/*
* $RCSfile: MlibOrderedDitherRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:03 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.mlib;
import java.awt.RenderingHints;
import java.awt.image.DataBuffer;
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.ColorCube;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.mediax.jai.KernelJAI;
import com.lightcrafts.media.jai.opimage.RIFUtil;
import com.lightcrafts.media.jai.util.ImageUtil;
/**
* A <code>RIF</code> supporting the "OrderedDither" operation in the
* rendered image mode using mediaLib.
*
* @see com.lightcrafts.mediax.jai.operator.OrderedDitherDescriptor
* @see MlibOrderedDitherOpImage
*/
public class MlibOrderedDitherRIF implements RenderedImageFactory {
/** Constructor. */
public MlibOrderedDitherRIF() {}
/**
* Creates a new instance of <code>MlibOrderedDitherOpImage</code> in
* the rendered image mode.
*
* @param args The source image and lookup table.
* @param hints May contain rendering hints and destination image layout.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
// Get source and parameters.
RenderedImage source = args.getRenderedSource(0);
ColorCube colorMap =
(ColorCube)args.getObjectParameter(0);
KernelJAI[] ditherMask = (KernelJAI[])args.getObjectParameter(1);
// Check colorMap compatibility.
if(colorMap.getNumBands() != 1 &&
colorMap.getNumBands() != 3) {
// 1 or 3 band colorMaps only.
return null;
} else if(colorMap.getDataType() != DataBuffer.TYPE_BYTE) {
// byte colorMaps only
return null;
}
// Check source compatibility.
SampleModel sourceSM = source.getSampleModel();
if(sourceSM.getDataType() != DataBuffer.TYPE_BYTE) {
// byte source images only
return null;
} else if(sourceSM.getNumBands() != colorMap.getNumBands()) {
// band counts must match
return null;
}
// Get ImageLayout from RenderingHints if any.
ImageLayout layoutHint = RIFUtil.getImageLayoutHint(hints);
// Calculate the final ImageLayout.
ImageLayout layout =
MlibOrderedDitherOpImage.layoutHelper(layoutHint,
source, colorMap);
// Check for source and destination compatibility. The ColorModel
// is suppressed in the second test because it will be an
// IndexColorModel which would cause the test to fail.
SampleModel destSM = layout.getSampleModel(null);
if (!MediaLibAccessor.isMediaLibCompatible(args) ||
(!MediaLibAccessor.isMediaLibCompatible(destSM, null) &&
!ImageUtil.isBinary(destSM))) {
return null;
}
return new MlibOrderedDitherOpImage(source, hints, layout,
colorMap, ditherMask);
}
}