1 /* 2 * Copyright (c) 2000, 2004, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.imageio.plugins.jpeg; 27 28 import javax.imageio.spi.ImageWriterSpi; 29 import javax.imageio.spi.ServiceRegistry; 30 import javax.imageio.spi.IIORegistry; 31 import javax.imageio.stream.ImageOutputStream; 32 import javax.imageio.ImageWriter; 33 import javax.imageio.ImageTypeSpecifier; 34 import javax.imageio.IIOException; 35 36 import java.awt.image.ColorModel; 37 import java.awt.image.IndexColorModel; 38 import java.awt.image.SampleModel; 39 import java.util.Locale; 40 41 public class JPEGImageWriterSpi extends ImageWriterSpi { 42 43 private static String [] readerSpiNames = 44 {"com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi"}; 45 46 public JPEGImageWriterSpi() { 47 super(JPEG.vendor, 48 JPEG.version, 49 JPEG.names, 50 JPEG.suffixes, 51 JPEG.MIMETypes, 52 "com.sun.imageio.plugins.jpeg.JPEGImageWriter", 53 new Class[] { ImageOutputStream.class }, 54 readerSpiNames, 55 true, 56 JPEG.nativeStreamMetadataFormatName, 57 JPEG.nativeStreamMetadataFormatClassName, 58 null, null, 59 true, 60 JPEG.nativeImageMetadataFormatName, 61 JPEG.nativeImageMetadataFormatClassName, 62 null, null 63 ); 64 } 65 66 public String getDescription(Locale locale) { 67 return "Standard JPEG Image Writer"; 68 } 69 70 public boolean isFormatLossless() { 71 return false; 72 } 73 74 public boolean canEncodeImage(ImageTypeSpecifier type) { 75 SampleModel sampleModel = type.getSampleModel(); 76 77 // Find the maximum bit depth across all channels 78 int[] sampleSize = sampleModel.getSampleSize(); 79 int bitDepth = sampleSize[0]; 80 for (int i = 1; i < sampleSize.length; i++) { 81 if (sampleSize[i] > bitDepth) { 82 bitDepth = sampleSize[i]; 83 } 84 } 85 86 // 4450894: Ensure bitDepth is between 1 and 8 87 if (bitDepth < 1 || bitDepth > 8) { 88 return false; 89 } 90 91 return true; 92 } 93 94 public ImageWriter createWriterInstance(Object extension) 95 throws IIOException { 96 return new JPEGImageWriter(this); 97 } 98 }