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An Open Source JavaFX PDF Viewer
/**
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/java-pdf-library-support/
*
* (C) Copyright 1997-2008, IDRsolutions and Contributors.
* Main Developer: Simon Barnett
*
* This file is part of JPedal
*
* Copyright (c) 2008, IDRsolutions
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the IDRsolutions nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY IDRsolutions ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL IDRsolutions BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Other JBIG2 image decoding implementations include
* jbig2dec (http://jbig2dec.sourceforge.net/)
* xpdf (http://www.foolabs.com/xpdf/)
*
* The final draft JBIG2 specification can be found at http://www.jpeg.org/public/fcd14492.pdf
*
* All three of the above resources were used in the writing of this software, with methodologies,
* processes and inspiration taken from all three.
*
* ---------------
* JBIG2Bitmap.java
* ---------------
*/
package org.jpedal.jbig2.image;
import java.awt.image.BufferedImage;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.io.IOException;
import java.util.Arrays;
import java.util.BitSet;
import org.jpedal.jbig2.JBIG2Exception;
import org.jpedal.jbig2.decoders.ArithmeticDecoder;
import org.jpedal.jbig2.decoders.DecodeIntResult;
import org.jpedal.jbig2.decoders.HuffmanDecoder;
import org.jpedal.jbig2.decoders.JBIG2StreamDecoder;
import org.jpedal.jbig2.decoders.MMRDecoder;
import org.jpedal.jbig2.util.BinaryOperation;
public final class JBIG2Bitmap {
private int width, height, line;
private int bitmapNumber;
//private FastBitSet data;
//@sam - little task to investigate
// private BitSet data;
private byte[] newData;
// boolean useByteArray=false;
//private static int counter = 0;
private ArithmeticDecoder arithmeticDecoder;
private HuffmanDecoder huffmanDecoder;
private MMRDecoder mmrDecoder;
public JBIG2Bitmap(int width, int height, ArithmeticDecoder arithmeticDecoder, HuffmanDecoder huffmanDecoder, MMRDecoder mmrDecoder) {
this.width = width;
this.height = height;
this.arithmeticDecoder = arithmeticDecoder;
this.huffmanDecoder = huffmanDecoder;
this.mmrDecoder = mmrDecoder;
this.line = (width + 7) >> 3;
// if (useByteArray)
this.newData = new byte[line * height];
// else
// this.data = new BitSet(width * height);
}
public void readBitmap(boolean useMMR, int template, boolean typicalPredictionGenericDecodingOn, boolean useSkip, JBIG2Bitmap skipBitmap, short[] adaptiveTemplateX, short[] adaptiveTemplateY, int mmrDataLength) throws IOException, JBIG2Exception {
if (useMMR) {
//MMRDecoder mmrDecoder = MMRDecoder.getInstance();
mmrDecoder.reset();
int[] referenceLine = new int[width + 2];
int[] codingLine = new int[width + 2];
codingLine[0] = codingLine[1] = width;
for (int row = 0; row < height; row++) {
int i = 0;
for (; codingLine[i] < width; i++) {
referenceLine[i] = codingLine[i];
}
referenceLine[i] = referenceLine[i + 1] = width;
int referenceI = 0;
int codingI = 0;
int a0 = 0;
do {
int code1 = mmrDecoder.get2DCode(), code2, code3;
switch (code1) {
case MMRDecoder.twoDimensionalPass:
if (referenceLine[referenceI] < width) {
a0 = referenceLine[referenceI + 1];
referenceI += 2;
}
break;
case MMRDecoder.twoDimensionalHorizontal:
if ((codingI & 1) != 0) {
code1 = 0;
do {
code1 += code3 = mmrDecoder.getBlackCode();
} while (code3 >= 64);
code2 = 0;
do {
code2 += code3 = mmrDecoder.getWhiteCode();
} while (code3 >= 64);
} else {
code1 = 0;
do {
code1 += code3 = mmrDecoder.getWhiteCode();
} while (code3 >= 64);
code2 = 0;
do {
code2 += code3 = mmrDecoder.getBlackCode();
} while (code3 >= 64);
}
if (code1 > 0 || code2 > 0) {
a0 = codingLine[codingI++] = a0 + code1;
a0 = codingLine[codingI++] = a0 + code2;
while (referenceLine[referenceI] <= a0 && referenceLine[referenceI] < width) {
referenceI += 2;
}
}
break;
case MMRDecoder.twoDimensionalVertical0:
a0 = codingLine[codingI++] = referenceLine[referenceI];
if (referenceLine[referenceI] < width) {
referenceI++;
}
break;
case MMRDecoder.twoDimensionalVerticalR1:
a0 = codingLine[codingI++] = referenceLine[referenceI] + 1;
if (referenceLine[referenceI] < width) {
referenceI++;
while (referenceLine[referenceI] <= a0 && referenceLine[referenceI] < width) {
referenceI += 2;
}
}
break;
case MMRDecoder.twoDimensionalVerticalR2:
a0 = codingLine[codingI++] = referenceLine[referenceI] + 2;
if (referenceLine[referenceI] < width) {
referenceI++;
while (referenceLine[referenceI] <= a0 && referenceLine[referenceI] < width) {
referenceI += 2;
}
}
break;
case MMRDecoder.twoDimensionalVerticalR3:
a0 = codingLine[codingI++] = referenceLine[referenceI] + 3;
if (referenceLine[referenceI] < width) {
referenceI++;
while (referenceLine[referenceI] <= a0 && referenceLine[referenceI] < width) {
