/*
* $RCSfile: MlibScaleRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:05 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.mlib;
import java.awt.RenderingHints;
import java.awt.image.DataBuffer;
import java.awt.image.MultiPixelPackedSampleModel;
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.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.InterpolationTable;
import com.lightcrafts.media.jai.opimage.RIFUtil;
import com.lightcrafts.media.jai.opimage.TranslateIntOpImage;
/**
* A <code>RIF</code> supporting the "Scale" operation in the
* rendered image mode using MediaLib.
*
* @see com.lightcrafts.mediax.jai.operator.ScaleDescriptor
* @see MlibScaleNearestOpImage
* @see MlibScaleBilinearOpImage
* @see MlibScaleBicubicOpImage
*
*/
public class MlibScaleRIF implements RenderedImageFactory {
private static final float TOLERANCE = 0.01F;
/** Constructor. */
public MlibScaleRIF() {}
/**
* Creates a new instance of <code>MlibScaleOpImage</code> in
* the rendered image mode.
*
* @param args The source image, scale factors,
* and the <code>Interpolation</code>.
* @param hints May contain rendering hints and destination image layout.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
/* Get ImageLayout and TileCache from RenderingHints. */
ImageLayout layout = RIFUtil.getImageLayoutHint(hints);
Interpolation interp = (Interpolation)args.getObjectParameter(4);
RenderedImage source = args.getRenderedSource(0);
if (!MediaLibAccessor.isMediaLibCompatible(args, layout) ||
!MediaLibAccessor.hasSameNumBands(args, layout) ||
// Medialib cannot deal with source image having tiles with any
// dimension greater than or equal to 32768
source.getTileWidth() >= 32768 ||
source.getTileHeight() >= 32768) {
return null;
}
SampleModel sm = source.getSampleModel();
boolean isBilevel = (sm instanceof MultiPixelPackedSampleModel) &&
(sm.getSampleSize(0) == 1) &&
(sm.getDataType() == DataBuffer.TYPE_BYTE ||
sm.getDataType() == DataBuffer.TYPE_USHORT ||
sm.getDataType() == DataBuffer.TYPE_INT);
if (isBilevel) {
// Let Java code handle it, reformatting is slower
return null;
}
// Get BorderExtender from hints if any.
BorderExtender extender = RIFUtil.getBorderExtenderHint(hints);
float xScale = args.getFloatParameter(0);
float yScale = args.getFloatParameter(1);
float xTrans = args.getFloatParameter(2);
float yTrans = args.getFloatParameter(3);
// Check and see if we are scaling by 1.0 in both x and y and no
// translations. If so call the copy operation.
if (xScale == 1.0F && yScale == 1.0F &&
xTrans == 0.0F && yTrans == 0.0F) {
return new MlibCopyOpImage(source, hints, layout);
}
// Check to see whether the operation specified is a pure
// integer translation. If so call translate
if (xScale == 1.0F && yScale == 1.0F &&
(Math.abs(xTrans - (int)xTrans) < TOLERANCE) &&
(Math.abs(yTrans - (int)yTrans) < TOLERANCE) &&
layout == null) { // TranslateIntOpImage can't deal with ImageLayout hint
/* It's a integer translate. */
return new TranslateIntOpImage(source,
hints,
(int)xTrans,
(int)yTrans);
}
if (interp instanceof InterpolationNearest) {
return new MlibScaleNearestOpImage(source, extender,
hints, layout,
xScale, yScale,
xTrans, yTrans,
interp);
} else if (interp instanceof InterpolationBilinear) {
return new MlibScaleBilinearOpImage(source,
extender, hints, layout,
xScale, yScale,
xTrans, yTrans,
interp);
} else if (interp instanceof InterpolationBicubic ||
interp instanceof InterpolationBicubic2) {
return new MlibScaleBicubicOpImage(source,
extender, hints, layout,
xScale, yScale,
xTrans, yTrans,
interp);
} else if (interp instanceof InterpolationTable) {
return new MlibScaleTableOpImage(source, extender, hints, layout,
xScale, yScale,
xTrans, yTrans,
interp);
} else {
/* Other kinds of interpolation cannot be handled via mlib. */
return null;
}
}
}