SDL_InvalidateMap

SDL_pixels.c

void
SDL_InvalidateMap(SDL_BlitMap * map)
{
    if (!map) {
        return;
    }
    if (map->dst) {
        /* Release our reference to the surface - see the note below */
        if (--map->dst->refcount <= 0) {
            SDL_FreeSurface(map->dst);
        }
    }
    map->dst = NULL;
    map->src_palette_version = 0;
    map->dst_palette_version = 0;
    SDL_free(map->info.table);
    map->info.table = NULL;
}