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Check return value of SDL_small_alloc()

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Fixes https://github.com/libsdl-org/SDL/issues/8959
This commit is contained in:
Sam Lantinga 2024-10-13 13:17:03 -07:00
parent d7be7fc168
commit 1cc85c912b
9 changed files with 22 additions and 55 deletions
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15
src/render/opengl/SDL_render_gl.c
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@ -1497,20 +1497,7 @@ static SDL_Surface *GL_RenderReadPixels(SDL_Renderer *renderer, const SDL_Rect *
// Flip the rows to be top-down if necessary
if (!renderer->target) {
bool isstack;
int length = rect->w * SDL_BYTESPERPIXEL(format);
Uint8 *src = (Uint8 *)surface->pixels + (rect->h - 1) * surface->pitch;
Uint8 *dst = (Uint8 *)surface->pixels;
Uint8 *tmp = SDL_small_alloc(Uint8, length, &isstack);
int rows = rect->h / 2;
while (rows--) {
SDL_memcpy(tmp, dst, length);
SDL_memcpy(dst, src, length);
SDL_memcpy(src, tmp, length);
dst += surface->pitch;
src -= surface->pitch;
}
SDL_small_free(tmp, isstack);
SDL_FlipSurface(surface, SDL_FLIP_VERTICAL);
}
return surface;
}