referenceI += 2;
}
}
break;
case MMRDecoder.twoDimensionalVerticalL1:
a0 = codingLine[codingI++] = referenceLine[referenceI] - 1;
if (referenceI > 0) {
referenceI--;
} else {
referenceI++;
}
while (referenceLine[referenceI] <= a0 && referenceLine[referenceI] < width) {
referenceI += 2;
}
break;
case MMRDecoder.twoDimensionalVerticalL2:
a0 = codingLine[codingI++] = referenceLine[referenceI] - 2;
if (referenceI > 0) {
referenceI--;
} else {
referenceI++;
}
while (referenceLine[referenceI] <= a0 && referenceLine[referenceI] < width) {
referenceI += 2;
}
break;
case MMRDecoder.twoDimensionalVerticalL3:
a0 = codingLine[codingI++] = referenceLine[referenceI] - 3;
if (referenceI > 0) {
referenceI--;
} else {
referenceI++;
}
while (referenceLine[referenceI] <= a0 && referenceLine[referenceI] < width) {
referenceI += 2;
}
break;
default:
if (JBIG2StreamDecoder.debug)
System.out.println("Illegal code in JBIG2 MMR bitmap data");
break;
}
} while (a0 < width);
codingLine[codingI++] = width;
for (int j = 0; codingLine[j] < width; j += 2) {
for (int col = codingLine[j]; col < codingLine[j + 1]; col++) {
setPixel(col, row, 1);
}
}
}
if (mmrDataLength >= 0) {
mmrDecoder.skipTo(mmrDataLength);
} else {
if (mmrDecoder.get24Bits() != 0x001001) {
if (JBIG2StreamDecoder.debug)
System.out.println("Missing EOFB in JBIG2 MMR bitmap data");
}
}
} else {
//ArithmeticDecoder arithmeticDecoder = ArithmeticDecoder.getInstance();
BitmapPointer cxPtr0 = new BitmapPointer(this), cxPtr1 = new BitmapPointer(this);
BitmapPointer atPtr0 = new BitmapPointer(this), atPtr1 = new BitmapPointer(this), atPtr2 = new BitmapPointer(this), atPtr3 = new BitmapPointer(this);
long ltpCX = 0;
if (typicalPredictionGenericDecodingOn) {
switch (template) {
case 0:
ltpCX = 0x3953;
break;
case 1:
ltpCX = 0x079a;
break;
case 2:
ltpCX = 0x0e3;
break;
case 3:
ltpCX = 0x18a;
break;
}
}
boolean ltp = false;
long cx, cx0, cx1, cx2;
for (int row = 0; row < height; row++) {
if (typicalPredictionGenericDecodingOn) {
int bit = arithmeticDecoder.decodeBit(ltpCX, arithmeticDecoder.genericRegionStats);
if (bit != 0) {
ltp = !ltp;
}
if (ltp) {
duplicateRow(row, row - 1);
continue;
}
}
int pixel;
switch (template) {
case 0:
cxPtr0.setPointer(0, row - 2);
cx0 = cxPtr0.nextPixel();
cx0 = (BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel();
cxPtr1.setPointer(0, row - 1);
cx1 = cxPtr1.nextPixel();
cx1 = (BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel();
cx1 = (BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel();
cx2 = 0;
atPtr0.setPointer(adaptiveTemplateX[0], row + adaptiveTemplateY[0]);
atPtr1.setPointer(adaptiveTemplateX[1], row + adaptiveTemplateY[1]);
atPtr2.setPointer(adaptiveTemplateX[2], row + adaptiveTemplateY[2]);
atPtr3.setPointer(adaptiveTemplateX[3], row + adaptiveTemplateY[3]);
for (int col = 0; col < width; col++) {
cx = (BinaryOperation.bit32Shift(cx0, 13, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx1, 8, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx2, 4, BinaryOperation.LEFT_SHIFT)) | (atPtr0.nextPixel() << 3) | (atPtr1.nextPixel() << 2) | (atPtr2.nextPixel() << 1) | atPtr3.nextPixel();
if (useSkip && skipBitmap.getPixel(col, row) != 0) {
pixel = 0;
} else {
pixel = arithmeticDecoder.decodeBit(cx, arithmeticDecoder.genericRegionStats);
if (pixel != 0) {
setPixel(col, row, 1);
}
}
cx0 = ((BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel()) & 0x07;
cx1 = ((BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel()) & 0x1f;
cx2 = ((BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | pixel) & 0x0f;
}
break;
case 1:
cxPtr0.setPointer(0, row - 2);
cx0 = cxPtr0.nextPixel();
cx0 = (BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel();
cx0 = (BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel();
cxPtr1.setPointer(0, row - 1);
cx1 = cxPtr1.nextPixel();
cx1 = (BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel();
cx1 = (BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel();
cx2 = 0;
atPtr0.setPointer(adaptiveTemplateX[0], row + adaptiveTemplateY[0]);
for (int col = 0; col < width; col++) {
cx = (BinaryOperation.bit32Shift(cx0, 9, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx1, 4, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | atPtr0.nextPixel();
if (useSkip && skipBitmap.getPixel(col, row) != 0) {
pixel = 0;
} else {
pixel = arithmeticDecoder.decodeBit(cx, arithmeticDecoder.genericRegionStats);
if (pixel != 0) {
setPixel(col, row, 1);
}
}
cx0 = ((BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel()) & 0x0f;
cx1 = ((BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel()) & 0x1f;
cx2 = ((BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | pixel) & 0x07;
}
break;
case 2:
cxPtr0.setPointer(0, row - 2);
cx0 = cxPtr0.nextPixel();
cx0 = (BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel();
