wr = img.comps[compno].w;
wrr =
int_ceildivpow2(img.comps[compno].w, img.comps[compno].factor);
h = int_ceildiv(img.y1 - img.y0, img.comps[compno].dy);
wr = img.comps[compno].w;
wrr =
int_ceildivpow2(img.comps[compno].w, img.comps[compno].factor);
h = int_ceildiv(img.y1 - img.y0, img.comps[compno].dy);