/*
* $RCSfile: MlibMeanRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:55:59 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.mlib;
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;
/**
* A <code>RIF</code> supporting the "Mean" operation in the
* rendered image mode using MediaLib.
*
* @see com.lightcrafts.mediax.jai.operator.MeanDescriptor
* @see MlibMeanOpImage
*
* @since EA3
*
*/
public class MlibMeanRIF implements RenderedImageFactory {
/** Constructor. */
public MlibMeanRIF() {}
/**
* Creates a new instance of <code>MlibMeanOpImage</code> in
* the rendered image mode.
*
* @param args The source image and the parameters.
* @param hints Rendering hints are ignored.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
if (!MediaLibAccessor.isMediaLibCompatible(args)) {
return null;
}
RenderedImage source = args.getRenderedSource(0);
ROI roi = (ROI)args.getObjectParameter(0);
int xPeriod = args.getIntParameter(1);
int yPeriod = args.getIntParameter(2);
int xStart = source.getMinX(); // default values
int yStart = source.getMinY();
int maxWidth = source.getWidth();
int maxHeight = source.getHeight();
if (roi != null &&
!roi.contains(xStart, yStart, maxWidth, maxHeight)) {
return null;
}
// mediaLib supports only a sampling period of 1
if ((xPeriod != 1) || (yPeriod != 1)) {
return null;
}
return new MlibMeanOpImage(source,
roi,
xStart, yStart,
xPeriod, yPeriod);
}
}