/*
* $RCSfile: MlibDilateRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:55:54 $
* $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.BorderExtender;
import com.lightcrafts.mediax.jai.ImageLayout;
import com.lightcrafts.mediax.jai.KernelJAI;
import com.lightcrafts.media.jai.opimage.RIFUtil;
/**
* A <code>RIF</code> supporting the "Dilate" operation in the
* rendered image mode using MediaLib.
*
* @see com.lightcrafts.mediax.jai.operator.DilateDescriptor
* @see MlibDilateOpImage
*/
public class MlibDilateRIF implements RenderedImageFactory {
/** Constructor. */
public MlibDilateRIF() {}
/**
* Creates a new instance of <code>MlibDilateOpImage</code> in
* the rendered image mode.
*
* @param args The source image and dilation kernel.
* @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);
boolean isBinary = false;
if (!MediaLibAccessor.isMediaLibCompatible(args, layout) ||
!MediaLibAccessor.hasSameNumBands(args, layout)) {
if(!MediaLibAccessor.isMediaLibBinaryCompatible(args, layout)) {
return null;
}
isBinary = true;
}
/* Get BorderExtender from hints if any. */
BorderExtender extender = RIFUtil.getBorderExtenderHint(hints);
RenderedImage source = args.getRenderedSource(0);
KernelJAI unRotatedKernel = (KernelJAI)args.getObjectParameter(0);
KernelJAI kJAI = unRotatedKernel.getRotatedKernel();
int kWidth = kJAI.getWidth();
int kHeight= kJAI.getHeight();
int xOri = kJAI.getXOrigin();
int yOri = kJAI.getYOrigin();
int numB = source.getSampleModel().getNumBands();
/* mediaLib does not handle kernels with either dimension < 2. */
if (xOri != 1 || yOri != 1 || kWidth != 3 || kHeight != 3 || numB != 1) {
return null;
}
// check for plus and square type of kernel
float[] kdata = kJAI.getKernelData();
if (isBinary && isKernel3Square1(kdata) || !isBinary && isKernel3Square0(kdata)){
return new MlibDilate3SquareOpImage(source, extender, hints, layout);
}
if (isBinary && isKernel3Plus1(kdata)){
// plus shape
return new MlibDilate3PlusOpImage(source, extender, hints, layout);
}
return null;
}
// check to see if a 3x3 kernel has 1s at the plus positions and 0s elsewhere
private boolean isKernel3Plus1(float[] kdata){
return (kdata[0] == 0.0F && kdata[1] == 1.0F && kdata[2] == 0.0F &&
kdata[3] == 1.0F && kdata[4] == 1.0F && kdata[5] == 1.0F &&
kdata[6] == 0.0F && kdata[7] == 1.0F && kdata[8] == 0.0F);
}
// check to see if a 3x3 kernel has 1s at the plus positions
private boolean isKernel3Square0(float[] kdata){
return (kdata[0] == 0.0F && kdata[1] == 0.0F && kdata[2] == 0.0F &&
kdata[3] == 0.0F && kdata[4] == 0.0F && kdata[5] == 0.0F &&
kdata[6] == 0.0F && kdata[7] == 0.0F && kdata[8] == 0.0F);
}
// check to see if a 3x3 kernel has 1s at the plus positions
private boolean isKernel3Square1(float[] kdata){
return (kdata[0] == 1.0F && kdata[1] == 1.0F && kdata[2] == 1.0F &&
kdata[3] == 1.0F && kdata[4] == 1.0F && kdata[5] == 1.0F &&
kdata[6] == 1.0F && kdata[7] == 1.0F && kdata[8] == 1.0F);
}
}