/*
* $RCSfile: FilteredSubsampleRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:27 $
* $State: Exp $
*/package com.lightcrafts.media.jai.opimage;
import java.awt.RenderingHints;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.renderable.RenderedImageFactory;
import java.awt.image.renderable.ParameterBlock;
import java.util.Map;
import com.lightcrafts.mediax.jai.BorderExtender;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.mediax.jai.Interpolation;
import com.lightcrafts.mediax.jai.InterpolationNearest;
import com.lightcrafts.mediax.jai.InterpolationBilinear;
import com.lightcrafts.mediax.jai.InterpolationBicubic;
import com.lightcrafts.mediax.jai.InterpolationBicubic2;
import com.lightcrafts.mediax.jai.JAI;
/**
* <p> Class implementing the RIF interface for the FilteredSubsample
* operator. An instance of this class should be registered with the
* OperationRegistry with operation name "FilteredSubsample."
*/
public class FilteredSubsampleRIF implements RenderedImageFactory {
/** <p> Default constructor (there is no input). */
public FilteredSubsampleRIF() {}
/**
* <p> Creates a new instance of SubsampleOpImage in the rendered layer.
* This method satisfies the implementation of RIF.
*
* @param paramBlock The source image, the X and Y scale factors.
* @param renderHints RenderingHints.
*/
public RenderedImage create(ParameterBlock paramBlock,
RenderingHints renderHints) {
RenderedImage source = paramBlock.getRenderedSource(0);
BorderExtender extender = renderHints == null ? null :
(BorderExtender)renderHints.get(JAI.KEY_BORDER_EXTENDER);
ImageLayout layout = renderHints == null ? null :
(ImageLayout)renderHints.get(JAI.KEY_IMAGE_LAYOUT);
int scaleX = paramBlock.getIntParameter(0);
int scaleY = paramBlock.getIntParameter(1);
float [] qsFilter = (float [])paramBlock.getObjectParameter(2);
Interpolation interp = (Interpolation)paramBlock.getObjectParameter(3);
// check if binary and interpolation type allowed
SampleModel sm = source.getSampleModel();
int dataType = sm.getDataType();
// Determine the interpolation type, if not supported throw exception
boolean validInterp = (interp instanceof InterpolationNearest) ||
(interp instanceof InterpolationBilinear) ||
(interp instanceof InterpolationBicubic) ||
(interp instanceof InterpolationBicubic2);
if (!validInterp)
throw new IllegalArgumentException(
JaiI18N.getString("FilteredSubsample3"));
return new FilteredSubsampleOpImage(source, extender, (Map)renderHints, layout,
scaleX, scaleY, qsFilter, interp);
} // create
} // FilteredSubsampleRIF