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Make sure native textures have the same channel precision if possible

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Fixes https://github.com/libsdl-org/SDL/issues/14882
This commit is contained in:
Sam Lantinga
2026-02-06 09:50:18 -08:00
parent ef41e0a0f0
commit fdfcfc0566
1 changed files with 4 additions and 0 deletions
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4
src/render/SDL_render.c
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@@ -1469,10 +1469,12 @@ static SDL_PixelFormat GetClosestSupportedFormat(SDL_Renderer *renderer, SDL_Pix
} else { } else {
bool hasAlpha = SDL_ISPIXELFORMAT_ALPHA(format); bool hasAlpha = SDL_ISPIXELFORMAT_ALPHA(format);
bool isIndexed = SDL_ISPIXELFORMAT_INDEXED(format); bool isIndexed = SDL_ISPIXELFORMAT_INDEXED(format);
int size = SDL_BYTESPERPIXEL(format);
// We just want to match the first format that has the same channels // We just want to match the first format that has the same channels
for (i = 0; i < renderer->num_texture_formats; ++i) { for (i = 0; i < renderer->num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_FOURCC(renderer->texture_formats[i]) && if (!SDL_ISPIXELFORMAT_FOURCC(renderer->texture_formats[i]) &&
SDL_BYTESPERPIXEL(renderer->texture_formats[i]) == size &&
SDL_ISPIXELFORMAT_ALPHA(renderer->texture_formats[i]) == hasAlpha && SDL_ISPIXELFORMAT_ALPHA(renderer->texture_formats[i]) == hasAlpha &&
SDL_ISPIXELFORMAT_INDEXED(renderer->texture_formats[i]) == isIndexed) { SDL_ISPIXELFORMAT_INDEXED(renderer->texture_formats[i]) == isIndexed) {
return renderer->texture_formats[i]; return renderer->texture_formats[i];
@@ -1846,9 +1848,11 @@ SDL_Texture *SDL_CreateTextureFromSurface(SDL_Renderer *renderer, SDL_Surface *s
// Indexed formats don't support the transparency needed for color-keyed surfaces // Indexed formats don't support the transparency needed for color-keyed surfaces
bool preferIndexed = SDL_ISPIXELFORMAT_INDEXED(surface->format) && !needAlpha; bool preferIndexed = SDL_ISPIXELFORMAT_INDEXED(surface->format) && !needAlpha;
int size = SDL_BYTESPERPIXEL(format);
for (i = 0; i < renderer->num_texture_formats; ++i) { for (i = 0; i < renderer->num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_FOURCC(renderer->texture_formats[i]) && if (!SDL_ISPIXELFORMAT_FOURCC(renderer->texture_formats[i]) &&
SDL_BYTESPERPIXEL(renderer->texture_formats[i]) == size &&
SDL_ISPIXELFORMAT_ALPHA(renderer->texture_formats[i]) == needAlpha && SDL_ISPIXELFORMAT_ALPHA(renderer->texture_formats[i]) == needAlpha &&
SDL_ISPIXELFORMAT_INDEXED(renderer->texture_formats[i]) == preferIndexed) { SDL_ISPIXELFORMAT_INDEXED(renderer->texture_formats[i]) == preferIndexed) {
format = renderer->texture_formats[i]; format = renderer->texture_formats[i];