/*
* $RCSfile: CompositeCRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:18 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.opimage;
import java.awt.RenderingHints;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.ParameterBlock;
import java.awt.image.renderable.RenderableImage;
import java.awt.image.renderable.RenderContext;
import com.lightcrafts.mediax.jai.CRIFImpl;
import com.lightcrafts.mediax.jai.EnumeratedParameter;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.mediax.jai.JAI;
import com.lightcrafts.mediax.jai.operator.CompositeDescriptor;
/**
* A <code>CRIF</code> supporting the "Composite" operation in the
* rendered and renderable image modes.
*
* @see com.lightcrafts.mediax.jai.operator.CompositeDescriptor
* @see CompositeOpImage
* @see CompositeNoAlphaOpImage
*
*/
public class CompositeCRIF extends CRIFImpl {
/** Constructor. */
public CompositeCRIF() {
super("composite");
}
/**
* Creates a new instance of <code>CompositeOpImage</code>
* in the rendered layer. This method satisfies the
* implementation of RIF.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
/* Get ImageLayout from RenderingHints if any. */
ImageLayout layout = RIFUtil.getImageLayoutHint(hints);
RenderedImage source1 = args.getRenderedSource(0);
RenderedImage source2 = args.getRenderedSource(1);
RenderedImage alpha1 = (RenderedImage)args.getObjectParameter(0);
RenderedImage alpha2 = null;
if(args.getObjectParameter(1) != null) {
alpha2 = (RenderedImage)args.getObjectParameter(1);
}
boolean premultiplied =
((Boolean)args.getObjectParameter(2)).booleanValue();
EnumeratedParameter destAlpha =
(EnumeratedParameter)args.getObjectParameter(3);
if (destAlpha.equals(CompositeDescriptor.NO_DESTINATION_ALPHA)) {
return new CompositeNoDestAlphaOpImage(source1, source2,
hints, layout,
alpha1, alpha2,
premultiplied);
} else {
return new CompositeOpImage(source1, source2,
hints, layout,
alpha1, alpha2,
premultiplied,
destAlpha.equals(CompositeDescriptor.DESTINATION_ALPHA_FIRST));
}
}
/**
* Creates a <Code>RenderedImage</Code> from the renderable layer.
*
* @param renderContext The rendering information associated with
* this rendering.
* @param paramBlock The parameters used to create the image.
* @return A <code>RenderedImage</code>.
*/
public RenderedImage create(RenderContext renderContext,
ParameterBlock paramBlock) {
// Get the two renderable alpha images from the parameter block
RenderableImage alphaImage1 =
(RenderableImage)paramBlock.getObjectParameter(0);
RenderableImage alphaImage2 =
(RenderableImage)paramBlock.getObjectParameter(1);
// Cause the two renderable alpha images to be rendered
RenderedImage rAlphaImage1 =
alphaImage1.createRendering(renderContext);
RenderedImage rAlphaImage2 =
alphaImage2.createRendering(renderContext);
ParameterBlock newPB = (ParameterBlock)paramBlock.clone();
// Replace the renderable alpha images in the ParameterBlock with
// their renderings
newPB.set(rAlphaImage1, 0);
newPB.set(rAlphaImage2, 1);
// Return JAI.create("composite")
return JAI.create("composite", newPB,
renderContext.getRenderingHints());
}
}