660 lines
23 KiB
Java
660 lines
23 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Oleg V. Khaschansky
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* @version $Revision$
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*
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* @date: Oct 6, 2005
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*/
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package java.awt.image;
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import java.awt.geom.Point2D;
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import java.awt.geom.Rectangle2D;
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import java.awt.*;
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import java.util.Arrays;
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import org.apache.harmony.awt.gl.AwtImageBackdoorAccessor;
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import org.apache.harmony.awt.internal.nls.Messages;
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/**
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* The Class RescaleOp performs rescaling of the source image data by
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* multiplying the pixel values with a scale factor and then adding an offset.
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*
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* @since Android 1.0
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*/
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public class RescaleOp implements BufferedImageOp, RasterOp {
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/**
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* The scale factors.
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*/
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private float scaleFactors[];
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/**
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* The offsets.
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*/
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private float offsets[];
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/**
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* The hints.
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*/
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private RenderingHints hints;
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static {
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// TODO
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// System.loadLibrary("imageops");
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}
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/**
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* Instantiates a new RescaleOp object with the specified scale factors and
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* offsets.
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*
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* @param scaleFactors
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* the array of scale factor values.
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* @param offsets
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* the array of offset values.
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* @param hints
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* the RenderingHints or null.
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*/
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public RescaleOp(float[] scaleFactors, float[] offsets, RenderingHints hints) {
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int numFactors = Math.min(scaleFactors.length, offsets.length);
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this.scaleFactors = new float[numFactors];
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this.offsets = new float[numFactors];
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System.arraycopy(scaleFactors, 0, this.scaleFactors, 0, numFactors);
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System.arraycopy(offsets, 0, this.offsets, 0, numFactors);
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this.hints = hints;
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}
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/**
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* Instantiates a new RescaleOp object with the specified scale factor and
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* offset.
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*
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* @param scaleFactor
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* the scale factor.
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* @param offset
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* the offset.
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* @param hints
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* the RenderingHints or null.
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*/
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public RescaleOp(float scaleFactor, float offset, RenderingHints hints) {
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scaleFactors = new float[1];
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offsets = new float[1];
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scaleFactors[0] = scaleFactor;
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offsets[0] = offset;
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this.hints = hints;
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}
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/**
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* Gets the number of scaling factors.
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*
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* @return the number of scaling factors.
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*/
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public final int getNumFactors() {
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return scaleFactors.length;
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}
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public final RenderingHints getRenderingHints() {
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return hints;
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}
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/**
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* Gets the scale factors of this RescaleOp.
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*
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* @param scaleFactors
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* the desired scale factors array will be copied to this array.
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* @return the scale factors array.
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*/
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public final float[] getScaleFactors(float[] scaleFactors) {
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if (scaleFactors == null) {
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scaleFactors = new float[this.scaleFactors.length];
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}
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int minLength = Math.min(scaleFactors.length, this.scaleFactors.length);
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System.arraycopy(this.scaleFactors, 0, scaleFactors, 0, minLength);
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return scaleFactors;
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}
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/**
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* Gets the offsets array of this RescaleOp.
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*
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* @param offsets
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* the desired offsets array will be copied to this array.
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* @return the offsets array of this RescaleOp.
