static L<Rect> bwRawImageSearch_exact(BWImage big, BWImage pat, int maxEntries) {
  new L<Rect> found;
  int wp = pat.getWidth(), hp = pat.getHeight();
  int w = big.getWidth(), h = big.getHeight();
  for (int y = 0; y < h-hp; y++)
    for (int x = 0; x < w-wp; x++)
      if (bwImageSectionsIdentical(big, pat, x, y)) {
        found.add(new Rect(x, y, wp, hp));
        ping();
        if (l(found) >= maxEntries) ret found;
        x += wp-1;
      }
  ret found;
}

Began life as a copy of #1005893