned from '%s'.\n", gl_err, #_CALL); } while (0)  // Call with error check
-#else
-#define GL_CALL(_CALL)      _CALL   // Call without error check
-#endif
-
-// OpenGL data
 struct ImGui_ImplOpenGL2_Data
 {
-    bool        UseTexParameterToSetSampler;
-    GLuint      NextSampler;
+    GLuint       FontTexture;
 
     ImGui_ImplOpenGL2_Data() { memset((void*)this, 0, sizeof(*this)); }
 };
@@ -101,18 +85,56 @@ static ImGui_ImplOpenGL2_Data* ImGui_ImplOpenGL2_GetBackendData()
     return ImGui::GetCurrentContext() ? (ImGui_ImplOpenGL2_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
 }
 
+// Forward Declarations
+static void ImGui_ImplOpenGL2_InitMultiViewportSupport();
+static void ImGui_ImplOpenGL2_ShutdownMultiViewportSupport();
+
 // Functions
+bool    ImGui_ImplOpenGL2_Init()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    IMGUI_CHECKVERSION();
+    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
+
+    // Setup backend capabilities flags
+    ImGui_ImplOpenGL2_Data* bd = IM_NEW(ImGui_ImplOpenGL2_Data)();
+    io.BackendRendererUserData = (void*)bd;
+    io.BackendRendererName = "imgui_impl_opengl2";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;    // We can create multi-viewports on the Renderer side (optional)
+
+    ImGui_ImplOpenGL2_InitMultiViewportSupport();
+
+    return true;
+}
+
+void    ImGui_ImplOpenGL2_Shutdown()
+{
+    ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData();
+    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
+    ImGuiIO& io = ImGui::GetIO();
+
+    ImGui_ImplOpenGL2_ShutdownMultiViewportSupport();
+    ImGui_ImplOpenGL2_DestroyDeviceObjects();
+    io.BackendRendererName = nullptr;
+    io.BackendRendererUserData = nullptr;
+    io.BackendFlags &= ~ImGuiBackendFlags_RendererHasViewports;
+    IM_DELETE(bd);
+}
+
 void    ImGui_ImplOpenGL2_NewFrame()
 {
     ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplOpenGL2_Init()?");
-    IM_UNUSED(bd);
+
+    if (!bd->FontTexture)
+        ImGui_ImplOpenGL2_CreateDeviceObjects();
+    if (!bd->FontTexture)
+        ImGui_ImplOpenGL2_CreateFontsTexture();
 }
 
 static void ImGui_ImplOpenGL2_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height)
 {
     // Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers, polygon fill.
-    ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData();
     glEnable(GL_BLEND);
     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
     //glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA); // In order to composite our output buffer we need to preserve alpha
@@ -130,7 +152,6 @@ static void ImGui_ImplOpenGL2_SetupRenderState(ImDrawData* draw_data, int fb_wid
     glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
     glShadeModel(GL_SMOOTH);
     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-    bd->NextSampler = GL_LINEAR;
 
     // If you are using this code with non-legacy OpenGL header/contexts (which you should not, prefer using imgui_impl_opengl3.cpp!!),
     // you may need to backup/reset/restore other state, e.g. for current shader using the commented lines below.
@@ -145,7 +166,7 @@ static void ImGui_ImplOpenGL2_SetupRenderState(ImDrawData* draw_data, int fb_wid
 
     // Setup viewport, orthographic projection matrix
     // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
-    GL_CALL(glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height));
+    glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height);
     glMatrixMode(GL_PROJECTION);
     glPushMatrix();
     glLoadIdentity();
@@ -155,30 +176,17 @@ static void ImGui_ImplOpenGL2_SetupRenderState(ImDrawData* draw_data, int fb_wid
     glLoadIdentity();
 }
 
-// Draw callbacks
-static void ImGui_ImplOpenGL2_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)    {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplOpenGL2_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)    { ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData(); bd->UseTexParameterToSetSampler = true; bd->NextSampler = GL_LINEAR; }
-static void ImGui_ImplOpenGL2_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)   { ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData(); bd->UseTexParameterToSetSampler = true; bd->NextSampler = GL_NEAREST; }
-
 // OpenGL2 Render function.
 // Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly.
 // This is in order to be able to run within an OpenGL engine that doesn't do so.
 void ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data)
 {
     // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
-    ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData();
     int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
     int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
     if (fb_width == 0 || fb_height == 0)
         return;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplOpenGL2_UpdateTexture(tex);
-
     // Backup GL state
     GLint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
     GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
@@ -196,8 +204,9 @@ void ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data)
     ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
 
     // Render command lists
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         const ImDrawVert* vtx_buffer = draw_list->VtxBuffer.Data;
         const ImDrawIdx* idx_buffer = draw_list->IdxBuffer.Data;
         glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + offsetof(ImDrawVert, pos)));
@@ -210,7 +219,8 @@ void ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data)
             if (pcmd->UserCallback)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplOpenGL2_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplOpenGL2_SetupRenderState(draw_data, fb_width, fb_height);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -227,17 +237,7 @@ void ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data)
                 glScissor((int)clip_min.x, (int)((float)fb_height - clip_max.y), (int)(clip_max.x - clip_min.x), (int)(clip_max.y - clip_min.y));
 
                 // Bind texture, Draw
-                GLuint pcmd_texture = (GLuint)(intptr_t)pcmd->GetTexID();
-                glBindTexture(GL_TEXTURE_2D, pcmd_texture);
-
-                // Emulate sampler change (even though it is technically part of texture data)
-                // As a sort of hack/workaround, we only start writing using glTextParameter() if sampler is ever changed explicitly.
-                if (bd->UseTexParameterToSetSampler)
-                {
-                    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, bd->NextSampler);
-                    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, bd->NextSampler);
-                }
-
+                glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID());
                 glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer + pcmd->IdxOffset);
             }
         }
@@ -260,115 +260,86 @@ void ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data)
     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, last_tex_env_mode);
 }
 
-void ImGui_ImplOpenGL2_UpdateTexture(ImTextureData* tex)
+bool ImGui_ImplOpenGL2_CreateFontsTexture()
 {
-    if (tex->Status == ImTextureStatus_WantCreate)
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);   // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
+
+    // Upload texture to graphics system
+    // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+    GLint last_texture;
+    glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
+    glGenTextures(1, &bd->FontTexture);
+    glBindTexture(GL_TEXTURE_2D, bd->FontTexture);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
+
+    // Restore state
+    glBindTexture(GL_TEXTURE_2D, last_texture);
+
+    return true;
+}
+
+void ImGui_ImplOpenGL2_DestroyFontsTexture()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData();
+    if (bd->FontTexture)
     {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-        const void* pixels = tex->GetPixels();
-        GLuint gl_texture_id = 0;
-
-        // Upload texture to graphics system
-        // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
-        GLint last_texture;
-        GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
-        GL_CALL(glGenTextures(1, &gl_texture_id));
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_texture_id));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));
-        GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
-        GL_CALL(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
-        GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex->Width, tex->Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)gl_texture_id);
-        tex->SetStatus(ImTextureStatus_OK);
-
-        // Restore state
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        GLint last_texture;
-        GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
-
-        GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_tex_id));
-        GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->Width));
-        GL_CALL(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
-        for (ImTextureRect& r : tex->Updates)
-            GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, r.x, r.y, r.w, r.h, GL_RGBA, GL_UNSIGNED_BYTE, tex->GetPixelsAt(r.x, r.y)));
-        GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture)); // Restore state
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantDestroy)
-    {
-        GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
-        glDeleteTextures(1, &gl_tex_id);
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->SetStatus(ImTextureStatus_Destroyed);
+        glDeleteTextures(1, &bd->FontTexture);
+        io.Fonts->SetTexID(0);
+        bd->FontTexture = 0;
     }
 }
 
 bool    ImGui_ImplOpenGL2_CreateDeviceObjects()
 {
-    return true;
+    return ImGui_ImplOpenGL2_CreateFontsTexture();
 }
 
 void    ImGui_ImplOpenGL2_DestroyDeviceObjects()
 {
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-        {
-            tex->SetStatus(ImTextureStatus_WantDestroy);
-            ImGui_ImplOpenGL2_UpdateTexture(tex);
-        }
+    ImGui_ImplOpenGL2_DestroyFontsTexture();
 }
 
-bool    ImGui_ImplOpenGL2_Init()
+
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+static void ImGui_ImplOpenGL2_RenderWindow(ImGuiViewport* viewport, void*)
 {
-    ImGuiIO& io = ImGui::GetIO();
-    IMGUI_CHECKVERSION();
-    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
-
-    // Setup backend capabilities flags
-    ImGui_ImplOpenGL2_Data* bd = IM_NEW(ImGui_ImplOpenGL2_Data)();
-    io.BackendRendererUserData = (void*)bd;
-    io.BackendRendererName = "imgui_impl_opengl2";
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;       // We can honor ImGuiPlatformIO::Textures[] requests during render.
-
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplOpenGL2_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplOpenGL2_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplOpenGL2_DrawCallback_SetSamplerNearest;
-
-    return true;
+    if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
+    {
+        ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);
+        glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
+        glClear(GL_COLOR_BUFFER_BIT);
+    }
+    ImGui_ImplOpenGL2_RenderDrawData(viewport->DrawData);
 }
 
-void    ImGui_ImplOpenGL2_Shutdown()
+static void ImGui_ImplOpenGL2_InitMultiViewportSupport()
 {
-    ImGui_ImplOpenGL2_Data* bd = ImGui_ImplOpenGL2_GetBackendData();
-    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
-    ImGuiIO& io = ImGui::GetIO();
     ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Renderer_RenderWindow = ImGui_ImplOpenGL2_RenderWindow;
+}
 
-    ImGui_ImplOpenGL2_DestroyDeviceObjects();
-
-    io.BackendRendererName = nullptr;
-    io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
-    IM_DELETE(bd);
+static void ImGui_ImplOpenGL2_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
 }
 
 //-----------------------------------------------------------------------------

backends/imgui_impl_opengl2.h

@@ -2,11 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 // Missing features or Issues:
 //  [ ] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [ ] Renderer: Use of DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest is emulated by poking to glTexParameter(), as legacy OpenGL doesn't have glBindSampler().
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -35,10 +34,9 @@ IMGUI_IMPL_API void     ImGui_ImplOpenGL2_NewFrame();
 IMGUI_IMPL_API void     ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data);
 
 // Called by Init/NewFrame/Shutdown
+IMGUI_IMPL_API bool     ImGui_ImplOpenGL2_CreateFontsTexture();
+IMGUI_IMPL_API void     ImGui_ImplOpenGL2_DestroyFontsTexture();
 IMGUI_IMPL_API bool     ImGui_ImplOpenGL2_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplOpenGL2_DestroyDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplOpenGL2_UpdateTexture(ImTextureData* tex);
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_opengl3.cpp

@@ -4,9 +4,9 @@
 // This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
 //  [x] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset) [Desktop OpenGL only!]
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // About WebGL/ES:
 // - You need to '#define IMGUI_IMPL_OPENGL_ES2' or '#define IMGUI_IMPL_OPENGL_ES3' to use WebGL or OpenGL ES.
@@ -23,15 +23,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: OpenGL: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
-//  2026-03-12: OpenGL: Fixed invalid assert in ImGui_ImplOpenGL3_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295)
-//  2025-12-11: OpenGL: Fixed embedded loader multiple init/shutdown cycles broken on some platforms. (#8792, #9112)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-07-22: OpenGL: Add and call embedded loader shutdown during ImGui_ImplOpenGL3_Shutdown() to facilitate multiple init/shutdown cycles in same process. (#8792)
-//  2025-07-15: OpenGL: Set GL_UNPACK_ALIGNMENT to 1 before updating textures (#8802) + restore non-WebGL/ES update path that doesn't require a CPU-side copy.
-//  2025-06-11: OpenGL: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplOpenGL3_CreateFontsTexture() and ImGui_ImplOpenGL3_DestroyFontsTexture().
-//  2025-06-04: OpenGL: Made GLES 3.20 contexts not access GL_CONTEXT_PROFILE_MASK nor GL_PRIMITIVE_RESTART. (#8664)
-//  2025-02-18: OpenGL: Lazily reinitialize embedded GL loader for when calling backend from e.g. other DLL boundaries. (#8406)
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2024-10-07: OpenGL: Changed default texture sampler to Clamp instead of Repeat/Wrap.
 //  2024-06-28: OpenGL: ImGui_ImplOpenGL3_NewFrame() recreates font texture if it has been destroyed by ImGui_ImplOpenGL3_DestroyFontsTexture(). (#7748)
 //  2024-05-07: OpenGL: Update loader for Linux to support EGL/GLVND. (#7562)
@@ -43,7 +35,7 @@
 //  2023-05-09: OpenGL: Support for glBindSampler() backup/restore on ES3. (#6375)
 //  2023-04-18: OpenGL: Restore front and back polygon mode separately when supported by context. (#6333)
 //  2023-03-23: OpenGL: Properly restoring "no shader program bound" if it was the case prior to running the rendering function. (#6267, #6220, #6224)
-//  2023-03-15: OpenGL: Fixed GL loader crash when GL_VERSION returns nullptr. (#6154, #4445, #3530)
+//  2023-03-15: OpenGL: Fixed GL loader crash when GL_VERSION returns NULL. (#6154, #4445, #3530)
 //  2023-03-06: OpenGL: Fixed restoration of a potentially deleted OpenGL program, by calling glIsProgram(). (#6220, #6224)
 //  2022-11-09: OpenGL: Reverted use of glBufferSubData(), too many corruptions issues + old issues seemingly can't be reproed with Intel drivers nowadays (revert 2021-12-15 and 2022-05-23 changes).
 //  2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
@@ -63,7 +55,7 @@
 //  2021-01-03: OpenGL: Backup, setup and restore GL_STENCIL_TEST state.
 //  2020-10-23: OpenGL: Backup, setup and restore GL_PRIMITIVE_RESTART state.
 //  2020-10-15: OpenGL: Use glGetString(GL_VERSION) instead of glGetIntegerv(GL_MAJOR_VERSION, ...) when the later returns zero (e.g. Desktop GL 2.x)
-//  2020-09-17: OpenGL: Fix to avoid compiling/calling glBindSampler() on ES or pre-3.3 context which have the defines set by a loader.
+//  2020-09-17: OpenGL: Fix to avoid compiling/calling glBindSampler() on ES or pre 3.3 context which have the defines set by a loader.
 //  2020-07-10: OpenGL: Added support for glad2 OpenGL loader.
 //  2020-05-08: OpenGL: Made default GLSL version 150 (instead of 130) on OSX.
 //  2020-04-21: OpenGL: Fixed handling of glClipControl(GL_UPPER_LEFT) by inverting projection matrix.
@@ -179,7 +171,6 @@
 // - You can temporarily use an unstripped version. See https://github.com/dearimgui/gl3w_stripped/releases
 // Changes to this backend using new APIs should be accompanied by a regenerated stripped loader version.
 #define IMGL3W_IMPL
-#define IMGUI_IMPL_OPENGL_LOADER_IMGL3W
 #include "imgui_impl_opengl3_loader.h"
 #endif
 
@@ -239,7 +230,7 @@ struct ImGui_ImplOpenGL3_Data
     bool            GlProfileIsES3;
     bool            GlProfileIsCompat;
     GLint           GlProfileMask;
-    GLint           MaxTextureSize;
+    GLuint          FontTexture;
     GLuint          ShaderHandle;
     GLint           AttribLocationTex;       // Uniforms location
     GLint           AttribLocationProjMtx;
@@ -250,14 +241,8 @@ struct ImGui_ImplOpenGL3_Data
     GLsizeiptr      VertexBufferSize;
     GLsizeiptr      IndexBufferSize;
     bool            HasPolygonMode;
-    bool            HasBindSampler;
     bool            HasClipOrigin;
     bool            UseBufferSubData;
-    bool            UseTexParameterToSetSampler;
-    GLuint          NextSampler;            // Used if !HasBindSampler && UseTexParameterToSetSampler.
-    GLuint          TexSamplers[2];         // Used if IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER && HasBindSimpler (0=linear, 1=nearest).
-
-    ImVector<char>  TempBuffer;
 
     ImGui_ImplOpenGL3_Data() { memset((void*)this, 0, sizeof(*this)); }
 };
@@ -269,6 +254,10 @@ static ImGui_ImplOpenGL3_Data* ImGui_ImplOpenGL3_GetBackendData()
     return ImGui::GetCurrentContext() ? (ImGui_ImplOpenGL3_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
 }
 
+// Forward Declarations
+static void ImGui_ImplOpenGL3_InitMultiViewportSupport();
+static void ImGui_ImplOpenGL3_ShutdownMultiViewportSupport();
+
 // OpenGL vertex attribute state (for ES 1.0 and ES 2.0 only)
 #ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
 struct ImGui_ImplOpenGL3_VtxAttribState
@@ -293,39 +282,143 @@ struct ImGui_ImplOpenGL3_VtxAttribState
 };
 #endif
 
-// Not static to allow third-party code to use that if they want to (but undocumented)
-bool ImGui_ImplOpenGL3_InitLoader();
-bool ImGui_ImplOpenGL3_InitLoader()
+// Functions
+bool    ImGui_ImplOpenGL3_Init(const char* glsl_version)
 {
-    // Lazily initialize our loader if not already done
-    // (to facilitate handling multiple DLL boundaries and multiple context shutdowns we call this from all main entry points)
-#ifdef IMGUI_IMPL_OPENGL_LOADER_IMGL3W
-    if (glGetIntegerv == nullptr && imgl3wInit() != 0)
+    ImGuiIO& io = ImGui::GetIO();
+    IMGUI_CHECKVERSION();
+    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
+
+    // Initialize our loader
+#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
+    if (imgl3wInit() != 0)
     {
         fprintf(stderr, "Failed to initialize OpenGL loader!\n");
         return false;
     }
 #endif
+
+    // Setup backend capabilities flags
+    ImGui_ImplOpenGL3_Data* bd = IM_NEW(ImGui_ImplOpenGL3_Data)();
+    io.BackendRendererUserData = (void*)bd;
+    io.BackendRendererName = "imgui_impl_opengl3";
+
+    // Query for GL version (e.g. 320 for GL 3.2)
+    const char* gl_version_str = (const char*)glGetString(GL_VERSION);
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+    // GLES 2
+    bd->GlVersion = 200;
+    bd->GlProfileIsES2 = true;
+#else
+    // Desktop or GLES 3
+    GLint major = 0;
+    GLint minor = 0;
+    glGetIntegerv(GL_MAJOR_VERSION, &major);
+    glGetIntegerv(GL_MINOR_VERSION, &minor);
+    if (major == 0 && minor == 0)
+        sscanf(gl_version_str, "%d.%d", &major, &minor); // Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
+    bd->GlVersion = (GLuint)(major * 100 + minor * 10);
+#if defined(GL_CONTEXT_PROFILE_MASK)
+    if (bd->GlVersion >= 320)
+        glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &bd->GlProfileMask);
+    bd->GlProfileIsCompat = (bd->GlProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) != 0;
+#endif
+
+#if defined(IMGUI_IMPL_OPENGL_ES3)
+    bd->GlProfileIsES3 = true;
+#else
+    if (strncmp(gl_version_str, "OpenGL ES 3", 11) == 0)
+        bd->GlProfileIsES3 = true;
+#endif
+
+    bd->UseBufferSubData = false;
+    /*
+    // Query vendor to enable glBufferSubData kludge
+#ifdef _WIN32
+    if (const char* vendor = (const char*)glGetString(GL_VENDOR))
+        if (strncmp(vendor, "Intel", 5) == 0)
+            bd->UseBufferSubData = true;
+#endif
+    */
+#endif
+
+#ifdef IMGUI_IMPL_OPENGL_DEBUG
+    printf("GlVersion = %d, \"%s\"\nGlProfileIsCompat = %d\nGlProfileMask = 0x%X\nGlProfileIsES2/IsEs3 = %d/%d\nGL_VENDOR = '%s'\nGL_RENDERER = '%s'\n", bd->GlVersion, gl_version_str, bd->GlProfileIsCompat, bd->GlProfileMask, bd->GlProfileIsES2, bd->GlProfileIsES3, (const char*)glGetString(GL_VENDOR), (const char*)glGetString(GL_RENDERER)); // [DEBUG]
+#endif
+
+#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
+    if (bd->GlVersion >= 320)
+        io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+#endif
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;  // We can create multi-viewports on the Renderer side (optional)
+
+    // Store GLSL version string so we can refer to it later in case we recreate shaders.
+    // Note: GLSL version is NOT the same as GL version. Leave this to nullptr if unsure.
+    if (glsl_version == nullptr)
+    {
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+        glsl_version = "#version 100";
+#elif defined(IMGUI_IMPL_OPENGL_ES3)
+        glsl_version = "#version 300 es";
+#elif defined(__APPLE__)
+        glsl_version = "#version 150";
+#else
+        glsl_version = "#version 130";
+#endif
+    }
+    IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(bd->GlslVersionString));
+    strcpy(bd->GlslVersionString, glsl_version);
+    strcat(bd->GlslVersionString, "\n");
+
+    // Make an arbitrary GL call (we don't actually need the result)
+    // IF YOU GET A CRASH HERE: it probably means the OpenGL function loader didn't do its job. Let us know!
+    GLint current_texture;
+    glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
+
+    // Detect extensions we support
+#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
+    bd->HasPolygonMode = (!bd->GlProfileIsES2 && !bd->GlProfileIsES3);
+#endif
+    bd->HasClipOrigin = (bd->GlVersion >= 450);
+#ifdef IMGUI_IMPL_OPENGL_HAS_EXTENSIONS
+    GLint num_extensions = 0;
+    glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
+    for (GLint i = 0; i < num_extensions; i++)
+    {
+        const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
+        if (extension != nullptr && strcmp(extension, "GL_ARB_clip_control") == 0)
+            bd->HasClipOrigin = true;
+    }
+#endif
+
+    ImGui_ImplOpenGL3_InitMultiViewportSupport();
+
     return true;
 }
 
-static void ImGui_ImplOpenGL3_ShutdownLoader()
+void    ImGui_ImplOpenGL3_Shutdown()
 {
-#ifdef IMGUI_IMPL_OPENGL_LOADER_IMGL3W
-    imgl3wShutdown();
-#endif
+    ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
+    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
+    ImGuiIO& io = ImGui::GetIO();
+
+    ImGui_ImplOpenGL3_ShutdownMultiViewportSupport();
+    ImGui_ImplOpenGL3_DestroyDeviceObjects();
+    io.BackendRendererName = nullptr;
+    io.BackendRendererUserData = nullptr;
+    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasViewports);
+    IM_DELETE(bd);
 }
 
-// Functions
 void    ImGui_ImplOpenGL3_NewFrame()
 {
     ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplOpenGL3_Init()?");
 
-    ImGui_ImplOpenGL3_InitLoader();
     if (!bd->ShaderHandle)
-        if (!ImGui_ImplOpenGL3_CreateDeviceObjects())
-            IM_ASSERT(0 && "ImGui_ImplOpenGL3_CreateDeviceObjects() failed!");
+        ImGui_ImplOpenGL3_CreateDeviceObjects();
+    if (!bd->FontTexture)
+        ImGui_ImplOpenGL3_CreateFontsTexture();
 }
 
 static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
@@ -341,7 +434,7 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
     glDisable(GL_STENCIL_TEST);
     glEnable(GL_SCISSOR_TEST);
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
-    if (!bd->GlProfileIsES3 && bd->GlVersion >= 310)
+    if (bd->GlVersion >= 310)
         glDisable(GL_PRIMITIVE_RESTART);
 #endif
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
@@ -382,8 +475,8 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
     glUniformMatrix4fv(bd->AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
 
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
-    if (bd->HasBindSampler)
-        glBindSampler(0, bd->TexSamplers[0]); // We use combined texture/sampler state. Applications using GL 3.3 and GL ES 3.0 may set that otherwise.
+    if (bd->GlVersion >= 330 || bd->GlProfileIsES3)
+        glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 and GL ES 3.0 may set that otherwise.
 #endif
 
     (void)vertex_array_object;
@@ -402,11 +495,6 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
     GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, col)));
 }
 
-// Draw callbacks
-static void ImGui_ImplOpenGL3_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)    {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplOpenGL3_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)    { ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData(); if (bd->HasBindSampler) { glBindSampler(0, bd->TexSamplers[0]); } else { bd->UseTexParameterToSetSampler = true; bd->NextSampler = GL_LINEAR; } }
-static void ImGui_ImplOpenGL3_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)   { ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData(); if (bd->HasBindSampler) { glBindSampler(0, bd->TexSamplers[1]); } else { bd->UseTexParameterToSetSampler = true; bd->NextSampler = GL_NEAREST; } }
-
 // OpenGL3 Render function.
 // Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly.
 // This is in order to be able to run within an OpenGL engine that doesn't do so.
@@ -418,24 +506,15 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
     if (fb_width <= 0 || fb_height <= 0)
         return;
 
-    ImGui_ImplOpenGL3_InitLoader();
-
     ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplOpenGL3_UpdateTexture(tex);
-
     // Backup GL state
     GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
     glActiveTexture(GL_TEXTURE0);
     GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program);
     GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture);
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
-    GLuint last_sampler; if (bd->HasBindSampler) { glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); } else { last_sampler = 0; }
+    GLuint last_sampler; if (bd->GlVersion >= 330 || bd->GlProfileIsES3) { glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); } else { last_sampler = 0; }
 #endif
     GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer);
 #ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
@@ -465,7 +544,7 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
     GLboolean last_enable_stencil_test = glIsEnabled(GL_STENCIL_TEST);
     GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
-    GLboolean last_enable_primitive_restart = (!bd->GlProfileIsES3 && bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
+    GLboolean last_enable_primitive_restart = (bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
 #endif
 
     // Setup desired GL state
@@ -482,8 +561,10 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
     ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
 
     // Render command lists
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
+
         // Upload vertex/index buffers
         // - OpenGL drivers are in a very sorry state nowadays....
         //   During 2021 we attempted to switch from glBufferData() to orphaning+glBufferSubData() following reports
@@ -521,7 +602,8 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
             if (pcmd->UserCallback != nullptr)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplOpenGL3_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -539,15 +621,6 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
 
                 // Bind texture, Draw
                 GL_CALL(glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID()));
-
-                // Emulate sampler change (even though it is technically part of texture data)
-                // As a sort of hack/workaround, we only start writing using glTextParameter() if sampler is ever changed explicitly.
-                if (!bd->HasBindSampler && bd->UseTexParameterToSetSampler)
-                {
-                    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, bd->NextSampler);
-                    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, bd->NextSampler);
-                }
-
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
                 if (bd->GlVersion >= 320)
                     GL_CALL(glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset));
@@ -568,7 +641,7 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
     if (last_program == 0 || glIsProgram(last_program)) glUseProgram(last_program);
     glBindTexture(GL_TEXTURE_2D, last_texture);
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
-    if (bd->HasBindSampler)
+    if (bd->GlVersion >= 330 || bd->GlProfileIsES3)
         glBindSampler(0, last_sampler);
 #endif
     glActiveTexture(last_active_texture);
@@ -590,7 +663,7 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
     if (last_enable_stencil_test) glEnable(GL_STENCIL_TEST); else glDisable(GL_STENCIL_TEST);
     if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
-    if (!bd->GlProfileIsES3 && bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
+    if (bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
 #endif
 
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
@@ -603,90 +676,50 @@ void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
     (void)bd; // Not all compilation paths use this
 }
 
-static void ImGui_ImplOpenGL3_DestroyTexture(ImTextureData* tex)
+bool ImGui_ImplOpenGL3_CreateFontsTexture()
 {
-    GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
-    glDeleteTextures(1, &gl_tex_id);
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
 
-    // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-    tex->SetTexID(ImTextureID_Invalid);
-    tex->SetStatus(ImTextureStatus_Destroyed);
+    // Build texture atlas
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);   // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
+
+    // Upload texture to graphics system
+    // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+    GLint last_texture;
+    GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
+    GL_CALL(glGenTextures(1, &bd->FontTexture));
+    GL_CALL(glBindTexture(GL_TEXTURE_2D, bd->FontTexture));
+    GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
+    GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
+    GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
+    GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
+#ifdef GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
+    GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
+#endif
+    GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
+
+    // Store identifier
+    io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
+
+    // Restore state
+    GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
+
+    return true;
 }
 
-void ImGui_ImplOpenGL3_UpdateTexture(ImTextureData* tex)
+void ImGui_ImplOpenGL3_DestroyFontsTexture()
 {
-    // FIXME: Consider backing up and restoring
-    if (tex->Status == ImTextureStatus_WantCreate || tex->Status == ImTextureStatus_WantUpdates)
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
+    if (bd->FontTexture)
     {
-#ifdef GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
-        GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
-#endif
-#ifdef GL_UNPACK_ALIGNMENT
-        GL_CALL(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
-#endif
+        glDeleteTextures(1, &bd->FontTexture);
+        io.Fonts->SetTexID(0);
+        bd->FontTexture = 0;
     }
-
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-        const void* pixels = tex->GetPixels();
-        GLuint gl_texture_id = 0;
-
-        // Upload texture to graphics system
-        // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
-        GLint last_texture;
-        GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
-        GL_CALL(glGenTextures(1, &gl_texture_id));
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_texture_id));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
-        GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
-        GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex->Width, tex->Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)gl_texture_id);
-        tex->SetStatus(ImTextureStatus_OK);
-
-        // Restore state
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        GLint last_texture;
-        GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
-
-        GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_tex_id));
-#if GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
-        GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->Width));
-        for (ImTextureRect& r : tex->Updates)
-            GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, r.x, r.y, r.w, r.h, GL_RGBA, GL_UNSIGNED_BYTE, tex->GetPixelsAt(r.x, r.y)));
-        GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
-#else
-        // GL ES doesn't have GL_UNPACK_ROW_LENGTH, so we need to (A) copy to a contiguous buffer or (B) upload line by line.
-        ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
-        for (ImTextureRect& r : tex->Updates)
-        {
-            const int src_pitch = r.w * tex->BytesPerPixel;
-            bd->TempBuffer.resize(r.h * src_pitch);
-            char* out_p = bd->TempBuffer.Data;
-            for (int y = 0; y < r.h; y++, out_p += src_pitch)
-                memcpy(out_p, tex->GetPixelsAt(r.x, r.y + y), src_pitch);
-            IM_ASSERT(out_p == bd->TempBuffer.end());
-            GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, r.x, r.y, r.w, r.h, GL_RGBA, GL_UNSIGNED_BYTE, bd->TempBuffer.Data));
-        }
-#endif
-        tex->SetStatus(ImTextureStatus_OK);
-        GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture)); // Restore state
-    }
-    else if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
-        ImGui_ImplOpenGL3_DestroyTexture(tex);
 }
 
 // If you get an error please report on github. You may try different GL context version or GLSL version. See GL<>GLSL version table at the top of this file.
@@ -729,7 +762,6 @@ static bool CheckProgram(GLuint handle, const char* desc)
 
 bool    ImGui_ImplOpenGL3_CreateDeviceObjects()
 {
-    ImGui_ImplOpenGL3_InitLoader();
     ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
 
     // Backup GL state
@@ -879,24 +911,21 @@ bool    ImGui_ImplOpenGL3_CreateDeviceObjects()
     GL_CALL(vert_handle = glCreateShader(GL_VERTEX_SHADER));
     glShaderSource(vert_handle, 2, vertex_shader_with_version, nullptr);
     glCompileShader(vert_handle);
-    if (!CheckShader(vert_handle, "vertex shader"))
-        return false;
+    CheckShader(vert_handle, "vertex shader");
 
     const GLchar* fragment_shader_with_version[2] = { bd->GlslVersionString, fragment_shader };
     GLuint frag_handle;
     GL_CALL(frag_handle = glCreateShader(GL_FRAGMENT_SHADER));
     glShaderSource(frag_handle, 2, fragment_shader_with_version, nullptr);
     glCompileShader(frag_handle);
-    if (!CheckShader(frag_handle, "fragment shader"))
-        return false;
+    CheckShader(frag_handle, "fragment shader");
 
     // Link
     bd->ShaderHandle = glCreateProgram();
     glAttachShader(bd->ShaderHandle, vert_handle);
     glAttachShader(bd->ShaderHandle, frag_handle);
     glLinkProgram(bd->ShaderHandle);
-    if (!CheckProgram(bd->ShaderHandle, "shader program"))
-        return false;
+    CheckProgram(bd->ShaderHandle, "shader program");
 
     glDetachShader(bd->ShaderHandle, vert_handle);
     glDetachShader(bd->ShaderHandle, frag_handle);
@@ -913,19 +942,7 @@ bool    ImGui_ImplOpenGL3_CreateDeviceObjects()
     glGenBuffers(1, &bd->VboHandle);
     glGenBuffers(1, &bd->ElementsHandle);
 
-#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
-    if (bd->HasBindSampler)
-    {
-        glGenSamplers(2, &bd->TexSamplers[0]);
-        for (int sampler_n = 0; sampler_n < 2; sampler_n++)
-        {
-            GL_CALL(glSamplerParameteri(bd->TexSamplers[sampler_n], GL_TEXTURE_MIN_FILTER, (sampler_n == 0) ? GL_LINEAR : GL_NEAREST));
-            GL_CALL(glSamplerParameteri(bd->TexSamplers[sampler_n], GL_TEXTURE_MAG_FILTER, (sampler_n == 0) ? GL_LINEAR : GL_NEAREST));
-            GL_CALL(glSamplerParameteri(bd->TexSamplers[sampler_n], GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
-            GL_CALL(glSamplerParameteri(bd->TexSamplers[sampler_n], GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
-        }
-    }
-#endif
+    ImGui_ImplOpenGL3_CreateFontsTexture();
 
     // Restore modified GL state
     glBindTexture(GL_TEXTURE_2D, last_texture);
@@ -942,153 +959,39 @@ bool    ImGui_ImplOpenGL3_CreateDeviceObjects()
 
 void    ImGui_ImplOpenGL3_DestroyDeviceObjects()
 {
-    ImGui_ImplOpenGL3_InitLoader();
     ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
-    if (bd->TexSamplers[0]) { glDeleteSamplers(2, &bd->TexSamplers[0]); bd->TexSamplers[0] = bd->TexSamplers[1] = 0; }
     if (bd->VboHandle)      { glDeleteBuffers(1, &bd->VboHandle); bd->VboHandle = 0; }
     if (bd->ElementsHandle) { glDeleteBuffers(1, &bd->ElementsHandle); bd->ElementsHandle = 0; }
     if (bd->ShaderHandle)   { glDeleteProgram(bd->ShaderHandle); bd->ShaderHandle = 0; }
-
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-            ImGui_ImplOpenGL3_DestroyTexture(tex);
+    ImGui_ImplOpenGL3_DestroyFontsTexture();
 }
 
-bool    ImGui_ImplOpenGL3_Init(const char* glsl_version)
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+static void ImGui_ImplOpenGL3_RenderWindow(ImGuiViewport* viewport, void*)
 {
-    ImGuiIO& io = ImGui::GetIO();
-    IMGUI_CHECKVERSION();
-    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
-
-    // Initialize loader
-    if (!ImGui_ImplOpenGL3_InitLoader())
-        return false;
-
-    // Setup backend capabilities flags
-    ImGui_ImplOpenGL3_Data* bd = IM_NEW(ImGui_ImplOpenGL3_Data)();
-    io.BackendRendererUserData = (void*)bd;
-    io.BackendRendererName = "imgui_impl_opengl3";
-
-    // Query for GL version (e.g. 320 for GL 3.2)
-    const char* gl_version_str = (const char*)glGetString(GL_VERSION);
-#if defined(IMGUI_IMPL_OPENGL_ES2)
-    // GLES 2
-    bd->GlVersion = 200;
-    bd->GlProfileIsES2 = true;
-    IM_UNUSED(gl_version_str);
-#else
-    // Desktop or GLES 3
-    GLint major = 0;
-    GLint minor = 0;
-    glGetIntegerv(GL_MAJOR_VERSION, &major);
-    glGetIntegerv(GL_MINOR_VERSION, &minor);
-    if (major == 0 && minor == 0)
-        sscanf(gl_version_str, "%d.%d", &major, &minor); // Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
-    bd->GlVersion = (GLuint)(major * 100 + minor * 10);
-    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &bd->MaxTextureSize);
-
-#if defined(IMGUI_IMPL_OPENGL_ES3)
-    bd->GlProfileIsES3 = true;
-#else
-    if (strncmp(gl_version_str, "OpenGL ES 3", 11) == 0)
-        bd->GlProfileIsES3 = true;
-#endif
-
-#if defined(GL_CONTEXT_PROFILE_MASK)
-    if (!bd->GlProfileIsES3 && bd->GlVersion >= 320)
-        glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &bd->GlProfileMask);
-    bd->GlProfileIsCompat = (bd->GlProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) != 0;
-#endif
-
-    bd->UseBufferSubData = false;
-    /*
-    // Query vendor to enable glBufferSubData kludge
-#ifdef _WIN32
-    if (const char* vendor = (const char*)glGetString(GL_VENDOR))
-        if (strncmp(vendor, "Intel", 5) == 0)
-            bd->UseBufferSubData = true;
-#endif
-    */
-#endif
-
-#ifdef IMGUI_IMPL_OPENGL_DEBUG
-    printf("GlVersion = %d, \"%s\"\nGlProfileIsCompat = %d\nGlProfileMask = 0x%X\nGlProfileIsES2/IsEs3 = %d/%d\nGL_VENDOR = '%s'\nGL_RENDERER = '%s'\n", bd->GlVersion, gl_version_str, bd->GlProfileIsCompat, bd->GlProfileMask, bd->GlProfileIsES2, bd->GlProfileIsES3, (const char*)glGetString(GL_VENDOR), (const char*)glGetString(GL_RENDERER)); // [DEBUG]
-#endif
-
-#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
-    if (bd->GlVersion >= 320)
-        io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-#endif
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;       // We can honor ImGuiPlatformIO::Textures[] requests during render.
-
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = (int)bd->MaxTextureSize;
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplOpenGL3_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplOpenGL3_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplOpenGL3_DrawCallback_SetSamplerNearest;
-
-    // Store GLSL version string so we can refer to it later in case we recreate shaders.
-    // Note: GLSL version is NOT the same as GL version. Leave this to nullptr if unsure.
-    if (glsl_version == nullptr)
+    if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
     {
-#if defined(IMGUI_IMPL_OPENGL_ES2)
-        glsl_version = "#version 100";
-#elif defined(IMGUI_IMPL_OPENGL_ES3)
-        glsl_version = "#version 300 es";
-#elif defined(__APPLE__)
-        glsl_version = "#version 150";
-#else
-        glsl_version = "#version 130";
-#endif
+        ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);
+        glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
+        glClear(GL_COLOR_BUFFER_BIT);
     }
-    IM_ASSERT((int)strlen(glsl_version) + 2 < IM_COUNTOF(bd->GlslVersionString));
-    strcpy(bd->GlslVersionString, glsl_version);
-    strcat(bd->GlslVersionString, "\n");
-
-    // Make an arbitrary GL call (we don't actually need the result)
-    // IF YOU GET A CRASH HERE: it probably means the OpenGL function loader didn't do its job. Let us know!
-    GLint current_texture;
-    glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
-
-    // Detect extensions we support
-#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
-    bd->HasPolygonMode = (!bd->GlProfileIsES2 && !bd->GlProfileIsES3);
-#endif
-#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
-    bd->HasBindSampler = (bd->GlVersion >= 330 || bd->GlProfileIsES3);
-#endif
-    bd->HasClipOrigin = (bd->GlVersion >= 450);
-#ifdef IMGUI_IMPL_OPENGL_HAS_EXTENSIONS
-    GLint num_extensions = 0;
-    glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
-    for (GLint i = 0; i < num_extensions; i++)
-    {
-        const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
-        if (extension != nullptr && strcmp(extension, "GL_ARB_clip_control") == 0)
-            bd->HasClipOrigin = true;
-    }
-#endif
-
-    return true;
+    ImGui_ImplOpenGL3_RenderDrawData(viewport->DrawData);
 }
 
-void    ImGui_ImplOpenGL3_Shutdown()
+static void ImGui_ImplOpenGL3_InitMultiViewportSupport()
 {
-    ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
-    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
-    ImGuiIO& io = ImGui::GetIO();
     ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Renderer_RenderWindow = ImGui_ImplOpenGL3_RenderWindow;
+}
 
-    ImGui_ImplOpenGL3_DestroyDeviceObjects();
-
-    io.BackendRendererName = nullptr;
-    io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
-    IM_DELETE(bd);
-
-    ImGui_ImplOpenGL3_ShutdownLoader();
+static void ImGui_ImplOpenGL3_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
 }
 
 //-----------------------------------------------------------------------------

backends/imgui_impl_opengl3.h

@@ -4,9 +4,9 @@
 // This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
 //  [x] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset) [Desktop OpenGL only!]
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // About WebGL/ES:
 // - You need to '#define IMGUI_IMPL_OPENGL_ES2' or '#define IMGUI_IMPL_OPENGL_ES3' to use WebGL or OpenGL ES.
@@ -37,12 +37,11 @@ IMGUI_IMPL_API void     ImGui_ImplOpenGL3_NewFrame();
 IMGUI_IMPL_API void     ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data);
 
 // (Optional) Called by Init/NewFrame/Shutdown
+IMGUI_IMPL_API bool     ImGui_ImplOpenGL3_CreateFontsTexture();
+IMGUI_IMPL_API void     ImGui_ImplOpenGL3_DestroyFontsTexture();
 IMGUI_IMPL_API bool     ImGui_ImplOpenGL3_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplOpenGL3_DestroyDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplOpenGL3_UpdateTexture(ImTextureData* tex);
-
 // Configuration flags to add in your imconfig file:
 //#define IMGUI_IMPL_OPENGL_ES2     // Enable ES 2 (Auto-detected on Emscripten)
 //#define IMGUI_IMPL_OPENGL_ES3     // Enable ES 3 (Auto-detected on iOS/Android)

backends/imgui_impl_opengl3_loader.h

@@ -166,9 +166,7 @@ typedef khronos_uint8_t GLubyte;
 #define GL_SCISSOR_BOX                    0x0C10
 #define GL_SCISSOR_TEST                   0x0C11
 #define GL_UNPACK_ROW_LENGTH              0x0CF2
-#define GL_UNPACK_ALIGNMENT               0x0CF5
 #define GL_PACK_ALIGNMENT                 0x0D05
-#define GL_MAX_TEXTURE_SIZE               0x0D33
 #define GL_TEXTURE_2D                     0x0DE1
 #define GL_UNSIGNED_BYTE                  0x1401
 #define GL_UNSIGNED_SHORT                 0x1403
@@ -180,7 +178,6 @@ typedef khronos_uint8_t GLubyte;
 #define GL_RENDERER                       0x1F01
 #define GL_VERSION                        0x1F02
 #define GL_EXTENSIONS                     0x1F03
-#define GL_NEAREST                        0x2600
 #define GL_LINEAR                         0x2601
 #define GL_TEXTURE_MAG_FILTER             0x2800
 #define GL_TEXTURE_MIN_FILTER             0x2801
@@ -227,13 +224,11 @@ typedef khronos_float_t GLclampf;
 typedef double GLclampd;
 #define GL_TEXTURE_BINDING_2D             0x8069
 typedef void (APIENTRYP PFNGLDRAWELEMENTSPROC) (GLenum mode, GLsizei count, GLenum type, const void *indices);
-typedef void (APIENTRYP PFNGLTEXSUBIMAGE2DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void *pixels);
 typedef void (APIENTRYP PFNGLBINDTEXTUREPROC) (GLenum target, GLuint texture);
 typedef void (APIENTRYP PFNGLDELETETEXTURESPROC) (GLsizei n, const GLuint *textures);
 typedef void (APIENTRYP PFNGLGENTEXTURESPROC) (GLsizei n, GLuint *textures);
 #ifdef GL_GLEXT_PROTOTYPES
 GLAPI void APIENTRY glDrawElements (GLenum mode, GLsizei count, GLenum type, const void *indices);
-GLAPI void APIENTRY glTexSubImage2D (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void *pixels);
 GLAPI void APIENTRY glBindTexture (GLenum target, GLuint texture);
 GLAPI void APIENTRY glDeleteTextures (GLsizei n, const GLuint *textures);
 GLAPI void APIENTRY glGenTextures (GLsizei n, GLuint *textures);
@@ -401,15 +396,9 @@ GLAPI void APIENTRY glDrawElementsBaseVertex (GLenum mode, GLsizei count, GLenum
 #ifndef GL_VERSION_3_3
 #define GL_VERSION_3_3 1
 #define GL_SAMPLER_BINDING                0x8919
-typedef void (APIENTRYP PFNGLGENSAMPLERSPROC) (GLsizei count, GLuint *samplers);
-typedef void (APIENTRYP PFNGLDELETESAMPLERSPROC) (GLsizei count, const GLuint *samplers);
 typedef void (APIENTRYP PFNGLBINDSAMPLERPROC) (GLuint unit, GLuint sampler);
-typedef void (APIENTRYP PFNGLSAMPLERPARAMETERIPROC) (GLuint sampler, GLenum pname, GLint param);
 #ifdef GL_GLEXT_PROTOTYPES
-GLAPI void APIENTRY glGenSamplers (GLsizei count, GLuint *samplers);
-GLAPI void APIENTRY glDeleteSamplers (GLsizei count, const GLuint *samplers);
 GLAPI void APIENTRY glBindSampler (GLuint unit, GLuint sampler);
-GLAPI void APIENTRY glSamplerParameteri (GLuint sampler, GLenum pname, GLint param);
 #endif
 #endif /* GL_VERSION_3_3 */
 #ifndef GL_VERSION_4_1
@@ -484,13 +473,12 @@ typedef GL3WglProc (*GL3WGetProcAddressProc)(const char *proc);
 /* gl3w api */
 GL3W_API int imgl3wInit(void);
 GL3W_API int imgl3wInit2(GL3WGetProcAddressProc proc);
-GL3W_API void imgl3wShutdown(void);
 GL3W_API int imgl3wIsSupported(int major, int minor);
 GL3W_API GL3WglProc imgl3wGetProcAddress(const char *proc);
 
 /* gl3w internal state */
 union ImGL3WProcs {
-    GL3WglProc ptr[63];
+    GL3WglProc ptr[59];
     struct {
         PFNGLACTIVETEXTUREPROC            ActiveTexture;
         PFNGLATTACHSHADERPROC             AttachShader;
@@ -510,7 +498,6 @@ union ImGL3WProcs {
         PFNGLCREATESHADERPROC             CreateShader;
         PFNGLDELETEBUFFERSPROC            DeleteBuffers;
         PFNGLDELETEPROGRAMPROC            DeleteProgram;
-        PFNGLDELETESAMPLERSPROC           DeleteSamplers;
         PFNGLDELETESHADERPROC             DeleteShader;
         PFNGLDELETETEXTURESPROC           DeleteTextures;
         PFNGLDELETEVERTEXARRAYSPROC       DeleteVertexArrays;
@@ -523,7 +510,6 @@ union ImGL3WProcs {
         PFNGLENABLEVERTEXATTRIBARRAYPROC  EnableVertexAttribArray;
         PFNGLFLUSHPROC                    Flush;
         PFNGLGENBUFFERSPROC               GenBuffers;
-        PFNGLGENSAMPLERSPROC              GenSamplers;
         PFNGLGENTEXTURESPROC              GenTextures;
         PFNGLGENVERTEXARRAYSPROC          GenVertexArrays;
         PFNGLGETATTRIBLOCATIONPROC        GetAttribLocation;
@@ -544,12 +530,10 @@ union ImGL3WProcs {
         PFNGLPIXELSTOREIPROC              PixelStorei;
         PFNGLPOLYGONMODEPROC              PolygonMode;
         PFNGLREADPIXELSPROC               ReadPixels;
-        PFNGLSAMPLERPARAMETERIPROC        SamplerParameteri;
         PFNGLSCISSORPROC                  Scissor;
         PFNGLSHADERSOURCEPROC             ShaderSource;
         PFNGLTEXIMAGE2DPROC               TexImage2D;
         PFNGLTEXPARAMETERIPROC            TexParameteri;
-        PFNGLTEXSUBIMAGE2DPROC            TexSubImage2D;
         PFNGLUNIFORM1IPROC                Uniform1i;
         PFNGLUNIFORMMATRIX4FVPROC         UniformMatrix4fv;
         PFNGLUSEPROGRAMPROC               UseProgram;
@@ -579,7 +563,6 @@ GL3W_API extern union ImGL3WProcs imgl3wProcs;
 #define glCreateShader                    imgl3wProcs.gl.CreateShader
 #define glDeleteBuffers                   imgl3wProcs.gl.DeleteBuffers
 #define glDeleteProgram                   imgl3wProcs.gl.DeleteProgram
-#define glDeleteSamplers                  imgl3wProcs.gl.DeleteSamplers
 #define glDeleteShader                    imgl3wProcs.gl.DeleteShader
 #define glDeleteTextures                  imgl3wProcs.gl.DeleteTextures
 #define glDeleteVertexArrays              imgl3wProcs.gl.DeleteVertexArrays
@@ -592,7 +575,6 @@ GL3W_API extern union ImGL3WProcs imgl3wProcs;
 #define glEnableVertexAttribArray         imgl3wProcs.gl.EnableVertexAttribArray
 #define glFlush                           imgl3wProcs.gl.Flush
 #define glGenBuffers                      imgl3wProcs.gl.GenBuffers
-#define glGenSamplers                     imgl3wProcs.gl.GenSamplers
 #define glGenTextures                     imgl3wProcs.gl.GenTextures
 #define glGenVertexArrays                 imgl3wProcs.gl.GenVertexArrays
 #define glGetAttribLocation               imgl3wProcs.gl.GetAttribLocation
@@ -613,12 +595,10 @@ GL3W_API extern union ImGL3WProcs imgl3wProcs;
 #define glPixelStorei                     imgl3wProcs.gl.PixelStorei
 #define glPolygonMode                     imgl3wProcs.gl.PolygonMode
 #define glReadPixels                      imgl3wProcs.gl.ReadPixels
-#define glSamplerParameteri               imgl3wProcs.gl.SamplerParameteri
 #define glScissor                         imgl3wProcs.gl.Scissor
 #define glShaderSource                    imgl3wProcs.gl.ShaderSource
 #define glTexImage2D                      imgl3wProcs.gl.TexImage2D
 #define glTexParameteri                   imgl3wProcs.gl.TexParameteri
-#define glTexSubImage2D                   imgl3wProcs.gl.TexSubImage2D
 #define glUniform1i                       imgl3wProcs.gl.Uniform1i
 #define glUniformMatrix4fv                imgl3wProcs.gl.UniformMatrix4fv
 #define glUseProgram                      imgl3wProcs.gl.UseProgram
@@ -646,7 +626,7 @@ extern "C" {
 #endif
 #include <windows.h>
 
-static HMODULE libgl = NULL;
+static HMODULE libgl;
 typedef PROC(__stdcall* GL3WglGetProcAddr)(LPCSTR);
 static GL3WglGetProcAddr wgl_get_proc_address;
 
@@ -659,7 +639,7 @@ static int open_libgl(void)
     return GL3W_OK;
 }
 
-static void close_libgl(void) { FreeLibrary(libgl); libgl = NULL; }
+static void close_libgl(void) { FreeLibrary(libgl); }
 static GL3WglProc get_proc(const char *proc)
 {
     GL3WglProc res;
@@ -671,7 +651,7 @@ static GL3WglProc get_proc(const char *proc)
 #elif defined(__APPLE__)
 #include <dlfcn.h>
 
-static void *libgl = NULL;
+static void *libgl;
 static int open_libgl(void)
 {
     libgl = dlopen("/System/Library/Frameworks/OpenGL.framework/OpenGL", RTLD_LAZY | RTLD_LOCAL);
@@ -680,7 +660,7 @@ static int open_libgl(void)
     return GL3W_OK;
 }
 
-static void close_libgl(void) { dlclose(libgl); libgl = NULL; }
+static void close_libgl(void) { dlclose(libgl); }
 
 static GL3WglProc get_proc(const char *proc)
 {
@@ -714,11 +694,7 @@ static void close_libgl(void)
 
 static int is_library_loaded(const char* name, void** lib)
 {
-#if defined(__HAIKU__)
-    *lib = NULL; // no support for RTLD_NOLOAD on Haiku.
-#else
     *lib = dlopen(name, RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
-#endif
     return *lib != NULL;
 }
 
@@ -836,7 +812,6 @@ static int parse_version(void)
 }
 
 static void load_procs(GL3WGetProcAddressProc proc);
-static void clear_procs();
 
 int imgl3wInit(void)
 {
@@ -853,12 +828,6 @@ int imgl3wInit2(GL3WGetProcAddressProc proc)
     return parse_version();
 }
 
-void imgl3wShutdown(void)
-{
-    close_libgl();
-    clear_procs();
-}
-
 int imgl3wIsSupported(int major, int minor)
 {
     if (major < 2)
@@ -889,7 +858,6 @@ static const char *proc_names[] = {
     "glCreateShader",
     "glDeleteBuffers",
     "glDeleteProgram",
-    "glDeleteSamplers",
     "glDeleteShader",
     "glDeleteTextures",
     "glDeleteVertexArrays",
@@ -902,7 +870,6 @@ static const char *proc_names[] = {
     "glEnableVertexAttribArray",
     "glFlush",
     "glGenBuffers",
-    "glGenSamplers",
     "glGenTextures",
     "glGenVertexArrays",
     "glGetAttribLocation",
@@ -923,12 +890,10 @@ static const char *proc_names[] = {
     "glPixelStorei",
     "glPolygonMode",
     "glReadPixels",
-    "glSamplerParameteri",
     "glScissor",
     "glShaderSource",
     "glTexImage2D",
     "glTexParameteri",
-    "glTexSubImage2D",
     "glUniform1i",
     "glUniformMatrix4fv",
     "glUseProgram",
@@ -945,13 +910,6 @@ static void load_procs(GL3WGetProcAddressProc proc)
         imgl3wProcs.ptr[i] = proc(proc_names[i]);
 }
 
-static void clear_procs()
-{
-    size_t i;
-    for (i = 0; i < GL3W_ARRAY_SIZE(proc_names); i++)
-        imgl3wProcs.ptr[i] = nullptr;
-}
-
 #ifdef __cplusplus
 }
 #endif

backends/imgui_impl_osx.h

@@ -7,9 +7,13 @@
 //  [X] Platform: Clipboard support is part of core Dear ImGui (no specific code in this backend).
 //  [X] Platform: Mouse support. Can discriminate Mouse/Pen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy kVK_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
 //  [X] Platform: IME support.
+//  [x] Platform: Multi-viewport / platform windows.
+// Issues:
+//  [ ] Platform: Multi-viewport: Window size not correctly reported when enabling io.ConfigViewportsNoDecoration
+//  [ ] Platform: Multi-viewport: ParentViewportID not honored, and so io.ConfigViewportsNoDefaultParent has no effect (minor).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -19,7 +23,6 @@
 // - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
 // - Introduction, links and more at the top of imgui.cpp
 
-#pragma once
 #include "imgui.h"      // IMGUI_IMPL_API
 #ifndef IMGUI_DISABLE
 

backends/imgui_impl_osx.mm

@@ -7,9 +7,13 @@
 //  [X] Platform: Clipboard support is part of core Dear ImGui (no specific code in this backend).
 //  [X] Platform: Mouse support. Can discriminate Mouse/Pen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy kVK_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
 //  [X] Platform: IME support.
+//  [x] Platform: Multi-viewport / platform windows.
+// Issues:
+//  [ ] Platform: Multi-viewport: Window size not correctly reported when enabling io.ConfigViewportsNoDecoration
+//  [ ] Platform: Multi-viewport: ParentViewportID not honored, and so io.ConfigViewportsNoDefaultParent has no effect (minor).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -29,11 +33,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2025-09-18: Call platform_io.ClearPlatformHandlers() on shutdown.
-//  2025-06-27: Added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress mouse cursor support.
-//  2025-06-12: ImGui_ImplOSX_HandleEvent() only process event for window containing our view. (#8644)
-//  2025-03-21: Fill gamepad inputs and set ImGuiBackendFlags_HasGamepad regardless of ImGuiConfigFlags_NavEnableGamepad being set.
-//  2025-01-20: Removed notification observer when shutting down. (#8331)
+//  2025-XX-XX: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
 //               - io.GetClipboardTextFn    -> platform_io.Platform_GetClipboardTextFn
 //               - io.SetClipboardTextFn    -> platform_io.Platform_SetClipboardTextFn
@@ -41,7 +41,7 @@
 //  2024-07-02: Update for io.SetPlatformImeDataFn() -> io.PlatformSetImeDataFn() renaming in main library.
 //  2023-10-05: Inputs: Added support for extra ImGuiKey values: F13 to F20 function keys. Stopped mapping F13 into PrintScreen.
 //  2023-04-09: Inputs: Added support for io.AddMouseSourceEvent() to discriminate ImGuiMouseSource_Mouse/ImGuiMouseSource_Pen.
-//  2023-02-01: Fixed scroll wheel scaling for devices emitting events with hasPreciseScrollingDeltas==false (e.g. non-Apple mice).
+//  2023-02-01: Fixed scroll wheel scaling for devices emitting events with hasPreciseScrollingDeltas==false (e.g. non-Apple mices).
 //  2022-11-02: Fixed mouse coordinates before clicking the host window.
 //  2022-10-06: Fixed mouse inputs on flipped views.
 //  2022-09-26: Inputs: Renamed ImGuiKey_ModXXX introduced in 1.87 to ImGuiMod_XXX (old names still supported).
@@ -101,6 +101,9 @@ static void                     ImGui_ImplOSX_DestroyBackendData()  { IM_DELETE(
 static inline CFTimeInterval    GetMachAbsoluteTimeInSeconds()      { return (CFTimeInterval)(double)(clock_gettime_nsec_np(CLOCK_UPTIME_RAW) / 1e9); }
 
 // Forward Declarations
+static void ImGui_ImplOSX_InitMultiViewportSupport();
+static void ImGui_ImplOSX_ShutdownMultiViewportSupport();
+static void ImGui_ImplOSX_UpdateMonitors();
 static void ImGui_ImplOSX_AddTrackingArea(NSView* _Nonnull view);
 static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view);
 
@@ -110,7 +113,6 @@ static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view);
 + (id)_windowResizeNorthEastSouthWestCursor;
 + (id)_windowResizeNorthSouthCursor;
 + (id)_windowResizeEastWestCursor;
-+ (id)busyButClickableCursor;
 @end
 
 /**
@@ -148,6 +150,20 @@ static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view);
     NSWindow* window = view.window;
     if (!window)
         return;
+
+    ImGuiIO& io = ImGui::GetIO();
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        NSRect frame = window.frame;
+        NSRect contentRect = window.contentLayoutRect;
+        if (window.styleMask & NSWindowStyleMaskFullSizeContentView) // No title bar windows should be considered.
+            contentRect = frame;
+
+        NSRect firstScreenFrame = NSScreen.screens[0].frame;
+        _imeRect = NSMakeRect(_posX, _posY, 0, 0);
+        _imeRect.origin.y = firstScreenFrame.size.height - _imeRect.size.height - _imeRect.origin.y; // Opposite of ConvertNSRect()
+    }
+    else
     {
         NSRect contentRect = [window contentRectForFrameRect:window.frame];
         NSRect rect = NSMakeRect(_posX, contentRect.size.height - _posY, 0, 0);
@@ -247,6 +263,7 @@ static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view);
 
 - (void)onApplicationBecomeActive:(NSNotification*)aNotification;
 - (void)onApplicationBecomeInactive:(NSNotification*)aNotification;
+- (void)displaysDidChange:(NSNotification*)aNotification;
 
 @end
 
@@ -264,6 +281,11 @@ static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view);
     io.AddFocusEvent(false);
 }
 
+- (void)displaysDidChange:(NSNotification*)aNotification
+{
+    ImGui_ImplOSX_UpdateMonitors();
+}
+
 @end
 
 // Functions
@@ -418,24 +440,27 @@ bool ImGui_ImplOSX_Init(NSView* view)
     io.BackendPlatformName = "imgui_impl_osx";
     io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;           // We can honor GetMouseCursor() values (optional)
     //io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos;          // We can honor io.WantSetMousePos requests (optional, rarely used)
+    io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports;      // We can create multi-viewports on the Platform side (optional)
+    //io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport; // We can call io.AddMouseViewportEvent() with correct data (optional)
 
     bd->Observer = [ImGuiObserver new];
     bd->Window = view.window ?: NSApp.orderedWindows.firstObject;
     ImGuiViewport* main_viewport = ImGui::GetMainViewport();
     main_viewport->PlatformHandle = main_viewport->PlatformHandleRaw = (__bridge_retained void*)bd->Window;
+    ImGui_ImplOSX_UpdateMonitors();
+    ImGui_ImplOSX_InitMultiViewportSupport();
 
     // Load cursors. Some of them are undocumented.
     bd->MouseCursorHidden = false;
     bd->MouseCursors[ImGuiMouseCursor_Arrow] = [NSCursor arrowCursor];
     bd->MouseCursors[ImGuiMouseCursor_TextInput] = [NSCursor IBeamCursor];
     bd->MouseCursors[ImGuiMouseCursor_ResizeAll] = [NSCursor closedHandCursor];
+    bd->MouseCursors[ImGuiMouseCursor_Hand] = [NSCursor pointingHandCursor];
+    bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = [NSCursor operationNotAllowedCursor];
     bd->MouseCursors[ImGuiMouseCursor_ResizeNS] = [NSCursor respondsToSelector:@selector(_windowResizeNorthSouthCursor)] ? [NSCursor _windowResizeNorthSouthCursor] : [NSCursor resizeUpDownCursor];
     bd->MouseCursors[ImGuiMouseCursor_ResizeEW] = [NSCursor respondsToSelector:@selector(_windowResizeEastWestCursor)] ? [NSCursor _windowResizeEastWestCursor] : [NSCursor resizeLeftRightCursor];
     bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = [NSCursor respondsToSelector:@selector(_windowResizeNorthEastSouthWestCursor)] ? [NSCursor _windowResizeNorthEastSouthWestCursor] : [NSCursor closedHandCursor];
     bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = [NSCursor respondsToSelector:@selector(_windowResizeNorthWestSouthEastCursor)] ? [NSCursor _windowResizeNorthWestSouthEastCursor] : [NSCursor closedHandCursor];
-    bd->MouseCursors[ImGuiMouseCursor_Hand] = [NSCursor pointingHandCursor];
-    bd->MouseCursors[ImGuiMouseCursor_Wait] = bd->MouseCursors[ImGuiMouseCursor_Progress] = [NSCursor respondsToSelector:@selector(busyButClickableCursor)] ? [NSCursor busyButClickableCursor] : [NSCursor arrowCursor];
-    bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = [NSCursor operationNotAllowedCursor];
 
     // Note that imgui.cpp also include default OSX clipboard handlers which can be enabled
     // by adding '#define IMGUI_ENABLE_OSX_DEFAULT_CLIPBOARD_FUNCTIONS' in imconfig.h and adding '-framework ApplicationServices' to your linker command-line.
@@ -482,7 +507,7 @@ bool ImGui_ImplOSX_Init(NSView* view)
     [view addSubview:bd->KeyEventResponder];
     ImGui_ImplOSX_AddTrackingArea(view);
 
-    platform_io.Platform_SetImeDataFn = [](ImGuiContext*, ImGuiViewport*, ImGuiPlatformImeData* data) -> void
+    platform_io.Platform_SetImeDataFn = [](ImGuiContext*, ImGuiViewport* viewport, ImGuiPlatformImeData* data) -> void
     {
         ImGui_ImplOSX_Data* bd = ImGui_ImplOSX_GetBackendData();
         if (data->WantVisible)
@@ -506,7 +531,6 @@ void ImGui_ImplOSX_Shutdown()
     ImGui_ImplOSX_Data* bd = ImGui_ImplOSX_GetBackendData();
     IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
 
-    [[NSNotificationCenter defaultCenter] removeObserver:bd->Observer];
     bd->Observer = nullptr;
     if (bd->Monitor != nullptr)
     {
@@ -514,15 +538,12 @@ void ImGui_ImplOSX_Shutdown()
         bd->Monitor = nullptr;
     }
 
+    ImGui_ImplOSX_ShutdownMultiViewportSupport();
     ImGui_ImplOSX_DestroyBackendData();
-
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-
     io.BackendPlatformName = nullptr;
     io.BackendPlatformUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasGamepad);
-    platform_io.ClearPlatformHandlers();
+    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasGamepad | ImGuiBackendFlags_PlatformHasViewports);
 }
 
 static void ImGui_ImplOSX_UpdateMouseCursor()
@@ -545,7 +566,7 @@ static void ImGui_ImplOSX_UpdateMouseCursor()
     else
     {
         NSCursor* desired = bd->MouseCursors[imgui_cursor] ?: bd->MouseCursors[ImGuiMouseCursor_Arrow];
-        // -[NSCursor set] generates measurable overhead if called unconditionally.
+        // -[NSCursor set] generates measureable overhead if called unconditionally.
         if (desired != NSCursor.currentCursor)
         {
             [desired set];
@@ -561,6 +582,8 @@ static void ImGui_ImplOSX_UpdateMouseCursor()
 static void ImGui_ImplOSX_UpdateGamepads()
 {
     ImGuiIO& io = ImGui::GetIO();
+    if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0) // FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
+        return;
 
 #if APPLE_HAS_CONTROLLER
     GCController* controller = GCController.current;
@@ -631,9 +654,9 @@ void ImGui_ImplOSX_NewFrame(NSView* view)
     // Setup display size
     if (view)
     {
-        const float fb_scale = (float)[view.window backingScaleFactor];
+        const float dpi = (float)[view.window backingScaleFactor];
         io.DisplaySize = ImVec2((float)view.bounds.size.width, (float)view.bounds.size.height);
-        io.DisplayFramebufferScale = ImVec2(fb_scale, fb_scale);
+        io.DisplayFramebufferScale = ImVec2(dpi, dpi);
     }
 
     // Setup time step
@@ -671,9 +694,6 @@ static ImGuiMouseSource GetMouseSource(NSEvent* event)
 
 static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view)
 {
-    // Only process events from the window containing ImGui view
-    if (event.window != view.window)
-        return false;
     ImGuiIO& io = ImGui::GetIO();
 
     if (event.type == NSEventTypeLeftMouseDown || event.type == NSEventTypeRightMouseDown || event.type == NSEventTypeOtherMouseDown)
@@ -700,14 +720,23 @@ static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view)
 
     if (event.type == NSEventTypeMouseMoved || event.type == NSEventTypeLeftMouseDragged || event.type == NSEventTypeRightMouseDragged || event.type == NSEventTypeOtherMouseDragged)
     {
-        NSPoint mousePoint = event.locationInWindow;
-        if (event.window == nil)
-            mousePoint = [[view window] convertPointFromScreen:mousePoint];
-        mousePoint = [view convertPoint:mousePoint fromView:nil];
-        if ([view isFlipped])
-            mousePoint = NSMakePoint(mousePoint.x, mousePoint.y);
+        NSPoint mousePoint;
+        if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+        {
+            mousePoint = NSEvent.mouseLocation;
+            mousePoint.y = CGDisplayPixelsHigh(kCGDirectMainDisplay) - mousePoint.y; // Normalize y coordinate to top-left of main display.
+        }
         else
-            mousePoint = NSMakePoint(mousePoint.x, view.bounds.size.height - mousePoint.y);
+        {
+            mousePoint = event.locationInWindow;
+            if (event.window == nil)
+                mousePoint = [[view window] convertPointFromScreen:mousePoint];
+            mousePoint = [view convertPoint:mousePoint fromView:nil]; // Convert to local coordinates of view
+            if ([view isFlipped])
+                mousePoint = NSMakePoint(mousePoint.x, mousePoint.y);
+            else
+                mousePoint = NSMakePoint(mousePoint.x, view.bounds.size.height - mousePoint.y);
+        }
         io.AddMouseSourceEvent(GetMouseSource(event));
         io.AddMousePosEvent((float)mousePoint.x, (float)mousePoint.y);
         return io.WantCaptureMouse;
@@ -799,6 +828,8 @@ static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view)
                 default:
                     return io.WantCaptureKeyboard;
             }
+
+            NSEventModifierFlags modifier_flags = [event modifierFlags];
             io.AddKeyEvent(key, (modifier_flags & mask) != 0);
             io.SetKeyEventNativeData(key, key_code, -1); // To support legacy indexing (<1.87 user code)
         }
@@ -833,6 +864,294 @@ static void ImGui_ImplOSX_AddTrackingArea(NSView* _Nonnull view)
     }];
 }
 
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the back-end to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+struct ImGuiViewportDataOSX
+{
+    NSWindow*               Window;
+    bool                    WindowOwned;
+
+    ImGuiViewportDataOSX()  { WindowOwned = false; }
+    ~ImGuiViewportDataOSX() { IM_ASSERT(Window == nil); }
+};
+
+@interface ImGui_ImplOSX_Window: NSWindow
+@end
+
+@implementation ImGui_ImplOSX_Window
+
+- (BOOL)canBecomeKeyWindow
+{
+    return YES;
+}
+
+@end
+
+static void ConvertNSRect(NSRect* r)
+{
+    NSRect firstScreenFrame = NSScreen.screens[0].frame;
+    IM_ASSERT(firstScreenFrame.origin.x == 0 && firstScreenFrame.origin.y == 0);
+    r->origin.y = firstScreenFrame.size.height - r->origin.y - r->size.height;
+}
+
+static void ImGui_ImplOSX_CreateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplOSX_Data* bd = ImGui_ImplOSX_GetBackendData();
+    ImGuiViewportDataOSX* data = IM_NEW(ImGuiViewportDataOSX)();
+    viewport->PlatformUserData = data;
+
+    NSScreen* screen = bd->Window.screen;
+    NSRect rect = NSMakeRect(viewport->Pos.x, viewport->Pos.y, viewport->Size.x, viewport->Size.y);
+    ConvertNSRect(&rect);
+
+    NSWindowStyleMask styleMask = 0;
+    if (viewport->Flags & ImGuiViewportFlags_NoDecoration)
+        styleMask |= NSWindowStyleMaskBorderless;
+    else
+        styleMask |= NSWindowStyleMaskTitled | NSWindowStyleMaskResizable | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable;
+
+    NSWindow* window = [[ImGui_ImplOSX_Window alloc] initWithContentRect:rect
+                                                               styleMask:styleMask
+                                                                 backing:NSBackingStoreBuffered
+                                                                   defer:YES
+                                                                  screen:screen];
+    if (viewport->Flags & ImGuiViewportFlags_TopMost)
+        [window setLevel:NSFloatingWindowLevel];
+
+    window.title = @"Untitled";
+    window.opaque = YES;
+
+    KeyEventResponder* view = [[KeyEventResponder alloc] initWithFrame:rect];
+    if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_6 && ceil(NSAppKitVersionNumber) < NSAppKitVersionNumber10_15)
+        [view setWantsBestResolutionOpenGLSurface:YES];
+
+    window.contentView = view;
+
+    data->Window = window;
+    data->WindowOwned = true;
+    viewport->PlatformRequestResize = false;
+    viewport->PlatformHandle = viewport->PlatformHandleRaw = (__bridge_retained void*)window;
+}
+
+static void ImGui_ImplOSX_DestroyWindow(ImGuiViewport* viewport)
+{
+    NSWindow* window = (__bridge_transfer NSWindow*)viewport->PlatformHandleRaw;
+    window = nil;
+
+    if (ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData)
+    {
+        NSWindow* window = data->Window;
+        if (window != nil && data->WindowOwned)
+        {
+            window.contentView = nil;
+            window.contentViewController = nil;
+            [window orderOut:nil];
+        }
+        data->Window = nil;
+        IM_DELETE(data);
+    }
+    viewport->PlatformUserData = viewport->PlatformHandle = viewport->PlatformHandleRaw = nullptr;
+}
+
+static void ImGui_ImplOSX_ShowWindow(ImGuiViewport* viewport)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    if (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing)
+        [data->Window orderFront:nil];
+    else
+        [data->Window makeKeyAndOrderFront:nil];
+
+    [data->Window setIsVisible:YES];
+}
+
+static ImVec2 ImGui_ImplOSX_GetWindowPos(ImGuiViewport* viewport)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    NSWindow* window = data->Window;
+    NSRect frame = window.frame;
+    NSRect contentRect = window.contentLayoutRect;
+    if (window.styleMask & NSWindowStyleMaskFullSizeContentView) // No title bar windows should be considered.
+        contentRect = frame;
+
+    NSRect firstScreenFrame = NSScreen.screens[0].frame;
+    return ImVec2(frame.origin.x, firstScreenFrame.size.height - frame.origin.y - contentRect.size.height);
+}
+
+static void ImGui_ImplOSX_SetWindowPos(ImGuiViewport* viewport, ImVec2 pos)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    NSWindow* window = data->Window;
+    NSSize size = window.frame.size;
+
+    NSRect r = NSMakeRect(pos.x, pos.y, size.width, size.height);
+    ConvertNSRect(&r);
+    [window setFrameOrigin:r.origin];
+}
+
+static ImVec2 ImGui_ImplOSX_GetWindowSize(ImGuiViewport* viewport)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    NSWindow* window = data->Window;
+    NSSize size = window.contentLayoutRect.size;
+    return ImVec2(size.width, size.height);
+}
+
+static void ImGui_ImplOSX_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    NSWindow* window = data->Window;
+    NSRect rect = window.frame;
+    rect.origin.y -= (size.y - rect.size.height);
+    rect.size.width = size.x;
+    rect.size.height = size.y;
+    [window setFrame:rect display:YES];
+}
+
+static void ImGui_ImplOSX_SetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGui_ImplOSX_Data* bd = ImGui_ImplOSX_GetBackendData();
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+    [data->Window makeKeyAndOrderFront:bd->Window];
+}
+
+static bool ImGui_ImplOSX_GetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    return data->Window.isKeyWindow;
+}
+
+static bool ImGui_ImplOSX_GetWindowMinimized(ImGuiViewport* viewport)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    return data->Window.isMiniaturized;
+}
+
+static void ImGui_ImplOSX_SetWindowTitle(ImGuiViewport* viewport, const char* title)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    data->Window.title = [NSString stringWithUTF8String:title];
+}
+
+static void ImGui_ImplOSX_SetWindowAlpha(ImGuiViewport* viewport, float alpha)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+    IM_ASSERT(alpha >= 0.0f && alpha <= 1.0f);
+
+    data->Window.alphaValue = alpha;
+}
+
+static float ImGui_ImplOSX_GetWindowDpiScale(ImGuiViewport* viewport)
+{
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)viewport->PlatformUserData;
+    IM_ASSERT(data->Window != 0);
+
+    return data->Window.backingScaleFactor;
+}
+
+static void ImGui_ImplOSX_UpdateMonitors()
+{
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Monitors.resize(0);
+
+    NSRect firstScreenFrame = NSScreen.screens[0].frame;
+    IM_ASSERT(firstScreenFrame.origin.x == 0 && firstScreenFrame.origin.y == 0);
+
+    for (NSScreen* screen in NSScreen.screens)
+    {
+        NSRect frame = screen.frame;
+        NSRect visibleFrame = screen.visibleFrame;
+        ConvertNSRect(&frame);
+        ConvertNSRect(&visibleFrame);
+
+        ImGuiPlatformMonitor imgui_monitor;
+        imgui_monitor.MainPos = ImVec2(frame.origin.x, frame.origin.y);
+        imgui_monitor.MainSize = ImVec2(frame.size.width, frame.size.height);
+        imgui_monitor.WorkPos = ImVec2(visibleFrame.origin.x, visibleFrame.origin.y);
+        imgui_monitor.WorkSize = ImVec2(visibleFrame.size.width, visibleFrame.size.height);
+        imgui_monitor.DpiScale = screen.backingScaleFactor;
+        imgui_monitor.PlatformHandle = (__bridge_retained void*)screen;
+
+        platform_io.Monitors.push_back(imgui_monitor);
+    }
+}
+
+static void ImGui_ImplOSX_InitMultiViewportSupport()
+{
+    ImGui_ImplOSX_Data* bd = ImGui_ImplOSX_GetBackendData();
+
+    // Register platform interface (will be coupled with a renderer interface)
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Platform_CreateWindow = ImGui_ImplOSX_CreateWindow;
+    platform_io.Platform_DestroyWindow = ImGui_ImplOSX_DestroyWindow;
+    platform_io.Platform_ShowWindow = ImGui_ImplOSX_ShowWindow;
+    platform_io.Platform_SetWindowPos = ImGui_ImplOSX_SetWindowPos;
+    platform_io.Platform_GetWindowPos = ImGui_ImplOSX_GetWindowPos;
+    platform_io.Platform_SetWindowSize = ImGui_ImplOSX_SetWindowSize;
+    platform_io.Platform_GetWindowSize = ImGui_ImplOSX_GetWindowSize;
+    platform_io.Platform_SetWindowFocus = ImGui_ImplOSX_SetWindowFocus;
+    platform_io.Platform_GetWindowFocus = ImGui_ImplOSX_GetWindowFocus;
+    platform_io.Platform_GetWindowMinimized = ImGui_ImplOSX_GetWindowMinimized;
+    platform_io.Platform_SetWindowTitle = ImGui_ImplOSX_SetWindowTitle;
+    platform_io.Platform_SetWindowAlpha = ImGui_ImplOSX_SetWindowAlpha;
+    platform_io.Platform_GetWindowDpiScale = ImGui_ImplOSX_GetWindowDpiScale; // FIXME-DPI
+
+    // Register main window handle (which is owned by the main application, not by us)
+    ImGuiViewport* main_viewport = ImGui::GetMainViewport();
+    ImGuiViewportDataOSX* data = IM_NEW(ImGuiViewportDataOSX)();
+    data->Window = bd->Window;
+    data->WindowOwned = false;
+    main_viewport->PlatformUserData = data;
+    main_viewport->PlatformHandle = (__bridge void*)bd->Window;
+
+    [NSNotificationCenter.defaultCenter addObserver:bd->Observer
+                                           selector:@selector(displaysDidChange:)
+                                               name:NSApplicationDidChangeScreenParametersNotification
+                                             object:nil];
+}
+
+static void ImGui_ImplOSX_ShutdownMultiViewportSupport()
+{
+    ImGui_ImplOSX_Data* bd = ImGui_ImplOSX_GetBackendData();
+    [NSNotificationCenter.defaultCenter removeObserver:bd->Observer
+                                                  name:NSApplicationDidChangeScreenParametersNotification
+                                                object:nil];
+    bd->Observer = nullptr;
+    bd->Window = nullptr;
+    if (bd->Monitor != nullptr)
+    {
+        [NSEvent removeMonitor:bd->Monitor];
+        bd->Monitor = nullptr;
+    }
+
+    ImGuiViewport* main_viewport = ImGui::GetMainViewport();
+    ImGuiViewportDataOSX* data = (ImGuiViewportDataOSX*)main_viewport->PlatformUserData;
+    IM_DELETE(data);
+    main_viewport->PlatformUserData = nullptr;
+    ImGui::DestroyPlatformWindows();
+}
+
 //-----------------------------------------------------------------------------
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_sdl2.cpp

@@ -7,9 +7,13 @@
 //  [X] Platform: Clipboard support.
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
 //  [X] Platform: Basic IME support. App needs to call 'SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");' before SDL_CreateWindow()!.
+//  [X] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
+// Missing features or Issues:
+//  [ ] Platform: Multi-viewport: Minimized windows seems to break mouse wheel events (at least under Windows).
+//  [ ] Platform: Multi-viewport: ParentViewportID not honored, and so io.ConfigViewportsNoDefaultParent has no effect (minor).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -21,22 +25,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-16: Made ImGui_ImplSDL2_GetContentScaleForWindow(), ImGui_ImplSDL2_GetContentScaleForDisplay() helpers return a minimum of 1.0f, as some Linux setup seems to report <1.0f value and this breaks scaling border size. (#9369)
-//  2026-02-13: Inputs: systems other than X11 are back to starting mouse capture on mouse down (reverts 2025-02-26 change). Only X11 requires waiting for a drag by default (not ideal, but a better default for X11 users). Added ImGui_ImplSDL2_SetMouseCaptureMode() for X11 debugger users. (#3650, #6410, #9235)
-//  2026-01-15: Changed GetClipboardText() handler to return nullptr on error aka clipboard contents is not text. Consistent with other backends. (#9168)
-//  2025-09-24: Skip using the SDL_GetGlobalMouseState() state when one of our window is hovered, as the SDL_MOUSEMOTION data is reliable. Fix macOS notch mouse coordinates issue in fullscreen mode + better perf on X11. (#7919, #7786)
-//  2025-09-18: Call platform_io.ClearPlatformHandlers() on shutdown.
-//  2025-09-15: Content Scales are always reported as 1.0 on Wayland. (#8921)
-//  2025-07-08: Made ImGui_ImplSDL2_GetContentScaleForWindow(), ImGui_ImplSDL2_GetContentScaleForDisplay() helpers return 1.0f on Emscripten and Android platforms, matching macOS logic. (#8742, #8733)
-//  2025-06-11: Added ImGui_ImplSDL2_GetContentScaleForWindow(SDL_Window* window) and ImGui_ImplSDL2_GetContentScaleForDisplay(int display_index) helper to facilitate making DPI-aware apps.
-//  2025-04-09: Don't attempt to call SDL_CaptureMouse() on drivers where we don't call SDL_GetGlobalMouseState(). (#8561)
-//  2025-03-21: Fill gamepad inputs and set ImGuiBackendFlags_HasGamepad regardless of ImGuiConfigFlags_NavEnableGamepad being set.
-//  2025-03-10: When dealing with OEM keys, use scancodes instead of translated keycodes to choose ImGuiKey values. (#7136, #7201, #7206, #7306, #7670, #7672, #8468)
-//  2025-02-26: Only start SDL_CaptureMouse() when mouse is being dragged, to mitigate issues with e.g. Linux debuggers not claiming capture back. (#6410, #3650)
-//  2025-02-24: Avoid calling SDL_GetGlobalMouseState() when mouse is in relative mode.
-//  2025-02-18: Added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress mouse cursor support.
-//  2025-02-10: Using SDL_OpenURL() in platform_io.Platform_OpenInShellFn handler.
-//  2025-01-20: Made ImGui_ImplSDL2_SetGamepadMode(ImGui_ImplSDL2_GamepadMode_Manual) accept an empty array.
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2024-10-24: Emscripten: from SDL 2.30.9, SDL_EVENT_MOUSE_WHEEL event doesn't require dividing by 100.0f.
 //  2024-09-09: use SDL_Vulkan_GetDrawableSize() when available. (#7967, #3190)
 //  2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
@@ -74,7 +63,7 @@
 //  2022-01-10: Inputs: calling new io.AddKeyEvent(), io.AddKeyModsEvent() + io.SetKeyEventNativeData() API (1.87+). Support for full ImGuiKey range.
 //  2021-08-17: Calling io.AddFocusEvent() on SDL_WINDOWEVENT_FOCUS_GAINED/SDL_WINDOWEVENT_FOCUS_LOST.
 //  2021-07-29: Inputs: MousePos is correctly reported when the host platform window is hovered but not focused (using SDL_GetMouseFocus() + SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, requires SDL 2.0.5+)
-//  2021-06-29: *BREAKING CHANGE* Removed 'SDL_Window* window' parameter to ImGui_ImplSDL2_NewFrame() which was unnecessary.
+//  2021-06:29: *BREAKING CHANGE* Removed 'SDL_Window* window' parameter to ImGui_ImplSDL2_NewFrame() which was unnecessary.
 //  2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
 //  2021-03-22: Rework global mouse pos availability check listing supported platforms explicitly, effectively fixing mouse access on Raspberry Pi. (#2837, #3950)
 //  2020-05-25: Misc: Report a zero display-size when window is minimized, to be consistent with other backends.
@@ -111,43 +100,48 @@
 // Clang warnings with -Weverything
 #if defined(__clang__)
 #pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wold-style-cast"                 // warning: use of old-style cast
 #pragma clang diagnostic ignored "-Wimplicit-int-float-conversion"  // warning: implicit conversion from 'xxx' to 'float' may lose precision
 #endif
 
 // SDL
+// (the multi-viewports feature requires SDL features supported from SDL 2.0.4+. SDL 2.0.5+ is highly recommended)
 #include <SDL.h>
 #include <SDL_syswm.h>
-#include <stdio.h>              // for snprintf()
 #ifdef __APPLE__
 #include <TargetConditionals.h>
 #endif
 #ifdef __EMSCRIPTEN__
 #include <emscripten/em_js.h>
 #endif
-#undef Status // X11 headers are leaking this.
 
