1 /*
   2  * Copyright (c) 2015, 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 import java.awt.AlphaComposite;
  25 import java.awt.Color;
  26 import java.awt.Graphics2D;
  27 import java.awt.GraphicsConfiguration;
  28 import java.awt.GraphicsEnvironment;
  29 import java.awt.Image;
  30 import java.awt.image.BufferedImage;
  31 import java.awt.image.VolatileImage;
  32 
  33 import static java.awt.Transparency.BITMASK;
  34 
  35 /**
  36  * @test
  37  * @key headful
  38  * @bug 7188942
  39  * @summary We should get correct volatile image, when we use BITMASK
  40  *          transparency
  41  */
  42 public final class BitmaskVolatileImage {
  43 
  44     public static final int S = 8;
  45 
  46     public static void main(final String[] args) {
  47         GraphicsConfiguration gc =
  48                 GraphicsEnvironment.getLocalGraphicsEnvironment()
  49                         .getDefaultScreenDevice().getDefaultConfiguration();
  50         VolatileImage vi = gc.createCompatibleVolatileImage(S, S, BITMASK);
  51         BufferedImage ci = gc.createCompatibleImage(S, S, BITMASK);
  52 
  53         int attempt = 0;
  54         do {
  55             if (++attempt > 10) {
  56                 throw new RuntimeException("Too many attempts: " + attempt);
  57             }
  58             vi.validate(gc);
  59             test(vi, ci, gc);
  60         } while (vi.contentsLost());
  61     }
  62 
  63     private static void test(VolatileImage vi, BufferedImage ci, GraphicsConfiguration gc) {
  64         for (int r = 0; r <= 255; ++r) {
  65             for (int a = 0; a <= 255; ++a) {
  66                 fill(vi, new Color(r, 0, 0, a));
  67                 fill(ci, new Color(r, 0, 0, a));
  68                 validate(ci, vi.getSnapshot());
  69             }
  70         }
  71     }
  72 
  73     private static void fill(Image image, Color color) {
  74         Graphics2D g2d = (Graphics2D) image.getGraphics();
  75         g2d.setColor(color);
  76         g2d.setComposite(AlphaComposite.Src);
  77         g2d.fillRect(0, 0, S, S);
  78         g2d.dispose();
  79     }
  80 
  81     private static void validate(BufferedImage ci, BufferedImage snapshot) {
  82         for (int y = 0; y < ci.getHeight(); y++) {
  83             for (int x = 0; x < ci.getWidth(); x++) {
  84                 int ci_rgb = ci.getRGB(x, y);
  85                 int vi_rgb = snapshot.getRGB(x, y);
  86                 if (ci_rgb != vi_rgb) {
  87                     System.err.println("Exp:" + Integer.toHexString(ci_rgb));
  88                     System.err.println("Actual:" + Integer.toHexString(vi_rgb));
  89                     throw new RuntimeException("Colors mismatch!");
  90                 }
  91             }
  92         }
  93     }
  94 }