/*
* 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
* @version $Revision$
*
* @date: Oct 14, 2005
*/
package java.awt.image;
import java.awt.*;
import java.awt.geom.Rectangle2D;
import java.awt.geom.Point2D;
import java.util.Arrays;
import org.apache.harmony.awt.gl.AwtImageBackdoorAccessor;
import org.apache.harmony.awt.internal.nls.Messages;
/**
* The LookupOp class performs a lookup operation which transforms a source
* image by filtering each band using a table of data. The table may contain a
* single array or it may contain a different data array for each band of the
* image.
*
* @since Android 1.0
*/
public class LookupOp implements BufferedImageOp, RasterOp {
/**
* The lut.
*/
private final LookupTable lut;
/**
* The hints.
*/
private RenderingHints hints;
// TODO remove when this field is used
/**
* The can use ipp.
*/
@SuppressWarnings("unused")
private final boolean canUseIpp;
// We don't create levels/values when it is possible to reuse old
/**
* The cached levels.
*/
private int cachedLevels[];
/**
* The cached values.
*/
private int cachedValues[];
// Number of channels for which cache is valid.
// If negative number of channels is same as positive but skipAlpha was
// specified
/**
* The valid for channels.
*/
private int validForChannels;
/**
* The level initializer.
*/
static int levelInitializer[] = new int[0x10000];
static {
// TODO
// System.loadLibrary("imageops");
for (int i = 1; i <= 0x10000; i++) {
levelInitializer[i - 1] = i;
}
}
/**
* Instantiates a new LookupOp object from the specified LookupTable object
* and a RenderingHints object.
*
* @param lookup
* the specified LookupTable object.
* @param hints
* the RenderingHints object or null.
*/
public LookupOp(LookupTable lookup, RenderingHints hints) {
if (lookup == null) {
throw new NullPointerException(Messages.getString("awt.01", "lookup")); //$NON-NLS-1$ //$NON-NLS-2$
}
lut = lookup;
this.hints = hints;
canUseIpp = lut instanceof ByteLookupTable || lut instanceof ShortLookupTable;
}
/**
* Gets the LookupTable of the specified Object.
*
* @return the LookupTable of the specified Object.
*/
public final LookupTable getTable() {
return lut;
}
public final RenderingHints getRenderingHints() {
return hints;
}
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();
// Sync transfer type with LUT for component color model
if (dstCM instanceof ComponentColorModel) {
int transferType = dstCM.getTransferType();
if (lut instanceof ByteLookupTable) {
transferType = DataBuffer.TYPE_BYTE;
} else if (lut instanceof ShortLookupTable) {
transferType = DataBuffer.TYPE_SHORT;
}
dstCM = new ComponentColorModel(dstCM.cs, dstCM.hasAlpha(),
dstCM.isAlphaPremultiplied, dstCM.transparency, transferType);
}
}
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()) {
throw new IllegalArgumentException(Messages.getString("awt.237")); //$NON-NLS-1$ }
}
if (src.getWidth() != dst.getWidth()) {
throw new IllegalArgumentException(Messages.getString("awt.28F")); //$NON-NLS-1$ }
}
if (src.getHeight() != dst.getHeight()) {
throw new IllegalArgumentException(Messages.getString("awt.290")); //$NON-NLS-1$ }
}
}
if (lut.getNumComponents() != 1 && lut.getNumComponents() != src.getNumBands()) {
// awt.238=The number of arrays in the LookupTable does not meet the
// restrictions
throw new IllegalArgumentException(Messages.getString("awt.238")); //$NON-NLS-1$
}
// TODO
// if (!canUseIpp || 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;
}
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();
int nLUTComponents = lut.getNumComponents();
boolean skipAlpha;
if (srcCM.hasAlpha()) {
if (nLUTComponents == 1 || nLUTComponents == nComponents - 1) {
skipAlpha = true;
} else if (nLUTComponents == nComponents) {
skipAlpha = false;
} else {
// awt.229=Number of components in the LUT does not match the
// number of bands
throw new IllegalArgumentException(Messages.getString("awt.229")); //$NON-NLS-1$
}
} else if (nLUTComponents == 1 || nLUTComponents == nComponents) {
skipAlpha = false;
} else {
// awt.229=Number of components in the LUT does not match the number
// of bands
throw new IllegalArgumentException(Messages.getString("awt.229")); //$NON-NLS-1$
}
BufferedImage finalDst = null;
if (dst == null) {
finalDst = dst;
dst = createCompatibleDestImage(src, null);
} else {
if (src.getWidth() != dst.getWidth()) {
throw new IllegalArgumentException(Messages.getString("awt.291")); //$NON-NLS-1$
}
if (src.getHeight() != dst.getHeight()) {
throw new IllegalArgumentException(Messages.getString("awt.292")); //$NON-NLS-1$
}
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, null);
}
}
}
// TODO
// if (!canUseIpp || 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 dst;
}
/**
* Slow filter.
