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/*
* $RCSfile: GIFImageWriterSpi.java,v $
*
*
* Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.3 $
* $Date: 2006/03/31 19:43:39 $
* $State: Exp $
*/
package com.github.jaiimageio.impl.plugins.gif;
import java.awt.image.ColorModel;
import java.awt.image.SampleModel;
import java.util.Locale;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriter;
import javax.imageio.spi.ImageWriterSpi;
import javax.imageio.spi.ServiceRegistry;
import com.github.jaiimageio.impl.common.ImageUtil;
import com.github.jaiimageio.impl.common.PackageUtil;
import com.github.jaiimageio.impl.common.PaletteBuilder;
public class GIFImageWriterSpi extends ImageWriterSpi {
private static final String vendorName = "Sun Microsystems, Inc.";
private static final String version = "1.0";
private static final String[] names = { "gif", "GIF" };
private static final String[] suffixes = { "gif" };
private static final String[] MIMETypes = { "image/gif" };
private static final String writerClassName =
"com.github.jaiimageio.impl.plugins.gif.GIFImageWriter";
private static final String[] readerSpiNames = {
"com.sun.imageio.plugins.gif.GIFImageReaderSpi"
};
private boolean registered = false;
public GIFImageWriterSpi() {
super(vendorName,
version,
names,
suffixes,
MIMETypes,
writerClassName,
STANDARD_OUTPUT_TYPE,
readerSpiNames,
true,
GIFWritableStreamMetadata.NATIVE_FORMAT_NAME,
"com.github.jaiimageio.impl.plugins.gif.GIFStreamMetadataFormat",
null, null,
true,
GIFWritableImageMetadata.NATIVE_FORMAT_NAME,
"com.github.jaiimageio.impl.plugins.gif.GIFStreamMetadataFormat",
null, null
);
}
public boolean canEncodeImage(ImageTypeSpecifier type) {
if (type == null) {
throw new IllegalArgumentException("type == null!");
}
SampleModel sm = type.getSampleModel();
ColorModel cm = type.getColorModel();
boolean canEncode = sm.getNumBands() == 1 &&
sm.getSampleSize(0) <= 8 &&
sm.getWidth() <= 65535 &&
sm.getHeight() <= 65535 &&
(cm == null || cm.getComponentSize()[0] <= 8);
if (canEncode) {
return true;
} else {
return PaletteBuilder.canCreatePalette(type);
}
}
public String getDescription(Locale locale) {
String desc = PackageUtil.getSpecificationTitle() +
" GIF Image Writer";
return desc;
}
public void onRegistration(ServiceRegistry registry,
Class category) {
if (registered) {
return;
}
registered = true;
// By JDK 1.8, the GIFImageWriter will have been in JDK core for
// atleast two FCS releases, so we can set JIIO's to lower priority
// With JDK 1.9, we can entirely de-register the JIIO one
ImageUtil.processOnRegistration(registry, category, "GIF", this,
9, 8); // JDK version 1.9, 1.8
}
public ImageWriter createWriterInstance(Object extension) {
return new GIFImageWriter(this);
}
}