001 /* =========================================================== 002 * JFreeChart : a free chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 006 * 007 * Project Info: http://www.jfree.org/jfreechart/index.html 008 * 009 * This library is free software; you can redistribute it and/or modify it 010 * under the terms of the GNU Lesser General Public License as published by 011 * the Free Software Foundation; either version 2.1 of the License, or 012 * (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but 015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 017 * License for more details. 018 * 019 * You should have received a copy of the GNU Lesser General Public 020 * License along with this library; if not, write to the Free Software 021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 022 * USA. 023 * 024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 025 * in the United States and other countries.] 026 * 027 * -------------------------- 028 * SunJPEGEncoderAdapter.java 029 * -------------------------- 030 * (C) Copyright 2004, 2005, by Richard Atkinson and Contributors. 031 * 032 * Original Author: Richard Atkinson; 033 * Contributor(s): David Gilbert (for Object Refinery Limited); 034 * 035 * $Id: SunJPEGEncoderAdapter.java,v 1.3.2.2 2005/11/01 16:37:01 mungady Exp $ 036 * 037 * Changes 038 * ------- 039 * 01-Aug-2004 : Initial version (RA); 040 * 01-Nov-2005 : To remove the dependency on non-supported APIs, use ImageIO 041 * instead of com.sun.image.codec.jpeg.JPEGImageEncoder - this 042 * adapter will only be available on JDK 1.4 or later (DG); 043 * 044 */ 045 046 package org.jfree.chart.encoders; 047 048 import java.awt.image.BufferedImage; 049 import java.io.ByteArrayOutputStream; 050 import java.io.IOException; 051 import java.io.OutputStream; 052 053 import javax.imageio.ImageIO; 054 055 /** 056 * Adapter class for the Sun JPEG Encoder. The ImageEncoderFactory will only 057 * return a reference to this class by default if the library has been compiled 058 * under a JDK 1.4+ and is being run using a JDK 1.4+. 059 * 060 * @author Richard Atkinson 061 */ 062 public class SunJPEGEncoderAdapter implements ImageEncoder { 063 064 private float quality = 0.75f; 065 066 /** 067 * Default constructor. 068 */ 069 public SunJPEGEncoderAdapter() { 070 } 071 072 /** 073 * Get the quality of the image encoding. 074 * 075 * @return A float representing the quality. 076 */ 077 public float getQuality() { 078 return this.quality; 079 } 080 081 /** 082 * Set the quality of the image encoding (ignored). 083 * 084 * @param quality A float representing the quality. 085 */ 086 public void setQuality(float quality) { 087 this.quality = quality; 088 } 089 090 /** 091 * Get whether the encoder encodes alpha transparency (always false). 092 * 093 * @return Whether the encoder is encoding alpha transparency. 094 */ 095 public boolean isEncodingAlpha() { 096 return false; 097 } 098 099 /** 100 * Set whether the encoder should encode alpha transparency (not supported 101 * for JPEG). 102 * 103 * @param encodingAlpha Whether the encoder should encode alpha 104 * transparency. 105 */ 106 public void setEncodingAlpha(boolean encodingAlpha) { 107 // No op 108 } 109 110 /** 111 * Encodes an image in JPEG format. 112 * 113 * @param bufferedImage The image to be encoded. 114 * 115 * @return The byte[] that is the encoded image. 116 * 117 * @throws IOException 118 */ 119 public byte[] encode(BufferedImage bufferedImage) throws IOException { 120 ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); 121 encode(bufferedImage, outputStream); 122 return outputStream.toByteArray(); 123 } 124 125 /** 126 * Encodes an image in JPEG format and writes it to an OutputStream. 127 * 128 * @param bufferedImage The image to be encoded. 129 * @param outputStream The OutputStream to write the encoded image to. 130 * @throws IOException 131 */ 132 public void encode(BufferedImage bufferedImage, OutputStream outputStream) 133 throws IOException { 134 if (bufferedImage == null) { 135 throw new IllegalArgumentException("Null 'image' argument."); 136 } 137 if (outputStream == null) { 138 throw new IllegalArgumentException("Null 'outputStream' argument."); 139 } 140 ImageIO.write(bufferedImage, ImageFormat.JPEG, outputStream); 141 } 142 143 }