void attempt_four(int dim, pixel *src, pixel *dst) {
if (dim < 256)
return naive_rotate(dim, src, dst);
int tile_num = 256;
int tile_size = dim/tile_num;
int i, j, x, y;
for (x=0; x<tile_num; x++){
int baseI = x*tile_size;
for (y=0; y<tile_num; y++){
int baseJ = y*tile_size;
for (i = 0; i < tile_size; i++)
for (j = 0; j < tile_size; j++)
dst[RIDX(dim-1-baseJ-j, baseI+i, dim)] = src[RIDX(baseI+i, baseJ+j, dim)];
}
}
}
void rotate(int dim, pixel *src, pixel *dst)
{
naive_rotate(dim, src, dst);
}