 #if SDL_VERSION_ATLEAST(2,0,4) && !defined(__EMSCRIPTEN__) && !defined(__ANDROID__) && !(defined(__APPLE__) && TARGET_OS_IOS) && !defined(__amigaos4__)
 #define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE    1
 #else
 #define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE    0
 #endif
+#define SDL_HAS_WINDOW_ALPHA                SDL_VERSION_ATLEAST(2,0,5)
+#define SDL_HAS_ALWAYS_ON_TOP               SDL_VERSION_ATLEAST(2,0,5)
+#define SDL_HAS_USABLE_DISPLAY_BOUNDS       SDL_VERSION_ATLEAST(2,0,5)
 #define SDL_HAS_PER_MONITOR_DPI             SDL_VERSION_ATLEAST(2,0,4)
 #define SDL_HAS_VULKAN                      SDL_VERSION_ATLEAST(2,0,6)
-#define SDL_HAS_OPEN_URL                    SDL_VERSION_ATLEAST(2,0,14)
+#define SDL_HAS_DISPLAY_EVENT               SDL_VERSION_ATLEAST(2,0,9)
+#define SDL_HAS_SHOW_WINDOW_ACTIVATION_HINT SDL_VERSION_ATLEAST(2,0,18)
 #if SDL_HAS_VULKAN
 #include <SDL_vulkan.h>
+#else
+static const Uint32 SDL_WINDOW_VULKAN = 0x10000000;
 #endif
 
 // SDL Data
 struct ImGui_ImplSDL2_Data
 {
     SDL_Window*             Window;
-    Uint32                  WindowID;       // Stored in ImGuiViewport::PlatformHandle. Use SDL_GetWindowFromID() to get SDL_Window* from Uint32 WindowID.
+    Uint32                  WindowID;
     SDL_Renderer*           Renderer;
     Uint64                  Time;
     char*                   ClipboardTextData;
-    char                    BackendPlatformName[48];
+    bool                    UseVulkan;
+    bool                    WantUpdateMonitors;
 
     // Mouse handling
     Uint32                  MouseWindowID;
@@ -156,7 +150,7 @@ struct ImGui_ImplSDL2_Data
     SDL_Cursor*             MouseLastCursor;
     int                     MouseLastLeaveFrame;
     bool                    MouseCanUseGlobalState;
-    ImGui_ImplSDL2_MouseCaptureMode MouseCaptureMode;
+    bool                    MouseCanReportHoveredViewport;  // This is hard to use/unreliable on SDL so we'll set ImGuiBackendFlags_HasMouseHoveredViewport dynamically based on state.
 
     // Gamepad handling
     ImVector<SDL_GameController*> Gamepads;
@@ -175,16 +169,18 @@ static ImGui_ImplSDL2_Data* ImGui_ImplSDL2_GetBackendData()
     return ImGui::GetCurrentContext() ? (ImGui_ImplSDL2_Data*)ImGui::GetIO().BackendPlatformUserData : nullptr;
 }
 
+// Forward Declarations
+static void ImGui_ImplSDL2_UpdateMonitors();
+static void ImGui_ImplSDL2_InitMultiViewportSupport(SDL_Window* window, void* sdl_gl_context);
+static void ImGui_ImplSDL2_ShutdownMultiViewportSupport();
+
 // Functions
 static const char* ImGui_ImplSDL2_GetClipboardText(ImGuiContext*)
 {
     ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
     if (bd->ClipboardTextData)
         SDL_free(bd->ClipboardTextData);
-    if (SDL_HasClipboardText())
-        bd->ClipboardTextData = SDL_GetClipboardText();
-    else
-        bd->ClipboardTextData = nullptr;
+    bd->ClipboardTextData = SDL_GetClipboardText();
     return bd->ClipboardTextData;
 }
 
@@ -194,13 +190,13 @@ static void ImGui_ImplSDL2_SetClipboardText(ImGuiContext*, const char* text)
 }
 
 // Note: native IME will only display if user calls SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1") _before_ SDL_CreateWindow().
-static void ImGui_ImplSDL2_PlatformSetImeData(ImGuiContext*, ImGuiViewport*, ImGuiPlatformImeData* data)
+static void ImGui_ImplSDL2_PlatformSetImeData(ImGuiContext*, ImGuiViewport* viewport, ImGuiPlatformImeData* data)
 {
     if (data->WantVisible)
     {
         SDL_Rect r;
-        r.x = (int)data->InputPos.x;
-        r.y = (int)data->InputPos.y;
+        r.x = (int)(data->InputPos.x - viewport->Pos.x);
+        r.y = (int)(data->InputPos.y - viewport->Pos.y + data->InputLineHeight);
         r.w = 1;
         r.h = (int)data->InputLineHeight;
         SDL_SetTextInputRect(&r);
@@ -211,6 +207,7 @@ static void ImGui_ImplSDL2_PlatformSetImeData(ImGuiContext*, ImGuiViewport*, ImG
 ImGuiKey ImGui_ImplSDL2_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode scancode);
 ImGuiKey ImGui_ImplSDL2_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode scancode)
 {
+    IM_UNUSED(scancode);
     switch (keycode)
     {
         case SDLK_TAB: return ImGuiKey_Tab;
@@ -228,17 +225,17 @@ ImGuiKey ImGui_ImplSDL2_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode sca
         case SDLK_SPACE: return ImGuiKey_Space;
         case SDLK_RETURN: return ImGuiKey_Enter;
         case SDLK_ESCAPE: return ImGuiKey_Escape;
-        //case SDLK_QUOTE: return ImGuiKey_Apostrophe;
+        case SDLK_QUOTE: return ImGuiKey_Apostrophe;
         case SDLK_COMMA: return ImGuiKey_Comma;
-        //case SDLK_MINUS: return ImGuiKey_Minus;
+        case SDLK_MINUS: return ImGuiKey_Minus;
         case SDLK_PERIOD: return ImGuiKey_Period;
-        //case SDLK_SLASH: return ImGuiKey_Slash;
+        case SDLK_SLASH: return ImGuiKey_Slash;
         case SDLK_SEMICOLON: return ImGuiKey_Semicolon;
-        //case SDLK_EQUALS: return ImGuiKey_Equal;
-        //case SDLK_LEFTBRACKET: return ImGuiKey_LeftBracket;
-        //case SDLK_BACKSLASH: return ImGuiKey_Backslash;
-        //case SDLK_RIGHTBRACKET: return ImGuiKey_RightBracket;
-        //case SDLK_BACKQUOTE: return ImGuiKey_GraveAccent;
+        case SDLK_EQUALS: return ImGuiKey_Equal;
+        case SDLK_LEFTBRACKET: return ImGuiKey_LeftBracket;
+        case SDLK_BACKSLASH: return ImGuiKey_Backslash;
+        case SDLK_RIGHTBRACKET: return ImGuiKey_RightBracket;
+        case SDLK_BACKQUOTE: return ImGuiKey_GraveAccent;
         case SDLK_CAPSLOCK: return ImGuiKey_CapsLock;
         case SDLK_SCROLLLOCK: return ImGuiKey_ScrollLock;
         case SDLK_NUMLOCKCLEAR: return ImGuiKey_NumLock;
@@ -334,24 +331,6 @@ ImGuiKey ImGui_ImplSDL2_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode sca
         case SDLK_AC_FORWARD: return ImGuiKey_AppForward;
         default: break;
     }
-
-    // Fallback to scancode
-    switch (scancode)
-    {
-    case SDL_SCANCODE_GRAVE: return ImGuiKey_GraveAccent;
-    case SDL_SCANCODE_MINUS: return ImGuiKey_Minus;
-    case SDL_SCANCODE_EQUALS: return ImGuiKey_Equal;
-    case SDL_SCANCODE_LEFTBRACKET: return ImGuiKey_LeftBracket;
-    case SDL_SCANCODE_RIGHTBRACKET: return ImGuiKey_RightBracket;
-    case SDL_SCANCODE_NONUSBACKSLASH: return ImGuiKey_Oem102;
-    case SDL_SCANCODE_BACKSLASH: return ImGuiKey_Backslash;
-    case SDL_SCANCODE_SEMICOLON: return ImGuiKey_Semicolon;
-    case SDL_SCANCODE_APOSTROPHE: return ImGuiKey_Apostrophe;
-    case SDL_SCANCODE_COMMA: return ImGuiKey_Comma;
-    case SDL_SCANCODE_PERIOD: return ImGuiKey_Period;
-    case SDL_SCANCODE_SLASH: return ImGuiKey_Slash;
-    default: break;
-    }
     return ImGuiKey_None;
 }
 
@@ -366,8 +345,7 @@ static void ImGui_ImplSDL2_UpdateKeyModifiers(SDL_Keymod sdl_key_mods)
 
 static ImGuiViewport* ImGui_ImplSDL2_GetViewportForWindowID(Uint32 window_id)
 {
-    ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
-    return (window_id == bd->WindowID) ? ImGui::GetMainViewport() : nullptr;
+    return ImGui::FindViewportByPlatformHandle((void*)(intptr_t)window_id);
 }
 
 // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
@@ -387,6 +365,13 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
             if (ImGui_ImplSDL2_GetViewportForWindowID(event->motion.windowID) == nullptr)
                 return false;
             ImVec2 mouse_pos((float)event->motion.x, (float)event->motion.y);
+            if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+            {
+                int window_x, window_y;
+                SDL_GetWindowPosition(SDL_GetWindowFromID(event->motion.windowID), &window_x, &window_y);
+                mouse_pos.x += window_x;
+                mouse_pos.y += window_y;
+            }
             io.AddMouseSourceEvent(event->motion.which == SDL_TOUCH_MOUSEID ? ImGuiMouseSource_TouchScreen : ImGuiMouseSource_Mouse);
             io.AddMousePosEvent(mouse_pos.x, mouse_pos.y);
             return true;
@@ -445,13 +430,24 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
             //    (event->type == SDL_KEYDOWN) ? "DOWN" : "UP  ", event->key.keysym.sym, SDL_GetKeyName(event->key.keysym.sym), event->key.keysym.scancode, SDL_GetScancodeName(event->key.keysym.scancode), event->key.keysym.mod);
             ImGuiKey key = ImGui_ImplSDL2_KeyEventToImGuiKey(event->key.keysym.sym, event->key.keysym.scancode);
             io.AddKeyEvent(key, (event->type == SDL_KEYDOWN));
-            io.SetKeyEventNativeData(key, (int)event->key.keysym.sym, (int)event->key.keysym.scancode, (int)event->key.keysym.scancode); // To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions.
+            io.SetKeyEventNativeData(key, event->key.keysym.sym, event->key.keysym.scancode, event->key.keysym.scancode); // To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions.
             return true;
         }
+#if SDL_HAS_DISPLAY_EVENT
+        case SDL_DISPLAYEVENT:
+        {
+            // 2.0.26 has SDL_DISPLAYEVENT_CONNECTED/SDL_DISPLAYEVENT_DISCONNECTED/SDL_DISPLAYEVENT_ORIENTATION,
+            // so change of DPI/Scaling are not reflected in this event. (SDL3 has it)
+            bd->WantUpdateMonitors = true;
+            return true;
+        }
+#endif
         case SDL_WINDOWEVENT:
         {
-            if (ImGui_ImplSDL2_GetViewportForWindowID(event->window.windowID) == nullptr)
+            ImGuiViewport* viewport = ImGui_ImplSDL2_GetViewportForWindowID(event->window.windowID);
+            if (viewport == NULL)
                 return false;
+
             // - When capturing mouse, SDL will send a bunch of conflicting LEAVE/ENTER event on every mouse move, but the final ENTER tends to be right.
             // - However we won't get a correct LEAVE event for a captured window.
             // - In some cases, when detaching a window from main viewport SDL may send SDL_WINDOWEVENT_ENTER one frame too late,
@@ -467,8 +463,14 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
                 bd->MouseLastLeaveFrame = ImGui::GetFrameCount() + 1;
             if (window_event == SDL_WINDOWEVENT_FOCUS_GAINED)
                 io.AddFocusEvent(true);
-            if (window_event == SDL_WINDOWEVENT_FOCUS_LOST)
+            else if (window_event == SDL_WINDOWEVENT_FOCUS_LOST)
                 io.AddFocusEvent(false);
+            else if (window_event == SDL_WINDOWEVENT_CLOSE)
+                viewport->PlatformRequestClose = true;
+            else if (window_event == SDL_WINDOWEVENT_MOVED)
+                viewport->PlatformRequestMove = true;
+            else if (window_event == SDL_WINDOWEVENT_RESIZED)
+                viewport->PlatformRequestResize = true;
             return true;
         }
         case SDL_CONTROLLERDEVICEADDED:
@@ -477,8 +479,6 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
             bd->WantUpdateGamepadsList = true;
             return true;
         }
-        default:
-            break;
     }
     return false;
 }
@@ -492,40 +492,38 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window, SDL_Renderer* renderer, void
     ImGuiIO& io = ImGui::GetIO();
     IMGUI_CHECKVERSION();
     IM_ASSERT(io.BackendPlatformUserData == nullptr && "Already initialized a platform backend!");
-    //SDL_SetHint(SDL_HINT_EVENT_LOGGING, "2");
 
-    // Obtain compiled and runtime versions
-    SDL_version ver_compiled;
-    SDL_version ver_runtime;
-    SDL_VERSION(&ver_compiled);
-    SDL_GetVersion(&ver_runtime);
+    // Check and store if we are on a SDL backend that supports global mouse position
+    // ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
+    bool mouse_can_use_global_state = false;
+#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
+    const char* sdl_backend = SDL_GetCurrentVideoDriver();
+    const char* global_mouse_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
+    for (int n = 0; n < IM_ARRAYSIZE(global_mouse_whitelist); n++)
+        if (strncmp(sdl_backend, global_mouse_whitelist[n], strlen(global_mouse_whitelist[n])) == 0)
+            mouse_can_use_global_state = true;
+#endif
 
     // Setup backend capabilities flags
     ImGui_ImplSDL2_Data* bd = IM_NEW(ImGui_ImplSDL2_Data)();
-    snprintf(bd->BackendPlatformName, sizeof(bd->BackendPlatformName), "imgui_impl_sdl2 (%u.%u.%u, %u.%u.%u)",
-        ver_compiled.major, ver_compiled.minor, ver_compiled.patch, ver_runtime.major, ver_runtime.minor, ver_runtime.patch);
     io.BackendPlatformUserData = (void*)bd;
-    io.BackendPlatformName = bd->BackendPlatformName;
+    io.BackendPlatformName = "imgui_impl_sdl2";
     io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;           // We can honor GetMouseCursor() values (optional)
     io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos;            // We can honor io.WantSetMousePos requests (optional, rarely used)
+    if (mouse_can_use_global_state)
+        io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports;  // We can create multi-viewports on the Platform side (optional)
 
     bd->Window = window;
     bd->WindowID = SDL_GetWindowID(window);
     bd->Renderer = renderer;
 
-    // Check and store if we are on a SDL backend that supports SDL_GetGlobalMouseState() and SDL_CaptureMouse()
-    // ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
-    bd->MouseCanUseGlobalState = false;
-    bd->MouseCaptureMode = ImGui_ImplSDL2_MouseCaptureMode_Disabled;
-#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
-    const char* sdl_backend = SDL_GetCurrentVideoDriver();
-    const char* capture_and_global_state_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
-    for (const char* item : capture_and_global_state_whitelist)
-        if (strncmp(sdl_backend, item, strlen(item)) == 0)
-        {
-            bd->MouseCanUseGlobalState = true;
-            bd->MouseCaptureMode = (strcmp(item, "x11") == 0) ? ImGui_ImplSDL2_MouseCaptureMode_EnabledAfterDrag : ImGui_ImplSDL2_MouseCaptureMode_Enabled;
-        }
+    // SDL on Linux/OSX doesn't report events for unfocused windows (see https://github.com/ocornut/imgui/issues/4960)
+    // We will use 'MouseCanReportHoveredViewport' to set 'ImGuiBackendFlags_HasMouseHoveredViewport' dynamically each frame.
+    bd->MouseCanUseGlobalState = mouse_can_use_global_state;
+#ifndef __APPLE__
+    bd->MouseCanReportHoveredViewport = bd->MouseCanUseGlobalState;
+#else
+    bd->MouseCanReportHoveredViewport = false;
 #endif
 
     ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
@@ -535,10 +533,11 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window, SDL_Renderer* renderer, void
     platform_io.Platform_SetImeDataFn = ImGui_ImplSDL2_PlatformSetImeData;
 #ifdef __EMSCRIPTEN__
     platform_io.Platform_OpenInShellFn = [](ImGuiContext*, const char* url) { ImGui_ImplSDL2_EmscriptenOpenURL(url); return true; };
-#elif SDL_HAS_OPEN_URL
-    platform_io.Platform_OpenInShellFn = [](ImGuiContext*, const char* url) { return SDL_OpenURL(url) == 0; };
 #endif
 
+    // Update monitor a first time during init
+    ImGui_ImplSDL2_UpdateMonitors();
+
     // Gamepad handling
     bd->GamepadMode = ImGui_ImplSDL2_GamepadMode_AutoFirst;
     bd->WantUpdateGamepadsList = true;
@@ -552,8 +551,6 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window, SDL_Renderer* renderer, void
     bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENESW);
     bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
     bd->MouseCursors[ImGuiMouseCursor_Hand] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_HAND);
-    bd->MouseCursors[ImGuiMouseCursor_Wait] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_WAIT);
-    bd->MouseCursors[ImGuiMouseCursor_Progress] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_WAITARROW);
     bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NO);
 
     // Set platform dependent data in viewport
@@ -593,7 +590,11 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window, SDL_Renderer* renderer, void
     SDL_SetHint(SDL_HINT_MOUSE_AUTO_CAPTURE, "0");
 #endif
 
-    (void)sdl_gl_context; // Unused in 'master' branch.
+    // We need SDL_CaptureMouse(), SDL_GetGlobalMouseState() from SDL 2.0.4+ to support multiple viewports.
+    // We left the call to ImGui_ImplSDL2_InitMultiViewportSupport() outside of #ifdef to avoid unused-function warnings.
+    if (io.BackendFlags & ImGuiBackendFlags_PlatformHasViewports)
+        ImGui_ImplSDL2_InitMultiViewportSupport(window, sdl_gl_context);
+
     return true;
 }
 
@@ -607,7 +608,11 @@ bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window)
 #if !SDL_HAS_VULKAN
     IM_ASSERT(0 && "Unsupported");
 #endif
-    return ImGui_ImplSDL2_Init(window, nullptr, nullptr);
+    if (!ImGui_ImplSDL2_Init(window, nullptr, nullptr))
+        return false;
+    ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
+    bd->UseVulkan = true;
+    return true;
 }
 
 bool ImGui_ImplSDL2_InitForD3D(SDL_Window* window)
@@ -640,7 +645,8 @@ void ImGui_ImplSDL2_Shutdown()
     ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
     IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+
+    ImGui_ImplSDL2_ShutdownMultiViewportSupport();
 
     if (bd->ClipboardTextData)
         SDL_free(bd->ClipboardTextData);
@@ -650,19 +656,11 @@ void ImGui_ImplSDL2_Shutdown()
 
     io.BackendPlatformName = nullptr;
     io.BackendPlatformUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos | ImGuiBackendFlags_HasGamepad);
-    platform_io.ClearPlatformHandlers();
+    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos | ImGuiBackendFlags_HasGamepad | ImGuiBackendFlags_PlatformHasViewports | ImGuiBackendFlags_HasMouseHoveredViewport);
     IM_DELETE(bd);
 }
 
-void ImGui_ImplSDL2_SetMouseCaptureMode(ImGui_ImplSDL2_MouseCaptureMode mode)
-{
-    ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
-    if (mode == ImGui_ImplSDL2_MouseCaptureMode_Disabled && bd->MouseCaptureMode != ImGui_ImplSDL2_MouseCaptureMode_Disabled)
-        SDL_CaptureMouse(SDL_FALSE);
-    bd->MouseCaptureMode = mode;
-}
-
+// This code is incredibly messy because some of the functions we need for full viewport support are not available in SDL < 2.0.4.
 static void ImGui_ImplSDL2_UpdateMouseData()
 {
     ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
@@ -670,49 +668,59 @@ static void ImGui_ImplSDL2_UpdateMouseData()
 
     // We forward mouse input when hovered or captured (via SDL_MOUSEMOTION) or when focused (below)
 #if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
-    // - SDL_CaptureMouse() let the OS know e.g. that our drags can extend outside of parent boundaries (we want updated position) and shouldn't trigger other operations outside.
-    // - Debuggers under Linux tends to leave captured mouse on break, which may be very inconvenient, so to mitigate the issue on X11 we we wait until mouse has moved to begin capture.
-    if (bd->MouseCaptureMode == ImGui_ImplSDL2_MouseCaptureMode_Enabled)
-    {
-        SDL_CaptureMouse((bd->MouseButtonsDown != 0) ? SDL_TRUE : SDL_FALSE);
-    }
-    else if (bd->MouseCaptureMode == ImGui_ImplSDL2_MouseCaptureMode_EnabledAfterDrag)
-    {
-        bool want_capture = false;
-        for (int button_n = 0; button_n < ImGuiMouseButton_COUNT && !want_capture; button_n++)
-            if (ImGui::IsMouseDragging(button_n, 1.0f))
-                want_capture = true;
-        SDL_CaptureMouse(want_capture ? SDL_TRUE : SDL_FALSE);
-    }
-
+    // SDL_CaptureMouse() let the OS know e.g. that our imgui drag outside the SDL window boundaries shouldn't e.g. trigger other operations outside
+    SDL_CaptureMouse((bd->MouseButtonsDown != 0) ? SDL_TRUE : SDL_FALSE);
     SDL_Window* focused_window = SDL_GetKeyboardFocus();
-    const bool is_app_focused = (bd->Window == focused_window);
+    const bool is_app_focused = (focused_window && (bd->Window == focused_window || ImGui_ImplSDL2_GetViewportForWindowID(SDL_GetWindowID(focused_window)) != NULL));
 #else
     SDL_Window* focused_window = bd->Window;
     const bool is_app_focused = (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_INPUT_FOCUS) != 0; // SDL 2.0.3 and non-windowed systems: single-viewport only
 #endif
+
     if (is_app_focused)
     {
         // (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when io.ConfigNavMoveSetMousePos is enabled by user)
         if (io.WantSetMousePos)
-            SDL_WarpMouseInWindow(bd->Window, (int)io.MousePos.x, (int)io.MousePos.y);
+        {
+#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
+            if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+                SDL_WarpMouseGlobal((int)io.MousePos.x, (int)io.MousePos.y);
+            else
+#endif
+                SDL_WarpMouseInWindow(bd->Window, (int)io.MousePos.x, (int)io.MousePos.y);
+        }
 
-        // (Optional) Fallback to provide unclamped mouse position when focused but not hovered (SDL_MOUSEMOTION already provides this when hovered or captured)
-        // Note that SDL_GetGlobalMouseState() is in theory slow on X11, but this only runs on rather specific cases. If a problem we may provide a way to opt-out this feature.
-        SDL_Window* hovered_window = SDL_GetMouseFocus();
-        const bool is_relative_mouse_mode = SDL_GetRelativeMouseMode() != 0;
-        if (hovered_window == nullptr && bd->MouseCanUseGlobalState && bd->MouseButtonsDown == 0 && !is_relative_mouse_mode)
+        // (Optional) Fallback to provide mouse position when focused (SDL_MOUSEMOTION already provides this when hovered or captured)
+        if (bd->MouseCanUseGlobalState && bd->MouseButtonsDown == 0)
         {
             // Single-viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window)
-            int mouse_x, mouse_y;
-            int window_x, window_y;
+            // Multi-viewport mode: mouse position in OS absolute coordinates (io.MousePos is (0,0) when the mouse is on the upper-left of the primary monitor)
+            int mouse_x, mouse_y, window_x, window_y;
             SDL_GetGlobalMouseState(&mouse_x, &mouse_y);
-            SDL_GetWindowPosition(focused_window, &window_x, &window_y);
-            mouse_x -= window_x;
-            mouse_y -= window_y;
+            if (!(io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable))
+            {
+                SDL_GetWindowPosition(focused_window, &window_x, &window_y);
+                mouse_x -= window_x;
+                mouse_y -= window_y;
+            }
             io.AddMousePosEvent((float)mouse_x, (float)mouse_y);
         }
     }
+
+    // (Optional) When using multiple viewports: call io.AddMouseViewportEvent() with the viewport the OS mouse cursor is hovering.
+    // If ImGuiBackendFlags_HasMouseHoveredViewport is not set by the backend, Dear imGui will ignore this field and infer the information using its flawed heuristic.
+    // - [!] SDL backend does NOT correctly ignore viewports with the _NoInputs flag.
+    //       Some backend are not able to handle that correctly. If a backend report an hovered viewport that has the _NoInputs flag (e.g. when dragging a window
+    //       for docking, the viewport has the _NoInputs flag in order to allow us to find the viewport under), then Dear ImGui is forced to ignore the value reported
+    //       by the backend, and use its flawed heuristic to guess the viewport behind.
+    // - [X] SDL backend correctly reports this regardless of another viewport behind focused and dragged from (we need this to find a useful drag and drop target).
+    if (io.BackendFlags & ImGuiBackendFlags_HasMouseHoveredViewport)
+    {
+        ImGuiID mouse_viewport_id = 0;
+        if (ImGuiViewport* mouse_viewport = ImGui_ImplSDL2_GetViewportForWindowID(bd->MouseWindowID))
+            mouse_viewport_id = mouse_viewport->ID;
+        io.AddMouseViewportEvent(mouse_viewport_id);
+    }
 }
 
 static void ImGui_ImplSDL2_UpdateMouseCursor()
@@ -741,35 +749,6 @@ static void ImGui_ImplSDL2_UpdateMouseCursor()
     }
 }
 
-// - On Windows the process needs to be marked DPI-aware!! SDL2 doesn't do it by default. You can call ::SetProcessDPIAware() or call ImGui_ImplWin32_EnableDpiAwareness() from Win32 backend.
-// - Apple platforms use FramebufferScale so we always return 1.0f.
-// - Some accessibility applications are declaring virtual monitors with a DPI of 0.0f, see #7902. We preserve this value for caller to handle.
-float ImGui_ImplSDL2_GetContentScaleForWindow(SDL_Window* window)
-{
-    return ImGui_ImplSDL2_GetContentScaleForDisplay(SDL_GetWindowDisplayIndex(window));
-}
-
-// SDL_GetDisplayDPI() seems rather unreliable on Linux.
-float ImGui_ImplSDL2_GetContentScaleForDisplay(int display_index)
-{
-    const char* sdl_driver = SDL_GetCurrentVideoDriver();
-    if (sdl_driver && strcmp(sdl_driver, "wayland") == 0)
-        return 1.0f;
-#if SDL_HAS_PER_MONITOR_DPI
-#if !defined(__APPLE__) && !defined(__EMSCRIPTEN__) && !defined(__ANDROID__)
-    float dpi = 0.0f;
-    if (SDL_GetDisplayDPI(display_index, &dpi, nullptr, nullptr) == 0)
-    {
-        if (dpi < 96.0f)
-            dpi = 96.0f;
-        return dpi / 96.0f;
-    }
-#endif
-#endif
-    IM_UNUSED(display_index);
-    return 1.0f;
-}
-
 static void ImGui_ImplSDL2_CloseGamepads()
 {
     ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
@@ -785,7 +764,7 @@ void ImGui_ImplSDL2_SetGamepadMode(ImGui_ImplSDL2_GamepadMode mode, struct _SDL_
     ImGui_ImplSDL2_CloseGamepads();
     if (mode == ImGui_ImplSDL2_GamepadMode_Manual)
     {
-        IM_ASSERT(manual_gamepads_array != nullptr || manual_gamepads_count <= 0);
+        IM_ASSERT(manual_gamepads_array != nullptr && manual_gamepads_count > 0);
         for (int n = 0; n < manual_gamepads_count; n++)
             bd->Gamepads.push_back(manual_gamepads_array[n]);
     }
@@ -839,6 +818,9 @@ static void ImGui_ImplSDL2_UpdateGamepads()
         bd->WantUpdateGamepadsList = false;
     }
 
+    // FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
+    if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
+        return;
     io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
     if (bd->Gamepads.Size == 0)
         return;
@@ -872,25 +854,41 @@ static void ImGui_ImplSDL2_UpdateGamepads()
     ImGui_ImplSDL2_UpdateGamepadAnalog(bd, io, ImGuiKey_GamepadRStickDown,  SDL_CONTROLLER_AXIS_RIGHTY, +thumb_dead_zone, +32767);
 }
 
-static void ImGui_ImplSDL2_GetWindowSizeAndFramebufferScale(SDL_Window* window, SDL_Renderer* renderer, ImVec2* out_size, ImVec2* out_framebuffer_scale)
+// FIXME: Note that doesn't update with DPI/Scaling change only as SDL2 doesn't have an event for it (SDL3 has).
+static void ImGui_ImplSDL2_UpdateMonitors()
 {
-    int w, h;
-    int display_w, display_h;
-    SDL_GetWindowSize(window, &w, &h);
-    if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)
-        w = h = 0;
-    if (renderer != nullptr)
-        SDL_GetRendererOutputSize(renderer, &display_w, &display_h);
-#if SDL_HAS_VULKAN
-    else if (SDL_GetWindowFlags(window) & SDL_WINDOW_VULKAN)
-        SDL_Vulkan_GetDrawableSize(window, &display_w, &display_h);
+    ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Monitors.resize(0);
+    bd->WantUpdateMonitors = false;
+    int display_count = SDL_GetNumVideoDisplays();
+    for (int n = 0; n < display_count; n++)
+    {
+        // Warning: the validity of monitor DPI information on Windows depends on the application DPI awareness settings, which generally needs to be set in the manifest or at runtime.
+        ImGuiPlatformMonitor monitor;
+        SDL_Rect r;
+        SDL_GetDisplayBounds(n, &r);
+        monitor.MainPos = monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
+        monitor.MainSize = monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
+#if SDL_HAS_USABLE_DISPLAY_BOUNDS
+        SDL_GetDisplayUsableBounds(n, &r);
+        monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
+        monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
 #endif
-    else
-        SDL_GL_GetDrawableSize(window, &display_w, &display_h);
-    if (out_size != nullptr)
-        *out_size = ImVec2((float)w, (float)h);
-    if (out_framebuffer_scale != nullptr)
-        *out_framebuffer_scale = (w > 0 && h > 0) ? ImVec2((float)display_w / (float)w, (float)display_h / (float)h) : ImVec2(1.0f, 1.0f);
+#if SDL_HAS_PER_MONITOR_DPI
+        // FIXME-VIEWPORT: On MacOS SDL reports actual monitor DPI scale, ignoring OS configuration. We may want to set
+        //  DpiScale to cocoa_window.backingScaleFactor here.
+        float dpi = 0.0f;
+        if (!SDL_GetDisplayDPI(n, &dpi, nullptr, nullptr))
+        {
+            if (dpi <= 0.0f)
+                continue; // Some accessibility applications are declaring virtual monitors with a DPI of 0, see #7902.
+            monitor.DpiScale = dpi / 96.0f;
+        }
+#endif
+        monitor.PlatformHandle = (void*)(intptr_t)n;
+        platform_io.Monitors.push_back(monitor);
+    }
 }
 
 void ImGui_ImplSDL2_NewFrame()
@@ -899,8 +897,27 @@ void ImGui_ImplSDL2_NewFrame()
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplSDL2_Init()?");
     ImGuiIO& io = ImGui::GetIO();
 
-    // Setup main viewport size (every frame to accommodate for window resizing)
-    ImGui_ImplSDL2_GetWindowSizeAndFramebufferScale(bd->Window, bd->Renderer, &io.DisplaySize, &io.DisplayFramebufferScale);
+    // Setup display size (every frame to accommodate for window resizing)
+    int w, h;
+    int display_w, display_h;
+    SDL_GetWindowSize(bd->Window, &w, &h);
+    if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED)
+        w = h = 0;
+    if (bd->Renderer != nullptr)
+        SDL_GetRendererOutputSize(bd->Renderer, &display_w, &display_h);
+#if SDL_HAS_VULKAN
+    else if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_VULKAN)
+        SDL_Vulkan_GetDrawableSize(bd->Window, &display_w, &display_h);
+#endif
+    else
+        SDL_GL_GetDrawableSize(bd->Window, &display_w, &display_h);
+    io.DisplaySize = ImVec2((float)w, (float)h);
+    if (w > 0 && h > 0)
+        io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
+
+    // Update monitors
+    if (bd->WantUpdateMonitors)
+        ImGui_ImplSDL2_UpdateMonitors();
 
     // Setup time step (we don't use SDL_GetTicks() because it is using millisecond resolution)
     // (Accept SDL_GetPerformanceCounter() not returning a monotonically increasing value. Happens in VMs and Emscripten, see #6189, #6114, #3644)
@@ -908,7 +925,7 @@ void ImGui_ImplSDL2_NewFrame()
     Uint64 current_time = SDL_GetPerformanceCounter();
     if (current_time <= bd->Time)
         current_time = bd->Time + 1;
-    io.DeltaTime = bd->Time > 0 ? (float)((double)(current_time - bd->Time) / (double)frequency) : (float)(1.0f / 60.0f);
+    io.DeltaTime = bd->Time > 0 ? (float)((double)(current_time - bd->Time) / frequency) : (float)(1.0f / 60.0f);
     bd->Time = current_time;
 
     if (bd->MouseLastLeaveFrame && bd->MouseLastLeaveFrame >= ImGui::GetFrameCount() && bd->MouseButtonsDown == 0)
@@ -918,6 +935,13 @@ void ImGui_ImplSDL2_NewFrame()
         io.AddMousePosEvent(-FLT_MAX, -FLT_MAX);
     }
 
+    // Our io.AddMouseViewportEvent() calls will only be valid when not capturing.
+    // Technically speaking testing for 'bd->MouseButtonsDown == 0' would be more rigorous, but testing for payload reduces noise and potential side-effects.
+    if (bd->MouseCanReportHoveredViewport && ImGui::GetDragDropPayload() == nullptr)
+        io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport;
+    else
+        io.BackendFlags &= ~ImGuiBackendFlags_HasMouseHoveredViewport;
+
     ImGui_ImplSDL2_UpdateMouseData();
     ImGui_ImplSDL2_UpdateMouseCursor();
 
@@ -925,6 +949,256 @@ void ImGui_ImplSDL2_NewFrame()
     ImGui_ImplSDL2_UpdateGamepads();
 }
 
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+// Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
+struct ImGui_ImplSDL2_ViewportData
+{
+    SDL_Window*     Window;
+    Uint32          WindowID;
+    bool            WindowOwned;
+    SDL_GLContext   GLContext;
+
+    ImGui_ImplSDL2_ViewportData() { Window = nullptr; WindowID = 0; WindowOwned = false; GLContext = nullptr; }
+    ~ImGui_ImplSDL2_ViewportData() { IM_ASSERT(Window == nullptr && GLContext == nullptr); }
+};
+
+static void ImGui_ImplSDL2_CreateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
+    ImGui_ImplSDL2_ViewportData* vd = IM_NEW(ImGui_ImplSDL2_ViewportData)();
+    viewport->PlatformUserData = vd;
+
+    ImGuiViewport* main_viewport = ImGui::GetMainViewport();
+    ImGui_ImplSDL2_ViewportData* main_viewport_data = (ImGui_ImplSDL2_ViewportData*)main_viewport->PlatformUserData;
+
+    // Share GL resources with main context
+    bool use_opengl = (main_viewport_data->GLContext != nullptr);
+    SDL_GLContext backup_context = nullptr;
+    if (use_opengl)
+    {
+        backup_context = SDL_GL_GetCurrentContext();
+        SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
+        SDL_GL_MakeCurrent(main_viewport_data->Window, main_viewport_data->GLContext);
+    }
+
+    Uint32 sdl_flags = 0;
+    sdl_flags |= use_opengl ? SDL_WINDOW_OPENGL : (bd->UseVulkan ? SDL_WINDOW_VULKAN : 0);
+    sdl_flags |= SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_ALLOW_HIGHDPI;
+    sdl_flags |= SDL_WINDOW_HIDDEN;
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoDecoration) ? SDL_WINDOW_BORDERLESS : 0;
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoDecoration) ? 0 : SDL_WINDOW_RESIZABLE;
+#if !defined(_WIN32)
+    // See SDL hack in ImGui_ImplSDL2_ShowWindow().
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoTaskBarIcon) ? SDL_WINDOW_SKIP_TASKBAR : 0;
+#endif
+#if SDL_HAS_ALWAYS_ON_TOP
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_TopMost) ? SDL_WINDOW_ALWAYS_ON_TOP : 0;
+#endif
+    vd->Window = SDL_CreateWindow("No Title Yet", (int)viewport->Pos.x, (int)viewport->Pos.y, (int)viewport->Size.x, (int)viewport->Size.y, sdl_flags);
+    vd->WindowOwned = true;
+    if (use_opengl)
+    {
+        vd->GLContext = SDL_GL_CreateContext(vd->Window);
+        SDL_GL_SetSwapInterval(0);
+    }
+    if (use_opengl && backup_context)
+        SDL_GL_MakeCurrent(vd->Window, backup_context);
+
+    viewport->PlatformHandle = (void*)(intptr_t)SDL_GetWindowID(vd->Window);
+    viewport->PlatformHandleRaw = nullptr;
+    SDL_SysWMinfo info;
+    SDL_VERSION(&info.version);
+    if (SDL_GetWindowWMInfo(vd->Window, &info))
+    {
+#if defined(SDL_VIDEO_DRIVER_WINDOWS)
+        viewport->PlatformHandleRaw = info.info.win.window;
+#elif defined(__APPLE__) && defined(SDL_VIDEO_DRIVER_COCOA)
+        viewport->PlatformHandleRaw = (void*)info.info.cocoa.window;
+#endif
+    }
+}
+
+static void ImGui_ImplSDL2_DestroyWindow(ImGuiViewport* viewport)
+{
+    if (ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData)
+    {
+        if (vd->GLContext && vd->WindowOwned)
+            SDL_GL_DeleteContext(vd->GLContext);
+        if (vd->Window && vd->WindowOwned)
+            SDL_DestroyWindow(vd->Window);
+        vd->GLContext = nullptr;
+        vd->Window = nullptr;
+        IM_DELETE(vd);
+    }
+    viewport->PlatformUserData = viewport->PlatformHandle = nullptr;
+}
+
+static void ImGui_ImplSDL2_ShowWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+#if defined(_WIN32) && !(defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP || WINAPI_FAMILY == WINAPI_FAMILY_GAMES))
+    HWND hwnd = (HWND)viewport->PlatformHandleRaw;
+
+    // SDL hack: Hide icon from task bar
+    // Note: SDL 2.0.6+ has a SDL_WINDOW_SKIP_TASKBAR flag which is supported under Windows but the way it create the window breaks our seamless transition.
+    if (viewport->Flags & ImGuiViewportFlags_NoTaskBarIcon)
+    {
+        LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
+        ex_style &= ~WS_EX_APPWINDOW;
+        ex_style |= WS_EX_TOOLWINDOW;
+        ::SetWindowLong(hwnd, GWL_EXSTYLE, ex_style);
+    }
+#endif
+
+#if SDL_HAS_SHOW_WINDOW_ACTIVATION_HINT
+    SDL_SetHint(SDL_HINT_WINDOW_NO_ACTIVATION_WHEN_SHOWN, (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing) ? "1" : "0");
+#elif defined(_WIN32)
+    // SDL hack: SDL always activate/focus windows :/
+    if (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing)
+    {
+        ::ShowWindow(hwnd, SW_SHOWNA);
+        return;
+    }
+#endif
+    SDL_ShowWindow(vd->Window);
+}
+
+static ImVec2 ImGui_ImplSDL2_GetWindowPos(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    int x = 0, y = 0;
+    SDL_GetWindowPosition(vd->Window, &x, &y);
+    return ImVec2((float)x, (float)y);
+}
+
+static void ImGui_ImplSDL2_SetWindowPos(ImGuiViewport* viewport, ImVec2 pos)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowPosition(vd->Window, (int)pos.x, (int)pos.y);
+}
+
+static ImVec2 ImGui_ImplSDL2_GetWindowSize(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    int w = 0, h = 0;
+    SDL_GetWindowSize(vd->Window, &w, &h);
+    return ImVec2((float)w, (float)h);
+}
+
+static void ImGui_ImplSDL2_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowSize(vd->Window, (int)size.x, (int)size.y);
+}
+
+static void ImGui_ImplSDL2_SetWindowTitle(ImGuiViewport* viewport, const char* title)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowTitle(vd->Window, title);
+}
+
+#if SDL_HAS_WINDOW_ALPHA
+static void ImGui_ImplSDL2_SetWindowAlpha(ImGuiViewport* viewport, float alpha)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowOpacity(vd->Window, alpha);
+}
+#endif
+
+static void ImGui_ImplSDL2_SetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    SDL_RaiseWindow(vd->Window);
+}
+
+static bool ImGui_ImplSDL2_GetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    return (SDL_GetWindowFlags(vd->Window) & SDL_WINDOW_INPUT_FOCUS) != 0;
+}
+
+static bool ImGui_ImplSDL2_GetWindowMinimized(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    return (SDL_GetWindowFlags(vd->Window) & SDL_WINDOW_MINIMIZED) != 0;
+}
+
+static void ImGui_ImplSDL2_RenderWindow(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    if (vd->GLContext)
+        SDL_GL_MakeCurrent(vd->Window, vd->GLContext);
+}
+
+static void ImGui_ImplSDL2_SwapBuffers(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    if (vd->GLContext)
+    {
+        SDL_GL_MakeCurrent(vd->Window, vd->GLContext);
+        SDL_GL_SwapWindow(vd->Window);
+    }
+}
+
+// Vulkan support (the Vulkan renderer needs to call a platform-side support function to create the surface)
+// SDL is graceful enough to _not_ need <vulkan/vulkan.h> so we can safely include this.
+#if SDL_HAS_VULKAN
+#include <SDL_vulkan.h>
+static int ImGui_ImplSDL2_CreateVkSurface(ImGuiViewport* viewport, ImU64 vk_instance, const void* vk_allocator, ImU64* out_vk_surface)
+{
+    ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
+    (void)vk_allocator;
+    SDL_bool ret = SDL_Vulkan_CreateSurface(vd->Window, (VkInstance)vk_instance, (VkSurfaceKHR*)out_vk_surface);
+    return ret ? 0 : 1; // ret ? VK_SUCCESS : VK_NOT_READY
+}
+#endif // SDL_HAS_VULKAN
+
+static void ImGui_ImplSDL2_InitMultiViewportSupport(SDL_Window* window, void* sdl_gl_context)
+{
+    // Register platform interface (will be coupled with a renderer interface)
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Platform_CreateWindow = ImGui_ImplSDL2_CreateWindow;
+    platform_io.Platform_DestroyWindow = ImGui_ImplSDL2_DestroyWindow;
+    platform_io.Platform_ShowWindow = ImGui_ImplSDL2_ShowWindow;
+    platform_io.Platform_SetWindowPos = ImGui_ImplSDL2_SetWindowPos;
+    platform_io.Platform_GetWindowPos = ImGui_ImplSDL2_GetWindowPos;
+    platform_io.Platform_SetWindowSize = ImGui_ImplSDL2_SetWindowSize;
+    platform_io.Platform_GetWindowSize = ImGui_ImplSDL2_GetWindowSize;
+    platform_io.Platform_SetWindowFocus = ImGui_ImplSDL2_SetWindowFocus;
+    platform_io.Platform_GetWindowFocus = ImGui_ImplSDL2_GetWindowFocus;
+    platform_io.Platform_GetWindowMinimized = ImGui_ImplSDL2_GetWindowMinimized;
+    platform_io.Platform_SetWindowTitle = ImGui_ImplSDL2_SetWindowTitle;
+    platform_io.Platform_RenderWindow = ImGui_ImplSDL2_RenderWindow;
+    platform_io.Platform_SwapBuffers = ImGui_ImplSDL2_SwapBuffers;
+#if SDL_HAS_WINDOW_ALPHA
+    platform_io.Platform_SetWindowAlpha = ImGui_ImplSDL2_SetWindowAlpha;
+#endif
+#if SDL_HAS_VULKAN
+    platform_io.Platform_CreateVkSurface = ImGui_ImplSDL2_CreateVkSurface;
+#endif
+
+    // Register main window handle (which is owned by the main application, not by us)
+    // This is mostly for simplicity and consistency, so that our code (e.g. mouse handling etc.) can use same logic for main and secondary viewports.
+    ImGuiViewport* main_viewport = ImGui::GetMainViewport();
+    ImGui_ImplSDL2_ViewportData* vd = IM_NEW(ImGui_ImplSDL2_ViewportData)();
+    vd->Window = window;
+    vd->WindowID = SDL_GetWindowID(window);
+    vd->WindowOwned = false;
+    vd->GLContext = sdl_gl_context;
+    main_viewport->PlatformUserData = vd;
+    main_viewport->PlatformHandle = (void*)(intptr_t)vd->WindowID;
+}
+
+static void ImGui_ImplSDL2_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
+}
+
 //-----------------------------------------------------------------------------
 
 #if defined(__clang__)

backends/imgui_impl_sdl2.h

@@ -6,9 +6,13 @@
 //  [X] Platform: Clipboard support.
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
 //  [X] Platform: Basic IME support. App needs to call 'SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");' before SDL_CreateWindow()!.
+//  [X] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
+// Missing features or Issues:
+//  [ ] Platform: Multi-viewport: Minimized windows seems to break mouse wheel events (at least under Windows).
+//  [ ] Platform: Multi-viewport: ParentViewportID not honored, and so io.ConfigViewportsNoDefaultParent has no effect (minor).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -38,20 +42,9 @@ IMGUI_IMPL_API void     ImGui_ImplSDL2_Shutdown();
 IMGUI_IMPL_API void     ImGui_ImplSDL2_NewFrame();
 IMGUI_IMPL_API bool     ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event);
 
-// DPI-related helpers (optional)
-IMGUI_IMPL_API float    ImGui_ImplSDL2_GetContentScaleForWindow(SDL_Window* window);
-IMGUI_IMPL_API float    ImGui_ImplSDL2_GetContentScaleForDisplay(int display_index);
-
 // Gamepad selection automatically starts in AutoFirst mode, picking first available SDL_Gamepad. You may override this.
 // When using manual mode, caller is responsible for opening/closing gamepad.
 enum ImGui_ImplSDL2_GamepadMode { ImGui_ImplSDL2_GamepadMode_AutoFirst, ImGui_ImplSDL2_GamepadMode_AutoAll, ImGui_ImplSDL2_GamepadMode_Manual };
 IMGUI_IMPL_API void     ImGui_ImplSDL2_SetGamepadMode(ImGui_ImplSDL2_GamepadMode mode, struct _SDL_GameController** manual_gamepads_array = nullptr, int manual_gamepads_count = -1);
 
-// (Advanced, for X11 users) Override Mouse Capture mode. Mouse capture allows receiving updated mouse position after clicking inside our window and dragging outside it.
-// Having this 'Enabled' is in theory always better. But, on X11 if you crash/break to debugger while capture is active you may temporarily lose access to your mouse.
-// The best solution is to setup your debugger to automatically release capture, e.g. 'setxkbmap -option grab:break_actions && xdotool key XF86Ungrab' or via a GDB script. See #3650.
-// But you may independently decide on X11, when a debugger is attached, to set this value to ImGui_ImplSDL2_MouseCaptureMode_Disabled.
-enum ImGui_ImplSDL2_MouseCaptureMode { ImGui_ImplSDL2_MouseCaptureMode_Enabled, ImGui_ImplSDL2_MouseCaptureMode_EnabledAfterDrag, ImGui_ImplSDL2_MouseCaptureMode_Disabled };
-IMGUI_IMPL_API void     ImGui_ImplSDL2_SetMouseCaptureMode(ImGui_ImplSDL2_MouseCaptureMode mode);
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_sdl3.cpp

@@ -1,14 +1,19 @@
-// dear imgui: Platform Backend for SDL3
-// This needs to be used along with a Renderer (e.g. SDL_GPU, DirectX11, OpenGL3, Vulkan..)
+// dear imgui: Platform Backend for SDL3 (*EXPERIMENTAL*)
+// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
 // (Info: SDL3 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
 
+// (**IMPORTANT: SDL 3.0.0 is NOT YET RELEASED AND CURRENTLY HAS A FAST CHANGING API. THIS CODE BREAKS OFTEN AS SDL3 CHANGES.**)
+
 // Implemented features:
 //  [X] Platform: Clipboard support.
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
-//  [X] Platform: IME support.
+//  [x] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable' -> the OS animation effect when window gets created/destroyed is problematic. SDL2 backend doesn't have issue.
+// Missing features or Issues:
+//  [ ] Platform: Multi-viewport: Minimized windows seems to break mouse wheel events (at least under Windows).
+//  [x] Platform: IME support. Position somehow broken in SDL3 + app needs to call 'SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");' before SDL_CreateWindow()!.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -20,24 +25,8 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-02-13: Inputs: systems other than X11 are back to starting mouse capture on mouse down (reverts 2025-02-26 change). Only X11 requires waiting for a drag by default (not ideal, but a better default for X11 users). Added ImGui_ImplSDL3_SetMouseCaptureMode() for X11 debugger users. (#3650, #6410, #9235)
-//  2026-01-15: Changed GetClipboardText() handler to return nullptr on error aka clipboard contents is not text. Consistent with other backends. (#9168)
-//  2025-11-05: Fixed an issue with missing characters events when an already active text field changes viewports. (#9054)
-//  2025-10-22: Fixed Platform_OpenInShellFn() return value (unused in core).
-//  2025-09-24: Skip using the SDL_GetGlobalMouseState() state when one of our window is hovered, as the SDL_EVENT_MOUSE_MOTION data is reliable. Fix macOS notch mouse coordinates issue in fullscreen mode + better perf on X11. (#7919, #7786)
-//  2025-09-18: Call platform_io.ClearPlatformHandlers() on shutdown.
-//  2025-09-15: Use SDL_GetWindowDisplayScale() on Mac to output DisplayFrameBufferScale. The function is more reliable during resolution changes e.g. going fullscreen. (#8703, #4414)
-//  2025-06-27: IME: avoid calling SDL_StartTextInput() again if already active. (#8727)
-//  2025-04-22: IME: honor ImGuiPlatformImeData->WantTextInput as an alternative way to call SDL_StartTextInput(), without IME being necessarily visible.
-//  2025-04-09: Don't attempt to call SDL_CaptureMouse() on drivers where we don't call SDL_GetGlobalMouseState(). (#8561)
-//  2025-03-30: Update for SDL3 api changes: Revert SDL_GetClipboardText() memory ownership change. (#8530, #7801)
-//  2025-03-21: Fill gamepad inputs and set ImGuiBackendFlags_HasGamepad regardless of ImGuiConfigFlags_NavEnableGamepad being set.
-//  2025-03-10: When dealing with OEM keys, use scancodes instead of translated keycodes to choose ImGuiKey values. (#7136, #7201, #7206, #7306, #7670, #7672, #8468)
-//  2025-02-26: Only start SDL_CaptureMouse() when mouse is being dragged, to mitigate issues with e.g. Linux debuggers not claiming capture back. (#6410, #3650)
-//  2025-02-24: Avoid calling SDL_GetGlobalMouseState() when mouse is in relative mode.
-//  2025-02-18: Added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress mouse cursor support.
-//  2025-02-10: Using SDL_OpenURL() in platform_io.Platform_OpenInShellFn handler.
-//  2025-01-20: Made ImGui_ImplSDL3_SetGamepadMode(ImGui_ImplSDL3_GamepadMode_Manual) accept an empty array.
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
+//  2024-09-11: (Docking) Added support for viewport->ParentViewportId field to support parenting at OS level. (#7973)
 //  2024-10-24: Emscripten: SDL_EVENT_MOUSE_WHEEL event doesn't require dividing by 100.0f on Emscripten.
 //  2024-09-03: Update for SDL3 api changes: SDL_GetGamepads() memory ownership revert. (#7918, #7898, #7807)
 //  2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
@@ -72,13 +61,11 @@
 // Clang warnings with -Weverything
 #if defined(__clang__)
 #pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wold-style-cast"                 // warning: use of old-style cast
 #pragma clang diagnostic ignored "-Wimplicit-int-float-conversion"  // warning: implicit conversion from 'xxx' to 'float' may lose precision
 #endif
 
 // SDL
 #include <SDL3/SDL.h>
-#include <stdio.h>              // for snprintf()
 #if defined(__APPLE__)
 #include <TargetConditionals.h>
 #endif
@@ -111,12 +98,11 @@ struct ImGui_ImplSDL3_Data
     SDL_Renderer*           Renderer;
     Uint64                  Time;
     char*                   ClipboardTextData;
-    char                    BackendPlatformName[48];
+    bool                    UseVulkan;
+    bool                    WantUpdateMonitors;
 
     // IME handling
     SDL_Window*             ImeWindow;
-    ImGuiPlatformImeData    ImeData;
-    bool                    ImeDirty;
 
     // Mouse handling
     Uint32                  MouseWindowID;
@@ -125,12 +111,12 @@ struct ImGui_ImplSDL3_Data
     SDL_Cursor*             MouseLastCursor;
     int                     MousePendingLeaveFrame;
     bool                    MouseCanUseGlobalState;
-    ImGui_ImplSDL3_MouseCaptureMode MouseCaptureMode;
+    bool                    MouseCanReportHoveredViewport;  // This is hard to use/unreliable on SDL so we'll set ImGuiBackendFlags_HasMouseHoveredViewport dynamically based on state.
 
     // Gamepad handling
-    ImVector<SDL_Gamepad*>      Gamepads;
+    ImVector<SDL_Gamepad*>  Gamepads;
     ImGui_ImplSDL3_GamepadMode  GamepadMode;
-    bool                        WantUpdateGamepadsList;
+    bool                    WantUpdateGamepadsList;
 
     ImGui_ImplSDL3_Data()   { memset((void*)this, 0, sizeof(*this)); }
 };
@@ -145,7 +131,9 @@ static ImGui_ImplSDL3_Data* ImGui_ImplSDL3_GetBackendData()
 }
 
 // Forward Declarations
-static void ImGui_ImplSDL3_UpdateIme();
+static void ImGui_ImplSDL3_UpdateMonitors();
+static void ImGui_ImplSDL3_InitMultiViewportSupport(SDL_Window* window, void* sdl_gl_context);
+static void ImGui_ImplSDL3_ShutdownMultiViewportSupport();
 
 // Functions
 static const char* ImGui_ImplSDL3_GetClipboardText(ImGuiContext*)
@@ -153,10 +141,8 @@ static const char* ImGui_ImplSDL3_GetClipboardText(ImGuiContext*)
     ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
     if (bd->ClipboardTextData)
         SDL_free(bd->ClipboardTextData);
-    if (SDL_HasClipboardText())
-        bd->ClipboardTextData = SDL_GetClipboardText();
-    else
-        bd->ClipboardTextData = nullptr;
+    const char* sdl_clipboard_text = SDL_GetClipboardText();
+    bd->ClipboardTextData = sdl_clipboard_text ? SDL_strdup(sdl_clipboard_text) : nullptr;
     return bd->ClipboardTextData;
 }
 
@@ -165,50 +151,27 @@ static void ImGui_ImplSDL3_SetClipboardText(ImGuiContext*, const char* text)
     SDL_SetClipboardText(text);
 }
 
-static ImGuiViewport* ImGui_ImplSDL3_GetViewportForWindowID(SDL_WindowID window_id)
+static void ImGui_ImplSDL3_PlatformSetImeData(ImGuiContext*, ImGuiViewport* viewport, ImGuiPlatformImeData* data)
 {
     ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
-    return (window_id == bd->WindowID) ? ImGui::GetMainViewport() : nullptr;
-}
-
-static void ImGui_ImplSDL3_PlatformSetImeData(ImGuiContext*, ImGuiViewport*, ImGuiPlatformImeData* data)
-{
-    ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
-    bd->ImeData = *data;
-    bd->ImeDirty = true;
-    ImGui_ImplSDL3_UpdateIme();
-}
-
-// We discard viewport passed via ImGuiPlatformImeData and always call SDL_StartTextInput() on SDL_GetKeyboardFocus().
-static void ImGui_ImplSDL3_UpdateIme()
-{
-    ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
-    ImGuiPlatformImeData* data = &bd->ImeData;
-    SDL_Window* window = SDL_GetKeyboardFocus();
-
-    // Stop previous input
-    if ((!(data->WantVisible || data->WantTextInput) || bd->ImeWindow != window) && bd->ImeWindow != nullptr)
+    SDL_WindowID window_id = (SDL_WindowID)(intptr_t)viewport->PlatformHandle;
+    SDL_Window* window = SDL_GetWindowFromID(window_id);
+    if ((data->WantVisible == false || bd->ImeWindow != window) && bd->ImeWindow != nullptr)
     {
         SDL_StopTextInput(bd->ImeWindow);
         bd->ImeWindow = nullptr;
     }
-    if ((!bd->ImeDirty && bd->ImeWindow == window) || (window == nullptr))
-        return;
-
-    // Start/update current input
-    bd->ImeDirty = false;
     if (data->WantVisible)
     {
         SDL_Rect r;
-        r.x = (int)data->InputPos.x;
-        r.y = (int)data->InputPos.y;
+        r.x = (int)(data->InputPos.x - viewport->Pos.x);
+        r.y = (int)(data->InputPos.y - viewport->Pos.y + data->InputLineHeight);
         r.w = 1;
         r.h = (int)data->InputLineHeight;
         SDL_SetTextInputArea(window, &r, 0);
+        SDL_StartTextInput(window);
         bd->ImeWindow = window;
     }
-    if (!SDL_TextInputActive(window) && (data->WantVisible || data->WantTextInput))
-        SDL_StartTextInput(window);
 }
 
 // Not static to allow third-party code to use that if they want to (but undocumented)
@@ -254,17 +217,17 @@ ImGuiKey ImGui_ImplSDL3_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode sca
         case SDLK_SPACE: return ImGuiKey_Space;
         case SDLK_RETURN: return ImGuiKey_Enter;
         case SDLK_ESCAPE: return ImGuiKey_Escape;
-        //case SDLK_APOSTROPHE: return ImGuiKey_Apostrophe;
+        case SDLK_APOSTROPHE: return ImGuiKey_Apostrophe;
         case SDLK_COMMA: return ImGuiKey_Comma;
-        //case SDLK_MINUS: return ImGuiKey_Minus;
+        case SDLK_MINUS: return ImGuiKey_Minus;
         case SDLK_PERIOD: return ImGuiKey_Period;
-        //case SDLK_SLASH: return ImGuiKey_Slash;
+        case SDLK_SLASH: return ImGuiKey_Slash;
         case SDLK_SEMICOLON: return ImGuiKey_Semicolon;
-        //case SDLK_EQUALS: return ImGuiKey_Equal;
-        //case SDLK_LEFTBRACKET: return ImGuiKey_LeftBracket;
-        //case SDLK_BACKSLASH: return ImGuiKey_Backslash;
-        //case SDLK_RIGHTBRACKET: return ImGuiKey_RightBracket;
-        //case SDLK_GRAVE: return ImGuiKey_GraveAccent;
+        case SDLK_EQUALS: return ImGuiKey_Equal;
+        case SDLK_LEFTBRACKET: return ImGuiKey_LeftBracket;
+        case SDLK_BACKSLASH: return ImGuiKey_Backslash;
+        case SDLK_RIGHTBRACKET: return ImGuiKey_RightBracket;
+        case SDLK_GRAVE: return ImGuiKey_GraveAccent;
         case SDLK_CAPSLOCK: return ImGuiKey_CapsLock;
         case SDLK_SCROLLLOCK: return ImGuiKey_ScrollLock;
         case SDLK_NUMLOCKCLEAR: return ImGuiKey_NumLock;
@@ -343,24 +306,6 @@ ImGuiKey ImGui_ImplSDL3_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode sca
         case SDLK_AC_FORWARD: return ImGuiKey_AppForward;
         default: break;
     }
-
-    // Fallback to scancode
-    switch (scancode)
-    {
-    case SDL_SCANCODE_GRAVE: return ImGuiKey_GraveAccent;
-    case SDL_SCANCODE_MINUS: return ImGuiKey_Minus;
-    case SDL_SCANCODE_EQUALS: return ImGuiKey_Equal;
-    case SDL_SCANCODE_LEFTBRACKET: return ImGuiKey_LeftBracket;
-    case SDL_SCANCODE_RIGHTBRACKET: return ImGuiKey_RightBracket;
-    case SDL_SCANCODE_NONUSBACKSLASH: return ImGuiKey_Oem102;
-    case SDL_SCANCODE_BACKSLASH: return ImGuiKey_Backslash;
-    case SDL_SCANCODE_SEMICOLON: return ImGuiKey_Semicolon;
-    case SDL_SCANCODE_APOSTROPHE: return ImGuiKey_Apostrophe;
-    case SDL_SCANCODE_COMMA: return ImGuiKey_Comma;
-    case SDL_SCANCODE_PERIOD: return ImGuiKey_Period;
-    case SDL_SCANCODE_SLASH: return ImGuiKey_Slash;
-    default: break;
-    }
     return ImGuiKey_None;
 }
 
@@ -373,6 +318,11 @@ static void ImGui_ImplSDL3_UpdateKeyModifiers(SDL_Keymod sdl_key_mods)
     io.AddKeyEvent(ImGuiMod_Super, (sdl_key_mods & SDL_KMOD_GUI) != 0);
 }
 
+static ImGuiViewport* ImGui_ImplSDL3_GetViewportForWindowID(SDL_WindowID window_id)
+{
+    return ImGui::FindViewportByPlatformHandle((void*)(intptr_t)window_id);
+}
+
 // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
 // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
 // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
@@ -390,6 +340,13 @@ bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event)
             if (ImGui_ImplSDL3_GetViewportForWindowID(event->motion.windowID) == nullptr)
                 return false;
             ImVec2 mouse_pos((float)event->motion.x, (float)event->motion.y);
+            if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+            {
+                int window_x, window_y;
+                SDL_GetWindowPosition(SDL_GetWindowFromID(event->motion.windowID), &window_x, &window_y);
+                mouse_pos.x += window_x;
+                mouse_pos.y += window_y;
+            }
             io.AddMouseSourceEvent(event->motion.which == SDL_TOUCH_MOUSEID ? ImGuiMouseSource_TouchScreen : ImGuiMouseSource_Mouse);
             io.AddMousePosEvent(mouse_pos.x, mouse_pos.y);
             return true;
@@ -440,7 +397,16 @@ bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event)
             //    (event->type == SDL_EVENT_KEY_DOWN) ? "DOWN" : "UP  ", event->key.key, SDL_GetKeyName(event->key.key), event->key.scancode, SDL_GetScancodeName(event->key.scancode), event->key.mod);
             ImGuiKey key = ImGui_ImplSDL3_KeyEventToImGuiKey(event->key.key, event->key.scancode);
             io.AddKeyEvent(key, (event->type == SDL_EVENT_KEY_DOWN));
-            io.SetKeyEventNativeData(key, (int)event->key.key, (int)event->key.scancode, (int)event->key.scancode); // To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions.
+            io.SetKeyEventNativeData(key, event->key.key, event->key.scancode, event->key.scancode); // To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions.
+            return true;
+        }
+        case SDL_EVENT_DISPLAY_ORIENTATION:
+        case SDL_EVENT_DISPLAY_ADDED:
+        case SDL_EVENT_DISPLAY_REMOVED:
+        case SDL_EVENT_DISPLAY_MOVED:
+        case SDL_EVENT_DISPLAY_CONTENT_SCALE_CHANGED:
+        {
+            bd->WantUpdateMonitors = true;
             return true;
         }
         case SDL_EVENT_WINDOW_MOUSE_ENTER:
@@ -470,14 +436,27 @@ bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event)
             io.AddFocusEvent(event->type == SDL_EVENT_WINDOW_FOCUS_GAINED);
             return true;
         }
+        case SDL_EVENT_WINDOW_CLOSE_REQUESTED:
+        case SDL_EVENT_WINDOW_MOVED:
+        case SDL_EVENT_WINDOW_RESIZED:
+        {
+            ImGuiViewport* viewport = ImGui_ImplSDL3_GetViewportForWindowID(event->window.windowID);
+            if (viewport == NULL)
+                return false;
+            if (event->type == SDL_EVENT_WINDOW_CLOSE_REQUESTED)
+                viewport->PlatformRequestClose = true;
+            if (event->type == SDL_EVENT_WINDOW_MOVED)
+                viewport->PlatformRequestMove = true;
+            if (event->type == SDL_EVENT_WINDOW_RESIZED)
+                viewport->PlatformRequestResize = true;
+            return true;
+        }
         case SDL_EVENT_GAMEPAD_ADDED:
         case SDL_EVENT_GAMEPAD_REMOVED:
         {
             bd->WantUpdateGamepadsList = true;
             return true;
         }
-        default:
-            break;
     }
     return false;
 }
@@ -488,7 +467,7 @@ static void ImGui_ImplSDL3_SetupPlatformHandles(ImGuiViewport* viewport, SDL_Win
     viewport->PlatformHandleRaw = nullptr;
 #if defined(_WIN32) && !defined(__WINRT__)
     viewport->PlatformHandleRaw = (HWND)SDL_GetPointerProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_WIN32_HWND_POINTER, nullptr);
-#elif defined(__APPLE__)
+#elif defined(__APPLE__) && defined(SDL_VIDEO_DRIVER_COCOA)
     viewport->PlatformHandleRaw = SDL_GetPointerProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_COCOA_WINDOW_POINTER, nullptr);
 #endif
 }
@@ -499,43 +478,47 @@ static bool ImGui_ImplSDL3_Init(SDL_Window* window, SDL_Renderer* renderer, void
     IMGUI_CHECKVERSION();
     IM_ASSERT(io.BackendPlatformUserData == nullptr && "Already initialized a platform backend!");
     IM_UNUSED(sdl_gl_context); // Unused in this branch
-    //SDL_SetHint(SDL_HINT_EVENT_LOGGING, "2");
 
-    const int ver_linked = SDL_GetVersion();
+    // Check and store if we are on a SDL backend that supports global mouse position
+    // ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
+    bool mouse_can_use_global_state = false;
+#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
+    const char* sdl_backend = SDL_GetCurrentVideoDriver();
+    const char* global_mouse_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
+    for (int n = 0; n < IM_ARRAYSIZE(global_mouse_whitelist); n++)
+        if (strncmp(sdl_backend, global_mouse_whitelist[n], strlen(global_mouse_whitelist[n])) == 0)
+            mouse_can_use_global_state = true;
+#endif
 
     // Setup backend capabilities flags
     ImGui_ImplSDL3_Data* bd = IM_NEW(ImGui_ImplSDL3_Data)();
-    snprintf(bd->BackendPlatformName, sizeof(bd->BackendPlatformName), "imgui_impl_sdl3 (%d.%d.%d; %d.%d.%d)",
-        SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_MICRO_VERSION, SDL_VERSIONNUM_MAJOR(ver_linked), SDL_VERSIONNUM_MINOR(ver_linked), SDL_VERSIONNUM_MICRO(ver_linked));
     io.BackendPlatformUserData = (void*)bd;
-    io.BackendPlatformName = bd->BackendPlatformName;
+    io.BackendPlatformName = "imgui_impl_sdl3";
     io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;           // We can honor GetMouseCursor() values (optional)
     io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos;            // We can honor io.WantSetMousePos requests (optional, rarely used)
+    if (mouse_can_use_global_state)
+        io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports;  // We can create multi-viewports on the Platform side (optional)
 
     bd->Window = window;
     bd->WindowID = SDL_GetWindowID(window);
     bd->Renderer = renderer;
 
-    // Check and store if we are on a SDL backend that supports SDL_GetGlobalMouseState() and SDL_CaptureMouse()
-    // ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
-    bd->MouseCanUseGlobalState = false;
-    bd->MouseCaptureMode = ImGui_ImplSDL3_MouseCaptureMode_Disabled;
-#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
-    const char* sdl_backend = SDL_GetCurrentVideoDriver();
-    const char* capture_and_global_state_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
-    for (const char* item : capture_and_global_state_whitelist)
-        if (strncmp(sdl_backend, item, strlen(item)) == 0)
-        {
-            bd->MouseCanUseGlobalState = true;
-            bd->MouseCaptureMode = (strcmp(item, "x11") == 0) ? ImGui_ImplSDL3_MouseCaptureMode_EnabledAfterDrag : ImGui_ImplSDL3_MouseCaptureMode_Enabled;
-        }
+    // SDL on Linux/OSX doesn't report events for unfocused windows (see https://github.com/ocornut/imgui/issues/4960)
+    // We will use 'MouseCanReportHoveredViewport' to set 'ImGuiBackendFlags_HasMouseHoveredViewport' dynamically each frame.
+    bd->MouseCanUseGlobalState = mouse_can_use_global_state;
+#ifndef __APPLE__
+    bd->MouseCanReportHoveredViewport = bd->MouseCanUseGlobalState;
+#else
+    bd->MouseCanReportHoveredViewport = false;
 #endif
 
     ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
     platform_io.Platform_SetClipboardTextFn = ImGui_ImplSDL3_SetClipboardText;
     platform_io.Platform_GetClipboardTextFn = ImGui_ImplSDL3_GetClipboardText;
     platform_io.Platform_SetImeDataFn = ImGui_ImplSDL3_PlatformSetImeData;
-    platform_io.Platform_OpenInShellFn = [](ImGuiContext*, const char* url) { return SDL_OpenURL(url); };
+
+    // Update monitor a first time during init
+    ImGui_ImplSDL3_UpdateMonitors();
 
     // Gamepad handling
     bd->GamepadMode = ImGui_ImplSDL3_GamepadMode_AutoFirst;
@@ -550,8 +533,6 @@ static bool ImGui_ImplSDL3_Init(SDL_Window* window, SDL_Renderer* renderer, void
     bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NESW_RESIZE);
     bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NWSE_RESIZE);
     bd->MouseCursors[ImGuiMouseCursor_Hand] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_POINTER);
-    bd->MouseCursors[ImGuiMouseCursor_Wait] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_WAIT);
-    bd->MouseCursors[ImGuiMouseCursor_Progress] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_PROGRESS);
     bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NOT_ALLOWED);
 
     // Set platform dependent data in viewport
@@ -563,12 +544,20 @@ static bool ImGui_ImplSDL3_Init(SDL_Window* window, SDL_Renderer* renderer, void
     // Without this, when clicking to gain focus, our widgets wouldn't activate even though they showed as hovered.
     // (This is unfortunately a global SDL setting, so enabling it might have a side-effect on your application.
     // It is unlikely to make a difference, but if your app absolutely needs to ignore the initial on-focus click:
-    // you can ignore SDL_EVENT_MOUSE_BUTTON_DOWN events coming right after a SDL_EVENT_WINDOW_FOCUS_GAINED)
+    // you can ignore SDL_EVENT_MOUSE_BUTTON_DOWN events coming right after a SDL_WINDOWEVENT_FOCUS_GAINED)
     SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1");
 
     // From 2.0.22: Disable auto-capture, this is preventing drag and drop across multiple windows (see #5710)
     SDL_SetHint(SDL_HINT_MOUSE_AUTO_CAPTURE, "0");
 
+    // SDL 3.x : see https://github.com/libsdl-org/SDL/issues/6659
+    SDL_SetHint("SDL_BORDERLESS_WINDOWED_STYLE", "0");
+
+    // We need SDL_CaptureMouse(), SDL_GetGlobalMouseState() from SDL 2.0.4+ to support multiple viewports.
+    // We left the call to ImGui_ImplSDL3_InitPlatformInterface() outside of #ifdef to avoid unused-function warnings.
+    if (io.BackendFlags & ImGuiBackendFlags_PlatformHasViewports)
+        ImGui_ImplSDL3_InitMultiViewportSupport(window, sdl_gl_context);
+
     return true;
 }
 
@@ -580,7 +569,11 @@ bool ImGui_ImplSDL3_InitForOpenGL(SDL_Window* window, void* sdl_gl_context)
 
 bool ImGui_ImplSDL3_InitForVulkan(SDL_Window* window)
 {
-    return ImGui_ImplSDL3_Init(window, nullptr, nullptr);
+    if (!ImGui_ImplSDL3_Init(window, nullptr, nullptr))
+        return false;
+    ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
+    bd->UseVulkan = true;
+    return true;
 }
 
 bool ImGui_ImplSDL3_InitForD3D(SDL_Window* window)
@@ -618,7 +611,8 @@ void ImGui_ImplSDL3_Shutdown()
     ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
     IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+
+    ImGui_ImplSDL3_ShutdownMultiViewportSupport();
 
     if (bd->ClipboardTextData)
         SDL_free(bd->ClipboardTextData);
@@ -628,19 +622,11 @@ void ImGui_ImplSDL3_Shutdown()
 
     io.BackendPlatformName = nullptr;
     io.BackendPlatformUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos | ImGuiBackendFlags_HasGamepad);
-    platform_io.ClearPlatformHandlers();
+    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos | ImGuiBackendFlags_HasGamepad | ImGuiBackendFlags_PlatformHasViewports | ImGuiBackendFlags_HasMouseHoveredViewport);
     IM_DELETE(bd);
 }
 
-void ImGui_ImplSDL3_SetMouseCaptureMode(ImGui_ImplSDL3_MouseCaptureMode mode)
-{
-    ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
-    if (mode == ImGui_ImplSDL3_MouseCaptureMode_Disabled && bd->MouseCaptureMode != ImGui_ImplSDL3_MouseCaptureMode_Disabled)
-        SDL_CaptureMouse(false);
-    bd->MouseCaptureMode = mode;
-}
-
+// This code is incredibly messy because some of the functions we need for full viewport support are not available in SDL < 2.0.4.
 static void ImGui_ImplSDL3_UpdateMouseData()
 {
     ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
@@ -648,23 +634,10 @@ static void ImGui_ImplSDL3_UpdateMouseData()
 
     // We forward mouse input when hovered or captured (via SDL_EVENT_MOUSE_MOTION) or when focused (below)
 #if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
-    // - SDL_CaptureMouse() let the OS know e.g. that our drags can extend outside of parent boundaries (we want updated position) and shouldn't trigger other operations outside.
-    // - Debuggers under Linux tends to leave captured mouse on break, which may be very inconvenient, so to mitigate the issue on X11 we we wait until mouse has moved to begin capture.
-    if (bd->MouseCaptureMode == ImGui_ImplSDL3_MouseCaptureMode_Enabled)
-    {
-        SDL_CaptureMouse(bd->MouseButtonsDown != 0);
-    }
-    else if (bd->MouseCaptureMode == ImGui_ImplSDL3_MouseCaptureMode_EnabledAfterDrag)
-    {
-        bool want_capture = false;
-        for (int button_n = 0; button_n < ImGuiMouseButton_COUNT && !want_capture; button_n++)
-            if (ImGui::IsMouseDragging(button_n, 1.0f))
-                want_capture = true;
-        SDL_CaptureMouse(want_capture);
-    }
-
+    // SDL_CaptureMouse() let the OS know e.g. that our imgui drag outside the SDL window boundaries shouldn't e.g. trigger other operations outside
+    SDL_CaptureMouse(bd->MouseButtonsDown != 0);
     SDL_Window* focused_window = SDL_GetKeyboardFocus();
-    const bool is_app_focused = (bd->Window == focused_window);
+    const bool is_app_focused = (focused_window && (bd->Window == focused_window || ImGui_ImplSDL3_GetViewportForWindowID(SDL_GetWindowID(focused_window)) != NULL));
 #else
     SDL_Window* focused_window = bd->Window;
     const bool is_app_focused = (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_INPUT_FOCUS) != 0; // SDL 2.0.3 and non-windowed systems: single-viewport only
@@ -673,24 +646,47 @@ static void ImGui_ImplSDL3_UpdateMouseData()
     {
         // (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when io.ConfigNavMoveSetMousePos is enabled by user)
         if (io.WantSetMousePos)
-            SDL_WarpMouseInWindow(bd->Window, io.MousePos.x, io.MousePos.y);
+        {
+#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
+            if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+                SDL_WarpMouseGlobal(io.MousePos.x, io.MousePos.y);
+            else
+#endif
+                SDL_WarpMouseInWindow(bd->Window, io.MousePos.x, io.MousePos.y);
+        }
 
-        // (Optional) Fallback to provide unclamped mouse position when focused but not hovered (SDL_EVENT_MOUSE_MOTION already provides this when hovered or captured)
-        // Note that SDL_GetGlobalMouseState() is in theory slow on X11, but this only runs on rather specific cases. If a problem we may provide a way to opt-out this feature.
-        SDL_Window* hovered_window = SDL_GetMouseFocus();
-        const bool is_relative_mouse_mode = SDL_GetWindowRelativeMouseMode(bd->Window);
-        if (hovered_window == nullptr && bd->MouseCanUseGlobalState && bd->MouseButtonsDown == 0 && !is_relative_mouse_mode)
+        // (Optional) Fallback to provide mouse position when focused (SDL_EVENT_MOUSE_MOTION already provides this when hovered or captured)
+        if (bd->MouseCanUseGlobalState && bd->MouseButtonsDown == 0)
         {
             // Single-viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window)
+            // Multi-viewport mode: mouse position in OS absolute coordinates (io.MousePos is (0,0) when the mouse is on the upper-left of the primary monitor)
             float mouse_x, mouse_y;
             int window_x, window_y;
             SDL_GetGlobalMouseState(&mouse_x, &mouse_y);
-            SDL_GetWindowPosition(focused_window, &window_x, &window_y);
-            mouse_x -= (float)window_x;
-            mouse_y -= (float)window_y;
-            io.AddMousePosEvent(mouse_x, mouse_y);
+            if (!(io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable))
+            {
+                SDL_GetWindowPosition(focused_window, &window_x, &window_y);
+                mouse_x -= window_x;
+                mouse_y -= window_y;
+            }
+            io.AddMousePosEvent((float)mouse_x, (float)mouse_y);
         }
     }
+
+    // (Optional) When using multiple viewports: call io.AddMouseViewportEvent() with the viewport the OS mouse cursor is hovering.
+    // If ImGuiBackendFlags_HasMouseHoveredViewport is not set by the backend, Dear imGui will ignore this field and infer the information using its flawed heuristic.
+    // - [!] SDL backend does NOT correctly ignore viewports with the _NoInputs flag.
+    //       Some backend are not able to handle that correctly. If a backend report an hovered viewport that has the _NoInputs flag (e.g. when dragging a window
+    //       for docking, the viewport has the _NoInputs flag in order to allow us to find the viewport under), then Dear ImGui is forced to ignore the value reported
+    //       by the backend, and use its flawed heuristic to guess the viewport behind.
+    // - [X] SDL backend correctly reports this regardless of another viewport behind focused and dragged from (we need this to find a useful drag and drop target).
+    if (io.BackendFlags & ImGuiBackendFlags_HasMouseHoveredViewport)
+    {
+        ImGuiID mouse_viewport_id = 0;
+        if (ImGuiViewport* mouse_viewport = ImGui_ImplSDL3_GetViewportForWindowID(bd->MouseWindowID))
+            mouse_viewport_id = mouse_viewport->ID;
+        io.AddMouseViewportEvent(mouse_viewport_id);
+    }
 }
 
 static void ImGui_ImplSDL3_UpdateMouseCursor()
@@ -734,7 +730,7 @@ void ImGui_ImplSDL3_SetGamepadMode(ImGui_ImplSDL3_GamepadMode mode, SDL_Gamepad*
     ImGui_ImplSDL3_CloseGamepads();
     if (mode == ImGui_ImplSDL3_GamepadMode_Manual)
     {
-        IM_ASSERT(manual_gamepads_array != nullptr || manual_gamepads_count <= 0);
+        IM_ASSERT(manual_gamepads_array != nullptr && manual_gamepads_count > 0);
         for (int n = 0; n < manual_gamepads_count; n++)
             bd->Gamepads.push_back(manual_gamepads_array[n]);
     }
@@ -789,6 +785,9 @@ static void ImGui_ImplSDL3_UpdateGamepads()
         SDL_free(sdl_gamepads);
     }
 
+    // FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
+    if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
+        return;
     io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
     if (bd->Gamepads.Size == 0)
         return;
@@ -822,27 +821,36 @@ static void ImGui_ImplSDL3_UpdateGamepads()
     ImGui_ImplSDL3_UpdateGamepadAnalog(bd, io, ImGuiKey_GamepadRStickDown,  SDL_GAMEPAD_AXIS_RIGHTY, +thumb_dead_zone, +32767);
 }
 
-static void ImGui_ImplSDL3_GetWindowSizeAndFramebufferScale(SDL_Window* window, ImVec2* out_size, ImVec2* out_framebuffer_scale)
+static void ImGui_ImplSDL3_UpdateMonitors()
 {
-    int w, h;
-    SDL_GetWindowSize(window, &w, &h);
-    if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)
-        w = h = 0;
+    ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Monitors.resize(0);
+    bd->WantUpdateMonitors = false;
 
