IncorrectOffset.java revision 14851:980da45565c8 
1/*
2 * Copyright (c) 2013, 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.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 * @key headful
35 * @bug 8000629
36 * @summary Temporary backbuffer in the DrawImage should have correct offset.
37 * @author Sergey Bylokhov
38 */
39public final class IncorrectOffset {
40
41    private static final int width = 400;
42    private static final int height = 400;
43
44    public static void main(final String[] args) {
45        GraphicsEnvironment ge =
46                GraphicsEnvironment.getLocalGraphicsEnvironment();
47        GraphicsConfiguration gc =
48                ge.getDefaultScreenDevice().getDefaultConfiguration();
49        VolatileImage vi = gc.createCompatibleVolatileImage(width, height);
50        BufferedImage bi = new BufferedImage(width / 4, height / 4,
51                                             BufferedImage.TYPE_INT_ARGB);
52        while (true) {
53            vi.validate(gc);
54            Graphics2D g2d = vi.createGraphics();
55            g2d.setColor(Color.black);
56            g2d.fillRect(0, 0, width, height);
57            g2d.setColor(Color.green);
58            g2d.fillRect(width / 4, height / 4, width / 2, height / 2);
59            g2d.dispose();
60
61            if (vi.validate(gc) != VolatileImage.IMAGE_OK) {
62                try {
63                    Thread.sleep(100);
64                } catch (InterruptedException ignored) {
65                }
66                continue;
67            }
68
69            Graphics2D g = bi.createGraphics();
70            g.setComposite(AlphaComposite.Src);
71            // Scale part of VI to BI. Only green area should be copied.
72            g.drawImage(vi, 0, 0, width / 4, height / 4, width / 4, height / 4,
73                        width / 4 + width / 2, height / 4 + height / 2, null);
74            g.dispose();
75
76            if (vi.contentsLost()) {
77                try {
78                    Thread.sleep(100);
79                } catch (InterruptedException ignored) {
80                }
81                continue;
82            }
83
84            for (int x = 0; x < width / 4; ++x) {
85                for (int y = 0; y < height / 4; ++y) {
86                    if (bi.getRGB(x, y) != Color.green.getRGB()) {
87                        throw new RuntimeException("Test failed.");
88                    }
89                }
90            }
91            break;
92        }
93    }
94}
95