cxPtr1.setPointer(0, row - 1);
cx1 = cxPtr1.nextPixel();
cx1 = (BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel();
cx2 = 0;
atPtr0.setPointer(adaptiveTemplateX[0], row + adaptiveTemplateY[0]);
for (int col = 0; col < width; col++) {
cx = (BinaryOperation.bit32Shift(cx0, 7, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx1, 3, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | atPtr0.nextPixel();
if (useSkip && skipBitmap.getPixel(col, row) != 0) {
pixel = 0;
} else {
pixel = arithmeticDecoder.decodeBit(cx, arithmeticDecoder.genericRegionStats);
if (pixel != 0) {
setPixel(col, row, 1);
}
}
cx0 = ((BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel()) & 0x07;
cx1 = ((BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel()) & 0x0f;
cx2 = ((BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | pixel) & 0x03;
}
break;
case 3:
cxPtr1.setPointer(0, row - 1);
cx1 = cxPtr1.nextPixel();
cx1 = (BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel();
cx2 = 0;
atPtr0.setPointer(adaptiveTemplateX[0], row + adaptiveTemplateY[0]);
for (int col = 0; col < width; col++) {
cx = (BinaryOperation.bit32Shift(cx1, 5, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | atPtr0.nextPixel();
if (useSkip && skipBitmap.getPixel(col, row) != 0) {
pixel = 0;
} else {
pixel = arithmeticDecoder.decodeBit(cx, arithmeticDecoder.genericRegionStats);
if (pixel != 0) {
setPixel(col, row, 1);
}
}
cx1 = ((BinaryOperation.bit32Shift(cx1, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr1.nextPixel()) & 0x1f;
cx2 = ((BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | pixel) & 0x0f;
}
break;
}
}
}
}
public void readGenericRefinementRegion(int template, boolean typicalPredictionGenericRefinementOn, JBIG2Bitmap referredToBitmap, int referenceDX, int referenceDY, short[] adaptiveTemplateX, short[] adaptiveTemplateY) throws IOException, JBIG2Exception {
//ArithmeticDecoder arithmeticDecoder = ArithmeticDecoder.getInstance();
BitmapPointer cxPtr0, cxPtr1, cxPtr2, cxPtr3, cxPtr4, cxPtr5, cxPtr6, typicalPredictionGenericRefinementCXPtr0, typicalPredictionGenericRefinementCXPtr1, typicalPredictionGenericRefinementCXPtr2;
long ltpCX;
if (template != 0) {
ltpCX = 0x008;
cxPtr0 = new BitmapPointer(this);
cxPtr1 = new BitmapPointer(this);
cxPtr2 = new BitmapPointer(referredToBitmap);
cxPtr3 = new BitmapPointer(referredToBitmap);
cxPtr4 = new BitmapPointer(referredToBitmap);
cxPtr5 = new BitmapPointer(this);
cxPtr6 = new BitmapPointer(this);
typicalPredictionGenericRefinementCXPtr0 = new BitmapPointer(referredToBitmap);
typicalPredictionGenericRefinementCXPtr1 = new BitmapPointer(referredToBitmap);
typicalPredictionGenericRefinementCXPtr2 = new BitmapPointer(referredToBitmap);
} else {
ltpCX = 0x0010;
cxPtr0 = new BitmapPointer(this);
cxPtr1 = new BitmapPointer(this);
cxPtr2 = new BitmapPointer(referredToBitmap);
cxPtr3 = new BitmapPointer(referredToBitmap);
cxPtr4 = new BitmapPointer(referredToBitmap);
cxPtr5 = new BitmapPointer(this);
cxPtr6 = new BitmapPointer(referredToBitmap);
typicalPredictionGenericRefinementCXPtr0 = new BitmapPointer(referredToBitmap);
typicalPredictionGenericRefinementCXPtr1 = new BitmapPointer(referredToBitmap);
typicalPredictionGenericRefinementCXPtr2 = new BitmapPointer(referredToBitmap);
}
long cx, cx0, cx2, cx3, cx4;
long typicalPredictionGenericRefinementCX0, typicalPredictionGenericRefinementCX1, typicalPredictionGenericRefinementCX2;
boolean ltp = false;
for (int row = 0; row < height; row++) {
if (template != 0) {
cxPtr0.setPointer(0, row - 1);
cx0 = cxPtr0.nextPixel();
cxPtr1.setPointer(-1, row);
cxPtr2.setPointer(-referenceDX, row - 1 - referenceDY);
cxPtr3.setPointer(-1 - referenceDX, row - referenceDY);
cx3 = cxPtr3.nextPixel();
cx3 = (BinaryOperation.bit32Shift(cx3, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr3.nextPixel();
cxPtr4.setPointer(-referenceDX, row + 1 - referenceDY);
cx4 = cxPtr4.nextPixel();
typicalPredictionGenericRefinementCX0 = typicalPredictionGenericRefinementCX1 = typicalPredictionGenericRefinementCX2 = 0;
if (typicalPredictionGenericRefinementOn) {
typicalPredictionGenericRefinementCXPtr0.setPointer(-1 - referenceDX, row - 1 - referenceDY);
typicalPredictionGenericRefinementCX0 = typicalPredictionGenericRefinementCXPtr0.nextPixel();
typicalPredictionGenericRefinementCX0 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX0, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr0.nextPixel();
typicalPredictionGenericRefinementCX0 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX0, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr0.nextPixel();
typicalPredictionGenericRefinementCXPtr1.setPointer(-1 - referenceDX, row - referenceDY);
typicalPredictionGenericRefinementCX1 = typicalPredictionGenericRefinementCXPtr1.nextPixel();
