1 /*
   2  * Copyright (c) 2007, 2016, 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  * @key headful
  27  * @bug 6648018
  28  * @summary Tests that we don't run into infinite validation loop when copying
  29             a VolatileImage to the screen
  30  * @author Dmitri.Trembovetski@sun.com: area=Graphics
  31  * @run main/othervm InfiniteValidationLoopTest
  32  * @run main/othervm -Dsun.java2d.d3d=false InfiniteValidationLoopTest
  33  */
  34 import java.awt.Color;
  35 import java.awt.Frame;
  36 import java.awt.Graphics;
  37 import java.awt.GraphicsConfiguration;
  38 import static java.awt.image.VolatileImage.*;
  39 import java.awt.image.VolatileImage;
  40 import java.util.concurrent.CountDownLatch;
  41 
  42 public class InfiniteValidationLoopTest extends Frame {
  43     private static volatile boolean failed = false;
  44     private static final int LOOP_THRESHOLD = 50;
  45     private static volatile CountDownLatch latch;
  46     private VolatileImage vi;
  47 
  48     public InfiniteValidationLoopTest() {
  49         super("InfiniteValidationLoopTest");
  50     }
  51 
  52     @Override
  53     public void paint(Graphics g) {
  54         try {
  55             runTest(g);
  56         } finally {
  57             latch.countDown();
  58         }
  59     }
  60 
  61     private void runTest(Graphics g) {
  62         int status = IMAGE_OK;
  63         int count1 = 0;
  64         do {
  65             GraphicsConfiguration gc = getGraphicsConfiguration();
  66             int count2 = 0;
  67             while (vi == null || (status = vi.validate(gc)) != IMAGE_OK) {
  68                 if (++count2 > LOOP_THRESHOLD) {
  69                     System.err.println("Infinite loop detected: count2="+count2);
  70                     failed = true;
  71                     return;
  72                 }
  73                 if (vi == null || status == IMAGE_INCOMPATIBLE) {
  74                     if (vi != null) { vi.flush(); vi = null; }
  75                     vi = gc.createCompatibleVolatileImage(100, 100);
  76                     continue;
  77                 }
  78                 if (status == IMAGE_RESTORED) {
  79                     Graphics gg = vi.getGraphics();
  80                     gg.setColor(Color.green);
  81                     gg.fillRect(0, 0, vi.getWidth(), vi.getHeight());
  82                     break;
  83                 }
  84             }
  85             g.drawImage(vi, getInsets().left, getInsets().top, null);
  86             if (++count1 > LOOP_THRESHOLD) {
  87                 System.err.println("Infinite loop detected: count1="+count1);
  88                 failed = true;
  89                 return;
  90             }
  91         } while (vi.contentsLost());
  92     }
  93 
  94     public static void main(String[] args) {
  95         latch = new CountDownLatch(1);
  96         InfiniteValidationLoopTest t1 = new InfiniteValidationLoopTest();
  97         t1.pack();
  98         t1.setSize(200, 200);
  99         t1.setVisible(true);
 100         try { latch.await(); } catch (InterruptedException ex) {}
 101         t1.dispose();
 102 
 103         latch = new CountDownLatch(1);
 104         t1 = new InfiniteValidationLoopTest();
 105         t1.pack();
 106         t1.setSize(50, 50);
 107         t1.setVisible(true);
 108         try { latch.await(); } catch (InterruptedException ex) {}
 109         t1.dispose();
 110 
 111         if (failed) {
 112             throw new
 113                 RuntimeException("Failed: infinite validattion loop detected");
 114         }
 115         System.out.println("Test PASSED");
 116     }
 117 }