*
* @param src
* the src.
* @param dst
* the dst.
* @param skipAlpha
* the skip alpha.
* @return the int.
*/
private final int slowFilter(Raster src, WritableRaster dst, boolean skipAlpha) {
int minSrcX = src.getMinX();
int minDstX = dst.getMinX();
int minSrcY = src.getMinY();
int minDstY = dst.getMinY();
int skippingChannels = skipAlpha ? 1 : 0;
int numBands2Process = src.getNumBands() - skippingChannels;
int numBands = src.getNumBands();
int srcHeight = src.getHeight();
int srcWidth = src.getWidth();
int[] pixels = null;
int offset = lut.getOffset();
if (lut instanceof ByteLookupTable) {
byte[][] byteData = ((ByteLookupTable)lut).getTable();
pixels = src.getPixels(minSrcX, minSrcY, srcWidth, srcHeight, pixels);
if (lut.getNumComponents() != 1) {
for (int i = 0; i < pixels.length; i += numBands) {
for (int b = 0; b < numBands2Process; b++) {
pixels[i + b] = byteData[b][pixels[i + b] - offset] & 0xFF;
}
}
} else {
for (int i = 0; i < pixels.length; i += numBands) {
for (int b = 0; b < numBands2Process; b++) {
pixels[i + b] = byteData[0][pixels[i + b] - offset] & 0xFF;
}
}
}
dst.setPixels(minDstX, minDstY, srcWidth, srcHeight, pixels);
} else if (lut instanceof ShortLookupTable) {
short[][] shortData = ((ShortLookupTable)lut).getTable();
pixels = src.getPixels(minSrcX, minSrcY, srcWidth, srcHeight, pixels);
if (lut.getNumComponents() != 1) {
for (int i = 0; i < pixels.length; i += numBands) {
for (int b = 0; b < numBands2Process; b++) {
pixels[i + b] = shortData[b][pixels[i + b] - offset] & 0xFFFF;
}
}
} else {
for (int i = 0; i < pixels.length; i += numBands) {
for (int b = 0; b < numBands2Process; b++) {
pixels[i + b] = shortData[0][pixels[i + b] - offset] & 0xFFFF;
}
}
}
dst.setPixels(minDstX, minDstY, srcWidth, srcHeight, pixels);
} else {
int pixel[] = new int[src.getNumBands()];
int maxY = minSrcY + srcHeight;
int maxX = minSrcX + srcWidth;
for (int srcY = minSrcY, dstY = minDstY; srcY < maxY; srcY++, dstY++) {
for (int srcX = minSrcX, dstX = minDstX; srcX < maxX; srcX++, dstX++) {
src.getPixel(srcX, srcY, pixel);
lut.lookupPixel(pixel, pixel);
dst.setPixel(dstX, dstY, pixel);
}
}
}
return 0;
}
/**
* Creates the byte levels.
*
* @param channels
* the channels.
* @param skipAlpha
* the skip alpha.
* @param levels
* the levels.
* @param values
* the values.
* @param channelsOrder
* the channels order.
*/
private final void createByteLevels(int channels, boolean skipAlpha, int levels[],
int values[], int channelsOrder[]) {
byte data[][] = ((ByteLookupTable)lut).getTable();
int nLevels = data[0].length;
int offset = lut.getOffset();
// Use one data array for all channels or use several data arrays
int dataIncrement = data.length > 1 ? 1 : 0;
for (int ch = 0, dataIdx = 0; ch < channels; dataIdx += dataIncrement, ch++) {
int channelOffset = channelsOrder == null ? ch : channelsOrder[ch];
int channelBase = nLevels * channelOffset;
// Skip last channel if needed, zero values are OK -
// no changes to the channel information will be done in IPP
if ((channelOffset == channels - 1 && skipAlpha) || (dataIdx >= data.length)) {
continue;
}
System.arraycopy(levelInitializer, offset, levels, channelBase, nLevels);
for (int from = 0, to = channelBase; from < nLevels; from++, to++) {
values[to] = data[dataIdx][from] & 0xFF;
}
}
}
/**
* Creates the short levels.