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*/
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public final float[] getOffsets(float[] offsets) {
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if (offsets == null) {
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offsets = new float[this.offsets.length];
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}
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int minLength = Math.min(offsets.length, this.offsets.length);
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System.arraycopy(this.offsets, 0, offsets, 0, minLength);
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return offsets;
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}
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public final Point2D getPoint2D(Point2D srcPt, Point2D dstPt) {
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if (dstPt == null) {
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dstPt = new Point2D.Float();
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}
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dstPt.setLocation(srcPt);
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return dstPt;
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}
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public final Rectangle2D getBounds2D(Raster src) {
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return src.getBounds();
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}
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public final Rectangle2D getBounds2D(BufferedImage src) {
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return getBounds2D(src.getRaster());
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}
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public WritableRaster createCompatibleDestRaster(Raster src) {
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return src.createCompatibleWritableRaster();
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}
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public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel dstCM) {
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if (dstCM == null) {
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dstCM = src.getColorModel();
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}
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if (dstCM instanceof IndexColorModel) {
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dstCM = ColorModel.getRGBdefault();
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}
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WritableRaster r = dstCM.isCompatibleSampleModel(src.getSampleModel()) ? src.getRaster()
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.createCompatibleWritableRaster(src.getWidth(), src.getHeight()) : dstCM
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.createCompatibleWritableRaster(src.getWidth(), src.getHeight());
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return new BufferedImage(dstCM, r, dstCM.isAlphaPremultiplied(), null);
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}
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public final WritableRaster filter(Raster src, WritableRaster dst) {
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if (dst == null) {
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dst = createCompatibleDestRaster(src);
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} else {
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if (src.getNumBands() != dst.getNumBands()) {
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// awt.21D=Number of src bands ({0}) does not match number of
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// dst bands ({1})
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throw new IllegalArgumentException(Messages.getString("awt.21D", //$NON-NLS-1$
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src.getNumBands(), dst.getNumBands()));
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}
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}
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if (this.scaleFactors.length != 1 && this.scaleFactors.length != src.getNumBands()) {
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// awt.21E=Number of scaling constants is not equal to the number of
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// bands
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throw new IllegalArgumentException(Messages.getString("awt.21E")); //$NON-NLS-1$
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}
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// TODO
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// if (ippFilter(src, dst, BufferedImage.TYPE_CUSTOM, false) != 0)
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if (slowFilter(src, dst, false) != 0) {
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// awt.21F=Unable to transform source
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throw new ImagingOpException(Messages.getString("awt.21F")); //$NON-NLS-1$
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}
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return dst;
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}
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/**
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* Slow filter.
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*
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* @param src
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* the src.
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* @param dst
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* the dst.
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* @param skipAlpha
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* the skip alpha.
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* @return the int.
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*/
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private final int slowFilter(Raster src, WritableRaster dst, boolean skipAlpha) {
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SampleModel sm = src.getSampleModel();
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int numBands = src.getNumBands();
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int srcHeight = src.getHeight();
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int srcWidth = src.getWidth();
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int srcMinX = src.getMinX();
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int srcMinY = src.getMinY();
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int dstMinX = dst.getMinX();
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int dstMinY = dst.getMinY();
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int[] maxValues = new int[numBands];
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int[] masks = new int[numBands];
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int[] sampleSizes = sm.getSampleSize();
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for (int i = 0; i < numBands; i++) {
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maxValues[i] = (1 << sampleSizes[i]) - 1;
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masks[i] = ~(maxValues[i]);
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}
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// Processing bounds
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float[] pixels = null;
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pixels = src.getPixels(srcMinX, srcMinY, srcWidth, srcHeight, pixels);
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// Cycle over pixels to be calculated
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if (skipAlpha) { // Always suppose that alpha channel is the last band
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if (scaleFactors.length > 1) {
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for (int i = 0; i < pixels.length;) {
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for (int bandIdx = 0; bandIdx < numBands - 1; bandIdx++, i++) {
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pixels[i] = pixels[i] * scaleFactors[bandIdx] + offsets[bandIdx];
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// Check for overflow now
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if (((int)pixels[i] & masks[bandIdx]) != 0) {
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if (pixels[i] < 0) {
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pixels[i] = 0;
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} else {
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pixels[i] = maxValues[bandIdx];
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}
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}
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}
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i++;
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}
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} else {
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for (int i = 0; i < pixels.length;) {
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for (int bandIdx = 0; bandIdx < numBands - 1; bandIdx++, i++) {
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pixels[i] = pixels[i] * scaleFactors[0] + offsets[0];
