WritableRasterからDataBufferを取得して画像の比較

int w = iia.getIconWidth();
int h = iia.getIconHeight();
int[] pixelsA = getData(iia, w, h);
int[] pixelsB = getData(iib, w, h);
source = new MemoryImageSource(w, h, pixelsA, 0, w);
for (int i = 0; i < pixelsA.length; i++) {
  if (pixelsA[i] == pixelsB[i]) {
    pixelsA[i] = pixelsA[i] & 0x44_FF_FF_FF;
  }
}
// ...
private static int[] getData(Image img, int w, int h) {
  BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
  Graphics g = image.createGraphics();
  g.drawImage(img, 0, 0, null);
  g.dispose();
  // XXX?: return ((DataBufferInt) image.getRaster().getDataBuffer()).getData();
  int[] pixels = new int[w * h];
  EventQueue systemEventQueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
  SecondaryLoop loop = systemEventQueue.createSecondaryLoop();
  Thread worker = new Thread(() -> {
    try {
      new PixelGrabber(image, 0, 0, w, h, pixels, 0, w).grabPixels();
    } catch (InterruptedException ex) {
      Thread.currentThread().interrupt();
    }
    loop.exit();
  });
  worker.start();
  loop.enter();
  return pixels;
}