*
* @param channels
* the channels.
* @param skipAlpha
* the skip alpha.
* @param levels
* the levels.
* @param values
* the values.
* @param channelsOrder
* the channels order.
*/
private final void createShortLevels(int channels, boolean skipAlpha, int levels[],
int values[], int channelsOrder[]) {
short data[][] = ((ShortLookupTable)lut).getTable();
int nLevels = data[0].length;
int offset = lut.getOffset();
// Use one data array for all channels or use several data arrays
int dataIncrement = data.length > 1 ? 1 : 0;
for (int ch = 0, dataIdx = 0; ch < channels; dataIdx += dataIncrement, ch++) {
int channelOffset = channelsOrder == null ? ch : channelsOrder[ch];
// Skip last channel if needed, zero values are OK -
// no changes to the channel information will be done in IPP
if ((channelOffset == channels - 1 && skipAlpha) || (dataIdx >= data.length)) {
continue;
}
int channelBase = nLevels * channelOffset;
System.arraycopy(levelInitializer, offset, levels, channelBase, nLevels);
for (int from = 0, to = channelBase; from < nLevels; from++, to++) {
values[to] = data[dataIdx][from] & 0xFFFF;
}
}
}
// TODO remove when this method is used
/**
* Ipp filter.
*
* @param src
* the src.
* @param dst
* the dst.
* @param imageType
* the image type.
* @param skipAlpha
* the skip alpha.
* @return the int.
*/
@SuppressWarnings("unused")
private final int ippFilter(Raster src, WritableRaster dst, int imageType, boolean skipAlpha) {
int res;
int srcStride, dstStride;
int channels;
int offsets[] = null;
int channelsOrder[] = null;
switch (imageType) {
case BufferedImage.TYPE_INT_ARGB:
case BufferedImage.TYPE_INT_ARGB_PRE:
case BufferedImage.TYPE_INT_RGB: {
channels = 4;
srcStride = src.getWidth() * 4;
dstStride = dst.getWidth() * 4;
channelsOrder = new int[] {
2, 1, 0, 3
};
break;
}
case BufferedImage.TYPE_4BYTE_ABGR:
case BufferedImage.TYPE_4BYTE_ABGR_PRE:
case BufferedImage.TYPE_INT_BGR: {
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);
}
// Have IPP functions for 1, 3 and 4 channels
channels = srcSM.getNumBands();
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[] = null, values[] = null;
int channelMultiplier = skipAlpha ? -1 : 1;
if (channelMultiplier * channels == validForChannels) { // use existing
// levels/values
levels = cachedLevels;
values = cachedValues;
} else { // create new levels/values
if (lut instanceof ByteLookupTable) {
byte data[][] = ((ByteLookupTable)lut).getTable();
levels = new int[channels * data[0].length];
values = new int[channels * data[0].length];
createByteLevels(channels, skipAlpha, levels, values, channelsOrder);
} else if (lut instanceof ShortLookupTable) {
short data[][] = ((ShortLookupTable)lut).getTable();
levels = new int[channels * data[0].length];
values = new int[channels * data[0].length];
createShortLevels(channels, skipAlpha, levels, values, channelsOrder);
}
// cache levels/values
validForChannels = channelMultiplier * channels;
cachedLevels = levels;
cachedValues = values;
}
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 = ippLUT(srcData, src.getWidth(), src.getHeight(), srcStride, dstData, dst.getWidth(),
dst.getHeight(), dstStride, levels, values, channels, offsets, false);
return res;
}
/**
* Ipp lut.
*
* @param src
* the src.
* @param srcWidth
* the src width.
* @param srcHeight
* the src height.
* @param srcStride
* the src stride.
* @param dst
* the dst.
* @param dstWidth
* the dst width.
* @param dstHeight
* the dst height.
* @param dstStride
* the dst stride.
* @param levels
* the levels.
* @param values
* the values.
* @param channels
* the channels.
* @param offsets
* the offsets.
* @param linear
* the linear.
* @return the int.
*/
final static native int ippLUT(Object src, int srcWidth, int srcHeight, int srcStride,
Object dst, int dstWidth, int dstHeight, int dstStride, int levels[], int values[],
int channels, int offsets[], boolean linear);
}