/*
* $RCSfile: MlibBinarizeRIF.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.DataBuffer;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.renderable.RenderedImageFactory;
import java.awt.image.renderable.ParameterBlock;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.media.jai.opimage.RIFUtil;
/**
* A <code>RIF</code> supporting the "Binarize" operation in the
* rendered image mode using MediaLib.
*
* @see com.lightcrafts.mediax.jai.operator.BinarizeDescriptor
*/
public class MlibBinarizeRIF implements RenderedImageFactory {
/** Constructor. */
public MlibBinarizeRIF() {}
/**
* Creates a new instance of <code>MlibBinarizeOpImage</code> in
* the rendered image mode.
*
* @param args The source image, thresh value
* @param hints May contain rendering hints and destination image layout.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
// Get the source and its SampleModel.
RenderedImage source = args.getRenderedSource(0);
SampleModel sm = source.getSampleModel();
// Check that the source is single-banded and mediaLib compatible.
// Ignore the layout because if it doesn't specify a bilevel image
// then MlibBinarizeOpImage will revise it.
if (!MediaLibAccessor.isMediaLibCompatible(args) ||
sm.getNumBands() > 1) {
return null;
}
// Get the threshold value.
double thresh = args.getDoubleParameter(0);
// java set all 0's or 1's fast
if ((thresh > 255|| thresh <=0) && sm.getDataType()== DataBuffer.TYPE_BYTE ||
(thresh > Short.MAX_VALUE|| thresh <=0) && sm.getDataType()== DataBuffer.TYPE_SHORT||
(thresh > Integer.MAX_VALUE|| thresh <=0) && sm.getDataType()== DataBuffer.TYPE_INT)
return null;
// Get ImageLayout from RenderingHints.
ImageLayout layout = RIFUtil.getImageLayoutHint(hints);
return new MlibBinarizeOpImage(source,
layout,
hints,
thresh);
}
}