static byte[] testQOI(BufferedImage img default shootScreen2()) {
  byte[] qoi = toQOI(img);
  
  print("Image size: " + str_megapixels(img));
  print("Compressed: " + nBytes(qoi);
  var bpp = bitsPerPixel(qoi, img);
  print("Bits per pixel: " + formatDouble2(bpp));
  print("Compression factor over RGB: " + formatDouble1(doubleRatio(24, bpp)));
  
  var restoredImage = fromQOI(qoi);
  assertSameImage(img, restoredImage);
  
  ret qoi;
}