/*
* $RCSfile: MlibBandSelectRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:55:51 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.mlib;
import java.awt.RenderingHints;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.ParameterBlock;
import java.awt.image.renderable.RenderedImageFactory;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.media.jai.opimage.RIFUtil;
/**
* A <code>RIF</code> supporting the "BandSelect" operation in the
* rendered image mode using MediaLib.
*
* @see com.lightcrafts.mediax.jai.operator.BandSelectDescriptor
* @see MlibBandSelectOpImage
*
*/
public class MlibBandSelectRIF implements RenderedImageFactory {
/** Constructor. */
public MlibBandSelectRIF() {}
/**
* Creates a new instance of <code>MlibBandSelectOpImage</code> in
* the rendered image mode.
*
* @param args The source image and the band indices.
* @param hints May contain rendering hints and destination image layout.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
// Get ImageLayout and TileCache from RenderingHints.
ImageLayout layout = RIFUtil.getImageLayoutHint(hints);
if (!MediaLibAccessor.isMediaLibCompatible(args, layout)) {
return null;
}
int[] bandIndices = (int[])args.getObjectParameter(0);
// If the band selection is not monotonically increasing
// fall back to Java code as mediaLib does not support this.
for(int i = 1; i < bandIndices.length; i++) {
if(bandIndices[i] <= bandIndices[i-1]) {
return null;
}
}
return new MlibBandSelectOpImage(args.getRenderedSource(0),
hints, layout,
bandIndices);
}
}