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 6764257
  28  * @summary Tests that the alpha in opaque images doesn't affect result of alpha
  29  * compositing
  30  * @author Dmitri.Trembovetski@sun.com: area=Graphics
  31  * @run main/othervm OpaqueImageToSurfaceBlitTest
  32  * @run main/othervm -Dsun.java2d.noddraw=true OpaqueImageToSurfaceBlitTest
  33  * @run main/othervm -Dsun.java2d.opengl=True OpaqueImageToSurfaceBlitTest
  34  */
  35 
  36 import java.awt.AlphaComposite;
  37 import java.awt.Graphics2D;
  38 import java.awt.GraphicsConfiguration;
  39 import java.awt.GraphicsDevice;
  40 import java.awt.GraphicsEnvironment;
  41 import java.awt.image.BufferedImage;
  42 import java.awt.image.DataBufferInt;
  43 import java.awt.image.VolatileImage;
  44 
  45 public class OpaqueImageToSurfaceBlitTest {
  46 
  47     public static void main(String[] args) {
  48 
  49         GraphicsEnvironment ge =
  50             GraphicsEnvironment.getLocalGraphicsEnvironment();
  51         GraphicsDevice gd = ge.getDefaultScreenDevice();
  52         GraphicsConfiguration gc = gd.getDefaultConfiguration();
  53         VolatileImage vi = gc.createCompatibleVolatileImage(16, 16);
  54         vi.validate(gc);
  55 
  56         BufferedImage bi =
  57             new BufferedImage(2, 2, BufferedImage.TYPE_INT_RGB);
  58         int data[] = ((DataBufferInt)bi.getRaster().getDataBuffer()).getData();
  59         data[0] = 0x0000007f;
  60         data[1] = 0x0000007f;
  61         data[2] = 0xff00007f;
  62         data[3] = 0xff00007f;
  63         Graphics2D g = vi.createGraphics();
  64         g.setComposite(AlphaComposite.SrcOver.derive(0.999f));
  65         g.drawImage(bi, 0, 0, null);
  66 
  67         bi = vi.getSnapshot();
  68         if (bi.getRGB(0, 0) != bi.getRGB(1, 1)) {
  69             throw new RuntimeException("Test FAILED: color at 0x0 ="+
  70                 Integer.toHexString(bi.getRGB(0, 0))+" differs from 1x1 ="+
  71                 Integer.toHexString(bi.getRGB(1,1)));
  72         }
  73 
  74         System.out.println("Test PASSED.");
  75     }
  76 }