plements an ImageConsumer which can be attached
 to an Image or ImageProducer object to retrieve a subset of the pixels
 in that image.  Here is an example:
 <pre>

 public void handlesinglepixel(int x, int y, int pixel) {
	int alpha = (pixel >> 24) & 0xff;
	int red   = (pixel >> 16) & 0xff;
	int green = (pixel >>  8) & 0xff;
	int blue  = (pixel      ) & 0xff;
	// Deal with the pixel as necessary...
 }

 public void handlepixels(Image img, int x, int y, int w, int h) {
	int[] pixels = new int[w * h];
	Pixel