1 /*
   2  * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6648018
  27  * @summary Tests that we don't run into infinite validation loop when copying
  28             a VolatileImage to the screen
  29  * @author Dmitri.Trembovetski@sun.com: area=Graphics
  30  * @run main/othervm InfiniteValidationLoopTest
  31  * @run main/othervm -Dsun.java2d.d3d=false InfiniteValidationLoopTest
  32  */
  33 import java.awt.Color;
  34 import java.awt.Frame;
  35 import java.awt.Graphics;
  36 import java.awt.GraphicsConfiguration;
  37 import static java.awt.image.VolatileImage.*;
  38 import java.awt.image.VolatileImage;
  39 import java.util.concurrent.CountDownLatch;
  40 
  41 public class InfiniteValidationLoopTest extends Frame {
  42     private static volatile boolean failed = false;
  43     private static final int LOOP_THRESHOLD = 50;
  44     private static volatile CountDownLatch latch;
  45     private VolatileImage vi;
  46 
  47     public InfiniteValidationLoopTest() {
  48         super("InfiniteValidationLoopTest");
  49     }
  50 
  51     @Override
  52     public void paint(Graphics g) {
  53         try {
  54             runTest(g);
  55         } finally {
  56             latch.countDown();
  57         }
  58     }
  59 
  60     private void runTest(Graphics g) {
  61         int status = IMAGE_OK;
  62         int count1 = 0;
  63         do {
  64             GraphicsConfiguration gc = getGraphicsConfiguration();
  65             int count2 = 0;
  66             while (vi == null || (status = vi.validate(gc)) != IMAGE_OK) {
  67                 if (++count2 > LOOP_THRESHOLD) {
  68                     System.err.println("Infinite loop detected: count2="+count2);
  69                     failed = true;
  70                     return;
  71                 }
  72                 if (vi == null || status == IMAGE_INCOMPATIBLE) {
  73                     if (vi != null) { vi.flush(); vi = null; }
  74                     vi = gc.createCompatibleVolatileImage(100, 100);
  75                     continue;
  76                 }
  77                 if (status == IMAGE_RESTORED) {
  78                     Graphics gg = vi.getGraphics();
  79                     gg.setColor(Color.green);
  80                     gg.fillRect(0, 0, vi.getWidth(), vi.getHeight());
  81                     break;
  82                 }
  83             }
  84             g.drawImage(vi, getInsets().left, getInsets().top, null);
  85             if (++count1 > LOOP_THRESHOLD) {
  86                 System.err.println("Infinite loop detected: count1="+count1);
  87                 failed = true;
  88                 return;
  89             }
  90         } while (vi.contentsLost());
  91     }
  92 
  93     public static void main(String[] args) {
  94         latch = new CountDownLatch(1);
  95         InfiniteValidationLoopTest t1 = new InfiniteValidationLoopTest();
  96         t1.pack();
  97         t1.setSize(200, 200);
  98         t1.setVisible(true);
  99         try { latch.await(); } catch (InterruptedException ex) {}
 100         t1.dispose();
 101 
 102         latch = new CountDownLatch(1);
 103         t1 = new InfiniteValidationLoopTest();
 104         t1.pack();
 105         t1.setSize(50, 50);
 106         t1.setVisible(true);
 107         try { latch.await(); } catch (InterruptedException ex) {}
 108         t1.dispose();
 109 
 110         if (failed) {
 111             throw new
 112                 RuntimeException("Failed: infinite validattion loop detected");
 113         }
 114         System.out.println("Test PASSED");
 115     }
 116 }