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// Check for overflow now
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if (((int)pixels[i] & masks[bandIdx]) != 0) {
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if (pixels[i] < 0) {
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pixels[i] = 0;
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} else {
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pixels[i] = maxValues[bandIdx];
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}
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}
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}
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i++;
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}
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}
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} else {
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if (scaleFactors.length > 1) {
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for (int i = 0; i < pixels.length;) {
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for (int bandIdx = 0; bandIdx < numBands; bandIdx++, i++) {
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pixels[i] = pixels[i] * scaleFactors[bandIdx] + offsets[bandIdx];
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// Check for overflow now
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if (((int)pixels[i] & masks[bandIdx]) != 0) {
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if (pixels[i] < 0) {
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pixels[i] = 0;
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} else {
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pixels[i] = maxValues[bandIdx];
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}
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}
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}
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}
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} else {
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for (int i = 0; i < pixels.length;) {
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for (int bandIdx = 0; bandIdx < numBands; bandIdx++, i++) {
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pixels[i] = pixels[i] * scaleFactors[0] + offsets[0];
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// Check for overflow now
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if (((int)pixels[i] & masks[bandIdx]) != 0) {
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if (pixels[i] < 0) {
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pixels[i] = 0;
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} else {
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pixels[i] = maxValues[bandIdx];
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}
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}
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}
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}
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}
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}
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dst.setPixels(dstMinX, dstMinY, srcWidth, srcHeight, pixels);
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return 0;
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}
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public final BufferedImage filter(BufferedImage src, BufferedImage dst) {
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ColorModel srcCM = src.getColorModel();
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if (srcCM instanceof IndexColorModel) {
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// awt.220=Source should not have IndexColorModel
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throw new IllegalArgumentException(Messages.getString("awt.220")); //$NON-NLS-1$
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}
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// Check if the number of scaling factors matches the number of bands
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int nComponents = srcCM.getNumComponents();
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boolean skipAlpha;
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if (srcCM.hasAlpha()) {
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if (scaleFactors.length == 1 || scaleFactors.length == nComponents - 1) {
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skipAlpha = true;
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} else if (scaleFactors.length == nComponents) {
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skipAlpha = false;
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} else {
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// awt.21E=Number of scaling constants is not equal to the
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// number of bands
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throw new IllegalArgumentException(Messages.getString("awt.21E")); //$NON-NLS-1$
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}
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} else if (scaleFactors.length == 1 || scaleFactors.length == nComponents) {
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skipAlpha = false;
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} else {
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// awt.21E=Number of scaling constants is not equal to the number of
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// bands
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throw new IllegalArgumentException(Messages.getString("awt.21E")); //$NON-NLS-1$
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}
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BufferedImage finalDst = null;
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if (dst == null) {
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finalDst = dst;
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dst = createCompatibleDestImage(src, srcCM);
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} else if (!srcCM.equals(dst.getColorModel())) {
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// Treat BufferedImage.TYPE_INT_RGB and BufferedImage.TYPE_INT_ARGB
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// as same
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if (!((src.getType() == BufferedImage.TYPE_INT_RGB || src.getType() == BufferedImage.TYPE_INT_ARGB) && (dst
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.getType() == BufferedImage.TYPE_INT_RGB || dst.getType() == BufferedImage.TYPE_INT_ARGB))) {
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finalDst = dst;
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dst = createCompatibleDestImage(src, srcCM);
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}
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}
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// TODO
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// if (ippFilter(src.getRaster(), dst.getRaster(), src.getType(),
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// skipAlpha) != 0)
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if (slowFilter(src.getRaster(), dst.getRaster(), skipAlpha) != 0) {
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// awt.21F=Unable to transform source
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throw new ImagingOpException(Messages.getString("awt.21F")); //$NON-NLS-1$
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}
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if (finalDst != null) {
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Graphics2D g = finalDst.createGraphics();
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g.setComposite(AlphaComposite.Src);
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g.drawImage(dst, 0, 0, null);
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} else {
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finalDst = dst;
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}
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return finalDst;
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}
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// Don't forget to pass allocated arrays for levels and values, size should
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// be numBands*4
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/**
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* Creates the levels.
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*
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* @param sm
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* the sm.
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* @param numBands
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* the num bands.
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* @param skipAlpha
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* the skip alpha.
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* @param levels
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* the levels.
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* @param values
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* the values.
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* @param channelsOrder
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* the channels order.
