1 /* 2 * Copyright (c) 2005, 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.gif; 27 28 import java.awt.image.ColorModel; 29 import java.awt.image.SampleModel; 30 import java.util.Locale; 31 import javax.imageio.ImageTypeSpecifier; 32 import javax.imageio.ImageWriter; 33 import javax.imageio.spi.ImageWriterSpi; 34 import javax.imageio.stream.ImageOutputStream; 35 import com.sun.imageio.plugins.common.PaletteBuilder; 36 37 public class GIFImageWriterSpi extends ImageWriterSpi { 38 39 private static final String vendorName = "Oracle Corporation"; 40 41 private static final String version = "1.0"; 42 43 private static final String[] names = { "gif", "GIF" }; 44 45 private static final String[] suffixes = { "gif" }; 46 47 private static final String[] MIMETypes = { "image/gif" }; 48 49 private static final String writerClassName = 50 "com.sun.imageio.plugins.gif.GIFImageWriter"; 51 52 private static final String[] readerSpiNames = { 53 "com.sun.imageio.plugins.gif.GIFImageReaderSpi" 54 }; 55 56 public GIFImageWriterSpi() { 57 super(vendorName, 58 version, 59 names, 60 suffixes, 61 MIMETypes, 62 writerClassName, 63 new Class[] { ImageOutputStream.class }, 64 readerSpiNames, 65 true, 66 GIFWritableStreamMetadata.NATIVE_FORMAT_NAME, 67 "com.sun.imageio.plugins.gif.GIFStreamMetadataFormat", 68 null, null, 69 true, 70 GIFWritableImageMetadata.NATIVE_FORMAT_NAME, 71 "com.sun.imageio.plugins.gif.GIFImageMetadataFormat", 72 null, null 73 ); 74 } 75 76 public boolean canEncodeImage(ImageTypeSpecifier type) { 77 if (type == null) { 78 throw new IllegalArgumentException("type == null!"); 79 } 80 81 SampleModel sm = type.getSampleModel(); 82 ColorModel cm = type.getColorModel(); 83 84 boolean canEncode = sm.getNumBands() == 1 && 85 sm.getSampleSize(0) <= 8 && 86 sm.getWidth() <= 65535 && 87 sm.getHeight() <= 65535 && 88 (cm == null || cm.getComponentSize()[0] <= 8); 89 90 if (canEncode) { 91 return true; 92 } else { 93 return PaletteBuilder.canCreatePalette(type); 94 } 95 } 96 97 public String getDescription(Locale locale) { 98 return "Standard GIF image writer"; 99 } 100 101 public ImageWriter createWriterInstance(Object extension) { 102 return new GIFImageWriter(this); 103 } 104 }