121 lines
4.4 KiB
Java
121 lines
4.4 KiB
Java
/*
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* Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4415068 4622201
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* @summary Tests if the JPEG writer responds to the compression quality setting
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*/
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import java.awt.Color;
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import java.awt.Graphics;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.IOException;
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import java.util.Iterator;
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import java.util.Random;
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import javax.imageio.IIOImage;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageTypeSpecifier;
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import javax.imageio.ImageWriteParam;
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import javax.imageio.ImageWriter;
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import javax.imageio.stream.ImageOutputStream;
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public class CompressionBug {
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public CompressionBug() throws IOException {
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File fileHighComp = File.createTempFile("CompressionHigh", ".jpg");
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File fileLowComp = File.createTempFile("CompressionLow", ".jpg");
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fileHighComp.deleteOnExit();
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fileLowComp.deleteOnExit();
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ImageOutputStream iosHighComp =
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ImageIO.createImageOutputStream(fileHighComp);
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ImageOutputStream iosLowComp =
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ImageIO.createImageOutputStream(fileLowComp);
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int width = 100;
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int height = 100;
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BufferedImage bi =
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new BufferedImage(width, height,
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BufferedImage.TYPE_INT_RGB);
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Graphics g = bi.createGraphics();
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Random r = new Random();
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for (int i = 0; i < 100; i++) {
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Color c = new Color(r.nextInt(256),
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r.nextInt(256),
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r.nextInt(256));
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int x = r.nextInt(width);
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int y = r.nextInt(height);
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int w = r.nextInt(width - x);
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int h = r.nextInt(height - y);
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g.setColor(c);
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g.fillRect(x, y, w, h);
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}
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ImageTypeSpecifier typeSpecifier =
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new ImageTypeSpecifier(bi.getColorModel(),
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bi.getSampleModel());
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ImageWriter writer = null;
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Iterator iter = ImageIO.getImageWriters(typeSpecifier,"jpeg");
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while (iter.hasNext()) {
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writer = (ImageWriter)iter.next();
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break;
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}
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IIOImage iioImg = new IIOImage(bi, null, null);
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ImageWriteParam wParam = writer.getDefaultWriteParam();
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wParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
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// write the highly compressed image (a compression quality setting of
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// 0.1f means low visual quality and small file size)
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wParam.setCompressionQuality(0.1f);
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writer.setOutput(iosHighComp);
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writer.write(null, iioImg, wParam);
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// write the somewhat compressed image (a compression quality setting
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// of 0.9f means high visual quality and large file size)
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wParam.setCompressionQuality(0.9f);
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writer.setOutput(iosLowComp);
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writer.write(null, iioImg, wParam);
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long sizeOfFileLowComp = fileLowComp.length();
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long sizeOfFileHighComp = fileHighComp.length();
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// the highly compressed image file should have a smaller file size
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// than the image file with low compression; throw an exception if
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// this isn't the case
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if (sizeOfFileLowComp < sizeOfFileHighComp) {
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throw new RuntimeException("Lower compression quality did not " +
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"reduce file size!");
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}
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}
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public static void main(String args[]) throws IOException {
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new CompressionBug();
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}
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}
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