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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ------------------------- 28: * SunPNGEncoderAdapter.java 29: * ------------------------- 30: * (C) Copyright 2004, 2007, by Richard Atkinson and Contributors. 31: * 32: * Original Author: Richard Atkinson; 33: * Contributor(s): -; 34: * 35: * Changes 36: * ------- 37: * 01-Aug-2004 : Initial version (RA); 38: * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG); 39: * 40: */ 41: 42: package org.jfree.chart.encoders; 43: 44: import java.awt.image.BufferedImage; 45: import java.io.ByteArrayOutputStream; 46: import java.io.IOException; 47: import java.io.OutputStream; 48: 49: import javax.imageio.ImageIO; 50: 51: /** 52: * Adapter class for the Sun PNG Encoder. The ImageEncoderFactory will only 53: * return a reference to this class by default if the library has been compiled 54: * under a JDK 1.4+ and is being run using a JDK 1.4+. 55: */ 56: public class SunPNGEncoderAdapter implements ImageEncoder { 57: 58: /** 59: * Get the quality of the image encoding (always 0.0). 60: * 61: * @return A float representing the quality. 62: */ 63: public float getQuality() { 64: return 0.0f; 65: } 66: 67: /** 68: * Set the quality of the image encoding (not supported in this 69: * ImageEncoder). 70: * 71: * @param quality A float representing the quality. 72: */ 73: public void setQuality(float quality) { 74: // No op 75: } 76: 77: /** 78: * Get whether the encoder should encode alpha transparency (always false). 79: * 80: * @return Whether the encoder is encoding alpha transparency. 81: */ 82: public boolean isEncodingAlpha() { 83: return false; 84: } 85: 86: /** 87: * Set whether the encoder should encode alpha transparency (not 88: * supported in this ImageEncoder). 89: * 90: * @param encodingAlpha Whether the encoder should encode alpha 91: * transparency. 92: */ 93: public void setEncodingAlpha(boolean encodingAlpha) { 94: // No op 95: } 96: 97: /** 98: * Encodes an image in PNG format. 99: * 100: * @param bufferedImage The image to be encoded. 101: * 102: * @return The byte[] that is the encoded image. 103: * 104: * @throws IOException 105: */ 106: public byte[] encode(BufferedImage bufferedImage) throws IOException { 107: ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); 108: encode(bufferedImage, outputStream); 109: return outputStream.toByteArray(); 110: } 111: 112: /** 113: * Encodes an image in PNG format and writes it to an OutputStream. 114: * 115: * @param bufferedImage The image to be encoded. 116: * @param outputStream The OutputStream to write the encoded image to. 117: * @throws IOException 118: */ 119: public void encode(BufferedImage bufferedImage, OutputStream outputStream) 120: throws IOException { 121: if (bufferedImage == null) { 122: throw new IllegalArgumentException("Null 'image' argument."); 123: } 124: if (outputStream == null) { 125: throw new IllegalArgumentException("Null 'outputStream' argument."); 126: } 127: ImageIO.write(bufferedImage, ImageFormat.PNG, outputStream); 128: } 129: 130: }