static GrabbableRGBBytePixels grabbableRGBBytePixels(BufferedImage img) {
  Raster raster = img.getRaster();
  SampleModel _sampleModel = raster.getSampleModel();
  if (!_sampleModel instanceof PixelInterleavedSampleModel) null;
  
  // Check if we need a conversion to RGB (e.g. after unpacking a JPEG)
  var imageModel = img.getColorModel();
  if (imageModel != ColorModel.getRGBdefault()) null;

  PixelInterleavedSampleModel sampleModel = cast _sampleModel;
  DataBufferByte dataBuffer = cast raster.getDataBuffer();
  assertEquals(1, dataBuffer.getNumBanks());
  assertEquals(DataBuffer.TYPE_BYTE, dataBuffer.getDataType());

  // Let's at this point assume the raster data is what we
  // think it is... (TODO: test on unusual platforms)
  
  int w = img.getWidth(), h = img.getHeight();
  int pixelStride = sampleModel.getPixelStride();
  int scanlineStride = sampleModel.getScanlineStride();
  byte[] pixels = dataBuffer.getData();
  int offset = dataBuffer.getOffset();
  int translateX = raster.getSampleModelTranslateX();
  int translateY = raster.getSampleModelTranslateY();
  offset += -translateX-translateY*scanlineStride;
  
  ret GrabbableRGBBytePixels(pixels, w, h, offset, scanlineStride, pixelStride);
}