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copied!<p>If you don't mind using Swing, this <a href="https://stackoverflow.com/questions/2901472">example</a> shows how to quickly zoom in on a <code>BufferedImage</code> obtained from an <code>Icon</code>. In your case, you'd want an 8x8 <code>BufferedImage</code> that gets filled in <code>mouseMoved()</code> with the pixels seen by the robot.</p> <p>Addendum: Here's a snapshot of the top, left corner of your example.</p> <p>Addendum:</p> <blockquote> <p>Zooming itself is not important...</p> </blockquote> <p>The slow part is getting pixels from the desktop; scaling is minor. If you just want to see a variety of animation techniques, have a look at this <a href="http://sites.google.com/site/drjohnbmatthews/kineticmodel" rel="nofollow noreferrer">example</a>.</p> <p>Addendum: As getting individual pixels is slow and the <code>createScreenCapture()</code> method suggested by @Steve McLeod is fast, here's the idea I was driving at. You can see it also updates much more smoothly. Note that releasing the mouse button allows one to see the captured colors.</p> <p><img src="https://i.stack.imgur.com/yH2NS.png" alt="Zoom.png"></p> <pre><code>import java.awt.AWTException; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Point; import java.awt.Rectangle; import java.awt.Robot; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.image.BufferedImage; import javax.swing.JFrame; import javax.swing.JPanel; /** @see https://stackoverflow.com/questions/3742731 */ public class Zoom extends JPanel implements MouseMotionListener { private static final int SIZE = 16; private static final int S2 = SIZE / 2; private static final int SCALE = 48; private BufferedImage img; private Robot robot; public Zoom() { super(true); this.setPreferredSize(new Dimension(SIZE * SCALE, SIZE * SCALE)); img = new BufferedImage(SIZE, SIZE, BufferedImage.TYPE_INT_RGB); try { robot = new Robot(); } catch (AWTException e) { e.printStackTrace(System.err); } } @Override protected void paintComponent(Graphics g) { g.drawImage(img, 0, 0, getWidth(), getHeight(), null); } @Override public void mouseMoved(MouseEvent e) { Point p = e.getPoint(); int x = p.x * SIZE / getWidth(); int y = p.y * SIZE / getHeight(); int c = img.getRGB(x, y); this.setToolTipText(x + "," + y + ": " + String.format("%08X", c)); } @Override public void mouseDragged(MouseEvent e) { int x = e.getXOnScreen(); int y = e.getYOnScreen(); Rectangle rect = new Rectangle(x - S2, y - S2, SIZE, SIZE); img = robot.createScreenCapture(rect); repaint(); } private static void create() { JFrame f = new JFrame("Click & drag to zoom."); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Zoom zoom = new Zoom(); f.add(zoom); f.pack(); f.setVisible(true); zoom.addMouseMotionListener(zoom); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { create(); } }); } } </code></pre>

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