/*
* $RCSfile: ImageFunctionRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 04:56:29 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.opimage;
import java.awt.RenderingHints;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.RenderedImageFactory;
import java.awt.image.renderable.ParameterBlock;
import com.lightcrafts.mediax.jai.ImageFunction;
import com.lightcrafts.mediax.jai.ImageLayout;
/**
* A <code>RIF</code> supporting the "ImageFunction" operation in the rendered
* image layer.
*
* @see com.lightcrafts.mediax.jai.operator.ImageFunctionDescriptor
* @see com.lightcrafts.mediax.jai.ImageFunction
* @since EA4
*/
public class ImageFunctionRIF implements RenderedImageFactory {
/** Constructor. */
public ImageFunctionRIF() {}
/**
* Creates a new instance of ImageFunctionOpImage in the rendered layer.
* This method satisfies the implementation of RIF.
*
* @param paramBlock The source image, the X and Y scale factor,
* and the interpolation method for resampling.
*/
public RenderedImage create(ParameterBlock paramBlock,
RenderingHints renderHints) {
// Get ImageLayout from renderHints if any.
ImageLayout layout = RIFUtil.getImageLayoutHint(renderHints);
ImageFunction function =
(ImageFunction)paramBlock.getObjectParameter(0);
// Ascertain that a supplied SampleModel has the requisite
// number of bands vis-a-vis the ImageFunction.
int numBandsRequired = function.isComplex() ?
function.getNumElements() * 2 : function.getNumElements();
if(layout != null &&
layout.isValid(ImageLayout.SAMPLE_MODEL_MASK) &&
layout.getSampleModel(null).getNumBands() != numBandsRequired ) {
throw new RuntimeException(JaiI18N.getString("ImageFunctionRIF0"));
}
int minX = 0;
int minY = 0;
if (layout != null) {
if (layout.isValid(ImageLayout.MIN_X_MASK)) {
minX = layout.getMinX(null);
}
if (layout.isValid(ImageLayout.MIN_Y_MASK)) {
minY = layout.getMinX(null);
}
}
int width = paramBlock.getIntParameter(1);
int height = paramBlock.getIntParameter(2);
float xScale = paramBlock.getFloatParameter(3);
float yScale = paramBlock.getFloatParameter(4);
float xTrans = paramBlock.getFloatParameter(5);
float yTrans = paramBlock.getFloatParameter(6);
return new ImageFunctionOpImage(function,
minX, minY,
width, height,
xScale, yScale,
xTrans, yTrans,
renderHints, layout);
}
}