dest = l->surface.RrPixel_data;
for (i = 0; i < h; i++, source += sw, dest += w) {
memcpy(dest, source, w * sizeof(RrPixel32));
}
dest = l->surface.RrPixel_data;
for (i = 0; i < h; i++, source += sw, dest += w) {
memcpy(dest, source, w * sizeof(RrPixel32));
}