1 /*
   2  * Copyright (c) 2012, 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 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  * @key headful
  35  * @bug 7181438
  36  * @summary Verifies that we get correct alpha, when we draw opaque
  37  * BufferedImage to non opaque VolatileImage via intermediate opaque texture.
  38  * @author Sergey Bylokhov
  39  * @run main/othervm -Dsun.java2d.accthreshold=0 bug7181438
  40  */
  41 public final class bug7181438 {
  42 
  43     private static final int SIZE = 500;
  44 
  45     public static void main(final String[] args) {
  46 
  47         final BufferedImage bi = createBufferedImage();
  48         final VolatileImage vi = createVolatileImage();
  49         final Graphics s2dVi = vi.getGraphics();
  50 
  51         //sw->texture->surface blit
  52         s2dVi.drawImage(bi, 0, 0, null);
  53 
  54         final BufferedImage results = vi.getSnapshot();
  55         for (int i = 0; i < SIZE; ++i) {
  56             for (int j = 0; j < SIZE; ++j) {
  57                 //Image should be opaque: (black color and alpha = 255)
  58                 if (results.getRGB(i, j) != 0xFF000000) {
  59                     throw new RuntimeException("Failed: Wrong alpha");
  60                 }
  61             }
  62         }
  63         System.out.println("Passed");
  64     }
  65 
  66 
  67     private static VolatileImage createVolatileImage() {
  68         final GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
  69         final GraphicsConfiguration gc = ge.getDefaultScreenDevice().getDefaultConfiguration();
  70         return gc.createCompatibleVolatileImage(SIZE, SIZE,
  71                                                 Transparency.TRANSLUCENT);
  72     }
  73 
  74     private static BufferedImage createBufferedImage() {
  75         final BufferedImage bi = new BufferedImage(SIZE, SIZE,
  76                                                    BufferedImage.TYPE_INT_RGB);
  77         final Graphics bg = bi.getGraphics();
  78         //Black color and alpha = 0
  79         bg.setColor(new Color(0, 0, 0, 0));
  80         bg.fillRect(0, 0, SIZE, SIZE);
  81         bg.dispose();
  82         return bi;
  83     }
  84 }