typicalPredictionGenericRefinementCX1 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX1, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr1.nextPixel();
typicalPredictionGenericRefinementCX1 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX1, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr1.nextPixel();
typicalPredictionGenericRefinementCXPtr2.setPointer(-1 - referenceDX, row + 1 - referenceDY);
typicalPredictionGenericRefinementCX2 = typicalPredictionGenericRefinementCXPtr2.nextPixel();
typicalPredictionGenericRefinementCX2 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX2, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr2.nextPixel();
typicalPredictionGenericRefinementCX2 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX2, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr2.nextPixel();
}
for (int col = 0; col < width; col++) {
cx0 = ((BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel()) & 7;
cx3 = ((BinaryOperation.bit32Shift(cx3, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr3.nextPixel()) & 7;
cx4 = ((BinaryOperation.bit32Shift(cx4, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr4.nextPixel()) & 3;
if (typicalPredictionGenericRefinementOn) {
typicalPredictionGenericRefinementCX0 = ((BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX0, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr0.nextPixel()) & 7;
typicalPredictionGenericRefinementCX1 = ((BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX1, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr1.nextPixel()) & 7;
typicalPredictionGenericRefinementCX2 = ((BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX2, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr2.nextPixel()) & 7;
int decodeBit = arithmeticDecoder.decodeBit(ltpCX, arithmeticDecoder.refinementRegionStats);
if (decodeBit != 0) {
ltp = !ltp;
}
if (typicalPredictionGenericRefinementCX0 == 0 && typicalPredictionGenericRefinementCX1 == 0 && typicalPredictionGenericRefinementCX2 == 0) {
setPixel(col, row, 0);
continue;
} else if (typicalPredictionGenericRefinementCX0 == 7 && typicalPredictionGenericRefinementCX1 == 7 && typicalPredictionGenericRefinementCX2 == 7) {
setPixel(col, row, 1);
continue;
}
}
cx = (BinaryOperation.bit32Shift(cx0, 7, BinaryOperation.LEFT_SHIFT)) | (cxPtr1.nextPixel() << 6) | (cxPtr2.nextPixel() << 5) | (BinaryOperation.bit32Shift(cx3, 2, BinaryOperation.LEFT_SHIFT)) | cx4;
int pixel = arithmeticDecoder.decodeBit(cx, arithmeticDecoder.refinementRegionStats);
if (pixel == 1) {
setPixel(col, row, 1);
}
}
} else {
cxPtr0.setPointer(0, row - 1);
cx0 = cxPtr0.nextPixel();
cxPtr1.setPointer(-1, row);
cxPtr2.setPointer(-referenceDX, row - 1 - referenceDY);
cx2 = cxPtr2.nextPixel();
cxPtr3.setPointer(-1 - referenceDX, row - referenceDY);
cx3 = cxPtr3.nextPixel();
cx3 = (BinaryOperation.bit32Shift(cx3, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr3.nextPixel();
cxPtr4.setPointer(-1 - referenceDX, row + 1 - referenceDY);
cx4 = cxPtr4.nextPixel();
cx4 = (BinaryOperation.bit32Shift(cx4, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr4.nextPixel();
cxPtr5.setPointer(adaptiveTemplateX[0], row + adaptiveTemplateY[0]);
cxPtr6.setPointer(adaptiveTemplateX[1] - referenceDX, row + adaptiveTemplateY[1] - referenceDY);
typicalPredictionGenericRefinementCX0 = typicalPredictionGenericRefinementCX1 = typicalPredictionGenericRefinementCX2 = 0;
if (typicalPredictionGenericRefinementOn) {
typicalPredictionGenericRefinementCXPtr0.setPointer(-1 - referenceDX, row - 1 - referenceDY);
typicalPredictionGenericRefinementCX0 = typicalPredictionGenericRefinementCXPtr0.nextPixel();
typicalPredictionGenericRefinementCX0 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX0, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr0.nextPixel();
typicalPredictionGenericRefinementCX0 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX0, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr0.nextPixel();
typicalPredictionGenericRefinementCXPtr1.setPointer(-1 - referenceDX, row - referenceDY);
typicalPredictionGenericRefinementCX1 = typicalPredictionGenericRefinementCXPtr1.nextPixel();
typicalPredictionGenericRefinementCX1 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX1, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr1.nextPixel();
typicalPredictionGenericRefinementCX1 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX1, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr1.nextPixel();
typicalPredictionGenericRefinementCXPtr2.setPointer(-1 - referenceDX, row + 1 - referenceDY);
typicalPredictionGenericRefinementCX2 = typicalPredictionGenericRefinementCXPtr2.nextPixel();
typicalPredictionGenericRefinementCX2 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX2, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr2.nextPixel();
