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.Color;
24import java.awt.Graphics;
25import java.awt.Graphics2D;
26import java.awt.Image;
27import java.awt.Toolkit;
28import java.awt.image.BufferedImage;
29import java.awt.image.ImageObserver;
30import static java.awt.image.ImageObserver.*;
31import java.io.File;
32import javax.imageio.ImageIO;
33/*
34 * @test
35 * @bug 8065627
36 * @summary Animated GIFs fail to display on a HiDPI display
37 * @author Alexander Scherbatiy
38 * @run main MultiResolutionImageObserverTest
39 */
40
41public class MultiResolutionImageObserverTest {
42
43    private static final int TIMEOUT = 500;
44
45    public static void main(String[] args) throws Exception {
46
47        generateImages();
48        Toolkit toolkit = Toolkit.getDefaultToolkit();
49        Image image = Toolkit.getDefaultToolkit().getImage(IMAGE_NAME_1X);
50
51        LoadImageObserver sizeObserver
52                = new LoadImageObserver(WIDTH | HEIGHT);
53        toolkit.prepareImage(image, -1, -1, sizeObserver);
54        waitForImageLoading(sizeObserver, "The first observer is not called");
55
56        LoadImageObserver bitsObserver
57                = new LoadImageObserver(SOMEBITS | FRAMEBITS | ALLBITS);
58
59        BufferedImage buffImage = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
60        Graphics2D g2d = (Graphics2D) buffImage.createGraphics();
61        g2d.scale(2, 2);
62        g2d.drawImage(image, 0, 0, bitsObserver);
63        waitForImageLoading(bitsObserver, "The second observer is not called!");
64        g2d.dispose();
65    }
66
67    private static void waitForImageLoading(LoadImageObserver observer,
68            String errorMessage) throws Exception {
69
70        long endTime = System.currentTimeMillis() + TIMEOUT;
71
72        while (!observer.loaded && System.currentTimeMillis() < endTime) {
73            Thread.sleep(TIMEOUT / 10);
74        }
75
76        if (!observer.loaded) {
77            throw new RuntimeException(errorMessage);
78        }
79    }
80
81    private static final String IMAGE_NAME_1X = "image.png";
82    private static final String IMAGE_NAME_2X = "image@2x.png";
83
84    private static void generateImages() throws Exception {
85        generateImage(1);
86        generateImage(2);
87    }
88
89    private static void generateImage(int scale) throws Exception {
90        BufferedImage image = new BufferedImage(
91                scale * 200, scale * 300,
92                BufferedImage.TYPE_INT_RGB);
93        Graphics g = image.createGraphics();
94        g.setColor(scale == 1 ? Color.GREEN : Color.BLUE);
95        g.fillRect(0, 0, scale * 200, scale * 300);
96        File file = new File(scale == 1 ? IMAGE_NAME_1X : IMAGE_NAME_2X);
97        ImageIO.write(image, "png", file);
98        g.dispose();
99    }
100
101    private static class LoadImageObserver implements ImageObserver {
102
103        private final int infoflags;
104        private boolean loaded;
105
106        public LoadImageObserver(int flags) {
107            this.infoflags = flags;
108        }
109
110        @Override
111        public boolean imageUpdate(Image img, int flags, int x, int y, int width, int height) {
112
113            if ((flags & infoflags) != 0) {
114                loaded = true;
115            }
116
117            return !loaded;
118        }
119    }
120}
121