/*
* $RCSfile: HistogramRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:28 $
* $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.RenderedImageFactory;
import com.lightcrafts.mediax.jai.ROI;
import com.lightcrafts.mediax.jai.util.ImagingListener;
import com.lightcrafts.media.jai.util.ImageUtil;
/**
* A <code>RIF</code> supporting the "Histogram" operation in the
* rendered image layer.
*
* @since EA2
* @see com.lightcrafts.mediax.jai.operator.HistogramDescriptor
* @see HistogramOpImage
*
*/
public class HistogramRIF implements RenderedImageFactory {
/** Constructor. */
public HistogramRIF() {}
/**
* Creates a new instance of <code>HistogramOpImage</code>
* in the rendered layer. Any image layout information in
* <code>RenderingHints</code> is ignored.
* This method satisfies the implementation of RIF.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
RenderedImage src = args.getRenderedSource(0);
int xStart = src.getMinX(); // default values
int yStart = src.getMinY();
int maxWidth = src.getWidth();
int maxHeight = src.getHeight();
ROI roi = (ROI)args.getObjectParameter(0);
int xPeriod = args.getIntParameter(1);
int yPeriod = args.getIntParameter(2);
int[] numBins = (int[])args.getObjectParameter(3);
double[] lowValue = (double[])args.getObjectParameter(4);
double[] highValue = (double[])args.getObjectParameter(5);
HistogramOpImage op = null;
try {
op = new HistogramOpImage(src,
roi,
xStart, yStart,
xPeriod, yPeriod,
numBins, lowValue, highValue);
} catch (Exception e) {
ImagingListener listener = ImageUtil.getImagingListener(hints);
String message = JaiI18N.getString("HistogramRIF0");
listener.errorOccurred(message, e, this, false);
}
return op;
}
}