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*/
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private final void createLevels(SampleModel sm, int numBands, boolean skipAlpha, int levels[],
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int values[], int channelsOrder[]) {
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// Suppose same sample size for all channels, otherwise use slow filter
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int maxValue = (1 << sm.getSampleSize(0)) - 1;
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// For simplicity introduce these arrays
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float extScaleFactors[] = new float[numBands];
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float extOffsets[] = new float[numBands];
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if (scaleFactors.length != 1) {
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System.arraycopy(scaleFactors, 0, extScaleFactors, 0, scaleFactors.length);
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System.arraycopy(offsets, 0, extOffsets, 0, scaleFactors.length);
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} else {
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for (int i = 0; i < numBands; i++) {
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extScaleFactors[i] = scaleFactors[0];
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extOffsets[i] = offsets[0];
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}
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}
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if (skipAlpha) {
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extScaleFactors[numBands - 1] = 1;
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extOffsets[numBands - 1] = 0;
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}
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// Create a levels
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for (int i = 0; i < numBands; i++) {
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if (extScaleFactors[i] == 0) {
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levels[i * 4] = 0;
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levels[i * 4 + 1] = 0;
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levels[i * 4 + 2] = maxValue + 1;
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levels[i * 4 + 3] = maxValue + 1;
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}
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float minLevel = -extOffsets[i] / extScaleFactors[i];
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float maxLevel = (maxValue - extOffsets[i]) / extScaleFactors[i];
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if (minLevel < 0) {
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minLevel = 0;
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} else if (minLevel > maxValue) {
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minLevel = maxValue;
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}
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if (maxLevel < 0) {
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maxLevel = 0;
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} else if (maxLevel > maxValue) {
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maxLevel = maxValue;
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}
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levels[i * 4] = 0;
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if (minLevel > maxLevel) {
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levels[i * 4 + 1] = (int)maxLevel;
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levels[i * 4 + 2] = (int)minLevel;
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} else {
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levels[i * 4 + 1] = (int)minLevel;
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levels[i * 4 + 2] = (int)maxLevel;
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}
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levels[i * 4 + 3] = maxValue + 1;
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// Fill values
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for (int k = 0; k < 4; k++) {
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int idx = i * 4 + k;
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values[idx] = (int)(extScaleFactors[i] * levels[idx] + extOffsets[i]);
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if (values[idx] < 0) {
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values[idx] = 0;
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} else if (values[idx] > maxValue) {
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values[idx] = maxValue;
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}
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}
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}
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// Reorder data if channels are stored in different order
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if (channelsOrder != null) {
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int len = numBands * 4;
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int savedLevels[] = new int[len];
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int savedValues[] = new int[len];
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System.arraycopy(levels, 0, savedLevels, 0, len);
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System.arraycopy(values, 0, savedValues, 0, len);
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for (int i = 0; i < channelsOrder.length; i++) {
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System.arraycopy(savedLevels, i * 4, levels, channelsOrder[i] * 4, 4);
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System.arraycopy(savedValues, i * 4, values, channelsOrder[i] * 4, 4);
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}
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}
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}
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// TODO remove when this method is used
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/**
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* Ipp filter.
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*
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* @param src
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* the src.
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* @param dst
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* the dst.
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* @param imageType
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* the image type.
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* @param skipAlpha
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* the skip alpha.
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* @return the int.
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*/
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@SuppressWarnings("unused")
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private final int ippFilter(Raster src, WritableRaster dst, int imageType, boolean skipAlpha) {
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int res;
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int srcStride, dstStride;
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int channels;
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int offsets[] = null;
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int channelsOrder[] = null;
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switch (imageType) {
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case BufferedImage.TYPE_INT_ARGB:
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case BufferedImage.TYPE_INT_ARGB_PRE:
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case BufferedImage.TYPE_INT_RGB: {
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channels = 4;
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srcStride = src.getWidth() * 4;
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dstStride = dst.getWidth() * 4;
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channelsOrder = new int[] {
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2, 1, 0, 3
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};
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break;
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}
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case BufferedImage.TYPE_4BYTE_ABGR:
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case BufferedImage.TYPE_4BYTE_ABGR_PRE:
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case BufferedImage.TYPE_INT_BGR: {
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|
channels = 4;
|
|
srcStride = src.getWidth() * 4;
|
|
dstStride = dst.getWidth() * 4;
|
|
break;
|
|
}
|
|
|
|
case BufferedImage.TYPE_BYTE_GRAY: {
|
|
channels = 1;
|
|
srcStride = src.getWidth();
|
|
dstStride = dst.getWidth();
|
|
break;
|
|
}
|
|
|
|
case BufferedImage.TYPE_3BYTE_BGR: {
|
|
channels = 3;
|
|
srcStride = src.getWidth() * 3;
|
|
dstStride = dst.getWidth() * 3;
|
|
channelsOrder = new int[] {
|
|
2, 1, 0
|
|
};
|
|
break;
|
|
}
|
|
|
|
case BufferedImage.TYPE_USHORT_GRAY:
|
|
case BufferedImage.TYPE_USHORT_565_RGB:
|
|
case BufferedImage.TYPE_USHORT_555_RGB:
|
|
case BufferedImage.TYPE_BYTE_BINARY: {
|
|
return slowFilter(src, dst, skipAlpha);
|
|
}
|
|
|
|
default: {
|
|
SampleModel srcSM = src.getSampleModel();
|
|
SampleModel dstSM = dst.getSampleModel();
|
|
|
|
if (srcSM instanceof PixelInterleavedSampleModel
|
|
&& dstSM instanceof PixelInterleavedSampleModel) {
|
|
// Check PixelInterleavedSampleModel
|
|
if (srcSM.getDataType() != DataBuffer.TYPE_BYTE
|
|
|| dstSM.getDataType() != DataBuffer.TYPE_BYTE) {
|
|
return slowFilter(src, dst, skipAlpha);
|
|
}
|
|
|
|
channels = srcSM.getNumBands(); // Have IPP functions for 1,
|
|
// 3 and 4 channels
|
|
if (!(channels == 1 || channels == 3 || channels == 4)) {
|
|
return slowFilter(src, dst, skipAlpha);
|
|
}
|
|
|
|
srcStride = ((ComponentSampleModel)srcSM).getScanlineStride();
|
|
dstStride = ((ComponentSampleModel)dstSM).getScanlineStride();
|
|
|
|
channelsOrder = ((ComponentSampleModel)srcSM).getBandOffsets();
|
|
} else if (srcSM instanceof SinglePixelPackedSampleModel
|
|
&& dstSM instanceof SinglePixelPackedSampleModel) {
|
|
// Check SinglePixelPackedSampleModel
|
|
SinglePixelPackedSampleModel sppsm1 = (SinglePixelPackedSampleModel)srcSM;
|
|
SinglePixelPackedSampleModel sppsm2 = (SinglePixelPackedSampleModel)dstSM;
|
|
|
|
channels = sppsm1.getNumBands();
|
|
|
|
// TYPE_INT_RGB, TYPE_INT_ARGB...
