public BitmapPointer(JBIG2Bitmap bitmap)
{
this.bitmap = bitmap;
this.height = bitmap.getHeight();
this.width = bitmap.getWidth();
}
public JBIG2Bitmap GetPageAsJBIG2Bitmap(int i)
{
JBIG2Bitmap pageBitmap = FindPageSegement(1).GetPageBitmap();
return(pageBitmap);
}
public override void ReadSegment()
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("==== Read Segment Symbol Dictionary ====");
}
/** read symbol dictionary flags */
ReadSymbolDictionaryFlags();
//List codeTables = new ArrayList();
int numberOfInputSymbols = 0;
int noOfReferredToSegments = segmentHeader.GetReferredToSegmentCount();
int[] referredToSegments = segmentHeader.GetReferredToSegments();
long i; // i = 0;
for (i = 0; i < noOfReferredToSegments; i++)
{
Segment seg = decoder.FindSegment(referredToSegments[i]);
int type = seg.GetSegmentHeader().GetSegmentType();
if (type == Segment.SYMBOL_DICTIONARY)
{
numberOfInputSymbols += ((SymbolDictionarySegment)seg).noOfExportedSymbols;
}
else if (type == Segment.TABLES)
{
//codeTables.add(seg);
}
}
int symbolCodeLength = 0;
i = 1;
while (i < numberOfInputSymbols + noOfNewSymbols)
{
symbolCodeLength++;
i <<= 1;
}
JBIG2Bitmap[] bitmaps = new JBIG2Bitmap[numberOfInputSymbols + noOfNewSymbols];
long j, k = 0;
SymbolDictionarySegment inputSymbolDictionary = null;
for (i = 0; i < noOfReferredToSegments; i++)
{
Segment seg = decoder.FindSegment(referredToSegments[i]);
if (seg.GetSegmentHeader().GetSegmentType() == Segment.SYMBOL_DICTIONARY)
{
inputSymbolDictionary = (SymbolDictionarySegment)seg;
for (j = 0; j < inputSymbolDictionary.noOfExportedSymbols; j++)
{
bitmaps[k++] = inputSymbolDictionary.bitmaps[j];
}
}
}
long[,] huffmanDHTable = null;
long[,] huffmanDWTable = null;
long[,] huffmanBMSizeTable = null;
long[,] huffmanAggInstTable = null;
bool sdHuffman = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_HUFF) != 0;
int sdHuffmanDifferenceHeight = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_HUFF_DH);
int sdHuffmanDiferrenceWidth = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_HUFF_DW);
int sdHuffBitmapSize = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_HUFF_BM_SIZE);
int sdHuffAggregationInstances = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_HUFF_AGG_INST);
i = 0;
if (sdHuffman)
{
if (sdHuffmanDifferenceHeight == 0)
{
huffmanDHTable = HuffmanDecoder.huffmanTableD;
}
else if (sdHuffmanDifferenceHeight == 1)
{
huffmanDHTable = HuffmanDecoder.huffmanTableE;
}
else
{
//huffmanDHTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
if (sdHuffmanDiferrenceWidth == 0)
{
huffmanDWTable = HuffmanDecoder.huffmanTableB;
}
else if (sdHuffmanDiferrenceWidth == 1)
{
huffmanDWTable = HuffmanDecoder.huffmanTableC;
}
else
{
//huffmanDWTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
if (sdHuffBitmapSize == 0)
{
huffmanBMSizeTable = HuffmanDecoder.huffmanTableA;
}
else
{
//huffmanBMSizeTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
if (sdHuffAggregationInstances == 0)
{
huffmanAggInstTable = HuffmanDecoder.huffmanTableA;
}
else
{
//huffmanAggInstTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
}
int contextUsed = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.BITMAP_CC_USED);
int sdTemplate = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_TEMPLATE);
if (!sdHuffman)
{
if (contextUsed != 0 && inputSymbolDictionary != null)
{
arithmeticDecoder.ResetGenericStats(sdTemplate, inputSymbolDictionary.genericRegionStats);
}
else
{
arithmeticDecoder.ResetGenericStats(sdTemplate, null);
}
arithmeticDecoder.ResetIntStats(symbolCodeLength);
arithmeticDecoder.Start();
