/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 
 * - Redistribution in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY
 * DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT OF OR
 * RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE OR
 * ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE
 * FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT,
 * SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF
 * THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS
 * BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed, licensed or
 * intended for use in the design, construction, operation or
 * maintenance of any nuclear facility.
 */

import java.awt.*;
import java.awt.event.*;

public class CopyAreaPerf extends Canvas implements Runnable {
    public static int SCROLLSIZE = 4;
    public static final int TESTW = 500;
    public static final int TESTH = 500;

    Thread animator;

    Image img;
    int imgw;
    int imgh;

    public void run() {
	Thread me = Thread.currentThread();
	Graphics imgg = null;
	Graphics scrg = getGraphics();
	int mode = 0;
	int count = 0;
	long start = System.currentTimeMillis();
	while (animator == me) {
	    int w = getWidth();
	    int h = getHeight();
	    if (img == null || imgw != w || imgh != h) {
		img = createImage(w, h);
		imgw = w;
		imgh = h;
		if (imgg != null) {
		    imgg.dispose();
		    imgg = null;
		}
	    }
	    if (imgg == null) {
		imgg = img.getGraphics();
		imgg.setColor(Color.lightGray);
		imgg.fillRect(0, 0, w, h);
		imgg.setColor(Color.red);
		imgg.fillRect(0, 0, w-1, 1);
		imgg.setColor(Color.blue);
		imgg.fillRect(w-1, 0, 1, h-1);
		imgg.setColor(Color.green);
		imgg.fillRect(1, h-1, w-1, 1);
		imgg.setColor(Color.yellow);
		imgg.fillRect(0, 1, 1, h-1);
	    }
	    switch (mode) {
	    case 0:	// scroll down
		if (count == 0) {
		    count = (h+SCROLLSIZE-1) / SCROLLSIZE;
		    for (int i = 1; i < SCROLLSIZE; i *= 2) {
			imgg.copyArea(1, 0, w-2, i, 0, i);
		    }
		}
		imgg.copyArea(1, 0, w-2, h-SCROLLSIZE-1, 0, SCROLLSIZE);
		break;
	    case 1:	// scroll left
		if (count == 0) {
		    count = (w+SCROLLSIZE-1) / SCROLLSIZE;
		    for (int i = 1; i < SCROLLSIZE; i *= 2) {
			imgg.copyArea(0, 1, i, h-2, i, 0);
		    }
		}
		imgg.copyArea(0, 1, w-SCROLLSIZE-1, h-2, SCROLLSIZE, 0);
		break;
	    case 2:	// scroll up
		if (count == 0) {
		    count = (h+SCROLLSIZE-1) / SCROLLSIZE;
		    for (int i = 1; i < SCROLLSIZE; i *= 2) {
			imgg.copyArea(1, h-i, w-2, i, 0, -i);
		    }
		}
		imgg.copyArea(1, SCROLLSIZE+1, w-2, h-SCROLLSIZE-1,
			      0, -SCROLLSIZE);
		break;
	    case 3:	// scroll right
		if (count == 0) {
		    count = (w+SCROLLSIZE-1) / SCROLLSIZE;
		    for (int i = 1; i < SCROLLSIZE; i *= 2) {
			imgg.copyArea(w-i, 1, i, h-2, -i, 0);
		    }
		}
		imgg.copyArea(SCROLLSIZE+1, 1, w-SCROLLSIZE-1, h-2,
			      -SCROLLSIZE, 0);
		break;
	    default:
		throw new InternalError("mode out of range");
	    }
	    if (--count == 0) {
		mode = (mode + 1) & 3;
		long end = System.currentTimeMillis();
		System.out.println("sequence took "+(end-start)+" ms");
		start = end;
	    }
	    scrg.drawImage(img, 0, 0, null);
	}
    }

    public synchronized void start() {
	animator = new Thread(this);
	animator.start();
    }

    public synchronized void stop() {
	animator = null;
    }

    public Dimension getPreferredSize() {
	return new Dimension(TESTW, TESTH);
    }

    public static void main(String argv[]) {
	if (argv.length > 0) {
	    SCROLLSIZE = Integer.parseInt(argv[0]);
	}
	Frame f = new Frame();
	f.addWindowListener(new WindowAdapter() {
	    public void windowClosing(WindowEvent e) { System.exit(0); }
	});
	CopyAreaPerf cap = new CopyAreaPerf();
	f.add(cap);
	f.pack();
	f.show();
	cap.start();
    }
}