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Backends: SDLRenderer3: query newly added SDL_RenderViewportSet() to not restore a wrong viewport if none was initially set.

Browse source 
https://github.com/libsdl-org/SDL/issues/9029
This commit is contained in:
ocornut 2024-02-12 14:57:39 +01:00
parent 915c6393ad
commit 2af01baffd
2 changed files with 8 additions and 5 deletions
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9
backends/imgui_impl_sdlrenderer3.cpp
View file

@ -20,6 +20,7 @@
// - Introduction, links and more at the top of imgui.cpp
// CHANGELOG
// 2024-02-12: Amend to query SDL_RenderViewportSet() and restore viewport accordingly.
// 2023-05-30: Initial version.
#include "imgui.h"
@ -129,10 +130,12 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data)
struct BackupSDLRendererState
{
SDL_Rect Viewport;
bool ViewportEnabled;
bool ClipEnabled;
SDL_Rect ClipRect;
};
BackupSDLRendererState old = {};
old.ViewportEnabled = SDL_RenderViewportSet(bd->SDLRenderer) == SDL_TRUE;
old.ClipEnabled = SDL_RenderClipEnabled(bd->SDLRenderer) == SDL_TRUE;
SDL_GetRenderViewport(bd->SDLRenderer, &old.Viewport);
SDL_GetRenderClipRect(bd->SDLRenderer, &old.ClipRect);
@ -178,11 +181,7 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data)
const float* xy = (const float*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, pos));
const float* uv = (const float*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, uv));
#if SDL_VERSION_ATLEAST(2,0,19)
const SDL_Color* color = (const SDL_Color*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, col)); // SDL 2.0.19+
#else
const int* color = (const int*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, col)); // SDL 2.0.17 and 2.0.18
#endif
// Bind texture, Draw
SDL_Texture* tex = (SDL_Texture*)pcmd->GetTexID();
@ -197,7 +196,7 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data)
}
// Restore modified SDL_Renderer state
SDL_SetRenderViewport(bd->SDLRenderer, &old.Viewport);
SDL_SetRenderViewport(bd->SDLRenderer, old.ViewportEnabled ? &old.Viewport : nullptr);
SDL_SetRenderClipRect(bd->SDLRenderer, old.ClipEnabled ? &old.ClipRect : nullptr);
}

4
docs/CHANGELOG.txt
View file

@ -41,6 +41,10 @@ HOW TO UPDATE?
Other changes:
- Backends: SDLRenderer3: query newly added SDL_RenderViewportSet() to not restore
a wrong viewport if none was initially set.
-----------------------------------------------------------------------
VERSION 1.90.2 (Released 2024-01-09)
-----------------------------------------------------------------------