IncorrectOffset.java revision 6885:39ce1056694d 
1/*
2 * Copyright (c) 2013, 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.AlphaComposite;
25import java.awt.Color;
26import java.awt.Graphics2D;
27import java.awt.GraphicsConfiguration;
28import java.awt.GraphicsEnvironment;
29import java.awt.image.BufferedImage;
30import java.awt.image.VolatileImage;
31
32/**
33 * @test
34 * @bug 8000629
35 * @summary Temporary backbuffer in the DrawImage should have correct offset.
36 * @author Sergey Bylokhov
37 */
38public final class IncorrectOffset {
39
40    private static final int width = 400;
41    private static final int height = 400;
42
43    public static void main(final String[] args) {
44        GraphicsEnvironment ge =
45                GraphicsEnvironment.getLocalGraphicsEnvironment();
46        GraphicsConfiguration gc =
47                ge.getDefaultScreenDevice().getDefaultConfiguration();
48        VolatileImage vi = gc.createCompatibleVolatileImage(width, height);
49        BufferedImage bi = new BufferedImage(width / 4, height / 4,
50                                             BufferedImage.TYPE_INT_ARGB);
51        while (true) {
52            vi.validate(gc);
53            Graphics2D g2d = vi.createGraphics();
54            g2d.setColor(Color.black);
55            g2d.fillRect(0, 0, width, height);
56            g2d.setColor(Color.green);
57            g2d.fillRect(width / 4, height / 4, width / 2, height / 2);
58            g2d.dispose();
59
60            if (vi.validate(gc) != VolatileImage.IMAGE_OK) {
61                try {
62                    Thread.sleep(100);
63                } catch (InterruptedException ignored) {
64                }
65                continue;
66            }
67
68            Graphics2D g = bi.createGraphics();
69            g.setComposite(AlphaComposite.Src);
70            // Scale part of VI to BI. Only green area should be copied.
71            g.drawImage(vi, 0, 0, width / 4, height / 4, width / 4, height / 4,
72                        width / 4 + width / 2, height / 4 + height / 2, null);
73            g.dispose();
74
75            if (vi.contentsLost()) {
76                try {
77                    Thread.sleep(100);
78                } catch (InterruptedException ignored) {
79                }
80                continue;
81            }
82
83            for (int x = 0; x < width / 4; ++x) {
84                for (int y = 0; y < height / 4; ++y) {
85                    if (bi.getRGB(x, y) != Color.green.getRGB()) {
86                        throw new RuntimeException("Test failed.");
87                    }
88                }
89            }
90            break;
91        }
92    }
93}
94