/*
* $RCSfile: MlibCompositeRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:55:52 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.mlib;
import java.awt.RenderingHints;
import java.awt.image.ComponentSampleModel;
import java.awt.image.ComponentColorModel;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.renderable.ParameterBlock;
import java.awt.image.renderable.RenderedImageFactory;
import com.lightcrafts.mediax.jai.EnumeratedParameter;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.mediax.jai.operator.CompositeDescriptor;
import com.lightcrafts.media.jai.opimage.RIFUtil;
/**
* A <code>RIF</code> supporting the "Composite" operation in the
* rendered image mode using MediaLib.
*
* @see com.lightcrafts.mediax.jai.operator.CompositeDescriptor
* @see MlibCompositeOpImage
*
* @since 1.0
*
*/
public class MlibCompositeRIF implements RenderedImageFactory {
/** Constructor. */
public MlibCompositeRIF() {}
/**
* Creates a new instance of <code>MlibCompositeOpImage</code> in
* the rendered image mode.
*
* @param args The source images.
* @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) ||
!MediaLibAccessor.hasSameNumBands(args, layout)) {
return null;
}
RenderedImage alpha1 = (RenderedImage)args.getObjectParameter(0);
Object alpha2 = args.getObjectParameter(1);
boolean premultiplied =
((Boolean)args.getObjectParameter(2)).booleanValue();
EnumeratedParameter destAlpha =
(EnumeratedParameter)args.getObjectParameter(3);
SampleModel sm = alpha1.getSampleModel();
if (!(sm instanceof ComponentSampleModel) ||
sm.getNumBands() != 1 ||
!(alpha1.getColorModel() instanceof ComponentColorModel) ||
alpha2 != null ||
premultiplied ||
!(destAlpha.equals(CompositeDescriptor.NO_DESTINATION_ALPHA))) {
return null;
}
return new MlibCompositeOpImage(args.getRenderedSource(0),
args.getRenderedSource(1),
hints, layout,
alpha1);
}
}