-#if defined(__APPLE__)
-    float fb_scale_x = SDL_GetWindowDisplayScale(window); // Seems more reliable during resolution change (#8703)
-    float fb_scale_y = fb_scale_x;
-#else
-    int display_w, display_h;
-    SDL_GetWindowSizeInPixels(window, &display_w, &display_h);
-    float fb_scale_x = (w > 0) ? (float)display_w / (float)w : 1.0f;
-    float fb_scale_y = (h > 0) ? (float)display_h / (float)h : 1.0f;
-#endif
-
-    if (out_size != nullptr)
-        *out_size = ImVec2((float)w, (float)h);
-    if (out_framebuffer_scale != nullptr)
-        *out_framebuffer_scale = ImVec2(fb_scale_x, fb_scale_y);
+    int display_count;
+    SDL_DisplayID* displays = SDL_GetDisplays(&display_count);
+    for (int n = 0; n < display_count; n++)
+    {
+        // Warning: the validity of monitor DPI information on Windows depends on the application DPI awareness settings, which generally needs to be set in the manifest or at runtime.
+        SDL_DisplayID display_id = displays[n];
+        ImGuiPlatformMonitor monitor;
+        SDL_Rect r;
+        SDL_GetDisplayBounds(display_id, &r);
+        monitor.MainPos = monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
+        monitor.MainSize = monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
+        SDL_GetDisplayUsableBounds(display_id, &r);
+        monitor.WorkPos = ImVec2((float)r.x, (float)r.y);
+        monitor.WorkSize = ImVec2((float)r.w, (float)r.h);
+        // FIXME-VIEWPORT: On MacOS SDL reports actual monitor DPI scale, ignoring OS configuration. We may want to set
+        //  DpiScale to cocoa_window.backingScaleFactor here.
+        monitor.DpiScale = SDL_GetDisplayContentScale(display_id);
+        monitor.PlatformHandle = (void*)(intptr_t)n;
+        if (monitor.DpiScale <= 0.0f)
+            continue; // Some accessibility applications are declaring virtual monitors with a DPI of 0, see #7902.
+        platform_io.Monitors.push_back(monitor);
+    }
+    SDL_free(displays);
 }
 
 void ImGui_ImplSDL3_NewFrame()
@@ -851,16 +859,28 @@ void ImGui_ImplSDL3_NewFrame()
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplSDL3_Init()?");
     ImGuiIO& io = ImGui::GetIO();
 
-    // Setup main viewport size (every frame to accommodate for window resizing)
-    ImGui_ImplSDL3_GetWindowSizeAndFramebufferScale(bd->Window, &io.DisplaySize, &io.DisplayFramebufferScale);
+    // Setup display size (every frame to accommodate for window resizing)
+    int w, h;
+    int display_w, display_h;
+    SDL_GetWindowSize(bd->Window, &w, &h);
+    if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED)
+        w = h = 0;
+    SDL_GetWindowSizeInPixels(bd->Window, &display_w, &display_h);
+    io.DisplaySize = ImVec2((float)w, (float)h);
+    if (w > 0 && h > 0)
+        io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
 
-    // Setup time step (we could also use SDL_GetTicksNS() available since SDL3)
+    // Update monitors
+    if (bd->WantUpdateMonitors)
+        ImGui_ImplSDL3_UpdateMonitors();
+
+    // Setup time step (we don't use SDL_GetTicks() because it is using millisecond resolution)
     // (Accept SDL_GetPerformanceCounter() not returning a monotonically increasing value. Happens in VMs and Emscripten, see #6189, #6114, #3644)
     static Uint64 frequency = SDL_GetPerformanceFrequency();
     Uint64 current_time = SDL_GetPerformanceCounter();
     if (current_time <= bd->Time)
         current_time = bd->Time + 1;
-    io.DeltaTime = bd->Time > 0 ? (float)((double)(current_time - bd->Time) / (double)frequency) : (float)(1.0f / 60.0f);
+    io.DeltaTime = bd->Time > 0 ? (float)((double)(current_time - bd->Time) / frequency) : (float)(1.0f / 60.0f);
     bd->Time = current_time;
 
     if (bd->MousePendingLeaveFrame && bd->MousePendingLeaveFrame >= ImGui::GetFrameCount() && bd->MouseButtonsDown == 0)
@@ -870,14 +890,268 @@ void ImGui_ImplSDL3_NewFrame()
         io.AddMousePosEvent(-FLT_MAX, -FLT_MAX);
     }
 
+    // Our io.AddMouseViewportEvent() calls will only be valid when not capturing.
+    // Technically speaking testing for 'bd->MouseButtonsDown == 0' would be more rigorous, but testing for payload reduces noise and potential side-effects.
+    if (bd->MouseCanReportHoveredViewport && ImGui::GetDragDropPayload() == nullptr)
+        io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport;
+    else
+        io.BackendFlags &= ~ImGuiBackendFlags_HasMouseHoveredViewport;
+
     ImGui_ImplSDL3_UpdateMouseData();
     ImGui_ImplSDL3_UpdateMouseCursor();
-    ImGui_ImplSDL3_UpdateIme();
 
     // Update game controllers (if enabled and available)
     ImGui_ImplSDL3_UpdateGamepads();
 }
 
+//--------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+// Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
+struct ImGui_ImplSDL3_ViewportData
+{
+    SDL_Window*     Window;
+    SDL_Window*     ParentWindow;
+    Uint32          WindowID;
+    bool            WindowOwned;
+    SDL_GLContext   GLContext;
+
+    ImGui_ImplSDL3_ViewportData() { Window = ParentWindow = nullptr; WindowID = 0; WindowOwned = false; GLContext = nullptr; }
+    ~ImGui_ImplSDL3_ViewportData() { IM_ASSERT(Window == nullptr && GLContext == nullptr); }
+};
+
+static SDL_Window* ImGui_ImplSDL3_GetSDLWindowFromViewportID(ImGuiID viewport_id)
+{
+    if (viewport_id != 0)
+        if (ImGuiViewport* viewport = ImGui::FindViewportByID(viewport_id))
+        {
+            SDL_WindowID window_id = (SDL_WindowID)(intptr_t)viewport->PlatformHandle;
+            return SDL_GetWindowFromID(window_id);
+        }
+    return nullptr;
+}
+
+static void ImGui_ImplSDL3_CreateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
+    ImGui_ImplSDL3_ViewportData* vd = IM_NEW(ImGui_ImplSDL3_ViewportData)();
+    viewport->PlatformUserData = vd;
+
+    vd->ParentWindow = ImGui_ImplSDL3_GetSDLWindowFromViewportID(viewport->ParentViewportId);
+
+    ImGuiViewport* main_viewport = ImGui::GetMainViewport();
+    ImGui_ImplSDL3_ViewportData* main_viewport_data = (ImGui_ImplSDL3_ViewportData*)main_viewport->PlatformUserData;
+
+    // Share GL resources with main context
+    bool use_opengl = (main_viewport_data->GLContext != nullptr);
+    SDL_GLContext backup_context = nullptr;
+    if (use_opengl)
+    {
+        backup_context = SDL_GL_GetCurrentContext();
+        SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
+        SDL_GL_MakeCurrent(main_viewport_data->Window, main_viewport_data->GLContext);
+    }
+
+    SDL_WindowFlags sdl_flags = 0;
+    sdl_flags |= use_opengl ? SDL_WINDOW_OPENGL : (bd->UseVulkan ? SDL_WINDOW_VULKAN : 0);
+    sdl_flags |= SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_HIGH_PIXEL_DENSITY;
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoDecoration) ? SDL_WINDOW_BORDERLESS : 0;
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoDecoration) ? 0 : SDL_WINDOW_RESIZABLE;
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_NoTaskBarIcon) ? SDL_WINDOW_UTILITY : 0;
+    sdl_flags |= (viewport->Flags & ImGuiViewportFlags_TopMost) ? SDL_WINDOW_ALWAYS_ON_TOP : 0;
+    vd->Window = SDL_CreateWindow("No Title Yet", (int)viewport->Size.x, (int)viewport->Size.y, sdl_flags);
+    SDL_SetWindowParent(vd->Window, vd->ParentWindow);
+    SDL_SetWindowPosition(vd->Window, (int)viewport->Pos.x, (int)viewport->Pos.y);
+    vd->WindowOwned = true;
+    if (use_opengl)
+    {
+        vd->GLContext = SDL_GL_CreateContext(vd->Window);
+        SDL_GL_SetSwapInterval(0);
+    }
+    if (use_opengl && backup_context)
+        SDL_GL_MakeCurrent(vd->Window, backup_context);
+
+    ImGui_ImplSDL3_SetupPlatformHandles(viewport, vd->Window);
+}
+
+static void ImGui_ImplSDL3_DestroyWindow(ImGuiViewport* viewport)
+{
+    if (ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData)
+    {
+        if (vd->GLContext && vd->WindowOwned)
+            SDL_GL_DestroyContext(vd->GLContext);
+        if (vd->Window && vd->WindowOwned)
+            SDL_DestroyWindow(vd->Window);
+        vd->GLContext = nullptr;
+        vd->Window = nullptr;
+        IM_DELETE(vd);
+    }
+    viewport->PlatformUserData = viewport->PlatformHandle = nullptr;
+}
+
+static void ImGui_ImplSDL3_ShowWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+#if defined(_WIN32) && !(defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP || WINAPI_FAMILY == WINAPI_FAMILY_GAMES))
+    HWND hwnd = (HWND)viewport->PlatformHandleRaw;
+
+    // SDL hack: Show icon in task bar (#7989)
+    // Note: SDL_WINDOW_UTILITY can be used to control task bar visibility, but on Windows, it does not affect child windows.
+    if (!(viewport->Flags & ImGuiViewportFlags_NoTaskBarIcon))
+    {
+        LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
+        ex_style |= WS_EX_APPWINDOW;
+        ex_style &= ~WS_EX_TOOLWINDOW;
+        ::ShowWindow(hwnd, SW_HIDE);
+        ::SetWindowLong(hwnd, GWL_EXSTYLE, ex_style);
+    }
+#endif
+
+    SDL_SetHint(SDL_HINT_WINDOW_ACTIVATE_WHEN_SHOWN, (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing) ? "0" : "1");
+    SDL_ShowWindow(vd->Window);
+}
+
+static void ImGui_ImplSDL3_UpdateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+
+    // Update SDL3 parent if it changed _after_ creation.
+    // This is for advanced apps that are manipulating ParentViewportID manually.
+    SDL_Window* new_parent = ImGui_ImplSDL3_GetSDLWindowFromViewportID(viewport->ParentViewportId);
+    if (new_parent != vd->ParentWindow)
+    {
+        vd->ParentWindow = new_parent;
+        SDL_SetWindowParent(vd->Window, vd->ParentWindow);
+    }
+}
+
+static ImVec2 ImGui_ImplSDL3_GetWindowPos(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    int x = 0, y = 0;
+    SDL_GetWindowPosition(vd->Window, &x, &y);
+    return ImVec2((float)x, (float)y);
+}
+
+static void ImGui_ImplSDL3_SetWindowPos(ImGuiViewport* viewport, ImVec2 pos)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowPosition(vd->Window, (int)pos.x, (int)pos.y);
+}
+
+static ImVec2 ImGui_ImplSDL3_GetWindowSize(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    int w = 0, h = 0;
+    SDL_GetWindowSize(vd->Window, &w, &h);
+    return ImVec2((float)w, (float)h);
+}
+
+static void ImGui_ImplSDL3_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowSize(vd->Window, (int)size.x, (int)size.y);
+}
+
+static void ImGui_ImplSDL3_SetWindowTitle(ImGuiViewport* viewport, const char* title)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowTitle(vd->Window, title);
+}
+
+static void ImGui_ImplSDL3_SetWindowAlpha(ImGuiViewport* viewport, float alpha)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    SDL_SetWindowOpacity(vd->Window, alpha);
+}
+
+static void ImGui_ImplSDL3_SetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    SDL_RaiseWindow(vd->Window);
+}
+
+static bool ImGui_ImplSDL3_GetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    return (SDL_GetWindowFlags(vd->Window) & SDL_WINDOW_INPUT_FOCUS) != 0;
+}
+
+static bool ImGui_ImplSDL3_GetWindowMinimized(ImGuiViewport* viewport)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    return (SDL_GetWindowFlags(vd->Window) & SDL_WINDOW_MINIMIZED) != 0;
+}
+
+static void ImGui_ImplSDL3_RenderWindow(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    if (vd->GLContext)
+        SDL_GL_MakeCurrent(vd->Window, vd->GLContext);
+}
+
+static void ImGui_ImplSDL3_SwapBuffers(ImGuiViewport* viewport, void*)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    if (vd->GLContext)
+    {
+        SDL_GL_MakeCurrent(vd->Window, vd->GLContext);
+        SDL_GL_SwapWindow(vd->Window);
+    }
+}
+
+// Vulkan support (the Vulkan renderer needs to call a platform-side support function to create the surface)
+// SDL is graceful enough to _not_ need <vulkan/vulkan.h> so we can safely include this.
+#include <SDL3/SDL_vulkan.h>
+static int ImGui_ImplSDL3_CreateVkSurface(ImGuiViewport* viewport, ImU64 vk_instance, const void* vk_allocator, ImU64* out_vk_surface)
+{
+    ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
+    (void)vk_allocator;
+    bool ret = SDL_Vulkan_CreateSurface(vd->Window, (VkInstance)vk_instance, (VkAllocationCallbacks*)vk_allocator, (VkSurfaceKHR*)out_vk_surface);
+    return ret ? 0 : 1; // ret ? VK_SUCCESS : VK_NOT_READY
+}
+
+static void ImGui_ImplSDL3_InitMultiViewportSupport(SDL_Window* window, void* sdl_gl_context)
+{
+    // Register platform interface (will be coupled with a renderer interface)
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Platform_CreateWindow = ImGui_ImplSDL3_CreateWindow;
+    platform_io.Platform_DestroyWindow = ImGui_ImplSDL3_DestroyWindow;
+    platform_io.Platform_ShowWindow = ImGui_ImplSDL3_ShowWindow;
+    platform_io.Platform_UpdateWindow = ImGui_ImplSDL3_UpdateWindow;
+    platform_io.Platform_SetWindowPos = ImGui_ImplSDL3_SetWindowPos;
+    platform_io.Platform_GetWindowPos = ImGui_ImplSDL3_GetWindowPos;
+    platform_io.Platform_SetWindowSize = ImGui_ImplSDL3_SetWindowSize;
+    platform_io.Platform_GetWindowSize = ImGui_ImplSDL3_GetWindowSize;
+    platform_io.Platform_SetWindowFocus = ImGui_ImplSDL3_SetWindowFocus;
+    platform_io.Platform_GetWindowFocus = ImGui_ImplSDL3_GetWindowFocus;
+    platform_io.Platform_GetWindowMinimized = ImGui_ImplSDL3_GetWindowMinimized;
+    platform_io.Platform_SetWindowTitle = ImGui_ImplSDL3_SetWindowTitle;
+    platform_io.Platform_RenderWindow = ImGui_ImplSDL3_RenderWindow;
+    platform_io.Platform_SwapBuffers = ImGui_ImplSDL3_SwapBuffers;
+    platform_io.Platform_SetWindowAlpha = ImGui_ImplSDL3_SetWindowAlpha;
+    platform_io.Platform_CreateVkSurface = ImGui_ImplSDL3_CreateVkSurface;
+
+    // Register main window handle (which is owned by the main application, not by us)
+    // This is mostly for simplicity and consistency, so that our code (e.g. mouse handling etc.) can use same logic for main and secondary viewports.
+    ImGuiViewport* main_viewport = ImGui::GetMainViewport();
+    ImGui_ImplSDL3_ViewportData* vd = IM_NEW(ImGui_ImplSDL3_ViewportData)();
+    vd->Window = window;
+    vd->WindowID = SDL_GetWindowID(window);
+    vd->WindowOwned = false;
+    vd->GLContext = (SDL_GLContext)sdl_gl_context;
+    main_viewport->PlatformUserData = vd;
+    main_viewport->PlatformHandle = (void*)(intptr_t)vd->WindowID;
+}
+
+static void ImGui_ImplSDL3_ShutdownMultiViewportSupport()
+{
+    ImGui::DestroyPlatformWindows();
+}
+
 //-----------------------------------------------------------------------------
 
 #if defined(__clang__)

backends/imgui_impl_sdl3.h

@@ -1,14 +1,19 @@
-// dear imgui: Platform Backend for SDL3
-// This needs to be used along with a Renderer (e.g. SDL_GPU, DirectX11, OpenGL3, Vulkan..)
+// dear imgui: Platform Backend for SDL3 (*EXPERIMENTAL*)
+// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
 // (Info: SDL3 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
 
+// (**IMPORTANT: SDL 3.0.0 is NOT YET RELEASED AND CURRENTLY HAS A FAST CHANGING API. THIS CODE BREAKS OFTEN AS SDL3 CHANGES.**)
+
 // Implemented features:
 //  [X] Platform: Clipboard support.
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
-//  [X] Platform: IME support.
+//  [x] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable' -> the OS animation effect when window gets created/destroyed is problematic. SDL2 backend doesn't have issue.
+// Missing features or Issues:
+//  [ ] Platform: Multi-viewport: Minimized windows seems to break mouse wheel events (at least under Windows).
+//  [x] Platform: IME support. Position somehow broken in SDL3 + app needs to call 'SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");' before SDL_CreateWindow()!.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -44,11 +49,4 @@ IMGUI_IMPL_API bool     ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event);
 enum ImGui_ImplSDL3_GamepadMode { ImGui_ImplSDL3_GamepadMode_AutoFirst, ImGui_ImplSDL3_GamepadMode_AutoAll, ImGui_ImplSDL3_GamepadMode_Manual };
 IMGUI_IMPL_API void     ImGui_ImplSDL3_SetGamepadMode(ImGui_ImplSDL3_GamepadMode mode, SDL_Gamepad** manual_gamepads_array = nullptr, int manual_gamepads_count = -1);
 
-// (Advanced, for X11 users) Override Mouse Capture mode. Mouse capture allows receiving updated mouse position after clicking inside our window and dragging outside it.
-// Having this 'Enabled' is in theory always better. But, on X11 if you crash/break to debugger while capture is active you may temporarily lose access to your mouse.
-// The best solution is to setup your debugger to automatically release capture, e.g. 'setxkbmap -option grab:break_actions && xdotool key XF86Ungrab' or via a GDB script. See #3650.
-// But you may independently decide on X11, when a debugger is attached, to set this value to ImGui_ImplSDL3_MouseCaptureMode_Disabled.
-enum ImGui_ImplSDL3_MouseCaptureMode { ImGui_ImplSDL3_MouseCaptureMode_Enabled, ImGui_ImplSDL3_MouseCaptureMode_EnabledAfterDrag, ImGui_ImplSDL3_MouseCaptureMode_Disabled };
-IMGUI_IMPL_API void     ImGui_ImplSDL3_SetMouseCaptureMode(ImGui_ImplSDL3_MouseCaptureMode mode);
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_sdlgpu3.cpp

@@ -2,9 +2,10 @@
 // This needs to be used along with the SDL3 Platform Backend
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'SDL_GPUTexture*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef! **IMPORTANT** Before 2025/08/08, ImTextureID was a reference to a SDL_GPUTextureSamplerBinding struct.
-//  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: User texture binding. Use simply cast a reference to your SDL_GPUTextureSamplerBinding to ImTextureID.
+//  [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices.
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
 // The aim of imgui_impl_sdlgpu3.h/.cpp is to be usable in your engine without any modification.
 // IF YOU FEEL YOU NEED TO MAKE ANY CHANGE TO THIS CODE, please share them and your feedback at https://github.com/ocornut/imgui/
@@ -18,66 +19,48 @@
 // - Introduction, links and more at the top of imgui.cpp
 
 // Important note to the reader who wish to integrate imgui_impl_sdlgpu3.cpp/.h in their own engine/app.
-// - Unlike other backends, the user must call the function ImGui_ImplSDLGPU3_PrepareDrawData() BEFORE issuing a SDL_GPURenderPass containing ImGui_ImplSDLGPU3_RenderDrawData.
+// - Unlike other backends, the user must call the function Imgui_ImplSDLGPU3_PrepareDrawData() BEFORE issuing a SDL_GPURenderPass containing ImGui_ImplSDLGPU3_RenderDrawData.
 //   Calling the function is MANDATORY, otherwise the ImGui will not upload neither the vertex nor the index buffer for the GPU. See imgui_impl_sdlgpu3.cpp for more info.
 
 // CHANGELOG
-//  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. Obsoleting samplers from ImGui_ImplSDLGPU3_RenderState. (#9378)
-//  2026-03-19: Fixed issue in ImGui_ImplSDLGPU3_DestroyTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295, #9310)
-//  2026-02-25: Removed unnecessary call to SDL_WaitForGPUIdle when releasing vertex/index buffers. (#9262)
-//  2025-11-26: macOS version can use MSL shaders in order to support macOS 10.14+ (vs Metallib shaders requiring macOS 14+). Requires calling SDL_CreateGPUDevice() with SDL_GPU_SHADERFORMAT_MSL.
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-08-20: Added ImGui_ImplSDLGPU3_InitInfo::SwapchainComposition and ImGui_ImplSDLGPU3_InitInfo::PresentMode to configure how secondary viewports are created.
-//  2025-08-08: *BREAKING* Changed ImTextureID type from SDL_GPUTextureSamplerBinding* to SDL_GPUTexture*, which is more natural and easier for user to manage. If you need to change the current sampler, you can access the ImGui_ImplSDLGPU3_RenderState struct. (#8866, #8163, #7998, #7988)
-//  2025-08-08: Expose SamplerDefault and SamplerCurrent in ImGui_ImplSDLGPU3_RenderState. Allow callback to change sampler.
-//  2025-06-25: Mapping transfer buffer for texture update use cycle=true. Fixes artifacts e.g. on Metal backend.
-//  2025-06-11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplSDLGPU3_CreateFontsTexture() and ImGui_ImplSDLGPU3_DestroyFontsTexture().
-//  2025-04-28: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
-//  2025-03-30: Made ImGui_ImplSDLGPU3_PrepareDrawData() reuse GPU Transfer Buffers which were unusually slow to recreate every frame. Much faster now.
-//  2025-03-21: Fixed typo in function name Imgui_ImplSDLGPU3_PrepareDrawData() -> ImGui_ImplSDLGPU3_PrepareDrawData().
-//  2025-01-16: Renamed ImGui_ImplSDLGPU3_InitInfo::GpuDevice to Device.
-//  2025-01-09: SDL_GPU: Added the SDL_GPU3 backend.
+//  2025-01-09: SDL_Gpu: Added the SDL_GPU3 backend.
 
 #include "imgui.h"
 #ifndef IMGUI_DISABLE
 #include "imgui_impl_sdlgpu3.h"
 #include "imgui_impl_sdlgpu3_shaders.h"
 
-// SDL_GPU Data
-
 // Reusable buffers used for rendering 1 current in-flight frame, for ImGui_ImplSDLGPU3_RenderDrawData()
 struct ImGui_ImplSDLGPU3_FrameData
 {
-    SDL_GPUBuffer*          VertexBuffer            = nullptr;
-    SDL_GPUTransferBuffer*  VertexTransferBuffer    = nullptr;
-    uint32_t                VertexBufferSize        = 0;
-    SDL_GPUBuffer*          IndexBuffer             = nullptr;
-    SDL_GPUTransferBuffer*  IndexTransferBuffer     = nullptr;
-    uint32_t                IndexBufferSize         = 0;
+    SDL_GPUBuffer*      VertexBuffer     = nullptr;
+    SDL_GPUBuffer*      IndexBuffer      = nullptr;
+    uint32_t            VertexBufferSize = 0;
+    uint32_t            IndexBufferSize  = 0;
 };
 
+// SDL_GPU Data
 struct ImGui_ImplSDLGPU3_Data
 {
-    ImGui_ImplSDLGPU3_InitInfo   InitInfo;
-
-    // Render state
-    ImGui_ImplSDLGPU3_RenderState*  RenderState         = nullptr; // == ImGui::GetPlatformIO().Renderer_RenderState during rendering.
-    SDL_GPUSampler*                 CurrentSampler      = nullptr;
+    ImGui_ImplSDLGPU3_InitInfo   GPUInitInfo;
 
     // Graphics pipeline & shaders
-    SDL_GPUShader*               VertexShader           = nullptr;
-    SDL_GPUShader*               FragmentShader         = nullptr;
-    SDL_GPUGraphicsPipeline*     Pipeline               = nullptr;
-    SDL_GPUSampler*              TexSamplerLinear       = nullptr;
-    SDL_GPUSampler*              TexSamplerNearest      = nullptr;
-    SDL_GPUTransferBuffer*       TexTransferBuffer      = nullptr;
-    uint32_t                     TexTransferBufferSize  = 0;
+    SDL_GPUShader*               VertexShader   = nullptr;
+    SDL_GPUShader*               FragmentShader = nullptr;
+    SDL_GPUGraphicsPipeline*     Pipeline       = nullptr;
+
+    // Font data
+    SDL_GPUSampler*              FontSampler = nullptr;
+    SDL_GPUTexture*              FontTexture = nullptr;
+    SDL_GPUTextureSamplerBinding FontBinding = { nullptr, nullptr };
 
     // Frame data for main window
     ImGui_ImplSDLGPU3_FrameData  MainWindowFrameData;
 };
 
 // Forward Declarations
+static bool ImGui_ImplSDLGPU3_CreateDeviceObjects();
+static void ImGui_ImplSDLGPU3_DestroyDeviceObjects();
 static void ImGui_ImplSDLGPU3_DestroyFrameData();
 
 //-----------------------------------------------------------------------------
@@ -92,13 +75,12 @@ static ImGui_ImplSDLGPU3_Data* ImGui_ImplSDLGPU3_GetBackendData()
     return ImGui::GetCurrentContext() ? (ImGui_ImplSDLGPU3_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
 }
 
-static void ImGui_ImplSDLGPU3_SetupRenderState(ImDrawData* draw_data, SDL_GPUGraphicsPipeline* pipeline, SDL_GPUCommandBuffer* command_buffer, SDL_GPURenderPass* render_pass, ImGui_ImplSDLGPU3_FrameData* fd, uint32_t fb_width, uint32_t fb_height)
+static void ImGui_ImplSDLGPU3_SetupRenderState(ImDrawData* draw_data, SDL_GPUGraphicsPipeline* pipeline, SDL_GPUCommandBuffer* command_buffer, SDL_GPURenderPass * render_pass, ImGui_ImplSDLGPU3_FrameData* fd, uint32_t fb_width, uint32_t fb_height)
 {
-    ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    bd->CurrentSampler = bd->TexSamplerLinear;
+    //ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
 
     // Bind graphics pipeline
-    SDL_BindGPUGraphicsPipeline(render_pass, pipeline);
+    SDL_BindGPUGraphicsPipeline(render_pass,pipeline);
 
     // Bind Vertex And Index Buffers
     if (draw_data->TotalVtxCount > 0)
@@ -109,8 +91,8 @@ static void ImGui_ImplSDLGPU3_SetupRenderState(ImDrawData* draw_data, SDL_GPUGra
         SDL_GPUBufferBinding index_buffer_binding = {};
         index_buffer_binding.buffer = fd->IndexBuffer;
         index_buffer_binding.offset = 0;
-        SDL_BindGPUVertexBuffers(render_pass,0, &vertex_buffer_binding, 1);
-        SDL_BindGPUIndexBuffer(render_pass, &index_buffer_binding, sizeof(ImDrawIdx) == 2 ? SDL_GPU_INDEXELEMENTSIZE_16BIT : SDL_GPU_INDEXELEMENTSIZE_32BIT);
+        SDL_BindGPUVertexBuffers(render_pass,0,&vertex_buffer_binding,1);
+        SDL_BindGPUIndexBuffer(render_pass,&index_buffer_binding,sizeof(ImDrawIdx) == 2 ? SDL_GPU_INDEXELEMENTSIZE_16BIT : SDL_GPU_INDEXELEMENTSIZE_32BIT);
     }
 
     // Setup viewport
@@ -121,7 +103,7 @@ static void ImGui_ImplSDLGPU3_SetupRenderState(ImDrawData* draw_data, SDL_GPUGra
     viewport.h = (float)fb_height;
     viewport.min_depth = 0.0f;
     viewport.max_depth = 1.0f;
-    SDL_SetGPUViewport(render_pass, &viewport);
+    SDL_SetGPUViewport(render_pass,&viewport);
 
     // Setup scale and translation
     // Our visible imgui space lies from draw_data->DisplayPps (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
@@ -133,34 +115,27 @@ static void ImGui_ImplSDLGPU3_SetupRenderState(ImDrawData* draw_data, SDL_GPUGra
     SDL_PushGPUVertexUniformData(command_buffer, 0, &ubo, sizeof(UBO));
 }
 
-static void CreateOrResizeBuffers(SDL_GPUBuffer** buffer, SDL_GPUTransferBuffer** transferbuffer, uint32_t* old_size, uint32_t new_size, SDL_GPUBufferUsageFlags usage)
+static void CreateOrResizeBuffer(SDL_GPUBuffer** buffer, uint32_t* old_size, uint32_t new_size, SDL_GPUBufferUsageFlags usage)
 {
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
 
-    // There is no need for calling SDL_WaitForGPUIdle here, as SDL3 will handle deferred buffer deletion automatically.
-    SDL_ReleaseGPUBuffer(v->Device, *buffer);
-    SDL_ReleaseGPUTransferBuffer(v->Device, *transferbuffer);
+    SDL_WaitForGPUIdle(v->GpuDevice);
+    SDL_ReleaseGPUBuffer(v->GpuDevice, *buffer);
 
     SDL_GPUBufferCreateInfo buffer_info = {};
     buffer_info.usage = usage;
     buffer_info.size = new_size;
     buffer_info.props = 0;
-    *buffer = SDL_CreateGPUBuffer(v->Device, &buffer_info);
+    *buffer = SDL_CreateGPUBuffer(v->GpuDevice, &buffer_info);
     *old_size = new_size;
     IM_ASSERT(*buffer != nullptr && "Failed to create GPU Buffer, call SDL_GetError() for more information");
-
-    SDL_GPUTransferBufferCreateInfo transferbuffer_info = {};
-    transferbuffer_info.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD;
-    transferbuffer_info.size = new_size;
-    *transferbuffer = SDL_CreateGPUTransferBuffer(v->Device, &transferbuffer_info);
-    IM_ASSERT(*transferbuffer != nullptr && "Failed to create GPU Transfer Buffer, call SDL_GetError() for more information");
 }
 
 // SDL_GPU doesn't allow copy passes to occur while a render or compute pass is bound!
 // The only way to allow a user to supply their own RenderPass (to render to a texture instead of the window for example),
 // is to split the upload part of ImGui_ImplSDLGPU3_RenderDrawData() to another function that needs to be called by the user before rendering.
-void ImGui_ImplSDLGPU3_PrepareDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffer* command_buffer)
+void Imgui_ImplSDLGPU3_PrepareDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffer* command_buffer)
 {
     // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
     int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
@@ -168,42 +143,49 @@ void ImGui_ImplSDLGPU3_PrepareDrawData(ImDrawData* draw_data, SDL_GPUCommandBuff
     if (fb_width <= 0 || fb_height <= 0 || draw_data->TotalVtxCount <= 0)
         return;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplSDLGPU3_UpdateTexture(tex);
-
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
     ImGui_ImplSDLGPU3_FrameData* fd = &bd->MainWindowFrameData;
 
-    uint32_t vertex_size = (uint32_t)draw_data->TotalVtxCount * sizeof(ImDrawVert);
-    uint32_t index_size  = (uint32_t)draw_data->TotalIdxCount * sizeof(ImDrawIdx);
+    uint32_t vertex_size = draw_data->TotalVtxCount * sizeof(ImDrawVert);
+    uint32_t index_size  = draw_data->TotalIdxCount * sizeof(ImDrawIdx);
     if (fd->VertexBuffer == nullptr || fd->VertexBufferSize < vertex_size)
-        CreateOrResizeBuffers(&fd->VertexBuffer, &fd->VertexTransferBuffer, &fd->VertexBufferSize, vertex_size, SDL_GPU_BUFFERUSAGE_VERTEX);
+        CreateOrResizeBuffer(&fd->VertexBuffer, &fd->VertexBufferSize, vertex_size, SDL_GPU_BUFFERUSAGE_VERTEX);
     if (fd->IndexBuffer == nullptr || fd->IndexBufferSize < index_size)
-        CreateOrResizeBuffers(&fd->IndexBuffer, &fd->IndexTransferBuffer, &fd->IndexBufferSize, index_size, SDL_GPU_BUFFERUSAGE_INDEX);
+        CreateOrResizeBuffer(&fd->IndexBuffer, &fd->IndexBufferSize, index_size, SDL_GPU_BUFFERUSAGE_INDEX);
 
-    ImDrawVert* vtx_dst = (ImDrawVert*)SDL_MapGPUTransferBuffer(v->Device, fd->VertexTransferBuffer, true);
-    ImDrawIdx* idx_dst = (ImDrawIdx*)SDL_MapGPUTransferBuffer(v->Device, fd->IndexTransferBuffer, true);
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    // FIXME: It feels like more code could be shared there.
+    SDL_GPUTransferBufferCreateInfo vertex_transferbuffer_info = {};
+    vertex_transferbuffer_info.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD;
+    vertex_transferbuffer_info.size = vertex_size;
+    SDL_GPUTransferBufferCreateInfo index_transferbuffer_info = {};
+    index_transferbuffer_info.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD;
+    index_transferbuffer_info.size = index_size;
+
+    SDL_GPUTransferBuffer* vertex_transferbuffer = SDL_CreateGPUTransferBuffer(v->GpuDevice, &vertex_transferbuffer_info);
+    IM_ASSERT(vertex_transferbuffer != nullptr && "Failed to create the vertex transfer buffer, call SDL_GetError() for more information");
+    SDL_GPUTransferBuffer* index_transferbuffer = SDL_CreateGPUTransferBuffer(v->GpuDevice, &index_transferbuffer_info);
+    IM_ASSERT(index_transferbuffer != nullptr && "Failed to create the index transfer buffer, call SDL_GetError() for more information");
+
+    ImDrawVert* vtx_dst = (ImDrawVert*)SDL_MapGPUTransferBuffer(v->GpuDevice, vertex_transferbuffer, true);
+    ImDrawIdx*  idx_dst = (ImDrawIdx*)SDL_MapGPUTransferBuffer(v->GpuDevice, index_transferbuffer, true);
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         memcpy(vtx_dst, draw_list->VtxBuffer.Data, draw_list->VtxBuffer.Size * sizeof(ImDrawVert));
         memcpy(idx_dst, draw_list->IdxBuffer.Data, draw_list->IdxBuffer.Size * sizeof(ImDrawIdx));
         vtx_dst += draw_list->VtxBuffer.Size;
         idx_dst += draw_list->IdxBuffer.Size;
     }
-    SDL_UnmapGPUTransferBuffer(v->Device, fd->VertexTransferBuffer);
-    SDL_UnmapGPUTransferBuffer(v->Device, fd->IndexTransferBuffer);
+    SDL_UnmapGPUTransferBuffer(v->GpuDevice, vertex_transferbuffer);
+    SDL_UnmapGPUTransferBuffer(v->GpuDevice, index_transferbuffer);
 
     SDL_GPUTransferBufferLocation vertex_buffer_location = {};
     vertex_buffer_location.offset = 0;
-    vertex_buffer_location.transfer_buffer = fd->VertexTransferBuffer;
+    vertex_buffer_location.transfer_buffer = vertex_transferbuffer;
     SDL_GPUTransferBufferLocation index_buffer_location = {};
     index_buffer_location.offset = 0;
-    index_buffer_location.transfer_buffer = fd->IndexTransferBuffer;
+    index_buffer_location.transfer_buffer = index_transferbuffer;
 
     SDL_GPUBufferRegion vertex_buffer_region = {};
     vertex_buffer_region.buffer = fd->VertexBuffer;
@@ -216,16 +198,13 @@ void ImGui_ImplSDLGPU3_PrepareDrawData(ImDrawData* draw_data, SDL_GPUCommandBuff
     index_buffer_region.size = index_size;
 
     SDL_GPUCopyPass* copy_pass = SDL_BeginGPUCopyPass(command_buffer);
-    SDL_UploadToGPUBuffer(copy_pass, &vertex_buffer_location, &vertex_buffer_region, true);
-    SDL_UploadToGPUBuffer(copy_pass, &index_buffer_location, &index_buffer_region, true);
+    SDL_UploadToGPUBuffer(copy_pass, &vertex_buffer_location, &vertex_buffer_region,true);
+    SDL_UploadToGPUBuffer(copy_pass, &index_buffer_location, &index_buffer_region,true);
     SDL_EndGPUCopyPass(copy_pass);
+    SDL_ReleaseGPUTransferBuffer(v->GpuDevice, index_transferbuffer);
+    SDL_ReleaseGPUTransferBuffer(v->GpuDevice, vertex_transferbuffer);
 }
 
-// Draw callbacks
-static void ImGui_ImplSDLGPU3_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)    {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplSDLGPU3_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)    { ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData(); bd->CurrentSampler = bd->TexSamplerLinear; }
-static void ImGui_ImplSDLGPU3_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)   { ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData(); bd->CurrentSampler = bd->TexSamplerNearest; }
-
 void ImGui_ImplSDLGPU3_RenderDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffer* command_buffer, SDL_GPURenderPass* render_pass, SDL_GPUGraphicsPipeline* pipeline)
 {
     // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
@@ -240,34 +219,25 @@ void ImGui_ImplSDLGPU3_RenderDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffe
     if (pipeline == nullptr)
         pipeline = bd->Pipeline;
 
+    ImGui_ImplSDLGPU3_SetupRenderState(draw_data, pipeline, command_buffer, render_pass, fd, fb_width, fb_height);
+
     // Will project scissor/clipping rectangles into framebuffer space
     ImVec2 clip_off = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
     ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
 
-    // Setup render state structure (for callbacks and custom texture bindings)
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    ImGui_ImplSDLGPU3_RenderState render_state;
-    render_state.Device = bd->InitInfo.Device;
-    platform_io.Renderer_RenderState = bd->RenderState = &render_state;
-
-    ImGui_ImplSDLGPU3_SetupRenderState(draw_data, pipeline, command_buffer, render_pass, fd, fb_width, fb_height);
-
     // Render command lists
     // (Because we merged all buffers into a single one, we maintain our own offset into them)
     int global_vtx_offset = 0;
     int global_idx_offset = 0;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback != nullptr)
             {
-                // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplSDLGPU3_DrawCallback_ResetRenderState)
-                    ImGui_ImplSDLGPU3_SetupRenderState(draw_data, pipeline, command_buffer, render_pass, fd, fb_width, fb_height);
-                else
-                    pcmd->UserCallback(draw_list, pcmd);
+                pcmd->UserCallback(draw_list, pcmd);
             }
             else
             {
@@ -278,8 +248,8 @@ void ImGui_ImplSDLGPU3_RenderDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffe
                 // Clamp to viewport as SDL_SetGPUScissor() won't accept values that are off bounds
                 if (clip_min.x < 0.0f) { clip_min.x = 0.0f; }
                 if (clip_min.y < 0.0f) { clip_min.y = 0.0f; }
-                if (clip_max.x > (float)fb_width) { clip_max.x = (float)fb_width; }
-                if (clip_max.y > (float)fb_height) { clip_max.y = (float)fb_height; }
+                if (clip_max.x > fb_width) { clip_max.x = (float)fb_width; }
+                if (clip_max.y > fb_height) { clip_max.y = (float)fb_height; }
                 if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
                     continue;
 
@@ -292,14 +262,9 @@ void ImGui_ImplSDLGPU3_RenderDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffe
                 SDL_SetGPUScissor(render_pass,&scissor_rect);
 
                 // Bind DescriptorSet with font or user texture
-                SDL_GPUTextureSamplerBinding texture_sampler_binding;
-                texture_sampler_binding.texture = (SDL_GPUTexture*)(intptr_t)pcmd->GetTexID();
-                texture_sampler_binding.sampler = bd->CurrentSampler;
-                SDL_BindGPUFragmentSamplers(render_pass, 0, &texture_sampler_binding, 1);
+                SDL_BindGPUFragmentSamplers(render_pass, 0, (SDL_GPUTextureSamplerBinding*)pcmd->GetTexID(), 1);
 
                 // Draw
-                // **IF YOU GET A CRASH HERE** In 1.92.2 on 2025/08/08 we have changed ImTextureID to store 'SDL_GPUTexture*' instead of storing 'SDL_GPUTextureSamplerBinding'.
-                // Any code loading custom texture using this backend needs to be updated.
                 SDL_DrawGPUIndexedPrimitives(render_pass, pcmd->ElemCount, 1, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset, 0);
             }
         }
@@ -313,121 +278,104 @@ void ImGui_ImplSDLGPU3_RenderDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffe
     // We perform a call to SDL_SetGPUScissor() to set back a full viewport which is likely to fix things for 99% users but technically this is not perfect. (See github #4644)
     SDL_Rect scissor_rect { 0, 0, fb_width, fb_height };
     SDL_SetGPUScissor(render_pass, &scissor_rect);
-
-    platform_io.Renderer_RenderState = bd->RenderState = nullptr;
 }
 
-static void ImGui_ImplSDLGPU3_DestroyTexture(ImTextureData* tex)
+bool ImGui_ImplSDLGPU3_CreateFontsTexture()
 {
+    ImGuiIO& io = ImGui::GetIO();
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    if (tex->GetTexID() != ImTextureID_Invalid)
-        if (SDL_GPUTexture* raw_tex = (SDL_GPUTexture*)(intptr_t)tex->GetTexID())
-            SDL_ReleaseGPUTexture(bd->InitInfo.Device, raw_tex);
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
 
-    // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-    tex->SetTexID(ImTextureID_Invalid);
-    tex->SetStatus(ImTextureStatus_Destroyed);
-}
-
-void ImGui_ImplSDLGPU3_UpdateTexture(ImTextureData* tex)
-{
-    ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
-
-    if (tex->Status == ImTextureStatus_WantCreate)
+    // Destroy existing texture (if any)
+    if (bd->FontTexture)
     {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
+        SDL_WaitForGPUIdle(v->GpuDevice);
+        ImGui_ImplSDLGPU3_DestroyFontsTexture();
+    }
 
-        // Create texture
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+    uint32_t upload_size = width * height * 4 * sizeof(char);
+
+    // Create the Image:
+    {
         SDL_GPUTextureCreateInfo texture_info = {};
-        texture_info.type = SDL_GPU_TEXTURETYPE_2D;
+        texture_info.type   = SDL_GPU_TEXTURETYPE_2D;
         texture_info.format = SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UNORM;
         texture_info.usage = SDL_GPU_TEXTUREUSAGE_SAMPLER;
-        texture_info.width = tex->Width;
-        texture_info.height = tex->Height;
+        texture_info.width  = width;
+        texture_info.height = height;
         texture_info.layer_count_or_depth = 1;
         texture_info.num_levels = 1;
         texture_info.sample_count = SDL_GPU_SAMPLECOUNT_1;
 
-        SDL_GPUTexture* raw_tex = SDL_CreateGPUTexture(v->Device, &texture_info);
-        IM_ASSERT(raw_tex != nullptr && "Failed to create texture, call SDL_GetError() for more info");
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)raw_tex);
+        bd->FontTexture = SDL_CreateGPUTexture(v->GpuDevice, &texture_info);
+        IM_ASSERT(bd->FontTexture && "Failed to create font texture, call SDL_GetError() for more info");
     }
 
-    if (tex->Status == ImTextureStatus_WantCreate || tex->Status == ImTextureStatus_WantUpdates)
+    // Assign the texture to the TextureSamplerBinding
+    bd->FontBinding.texture = bd->FontTexture;
+
+    // Create all the upload structures and upload:
     {
-        SDL_GPUTexture* raw_tex = (SDL_GPUTexture*)(intptr_t)tex->GetTexID();
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
+        SDL_GPUTransferBufferCreateInfo font_transferbuffer_info = {};
+        font_transferbuffer_info.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD;
+        font_transferbuffer_info.size = upload_size;
 
-        // Update full texture or selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->UpdateRect but you can use tex->Updates[] to upload individual regions.
-        // We could use the smaller rect on _WantCreate but using the full rect allows us to clear the texture.
-        const int upload_x = (tex->Status == ImTextureStatus_WantCreate) ? 0 : tex->UpdateRect.x;
-        const int upload_y = (tex->Status == ImTextureStatus_WantCreate) ? 0 : tex->UpdateRect.y;
-        const int upload_w = (tex->Status == ImTextureStatus_WantCreate) ? tex->Width : tex->UpdateRect.w;
-        const int upload_h = (tex->Status == ImTextureStatus_WantCreate) ? tex->Height : tex->UpdateRect.h;
-        uint32_t upload_pitch = upload_w * tex->BytesPerPixel;
-        uint32_t upload_size = upload_w * upload_h * tex->BytesPerPixel;
+        SDL_GPUTransferBuffer* font_transferbuffer = SDL_CreateGPUTransferBuffer(v->GpuDevice, &font_transferbuffer_info);
+        IM_ASSERT(font_transferbuffer != nullptr && "Failed to create font transfer buffer, call SDL_GetError() for more information");
 
-        // Create transfer buffer
-        if (bd->TexTransferBufferSize < upload_size)
-        {
-            SDL_ReleaseGPUTransferBuffer(v->Device, bd->TexTransferBuffer);
-            SDL_GPUTransferBufferCreateInfo transferbuffer_info = {};
-            transferbuffer_info.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD;
-            transferbuffer_info.size = upload_size + 1024;
-            bd->TexTransferBufferSize = upload_size + 1024;
-            bd->TexTransferBuffer = SDL_CreateGPUTransferBuffer(v->Device, &transferbuffer_info);
-            IM_ASSERT(bd->TexTransferBuffer != nullptr && "Failed to create transfer buffer, call SDL_GetError() for more information");
-        }
+        void* texture_ptr = SDL_MapGPUTransferBuffer(v->GpuDevice, font_transferbuffer, false);
+        memcpy(texture_ptr, pixels, upload_size);
+        SDL_UnmapGPUTransferBuffer(v->GpuDevice, font_transferbuffer);
 
-        // Copy to transfer buffer
-        {
-            void* texture_ptr = SDL_MapGPUTransferBuffer(v->Device, bd->TexTransferBuffer, true);
-            for (int y = 0; y < upload_h; y++)
-                memcpy((void*)((uintptr_t)texture_ptr + y * upload_pitch), tex->GetPixelsAt(upload_x, upload_y + y), upload_pitch);
-            SDL_UnmapGPUTransferBuffer(v->Device, bd->TexTransferBuffer);
-        }
+        SDL_GPUTextureTransferInfo font_transfer_info = {};
+        font_transfer_info.offset = 0;
+        font_transfer_info.transfer_buffer = font_transferbuffer;
 
-        SDL_GPUTextureTransferInfo transfer_info = {};
-        transfer_info.offset = 0;
-        transfer_info.transfer_buffer = bd->TexTransferBuffer;
+        SDL_GPUTextureRegion font_texture_region = {};
+        font_texture_region.texture = bd->FontTexture;
+        font_texture_region.w = width;
+        font_texture_region.h = height;
+        font_texture_region.d = 1;
 
-        SDL_GPUTextureRegion texture_region = {};
-        texture_region.texture = raw_tex;
-        texture_region.x = (Uint32)upload_x;
-        texture_region.y = (Uint32)upload_y;
-        texture_region.w = (Uint32)upload_w;
-        texture_region.h = (Uint32)upload_h;
-        texture_region.d = 1;
-
-        // Upload
-        {
-            SDL_GPUCommandBuffer* cmd = SDL_AcquireGPUCommandBuffer(v->Device);
-            SDL_GPUCopyPass* copy_pass = SDL_BeginGPUCopyPass(cmd);
-            SDL_UploadToGPUTexture(copy_pass, &transfer_info, &texture_region, false);
-            SDL_EndGPUCopyPass(copy_pass);
-            SDL_SubmitGPUCommandBuffer(cmd);
-        }
-
-        tex->SetStatus(ImTextureStatus_OK);
+        SDL_GPUCommandBuffer* cmd = SDL_AcquireGPUCommandBuffer(v->GpuDevice);
+        SDL_GPUCopyPass* copy_pass = SDL_BeginGPUCopyPass(cmd);
+        SDL_UploadToGPUTexture(copy_pass, &font_transfer_info, &font_texture_region, false);
+        SDL_EndGPUCopyPass(copy_pass);
+        SDL_SubmitGPUCommandBuffer(cmd);
+        SDL_ReleaseGPUTransferBuffer(v->GpuDevice, font_transferbuffer);
     }
-    if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
-        ImGui_ImplSDLGPU3_DestroyTexture(tex);
+
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)&bd->FontBinding);
+
+    return true;
 }
 
-static void ImGui_ImplSDLGPU3_CreateShaders()
+// You probably never need to call this, as it is called by ImGui_ImplSDLGPU3_CreateFontsTexture() and ImGui_ImplSDLGPU3_Shutdown().
+void ImGui_ImplSDLGPU3_DestroyFontsTexture()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
+    if (bd->FontTexture)
+    {
+        SDL_ReleaseGPUTexture(v->GpuDevice, bd->FontTexture);
+        bd->FontBinding.texture = nullptr;
+        bd->FontTexture = nullptr;
+    }
+    io.Fonts->SetTexID(0);
+}
+
+static void Imgui_ImplSDLGPU3_CreateShaders()
 {
     // Create the shader modules
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
 
-    const char* driver = SDL_GetGPUDeviceDriver(v->Device);
+    const char* driver = SDL_GetGPUDeviceDriver(v->GpuDevice);
 
     SDL_GPUShaderCreateInfo vertex_shader_info = {};
     vertex_shader_info.entrypoint = "main";
@@ -466,35 +414,18 @@ static void ImGui_ImplSDLGPU3_CreateShaders()
 #ifdef __APPLE__
     else
     {
-        SDL_GPUShaderFormat supported_formats = SDL_GetGPUShaderFormats(v->Device);
-        if (supported_formats & SDL_GPU_SHADERFORMAT_METALLIB)
-        {
-            // Using metallib blobs (macOS 14+, iOS)
-            vertex_shader_info.entrypoint = "main0";
-            vertex_shader_info.format = SDL_GPU_SHADERFORMAT_METALLIB;
-            vertex_shader_info.code = metallib_vertex;
-            vertex_shader_info.code_size = sizeof(metallib_vertex);
-            fragment_shader_info.entrypoint = "main0";
-            fragment_shader_info.format = SDL_GPU_SHADERFORMAT_METALLIB;
-            fragment_shader_info.code = metallib_fragment;
-            fragment_shader_info.code_size = sizeof(metallib_fragment);
-        }
-        else if (supported_formats & SDL_GPU_SHADERFORMAT_MSL)
-        {
-            // macOS: using MSL source
-            vertex_shader_info.entrypoint = "main0";
-            vertex_shader_info.format = SDL_GPU_SHADERFORMAT_MSL;
-            vertex_shader_info.code = msl_vertex;
-            vertex_shader_info.code_size = sizeof(msl_vertex);
-            fragment_shader_info.entrypoint = "main0";
-            fragment_shader_info.format = SDL_GPU_SHADERFORMAT_MSL;
-            fragment_shader_info.code = msl_fragment;
-            fragment_shader_info.code_size = sizeof(msl_fragment);
-        }
+        vertex_shader_info.entrypoint = "main0";
+        vertex_shader_info.format = SDL_GPU_SHADERFORMAT_METALLIB;
+        vertex_shader_info.code = metallib_vertex;
+        vertex_shader_info.code_size = sizeof(metallib_vertex);
+        fragment_shader_info.entrypoint = "main0";
+        fragment_shader_info.format = SDL_GPU_SHADERFORMAT_METALLIB;
+        fragment_shader_info.code = metallib_fragment;
+        fragment_shader_info.code_size = sizeof(metallib_fragment);
     }
 #endif
-    bd->VertexShader = SDL_CreateGPUShader(v->Device, &vertex_shader_info);
-    bd->FragmentShader = SDL_CreateGPUShader(v->Device, &fragment_shader_info);
+    bd->VertexShader = SDL_CreateGPUShader(v->GpuDevice, &vertex_shader_info);
+    bd->FragmentShader = SDL_CreateGPUShader(v->GpuDevice, &fragment_shader_info);
     IM_ASSERT(bd->VertexShader != nullptr && "Failed to create vertex shader, call SDL_GetError() for more information");
     IM_ASSERT(bd->FragmentShader != nullptr && "Failed to create fragment shader, call SDL_GetError() for more information");
 }
@@ -502,8 +433,8 @@ static void ImGui_ImplSDLGPU3_CreateShaders()
 static void ImGui_ImplSDLGPU3_CreateGraphicsPipeline()
 {
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
-    ImGui_ImplSDLGPU3_CreateShaders();
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
+    Imgui_ImplSDLGPU3_CreateShaders();
 
     SDL_GPUVertexBufferDescription vertex_buffer_desc[1];
     vertex_buffer_desc[0].slot = 0;
@@ -578,18 +509,16 @@ static void ImGui_ImplSDLGPU3_CreateGraphicsPipeline()
     pipeline_info.depth_stencil_state = depth_stencil_state;
     pipeline_info.target_info = target_info;
 
-    bd->Pipeline = SDL_CreateGPUGraphicsPipeline(v->Device, &pipeline_info);
+    bd->Pipeline = SDL_CreateGPUGraphicsPipeline(v->GpuDevice, &pipeline_info);
     IM_ASSERT(bd->Pipeline != nullptr && "Failed to create graphics pipeline, call SDL_GetError() for more information");
 }
 
-void ImGui_ImplSDLGPU3_CreateDeviceObjects()
+bool ImGui_ImplSDLGPU3_CreateDeviceObjects()
 {
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
 
-    ImGui_ImplSDLGPU3_DestroyDeviceObjects();
-
-    if (bd->TexSamplerLinear == nullptr)
+    if (!bd->FontSampler)
     {
         // Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling.
         SDL_GPUSamplerCreateInfo sampler_info = {};
@@ -602,54 +531,45 @@ void ImGui_ImplSDLGPU3_CreateDeviceObjects()
         sampler_info.mip_lod_bias = 0.0f;
         sampler_info.min_lod = -1000.0f;
         sampler_info.max_lod = 1000.0f;
-        sampler_info.enable_anisotropy = false;
+        sampler_info.enable_anisotropy = true;
         sampler_info.max_anisotropy = 1.0f;
         sampler_info.enable_compare = false;
-        bd->TexSamplerLinear = SDL_CreateGPUSampler(v->Device, &sampler_info);
-        IM_ASSERT(bd->TexSamplerLinear != nullptr && "Failed to create sampler, call SDL_GetError() for more information");
 
-        sampler_info.min_filter = SDL_GPU_FILTER_NEAREST;
-        sampler_info.mag_filter = SDL_GPU_FILTER_NEAREST;
-        sampler_info.mipmap_mode = SDL_GPU_SAMPLERMIPMAPMODE_NEAREST;
-        bd->TexSamplerNearest = SDL_CreateGPUSampler(v->Device, &sampler_info);
-        IM_ASSERT(bd->TexSamplerNearest != nullptr && "Failed to create sampler, call SDL_GetError() for more information");
+        bd->FontSampler = SDL_CreateGPUSampler(v->GpuDevice, &sampler_info);
+        bd->FontBinding.sampler = bd->FontSampler;
+        IM_ASSERT(bd->FontSampler != nullptr && "Failed to create font sampler, call SDL_GetError() for more information");
     }
 
     ImGui_ImplSDLGPU3_CreateGraphicsPipeline();
+
+    return true;
 }
 
 void ImGui_ImplSDLGPU3_DestroyFrameData()
 {
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
 
-    ImGui_ImplSDLGPU3_FrameData* fd = &bd->MainWindowFrameData;
-    SDL_ReleaseGPUBuffer(v->Device, fd->VertexBuffer);
-    SDL_ReleaseGPUBuffer(v->Device, fd->IndexBuffer);
-    SDL_ReleaseGPUTransferBuffer(v->Device, fd->VertexTransferBuffer);
-    SDL_ReleaseGPUTransferBuffer(v->Device, fd->IndexTransferBuffer);
-    fd->VertexBuffer = fd->IndexBuffer = nullptr;
-    fd->VertexTransferBuffer = fd->IndexTransferBuffer = nullptr;
-    fd->VertexBufferSize = fd->IndexBufferSize = 0;
+    SDL_ReleaseGPUBuffer(v->GpuDevice, bd->MainWindowFrameData.VertexBuffer);
+    SDL_ReleaseGPUBuffer(v->GpuDevice, bd->MainWindowFrameData.IndexBuffer);
+    bd->MainWindowFrameData.VertexBuffer = nullptr;
+    bd->MainWindowFrameData.IndexBuffer = nullptr;
+    bd->MainWindowFrameData.VertexBufferSize = 0;
+    bd->MainWindowFrameData.IndexBufferSize = 0;
 }
 
 void ImGui_ImplSDLGPU3_DestroyDeviceObjects()
 {
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
-    ImGui_ImplSDLGPU3_InitInfo* v = &bd->InitInfo;
+    ImGui_ImplSDLGPU3_InitInfo* v = &bd->GPUInitInfo;
 
     ImGui_ImplSDLGPU3_DestroyFrameData();
+    ImGui_ImplSDLGPU3_DestroyFontsTexture();
 
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-            ImGui_ImplSDLGPU3_DestroyTexture(tex);
-    if (bd->TexTransferBuffer)  { SDL_ReleaseGPUTransferBuffer(v->Device, bd->TexTransferBuffer); bd->TexTransferBuffer = nullptr; }
-    if (bd->VertexShader)       { SDL_ReleaseGPUShader(v->Device, bd->VertexShader); bd->VertexShader = nullptr; }
-    if (bd->FragmentShader)     { SDL_ReleaseGPUShader(v->Device, bd->FragmentShader); bd->FragmentShader = nullptr; }
-    if (bd->TexSamplerLinear)   { SDL_ReleaseGPUSampler(v->Device, bd->TexSamplerLinear); bd->TexSamplerLinear = nullptr; }
-    if (bd->TexSamplerNearest)  { SDL_ReleaseGPUSampler(v->Device, bd->TexSamplerNearest); bd->TexSamplerNearest = nullptr; }
-    if (bd->Pipeline)           { SDL_ReleaseGPUGraphicsPipeline(v->Device, bd->Pipeline); bd->Pipeline = nullptr; }
+    if (bd->VertexShader)   { SDL_ReleaseGPUShader(v->GpuDevice, bd->VertexShader); bd->VertexShader = nullptr;}
+    if (bd->FragmentShader) { SDL_ReleaseGPUShader(v->GpuDevice, bd->FragmentShader); bd->FragmentShader = nullptr;}
+    if (bd->FontSampler)    { SDL_ReleaseGPUSampler(v->GpuDevice, bd->FontSampler); bd->FontSampler = nullptr;}
+    if (bd->Pipeline)       { SDL_ReleaseGPUGraphicsPipeline(v->GpuDevice, bd->Pipeline); bd->Pipeline = nullptr;}
 }
 
 bool ImGui_ImplSDLGPU3_Init(ImGui_ImplSDLGPU3_InitInfo* info)
@@ -663,17 +583,13 @@ bool ImGui_ImplSDLGPU3_Init(ImGui_ImplSDLGPU3_InitInfo* info)
     io.BackendRendererUserData = (void*)bd;
     io.BackendRendererName = "imgui_impl_sdlgpu3";
     io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
 
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplSDLGPU3_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplSDLGPU3_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplSDLGPU3_DrawCallback_SetSamplerNearest;
-
-    IM_ASSERT(info->Device != nullptr);
+    IM_ASSERT(info->GpuDevice != nullptr);
     IM_ASSERT(info->ColorTargetFormat != SDL_GPU_TEXTUREFORMAT_INVALID);
 
-    bd->InitInfo = *info;
+    bd->GPUInitInfo = *info;
+
+    ImGui_ImplSDLGPU3_CreateDeviceObjects();
 
     return true;
 }
@@ -683,14 +599,11 @@ void ImGui_ImplSDLGPU3_Shutdown()
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
     IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 
     ImGui_ImplSDLGPU3_DestroyDeviceObjects();
-
     io.BackendRendererName = nullptr;
     io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
+    io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset;
     IM_DELETE(bd);
 }
 
@@ -699,8 +612,8 @@ void ImGui_ImplSDLGPU3_NewFrame()
     ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplSDLGPU3_Init()?");
 
-    if (!bd->TexSamplerLinear)
-        ImGui_ImplSDLGPU3_CreateDeviceObjects();
+    if (!bd->FontTexture)
+        ImGui_ImplSDLGPU3_CreateFontsTexture();
 }
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_sdlgpu3.h

@@ -2,9 +2,10 @@
 // This needs to be used along with the SDL3 Platform Backend
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'SDL_GPUTexture*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef! **IMPORTANT** Before 2025/08/08, ImTextureID was a reference to a SDL_GPUTextureSamplerBinding struct.
-//  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+//  [X] Renderer: User texture binding. Use simply cast a reference to your SDL_GPUTextureSamplerBinding to ImTextureID.
+//  [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices.
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
 // The aim of imgui_impl_sdlgpu3.h/.cpp is to be usable in your engine without any modification.
 // IF YOU FEEL YOU NEED TO MAKE ANY CHANGE TO THIS CODE, please share them and your feedback at https://github.com/ocornut/imgui/
@@ -18,7 +19,7 @@
 // - Introduction, links and more at the top of imgui.cpp
 
 // Important note to the reader who wish to integrate imgui_impl_sdlgpu3.cpp/.h in their own engine/app.
-// - Unlike other backends, the user must call the function ImGui_ImplSDLGPU_PrepareDrawData BEFORE issuing a SDL_GPURenderPass containing ImGui_ImplSDLGPU_RenderDrawData.
+// - Unline other backends, the user must call the function Imgui_ImplSDLGPU_PrepareDrawData BEFORE issuing a SDL_GPURenderPass containing ImGui_ImplSDLGPU_RenderDrawData.
 //   Calling the function is MANDATORY, otherwise the ImGui will not upload neither the vertex nor the index buffer for the GPU. See imgui_impl_sdlgpu3.cpp for more info.
 
 #pragma once
@@ -27,36 +28,21 @@
 #include <SDL3/SDL_gpu.h>
 
 // Initialization data, for ImGui_ImplSDLGPU_Init()
-// - Remember to set ColorTargetFormat to the correct format. If you're rendering to the swapchain, call SDL_GetGPUSwapchainTextureFormat() to query the right value
+// - Remember to set ColorTargetFormat to the correct format. If you're rendering to the swapchain, call SDL_GetGPUSwapchainTextureFormat to query the right value
 struct ImGui_ImplSDLGPU3_InitInfo
 {
-    SDL_GPUDevice*              Device                  = nullptr;
-    SDL_GPUTextureFormat        ColorTargetFormat       = SDL_GPU_TEXTUREFORMAT_INVALID;
-    SDL_GPUSampleCount          MSAASamples             = SDL_GPU_SAMPLECOUNT_1;
-    SDL_GPUSwapchainComposition SwapchainComposition    = SDL_GPU_SWAPCHAINCOMPOSITION_SDR;     // Only used in multi-viewports mode.
-    SDL_GPUPresentMode          PresentMode             = SDL_GPU_PRESENTMODE_VSYNC;            // Only used in multi-viewports mode.
+    SDL_GPUDevice*       GpuDevice          = nullptr;
+    SDL_GPUTextureFormat ColorTargetFormat  = SDL_GPU_TEXTUREFORMAT_INVALID;
+    SDL_GPUSampleCount   MSAASamples        = SDL_GPU_SAMPLECOUNT_1;
 };
 
 // Follow "Getting Started" link and check examples/ folder to learn about using backends!
-IMGUI_IMPL_API bool     ImGui_ImplSDLGPU3_Init(ImGui_ImplSDLGPU3_InitInfo* info);
-IMGUI_IMPL_API void     ImGui_ImplSDLGPU3_Shutdown();
-IMGUI_IMPL_API void     ImGui_ImplSDLGPU3_NewFrame();
-IMGUI_IMPL_API void     ImGui_ImplSDLGPU3_PrepareDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffer* command_buffer);
-IMGUI_IMPL_API void     ImGui_ImplSDLGPU3_RenderDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffer* command_buffer, SDL_GPURenderPass* render_pass, SDL_GPUGraphicsPipeline* pipeline = nullptr);
-
-// Use if you want to reset your rendering device without losing Dear ImGui state.
-IMGUI_IMPL_API void     ImGui_ImplSDLGPU3_CreateDeviceObjects();
-IMGUI_IMPL_API void     ImGui_ImplSDLGPU3_DestroyDeviceObjects();
-
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplSDLGPU3_UpdateTexture(ImTextureData* tex);
-
-// [BETA] Selected render state data shared with callbacks.
-// This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplSDLGPU3_RenderDrawData() call.
-// (Please open an issue if you feel you need access to more data)
-struct ImGui_ImplSDLGPU3_RenderState
-{
-    SDL_GPUDevice*      Device;
-};
+IMGUI_IMPL_API bool    ImGui_ImplSDLGPU3_Init(ImGui_ImplSDLGPU3_InitInfo* info);
+IMGUI_IMPL_API void    ImGui_ImplSDLGPU3_Shutdown();
+IMGUI_IMPL_API void    ImGui_ImplSDLGPU3_NewFrame();
+IMGUI_IMPL_API void    Imgui_ImplSDLGPU3_PrepareDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffer* command_buffer);
+IMGUI_IMPL_API void    ImGui_ImplSDLGPU3_RenderDrawData(ImDrawData* draw_data, SDL_GPUCommandBuffer* command_buffer, SDL_GPURenderPass* render_pass, SDL_GPUGraphicsPipeline* pipeline = nullptr);
+IMGUI_IMPL_API bool    ImGui_ImplSDLGPU3_CreateFontsTexture();
+IMGUI_IMPL_API void    ImGui_ImplSDLGPU3_DestroyFontsTexture();
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_sdlgpu3_shaders.h

@@ -221,40 +221,6 @@ const uint8_t metallib_fragment[3787]  = {
     148,161,0,0,0,0,109,97,105,110,48,97,105,114,46,115,97,109,112,108,101,95,116,101,120,116,117,114,101,95,50,100,46,118,52,102,51,50,51,50,48,50,51,46,51,54,56,97,105,114,54,52,45,97,
     112,112,108,101,45,109,97,99,111,115,120,49,52,46,48,46,48,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 };
-static uint8_t msl_vertex[800] =
-{
-    35,105,110,99,108,117,100,101,32,60,109,101,116,97,108,95,115,116,100,108,105,98,62,10,35,105,110,99,108,117,100,101,32,60,115,105,109,100,47,115,105,109,100,46,104,62,10,10,117,115,
-    105,110,103,32,110,97,109,101,115,112,97,99,101,32,109,101,116,97,108,59,10,10,115,116,114,117,99,116,32,95,57,10,123,10,32,32,32,32,102,108,111,97,116,52,32,67,111,108,111,114,59,
-    10,32,32,32,32,102,108,111,97,116,50,32,85,86,59,10,125,59,10,10,115,116,114,117,99,116,32,85,66,79,10,123,10,32,32,32,32,102,108,111,97,116,50,32,117,83,99,97,108,101,59,10,32,32,
-    32,32,102,108,111,97,116,50,32,117,84,114,97,110,115,108,97,116,101,59,10,125,59,10,10,115,116,114,117,99,116,32,109,97,105,110,48,95,111,117,116,10,123,10,32,32,32,32,102,108,111,
-    97,116,52,32,79,117,116,95,67,111,108,111,114,32,91,91,117,115,101,114,40,108,111,99,110,48,41,93,93,59,10,32,32,32,32,102,108,111,97,116,50,32,79,117,116,95,85,86,32,91,91,117,115,
-    101,114,40,108,111,99,110,49,41,93,93,59,10,32,32,32,32,102,108,111,97,116,52,32,103,108,95,80,111,115,105,116,105,111,110,32,91,91,112,111,115,105,116,105,111,110,93,93,59,10,125,
-    59,10,10,115,116,114,117,99,116,32,109,97,105,110,48,95,105,110,10,123,10,32,32,32,32,102,108,111,97,116,50,32,97,80,111,115,32,91,91,97,116,116,114,105,98,117,116,101,40,48,41,93,
-    93,59,10,32,32,32,32,102,108,111,97,116,50,32,97,85,86,32,91,91,97,116,116,114,105,98,117,116,101,40,49,41,93,93,59,10,32,32,32,32,102,108,111,97,116,52,32,97,67,111,108,111,114,32,
-    91,91,97,116,116,114,105,98,117,116,101,40,50,41,93,93,59,10,125,59,10,10,118,101,114,116,101,120,32,109,97,105,110,48,95,111,117,116,32,109,97,105,110,48,40,109,97,105,110,48,95,105,
-    110,32,105,110,32,91,91,115,116,97,103,101,95,105,110,93,93,44,32,99,111,110,115,116,97,110,116,32,85,66,79,38,32,117,98,111,32,91,91,98,117,102,102,101,114,40,48,41,93,93,41,10,123,
-    10,32,32,32,32,109,97,105,110,48,95,111,117,116,32,111,117,116,32,61,32,123,125,59,10,32,32,32,32,95,57,32,79,117,116,32,61,32,123,125,59,10,32,32,32,32,79,117,116,46,67,111,108,111,
-    114,32,61,32,105,110,46,97,67,111,108,111,114,59,10,32,32,32,32,79,117,116,46,85,86,32,61,32,105,110,46,97,85,86,59,10,32,32,32,32,111,117,116,46,103,108,95,80,111,115,105,116,105,
-    111,110,32,61,32,102,108,111,97,116,52,40,40,105,110,46,97,80,111,115,32,42,32,117,98,111,46,117,83,99,97,108,101,41,32,43,32,117,98,111,46,117,84,114,97,110,115,108,97,116,101,44,
-    32,48,46,48,44,32,49,46,48,41,59,10,32,32,32,32,111,117,116,46,103,108,95,80,111,115,105,116,105,111,110,46,121,32,42,61,32,40,45,49,46,48,41,59,10,32,32,32,32,111,117,116,46,79,117,
-    116,95,67,111,108,111,114,32,61,32,79,117,116,46,67,111,108,111,114,59,10,32,32,32,32,111,117,116,46,79,117,116,95,85,86,32,61,32,79,117,116,46,85,86,59,10,32,32,32,32,114,101,116,
-    117,114,110,32,111,117,116,59,10,125,10,10,
-};
-static uint8_t msl_fragment[580] =
-{
-    35,105,110,99,108,117,100,101,32,60,109,101,116,97,108,95,115,116,100,108,105,98,62,10,35,105,110,99,108,117,100,101,32,60,115,105,109,100,47,115,105,109,100,46,104,62,10,10,117,115,
-    105,110,103,32,110,97,109,101,115,112,97,99,101,32,109,101,116,97,108,59,10,10,115,116,114,117,99,116,32,95,49,49,10,123,10,32,32,32,32,102,108,111,97,116,52,32,67,111,108,111,114,
-    59,10,32,32,32,32,102,108,111,97,116,50,32,85,86,59,10,125,59,10,10,115,116,114,117,99,116,32,109,97,105,110,48,95,111,117,116,10,123,10,32,32,32,32,102,108,111,97,116,52,32,102,67,
-    111,108,111,114,32,91,91,99,111,108,111,114,40,48,41,93,93,59,10,125,59,10,10,115,116,114,117,99,116,32,109,97,105,110,48,95,105,110,10,123,10,32,32,32,32,102,108,111,97,116,52,32,
-    73,110,95,67,111,108,111,114,32,91,91,117,115,101,114,40,108,111,99,110,48,41,93,93,59,10,32,32,32,32,102,108,111,97,116,50,32,73,110,95,85,86,32,91,91,117,115,101,114,40,108,111,99,
-    110,49,41,93,93,59,10,125,59,10,10,102,114,97,103,109,101,110,116,32,109,97,105,110,48,95,111,117,116,32,109,97,105,110,48,40,109,97,105,110,48,95,105,110,32,105,110,32,91,91,115,116,
-    97,103,101,95,105,110,93,93,44,32,116,101,120,116,117,114,101,50,100,60,102,108,111,97,116,62,32,115,84,101,120,116,117,114,101,32,91,91,116,101,120,116,117,114,101,40,48,41,93,93,
-    44,32,115,97,109,112,108,101,114,32,115,84,101,120,116,117,114,101,83,109,112,108,114,32,91,91,115,97,109,112,108,101,114,40,48,41,93,93,41,10,123,10,32,32,32,32,109,97,105,110,48,
-    95,111,117,116,32,111,117,116,32,61,32,123,125,59,10,32,32,32,32,95,49,49,32,73,110,32,61,32,123,125,59,10,32,32,32,32,73,110,46,67,111,108,111,114,32,61,32,105,110,46,73,110,95,67,
-    111,108,111,114,59,10,32,32,32,32,73,110,46,85,86,32,61,32,105,110,46,73,110,95,85,86,59,10,32,32,32,32,111,117,116,46,102,67,111,108,111,114,32,61,32,73,110,46,67,111,108,111,114,
-    32,42,32,115,84,101,120,116,117,114,101,46,115,97,109,112,108,101,40,115,84,101,120,116,117,114,101,83,109,112,108,114,44,32,73,110,46,85,86,41,59,10,32,32,32,32,114,101,116,117,114,
-    110,32,111,117,116,59,10,125,10,10,
-};
 #elif TARGET_OS_IPHONE
 const uint8_t metallib_vertex[3876]  = {
     77,84,76,66,1,0,2,0,7,0,0,130,18,0,1,0,36,15,0,0,0,0,0,0,88,0,0,0,0,0,0,0,123,0,0,0,0,0,0,0,219,0,0,0,0,0,0,0,49,0,0,0,0,0,0,0,12,1,0,0,0,0,0,0,8,0,0,0,0,0,0,0,20,1,0,0,0,0,0,0,16,

backends/imgui_impl_sdlrenderer2.cpp

@@ -1,23 +1,20 @@
 // dear imgui: Renderer Backend for SDL_Renderer for SDL2
 // (Requires: SDL 2.0.17+)
 
-// Note that SDL_Renderer is an _optional_ component of SDL2, which IMHO is now largely obsolete.
-// For a multi-platform app consider using other technologies:
-// - SDL3+SDL_GPU: SDL_GPU is SDL3 new graphics abstraction API. You will need to update to SDL3.
-// - SDL2+DirectX, SDL2+OpenGL, SDL2+Vulkan: combine SDL with dedicated renderers.
-// If your application wants to render any non trivial amount of graphics other than UI,
-// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user
-// and it might be difficult to step out of those boundaries.
+// Note how SDL_Renderer is an _optional_ component of SDL2.
+// For a multi-platform app consider using e.g. SDL+DirectX on Windows and SDL+OpenGL on Linux/OSX.
+// If your application will want to render any non trivial amount of graphics other than UI,
+// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user and
+// it might be difficult to step out of those boundaries.
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
-// Missing features or Issues:
-//  [ ] Renderer: Missing support for DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest callbacks: SDLRenderer2 does not support changing SDL_SCALE_MODE while rendering.
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
-// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
+// You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
 // Learn about Dear ImGui:
 // - FAQ                  https://dearimgui.com/faq
@@ -26,12 +23,6 @@
 // - Introduction, links and more at the top of imgui.cpp
 
 // CHANGELOG
-// (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState (others cannot be supported). (#9378)
-//  2026-03-12: Fixed invalid assert in ImGui_ImplSDLRenderer2_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-06-11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplSDLRenderer2_CreateFontsTexture() and ImGui_ImplSDLRenderer2_DestroyFontsTexture().
-//  2025-01-18: Use endian-dependent RGBA32 texture format, to match SDL_Color.
 //  2024-10-09: Expose selected render state in ImGui_ImplSDLRenderer2_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
 //  2024-05-14: *BREAKING CHANGE* ImGui_ImplSDLRenderer3_RenderDrawData() requires SDL_Renderer* passed as parameter.
 //  2023-05-30: Renamed imgui_impl_sdlrenderer.h/.cpp to imgui_impl_sdlrenderer2.h/.cpp to accommodate for upcoming SDL3.
@@ -50,8 +41,6 @@
 #if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wsign-conversion"    // warning: implicit conversion changes signedness
-#elif defined(__GNUC__)
-#pragma GCC diagnostic ignored "-Wfloat-equal"                      // warning: comparing floating-point with '==' or '!=' is unsafe
 #endif
 
 // SDL
@@ -64,7 +53,7 @@
 struct ImGui_ImplSDLRenderer2_Data
 {
     SDL_Renderer*   Renderer;       // Main viewport's renderer
-
+    SDL_Texture*    FontTexture;
     ImGui_ImplSDLRenderer2_Data()   { memset((void*)this, 0, sizeof(*this)); }
 };
 
@@ -76,48 +65,72 @@ static ImGui_ImplSDLRenderer2_Data* ImGui_ImplSDLRenderer2_GetBackendData()
 }
 
 // Functions
+bool ImGui_ImplSDLRenderer2_Init(SDL_Renderer* renderer)
+{
+    ImGuiIO& io = ImGui::GetIO();
+    IMGUI_CHECKVERSION();
+    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
+    IM_ASSERT(renderer != nullptr && "SDL_Renderer not initialized!");
+
+    // Setup backend capabilities flags
+    ImGui_ImplSDLRenderer2_Data* bd = IM_NEW(ImGui_ImplSDLRenderer2_Data)();
+    io.BackendRendererUserData = (void*)bd;
+    io.BackendRendererName = "imgui_impl_sdlrenderer2";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+
+    bd->Renderer = renderer;
+
+    return true;
+}
+
+void ImGui_ImplSDLRenderer2_Shutdown()
+{
+    ImGui_ImplSDLRenderer2_Data* bd = ImGui_ImplSDLRenderer2_GetBackendData();
+    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
+    ImGuiIO& io = ImGui::GetIO();
+
+    ImGui_ImplSDLRenderer2_DestroyDeviceObjects();
+
+    io.BackendRendererName = nullptr;
+    io.BackendRendererUserData = nullptr;
+    io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset;
+    IM_DELETE(bd);
+}
+
 static void ImGui_ImplSDLRenderer2_SetupRenderState(SDL_Renderer* renderer)
 {
-    // Clear out any viewports and cliprect set by the user
+	// Clear out any viewports and cliprect set by the user
     // FIXME: Technically speaking there are lots of other things we could backup/setup/restore during our render process.
-    SDL_RenderSetViewport(renderer, nullptr);
-    SDL_RenderSetClipRect(renderer, nullptr);
+	SDL_RenderSetViewport(renderer, nullptr);
+	SDL_RenderSetClipRect(renderer, nullptr);
 }
 
 void ImGui_ImplSDLRenderer2_NewFrame()
 {
     ImGui_ImplSDLRenderer2_Data* bd = ImGui_ImplSDLRenderer2_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplSDLRenderer2_Init()?");
-    IM_UNUSED(bd);
-}
 
-// Draw callbacks
-static void ImGui_ImplSDLRenderer2_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*) {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
+    if (!bd->FontTexture)
+        ImGui_ImplSDLRenderer2_CreateDeviceObjects();
+}
 
 void ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer* renderer)
 {
-    // If there's a scale factor set by the user, use that instead
+	// If there's a scale factor set by the user, use that instead
     // If the user has specified a scale factor to SDL_Renderer already via SDL_RenderSetScale(), SDL will scale whatever we pass
     // to SDL_RenderGeometryRaw() by that scale factor. In that case we don't want to be also scaling it ourselves here.
     float rsx = 1.0f;
-    float rsy = 1.0f;
-    SDL_RenderGetScale(renderer, &rsx, &rsy);
+	float rsy = 1.0f;
+	SDL_RenderGetScale(renderer, &rsx, &rsy);
     ImVec2 render_scale;
-    render_scale.x = (rsx == 1.0f) ? draw_data->FramebufferScale.x : 1.0f;
-    render_scale.y = (rsy == 1.0f) ? draw_data->FramebufferScale.y : 1.0f;
+	render_scale.x = (rsx == 1.0f) ? draw_data->FramebufferScale.x : 1.0f;
+	render_scale.y = (rsy == 1.0f) ? draw_data->FramebufferScale.y : 1.0f;
 
-    // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
-    int fb_width = (int)(draw_data->DisplaySize.x * render_scale.x);
-    int fb_height = (int)(draw_data->DisplaySize.y * render_scale.y);
-    if (fb_width == 0 || fb_height == 0)
-        return;
-
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplSDLRenderer2_UpdateTexture(tex);
+	// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
+	int fb_width = (int)(draw_data->DisplaySize.x * render_scale.x);
+	int fb_height = (int)(draw_data->DisplaySize.y * render_scale.y);
+	if (fb_width == 0 || fb_height == 0)
+		return;
 
     // Backup SDL_Renderer state that will be modified to restore it afterwards
     struct BackupSDLRendererState
@@ -140,13 +153,14 @@ void ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
     render_state.Renderer = renderer;
     platform_io.Renderer_RenderState = &render_state;
 
-    // Will project scissor/clipping rectangles into framebuffer space
-    ImVec2 clip_off = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
-    ImVec2 clip_scale = render_scale;
+	// Will project scissor/clipping rectangles into framebuffer space
+	ImVec2 clip_off = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
+	ImVec2 clip_scale = render_scale;
 
     // Render command lists
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         const ImDrawVert* vtx_buffer = draw_list->VtxBuffer.Data;
         const ImDrawIdx* idx_buffer = draw_list->IdxBuffer.Data;
 
@@ -156,7 +170,8 @@ void ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
             if (pcmd->UserCallback)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplSDLRenderer2_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplSDLRenderer2_SetupRenderState(renderer);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -185,7 +200,7 @@ void ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
 #endif
 
                 // Bind texture, Draw
-                SDL_Texture* tex = (SDL_Texture*)pcmd->GetTexID();
+				SDL_Texture* tex = (SDL_Texture*)pcmd->GetTexID();
                 SDL_RenderGeometryRaw(renderer, tex,
                     xy, (int)sizeof(ImDrawVert),
                     color, (int)sizeof(ImDrawVert),
@@ -202,104 +217,55 @@ void ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
     SDL_RenderSetClipRect(renderer, old.ClipEnabled ? &old.ClipRect : nullptr);
 }
 