}
int sdRefinementAggregate = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_REF_AGG);
int sdRefinementTemplate = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.SD_R_TEMPLATE);
if (sdRefinementAggregate != 0)
{
if (contextUsed != 0 && inputSymbolDictionary != null)
{
arithmeticDecoder.ResetRefinementStats(sdRefinementTemplate, inputSymbolDictionary.refinementRegionStats);
}
else
{
arithmeticDecoder.ResetRefinementStats(sdRefinementTemplate, null);
}
}
long[] deltaWidths = new long[noOfNewSymbols];
long deltaHeight = 0;
i = 0;
while (i < noOfNewSymbols)
{
long instanceDeltaHeight; // instanceDeltaHeight = 0;
if (sdHuffman)
{
instanceDeltaHeight = huffmanDecoder.DecodeInt(huffmanDHTable).IntResult();
}
else
{
instanceDeltaHeight = arithmeticDecoder.DecodeInt(arithmeticDecoder.iadhStats).IntResult();
}
if (instanceDeltaHeight < 0 && -instanceDeltaHeight >= deltaHeight)
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Bad delta-height value in JBIG2 symbol dictionary");
}
}
deltaHeight += instanceDeltaHeight;
long symbolWidth = 0;
long totalWidth = 0;
j = i;
while (true)
{
long deltaWidth = 0;
DecodeIntResult decodeIntResult;
if (sdHuffman)
{
decodeIntResult = huffmanDecoder.DecodeInt(huffmanDWTable);
}
else
{
decodeIntResult = arithmeticDecoder.DecodeInt(arithmeticDecoder.iadwStats);
}
if (!decodeIntResult.BooleanResult())
{
break;
}
deltaWidth = decodeIntResult.IntResult();
if (deltaWidth < 0 && -deltaWidth >= symbolWidth)
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Bad delta-width value in JBIG2 symbol dictionary");
}
}
symbolWidth += deltaWidth;
if (sdHuffman && sdRefinementAggregate == 0)
{
deltaWidths[i] = symbolWidth;
totalWidth += symbolWidth;
}
else if (sdRefinementAggregate == 1)
{
long refAggNum; //refAggNum = 0;
if (sdHuffman)
{
refAggNum = huffmanDecoder.DecodeInt(huffmanAggInstTable).IntResult();
}
else
{
refAggNum = arithmeticDecoder.DecodeInt(arithmeticDecoder.iaaiStats).IntResult();
}
if (refAggNum == 1)
{
//long symbolID = 0, referenceDX = 0, referenceDY = 0;
long symbolID, referenceDX, referenceDY;
if (sdHuffman)
{
symbolID = decoder.ReadBits(symbolCodeLength);
referenceDX = huffmanDecoder.DecodeInt(HuffmanDecoder.huffmanTableO).IntResult();
referenceDY = huffmanDecoder.DecodeInt(HuffmanDecoder.huffmanTableO).IntResult();
decoder.ConsumeRemainingBits();
arithmeticDecoder.Start();
}
else
{
symbolID = (int)arithmeticDecoder.DecodeIAID(symbolCodeLength, arithmeticDecoder.iaidStats);
referenceDX = arithmeticDecoder.DecodeInt(arithmeticDecoder.iardxStats).IntResult();
referenceDY = arithmeticDecoder.DecodeInt(arithmeticDecoder.iardyStats).IntResult();
}
JBIG2Bitmap referredToBitmap = bitmaps[symbolID];
JBIG2Bitmap bitmap = new JBIG2Bitmap(symbolWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.ReadGenericRefinementRegion(sdRefinementTemplate, false, referredToBitmap, referenceDX, referenceDY, symbolDictionaryRAdaptiveTemplateX,
symbolDictionaryRAdaptiveTemplateY);
bitmaps[numberOfInputSymbols + i] = bitmap;
}
else
{
JBIG2Bitmap bitmap = new JBIG2Bitmap(symbolWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.ReadTextRegion(sdHuffman, true, refAggNum, 0, numberOfInputSymbols + i, null, symbolCodeLength, bitmaps, 0, 0, false, 1, 0,
HuffmanDecoder.huffmanTableF, HuffmanDecoder.huffmanTableH, HuffmanDecoder.huffmanTableK, HuffmanDecoder.huffmanTableO, HuffmanDecoder.huffmanTableO,
HuffmanDecoder.huffmanTableO, HuffmanDecoder.huffmanTableO, HuffmanDecoder.huffmanTableA, sdRefinementTemplate, symbolDictionaryRAdaptiveTemplateX,
symbolDictionaryRAdaptiveTemplateY, decoder);
