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  */
  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 
  33 import java.awt.Color;
  34 import java.awt.Graphics2D;
  35 import java.awt.Rectangle;
  36 import java.awt.image.BufferedImage;
  37 import java.io.File;
  38 import java.io.IOException;
  39 import javax.imageio.ImageIO;
  40 import javax.imageio.ImageReadParam;
  41 import javax.imageio.ImageReader;
  42 import javax.imageio.stream.ImageInputStream;
  43 
  44 public 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 }