1 /*
2  * Copyright (c) 2012, 2018, 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 8198613
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 
main(final String[] args)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 
createVolatileImage()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 
createBufferedImage()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 }
85