typicalPredictionGenericRefinementCX2 = (BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX2, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr2.nextPixel();
}
for (int col = 0; col < width; col++) {
cx0 = ((BinaryOperation.bit32Shift(cx0, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr0.nextPixel()) & 3;
cx2 = ((BinaryOperation.bit32Shift(cx2, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr2.nextPixel()) & 3;
cx3 = ((BinaryOperation.bit32Shift(cx3, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr3.nextPixel()) & 7;
cx4 = ((BinaryOperation.bit32Shift(cx4, 1, BinaryOperation.LEFT_SHIFT)) | cxPtr4.nextPixel()) & 7;
if (typicalPredictionGenericRefinementOn) {
typicalPredictionGenericRefinementCX0 = ((BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX0, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr0.nextPixel()) & 7;
typicalPredictionGenericRefinementCX1 = ((BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX1, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr1.nextPixel()) & 7;
typicalPredictionGenericRefinementCX2 = ((BinaryOperation.bit32Shift(typicalPredictionGenericRefinementCX2, 1, BinaryOperation.LEFT_SHIFT)) | typicalPredictionGenericRefinementCXPtr2.nextPixel()) & 7;
int decodeBit = arithmeticDecoder.decodeBit(ltpCX, arithmeticDecoder.refinementRegionStats);
if (decodeBit == 1) {
ltp = !ltp;
}
if (typicalPredictionGenericRefinementCX0 == 0 && typicalPredictionGenericRefinementCX1 == 0 && typicalPredictionGenericRefinementCX2 == 0) {
setPixel(col, row, 0);
continue;
} else if (typicalPredictionGenericRefinementCX0 == 7 && typicalPredictionGenericRefinementCX1 == 7 && typicalPredictionGenericRefinementCX2 == 7) {
setPixel(col, row, 1);
continue;
}
}
cx = (BinaryOperation.bit32Shift(cx0, 11, BinaryOperation.LEFT_SHIFT)) | (cxPtr1.nextPixel() << 10) | (BinaryOperation.bit32Shift(cx2, 8, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx3, 5, BinaryOperation.LEFT_SHIFT)) | (BinaryOperation.bit32Shift(cx4, 2, BinaryOperation.LEFT_SHIFT)) | (cxPtr5.nextPixel() << 1) | cxPtr6.nextPixel();
int pixel = arithmeticDecoder.decodeBit(cx, arithmeticDecoder.refinementRegionStats);
if (pixel == 1) {
setPixel(col, row, 1);
}
}
}
}
}
public void readTextRegion(boolean huffman, boolean symbolRefine, int noOfSymbolInstances, int logStrips, int noOfSymbols, int[][] symbolCodeTable, int symbolCodeLength, JBIG2Bitmap[] symbols, int defaultPixel, int combinationOperator, boolean transposed, int referenceCorner, int sOffset, int[][] huffmanFSTable, int[][] huffmanDSTable, int[][] huffmanDTTable, int[][] huffmanRDWTable, int[][] huffmanRDHTable, int[][] huffmanRDXTable, int[][] huffmanRDYTable, int[][] huffmanRSizeTable, int template, short[] symbolRegionAdaptiveTemplateX,
short[] symbolRegionAdaptiveTemplateY, JBIG2StreamDecoder decoder) throws JBIG2Exception, IOException {
JBIG2Bitmap symbolBitmap;
int strips = 1 << logStrips;
clear(defaultPixel);
//HuffmanDecoder huffDecoder = HuffmanDecoder.getInstance();
//ArithmeticDecoder arithmeticDecoder = ArithmeticDecoder.getInstance();
int t;
if (huffman) {
t = huffmanDecoder.decodeInt(huffmanDTTable).intResult();
} else {
t = arithmeticDecoder.decodeInt(arithmeticDecoder.iadtStats).intResult();
}
t *= -strips;
int currentInstance = 0;
int firstS = 0;
int dt, tt, ds, s;
while (currentInstance < noOfSymbolInstances) {
if (huffman) {
dt = huffmanDecoder.decodeInt(huffmanDTTable).intResult();
} else {
dt = arithmeticDecoder.decodeInt(arithmeticDecoder.iadtStats).intResult();
}
t += dt * strips;
if (huffman) {
ds = huffmanDecoder.decodeInt(huffmanFSTable).intResult();
} else {
ds = arithmeticDecoder.decodeInt(arithmeticDecoder.iafsStats).intResult();
}
firstS += ds;
s = firstS;
while (true) {
if (strips == 1) {
dt = 0;
} else if (huffman) {
dt = decoder.readBits(logStrips);
} else {
dt = arithmeticDecoder.decodeInt(arithmeticDecoder.iaitStats).intResult();
}
tt = t + dt;
long symbolID;
if (huffman) {
if (symbolCodeTable != null) {
symbolID = huffmanDecoder.decodeInt(symbolCodeTable).intResult();
} else {
symbolID = decoder.readBits(symbolCodeLength);
}
} else {
symbolID = arithmeticDecoder.decodeIAID(symbolCodeLength, arithmeticDecoder.iaidStats);
}
if (symbolID >= noOfSymbols) {
if (JBIG2StreamDecoder.debug)
System.out.println("Invalid symbol number in JBIG2 text region");
} else {
symbolBitmap = null;
int ri;
if (symbolRefine) {
if (huffman) {
ri = decoder.readBit();
} else {
ri = arithmeticDecoder.decodeInt(arithmeticDecoder.iariStats).intResult();
}
} else {
ri = 0;
}
if (ri != 0) {
int refinementDeltaWidth, refinementDeltaHeight, refinementDeltaX, refinementDeltaY;
if (huffman) {
refinementDeltaWidth = huffmanDecoder.decodeInt(huffmanRDWTable).intResult();
refinementDeltaHeight = huffmanDecoder.decodeInt(huffmanRDHTable).intResult();
refinementDeltaX = huffmanDecoder.decodeInt(huffmanRDXTable).intResult();
