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Backends, Examples: WGPU: wip refactor. (8381)
Rebased and squashed 47 commits. - ImGui WebGPU examples: removed swap-chain in favor of surfaceConfigure (8191) - New SDL2 WGPU example - Code optimization: removed the redundancies of assignment - Changes: ImGui code style - Lambdas RequestAdapter and RequestDevice callbacks declarated as signature - Validation Layer callbacks moved from lambdas to standard functions - Same changes of GLFW example: ImGui code style - Lambdas RequestAdapter and RequestDevice callbacks declarated as signature - Validation Layer callbacks moved from lambdas to standard functions - Scrollbars inhibition - Use of new direct CreateDevice function (w/o callback), added release of all resources used (not present in original example) - If the O.S. is Linux/Unix check if Wayland is the current active session and set DAWN_USE_WAYLAND=ON option (otherwise is always OFF) - example_glfw_wgpu: removed all workarounds - example_sdl2_wgpu: same style and functionality as GLFW example - sdl2wgpu tool to acquire surfaceDescriptor via SDL_syswm and to pass to wgpuInstanceCreateSurface to create WGPU Surface - css style to avoid the scrollbar - added `chek_surface_texture_status` function to check the `WGPUSurfaceTexture .status` and recreate the `Surface` in case of "not optimal" (bad) status. - Changed comment reference to `emwgpudawn` an EMSCRIPTEN WGPU binding maintained by Google - Adaptation to the last Google DAWN commit (1411699ba) Adaptation to the last EMSCRIPTEN 4.0.10, using new "--use-port=emdawnwebgpu" compiler/linker flag - Support for EMSCRIPTEN >= 4.0.10 (using "--use-port=emdawnwebgpu") and NEW support for WGPU-Native - Finalized the support of WGPU-Native for MacOS and minimal code adjustment - WebGPU examples - DAWN / WGPU native and EMSCRIPTEN - for GLFW/SDL2/SDL3 frameworks - "index.html" no more necessary (now the common one is used), "sdl2wgpu.cpp" It has been moved and renamed (sdl2_wgpu.c), "sdl2wgpu.h" no more necessary - added procedure for using CMake - added procedure for using CMake - Updated example_sdl3_wgpu build procedure for EMSCRIPTEN - WGPU+GLFW: Helper to create a WebGPU surface for Native application. Used only with WGPU-Native SDK: DAWN-Native already has a built-in function - WGPU+SDL2: helper to create a WebGPU surface (exclusively!) for Native/Desktop applications and available only together with WebGPU/WGPU backend - WGPU+SDL3: helper to create a WebGPU surface (exclusively!) for Native/Desktop applications and available only together with WebGPU/WGPU backend - WebGPU Helper functions and differentiation between the 4 compilation methods (via defines): Google DAWN (Native/Emscripten) / WGPU (Native/EMscripten) - example_glfw_wgpu: ImGui_ImplGLFW_CreateWGPUSurface_Helper (new helper function in imgui_impl_glfw backend), check status and error callback functions in imgui_impl_wgpu backend - example_sdl2_wgpu: ImGui_ImplSDL2_CreateWGPUSurface_Helper (new helper function in imgui_impl_sdl2 backend), check status and error callback functions in imgui_impl_wgpu backend - example_sdl3_wgpu: ImGui_ImplSDL3_CreateWGPUSurface_Helper (new helper function in imgui_impl_sdl3 backend), check status and error callback functions in imgui_impl_wgpu backend - Functions ImGui_ImplXXXX_CreateWGPUSurface_Helper were inserted into imgui_impl_xxxx (xxxx = GLFW / SDL2 / SDL3), and initialization has been integrated into every example: no more necessary, removed
This commit is contained in:
BrutPitt
@@ -899,6 +899,92 @@ void ImGui_ImplSDL2_NewFrame()
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ImGui_ImplSDL2_UpdateGamepads();
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}
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// SDL2 helper to create a WebGPU surface (exclusively!) for Native/Desktop applications: available only together with WebGPU/WGPU backend
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// At current date (jun/2025) there is no "official" support in SDL2 to create a surface for WebGPU backend
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// This stub uses "low level" SDL2 calls to acquire information from a specific Window Manager.
