1/*
2 * Copyright (c) 2014, 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
24/**
25 * @test
26 * @bug     8041465
27 * @summary Test verifies that standard ImageIO plugins handle
28 *          multiple reads correctly.
29 *
30 * @run     main MultiReadTest
31 */
32
33import java.awt.Color;
34import java.awt.Graphics2D;
35import java.awt.Rectangle;
36import java.awt.image.BufferedImage;
37import java.io.File;
38import java.io.IOException;
39import javax.imageio.ImageIO;
40import javax.imageio.ImageReadParam;
41import javax.imageio.ImageReader;
42import javax.imageio.stream.ImageInputStream;
43
44public class MultiReadTest {
45
46    private static final File pwd = new File(".");
47
48    private static final Color srcColor = Color.red;
49    private static final int width = 200;
50    private static final int height = 200;
51
52    private static final int max = 5;
53
54    public static void main(String[] args) throws IOException {
55        final String[] formats = { "bmp", "png", "gif", "jpg", "tif" };
56
57        for (String f : formats) {
58            test(f);
59        }
60    }
61
62    private static void test(String format) throws IOException {
63        System.out.println("Format: " + format);
64
65        BufferedImage src = createSrc();
66
67        ImageInputStream iis = prepareInput(src, format);
68
69        ImageReader reader = ImageIO.getImageReaders(iis).next();
70
71        reader.setInput(iis);
72
73        ImageReadParam p = reader.getDefaultReadParam();
74        int cnt = 0;
75        do {
76            System.out.println("cnt: " + cnt);
77            p.setSourceRegion(new Rectangle(width / 4, height / 4,
78                                            width / 2, height / 2));
79
80            BufferedImage dst = reader.read(0, p);
81
82            final Color c = new Color(dst.getRGB(10, 10), true);
83
84            if (!sameColor(c, srcColor)) {
85                throw new RuntimeException(
86                    String.format("Test failed: read color 0x%X\n",
87                                  c.getRGB()));
88            }
89        } while (++cnt < max);
90    }
91
92    private static boolean sameColor(Color c1, Color c2) {
93        final float delta = 0.1f;
94
95        float[] rgb1 = new float[4];
96        float[] rgb2 = new float[4];
97
98        rgb1 = c1.getRGBComponents(rgb1);
99        rgb2 = c2.getRGBComponents(rgb2);
100
101        for (int i = 0; i < rgb1.length; i++) {
102            if (Math.abs(rgb1[i] - rgb2[i]) > delta) {
103                return false;
104            }
105        }
106        return true;
107    }
108
109    private static BufferedImage createSrc() {
110        BufferedImage img = new BufferedImage(width, height,
111                BufferedImage.TYPE_INT_RGB);
112
113        Graphics2D g = img.createGraphics();
114        g.setColor(srcColor);
115        g.fillRect(0, 0, width, height);
116        g.dispose();
117
118        return img;
119    }
120
121    private static ImageInputStream prepareInput(BufferedImage src, String format) throws IOException {
122        File f = File.createTempFile("src_", "." + format, pwd);
123
124        if (ImageIO.write(src, format, f)) {
125            return ImageIO.createImageInputStream(f);
126        }
127        return null;
128    }
129}
130