/*
* $RCSfile: ColorQuantizerRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:17 $
* $State: Exp $
*/package com.lightcrafts.media.jai.opimage;
import java.awt.RenderingHints;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.DataBuffer;
import java.awt.image.renderable.RenderedImageFactory;
import java.awt.image.renderable.ParameterBlock;
import java.util.Map;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.mediax.jai.JAI;
import com.lightcrafts.mediax.jai.ROI;
import com.lightcrafts.mediax.jai.operator.ColorQuantizerDescriptor;
import com.lightcrafts.mediax.jai.operator.ColorQuantizerType;
/**
* <p> Class implementing the RIF interface for the ColorQuantizer
* operator. An instance of this class should be registered with the
* OperationRegistry with operation name "ColorQuantizer."
*/
public class ColorQuantizerRIF implements RenderedImageFactory {
/** <p> Default constructor (there is no input). */
public ColorQuantizerRIF() {}
/**
* <p> Creates a new instance of ColorQuantizerOpImage in the
* rendered layer. This method satisfies the implementation of RIF.
*
* @param paramBlock The source image, the color quantization algorithm
* name, the maximum number of colors, the
* parameter for training (the histogram size for
* median-cut, the cycle for neuquant, and maximum tree
* size for oct-tree), and the ROI.
* @param renderHints RenderingHints.
*/
public RenderedImage create(ParameterBlock paramBlock,
RenderingHints renderHints) {
RenderedImage source = paramBlock.getRenderedSource(0);
ImageLayout layout = renderHints == null ? null :
(ImageLayout)renderHints.get(JAI.KEY_IMAGE_LAYOUT);
ColorQuantizerType algorithm =
(ColorQuantizerType)paramBlock.getObjectParameter(0);
int maxColorNum = paramBlock.getIntParameter(1);
int upperBound = paramBlock.getIntParameter(2);
ROI roi= (ROI)paramBlock.getObjectParameter(3);
int xPeriod = paramBlock.getIntParameter(4);
int yPeriod = paramBlock.getIntParameter(5);
// check if 3-band byte-type image
SampleModel sm = source.getSampleModel();
if (sm.getNumBands() != 3 && sm.getDataType() == DataBuffer.TYPE_BYTE)
throw new IllegalArgumentException("ColorQuantizerRIF0");
if (algorithm.equals(ColorQuantizerDescriptor.NEUQUANT))
return new NeuQuantOpImage(source, (Map)renderHints, layout,
maxColorNum, upperBound, roi,
xPeriod, yPeriod);
if (algorithm.equals(ColorQuantizerDescriptor.OCTTREE))
return new OctTreeOpImage(source, (Map)renderHints, layout,
maxColorNum, upperBound, roi,
xPeriod, yPeriod);
else
return new MedianCutOpImage(source, (Map)renderHints, layout,
maxColorNum, upperBound, roi,
xPeriod, yPeriod);
} // create
} // ColorQuantizerRIF