/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Oleg V. Khaschansky
*
* @date: Oct 6, 2005
*/
package com.google.code.appengine.awt.image;
import org.apache.harmony.awt.internal.nls.Messages;
import com.google.code.appengine.awt.*;
import com.google.code.appengine.awt.geom.Point2D;
import com.google.code.appengine.awt.geom.Rectangle2D;
import com.google.code.appengine.awt.image.BufferedImage;
import com.google.code.appengine.awt.image.BufferedImageOp;
import com.google.code.appengine.awt.image.ColorModel;
import com.google.code.appengine.awt.image.ImagingOpException;
import com.google.code.appengine.awt.image.IndexColorModel;
import com.google.code.appengine.awt.image.Raster;
import com.google.code.appengine.awt.image.RasterOp;
import com.google.code.appengine.awt.image.SampleModel;
import com.google.code.appengine.awt.image.WritableRaster;
public class RescaleOp implements BufferedImageOp, RasterOp {
private float scaleFactors[];
private float offsets[];
private RenderingHints hints;
static {
// TODO
//System.loadLibrary("imageops");
}
public RescaleOp(float[] scaleFactors, float[] offsets, RenderingHints hints) {
int numFactors = Math.min(scaleFactors.length, offsets.length);
this.scaleFactors = new float[numFactors];
this.offsets = new float[numFactors];
System.arraycopy(scaleFactors, 0, this.scaleFactors, 0, numFactors);
System.arraycopy(offsets, 0, this.offsets, 0, numFactors);
this.hints = hints;
}
public RescaleOp(float scaleFactor, float offset, RenderingHints hints) {
scaleFactors = new float[1];
offsets = new float[1];
scaleFactors[0] = scaleFactor;
offsets[0] = offset;
this.hints = hints;
}
public final int getNumFactors() {
return scaleFactors.length;
}
public final RenderingHints getRenderingHints() {
return hints;
}
public final float[] getScaleFactors(float[] scaleFactors) {
if (scaleFactors == null) {
scaleFactors = new float[this.scaleFactors.length];
}
int minLength = Math.min(scaleFactors.length, this.scaleFactors.length);
System.arraycopy(this.scaleFactors, 0, scaleFactors, 0, minLength);
return scaleFactors;
}
public final float[] getOffsets(float[] offsets) {
if (offsets == null) {
offsets = new float[this.offsets.length];
}
int minLength = Math.min(offsets.length, this.offsets.length);
System.arraycopy(this.offsets, 0, offsets, 0, minLength);
return offsets;
}
public final Point2D getPoint2D(Point2D srcPt, Point2D dstPt) {
if (dstPt == null) {
dstPt = new Point2D.Float();
}
dstPt.setLocation(srcPt);
return dstPt;
}
public final Rectangle2D getBounds2D(Raster src) {
return src.getBounds();
}
public final Rectangle2D getBounds2D(BufferedImage src) {
return getBounds2D(src.getRaster());
}
public WritableRaster createCompatibleDestRaster(Raster src) {
return src.createCompatibleWritableRaster();
}
public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel dstCM) {
if (dstCM == null) {
dstCM = src.getColorModel();
}
if (dstCM instanceof IndexColorModel) {
dstCM = ColorModel.getRGBdefault();
}
WritableRaster r =
dstCM.isCompatibleSampleModel(src.getSampleModel()) ?
src.getRaster().createCompatibleWritableRaster(src.getWidth(), src.getHeight()) :
dstCM.createCompatibleWritableRaster(src.getWidth(), src.getHeight());
return new BufferedImage(
dstCM,
r,
dstCM.isAlphaPremultiplied(),
null
);
}
public final WritableRaster filter(Raster src, WritableRaster dst) {
if (dst == null) {
dst = createCompatibleDestRaster(src);
} else {
if (src.getNumBands() != dst.getNumBands()) {
// awt.21D=Number of src bands ({0}) does not match number of dst bands ({1})
throw new IllegalArgumentException(Messages.getString("awt.21D", //$NON-NLS-1$
src.getNumBands(), dst.getNumBands()));
}
}
if (
this.scaleFactors.length != 1 &&
this.scaleFactors.length != src.getNumBands()
) {
// awt.21E=Number of scaling constants is not equal to the number of bands
throw new IllegalArgumentException(Messages.getString("awt.21E")); //$NON-NLS-1$
}
// TODO
//if (ippFilter(src, dst, BufferedImage.TYPE_CUSTOM, false) != 0)
if (slowFilter(src, dst, false) != 0) {
// awt.21F=Unable to transform source
throw new ImagingOpException (Messages.getString("awt.21F")); //$NON-NLS-1$
}
return dst;
}