-void ImGui_ImplSDLRenderer2_UpdateTexture(ImTextureData* tex)
-{
-    ImGui_ImplSDLRenderer2_Data* bd = ImGui_ImplSDLRenderer2_GetBackendData();
-
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-
-        // Create texture
-        // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
-        SDL_Texture* sdl_texture = SDL_CreateTexture(bd->Renderer, SDL_PIXELFORMAT_RGBA32, SDL_TEXTUREACCESS_STATIC, tex->Width, tex->Height);
-        IM_ASSERT(sdl_texture != nullptr && "Backend failed to create texture!");
-        SDL_UpdateTexture(sdl_texture, nullptr, tex->GetPixels(), tex->GetPitch());
-        SDL_SetTextureBlendMode(sdl_texture, SDL_BLENDMODE_BLEND);
-        SDL_SetTextureScaleMode(sdl_texture, SDL_ScaleModeLinear);
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)sdl_texture);
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        SDL_Texture* sdl_texture = (SDL_Texture*)(intptr_t)tex->TexID;
-        for (ImTextureRect& r : tex->Updates)
-        {
-            SDL_Rect sdl_r = { r.x, r.y, r.w, r.h };
-            SDL_UpdateTexture(sdl_texture, &sdl_r, tex->GetPixelsAt(r.x, r.y), tex->GetPitch());
-        }
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantDestroy)
-    {
-        if (tex->TexID != ImTextureID_Invalid)
-            if (SDL_Texture* sdl_texture = (SDL_Texture*)(intptr_t)tex->TexID)
-                SDL_DestroyTexture(sdl_texture);
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->SetStatus(ImTextureStatus_Destroyed);
-    }
-}
-
-void ImGui_ImplSDLRenderer2_CreateDeviceObjects()
-{
-}
-
-void ImGui_ImplSDLRenderer2_DestroyDeviceObjects()
-{
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-        {
-            tex->SetStatus(ImTextureStatus_WantDestroy);
-            ImGui_ImplSDLRenderer2_UpdateTexture(tex);
-        }
-}
-
-bool ImGui_ImplSDLRenderer2_Init(SDL_Renderer* renderer)
+// Called by Init/NewFrame/Shutdown
+bool ImGui_ImplSDLRenderer2_CreateFontsTexture()
 {
     ImGuiIO& io = ImGui::GetIO();
-    IMGUI_CHECKVERSION();
-    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
-    IM_ASSERT(renderer != nullptr && "SDL_Renderer not initialized!");
+    ImGui_ImplSDLRenderer2_Data* bd = ImGui_ImplSDLRenderer2_GetBackendData();
 
-    // Setup backend capabilities flags
-    ImGui_ImplSDLRenderer2_Data* bd = IM_NEW(ImGui_ImplSDLRenderer2_Data)();
-    io.BackendRendererUserData = (void*)bd;
-    io.BackendRendererName = "imgui_impl_sdlrenderer2";
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
+    // Build texture atlas
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);   // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
 
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplSDLRenderer2_DrawCallback_ResetRenderState;
+    // Upload texture to graphics system
+    // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+    bd->FontTexture = SDL_CreateTexture(bd->Renderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STATIC, width, height);
+    if (bd->FontTexture == nullptr)
+    {
+        SDL_Log("error creating texture");
+        return false;
+    }
+    SDL_UpdateTexture(bd->FontTexture, nullptr, pixels, 4 * width);
+    SDL_SetTextureBlendMode(bd->FontTexture, SDL_BLENDMODE_BLEND);
+    SDL_SetTextureScaleMode(bd->FontTexture, SDL_ScaleModeLinear);
 
-    bd->Renderer = renderer;
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
 
     return true;
 }
 
-void ImGui_ImplSDLRenderer2_Shutdown()
+void ImGui_ImplSDLRenderer2_DestroyFontsTexture()
 {
-    ImGui_ImplSDLRenderer2_Data* bd = ImGui_ImplSDLRenderer2_GetBackendData();
-    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    ImGui_ImplSDLRenderer2_Data* bd = ImGui_ImplSDLRenderer2_GetBackendData();
+    if (bd->FontTexture)
+    {
+        io.Fonts->SetTexID(0);
+        SDL_DestroyTexture(bd->FontTexture);
+        bd->FontTexture = nullptr;
+    }
+}
 
-    ImGui_ImplSDLRenderer2_DestroyDeviceObjects();
+bool ImGui_ImplSDLRenderer2_CreateDeviceObjects()
+{
+    return ImGui_ImplSDLRenderer2_CreateFontsTexture();
+}
 
-    io.BackendRendererName = nullptr;
-    io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
-    IM_DELETE(bd);
+void ImGui_ImplSDLRenderer2_DestroyDeviceObjects()
+{
+    ImGui_ImplSDLRenderer2_DestroyFontsTexture();
 }
 
 //-----------------------------------------------------------------------------

backends/imgui_impl_sdlrenderer2.h

@@ -1,21 +1,18 @@
 // dear imgui: Renderer Backend for SDL_Renderer for SDL2
 // (Requires: SDL 2.0.17+)
 
-// Note that SDL_Renderer is an _optional_ component of SDL2, which IMHO is now largely obsolete.
-// For a multi-platform app consider using other technologies:
-// - SDL3+SDL_GPU: SDL_GPU is SDL3 new graphics abstraction API. You will need to update to SDL3.
-// - SDL2+DirectX, SDL2+OpenGL, SDL2+Vulkan: combine SDL with dedicated renderers.
-// If your application wants to render any non trivial amount of graphics other than UI,
-// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user
-// and it might be difficult to step out of those boundaries.
+// Note how SDL_Renderer is an _optional_ component of SDL2.
+// For a multi-platform app consider using e.g. SDL+DirectX on Windows and SDL+OpenGL on Linux/OSX.
+// If your application will want to render any non trivial amount of graphics other than UI,
+// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user and
+// it might be difficult to step out of those boundaries.
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
-// Missing features or Issues:
-//  [ ] Renderer: Missing support for DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest callbacks: SDLRenderer2 does not support changing SDL_SCALE_MODE while rendering.
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -38,12 +35,11 @@ IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_NewFrame();
 IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer* renderer);
 
 // Called by Init/NewFrame/Shutdown
-IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_CreateDeviceObjects();
+IMGUI_IMPL_API bool     ImGui_ImplSDLRenderer2_CreateFontsTexture();
+IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_DestroyFontsTexture();
+IMGUI_IMPL_API bool     ImGui_ImplSDLRenderer2_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_DestroyDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplSDLRenderer2_UpdateTexture(ImTextureData* tex);
-
 // [BETA] Selected render state data shared with callbacks.
 // This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplSDLRenderer2_RenderDrawData() call.
 // (Please open an issue if you feel you need access to more data)

backends/imgui_impl_sdlrenderer3.cpp

@@ -1,21 +1,22 @@
 // dear imgui: Renderer Backend for SDL_Renderer for SDL3
-// (Requires: SDL 3.1.8+)
+// (Requires: SDL 3.0.0+)
 
-// Note that SDL_Renderer is an _optional_ component of SDL3, which IMHO is now largely obsolete.
-// For a multi-platform app consider using other technologies:
-// - SDL3+SDL_GPU: SDL_GPU is SDL3 new graphics abstraction API.
-// - SDL3+DirectX, SDL3+OpenGL, SDL3+Vulkan: combine SDL with dedicated renderers.
-// If your application wants to render any non trivial amount of graphics other than UI,
-// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user
-// and it might be difficult to step out of those boundaries.
+// (**IMPORTANT: SDL 3.0.0 is NOT YET RELEASED AND CURRENTLY HAS A FAST CHANGING API. THIS CODE BREAKS OFTEN AS SDL3 CHANGES.**)
+
+// Note how SDL_Renderer is an _optional_ component of SDL3.
+// For a multi-platform app consider using e.g. SDL+DirectX on Windows and SDL+OpenGL on Linux/OSX.
+// If your application will want to render any non trivial amount of graphics other than UI,
+// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user and
+// it might be difficult to step out of those boundaries.
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
-// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
+// You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
 // Learn about Dear ImGui:
 // - FAQ                  https://dearimgui.com/faq
@@ -24,12 +25,6 @@
 // - Introduction, links and more at the top of imgui.cpp
 
 // CHANGELOG
-// (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
-//  2026-03-12: Fixed invalid assert in ImGui_ImplSDLRenderer3_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-06-11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplSDLRenderer3_CreateFontsTexture() and ImGui_ImplSDLRenderer3_DestroyFontsTexture().
-//  2025-01-18: Use endian-dependent RGBA32 texture format, to match SDL_Color.
 //  2024-10-09: Expose selected render state in ImGui_ImplSDLRenderer3_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
 //  2024-07-01: Update for SDL3 api changes: SDL_RenderGeometryRaw() uint32 version was removed (SDL#9009).
 //  2024-05-14: *BREAKING CHANGE* ImGui_ImplSDLRenderer3_RenderDrawData() requires SDL_Renderer* passed as parameter.
@@ -45,8 +40,6 @@
 #if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wsign-conversion"    // warning: implicit conversion changes signedness
-#elif defined(__GNUC__)
-#pragma GCC diagnostic ignored "-Wfloat-equal"          // warning: comparing floating-point with '==' or '!=' is unsafe
 #endif
 
 // SDL
@@ -59,11 +52,9 @@
 struct ImGui_ImplSDLRenderer3_Data
 {
     SDL_Renderer*           Renderer;       // Main viewport's renderer
+    SDL_Texture*            FontTexture;
     ImVector<SDL_FColor>    ColorBuffer;
 
-    // Render State
-    SDL_ScaleMode           CurrentScaleMode;
-
     ImGui_ImplSDLRenderer3_Data()   { memset((void*)this, 0, sizeof(*this)); }
 };
 
@@ -75,19 +66,53 @@ static ImGui_ImplSDLRenderer3_Data* ImGui_ImplSDLRenderer3_GetBackendData()
 }
 
 // Functions
+bool ImGui_ImplSDLRenderer3_Init(SDL_Renderer* renderer)
+{
+    ImGuiIO& io = ImGui::GetIO();
+    IMGUI_CHECKVERSION();
+    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
+    IM_ASSERT(renderer != nullptr && "SDL_Renderer not initialized!");
+
+    // Setup backend capabilities flags
+    ImGui_ImplSDLRenderer3_Data* bd = IM_NEW(ImGui_ImplSDLRenderer3_Data)();
+    io.BackendRendererUserData = (void*)bd;
+    io.BackendRendererName = "imgui_impl_sdlrenderer3";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+
+    bd->Renderer = renderer;
+
+    return true;
+}
+
+void ImGui_ImplSDLRenderer3_Shutdown()
+{
+    ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
+    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
+    ImGuiIO& io = ImGui::GetIO();
+
+    ImGui_ImplSDLRenderer3_DestroyDeviceObjects();
+
+    io.BackendRendererName = nullptr;
+    io.BackendRendererUserData = nullptr;
+    io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset;
+    IM_DELETE(bd);
+}
+
 static void ImGui_ImplSDLRenderer3_SetupRenderState(SDL_Renderer* renderer)
 {
-    // Clear out any viewports and cliprect set by the user
+	// Clear out any viewports and cliprect set by the user
     // FIXME: Technically speaking there are lots of other things we could backup/setup/restore during our render process.
-    SDL_SetRenderViewport(renderer, nullptr);
-    SDL_SetRenderClipRect(renderer, nullptr);
+	SDL_SetRenderViewport(renderer, nullptr);
+	SDL_SetRenderClipRect(renderer, nullptr);
 }
 
 void ImGui_ImplSDLRenderer3_NewFrame()
 {
     ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplSDLRenderer3_Init()?");
-    IM_UNUSED(bd);
+
+    if (!bd->FontTexture)
+        ImGui_ImplSDLRenderer3_CreateDeviceObjects();
 }
 
 // https://github.com/libsdl-org/SDL/issues/9009
@@ -108,37 +133,25 @@ static int SDL_RenderGeometryRaw8BitColor(SDL_Renderer* renderer, ImVector<SDL_F
     return SDL_RenderGeometryRaw(renderer, texture, xy, xy_stride, color3, sizeof(*color3), uv, uv_stride, num_vertices, indices, num_indices, size_indices);
 }
 
-// Draw callbacks
-static void ImGui_ImplSDLRenderer3_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)   {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplSDLRenderer3_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)   { ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData(); bd->CurrentScaleMode = SDL_SCALEMODE_LINEAR; }
-static void ImGui_ImplSDLRenderer3_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)  { ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData(); bd->CurrentScaleMode = SDL_SCALEMODE_NEAREST; }
-
 void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer* renderer)
 {
     ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
 
-    // If there's a scale factor set by the user, use that instead
+	// If there's a scale factor set by the user, use that instead
     // If the user has specified a scale factor to SDL_Renderer already via SDL_RenderSetScale(), SDL will scale whatever we pass
     // to SDL_RenderGeometryRaw() by that scale factor. In that case we don't want to be also scaling it ourselves here.
     float rsx = 1.0f;
-    float rsy = 1.0f;
-    SDL_GetRenderScale(renderer, &rsx, &rsy);
+	float rsy = 1.0f;
+	SDL_GetRenderScale(renderer, &rsx, &rsy);
     ImVec2 render_scale;
-    render_scale.x = (rsx == 1.0f) ? draw_data->FramebufferScale.x : 1.0f;
-    render_scale.y = (rsy == 1.0f) ? draw_data->FramebufferScale.y : 1.0f;
+	render_scale.x = (rsx == 1.0f) ? draw_data->FramebufferScale.x : 1.0f;
+	render_scale.y = (rsy == 1.0f) ? draw_data->FramebufferScale.y : 1.0f;
 
-    // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
-    int fb_width = (int)(draw_data->DisplaySize.x * render_scale.x);
-    int fb_height = (int)(draw_data->DisplaySize.y * render_scale.y);
-    if (fb_width == 0 || fb_height == 0)
-        return;
-
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplSDLRenderer3_UpdateTexture(tex);
+	// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
+	int fb_width = (int)(draw_data->DisplaySize.x * render_scale.x);
+	int fb_height = (int)(draw_data->DisplaySize.y * render_scale.y);
+	if (fb_width == 0 || fb_height == 0)
+		return;
 
     // Backup SDL_Renderer state that will be modified to restore it afterwards
     struct BackupSDLRendererState
@@ -163,13 +176,14 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
     render_state.Renderer = renderer;
     platform_io.Renderer_RenderState = &render_state;
 
-    // Will project scissor/clipping rectangles into framebuffer space
-    ImVec2 clip_off = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
-    ImVec2 clip_scale = render_scale;
+	// Will project scissor/clipping rectangles into framebuffer space
+	ImVec2 clip_off = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
+	ImVec2 clip_scale = render_scale;
 
     // Render command lists
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         const ImDrawVert* vtx_buffer = draw_list->VtxBuffer.Data;
         const ImDrawIdx* idx_buffer = draw_list->IdxBuffer.Data;
 
@@ -179,7 +193,8 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
             if (pcmd->UserCallback)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplSDLRenderer3_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplSDLRenderer3_SetupRenderState(renderer);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -204,8 +219,7 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
                 const SDL_Color* color = (const SDL_Color*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, col)); // SDL 2.0.19+
 
                 // Bind texture, Draw
-                SDL_Texture* tex = (SDL_Texture*)pcmd->GetTexID();
-                SDL_SetTextureScaleMode(tex, bd->CurrentScaleMode);
+				SDL_Texture* tex = (SDL_Texture*)pcmd->GetTexID();
                 SDL_RenderGeometryRaw8BitColor(renderer, bd->ColorBuffer, tex,
                     xy, (int)sizeof(ImDrawVert),
                     color, (int)sizeof(ImDrawVert),
@@ -222,106 +236,55 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
     SDL_SetRenderClipRect(renderer, old.ClipEnabled ? &old.ClipRect : nullptr);
 }
 
-void ImGui_ImplSDLRenderer3_UpdateTexture(ImTextureData* tex)
-{
-    ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
-
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-
-        // Create texture
-        // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
-        SDL_Texture* sdl_texture = SDL_CreateTexture(bd->Renderer, SDL_PIXELFORMAT_RGBA32, SDL_TEXTUREACCESS_STATIC, tex->Width, tex->Height);
-        IM_ASSERT(sdl_texture != nullptr && "Backend failed to create texture!");
-        SDL_UpdateTexture(sdl_texture, nullptr, tex->GetPixels(), tex->GetPitch());
-        SDL_SetTextureBlendMode(sdl_texture, SDL_BLENDMODE_BLEND);
-        SDL_SetTextureScaleMode(sdl_texture, SDL_SCALEMODE_LINEAR);
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)sdl_texture);
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Update selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
-        SDL_Texture* sdl_texture = (SDL_Texture*)(intptr_t)tex->TexID;
-        for (ImTextureRect& r : tex->Updates)
-        {
-            SDL_Rect sdl_r = { r.x, r.y, r.w, r.h };
-            SDL_UpdateTexture(sdl_texture, &sdl_r, tex->GetPixelsAt(r.x, r.y), tex->GetPitch());
-        }
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    else if (tex->Status == ImTextureStatus_WantDestroy)
-    {
-        if (tex->TexID != ImTextureID_Invalid)
-            if (SDL_Texture* sdl_texture = (SDL_Texture*)(intptr_t)tex->TexID)
-                SDL_DestroyTexture(sdl_texture);
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->SetStatus(ImTextureStatus_Destroyed);
-    }
-}
-
-void ImGui_ImplSDLRenderer3_CreateDeviceObjects()
-{
-}
-
-void ImGui_ImplSDLRenderer3_DestroyDeviceObjects()
-{
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-        {
-            tex->SetStatus(ImTextureStatus_WantDestroy);
-            ImGui_ImplSDLRenderer3_UpdateTexture(tex);
-        }
-}
-
-bool ImGui_ImplSDLRenderer3_Init(SDL_Renderer* renderer)
+// Called by Init/NewFrame/Shutdown
+bool ImGui_ImplSDLRenderer3_CreateFontsTexture()
 {
     ImGuiIO& io = ImGui::GetIO();
-    IMGUI_CHECKVERSION();
-    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
-    IM_ASSERT(renderer != nullptr && "SDL_Renderer not initialized!");
+    ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
 
-    // Setup backend capabilities flags
-    ImGui_ImplSDLRenderer3_Data* bd = IM_NEW(ImGui_ImplSDLRenderer3_Data)();
-    io.BackendRendererUserData = (void*)bd;
-    io.BackendRendererName = "imgui_impl_sdlrenderer3";
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
+    // Build texture atlas
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);   // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
 
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplSDLRenderer3_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplSDLRenderer3_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplSDLRenderer3_DrawCallback_SetSamplerNearest;
+    // Upload texture to graphics system
+    // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+    bd->FontTexture = SDL_CreateTexture(bd->Renderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STATIC, width, height);
+    if (bd->FontTexture == nullptr)
+    {
+        SDL_Log("error creating texture");
+        return false;
+    }
+    SDL_UpdateTexture(bd->FontTexture, nullptr, pixels, 4 * width);
+    SDL_SetTextureBlendMode(bd->FontTexture, SDL_BLENDMODE_BLEND);
+    SDL_SetTextureScaleMode(bd->FontTexture, SDL_SCALEMODE_LINEAR);
 
-    bd->Renderer = renderer;
+    // Store our identifier
+    io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
 
     return true;
 }
 
-void ImGui_ImplSDLRenderer3_Shutdown()
+void ImGui_ImplSDLRenderer3_DestroyFontsTexture()
 {
-    ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
-    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData();
+    if (bd->FontTexture)
+    {
+        io.Fonts->SetTexID(0);
+        SDL_DestroyTexture(bd->FontTexture);
+        bd->FontTexture = nullptr;
+    }
+}
 
-    ImGui_ImplSDLRenderer3_DestroyDeviceObjects();
+bool ImGui_ImplSDLRenderer3_CreateDeviceObjects()
+{
+    return ImGui_ImplSDLRenderer3_CreateFontsTexture();
+}
 
-    io.BackendRendererName = nullptr;
-    io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
-    IM_DELETE(bd);
+void ImGui_ImplSDLRenderer3_DestroyDeviceObjects()
+{
+    ImGui_ImplSDLRenderer3_DestroyFontsTexture();
 }
 
 //-----------------------------------------------------------------------------

backends/imgui_impl_sdlrenderer3.h

@@ -1,21 +1,22 @@
 // dear imgui: Renderer Backend for SDL_Renderer for SDL3
-// (Requires: SDL 3.1.8+)
+// (Requires: SDL 3.0.0+)
 
-// Note that SDL_Renderer is an _optional_ component of SDL3, which IMHO is now largely obsolete.
-// For a multi-platform app consider using other technologies:
-// - SDL3+SDL_GPU: SDL_GPU is SDL3 new graphics abstraction API.
-// - SDL3+DirectX, SDL3+OpenGL, SDL3+Vulkan: combine SDL with dedicated renderers.
-// If your application wants to render any non trivial amount of graphics other than UI,
-// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user
-// and it might be difficult to step out of those boundaries.
+// (**IMPORTANT: SDL 3.0.0 is NOT YET RELEASED AND CURRENTLY HAS A FAST CHANGING API. THIS CODE BREAKS OFTEN AS SDL3 CHANGES.**)
+
+// Note how SDL_Renderer is an _optional_ component of SDL3.
+// For a multi-platform app consider using e.g. SDL+DirectX on Windows and SDL+OpenGL on Linux/OSX.
+// If your application will want to render any non trivial amount of graphics other than UI,
+// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user and
+// it might be difficult to step out of those boundaries.
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'SDL_Texture*' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows).
 
-// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
+// You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
 // Learn about Dear ImGui:
 // - FAQ                  https://dearimgui.com/faq
@@ -36,12 +37,11 @@ IMGUI_IMPL_API void     ImGui_ImplSDLRenderer3_NewFrame();
 IMGUI_IMPL_API void     ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer* renderer);
 
 // Called by Init/NewFrame/Shutdown
-IMGUI_IMPL_API void     ImGui_ImplSDLRenderer3_CreateDeviceObjects();
+IMGUI_IMPL_API bool     ImGui_ImplSDLRenderer3_CreateFontsTexture();
+IMGUI_IMPL_API void     ImGui_ImplSDLRenderer3_DestroyFontsTexture();
+IMGUI_IMPL_API bool     ImGui_ImplSDLRenderer3_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplSDLRenderer3_DestroyDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void     ImGui_ImplSDLRenderer3_UpdateTexture(ImTextureData* tex);
-
 // [BETA] Selected render state data shared with callbacks.
 // This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplSDLRenderer3_RenderDrawData() call.
 // (Please open an issue if you feel you need access to more data)

backends/imgui_impl_vulkan.h

@@ -2,10 +2,10 @@
 // This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
 
 // Implemented features:
-//  [!] Renderer: User texture binding. Use a VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE 'VkDescriptorSet' as texture identifier. Call ImGui_ImplVulkan_AddTexture() to register one. Read the FAQ about ImTextureID/ImTextureRef + https://github.com/ocornut/imgui/pull/914 for discussions.
+//  [!] Renderer: User texture binding. Use 'VkDescriptorSet' as ImTextureID. Call ImGui_ImplVulkan_AddTexture() to register one. Read the FAQ about ImTextureID! See https://github.com/ocornut/imgui/pull/914 for discussions.
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
-//  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
+//  [x] Renderer: Multi-viewport / platform windows. With issues (flickering when creating a new viewport).
 
 // The aim of imgui_impl_vulkan.h/.cpp is to be usable in your engine without any modification.
 // IF YOU FEEL YOU NEED TO MAKE ANY CHANGE TO THIS CODE, please share them and your feedback at https://github.com/ocornut/imgui/
@@ -41,20 +41,9 @@
 // If you have no idea what this is, leave it alone!
 //#define IMGUI_IMPL_VULKAN_NO_PROTOTYPES
 
-// [Configuration] Convenience support for Volk
+// Convenience support for Volk
 // (you can also technically use IMGUI_IMPL_VULKAN_NO_PROTOTYPES + wrap Volk via ImGui_ImplVulkan_LoadFunctions().)
-// (When using Volk from directory outside your include directories list you can specify full path to the volk.h header,
-//  for example when using Volk from VulkanSDK and using include_directories(${Vulkan_INCLUDE_DIRS})' from 'find_package(Vulkan REQUIRED)')
 //#define IMGUI_IMPL_VULKAN_USE_VOLK
-//#define IMGUI_IMPL_VULKAN_VOLK_FILENAME    <Volk/volk.h>
-//#define IMGUI_IMPL_VULKAN_VOLK_FILENAME    <volk.h>       // Default
-// Reminder: make those changes in your imconfig.h file, not here!
-
-// Clang/GCC warnings with -Weverything
-#if defined(__clang__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wold-style-cast" // warning: use of old-style cast
-#endif
 
 #if defined(IMGUI_IMPL_VULKAN_NO_PROTOTYPES) && !defined(VK_NO_PROTOTYPES)
 #define VK_NO_PROTOTYPES
@@ -65,11 +54,7 @@
 
 // Vulkan includes
 #ifdef IMGUI_IMPL_VULKAN_USE_VOLK
-#ifdef IMGUI_IMPL_VULKAN_VOLK_FILENAME
-#include IMGUI_IMPL_VULKAN_VOLK_FILENAME
-#else
 #include <volk.h>
-#endif
 #else
 #include <vulkan/vulkan.h>
 #endif
@@ -77,21 +62,9 @@
 #define IMGUI_IMPL_VULKAN_HAS_DYNAMIC_RENDERING
 #endif
 
-// Backend uses a small number of descriptors per font atlas + as many as additional calls done to ImGui_ImplVulkan_AddTexture().
-#define IMGUI_IMPL_VULKAN_MINIMUM_SAMPLED_IMAGE_POOL_SIZE   (8)     // Minimum per atlas
-#define IMGUI_IMPL_VULKAN_MINIMUM_SAMPLER_POOL_SIZE         (2)     // Minimum for linear + nearest
-
-// Specify settings to create pipeline and swapchain
-struct ImGui_ImplVulkan_PipelineInfo
-{
-    VkRenderPass                    RenderPass;                     // Ignored if using dynamic rendering
-    uint32_t                        Subpass;                        //
-    VkSampleCountFlagBits           MSAASamples = {};               // 0 defaults to VK_SAMPLE_COUNT_1_BIT
-    ImVector<VkDynamicState>        ExtraDynamicStates;             // Optional, allows to insert more dynamic states into our VkPipeline
-#ifdef IMGUI_IMPL_VULKAN_HAS_DYNAMIC_RENDERING
-    VkPipelineRenderingCreateInfoKHR PipelineRenderingCreateInfo;   // Optional, valid if .sType == VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR
-#endif
-};
+// Current version of the backend use 1 descriptor for the font atlas + as many as additional calls done to ImGui_ImplVulkan_AddTexture().
+// It is expected that as early as Q1 2025 the backend will use a few more descriptors. Use this value + number of desired calls to ImGui_ImplVulkan_AddTexture().
+#define IMGUI_IMPL_VULKAN_MINIMUM_IMAGE_SAMPLER_POOL_SIZE   (1)     // Minimum per atlas
 
 // Initialization data, for ImGui_ImplVulkan_Init()
 // [Please zero-clear before use!]
@@ -100,42 +73,38 @@ struct ImGui_ImplVulkan_PipelineInfo
 //     and must contain a pool size large enough to hold a small number of VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER descriptors.
 //   - As an convenience, by setting DescriptorPoolSize > 0 the backend will create one for you.
 // - About dynamic rendering:
-//   - When using dynamic rendering, set UseDynamicRendering=true + fill PipelineInfoMain.PipelineRenderingCreateInfo structure.
+//   - When using dynamic rendering, set UseDynamicRendering=true and fill PipelineRenderingCreateInfo structure.
 struct ImGui_ImplVulkan_InitInfo
 {
-    uint32_t                        ApiVersion;                 // Fill with API version of Instance, e.g. VK_API_VERSION_1_3 or your value of VkApplicationInfo::apiVersion. May be lower than header version (VK_HEADER_VERSION_COMPLETE)
     VkInstance                      Instance;
     VkPhysicalDevice                PhysicalDevice;
     VkDevice                        Device;
     uint32_t                        QueueFamily;
     VkQueue                         Queue;
-    VkDescriptorPool                DescriptorPool;             // See requirements in note above; ignored if using DescriptorPoolSize > 0
-    uint32_t                        DescriptorPoolSize;         // Optional: set to create internal ImageView descriptor pool automatically instead of using DescriptorPool.
-    uint32_t                        MinImageCount;              // >= 2
-    uint32_t                        ImageCount;                 // >= MinImageCount
-    VkPipelineCache                 PipelineCache;              // Optional
+    VkDescriptorPool                DescriptorPool;               // See requirements in note above; ignored if using DescriptorPoolSize > 0
+    VkRenderPass                    RenderPass;                   // Ignored if using dynamic rendering
+    uint32_t                        MinImageCount;                // >= 2
+    uint32_t                        ImageCount;                   // >= MinImageCount
+    VkSampleCountFlagBits           MSAASamples;                  // 0 defaults to VK_SAMPLE_COUNT_1_BIT
 
-    // Pipeline
-    ImGui_ImplVulkan_PipelineInfo   PipelineInfoMain;           // Infos for Main Viewport (created by app/user)
-    //VkRenderPass                  RenderPass;                 // --> Since 2025/09/26: set 'PipelineInfoMain.RenderPass' instead
-    //uint32_t                      Subpass;                    // --> Since 2025/09/26: set 'PipelineInfoMain.Subpass' instead
-    //VkSampleCountFlagBits         MSAASamples;                // --> Since 2025/09/26: set 'PipelineInfoMain.MSAASamples' instead
-    //VkPipelineRenderingCreateInfoKHR PipelineRenderingCreateInfo; // Since 2025/09/26: set 'PipelineInfoMain.PipelineRenderingCreateInfo' instead
+    // (Optional)
+    VkPipelineCache                 PipelineCache;
+    uint32_t                        Subpass;
+
+    // (Optional) Set to create internal descriptor pool instead of using DescriptorPool
+    uint32_t                        DescriptorPoolSize;
 
     // (Optional) Dynamic Rendering
-    // Need to explicitly enable VK_KHR_dynamic_rendering extension to use this, even for Vulkan 1.3 + setup PipelineInfoMain.PipelineRenderingCreateInfo.
+    // Need to explicitly enable VK_KHR_dynamic_rendering extension to use this, even for Vulkan 1.3.
     bool                            UseDynamicRendering;
+#ifdef IMGUI_IMPL_VULKAN_HAS_DYNAMIC_RENDERING
+    VkPipelineRenderingCreateInfoKHR PipelineRenderingCreateInfo;
+#endif
 
     // (Optional) Allocation, Debugging
     const VkAllocationCallbacks*    Allocator;
     void                            (*CheckVkResultFn)(VkResult err);
-    VkDeviceSize                    MinAllocationSize;          // Minimum allocation size. Set to 1024*1024 to satisfy zealous best practices validation layer and waste a little memory.
-
-    // (Optional) Customize default vertex/fragment shaders.
-    // - if .sType == VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO we use specified structs, otherwise we use defaults.
-    // - Shader inputs/outputs need to match ours. Code/data pointed to by the structure needs to survive for whole during of backend usage.
-    VkShaderModuleCreateInfo        CustomShaderVertCreateInfo;
-    VkShaderModuleCreateInfo        CustomShaderFragCreateInfo;
+    VkDeviceSize                    MinAllocationSize;      // Minimum allocation size. Set to 1024*1024 to satisfy zealous best practices validation layer and waste a little memory.
 };
 
 // Follow "Getting Started" link and check examples/ folder to learn about using backends!
@@ -143,27 +112,19 @@ IMGUI_IMPL_API bool             ImGui_ImplVulkan_Init(ImGui_ImplVulkan_InitInfo*
 IMGUI_IMPL_API void             ImGui_ImplVulkan_Shutdown();
 IMGUI_IMPL_API void             ImGui_ImplVulkan_NewFrame();
 IMGUI_IMPL_API void             ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer command_buffer, VkPipeline pipeline = VK_NULL_HANDLE);
+IMGUI_IMPL_API bool             ImGui_ImplVulkan_CreateFontsTexture();
+IMGUI_IMPL_API void             ImGui_ImplVulkan_DestroyFontsTexture();
 IMGUI_IMPL_API void             ImGui_ImplVulkan_SetMinImageCount(uint32_t min_image_count); // To override MinImageCount after initialization (e.g. if swap chain is recreated)
 
-// (Advanced) Use e.g. if you need to recreate pipeline without reinitializing the backend (see #8110, #8111)
-// The main window pipeline will be created by ImGui_ImplVulkan_Init() if possible (== RenderPass xor (UseDynamicRendering && PipelineRenderingCreateInfo->sType == VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR))
-// Else, the pipeline can be created, or re-created, using ImGui_ImplVulkan_CreateMainPipeline() before rendering.
-IMGUI_IMPL_API void             ImGui_ImplVulkan_CreateMainPipeline(const ImGui_ImplVulkan_PipelineInfo* info);
-
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void             ImGui_ImplVulkan_UpdateTexture(ImTextureData* tex);
-
-// Register a texture (VkDescriptorSet for a VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE == ImTextureID)
-IMGUI_IMPL_API VkDescriptorSet  ImGui_ImplVulkan_AddTexture(VkImageView image_view, VkImageLayout image_layout);
+// Register a texture (VkDescriptorSet == ImTextureID)
+// FIXME: This is experimental in the sense that we are unsure how to best design/tackle this problem
+// Please post to https://github.com/ocornut/imgui/pull/914 if you have suggestions.
+IMGUI_IMPL_API VkDescriptorSet  ImGui_ImplVulkan_AddTexture(VkSampler sampler, VkImageView image_view, VkImageLayout image_layout);
 IMGUI_IMPL_API void             ImGui_ImplVulkan_RemoveTexture(VkDescriptorSet descriptor_set);
 
-#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
-IMGUI_IMPL_API VkDescriptorSet  ImGui_ImplVulkan_AddTexture(VkSampler sampler, VkImageView image_view, VkImageLayout image_layout); // Ignore VkSampler
-#endif
-
 // Optional: load Vulkan functions with a custom function loader
 // This is only useful with IMGUI_IMPL_VULKAN_NO_PROTOTYPES / VK_NO_PROTOTYPES
-IMGUI_IMPL_API bool             ImGui_ImplVulkan_LoadFunctions(uint32_t api_version, PFN_vkVoidFunction(*loader_func)(const char* function_name, void* user_data), void* user_data = nullptr);
+IMGUI_IMPL_API bool             ImGui_ImplVulkan_LoadFunctions(PFN_vkVoidFunction(*loader_func)(const char* function_name, void* user_data), void* user_data = nullptr);
 
 // [BETA] Selected render state data shared with callbacks.
 // This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplVulkan_RenderDrawData() call.
@@ -181,7 +142,6 @@ struct ImGui_ImplVulkan_RenderState
 // Used by example's main.cpp. Used by multi-viewport features. PROBABLY NOT used by your own engine/app.
 //
 // You probably do NOT need to use or care about those functions.
-// WE DO NOT PROVIDE STRONG GUARANTEES OF BACKWARD/FORWARD COMPATIBILITY.
 // Those functions only exist because:
 //   1) they facilitate the readability and maintenance of the multiple main.cpp examples files.
 //   2) the multi-viewport / platform window implementation needs them internally.
@@ -190,17 +150,19 @@ struct ImGui_ImplVulkan_RenderState
 //
 // Your engine/app will likely _already_ have code to setup all that stuff (swap chain,
 // render pass, frame buffers, etc.). You may read this code if you are curious, but
-// it is recommended you use your own custom tailored code to do equivalent work.
+// it is recommended you use you own custom tailored code to do equivalent work.
+//
+// We don't provide a strong guarantee that we won't change those functions API.
 //
 // The ImGui_ImplVulkanH_XXX functions should NOT interact with any of the state used
-// by the regular ImGui_ImplVulkan_XXX functions.
+// by the regular ImGui_ImplVulkan_XXX functions).
 //-------------------------------------------------------------------------
 
 struct ImGui_ImplVulkanH_Frame;
 struct ImGui_ImplVulkanH_Window;
 
 // Helpers
-IMGUI_IMPL_API void                 ImGui_ImplVulkanH_CreateOrResizeWindow(VkInstance instance, VkPhysicalDevice physical_device, VkDevice device, ImGui_ImplVulkanH_Window* wd, uint32_t queue_family, const VkAllocationCallbacks* allocator, int w, int h, uint32_t min_image_count, VkImageUsageFlags image_usage);
+IMGUI_IMPL_API void                 ImGui_ImplVulkanH_CreateOrResizeWindow(VkInstance instance, VkPhysicalDevice physical_device, VkDevice device, ImGui_ImplVulkanH_Window* wd, uint32_t queue_family, const VkAllocationCallbacks* allocator, int w, int h, uint32_t min_image_count);
 IMGUI_IMPL_API void                 ImGui_ImplVulkanH_DestroyWindow(VkInstance instance, VkDevice device, ImGui_ImplVulkanH_Window* wd, const VkAllocationCallbacks* allocator);
 IMGUI_IMPL_API VkSurfaceFormatKHR   ImGui_ImplVulkanH_SelectSurfaceFormat(VkPhysicalDevice physical_device, VkSurfaceKHR surface, const VkFormat* request_formats, int request_formats_count, VkColorSpaceKHR request_color_space);
 IMGUI_IMPL_API VkPresentModeKHR     ImGui_ImplVulkanH_SelectPresentMode(VkPhysicalDevice physical_device, VkSurfaceKHR surface, const VkPresentModeKHR* request_modes, int request_modes_count);
@@ -231,48 +193,29 @@ struct ImGui_ImplVulkanH_FrameSemaphores
 // (Used by example's main.cpp. Used by multi-viewport features. Probably NOT used by your own engine/app.)
 struct ImGui_ImplVulkanH_Window
 {
-    // Input
-    bool                    UseDynamicRendering;
-    VkSurfaceKHR            Surface;            // Surface created and destroyed by caller.
-    VkSurfaceFormatKHR      SurfaceFormat;
-    VkPresentModeKHR        PresentMode;
-    VkAttachmentDescription AttachmentDesc;     // RenderPass creation: main attachment description.
-    VkClearValue            ClearValue;         // RenderPass creation: clear value when using VK_ATTACHMENT_LOAD_OP_CLEAR.
-
-    // Internal
-    int                     Width;              // Generally same as passed to ImGui_ImplVulkanH_CreateOrResizeWindow()
-    int                     Height;
-    VkSwapchainKHR          Swapchain;
-    VkRenderPass            RenderPass;
-    VkPipeline              Pipeline;           // The window pipeline may uses a different VkRenderPass than the one passed in ImGui_ImplVulkan_InitInfo
-    uint32_t                FrameIndex;         // Current frame being rendered to (0 <= FrameIndex < FrameInFlightCount)
-    uint32_t                ImageCount;         // Number of simultaneous in-flight frames (returned by vkGetSwapchainImagesKHR, usually derived from min_image_count)
-    uint32_t                SemaphoreCount;     // Number of simultaneous in-flight frames + 1, to be able to use it in vkAcquireNextImageKHR
-    uint32_t                SemaphoreIndex;     // Current set of swapchain wait semaphores we're using (needs to be distinct from per frame data)
-    ImVector<ImGui_ImplVulkanH_Frame>           Frames;
-    ImVector<ImGui_ImplVulkanH_FrameSemaphores> FrameSemaphores;
+    int                 Width;
+    int                 Height;
+    VkSwapchainKHR      Swapchain;
+    VkSurfaceKHR        Surface;
+    VkSurfaceFormatKHR  SurfaceFormat;
+    VkPresentModeKHR    PresentMode;
+    VkRenderPass        RenderPass;
+    bool                UseDynamicRendering;
+    bool                ClearEnable;
+    VkClearValue        ClearValue;
+    uint32_t            FrameIndex;             // Current frame being rendered to (0 <= FrameIndex < FrameInFlightCount)
+    uint32_t            ImageCount;             // Number of simultaneous in-flight frames (returned by vkGetSwapchainImagesKHR, usually derived from min_image_count)
+    uint32_t            SemaphoreCount;         // Number of simultaneous in-flight frames + 1, to be able to use it in vkAcquireNextImageKHR
+    uint32_t            SemaphoreIndex;         // Current set of swapchain wait semaphores we're using (needs to be distinct from per frame data)
+    ImGui_ImplVulkanH_Frame*            Frames;
+    ImGui_ImplVulkanH_FrameSemaphores*  FrameSemaphores;
 
     ImGui_ImplVulkanH_Window()
     {
         memset((void*)this, 0, sizeof(*this));
-
-        // Parameters to create SwapChain
-        PresentMode = VK_PRESENT_MODE_MAX_ENUM_KHR;     // Ensure we get an error if user doesn't set this.
-
-        // Parameters to create RenderPass
-        AttachmentDesc.format = VK_FORMAT_UNDEFINED;    // Will automatically use wd->SurfaceFormat.format.
-        AttachmentDesc.samples = VK_SAMPLE_COUNT_1_BIT;
-        AttachmentDesc.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
-        AttachmentDesc.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
-        AttachmentDesc.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
-        AttachmentDesc.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
-        AttachmentDesc.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
-        AttachmentDesc.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+        PresentMode = (VkPresentModeKHR)~0;     // Ensure we get an error if user doesn't set this.
+        ClearEnable = true;
     }
 };
 
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_wgpu.cpp

@@ -1,14 +1,13 @@
 // dear imgui: Renderer for WebGPU
-// This needs to be used along with a Platform Binding (e.g. GLFW, SDL2, SDL3)
-// (Please note that WebGPU is a recent API, may not be supported by all browser, and its ecosystem is generally a mess)
+// This needs to be used along with a Platform Binding (e.g. GLFW)
+// (Please note that WebGPU is currently experimental, will not run on non-beta browsers, and may break.)
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'WGPUTextureView' as ImTextureID. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'WGPUTextureView' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
-//  [X] Renderer: Texture updates support for dynamic font system (ImGuiBackendFlags_RendererHasTextures).
-
-// Read imgui_impl_wgpu.h about how to use the IMGUI_IMPL_WEBGPU_BACKEND_WGPU or IMGUI_IMPL_WEBGPU_BACKEND_DAWN flags.
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows). Not meaningful on the web.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -20,13 +19,6 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
-//  2026-03-25: Added support for WGVK native backend via IMGUI_IMPL_WEBGPU_BACKEND_WGVK define, with SPIRV shaders if WGSL is not available. (#9316, #9246, #9257)
-//  2026-03-09: Removed support for Emscripten < 4.0.10. (#9281)
-//  2025-10-16: Update to compile with Dawn and Emscripten's 4.0.10+ '--use-port=emdawnwebgpu' ports. (#8381, #8898)
-//  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
-//  2025-06-12: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. (#8465)
-//  2025-02-26: Recreate image bind groups during render. (#8426, #8046, #7765, #8027) + Update for latest webgpu-native changes.
 //  2024-10-14: Update Dawn support for change of string usages. (#8082, #8083)
 //  2024-10-07: Expose selected render state in ImGui_ImplWGPU_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
 //  2024-10-07: Changed default texture sampler to Clamp instead of Repeat/Wrap.
@@ -50,47 +42,39 @@
 //  2021-02-18: Change blending equation to preserve alpha in output buffer.
 //  2021-01-28: Initial version.
 
-#include "imgui.h"
+// When targeting native platforms (i.e. NOT emscripten), one of IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+// or IMGUI_IMPL_WEBGPU_BACKEND_WGPU must be provided. See imgui_impl_wgpu.h for more details.
+#ifndef __EMSCRIPTEN__
+    #if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) == defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+    #error exactly one of IMGUI_IMPL_WEBGPU_BACKEND_DAWN or IMGUI_IMPL_WEBGPU_BACKEND_WGPU must be defined!
+    #endif
+#else
+    #if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+    #error neither IMGUI_IMPL_WEBGPU_BACKEND_DAWN nor IMGUI_IMPL_WEBGPU_BACKEND_WGPU may be defined if targeting emscripten!
+    #endif
+#endif
 
+#include "imgui.h"
 #ifndef IMGUI_DISABLE
 #include "imgui_impl_wgpu.h"
 #include <limits.h>
-#include <stdio.h>
-
-// One of IMGUI_IMPL_WEBGPU_BACKEND_DAWN or IMGUI_IMPL_WEBGPU_BACKEND_WGPU must be provided. See imgui_impl_wgpu.h for more details.
-#if !defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-#error Exactly one of IMGUI_IMPL_WEBGPU_BACKEND_DAWN, IMGUI_IMPL_WEBGPU_BACKEND_WGPU or IMGUI_IMPL_WEBGPU_BACKEND_WGVK must be defined!
-#endif
-#if defined(__EMSCRIPTEN__) && defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
-#error Emscripten <4.0.10 with '-sUSE_WEBGPU=1' is not supported anymore.
-#endif
-
-#if defined IMGUI_IMPL_WEBGPU_BACKEND_DAWN || defined IMGUI_IMPL_WEBGPU_BACKEND_WGVK
-// Dawn renamed WGPUProgrammableStageDescriptor to WGPUComputeState (see: https://github.com/webgpu-native/webgpu-headers/pull/413)
-// Using type alias until WGPU adopts the same naming convention (#8369)
-using WGPUProgrammableStageDescriptor = WGPUComputeState;
-#endif
+#include <webgpu/webgpu.h>
 
 // Dear ImGui prototypes from imgui_internal.h
-extern ImGuiID ImHashData(const void* data_p, size_t data_size, ImU32 seed);
+extern ImGuiID ImHashData(const void* data_p, size_t data_size, ImU32 seed = 0);
 #define MEMALIGN(_SIZE,_ALIGN)        (((_SIZE) + ((_ALIGN) - 1)) & ~((_ALIGN) - 1))    // Memory align (copied from IM_ALIGN() macro).
 
 // WebGPU data
-struct ImGui_ImplWGPU_Texture
-{
-    WGPUTexture         Texture = nullptr;
-    WGPUTextureView     TextureView = nullptr;
-};
-
 struct RenderResources
 {
-    WGPUSampler         SamplerLinear = nullptr;            // Bilinear sampler
-    WGPUSampler         SamplerNearest = nullptr;           // Nearest/point sampler
-    WGPUBuffer          Uniforms = nullptr;                 // Shader uniforms
-    WGPUBindGroup       CommonBindGroupLinear = nullptr;    // Common bind-group bound to group 0 (uniforms + SamplerLinear)
-    WGPUBindGroup       CommonBindGroupNearest = nullptr;   // Common bind-group bound to group 0 (uniforms + SamplerNearest)
-    ImGuiStorage        ImageBindGroups;                    // Resources bind-group to bind the font/image resources to pipeline (this is a key->value map)
-    WGPUBindGroupLayout ImageBindGroupLayout = nullptr;     // Cache layout used for the image bind group. Avoids allocating unnecessary JS objects when working with WebASM
+    WGPUTexture         FontTexture = nullptr;          // Font texture
+    WGPUTextureView     FontTextureView = nullptr;      // Texture view for font texture
+    WGPUSampler         Sampler = nullptr;              // Sampler for the font texture
+    WGPUBuffer          Uniforms = nullptr;             // Shader uniforms
+    WGPUBindGroup       CommonBindGroup = nullptr;      // Resources bind-group to bind the common resources to pipeline
+    ImGuiStorage        ImageBindGroups;                // Resources bind-group to bind the font/image resources to pipeline (this is a key->value map)
+    WGPUBindGroup       ImageBindGroup = nullptr;       // Default font-resource of Dear ImGui
+    WGPUBindGroupLayout ImageBindGroupLayout = nullptr; // Cache layout used for the image bind group. Avoids allocating unnecessary JS objects when working with WebASM
 };
 
 struct FrameResources
@@ -117,7 +101,6 @@ struct ImGui_ImplWGPU_Data
     WGPUTextureFormat       renderTargetFormat = WGPUTextureFormat_Undefined;
     WGPUTextureFormat       depthStencilFormat = WGPUTextureFormat_Undefined;
     WGPURenderPipeline      pipelineState = nullptr;
-    ImGui_ImplWGPU_RenderState* RenderState = nullptr;  // == ImGui::GetPlatformIO().Renderer_RenderState during rendering.
 
     RenderResources         renderResources;
     FrameResources*         pFrameResources = nullptr;
@@ -190,60 +173,6 @@ fn main(in: VertexOutput) -> @location(0) vec4<f32> {
 }
 )";
 
-// Same shader as __shader_vert_wgsl[] but compiled as SPIRV.
-// 'wgslc -o vert.spv vert.wgsl' + 'binary_to_compressed_c -u8 -nocompress vert.spv'
-static const unsigned char __shader_vert_spirv[1996] =
-{
-    3,2,35,7,0,3,1,0,1,0,23,0,90,0,0,0,0,0,0,0,17,0,2,0,1,0,0,0,14,0,3,0,0,0,0,0,1,0,0,0,15,0,12,0,0,0,0,0,78,0,0,0,109,97,105,110,0,0,0,0,8,0,0,0,12,0,0,0,13,0,0,0,16,0,0,0,18,0,0,0,19,
-    0,0,0,21,0,0,0,71,0,4,0,4,0,0,0,6,0,0,0,16,0,0,0,72,0,5,0,3,0,0,0,0,0,0,0,35,0,0,0,0,0,0,0,71,0,3,0,3,0,0,0,2,0,0,0,71,0,4,0,1,0,0,0,34,0,0,0,0,0,0,0,71,0,4,0,1,0,0,0,33,0,0,0,0,0,
-    0,0,71,0,3,0,1,0,0,0,24,0,0,0,71,0,4,0,8,0,0,0,30,0,0,0,0,0,0,0,71,0,4,0,12,0,0,0,30,0,0,0,1,0,0,0,71,0,4,0,13,0,0,0,30,0,0,0,2,0,0,0,71,0,4,0,16,0,0,0,11,0,0,0,0,0,0,0,71,0,4,0,18,
-    0,0,0,30,0,0,0,0,0,0,0,71,0,4,0,19,0,0,0,30,0,0,0,1,0,0,0,71,0,4,0,21,0,0,0,11,0,0,0,1,0,0,0,21,0,4,0,6,0,0,0,32,0,0,0,0,0,0,0,23,0,4,0,5,0,0,0,6,0,0,0,4,0,0,0,43,0,4,0,6,0,0,0,7,0,
-    0,0,5,0,0,0,28,0,4,0,4,0,0,0,5,0,0,0,7,0,0,0,30,0,3,0,3,0,0,0,4,0,0,0,32,0,4,0,2,0,0,0,2,0,0,0,3,0,0,0,59,0,4,0,2,0,0,0,1,0,0,0,2,0,0,0,22,0,3,0,11,0,0,0,32,0,0,0,23,0,4,0,10,0,0,0,
-    11,0,0,0,2,0,0,0,32,0,4,0,9,0,0,0,1,0,0,0,10,0,0,0,59,0,4,0,9,0,0,0,8,0,0,0,1,0,0,0,59,0,4,0,9,0,0,0,12,0,0,0,1,0,0,0,23,0,4,0,15,0,0,0,11,0,0,0,4,0,0,0,32,0,4,0,14,0,0,0,1,0,0,0,15,
-    0,0,0,59,0,4,0,14,0,0,0,13,0,0,0,1,0,0,0,32,0,4,0,17,0,0,0,3,0,0,0,15,0,0,0,59,0,4,0,17,0,0,0,16,0,0,0,3,0,0,0,59,0,4,0,17,0,0,0,18,0,0,0,3,0,0,0,32,0,4,0,20,0,0,0,3,0,0,0,10,0,0,0,
-    59,0,4,0,20,0,0,0,19,0,0,0,3,0,0,0,32,0,4,0,22,0,0,0,3,0,0,0,11,0,0,0,59,0,4,0,22,0,0,0,21,0,0,0,3,0,0,0,30,0,5,0,24,0,0,0,15,0,0,0,15,0,0,0,10,0,0,0,30,0,5,0,25,0,0,0,10,0,0,0,10,
-    0,0,0,15,0,0,0,33,0,4,0,27,0,0,0,24,0,0,0,25,0,0,0,32,0,4,0,30,0,0,0,7,0,0,0,24,0,0,0,46,0,3,0,24,0,0,0,31,0,0,0,32,0,4,0,33,0,0,0,7,0,0,0,15,0,0,0,43,0,4,0,6,0,0,0,34,0,0,0,0,0,0,
-    0,24,0,4,0,36,0,0,0,15,0,0,0,4,0,0,0,43,0,4,0,11,0,0,0,40,0,0,0,0,0,0,0,43,0,4,0,11,0,0,0,41,0,0,0,0,0,128,63,43,0,4,0,6,0,0,0,44,0,0,0,1,0,0,0,32,0,4,0,47,0,0,0,7,0,0,0,10,0,0,0,43,
-    0,4,0,6,0,0,0,48,0,0,0,2,0,0,0,33,0,4,0,52,0,0,0,36,0,0,0,6,0,0,0,43,0,4,0,6,0,0,0,55,0,0,0,16,0,0,0,32,0,4,0,57,0,0,0,2,0,0,0,5,0,0,0,43,0,4,0,6,0,0,0,66,0,0,0,32,0,0,0,43,0,4,0,6,
-    0,0,0,72,0,0,0,48,0,0,0,19,0,2,0,79,0,0,0,33,0,3,0,80,0,0,0,79,0,0,0,54,0,5,0,24,0,0,0,23,0,0,0,0,0,0,0,27,0,0,0,55,0,3,0,25,0,0,0,26,0,0,0,248,0,2,0,28,0,0,0,59,0,5,0,30,0,0,0,29,
-    0,0,0,7,0,0,0,31,0,0,0,65,0,5,0,33,0,0,0,32,0,0,0,29,0,0,0,34,0,0,0,57,0,5,0,36,0,0,0,35,0,0,0,37,0,0,0,34,0,0,0,81,0,5,0,10,0,0,0,38,0,0,0,26,0,0,0,0,0,0,0,80,0,6,0,15,0,0,0,39,0,
-    0,0,38,0,0,0,40,0,0,0,41,0,0,0,145,0,5,0,15,0,0,0,42,0,0,0,35,0,0,0,39,0,0,0,62,0,4,0,32,0,0,0,42,0,0,0,0,0,0,0,65,0,5,0,33,0,0,0,43,0,0,0,29,0,0,0,44,0,0,0,81,0,5,0,15,0,0,0,45,0,
-    0,0,26,0,0,0,2,0,0,0,62,0,4,0,43,0,0,0,45,0,0,0,0,0,0,0,65,0,5,0,47,0,0,0,46,0,0,0,29,0,0,0,48,0,0,0,81,0,5,0,10,0,0,0,49,0,0,0,26,0,0,0,1,0,0,0,62,0,4,0,46,0,0,0,49,0,0,0,0,0,0,0,
-    61,0,5,0,24,0,0,0,50,0,0,0,29,0,0,0,0,0,0,0,254,0,2,0,50,0,0,0,56,0,1,0,54,0,5,0,36,0,0,0,37,0,0,0,0,0,0,0,52,0,0,0,55,0,3,0,6,0,0,0,51,0,0,0,248,0,2,0,53,0,0,0,134,0,5,0,6,0,0,0,54,
-    0,0,0,51,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,56,0,0,0,1,0,0,0,34,0,0,0,54,0,0,0,61,0,5,0,5,0,0,0,58,0,0,0,56,0,0,0,0,0,0,0,124,0,4,0,15,0,0,0,59,0,0,0,58,0,0,0,128,0,5,0,6,0,0,0,60,0,
-    0,0,55,0,0,0,51,0,0,0,134,0,5,0,6,0,0,0,61,0,0,0,60,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,62,0,0,0,1,0,0,0,34,0,0,0,61,0,0,0,61,0,5,0,5,0,0,0,63,0,0,0,62,0,0,0,0,0,0,0,124,0,4,0,15,0,0,
-    0,64,0,0,0,63,0,0,0,128,0,5,0,6,0,0,0,65,0,0,0,66,0,0,0,51,0,0,0,134,0,5,0,6,0,0,0,67,0,0,0,65,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,68,0,0,0,1,0,0,0,34,0,0,0,67,0,0,0,61,0,5,0,5,0,0,0,
-    69,0,0,0,68,0,0,0,0,0,0,0,124,0,4,0,15,0,0,0,70,0,0,0,69,0,0,0,128,0,5,0,6,0,0,0,71,0,0,0,72,0,0,0,51,0,0,0,134,0,5,0,6,0,0,0,73,0,0,0,71,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,74,0,0,0,
-    1,0,0,0,34,0,0,0,73,0,0,0,61,0,5,0,5,0,0,0,75,0,0,0,74,0,0,0,0,0,0,0,124,0,4,0,15,0,0,0,76,0,0,0,75,0,0,0,80,0,7,0,36,0,0,0,77,0,0,0,59,0,0,0,64,0,0,0,70,0,0,0,76,0,0,0,254,0,2,0,77,
-    0,0,0,56,0,1,0,54,0,5,0,79,0,0,0,78,0,0,0,0,0,0,0,80,0,0,0,248,0,2,0,81,0,0,0,61,0,5,0,10,0,0,0,82,0,0,0,8,0,0,0,0,0,0,0,61,0,5,0,10,0,0,0,83,0,0,0,12,0,0,0,0,0,0,0,61,0,5,0,15,0,0,
-    0,84,0,0,0,13,0,0,0,0,0,0,0,80,0,6,0,25,0,0,0,85,0,0,0,82,0,0,0,83,0,0,0,84,0,0,0,57,0,5,0,24,0,0,0,86,0,0,0,23,0,0,0,85,0,0,0,81,0,5,0,15,0,0,0,87,0,0,0,86,0,0,0,0,0,0,0,62,0,4,0,
-    16,0,0,0,87,0,0,0,0,0,0,0,81,0,5,0,15,0,0,0,88,0,0,0,86,0,0,0,1,0,0,0,62,0,4,0,18,0,0,0,88,0,0,0,0,0,0,0,81,0,5,0,10,0,0,0,89,0,0,0,86,0,0,0,2,0,0,0,62,0,4,0,19,0,0,0,89,0,0,0,0,0,
-    0,0,62,0,4,0,21,0,0,0,41,0,0,0,0,0,0,0,253,0,1,0,56,0,1,0,
-};
-
-// Same shader as __shader_frag_wgsl[] but compiled as SPIRV.
-// 'wgslc -o frag.spv frag.wgsl' + 'binary_to_compressed_c -u8 -nocompress frag.spv'
-static const unsigned char __shader_frag_spirv[1392] =
-{
-    3,2,35,7,0,3,1,0,1,0,23,0,60,0,0,0,0,0,0,0,17,0,2,0,1,0,0,0,11,0,6,0,48,0,0,0,71,76,83,76,46,115,116,100,46,52,53,48,0,0,0,0,14,0,3,0,0,0,0,0,1,0,0,0,15,0,9,0,4,0,0,0,51,0,0,0,109,
-    97,105,110,0,0,0,0,15,0,0,0,18,0,0,0,19,0,0,0,22,0,0,0,16,0,3,0,51,0,0,0,7,0,0,0,71,0,4,0,4,0,0,0,6,0,0,0,16,0,0,0,72,0,5,0,3,0,0,0,0,0,0,0,35,0,0,0,0,0,0,0,71,0,3,0,3,0,0,0,2,0,0,
-    0,71,0,4,0,1,0,0,0,34,0,0,0,0,0,0,0,71,0,4,0,1,0,0,0,33,0,0,0,0,0,0,0,71,0,3,0,1,0,0,0,24,0,0,0,71,0,4,0,8,0,0,0,34,0,0,0,0,0,0,0,71,0,4,0,8,0,0,0,33,0,0,0,1,0,0,0,71,0,4,0,11,0,0,
-    0,34,0,0,0,1,0,0,0,71,0,4,0,11,0,0,0,33,0,0,0,0,0,0,0,71,0,4,0,15,0,0,0,11,0,0,0,15,0,0,0,71,0,4,0,18,0,0,0,30,0,0,0,0,0,0,0,71,0,4,0,19,0,0,0,30,0,0,0,1,0,0,0,71,0,4,0,22,0,0,0,30,
-    0,0,0,0,0,0,0,21,0,4,0,6,0,0,0,32,0,0,0,0,0,0,0,23,0,4,0,5,0,0,0,6,0,0,0,4,0,0,0,43,0,4,0,6,0,0,0,7,0,0,0,5,0,0,0,28,0,4,0,4,0,0,0,5,0,0,0,7,0,0,0,30,0,3,0,3,0,0,0,4,0,0,0,32,0,4,0,
-    2,0,0,0,2,0,0,0,3,0,0,0,59,0,4,0,2,0,0,0,1,0,0,0,2,0,0,0,26,0,2,0,10,0,0,0,32,0,4,0,9,0,0,0,0,0,0,0,10,0,0,0,59,0,4,0,9,0,0,0,8,0,0,0,0,0,0,0,22,0,3,0,14,0,0,0,32,0,0,0,25,0,9,0,13,
-    0,0,0,14,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,32,0,4,0,12,0,0,0,0,0,0,0,13,0,0,0,59,0,4,0,12,0,0,0,11,0,0,0,0,0,0,0,23,0,4,0,17,0,0,0,14,0,0,0,4,0,0,0,32,0,4,0,16,
-    0,0,0,1,0,0,0,17,0,0,0,59,0,4,0,16,0,0,0,15,0,0,0,1,0,0,0,59,0,4,0,16,0,0,0,18,0,0,0,1,0,0,0,23,0,4,0,21,0,0,0,14,0,0,0,2,0,0,0,32,0,4,0,20,0,0,0,1,0,0,0,21,0,0,0,59,0,4,0,20,0,0,0,
-    19,0,0,0,1,0,0,0,32,0,4,0,23,0,0,0,3,0,0,0,17,0,0,0,59,0,4,0,23,0,0,0,22,0,0,0,3,0,0,0,30,0,5,0,25,0,0,0,17,0,0,0,17,0,0,0,21,0,0,0,33,0,4,0,27,0,0,0,17,0,0,0,25,0,0,0,27,0,3,0,34,
-    0,0,0,13,0,0,0,23,0,4,0,38,0,0,0,14,0,0,0,3,0,0,0,32,0,4,0,40,0,0,0,2,0,0,0,5,0,0,0,43,0,4,0,6,0,0,0,41,0,0,0,0,0,0,0,43,0,4,0,6,0,0,0,42,0,0,0,4,0,0,0,19,0,2,0,52,0,0,0,33,0,3,0,53,
-    0,0,0,52,0,0,0,54,0,5,0,17,0,0,0,24,0,0,0,0,0,0,0,27,0,0,0,55,0,3,0,25,0,0,0,26,0,0,0,248,0,2,0,28,0,0,0,81,0,5,0,17,0,0,0,29,0,0,0,26,0,0,0,1,0,0,0,61,0,5,0,13,0,0,0,30,0,0,0,11,0,
-    0,0,0,0,0,0,61,0,5,0,10,0,0,0,31,0,0,0,8,0,0,0,0,0,0,0,81,0,5,0,21,0,0,0,32,0,0,0,26,0,0,0,2,0,0,0,86,0,5,0,34,0,0,0,33,0,0,0,30,0,0,0,31,0,0,0,87,0,6,0,17,0,0,0,35,0,0,0,33,0,0,0,
-    32,0,0,0,0,0,0,0,133,0,5,0,17,0,0,0,36,0,0,0,29,0,0,0,35,0,0,0,79,0,8,0,38,0,0,0,37,0,0,0,36,0,0,0,36,0,0,0,0,0,0,0,1,0,0,0,2,0,0,0,65,0,6,0,40,0,0,0,39,0,0,0,1,0,0,0,41,0,0,0,42,0,
-    0,0,61,0,5,0,5,0,0,0,43,0,0,0,39,0,0,0,0,0,0,0,81,0,5,0,6,0,0,0,44,0,0,0,43,0,0,0,0,0,0,0,124,0,4,0,14,0,0,0,45,0,0,0,44,0,0,0,80,0,6,0,38,0,0,0,46,0,0,0,45,0,0,0,45,0,0,0,45,0,0,0,
-    12,0,7,0,38,0,0,0,47,0,0,0,48,0,0,0,26,0,0,0,37,0,0,0,46,0,0,0,81,0,5,0,14,0,0,0,49,0,0,0,36,0,0,0,3,0,0,0,80,0,5,0,17,0,0,0,50,0,0,0,47,0,0,0,49,0,0,0,254,0,2,0,50,0,0,0,56,0,1,0,
-    54,0,5,0,52,0,0,0,51,0,0,0,0,0,0,0,53,0,0,0,248,0,2,0,54,0,0,0,61,0,5,0,17,0,0,0,55,0,0,0,15,0,0,0,0,0,0,0,61,0,5,0,17,0,0,0,56,0,0,0,18,0,0,0,0,0,0,0,61,0,5,0,21,0,0,0,57,0,0,0,19,
-    0,0,0,0,0,0,0,80,0,6,0,25,0,0,0,58,0,0,0,55,0,0,0,56,0,0,0,57,0,0,0,57,0,5,0,17,0,0,0,59,0,0,0,24,0,0,0,58,0,0,0,62,0,4,0,22,0,0,0,59,0,0,0,0,0,0,0,253,0,1,0,56,0,1,0,
-};
-
 static void SafeRelease(ImDrawIdx*& res)
 {
     if (res)
@@ -298,13 +227,27 @@ static void SafeRelease(WGPUShaderModule& res)
         wgpuShaderModuleRelease(res);
     res = nullptr;
 }
+static void SafeRelease(WGPUTextureView& res)
+{
+    if (res)
+        wgpuTextureViewRelease(res);
+    res = nullptr;
+}
+static void SafeRelease(WGPUTexture& res)
+{
+    if (res)
+        wgpuTextureRelease(res);
+    res = nullptr;
+}
+
 static void SafeRelease(RenderResources& res)
 {
-    SafeRelease(res.SamplerLinear);
-    SafeRelease(res.SamplerNearest);
+    SafeRelease(res.FontTexture);
+    SafeRelease(res.FontTextureView);
+    SafeRelease(res.Sampler);
     SafeRelease(res.Uniforms);
-    SafeRelease(res.CommonBindGroupLinear);
-    SafeRelease(res.CommonBindGroupNearest);
+    SafeRelease(res.CommonBindGroup);
+    SafeRelease(res.ImageBindGroup);
     SafeRelease(res.ImageBindGroupLayout);
 };
 
@@ -316,42 +259,30 @@ static void SafeRelease(FrameResources& res)
     SafeRelease(res.VertexBufferHost);
 }
 
-static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModuleWGSL(const char* wgsl_source)
+static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModule(const char* wgsl_source)
 {
     ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
-    IM_UNUSED(bd);
 
-    WGPUShaderSourceWGSL wgsl_desc = {};
+#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+	WGPUShaderSourceWGSL wgsl_desc = {};
     wgsl_desc.chain.sType = WGPUSType_ShaderSourceWGSL;
-    wgsl_desc.code = { wgsl_source, WGPU_STRLEN };
-
-    WGPUShaderModuleDescriptor desc = {};
-    desc.nextInChain = (WGPUChainedStruct*)&wgsl_desc;
-
-    WGPUProgrammableStageDescriptor stage_desc = {};
-#if !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-    stage_desc.module = wgpuDeviceCreateShaderModule(bd->wgpuDevice, &desc);
-    stage_desc.entryPoint = { "main", WGPU_STRLEN };
+	wgsl_desc.code = { wgsl_source, WGPU_STRLEN };
+#else
+	WGPUShaderModuleWGSLDescriptor wgsl_desc = {};
+    wgsl_desc.chain.sType = WGPUSType_ShaderModuleWGSLDescriptor;
+	wgsl_desc.code = wgsl_source;
 #endif
-    return stage_desc;
-}
-
-static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModuleSPIRV(const void* spirv_binary, size_t spirv_length)
-{
-    ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
-
-    WGPUShaderSourceSPIRV spirv_desc = {};
-    spirv_desc.chain.sType = WGPUSType_ShaderSourceSPIRV;
-    spirv_desc.code = (const uint32_t *)spirv_binary;
-    spirv_desc.codeSize = ((uint32_t)(spirv_length / 4));
 
     WGPUShaderModuleDescriptor desc = {};
-    desc.nextInChain = (WGPUChainedStruct*)&spirv_desc;
+    desc.nextInChain = reinterpret_cast<WGPUChainedStruct*>(&wgsl_desc);
 
     WGPUProgrammableStageDescriptor stage_desc = {};
     stage_desc.module = wgpuDeviceCreateShaderModule(bd->wgpuDevice, &desc);
-
+#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
     stage_desc.entryPoint = { "main", WGPU_STRLEN };
+#else
+    stage_desc.entryPoint = "main";
+#endif
     return stage_desc;
 }
 
@@ -426,34 +357,23 @@ static void ImGui_ImplWGPU_SetupRenderState(ImDrawData* draw_data, WGPURenderPas
     wgpuRenderPassEncoderSetVertexBuffer(ctx, 0, fr->VertexBuffer, 0, fr->VertexBufferSize * sizeof(ImDrawVert));
     wgpuRenderPassEncoderSetIndexBuffer(ctx, fr->IndexBuffer, sizeof(ImDrawIdx) == 2 ? WGPUIndexFormat_Uint16 : WGPUIndexFormat_Uint32, 0, fr->IndexBufferSize * sizeof(ImDrawIdx));
     wgpuRenderPassEncoderSetPipeline(ctx, bd->pipelineState);
-    wgpuRenderPassEncoderSetBindGroup(ctx, 0, bd->renderResources.CommonBindGroupLinear, 0, nullptr);
+    wgpuRenderPassEncoderSetBindGroup(ctx, 0, bd->renderResources.CommonBindGroup, 0, nullptr);
 
     // Setup blend factor
     WGPUColor blend_color = { 0.f, 0.f, 0.f, 0.f };
     wgpuRenderPassEncoderSetBlendConstant(ctx, &blend_color);
 }
 
-// Draw callbacks
-static void ImGui_ImplWGPU_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*)   {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
-static void ImGui_ImplWGPU_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*)   { ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData(); wgpuRenderPassEncoderSetBindGroup(bd->RenderState->RenderPassEncoder, 0, bd->renderResources.CommonBindGroupLinear, 0, nullptr); }
-static void ImGui_ImplWGPU_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*)  { ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData(); wgpuRenderPassEncoderSetBindGroup(bd->RenderState->RenderPassEncoder, 0, bd->renderResources.CommonBindGroupNearest, 0, nullptr); }
-
 // Render function
+// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
 void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder pass_encoder)
 {
     // Avoid rendering when minimized
     int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
     int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
-    if (fb_width <= 0 || fb_height <= 0 || draw_data->CmdLists.Size == 0)
+    if (fb_width <= 0 || fb_height <= 0 || draw_data->CmdListsCount == 0)
         return;
 
-    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                ImGui_ImplWGPU_UpdateTexture(tex);
-
     // FIXME: Assuming that this only gets called once per frame!
     // If not, we can't just re-allocate the IB or VB, we'll have to do a proper allocator.
     ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
@@ -474,7 +394,10 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
         WGPUBufferDescriptor vb_desc =
         {
             nullptr,
-            { "Dear ImGui Vertex buffer", WGPU_STRLEN, },
+            "Dear ImGui Vertex buffer",
+#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+            WGPU_STRLEN,
+#endif
             WGPUBufferUsage_CopyDst | WGPUBufferUsage_Vertex,
             MEMALIGN(fr->VertexBufferSize * sizeof(ImDrawVert), 4),
             false
@@ -498,7 +421,10 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
         WGPUBufferDescriptor ib_desc =
         {
             nullptr,
-            { "Dear ImGui Index buffer", WGPU_STRLEN, },
+            "Dear ImGui Index buffer",
+#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+            WGPU_STRLEN,
+#endif
             WGPUBufferUsage_CopyDst | WGPUBufferUsage_Index,
             MEMALIGN(fr->IndexBufferSize * sizeof(ImDrawIdx), 4),
             false
@@ -513,8 +439,9 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
     // Upload vertex/index data into a single contiguous GPU buffer
     ImDrawVert* vtx_dst = (ImDrawVert*)fr->VertexBufferHost;
     ImDrawIdx* idx_dst = (ImDrawIdx*)fr->IndexBufferHost;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         memcpy(vtx_dst, draw_list->VtxBuffer.Data, draw_list->VtxBuffer.Size * sizeof(ImDrawVert));
         memcpy(idx_dst, draw_list->IdxBuffer.Data, draw_list->IdxBuffer.Size * sizeof(ImDrawIdx));
         vtx_dst += draw_list->VtxBuffer.Size;
@@ -522,8 +449,8 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
     }
     int64_t vb_write_size = MEMALIGN((char*)vtx_dst - (char*)fr->VertexBufferHost, 4);
     int64_t ib_write_size = MEMALIGN((char*)idx_dst - (char*)fr->IndexBufferHost, 4);
-    wgpuQueueWriteBuffer(bd->defaultQueue, fr->VertexBuffer, 0, fr->VertexBufferHost, (size_t)vb_write_size);
-    wgpuQueueWriteBuffer(bd->defaultQueue, fr->IndexBuffer,  0, fr->IndexBufferHost, (size_t)ib_write_size);
+    wgpuQueueWriteBuffer(bd->defaultQueue, fr->VertexBuffer, 0, fr->VertexBufferHost, vb_write_size);
+    wgpuQueueWriteBuffer(bd->defaultQueue, fr->IndexBuffer,  0, fr->IndexBufferHost,  ib_write_size);
 
     // Setup desired render state
     ImGui_ImplWGPU_SetupRenderState(draw_data, pass_encoder, fr);
@@ -533,7 +460,7 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
     ImGui_ImplWGPU_RenderState render_state;
     render_state.Device = bd->wgpuDevice;
     render_state.RenderPassEncoder = pass_encoder;
-    platform_io.Renderer_RenderState = bd->RenderState = &render_state;
+    platform_io.Renderer_RenderState = &render_state;
 
     // Render command lists
     // (Because we merged all buffers into a single one, we maintain our own offset into them)
@@ -541,15 +468,17 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
     int global_idx_offset = 0;
     ImVec2 clip_scale = draw_data->FramebufferScale;
     ImVec2 clip_off = draw_data->DisplayPos;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
+        const ImDrawList* draw_list = draw_data->CmdLists[n];
         for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback != nullptr)
             {
                 // User callback, registered via ImDrawList::AddCallback()
-                if (pcmd->UserCallback == ImGui_ImplWGPU_DrawCallback_ResetRenderState)
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
                     ImGui_ImplWGPU_SetupRenderState(draw_data, pass_encoder, fr);
                 else
                     pcmd->UserCallback(draw_list, pcmd);
@@ -558,13 +487,18 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
             {
                 // Bind custom texture
                 ImTextureID tex_id = pcmd->GetTexID();
-                ImGuiID tex_id_hash = ImHashData(&tex_id, sizeof(tex_id), 0);
-                WGPUBindGroup bind_group = (WGPUBindGroup)bd->renderResources.ImageBindGroups.GetVoidPtr(tex_id_hash);
-                if (!bind_group && tex_id != 0)
-                    if ((bind_group = ImGui_ImplWGPU_CreateImageBindGroup(bd->renderResources.ImageBindGroupLayout, (WGPUTextureView)tex_id)) != 0)
-                        bd->renderResources.ImageBindGroups.SetVoidPtr(tex_id_hash, bind_group);
+                ImGuiID tex_id_hash = ImHashData(&tex_id, sizeof(tex_id));
+                auto bind_group = bd->renderResources.ImageBindGroups.GetVoidPtr(tex_id_hash);
                 if (bind_group)
+                {
                     wgpuRenderPassEncoderSetBindGroup(pass_encoder, 1, (WGPUBindGroup)bind_group, 0, nullptr);
+                }
+                else
+                {
+                    WGPUBindGroup image_bind_group = ImGui_ImplWGPU_CreateImageBindGroup(bd->renderResources.ImageBindGroupLayout, (WGPUTextureView)tex_id);
+                    bd->renderResources.ImageBindGroups.SetVoidPtr(tex_id_hash, image_bind_group);
+                    wgpuRenderPassEncoderSetBindGroup(pass_encoder, 1, image_bind_group, 0, nullptr);
+                }
 
                 // Project scissor/clipping rectangles into framebuffer space
                 ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
@@ -573,8 +507,8 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
                 // Clamp to viewport as wgpuRenderPassEncoderSetScissorRect() won't accept values that are off bounds
                 if (clip_min.x < 0.0f) { clip_min.x = 0.0f; }
                 if (clip_min.y < 0.0f) { clip_min.y = 0.0f; }
-                if (clip_max.x > (float)fb_width) { clip_max.x = (float)fb_width; }
-                if (clip_max.y > (float)fb_height) { clip_max.y = (float)fb_height; }
+                if (clip_max.x > fb_width) { clip_max.x = (float)fb_width; }
+                if (clip_max.y > fb_height) { clip_max.y = (float)fb_height; }
                 if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
                     continue;
 
@@ -586,60 +520,36 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
         global_idx_offset += draw_list->IdxBuffer.Size;
         global_vtx_offset += draw_list->VtxBuffer.Size;
     }
-
-    // Remove all ImageBindGroups
-    ImGuiStorage& image_bind_groups = bd->renderResources.ImageBindGroups;
-    for (int i = 0; i < image_bind_groups.Data.Size; i++)
-    {
-        WGPUBindGroup bind_group = (WGPUBindGroup)image_bind_groups.Data[i].val_p;
-        SafeRelease(bind_group);
-    }
-    image_bind_groups.Data.resize(0);
-
-    platform_io.Renderer_RenderState = bd->RenderState = nullptr;
+    platform_io.Renderer_RenderState = nullptr;
 }
 
-static void ImGui_ImplWGPU_DestroyTexture(ImTextureData* tex)
-{
-    if (ImGui_ImplWGPU_Texture* backend_tex = (ImGui_ImplWGPU_Texture*)tex->BackendUserData)
-    {
-        IM_ASSERT(backend_tex->TextureView == (WGPUTextureView)(intptr_t)tex->TexID);
-        wgpuTextureViewRelease(backend_tex->TextureView);
-        wgpuTextureRelease(backend_tex->Texture);
-        IM_DELETE(backend_tex);
-
-        // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->BackendUserData = nullptr;
-    }
-    tex->SetStatus(ImTextureStatus_Destroyed);
-}
-
-void ImGui_ImplWGPU_UpdateTexture(ImTextureData* tex)
+static void ImGui_ImplWGPU_CreateFontsTexture()
 {
+    // Build texture atlas
     ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create and upload new texture to graphics system
-        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-        ImGui_ImplWGPU_Texture* backend_tex = IM_NEW(ImGui_ImplWGPU_Texture)();
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height, size_pp;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height, &size_pp);
 
-        // Create texture
+    // Upload texture to graphics system
+    {
         WGPUTextureDescriptor tex_desc = {};
-        tex_desc.label = { "Dear ImGui Texture", WGPU_STRLEN };
+#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+        tex_desc.label = { "Dear ImGui Font Texture", WGPU_STRLEN };
+#else
+        tex_desc.label = "Dear ImGui Font Texture";
+#endif
         tex_desc.dimension = WGPUTextureDimension_2D;
-        tex_desc.size.width = tex->Width;
-        tex_desc.size.height = tex->Height;
+        tex_desc.size.width = width;
+        tex_desc.size.height = height;
         tex_desc.size.depthOrArrayLayers = 1;
         tex_desc.sampleCount = 1;
         tex_desc.format = WGPUTextureFormat_RGBA8Unorm;
         tex_desc.mipLevelCount = 1;
         tex_desc.usage = WGPUTextureUsage_CopyDst | WGPUTextureUsage_TextureBinding;
-        backend_tex->Texture = wgpuDeviceCreateTexture(bd->wgpuDevice, &tex_desc);
+        bd->renderResources.FontTexture = wgpuDeviceCreateTexture(bd->wgpuDevice, &tex_desc);
 
-        // Create texture view
         WGPUTextureViewDescriptor tex_view_desc = {};
         tex_view_desc.format = WGPUTextureFormat_RGBA8Unorm;
         tex_view_desc.dimension = WGPUTextureViewDimension_2D;
@@ -648,42 +558,41 @@ void ImGui_ImplWGPU_UpdateTexture(ImTextureData* tex)
         tex_view_desc.baseArrayLayer = 0;
         tex_view_desc.arrayLayerCount = 1;
         tex_view_desc.aspect = WGPUTextureAspect_All;
-        backend_tex->TextureView = wgpuTextureCreateView(backend_tex->Texture, &tex_view_desc);
-
-        // Store identifiers
-        tex->SetTexID((ImTextureID)(intptr_t)backend_tex->TextureView);
-        tex->BackendUserData = backend_tex;
-        // We don't set tex->Status to ImTextureStatus_OK to let the code fallthrough below.
+        bd->renderResources.FontTextureView = wgpuTextureCreateView(bd->renderResources.FontTexture, &tex_view_desc);
     }
 
-    if (tex->Status == ImTextureStatus_WantCreate || tex->Status == ImTextureStatus_WantUpdates)
+    // Upload texture data
     {
-        ImGui_ImplWGPU_Texture* backend_tex = (ImGui_ImplWGPU_Texture*)tex->BackendUserData;
-        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-
-        // We could use the smaller rect on _WantCreate but using the full rect allows us to clear the texture.
-        const int upload_x = (tex->Status == ImTextureStatus_WantCreate) ? 0 : tex->UpdateRect.x;
-        const int upload_y = (tex->Status == ImTextureStatus_WantCreate) ? 0 : tex->UpdateRect.y;
-        const int upload_w = (tex->Status == ImTextureStatus_WantCreate) ? tex->Width : tex->UpdateRect.w;
-        const int upload_h = (tex->Status == ImTextureStatus_WantCreate) ? tex->Height : tex->UpdateRect.h;
-
-        // Update full texture or selected blocks. We only ever write to textures regions which have never been used before!
-        // This backend choose to use tex->UpdateRect but you can use tex->Updates[] to upload individual regions.
-        WGPUTexelCopyTextureInfo dst_view = {};
-        dst_view.texture = backend_tex->Texture;
+        WGPUImageCopyTexture dst_view = {};
+        dst_view.texture = bd->renderResources.FontTexture;
         dst_view.mipLevel = 0;
-        dst_view.origin = { (uint32_t)upload_x, (uint32_t)upload_y, 0 };
+        dst_view.origin = { 0, 0, 0 };
         dst_view.aspect = WGPUTextureAspect_All;
-        WGPUTexelCopyBufferLayout layout = {};
+        WGPUTextureDataLayout layout = {};
         layout.offset = 0;
-        layout.bytesPerRow = tex->Width * tex->BytesPerPixel;
-        layout.rowsPerImage = upload_h;
-        WGPUExtent3D write_size = { (uint32_t)upload_w, (uint32_t)upload_h, 1 };
-        wgpuQueueWriteTexture(bd->defaultQueue, &dst_view, tex->GetPixelsAt(upload_x, upload_y), (uint32_t)(tex->Width * upload_h * tex->BytesPerPixel), &layout, &write_size);
-        tex->SetStatus(ImTextureStatus_OK);
+        layout.bytesPerRow = width * size_pp;
+        layout.rowsPerImage = height;
+        WGPUExtent3D size = { (uint32_t)width, (uint32_t)height, 1 };
+        wgpuQueueWriteTexture(bd->defaultQueue, &dst_view, pixels, (uint32_t)(width * size_pp * height), &layout, &size);
     }
-    if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
-        ImGui_ImplWGPU_DestroyTexture(tex);
+
+    // Create the associated sampler
+    // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+    {
+        WGPUSamplerDescriptor sampler_desc = {};
+        sampler_desc.minFilter = WGPUFilterMode_Linear;
+        sampler_desc.magFilter = WGPUFilterMode_Linear;
+        sampler_desc.mipmapFilter = WGPUMipmapFilterMode_Linear;
+        sampler_desc.addressModeU = WGPUAddressMode_ClampToEdge;
+        sampler_desc.addressModeV = WGPUAddressMode_ClampToEdge;
+        sampler_desc.addressModeW = WGPUAddressMode_ClampToEdge;
+        sampler_desc.maxAnisotropy = 1;
+        bd->renderResources.Sampler = wgpuDeviceCreateSampler(bd->wgpuDevice, &sampler_desc);
+    }
+
+    // Store our identifier
+    static_assert(sizeof(ImTextureID) >= sizeof(bd->renderResources.FontTexture), "Can't pack descriptor handle into TexID, 32-bit not supported yet.");
+    io.Fonts->SetTexID((ImTextureID)bd->renderResources.FontTextureView);
 }
 
 static void ImGui_ImplWGPU_CreateUniformBuffer()
@@ -692,7 +601,10 @@ static void ImGui_ImplWGPU_CreateUniformBuffer()
     WGPUBufferDescriptor ub_desc =
     {
         nullptr,
-        { "Dear ImGui Uniform buffer", WGPU_STRLEN, },
+        "Dear ImGui Uniform buffer",
+#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+        WGPU_STRLEN,
+#endif
         WGPUBufferUsage_CopyDst | WGPUBufferUsage_Uniform,
         MEMALIGN(sizeof(Uniforms), 16),
         false
@@ -749,23 +661,16 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
     graphics_pipeline_desc.layout = wgpuDeviceCreatePipelineLayout(bd->wgpuDevice, &layout_desc);
 
