001: /*
002: * $RCSfile: GIFImageWriterSpi.java,v $
003: *
004: *
005: * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * - Redistribution of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: *
014: * - Redistribution in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * Neither the name of Sun Microsystems, Inc. or the names of
020: * contributors may be used to endorse or promote products derived
021: * from this software without specific prior written permission.
022: *
023: * This software is provided "AS IS," without a warranty of any
024: * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
025: * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
026: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027: * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
028: * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
029: * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030: * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
031: * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032: * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033: * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034: * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035: * POSSIBILITY OF SUCH DAMAGES.
036: *
037: * You acknowledge that this software is not designed or intended for
038: * use in the design, construction, operation or maintenance of any
039: * nuclear facility.
040: *
041: * $Revision: 1.3 $
042: * $Date: 2006/03/31 19:43:39 $
043: * $State: Exp $
044: */
045:
046: package com.sun.media.imageioimpl.plugins.gif;
047:
048: import java.awt.image.ColorModel;
049: import java.awt.image.SampleModel;
050: import java.util.Locale;
051: import javax.imageio.ImageTypeSpecifier;
052: import javax.imageio.ImageWriter;
053: import javax.imageio.spi.ImageWriterSpi;
054: import javax.imageio.spi.ServiceRegistry;
055: import com.sun.media.imageioimpl.common.PaletteBuilder;
056: import com.sun.media.imageioimpl.common.ImageUtil;
057: import com.sun.media.imageioimpl.common.PackageUtil;
058:
059: public class GIFImageWriterSpi extends ImageWriterSpi {
060:
061: private static final String vendorName = "Sun Microsystems, Inc.";
062:
063: private static final String version = "1.0";
064:
065: private static final String[] names = { "gif", "GIF" };
066:
067: private static final String[] suffixes = { "gif" };
068:
069: private static final String[] MIMETypes = { "image/gif" };
070:
071: private static final String writerClassName = "com.sun.media.imageioimpl.plugins.gif.GIFImageWriter";
072:
073: private static final String[] readerSpiNames = { "com.sun.imageio.plugins.gif.GIFImageReaderSpi" };
074:
075: private boolean registered = false;
076:
077: public GIFImageWriterSpi() {
078: super (
079: vendorName,
080: version,
081: names,
082: suffixes,
083: MIMETypes,
084: writerClassName,
085: STANDARD_OUTPUT_TYPE,
086: readerSpiNames,
087: true,
088: GIFWritableStreamMetadata.NATIVE_FORMAT_NAME,
089: "com.sun.media.imageioimpl.plugins.gif.GIFStreamMetadataFormat",
090: null,
091: null,
092: true,
093: GIFWritableImageMetadata.NATIVE_FORMAT_NAME,
094: "com.sun.media.imageioimpl.plugins.gif.GIFStreamMetadataFormat",
095: null, null);
096: }
097:
098: public boolean canEncodeImage(ImageTypeSpecifier type) {
099: if (type == null) {
100: throw new IllegalArgumentException("type == null!");
101: }
102:
103: SampleModel sm = type.getSampleModel();
104: ColorModel cm = type.getColorModel();
105:
106: boolean canEncode = sm.getNumBands() == 1
107: && sm.getSampleSize(0) <= 8 && sm.getWidth() <= 65535
108: && sm.getHeight() <= 65535
109: && (cm == null || cm.getComponentSize()[0] <= 8);
110:
111: if (canEncode) {
112: return true;
113: } else {
114: return PaletteBuilder.canCreatePalette(type);
115: }
116: }
117:
118: public String getDescription(Locale locale) {
119: String desc = PackageUtil.getSpecificationTitle()
120: + " GIF Image Writer";
121: return desc;
122: }
123:
124: public void onRegistration(ServiceRegistry registry, Class category) {
125: if (registered) {
126: return;
127: }
128:
129: registered = true;
130:
131: // By JDK 1.8, the GIFImageWriter will have been in JDK core for
132: // atleast two FCS releases, so we can set JIIO's to lower priority
133: // With JDK 1.9, we can entirely de-register the JIIO one
134: ImageUtil.processOnRegistration(registry, category, "GIF",
135: this , 9, 8); // JDK version 1.9, 1.8
136: }
137:
138: public ImageWriter createWriterInstance(Object extension) {
139: return new GIFImageWriter(this);
140: }
141: }
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