/*
* File : $Source: /alkacon/cvs/AlkaconSimapi/src/com/alkacon/simapi/util/GifImageWriter.java,v $
* Date : $Date: 2007/11/20 15:59:13 $
* Version: $Revision: 1.3 $
*
* Copyright (c) 2007 Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software GmbH, please see the
* company website: http://www.alkacon.com
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.alkacon.simapi.GifWriter;
import java.awt.image.BufferedImage;
import java.awt.image.IndexColorModel;
import java.awt.image.RenderedImage;
import java.io.IOException;
import javax.imageio.IIOImage;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.stream.ImageOutputStream;
/**
* Implements the GIF image writer.<p>
*
* @author Alexander Kandzior
*/
public class GifImageWriter extends ImageWriter {
/**
* Public constructor.<p>
*
* @param provider the originating provider
*/
public GifImageWriter(GifImageWriterSpi provider) {
super(provider);
}
/**
* @see javax.imageio.ImageTranscoder#convertImageMetadata(javax.imageio.metadata.IIOMetadata, javax.imageio.ImageTypeSpecifier, javax.imageio.ImageWriteParam)
*/
public IIOMetadata convertImageMetadata(IIOMetadata inData, ImageTypeSpecifier imageType, ImageWriteParam param) {
return null;
}
/**
* @see javax.imageio.ImageTranscoder#convertStreamMetadata(javax.imageio.metadata.IIOMetadata, javax.imageio.ImageWriteParam)
*/
public IIOMetadata convertStreamMetadata(IIOMetadata inData, ImageWriteParam param) {
return null;
}
/**
* @see javax.imageio.ImageWriter#getDefaultImageMetadata(javax.imageio.ImageTypeSpecifier, javax.imageio.ImageWriteParam)
*/
public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType, ImageWriteParam param) {
return null;
}
/**
* @see javax.imageio.ImageWriter#getDefaultStreamMetadata(javax.imageio.ImageWriteParam)
*/
public IIOMetadata getDefaultStreamMetadata(ImageWriteParam param) {
return null;
}
/**
* @see javax.imageio.ImageWriter#write(javax.imageio.metadata.IIOMetadata, javax.imageio.IIOImage, javax.imageio.ImageWriteParam)
*/
public void write(IIOMetadata streamMetadata, IIOImage image, ImageWriteParam param) throws IOException {
if (image == null) {
throw new IllegalArgumentException("image == null");
}
if (image.hasRaster()) {
throw new UnsupportedOperationException("Cannot write rasters");
}
output = getOutput();
if (output == null) {
throw new IllegalStateException("output was not set");
}
if (param == null) {
param = getDefaultWriteParam();
}
ImageOutputStream ios = (ImageOutputStream)output;
RenderedImage ri = image.getRenderedImage();
if (ri instanceof BufferedImage) {
BufferedImage bi = (BufferedImage)ri;
BufferedImage indexed;
if (!(bi.getColorModel() instanceof IndexColorModel)) {
indexed = Quantize.process(bi, 256, true);
} else {
indexed = bi;
}
GifAcmeEncoder encoder = new GifAcmeEncoder(indexed);
encoder.write(ios);
} else {
throw new IOException("Image not of type BufferedImage");
}
}
}