if (new_surface == NULL)
Error(ERR_EXIT, "SDL_ConvertSurface() failed: %s", SDL_GetError());
+ // workaround for a bug in SDL 2.0.12 (which does not convert the color key)
+ if (SDLHasColorKey(surface) && !SDLHasColorKey(new_surface))
+ SDL_SetColorKey(new_surface, SET_TRANSPARENT_PIXEL,
+ SDLGetColorKey(surface));
+
return new_surface;
}