if (mx == 0) && (my == 0) {
let dst = &mut dst[doff..];
for (out, src) in dst.chunks_mut(dstride).take(size).zip(src.chunks(sstride)) {
if (mx == 0) && (my == 0) {
let dst = &mut dst[doff..];
for (out, src) in dst.chunks_mut(dstride).take(size).zip(src.chunks(sstride)) {