refinementDeltaY = huffmanDecoder.decodeInt(huffmanRDYTable).intResult();
decoder.consumeRemainingBits();
arithmeticDecoder.start();
} else {
refinementDeltaWidth = arithmeticDecoder.decodeInt(arithmeticDecoder.iardwStats).intResult();
refinementDeltaHeight = arithmeticDecoder.decodeInt(arithmeticDecoder.iardhStats).intResult();
refinementDeltaX = arithmeticDecoder.decodeInt(arithmeticDecoder.iardxStats).intResult();
refinementDeltaY = arithmeticDecoder.decodeInt(arithmeticDecoder.iardyStats).intResult();
}
refinementDeltaX = ((refinementDeltaWidth >= 0) ? refinementDeltaWidth : refinementDeltaWidth - 1) / 2 + refinementDeltaX;
refinementDeltaY = ((refinementDeltaHeight >= 0) ? refinementDeltaHeight : refinementDeltaHeight - 1) / 2 + refinementDeltaY;
symbolBitmap = new JBIG2Bitmap(refinementDeltaWidth + symbols[(int) symbolID].width, refinementDeltaHeight + symbols[(int) symbolID].height, arithmeticDecoder, huffmanDecoder, mmrDecoder);
symbolBitmap.readGenericRefinementRegion(template, false, symbols[(int) symbolID], refinementDeltaX, refinementDeltaY, symbolRegionAdaptiveTemplateX, symbolRegionAdaptiveTemplateY);
} else {
symbolBitmap = symbols[(int) symbolID];
}
int bitmapWidth = symbolBitmap.width - 1;
int bitmapHeight = symbolBitmap.height - 1;
if (transposed) {
switch (referenceCorner) {
case 0: // bottom left
combine(symbolBitmap, tt, s, combinationOperator);
break;
case 1: // top left
combine(symbolBitmap, tt, s, combinationOperator);
break;
case 2: // bottom right
combine(symbolBitmap, (tt - bitmapWidth), s, combinationOperator);
break;
case 3: // top right
combine(symbolBitmap, (tt - bitmapWidth), s, combinationOperator);
break;
}
s += bitmapHeight;
} else {
switch (referenceCorner) {
case 0: // bottom left
combine(symbolBitmap, s, (tt - bitmapHeight), combinationOperator);
break;
case 1: // top left
combine(symbolBitmap, s, tt, combinationOperator);
break;
case 2: // bottom right
combine(symbolBitmap, s, (tt - bitmapHeight), combinationOperator);
break;
case 3: // top right
combine(symbolBitmap, s, tt, combinationOperator);
break;
}
s += bitmapWidth;
}
}
currentInstance++;
DecodeIntResult decodeIntResult;
if (huffman) {
decodeIntResult = huffmanDecoder.decodeInt(huffmanDSTable);
} else {
decodeIntResult = arithmeticDecoder.decodeInt(arithmeticDecoder.iadsStats);
}
if (!decodeIntResult.booleanResult()) {
break;
}
ds = decodeIntResult.intResult();
s += sOffset + ds;
}
}
}
public void clear(int defPixel) {
// if (useByteArray) {
newData = new byte[newData.length];
byte value = defPixel==0 ? (byte)0 : (byte)-128;
for (int i=0; i< newData.length; i++) {
newData[i]=value;
}
// } else {
// data.set(0, data.size(), defPixel == 1);
// }
}
public void combine(JBIG2Bitmap bitmap, int x, int y, long combOp) {
int srcWidth = bitmap.width;
int srcHeight = bitmap.height;
int srcRow = 0, srcCol = 0;
// int maxRow = y + srcHeight;
// int maxCol = x + srcWidth;
//
// for (int row = y; row < maxRow; row++) {
// for (int col = x; col < maxCol; srcCol += 8, col += 8) {
//
// byte srcPixelByte = bitmap.getPixelByte(srcCol, srcRow);
// byte dstPixelByte = getPixelByte(col, row);
// byte endPixelByte;
//
// switch ((int) combOp) {
// case 0: // or
// endPixelByte = (byte) (dstPixelByte | srcPixelByte);
// break;
// case 1: // and
// endPixelByte = (byte) (dstPixelByte & srcPixelByte);
// break;
// case 2: // xor
// endPixelByte = (byte) (dstPixelByte ^ srcPixelByte);
// break;
// case 3: // xnor
// endPixelByte = (byte) ~(dstPixelByte ^ srcPixelByte);
// break;
// case 4: // replace
// default:
// endPixelByte = srcPixelByte;
// break;
// }
// int used = maxCol - col;
// if (used < 8) {
// // mask bits
// endPixelByte = (byte) ((endPixelByte & (0xFF >> (8 - used))) | (dstPixelByte & (0xFF << (used))));
// }
// setPixelByte(col, row, endPixelByte);
// }
//
// srcCol = 0;
// srcRow++;
for (int row = y; row < y + srcHeight; row++) {
for (int col = x; col < x + srcWidth; col++) {
int srcPixel = bitmap.getPixel(srcCol, srcRow);
switch ((int) combOp) {
case 0: // or
setPixel(col, row, getPixel(col, row, line, newData) | srcPixel);
break;
case 1: // and
setPixel(col, row, getPixel(col, row, line, newData) & srcPixel);
break;
case 2: // xor
setPixel(col, row, getPixel(col, row, line, newData) ^ srcPixel);
break;
case 3: // xnor
if ((getPixel(col, row, line, newData) == 1 && srcPixel == 1) || (getPixel(col, row, line, newData) == 0 && srcPixel == 0))
setPixel(col, row, 1);
else
setPixel(col, row, 0);
break;
case 4: // replace
setPixel(col, row, srcPixel);
break;
}
srcCol++;
}
srcCol = 0;
srcRow++;
}
}
/**
* set a full byte of pixels
*/
// private void setPixelByte(int col, int row, byte bits) {
//data.setByte(row, col, bits);
// }
/**
* get a byte of pixels
*/
// public byte getPixelByte(int col, int row) {
//return data.getByte(row, col);
