1 /*
   2  * Copyright (c) 2012, 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.Color;
  25 import java.awt.Graphics;
  26 import java.awt.GraphicsConfiguration;
  27 import java.awt.GraphicsEnvironment;
  28 import java.awt.Transparency;
  29 import java.awt.image.BufferedImage;
  30 import java.awt.image.VolatileImage;
  31 
  32 /**
  33  * @test
  34  * @bug 7181438
  35  * @summary Verifies that we get correct alpha, when we draw opaque
  36  * BufferedImage to non opaque VolatileImage via intermediate opaque texture.
  37  * @author Sergey Bylokhov
  38  * @run main/othervm -Dsun.java2d.accthreshold=0 bug7181438
  39  */
  40 public final class bug7181438 {
  41 
  42     private static final int SIZE = 500;
  43 
  44     public static void main(final String[] args) {
  45 
  46         final BufferedImage bi = createBufferedImage();
  47         final VolatileImage vi = createVolatileImage();
  48         final Graphics s2dVi = vi.getGraphics();
  49 
  50         //sw->texture->surface blit
  51         s2dVi.drawImage(bi, 0, 0, null);
  52 
  53         final BufferedImage results = vi.getSnapshot();
  54         for (int i = 0; i < SIZE; ++i) {
  55             for (int j = 0; j < SIZE; ++j) {
  56                 //Image should be opaque: (black color and alpha = 255)
  57                 if (results.getRGB(i, j) != 0xFF000000) {
  58                     throw new RuntimeException("Failed: Wrong alpha");
  59                 }
  60             }
  61         }
  62         System.out.println("Passed");
  63     }
  64 
  65 
  66     private static VolatileImage createVolatileImage() {
  67         final GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
  68         final GraphicsConfiguration gc = ge.getDefaultScreenDevice().getDefaultConfiguration();
  69         return gc.createCompatibleVolatileImage(SIZE, SIZE,
  70                                                 Transparency.TRANSLUCENT);
  71     }
  72 
  73     private static BufferedImage createBufferedImage() {
  74         final BufferedImage bi = new BufferedImage(SIZE, SIZE,
  75                                                    BufferedImage.TYPE_INT_RGB);
  76         final Graphics bg = bi.getGraphics();
  77         //Black color and alpha = 0
  78         bg.setColor(new Color(0, 0, 0, 0));
  79         bg.fillRect(0, 0, SIZE, SIZE);
  80         bg.dispose();
  81         return bi;
  82     }
  83 }