bug8032667_image_diff.java revision 10730:07156012ab78 
1/*
2 * Copyright (c) 2014, 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 */
23import java.awt.Dimension;
24import java.awt.Graphics;
25import java.awt.Graphics2D;
26import java.awt.Image;
27import java.awt.image.BufferedImage;
28import javax.swing.JCheckBox;
29import javax.swing.JComponent;
30import javax.swing.SwingUtilities;
31import jdk.testlibrary.OSInfo;
32
33/* @test
34 * @bug 8032667
35 * @summary [macosx] Components cannot be rendered in HiDPI to BufferedImage
36 * @library ../../../../lib/testlibrary
37 * @build jdk.testlibrary.OSInfo
38 * @run main bug8032667_image_diff
39 */
40public class bug8032667_image_diff {
41
42    static final int IMAGE_WIDTH = 130;
43    static final int IMAGE_HEIGHT = 50;
44
45    public static void main(String[] args) throws Exception {
46
47        if(!OSInfo.OSType.MACOSX.equals(OSInfo.getOSType())){
48            return;
49        }
50
51        SwingUtilities.invokeAndWait(new Runnable() {
52            @Override
53            public void run() {
54
55                JCheckBox checkBox = new JCheckBox();
56                checkBox.setSelected(true);
57                checkBox.setSize(new Dimension(IMAGE_WIDTH, IMAGE_HEIGHT));
58
59                final BufferedImage image1 = getHiDPIImage(checkBox);
60                final BufferedImage image2 = getScaledImage(checkBox);
61
62                if(equal(image1, image2)){
63                    throw new RuntimeException("2x image equals to non smooth image");
64                }
65            }
66        });
67    }
68
69    static boolean equal(BufferedImage image1, BufferedImage image2) {
70
71        int w = image1.getWidth();
72        int h = image1.getHeight();
73
74        if (w != image2.getWidth() || h != image2.getHeight()) {
75            return false;
76        }
77
78        for (int i = 0; i < w; i++) {
79            for (int j = 0; j < h; j++) {
80                int color1 = image1.getRGB(i, j);
81                int color2 = image2.getRGB(i, j);
82
83                if (color1 != color2) {
84                    return false;
85                }
86            }
87        }
88        return true;
89    }
90
91    static BufferedImage getHiDPIImage(JComponent component) {
92        return getImage(component, 2, IMAGE_WIDTH, IMAGE_HEIGHT);
93    }
94
95    static BufferedImage getScaledImage(JComponent component) {
96        Image image1x = getImage(component, 1, IMAGE_WIDTH, IMAGE_HEIGHT);
97        final BufferedImage image2x = new BufferedImage(
98                2 * IMAGE_WIDTH, 2 * IMAGE_HEIGHT, BufferedImage.TYPE_INT_ARGB);
99        final Graphics g = image2x.getGraphics();
100        ((Graphics2D) g).scale(2, 2);
101        g.drawImage(image1x, 0, 0, null);
102        g.dispose();
103        return image2x;
104    }
105
106    static BufferedImage getImage(JComponent component, int scale, int width, int height) {
107        final BufferedImage image = new BufferedImage(
108                scale * width, scale * height, BufferedImage.TYPE_INT_ARGB);
109        final Graphics g = image.getGraphics();
110        ((Graphics2D) g).scale(scale, scale);
111        component.paint(g);
112        g.dispose();
113        return image;
114    }
115}
116