private final int slowFilter(Raster src, WritableRaster dst, boolean skipAlpha) {
SampleModel sm = src.getSampleModel();
int numBands = src.getNumBands();
int srcHeight = src.getHeight();
int srcWidth = src.getWidth();
int srcMinX = src.getMinX();
int srcMinY = src.getMinY();
int dstMinX = dst.getMinX();
int dstMinY = dst.getMinY();
int[] maxValues = new int[numBands];
int[] masks = new int[numBands];
int[] sampleSizes = sm.getSampleSize();
for (int i=0; i < numBands; i++){
maxValues[i] = (1 << sampleSizes[i]) - 1;
masks[i] = ~(maxValues[i]);
}
// Processing bounds
float[] pixels = null;
pixels = src.getPixels(srcMinX, srcMinY, srcWidth, srcHeight, pixels);
// Cycle over pixels to be calculated
if (skipAlpha) { // Always suppose that alpha channel is the last band
if (scaleFactors.length > 1) {
for (int i = 0; i < pixels.length; ){
for (int bandIdx = 0; bandIdx < numBands-1; bandIdx++, i++){
pixels[i] = pixels[i] * scaleFactors[bandIdx] + offsets[bandIdx];
// Check for overflow now
if (((int)pixels[i] & masks[bandIdx]) != 0) {
if (pixels[i] < 0) {
pixels[i] = 0;
} else {
pixels[i] = maxValues[bandIdx];
}
}
}
i++;
}
} else {
for (int i = 0; i < pixels.length; ){
for (int bandIdx = 0; bandIdx < numBands-1; bandIdx++, i++){
pixels[i] = pixels[i] * scaleFactors[0] + offsets[0];
// Check for overflow now
if (((int)pixels[i] & masks[bandIdx]) != 0) {
if (pixels[i] < 0) {
pixels[i] = 0;
} else {
pixels[i] = maxValues[bandIdx];
}
}
}
i++;
}
}
} else {
if (scaleFactors.length > 1) {
for (int i = 0; i < pixels.length; ){
for (int bandIdx = 0; bandIdx < numBands; bandIdx++, i++){
pixels[i] = pixels[i] * scaleFactors[bandIdx] + offsets[bandIdx];
// Check for overflow now
if (((int)pixels[i] & masks[bandIdx]) != 0) {
if (pixels[i] < 0) {
pixels[i] = 0;
} else {
pixels[i] = maxValues[bandIdx];
}
}
}
}
} else {
for (int i = 0; i < pixels.length; ){
for (int bandIdx = 0; bandIdx < numBands; bandIdx++, i++){
pixels[i] = pixels[i] * scaleFactors[0] + offsets[0];
// Check for overflow now
if (((int)pixels[i] & masks[bandIdx]) != 0) {
if (pixels[i] < 0) {
pixels[i] = 0;
} else {
pixels[i] = maxValues[bandIdx];
}
}
}
}
}
}
dst.setPixels(dstMinX, dstMinY, srcWidth, srcHeight, pixels);
return 0;
}
public final BufferedImage filter(BufferedImage src, BufferedImage dst) {
ColorModel srcCM = src.getColorModel();
if (srcCM instanceof IndexColorModel) {
// awt.220=Source should not have IndexColorModel
throw new IllegalArgumentException(Messages.getString("awt.220")); //$NON-NLS-1$
}
// Check if the number of scaling factors matches the number of bands
int nComponents = srcCM.getNumComponents();
boolean skipAlpha;
if (srcCM.hasAlpha()) {
if (scaleFactors.length == 1 || scaleFactors.length == nComponents-1) {
skipAlpha = true;
} else if (scaleFactors.length == nComponents) {
skipAlpha = false;
} else {
// awt.21E=Number of scaling constants is not equal to the number of bands
throw new IllegalArgumentException(Messages.getString("awt.21E")); //$NON-NLS-1$
}
} else if (scaleFactors.length == 1 || scaleFactors.length == nComponents) {
skipAlpha = false;
} else {
// awt.21E=Number of scaling constants is not equal to the number of bands
throw new IllegalArgumentException(Messages.getString("awt.21E")); //$NON-NLS-1$
}
BufferedImage finalDst = null;
if (dst == null) {
dst = createCompatibleDestImage(src, srcCM);
} else if (!srcCM.equals(dst.getColorModel())) {
// Treat BufferedImage.TYPE_INT_RGB and BufferedImage.TYPE_INT_ARGB as same
if (
!((src.getType() == BufferedImage.TYPE_INT_RGB ||
src.getType() == BufferedImage.TYPE_INT_ARGB) &&
(dst.getType() == BufferedImage.TYPE_INT_RGB ||
dst.getType() == BufferedImage.TYPE_INT_ARGB))
) {
finalDst = dst;
dst = createCompatibleDestImage(src, srcCM);
}
}
// TODO
//if (ippFilter(src.getRaster(), dst.getRaster(), src.getType(), skipAlpha) != 0)
if (slowFilter(src.getRaster(), dst.getRaster(), skipAlpha) != 0) {
// awt.21F=Unable to transform source
throw new ImagingOpException (Messages.getString("awt.21F")); //$NON-NLS-1$
}
if (finalDst != null) {
Graphics2D g = finalDst.createGraphics();
g.setComposite(AlphaComposite.Src);
g.drawImage(dst, 0, 0, null);
} else {
finalDst = dst;
}
return finalDst;
}
}