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// Currently supported platforms: Windows / Linux (X11 and Wayland) / MacOS
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// Not necessary/available with EMSCRIPTEN
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#if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) && !defined(__EMSCRIPTEN__)
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#ifdef SDL_VIDEO_DRIVER_COCOA
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// MacOS specific: is necessary to compile with "-x objective-c++" flags
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// (e.g. using cmake: set_source_files_properties(${IMGUI_DIR}/backends/imgui_impl_sdl2.cpp PROPERTIES COMPILE_FLAGS "-x objective-c++") )
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#include <Cocoa/Cocoa.h>
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#include <QuartzCore/CAMetalLayer.h>
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#endif
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WGPUSurface ImGui_ImplSDL2_CreateWGPUSurface_Helper(WGPUInstance instance, SDL_Window* window)
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{
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WGPUSurfaceDescriptor surfaceDescriptor = {};
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WGPUChainedStruct chainedStruct = {};
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SDL_SysWMinfo sysWMInfo;
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SDL_VERSION(&sysWMInfo.version);
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SDL_GetWindowWMInfo(window, &sysWMInfo);
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WGPUSurface surface = {};
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#if defined(SDL_VIDEO_DRIVER_WAYLAND) || defined(SDL_VIDEO_DRIVER_X11)
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const char *vidDrv = SDL_GetHint(SDL_HINT_VIDEODRIVER);
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if(!vidDrv) return NULL;
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if(tolower(vidDrv[0])=='w' && tolower(vidDrv[1])=='a' && tolower(vidDrv[2])=='y' &&
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tolower(vidDrv[3])=='l' && tolower(vidDrv[4])=='a' && tolower(vidDrv[5])=='n' && tolower(vidDrv[6])=='d') { // wayland
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chainedStruct.sType = WGPUSType_SurfaceSourceWaylandSurface;
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WGPUSurfaceSourceWaylandSurface surfaceWayland = {};
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surfaceWayland.chain = chainedStruct;
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surfaceWayland.display = sysWMInfo.info.wl.display;
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surfaceWayland.surface = sysWMInfo.info.wl.surface;
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surfaceDescriptor.nextInChain = &surfaceWayland.chain;
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surface = wgpuInstanceCreateSurface(instance, &surfaceDescriptor);
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} else { // x11
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chainedStruct.sType = WGPUSType_SurfaceSourceXlibWindow;
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WGPUSurfaceSourceXlibWindow surfaceXlib = {};
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surfaceXlib.chain = chainedStruct;
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surfaceXlib.display = sysWMInfo.info.x11.display;
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surfaceXlib.window = sysWMInfo.info.x11.window;
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surfaceDescriptor.nextInChain = &surfaceXlib.chain;
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surface = wgpuInstanceCreateSurface(instance, &surfaceDescriptor);
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}
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#elif defined(SDL_VIDEO_DRIVER_WINDOWS)
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{
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chainedStruct.sType = WGPUSType_SurfaceSourceWindowsHWND;
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WGPUSurfaceSourceWindowsHWND surfaceHWND = {};
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surfaceHWND.chain = chainedStruct;
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surfaceHWND.hinstance = sysWMInfo.info.win.hinstance;
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surfaceHWND.hwnd = sysWMInfo.info.win.window;
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surfaceDescriptor.nextInChain = &surfaceHWND.chain;
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surface = wgpuInstanceCreateSurface(instance, &surfaceDescriptor);
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}
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#elif defined(SDL_VIDEO_DRIVER_COCOA)
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{
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id metal_layer = [CAMetalLayer layer];
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NSWindow *ns_window = sysWMInfo.info.cocoa.window;
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[ns_window.contentView setWantsLayer:YES];
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[ns_window.contentView setLayer:metal_layer];
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chainedStruct.sType = WGPUSType_SurfaceSourceMetalLayer;
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WGPUSurfaceSourceMetalLayer surfaceMetal = {};
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surfaceMetal.chain = chainedStruct;
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surfaceMetal.layer = metal_layer;
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surfaceDescriptor.nextInChain = &surfaceMetal.chain;
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surface = wgpuInstanceCreateSurface(instance, &surfaceDescriptor);
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}
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#else
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#error "Unsupported SDL2/WebGPU Backend"
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#endif
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return surface;
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}
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#endif //defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) && !defined(__EMSCRIPTEN__)
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//-----------------------------------------------------------------------------
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#if defined(__clang__)
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