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Backends: SDLRenderer2/3: expose selected state in ImGui_ImplXXXX_RenderState structures during render loop. (#6969, #5834, #7468, #3590 + #7616)

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ocornut
2024-10-09 16:39:28 +02:00
parent 9fbc313459
commit a0b811dd37
5 changed files with 44 additions and 4 deletions
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13
backends/imgui_impl_sdlrenderer2.cpp
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@@ -10,6 +10,7 @@
// Implemented features:
// [X] Renderer: User texture binding. Use 'SDL_Texture*' as ImTextureID. Read the FAQ about ImTextureID!
// [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices.
// [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
// 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.
@@ -20,6 +21,7 @@
// - Introduction, links and more at the top of imgui.cpp
// CHANGELOG
// 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.
// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
@@ -140,12 +142,20 @@ void ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
SDL_RenderGetViewport(renderer, &old.Viewport);
SDL_RenderGetClipRect(renderer, &old.ClipRect);
// Setup desired state
ImGui_ImplSDLRenderer2_SetupRenderState(renderer);
// Setup render state structure (for callbacks and custom texture bindings)
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
ImGui_ImplSDLRenderer2_RenderState render_state;
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;
// Render command lists
ImGui_ImplSDLRenderer2_SetupRenderState(renderer);
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* draw_list = draw_data->CmdLists[n];
@@ -198,6 +208,7 @@ void ImGui_ImplSDLRenderer2_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
}
}
}
platform_io.Renderer_RenderState = NULL;
// Restore modified SDL_Renderer state
SDL_RenderSetViewport(renderer, &old.Viewport);