// }
private void duplicateRow(int yDest, int ySrc) {
// for (int i = 0; i < width;) {
// setPixelByte(i, yDest, getPixelByte(i, ySrc));
// i += 8;
// }
for (int i = 0; i < width; i++) {
setPixel(i, yDest, getPixel(i, ySrc, line, newData));
}
}
public int getWidth() {
return width;
}
public int getHeight() {
return height;
}
public byte[] getData(boolean switchPixelColor) {
// byte[] bytes = new byte[height * line];
//
// for (int i = 0; i < height; i++) {
// System.arraycopy(data.bytes[i], 0, bytes, line * i, line);
// }
//
// for (int i = 0; i < bytes.length; i++) {
// // reverse bits
//
// int value = bytes[i];
// value = (value & 0x0f) << 4 | (value & 0xf0) >> 4;
// value = (value & 0x33) << 2 | (value & 0xcc) >> 2;
// value = (value & 0x55) << 1 | (value & 0xaa) >> 1;
//
// if (switchPixelColor) {
// value ^= 0xff;
// }
//
// bytes[i] = (byte) (value & 0xFF);
// }
//
// return bytes;
byte[] bytes;
// if (useByteArray) {
bytes = newData;
// } else {
// bytes = new byte[height * line];
//
// int count = 0, offset = 0;
// for (int row = 0; row < height; row++) {
// for (int col = 0; col < width; col++) {
// if (data.get(count)) {
// int bite = (count + offset) / 8;
// int bit = (count + offset) % 8;
//
// bytes[bite] |= 1 << (7 - bit);
// }
// count++;
// }
//
// offset = (line * 8 * (row + 1)) - count;
// }
// }
if (switchPixelColor) {
for (int i = 0; i < bytes.length; i++) {
bytes[i] ^= 0xff;
}
}
return bytes;
}
public JBIG2Bitmap getSlice(int x, int y, int width, int height) {
// JBIG2Bitmap slice = new JBIG2Bitmap(width, height);
//
// int sliceRow = 0, sliceCol = 0;
// int maxCol = x + width;
//
// //ShowGUIMessage.showGUIMessage("x", this.getBufferedImage(), "xx");
//
// System.out.println(">>> getSlice x = "+x+" y = "+y+ " width = "+width+ " height = "+height);
// System.out.println(">>> baseImage width = "+this.width+ " height = "+this.height);
//
// System.out.println("counter = "+counter);
// if(counter == 17){
// System.out.println();
// //ShowGUIMessage.showGUIMessage("x", this.getBufferedImage(), "xx");
// }
//
// ShowGUIMessage.showGUIMessage("x", this.getBufferedImage(), "xx");
//
// for (int row = y; row < height; row++) {
// for (int col = x; col < maxCol; col += 8, sliceCol += 8) {
// slice.setPixelByte(sliceCol, sliceRow, getPixelByte(col, row));
// //if(counter > 10)
// //ShowGUIMessage.showGUIMessage("new", slice.getBufferedImage(), "new");
// }
// sliceCol = 0;
// sliceRow++;
// }
// counter++;
//
// ShowGUIMessage.showGUIMessage("new", slice.getBufferedImage(), "new");
//
// return slice;
JBIG2Bitmap slice = new JBIG2Bitmap(width, height, arithmeticDecoder, huffmanDecoder, mmrDecoder);
int sliceRow = 0, sliceCol = 0;
for (int row = y; row < height; row++) {
for (int col = x; col < x + width; col++) {
//System.out.println("row = "+row +" column = "+col);
slice.setPixel(sliceCol, sliceRow, getPixel(col, row, line, newData));
sliceCol++;
}
sliceCol = 0;
sliceRow++;
}
return slice;
}
/**
private static void setPixel(int col, int row, FastBitSet data, int value) {
if (value == 1)
data.set(row, col);
else
data.clear(row, col);
}/**/
// private void setPixelByte(int col, int row, FastBitSet data, byte bits) {
// data.setByte(row, col, bits);
// }
// public void setPixel(int col, int row, int value) {
// setPixel(col, row, data, value);
// }
// public int getPixel(int col, int row) {
// return data.get(row, col) ? 1 : 0;
// }
// private void setPixel(int col, int row, BitSet data, int value) {
// int index = (row * width) + col;
//
// data.set(index, value == 1);
// }
private void newSetPixel(int col, int row, byte[] data, int value) {
int index = (row * line) + (col / 8);
int b = data[index];
if (value==0)
b = b & ~(1 << 7-(col%8));
else
b = b | (1 << 7-(col%8));
data[index] = (byte)b;
}
public void setPixel(int col, int row, int value) {
// if (useByteArray)
newSetPixel(col,row,newData,value);
// else
// setPixel(col, row, data, value);
}
private final static int getPixel(int col, int row, int line, byte[] data) {
return (data[(row * line) + (col / 8)] & 1 << 7-(col%8)) != 0 ? 1 : 0;
}
public int getPixel(int col, int row) {
// if (useByteArray)
// return getPixel(col,row,line,newData);
return (newData[(row * line) + (col / 8)] & 1 << 7-(col%8)) != 0 ? 1 : 0;
// else
// return data.get((row * width) + col) ? 1 : 0;
}
public void expand(int newHeight, int defaultPixel) {
// System.out.println("expand FastBitSet");
// FastBitSet newData = new FastBitSet(width, newHeight);
//
// for (int row = 0; row < height; row++) {
// for (int col = 0; col < width; col += 8) {
// setPixelByte(col, row, newData, getPixelByte(col, row));
// }
// }
//
// this.height = newHeight;
// this.data = newData;
// if (useByteArray) {
byte[] newNewData = new byte[newHeight * line];
System.arraycopy(newData,0,newNewData,0,height*line);
