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
24import java.awt.Color;
25import java.awt.Graphics;
26import java.awt.GraphicsConfiguration;
27import java.awt.GraphicsEnvironment;
28import java.awt.Transparency;
29import java.awt.image.BufferedImage;
30import 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 */
41public 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}
85