     // Create the vertex shader
-    WGPUProgrammableStageDescriptor vertex_shader_desc = ImGui_ImplWGPU_CreateShaderModuleWGSL(__shader_vert_wgsl);
-    if (!vertex_shader_desc.module) vertex_shader_desc = ImGui_ImplWGPU_CreateShaderModuleSPIRV(__shader_vert_spirv, sizeof(__shader_vert_spirv));
+    WGPUProgrammableStageDescriptor vertex_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__shader_vert_wgsl);
     graphics_pipeline_desc.vertex.module = vertex_shader_desc.module;
     graphics_pipeline_desc.vertex.entryPoint = vertex_shader_desc.entryPoint;
 
     // Vertex input configuration
     WGPUVertexAttribute attribute_desc[] =
     {
-#if defined IMGUI_IMPL_WEBGPU_BACKEND_DAWN || defined IMGUI_IMPL_WEBGPU_BACKEND_WGVK
-        { nullptr, WGPUVertexFormat_Float32x2, (uint64_t)offsetof(ImDrawVert, pos), 0 },
-        { nullptr, WGPUVertexFormat_Float32x2, (uint64_t)offsetof(ImDrawVert, uv),  1 },
-        { nullptr, WGPUVertexFormat_Unorm8x4,  (uint64_t)offsetof(ImDrawVert, col), 2 },
-#else
         { WGPUVertexFormat_Float32x2, (uint64_t)offsetof(ImDrawVert, pos), 0 },
         { WGPUVertexFormat_Float32x2, (uint64_t)offsetof(ImDrawVert, uv),  1 },
         { WGPUVertexFormat_Unorm8x4,  (uint64_t)offsetof(ImDrawVert, col), 2 },
-#endif
     };
 
     WGPUVertexBufferLayout buffer_layouts[1];
@@ -778,8 +683,7 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
     graphics_pipeline_desc.vertex.buffers = buffer_layouts;
 
     // Create the pixel shader
-    WGPUProgrammableStageDescriptor pixel_shader_desc = ImGui_ImplWGPU_CreateShaderModuleWGSL(__shader_frag_wgsl);
-    if (!pixel_shader_desc.module)  pixel_shader_desc = ImGui_ImplWGPU_CreateShaderModuleSPIRV(__shader_frag_spirv, sizeof(__shader_frag_spirv));
+    WGPUProgrammableStageDescriptor pixel_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__shader_frag_wgsl);
 
     // Create the blending setup
     WGPUBlendState blend_state = {};
@@ -806,7 +710,11 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
     // Create depth-stencil State
     WGPUDepthStencilState depth_stencil_state = {};
     depth_stencil_state.format = bd->depthStencilFormat;
+#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
     depth_stencil_state.depthWriteEnabled = WGPUOptionalBool_False;
+#else
+    depth_stencil_state.depthWriteEnabled = false;
+#endif
     depth_stencil_state.depthCompare = WGPUCompareFunction_Always;
     depth_stencil_state.stencilFront.compare = WGPUCompareFunction_Always;
     depth_stencil_state.stencilFront.failOp = WGPUStencilOperation_Keep;
@@ -822,38 +730,26 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
 
     bd->pipelineState = wgpuDeviceCreateRenderPipeline(bd->wgpuDevice, &graphics_pipeline_desc);
 
+    ImGui_ImplWGPU_CreateFontsTexture();
     ImGui_ImplWGPU_CreateUniformBuffer();
 
-    // Create samplers (Linear/Nearest)
-    // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
-    WGPUSamplerDescriptor sampler_desc = {};
-    sampler_desc.addressModeU = WGPUAddressMode_ClampToEdge;
-    sampler_desc.addressModeV = WGPUAddressMode_ClampToEdge;
-    sampler_desc.addressModeW = WGPUAddressMode_ClampToEdge;
-    sampler_desc.maxAnisotropy = 1;
-    sampler_desc.minFilter = WGPUFilterMode_Linear;
-    sampler_desc.magFilter = WGPUFilterMode_Linear;
-    sampler_desc.mipmapFilter = WGPUMipmapFilterMode_Linear;
-    bd->renderResources.SamplerLinear = wgpuDeviceCreateSampler(bd->wgpuDevice, &sampler_desc);
-    sampler_desc.minFilter = WGPUFilterMode_Nearest;
-    sampler_desc.magFilter = WGPUFilterMode_Nearest;
-    sampler_desc.mipmapFilter = WGPUMipmapFilterMode_Nearest;
-    bd->renderResources.SamplerNearest = wgpuDeviceCreateSampler(bd->wgpuDevice, &sampler_desc);
-
-    // Create resource bind groups (one per sampler, otherwise identical)
+    // Create resource bind group
     WGPUBindGroupEntry common_bg_entries[] =
     {
         { nullptr, 0, bd->renderResources.Uniforms, 0, MEMALIGN(sizeof(Uniforms), 16), 0, 0 },
-        { nullptr, 1, 0, 0, 0, bd->renderResources.SamplerLinear, 0 },
+        { nullptr, 1, 0, 0, 0, bd->renderResources.Sampler, 0 },
     };
+
     WGPUBindGroupDescriptor common_bg_descriptor = {};
     common_bg_descriptor.layout = bg_layouts[0];
     common_bg_descriptor.entryCount = sizeof(common_bg_entries) / sizeof(WGPUBindGroupEntry);
     common_bg_descriptor.entries = common_bg_entries;
-    bd->renderResources.CommonBindGroupLinear = wgpuDeviceCreateBindGroup(bd->wgpuDevice, &common_bg_descriptor);
-    common_bg_entries[1].sampler = bd->renderResources.SamplerNearest;
-    bd->renderResources.CommonBindGroupNearest = wgpuDeviceCreateBindGroup(bd->wgpuDevice, &common_bg_descriptor);
+    bd->renderResources.CommonBindGroup = wgpuDeviceCreateBindGroup(bd->wgpuDevice, &common_bg_descriptor);
+
+    WGPUBindGroup image_bind_group = ImGui_ImplWGPU_CreateImageBindGroup(bg_layouts[1], bd->renderResources.FontTextureView);
+    bd->renderResources.ImageBindGroup = image_bind_group;
     bd->renderResources.ImageBindGroupLayout = bg_layouts[1];
+    bd->renderResources.ImageBindGroups.SetVoidPtr(ImHashData(&bd->renderResources.FontTextureView, sizeof(ImTextureID)), image_bind_group);
 
     SafeRelease(vertex_shader_desc.module);
     SafeRelease(pixel_shader_desc.module);
@@ -872,10 +768,8 @@ void ImGui_ImplWGPU_InvalidateDeviceObjects()
     SafeRelease(bd->pipelineState);
     SafeRelease(bd->renderResources);
 
-    // Destroy all textures
-    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
-        if (tex->RefCount == 1)
-            ImGui_ImplWGPU_DestroyTexture(tex);
+    ImGuiIO& io = ImGui::GetIO();
+    io.Fonts->SetTexID(0); // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
 
     for (unsigned int i = 0; i < bd->numFramesInFlight; i++)
         SafeRelease(bd->pFrameResources[i]);
@@ -890,24 +784,16 @@ bool ImGui_ImplWGPU_Init(ImGui_ImplWGPU_InitInfo* init_info)
     // Setup backend capabilities flags
     ImGui_ImplWGPU_Data* bd = IM_NEW(ImGui_ImplWGPU_Data)();
     io.BackendRendererUserData = (void*)bd;
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
 #if defined(__EMSCRIPTEN__)
-    io.BackendRendererName = "imgui_impl_wgpu (Dawn, Emscripten)"; // compiled & linked using EMSCRIPTEN with "--use-port=emdawnwebgpu" flag
-#else
-    io.BackendRendererName = "imgui_impl_wgpu (Dawn, Native)";
-#endif
+    io.BackendRendererName = "imgui_impl_webgpu_emscripten";
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
+    io.BackendRendererName = "imgui_impl_webgpu_dawn";
 #elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
-    io.BackendRendererName = "imgui_impl_wgpu (WGPU, Native)";
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-    io.BackendRendererName = "imgui_impl_wgpu (WGVK, Native)";
+    io.BackendRendererName = "imgui_impl_webgpu_wgpu";
+#else
+    io.BackendRendererName = "imgui_impl_webgpu";
 #endif
     io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
-
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    platform_io.DrawCallback_ResetRenderState = ImGui_ImplWGPU_DrawCallback_ResetRenderState;
-    platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplWGPU_DrawCallback_SetSamplerLinear;
-    platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplWGPU_DrawCallback_SetSamplerNearest;
 
     bd->initInfo = *init_info;
     bd->wgpuDevice = init_info->Device;
@@ -917,7 +803,14 @@ bool ImGui_ImplWGPU_Init(ImGui_ImplWGPU_InitInfo* init_info)
     bd->numFramesInFlight = init_info->NumFramesInFlight;
     bd->frameIndex = UINT_MAX;
 
+    bd->renderResources.FontTexture = nullptr;
+    bd->renderResources.FontTextureView = nullptr;
+    bd->renderResources.Sampler = nullptr;
+    bd->renderResources.Uniforms = nullptr;
+    bd->renderResources.CommonBindGroup = nullptr;
     bd->renderResources.ImageBindGroups.Data.reserve(100);
+    bd->renderResources.ImageBindGroup = nullptr;
+    bd->renderResources.ImageBindGroupLayout = nullptr;
 
     // Create buffers with a default size (they will later be grown as needed)
     bd->pFrameResources = new FrameResources[bd->numFramesInFlight];
@@ -940,7 +833,6 @@ void ImGui_ImplWGPU_Shutdown()
     ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
     IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 
     ImGui_ImplWGPU_InvalidateDeviceObjects();
     delete[] bd->pFrameResources;
@@ -952,8 +844,7 @@ void ImGui_ImplWGPU_Shutdown()
 
     io.BackendRendererName = nullptr;
     io.BackendRendererUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
-    platform_io.ClearRendererHandlers();
+    io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset;
     IM_DELETE(bd);
 }
 
@@ -961,180 +852,9 @@ void ImGui_ImplWGPU_NewFrame()
 {
     ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
     if (!bd->pipelineState)
-        if (!ImGui_ImplWGPU_CreateDeviceObjects())
-            IM_ASSERT(0 && "ImGui_ImplWGPU_CreateDeviceObjects() failed!");
+        ImGui_ImplWGPU_CreateDeviceObjects();
 }
 
-//-------------------------------------------------------------------------
-// Internal Helpers
-// Those are currently used by our example applications.
-//-------------------------------------------------------------------------
-
-bool ImGui_ImplWGPU_IsSurfaceStatusError(WGPUSurfaceGetCurrentTextureStatus status)
-{
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-    return (status == WGPUSurfaceGetCurrentTextureStatus_Error);
-#else
-    return (status == WGPUSurfaceGetCurrentTextureStatus_OutOfMemory || status == WGPUSurfaceGetCurrentTextureStatus_DeviceLost);
-#endif
-}
-
-bool ImGui_ImplWGPU_IsSurfaceStatusSubOptimal(WGPUSurfaceGetCurrentTextureStatus status)
-{
-#if defined(__EMSCRIPTEN__) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
-    return (status == WGPUSurfaceGetCurrentTextureStatus_Timeout || status == WGPUSurfaceGetCurrentTextureStatus_Outdated || status == WGPUSurfaceGetCurrentTextureStatus_Lost);
-#else
-    return (status == WGPUSurfaceGetCurrentTextureStatus_Timeout || status == WGPUSurfaceGetCurrentTextureStatus_Outdated || status == WGPUSurfaceGetCurrentTextureStatus_Lost || status == WGPUSurfaceGetCurrentTextureStatus_SuccessSuboptimal);
-#endif
-}
-
-// Helpers to obtain a string
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-const char* ImGui_ImplWGPU_GetErrorTypeName(WGPUErrorType type)
-{
-    switch (type)
-    {
-    case WGPUErrorType_Validation: return "Validation";
-    case WGPUErrorType_OutOfMemory: return "OutOfMemory";
-    case WGPUErrorType_Unknown: return "Unknown";
-    case WGPUErrorType_Internal: return "Internal";
-    default: return "Unknown";
-    }
-}
-const char* ImGui_ImplWGPU_GetDeviceLostReasonName(WGPUDeviceLostReason type)
-{
-    switch (type)
-    {
-    case WGPUDeviceLostReason_Unknown: return "Unknown";
-    case WGPUDeviceLostReason_Destroyed: return "Destroyed";
-    case WGPUDeviceLostReason_CallbackCancelled: return "CallbackCancelled";
-    case WGPUDeviceLostReason_FailedCreation: return "FailedCreation";
-    default: return "Unknown";
-    }
-}
-#elif !defined(__EMSCRIPTEN__)
-const char* ImGui_ImplWGPU_GetLogLevelName(WGPULogLevel level)
-{
-    switch (level)
-    {
-    case WGPULogLevel_Error: return "Error"; 
-    case WGPULogLevel_Warn: return "Warn";
-    case WGPULogLevel_Info: return "Info";
-    case WGPULogLevel_Debug: return "Debug";
-    case WGPULogLevel_Trace: return "Trace";
-    default: return "Unknown";
-    }
-}
-#endif
-
-const char* ImGui_ImplWGPU_GetBackendTypeName(WGPUBackendType type)
-{
-    switch (type)
-    {
-    case WGPUBackendType_WebGPU: return "WebGPU";
-    case WGPUBackendType_D3D11: return "D3D11";
-    case WGPUBackendType_D3D12: return "D3D12";
-    case WGPUBackendType_Metal: return "Metal";
-    case WGPUBackendType_Vulkan: return "Vulkan";
-    case WGPUBackendType_OpenGL: return "OpenGL";
-    case WGPUBackendType_OpenGLES: return "OpenGLES";
-    default: return "Unknown";
-    }
-}
-
-const char* ImGui_ImplWGPU_GetAdapterTypeName(WGPUAdapterType type)
-{
-    switch (type)
-    {
-    case WGPUAdapterType_DiscreteGPU: return "DiscreteGPU";
-    case WGPUAdapterType_IntegratedGPU: return "IntegratedGPU";
-    case WGPUAdapterType_CPU: return "CPU";
-    default: return "Unknown";
-    }
-}
-
-void ImGui_ImplWGPU_DebugPrintAdapterInfo(const WGPUAdapter& adapter)
-{
-    WGPUAdapterInfo info = {};
-    wgpuAdapterGetInfo(adapter, &info);
-    printf("description: \"%.*s\"\n", (int)info.description.length, info.description.data);
-    printf("vendor: \"%.*s\", vendorID: %x\n", (int)info.vendor.length, info.vendor.data, info.vendorID);
-    printf("architecture: \"%.*s\"\n", (int) info.architecture.length, info.architecture.data);
-    printf("device: \"%.*s\", deviceID: %x\n", (int)info.device.length, info.device.data, info.deviceID);
-    printf("backendType: \"%s\"\n", ImGui_ImplWGPU_GetBackendTypeName(info.backendType));
-    printf("adapterType: \"%s\"\n", ImGui_ImplWGPU_GetAdapterTypeName(info.adapterType));
-    wgpuAdapterInfoFreeMembers(info);
-}
-
-#ifndef __EMSCRIPTEN__
-
-#if defined(__APPLE__)
-// MacOS specific: is necessary to compile with "-x objective-c++" flags
-// (e.g. using cmake: set_source_files_properties(${IMGUI_DIR}/backends/imgui_impl_wgpu.cpp PROPERTIES COMPILE_FLAGS "-x objective-c++") )
-#include <TargetConditionals.h>
-#if TARGET_OS_OSX
-#include <Cocoa/Cocoa.h>
-#include <QuartzCore/CAMetalLayer.h>
-#endif
-#endif
-
-WGPUSurface ImGui_ImplWGPU_CreateWGPUSurfaceHelper(ImGui_ImplWGPU_CreateSurfaceInfo* info)
-{
-    WGPUSurfaceDescriptor surface_descriptor = {};
-    WGPUSurface surface = {};
-#if defined(__APPLE__) && TARGET_OS_OSX
-    if (strcmp(info->System, "cocoa") == 0)
-    {
-        IM_ASSERT(info->RawWindow != nullptr);
-        NSWindow* ns_window = (NSWindow*)info->RawWindow;
-        id metal_layer = [CAMetalLayer layer];
-        [ns_window.contentView setWantsLayer : YES] ;
-        [ns_window.contentView setLayer : metal_layer] ;
-        WGPUSurfaceSourceMetalLayer surface_src_metal = {};
-        surface_src_metal.chain.sType = WGPUSType_SurfaceSourceMetalLayer;
-        surface_src_metal.layer = metal_layer;
-        surface_descriptor.nextInChain = &surface_src_metal.chain;
-        surface = wgpuInstanceCreateSurface(info->Instance, &surface_descriptor);
-    }
-#elif defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
-    if (strcmp(info->System, "wayland") == 0)
-    {
-        IM_ASSERT(info->RawDisplay != nullptr && info->RawSurface != nullptr);
-        WGPUSurfaceSourceWaylandSurface surface_src_wayland = {};
-        surface_src_wayland.chain.sType = WGPUSType_SurfaceSourceWaylandSurface;
-        surface_src_wayland.display = info->RawDisplay;
-        surface_src_wayland.surface = info->RawSurface;
-        surface_descriptor.nextInChain = &surface_src_wayland.chain;
-        surface = wgpuInstanceCreateSurface(info->Instance, &surface_descriptor);
-    }
-    else if (strcmp(info->System, "x11") == 0)
-    {
-        IM_ASSERT(info->RawDisplay != nullptr && info->RawWindow != nullptr);
-        WGPUSurfaceSourceXlibWindow surface_src_xlib = {};
-        surface_src_xlib.chain.sType = WGPUSType_SurfaceSourceXlibWindow;
-        surface_src_xlib.display = info->RawDisplay;
-        surface_src_xlib.window = (uint64_t)info->RawWindow;
-        surface_descriptor.nextInChain = &surface_src_xlib.chain;
-        surface = wgpuInstanceCreateSurface(info->Instance, &surface_descriptor);
-    }
-#elif defined(_WIN32)
-    if (strcmp(info->System, "win32") == 0)
-    {
-        IM_ASSERT(info->RawWindow != nullptr && info->RawInstance != nullptr);
-        WGPUSurfaceSourceWindowsHWND surface_src_hwnd = {};
-        surface_src_hwnd.chain.sType = WGPUSType_SurfaceSourceWindowsHWND;
-        surface_src_hwnd.hinstance = info->RawInstance;
-        surface_src_hwnd.hwnd = info->RawWindow;
-        surface_descriptor.nextInChain = &surface_src_hwnd.chain;
-        surface = wgpuInstanceCreateSurface(info->Instance, &surface_descriptor);
-    }
-#else
-    IM_ASSERT(0 && "Unsupported WebGPU native platform!");
-#endif
-    return surface;
-}
-#endif // #ifndef __EMSCRIPTEN__
-
 //-----------------------------------------------------------------------------
 
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_wgpu.h

@@ -1,24 +1,20 @@
 // dear imgui: Renderer for WebGPU
-// This needs to be used along with a Platform Binding (e.g. GLFW, SDL2, SDL3)
-// (Please note that WebGPU is a recent API, may not be supported by all browser, and its ecosystem is generally a mess)
+// This needs to be used along with a Platform Binding (e.g. GLFW)
+// (Please note that WebGPU is currently experimental, will not run on non-beta browsers, and may break.)
 
-// When targeting native platforms:
-//  - One of IMGUI_IMPL_WEBGPU_BACKEND_DAWN, IMGUI_IMPL_WEBGPU_BACKEND_WGPU or IMGUI_IMPL_WEBGPU_BACKEND_WGVK *must* be provided.
-// When targeting Emscripten:
-//  - We now defaults to IMGUI_IMPL_WEBGPU_BACKEND_DAWN and requires Emscripten 4.0.10+, which correspond to using Emscripten '--use-port=emdawnwebgpu'.
-//  - Emscripten < 4.0.10 is not supported anymore (old '-sUSE_WEBGPU=1' option).
-//  - We can still define IMGUI_IMPL_WEBGPU_BACKEND_WGPU to use Emscripten '-s USE_WEBGPU=1' which is marked as obsolete by Emscripten.
+// Important note to dawn and/or wgpu users: when targeting native platforms (i.e. NOT emscripten),
+// one of IMGUI_IMPL_WEBGPU_BACKEND_DAWN or IMGUI_IMPL_WEBGPU_BACKEND_WGPU must be provided.
 // Add #define to your imconfig.h file, or as a compilation flag in your build system.
-// This requirement may be removed once WebGPU stabilizes and backends converge on a unified interface.
+// This requirement will be removed once WebGPU stabilizes and backends converge on a unified interface.
 //#define IMGUI_IMPL_WEBGPU_BACKEND_DAWN
 //#define IMGUI_IMPL_WEBGPU_BACKEND_WGPU
-//#define IMGUI_IMPL_WEBGPU_BACKEND_WGVK
 
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'WGPUTextureView' as ImTextureID. Read the FAQ about ImTextureID/ImTextureRef!
+//  [X] Renderer: User texture binding. Use 'WGPUTextureView' as ImTextureID. Read the FAQ about ImTextureID!
 //  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
 //  [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
-//  [X] Renderer: Texture updates support for dynamic font system (ImGuiBackendFlags_RendererHasTextures).
+// Missing features:
+//  [ ] Renderer: Multi-viewport support (multiple windows). Not meaningful on the web.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -32,21 +28,12 @@
 #include "imgui.h"          // IMGUI_IMPL_API
 #ifndef IMGUI_DISABLE
 
-// Setup Emscripten default if not specified.
-#if defined(__EMSCRIPTEN__) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
-#include <emscripten/version.h>
-#define IMGUI_IMPL_WEBGPU_BACKEND_DAWN
-#endif
-
 #include <webgpu/webgpu.h>
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) && !defined(__EMSCRIPTEN__)
-#include <webgpu/wgpu.h>        // WGPULogLevel
-#endif
 
 // Initialization data, for ImGui_ImplWGPU_Init()
 struct ImGui_ImplWGPU_InitInfo
 {
-    WGPUDevice              Device = nullptr;
+    WGPUDevice              Device;
     int                     NumFramesInFlight = 3;
     WGPUTextureFormat       RenderTargetFormat = WGPUTextureFormat_Undefined;
     WGPUTextureFormat       DepthStencilFormat = WGPUTextureFormat_Undefined;
@@ -70,9 +57,6 @@ IMGUI_IMPL_API void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURen
 IMGUI_IMPL_API bool ImGui_ImplWGPU_CreateDeviceObjects();
 IMGUI_IMPL_API void ImGui_ImplWGPU_InvalidateDeviceObjects();
 
-// (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
-IMGUI_IMPL_API void ImGui_ImplWGPU_UpdateTexture(ImTextureData* tex);
-
 // [BETA] Selected render state data shared with callbacks.
 // This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplWGPU_RenderDrawData() call.
 // (Please open an issue if you feel you need access to more data)
@@ -82,38 +66,4 @@ struct ImGui_ImplWGPU_RenderState
     WGPURenderPassEncoder       RenderPassEncoder;
 };
 
-//-------------------------------------------------------------------------
-// Internal Helpers
-// Those are currently used by our example applications.
-//-------------------------------------------------------------------------
-
-// (Optional) Helper to wrap some of the Dawn/WGPU/Emscripten quirks
-bool        ImGui_ImplWGPU_IsSurfaceStatusError(WGPUSurfaceGetCurrentTextureStatus status);
-bool        ImGui_ImplWGPU_IsSurfaceStatusSubOptimal(WGPUSurfaceGetCurrentTextureStatus status);    // Return whether the texture is suboptimal and may need to be recreated.
-
-// (Optional) Helper for debugging/logging
-void        ImGui_ImplWGPU_DebugPrintAdapterInfo(const WGPUAdapter& adapter);
-const char* ImGui_ImplWGPU_GetBackendTypeName(WGPUBackendType type);
-const char* ImGui_ImplWGPU_GetAdapterTypeName(WGPUAdapterType type);
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
-const char* ImGui_ImplWGPU_GetDeviceLostReasonName(WGPUDeviceLostReason type);
-const char* ImGui_ImplWGPU_GetErrorTypeName(WGPUErrorType type);
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
-const char* ImGui_ImplWGPU_GetLogLevelName(WGPULogLevel level);
-#endif
-
-// (Optional) Helper to create a surface on macOS/Wayland/X11/Window
-#ifndef __EMSCRIPTEN__
-struct ImGui_ImplWGPU_CreateSurfaceInfo
-{
-    WGPUInstance    Instance;
-    const char*     System;      // "cocoa"   | "wayland"   | "x11"     | "win32"
-    void*           RawWindow;   // NSWindow* | 0           | Window    | HWND
-    void*           RawDisplay;  // 0         | wl_display* | Display*  | 0
-    void*           RawSurface;  //           | wl_surface* | 0         | 0
-    void*           RawInstance; // 0         | 0           | 0         | HINSTANCE
-};
-WGPUSurface ImGui_ImplWGPU_CreateWGPUSurfaceHelper(ImGui_ImplWGPU_CreateSurfaceInfo* info);
-#endif // #ifndef __EMSCRIPTEN__
-
 #endif // #ifndef IMGUI_DISABLE

backends/imgui_impl_win32.cpp

@@ -5,8 +5,9 @@
 //  [X] Platform: Clipboard support (for Win32 this is actually part of core dear imgui)
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen/Pen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy VK_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+//  [X] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -21,14 +22,10 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2026-01-28: Inputs: Minor optimization not submitting gamepad input if packet number has not changed (reworked from 2025-09-23 attempt). (#9202, #8556)
-//  2025-12-03: Inputs: handle WM_IME_CHAR/WM_IME_COMPOSITION messages to support Unicode inputs on MBCS (non-Unicode) Windows. (#9099, #3653, #5961)
-//  2025-10-19: Inputs: Revert previous change to allow for io.ClearInputKeys() on focus-out not losing gamepad state.
-//  2025-09-23: Inputs: Minor optimization not submitting gamepad input if packet number has not changed.
-//  2025-09-18: Call platform_io.ClearPlatformHandlers() on shutdown.
-//  2025-04-30: Inputs: Fixed an issue where externally losing mouse capture (due to e.g. focus loss) would fail to claim it again the next subsequent click. (#8594)
-//  2025-03-10: When dealing with OEM keys, use scancodes instead of translated keycodes to choose ImGuiKey values. (#7136, #7201, #7206, #7306, #7670, #7672, #8468)
-//  2025-02-18: Added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress mouse cursor support.
+//  2025-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
+//  2024-11-21: [Docking] Fixed a crash when multiple processes are running with multi-viewports, caused by misusage of GetProp(). (#8162, #8069)
+//  2024-10-28: [Docking] Rely on property stored inside HWND to retrieve context/viewport, should facilitate attempt to use this for parallel contexts. (#8069)
+//  2024-09-16: [Docking] Inputs: fixed an issue where a viewport destroyed while clicking would hog mouse tracking and temporary lead to incorrect update of HoveredWindow. (#7971)
 //  2024-07-08: Inputs: Fixed ImGuiMod_Super being mapped to VK_APPS instead of VK_LWIN||VK_RWIN. (#7768)
 //  2023-10-05: Inputs: Added support for extra ImGuiKey values: F13 to F24 function keys, app back/forward keys.
 //  2023-09-25: Inputs: Synthesize key-down event on key-up for VK_SNAPSHOT / ImGuiKey_PrintScreen as Windows doesn't emit it (same behavior as GLFW/SDL).
@@ -111,6 +108,11 @@ typedef DWORD(WINAPI* PFN_XInputGetState)(DWORD, XINPUT_STATE*);
 #pragma GCC diagnostic ignored "-Wcast-function-type"       // warning: cast between incompatible function types (for loader)
 #endif
 
+// Forward Declarations
+static void ImGui_ImplWin32_InitMultiViewportSupport(bool platform_has_own_dc);
+static void ImGui_ImplWin32_ShutdownMultiViewportSupport();
+static void ImGui_ImplWin32_UpdateMonitors();
+
 struct ImGui_ImplWin32_Data
 {
     HWND                        hWnd;
@@ -121,6 +123,7 @@ struct ImGui_ImplWin32_Data
     INT64                       TicksPerSecond;
     ImGuiMouseCursor            LastMouseCursor;
     UINT32                      KeyboardCodePage;
+    bool                        WantUpdateMonitors;
 
 #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
     bool                        HasGamepad;
@@ -128,7 +131,6 @@ struct ImGui_ImplWin32_Data
     HMODULE                     XInputDLL;
     PFN_XInputGetCapabilities   XInputGetCapabilities;
     PFN_XInputGetState          XInputGetState;
-    DWORD                       XInputPacketNumber;
 #endif
 
     ImGui_ImplWin32_Data()      { memset((void*)this, 0, sizeof(*this)); }
@@ -176,6 +178,8 @@ static bool ImGui_ImplWin32_InitEx(void* hwnd, bool platform_has_own_dc)
     io.BackendPlatformName = "imgui_impl_win32";
     io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;         // We can honor GetMouseCursor() values (optional)
     io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos;          // We can honor io.WantSetMousePos requests (optional, rarely used)
+    io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports;    // We can create multi-viewports on the Platform side (optional)
+    io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport; // We can call io.AddMouseViewportEvent() with correct data (optional)
 
     bd->hWnd = (HWND)hwnd;
     bd->TicksPerSecond = perf_frequency;
@@ -183,10 +187,17 @@ static bool ImGui_ImplWin32_InitEx(void* hwnd, bool platform_has_own_dc)
     bd->LastMouseCursor = ImGuiMouseCursor_COUNT;
     ImGui_ImplWin32_UpdateKeyboardCodePage(io);
 
+    // Update monitor a first time during init
+    ImGui_ImplWin32_UpdateMonitors();
+
     // Our mouse update function expect PlatformHandle to be filled for the main viewport
     ImGuiViewport* main_viewport = ImGui::GetMainViewport();
     main_viewport->PlatformHandle = main_viewport->PlatformHandleRaw = (void*)bd->hWnd;
-    IM_UNUSED(platform_has_own_dc); // Used in 'docking' branch
+
+    // Be aware that GetPropA()/SetPropA() may be accessed from other processes.
+    // So as we store a pointer in IMGUI_CONTEXT we need to make sure we only call GetPropA() on windows owned by our process.
+    ::SetPropA(bd->hWnd, "IMGUI_CONTEXT", ImGui::GetCurrentContext());
+    ImGui_ImplWin32_InitMultiViewportSupport(platform_has_own_dc);
 
     // Dynamically load XInput library
 #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
@@ -199,7 +210,7 @@ static bool ImGui_ImplWin32_InitEx(void* hwnd, bool platform_has_own_dc)
         "xinput1_2.dll",   // DirectX SDK
         "xinput1_1.dll"    // DirectX SDK
     };
-    for (int n = 0; n < IM_COUNTOF(xinput_dll_names); n++)
+    for (int n = 0; n < IM_ARRAYSIZE(xinput_dll_names); n++)
         if (HMODULE dll = ::LoadLibraryA(xinput_dll_names[n]))
         {
             bd->XInputDLL = dll;
@@ -228,7 +239,9 @@ void    ImGui_ImplWin32_Shutdown()
     ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData();
     IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
     ImGuiIO& io = ImGui::GetIO();
-    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+
+    ::SetPropA(bd->hWnd, "IMGUI_CONTEXT", nullptr);
+    ImGui_ImplWin32_ShutdownMultiViewportSupport();
 
     // Unload XInput library
 #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
@@ -238,8 +251,7 @@ void    ImGui_ImplWin32_Shutdown()
 
     io.BackendPlatformName = nullptr;
     io.BackendPlatformUserData = nullptr;
-    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos | ImGuiBackendFlags_HasGamepad);
-    platform_io.ClearPlatformHandlers();
+    io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos | ImGuiBackendFlags_HasGamepad | ImGuiBackendFlags_PlatformHasViewports | ImGuiBackendFlags_HasMouseHoveredViewport);
     IM_DELETE(bd);
 }
 
@@ -267,8 +279,6 @@ static bool ImGui_ImplWin32_UpdateMouseCursor(ImGuiIO& io, ImGuiMouseCursor imgu
         case ImGuiMouseCursor_ResizeNESW:   win32_cursor = IDC_SIZENESW; break;
         case ImGuiMouseCursor_ResizeNWSE:   win32_cursor = IDC_SIZENWSE; break;
         case ImGuiMouseCursor_Hand:         win32_cursor = IDC_HAND; break;
-        case ImGuiMouseCursor_Wait:         win32_cursor = IDC_WAIT; break;
-        case ImGuiMouseCursor_Progress:     win32_cursor = IDC_APPSTARTING; break;
         case ImGuiMouseCursor_NotAllowed:   win32_cursor = IDC_NO; break;
         }
         ::SetCursor(::LoadCursor(nullptr, win32_cursor));
@@ -311,32 +321,69 @@ static void ImGui_ImplWin32_UpdateKeyModifiers(ImGuiIO& io)
     io.AddKeyEvent(ImGuiMod_Super, IsVkDown(VK_LWIN) || IsVkDown(VK_RWIN));
 }
 
-static void ImGui_ImplWin32_UpdateMouseData(ImGuiIO& io)
+static ImGuiViewport* ImGui_ImplWin32_FindViewportByPlatformHandle(ImGuiPlatformIO& platform_io, HWND hwnd)
+{
+    // We cannot use ImGui::FindViewportByPlatformHandle() because it doesn't take a context.
+    // When called from ImGui_ImplWin32_WndProcHandler_PlatformWindow() we don't assume that context is bound.
+    //return ImGui::FindViewportByPlatformHandle((void*)hwnd);
+    for (ImGuiViewport* viewport : platform_io.Viewports)
+        if (viewport->PlatformHandle == hwnd)
+            return viewport;
+    return nullptr;
+}
+
+// This code supports multi-viewports (multiple OS Windows mapped into different Dear ImGui viewports)
+// Because of that, it is a little more complicated than your typical single-viewport binding code!
+static void ImGui_ImplWin32_UpdateMouseData(ImGuiIO& io, ImGuiPlatformIO& platform_io)
 {
     ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(io);
     IM_ASSERT(bd->hWnd != 0);
 
+    POINT mouse_screen_pos;
+    bool has_mouse_screen_pos = ::GetCursorPos(&mouse_screen_pos) != 0;
+
     HWND focused_window = ::GetForegroundWindow();
-    const bool is_app_focused = (focused_window == bd->hWnd);
+    const bool is_app_focused = (focused_window && (focused_window == bd->hWnd || ::IsChild(focused_window, bd->hWnd) || ImGui_ImplWin32_FindViewportByPlatformHandle(platform_io, focused_window)));
     if (is_app_focused)
     {
         // (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when io.ConfigNavMoveSetMousePos is enabled by user)
+        // When multi-viewports are enabled, all Dear ImGui positions are same as OS positions.
         if (io.WantSetMousePos)
         {
             POINT pos = { (int)io.MousePos.x, (int)io.MousePos.y };
-            if (::ClientToScreen(bd->hWnd, &pos))
-                ::SetCursorPos(pos.x, pos.y);
+            if ((io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) == 0)
+                ::ClientToScreen(focused_window, &pos);
+            ::SetCursorPos(pos.x, pos.y);
         }
 
         // (Optional) Fallback to provide mouse position when focused (WM_MOUSEMOVE already provides this when hovered or captured)
         // This also fills a short gap when clicking non-client area: WM_NCMOUSELEAVE -> modal OS move -> gap -> WM_NCMOUSEMOVE
-        if (!io.WantSetMousePos && bd->MouseTrackedArea == 0)
+        if (!io.WantSetMousePos && bd->MouseTrackedArea == 0 && has_mouse_screen_pos)
         {
-            POINT pos;
-            if (::GetCursorPos(&pos) && ::ScreenToClient(bd->hWnd, &pos))
-                io.AddMousePosEvent((float)pos.x, (float)pos.y);
+            // Single viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window)
+            // (This is the position you can get with ::GetCursorPos() + ::ScreenToClient() or WM_MOUSEMOVE.)
+            // Multi-viewport mode: mouse position in OS absolute coordinates (io.MousePos is (0,0) when the mouse is on the upper-left of the primary monitor)
+            // (This is the position you can get with ::GetCursorPos() or WM_MOUSEMOVE + ::ClientToScreen(). In theory adding viewport->Pos to a client position would also be the same.)
+            POINT mouse_pos = mouse_screen_pos;
+            if (!(io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable))
+                ::ScreenToClient(bd->hWnd, &mouse_pos);
+            io.AddMousePosEvent((float)mouse_pos.x, (float)mouse_pos.y);
         }
     }
+
+    // (Optional) When using multiple viewports: call io.AddMouseViewportEvent() with the viewport the OS mouse cursor is hovering.
+    // If ImGuiBackendFlags_HasMouseHoveredViewport is not set by the backend, Dear imGui will ignore this field and infer the information using its flawed heuristic.
+    // - [X] Win32 backend correctly ignore viewports with the _NoInputs flag (here using ::WindowFromPoint with WM_NCHITTEST + HTTRANSPARENT in WndProc does that)
+    //       Some backend are not able to handle that correctly. If a backend report an hovered viewport that has the _NoInputs flag (e.g. when dragging a window
+    //       for docking, the viewport has the _NoInputs flag in order to allow us to find the viewport under), then Dear ImGui is forced to ignore the value reported
+    //       by the backend, and use its flawed heuristic to guess the viewport behind.
+    // - [X] Win32 backend correctly reports this regardless of another viewport behind focused and dragged from (we need this to find a useful drag and drop target).
+    ImGuiID mouse_viewport_id = 0;
+    if (has_mouse_screen_pos)
+        if (HWND hovered_hwnd = ::WindowFromPoint(mouse_screen_pos))
+            if (ImGuiViewport* viewport = ImGui_ImplWin32_FindViewportByPlatformHandle(platform_io, hovered_hwnd))
+                mouse_viewport_id = viewport->ID;
+    io.AddMouseViewportEvent(mouse_viewport_id);
 }
 
 // Gamepad navigation mapping
@@ -344,6 +391,8 @@ static void ImGui_ImplWin32_UpdateGamepads(ImGuiIO& io)
 {
 #ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
     ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData(io);
+    //if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0) // FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
+    //    return;
 
     // Calling XInputGetState() every frame on disconnected gamepads is unfortunately too slow.
     // Instead we refresh gamepad availability by calling XInputGetCapabilities() _only_ after receiving WM_DEVICECHANGE.
@@ -360,9 +409,6 @@ static void ImGui_ImplWin32_UpdateGamepads(ImGuiIO& io)
     if (!bd->HasGamepad || bd->XInputGetState == nullptr || bd->XInputGetState(0, &xinput_state) != ERROR_SUCCESS)
         return;
     io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
-    if (bd->XInputPacketNumber != 0 && bd->XInputPacketNumber == xinput_state.dwPacketNumber)
-        return;
-    bd->XInputPacketNumber = xinput_state.dwPacketNumber;
 
     #define IM_SATURATE(V)                      (V < 0.0f ? 0.0f : V > 1.0f ? 1.0f : V)
     #define MAP_BUTTON(KEY_NO, BUTTON_ENUM)     { io.AddKeyEvent(KEY_NO, (gamepad.wButtons & BUTTON_ENUM) != 0); }
@@ -398,25 +444,59 @@ static void ImGui_ImplWin32_UpdateGamepads(ImGuiIO& io)
 #endif
 }
 
+static BOOL CALLBACK ImGui_ImplWin32_UpdateMonitors_EnumFunc(HMONITOR monitor, HDC, LPRECT, LPARAM)
+{
+    MONITORINFO info = {};
+    info.cbSize = sizeof(MONITORINFO);
+    if (!::GetMonitorInfo(monitor, &info))
+        return TRUE;
+    ImGuiPlatformMonitor imgui_monitor;
+    imgui_monitor.MainPos = ImVec2((float)info.rcMonitor.left, (float)info.rcMonitor.top);
+    imgui_monitor.MainSize = ImVec2((float)(info.rcMonitor.right - info.rcMonitor.left), (float)(info.rcMonitor.bottom - info.rcMonitor.top));
+    imgui_monitor.WorkPos = ImVec2((float)info.rcWork.left, (float)info.rcWork.top);
+    imgui_monitor.WorkSize = ImVec2((float)(info.rcWork.right - info.rcWork.left), (float)(info.rcWork.bottom - info.rcWork.top));
+    imgui_monitor.DpiScale = ImGui_ImplWin32_GetDpiScaleForMonitor(monitor);
+    imgui_monitor.PlatformHandle = (void*)monitor;
+    if (imgui_monitor.DpiScale <= 0.0f)
+        return TRUE; // Some accessibility applications are declaring virtual monitors with a DPI of 0, see #7902.
+    ImGuiPlatformIO& io = ImGui::GetPlatformIO();
+    if (info.dwFlags & MONITORINFOF_PRIMARY)
+        io.Monitors.push_front(imgui_monitor);
+    else
+        io.Monitors.push_back(imgui_monitor);
+    return TRUE;
+}
+
+static void ImGui_ImplWin32_UpdateMonitors()
+{
+    ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData();
+    ImGui::GetPlatformIO().Monitors.resize(0);
+    ::EnumDisplayMonitors(nullptr, nullptr, ImGui_ImplWin32_UpdateMonitors_EnumFunc, 0);
+    bd->WantUpdateMonitors = false;
+}
+
 void    ImGui_ImplWin32_NewFrame()
 {
     ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData();
     IM_ASSERT(bd != nullptr && "Context or backend not initialized? Did you call ImGui_ImplWin32_Init()?");
     ImGuiIO& io = ImGui::GetIO();
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
 
     // Setup display size (every frame to accommodate for window resizing)
     RECT rect = { 0, 0, 0, 0 };
     ::GetClientRect(bd->hWnd, &rect);
     io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
+    if (bd->WantUpdateMonitors)
+        ImGui_ImplWin32_UpdateMonitors();
 
     // Setup time step
     INT64 current_time = 0;
     ::QueryPerformanceCounter((LARGE_INTEGER*)&current_time);
-    io.DeltaTime = (float)((double)(current_time - bd->Time) / (double)bd->TicksPerSecond);
+    io.DeltaTime = (float)(current_time - bd->Time) / bd->TicksPerSecond;
     bd->Time = current_time;
 
     // Update OS mouse position
-    ImGui_ImplWin32_UpdateMouseData(io);
+    ImGui_ImplWin32_UpdateMouseData(io, platform_io);
 
     // Process workarounds for known Windows key handling issues
     ImGui_ImplWin32_ProcessKeyEventsWorkarounds(io);
@@ -442,8 +522,6 @@ ImGuiKey ImGui_ImplWin32_KeyEventToImGuiKey(WPARAM wParam, LPARAM lParam)
     if ((wParam == VK_RETURN) && (HIWORD(lParam) & KF_EXTENDED))
         return ImGuiKey_KeypadEnter;
 
-    const int scancode = (int)LOBYTE(HIWORD(lParam));
-    //IMGUI_DEBUG_LOG("scancode %3d, keycode = 0x%02X\n", scancode, wParam);
     switch (wParam)
     {
         case VK_TAB: return ImGuiKey_Tab;
@@ -461,17 +539,17 @@ ImGuiKey ImGui_ImplWin32_KeyEventToImGuiKey(WPARAM wParam, LPARAM lParam)
         case VK_SPACE: return ImGuiKey_Space;
         case VK_RETURN: return ImGuiKey_Enter;
         case VK_ESCAPE: return ImGuiKey_Escape;
-        //case VK_OEM_7: return ImGuiKey_Apostrophe;
+        case VK_OEM_7: return ImGuiKey_Apostrophe;
         case VK_OEM_COMMA: return ImGuiKey_Comma;
-        //case VK_OEM_MINUS: return ImGuiKey_Minus;
+        case VK_OEM_MINUS: return ImGuiKey_Minus;
         case VK_OEM_PERIOD: return ImGuiKey_Period;
-        //case VK_OEM_2: return ImGuiKey_Slash;
-        //case VK_OEM_1: return ImGuiKey_Semicolon;
-        //case VK_OEM_PLUS: return ImGuiKey_Equal;
-        //case VK_OEM_4: return ImGuiKey_LeftBracket;
-        //case VK_OEM_5: return ImGuiKey_Backslash;
-        //case VK_OEM_6: return ImGuiKey_RightBracket;
-        //case VK_OEM_3: return ImGuiKey_GraveAccent;
+        case VK_OEM_2: return ImGuiKey_Slash;
+        case VK_OEM_1: return ImGuiKey_Semicolon;
+        case VK_OEM_PLUS: return ImGuiKey_Equal;
+        case VK_OEM_4: return ImGuiKey_LeftBracket;
+        case VK_OEM_5: return ImGuiKey_Backslash;
+        case VK_OEM_6: return ImGuiKey_RightBracket;
+        case VK_OEM_3: return ImGuiKey_GraveAccent;
         case VK_CAPITAL: return ImGuiKey_CapsLock;
         case VK_SCROLL: return ImGuiKey_ScrollLock;
         case VK_NUMLOCK: return ImGuiKey_NumLock;
@@ -563,29 +641,8 @@ ImGuiKey ImGui_ImplWin32_KeyEventToImGuiKey(WPARAM wParam, LPARAM lParam)
         case VK_F24: return ImGuiKey_F24;
         case VK_BROWSER_BACK: return ImGuiKey_AppBack;
         case VK_BROWSER_FORWARD: return ImGuiKey_AppForward;
-        default: break;
+        default: return ImGuiKey_None;
     }
-
-    // Fallback to scancode
-    // https://handmade.network/forums/t/2011-keyboard_inputs_-_scancodes,_raw_input,_text_input,_key_names
-    switch (scancode)
-    {
-    case 41: return ImGuiKey_GraveAccent;  // VK_OEM_8 in EN-UK, VK_OEM_3 in EN-US, VK_OEM_7 in FR, VK_OEM_5 in DE, etc.
-    case 12: return ImGuiKey_Minus;
-    case 13: return ImGuiKey_Equal;
-    case 26: return ImGuiKey_LeftBracket;
-    case 27: return ImGuiKey_RightBracket;
-    case 86: return ImGuiKey_Oem102;
-    case 43: return ImGuiKey_Backslash;
-    case 39: return ImGuiKey_Semicolon;
-    case 40: return ImGuiKey_Apostrophe;
-    case 51: return ImGuiKey_Comma;
-    case 52: return ImGuiKey_Period;
-    case 53: return ImGuiKey_Slash;
-    default: break;
-    }
-
-    return ImGuiKey_None;
 }
 
 // Allow compilation with old Windows SDK. MinGW doesn't have default _WIN32_WINNT/WINVER versions.
@@ -655,8 +712,11 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandlerEx(HWND hwnd, UINT msg, WPA
             bd->MouseTrackedArea = area;
         }
         POINT mouse_pos = { (LONG)GET_X_LPARAM(lParam), (LONG)GET_Y_LPARAM(lParam) };
-        if (msg == WM_NCMOUSEMOVE) // WM_NCMOUSEMOVE are absolute coordinates.
-             ::ScreenToClient(hwnd, &mouse_pos);
+        bool want_absolute_pos = (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) != 0;
+        if (msg == WM_MOUSEMOVE && want_absolute_pos)    // WM_MOUSEMOVE are client-relative coordinates.
+            ::ClientToScreen(hwnd, &mouse_pos);
+        if (msg == WM_NCMOUSEMOVE && !want_absolute_pos) // WM_NCMOUSEMOVE are absolute coordinates.
+            ::ScreenToClient(hwnd, &mouse_pos);
         io.AddMouseSourceEvent(mouse_source);
         io.AddMousePosEvent((float)mouse_pos.x, (float)mouse_pos.y);
         return 0;
@@ -695,10 +755,7 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandlerEx(HWND hwnd, UINT msg, WPA
         if (msg == WM_RBUTTONDOWN || msg == WM_RBUTTONDBLCLK) { button = 1; }
         if (msg == WM_MBUTTONDOWN || msg == WM_MBUTTONDBLCLK) { button = 2; }
         if (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONDBLCLK) { button = (GET_XBUTTON_WPARAM(wParam) == XBUTTON1) ? 3 : 4; }
-        HWND hwnd_with_capture = ::GetCapture();
-        if (bd->MouseButtonsDown != 0 && hwnd_with_capture != hwnd) // Did we externally lost capture?
-            bd->MouseButtonsDown = 0;
-        if (bd->MouseButtonsDown == 0 && hwnd_with_capture == nullptr)
+        if (bd->MouseButtonsDown == 0 && ::GetCapture() == nullptr)
             ::SetCapture(hwnd); // Allow us to read mouse coordinates when dragging mouse outside of our window bounds.
         bd->MouseButtonsDown |= 1 << button;
         io.AddMouseSourceEvent(mouse_source);
@@ -776,9 +833,6 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandlerEx(HWND hwnd, UINT msg, WPA
     case WM_SETFOCUS:
     case WM_KILLFOCUS:
         io.AddFocusEvent(msg == WM_SETFOCUS);
-#ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
-        bd->XInputPacketNumber = 0; // FIXME: Technically, calling io.ClearInputKeys() directly would require this as well.
-#endif
         return 0;
     case WM_INPUTLANGCHANGE:
         ImGui_ImplWin32_UpdateKeyboardCodePage(io);
@@ -793,28 +847,10 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandlerEx(HWND hwnd, UINT msg, WPA
         else
         {
             wchar_t wch = 0;
-            ::MultiByteToWideChar(bd->KeyboardCodePage, MB_PRECOMPOSED, (char*)&wParam, 2, &wch, 1);
+            ::MultiByteToWideChar(bd->KeyboardCodePage, MB_PRECOMPOSED, (char*)&wParam, 1, &wch, 1);
             io.AddInputCharacter(wch);
         }
         return 0;
-    case WM_IME_COMPOSITION:
-    {
-        // Handling WM_IME_COMPOSITION ensure that WM_IME_CHAR value is correct even for MBCS apps.
-        // (see #9099, #3653 and https://stackoverflow.com/questions/77450354 topics) 
-        LRESULT result = ::DefWindowProcW(hwnd, msg, wParam, lParam);
-        return (lParam & GCS_RESULTSTR) ? 1 : result;
-    }
-    case WM_IME_CHAR:
-        if (::IsWindowUnicode(hwnd) == FALSE)
-        {
-            if (::IsDBCSLeadByte(HIBYTE(wParam)))
-                wParam = (WPARAM)MAKEWORD(HIBYTE(wParam), LOBYTE(wParam));
-            wchar_t wch = 0;
-            ::MultiByteToWideChar(bd->KeyboardCodePage, MB_PRECOMPOSED, (char*)&wParam, 2, &wch, 1);
-            io.AddInputCharacterUTF16(wch);
-            return 1;
-        }
-        return 0;
     case WM_SETCURSOR:
         // This is required to restore cursor when transitioning from e.g resize borders to client area.
         if (LOWORD(lParam) == HTCLIENT && ImGui_ImplWin32_UpdateMouseCursor(io, bd->LastMouseCursor))
@@ -826,6 +862,9 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandlerEx(HWND hwnd, UINT msg, WPA
             bd->WantUpdateHasGamepad = true;
 #endif
         return 0;
+    case WM_DISPLAYCHANGE:
+        bd->WantUpdateMonitors = true;
+        return 0;
     }
     return 0;
 }
@@ -838,7 +877,7 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandlerEx(HWND hwnd, UINT msg, WPA
 // - Your own app may already do this via a manifest or explicit calls. This is mostly useful for our examples/ apps.
 // - In theory we could call simple functions from Windows SDK such as SetProcessDPIAware(), SetProcessDpiAwareness(), etc.
 //   but most of the functions provided by Microsoft require Windows 8.1/10+ SDK at compile time and Windows 8/10+ at runtime,
-//   neither of which we want to require the user to have. So we dynamically select and load those functions to avoid dependencies.
+//   neither we want to require the user to have. So we dynamically select and load those functions to avoid dependencies.
 //---------------------------------------------------------------------------------------------------------
 // This is the scheme successfully used by GLFW (from which we borrowed some of the code) and other apps aiming to be highly portable.
 // ImGui_ImplWin32_EnableDpiAwareness() is just a helper called by main.cpp, we don't call it automatically.
@@ -851,9 +890,9 @@ static BOOL _IsWindowsVersionOrGreater(WORD major, WORD minor, WORD)
 {
     typedef LONG(WINAPI* PFN_RtlVerifyVersionInfo)(OSVERSIONINFOEXW*, ULONG, ULONGLONG);
     static PFN_RtlVerifyVersionInfo RtlVerifyVersionInfoFn = nullptr;
-    if (RtlVerifyVersionInfoFn == nullptr)
-        if (HMODULE ntdllModule = ::GetModuleHandleA("ntdll.dll"))
-            RtlVerifyVersionInfoFn = (PFN_RtlVerifyVersionInfo)GetProcAddress(ntdllModule, "RtlVerifyVersionInfo");
+	if (RtlVerifyVersionInfoFn == nullptr)
+		if (HMODULE ntdllModule = ::GetModuleHandleA("ntdll.dll"))
+			RtlVerifyVersionInfoFn = (PFN_RtlVerifyVersionInfo)GetProcAddress(ntdllModule, "RtlVerifyVersionInfo");
     if (RtlVerifyVersionInfoFn == nullptr)
         return FALSE;
 
@@ -861,10 +900,10 @@ static BOOL _IsWindowsVersionOrGreater(WORD major, WORD minor, WORD)
     ULONGLONG conditionMask = 0;
     versionInfo.dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
     versionInfo.dwMajorVersion = major;
-    versionInfo.dwMinorVersion = minor;
-    VER_SET_CONDITION(conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
-    VER_SET_CONDITION(conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
-    return (RtlVerifyVersionInfoFn(&versionInfo, VER_MAJORVERSION | VER_MINORVERSION, conditionMask) == 0) ? TRUE : FALSE;
+	versionInfo.dwMinorVersion = minor;
+	VER_SET_CONDITION(conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
+	VER_SET_CONDITION(conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
+	return (RtlVerifyVersionInfoFn(&versionInfo, VER_MAJORVERSION | VER_MINORVERSION, conditionMask) == 0) ? TRUE : FALSE;
 }
 
 #define _IsWindowsVistaOrGreater()   _IsWindowsVersionOrGreater(HIBYTE(0x0600), LOBYTE(0x0600), 0) // _WIN32_WINNT_VISTA
@@ -890,6 +929,10 @@ typedef DPI_AWARENESS_CONTEXT(WINAPI* PFN_SetThreadDpiAwarenessContext)(DPI_AWAR
 // Helper function to enable DPI awareness without setting up a manifest
 void ImGui_ImplWin32_EnableDpiAwareness()
 {
+    // Make sure monitors will be updated with latest correct scaling
+    if (ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData())
+        bd->WantUpdateMonitors = true;
+
     if (_IsWindows10OrGreater())
     {
         static HINSTANCE user32_dll = ::LoadLibraryA("user32.dll"); // Reference counted per-process
@@ -922,16 +965,16 @@ float ImGui_ImplWin32_GetDpiScaleForMonitor(void* monitor)
     UINT xdpi = 96, ydpi = 96;
     if (_IsWindows8Point1OrGreater())
     {
-        static HINSTANCE shcore_dll = ::LoadLibraryA("shcore.dll"); // Reference counted per-process
-        static PFN_GetDpiForMonitor GetDpiForMonitorFn = nullptr;
-        if (GetDpiForMonitorFn == nullptr && shcore_dll != nullptr)
+		static HINSTANCE shcore_dll = ::LoadLibraryA("shcore.dll"); // Reference counted per-process
+		static PFN_GetDpiForMonitor GetDpiForMonitorFn = nullptr;
+		if (GetDpiForMonitorFn == nullptr && shcore_dll != nullptr)
             GetDpiForMonitorFn = (PFN_GetDpiForMonitor)::GetProcAddress(shcore_dll, "GetDpiForMonitor");
-        if (GetDpiForMonitorFn != nullptr)
-        {
-            GetDpiForMonitorFn((HMONITOR)monitor, MDT_EFFECTIVE_DPI, &xdpi, &ydpi);
+		if (GetDpiForMonitorFn != nullptr)
+		{
+			GetDpiForMonitorFn((HMONITOR)monitor, MDT_EFFECTIVE_DPI, &xdpi, &ydpi);
             IM_ASSERT(xdpi == ydpi); // Please contact me if you hit this assert!
-            return (float)xdpi / 96.0f;
-        }
+			return xdpi / 96.0f;
+		}
     }
 #ifndef NOGDI
     const HDC dc = ::GetDC(nullptr);
@@ -940,7 +983,7 @@ float ImGui_ImplWin32_GetDpiScaleForMonitor(void* monitor)
     IM_ASSERT(xdpi == ydpi); // Please contact me if you hit this assert!
     ::ReleaseDC(nullptr, dc);
 #endif
-    return (float)xdpi / 96.0f;
+    return xdpi / 96.0f;
 }
 
 float ImGui_ImplWin32_GetDpiScaleForHwnd(void* hwnd)
@@ -989,6 +1032,381 @@ void ImGui_ImplWin32_EnableAlphaCompositing(void* hwnd)
     }
 }
 
+//---------------------------------------------------------------------------------------------------------
+// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
+// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
+// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
+//--------------------------------------------------------------------------------------------------------
+
+// Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
+struct ImGui_ImplWin32_ViewportData
+{
+    HWND    Hwnd;
+    HWND    HwndParent;
+    bool    HwndOwned;
+    DWORD   DwStyle;
+    DWORD   DwExStyle;
+
+    ImGui_ImplWin32_ViewportData() { Hwnd = HwndParent = nullptr; HwndOwned = false;  DwStyle = DwExStyle = 0; }
+    ~ImGui_ImplWin32_ViewportData() { IM_ASSERT(Hwnd == nullptr); }
+};
+
+static void ImGui_ImplWin32_GetWin32StyleFromViewportFlags(ImGuiViewportFlags flags, DWORD* out_style, DWORD* out_ex_style)
+{
+    if (flags & ImGuiViewportFlags_NoDecoration)
+        *out_style = WS_POPUP;
+    else
+        *out_style = WS_OVERLAPPEDWINDOW;
+
+    if (flags & ImGuiViewportFlags_NoTaskBarIcon)
+        *out_ex_style = WS_EX_TOOLWINDOW;
+    else
+        *out_ex_style = WS_EX_APPWINDOW;
+
+    if (flags & ImGuiViewportFlags_TopMost)
+        *out_ex_style |= WS_EX_TOPMOST;
+}
+
+static HWND ImGui_ImplWin32_GetHwndFromViewportID(ImGuiID viewport_id)
+{
+    if (viewport_id != 0)
+        if (ImGuiViewport* viewport = ImGui::FindViewportByID(viewport_id))
+            return (HWND)viewport->PlatformHandle;
+    return nullptr;
+}
+
+static void ImGui_ImplWin32_CreateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = IM_NEW(ImGui_ImplWin32_ViewportData)();
+    viewport->PlatformUserData = vd;
+
+    // Select style and parent window
+    ImGui_ImplWin32_GetWin32StyleFromViewportFlags(viewport->Flags, &vd->DwStyle, &vd->DwExStyle);
+    vd->HwndParent = ImGui_ImplWin32_GetHwndFromViewportID(viewport->ParentViewportId);
+
+    // Create window
+    RECT rect = { (LONG)viewport->Pos.x, (LONG)viewport->Pos.y, (LONG)(viewport->Pos.x + viewport->Size.x), (LONG)(viewport->Pos.y + viewport->Size.y) };
+    ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle);
+    vd->Hwnd = ::CreateWindowExW(
+        vd->DwExStyle, L"ImGui Platform", L"Untitled", vd->DwStyle,       // Style, class name, window name
+        rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,    // Window area
+        vd->HwndParent, nullptr, ::GetModuleHandle(nullptr), nullptr);          // Owner window, Menu, Instance, Param
+    vd->HwndOwned = true;
+    viewport->PlatformRequestResize = false;
+    viewport->PlatformHandle = viewport->PlatformHandleRaw = vd->Hwnd;
+
+    // Secondary viewports store their imgui context
+    ::SetPropA(vd->Hwnd, "IMGUI_CONTEXT", ImGui::GetCurrentContext());
+}
+
+static void ImGui_ImplWin32_DestroyWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData();
+    if (ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData)
+    {
+        if (::GetCapture() == vd->Hwnd)
+        {
+            // Transfer capture so if we started dragging from a window that later disappears, we'll still receive the MOUSEUP event.
+            ::ReleaseCapture();
+            ::SetCapture(bd->hWnd);
+        }
+        if (vd->Hwnd && vd->HwndOwned)
+            ::DestroyWindow(vd->Hwnd);
+        vd->Hwnd = nullptr;
+        IM_DELETE(vd);
+    }
+    viewport->PlatformUserData = viewport->PlatformHandle = nullptr;
+}
+
+static void ImGui_ImplWin32_ShowWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+
+    // ShowParent() also brings parent to front, which is not always desirable,
+    // so we temporarily disable parenting. (#7354)
+    if (vd->HwndParent != NULL)
+        ::SetWindowLongPtr(vd->Hwnd, GWLP_HWNDPARENT, (LONG_PTR)nullptr);
+
+    if (viewport->Flags & ImGuiViewportFlags_NoFocusOnAppearing)
+        ::ShowWindow(vd->Hwnd, SW_SHOWNA);
+    else
+        ::ShowWindow(vd->Hwnd, SW_SHOW);
+
+    // Restore
+    if (vd->HwndParent != NULL)
+        ::SetWindowLongPtr(vd->Hwnd, GWLP_HWNDPARENT, (LONG_PTR)vd->HwndParent);
+}
+
+static void ImGui_ImplWin32_UpdateWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+
+    // Update Win32 parent if it changed _after_ creation
+    // Unlike style settings derived from configuration flags, this is more likely to change for advanced apps that are manipulating ParentViewportID manually.
+    HWND new_parent = ImGui_ImplWin32_GetHwndFromViewportID(viewport->ParentViewportId);
+    if (new_parent != vd->HwndParent)
+    {
+        // Win32 windows can either have a "Parent" (for WS_CHILD window) or an "Owner" (which among other thing keeps window above its owner).
+        // Our Dear Imgui-side concept of parenting only mostly care about what Win32 call "Owner".
+        // The parent parameter of CreateWindowEx() sets up Parent OR Owner depending on WS_CHILD flag. In our case an Owner as we never use WS_CHILD.
+        // Calling ::SetParent() here would be incorrect: it will create a full child relation, alter coordinate system and clipping.
+        // Calling ::SetWindowLongPtr() with GWLP_HWNDPARENT seems correct although poorly documented.
+        // https://devblogs.microsoft.com/oldnewthing/20100315-00/?p=14613
+        vd->HwndParent = new_parent;
+        ::SetWindowLongPtr(vd->Hwnd, GWLP_HWNDPARENT, (LONG_PTR)vd->HwndParent);
+    }
+
+    // (Optional) Update Win32 style if it changed _after_ creation.
+    // Generally they won't change unless configuration flags are changed, but advanced uses (such as manually rewriting viewport flags) make this useful.
+    DWORD new_style;
+    DWORD new_ex_style;
+    ImGui_ImplWin32_GetWin32StyleFromViewportFlags(viewport->Flags, &new_style, &new_ex_style);
+
+    // Only reapply the flags that have been changed from our point of view (as other flags are being modified by Windows)
+    if (vd->DwStyle != new_style || vd->DwExStyle != new_ex_style)
+    {
+        // (Optional) Update TopMost state if it changed _after_ creation
+        bool top_most_changed = (vd->DwExStyle & WS_EX_TOPMOST) != (new_ex_style & WS_EX_TOPMOST);
+        HWND insert_after = top_most_changed ? ((viewport->Flags & ImGuiViewportFlags_TopMost) ? HWND_TOPMOST : HWND_NOTOPMOST) : 0;
+        UINT swp_flag = top_most_changed ? 0 : SWP_NOZORDER;
+
+        // Apply flags and position (since it is affected by flags)
+        vd->DwStyle = new_style;
+        vd->DwExStyle = new_ex_style;
+        ::SetWindowLong(vd->Hwnd, GWL_STYLE, vd->DwStyle);
+        ::SetWindowLong(vd->Hwnd, GWL_EXSTYLE, vd->DwExStyle);
+        RECT rect = { (LONG)viewport->Pos.x, (LONG)viewport->Pos.y, (LONG)(viewport->Pos.x + viewport->Size.x), (LONG)(viewport->Pos.y + viewport->Size.y) };
+        ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle); // Client to Screen
+        ::SetWindowPos(vd->Hwnd, insert_after, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, swp_flag | SWP_NOACTIVATE | SWP_FRAMECHANGED);
+        ::ShowWindow(vd->Hwnd, SW_SHOWNA); // This is necessary when we alter the style
+        viewport->PlatformRequestMove = viewport->PlatformRequestResize = true;
+    }
+}
+
+static ImVec2 ImGui_ImplWin32_GetWindowPos(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    POINT pos = { 0, 0 };
+    ::ClientToScreen(vd->Hwnd, &pos);
+    return ImVec2((float)pos.x, (float)pos.y);
+}
+
+static void ImGui_ImplWin32_UpdateWin32StyleFromWindow(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    vd->DwStyle = ::GetWindowLongW(vd->Hwnd, GWL_STYLE);
+    vd->DwExStyle = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE);
+}
+
+static void ImGui_ImplWin32_SetWindowPos(ImGuiViewport* viewport, ImVec2 pos)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    RECT rect = { (LONG)pos.x, (LONG)pos.y, (LONG)pos.x, (LONG)pos.y };
+    if (viewport->Flags & ImGuiViewportFlags_OwnedByApp)
+        ImGui_ImplWin32_UpdateWin32StyleFromWindow(viewport); // Not our window, poll style before using
+    ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle);
+    ::SetWindowPos(vd->Hwnd, nullptr, rect.left, rect.top, 0, 0, SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE);
+}
+
+static ImVec2 ImGui_ImplWin32_GetWindowSize(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    RECT rect;
+    ::GetClientRect(vd->Hwnd, &rect);
+    return ImVec2(float(rect.right - rect.left), float(rect.bottom - rect.top));
+}
+
+static void ImGui_ImplWin32_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    RECT rect = { 0, 0, (LONG)size.x, (LONG)size.y };
+    if (viewport->Flags & ImGuiViewportFlags_OwnedByApp)
+        ImGui_ImplWin32_UpdateWin32StyleFromWindow(viewport); // Not our window, poll style before using
+    ::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle); // Client to Screen
+    ::SetWindowPos(vd->Hwnd, nullptr, 0, 0, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
+}
+
+static void ImGui_ImplWin32_SetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    ::BringWindowToTop(vd->Hwnd);
+    ::SetForegroundWindow(vd->Hwnd);
+    ::SetFocus(vd->Hwnd);
+}
+
+static bool ImGui_ImplWin32_GetWindowFocus(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    return ::GetForegroundWindow() == vd->Hwnd;
+}
+
+static bool ImGui_ImplWin32_GetWindowMinimized(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    return ::IsIconic(vd->Hwnd) != 0;
+}
+
+static void ImGui_ImplWin32_SetWindowTitle(ImGuiViewport* viewport, const char* title)
+{
+    // ::SetWindowTextA() doesn't properly handle UTF-8 so we explicitely convert our string.
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    int n = ::MultiByteToWideChar(CP_UTF8, 0, title, -1, nullptr, 0);
+    ImVector<wchar_t> title_w;
+    title_w.resize(n);
+    ::MultiByteToWideChar(CP_UTF8, 0, title, -1, title_w.Data, n);
+    ::SetWindowTextW(vd->Hwnd, title_w.Data);
+}
+
+static void ImGui_ImplWin32_SetWindowAlpha(ImGuiViewport* viewport, float alpha)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    IM_ASSERT(alpha >= 0.0f && alpha <= 1.0f);
+    if (alpha < 1.0f)
+    {
+        DWORD ex_style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) | WS_EX_LAYERED;
+        ::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, ex_style);
+        ::SetLayeredWindowAttributes(vd->Hwnd, 0, (BYTE)(255 * alpha), LWA_ALPHA);
+    }
+    else
+    {
+        DWORD ex_style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) & ~WS_EX_LAYERED;
+        ::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, ex_style);
+    }
+}
+
+static float ImGui_ImplWin32_GetWindowDpiScale(ImGuiViewport* viewport)
+{
+    ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
+    IM_ASSERT(vd->Hwnd != 0);
+    return ImGui_ImplWin32_GetDpiScaleForHwnd(vd->Hwnd);
+}
+
+// FIXME-DPI: Testing DPI related ideas
+static void ImGui_ImplWin32_OnChangedViewport(ImGuiViewport* viewport)
+{
+    (void)viewport;
+#if 0
+    ImGuiStyle default_style;
+    //default_style.WindowPadding = ImVec2(0, 0);
+    //default_style.WindowBorderSize = 0.0f;
+    //default_style.ItemSpacing.y = 3.0f;
+    //default_style.FramePadding = ImVec2(0, 0);
+    default_style.ScaleAllSizes(viewport->DpiScale);
+    ImGuiStyle& style = ImGui::GetStyle();
+    style = default_style;
+#endif
+}
+
+namespace ImGui { extern ImGuiIO& GetIOEx(ImGuiContext*); extern ImGuiPlatformIO& GetPlatformIOEx(ImGuiContext*); }
+
+static LRESULT CALLBACK ImGui_ImplWin32_WndProcHandler_PlatformWindow(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
+{
+    // Allow secondary viewport WndProc to be called regardless of current context
+    ImGuiContext* ctx = (ImGuiContext*)::GetPropA(hWnd, "IMGUI_CONTEXT");
+    if (ctx == NULL)
+        return DefWindowProc(hWnd, msg, wParam, lParam); // unlike ImGui_ImplWin32_WndProcHandler() we are called directly by Windows, we can't just return 0.
+
+    ImGuiIO& io = ImGui::GetIOEx(ctx);
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIOEx(ctx);
+    LRESULT result = 0;
+    if (ImGui_ImplWin32_WndProcHandlerEx(hWnd, msg, wParam, lParam, io))
+        result = true;
+    else if (ImGuiViewport* viewport = ImGui_ImplWin32_FindViewportByPlatformHandle(platform_io, hWnd))
+    {
+        switch (msg)
+        {
+        case WM_CLOSE:
+            viewport->PlatformRequestClose = true;
+            break;
+        case WM_MOVE:
+            viewport->PlatformRequestMove = true;
+            break;
+        case WM_SIZE:
+            viewport->PlatformRequestResize = true;
+            break;
+        case WM_MOUSEACTIVATE:
+            if (viewport->Flags & ImGuiViewportFlags_NoFocusOnClick)
+                result = MA_NOACTIVATE;
+            break;
+        case WM_NCHITTEST:
+            // Let mouse pass-through the window. This will allow the backend to call io.AddMouseViewportEvent() correctly. (which is optional).
+            // The ImGuiViewportFlags_NoInputs flag is set while dragging a viewport, as want to detect the window behind the one we are dragging.
+            // If you cannot easily access those viewport flags from your windowing/event code: you may manually synchronize its state e.g. in
+            // your main loop after calling UpdatePlatformWindows(). Iterate all viewports/platform windows and pass the flag to your windowing system.
+            if (viewport->Flags & ImGuiViewportFlags_NoInputs)
+                result = HTTRANSPARENT;
+            break;
+        }
+    }
+    if (result == 0)
+        result = DefWindowProc(hWnd, msg, wParam, lParam);
+    return result;
+}
+
+static void ImGui_ImplWin32_InitMultiViewportSupport(bool platform_has_own_dc)
+{
+    WNDCLASSEXW wcex;
+    wcex.cbSize = sizeof(WNDCLASSEXW);
+    wcex.style = CS_HREDRAW | CS_VREDRAW | (platform_has_own_dc ? CS_OWNDC : 0);
+    wcex.lpfnWndProc = ImGui_ImplWin32_WndProcHandler_PlatformWindow;
+    wcex.cbClsExtra = 0;
+    wcex.cbWndExtra = 0;
+    wcex.hInstance = ::GetModuleHandle(nullptr);
+    wcex.hIcon = nullptr;
+    wcex.hCursor = nullptr;
+    wcex.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1);
+    wcex.lpszMenuName = nullptr;
+    wcex.lpszClassName = L"ImGui Platform";
+    wcex.hIconSm = nullptr;
+    ::RegisterClassExW(&wcex);
+
+    ImGui_ImplWin32_UpdateMonitors();
+
+    // Register platform interface (will be coupled with a renderer interface)
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+    platform_io.Platform_CreateWindow = ImGui_ImplWin32_CreateWindow;
+    platform_io.Platform_DestroyWindow = ImGui_ImplWin32_DestroyWindow;
+    platform_io.Platform_ShowWindow = ImGui_ImplWin32_ShowWindow;
+    platform_io.Platform_SetWindowPos = ImGui_ImplWin32_SetWindowPos;
+    platform_io.Platform_GetWindowPos = ImGui_ImplWin32_GetWindowPos;
+    platform_io.Platform_SetWindowSize = ImGui_ImplWin32_SetWindowSize;
+    platform_io.Platform_GetWindowSize = ImGui_ImplWin32_GetWindowSize;
+    platform_io.Platform_SetWindowFocus = ImGui_ImplWin32_SetWindowFocus;
+    platform_io.Platform_GetWindowFocus = ImGui_ImplWin32_GetWindowFocus;
+    platform_io.Platform_GetWindowMinimized = ImGui_ImplWin32_GetWindowMinimized;
+    platform_io.Platform_SetWindowTitle = ImGui_ImplWin32_SetWindowTitle;
+    platform_io.Platform_SetWindowAlpha = ImGui_ImplWin32_SetWindowAlpha;
+    platform_io.Platform_UpdateWindow = ImGui_ImplWin32_UpdateWindow;
+    platform_io.Platform_GetWindowDpiScale = ImGui_ImplWin32_GetWindowDpiScale; // FIXME-DPI
+    platform_io.Platform_OnChangedViewport = ImGui_ImplWin32_OnChangedViewport; // FIXME-DPI
+
+    // Register main window handle (which is owned by the main application, not by us)
+    // This is mostly for simplicity and consistency, so that our code (e.g. mouse handling etc.) can use same logic for main and secondary viewports.
+    ImGuiViewport* main_viewport = ImGui::GetMainViewport();
+    ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData();
+    ImGui_ImplWin32_ViewportData* vd = IM_NEW(ImGui_ImplWin32_ViewportData)();
+    vd->Hwnd = bd->hWnd;
+    vd->HwndOwned = false;
+    main_viewport->PlatformUserData = vd;
+}
+
+static void ImGui_ImplWin32_ShutdownMultiViewportSupport()
+{
+    ::UnregisterClass(_T("ImGui Platform"), ::GetModuleHandle(nullptr));
+    ImGui::DestroyPlatformWindows();
+}
+
 //---------------------------------------------------------------------------------------------------------
 
 #if defined(__GNUC__)

backends/imgui_impl_win32.h

@@ -5,8 +5,9 @@
 //  [X] Platform: Clipboard support (for Win32 this is actually part of core dear imgui)
 //  [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen/Pen.
 //  [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy VK_* values are obsolete since 1.87 and not supported since 1.91.5]
-//  [X] Platform: Gamepad support.
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
 //  [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+//  [X] Platform: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
 
 // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
 // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@@ -26,7 +27,7 @@ IMGUI_IMPL_API bool     ImGui_ImplWin32_InitForOpenGL(void* hwnd);
 IMGUI_IMPL_API void     ImGui_ImplWin32_Shutdown();
 IMGUI_IMPL_API void     ImGui_ImplWin32_NewFrame();
 
-// Win32 message handler your application needs to call.
+// Win32 message handler your application need to call.
 // - Intentionally commented out in a '#if 0' block to avoid dragging dependencies on <windows.h> from this helper.
 // - You should COPY the line below into your .cpp code to forward declare the function and then you can call it.
 // - Call from your application's message handler. Keep calling your message handler unless this function returns TRUE.
@@ -40,7 +41,7 @@ extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg
 // - Your own app may already do this via a manifest or explicit calls. This is mostly useful for our examples/ apps.
 // - In theory we could call simple functions from Windows SDK such as SetProcessDPIAware(), SetProcessDpiAwareness(), etc.
 //   but most of the functions provided by Microsoft require Windows 8.1/10+ SDK at compile time and Windows 8/10+ at runtime,
-//   neither of which we want to require the user to have. So we dynamically select and load those functions to avoid dependencies.
+//   neither we want to require the user to have. So we dynamically select and load those functions to avoid dependencies.
 IMGUI_IMPL_API void     ImGui_ImplWin32_EnableDpiAwareness();
 IMGUI_IMPL_API float    ImGui_ImplWin32_GetDpiScaleForHwnd(void* hwnd);       // HWND hwnd
 IMGUI_IMPL_API float    ImGui_ImplWin32_GetDpiScaleForMonitor(void* monitor); // HMONITOR monitor

backends/sdlgpu3/build_instructions.txt

@@ -34,8 +34,6 @@ Instructions to rebuild imgui_impl_sdlgpu3_shaders.h
     xcrun -sdk macosx metallib -o vertex.metallib -c vertex.ir
     xcrun -sdk macosx metallib -o fragment.metallib -c fragment.ir
 
-    note: use .metal outputs for updating msl_vertex / msl_fragment variables, and use .metallib outputs for metallib_vertex / metallib_fragment variables
-
     Proceed to step 4
 
 

backends/vulkan/glsl_shader.frag

@@ -1,8 +1,7 @@
 #version 450 core
 layout(location = 0) out vec4 fColor;
 
-layout(set=0, binding=0) uniform texture2D _Texture;
-layout(set=1, binding=0) uniform sampler _Sampler;
+layout(set=0, binding=0) uniform sampler2D sTexture;
 
 layout(location = 0) in struct {
     vec4 Color;
@@ -11,5 +10,5 @@ layout(location = 0) in struct {
 
 void main()
 {
-    fColor = In.Color * texture(sampler2D(_Texture, _Sampler), In.UV.st);
+    fColor = In.Color * texture(sTexture, In.UV.st);
 }

docs/BACKENDS.md

@@ -1,33 +1,18 @@
 _(You may browse this at https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md or view this file with any Markdown viewer)_
 
-# Dear ImGui: Backends
+## Dear ImGui: Backends
 
-## Index
-
-- [Introduction](#introduction)
-   - [Getting Started](#getting-started)
-   - [What are Backends?](#what-are-backends)
-- [Using standard Backends](#using-standard-backends)
-- [Using third-party Backends](#using-third-party-backends)
-- [Writing your own Backend](#writing-your-own-backend)
-  - [Using a custom engine?](#using-a-custom-engine)
-  - [Platform: Implementing your Platform Backend](#platform-implementing-your-platform-backend)
-  - [Rendering: Implementing your RenderDrawData function](#rendering-implementing-your-renderdrawdata-function)
-  - [Rendering: Adding support for `ImGuiBackendFlags_RendererHasTextures` (1.92+)](#rendering-adding-support-for-imguibackendflags_rendererhastextures-192)
-
-## Introduction
-
-### Getting Started
+### Integrating backends
 
 💡 The **[Getting Started](https://github.com/ocornut/imgui/wiki/Getting-Started) wiki guide** has examples of how to integrate Dear ImGui into an existing application.
 <BR> The [EXAMPLES.MD](https://github.com/ocornut/imgui/blob/master/docs/EXAMPLES.md) documentation may also be worth a read.
 
-### What are Backends?
+### What are backends?
 
 Dear ImGui is highly portable and only requires a few things to run and render, typically:
 
  - Required: providing mouse/keyboard inputs (fed into the `ImGuiIO` structure).
- - Required: creating, updating and destroying textures.
+ - Required: uploading the font atlas texture into graphics memory.
  - Required: rendering indexed textured triangles with a clipping rectangle.
 
  Extra features are opt-in, our backends try to support as many as possible:
@@ -49,13 +34,13 @@ and the backends which we are describing here (backends/ folder).
 - You should be able to write backends for pretty much any platform and any 3D graphics API.
   e.g. you can get creative and use software rendering or render remotely on a different machine.
 
-## Using standard Backends
+### Standard backends
 
 **The [backends/](https://github.com/ocornut/imgui/blob/master/backends) folder contains backends for popular platforms/graphics API, which you can use in
 your application or engine to easily integrate Dear ImGui.** Each backend is typically self-contained in a pair of files: imgui_impl_XXXX.cpp + imgui_impl_XXXX.h.
 
 - The 'Platform' backends are in charge of: mouse/keyboard/gamepad inputs, cursor shape, timing, and windowing.<BR>
-  e.g. Windows ([imgui_impl_win32.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_win32.cpp)), SDL3 ([imgui_impl_sdl3.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_sdl3.cpp)), GLFW ([imgui_impl_glfw.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_glfw.cpp)), etc.
+  e.g. Windows ([imgui_impl_win32.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_win32.cpp)), GLFW ([imgui_impl_glfw.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_glfw.cpp)), SDL2 ([imgui_impl_sdl2.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_sdl2.cpp)), etc.
 
 - The 'Renderer' backends are in charge of: creating atlas texture, and rendering imgui draw data.<BR>
   e.g. DirectX11 ([imgui_impl_dx11.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_dx11.cpp)), OpenGL/WebGL ([imgui_impl_opengl3.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_opengl3.cpp)), Vulkan ([imgui_impl_vulkan.cpp](https://github.com/ocornut/imgui/blob/master/backends/imgui_impl_vulkan.cpp)), etc.
@@ -68,42 +53,44 @@ For example, the [example_win32_directx11](https://github.com/ocornut/imgui/tree
 
 **Once Dear ImGui is setup and running, run and refer to `ImGui::ShowDemoWindow()` in imgui_demo.cpp for usage of the end-user API.**
 
-### List of standard Backends
+### List of backends
 
 In the [backends/](https://github.com/ocornut/imgui/blob/master/backends) folder:
 
 List of Platforms Backends:
 
-    imgui_impl_android.cpp      ; Android native app API
-    imgui_impl_glfw.cpp         ; GLFW (Windows, macOS, Linux, etc.) http://www.glfw.org/
-    imgui_impl_osx.mm           ; macOS native API (not as feature complete as glfw/sdl backends)
-    imgui_impl_sdl2.cpp         ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org
-    imgui_impl_sdl3.cpp         ; SDL3 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org
-    imgui_impl_win32.cpp        ; Win32 native API (Windows)
-    imgui_impl_glut.cpp         ; GLUT/FreeGLUT (this is prehistoric software and absolutely not recommended today!)
+    imgui_impl_android.cpp    ; Android native app API
+    imgui_impl_glfw.cpp       ; GLFW (Windows, macOS, Linux, etc.) http://www.glfw.org/
+    imgui_impl_osx.mm         ; macOS native API (not as feature complete as glfw/sdl backends)
+    imgui_impl_sdl2.cpp       ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org
+    imgui_impl_sdl3.cpp       ; SDL3 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org (*EXPERIMENTAL UNTIL SDL3 IS RELEASED*)
+    imgui_impl_win32.cpp      ; Win32 native API (Windows)
+    imgui_impl_glut.cpp       ; GLUT/FreeGLUT (this is prehistoric software and absolutely not recommended today!)
 