this.height = newHeight;
this.newData = newNewData;
// } else {
//
// BitSet newData = new BitSet(newHeight * width);
//
// for (int row = 0; row < height; row++) {
// for (int col = 0; col < width; col++) {
// setPixel(col, row, newData, getPixel(col, row));
// }
// }
//
// this.height = newHeight;
// this.data = newData;
// }
}
public void setBitmapNumber(int segmentNumber) {
this.bitmapNumber = segmentNumber;
}
public int getBitmapNumber() {
return bitmapNumber;
}
public BufferedImage getBufferedImage() {
byte[] bytes = getData(true);
if (bytes == null)
return null;
// make a a DEEP copy so we can't alter
int len = bytes.length;
byte[] copy = new byte[len];
System.arraycopy(bytes, 0, copy, 0, len);
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_BINARY);
/** create an image from the raw data */
DataBuffer db = new DataBufferByte(copy, copy.length);
WritableRaster raster = Raster.createPackedRaster(db, width, height, 1, null);
image.setData(raster);
return image;
}
static final class FastBitSet {
byte[][] bytes;
int w, h;
public FastBitSet(int width, int height) {
bytes = new byte[height][(width + 7) / 8];
this.w = width;
this.h = height;
//System.out.println("width = "+width+" height = "+height);
}
// public int getByte(int row, int col) {
//
// System.out.println("(width + 7) / 8 = " + (width + 7) / 8);
// System.out.println("external width = " + width + " external height = " + height);
// System.out.println("internal width = " + w + " internal height = " + h);
// System.out.println("row = " + row + " column = " + col);
//
// int offset = col / 8;
// int mod = col % 8;
//
// System.out.println("offset = " + offset + " mod = " + mod+" bytes[row].length = "+bytes[row].length);
//
// if (mod == 0)
// return bytes[row][offset];
//
// if(offset == bytes[row].length - 1){
// System.out.println("returning");
// return ((bytes[row][offset] & 0xFF) >> mod);
// }
//
// int left = ((bytes[row][offset] & 0xFF) >> mod);
// int right = ((bytes[row][offset + 1] & 0xFF) << (8 - mod));
//
// return left | right;
// }
// public void setByte(int row, int col, int bits) {
// int offset = col / 8;
// int mod = col % 8;
//
// System.out.println("setByte offset = " + offset + " mod = " + mod);
//
//
// if (mod == 0)
// bytes[row][offset] = (byte) bits;
// else {
// int mask = 0xFF >> (8 - mod);
// System.out.println("setByte mask = " + mask);
// bytes[row][offset] = (byte) ((bytes[row][offset] & mask) | ((bits & 0xFF) << mod));
// bytes[row][offset + 1] = (byte) ((bytes[row][offset + 1] & ~mask) | ((bits & 0xFF) >> (8 - mod)));
// }
// }
public byte getByte(int row, int col) {
// System.out.println("(width + 7) / 8 = " + (width + 7) / 8);
// System.out.println("external width = " + width + " external height = " + height);
// System.out.println("internal width = " + w + " internal height = " + h);
// System.out.println("row = " + row + " column = " + col);
int offset = col / 8;
int mod = col % 8;
// System.out.println("offset = " + offset + " mod = " + mod+" bytes[row].length = "+bytes[row].length);
if (mod == 0)
return bytes[row][offset];
// if(offset == bytes[row].length - 1){
// System.out.println("returning");
// return ((bytes[row][offset] & 0xFF) >> mod);
// }
byte leftMask = (byte) (0xFF >> (8 - mod));
byte rightMask = (byte) (0xFF << mod);
byte left = (byte) ((bytes[row][offset] & leftMask) << (8 - mod));
if(offset + 1 >= bytes[row].length){
System.out.println("returning");
return left;
}
byte right = (byte) ((bytes[row][offset + 1] & rightMask) >> mod);
return (byte) (left | right);
}
public void setByte(int row, int col, byte bits) {
int offset = col / 8;
int mod = col % 8;
//System.out.println("setByte offset = " + offset + " mod = " + mod);
if (mod == 0)
bytes[row][offset] = (byte) bits;
else {
byte left = (byte) (bits >> mod);
byte leftMask = (byte) (0xFF << (8 - mod));
bytes[row][offset] &= leftMask;
bytes[row][offset] |= left;
if(offset + 1 >= bytes[row].length)
return;
byte right = (byte) (bits << (8 - mod));
byte rightMask = (byte) (0xFF >> mod);
bytes[row][offset + 1] &= rightMask;
bytes[row][offset + 1] |= right;
// int mask = 0xFF >> (8 - mod);
// System.out.println("setByte mask = " + mask);
// bytes[row][offset] = (byte) ((bytes[row][offset] & mask) | ((bits & 0xFF) << mod));
// bytes[row][offset + 1] = (byte) ((bytes[row][offset + 1] & ~mask) | ((bits & 0xFF) >> (8 - mod)));
}
}
public void set(int row, int col) {
byte bit = (byte) (1 << (col % 8));
bytes[row][col / 8] |= bit;
}
public void clear(int row, int col) {
byte bit = (byte) (1 << (col % 8));
bytes[row][col / 8] &= ~bit;
}
public boolean get(int row, int col) {
byte bit = (byte) (1 << (col % 8));
return (bytes[row][col / 8] & bit) != 0;
}
public void reset(boolean set) {
for (int i = 0; i < bytes.length; i++)
Arrays.fill(bytes[i], set ? (byte) 0xFF : (byte) 0x00);
}
}
}