1 /* 2 * Copyright (c) 2001, 2017, 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 4415068 4622201 27 * @summary Tests if the JPEG writer responds to the compression quality setting 28 */ 29 30 import java.awt.Color; 31 import java.awt.Graphics; 32 import java.awt.image.BufferedImage; 33 import java.io.File; 34 import java.io.IOException; 35 import java.util.Iterator; 36 import java.util.Random; 37 38 import javax.imageio.IIOImage; 39 import javax.imageio.ImageIO; 40 import javax.imageio.ImageTypeSpecifier; 41 import javax.imageio.ImageWriteParam; 42 import javax.imageio.ImageWriter; 43 import javax.imageio.stream.ImageOutputStream; 44 45 public class CompressionBug { 46 47 public CompressionBug() throws IOException { 48 File fileHighComp = File.createTempFile("CompressionHigh", ".jpg"); 49 File fileLowComp = File.createTempFile("CompressionLow", ".jpg"); 50 51 fileHighComp.deleteOnExit(); 52 fileLowComp.deleteOnExit(); 53 54 ImageOutputStream iosHighComp = 55 ImageIO.createImageOutputStream(fileHighComp); 56 ImageOutputStream iosLowComp = 57 ImageIO.createImageOutputStream(fileLowComp); 58 59 int width = 100; 60 int height = 100; 61 BufferedImage bi = 62 new BufferedImage(width, height, 63 BufferedImage.TYPE_INT_RGB); 64 Graphics g = bi.createGraphics(); 65 Random r = new Random(); 66 for (int i = 0; i < 100; i++) { 67 Color c = new Color(r.nextInt(256), 68 r.nextInt(256), 69 r.nextInt(256)); 70 int x = r.nextInt(width); 71 int y = r.nextInt(height); 72 int w = r.nextInt(width - x); 73 int h = r.nextInt(height - y); 74 g.setColor(c); 75 g.fillRect(x, y, w, h); 76 } 77 78 ImageTypeSpecifier typeSpecifier = 79 new ImageTypeSpecifier(bi.getColorModel(), 80 bi.getSampleModel()); 81 82 ImageWriter writer = null; 83 Iterator iter = ImageIO.getImageWriters(typeSpecifier,"jpeg"); 84 while (iter.hasNext()) { 85 writer = (ImageWriter)iter.next(); 86 break; 87 } 88 89 IIOImage iioImg = new IIOImage(bi, null, null); 90 ImageWriteParam wParam = writer.getDefaultWriteParam(); 91 wParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 92 93 // write the highly compressed image (a compression quality setting of 94 // 0.1f means low visual quality and small file size) 95 wParam.setCompressionQuality(0.1f); 96 writer.setOutput(iosHighComp); 97 writer.write(null, iioImg, wParam); 98 99 // write the somewhat compressed image (a compression quality setting 100 // of 0.9f means high visual quality and large file size) 101 wParam.setCompressionQuality(0.9f); 102 writer.setOutput(iosLowComp); 103 writer.write(null, iioImg, wParam); 104 105 long sizeOfFileLowComp = fileLowComp.length(); 106 long sizeOfFileHighComp = fileHighComp.length(); 107 108 // the highly compressed image file should have a smaller file size 109 // than the image file with low compression; throw an exception if 110 // this isn't the case 111 if (sizeOfFileLowComp < sizeOfFileHighComp) { 112 throw new RuntimeException("Lower compression quality did not " + 113 "reduce file size!"); 114 } 115 } 116 117 public static void main(String args[]) throws IOException { 118 new CompressionBug(); 119 } 120 }