 List of Renderer Backends:
 
-    imgui_impl_dx9.cpp          ; DirectX9
-    imgui_impl_dx10.cpp         ; DirectX10
-    imgui_impl_dx11.cpp         ; DirectX11
-    imgui_impl_dx12.cpp         ; DirectX12
-    imgui_impl_metal.mm         ; Metal (ObjC or C++)
-    imgui_impl_opengl2.cpp      ; OpenGL 2 (legacy fixed pipeline. Don't use with modern OpenGL code!)
-    imgui_impl_opengl3.cpp      ; OpenGL 3/4, OpenGL ES 2/3, WebGL
-    imgui_impl_sdlgpu3.cpp      ; SDL_GPU (portable 3D graphics API of SDL3)
+    imgui_impl_dx9.cpp        ; DirectX9
+    imgui_impl_dx10.cpp       ; DirectX10
+    imgui_impl_dx11.cpp       ; DirectX11
+    imgui_impl_dx12.cpp       ; DirectX12
+    imgui_impl_metal.mm       ; Metal (with ObjC)
+    imgui_impl_opengl2.cpp    ; OpenGL 2 (legacy, fixed pipeline <- don't use with modern OpenGL context)
+    imgui_impl_opengl3.cpp    ; OpenGL 3/4, OpenGL ES 2, OpenGL ES 3 (modern programmable pipeline)
     imgui_impl_sdlrenderer2.cpp ; SDL_Renderer (optional component of SDL2 available from SDL 2.0.18+)
-    imgui_impl_sdlrenderer3.cpp ; SDL_Renderer (optional component of SDL3. Prefer using SDL_GPU!).
-    imgui_impl_vulkan.cpp       ; Vulkan
-    imgui_impl_wgpu.cpp         ; WebGPU (web + desktop)
+    imgui_impl_sdlrenderer3.cpp ; SDL_Renderer (optional component of SDL3 available from SDL 3.0.0+)
+    imgui_impl_vulkan.cpp     ; Vulkan
+    imgui_impl_wgpu.cpp       ; WebGPU (web and desktop)
 
 List of high-level Frameworks Backends (combining Platform + Renderer):
 
     imgui_impl_allegro5.cpp
-    imgui_impl_null.cpp
 
 Emscripten is also supported!
-The SDL2+GL, SDL3+GL, GLFW+GL and GLFW+WebGPU examples are all ready to build and run with Emscripten.
+The SDL+GL, GLFW+GL and GLFW+WebGPU examples are all ready to build and run with Emscripten.
+
+### Backends for third-party frameworks, graphics API or other languages
+
+See https://github.com/ocornut/imgui/wiki/Bindings for the full list (e.g. Adventure Game Studio, Cinder, Cocos2d-x, Game Maker Studio2, Godot, LÖVE+LUA, Magnum, Monogame, Ogre, openFrameworks, OpenSceneGraph, SFML, Sokol, Unity, Unreal Engine and many others).
 
 ### Recommended Backends
 
@@ -111,32 +98,18 @@ If you are not sure which backend to use, the recommended platform/frameworks fo
 
 |Library |Website |Backend |Note |
 |--------|--------|--------|-----|
-| SDL3 | https://www.libsdl.org | imgui_impl_sdl3.cpp | Recommended |
-| SDL2 | https://www.libsdl.org | imgui_impl_sdl2.cpp | |
 | GLFW | https://github.com/glfw/glfw | imgui_impl_glfw.cpp | |
+| SDL2 | https://www.libsdl.org | imgui_impl_sdl2.cpp | |
 | Sokol | https://github.com/floooh/sokol | [util/sokol_imgui.h](https://github.com/floooh/sokol/blob/master/util/sokol_imgui.h) | Lower-level than GLFW/SDL |
 
-If your application runs on Windows or if you are using multi-viewport, the win32 backend handles some details a little better than other backends.
-
-## Using third-party Backends
-
-See https://github.com/ocornut/imgui/wiki/Bindings for the full list (e.g. Adventure Game Studio, Cinder, Cocos2d-x, Game Maker Studio2, Godot, LÖVE+LUA, Magnum, Monogame, Ogre, openFrameworks, OpenSceneGraph, SFML, Sokol, Unity, Unreal Engine and many others).
-
-## Writing your own Backend
 
 ### Using a custom engine?
 
 You will likely be tempted to start by rewrite your own backend using your own custom/high-level facilities...<BR>
 Think twice!
 
-TL;DR;
-- Writing your own Renderer Backend is easy.
-- Writing your own Platform Backend is harder and you are more likely to introduce bugs.
-- **It is unlikely you will add value to your project by creating your own backend.**
-
-**Consider using the existing backends as-is**.
+If you are new to Dear ImGui, first try using the existing backends as-is.
 You will save lots of time integrating the library.
-Standard backends are battle-tested and handle subtleties that you are likely to implement incorrectly.
 You can LATER decide to rewrite yourself a custom backend if you really need to.
 In most situations, custom backends have fewer features and more bugs than the standard backends we provide.
 If you want portability, you can use multiple backends and choose between them either at compile time
@@ -158,221 +131,16 @@ Suggestion: try using a non-portable backend first (e.g. win32 + underlying grap
 your desktop builds working first. This will get you running faster and get your acquainted with
 how Dear ImGui works and is setup. You can then rewrite a custom backend using your own engine API...
 
+Generally:
+It is unlikely you will add value to your project by creating your own backend.
+
 Also:
 The [multi-viewports feature](https://github.com/ocornut/imgui/wiki/Multi-Viewports) of the 'docking' branch allows
 Dear ImGui windows to be seamlessly detached from the main application window. This is achieved using an
 extra layer to the Platform and Renderer backends, which allows Dear ImGui to communicate platform-specific
 requests such as: "create an additional OS window", "create a render context", "get the OS position of this
-window", but some things are more difficult "find OS window under mouse position BUT with some windows marked as passthrough". See 'ImGuiPlatformIO' for details.
+window" etc. See 'ImGuiPlatformIO' for details.
 Supporting the multi-viewports feature correctly using 100% of your own abstractions is more difficult
 than supporting single-viewport.
 If you decide to use unmodified imgui_impl_XXXX.cpp files, you can automatically benefit from
 improvements and fixes related to viewports and platform windows without extra work on your side.
-
-### Platform: Implementing your Platform Backend
-
-The Platform backends in impl_impl_XXX.cpp files contain many implementations.
-
-**In your `ImGui_ImplXXX_Init()` function:**
-- You can allocate your backend data and use `io.BackendPlatformUserData` to store/retrieve it later.
-- Set `io.BackendPlatformName` to a name `"imgui_impl_xxxx"` which will be available in e.g. About box.
-- Set `io.BackendPlatformUserData` to your backend data.
-- Set `io.BackendFlags` with supported optional features:
-  - `ImGuiBackendFlags_HasGamepad`: supports gamepad and currently has one connected.
-  - `ImGuiBackendFlags_HasMouseCursors`: supports honoring GetMouseCursor() value to change the OS cursor shape.
-  - `ImGuiBackendFlags_HasSetMousePos`: supports io.WantSetMousePos requests to reposition the OS mouse position (only used if io.ConfigNavMoveSetMousePos is set).
-  - `ImGuiBackendFlags_PlatformHasViewports` supports multiple viewports. (multi-viewports only)
-  - `ImGuiBackendFlags_HasMouseHoveredViewport` supports calling io.AddMouseViewportEvent() with the viewport under the mouse. IF POSSIBLE, ignore viewports with the ImGuiViewportFlags_NoInputs flag. If this cannot be done, Dear ImGui needs to use a flawed heuristic to find the viewport under mouse position, as it doesn't know about foreign windows. (multi-viewports only)
-
-**In your `ImGui_ImplXXX_NewFrame()` function:**
-- Set `io.DeltaTime` to the time elapsed (in seconds) since last frame.
-- Set `io.DisplaySize` to your window size.
-- Set `io.DisplayFrameBufferSize` to your window pixel density (macOS/iOS only).
-- Update mouse cursor shape is supported.
-
-**In your `ImGui_ImplXXX_NewFrame()` function or event handlers:**
-- **Mouse Support**
-  - Use `io.AddMousePosEvent()`, `io.AddMouseButtonEvent()`, `io.AddMouseWheelEvent()` to pass mouse events.
-  - Use `io.AddMouseSourceEvent()` if you are able to distinguish Mouse from TouchScreen from Pen inputs. TouchScreen and Pen inputs requires different logic for some Dear ImGui features.
-  - Use `io.AddMouseViewportEvent()` to specify which viewport/OS window is being hovered by the mouse. Read instructions carefully as this is not as simple as it seems! (multi-viewports only)
-- **Keyboard Support**
-  - Use `io.AddKeyEvent()` to pass key events.
-  - Use `io.AddInputCharacter()` to pass text/character events.
-- **Gamepad Support**
-  - Use `io.AddKeyEvent()` and `io.AddKeyAnalogEvent()` to pass gamepad events, using `ImGuiKey_GamepadXXX` values.
-- **Miscellaneous**
-  - Clipboard Support: setup `Platform_GetClipboardTextFn()`, `Platform_SetClipboardTextFn()` handlers in `ImGuiPlatformIO`.
-  - Open in Shell support: setup `Platform_OpenInShellFn()` handler in `ImGuiPlatformIO`.
-  - IME Support: setup `Platform_SetImeDataFn()` handler in `ImGuiPlatformIO`.
-  - Use `io.AddFocusEvent()` to notify when application window gets focused/unfocused.
-- **Multi-viewport Support**
-  - Update monitor list if supported.
-  - Setup all required handlers in `ImGuiPlatformIO` to create/destroy/move/resize/title/focus/etc. windows.
-
-### Rendering: Implementing your RenderDrawData function
-
-Note: set `ImGuiBackendFlags_RendererHasVtxOffset` to signify your backend can handle rendering with a vertex offset (`ImDrawCmd::VtxOffset` field).
-Otherwise, rendering will be limited to 64K vertices per window, which may be limiting for advanced plot.
-As an alternative, you may also use `#define ImDrawIdx unsigned int` in your `imconfig.h` file to support 32-bit indices.
-
-```cpp
-void MyImGuiBackend_RenderDrawData(ImDrawData* draw_data)
-{
-    // TODO: Update textures.
-    // - Most of the times, the list will have 1 element with an OK status, aka nothing to do.
-    // - This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates.
-    if (draw_data->Textures != nullptr)
-        for (ImTextureData* tex : *draw_data->Textures)
-            if (tex->Status != ImTextureStatus_OK)
-                MyImGuiBackend_UpdateTexture(tex);
-
-    // TODO: Setup render state:
-    // - Alpha-blending enabled
-    // - No backface culling
-    // - No depth testing, no depth writing
-    // - Scissor enabled
-    MyEngineSetupenderState();
-
-    // TODO: Setup texture sampling state
-    // - Sample with bilinear filtering (NOT point/nearest filtering).
-    // - Use 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines;' to allow point/nearest filtering.
-
-    // TODO: Setup viewport covering draw_data->DisplayPos to draw_data->DisplayPos + draw_data->DisplaySize
-
-    // TODO: Setup orthographic projection matrix cover draw_data->DisplayPos to draw_data->DisplayPos + draw_data->DisplaySize
-
-    // TODO: Setup shader: vertex { float2 pos, float2 uv, u32 color }, fragment shader sample color from 1 texture, multiply by vertex color.
-
-    // Render command lists
-    ImVec2 clip_off = draw_data->DisplayPos;
-    ImVec2 clip_scale = draw_data->FramebufferScale;
-    for (const ImDrawList* draw_list : draw_data->CmdLists)
-    {
-        const ImDrawVert* vtx_buffer = cmd_list->VtxBuffer.Data;  // vertex buffer generated by Dear ImGui
-        const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data;   // index buffer generated by Dear ImGui
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
-        {
-            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
-            if (pcmd->UserCallback)
-            {
-                if (pcmd->UserCallback == platform_io.DrawCallback_ResetRenderState)
-                    MyEngineSetupSenderState();
-                else
-                    pcmd->UserCallback(cmd_list, pcmd);
-            }
-            else
-            {
-                // Project scissor/clipping rectangles into framebuffer space
-                // - Clipping coordinates are provided in imgui coordinates space:
-                //   - For a given viewport, draw_data->DisplayPos == viewport->Pos and draw_data->DisplaySize == viewport->Size
-                //   - In a single viewport application, draw_data->DisplayPos == (0,0) and draw_data->DisplaySize == io.DisplaySize, but always use GetMainViewport()->Pos/Size instead of hardcoding those values.
-                //   - In the interest of supporting multi-viewport applications (see 'docking' branch on github),
-                //     always subtract draw_data->DisplayPos from clipping bounds to convert them to your viewport space.
-                // - Note that pcmd->ClipRect contains Min+Max bounds. Some graphics API may use Min+Max, other may use Min+Size (size being Max-Min)
-                ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
-                ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y);
-                if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
-                    continue;
-
-                // We are using scissoring to clip some objects. All low-level graphics API should support it.
-                // - If your engine doesn't support scissoring yet, you may ignore this at first. You will get some small glitches
-                //   (some elements visible outside their bounds) but you can fix that once everything else works!
-                MyEngineSetScissor(clip_min.x, clip_min.y, clip_max.x, clip_max.y);
-
-                // The texture for the draw call is specified by pcmd->GetTexID().
-                // The vast majority of draw calls will use the Dear ImGui texture atlas, which value you have set yourself during initialization.
-                MyEngineBindTexture((MyTexture*)pcmd->GetTexID());
-
-                // Render 'pcmd->ElemCount/3' indexed triangles.
-                // By default the indices ImDrawIdx are 16-bit, you can change them to 32-bit in imconfig.h if your engine doesn't support 16-bit indices.
-                MyEngineDrawIndexedTriangles(pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer + pcmd->IdxOffset, vtx_buffer, pcmd->VtxOffset);
-            }
-        }
-    }
-}
-```
-
-### Rendering: Adding support for `ImGuiBackendFlags_RendererHasTextures` (1.92+)
-
-Version [1.92.0](https://github.com/ocornut/imgui/releases/tag/v1.92.0) (June 2025), added texture support in Rendering Backends, which is the backbone for supporting dynamic font scaling among other things.
-
-**In order to move forward and take advantage of all new features, support for `ImGuiBackendFlags_RendererHasTextures` will likely be REQUIRED for all backends before June 2026.**
-
-`ImFontAtlas` functions such as `Build()`, `GetTexDataAsRGBA32()`, `GetTexDataAsAlpha8()`, `SetTexID()`, `IsBuilt()` were obsoleted in favor if iterating a `Textures[]` array and updating their state when requested by Dear ImGui.
-
-**TD;DR: List of commits which added support for `ImGuiBackendFlags_RendererHasTextures` in standard backends:**
-
-- Allegro5: [ee8941e](https://github.com/ocornut/imgui/commit/ee8941e) (+35 lines)
-- DirectX9: [75efba7](https://github.com/ocornut/imgui/commit/75efba7) (+48 lines)
-- DirectX10: [2d2b1bc](https://github.com/ocornut/imgui/commit/2d2b1bc) (+40 lines)
-- DirectX11: [372fd27](https://github.com/ocornut/imgui/commit/372fd27) (+40 lines)
-- DirectX12: [eefe5d5](https://github.com/ocornut/imgui/commit/eefe5d5) (+87 lines)
-- Metal: [26c017d](https://github.com/ocornut/imgui/commit/26c017d) (+55 lines)
-- OpenGL Legacy: [0430c55](https://github.com/ocornut/imgui/commit/0430c55) (+25 lines)
-- OpenGL3/WebGL/ES: [dbb91a5](https://github.com/ocornut/imgui/commit/dbb91a5) (+47 lines)
-- SDL_Renderer2: [9fa65cd](https://github.com/ocornut/imgui/commit/9fa65cd) (+20 lines)
-- SDL_Renderer3: [e538883](https://github.com/ocornut/imgui/commit/e538883) (+19 lines)
-- SDL_GPU: [16fe666](https://github.com/ocornut/imgui/commit/16fe666) (+41 lines)
-- Vulkan: [abe294b](https://github.com/ocornut/imgui/commit/abe294b) (+33 lines)
-- WGPU: [571dae9](https://github.com/ocornut/imgui/commit/571dae9) (+30 lines)
-
-**Instructions:**
-
-- Set `ImGuiBackendFlags_RendererHasTextures` to signify your backend can handle the feature.
-- During rendering, e.g. in your RenderDrawData function, iterate `ImDrawData->Textures` array and process all textures.
-- During shutdown, iterate the `ImGui::GetPlatformIO().Textures` and destroy all textures.
-- (Both arrays are `ImVector<ImTextureData*>`. They are only in different location because: to allow advanced users to perform multi-threaded rendering, we store a pointer to the texture list in ImDrawData, with the aim that multi-threaded rendering users replace it with their own pointer.)
-
-Pseudo-code for processing a texture:
-```cpp
-if (draw_data->Textures != nullptr)
-    for (ImTextureData* tex : *draw_data->Textures)
-        if (tex->Status != ImTextureStatus_OK)
-            MyImGuiBackend_UpdateTexture(tex);
-```
-```cpp
-void MyImGuiBackend_UpdateTexture(ImTextureData* tex)
-{
-    if (tex->Status == ImTextureStatus_WantCreate)
-    {
-        // Create texture based on tex->Width, tex->Height.
-        // - Most backends only support tex->Format == ImTextureFormat_RGBA32.
-        // - Backends for particularly memory constrained platforms may support tex->Format == ImTextureFormat_Alpha8.
-
-        // Upload all texture pixels
-        // - Read from our CPU-side copy of the texture and copy to your graphics API.
-        // - Use tex->Width, tex->Height, tex->GetPixels(), tex->GetPixelsAt(), tex->GetPitch() as needed.
-
-        // Store your data, and acknowledge creation.
-        tex->SetTexID(xxxx); // Specify backend-specific ImTextureID identifier which will be stored in ImDrawCmd.
-        tex->SetStatus(ImTextureStatus_OK);
-        tex->BackendUserData = xxxx; // Store more backend data if needed (most backend allocate a small texture to store data in there)
-    }
-    if (tex->Status == ImTextureStatus_WantUpdates)
-    {
-        // Upload a rectangle of pixels to the existing texture
-        // - We only ever write to textures regions which have never been used before!
-        // - Use tex->TexID or tex->BackendUserData to retrieve your stored data.
-        // - Use tex->UpdateRect.x/y, tex->UpdateRect.w/h to obtain the block position and size.
-        //   - Use tex->Updates[] to obtain individual sub-regions within tex->UpdateRect. Not recommended.
-        // - Read from our CPU-side copy of the texture and copy to your graphics API.
-        // - Use tex->Width, tex->Height, tex->GetPixels(), tex->GetPixelsAt(), tex->GetPitch() as needed.
-
-        // Acknowledge update
-        tex->SetStatus(ImTextureStatus_OK);
-    }
-    if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
-    {
-        // If you use staged rendering and have in-flight renders, changed tex->UnusedFrames > 0 check to higher count as needed e.g. > 2
-
-        // Destroy texture
-        // - Use tex->TexID or tex->BackendUserData to retrieve your stored data.
-        // - Destroy texture in your graphics API.
-
-        // Acknowledge destruction
-        tex->SetTexID(ImTextureID_Invalid);
-        tex->SetStatus(ImTextureStatus_Destroyed);
-    }
-}
-```
-Refer to "List of commits which added support for `ImGuiBackendFlags_RendererHasTextures` in standard backends" above for concrete examples of this.

docs/CONTRIBUTING.md

@@ -34,7 +34,7 @@ Only if you:
 
 Then please [use the Discussions forums](https://github.com/ocornut/imgui/discussions) instead of opening an issue.
 
-If Dear ImGui is successfully showing in your app and you have used Dear ImGui before, you can open an Issue. Any form of discussions is welcome as a new issue.
+If Dear ImGui is successfully showing in your app and you have used Dear ImGui before, you can open an Issue. Any form of discussions is welcome as a new issue. 
 
 ## How to open an issue
 
@@ -52,7 +52,7 @@ Steps:
 - **Please INCLUDE CODE. Provide a Minimal, Complete, and Verifiable Example ([MCVE](https://stackoverflow.com/help/mcve)) to demonstrate your problem**. An ideal submission includes a small piece of code that anyone can paste into one of the examples applications (examples/../main.cpp) or demo (imgui_demo.cpp) to understand and reproduce it. **Narrowing your problem to its shortest and purest form is the easiest way to understand it, explain it and fix it**. Please test your shortened code to ensure it exhibits the problem. **Often while creating the MCVE you will solve the problem!** Many questions that are missing a standalone verifiable example are missing the actual cause of their issue in the description, which ends up wasting everyone's time.
 - **Attach screenshots (or GIF/video) to clarify the context**. They often convey useful information that is omitted by the description. You can drag pictures/files in the message edit box. Avoid using 3rd party image hosting services, prefer the long-term longevity of GitHub attachments (you can drag pictures into your post). On Windows, you can use [ScreenToGif](https://www.screentogif.com/) to easily capture .gif files.
 - **If you are discussing an assert or a crash, please provide a debugger callstack**. Never state "it crashes" without additional information. If you don't know how to use a debugger and retrieve a callstack, learning about it will be useful.
-- **Please make sure that your project has asserts enabled.** Calls to IM_ASSERT() are scattered in the code to help catch common issues. When an assert is triggered read the comments around it. By default IM_ASSERT() calls the standard assert() function. To verify that your asserts are enabled, add the line `IM_ASSERT(false);` in your main() function. Your application should display an error message and abort. If your application doesn't report an error, your asserts are disabled.
+- **Please make sure that your project has asserts enabled.** Calls to IM_ASSERT() are scattered in the code to help catch common issues. When an assert is triggered read the comments around it. By default IM_ASSERT() calls the standard assert() function. To verify that your asserts are enabled, add the line `IM_ASSERT(false);` in your main() function. Your application should display an error message and abort. If your application doesn't report an error, your asserts are disabled. 
 - Please state if you have made substantial modifications to your copy of Dear ImGui or the back-end.
 - If you are not calling Dear ImGui directly from C++, please provide information about your Language and the wrapper/binding you are using.
 - Be mindful that messages are being sent to the mailbox of "Watching" users. Try to proofread your messages before sending them. Edits are not seen by those users unless they browse the site.
@@ -65,17 +65,17 @@ If you have been using Dear ImGui for a while or have been using C/C++ for sever
 
 ## How to open a Pull Request
 
-- **Please understand that by submitting a PR you are also submitting a request for the maintainer to review your code and then take over its maintenance.** PR should be crafted both in the interest of the end-users and also to ease the maintainer into understanding and accepting it.
+- **Please understand that by submitting a PR you are also submitting a request for the maintainer to review your code and then take over its maintenance.** PR should be crafted both in the interest of the end-users and also to ease the maintainer into understanding and accepting it. 
 - Many PRs are useful to demonstrate a need and a possible solution but aren't adequate for merging (causing other issues, not seeing other aspects of the big picture, etc.). In doubt, don't hesitate to push a PR because that is always the first step toward pointing toward a problem, and finding the mergeable solution! Even if a PR stays unmerged for a long time, its presence can be useful for other users and helps toward finding a general solution.
-- **When adding a feature,** please describe the usage context (how you intend to use it, why you need it, etc.). Be mindful of [The XY Problem](http://xyproblem.info/).
+- **When adding a feature,** please describe the usage context (how you intend to use it, why you need it, etc.). Be mindful of [The XY Problem](http://xyproblem.info/). 
 - **When fixing a warning or compilation problem,** please post the compiler log and specify the compiler version and platform you are using.
 - **Attach screenshots (or GIF/video) to clarify the context and demonstrate the feature at a glance.** You can drag pictures/files in the message edit box. Prefer the long-term longevity of GitHub attachments over 3rd party hosting (you can drag pictures into your post).
-- **Make sure your code follows the coding style already used in the codebase:** 4 spaces indentations (no tabs), `local_variable`, `FunctionName()`, `MemberName`, `// Text Comment`, `//CodeComment();`, C-style casts, etc.. We don't use modern C++ idioms and tend to use only a minimum of C++11 features. The applications under examples/ are generally less consistent because they sometimes try to mimic the coding style often adopted by a certain ecosystem (e.g. DirectX-related code tend to use the style of their sample).
+- **Make sure your code follows the coding style already used in the codebase:** 4 spaces indentations (no tabs), `local_variable`, `FunctionName()`, `MemberName`, `// Text Comment`, `//CodeComment();`, C-style casts, etc.. We don't use modern C++ idioms and tend to use only a minimum of C++11 features. The applications under examples/ are generally less consistent because they sometimes try to mimic the coding style often adopted by a certain ecosystem (e.g. DirectX-related code tend to use the style of their sample). 
 - **Make sure you create a branch dedicated to the pull request**. In Git, 1 PR is associated to 1 branch. If you keep pushing to the same branch after you submitted the PR, your new commits will appear in the PR (we can still cherry-pick individual commits).
 
 ## Copyright / Contributor License Agreement
 
 Any code you submit will become part of the repository and be distributed under the [Dear ImGui license](https://github.com/ocornut/imgui/blob/master/LICENSE.txt). By submitting code to the project you agree that the code is your work and that you can give it to the project.
 
-You also agree by submitting your code that you grant all transferable rights to the code to the project maintainer, including for example re-licensing the code, modifying the code, and distributing it in source or binary forms. Specifically, this includes a requirement that you assign copyright to the project maintainer. For this reason, do not modify any copyright statements in files in any PRs.
+You also agree by submitting your code that you grant all transferrable rights to the code to the project maintainer, including for example re-licensing the code, modifying the code, and distributing it in source or binary forms. Specifically, this includes a requirement that you assign copyright to the project maintainer. For this reason, do not modify any copyright statements in files in any PRs.
 

docs/EXAMPLES.md

@@ -3,7 +3,7 @@ _(You may browse this at https://github.com/ocornut/imgui/blob/master/docs/EXAMP
 ## Dear ImGui: Examples
 
 **The [examples/](https://github.com/ocornut/imgui/blob/master/examples) folder example applications (standalone, ready-to-build) for variety of
-platforms and graphics APIs.** They all use standard backends from the [backends/](https://github.com/ocornut/imgui/blob/master/backends) folder (see [docs/BACKENDS.md](https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md)).
+platforms and graphics APIs.** They all use standard backends from the [backends/](https://github.com/ocornut/imgui/blob/master/backends) folder (see [BACKENDS.md](https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md)).
 
 The purpose of Examples is to showcase integration with backends, let you try Dear ImGui, and guide you toward
 integrating Dear ImGui in your own application/game/engine.
@@ -58,7 +58,7 @@ Allegro 5 example. <BR>
 Android + OpenGL3 (ES) example. <BR>
 = main.cpp + imgui_impl_android.cpp + imgui_impl_opengl3.cpp
 
-[example_apple_metal/](https://github.com/ocornut/imgui/tree/master/examples/example_apple_metal/) <BR>
+[example_apple_metal/](https://github.com/ocornut/imgui/blob/master/examples/example_metal/) <BR>
 OSX & iOS + Metal example. <BR>
 = main.m + imgui_impl_osx.mm + imgui_impl_metal.mm <BR>
 It is based on the "cross-platform" game template provided with Xcode as of Xcode 9.
@@ -72,7 +72,7 @@ OSX + OpenGL2 example. <BR>
  You may prefer to use the GLFW Or SDL backends, which will also support Windows and Linux.)
 
 [example_glfw_wgpu/](https://github.com/ocornut/imgui/blob/master/examples/example_glfw_wgpu/) <BR>
-GLFW + WebGPU example. Supports Emscripten (web), Dawn (native), WGPU (native). <BR>
+GLFW + WebGPU example. Supports Emscripten (web) or Dawn (desktop) <BR>
 = main.cpp + imgui_impl_glfw.cpp + imgui_impl_wgpu.cpp
 Note that the 'example_glfw_opengl3' and 'example_sdl2_opengl3' examples also supports Emscripten!
 
@@ -109,11 +109,9 @@ Note that GLUT/FreeGLUT is largely obsolete software, prefer using GLFW or SDL.
 
 [example_null/](https://github.com/ocornut/imgui/blob/master/examples/example_null/) <BR>
 Null example, compile and link imgui, create context, run headless with no inputs and no graphics output. <BR>
-= main.cpp + imgui_impl_null.cpp<BR>
+= main.cpp <BR>
 This is used to quickly test compilation of core imgui files in as many setups as possible.
 Because this application doesn't create a window nor a graphic context, there's no graphics output.
-Please note that imgui_impl_null itself is a rather empty backend. We provide it for consistency but
-it is similarly easy to create a skeleton application without the null backend.
 
 [example_sdl2_directx11/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_directx11/) <BR>
 SDL2 + DirectX11 example, Windows only. <BR>
@@ -151,19 +149,6 @@ SDL2 (Win32, Mac, Linux, etc.) + Vulkan example. <BR>
 This is quite long and tedious, because: Vulkan. <BR>
 For this example, the main.cpp file exceptionally use helpers function from imgui_impl_vulkan.h/cpp.
 
-[example_sdl2_wgpu/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl2_wgpu/) <BR>
-SDL2 + WebGPU example. Supports Emscripten (web), Dawn (native), WGPU (native). <BR>
-= main.cpp + imgui_impl_sdl2.cpp + imgui_impl_wgpu.cpp
-(note that the 'example_sdl2_opengl3' example also supports Emscripten!)
-
-[example_sdl3_directx11/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl3_directx11/) <BR>
-SDL3 + DirectX11 examples, Windows only. <BR>
-= main.cpp + imgui_impl_sdl3.cpp + imgui_impl_dx11.cpp <BR>
-
-[example_sdl3_metal/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl3_metal/) <BR>
-SDL3 + Metal example, Mac only. <BR>
-= main.cpp + imgui_impl_sdl3.cpp + imgui_impl_metal.mm <BR>
-
 [example_sdl3_opengl3/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl3_opengl3/) <BR>
 SDL3 (Win32, Mac, Linux, etc.) + OpenGL3+/ES2/ES3 example. <BR>
 = main.cpp + imgui_impl_sdl3.cpp + imgui_impl_opengl3.cpp <BR>
@@ -184,11 +169,6 @@ SDL3 (Win32, Mac, Linux, etc.) + Vulkan example. <BR>
 This is quite long and tedious, because: Vulkan. <BR>
 For this example, the main.cpp file exceptionally use helpers function from imgui_impl_vulkan.h/cpp.
 
-[example_sdl3_wgpu/](https://github.com/ocornut/imgui/blob/master/examples/example_sdl3_wgpu/) <BR>
-SDL3 + WebGPU example. Supports Emscripten (web), Dawn (native), WGPU (native). <BR>
-= main.cpp + imgui_impl_sdl3.cpp + imgui_impl_wgpu.cpp
-(note that the 'example_sdl3_opengl3' example also supports Emscripten!)
-
 [example_win32_directx9/](https://github.com/ocornut/imgui/blob/master/examples/example_win32_directx9/) <BR>
 DirectX9 example, Windows only. <BR>
 = main.cpp + imgui_impl_win32.cpp + imgui_impl_dx9.cpp

docs/FAQ.md

@@ -13,20 +13,18 @@ or view this file with any Markdown viewer.
 :---------------------------------------------------------- |
 | [Where is the documentation?](#q-where-is-the-documentation) |
 | [What is this library called?](#q-what-is-this-library-called) |
-| [What is the difference between Dear ImGui and traditional UI toolkits?](#q-what-is-the-difference-between-dear-imgui-and-traditional-ui-toolkits) |
 | [Which version should I get?](#q-which-version-should-i-get) |
 | **Q&A: Integration** |
 | **[How to get started?](#q-how-to-get-started)** |
 | **[How can I tell whether to dispatch mouse/keyboard to Dear ImGui or my application?](#q-how-can-i-tell-whether-to-dispatch-mousekeyboard-to-dear-imgui-or-my-application)** |
 | [How can I enable keyboard or gamepad controls?](#q-how-can-i-enable-keyboard-or-gamepad-controls) |
 | [How can I use this on a machine without mouse, keyboard or screen? (input share, remote display)](#q-how-can-i-use-this-on-a-machine-without-mouse-keyboard-or-screen-input-share-remote-display) |
-| [How can I create my own backend?](#q-how-can-i-create-my-own-backend)
 | [I integrated Dear ImGui in my engine and little squares are showing instead of text...](#q-i-integrated-dear-imgui-in-my-engine-and-little-squares-are-showing-instead-of-text) |
 | [I integrated Dear ImGui in my engine and some elements are clipping or disappearing when I move windows around...](#q-i-integrated-dear-imgui-in-my-engine-and-some-elements-are-clipping-or-disappearing-when-i-move-windows-around) |
 | [I integrated Dear ImGui in my engine and some elements are displaying outside their expected windows boundaries...](#q-i-integrated-dear-imgui-in-my-engine-and-some-elements-are-displaying-outside-their-expected-windows-boundaries) |
 | **Q&A: Usage** |
-| **[About the ID Stack system...](#q-about-the-id-stack-system)**<br>**[How can I have multiple widgets with the same label?](#q-how-can-i-have-multiple-widgets-with-the-same-label) (using `##` or `PushID()`)**<br>**[How can I have widgets with an empty label?](#q-how-can-i-have-widgets-with-an-empty-label) (using `##`)**<br>**[How can I animate the label of an existing widget?](#q-how-can-i-change-the-label-of-an-existing-widget) (using `###`)**<br>**[General description of the label and ID Stack system.](#general-description-of-the-label-and-id-stack-system)** |
-| [How can I display an image?](#q-how-can-i-display-an-image)<br>[What are ImTextureID/ImTextureRef?](#q-what-are-imtextureidimtextureref)|
+| **[About the ID Stack system..<br>Why is my widget not reacting when I click on it?<br>Why is the wrong widget reacting when I click on one?<br>How can I have widgets with an empty label?<br>How can I have multiple widgets with the same label?<br>How can I have multiple windows with the same label?](#q-about-the-id-stack-system)** |
+| [How can I display an image? What is ImTextureID, how does it work?](#q-how-can-i-display-an-image-what-is-imtextureid-how-does-it-work)|
 | [How can I use maths operators with ImVec2?](#q-how-can-i-use-maths-operators-with-imvec2) |
 | [How can I use my own maths types instead of ImVec2/ImVec4?](#q-how-can-i-use-my-own-maths-types-instead-of-imvec2imvec4) |
 | [How can I interact with standard C++ types (such as std::string and std::vector)?](#q-how-can-i-interact-with-standard-c-types-such-as-stdstring-and-stdvector) |
@@ -55,7 +53,6 @@ or view this file with any Markdown viewer.
 - Handy [Getting Started](https://github.com/ocornut/imgui/wiki/Getting-Started) guide to integrate Dear ImGui in an existing application.
 - 20+ standalone example applications using e.g. OpenGL/DirectX are provided in the [examples/](https://github.com/ocornut/imgui/blob/master/examples/) folder to explain how to integrate Dear ImGui with your own engine/application. You can run those applications and explore them.
 - See demo code in [imgui_demo.cpp](https://github.com/ocornut/imgui/blob/master/imgui_demo.cpp) and particularly the `ImGui::ShowDemoWindow()` function. The demo covers most features of Dear ImGui, so you can read the code and see its output.
-- See pthom's online [imgui_explorer](https://pthom.github.io/imgui_explorer) which is a web version of the demo with a source code browser.
 - See documentation: [Backends](https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md), [Examples](https://github.com/ocornut/imgui/blob/master/docs/EXAMPLES.md), [Fonts](https://github.com/ocornut/imgui/blob/master/docs/FONTS.md).
 - See documentation and comments at the top of [imgui.cpp](https://github.com/ocornut/imgui/blob/master/imgui.cpp) + general API comments in [imgui.h](https://github.com/ocornut/imgui/blob/master/imgui.h).
 - The [Glossary](https://github.com/ocornut/imgui/wiki/Glossary) page may be useful.
@@ -77,60 +74,6 @@ or view this file with any Markdown viewer.
 
 ---
 
-### Q: What is the difference between Dear ImGui and traditional UI toolkits?
-
-Here's a very simplified comparison between the approach taken by Dear ImGui vs traditional toolkits:
-
-| Dear ImGui | Qt/GTK/WPF... |
-|--------------------------|--------------------------|
-| UI fully issued on every update. | UI issued once then later modified. |
-| UI layout is fully dynamic and can change at any time.<BR>UI is generally emitted programmatically, which empowers reflecting a dynamic set of data. | UI layout is mostly static.<BR>UI may be emitted programmatically or from data created by offline tools. UI need extra code to evolve, which is often tedious and error-prone if it needs to be reflecting dynamic data and systems. |
-| Application can submit UI based on arbitrary logic and then forget about it. | Application needs more bookkeeping of UI elements. |
-| UI library stores minimal amounts of data. At one point in time, it typically doesn't know or remember which other widgets are displayed and which widgets are coming next. As a result, certain layout features (alignment, resizing) are not as easy to implement or require ad-hoc code. | UI library stores entire widgets tree and state. UI library can use this retained data to easily layout things. |
-| UI code may be added anywhere.<BR>You can even create UI to edit a local variable! | UI code needs to be added in dedicated spots. |
-| UI layout/logic/action/data bindings are all nearby in the code. | UI layout/logic/action/data bindings in distinct functions, files or formats. |
-| Data is naturally always synchronized. | Use callback/signal/slot for synchronizing data (error-prone). |
-| API is simple and easy to learn. In particular, doing basic things is very easy. | API is more complex and specialized. |
-| API is low-level (raw language types). | API are higher-level (more abstractions, advanced language features). |
-| Less fancy look and feel. | Standard look and feel. |
-| Compile yourself. Easy to debug, hack, modify, study. | Mostly use precompiled libraries. Compiling, modifying or studying is daunting if not impossible. |
-| Run on every platform. | Run on limited desktop platforms. |
-
-Idiomatic Dear ImGui code:
-```cpp
-if (ImGui::Button("Save"))
-    MySaveFunction();
-
-ImGui::SliderFloat("Slider", &m_MyValue, 0.0f, 1.0f);
-```
-Idiomatic code with traditional toolkit:
-```cpp
-UiButton* button = new UiButton("Save");
-button->OnClick = &MySaveFunction;
-parent->Add(button);
-
-UiSlider* slider = new UiSlider("Slider");
-slider->SetRange(0.0f, 1.0f);
-slider->BindData<float>(&m_MyValue);
-parent->Add(slider);
-```
-This is only meant to give you a intuitive feeling of the main differences, but pros & cons go deeper than that.
-
-Some of those properties are typically associated to the umbrella term "IMGUI", but the term has no simple and well-agreed definition. There are many erroneous statements and misunderstandings with what IMGUI means. It is partly caused by the fact that most popular IMGUI implementations (including Dear ImGui) have originated from game industry needs and have targeted specific use cases, causing people to conflate IMGUI properties with what a specific library does. However, it is perfectly possible to implement an IMGUI library that would have very different properties than e.g. Dear ImGui. My take on defining what an IMGUI is:
-
-**IMGUI refers to the API: literally the interface between the application and the UI system.**
-- An IMGUI API favors the application code owning its data and being the single source of truth for it.
-- An IMGUI API tries to minimize the application having to retain/manage data related to the UI system.
-- An IMGUI API tries to minimize the UI system having to retain/manage data related to the application.
-- Synchronization between application data and UI data is natural and less error-prone.
-
-**IMGUI does NOT refer to the implementation. Whatever happens inside the UI library code doesn't matter.**
-<BR>Also see: [Links to many articles about the IMGUI paradigm](https://github.com/ocornut/imgui/wiki/#about-the-imgui-paradigm).
-
-##### [Return to Index](#index)
-
----
-
 ### Q: Which version should I get?
 I occasionally tag [Releases](https://github.com/ocornut/imgui/releases) but it is generally safe and recommended to sync to master/latest. The library is fairly stable and regressions tend to be fixed fast when reported.
 
@@ -149,8 +92,8 @@ Many projects are using this branch and it is kept in sync with master regularly
 ### Q: How to get started?
 
 Read [Getting Started](https://github.com/ocornut/imgui/wiki/Getting-Started). <BR>
-Read [docs/EXAMPLES.md](https://github.com/ocornut/imgui/blob/master/docs/EXAMPLES.md). <BR>
-Read [docs/BACKENDS.md](https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md). <BR>
+Read [EXAMPLES.md](https://github.com/ocornut/imgui/blob/master/docs/EXAMPLES.md). <BR>
+Read [BACKENDS.md](https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md). <BR>
 Read `PROGRAMMER GUIDE` section of [imgui.cpp](https://github.com/ocornut/imgui/blob/master/imgui.cpp). <BR>
 The [Wiki](https://github.com/ocornut/imgui/wiki) is a hub to many resources and links.
 
@@ -216,18 +159,9 @@ Console SDK also sometimes provide equivalent tooling or wrapper for Synergy-lik
 
 ---
 
-### Q: How can I create my own backend?
-- See [docs/BACKENDS.md](https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md).
-- See Documentation at the top of imgui.cpp.
-
-##### [Return to Index](#index)
-
----
-
 ### Q: I integrated Dear ImGui in my engine and little squares are showing instead of text...
 Your renderer backend is not using the font texture correctly or it hasn't been uploaded to the GPU.
-- If this happens using standard backends (before 1.92): A) have you modified the font atlas after `ImGui_ImplXXX_NewFrame()`? B) maybe the texture failed to upload, which **can if your texture atlas is too big**. Also see [docs/FONTS.md](https://github.com/ocornut/imgui/blob/master/docs/FONTS.md).
-- If this happens using standard backends (after 1.92): please report.
+- If this happens using the standard backends: A) have you modified the font atlas after `ImGui_ImplXXX_NewFrame()`? B) maybe the texture failed to upload, which **can if your texture atlas is too big**. Also see [docs/FONTS.md](https://github.com/ocornut/imgui/blob/master/docs/FONTS.md).
 - If this happens with a custom backend: make sure you have uploaded the font texture to the GPU, that all shaders are rendering states are setup properly (e.g. texture is bound). Compare your code to existing backends and use a graphics debugger such as [RenderDoc](https://renderdoc.org) to debug your rendering states.
 
 ##### [Return to Index](#index)
@@ -263,19 +197,15 @@ ctx->RSSetScissorRects(1, &r);
 
 # Q&A: Usage
 
-## Q: About the ID Stack system...
+### Q: About the ID Stack system...
+### Q: Why is my widget not reacting when I click on it?
+### Q: Why is the wrong widget reacting when I click on one?
+### Q: How can I have widgets with an empty label?
+### Q: How can I have multiple widgets with the same label?
+### Q: How can I have multiple windows with the same label?
 
 **USING THE SAME LABEL+ID IS THE MOST COMMON USER MISTAKE!**
 <br>**USING AN EMPTY LABEL IS THE SAME AS USING THE SAME LABEL AS YOUR PARENT WIDGET!**
-<br>Read the questions in this section for a more general understand of how labels and ID works in Dear ImGui.
-
-TL;DR;
-- Widgets labels are also used to compute Widgets unique identifiers.
-- Unique identifiers are hashes of the label + of the parent scope (e.g. parent window or parent tree node labels).
-- You can use `PushID()` to append to the identifier without making it visible.
-- You can use `"##something"` in a label to append to the identifier without making it visible.
-- You can use `"###something"` in a label to make the identifier ignore the visible part.
-
 <table>
 <tr>
 <td><img src="https://github.com/user-attachments/assets/776a8315-1164-4178-9a8c-df52e0ff28aa"></td>
@@ -303,102 +233,19 @@ for (int n = 0; n < 3; n++)
 ImGui::End();
 </pre>
 </td>
-</tr>
+</tr>    
 </table>
 
-### Q: How can I have multiple widgets with the same label?
-
-A. When widgets are in a same scope and finite, you can use a `"##something"` suffix which will be part of the identifier but not visible as a label.
-
-```cpp
-Button("Play");        // Label = "Play",   ID = hash of ("MyWindow", "Play")
-Button("Play##foo1");  // Label = "Play",   ID = hash of ("MyWindow", "Play##foo1")  // Different from other buttons
-Button("Play##foo2");  // Label = "Play",   ID = hash of ("MyWindow", "Play##foo2")  // Different from other buttons
-```
-
-B. More generally, e.g. in loops, you can use `PushID()/PopID()` to push a prefix which will be part of the identifier.
-
-```cpp
-// Using PushID() with a string
-for (int i = 0; i < 100; i++)
-{
-  MyObject* obj = Objects[i];
-  PushID(obj->Name);
-  Button("Click");     // Label = "Click",  ID = hash of ("Window", obj->Name, "Click")
-  PopID();
-}
-```
-
-```cpp
-// Using PushID() with an index
-for (int i = 0; i < 100; i++)
-{
-  PushID(i);
-  Button("Click");     // Label = "Click",  ID = hash of ("Window", i, "Click")
-  PopID();
-}
-```
-
-### Q: How can I have widgets with an empty label?
-
-If you want to completely hide the label, but still need an ID:
-
-```cpp
-Checkbox("##On", &b);  // Label = "",       ID = hash of (..., "##On")   // No visible label, just a checkbox!
-```
-##### [Return to Index](#index)
-
-### Q: How can I make a label dynamic?
-
-Dear ImGui is very dynamic so you can submit different widgets every frame.
-However, in order to preserve widget state (eg. which tree node is open; which button is focused) the library internaly refers to their unique ID.
-
-Occasionally you might want to change a label while preserving a constant ID. This allows you to change/animate labels while persisting associated state.
-For example, you may want to include varying information in a window title bar or button label.
-
-Using "###" exclude the preceeding part from ID computation:
-```cpp
-Button("Hello###ID");   // Label = "Enable",   ID = hash of (..., "ID")
-Button("World###ID");   // Label = "Disable",  ID = hash of (..., "ID")  // Same ID, different label
-```
-Using a same ID ensure that associated related e.g. weither the widget is focused, won't be lost when the label changes.
-
-<table>
-<tr>
-<td><img src="https://github.com/user-attachments/assets/2bf18756-e122-498d-bbd4-5c44bb1018d5"></td>
-<td>
-<pre lang="cpp">
-// Window label has animating FPS counter
-// Window ID stays the same = hash of "MyGame"
-char buf[128];
-sprintf(buf, "My game (%.1f FPS)###MyGame", io.Framerate);
-ImGui::Begin(buf);
-&nbsp;
-// Label changes between "Enable" and "Disable"
-// ID stays the same = hash of ("MyGame", "MyButton")
-if (ImGui::Button(enabled ? "Disable###MyButton" : "Enable###MyButton", { -FLT_MIN, 0.0f }))
-    enabled = !enabled;
-&nbsp;
-ImGui::End();
-</pre>
-</td>
-</tr>
-</table>
-
-(Hint: I'd suggest wrapping sprintf in something more compact to use, e.g. [ocornut/Str](https://github.com/ocornut/Str) for what I personally use).
-
-##### [Return to Index](#index)
-
-### General description of the label and ID Stack system
+A primer on labels and the ID Stack...
 
 Dear ImGui internally needs to uniquely identify UI elements.
-Elements that are typically not clickable (such as calls to Text() functions) don't need an ID.
-Interactive widgets (such as calls to Button() functions) need a unique ID.
+Elements that are typically not clickable (such as calls to the Text functions) don't need an ID.
+Interactive widgets (such as calls to Button buttons) need a unique ID.
 
 **Unique IDs are used internally to track active widgets and occasionally associate state to widgets.<BR>
 Unique IDs are implicitly built from the hash of multiple elements that identify the "path" to the UI element.**
 
-You can use `Demo>Tools>ID Stack Tool` or call `ImGui::ShowIDStackToolWindow()`. The tool display intermediate values leading to the creation of a unique ID, making things easier to debug and understand.
+Since Dear ImGui 1.85, you can use `Demo>Tools>ID Stack Tool` or call `ImGui::ShowIDStackToolWindow()`. The tool display intermediate values leading to the creation of a unique ID, making things easier to debug and understand.
 
 ![Stack tool](https://user-images.githubusercontent.com/8225057/136235657-a0ea5665-dcd1-423f-9be6-dc3f8ced8f12.png)
 
@@ -452,7 +299,20 @@ Button("Play##foo2");  // Label = "Play",   ID = hash of ("MyWindow", "Play##foo
 Button("##foo");       // Label = "",       ID = hash of ("MyWindow", "##foo")       // Different from window
 End();
 ```
+- If you want to completely hide the label, but still need an ID:
+```cpp
+Checkbox("##On", &b);  // Label = "",       ID = hash of (..., "##On")   // No visible label, just a checkbox!
+```
+- Occasionally/rarely you might want to change a label while preserving a constant ID. This allows
+you to animate labels. For example, you may want to include varying information in a window title bar,
+but windows are uniquely identified by their ID. Use "###" to pass a label that isn't part of ID:
+```cpp
+Button("Hello###ID");  // Label = "Hello",  ID = hash of (..., "###ID")
+Button("World###ID");  // Label = "World",  ID = hash of (..., "###ID")  // Same ID, different label
 
+sprintf(buf, "My game (%f FPS)###MyGame", fps);
+Begin(buf);            // Variable title,   ID = hash of "MyGame"
+```
 - Solving ID conflict in a more general manner:
 Use `PushID()` / `PopID()` to create scopes and manipulate the ID stack, as to avoid ID conflicts
 within the same window. This is the most convenient way of distinguishing ID when iterating and
@@ -515,73 +375,23 @@ node open/closed state differently. See what makes more sense in your situation!
 
 ---
 
-### Q: How can I display an image?
-### Q: What are ImTextureID/ImTextureRef?
+### Q: How can I display an image? What is ImTextureID, how does it work?
 
-**Short explanation:**
+Short explanation:
+- Refer to [Image Loading and Displaying Examples](https://github.com/ocornut/imgui/wiki/Image-Loading-and-Displaying-Examples) on the [Wiki](https://github.com/ocornut/imgui/wiki).
 - You may use functions such as `ImGui::Image()`, `ImGui::ImageButton()` or lower-level `ImDrawList::AddImage()` to emit draw calls that will use your own textures.
-- To load and display your own textures, refer to [Image Loading and Displaying Examples](https://github.com/ocornut/imgui/wiki/Image-Loading-and-Displaying-Examples) on the [Wiki](https://github.com/ocornut/imgui/wiki).
 - Actual textures are identified in a way that is up to the user/engine. Those identifiers are stored and passed as an opaque ImTextureID value.
 - By default ImTextureID can store up to 64-bits. You may `#define` it to a custom type/structure if you need.
 - Loading image files from the disk and turning them into a texture is not within the scope of Dear ImGui (for a good reason), but the examples linked above may be useful references.
 
-**Details:**
-
-1.92 introduced `ImTextureRef` in June 2025.
-- All drawing functions using `ImTextureID` were changed to use `ImTextureRef`.
-- You can trivially create a `ImTextureRef` from a `ImTextureID`.
-- **If you use Image functions with textures that you have loaded/created yourself, you will mostly likely only ever store/manipulate `ImTextureID` and then pass them as `ImTextureRef`.**
-- You only NEED to manipulate `ImTextureRef` when dealing with textures managed by the backend itself, aka mainly the atlas texture for now.
-- We intentionally do not provide an implicit `ImTextureRef` -> `ImTextureID` cast operator because it is technically lossy to convert ImTextureRef to ImTextureID before rendering.
-
-**ImTextureID = backend specific, low-level identifier for a texture uploaded in GPU/graphics system.**
-```cpp
-#ifndef ImTextureID
-typedef ImU64 ImTextureID;  // Default: store up to 64-bits (any pointer or integer). A majority of backends are ok with that.
-#endif
-```
-- When a Rendered Backend creates a texture, it store its native identifier into a ImTextureID value (e.g. Used by DX11 backend to a `ID3D11ShaderResourceView*`; Used by OpenGL backends to store `GLuint`; Used by SDLGPU backend to store a `SDL_GPUTextureSamplerBinding*`, etc.).
-- User may submit their own textures to e.g. `ImGui::Image()` function by passing this value.
-- During the rendering loop, the Renderer Backend retrieve the ImTextureID, which stored inside a ImTextureRef, which is stored inside ImDrawCmd.
-- Compile-time type configuration:
-  - To use something other than a 64-bit value: add '#define ImTextureID MyTextureType*' in your imconfig.h file.
-  - This can be whatever to you want it to be! read the FAQ entry about textures for details.
-  - You may decide to store a higher-level structure containing texture, sampler, shader etc. with various constructors if you like. You will need to implement ==/!= operators.
-
-**ImTextureRef = higher-level identifier for a texture.**
-```cpp
-// Store a ImTextureID _or_ a ImTextureData*.
-struct ImTextureRef
-{
-    ImTextureRef()                          { _TexData = NULL; _TexID = ImTextureID_Invalid; }
-    ImTextureRef(ImTextureID tex_id)        { _TexData = NULL; _TexID = tex_id; }
-    inline ImTextureID  GetTexID() const    { return _TexData ? _TexData->TexID : _TexID; }
-
-    // Members (either are set, never both!)
-    ImTextureData*      _TexData;           //      A texture, generally owned by a ImFontAtlas. Will convert to ImTextureID during render loop, after texture has been uploaded.
-    ImTextureID         _TexID;             // _OR_ Low-level backend texture identifier, if already uploaded or created by user/app. Generally provided to e.g. ImGui::Image() calls.
-};
-```
-- The identifier is valid even before the texture has been uploaded to the GPU/graphics system.
-- This is what gets passed to functions such as `ImGui::Image()`, `ImDrawList::AddImage()`.
-- This is what gets stored in draw commands (`ImDrawCmd`) to identify a texture during rendering.
- - When a texture is created by user code (e.g. custom images), we directly store the low-level `ImTextureID`.
-   - Because of this, when displaying your own texture you are likely to ever only manage ImTextureID values on your side.
- - When a texture is created by the backend, we store a `ImTextureData*` which becomes an indirection to extract the `ImTextureID` value during rendering, after texture upload has happened.
- - To create a `ImTextureRef` from a `ImTextureData*` you can use `ImTextureData::GetTexRef()`.
-   We intentionally do not provide an `ImTextureRef` constructor for this: we don't expect this to be frequently useful to the end-user, and it would be erroneously called by many legacy code.
- - There is no constructor to create a `ImTextureRef` from a `ImTextureData*` as we don't expect this to be useful to the end-user, and it would be erroneously called by many legacy code.
- - If you want to bind the current atlas when using custom rectangles, you can use `io.Fonts->TexRef`.
- - Binding generators for languages such as C (which don't have constructors), should provide a helper, e.g. `inline ImTextureRef ImTextureRefFromID(ImTextureID tex_id) { ImTextureRef tex_ref = { ._TexData = NULL, .TexID = tex_id }; return tex_ref; }`
-
 **Please read documentations or tutorials on your graphics API to understand how to display textures on the screen before moving onward.**
 
 Long explanation:
 - Dear ImGui's job is to create "meshes", defined in a renderer-agnostic format made of draw commands and vertices. At the end of the frame, those meshes (ImDrawList) will be displayed by your rendering function. They are made up of textured polygons and the code to render them is generally fairly short (a few dozen lines). In the examples/ folder, we provide functions for popular graphics APIs (OpenGL, DirectX, etc.).
 - Each rendering function decides on a data type to represent "textures". The concept of what is a "texture" is entirely tied to your underlying engine/graphics API.
-We carry the information to identify a "texture" in the ImTextureID type, which itself tends to be stored inside a ImTextureRef.
+ We carry the information to identify a "texture" in the ImTextureID type.
 ImTextureID default to ImU64 aka 8 bytes worth of data: just enough to store one pointer or integer of your choice.
-Dear ImGui doesn't know or understand what you are storing in ImTextureID, it merely passes values until they reach your rendering function.
+Dear ImGui doesn't know or understand what you are storing in ImTextureID, it merely passes ImTextureID values until they reach your rendering function.
 - In the [examples/](https://github.com/ocornut/imgui/tree/master/examples) backends, for each graphics API we decided on a type that is likely to be a good representation for specifying an image from the end-user perspective. This is what the _examples_ rendering functions are using:
 ```cpp
 OpenGL:
@@ -729,56 +539,30 @@ ImGui::End();
 
 ### Q: How should I handle DPI in my application?
 
-Since 1.92 (June 2025) fonts may be dynamically used at any size.
+The short answer is: obtain the desired DPI scale, load your fonts resized with that scale (always round down fonts size to the nearest integer), and scale your Style structure accordingly using `style.ScaleAllSizes()`.
 
-**Scaling fonts**
+Your application may want to detect DPI change and reload the fonts and reset style between frames.
 
-Select default size:
-```cpp
-style.FontSizeBase = 20.0f;
-```
-Scale all fonts:
-```cpp
-style.FontScaleDpi = 2.0f;
-```
+Your ui code  should avoid using hardcoded constants for size and positioning. Prefer to express values as multiple of reference values such as `ImGui::GetFontSize()` or `ImGui::GetFrameHeight()`. So e.g. instead of seeing a hardcoded height of 500 for a given item/window, you may want to use `30*ImGui::GetFontSize()` instead.
 
-To change font size:
-```cpp
-ImGui::PushFont(NULL, 42.0f); // This will be multiplied by style.FontScaleDpi
-```
-To change font and font size:
-```cpp
-ImGui::PushFont(new_font, 42.0f);
-```
+Down the line Dear ImGui will provide a variety of standardized reference values to facilitate using this.
 
-In `docking` branch or with multi-viewports:
-```cpp
-io.ConfigDpiScaleFonts = true;          // (Docking branch only) Automatically overwrite style.FontScaleDpi in Begin() when Monitor DPI changes. This will scale fonts but _NOT_ scale sizes/padding for now.
-io.ConfigDpiScaleViewports = true;      // (Docking branch only) Scale Dear ImGui and Platform Windows when Monitor DPI changes.
-```
+Applications in the `examples/` folder are not DPI aware partly because they are unable to load a custom font from the file-system (may change that in the future).
 
-**Scaling style** (paddings, spacings, thicknesses)
+The reason DPI is not auto-magically solved in stock examples is that we don't yet have a satisfying solution for the "multi-dpi" problem (using the `docking` branch: when multiple viewport windows are over multiple monitors using different DPI scales). The current way to handle this on the application side is:
+- Create and maintain one font atlas per active DPI scale (e.g. by iterating `platform_io.Monitors[]` before `NewFrame()`).
+- Hook `platform_io.OnChangedViewport()` to detect when a `Begin()` call makes a Dear ImGui window change monitor (and therefore DPI).
+- In the hook: swap atlas, swap style with correctly sized one, and remap the current font from one atlas to the other (you may need to maintain a remapping table of your fonts at varying DPI scales).
 
-This is still massively work in progress, expect turbulence.
-Style values are currently not easily scalable dynamically.
-For single viewport application you can call once:
-```cpp
-style.ScaleAllSizes(factor); // call once!
-```
-If you need to change the scaling factor, it is currently most practical to reset the style and call this again with a new value.
+This approach is relatively easy and functional but comes with two issues:
+- It's not possibly to reliably size or position a window ahead of `Begin()` without knowing on which monitor it'll land.
+- Style override may be lost during the `Begin()` call crossing monitor boundaries. You may need to do some custom scaling mumbo-jumbo if you want your `OnChangedViewport()` handler to preserve style overrides.
 
-Your UI code should avoid using hardcoded constants for size and positioning. Prefer to express values as multiple of reference values such as `ImGui::GetFontSize()` or `ImGui::GetFrameHeight()`. So e.g. instead of seeing a hardcoded height of 500 for a given item/window, you may want to use `30*ImGui::GetFontSize()` instead.
+Please note that if you are not using multi-viewports with multi-monitors using different DPI scales, you can ignore that and use the simpler technique recommended at the top.
 
-Down the line Dear ImGui will provide a variety of standardized reference values to facilitate using this. This is expected to happen during subsequent 1.92.x releases.
+On Windows, in addition to scaling the font size (make sure to round to an integer) and using `style.ScaleAllSizes()`, you will need to inform Windows that your application is DPI aware. If this is not done, Windows will scale the application window and the UI text will be blurry. Potential solutions to indicate DPI awareness on Windows are:
 
-Applications in the `examples/` folder are partly DPI aware but they are unable to load a custom font from the file-system, so they look ugly (may change that in the future).
-
-The reason DPI is not auto-magically solved in stock examples is that we don't yet have a satisfying solution for the "multi-dpi" problem (using the `docking` branch: when multiple viewport windows are over multiple monitors using different DPI scales) specifically for the `ImGuiStyle` structure. Fonts are however now perfectly scalable.
-
-**On Windows, you need to inform Windows that your application is DPI aware!**
-If this is not done, Windows will scale the application window and the UI text will be blurry. Potential solutions to indicate DPI awareness on Windows are:
-- For SDL2: the flag `SDL_WINDOW_ALLOW_HIGHDPI` needs to be passed to `SDL_CreateWindow()` + call `::SetProcessDPIAware()`.
-- For SDL3: the flag `SDL_WINDOW_HIGH_PIXEL_DENSITY` needs to be passed to `SDL_CreateWindow()`.
+- For SDL: the flag `SDL_WINDOW_ALLOW_HIGHDPI` needs to be passed to `SDL_CreateWindow()``.
 - For GLFW: this is done automatically.
 - For other Windows projects with other backends, or wrapper projects:
   - We provide a `ImGui_ImplWin32_EnableDpiAwareness()` helper method in the Win32 backend.
@@ -830,12 +614,9 @@ Use the font atlas to pack them into a single texture. Read [docs/FONTS.md](http
 ---
 
 ### Q: How can I display and input non-Latin characters such as Chinese, Japanese, Korean, Cyrillic?
+When loading a font, pass custom Unicode ranges to specify the glyphs to load.
 
-Since 1.92 (June 2025) and with an updated backend, it is not necessary to specify glyph ranges at all.
-
-Before 1.92, when loading a font, pass custom Unicode ranges to specify the glyphs to load.
 ```cpp
-// [BEFORE 1.92]
 // Add default Japanese ranges
 io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels, nullptr, io.Fonts->GetGlyphRangesJapanese());
 
@@ -859,8 +640,8 @@ Text input: it is up to your application to pass the right character code by cal
 The applications in examples/ are doing that.
 Windows: you can use the WM_CHAR or WM_UNICHAR or WM_IME_CHAR message (depending if your app is built using Unicode or MultiByte mode).
 You may also use `MultiByteToWideChar()` or `ToUnicode()` to retrieve Unicode codepoints from MultiByte characters or keyboard state.
-Windows: if your language is relying on an Input Method Editor (IME), you can write your HWND to `ImGui::GetMainViewport()->PlatformHandleRaw`
-for the default implementation of `GetPlatformIO().Platform_SetImeDataFn()` to set your Microsoft IME position correctly.
+Windows: if your language is relying on an Input Method Editor (IME), you can write your HWND to ImGui::GetMainViewport()->PlatformHandleRaw
+for the default implementation of GetPlatformIO().Platform_SetImeDataFn() to set your Microsoft IME position correctly.
 
 ##### [Return to Index](#index)
 
@@ -885,7 +666,7 @@ You may take a look at:
 
 Yes. People have written game editors, data browsers, debuggers, profilers, and all sorts of non-trivial tools with the library. In my experience, the simplicity of the API is very empowering. Your UI runs close to your live data. Make the tools always-on and everybody in the team will be inclined to create new tools (as opposed to more "offline" UI toolkits where only a fraction of your team effectively creates tools). The list of sponsors below is also an indicator that serious game teams have been using the library.
 
-Dear ImGui is very programmer-centric and the immediate-mode GUI paradigm might require you to readjust some habits before you can realize its full potential. Dear ImGui is about making things that are simple, efficient, and powerful.
+Dear ImGui is very programmer centric and the immediate-mode GUI paradigm might require you to readjust some habits before you can realize its full potential. Dear ImGui is about making things that are simple, efficient, and powerful.
 
 Dear ImGui is built to be efficient and scalable toward the needs for AAA-quality applications running all day. The IMGUI paradigm offers different opportunities for optimization than the more typical RMGUI paradigm.
 

docs/FONTS.md

@@ -2,33 +2,21 @@ _(You may browse this at https://github.com/ocornut/imgui/blob/master/docs/FONTS
 
 ## Dear ImGui: Using Fonts
 
-The code in Dear ImGui embeds a copy of [ProggyClean.ttf](https://github.com/bluescan/proggyfonts) by Tristan Grimmer,
-a 13 pixels high, pixel-perfect font used by default. ProggyClean does not scale very nicely.
+The code in imgui.cpp embeds a copy of 'ProggyClean.ttf' (by Tristan Grimmer),
+a 13 pixels high, pixel-perfect font used by default. We embed it in the source code so you can use Dear ImGui without any file system access. ProggyClean does not scale smoothly, therefore it is recommended that you load your own file when using Dear ImGui in an application aiming to look nice and wanting to support multiple resolutions.
 
-The code in Dear ImGui embeds a partial copy of [ProggyForever.ttf](https://github.com/ocornut/proggyforever) by Disco Hello & Tristan Grimmer,
-a new font mimicking ProggyClean which does scale nicely.
-
-We embed fonts in the code so you can use Dear ImGui without any file system access.
-If you don't use them you can set `IMGUI_DISABLE_DEFAULT_FONT` in your [imconfig.h](https://github.com/ocornut/imgui/blob/master/imconfig.h) file to ship binaries without the fonts and save about ~26 KB.
-
-Calling io.Fonts->AddFontDefaultVector() loads ProggyForever.
-Calling io.Fonts->AddFontDefaultBitmap() loads ProggyClean.
-Calling io.Fonts->AddFontDefault() selects one based on the expected default font size (when `style.FontSizeBase * style.FontScaleMain * style.FontSizeDpi >= 15` we use ProggyForever).
-
-You may also load external .TTF/.OTF files, see instructions on this page.
+You may also load external .TTF/.OTF files.
 In the [misc/fonts/](https://github.com/ocornut/imgui/tree/master/misc/fonts) folder you can find a few suggested fonts, provided as a convenience.
 
 **Also read the FAQ:** https://www.dearimgui.com/faq (there is a Fonts section!)
 
 ## Index
 - [Troubleshooting](#troubleshooting)
-- [New! Dynamic Fonts system in 1.92 (June 2025)](#new-dynamic-fonts-system-in-192-june-2025)
 - [How should I handle DPI in my application?](#how-should-i-handle-dpi-in-my-application)
 - [Fonts Loading Instructions](#fonts-loading-instructions)
 - [Loading Font Data from Memory](#loading-font-data-from-memory)
 - [Loading Font Data Embedded In Source Code](#loading-font-data-embedded-in-source-code)
 - [Using Icon Fonts](#using-icon-fonts)
-  - [Excluding Overlapping Ranges](#excluding-overlapping-ranges)
 - [Using FreeType Rasterizer (imgui_freetype)](#using-freetype-rasterizer-imgui_freetype)
 - [Using Colorful Glyphs/Emojis](#using-colorful-glyphsemojis)
 - [Using Custom Glyph Ranges](#using-custom-glyph-ranges)
@@ -47,7 +35,7 @@ In the [misc/fonts/](https://github.com/ocornut/imgui/tree/master/misc/fonts) fo
 
 ### (1) Invalid filename due to use of `\` or unexpected working directory.
 
-See [About Filenames](#about-filenames). AddFontXXX() functions should assert if the filename is incorrect.
+See [About Filenames](#about-filenames). AddFontXXX functions should assert if the filename is incorrect.
 
 ### (2) Invalid UTF-8 encoding of your non-ASCII strings.
 
@@ -55,18 +43,14 @@ See [About UTF-8 Encoding](#about-utf-8-encoding). Use the encoding viewer to co
 
 ### (3) Missing glyph ranges.
 
-🆕 **Since 1.92, with an up to date backend: specifying glyph ranges is unnecessary.**
+You need to load a font with explicit glyph ranges if you want to use non-ASCII characters. See [Fonts Loading Instructions](#fonts-loading-instructions). Use [Debug Tools](#debug-tools) confirm loaded fonts and loaded glyph ranges.
 
-⏪ Before 1.92: you need to load a font with explicit glyph ranges if you want to use non-ASCII characters. See [Fonts Loading Instructions](#fonts-loading-instructions). Use [Debug Tools](#debug-tools) confirm loaded fonts and loaded glyph ranges.
-
-This was a previous  constraint of Dear ImGui (lifted in 1.92): when loading a font you need to specify which characters glyphs to load.
+This is a current constraint of Dear ImGui (which we will lift in the future): when loading a font you need to specify which characters glyphs to load.
 All loaded fonts glyphs are rendered into a single texture atlas ahead of time. Calling either of `io.Fonts->GetTexDataAsAlpha8()`, `io.Fonts->GetTexDataAsRGBA32()` or `io.Fonts->Build()` will build the atlas. This is generally called by the Renderer backend, e.g. `ImGui_ImplDX11_NewFrame()` calls it. **If you use custom glyphs ranges, make sure the array is persistent** and available during the calls to `GetTexDataAsAlpha8()/GetTexDataAsRGBA32()/Build()`.
 
 ### (4) Font atlas texture fails to upload to GPU.
 
-🆕 **Since 1.92, with an up to date backend: atlas is built incrementally and dynamically resized, this is less likely to happen**
-
-:rewind: This is often of byproduct of point 3. If you have large number of glyphs or multiple fonts, the texture may become too big for your graphics API. **The typical result of failing to upload a texture is if every glyph or everything appears as empty white rectangles.** Mind the fact that some graphics drivers have texture size limitation. If you are building a PC application, mind the fact that your users may use hardware with lower limitations than yours.
+This is often of byproduct of point 3. If you have large number of glyphs or multiple fonts, the texture may become too big for your graphics API. **The typical result of failing to upload a texture is if every glyph or everything appears as empty white rectangles.** Mind the fact that some graphics drivers have texture size limitation. If you are building a PC application, mind the fact that your users may use hardware with lower limitations than yours.
 
 ![empty squares](https://github.com/user-attachments/assets/68b50fb5-8b9d-4c38-baec-6ac384f06d26)
 
@@ -76,22 +60,9 @@ Some solutions:
 - Reduce glyphs ranges by calculating them from source localization data.
   You can use the `ImFontGlyphRangesBuilder` for this purpose and rebuilding your atlas between frames when new characters are needed. This will be the biggest win!
 - Set `io.Fonts.Flags |= ImFontAtlasFlags_NoPowerOfTwoHeight;` to disable rounding the texture height to the next power of two.
+- Set `io.Fonts.TexDesiredWidth` to specify a texture width to reduce maximum texture height (see comment in `ImFontAtlas::Build()` function).
 
-##### [Return to Index](#index)
-
----------------------------------------
-
-## New! Dynamic Fonts system in 1.92 (June 2025)
-
-v1.92 introduces a newer, dynamic font system. It requires backend to support the `ImGuiBackendFlags_HasTextures` feature:
-- Users of icons, Asian and non-English languages do not need to pre-build all glyphs ahead of time. Saving on loading time, memory, and also reducing issues with missing glyphs. Specifying glyph ranges is not needed anymore.
-- `PushFont(NULL, new_size)` may be used anytime to change font size.
-- Packing custom rectangles is more convenient as pixels may be written to immediately.
-- Any update to fonts previously required backend specific calls to re-upload the texture, and said calls were not portable across backends. It is now possible to scale fonts etc. in a way that doesn't require you to make backend-specific calls.
-- It is possible to plug a custom loader/backend to any font source.
-
-See [#8465](https://github.com/ocornut/imgui/issues/8465) for more details.
-
+Future versions of Dear ImGui should solve this problem.
 
 ##### [Return to Index](#index)
 
@@ -99,10 +70,7 @@ See [#8465](https://github.com/ocornut/imgui/issues/8465) for more details.
 
 ## How should I handle DPI in my application?
 
-Since 1.92, with an updated backend, you can set `style.FontScaleDpi = your_content_scale;` to scale all fonts.
-<BR>You can call  `style.ScaleAllSizes(xxx)` at init time or every frame at the beginning of your main loop to scale sizes/paddings.
-<BR>Since 1.92, with an updated backend, macOS style pixel/backing style scale is automatically handled.
-<BR>See [FAQ entry](https://github.com/ocornut/imgui/blob/master/docs/FAQ.md#q-how-should-i-handle-dpi-in-my-application) for more details.
+See [FAQ entry](https://github.com/ocornut/imgui/blob/master/docs/FAQ.md#q-how-should-i-handle-dpi-in-my-application).
 
 ##### [Return to Index](#index)
 
@@ -110,32 +78,13 @@ Since 1.92, with an updated backend, you can set `style.FontScaleDpi = your_cont
 
 ## Fonts Loading Instructions
 
-**Select base size**
-```cpp
-ImGuiStyle& style = ImGui::GetStyle();
-style.FontSizeBase = 20.0f;
-```
-
 **Load default font:**
 ```cpp
 ImGuiIO& io = ImGui::GetIO();
-io.Fonts->AddFontDefaultVector();  // Load embedded scalable font.
-```
-```cpp
-io.Fonts->AddFontDefaultBitmap();  // Load embedded bitmap font (legacy).
-```
-```cpp
-io.Fonts->AddFontDefault();        // Load embedded font (legacy: auto-selected between the two above).
+io.Fonts->AddFontDefault();
 ```
 
 **Load .TTF/.OTF file with:**
-
-🆕 **Since 1.92, with an up to date backend: passing a size is not necessary**
-```cpp
-ImGuiIO& io = ImGui::GetIO();
-io.Fonts->AddFontFromFileTTF("font.ttf");
-```
-:rewind: **Before 1.92, or without an up to date backend:**
 ```cpp
 ImGuiIO& io = ImGui::GetIO();
 io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels);
@@ -146,14 +95,14 @@ If you get an assert stating "Could not load font file!", your font filename is
 ```cpp
 // Init
 ImGuiIO& io = ImGui::GetIO();
-ImFont* font1 = io.Fonts->AddFontFromFileTTF("font.ttf",);
-ImFont* font2 = io.Fonts->AddFontFromFileTTF("anotherfont.otf");
+ImFont* font1 = io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels);
+ImFont* font2 = io.Fonts->AddFontFromFileTTF("anotherfont.otf", size_pixels);
 ```
 
 In your application loop, select which font to use:
 ```cpp
 ImGui::Text("Hello"); // use the default font (which is the first loaded font)
-ImGui::PushFont(font2, 0.0f); // change font, keep current size
+ImGui::PushFont(font2);
 ImGui::Text("Hello with another font");
 ImGui::PopFont();
 ```
@@ -161,22 +110,13 @@ ImGui::PopFont();
 **For advanced options create a ImFontConfig structure and pass it to the AddFont() function (it will be copied internally):**
 ```cpp
 ImFontConfig config;
-config.OversampleH = 1.0f;
+config.OversampleH = 2;
+config.OversampleV = 1;
+config.GlyphExtraSpacing.x = 1.0f;
 ImFont* font = io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, &config);
 ```
 
 **Combine multiple fonts into one:**
-
-🆕 **Since 1.92, with an up to date backend: specifying glyph ranges is unnecessary.**
-```cpp
-// Load a first font
-ImFont* font = io.Fonts->AddFontDefaultVector();
-ImFontConfig config;
-config.MergeMode = true;
-io.Fonts->AddFontFromFileTTF("DroidSans.ttf", 0.0f, &config);           // Merge into first font to add e.g. Asian characters
-io.Fonts->AddFontFromFileTTF("fontawesome-webfont.ttf", 0.0f, &config); // Merge into first font to add Icons
-```
-:rewind: **Before 1.92, or without an up to date backend:**
 ```cpp
 // Load a first font
 ImFont* font = io.Fonts->AddFontDefault();
@@ -194,7 +134,6 @@ io.Fonts->Build();
 
 **Add a fourth parameter to bake specific font ranges only:**
 
-🆕 **Since 1.92, with an up to date backend: specifying glyph ranges is unnecessary. All the GetGlyphRangesXXX() functions are marked obsolete.**
 ```cpp
 // Basic Latin, Extended Latin
 io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, nullptr, io.Fonts->GetGlyphRangesDefault());
@@ -209,25 +148,17 @@ See [Using Custom Glyph Ranges](#using-custom-glyph-ranges) section to create yo
 
 **Example loading and using a Japanese font:**
 
-🆕 **Since 1.92, with an up to date backend:**
-```cpp
-ImGuiIO& io = ImGui::GetIO();
-io.Fonts->AddFontFromFileTTF("NotoSansCJKjp-Medium.otf");
-```
-
-:rewind: **Before 1.92, or without an up to date backend:**
 ```cpp
 ImGuiIO& io = ImGui::GetIO();
 io.Fonts->AddFontFromFileTTF("NotoSansCJKjp-Medium.otf", 20.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
 ```
-
 ```cpp
 ImGui::Text(u8"こんにちは！テスト %d", 123);
 if (ImGui::Button(u8"ロード"))
 {
     // do stuff
 }
-ImGui::InputText("string", buf, IM_COUNTOF(buf));
+ImGui::InputText("string", buf, IM_ARRAYSIZE(buf));
 ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
 ```
 
@@ -253,7 +184,6 @@ ImFontConfig font_cfg;
 font_cfg.FontDataOwnedByAtlas = false;
 ImFont* font = io.Fonts->AddFontFromMemoryTTF(data, data_size, size_pixels, &font_cfg);
 ```
-IMPORTANT: Since 1.92, when using `FontDataOwnedByAtlas = false`, font data needs to available until `atlas->RemoveFont()`, or more typically until a shutdown of the owning context or font atlas. It was not immediately noticeable in 1.92.0 due to a bug in handling `FontDataOwnedByAtlas = false`, which was fixed in 1.92.6.
 
 ##### [Return to Index](#index)
 
@@ -288,23 +218,11 @@ To refer to the icon UTF-8 codepoints from your C++ code, you may use those head
 
 So you can use `ICON_FA_SEARCH` as a string that will render as a "Search" icon.
 
-🆕 **Since 1.92, with an up to date backend: specifying glyph ranges is unnecessary. You can omit this parameter.**
 Example Setup:
 ```cpp
 // Merge icons into default tool font
 #include "IconsFontAwesome.h"
 ImGuiIO& io = ImGui::GetIO();
-io.Fonts->AddFontDefaultVector();
-ImFontConfig config;
-config.MergeMode = true;
-config.GlyphMinAdvanceX = 13.0f; // Use if you want to make the icon monospaced
-io.Fonts->AddFontFromFileTTF("fonts/fontawesome-webfont.ttf", 13.0f, &config);
-```
-:rewind: **Before 1.92:**
-```cpp
-// Merge icons into default tool font
-#include "IconsFontAwesome.h"
-ImGuiIO& io = ImGui::GetIO();
 io.Fonts->AddFontDefault();
 
 ImFontConfig config;
@@ -325,8 +243,7 @@ See Links below for other icons fonts and related tools.
 
 **Monospace Icons?**
 
-To make your icon look more monospace and facilitate alignment, you may want to set the `ImFontConfig::GlyphMinAdvanceX` value when loading an icon font.
-If you `GlyphMinAdvanceX` you need to pass a `font_size` to `AddFontXXX()` calls, as the MinAdvanceX value will be specified for the given size and scaled otherwise.
+To make your icon look more monospace and facilitate alignment, you may want to set the ImFontConfig::GlyphMinAdvanceX value when loading an icon font.
 
 **Screenshot**
 
@@ -337,49 +254,11 @@ Here's an application using icons ("Avoyd", https://www.avoyd.com):
 
 ---------------------------------------
 
-### Excluding Overlapping Ranges
-
-🆕 **Since 1.92, with an up to date backend: glyphs ranges are ignored**: when loading a glyph, input fonts in the merge list are queried in order. The first font which has the glyph loads it.
-<BR>‼️ **If you are merging several fonts, you may have undesirable overlapping ranges.** You can use `ImFontConfig::GlyphExcludeRanges[] `to specify ranges to ignore in a given Input.
-
-```cpp
-// Add Font Source 1 but ignore ICON_MIN_FA..ICON_MAX_FA range
-static ImWchar exclude_ranges[] = { ICON_MIN_FA, ICON_MAX_FA, 0 };
-ImFontConfig cfg1;
-cfg1.GlyphExcludeRanges = exclude_ranges;
-io.Fonts->AddFontFromFileTTF("segoeui.ttf", 0.0f, &cfg1);
-
-// Add Font Source 2, which expects to use the range above
-ImFontConfig cfg2;
-cfg2.MergeMode = true;
-io.Fonts->AddFontFromFileTTF("FontAwesome4.ttf", 0.0f, &cfg2);
-```
-Another (silly) example:
-```cpp
-// Remove 'A'-'Z' from first font
-static ImWchar exclude_ranges[] = { 'A', 'Z', 0 };
-ImFontConfig cfg1;
-cfg1.GlyphExcludeRanges = exclude_ranges;
-io.Fonts->AddFontFromFileTTF("segoeui.ttf", 0.0f, &cfg1);
-
-// Load another font to fill the gaps
-ImFontConfig cfg2;
-cfg2.MergeMode = true;
-io.Fonts->AddFontFromFileTTF("Roboto-Medium.ttf", 0.0f, &cfg2);
-```
-![image](https://github.com/user-attachments/assets/f3d751d3-1aee-4698-bd9b-f511902f56bb)
-
-You can use `Metrics/Debugger->Fonts->Font->Input Glyphs Overlap Detection Tool` to see list of glyphs available in multiple font sources. This can facilitate understanding which font input is providing which glyph.
-
-##### [Return to Index](#index)
-
----------------------------------------
-
 ## Using FreeType Rasterizer (imgui_freetype)
 
-- Dear ImGui uses [stb_truetype.h](https://github.com/nothings/stb/) to rasterize fonts (with optional oversampling). This technique and its implementation are not ideal for fonts rendered at small sizes, which may appear a little blurry or hard to read.
-- You can however use `imgui_freetype.cpp` from the [misc/freetype/](https://github.com/ocornut/imgui/tree/master/misc/freetype) folder. Compile with this file and add `#define IMGUI_ENABLE_FREETYPE` to your imconfig.h file or build system to automatically activate it.
-- FreeType supports auto-hinting which tends to improve the readability of small fonts. It makes a big difference especially at smaller resolutions.
+- Dear ImGui uses imstb\_truetype.h to rasterize fonts (with optional oversampling). This technique and its implementation are not ideal for fonts rendered at small sizes, which may appear a little blurry or hard to read.
+- There is an implementation of the ImFontAtlas builder using FreeType that you can use in the [misc/freetype/](https://github.com/ocornut/imgui/tree/master/misc/freetype) folder.
+- FreeType supports auto-hinting which tends to improve the readability of small fonts.
 - Read documentation in the [misc/freetype/](https://github.com/ocornut/imgui/tree/master/misc/freetype) folder.
 - Correct sRGB space blending will have an important effect on your font rendering quality.
 
