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Fixed software renderer 8-bit scaling and rotation (thanks @jroatch!)

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Fixes https://github.com/libsdl-org/SDL/issues/14422
This commit is contained in:
Sam Lantinga
2025-11-08 08:46:58 -08:00
parent 6a01d6e7d3
commit 7553d5892e
1 changed files with 4 additions and 1 deletions
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5
src/render/software/SDL_render_sw.c
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@@ -400,6 +400,9 @@ static bool SW_RenderCopyEx(SDL_Renderer *renderer, SDL_Surface *surface, SDL_Te
} }
return false; return false;
} }
if (src->palette) {
SDL_SetSurfacePalette(src_clone, src->palette);
}
SDL_GetSurfaceBlendMode(src, &blendmode); SDL_GetSurfaceBlendMode(src, &blendmode);
SDL_GetSurfaceAlphaMod(src, &alphaMod); SDL_GetSurfaceAlphaMod(src, &alphaMod);
@@ -880,7 +883,7 @@ static bool SW_RunCommandQueue(SDL_Renderer *renderer, SDL_RenderCommand *cmd, v
// Prevent to do scaling + clipping on viewport boundaries as it may lose proportion // Prevent to do scaling + clipping on viewport boundaries as it may lose proportion
if (dstrect->x < 0 || dstrect->y < 0 || dstrect->x + dstrect->w > surface->w || dstrect->y + dstrect->h > surface->h) { if (dstrect->x < 0 || dstrect->y < 0 || dstrect->x + dstrect->w > surface->w || dstrect->y + dstrect->h > surface->h) {
SDL_Surface *tmp = SDL_CreateSurface(dstrect->w, dstrect->h, src->format); SDL_Surface *tmp = SDL_CreateSurface(dstrect->w, dstrect->h, surface->format);
// Scale to an intermediate surface, then blit // Scale to an intermediate surface, then blit
if (tmp) { if (tmp) {
SDL_Rect r; SDL_Rect r;