/*
* $RCSfile: DivideByConstCRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:23 $
* $State: Exp $
*/
package com.sun.media.jai.opimage;
import java.awt.RenderingHints;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.ParameterBlock;
import javax.media.jai.CRIFImpl;
import javax.media.jai.ImageLayout;
import java.util.Map;
/**
* A <code>CRIF</code> supporting the "DivideByConst" operation in the rendered
* and renderable image layers.
*
* @see javax.media.jai.operator.DivideByConstDescriptor
* @see MultiplyConstOpImage
*
*
* @since EA2
*/
public class DivideByConstCRIF extends CRIFImpl {
/** Constructor. */
public DivideByConstCRIF() {
super("dividebyconst");
}
/**
* Creates a new instance of <code>DivideByConstOpImage</code> in the
* rendered layer.
*
* @param args The source image and the constants.
* @param hints Optionally contains destination image layout.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints renderHints) {
// Get ImageLayout from renderHints if any.
ImageLayout layout = RIFUtil.getImageLayoutHint(renderHints);
/* Invert the constants. */
double[] constants = (double[])args.getObjectParameter(0);
int length = constants.length;
double[] invConstants = new double[length];
for (int i = 0; i < length; i++) {
invConstants[i] = 1.0 / constants[i];
}
return new MultiplyConstOpImage(args.getRenderedSource(0),
renderHints,
layout,
invConstants);
}
}