@@ -401,9 +280,10 @@ You can use `Metrics/Debugger->Fonts->Font->Input Glyphs Overlap Detection Tool`
 io.Fonts->AddFontFromFileTTF("../../../imgui_dev/data/fonts/NotoSans-Regular.ttf", 16.0f);
 static ImWchar ranges[] = { 0x1, 0x1FFFF, 0 };
 static ImFontConfig cfg;
+cfg.OversampleH = cfg.OversampleV = 1;
 cfg.MergeMode = true;
-cfg.FontLoaderFlags |= ImGuiFreeTypeLoaderFlags_LoadColor;
-io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\seguiemj.ttf", 16.0f, &cfg);
+cfg.FontBuilderFlags |= ImGuiFreeTypeBuilderFlags_LoadColor;
+io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\seguiemj.ttf", 16.0f, &cfg, ranges);
 ```
 
 ##### [Return to Index](#index)
@@ -412,9 +292,7 @@ io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\seguiemj.ttf", 16.0f, &cfg);
 
 ## Using Custom Glyph Ranges
 
-🆕 **Since 1.92, with an up to date backend: specifying glyph ranges is unnecessary. Therefore this is not really useful any more.**
-
-:rewind: You can use the `ImFontGlyphRangesBuilder` helper to create glyph ranges based on text input. For example: for a game where your script is known, if you can feed your entire script to it and only build the characters the game needs.
+You can use the `ImFontGlyphRangesBuilder` helper to create glyph ranges based on text input. For example: for a game where your script is known, if you can feed your entire script to it and only build the characters the game needs.
 ```cpp
 ImVector<ImWchar> ranges;
 ImFontGlyphRangesBuilder builder;
@@ -433,25 +311,16 @@ io.Fonts->Build();                                     // Build the atlas while
 
 ## Using Custom Colorful Icons
 
-🆕 **Since 1.92, with an up to date backend: this system has been revamped.**
-
-TL;DR; With the new system, it is recommended that you create a custom `ImFontLoader` and register your fonts with it.
-`AddCustomRectFontGlyph()` has been obsoleted because its API does not make much sense with resizable fonts.
-
-You can ask questions in [#8466](https://github.com/ocornut/imgui/issues/8466).
-
-:rewind: **Before 1.92:**
-
 As an alternative to rendering colorful glyphs using imgui_freetype with `ImGuiFreeTypeBuilderFlags_LoadColor`, you may allocate your own space in the texture atlas and write yourself into it. **(This is a BETA api, use if you are familiar with dear imgui and with your rendering backend)**
 
 - You can use the `ImFontAtlas::AddCustomRect()` and `ImFontAtlas::AddCustomRectFontGlyph()` api to register rectangles that will be packed into the font atlas texture. Register them before building the atlas, then call Build()`.
-- You can then use `ImFontAtlas::GetCustomRect(int)` to query the position/size of your rectangle within the texture, and blit/copy any graphics data of your choice into those rectangles.
+- You can then use `ImFontAtlas::GetCustomRectByIndex(int)` to query the position/size of your rectangle within the texture, and blit/copy any graphics data of your choice into those rectangles.
 - This API is beta because it is likely to change in order to support multi-dpi (multiple viewports on multiple monitors with varying DPI scale).
 
 #### Pseudo-code:
 ```cpp
 // Add font, then register two custom 13x13 rectangles mapped to glyph 'a' and 'b' of this font
-ImFont* font = io.Fonts->AddFontDefaultVector();
+ImFont* font = io.Fonts->AddFontDefault();
 int rect_ids[2];
 rect_ids[0] = io.Fonts->AddCustomRectFontGlyph(font, 'a', 13, 13, 13+1);
 rect_ids[1] = io.Fonts->AddCustomRectFontGlyph(font, 'b', 13, 13, 13+1);
@@ -464,8 +333,10 @@ unsigned char* tex_pixels = nullptr;
 int tex_width, tex_height;
 io.Fonts->GetTexDataAsRGBA32(&tex_pixels, &tex_width, &tex_height);
 
-for (int rect_n = 0; rect_n < IM_COUNTOF(rect_ids); rect_n++)
-    if (const ImTextureRect* rect = io.Fonts->GetCustomRect(rect_ids[rect_n]))
+for (int rect_n = 0; rect_n < IM_ARRAYSIZE(rect_ids); rect_n++)
+{
+    int rect_id = rect_ids[rect_n];
+    if (const ImFontAtlasCustomRect* rect = io.Fonts->GetCustomRectByIndex(rect_id))
     {
         // Fill the custom rectangle with red pixels (in reality you would draw/copy your bitmap data here!)
         for (int y = 0; y < rect->Height; y++)
@@ -475,6 +346,7 @@ for (int rect_n = 0; rect_n < IM_COUNTOF(rect_ids); rect_n++)
                 *p++ = IM_COL32(255, 0, 0, 255);
         }
     }
+}
 ```
 
 ##### [Return to Index](#index)
@@ -564,20 +436,7 @@ You can use the `UTF-8 Encoding viewer` in `Metrics/Debugger` to verify the cont
 
 ## Credits/Licenses For Fonts Included In Repository
 
-Embedded in source code:
-
-**ProggyClean.ttf**, by Tristan Grimmer
-<br>MIT License
-<br>(recommended loading setting: Size = 13.0, GlyphOffset.y = +1, PixelSnapH = true)
-<br>https://github.com/bluescan/proggyfonts
-
-**ProggyForever.ttf**, by Disco Hello, Tristan Grimmer
-<BR>MIT License
-<BR>https://github.com/ocornut/proggyforever
-
-Extra fonts files are available in the `misc/fonts/` folder.
-Compared to 2014 when they were first introduced, we now have better font support and we embed ProggyForever.
-I believe all the files here are unnecessary nowadays. You can find font yourself. They might eventually be removed.
+Some fonts files are available in the `misc/fonts/` folder:
 
 **Roboto-Medium.ttf**, by Christian Robetson
 <br>Apache License 2.0
@@ -592,10 +451,15 @@ I believe all the files here are unnecessary nowadays. You can find font yoursel
 <br>Apache License 2.0
 <br>https://www.fontsquirrel.com/fonts/droid-sans
 
+**ProggyClean.ttf**, by Tristan Grimmer
+<br>MIT License
+<br>(recommended loading setting: Size = 13.0, GlyphOffset.y = +1)
+<br>http://www.proggyfonts.net/
+
 **ProggyTiny.ttf**, by Tristan Grimmer
 <br>MIT License
 <br>(recommended loading setting: Size = 10.0, GlyphOffset.y = +1)
-<br>https://github.com/bluescan/proggyfonts
+<br>http://www.proggyfonts.net/
 
 **Karla-Regular.ttf**, by Jonathan Pinhorn
 <br>SIL OPEN FONT LICENSE Version 1.1
@@ -621,14 +485,15 @@ I believe all the files here are unnecessary nowadays. You can find font yoursel
 
 #### MONOSPACE FONTS
 
-<img width="1172" height="715" alt="image" src="https://github.com/user-attachments/assets/c9702534-4877-41c9-ae0d-252933c26ced" />
+Pixel Perfect:
+- Proggy Fonts, by Tristan Grimmer http://www.proggyfonts.net or http://upperboundsinteractive.com/fonts.php
+- Sweet16, Sweet16 Mono, by Martin Sedlak (Latin + Supplemental + Extended A) https://github.com/kmar/Sweet16Font (also include an .inl file to use directly in dear imgui.)
 
-- Proggy Fonts, by Tristan Grimmer https://github.com/bluescan/proggyfonts
-- Sweet16, Sweet16 Mono, by Martin Sedlak (Latin + Supplemental + Extended A) https://github.com/kmar/Sweet16Font
-- Google Noto Mono Fonts: https://www.google.com/get/noto/
-- Typefaces for source code beautification: https://github.com/chrissimpkins/codeface
-- Programmation fonts: http://s9w.github.io/font_compare/
-- Inconsolata: http://www.levien.com/type/myfonts/inconsolata.html
+Regular:
+- Google Noto Mono Fonts https://www.google.com/get/noto/
+- Typefaces for source code beautification https://github.com/chrissimpkins/codeface
+- Programmation fonts http://s9w.github.io/font_compare/
+- Inconsolata http://www.levien.com/type/myfonts/inconsolata.html
 - Adobe Source Code Pro: Monospaced font family for ui & coding environments https://github.com/adobe-fonts/source-code-pro
 - Monospace/Fixed Width Programmer's Fonts http://www.lowing.org/fonts/
 

docs/README.md

@@ -16,7 +16,7 @@ Businesses: support continued development and maintenance via invoiced sponsorin
 | [The Pitch](#the-pitch) - [Usage](#usage) - [How it works](#how-it-works) - [Releases & Changelogs](#releases--changelogs) - [Demo](#demo) - [Getting Started & Integration](#getting-started--integration) |
 :----------------------------------------------------------: |
 | [Gallery](#gallery) - [Support, FAQ](#support-frequently-asked-questions-faq) -  [How to help](#how-to-help) - **[Funding & Sponsors](https://github.com/ocornut/imgui/wiki/Funding)** - [Credits](#credits) - [License](#license) |
-| [Wiki](https://github.com/ocornut/imgui/wiki) - [Extensions](https://github.com/ocornut/imgui/wiki/Useful-Extensions) - [Language bindings & framework backends](https://github.com/ocornut/imgui/wiki/Bindings) - [Software using Dear ImGui](https://github.com/ocornut/imgui/wiki/Software-using-dear-imgui) - [User quotes](https://github.com/ocornut/imgui/wiki/Quotes) |
+| [Wiki](https://github.com/ocornut/imgui/wiki) - [Extensions](https://github.com/ocornut/imgui/wiki/Useful-Extensions) - [Languages bindings & frameworks backends](https://github.com/ocornut/imgui/wiki/Bindings) - [Software using Dear ImGui](https://github.com/ocornut/imgui/wiki/Software-using-dear-imgui) - [User quotes](https://github.com/ocornut/imgui/wiki/Quotes) |
 
 ### The Pitch
 
@@ -39,12 +39,10 @@ Dear ImGui is particularly suited to integration in game engines (for tooling),
 
 ### Usage
 
-**The core of Dear ImGui is self-contained within a few platform-agnostic files** which you can easily compile in your application/engine. They are all the files in the root folder of the repository (`imgui*.cpp`, `imgui*.h`). **No specific build process is required**: you can add all files into your existing project.
+**The core of Dear ImGui is self-contained within a few platform-agnostic files** which you can easily compile in your application/engine. They are all the files in the root folder of the repository (imgui*.cpp, imgui*.h). **No specific build process is required**. You can add the .cpp files into your existing project.
 
 **Backends for a variety of graphics API and rendering platforms** are provided in the [backends/](https://github.com/ocornut/imgui/tree/master/backends) folder, along with example applications in the [examples/](https://github.com/ocornut/imgui/tree/master/examples) folder. You may also create your own backend. Anywhere where you can render textured triangles, you can render Dear ImGui.
 
-C++20 users wishing to use a module may the use [stripe2933/imgui-module](https://github.com/stripe2933/imgui-module) third-party extension.
-
 See the [Getting Started & Integration](#getting-started--integration) section of this document for more details.
 
 After Dear ImGui is set up in your application, you can use it from \_anywhere\_ in your program loop:
@@ -52,11 +50,11 @@ After Dear ImGui is set up in your application, you can use it from \_anywhere\_
 ImGui::Text("Hello, world %d", 123);
 if (ImGui::Button("Save"))
     MySaveFunction();
-ImGui::InputText("string", buf, IM_COUNTOF(buf));
+ImGui::InputText("string", buf, IM_ARRAYSIZE(buf));
 ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
 ```
-<img width="412" height="236" alt="sample code output (dark)" src="https://github.com/user-attachments/assets/32b838df-6378-498b-84a8-9a79ee6264a7" />
-<img width="412" height="236" alt="sample code output (light)" src="https://github.com/user-attachments/assets/f075e2b0-98de-4be8-acb4-99ba0c9966cd" />
+![sample code output (dark, segoeui font, freetype)](https://user-images.githubusercontent.com/8225057/191050833-b7ecf528-bfae-4a9f-ac1b-f3d83437a2f4.png)
+![sample code output (light, segoeui font, freetype)](https://user-images.githubusercontent.com/8225057/191050838-8742efd4-504d-4334-a9a2-e756d15bc2ab.png)
 
 ```cpp
 // Create a window called "My First Tool", with a menu bar.
@@ -90,7 +88,7 @@ for (int n = 0; n < 50; n++)
 ImGui::EndChild();
 ImGui::End();
 ```
-![my_first_tool_v192 6](https://github.com/user-attachments/assets/6c76658c-302f-403b-af26-d517e2bfb0d4)
+![my_first_tool_v188](https://user-images.githubusercontent.com/8225057/191055698-690a5651-458f-4856-b5a9-e8cc95c543e2.gif)
 
 Dear ImGui allows you to **create elaborate tools** as well as very short-lived ones. On the extreme side of short-livedness: using the Edit&Continue (hot code reload) feature of modern compilers you can add a few widgets to tweak variables while your application is running, and remove the code a minute later! Dear ImGui is not just for tweaking values. You can use it to trace a running algorithm by just emitting text commands. You can use it along with your own reflection data to browse your dataset live. You can use it to expose the internals of a subsystem in your engine, to create a logger, an inspection tool, a profiler, a debugger, an entire game-making editor/framework, etc.
 
@@ -109,11 +107,35 @@ Reading the changelogs is a good way to keep up to date with the things Dear ImG
 
 ### Demo
 
-Calling the `ImGui::ShowDemoWindow()` function will create a demo window showcasing a variety of features and examples. The code is always available for reference in `imgui_demo.cpp`. 
-- [imgui_explorer](https://pthom.github.io/imgui_explorer): Web version of the demo w/ source code browser, courtesy of [@pthom](https://github.com/pthom).
+Calling the `ImGui::ShowDemoWindow()` function will create a demo window showcasing a variety of features and examples. The code is always available for reference in `imgui_demo.cpp`. [Here's how the demo looks](https://raw.githubusercontent.com/wiki/ocornut/imgui/web/v167/v167-misc.png).
 
 You should be able to build the examples from sources. If you don't, let us know! If you want to have a quick look at some Dear ImGui features, you can download Windows binaries of the demo app here:
-- [imgui-demo-binaries-20260225.zip](https://www.dearimgui.com/binaries/imgui-demo-binaries-20260225.zip) (Windows, 1.92.6, built 2026/02/25, master) or [older binaries](https://www.dearimgui.com/binaries).
+- [imgui-demo-binaries-20241211.zip](https://www.dearimgui.com/binaries/imgui-demo-binaries-20241211.zip) (Windows, 1.91.6, built 2024/11/11, master) or [older binaries](https://www.dearimgui.com/binaries).
+
+The demo applications are not DPI aware so expect some blurriness on a 4K screen. For DPI awareness in your application, you can load/reload your font at a different scale and scale your style with `style.ScaleAllSizes()` (see [FAQ](https://www.dearimgui.com/faq)).
+
+### Getting Started & Integration
+
+See the [Getting Started](https://github.com/ocornut/imgui/wiki/Getting-Started) guide for details.
+
+On most platforms and when using C++, **you should be able to use a combination of the [imgui_impl_xxxx](https://github.com/ocornut/imgui/tree/master/backends) backends without modification** (e.g. `imgui_impl_win32.cpp` + `imgui_impl_dx11.cpp`). If your engine supports multiple platforms, consider using more imgui_impl_xxxx files instead of rewriting them: this will be less work for you, and you can get Dear ImGui running immediately. You can _later_ decide to rewrite a custom backend using your custom engine functions if you wish so.
+
+Integrating Dear ImGui within your custom engine is a matter of 1) wiring mouse/keyboard/gamepad inputs 2) uploading a texture to your GPU/render engine 3) providing a render function that can bind textures and render textured triangles, which is essentially what Backends are doing. The [examples/](https://github.com/ocornut/imgui/tree/master/examples) folder is populated with applications doing just that: setting up a window and using backends. If you follow the [Getting Started](https://github.com/ocornut/imgui/wiki/Getting-Started) guide it should in theory takes you less than an hour to integrate Dear ImGui.  **Make sure to spend time reading the [FAQ](https://www.dearimgui.com/faq), comments, and the examples applications!**
+
+Officially maintained backends/bindings (in repository):
+- Renderers: DirectX9, DirectX10, DirectX11, DirectX12, Metal, OpenGL/ES/ES2, SDL_GPU, SDL_Renderer2/3, Vulkan, WebGPU.
+- Platforms: GLFW, SDL2/SDL3, Win32, Glut, OSX, Android.
+- Frameworks: Allegro5, Emscripten.
+
+[Third-party backends/bindings](https://github.com/ocornut/imgui/wiki/Bindings) wiki page:
+- Languages: C, C# and: Beef, ChaiScript, CovScript, Crystal, D, Go, Haskell, Haxe/hxcpp, Java, JavaScript, Julia, Kotlin, Lobster, Lua, Nim, Odin, Pascal, PureBasic, Python, ReaScript, Ruby, Rust, Swift, Zig...
+- Frameworks: AGS/Adventure Game Studio, Amethyst, Blender, bsf, Cinder, Cocos2d-x, Defold, Diligent Engine, Ebiten, Flexium, GML/Game Maker Studio, GLEQ, Godot, GTK3, Irrlicht Engine, JUCE, LÖVE+LUA, Mach Engine, Magnum, Marmalade, Monogame, NanoRT, nCine, Nim Game Lib, Nintendo 3DS/Switch/WiiU (homebrew), Ogre, openFrameworks, OSG/OpenSceneGraph, Orx, Photoshop, px_render, Qt/QtDirect3D, raylib, SFML, Sokol, Unity, Unreal Engine 4/5, UWP, vtk, VulkanHpp, VulkanSceneGraph, Win32 GDI, WxWidgets.
+- Many bindings are auto-generated (by good old [cimgui](https://github.com/cimgui/cimgui) or newer/experimental [dear_bindings](https://github.com/dearimgui/dear_bindings)), you can use their metadata output to generate bindings for other languages.
+
+[Useful Extensions/Widgets](https://github.com/ocornut/imgui/wiki/Useful-Extensions) wiki page:
+- Automation/testing, Text editors, node editors, timeline editors, plotting, software renderers, remote network access, memory editors, gizmos, etc. Notable and well supported extensions include [ImPlot](https://github.com/epezent/implot) and [Dear ImGui Test Engine](https://github.com/ocornut/imgui_test_engine).
+
+Also see [Wiki](https://github.com/ocornut/imgui/wiki) for more links and ideas.
 
 ### Gallery
 
@@ -128,35 +150,6 @@ For a list of third-party widgets and extensions, check out the [Useful Extensio
 | Custom engine [erhe](https://github.com/tksuoran/erhe) (docking branch)<BR>[![erhe](https://user-images.githubusercontent.com/8225057/190203358-6988b846-0686-480e-8663-1311fbd18abd.jpg)](https://user-images.githubusercontent.com/994606/147875067-a848991e-2ad2-4fd3-bf71-4aeb8a547bcf.png) | Custom engine for [Wonder Boy: The Dragon's Trap](http://www.TheDragonsTrap.com) (2017)<BR>[![the dragon's trap](https://user-images.githubusercontent.com/8225057/190203379-57fcb80e-4aec-4fec-959e-17ddd3cd71e5.jpg)](https://cloud.githubusercontent.com/assets/8225057/20628927/33e14cac-b329-11e6-80f6-9524e93b048a.png) |
 | Custom engine (untitled)<BR>[![editor white](https://user-images.githubusercontent.com/8225057/190203393-c5ac9f22-b900-4d1e-bfeb-6027c63e3d92.jpg)](https://raw.githubusercontent.com/wiki/ocornut/imgui/web/v160/editor_white.png) | Tracy Profiler ([github](https://github.com/wolfpld/tracy))<BR>[![tracy profiler](https://user-images.githubusercontent.com/8225057/190203401-7b595f6e-607c-44d3-97ea-4c2673244dfb.jpg)](https://raw.githubusercontent.com/wiki/ocornut/imgui/web/v176/tracy_profiler.png) |
 
-### Getting Started & Integration
-
-See the [Getting Started](https://github.com/ocornut/imgui/wiki/Getting-Started) guide for details.
-
-On most platforms and when using C++, **you should be able to use a combination of the [imgui_impl_xxxx](https://github.com/ocornut/imgui/tree/master/backends) backends without modification** (e.g. `imgui_impl_win32.cpp` + `imgui_impl_dx11.cpp`). If your engine supports multiple platforms, consider using more imgui_impl_xxxx files instead of rewriting them: this will be less work for you, and you can get Dear ImGui running immediately. You can _later_ decide to rewrite a custom backend using your custom engine functions if you wish so.
-
-Integrating Dear ImGui within your custom engine is a matter of mainly 1) wiring mouse/keyboard/gamepad inputs 2) uploading a texture to your GPU/render engine 3) providing a render function that can create/update textures and render textured triangles. This is exactly what backends are doing.
-- The [examples/](https://github.com/ocornut/imgui/tree/master/examples) folder is populated with applications setting up a window and using standard backends.
-- The [Getting Started](https://github.com/ocornut/imgui/wiki/Getting-Started) guide has instructions to integrate imgui into an existing application using standard backends. It should in theory take you less than an hour to integrate Dear ImGui into your existing codebase where support libraries are linked. Less if you read carefully.
-- The [Backends](https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md) guide explains what backends are doing, and has instructions to implement a custom backend. You can also refer to the source code of our ~20 backends to understand how they work.
-- Generally, **make sure to spend time reading the [FAQ](https://www.dearimgui.com/faq), comments, and the examples applications!**
-
-Officially maintained backends (in repository):
-- Renderers: DirectX9, DirectX10, DirectX11, DirectX12, Metal, OpenGL/ES/ES2, SDL_GPU, SDL_Renderer2/3, Vulkan, WebGPU.
-- Platforms: GLFW, SDL2/SDL3, Win32, Glut, OSX, Android.
-- Frameworks: Allegro5, Emscripten.
-
-[Third-party backends/bindings](https://github.com/ocornut/imgui/wiki/Bindings) wiki page:
-- Languages: C, C# and: Beef, ChaiScript, CovScript, Crystal, D, Go, Haskell, Haxe/hxcpp, Java, JavaScript, Julia, Kotlin, Lobster, Lua, Nim, Odin, Pascal, PureBasic, Python, ReaScript, Ruby, Rust, Swift, Zig...
-- Frameworks: AGS/Adventure Game Studio, Amethyst, Blender, bsf, Cinder, Cocos2d-x, Defold, Diligent Engine, Ebiten, Flexium, GML/Game Maker Studio, GLEQ, Godot, GTK3, Irrlicht Engine, JUCE, LÖVE+LUA, Mach Engine, Magnum, Marmalade, Monogame, NanoRT, nCine, Nim Game Lib, Nintendo 3DS/Switch/WiiU (homebrew), Ogre, openFrameworks, OSG/OpenSceneGraph, Orx, Photoshop, px_render, Qt/QtDirect3D, raylib, SFML, Sokol, Unity, Unreal Engine 4/5, UWP, vtk, VulkanHpp, VulkanSceneGraph, Win32 GDI, WxWidgets.
-- Many bindings are auto-generated (by good old [cimgui](https://github.com/cimgui/cimgui) or our newer [dear_bindings](https://github.com/dearimgui/dear_bindings)), you can use their metadata output to generate bindings for other languages.
-
-[Useful Extensions/Widgets](https://github.com/ocornut/imgui/wiki/Useful-Extensions) wiki page:
-
-[![Useful extensions thumbnails](https://github.com/user-attachments/assets/e6b0aa7c-bf53-41c5-ac69-bea3098b1dee)](https://github.com/ocornut/imgui/wiki/Useful-Extensions) 
-- Automation/testing, Text editors, node editors, timeline editors, plotting, software renderers, remote network access, memory editors, gizmos, etc. Notable and well supported extensions include [ImPlot](https://github.com/epezent/implot), [ImPlot3d](https://github.com/brenocq/implot3d) and [Dear ImGui Test Engine](https://github.com/ocornut/imgui_test_engine).
-
-Also see [Wiki](https://github.com/ocornut/imgui/wiki) for more links and ideas.
-
 ### Support, Frequently Asked Questions (FAQ)
 
 See: [Frequently Asked Questions (FAQ)](https://github.com/ocornut/imgui/blob/master/docs/FAQ.md) where common questions are answered.
@@ -191,7 +184,7 @@ How to help
 - See [GitHub Forum/Issues](https://github.com/ocornut/imgui/issues).
 - You may help with development and submit pull requests! Please understand that by submitting a PR you are also submitting a request for the maintainer to review your code and then take over its maintenance forever. PR should be crafted both in the interest of the end-users and also to ease the maintainer into understanding and accepting it.
 - See [Help wanted](https://github.com/ocornut/imgui/wiki/Help-Wanted) on the [Wiki](https://github.com/ocornut/imgui/wiki/) for some more ideas.
-- Be a [Funding Supporter](https://github.com/ocornut/imgui/wiki/Funding)! Have your company financially support this project via invoiced sponsors/maintenance or by buying a license for [Dear ImGui Test Engine](https://github.com/ocornut/imgui_test_engine) (please reach out: contact AT dearimgui DOT com).
+- Be a [Funding Supporter](https://github.com/ocornut/imgui/wiki/Funding)! Have your company financially support this project via invoiced sponsors/maintenance or by buying a license for [Dear ImGui Test Engine](https://github.com/ocornut/imgui_test_engine) (please reach out: omar AT dearimgui DOT com).
 
 Sponsors
 --------
@@ -210,7 +203,7 @@ Dear ImGui is using software and services provided free of charge for open sourc
 Credits
 -------
 
-Developed by [Omar Cornut](https://www.miracleworld.net) and every direct or indirect [contributors](https://github.com/ocornut/imgui/graphs/contributors) to the GitHub. The early version of this library was developed with the support of [Media Molecule](https://www.mediamolecule.com) and first used internally on the game [Tearaway](https://youtu.be/w0oxBviRGlU) (PS Vita).
+Developed by [Omar Cornut](https://www.miracleworld.net) and every direct or indirect [contributors](https://github.com/ocornut/imgui/graphs/contributors) to the GitHub. The early version of this library was developed with the support of [Media Molecule](https://www.mediamolecule.com) and first used internally on the game [Tearaway](https://tearaway.mediamolecule.com) (PS Vita).
 
 Recurring contributors include Rokas Kupstys [@rokups](https://github.com/rokups) (2020-2022): a good portion of work on automation system and regression tests now available in [Dear ImGui Test Engine](https://github.com/ocornut/imgui_test_engine).
 
@@ -218,11 +211,10 @@ Maintenance/support contracts, sponsoring invoices and other B2B transactions ar
 
 Omar: "I first discovered the IMGUI paradigm at [Q-Games](https://www.q-games.com) where Atman Binstock had dropped his own simple implementation in the codebase, which I spent quite some time improving and thinking about. It turned out that Atman was exposed to the concept directly by working with Casey. When I moved to Media Molecule I rewrote a new library trying to overcome the flaws and limitations of the first one I've worked with. It became this library and since then I have spent an unreasonable amount of time iterating and improving it."
 
-Embeds [ProggyClean](https://www.proggyfonts.net) font by Tristan Grimmer (MIT license).
-<br>Embeds [ProggyForever](https://github.com/ocornut/proggyforever) fonts by Disco Hello, Tristan Grimmer (MIT license).
+Embeds [ProggyClean.ttf](https://www.proggyfonts.net) font by Tristan Grimmer (MIT license).
 <br>Embeds [stb_textedit.h, stb_truetype.h, stb_rect_pack.h](https://github.com/nothings/stb/) by Sean Barrett (public domain).
 
-Inspiration, feedback, and testing for early versions: Casey Muratori, Atman Binstock, Mikko Mononen, Emmanuel Briney, Stefan Kamoda, Anton Mikhailov, Matt Willis. Special thanks to Alex Evans, Patrick Doane, Marco Koegler for kindly helping. Also thank you to everyone posting feedback, questions and patches on GitHub.
+Inspiration, feedback, and testing for early versions: Casey Muratori, Atman Binstock, Mikko Mononen, Emmanuel Briney, Stefan Kamoda, Anton Mikhailov, Matt Willis. Also thank you to everyone posting feedback, questions and patches on GitHub.
 
 License
 -------

docs/TODO.txt

@@ -2,16 +2,14 @@ dear imgui
 ISSUES & TODO LIST
 
 Issue numbers (#) refer to GitHub issues listed at https://github.com/ocornut/imgui/issues/XXXX
-
 THIS LIST IS NOT WELL MAINTAINED. MOST OF THE WORK HAPPENS ON GITHUB NOWADAYS.
-
 The list below consist mostly of ideas noted down before they are requested/discussed by users (at which point they usually exist on the github issue tracker).
 It's mostly a bunch of personal notes, probably incomplete. Feel free to query if you have any questions.
 
- - doc: checklist app to verify backends/integration of imgui (test inputs, rendering, callback, etc.).
  - doc: add a proper documentation system (maybe relying on automation? #435)
+ - doc: checklist app to verify backends/integration of imgui (test inputs, rendering, callback, etc.).
  - doc/tips: tips of the day: website? applet in imgui_club?
-
+ 
  - window: preserve/restore relative focus ordering (persistent or not), and e.g. of multiple reappearing windows (#2304) -> also see docking reference to same #.
  - window: calling SetNextWindowSize() every frame with <= 0 doesn't do anything, may be useful to allow (particularly when used for a single axis). (#690)
  - window: add a way for very transient windows (non-saved, temporary overlay over hundreds of objects) to "clean" up from the global window list. perhaps a lightweight explicit cleanup pass.
@@ -24,16 +22,19 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - window: using SetWindowPos() inside Begin() and moving the window with the mouse reacts a very ugly glitch. We should just defer the SetWindowPos() call.
  - window: GetWindowSize() returns (0,0) when not calculated? (#1045)
  - window: investigate better auto-positioning for new windows.
- - window: top most window flag? more z-order control? (#2574)
+ - window: top most window flag? more z-order contrl? (#2574)
  - window/size: manually triggered auto-fit (double-click on grip) shouldn't resize window down to viewport size?
  - window/size: how to allow to e.g. auto-size vertically to fit contents, but be horizontally resizable? Assuming SetNextWindowSize() is modified to treat -1.0f on each axis as "keep as-is" (would be good but might break erroneous code): Problem is UpdateWindowManualResize() and lots of code treat (window->AutoFitFramesX > 0 || window->AutoFitFramesY > 0) together.
  - window/opt: freeze window flag: if not focused/hovered, return false, render with previous ImDrawList. and/or reduce refresh rate. -> this may require enforcing that it is illegal to submit contents if Begin returns false.
+ - window/child: background options for child windows, border option (disable rounding).
+ - window/child: allow resizing of child windows (possibly given min/max for each axis?.)
+ - window/child: allow SetNextWindowContentSize() to work on child windows.
  - window/clipping: some form of clipping when DisplaySize (or corresponding viewport) is zero.
  - window/tabbing: add a way to signify that a window or docked window requires attention (e.g. blinking title bar, trying to click behind a modal).
  - window/id_stack: add e.g. window->GetIDFromPath() with support for leading / and ../ (#1390, #331) -> model from test engine.
-
- ! scrolling: exposing horizontal scrolling with Shift+Wheel even when scrollbar is disabled expose various issues (#2424, #1463)
+ ! scrolling: exposing horizontal scrolling with Shift+Wheel even when scrollbar is disabled expose lots of issues (#2424, #1463)
  - scrolling: while holding down a scrollbar, try to keep the same contents visible (at least while not moving mouse)
+ - scrolling: allow immediately effective change of scroll after Begin() if we haven't appended items yet.
  - scrolling: forward mouse wheel scrolling to parent window when at the edge of scrolling limits? (useful for listbox,tables?)
  - scrolling/style: shadows on scrollable areas to denote that there is more contents (see e.g. DaVinci Resolve ui)
 
@@ -53,36 +54,43 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - widgets: display mode: widget-label, label-widget (aligned on column or using fixed size), label-newline-tab-widget etc. (#395)
  - widgets: clean up widgets internal toward exposing everything and stabilizing imgui_internals.h.
  - widgets: add always-allow-overlap mode. This should perhaps be the default? one problem is that highlight after mouse-wheel scrolling gets deferred, makes scrolling more flickery.
+ - widgets: start exposing PushItemFlag() and ImGuiItemFlags
  - widgets: alignment options in style (e.g. center Selectable, Right-Align within Button, etc.) #1260
  - widgets: activate by identifier (trigger button, focus given id)
- - widgets: custom glyph/shapes replacements for stock shapes. (also #6090 #2431 #2235 #6517)
+ - widgets: custom glyph/shapes replacements for stock sapes. (also #6090 #2431 #2235 #6517)
  - widgets: coloredit: keep reporting as active when picker is on?
- - widgets: group/ScalarN functions: expose more per-component information. e.g. store NextItemData.ComponentIdx set by scalarn function, groups can expose them back somehow.
+ - widgets: group/scalarn functions: expose more per-component information. e.g. store NextItemData.ComponentIdx set by scalarn function, groups can expose them back somehow.
  - selectable: using (size.x == 0.0f) and (SelectableTextAlign.x > 0.0f) followed by SameLine() is currently not supported.
  - selectable: generic BeginSelectable()/EndSelectable() mechanism. (work out alongside range-select branch)
  - selectable: a way to visualize partial/mixed selection (e.g. parent tree node has children with mixed selection)
 
- - input text: flag to disable live update of the user buffer (also applies to float/int text input) (#701)
  - input text: preserve scrolling when unfocused?
  - input text: reorganize event handling, allow CharFilter to modify buffers, allow multiple events? (#541)
+ - input text: expose CursorPos in char filter event (#816)
+ - input text: try usage idiom of using InputText with data only exposed through get/set accessors, without extraneous copy/alloc. (#3009)
+ - input text: access public fields via a non-callback API e.g. InputTextGetState("xxx") that may return nullptr if not active (available in internals)
+ - input text: flag to disable live update of the user buffer (also applies to float/int text input) (#701)
  - input text: hover tooltip could show unclamped text
  - input text: support for INSERT key to toggle overwrite mode. currently disabled because stb_textedit behavior is unsatisfactory on multi-line. (#2863)
  - input text: option to Tab after an Enter validation.
  - input text: add ImGuiInputTextFlags_EnterToApply? (off #218)
  - input text: easier ways to update buffer (from source char*) while owned. preserve some sort of cursor position for multi-line text.
  - input text: add discard flag (e.g. ImGuiInputTextFlags_DiscardActiveBuffer) or make it easier to clear active focus for text replacement during edition (#725)
+ - input text: display bug when clicking a drag/slider after an input text in a different window has all-selected text (order dependent). actually a very old bug but no one appears to have noticed it.
  - input text: allow centering/positioning text so that ctrl+clicking Drag or Slider keeps the textual value at the same pixel position.
  - input text: decorrelate display layout from inputs with custom template - e.g. what's the easiest way to implement a nice IP/Mac address input editor?
- - input text: callback system (global) so user can plug in an expression evaluator easily. (#1691)
+ - input text: global callback system so user can plug in an expression evaluator easily. (#1691)
  - input text: force scroll to end or scroll to a given line/contents (so user can implement a log or a search feature)
  - input text: a way to preview completion (e.g. disabled text completing from the cursor)
  - input text: a side bar that could e.g. preview where errors are. probably left to the user to draw but we'd need to give them the info there.
  - input text: a way for the user to provide syntax coloring.
  - input text: Shift+TAB with ImGuiInputTextFlags_AllowTabInput could eat preceding blanks, up to tab_count.
+ - input text multi-line: don't directly call AddText() which does an unnecessary vertex reserve for character count prior to clipping. and/or more line-based clipping to AddText(). and/or reorganize TextUnformatted/RenderText for more efficiency for large text (e.g TextUnformatted could clip and log separately, etc).
  - input text multi-line: support for copy/cut without selection (copy/cut current line?)
  - input text multi-line: line numbers? status bar? (follow up on #200)
  - input text multi-line: behave better when user changes input buffer while editing is active (even though it is illegal behavior). namely, the change of buffer can create a scrollbar glitch (#725)
  - input text multi-line: better horizontal scrolling support (#383, #1224)
+ - input text multi-line: single call to AddText() should be coarse clipped on InputTextEx() end.
  - input number: optional range min/max for Input*() functions
  - input number: holding [-]/[+] buttons could increase the step speed non-linearly (or user-controlled)
  - input number: use mouse wheel to step up/down
@@ -107,7 +115,11 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
 !- color: the color conversion helpers/types are a mess and needs sorting out.
  - color: (api breaking) ImGui::ColorConvertXXX functions should be loose ImColorConvertXX to match imgui_internals.h
 
+ - plot: full featured plot/graph api w/ scrolling, zooming etc. --> promote using ImPlot
+ - (plot: deleted all other todo lines on 2023-06-28)
+
  - clipper: ability to disable the clipping through a simple flag/bool.
+ - clipper: ability to run without knowing full count in advance.
  - clipper: horizontal clipping support. (#2580)
 
  - separator: expose flags (#759)
@@ -115,7 +127,35 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - separator: width, thickness, centering (#1643, #2657)
  - splitter: formalize the splitter idiom into an official api (we want to handle n-way split) (#319)
 
- - docking: merge docking branch (#2109)
+ - docking: B: ordering currently held in tab bar should be implicitly held by windows themselves (also see #2304)
+ - docking: B- tab bar: the order/focus restoring code could be part of TabBar and not DockNode? (#8)
+ - docking: B~ rework code to be able to lazily create tab bar instance in a single place. The _Unsorted tab flag could be replacing a trailing-counter in DockNode?
+ - docking: B~ fully track windows/settings reference in dock nodes. perhaps find a representation that allows facilitate use of dock builder functions.
+ - docking: B~ Unreal style document system (requires low-level controls of dockspace serialization fork/copy/delete). this is mostly working but the DockBuilderXXX api are not exposed/finished.
+ - docking: B: when docking outer, perform size locking on neighbors nodes the same way we do it with splitters, so other nodes are not resized.
+ - docking: B~ central node resizing behavior incorrect.
+ - docking: B: changing title font/style per-window is not supported as dock nodes are created in NewFrame.
+ - docking: B- dock node inside its own viewports creates 1 temporary viewport per window on startup before ditching them (doesn't affect the user nor request platform windows to be created, but unnecessary)
+ - docking: B- resize sibling locking behavior may be less desirable if we merged same-axis sibling in a same node level?
+ - docking: B- single visible node part of a hidden split hierarchy (OnlyNodeWithWindows != NULL) should show a normal title bar (not a tab bar)
+ - docking: B~ SetNextWindowDock() calls (with conditional) -> defer everything to DockContextUpdate (repro: Documents->[X]Windows->Dock 1 elsewhere->Click Redock All
+ - docking: B~ tidy up tab list popup buttons features (available with manual tab-bar, see ImGuiTabBarFlags_NoTabListPopupButton code, not used by docking nodes)
+ - docking: B- SetNextWindowDockId(0) with a second Begin() in the frame will asserts
+ - docking: B: resize grip drawn in host window typically appears under scrollbar.
+ - docking: B: resize grip auto-resize on multiple node hierarchy doesn't make much sense or should be improved?
+ - docking: B- SetNextWindowFocus() doesn't seem to apply if the window is hidden this frame, need repro (#4)
+ - docking: B- resizing a dock tree small currently has glitches (overlapping collapse and close button, etc.)
+ - docking: B- dpi: look at interaction with the hi-dpi and multi-dpi stuff.
+ - docking: B- tab bar: appearing on first frame with a dumb layout would do less harm that not appearing? (when behind dynamic branch) or store titles + render in EndTabBar()
+ - docking: B- tab bar: make selected tab always shows its full title?
+ - docking: B- hide close button on single tab bar?
+ - docking: B- nav: design interactions so nav controls can dock/undock
+ - docking: B- dockspace: flag to lock the dock tree and/or sizes (ImGuiDockNodeFlags_Locked?)
+ - docking: B- reintroduce collapsing a floating dock node. also collapsing a docked dock node!
+ - docking: B- allow dragging a non-floating dock node by clicking on the title-bar-looking section (not just the collapse/menu button)
+ - docking: B- option to remember undocked window size? (instead of keeping their docked size) (relate to #2104)
+ - docking: C- nav: CTRL+TAB highlighting tabs shows the mismatch between focus-stack and tab-order (not visible in VS because it doesn't highlight the tabs)
+ - docking: C- after a dock/undock, the Scrollbar Status update in Begin() should use an updated e.g. size_y_for_scrollbars to avoid a 1 frame scrollbar flicker.
 
  - tabs: "there is currently a problem because TabItem() will try to submit their own tooltip after 0.50 second, and this will have the effect of making your tooltip flicker once." -> tooltip priority work (WIP branch)
  - tabs: make EndTabBar fail if users doesn't respect BeginTabBar return value, for consistency/future-proofing.
@@ -125,7 +165,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - image/image button: misalignment on padded/bordered button?
  - image/image button: parameters are confusing, image() has tint_col,border_col whereas imagebutton() has bg_col/tint_col. Even thou they are different parameters ordering could be more consistent. can we fix that?
  - slider: allow using the [-]/[+] buttons used by InputFloat()/InputInt()
- - slider: add dragging-based widgets to edit values with mouse (on 2 axes), saving screen real-estate.
+ - slider: add dragging-based widgets to edit values with mouse (on 2 axises), saving screen real-estate.
  - slider: tint background based on value (e.g. v_min -> v_max, or use 0.0f either side of the sign)
  - slider: relative dragging? + precision dragging
  - slider: step option (#1183)
@@ -133,19 +173,22 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - knob: rotating knob widget (#942)
  - drag float: support for reversed drags (min > max) (removed is_locked, also see fdc526e)
  - drag float: up/down axis
+ - drag float: power != 0.0f with current value being outside the range keeps the value stuck.
  - drag float: added leeway on edge (e.g. a few invisible steps past the clamp limits)
 
  - combo: a way/helper to customize the combo preview (#1658) -> experimental BeginComboPreview()
  - combo/listbox: keyboard control. need InputText-like non-active focus + key handling. considering keyboard for custom listbox (pr #203)
+ - listbox: multiple selection (WIP range-select branch)
  - listbox: unselect option (#1208)
+ - listbox: make it easier/more natural to implement range-select (need some sort of info/ref about the last clicked/focused item that user can translate to an index?) (WIP range-select branch)
  - listbox: user may want to initial scroll to focus on the one selected value?
  - listbox: disable capturing mouse wheel if the listbox has no scrolling. (#1681)
  - listbox: scrolling should track modified selection.
  - listbox: future api should allow to enable horizontal scrolling (#2510)
 
 !- popups/menus: clarify usage of popups id, how MenuItem/Selectable closing parent popups affects the ID, etc. this is quite fishy needs improvement! (#331, #402)
- - modals: make modal title bar blink when trying to click outside the modal.
- - modals: technically speaking, we could make Begin() with ImGuiWindowFlags_Modal work without involving popup. May help untangle a few things, as modals are more like regular windows than popups. (#402)
+ - modals: make modal title bar blink when trying to click outside the modal
+ - modals: technically speaking, we could make Begin() with ImGuiWindowFlags_Modal work without involving popup. May help untangle a few things, as modals are more like regular windows than popups.
  - popups: if the popup functions took explicit ImGuiID it would allow the user to manage the scope of those ID. (#331)
  - popups: clicking outside (to close popup) and holding shouldn't drag window below.
  - popups: add variant using global identifier similar to Begin/End (#402)
@@ -187,7 +230,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - style: FramePadding could be different for up vs down (#584)
  - style: WindowPadding needs to be EVEN as the 0.5 multiplier used on this value probably have a subtle effect on clip rectangle
  - style: have a more global HSV setter (e.g. alter hue on all elements). consider replacing active/hovered by offset in HSV space? (#438, #707, #1223)
- - style: gradients fill (#4722, #1223) ~ 2 bg colors for each fill? tricky with rounded shapes and using textures for corners.
+ - style: gradients fill (#1223) ~ 2 bg colors for each fill? tricky with rounded shapes and using textures for corners.
  - style editor: color child window height expressed in multiple of line height.
 
  - log: improve logging of ArrowButton, ListBox, TabItem
@@ -198,11 +241,12 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - log: let user copy any window content to clipboard easily (CTRL+C on windows? while moving it? context menu?). code is commented because it fails with multiple Begin/End pairs.
  - log: obsolete LogButtons().... (was: LogButtons() options for specifying depth and/or hiding depth slider)
 
- - filters: set a current filter that certain items (e.g. tree node) can automatically query to hide themselves
+ - filters: set a current filter that certains items (e.g. tree node) can automatically query to hide themselves
  - filters: handle wild-cards (with implicit leading/trailing *), reg-exprs
  - filters: fuzzy matches (may use code at blog.forrestthewoods.com/4cffeed33fdb)
 
  - drag and drop: focus drag target window on hold (even without open)
+ - drag and drop: releasing a drop shows the "..." tooltip for one frame - since e13e598 (#1725)
  - drag and drop: drag source on a group object (would need e.g. an invisible button covering group in EndGroup) https://twitter.com/paniq/status/1121446364909535233
  - drag and drop: have some way to know when a drag begin from BeginDragDropSource() pov. (see 2018/01/11 post in #143)
  - drag and drop: allow preview tooltip to be submitted from a different place than the drag source. (#1725)
@@ -228,13 +272,22 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
 
  - font: arbitrary line spacing. (#2945)
  - font: MergeMode: flags to select overwriting or not (this is now very easy with refactored ImFontAtlasBuildWithStbTruetype)
- - font: better CalcTextSizeA() API, at least for simple use cases. current one is horrible (perhaps have simple vs extended versions).
+ - font: free the Alpha buffer if user only requested RGBA.
+!- font: better CalcTextSizeA() API, at least for simple use cases. current one is horrible (perhaps have simple vs extended versions).
  - font: for the purpose of RenderTextEllipsis(), it might be useful that CalcTextSizeA() can ignore the trailing padding?
  - font: a CalcTextHeight() helper could run faster than CalcTextSize().y
  - font: enforce monospace through ImFontConfig (for icons?) + create dual ImFont output from same input, reusing rasterized data but with different glyphs/AdvanceX
+ - font: finish CustomRectRegister() to allow mapping Unicode codepoint to custom texture data
+ - font: remove ID from CustomRect registration, it seems unnecessary!
  - font: make it easier to submit own bitmap font (same texture, another texture?). (#2127, #2575)
+ - font: PushFontSize API (#1018)
  - font: MemoryTTF taking ownership confusing/not obvious, maybe default should be opposite?
  - font: storing MinAdvanceX per font would allow us to skip calculating line width (under a threshold of character count) in loops looking for block width
+ - font/demo: add tools to show glyphs used by a text blob, display U16 value, list missing glyphs.
+ - font/demo: demonstrate use of ImFontGlyphRangesBuilder.
+ - font/atlas: add a missing Glyphs.reserve()
+ - font/atlas: incremental updates
+ - font/atlas: dynamic font atlas to avoid baking huge ranges into bitmap and make scaling easier.
  - font/draw: vertical and/or rotated text renderer (#705) - vertical is easier clipping wise
  - font/draw: need to be able to specify wrap start position.
  - font/draw: better reserve policy for large horizontal block of text (shouldn't reserve for all clipped lines). also see #3349.
@@ -243,6 +296,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - font: optimization: for monospace font (like the default one) we can trim IndexXAdvance as long as trailing value is == FallbackXAdvance (need to make sure TAB is still correct), would save on cache line.
  - font: add support for kerning, probably optional. A) perhaps default to (32..128)^2 matrix ~ 9K entries = 36KB, then hash for non-ascii?. B) or sparse lookup into per-char list?
  - font: add a simpler CalcTextSizeA() api? current one ok but not welcome if user needs to call it directly (without going through ImGui::CalcTextSize)
+ - font: fix AddRemapChar() to work before atlas  has been built.
  - font: (api breaking) remove "TTF" from symbol names. also because it now supports OTF.
  - font/opt: Considering storing standalone AdvanceX table as 16-bit fixed point integer?
  - font/opt: Glyph currently 40 bytes (2+9*4). Consider storing UV as 16-bits integer? (->32 bytes). X0/Y0/X1/Y1 as 16 fixed-point integers? Or X0/Y0 as float and X1/Y1 as fixed8_8?
@@ -253,18 +307,19 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - nav: expose wrap around flags/logic to allow e.g. grid based layout (pressing NavRight on the right-most element would go to the next row, etc.). see internal's NavMoveRequestTryWrapping().
  - nav: patterns to make it possible for arrows key to update selection (see JustMovedTo in range_select branch)
  - nav: restore/find nearest NavId when current one disappear (e.g. pressed a button that disappear, or perhaps auto restoring when current button change name)
- - nav: SetItemDefaultFocus() level of priority, so widgets like Selectable when inside a popup could claim a low-priority default focus on the first selected item
+ - nav: SetItemDefaultFocus() level of priority, so widget like Selectable when inside a popup could claim a low-priority default focus on the first selected iem
  - nav: holding space to repeat a button doesn't show button activated during hold.
  - nav: NavFlattened: init requests don't work properly on flattened siblings.
  - nav: NavFlattened: pageup/pagedown/home/end don't work properly on flattened siblings.
  - nav: NavFlattened: ESC on a flattened child should select something.
  - nav: NavFlattened: broken: in typical usage scenario, the items of a fully clipped child are currently not considered to enter into a NavFlattened child.
  - nav: NavFlattened: cannot access menu-bar of a flattened child window with Alt/menu key (not a very common use case..).
+ - nav: simulate right-click or context activation? (SHIFT+F10, keyboard Menu key?)
  - nav/popup: esc/enter default behavior for popups, e.g. be able to mark an "ok" or "cancel" button that would get triggered by those keys, default validation button, etc.
  - nav/treenode: left within a tree node block as a fallback (ImGuiTreeNodeFlags_NavLeftJumpsBackHere by default?)
  - nav/menus: pressing left-right on a vertically clipped menu bar tends to jump to the collapse/close buttons.
  - nav/menus: allow pressing Menu to leave a sub-menu.
- ! nav/menus: a way to access the main menu bar with Alt? (currently needs CTRL+TAB) or last focused window menu bar?
+ - nav/menus: a way to access the main menu bar with Alt? (currently needs CTRL+TAB) or last focused window menu bar?
  - nav/menus: when using the main menu bar, even though we restore focus after, the underlying window loses its title bar highlight during menu manipulation. could we prevent it?
  - nav/menus: main menu bar currently cannot restore a nullptr focus. Could save NavWindow at the time of being focused, similarly to what popup do?
  - nav/menus: Alt,Up could open the first menu (e.g. "File") currently it tends to nav into the window/collapse menu. Do do that we would need custom transition?
@@ -272,6 +327,20 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - nav/windowing: Resizing window will currently fail with certain types of resizing constraints/callback applied
  - focus: preserve ActiveId/focus stack state, e.g. when opening a menu and close it, previously selected InputText() focus gets restored (#622)
 
+ - viewport: make it possible to have no main/hosting viewport
+ - viewport: We set ImGuiViewportFlags_NoFocusOnAppearing in a way that is required for GLFW/SDL binding, but could be handled better without
+   on a custom e.g. Win32 bindings. It prevents newly dragged-out viewports from taking the focus, which makes ALT+F4 more ambiguous.
+ - viewport: not focusing newly undocked viewport means clicking back on previous one doesn't bring OS window to front.
+ - viewport: with platform decoration enabled, platform may force constraint (e.g. minimum size)
+ - viewport: use getfocus/setfocus api to synchronize imgui<>platform focus better (e.g imgui-side ctrl-tab can focus os window, OS initial setup and alt-tab can focus imgui window etc.)
+ - viewport: store per-viewport/monitor DPI in .ini file so an application reload or main window changing DPI on reload can be properly patched for.
+ - viewport: implicit/fallback Debug window can hog a zombie viewport (harmless, noisy?) > could at least clear out the reference on a per session basis?
+ - viewport: need to clarify how to use GetMousePos() from a user point of view.
+ - platform: glfw: no support for ImGuiBackendFlags_HasMouseHoveredViewport.
+ - platform: sdl: no support for ImGuiBackendFlags_HasMouseHoveredViewport. maybe we could use SDL_GetMouseFocus() / SDL_WINDOW_MOUSE_FOCUS if imgui could fallback on its heuristic when NoInputs is set
+ - platform: sdl: no refresh of monitor/display (SDL doesn't seem to have an event for it).
+ - platform: sdl: multi-viewport + minimized window seems to break mouse wheel events (at least under Win32).
+
  - inputs: support track pad style scrolling & slider edit.
  - inputs/io: backspace and arrows in the context of a text input could use system repeat rate.
  - inputs/io: clarify/standardize/expose repeat rate and repeat delays (#1808)
@@ -283,6 +352,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - misc: no way to run a root-most GetID() with ImGui:: api since there's always a Debug window in the stack. (mentioned in #2960)
  - misc: make the ImGuiCond values linear (non-power-of-two). internal storage for ImGuiWindow can use integers to combine into flags (Why?)
  - misc: PushItemFlag(): add a flag to disable keyboard capture when used with mouse? (#1682)
+ - misc: use more size_t in public api?
  - misc: support for string view/range instead of char* would e.g. facilitate usage with Rust (#683, #3038, WIP string_view branch)
 
  - demo: demonstrate using PushStyleVar() in more details.
@@ -293,14 +363,15 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
 
  - examples: window minimize, maximize (#583)
  - examples: provide a zero frame-rate/idle example.
- - examples: dx11/dx12: try to use new swapchain blit models (#2970, #9031)
+ - examples: dx11/dx12: try to use new swapchain blit models (#2970)
  - backends: report it better when not able to create texture?
  - backends: glfw: could go idle when minimized? if (glfwGetWindowAttrib(window, GLFW_ICONIFIED)) { glfwWaitEvents(); continue; } // issue: DeltaTime will be super high on resume, perhaps provide a way to let impl know (#440)
  - backends: opengl: rename imgui_impl_opengl2 to impl_opengl_legacy and imgui_impl_opengl3 to imgui_impl_opengl? (#1900)
  - backends: opengl: could use a single vertex buffer and glBufferSubData for uploads?
  - backends: opengl: explicitly disable GL_STENCIL_TEST in bindings.
  - backends: vulkan: viewport: support for synchronized swapping of multiple swap chains.
- - backends: emscripten: dedicated backend? (#8178, #9120, eg. https://github.com/floooh/sokol-samples/blob/master/html5/imgui-emsc.cc#L42)
+ - backends: bgfx: https://gist.github.com/RichardGale/6e2b74bc42b3005e08397236e4be0fd0
+ - backends: emscriptem: with refactored examples, we could provide a direct imgui_impl_emscripten platform layer (see eg. https://github.com/floooh/sokol-samples/blob/master/html5/imgui-emsc.cc#L42)
 
  - bindings: ways to use clang ast dump to generate bindings or helpers for bindings? (e.g. clang++ -Xclang -ast-dump=json imgui.h) (--> use https://github.com/dearimgui/dear_bindings)
 

examples/README.txt

@@ -1,12 +1,9 @@
-New to Dear ImGui?
-- Check out the Getting Started guide: https://github.com/ocornut/imgui/wiki/Getting-Started
-- About Backends: docs/BACKENDS.md file, or on the web: https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md
-- About Examples: docs/EXAMPLES.md file, or on the web: https://github.com/ocornut/imgui/blob/master/docs/EXAMPLES.md
+See BACKENDS and EXAMPLES files in the docs/ folder, or on the web at: https://github.com/ocornut/imgui/tree/master/docs
 
 Backends = Helper code to facilitate integration with platforms/graphics api (used by Examples + should be used by your app).
 Examples = Standalone applications showcasing integration with platforms/graphics api.
 
-A few Examples have extra README files in their respective directory, please check them too!
+Some Examples have extra README files in their respective directory, please check them too!
 
 Once Dear ImGui is running (in either examples or your own application/game/engine),
 run and refer to ImGui::ShowDemoWindow() in imgui_demo.cpp for the end-user API.

examples/example_allegro5/README.md

@@ -24,9 +24,9 @@ You may install Allegro using vcpkg:
 git clone https://github.com/Microsoft/vcpkg
 cd vcpkg
 bootstrap-vcpkg.bat
-vcpkg install allegro5 --triplet=x86-windows    ; for win32
-vcpkg install allegro5 --triplet=x64-windows    ; for win64
-vcpkg integrate install                         ; register include / libs in Visual Studio
+vcpkg install allegro5 --triplet=x86-windows	; for win32
+vcpkg install allegro5 --triplet=x64-windows	; for win64
+vcpkg integrate install						    ; register include / libs in Visual Studio
 ```
 
 Build:

examples/example_allegro5/example_allegro5.vcxproj

@@ -28,27 +28,27 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">

examples/example_allegro5/main.cpp

@@ -28,7 +28,7 @@ int main(int, char**)
     al_install_mouse();
     al_init_primitives_addon();
     al_set_new_display_flags(ALLEGRO_RESIZABLE);
-    ALLEGRO_DISPLAY* display = al_create_display(1280, 800);
+    ALLEGRO_DISPLAY* display = al_create_display(1280, 720);
     al_set_window_title(display, "Dear ImGui Allegro 5 example");
     ALLEGRO_EVENT_QUEUE* queue = al_create_event_queue();
     al_register_event_source(queue, al_get_display_event_source(display));
@@ -40,6 +40,7 @@ int main(int, char**)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;      // Enable Docking
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
@@ -49,21 +50,19 @@ int main(int, char**)
     ImGui_ImplAllegro5_Init(display);
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 
     bool show_demo_window = true;

examples/example_android_opengl3/android/.gitignore

@@ -1,14 +1,12 @@
+.cxx
+.externalNativeBuild
 build/
 *.iml
-.gradle
+
 .idea
-.DS_Store
-/captures
-.externalNativeBuild
-.cxx
+.gradle
 local.properties
 
 # Android Studio puts a Gradle wrapper here, that we don't want:
 gradle/
-!gradle/libs.versions.toml
 gradlew*

examples/example_android_opengl3/android/app/build.gradle

@@ -1,16 +1,16 @@
-plugins {
-    alias(libs.plugins.android.application)
-    alias(libs.plugins.kotlin.android)
-}
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
 
 android {
-    namespace 'imgui.example.android'
-    compileSdk 36
+    compileSdkVersion 33
+    buildToolsVersion "33.0.2"
+    ndkVersion "25.2.9519653"
 
     defaultConfig {
         applicationId "imgui.example.android"
-        minSdk 24
-        targetSdk 36
+        namespace "imgui.example.android"
+        minSdkVersion 24
+        targetSdkVersion 33
         versionCode 1
         versionName "1.0"
     }
@@ -21,17 +21,26 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt')
         }
     }
+
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_11
         targetCompatibility JavaVersion.VERSION_11
     }
+
     kotlinOptions {
-        jvmTarget = '11'
+        jvmTarget="11"
     }
+
     externalNativeBuild {
         cmake {
-            path file('../../CMakeLists.txt')
+            path "../../CMakeLists.txt"
             version '3.22.1'
         }
     }
 }
+repositories {
+    mavenCentral()
+}
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}

examples/example_android_opengl3/android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <application
         android:label="ImGuiExample"

examples/example_android_opengl3/android/build.gradle

@@ -1,5 +1,24 @@
-// Top-level build file where you can add configuration options common to all sub-projects/modules.
-plugins {
-    alias(libs.plugins.android.application) apply false
-    alias(libs.plugins.kotlin.android) apply false
+buildscript {
+    ext.kotlin_version = '1.8.0'
+    repositories {
+        google()
+        mavenCentral()
+
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.4.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
 }

examples/example_android_opengl3/android/gradle/libs.versions.toml

@@ -1,8 +0,0 @@
-[versions]
-agp = "8.12.0"
-kotlin = "2.0.21"
-
-[plugins]
-android-application = { id = "com.android.application", version.ref = "agp" }
-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
-

examples/example_android_opengl3/android/settings.gradle

@@ -1,22 +1 @@
-pluginManagement {
-    repositories {
-        google {
-            content {
-                includeGroupByRegex("com\\.android.*")
-                includeGroupByRegex("com\\.google.*")
-                includeGroupByRegex("androidx.*")
-            }
-        }
-        mavenCentral()
-        gradlePluginPortal()
-    }
-}
-dependencyResolutionManagement {
-    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
-    repositories {
-        google()
-        mavenCentral()
-    }
-}
-
 include ':app'

examples/example_android_opengl3/main.cpp

@@ -151,45 +151,43 @@ void Init(struct android_app* app)
     ImGui_ImplAndroid_Init(g_App->window);
     ImGui_ImplOpenGL3_Init("#version 300 es");
 
-    // Setup scaling
-    float main_scale = 2.0f;
-    ImGuiStyle& style = ImGui::GetStyle();
-    style.ScaleAllSizes(main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
-    style.FontScaleDpi = main_scale;        // Set initial font scale.
-
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
     // - Android: The TTF files have to be placed into the assets/ directory (android/app/src/main/assets), we use our GetAssetData() helper to retrieve them.
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
 
+    // We load the default font with increased size to improve readability on many devices with "high" DPI.
+    // FIXME: Put some effort into DPI awareness.
     // Important: when calling AddFontFromMemoryTTF(), ownership of font_data is transferred by Dear ImGui by default (deleted is handled by Dear ImGui), unless we set FontDataOwnedByAtlas=false in ImFontConfig
-    //void*   font_data;
-    //int     font_data_size;
+    ImFontConfig font_cfg;
+    font_cfg.SizePixels = 22.0f;
+    io.Fonts->AddFontDefault(&font_cfg);
+    //void* font_data;
+    //int font_data_size;
     //ImFont* font;
     //font_data_size = GetAssetData("segoeui.ttf", &font_data);
-    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size);
+    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 16.0f);
     //IM_ASSERT(font != nullptr);
     //font_data_size = GetAssetData("DroidSans.ttf", &font_data);
-    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size);
+    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 16.0f);
     //IM_ASSERT(font != nullptr);
     //font_data_size = GetAssetData("Roboto-Medium.ttf", &font_data);
-    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size);
+    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 16.0f);
     //IM_ASSERT(font != nullptr);
     //font_data_size = GetAssetData("Cousine-Regular.ttf", &font_data);
-    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size);
+    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 15.0f);
     //IM_ASSERT(font != nullptr);
     //font_data_size = GetAssetData("ArialUni.ttf", &font_data);
-    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size);
+    //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 
+    // Arbitrary scale-up
+    // FIXME: Put some effort into DPI awareness
+    ImGui::GetStyle().ScaleAllSizes(3.0f);
+
     g_Initialized = true;
 }
 

examples/example_apple_metal/Makefile

@@ -1,21 +0,0 @@
-# Makefile for example_apple_metal, for macOS only (**not iOS**)
-CXX = clang++
-EXE = example_apple_metal
-IMGUI_DIR = ../../
-SOURCES = main.mm
-SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
-SOURCES += $(IMGUI_DIR)/backends/imgui_impl_osx.mm $(IMGUI_DIR)/backends/imgui_impl_metal.mm
-
-CXXFLAGS = -std=c++11 -ObjC++ -fobjc-arc -Wall -Wextra -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
-FRAMEWORKS = -framework AppKit -framework Metal -framework MetalKit -framework QuartzCore -framework GameController
-
-all: $(EXE)
-
-$(EXE): $(SOURCES)
-	$(CXX) $(CXXFLAGS) $^ $(FRAMEWORKS) -o $@
-
-run: all
-	./$(EXE)
-
-clean:
-	rm -f $(EXE) *.o

examples/example_apple_metal/example_apple_metal.xcodeproj/project.pbxproj

@@ -3,11 +3,14 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 54;
+	objectVersion = 48;
 	objects = {
 
 /* Begin PBXBuildFile section */
+		050450AB2768052600AB6805 /* imgui_tables.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 5079822D257677DB0038A28D /* imgui_tables.cpp */; };
+		050450AD276863B000AB6805 /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 050450AC276863B000AB6805 /* QuartzCore.framework */; };
 		05318E0F274C397200A8DE2E /* GameController.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 05318E0E274C397200A8DE2E /* GameController.framework */; };
+		05A275442773BEA20084EF39 /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 05A275432773BEA20084EF39 /* QuartzCore.framework */; };
 		07A82ED82139413D0078D120 /* imgui_widgets.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 07A82ED72139413C0078D120 /* imgui_widgets.cpp */; };
 		07A82ED92139418F0078D120 /* imgui_widgets.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 07A82ED72139413C0078D120 /* imgui_widgets.cpp */; };
 		5079822E257677DB0038A28D /* imgui_tables.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 5079822D257677DB0038A28D /* imgui_tables.cpp */; };
@@ -33,7 +36,11 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
+		050450AC276863B000AB6805 /* QuartzCore.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = QuartzCore.framework; path = System/Library/Frameworks/QuartzCore.framework; sourceTree = SDKROOT; };
 		05318E0E274C397200A8DE2E /* GameController.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = GameController.framework; path = System/Library/Frameworks/GameController.framework; sourceTree = SDKROOT; };
+		05A2754027728F5B0084EF39 /* imgui_impl_metal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = imgui_impl_metal.h; path = ../../backends/imgui_impl_metal.h; sourceTree = "<group>"; };
+		05A2754127728F5B0084EF39 /* imgui_impl_osx.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = imgui_impl_osx.h; path = ../../backends/imgui_impl_osx.h; sourceTree = "<group>"; };
+		05A275432773BEA20084EF39 /* QuartzCore.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = QuartzCore.framework; path = Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS15.2.sdk/System/Library/Frameworks/QuartzCore.framework; sourceTree = DEVELOPER_DIR; };
 		07A82ED62139413C0078D120 /* imgui_internal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = imgui_internal.h; path = ../../imgui_internal.h; sourceTree = "<group>"; };
 		07A82ED72139413C0078D120 /* imgui_widgets.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = imgui_widgets.cpp; path = ../../imgui_widgets.cpp; sourceTree = "<group>"; };
 		5079822D257677DB0038A28D /* imgui_tables.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = imgui_tables.cpp; path = ../../imgui_tables.cpp; sourceTree = "<group>"; };
@@ -66,6 +73,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				05A275442773BEA20084EF39 /* QuartzCore.framework in Frameworks */,
 				8309BD8F253CCAAA0045E2A1 /* UIKit.framework in Frameworks */,
 				83BBE9E720EB46BD00295997 /* MetalKit.framework in Frameworks */,
 				83BBE9E520EB46B900295997 /* Metal.framework in Frameworks */,
@@ -76,6 +84,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				050450AD276863B000AB6805 /* QuartzCore.framework in Frameworks */,
 				8309BDC6253CCCFE0045E2A1 /* AppKit.framework in Frameworks */,
 				83BBE9EC20EB471700295997 /* MetalKit.framework in Frameworks */,
 				05318E0F274C397200A8DE2E /* GameController.framework in Frameworks */,
@@ -136,6 +145,8 @@
 		83BBE9E320EB46B800295997 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				050450AC276863B000AB6805 /* QuartzCore.framework */,
+				05A275432773BEA20084EF39 /* QuartzCore.framework */,
 				05318E0E274C397200A8DE2E /* GameController.framework */,
 				8309BDC5253CCCFE0045E2A1 /* AppKit.framework */,
 				8309BD8E253CCAAA0045E2A1 /* UIKit.framework */,
@@ -153,7 +164,9 @@
 			isa = PBXGroup;
 			children = (
 				5079822D257677DB0038A28D /* imgui_tables.cpp */,
+				05A2754027728F5B0084EF39 /* imgui_impl_metal.h */,
 				8309BDB5253CCC9D0045E2A1 /* imgui_impl_metal.mm */,
+				05A2754127728F5B0084EF39 /* imgui_impl_osx.h */,
 				8309BDB6253CCC9D0045E2A1 /* imgui_impl_osx.mm */,
 				83BBEA0420EB54E700295997 /* imconfig.h */,
 				83BBEA0320EB54E700295997 /* imgui.cpp */,
@@ -209,8 +222,7 @@
 		8307E7B620E9F9C700473790 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				BuildIndependentTargetsInParallel = YES;
-				LastUpgradeCheck = 1530;
+				LastUpgradeCheck = 1200;
 				ORGANIZATIONNAME = "Warren Moore";
 				TargetAttributes = {
 					8307E7C320E9F9C900473790 = {
@@ -285,7 +297,7 @@
 				83BBEA0A20EB54E700295997 /* imgui.cpp in Sources */,
 				83BBEA0820EB54E700295997 /* imgui_demo.cpp in Sources */,
 				83BBEA0620EB54E700295997 /* imgui_draw.cpp in Sources */,
-				5079822E257677DB0038A28D /* imgui_tables.cpp in Sources */,
+				050450AB2768052600AB6805 /* imgui_tables.cpp in Sources */,
 				07A82ED92139418F0078D120 /* imgui_widgets.cpp in Sources */,
 				8309BDA8253CCC080045E2A1 /* main.mm in Sources */,
 			);
@@ -328,11 +340,9 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
-				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
-				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -386,11 +396,9 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
-				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
-				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -410,11 +418,8 @@
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = "$(SRCROOT)/iOS/Info-iOS.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = (
-					"$(inherited)",
-					"@executable_path/Frameworks",
-				);
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "org.imgui.example.apple-metal-ios";
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = iphoneos;
@@ -430,11 +435,8 @@
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = "$(SRCROOT)/iOS/Info-iOS.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = (
-					"$(inherited)",
-					"@executable_path/Frameworks",
-				);
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "org.imgui.example.apple-metal-ios";
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = iphoneos;
@@ -450,14 +452,10 @@
 				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = "$(SRCROOT)/macOS/Info-macOS.plist";
-				LD_RUNPATH_SEARCH_PATHS = (
-					"$(inherited)",
-					"@executable_path/../Frameworks",
-				);
-				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks";
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.imgui.example.apple-metal-macos";
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = macosx;
@@ -471,14 +469,10 @@
 				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = "$(SRCROOT)/macOS/Info-macOS.plist";
-				LD_RUNPATH_SEARCH_PATHS = (
-					"$(inherited)",
-					"@executable_path/../Frameworks",
-				);
-				MACOSX_DEPLOYMENT_TARGET = "$(RECOMMENDED_MACOSX_DEPLOYMENT_TARGET)";
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks";
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.imgui.example.apple-metal-macos";
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = macosx;

examples/example_apple_metal/main.mm

@@ -60,30 +60,38 @@
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
+    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsLight();
 
+    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
+    ImGuiStyle& style = ImGui::GetStyle();
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
+
     // Setup Renderer backend
     ImGui_ImplMetal_Init(_device);
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 
     return self;
@@ -96,7 +104,7 @@
 
 -(void)loadView
 {
-    self.view = [[MTKView alloc] initWithFrame:CGRectMake(0, 0, 1200, 800)];
+    self.view = [[MTKView alloc] initWithFrame:CGRectMake(0, 0, 1200, 720)];
 }
 
 -(void)viewDidLoad
@@ -131,7 +139,7 @@
     if (renderPassDescriptor == nil)
     {
         [commandBuffer commit];
-        return;
+		return;
     }
 
     // Start the Dear ImGui frame
@@ -194,9 +202,16 @@
     [renderEncoder popDebugGroup];
     [renderEncoder endEncoding];
 
-    // Present
+	// Present
     [commandBuffer presentDrawable:view.currentDrawable];
     [commandBuffer commit];
+
+    // Update and Render additional Platform Windows
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        ImGui::UpdatePlatformWindows();
+        ImGui::RenderPlatformWindowsDefault();
+    }
 }
 
 -(void)mtkView:(MTKView*)view drawableSizeWillChange:(CGSize)size
@@ -321,20 +336,9 @@
 
 #if TARGET_OS_OSX
 
-int main(int, const char**)
+int main(int argc, const char * argv[])
 {
-    @autoreleasepool
-    {
-        [NSApplication sharedApplication];
-        [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
-
-        AppDelegate *appDelegate = [[AppDelegate alloc] init];   // creates window
-        [NSApp setDelegate:appDelegate];
-
-        [NSApp activateIgnoringOtherApps:YES];
-        [NSApp run];
-    }
-    return 0;
+    return NSApplicationMain(argc, argv);
 }
 
 #else

examples/example_apple_opengl2/Makefile

@@ -1,21 +0,0 @@
-# Makefile for example_apple_metal, for macOS only (**not iOS**)
-CXX = clang++
-EXE = example_apple_opengl2
-IMGUI_DIR = ../../
-SOURCES = main.mm
-SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
-SOURCES += $(IMGUI_DIR)/backends/imgui_impl_osx.mm $(IMGUI_DIR)/backends/imgui_impl_opengl2.cpp
-
-CXXFLAGS = -std=c++11 -ObjC++ -fobjc-arc -Wall -Wextra -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
-FRAMEWORKS = -framework Cocoa -framework OpenGL -framework GameController
-
-all: $(EXE)
-
-$(EXE): $(SOURCES)
-	$(CXX) $(CXXFLAGS) $(SOURCES) -o $(EXE) $(FRAMEWORKS)
-
-run: all
-	./$(EXE)
-
-clean:
-	rm -f $(EXE) *.o

examples/example_apple_opengl2/example_apple_opengl2.xcodeproj/project.pbxproj

@@ -289,7 +289,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CODE_SIGN_STYLE = Automatic;
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				USER_HEADER_SEARCH_PATHS = ../..;
 			};
@@ -299,7 +299,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CODE_SIGN_STYLE = Automatic;
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				USER_HEADER_SEARCH_PATHS = ../..;
 			};

examples/example_apple_opengl2/main.mm

@@ -47,31 +47,39 @@
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
+    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsLight();
 
+    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
+    ImGuiStyle& style = ImGui::GetStyle();
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
+
     // Setup Platform/Renderer backends
     ImGui_ImplOSX_Init(self);
     ImGui_ImplOpenGL2_Init();
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 }
 
@@ -138,6 +146,13 @@
 
     ImGui_ImplOpenGL2_RenderDrawData(draw_data);
 
+    // Update and Render additional Platform Windows
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        ImGui::UpdatePlatformWindows();
+        ImGui::RenderPlatformWindowsDefault();
+    }
+
     // Present
     [[self openGLContext] flushBuffer];
 
@@ -171,9 +186,9 @@
 -(NSWindow*)window
 {
     if (_window != nil)
-        return _window;
+        return (_window);
 
-    NSRect viewRect = NSMakeRect(100.0, 100.0, 100.0 + 1280.0, 100 + 800.0);
+    NSRect viewRect = NSMakeRect(100.0, 100.0, 100.0 + 1280.0, 100 + 720.0);
 
     _window = [[NSWindow alloc] initWithContentRect:viewRect styleMask:NSWindowStyleMaskTitled|NSWindowStyleMaskMiniaturizable|NSWindowStyleMaskResizable|NSWindowStyleMaskClosable backing:NSBackingStoreBuffered defer:YES];
     [_window setTitle:@"Dear ImGui OSX+OpenGL2 Example"];
@@ -181,7 +196,7 @@
     [_window setOpaque:YES];
     [_window makeKeyAndOrderFront:NSApp];
 
-    return _window;
+    return (_window);
 }
 
 -(void)setupMenu

examples/example_glfw_metal/main.mm

@@ -27,58 +27,61 @@ static void glfw_error_callback(int error, const char* description)
 
 int main(int, char**)
 {
+    // Setup Dear ImGui context
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO(); (void)io;
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;   // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;      // Enable Docking
+    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;    // Enable Multi-Viewport / Platform Windows
+
+    // Setup style
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsLight();
+
+    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
+    ImGuiStyle& style = ImGui::GetStyle();
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
+
+    // Load Fonts
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
+    // - Read 'docs/FONTS.md' for more instructions and details.
+    // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
+    //IM_ASSERT(font != nullptr);
+
+    // Setup window
     glfwSetErrorCallback(glfw_error_callback);
     if (!glfwInit())
         return 1;
 
     // Create window with graphics context
-    float main_scale = ImGui_ImplGlfw_GetContentScaleForMonitor(glfwGetPrimaryMonitor()); // Valid on GLFW 3.3+ only
     glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
-    GLFWwindow* window = glfwCreateWindow((int)(1280 * main_scale), (int)(800 * main_scale), "Dear ImGui GLFW+Metal example", nullptr, nullptr);
+    GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+Metal example", nullptr, nullptr);
     if (window == nullptr)
         return 1;
 
-    // Setup Dear ImGui context
-    IMGUI_CHECKVERSION();
-    ImGui::CreateContext();
-    ImGuiIO& io = ImGui::GetIO(); (void)io;
-    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
-    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
-
-    // Setup Dear ImGui style
-    ImGui::StyleColorsDark();
-    //ImGui::StyleColorsLight();
-
-    // Setup scaling
-    ImGuiStyle& style = ImGui::GetStyle();
-    style.ScaleAllSizes(main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
-    style.FontScaleDpi = main_scale;        // Set initial font scale. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
-
     id <MTLDevice> device = MTLCreateSystemDefaultDevice();
     id <MTLCommandQueue> commandQueue = [device newCommandQueue];
 
     // Setup Platform/Renderer backends
-    ImGui_ImplGlfw_InitForOpenGL(window, true);
+    ImGui_ImplGlfw_InitForOther(window, true);
     ImGui_ImplMetal_Init(device);
 
-    // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
-    // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
-    // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
-    //IM_ASSERT(font != nullptr);
-
     NSWindow *nswin = glfwGetCocoaWindow(window);
     CAMetalLayer *layer = [CAMetalLayer layer];
     layer.device = device;
@@ -164,6 +167,13 @@ int main(int, char**)
             ImGui::Render();
             ImGui_ImplMetal_RenderDrawData(ImGui::GetDrawData(), commandBuffer, renderEncoder);
 
+            // Update and Render additional Platform Windows
+            if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+            {
+                ImGui::UpdatePlatformWindows();
+                ImGui::RenderPlatformWindowsDefault();
+            }
+
             [renderEncoder popDebugGroup];
             [renderEncoder endEncoding];
 

examples/example_glfw_opengl2/Makefile

@@ -21,7 +21,6 @@ SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui
 SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glfw.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl2.cpp
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
-LINUX_GL_LIBS = -lGL
 
 CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 CXXFLAGS += -g -Wall -Wformat
@@ -33,7 +32,7 @@ LIBS =
 
 ifeq ($(UNAME_S), Linux) #LINUX
 	ECHO_MESSAGE = "Linux"
-	LIBS += $(LINUX_GL_LIBS) `pkg-config --static --libs glfw3`
+	LIBS += -lGL `pkg-config --static --libs glfw3`
 
 	CXXFLAGS += `pkg-config --cflags glfw3`
 	CFLAGS = $(CXXFLAGS)

examples/example_glfw_opengl2/example_glfw_opengl2.vcxproj

@@ -28,27 +28,27 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">

examples/example_glfw_opengl2/main.cpp

@@ -40,8 +40,7 @@ int main(int, char**)
         return 1;
 
     // Create window with graphics context
-    float main_scale = ImGui_ImplGlfw_GetContentScaleForMonitor(glfwGetPrimaryMonitor()); // Valid on GLFW 3.3+ only
-    GLFWwindow* window = glfwCreateWindow((int)(1280 * main_scale), (int)(800 * main_scale), "Dear ImGui GLFW+OpenGL2 example", nullptr, nullptr);
+    GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+OpenGL2 example", nullptr, nullptr);
     if (window == nullptr)
         return 1;
     glfwMakeContextCurrent(window);
@@ -53,36 +52,41 @@ int main(int, char**)
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
+    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
+    //io.ConfigViewportsNoAutoMerge = true;
+    //io.ConfigViewportsNoTaskBarIcon = true;
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsLight();
 
-    // Setup scaling
+    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
     ImGuiStyle& style = ImGui::GetStyle();
-    style.ScaleAllSizes(main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
-    style.FontScaleDpi = main_scale;        // Set initial font scale. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
 
     // Setup Platform/Renderer backends
     ImGui_ImplGlfw_InitForOpenGL(window, true);
     ImGui_ImplOpenGL2_Init();
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 
     // Our state
@@ -163,6 +167,17 @@ int main(int, char**)
         ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData());
         //glUseProgram(last_program);
 
+        // Update and Render additional Platform Windows
+        // (Platform functions may change the current OpenGL context, so we save/restore it to make it easier to paste this code elsewhere.
+        //  For this specific demo app we could also call glfwMakeContextCurrent(window) directly)
+        if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+        {
+            GLFWwindow* backup_current_context = glfwGetCurrentContext();
+            ImGui::UpdatePlatformWindows();
+            ImGui::RenderPlatformWindowsDefault();
+            glfwMakeContextCurrent(backup_current_context);
+        }
+
         glfwMakeContextCurrent(window);
         glfwSwapBuffers(window);
     }

examples/example_glfw_opengl3/Makefile.emscripten

@@ -32,9 +32,8 @@ EMS =
 ##---------------------------------------------------------------------
 
 # ("EMS" options gets added to both CPPFLAGS and LDFLAGS, whereas some options are for linker only)
-# Note: For glfw, we use emscripten-glfw port (contrib.glfw3) instead of ('-s USE_GLFW=3' in LDFLAGS) to get a better support for High DPI displays.
-EMS += -s DISABLE_EXCEPTION_CATCHING=1 --use-port=contrib.glfw3
-LDFLAGS += -s WASM=1 -s ALLOW_MEMORY_GROWTH=1 -s NO_EXIT_RUNTIME=0 -s ASSERTIONS=1
+EMS += -s DISABLE_EXCEPTION_CATCHING=1
+LDFLAGS += -s USE_GLFW=3 -s WASM=1 -s ALLOW_MEMORY_GROWTH=1 -s NO_EXIT_RUNTIME=0 -s ASSERTIONS=1
 
 # Build as single file (binary text encoded in .html file)
 #LDFLAGS += -sSINGLE_FILE

examples/example_glfw_opengl3/example_glfw_opengl3.vcxproj

@@ -28,27 +28,27 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">

examples/example_glfw_opengl3/main.cpp

@@ -71,8 +71,7 @@ int main(int, char**)
 #endif
 
     // Create window with graphics context
-    float main_scale = ImGui_ImplGlfw_GetContentScaleForMonitor(glfwGetPrimaryMonitor()); // Valid on GLFW 3.3+ only
-    GLFWwindow* window = glfwCreateWindow((int)(1280 * main_scale), (int)(800 * main_scale), "Dear ImGui GLFW+OpenGL3 example", nullptr, nullptr);
+    GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+OpenGL3 example", nullptr, nullptr);
     if (window == nullptr)
         return 1;
     glfwMakeContextCurrent(window);
@@ -84,15 +83,22 @@ int main(int, char**)
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
+    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
+    //io.ConfigViewportsNoAutoMerge = true;
+    //io.ConfigViewportsNoTaskBarIcon = true;
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsLight();
 
