!7

p-substance {
  final ImageSurface is = showImage(makeImage(100, 100));
  is.addComponentListener(new ComponentAdapter {
    public void componentResized(ComponentEvent e) {
      print("component resized. " + is.getSize());
      BufferedImage img = is.getImage();
      if (img.getWidth() != is.getWidth() || img.getHeight() != is.getHeight())
        is.setImage(makeImage(is.getWidth(), is.getHeight()));
    }
  });
}

static BufferedImage makeImage(final int w, final int h) {
  ret renderImage(w, h, func(int x, int y) {
    ret x < w/2 != y < h/2;
  });
}