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Backends: SDL: Added SDL_Renderer* parameter to ImGui_ImplSDL2_InitForSDLRenderer(). Use SDL_GetRendererOutputSize() instead of SDL_GL_GetDrawableSize() when bound to a SDL_Renderer. (#4927)
This is (kind of) an OpenGL-only function, which should be avoided when SDL2 isn't using OpenGL. The only alternative that is recommended is SDL_GetRendererOutputSize, which limits this fix to the SDL_Renderer backend. Still, I think it's better than nothing. I say that SDL_GL_GetDrawableSize is "kind of" OpenGL-only because it does technically work even when SDL2 isn't using OpenGL. It's just that it becomes a shim to SDL_GetWindowSize, which is not suitable for high-DPI usage because it reflects the size of the window in screen coordinates, not actual pixels, so it really should be avoided when not using OpenGL.
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@ -19,13 +19,14 @@
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#include "imgui.h" // IMGUI_IMPL_API
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struct SDL_Window;
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struct SDL_Renderer;
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typedef union SDL_Event SDL_Event;
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IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context);
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IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window);
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IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForD3D(SDL_Window* window);
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IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForMetal(SDL_Window* window);
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IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window);
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IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer);
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IMGUI_IMPL_API void ImGui_ImplSDL2_Shutdown();
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IMGUI_IMPL_API void ImGui_ImplSDL2_NewFrame();
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IMGUI_IMPL_API bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event);
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