-    // Setup scaling
+    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
     ImGuiStyle& style = ImGui::GetStyle();
-    style.ScaleAllSizes(main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
-    style.FontScaleDpi = main_scale;        // Set initial font scale. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
 
     // Setup Platform/Renderer backends
     ImGui_ImplGlfw_InitForOpenGL(window, true);
@@ -102,22 +108,20 @@ int main(int, char**)
     ImGui_ImplOpenGL3_Init(glsl_version);
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
     // - Our Emscripten build process allows embedding fonts to be accessible at runtime from the "fonts/" folder. See Makefile.emscripten for details.
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 
     // Our state
@@ -198,6 +202,17 @@ int main(int, char**)
         glClear(GL_COLOR_BUFFER_BIT);
         ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
 
+        // Update and Render additional Platform Windows
+        // (Platform functions may change the current OpenGL context, so we save/restore it to make it easier to paste this code elsewhere.
+        //  For this specific demo app we could also call glfwMakeContextCurrent(window) directly)
+        if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+        {
+            GLFWwindow* backup_current_context = glfwGetCurrentContext();
+            ImGui::UpdatePlatformWindows();
+            ImGui::RenderPlatformWindowsDefault();
+            glfwMakeContextCurrent(backup_current_context);
+        }
+
         glfwSwapBuffers(window);
     }
 #ifdef __EMSCRIPTEN__

examples/example_glfw_vulkan/CMakeLists.txt

@@ -15,9 +15,7 @@ set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DVK_PROTOTYPES")
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DVK_PROTOTYPES")
 
 # GLFW
-if(NOT GLFW_DIR)
-   set(GLFW_DIR ../../../glfw) # Set this to point to an up-to-date GLFW repo
-endif()
+set(GLFW_DIR ../../../glfw) # Set this to point to an up-to-date GLFW repo
 option(GLFW_BUILD_EXAMPLES "Build the GLFW example programs" OFF)
 option(GLFW_BUILD_TESTS "Build the GLFW test programs" OFF)
 option(GLFW_BUILD_DOCS "Build the GLFW documentation" OFF)

examples/example_glfw_vulkan/Makefile

@@ -1,83 +0,0 @@
-#
-# Cross Platform Makefile
-# Compatible with MSYS2/MINGW, Ubuntu 14.04.1 and Mac OS X
-#
-# You will need GLFW (http://www.glfw.org):
-# Linux:
-#   apt-get install libglfw-dev
-# Mac OS X:
-#   brew install glfw
-# MSYS2:
-#   pacman -S --noconfirm --needed mingw-w64-x86_64-toolchain mingw-w64-x86_64-glfw
-#
-
-#CXX = g++
-#CXX = clang++
-
-EXE = example_glfw_vulkan
-IMGUI_DIR = ../..
-SOURCES = main.cpp
-SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
-SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glfw.cpp $(IMGUI_DIR)/backends/imgui_impl_vulkan.cpp
-OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
-UNAME_S := $(shell uname -s)
-LINUX_GL_LIBS = -lGL
-
-CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
-CXXFLAGS += -g -Wall -Wformat
-LIBS =
-
-##---------------------------------------------------------------------
-## BUILD FLAGS PER PLATFORM
-##---------------------------------------------------------------------
-
-ifeq ($(UNAME_S), Linux) #LINUX
-	ECHO_MESSAGE = "Linux"
-	LIBS += $(LINUX_GL_LIBS) `pkg-config --static --libs glfw3 vulkan`
-
-	CXXFLAGS += `pkg-config --cflags glfw3 vulkan`
-	CFLAGS = $(CXXFLAGS)
-endif
-
-ifeq ($(UNAME_S), Darwin) #APPLE
-	ECHO_MESSAGE = "Mac OS X"
-	LIBS += -framework Cocoa -framework IOKit -framework CoreVideo
-	LIBS += `pkg-config --libs glfw3 vulkan`
-	LIBS += -L/usr/local/lib -L/opt/local/lib -L/opt/homebrew/lib
-	#LIBS += -lglfw3
-
-	LIBS += `pkg-config --cflags glfw3 vulkan`
-	CXXFLAGS += -I/usr/local/include -I/opt/local/include -I/opt/homebrew/include
-	CFLAGS = $(CXXFLAGS)
-endif
-
-ifeq ($(OS), Windows_NT)
-	ECHO_MESSAGE = "MinGW"
-	LIBS += -lgdi32 -limm32
-	LIBS += `pkg-config --libs glfw3 vulkan`
-
-	CXXFLAGS += `pkg-config --cflags glfw3 vulkan`
-	CFLAGS = $(CXXFLAGS)
-endif
-
-##---------------------------------------------------------------------
-## BUILD RULES
-##---------------------------------------------------------------------
-
-%.o:%.cpp
-	$(CXX) $(CXXFLAGS) -c -o $@ $<
-
-%.o:$(IMGUI_DIR)/%.cpp
-	$(CXX) $(CXXFLAGS) -c -o $@ $<
-
-%.o:$(IMGUI_DIR)/backends/%.cpp
-	$(CXX) $(CXXFLAGS) -c -o $@ $<
-
-all: $(EXE)
-	@echo Build complete for $(ECHO_MESSAGE)
-
-$(EXE): $(OBJS)
-	$(CXX) -o $@ $^ $(CXXFLAGS) $(LIBS)
-
-clean:
-	rm -f $(EXE) $(OBJS)

examples/example_glfw_vulkan/example_glfw_vulkan.vcxproj

@@ -28,27 +28,27 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">

examples/example_glfw_vulkan/main.cpp

@@ -38,7 +38,6 @@
 //#define APP_USE_UNLIMITED_FRAME_RATE
 #ifdef _DEBUG
 #define APP_USE_VULKAN_DEBUG_REPORT
-static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
 #endif
 
 // Data
@@ -48,6 +47,7 @@ static VkPhysicalDevice         g_PhysicalDevice = VK_NULL_HANDLE;
 static VkDevice                 g_Device = VK_NULL_HANDLE;
 static uint32_t                 g_QueueFamily = (uint32_t)-1;
 static VkQueue                  g_Queue = VK_NULL_HANDLE;
+static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
 static VkPipelineCache          g_PipelineCache = VK_NULL_HANDLE;
 static VkDescriptorPool         g_DescriptorPool = VK_NULL_HANDLE;
 
@@ -61,7 +61,7 @@ static void glfw_error_callback(int error, const char* description)
 }
 static void check_vk_result(VkResult err)
 {
-    if (err == VK_SUCCESS)
+    if (err == 0)
         return;
     fprintf(stderr, "[vulkan] Error: VkResult = %d\n", err);
     if (err < 0)
@@ -193,8 +193,7 @@ static void SetupVulkan(ImVector<const char*> instance_extensions)
     {
         VkDescriptorPoolSize pool_sizes[] =
         {
-            { VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, IMGUI_IMPL_VULKAN_MINIMUM_SAMPLED_IMAGE_POOL_SIZE },
-            { VK_DESCRIPTOR_TYPE_SAMPLER, IMGUI_IMPL_VULKAN_MINIMUM_SAMPLER_POOL_SIZE },
+            { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, IMGUI_IMPL_VULKAN_MINIMUM_IMAGE_SAMPLER_POOL_SIZE },
         };
         VkDescriptorPoolCreateInfo pool_info = {};
         pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
@@ -202,7 +201,7 @@ static void SetupVulkan(ImVector<const char*> instance_extensions)
         pool_info.maxSets = 0;
         for (VkDescriptorPoolSize& pool_size : pool_sizes)
             pool_info.maxSets += pool_size.descriptorCount;
-        pool_info.poolSizeCount = (uint32_t)IM_COUNTOF(pool_sizes);
+        pool_info.poolSizeCount = (uint32_t)IM_ARRAYSIZE(pool_sizes);
         pool_info.pPoolSizes = pool_sizes;
         err = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool);
         check_vk_result(err);
@@ -213,9 +212,11 @@ static void SetupVulkan(ImVector<const char*> instance_extensions)
 // Your real engine/app may not use them.
 static void SetupVulkanWindow(ImGui_ImplVulkanH_Window* wd, VkSurfaceKHR surface, int width, int height)
 {
+    wd->Surface = surface;
+
     // Check for WSI support
     VkBool32 res;
-    vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, surface, &res);
+    vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, wd->Surface, &res);
     if (res != VK_TRUE)
     {
         fprintf(stderr, "Error no WSI support on physical device 0\n");
@@ -225,8 +226,7 @@ static void SetupVulkanWindow(ImGui_ImplVulkanH_Window* wd, VkSurfaceKHR surface
     // Select Surface Format
     const VkFormat requestSurfaceImageFormat[] = { VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM };
     const VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
-    wd->Surface = surface;
-    wd->SurfaceFormat = ImGui_ImplVulkanH_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_COUNTOF(requestSurfaceImageFormat), requestSurfaceColorSpace);
+    wd->SurfaceFormat = ImGui_ImplVulkanH_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace);
 
     // Select Present Mode
 #ifdef APP_USE_UNLIMITED_FRAME_RATE
@@ -234,12 +234,12 @@ static void SetupVulkanWindow(ImGui_ImplVulkanH_Window* wd, VkSurfaceKHR surface
 #else
     VkPresentModeKHR present_modes[] = { VK_PRESENT_MODE_FIFO_KHR };
 #endif
-    wd->PresentMode = ImGui_ImplVulkanH_SelectPresentMode(g_PhysicalDevice, wd->Surface, &present_modes[0], IM_COUNTOF(present_modes));
+    wd->PresentMode = ImGui_ImplVulkanH_SelectPresentMode(g_PhysicalDevice, wd->Surface, &present_modes[0], IM_ARRAYSIZE(present_modes));
     //printf("[vulkan] Selected PresentMode = %d\n", wd->PresentMode);
 
     // Create SwapChain, RenderPass, Framebuffer, etc.
     IM_ASSERT(g_MinImageCount >= 2);
-    ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, wd, g_QueueFamily, g_Allocator, width, height, g_MinImageCount, 0);
+    ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, wd, g_QueueFamily, g_Allocator, width, height, g_MinImageCount);
 }
 
 static void CleanupVulkan()
@@ -256,23 +256,24 @@ static void CleanupVulkan()
     vkDestroyInstance(g_Instance, g_Allocator);
 }
 
-static void CleanupVulkanWindow(ImGui_ImplVulkanH_Window* wd)
+static void CleanupVulkanWindow()
 {
-    ImGui_ImplVulkanH_DestroyWindow(g_Instance, g_Device, wd, g_Allocator);
-    vkDestroySurfaceKHR(g_Instance, wd->Surface, g_Allocator);
+    ImGui_ImplVulkanH_DestroyWindow(g_Instance, g_Device, &g_MainWindowData, g_Allocator);
 }
 
 static void FrameRender(ImGui_ImplVulkanH_Window* wd, ImDrawData* draw_data)
 {
+    VkResult err;
+
     VkSemaphore image_acquired_semaphore  = wd->FrameSemaphores[wd->SemaphoreIndex].ImageAcquiredSemaphore;
     VkSemaphore render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore;
-    VkResult err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, image_acquired_semaphore, VK_NULL_HANDLE, &wd->FrameIndex);
+    err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, image_acquired_semaphore, VK_NULL_HANDLE, &wd->FrameIndex);
     if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
+    {
         g_SwapChainRebuild = true;
-    if (err == VK_ERROR_OUT_OF_DATE_KHR)
         return;
-    if (err != VK_SUBOPTIMAL_KHR)
-        check_vk_result(err);
+    }
+    check_vk_result(err);
 
     ImGui_ImplVulkanH_Frame* fd = &wd->Frames[wd->FrameIndex];
     {
@@ -341,11 +342,11 @@ static void FramePresent(ImGui_ImplVulkanH_Window* wd)
     info.pImageIndices = &wd->FrameIndex;
     VkResult err = vkQueuePresentKHR(g_Queue, &info);
     if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
+    {
         g_SwapChainRebuild = true;
-    if (err == VK_ERROR_OUT_OF_DATE_KHR)
         return;
-    if (err != VK_SUBOPTIMAL_KHR)
-        check_vk_result(err);
+    }
+    check_vk_result(err);
     wd->SemaphoreIndex = (wd->SemaphoreIndex + 1) % wd->SemaphoreCount; // Now we can use the next set of semaphores
 }
 
@@ -358,8 +359,7 @@ int main(int, char**)
 
     // Create window with Vulkan context
     glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
-    float main_scale = ImGui_ImplGlfw_GetContentScaleForMonitor(glfwGetPrimaryMonitor()); // Valid on GLFW 3.3+ only
-    GLFWwindow* window = glfwCreateWindow((int)(1280 * main_scale), (int)(800 * main_scale), "Dear ImGui GLFW+Vulkan example", nullptr, nullptr);
+    GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+Vulkan example", nullptr, nullptr);
     if (!glfwVulkanSupported())
     {
         printf("GLFW: Vulkan Not Supported\n");
@@ -390,20 +390,26 @@ int main(int, char**)
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
+    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
+    //io.ConfigViewportsNoAutoMerge = true;
+    //io.ConfigViewportsNoTaskBarIcon = true;
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsLight();
 
-    // Setup scaling
+    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
     ImGuiStyle& style = ImGui::GetStyle();
-    style.ScaleAllSizes(main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
-    style.FontScaleDpi = main_scale;        // Set initial font scale. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
 
     // Setup Platform/Renderer backends
     ImGui_ImplGlfw_InitForVulkan(window, true);
     ImGui_ImplVulkan_InitInfo init_info = {};
-    //init_info.ApiVersion = VK_API_VERSION_1_3;              // Pass in your value of VkApplicationInfo::apiVersion, otherwise will default to header version.
     init_info.Instance = g_Instance;
     init_info.PhysicalDevice = g_PhysicalDevice;
     init_info.Device = g_Device;
@@ -411,31 +417,29 @@ int main(int, char**)
     init_info.Queue = g_Queue;
     init_info.PipelineCache = g_PipelineCache;
     init_info.DescriptorPool = g_DescriptorPool;
+    init_info.RenderPass = wd->RenderPass;
+    init_info.Subpass = 0;
     init_info.MinImageCount = g_MinImageCount;
     init_info.ImageCount = wd->ImageCount;
+    init_info.MSAASamples = VK_SAMPLE_COUNT_1_BIT;
     init_info.Allocator = g_Allocator;
-    init_info.PipelineInfoMain.RenderPass = wd->RenderPass;
-    init_info.PipelineInfoMain.Subpass = 0;
-    init_info.PipelineInfoMain.MSAASamples = VK_SAMPLE_COUNT_1_BIT;
     init_info.CheckVkResultFn = check_vk_result;
     ImGui_ImplVulkan_Init(&init_info);
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 
     // Our state
@@ -459,7 +463,7 @@ int main(int, char**)
         if (fb_width > 0 && fb_height > 0 && (g_SwapChainRebuild || g_MainWindowData.Width != fb_width || g_MainWindowData.Height != fb_height))
         {
             ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
-            ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, wd, g_QueueFamily, g_Allocator, fb_width, fb_height, g_MinImageCount, 0);
+            ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, fb_width, fb_height, g_MinImageCount);
             g_MainWindowData.FrameIndex = 0;
             g_SwapChainRebuild = false;
         }
@@ -513,17 +517,25 @@ int main(int, char**)
 
         // Rendering
         ImGui::Render();
-        ImDrawData* draw_data = ImGui::GetDrawData();
-        const bool is_minimized = (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f);
-        if (!is_minimized)
+        ImDrawData* main_draw_data = ImGui::GetDrawData();
+        const bool main_is_minimized = (main_draw_data->DisplaySize.x <= 0.0f || main_draw_data->DisplaySize.y <= 0.0f);
+        wd->ClearValue.color.float32[0] = clear_color.x * clear_color.w;
+        wd->ClearValue.color.float32[1] = clear_color.y * clear_color.w;
+        wd->ClearValue.color.float32[2] = clear_color.z * clear_color.w;
+        wd->ClearValue.color.float32[3] = clear_color.w;
+        if (!main_is_minimized)
+            FrameRender(wd, main_draw_data);
+
+        // Update and Render additional Platform Windows
+        if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
         {
-            wd->ClearValue.color.float32[0] = clear_color.x * clear_color.w;
-            wd->ClearValue.color.float32[1] = clear_color.y * clear_color.w;
-            wd->ClearValue.color.float32[2] = clear_color.z * clear_color.w;
-            wd->ClearValue.color.float32[3] = clear_color.w;
-            FrameRender(wd, draw_data);
-            FramePresent(wd);
+            ImGui::UpdatePlatformWindows();
+            ImGui::RenderPlatformWindowsDefault();
         }
+
+        // Present Main Platform Window
+        if (!main_is_minimized)
+            FramePresent(wd);
     }
 
     // Cleanup
@@ -533,7 +545,7 @@ int main(int, char**)
     ImGui_ImplGlfw_Shutdown();
     ImGui::DestroyContext();
 
-    CleanupVulkanWindow(&g_MainWindowData);
+    CleanupVulkanWindow();
     CleanupVulkan();
 
     glfwDestroyWindow(window);

examples/example_glfw_wgpu/CMakeLists.txt

@@ -1,40 +1,23 @@
-# Building for desktop with Dawn:
+# Building for desktop (WebGPU-native) with Dawn:
 #  1. git clone https://github.com/google/dawn dawn
 #  2. cmake -B build -DIMGUI_DAWN_DIR=dawn
 #  3. cmake --build build
 # The resulting binary will be found at one of the following locations:
-#   * build/example_glfw_wgpu[.exe] or build/Debug/example_glfw_wgpu[.exe]
-
-# Building for desktop with WGPU-Native:
-#  1. download WGPU-Native autogenerated binary modules for your platform/compiler from: https://github.com/gfx-rs/wgpu-native/releases
-#  2. unzip the downloaded file in your_preferred_folder
-#  3. cmake -B build -DIMGUI_WGPU_DIR=your_preferred_folder  ("full path" or "relative" starting from current directory)
-#  4. cmake --build build
-# The resulting binary will be found at one of the following locations:
-#   * build/example_glfw_wgpu[.exe] or build/Debug/example_glfw_wgpu[.exe]
-
-# Building for desktop with WGVK (MUCH EASIER)
-#  1. git clone https://github.com/manuel5975p/WGVK dawn
-#  2. cmake -B build -DIMGUI_WGVK_DIR=wgvk
-#  3. cmake --build build
-# The resulting binary will be found at one of the following locations:
-#   * build/example_glfw_wgpu[.exe] or build/Debug/example_glfw_wgpu[.exe]
+#   * build/Debug/example_glfw_wgpu[.exe]
+#   * build/example_glfw_wgpu[.exe]
 
 # Building for Emscripten:
 #  1. Install Emscripten SDK following the instructions: https://emscripten.org/docs/getting_started/downloads.html
 #  2. Install Ninja build system
 #  3. emcmake cmake -G Ninja -B build
-#       (optional) -DIMGUI_EMSCRIPTEN_WEBGPU_FLAG="--use-port=path/to/emdawnwebgpu_package/emdawnwebgpu.port.py", see ReadMe.md
 #  3. cmake --build build
 #  4. emrun build/index.html
 
-cmake_minimum_required(VERSION 3.22) # Dawn requires CMake >= 3.22
+cmake_minimum_required(VERSION 3.10.2)
 project(imgui_example_glfw_wgpu C CXX)
 
-set(IMGUI_EXECUTABLE example_glfw_wgpu)
-
 if(NOT CMAKE_BUILD_TYPE)
-    set(CMAKE_BUILD_TYPE Debug CACHE STRING "" FORCE)
+  set(CMAKE_BUILD_TYPE Debug CACHE STRING "" FORCE)
 endif()
 
 set(CMAKE_CXX_STANDARD 17) # Dawn requires C++17
@@ -42,182 +25,93 @@ set(CMAKE_CXX_STANDARD 17) # Dawn requires C++17
 # Dear ImGui
 set(IMGUI_DIR ../../)
 
-set(IMGUI_EXAMPLE_SOURCE_FILES
-        # Example code
-        main.cpp
-        # Dear ImGui Backend files
-        ${IMGUI_DIR}/backends/imgui_impl_glfw.cpp
-        ${IMGUI_DIR}/backends/imgui_impl_wgpu.cpp
-        # Dear ImGui files
-        ${IMGUI_DIR}/imgui.cpp
-        ${IMGUI_DIR}/imgui_draw.cpp
-        ${IMGUI_DIR}/imgui_demo.cpp
-        ${IMGUI_DIR}/imgui_tables.cpp
-        ${IMGUI_DIR}/imgui_widgets.cpp
-)
-
+# Libraries
 if(EMSCRIPTEN)
-    if(EMSCRIPTEN_VERSION VERSION_GREATER_EQUAL "4.0.10")
-        set(IMGUI_EMSCRIPTEN_WEBGPU_FLAG "--use-port=emdawnwebgpu" CACHE STRING "Default to --use-port=emdawnwebgpu. You can override to provide your own local port.")
-    else()
-        message(FATAL_ERROR "emdawnwebgpu needs EMSCRIPTEN version >= 4.0.10")
-    endif()
+  if(EMSCRIPTEN_VERSION VERSION_GREATER_EQUAL "3.1.57")
+    set(IMGUI_EMSCRIPTEN_GLFW3 "--use-port=contrib.glfw3" CACHE STRING "Choose between --use-port=contrib.glfw3 and -sUSE_GLFW=3 for GLFW implementation (default to --use-port=contrib.glfw3)")
+  else()
+    # cannot use contrib.glfw3 prior to 3.1.57
+    set(IMGUI_EMSCRIPTEN_GLFW3 "-sUSE_GLFW=3" CACHE STRING "Use -sUSE_GLFW=3 for GLFW implementation" FORCE)
+  endif()
+  set(LIBRARIES glfw)
+  add_compile_options(-sDISABLE_EXCEPTION_CATCHING=1 -DIMGUI_DISABLE_FILE_FUNCTIONS=1)
+else()
+  # Dawn wgpu desktop
+  set(DAWN_FETCH_DEPENDENCIES ON)
+  set(IMGUI_DAWN_DIR CACHE PATH "Path to Dawn repository")
+  if (NOT IMGUI_DAWN_DIR)
+    message(FATAL_ERROR "Please specify the Dawn repository by setting IMGUI_DAWN_DIR")
+  endif()
 
-    if(NOT IMGUI_EMSCRIPTEN_GLFW3)
-        # Defaults to contrib.glfw3 because Emscripten version is > 3.1.57
-        set(IMGUI_EMSCRIPTEN_GLFW3 "--use-port=contrib.glfw3" CACHE STRING "Choose between --use-port=contrib.glfw3 and -sUSE_GLFW=3 for GLFW implementation (default to --use-port=contrib.glfw3)")
-    endif()
+  option(DAWN_FETCH_DEPENDENCIES "Use fetch_dawn_dependencies.py as an alternative to using depot_tools" ON)
 
-    set(LIBRARIES glfw)
-    add_compile_options(-sDISABLE_EXCEPTION_CATCHING=1 -DIMGUI_DISABLE_FILE_FUNCTIONS=1)
-else() # Native/Desktop build
+  # Dawn builds many things by default - disable things we don't need
+  option(DAWN_BUILD_SAMPLES "Enables building Dawn's samples" OFF)
+  option(TINT_BUILD_CMD_TOOLS "Build the Tint command line tools" OFF)
+  option(TINT_BUILD_DOCS "Build documentation" OFF)
+  option(TINT_BUILD_TESTS "Build tests" OFF)
+  if (NOT APPLE)
+    option(TINT_BUILD_MSL_WRITER "Build the MSL output writer" OFF)
+  endif()
+  if(WIN32)
+    option(TINT_BUILD_SPV_READER "Build the SPIR-V input reader" OFF)
+    option(TINT_BUILD_WGSL_READER "Build the WGSL input reader" ON)
+    option(TINT_BUILD_GLSL_WRITER "Build the GLSL output writer" OFF)
+    option(TINT_BUILD_GLSL_VALIDATOR "Build the GLSL output validator" OFF)
+    option(TINT_BUILD_SPV_WRITER "Build the SPIR-V output writer" OFF)
+    option(TINT_BUILD_WGSL_WRITER "Build the WGSL output writer" ON)
+  endif()
 
-    # Check DAWN/WGPU/WGVK directory
-    # If it's Native/Desktop build, IMGUI_DAWN_DIR or IMGUI_WGPU_DIR or IMGUI_WGVK_DIR must be specified
-    if(NOT IMGUI_DAWN_DIR AND NOT IMGUI_WGPU_DIR AND NOT IMGUI_WGVK_DIR)
-        message(FATAL_ERROR "Please specify one of IMGUI_DAWN_DIR/IMGUI_WGPU_DIR/IMGUI_WGVK_DIR base directory.")
-    endif()
-    if((IMGUI_DAWN_DIR AND (IMGUI_WGPU_DIR OR IMGUI_WGVK_DIR)) OR (IMGUI_WGPU_DIR AND IMGUI_WGVK_DIR))
-        message(FATAL_ERROR "Please specify only one of IMGUI_DAWN_DIR/IMGUI_WGPU_DIR/IMGUI_WGVK_DIR base directory.")
-    endif()
+  add_subdirectory("${IMGUI_DAWN_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/dawn" EXCLUDE_FROM_ALL)
 
-    if(APPLE) # Add SDL2 module to get Surface, with libs and file property for MacOS build
-        set_source_files_properties(${IMGUI_DIR}/backends/imgui_impl_wgpu.cpp PROPERTIES COMPILE_FLAGS "-x objective-c++")
-        set(OS_LIBRARIES "-framework CoreFoundation -framework QuartzCore -framework Metal -framework MetalKit -framework Cocoa")
-    endif()
-    
-    find_package(glfw3 REQUIRED)
-
-    if(IMGUI_DAWN_DIR)
-        list(APPEND CMAKE_PREFIX_PATH ${IMGUI_DAWN_DIR})
-        find_package(Dawn) # Search for a Dawn installation using IMGUI_DAWN_DIR in CMAKE_PREFIX_PATH
-        if(Dawn_FOUND)
-            message("Dawn Installation has been found!")
-            set(LIBRARIES dawn::webgpu_dawn glfw ${OS_LIBRARIES})
-        else()
-            set(IMGUI_DAWN_DIR CACHE PATH "Path to Dawn repository")
-
-            option(DAWN_FETCH_DEPENDENCIES "Use fetch_dawn_dependencies.py as an alternative to using depot_tools" ON)
-            set(DAWN_BUILD_MONOLITHIC_LIBRARY "STATIC" CACHE STRING "Build monolithic library: SHARED, STATIC, or OFF.")
-
-            option(DAWN_USE_GLFW OFF) # disable builtin GLFW in DAWN when we use SDL2 / SDL3
-
-            # Dawn builds many things by default - disable things we don't need
-            option(DAWN_BUILD_SAMPLES "Enables building Dawn's samples" OFF)
-            option(TINT_BUILD_CMD_TOOLS "Build the Tint command line tools" OFF)
-            option(TINT_BUILD_DOCS "Build documentation" OFF)
-            option(TINT_BUILD_TESTS "Build tests" OFF)
-            if(NOT APPLE)
-                option(TINT_BUILD_MSL_WRITER "Build the MSL output writer" OFF)
-            endif()
-            if(WIN32)
-                option(DAWN_FORCE_SYSTEM_COMPONENT_LOAD "Allow system component fallback" ON)
-                option(TINT_BUILD_SPV_READER "Build the SPIR-V input reader" OFF)
-                option(TINT_BUILD_WGSL_READER "Build the WGSL input reader" ON)
-                option(TINT_BUILD_GLSL_WRITER "Build the GLSL output writer" OFF)
-                option(TINT_BUILD_GLSL_VALIDATOR "Build the GLSL output validator" OFF)
-                option(TINT_BUILD_SPV_WRITER "Build the SPIR-V output writer" ON)
-                option(TINT_BUILD_WGSL_WRITER "Build the WGSL output writer" ON)
-            endif()
-            # check if WAYLAND is the current Session Type and enable DAWN_USE_WAYLAND Wayland option @compile time
-            # You can override this using: cmake -DDAWN_USE_WAYLAND=X (X = ON | OFF)
-            if(LINUX)
-                if($ENV{XDG_SESSION_TYPE} MATCHES wayland)
-                    option(DAWN_USE_WAYLAND "Enable support for Wayland surface" ON)
-                endif()
-            endif()
-
-            add_subdirectory("${IMGUI_DAWN_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/dawn" EXCLUDE_FROM_ALL)
-
-            set(LIBRARIES webgpu_dawn glfw)
-         endif()
-    endif()
-
-    if(IMGUI_WGPU_DIR)
-        set(WGPU_NATIVE_LIB_DIR ${IMGUI_WGPU_DIR}/lib)
-        find_library(WGPU_LIBRARY NAMES libwgpu_native.a wgpu_native.lib wgpu_native HINTS ${WGPU_NATIVE_LIB_DIR} REQUIRED)
-        if(WIN32)
-            set(OS_LIBRARIES d3dcompiler ws2_32 userenv bcrypt ntdll opengl32 Propsys RuntimeObject)
-        elseif(UNIX AND NOT APPLE)
-            set(OS_LIBRARIES "-lm -ldl")
-        endif()
-
-        set(LIBRARIES glfw ${WGPU_LIBRARY} ${OS_LIBRARIES})
-    endif()
-
-    if(IMGUI_WGVK_DIR)
-    endif()
+  set(LIBRARIES webgpu_dawn webgpu_cpp webgpu_glfw glfw)
 endif()
 
-add_executable(${IMGUI_EXECUTABLE} ${IMGUI_EXAMPLE_SOURCE_FILES})
-
-target_include_directories(${IMGUI_EXECUTABLE} PUBLIC
-        ${IMGUI_DIR}
-        ${IMGUI_DIR}/backends
+add_executable(example_glfw_wgpu
+  main.cpp
+  # backend files
+  ${IMGUI_DIR}/backends/imgui_impl_glfw.cpp
+  ${IMGUI_DIR}/backends/imgui_impl_wgpu.cpp
+  # Dear ImGui files
+  ${IMGUI_DIR}/imgui.cpp
+  ${IMGUI_DIR}/imgui_draw.cpp
+  ${IMGUI_DIR}/imgui_demo.cpp
+  ${IMGUI_DIR}/imgui_tables.cpp
+  ${IMGUI_DIR}/imgui_widgets.cpp
+)
+IF(NOT EMSCRIPTEN)
+  target_compile_definitions(example_glfw_wgpu PUBLIC
+    "IMGUI_IMPL_WEBGPU_BACKEND_DAWN"
+  )
+endif()
+target_include_directories(example_glfw_wgpu PUBLIC
+  ${IMGUI_DIR}
+  ${IMGUI_DIR}/backends
 )
 
-target_compile_definitions(${IMGUI_EXECUTABLE} PUBLIC "IMGUI_EXAMPLE_GLFW_WGPU")
+target_link_libraries(example_glfw_wgpu PUBLIC ${LIBRARIES})
 
-# compiler option only for IMGUI_EXAMPLE_SOURCE_FILES
-if (MSVC)
-    target_compile_options(${IMGUI_EXECUTABLE} PUBLIC /W4) # warning level 4
-else()
-    target_compile_options(${IMGUI_EXECUTABLE} PUBLIC -Wall) # -Wextra -Wpedantic
-endif()
-
-# In this example IMGUI_IMPL_WEBGPU_BACKEND_DAWN / IMGUI_IMPL_WEBGPU_BACKEND_WGPU internal define is set according to:
-#   EMSCRIPTEN: by used FLAG
-#     --use-port=emdawnwebgpu --> IMGUI_IMPL_WEBGPU_BACKEND_DAWN defined
-#   NATIVE: by used SDK installation directory
-#     if IMGUI_DAWN_DIR is valid --> IMGUI_IMPL_WEBGPU_BACKEND_DAWN defined
-#     if IMGUI_WGPU_DIR is valid --> IMGUI_IMPL_WEBGPU_BACKEND_WGPU defined
-
-if(NOT EMSCRIPTEN) # WegGPU-Native settings
-    # Set IMGUI_IMPL_WEBGPU_BACKEND_XXXX based on the SDK (directory) used
-    if(IMGUI_DAWN_DIR)
-        target_compile_definitions(${IMGUI_EXECUTABLE} PUBLIC "IMGUI_IMPL_WEBGPU_BACKEND_DAWN")
-        if(NOT Dawn_FOUND)
-            target_link_libraries(${IMGUI_EXECUTABLE} INTERFACE webgpu_cpp)
-        endif()
-    endif()
-    if(IMGUI_WGPU_DIR)
-        target_compile_definitions(${IMGUI_EXECUTABLE} PUBLIC "IMGUI_IMPL_WEBGPU_BACKEND_WGPU")
-        target_include_directories(${IMGUI_EXECUTABLE} PUBLIC ${IMGUI_WGPU_DIR}/include)
-    endif()
-    if(IMGUI_WGVK_DIR)
-        target_sources(${IMGUI_EXECUTABLE} PRIVATE ${IMGUI_WGVK_DIR}/src/wgvk.c)
-        target_compile_definitions(${IMGUI_EXECUTABLE} PUBLIC "IMGUI_IMPL_WEBGPU_BACKEND_WGVK")
-        target_include_directories(${IMGUI_EXECUTABLE} PUBLIC ${IMGUI_WGVK_DIR}/include)
-        if (MSVC)
-           target_compile_options(${IMGUI_EXECUTABLE} PUBLIC /std:clatest /experimental:c11atomics)
-        endif()
-    endif()
-
-    target_link_libraries(${IMGUI_EXECUTABLE} PUBLIC ${LIBRARIES})
-
-else() # Emscripten settings
-    set(CMAKE_EXECUTABLE_SUFFIX ".html")
-
-    if("${IMGUI_EMSCRIPTEN_GLFW3}" STREQUAL "--use-port=contrib.glfw3")
-        target_compile_options(${IMGUI_EXECUTABLE} PUBLIC "${IMGUI_EMSCRIPTEN_GLFW3}")
-    endif()
-    message(STATUS "Using ${IMGUI_EMSCRIPTEN_GLFW3} GLFW implementation")
-
-    target_compile_options(${IMGUI_EXECUTABLE} PUBLIC "${IMGUI_EMSCRIPTEN_WEBGPU_FLAG}")
-    target_compile_definitions(${IMGUI_EXECUTABLE} PUBLIC "IMGUI_IMPL_WEBGPU_BACKEND_DAWN")
-    message(STATUS "Using ${IMGUI_EMSCRIPTEN_WEBGPU_FLAG} WebGPU implementation")
-
-    target_link_options(${IMGUI_EXECUTABLE} PRIVATE
-            "${IMGUI_EMSCRIPTEN_WEBGPU_FLAG}"
-            "${IMGUI_EMSCRIPTEN_GLFW3}"
-            "-sWASM=1"
-            "-sASYNCIFY=1"
-            "-sALLOW_MEMORY_GROWTH=1"
-            "-sNO_EXIT_RUNTIME=0"
-            "-sASSERTIONS=1"
-            "-sDISABLE_EXCEPTION_CATCHING=1"
-            "-sNO_FILESYSTEM=1"
-            "--shell-file=${CMAKE_CURRENT_LIST_DIR}/../libs/emscripten/shell_minimal.html"
+# Emscripten settings
+if(EMSCRIPTEN)
+  if("${IMGUI_EMSCRIPTEN_GLFW3}" STREQUAL "--use-port=contrib.glfw3")
+    target_compile_options(example_glfw_wgpu PUBLIC
+        "${IMGUI_EMSCRIPTEN_GLFW3}"
     )
-    set_target_properties(${IMGUI_EXECUTABLE} PROPERTIES OUTPUT_NAME "index")
+  endif()
+  message(STATUS "Using ${IMGUI_EMSCRIPTEN_GLFW3} GLFW implementation")
+  target_link_options(example_glfw_wgpu PRIVATE
+    "-sUSE_WEBGPU=1"
+    "${IMGUI_EMSCRIPTEN_GLFW3}"
+    "-sWASM=1"
+    "-sALLOW_MEMORY_GROWTH=1"
+    "-sNO_EXIT_RUNTIME=0"
+    "-sASSERTIONS=1"
+    "-sDISABLE_EXCEPTION_CATCHING=1"
+    "-sNO_FILESYSTEM=1"
+  )
+  set_target_properties(example_glfw_wgpu PROPERTIES OUTPUT_NAME "index")
+  # copy our custom index.html to build directory
+  add_custom_command(TARGET example_glfw_wgpu POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_CURRENT_LIST_DIR}/web/index.html" $<TARGET_FILE_DIR:example_glfw_wgpu>
+  )
 endif()

examples/example_glfw_wgpu/Makefile.emscripten

@@ -6,8 +6,8 @@
 # This Makefile assumes you have loaded emscripten's environment.
 # (On Windows, you may need to execute emsdk_env.bat or encmdprompt.bat ahead)
 #
-# Running `make -f Makefile.emscripten` will produce three files:
-#  - web/index.html
+# Running `make` will produce three files:
+#  - web/index.html (current stored in the repository)
 #  - web/index.js
 #  - web/index.wasm
 #
@@ -16,11 +16,11 @@
 CC = emcc
 CXX = em++
 WEB_DIR = web
-EXE = $(WEB_DIR)/index.html
+EXE = $(WEB_DIR)/index.js
 IMGUI_DIR = ../..
 SOURCES = main.cpp
-SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glfw.cpp $(IMGUI_DIR)/backends/imgui_impl_wgpu.cpp
 SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
+SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glfw.cpp $(IMGUI_DIR)/backends/imgui_impl_wgpu.cpp
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 CPPFLAGS =
@@ -32,17 +32,9 @@ EMS =
 ##---------------------------------------------------------------------
 
 # ("EMS" options gets added to both CPPFLAGS and LDFLAGS, whereas some options are for linker only)
-# Note: For glfw, we use emscripten-glfw port (contrib.glfw3) instead of (-s USE_GLFW=3) to get a better support for High DPI displays.
-EMS += -s DISABLE_EXCEPTION_CATCHING=1 --use-port=contrib.glfw3
-LDFLAGS += -s WASM=1
-LDFLAGS += -s ALLOW_MEMORY_GROWTH=1
-LDFLAGS += -s ASYNCIFY=1
-LDFLAGS += -s NO_EXIT_RUNTIME=0
-LDFLAGS += -s ASSERTIONS=1
-
-# Using Dawn-based WebGPU port (requires Emscripten >= 4.0.10)
-EMS += --use-port=emdawnwebgpu
-LDFLAGS += --use-port=emdawnwebgpu
+EMS += -s DISABLE_EXCEPTION_CATCHING=1
+LDFLAGS += -s USE_GLFW=3 -s USE_WEBGPU=1
+LDFLAGS += -s WASM=1 -s ALLOW_MEMORY_GROWTH=1 -s NO_EXIT_RUNTIME=0 -s ASSERTIONS=1
 
 # Build as single file (binary text encoded in .html file)
 #LDFLAGS += -sSINGLE_FILE
@@ -67,7 +59,7 @@ endif
 CPPFLAGS += -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 #CPPFLAGS += -g
 CPPFLAGS += -Wall -Wformat -Os $(EMS)
-LDFLAGS += --shell-file ../libs/emscripten/shell_minimal.html
+#LDFLAGS += --shell-file shell_minimal.html
 LDFLAGS += $(EMS)
 
 ##---------------------------------------------------------------------

examples/example_glfw_wgpu/README.md

@@ -1,141 +1,4 @@
-## How to Build     
-
-
----
-
-### Using CMake
-#### Building for desktop (WebGPU-native) with Google Dawn:
- 1. `git clone https://github.com/google/dawn dawn`
- 2. `cmake -B build -DIMGUI_DAWN_DIR=dawn`
- 3. `cmake --build build`
-The resulting binary will be found at one of the following locations:
-  * build/Debug/example_glfw_wgpu[.exe]
-  * build/example_glfw_wgpu[.exe]
-
-#### Building for desktop (WebGPU-Native) with WGPU:
- 1. download WGPU-Native autogenerated binary modules for your platform/compiler from: https://github.com/gfx-rs/wgpu-native/releases
- 2. unzip the downloaded file in `your_preferred_folder`
- 3. `cmake -B build -DIMGUI_WGPU_DIR=your_preferred_folder`  ("full path" or "relative" starting from current directory)
- 4. `cmake --build build`
-The resulting binary will be found at one of the following locations:
-  * build/Debug/example_glfw_wgpu[.exe]
-  * build/example_glfw_wgpu[.exe]
-
-#### Building for Emscripten:
- 1. Install Emscripten SDK following the instructions: https://emscripten.org/docs/getting_started/downloads.html
- 2. Install Ninja build system
- 3. `emcmake cmake -G Ninja -B build`
-    - (optional) `-DIMGUI_EMSCRIPTEN_WEBGPU_FLAG="--use-port=path/to/emdawnwebgpu_package/emdawnwebgpu.port.py"`, see below
- 4. `cmake --build build`
-
-#### Sync Emscripten with latest Google Dawn:
-If you want to sync Emscripten with latest DAWN release it's necessary to download the `port-emdawnwgpu-package` (released daily by Google) here:
-https://github.com/google/dawn/releases
-Unpack it in your preferred folder and to replace the step 3 with: 
-
-3. `emcmake cmake -DIMGUI_EMSCRIPTEN_WEBGPU_FLAG="--use-port=path/to/emdawnwebgpu_package/emdawnwebgpu.port.py" -G Ninja -B build`
-
-**N.B.**
-For the WASM code produced by Emscripten to work correctly, it will also be necessary to have the "corresponding" (or newer) version of Google Canary (nightly build for developers) that includes the latest changes
-
-
----
-
-### CMake by step
-
-#### Generate Dawn Native:
-
-- `cmake -G Ninja -DIMGUI_DAWN_DIR=path_to_sdk_dir -B where_to_build_dir`
-   - Using `IMGUI_DAWN_DIR` set `IMGUI_IMPL_WEBGPU_BACKEND_DAWN` compiler define 
-
-#### Generate WGPU Native:
-
-- `cmake -G Ninja -DIMGUI_WGPU_DIR=path_to_sdk_dir -B where_to_build_dir`
-
-   - Using `IMGUI_WGPU_DIR` set `IMGUI_IMPL_WEBGPU_BACKEND_WGPU` compiler define 
-
-#### Generate Emscripten:
-
-- `emcmake cmake -G Ninja -B where_to_build_dir`\
-CMake checks the EMSCRIPEN version then:
-   - if EMS >= 4.0.10 uses `--use-port=emdawnwebgpu` flag to build  
-      - it set `IMGUI_IMPL_WEBGPU_BACKEND_DAWN` compiler define 
-   - if EMS < 4.0.10 the build aborts (`-sUSE_WEBGPU=1` is no longer supported by our examples and our WGPU backend)
-
-#### Generate Emscripten using external WebGPU library (emdawnwebgpu_pkg)
-
-- `emcmake cmake -G Ninja -DIMGUI_EMSCRIPTEN_WEBGPU_FLAG="--use-port=path_to_emdawnwebgpu_pkg" -B where_to_build_dir`
-   - it set `IMGUI_IMPL_WEBGPU_BACKEND_DAWN` compiler define 
-   - *To use external WebGPU library it's necessary to have EMS >= 4.0.10 or the minimum requirements specified by the package:*
-      - https://github.com/google/dawn/releases 
-
-#### Build time
-
-Once the procedure for the specific builder is generated, the build command is **always the same**:
-
-- Build using CMake
-   - `cmake --build where_to_build_dir`
-      - It will use selected builder to build the example.
-
-- Build explicitly:
-   - `cd where_to_build_dir`
-   - `ninja` 
-      - This is the builder chosen during the generation phase  
-
----
-
-### CMake useful options
-#### Generator types (alternative to **ninja** builder):
-- `-G Ninja` to build with __ninja__ builder
-- `-G "Unix Makefiles"` to build with __make__ builder
-- `-G "Visual Studio 17 2022" -A x64` to create a VS 2022 solution (.sln) file, Windows only 
-   - **Native build only**
-   - Not **officially** supported to build Google Dawn
-
-Example:
-- using **make** instead **ninja**:
-   - `cmake -G "Unix Makefiles" -DIMGUI_DAWN_DIR=path_to_sdk_dir -B where_to_build_dir`
-
-**Syntax is case sensitive and the "" are necessary in case of spaces between words*
-
-#### Directories
-- The directory path can be absolute or relative (starting from the current directory)
-- It's necessary to use different `where_to_build_dir` for different CMake generations
-
-
-#### Build type
-The default build type is **Debug**
-It is possible to use a different build type using:
-- `-DCMAKE_BUILD_TYPE=Release`
-- `-DCMAKE_BUILD_TYPE=MinSizeRel`
-- `-DCMAKE_BUILD_TYPE=RelWithDebInfo`
-
-Example:
-- building **Release**:
-   - `cmake -G ninja -DIMGUI_WGPU_DIR=path_to_sdk_dir -DCMAKE_BUILD_TYPE=Release -B where_to_build_dir ` 
-
-#### GLFW / SDL2 / SDL3 includes, libraries, search paths and package manager
-
-Includes and libraries, by default, are searched in system/compiler paths (environment variables): you can add the path to your development tools to the environment variables without having to modify the `CMakeLists.txt` file.
-- e.g. CLang search in path specified from the following environment variables: 
-    - include files: CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH
-    - library files: LIBRARY_PATH
-
-If you are using a package manager (**vcpkg** / **conan** / ... ) you need/can to specify it, adding to cmake command:
-- `-DCMAKE_TOOLCHAIN_FILE=path/to/package_manager.cmake`
-          
-Examples:
-
-- using **vcpkg** package manager it's necessary adding:
-   - `-DCMAKE_TOOLCHAIN_FILE=<vcpkg_root_dir>/scripts/buildsystems/vcpkg.cmake`
-
-- full cmake command using **vcpkg** package manager:
-   - `cmake -G Ninja -DIMGUI_DAWN_DIR=path_to_sdk_dir -DCMAKE_TOOLCHAIN_FILE=<vcpkg_root_dir>/scripts/buildsystems/vcpkg.cmake -B where_to_build_dir`
-
----
-
-
-### Using makefile 
+## How to Build
 
 - You need to install Emscripten from https://emscripten.org/docs/getting_started/downloads.html, and have the environment variables set, as described in https://emscripten.org/docs/getting_started/downloads.html#installation-instructions
 
@@ -147,8 +10,6 @@ Examples:
 
 - Requires recent Emscripten as WGPU is still a work-in-progress API.
 
----
-
 ## How to Run
 
 To run on a local machine:

examples/example_glfw_wgpu/main.cpp

@@ -1,4 +1,4 @@
-// Dear ImGui: standalone example application for GLFW + WebGPU
+// Dear ImGui: standalone example application for using GLFW + WebGPU
 // - Emscripten is supported for publishing on web. See https://emscripten.org.
 // - Dawn is used as a WebGPU implementation on desktop.
 
@@ -12,44 +12,54 @@
 #include "imgui_impl_glfw.h"
 #include "imgui_impl_wgpu.h"
 #include <stdio.h>
-#include <stdlib.h>
-#include <GLFW/glfw3.h>
 
-// This example can also compile and run with Emscripten! See 'Makefile.emscripten' for details.
 #ifdef __EMSCRIPTEN__
 #include <emscripten.h>
 #include <emscripten/html5.h>
+#include <emscripten/html5_webgpu.h>
+#else
+#include <webgpu/webgpu_glfw.h>
+#endif
+
+#include <GLFW/glfw3.h>
+#include <webgpu/webgpu.h>
+#include <webgpu/webgpu_cpp.h>
+
+// This example can also compile and run with Emscripten! See 'Makefile.emscripten' for details.
+#ifdef __EMSCRIPTEN__
 #include "../libs/emscripten/emscripten_mainloop_stub.h"
 #endif
 
-#include <webgpu/webgpu.h>
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
-#include <webgpu/webgpu_cpp.h>
-#endif
-
-// Data
-static WGPUInstance             wgpu_instance = nullptr;
-static WGPUDevice               wgpu_device = nullptr;
-static WGPUSurface              wgpu_surface = nullptr;
-static WGPUQueue                wgpu_queue = nullptr;
-static WGPUSurfaceConfiguration wgpu_surface_configuration = {};
-static int                      wgpu_surface_width = 1280;
-static int                      wgpu_surface_height = 800;
+// Global WebGPU required states
+static WGPUInstance      wgpu_instance = nullptr;
+static WGPUDevice        wgpu_device = nullptr;
+static WGPUSurface       wgpu_surface = nullptr;
+static WGPUTextureFormat wgpu_preferred_fmt = WGPUTextureFormat_RGBA8Unorm;
+static WGPUSwapChain     wgpu_swap_chain = nullptr;
+static int               wgpu_swap_chain_width = 1280;
+static int               wgpu_swap_chain_height = 720;
 
 // Forward declarations
 static bool InitWGPU(GLFWwindow* window);
-WGPUSurface CreateWGPUSurface(const WGPUInstance& instance, GLFWwindow* window);
+static void CreateSwapChain(int width, int height);
 
 static void glfw_error_callback(int error, const char* description)
 {
     printf("GLFW Error %d: %s\n", error, description);
 }
 
-static void ResizeSurface(int width, int height)
+static void wgpu_error_callback(WGPUErrorType error_type, const char* message, void*)
 {
-    wgpu_surface_configuration.width = wgpu_surface_width = width;
-    wgpu_surface_configuration.height = wgpu_surface_height = height;
-    wgpuSurfaceConfigure(wgpu_surface, &wgpu_surface_configuration);
+    const char* error_type_lbl = "";
+    switch (error_type)
+    {
+    case WGPUErrorType_Validation:  error_type_lbl = "Validation"; break;
+    case WGPUErrorType_OutOfMemory: error_type_lbl = "Out of memory"; break;
+    case WGPUErrorType_Unknown:     error_type_lbl = "Unknown"; break;
+    case WGPUErrorType_DeviceLost:  error_type_lbl = "Device lost"; break;
+    default:                        error_type_lbl = "Unknown";
+    }
+    printf("%s error: %s\n", error_type_lbl, message);
 }
 
 // Main code
@@ -62,23 +72,19 @@ int main(int, char**)
     // Make sure GLFW does not initialize any graphics context.
     // This needs to be done explicitly later.
     glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
-
-    // Create window
-    float main_scale = ImGui_ImplGlfw_GetContentScaleForMonitor(glfwGetPrimaryMonitor()); // Valid on GLFW 3.3+ only
-    wgpu_surface_width = (int)(wgpu_surface_width * main_scale);
-    wgpu_surface_height = (int)(wgpu_surface_height * main_scale);
-    GLFWwindow* window = glfwCreateWindow(wgpu_surface_width, wgpu_surface_height, "Dear ImGui GLFW+WebGPU example", nullptr, nullptr);
+    GLFWwindow* window = glfwCreateWindow(wgpu_swap_chain_width, wgpu_swap_chain_height, "Dear ImGui GLFW+WebGPU example", nullptr, nullptr);
     if (window == nullptr)
         return 1;
 
     // Initialize the WebGPU environment
     if (!InitWGPU(window))
     {
-        glfwDestroyWindow(window);
+        if (window)
+            glfwDestroyWindow(window);
         glfwTerminate();
         return 1;
     }
-
+    CreateSwapChain(wgpu_swap_chain_width, wgpu_swap_chain_height);
     glfwShowWindow(window);
 
     // Setup Dear ImGui context
@@ -87,16 +93,12 @@ int main(int, char**)
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
     //ImGui::StyleColorsLight();
 
-    // Setup scaling
-    ImGuiStyle& style = ImGui::GetStyle();
-    style.ScaleAllSizes(main_scale);        // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
-    style.FontScaleDpi = main_scale;        // Set initial font scale. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
-
     // Setup Platform/Renderer backends
     ImGui_ImplGlfw_InitForOther(window, true);
 #ifdef __EMSCRIPTEN__
@@ -105,28 +107,27 @@ int main(int, char**)
     ImGui_ImplWGPU_InitInfo init_info;
     init_info.Device = wgpu_device;
     init_info.NumFramesInFlight = 3;
-    init_info.RenderTargetFormat = wgpu_surface_configuration.format;
+    init_info.RenderTargetFormat = wgpu_preferred_fmt;
     init_info.DepthStencilFormat = WGPUTextureFormat_Undefined;
     ImGui_ImplWGPU_Init(&init_info);
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    // - Our Emscripten build process allows embedding fonts to be accessible at runtime from the "fonts/" folder. See Makefile.emscripten for details.
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
+    // - Emscripten allows preloading a file or folder to be accessible at runtime. See Makefile for details.
+    //io.Fonts->AddFontDefault();
 #ifndef IMGUI_DISABLE_FILE_FUNCTIONS
-    //io.Fonts->AddFontFromFileTTF("fonts/segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("fonts/ArialUni.ttf");
+    //io.Fonts->AddFontFromFileTTF("fonts/segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("fonts/Cousine-Regular.ttf", 15.0f);
+    //io.Fonts->AddFontFromFileTTF("fonts/ProggyTiny.ttf", 10.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("fonts/ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 #endif
 
@@ -160,24 +161,11 @@ int main(int, char**)
         // React to changes in screen size
         int width, height;
         glfwGetFramebufferSize((GLFWwindow*)window, &width, &height);
-        if (width != wgpu_surface_width || height != wgpu_surface_height)
-            ResizeSurface(width, height);
-
-        // Check surface status for error. If texture is not optimal, try to reconfigure the surface.
-        WGPUSurfaceTexture surface_texture;
-        wgpuSurfaceGetCurrentTexture(wgpu_surface, &surface_texture);
-        if (ImGui_ImplWGPU_IsSurfaceStatusError(surface_texture.status))
+        if (width != wgpu_swap_chain_width || height != wgpu_swap_chain_height)
         {
-            fprintf(stderr, "Unrecoverable Surface Texture status=%#.8x\n", surface_texture.status);
-            abort();
-        }
-        if (ImGui_ImplWGPU_IsSurfaceStatusSubOptimal(surface_texture.status))
-        {
-            if (surface_texture.texture)
-                wgpuTextureRelease(surface_texture.texture);
-            if (width > 0 && height > 0)
-                ResizeSurface(width, height);
-            continue;
+            ImGui_ImplWGPU_InvalidateDeviceObjects();
+            CreateSwapChain(width, height);
+            ImGui_ImplWGPU_CreateDeviceObjects();
         }
 
         // Start the Dear ImGui frame
@@ -225,21 +213,17 @@ int main(int, char**)
         // Rendering
         ImGui::Render();
 
-        WGPUTextureViewDescriptor view_desc = {};
-        view_desc.format = wgpu_surface_configuration.format;
-        view_desc.dimension = WGPUTextureViewDimension_2D ;
-        view_desc.mipLevelCount = WGPU_MIP_LEVEL_COUNT_UNDEFINED;
-        view_desc.arrayLayerCount = WGPU_ARRAY_LAYER_COUNT_UNDEFINED;
-        view_desc.aspect = WGPUTextureAspect_All;
-
-        WGPUTextureView texture_view = wgpuTextureCreateView(surface_texture.texture, &view_desc);
+#ifndef __EMSCRIPTEN__
+        // Tick needs to be called in Dawn to display validation errors
+        wgpuDeviceTick(wgpu_device);
+#endif
 
         WGPURenderPassColorAttachment color_attachments = {};
         color_attachments.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED;
         color_attachments.loadOp = WGPULoadOp_Clear;
         color_attachments.storeOp = WGPUStoreOp_Store;
         color_attachments.clearValue = { clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w };
-        color_attachments.view = texture_view;
+        color_attachments.view = wgpuSwapChainGetCurrentTextureView(wgpu_swap_chain);
 
         WGPURenderPassDescriptor render_pass_desc = {};
         render_pass_desc.colorAttachmentCount = 1;
@@ -255,16 +239,14 @@ int main(int, char**)
 
         WGPUCommandBufferDescriptor cmd_buffer_desc = {};
         WGPUCommandBuffer cmd_buffer = wgpuCommandEncoderFinish(encoder, &cmd_buffer_desc);
-        wgpuQueueSubmit(wgpu_queue, 1, &cmd_buffer);
+        WGPUQueue queue = wgpuDeviceGetQueue(wgpu_device);
+        wgpuQueueSubmit(queue, 1, &cmd_buffer);
 
 #ifndef __EMSCRIPTEN__
-        wgpuSurfacePresent(wgpu_surface);
-        // Tick needs to be called in Dawn to display validation errors
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
-        wgpuDeviceTick(wgpu_device);
+        wgpuSwapChainPresent(wgpu_swap_chain);
 #endif
-#endif
-        wgpuTextureViewRelease(texture_view);
+
+        wgpuTextureViewRelease(color_attachments.view);
         wgpuRenderPassEncoderRelease(pass);
         wgpuCommandEncoderRelease(encoder);
         wgpuCommandBufferRelease(cmd_buffer);
@@ -278,282 +260,92 @@ int main(int, char**)
     ImGui_ImplGlfw_Shutdown();
     ImGui::DestroyContext();
 
-    wgpuSurfaceUnconfigure(wgpu_surface);
-    wgpuSurfaceRelease(wgpu_surface);
-    wgpuQueueRelease(wgpu_queue);
-    wgpuDeviceRelease(wgpu_device);
-    wgpuInstanceRelease(wgpu_instance);
-
     glfwDestroyWindow(window);
     glfwTerminate();
 
     return 0;
 }
 
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
-static WGPUAdapter RequestAdapter(wgpu::Instance& instance)
+#ifndef __EMSCRIPTEN__
+static WGPUAdapter RequestAdapter(WGPUInstance instance)
 {
-    wgpu::Adapter acquired_adapter;
-    wgpu::RequestAdapterOptions adapter_options;
-    auto onRequestAdapter = [&](wgpu::RequestAdapterStatus status, wgpu::Adapter adapter, wgpu::StringView message)
+    auto onAdapterRequestEnded = [](WGPURequestAdapterStatus status, WGPUAdapter adapter, const char* message, void* pUserData)
     {
-        if (status != wgpu::RequestAdapterStatus::Success)
-        {
-            printf("Failed to get an adapter: %s\n", message.data);
-            return;
-        }
-        acquired_adapter = std::move(adapter);
+        if (status == WGPURequestAdapterStatus_Success)
+            *(WGPUAdapter*)(pUserData) = adapter;
+        else
+            printf("Could not get WebGPU adapter: %s\n", message);
+};
+    WGPUAdapter adapter;
+    wgpuInstanceRequestAdapter(instance, nullptr, onAdapterRequestEnded, (void*)&adapter);
+    return adapter;
+}
+
+static WGPUDevice RequestDevice(WGPUAdapter& adapter)
+{
+    auto onDeviceRequestEnded = [](WGPURequestDeviceStatus status, WGPUDevice device, const char* message, void* pUserData)
+    {
+        if (status == WGPURequestDeviceStatus_Success)
+            *(WGPUDevice*)(pUserData) = device;
+        else
+            printf("Could not get WebGPU device: %s\n", message);
     };
-
-    // Synchronously (wait until) acquire Adapter
-    wgpu::Future waitAdapterFunc { instance.RequestAdapter(&adapter_options, wgpu::CallbackMode::WaitAnyOnly, onRequestAdapter) };
-    wgpu::WaitStatus waitStatusAdapter = instance.WaitAny(waitAdapterFunc, UINT64_MAX);
-    IM_ASSERT(acquired_adapter != nullptr && waitStatusAdapter == wgpu::WaitStatus::Success && "Error on Adapter request");
-    return acquired_adapter.MoveToCHandle();
+    WGPUDevice device;
+    wgpuAdapterRequestDevice(adapter, nullptr, onDeviceRequestEnded, (void*)&device);
+    return device;
 }
+#endif
 
-static WGPUDevice RequestDevice(wgpu::Instance& instance, wgpu::Adapter& adapter)
+static bool InitWGPU(GLFWwindow* window)
 {
-    // Set device callback functions
-    wgpu::DeviceDescriptor device_desc;
-    device_desc.SetDeviceLostCallback(wgpu::CallbackMode::AllowSpontaneous,
-        [](const wgpu::Device&, wgpu::DeviceLostReason type, wgpu::StringView msg) { fprintf(stderr, "%s error: %s\n", ImGui_ImplWGPU_GetDeviceLostReasonName((WGPUDeviceLostReason)type), msg.data); }
-    );
-    device_desc.SetUncapturedErrorCallback(
-        [](const wgpu::Device&, wgpu::ErrorType type, wgpu::StringView msg) { fprintf(stderr, "%s error: %s\n", ImGui_ImplWGPU_GetErrorTypeName((WGPUErrorType)type), msg.data); }
-    );
+    wgpu::Instance instance = wgpuCreateInstance(nullptr);
 
-    wgpu::Device acquired_device;
-    auto onRequestDevice = [&](wgpu::RequestDeviceStatus status, wgpu::Device local_device, wgpu::StringView message)
-    {
-        if (status != wgpu::RequestDeviceStatus::Success)
-        {
-            printf("Failed to get an device: %s\n", message.data);
-            return;
-        }
-        acquired_device = std::move(local_device);
-    };
-
-    // Synchronously (wait until) get Device
-    wgpu::Future waitDeviceFunc { adapter.RequestDevice(&device_desc, wgpu::CallbackMode::WaitAnyOnly, onRequestDevice) };
-    wgpu::WaitStatus waitStatusDevice = instance.WaitAny(waitDeviceFunc, UINT64_MAX);
-    IM_ASSERT(acquired_device != nullptr && waitStatusDevice == wgpu::WaitStatus::Success && "Error on Device request");
-    return acquired_device.MoveToCHandle();
-}
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-static void handle_request_adapter(WGPURequestAdapterStatus status, WGPUAdapter adapter, WGPUStringView message, void* userdata1, void* userdata2)
-{
-    IM_UNUSED(userdata2);
-    if (status == WGPURequestAdapterStatus_Success)
-    {
-        WGPUAdapter* extAdapter = (WGPUAdapter*)userdata1;
-        *extAdapter = adapter;
-    }
-    else
-    {
-        printf("Request_adapter status=%#.8x message=%.*s\n", status, (int) message.length, message.data);
-    }
-}
-
-static void handle_request_device(WGPURequestDeviceStatus status, WGPUDevice device, WGPUStringView message, void* userdata1, void* userdata2)
-{
-    IM_UNUSED(userdata2);
-    if (status == WGPURequestDeviceStatus_Success)
-    {
-        WGPUDevice* extDevice = (WGPUDevice*)userdata1;
-        *extDevice = device;
-    }
-    else
-    {
-        printf("Request_device status=%#.8x message=%.*s\n", status, (int) message.length, message.data);
-    }
-}
-
-static WGPUAdapter RequestAdapter(WGPUInstance& instance)
-{
-    WGPURequestAdapterOptions adapter_options = {};
-
-    WGPUAdapter local_adapter = nullptr;
-    WGPURequestAdapterCallbackInfo adapterCallbackInfo = {};
-    adapterCallbackInfo.mode = WGPUCallbackMode_WaitAnyOnly;
-    adapterCallbackInfo.callback = handle_request_adapter;
-    adapterCallbackInfo.userdata1 = &local_adapter;
-
-    WGPUFuture future = wgpuInstanceRequestAdapter(instance, &adapter_options, adapterCallbackInfo);
-    WGPUFutureWaitInfo waitInfo = { future, false };
-    wgpuInstanceWaitAny(instance, 1, &waitInfo, ~0ull);
-    IM_ASSERT(local_adapter && "Error on Adapter request");
-    return local_adapter;
-}
-
-static WGPUDevice RequestDevice(WGPUInstance& instance, WGPUAdapter& adapter)
-{
-    WGPUDevice local_device = nullptr;
-    WGPURequestDeviceCallbackInfo deviceCallbackInfo = {};
-    deviceCallbackInfo.mode = WGPUCallbackMode_WaitAnyOnly;
-    deviceCallbackInfo.callback = handle_request_device;
-    deviceCallbackInfo.userdata1 = &local_device;
-    WGPUFuture future = wgpuAdapterRequestDevice(adapter, nullptr, deviceCallbackInfo);
-    WGPUFutureWaitInfo waitInfo = { future, false };
-    wgpuInstanceWaitAny(instance, 1, &waitInfo, ~0ull);
-    IM_ASSERT(local_device && "Error on Device request");
-    return local_device;
-}
-#endif // IMGUI_IMPL_WEBGPU_BACKEND_WGPU
-
-bool InitWGPU(GLFWwindow* window)
-{
-    WGPUTextureFormat preferred_fmt = WGPUTextureFormat_Undefined;  // acquired from SurfaceCapabilities
-
-    // Google DAWN backend: Adapter and Device acquisition, Surface creation
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
-    wgpu::InstanceDescriptor instance_desc = {};
-    static constexpr wgpu::InstanceFeatureName timedWaitAny = wgpu::InstanceFeatureName::TimedWaitAny;
-    instance_desc.requiredFeatureCount = 1;
-    instance_desc.requiredFeatures = &timedWaitAny;
-    wgpu::Instance instance = wgpu::CreateInstance(&instance_desc);
-
-    wgpu::Adapter adapter = RequestAdapter(instance);
-    ImGui_ImplWGPU_DebugPrintAdapterInfo(adapter.Get());
-
-    wgpu_device = RequestDevice(instance, adapter);
-
-    // Create the surface.
 #ifdef __EMSCRIPTEN__
-    wgpu::EmscriptenSurfaceSourceCanvasHTMLSelector canvas_desc = {};
-    canvas_desc.selector = "#canvas";
-
-    wgpu::SurfaceDescriptor surface_desc = {};
-    surface_desc.nextInChain = &canvas_desc;
-    wgpu_surface = instance.CreateSurface(&surface_desc).MoveToCHandle();
+    wgpu_device = emscripten_webgpu_get_device();
+    if (!wgpu_device)
+        return false;
 #else
-    wgpu_surface = CreateWGPUSurface(instance.Get(), window);
-#endif
-    if (!wgpu_surface)
+    WGPUAdapter adapter = RequestAdapter(instance.Get());
+    if (!adapter)
         return false;
+    wgpu_device = RequestDevice(adapter);
+#endif
+
+#ifdef __EMSCRIPTEN__
+    wgpu::SurfaceDescriptorFromCanvasHTMLSelector html_surface_desc = {};
+    html_surface_desc.selector = "#canvas";
+    wgpu::SurfaceDescriptor surface_desc = {};
+    surface_desc.nextInChain = &html_surface_desc;
+    wgpu::Surface surface = instance.CreateSurface(&surface_desc);
+
+    wgpu::Adapter adapter = {};
+    wgpu_preferred_fmt = (WGPUTextureFormat)surface.GetPreferredFormat(adapter);
+#else
+    wgpu::Surface surface = wgpu::glfw::CreateSurfaceForWindow(instance, window);
+    if (!surface)
+        return false;
+    wgpu_preferred_fmt = WGPUTextureFormat_BGRA8Unorm;
+#endif
 
-    // Moving Dawn objects into WGPU handles
     wgpu_instance = instance.MoveToCHandle();
+    wgpu_surface = surface.MoveToCHandle();
 
-    WGPUSurfaceCapabilities surface_capabilities = {};
-    wgpuSurfaceGetCapabilities(wgpu_surface, adapter.Get(), &surface_capabilities);
-
-    preferred_fmt = surface_capabilities.formats[0];
-
-    // WGPU backend: Adapter and Device acquisition, Surface creation
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-    WGPUInstanceDescriptor instanceDesc = {};
-    WGPUInstanceFeatureName timedWaitAny = WGPUInstanceFeatureName_TimedWaitAny;
-    instanceDesc.requiredFeatureCount = 1;
-    instanceDesc.requiredFeatures = &timedWaitAny;
-    wgpu_instance = wgpuCreateInstance(&instanceDesc);
-
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
-    wgpuSetLogCallback(
-        [](WGPULogLevel level, WGPUStringView msg, void* userdata) { fprintf(stderr, "%s: %.*s\n", ImGui_ImplWGPU_GetLogLevelName(level), (int)msg.length, msg.data); }, nullptr
-    );
-    wgpuSetLogLevel(WGPULogLevel_Warn);
-#endif
-
-    WGPUAdapter adapter = RequestAdapter(wgpu_instance);
-    ImGui_ImplWGPU_DebugPrintAdapterInfo(adapter);
-
-    wgpu_device = RequestDevice(wgpu_instance, adapter);
-
-    // Create the surface.
-    wgpu_surface = CreateWGPUSurface(wgpu_instance, window);
-    if (!wgpu_surface)
-        return false;
-
-    WGPUSurfaceCapabilities surface_capabilities = {};
-    wgpuSurfaceGetCapabilities(wgpu_surface, adapter, &surface_capabilities);
-
-    preferred_fmt = surface_capabilities.formats[0];
-#endif // IMGUI_IMPL_WEBGPU_BACKEND_WGPU
-
-    wgpu_surface_configuration.presentMode = WGPUPresentMode_Fifo;
-    wgpu_surface_configuration.alphaMode = WGPUCompositeAlphaMode_Auto;
-    wgpu_surface_configuration.usage = WGPUTextureUsage_RenderAttachment;
-    wgpu_surface_configuration.width = wgpu_surface_width;
-    wgpu_surface_configuration.height = wgpu_surface_height;
-    wgpu_surface_configuration.device = wgpu_device;
-    wgpu_surface_configuration.format = preferred_fmt;
-
-    wgpuSurfaceConfigure(wgpu_surface, &wgpu_surface_configuration);
-    wgpu_queue = wgpuDeviceGetQueue(wgpu_device);
+    wgpuDeviceSetUncapturedErrorCallback(wgpu_device, wgpu_error_callback, nullptr);
 
     return true;
 }
 
-// GLFW helper to create a WebGPU surface, used only in WGPU-Native. DAWN-Native already has a built-in function
-// As of today (2025/10) there is no "official" support in GLFW to create a surface for WebGPU backend
-// This stub uses "low level" GLFW calls to acquire information from a specific Window Manager.
-// Currently supported platforms: Windows / Linux (X11 and Wayland) / MacOS. Not necessary nor available with EMSCRIPTEN.
-#ifndef __EMSCRIPTEN__
-
-#if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
-#define GLFW_HAS_X11_OR_WAYLAND     1
-#else
-#define GLFW_HAS_X11_OR_WAYLAND     0
-#endif
-#ifdef _WIN32
-#undef APIENTRY
-#ifndef GLFW_EXPOSE_NATIVE_WIN32    // for glfwGetWin32Window()
-#define GLFW_EXPOSE_NATIVE_WIN32
-#endif
-#elif defined(__APPLE__)
-#ifndef GLFW_EXPOSE_NATIVE_COCOA    // for glfwGetCocoaWindow()
-#define GLFW_EXPOSE_NATIVE_COCOA
-#endif
-#elif GLFW_HAS_X11_OR_WAYLAND
-#ifndef GLFW_EXPOSE_NATIVE_X11      // for glfwGetX11Display(), glfwGetX11Window() on Freedesktop (Linux, BSD, etc.)
-#define GLFW_EXPOSE_NATIVE_X11
-#endif
-#ifndef GLFW_EXPOSE_NATIVE_WAYLAND
-#if defined(__has_include) && __has_include(<wayland-client.h>)
-#define GLFW_EXPOSE_NATIVE_WAYLAND
-#endif
-#endif
-#endif
-#include <GLFW/glfw3native.h>
-#undef Status                       // X11 headers are leaking this and also 'Success', 'Always', 'None', all used in DAWN api. Add #undef if necessary.
-
-WGPUSurface CreateWGPUSurface(const WGPUInstance& instance, GLFWwindow* window)
+static void CreateSwapChain(int width, int height)
 {
-    ImGui_ImplWGPU_CreateSurfaceInfo create_info = {};
-    create_info.Instance = instance;
-#if defined(GLFW_EXPOSE_NATIVE_COCOA)
-    {
-        create_info.System = "cocoa";
-        create_info.RawWindow = (void*)glfwGetCocoaWindow(window);
-        return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
-    }
-#elif defined(GLFW_EXPOSE_NATIVE_WAYLAND)
-    if (glfwGetPlatform() == GLFW_PLATFORM_WAYLAND)
-    {
-        create_info.System = "wayland";
-        create_info.RawDisplay = (void*)glfwGetWaylandDisplay();
-        create_info.RawSurface = (void*)glfwGetWaylandWindow(window);
-        return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
-    }
-#elif defined(GLFW_EXPOSE_NATIVE_X11)
-    if (glfwGetPlatform() == GLFW_PLATFORM_X11)
-    {
-        create_info.System = "x11";
-        create_info.RawWindow = (void*)glfwGetX11Window(window);
-        create_info.RawDisplay = (void*)glfwGetX11Display();
-        return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
-    }
-#elif defined(GLFW_EXPOSE_NATIVE_WIN32)
-    {
-        create_info.System = "win32";
-        create_info.RawWindow = (void*)glfwGetWin32Window(window);
-        create_info.RawInstance = (void*)::GetModuleHandle(NULL);
-        return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
-    }
-#else
-#error "Unsupported WebGPU native platform!"
-    return nullptr;
-#endif
+    if (wgpu_swap_chain)
+        wgpuSwapChainRelease(wgpu_swap_chain);
+    wgpu_swap_chain_width = width;
+    wgpu_swap_chain_height = height;
+    WGPUSwapChainDescriptor swap_chain_desc = {};
+    swap_chain_desc.usage = WGPUTextureUsage_RenderAttachment;
+    swap_chain_desc.format = wgpu_preferred_fmt;
+    swap_chain_desc.width = width;
+    swap_chain_desc.height = height;
+    swap_chain_desc.presentMode = WGPUPresentMode_Fifo;
+    wgpu_swap_chain = wgpuDeviceCreateSwapChain(wgpu_device, wgpu_surface, &swap_chain_desc);
 }
-#endif // #ifndef __EMSCRIPTEN__

examples/example_glfw_wgpu/web/index.html

@@ -0,0 +1,84 @@
+<!doctype html>
+<html lang="en-us">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"/>
+    <title>Dear ImGui Emscripten+GLFW+WebGPU example</title>
+    <style>
+        body { margin: 0; background-color: black }
+        .emscripten {
+            position: absolute;
+            top: 0px;
+            left: 0px;
+            margin: 0px;
+            border: 0;
+            width: 100%;
+            height: 100%;
+            overflow: hidden;
+            display: block;
+            image-rendering: optimizeSpeed;
+            image-rendering: -moz-crisp-edges;
+            image-rendering: -o-crisp-edges;
+            image-rendering: -webkit-optimize-contrast;
+            image-rendering: optimize-contrast;
+            image-rendering: crisp-edges;
+            image-rendering: pixelated;
+            -ms-interpolation-mode: nearest-neighbor;
+        }
+    </style>
+  </head>
+  <body>
+    <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
+    <script type='text/javascript'>
+      var Module;
+      (async () => {
+        Module = {
+          preRun: [],
+          postRun: [],
+          print: (function() {
+              return function(text) {
+                  text = Array.prototype.slice.call(arguments).join(' ');
+                  console.log(text);
+              };
+          })(),
+          printErr: function(text) {
+              text = Array.prototype.slice.call(arguments).join(' ');
+              console.error(text);
+          },
+          canvas: (function() {
+              var canvas = document.getElementById('canvas');
+              //canvas.addEventListener("webglcontextlost", function(e) { alert('FIXME: WebGL context lost, please reload the page'); e.preventDefault(); }, false);
+              return canvas;
+          })(),
+          setStatus: function(text) {
+              console.log("status: " + text);
+          },
+          monitorRunDependencies: function(left) {
+              // no run dependencies to log
+          }
+        };
+        window.onerror = function() {
+          console.log("onerror: " + event);
+        };
+
+      // Initialize the graphics adapter
+      {
+          if (!navigator.gpu) {
+            throw Error("WebGPU not supported.");
+          }
+
+          const adapter = await navigator.gpu.requestAdapter();
+          const device = await adapter.requestDevice();
+          Module.preinitializedWebGPUDevice = device;
+      }
+
+      {
+          const js = document.createElement('script');
+          js.async = true;
+          js.src = "index.js";
+          document.body.appendChild(js);
+      }
+      })();
+    </script>
+  </body>
+</html>

examples/example_glut_opengl2/example_glut_opengl2.vcxproj

@@ -28,27 +28,27 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">

examples/example_glut_opengl2/main.cpp

@@ -48,7 +48,7 @@ int main(int argc, char** argv)
     glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_GLUTMAINLOOP_RETURNS);
 #endif
     glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_MULTISAMPLE);
-    glutInitWindowSize(1280, 800);
+    glutInitWindowSize(1280, 720);
     glutCreateWindow("Dear ImGui GLUT+OpenGL2 Example");
 
     // Setup GLUT display function
@@ -61,6 +61,7 @@ int main(int argc, char** argv)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
 
     // Setup Dear ImGui style
     ImGui::StyleColorsDark();
@@ -79,21 +80,19 @@ int main(int argc, char** argv)
     ImGui_ImplGLUT_InstallFuncs();
 
     // Load Fonts
-    // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
-    //   This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
-    // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-    // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
     // - Read 'docs/FONTS.md' for more instructions and details.
-    // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
     // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-    //style.FontSizeBase = 20.0f;
-    //io.Fonts->AddFontDefaultVector();
-    //io.Fonts->AddFontDefaultBitmap();
-    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
-    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
-    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != nullptr);
 
     // Main loop

examples/example_null/example_null.vcxproj

@@ -1,179 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}</ProjectGuid>
-    <RootNamespace>example_win32_directx11</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <OutDir>$(ProjectDir)$(Configuration)\</OutDir>
-    <IntDir>$(ProjectDir)$(Configuration)\</IntDir>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <OutDir>$(ProjectDir)$(Configuration)\</OutDir>
-    <IntDir>$(ProjectDir)$(Configuration)\</IntDir>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <OutDir>$(ProjectDir)$(Configuration)\</OutDir>
-    <IntDir>$(ProjectDir)$(Configuration)\</IntDir>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <OutDir>$(ProjectDir)$(Configuration)\</OutDir>
-    <IntDir>$(ProjectDir)$(Configuration)\</IntDir>
-  </PropertyGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
-      <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-    </ClCompile>
-    <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <SubSystem>Console</SubSystem>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
-      <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-    </ClCompile>
-    <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x64;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <SubSystem>Console</SubSystem>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
-      <BufferSecurityCheck>false</BufferSecurityCheck>
-      <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-    </ClCompile>
-    <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <SubSystem>Console</SubSystem>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
-      <BufferSecurityCheck>false</BufferSecurityCheck>
-      <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-    </ClCompile>
-    <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x64;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <SubSystem>Console</SubSystem>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemGroup>
-    <ClInclude Include="..\..\backends\imgui_impl_null.h" />
-    <ClInclude Include="..\..\imconfig.h" />
-    <ClInclude Include="..\..\imgui.h" />
-    <ClInclude Include="..\..\imgui_internal.h" />
-  </ItemGroup>
-  <ItemGroup>
-    <ClCompile Include="..\..\backends\imgui_impl_null.cpp">
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="..\..\imgui.cpp" />
-    <ClCompile Include="..\..\imgui_demo.cpp" />
-    <ClCompile Include="..\..\imgui_draw.cpp" />
-    <ClCompile Include="..\..\imgui_tables.cpp" />
-    <ClCompile Include="..\..\imgui_widgets.cpp" />
-    <ClCompile Include="main.cpp" />
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="..\..\misc\debuggers\imgui.natstepfilter" />
-    <None Include="..\..\misc\debuggers\imgui.natvis" />
-    <None Include="..\README.txt" />
-  </ItemGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets">
-  </ImportGroup>
-</Project>

examples/example_null/example_null.vcxproj.filters

@@ -1,57 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup>
-    <Filter Include="imgui">
-      <UniqueIdentifier>{0587d7a3-f2ce-4d56-b84f-a0005d3bfce6}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="sources">
-      <UniqueIdentifier>{08e36723-ce4f-4cff-9662-c40801cf1acf}</UniqueIdentifier>
-    </Filter>
-  </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="..\..\imconfig.h">
-      <Filter>imgui</Filter>
-    </ClInclude>
-    <ClInclude Include="..\..\imgui.h">
-      <Filter>imgui</Filter>
-    </ClInclude>
-    <ClInclude Include="..\..\imgui_internal.h">
-      <Filter>imgui</Filter>
-    </ClInclude>
-    <ClInclude Include="..\..\backends\imgui_impl_null.h">
-      <Filter>sources</Filter>
-    </ClInclude>
-  </ItemGroup>
-  <ItemGroup>
-    <ClCompile Include="..\..\imgui.cpp">
-      <Filter>imgui</Filter>
-    </ClCompile>
-    <ClCompile Include="main.cpp">
-      <Filter>sources</Filter>
-    </ClCompile>
-    <ClCompile Include="..\..\imgui_demo.cpp">
-      <Filter>imgui</Filter>
-    </ClCompile>
-    <ClCompile Include="..\..\imgui_draw.cpp">
-      <Filter>imgui</Filter>
-    </ClCompile>
-    <ClCompile Include="..\..\imgui_tables.cpp">
-      <Filter>imgui</Filter>
-    </ClCompile>
-    <ClCompile Include="..\..\imgui_widgets.cpp">
-      <Filter>imgui</Filter>
-    </ClCompile>
-    <ClCompile Include="..\..\backends\imgui_impl_null.cpp">
-      <Filter>sources</Filter>
-    </ClCompile>
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="..\README.txt" />
-    <None Include="..\..\misc\debuggers\imgui.natvis">
-      <Filter>imgui</Filter>
-    </None>
-    <None Include="..\..\misc\debuggers\imgui.natstepfilter">
-      <Filter>imgui</Filter>
-    </None>
-  </ItemGroup>
-</Project>

examples/example_null/main.cpp

@@ -4,26 +4,22 @@
 #include "imgui.h"
 #include <stdio.h>
 
-// For imgui_impl_null: use relative filename + embed implementation directly by including the .cpp file.
-// This is to simplify casual building of this example from all sorts of test scripts.
-#include "../../backends/imgui_impl_null.h"
-#include "../../backends/imgui_impl_null.cpp"
-
 int main(int, char**)
 {
     IMGUI_CHECKVERSION();
-
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO();
 
-    ImGui_ImplNullPlatform_Init();
-    ImGui_ImplNullRender_Init();
+    // Build atlas
+    unsigned char* tex_pixels = nullptr;
+    int tex_w, tex_h;
+    io.Fonts->GetTexDataAsRGBA32(&tex_pixels, &tex_w, &tex_h);
 
     for (int n = 0; n < 20; n++)
     {
         printf("NewFrame() %d\n", n);
-        ImGui_ImplNullPlatform_NewFrame();
-        ImGui_ImplNullRender_NewFrame();
+        io.DisplaySize = ImVec2(1920, 1080);
+        io.DeltaTime = 1.0f / 60.0f;
         ImGui::NewFrame();
 
         static float f = 0.0f;
@@ -36,8 +32,6 @@ int main(int, char**)
     }
 
     printf("DestroyContext()\n");
-    ImGui_ImplNullRender_Shutdown();
-    ImGui_ImplNullPlatform_Shutdown();
     ImGui::DestroyContext();
     return 0;
 }

examples/example_sdl2_directx11/example_sdl2_directx11.vcxproj

@@ -29,27 +29,27 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">