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Backends: DX10, DX11, DX12, Metal/4, OpenGL2/3, SDLGPU3, Vulkan: round framebuffer dimensions instead of truncating. (#9538, #9515, #8628)

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ocornut
2026-09-07 12:47:03 +02:00
parent 080319c4ce
commit 4898533613
11 changed files with 36 additions and 28 deletions
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5
backends/imgui_impl_dx10.cpp
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@@ -16,6 +16,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 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.
@@ -106,8 +107,8 @@ static void ImGui_ImplDX10_SetupRenderState(ImDrawData* draw_data, ID3D10Device*
// 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);
vp.Width = (UINT)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
vp.Height = (UINT)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = vp.TopLeftY = 0;

4
backends/imgui_impl_dx11.cpp
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@@ -110,8 +110,8 @@ static void ImGui_ImplDX11_SetupRenderState(const ImDrawData* draw_data, ID3D11D
// 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;
vp.Width = (float)(int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
vp.Height = (float)(int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = vp.TopLeftY = 0;

5
backends/imgui_impl_dx12.cpp
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@@ -20,6 +20,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 2026-08-05: DirectX12: *BREAKING CHANGE* Removed support for legacy `ImGui_ImplDX12_Init()` signature obsoleted in 1.91.6 (2024-11-15) because it needed to forcefully disable support for ImGuiBackendFlags_RendererHasTextures. (#9487)
// 2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
// 2025-10-11: DirectX12: Reuse texture upload buffer and grow it only when necessary. (#9002)
@@ -183,8 +184,8 @@ static void ImGui_ImplDX12_SetupRenderState(ImDrawData* draw_data, ID3D12Graphic
// Setup viewport
D3D12_VIEWPORT vp = {};
vp.Width = draw_data->DisplaySize.x * draw_data->FramebufferScale.x;
vp.Height = draw_data->DisplaySize.y * draw_data->FramebufferScale.y;
vp.Width = (float)(int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
vp.Height = (float)(int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = vp.TopLeftY = 0.0f;

9
backends/imgui_impl_metal.mm
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@@ -16,6 +16,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 2026-04-28: Added support for standard draw callbacks (in platform_io): DrawCallback_SetSamplerLinear and DrawCallback_SetSamplerNearest. (#9378, #9381)
// 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)
@@ -163,8 +164,8 @@ 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)(int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f),
.height = (double)(int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f),
.znear = 0.0,
.zfar = 1.0
};
@@ -203,8 +204,8 @@ void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer>
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);
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
if (fb_width <= 0 || fb_height <= 0 || draw_data->CmdLists.Size == 0)
return;

9
backends/imgui_impl_metal4.mm
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@@ -19,6 +19,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 2026-07-07: Metal 4: Added metal-cpp support. (#9461)
// 2026-07-02: Metal 4: Added new Metal 4 backend implementation. (#9458)
@@ -162,8 +163,8 @@ static void ImGui_ImplMetal4_SetupRenderState(ImDrawData* draw_data, id<MTL4Comm
{
.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)(int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f),
.height = (double)(int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f),
.znear = 0.0,
.zfar = 1.0
};
@@ -203,8 +204,8 @@ void ImGui_ImplMetal4_RenderDrawData(ImDrawData* draw_data, id<MTL4CommandBuffer
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);
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
if (fb_width <= 0 || fb_height <= 0 || draw_data->CmdLists.Size == 0)
return;

5
backends/imgui_impl_opengl2.cpp
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@@ -26,6 +26,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 2026-07-15: OpenGL: Backup and restore GL_UNPACK_ROW_LENGTH and GL_UNPACK_ALIGNMENT in UpdateTexture() to avoid corrupting caller GL state. (#8802, #9473)
// 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)
@@ -168,8 +169,8 @@ 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);
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
if (fb_width == 0 || fb_height == 0)
return;

5
backends/imgui_impl_opengl3.cpp
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@@ -23,6 +23,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 2026-07-15: OpenGL: Backup and restore GL_UNPACK_ROW_LENGTH and GL_UNPACK_ALIGNMENT in UpdateTexture() to avoid corrupting caller GL state. (#8802, #9473)
// 2026-06-17: OpenGL: Expose selected render state in ImGui_ImplOpenGL3_RenderState, Allowing to dynamically select between use of glBindSampler() and glTexParameter(). You can access in 'void* platform_io.Renderer_RenderState' during rendering.
// 2026-06-03: OpenGL: GLSL version detection assume GLSL 410 when GL context is 4.1. Fixes an issue running on macOS with Wine. (#9427, #6577)
@@ -455,8 +456,8 @@ static void ImGui_ImplOpenGL3_DrawCallback_SetSamplerNearest(const ImDrawList*,
void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
{
// 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);
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
if (fb_width <= 0 || fb_height <= 0)
return;

9
backends/imgui_impl_sdlgpu3.cpp
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@@ -22,6 +22,7 @@
// 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
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 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)
@@ -163,8 +164,8 @@ static void CreateOrResizeBuffers(SDL_GPUBuffer** buffer, SDL_GPUTransferBuffer*
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);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
if (fb_width <= 0 || fb_height <= 0 || draw_data->TotalVtxCount <= 0)
return;
@@ -229,8 +230,8 @@ static void ImGui_ImplSDLGPU3_DrawCallback_SetSamplerNearest(const ImDrawList*,
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)
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
if (fb_width <= 0 || fb_height <= 0)
return;

5
backends/imgui_impl_vulkan.cpp
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@@ -27,6 +27,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-09-07: Round framebuffer dimensions to the nearest integer instead of truncating them. (#9538, 9515, #8628)
// 2026-09-03: Added for support for multiple Vulkan contexts with custom loaders. (#6616)
// 2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
// 2026-04-22: *BREAKING CHANGE* redesigned to use separate ImageView + Sampler instead of Combined Image Sampler. This change allows us to facilitate changing samplers, in line with other backends.
@@ -587,8 +588,8 @@ void ImGui_ImplVulkan_DrawCallback_SetSamplerCustom(const ImDrawList*, const ImD
void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer command_buffer, VkPipeline pipeline)
{
// 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);
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
if (fb_width <= 0 || fb_height <= 0)
return;

4
examples/example_apple_opengl2/main.mm
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@@ -131,8 +131,8 @@
ImDrawData* draw_data = ImGui::GetDrawData();
[[self openGLContext] makeCurrentContext];
GLsizei width = (GLsizei)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
GLsizei height = (GLsizei)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
GLsizei width = (GLsizei)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
GLsizei height = (GLsizei)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
glViewport(0, 0, width, height);
glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);

4
examples/example_apple_opengl3/main.mm
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@@ -131,8 +131,8 @@
ImDrawData* draw_data = ImGui::GetDrawData();
[[self openGLContext] makeCurrentContext];
GLsizei width = (GLsizei)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
GLsizei height = (GLsizei)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
GLsizei width = (GLsizei)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x + 0.5f);
GLsizei height = (GLsizei)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y + 0.5f);
glViewport(0, 0, width, height);
glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);