|
|
if (sppsm1.getDataType() != DataBuffer.TYPE_INT
|
|
|| sppsm2.getDataType() != DataBuffer.TYPE_INT
|
|
|| !(channels == 3 || channels == 4)) {
|
|
return slowFilter(src, dst, skipAlpha);
|
|
}
|
|
|
|
// Check compatibility of sample models
|
|
if (!Arrays.equals(sppsm1.getBitOffsets(), sppsm2.getBitOffsets())
|
|
|| !Arrays.equals(sppsm1.getBitMasks(), sppsm2.getBitMasks())) {
|
|
return slowFilter(src, dst, skipAlpha);
|
|
}
|
|
|
|
for (int i = 0; i < channels; i++) {
|
|
if (sppsm1.getSampleSize(i) != 8) {
|
|
return slowFilter(src, dst, skipAlpha);
|
|
}
|
|
}
|
|
|
|
channelsOrder = new int[channels];
|
|
int bitOffsets[] = sppsm1.getBitOffsets();
|
|
for (int i = 0; i < channels; i++) {
|
|
channelsOrder[i] = bitOffsets[i] / 8;
|
|
}
|
|
|
|
if (channels == 3) { // Don't skip channel now, could be
|
|
// optimized
|
|
channels = 4;
|
|
}
|
|
|
|
srcStride = sppsm1.getScanlineStride() * 4;
|
|
dstStride = sppsm2.getScanlineStride() * 4;
|
|
} else {
|
|
return slowFilter(src, dst, skipAlpha);
|
|
}
|
|
|
|
// Fill offsets if there's a child raster
|
|
if (src.getParent() != null || dst.getParent() != null) {
|
|
if (src.getSampleModelTranslateX() != 0 || src.getSampleModelTranslateY() != 0
|
|
|| dst.getSampleModelTranslateX() != 0
|
|
|| dst.getSampleModelTranslateY() != 0) {
|
|
offsets = new int[4];
|
|
offsets[0] = -src.getSampleModelTranslateX() + src.getMinX();
|
|
offsets[1] = -src.getSampleModelTranslateY() + src.getMinY();
|
|
offsets[2] = -dst.getSampleModelTranslateX() + dst.getMinX();
|
|
offsets[3] = -dst.getSampleModelTranslateY() + dst.getMinY();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int levels[] = new int[4 * channels];
|
|
int values[] = new int[4 * channels];
|
|
|
|
createLevels(src.getSampleModel(), channels, skipAlpha, levels, values, channelsOrder);
|
|
|
|
Object srcData, dstData;
|
|
AwtImageBackdoorAccessor dbAccess = AwtImageBackdoorAccessor.getInstance();
|
|
try {
|
|
srcData = dbAccess.getData(src.getDataBuffer());
|
|
dstData = dbAccess.getData(dst.getDataBuffer());
|
|
} catch (IllegalArgumentException e) {
|
|
return -1; // Unknown data buffer type
|
|
}
|
|
|
|
res = LookupOp.ippLUT(srcData, src.getWidth(), src.getHeight(), srcStride, dstData, dst
|
|
.getWidth(), dst.getHeight(), dstStride, levels, values, channels, offsets, true);
|
|
|
|
return res;
|
|
}
|
|
}
|