bitmaps[numberOfInputSymbols + i] = bitmap;
}
}
else
{
JBIG2Bitmap bitmap = new JBIG2Bitmap(symbolWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.ReadBitmap(false, sdTemplate, false, false, null, symbolDictionaryAdaptiveTemplateX, symbolDictionaryAdaptiveTemplateY, 0);
bitmaps[numberOfInputSymbols + i] = bitmap;
}
i++;
}
if (sdHuffman && sdRefinementAggregate == 0)
{
long bmSize = huffmanDecoder.DecodeInt(huffmanBMSizeTable).IntResult();
decoder.ConsumeRemainingBits();
JBIG2Bitmap collectiveBitmap = new JBIG2Bitmap(totalWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
if (bmSize == 0)
{
long padding = totalWidth % 8;
long bytesPerRow = (int)Math.Ceiling(totalWidth / 8d);
//short[] bitmap = new short[totalWidth];
//decoder.readbyte(bitmap);
long size = deltaHeight * ((totalWidth + 7) >> 3);
short[] bitmap = new short[size];
decoder.Readbyte(bitmap);
short[][] logicalMap = new short[deltaHeight][];
int count = 0;
for (int row = 0; row < deltaHeight; row++)
{
for (int col = 0; col < bytesPerRow; col++)
{
logicalMap[row][col] = bitmap[count];
count++;
}
}
int collectiveBitmapRow = 0, collectiveBitmapCol = 0;
for (int row = 0; row < deltaHeight; row++)
{
for (int col = 0; col < bytesPerRow; col++)
{
if (col == (bytesPerRow - 1))
{ // this is the last
// byte in the row
short currentbyte = logicalMap[row][col];
for (int bitPointer = 7; bitPointer >= padding; bitPointer--)
{
short mask = (short)(1 << bitPointer);
int bit = (currentbyte & mask) >> bitPointer;
collectiveBitmap.SetPixel(collectiveBitmapCol, collectiveBitmapRow, bit);
collectiveBitmapCol++;
}
collectiveBitmapRow++;
collectiveBitmapCol = 0;
}
else
{
short currentbyte = logicalMap[row][col];
for (int bitPointer = 7; bitPointer >= 0; bitPointer--)
{
short mask = (short)(1 << bitPointer);
int bit = (currentbyte & mask) >> bitPointer;
collectiveBitmap.SetPixel(collectiveBitmapCol, collectiveBitmapRow, bit);
collectiveBitmapCol++;
}
}
}
}
}
else
{
collectiveBitmap.ReadBitmap(true, 0, false, false, null, null, null, bmSize);
}
long x = 0;
while (j < i)
{
bitmaps[numberOfInputSymbols + j] = collectiveBitmap.GetSlice(x, 0, deltaWidths[j], deltaHeight);
x += deltaWidths[j];
j++;
}
}
}
this.bitmaps = new JBIG2Bitmap[noOfExportedSymbols];
j = i = 0;
bool export = false;
while (i < numberOfInputSymbols + noOfNewSymbols)
{
//long run = 0;
long run;
if (sdHuffman)
{
run = huffmanDecoder.DecodeInt(HuffmanDecoder.huffmanTableA).IntResult();
}
else
{
run = arithmeticDecoder.DecodeInt(arithmeticDecoder.iaexStats).IntResult();
}
if (export)
{
for (int cnt = 0; cnt < run; cnt++)
{
this.bitmaps[j++] = bitmaps[i++];
}
}
else
{
i += run;
}
export = !export;
}
int contextRetained = symbolDictionaryFlags.GetFlagValue(SymbolDictionaryFlags.BITMAP_CC_RETAINED);
if (!sdHuffman && contextRetained == 1)
{
genericRegionStats = genericRegionStats.Copy();
if (sdRefinementAggregate == 1)
{
refinementRegionStats = refinementRegionStats.Copy();
}
}
/** consume any remaining bits */
decoder.ConsumeRemainingBits();
}
public override void ReadSegment()
{
/** read text region Segment flags */
ReadPatternDictionaryFlags();
width = decoder.Readbyte();
height = decoder.Readbyte();
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("pattern dictionary size = " + width + " , " + height);
}
short[] buf = new short[4];
decoder.Readbyte(buf);
grayMax = BinaryOperation.GetInt32(buf);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("grey max = " + grayMax);
}
bool useMMR = patternDictionaryFlags.GetFlagValue(PatternDictionaryFlags.HD_MMR) == 1;
int template = patternDictionaryFlags.GetFlagValue(PatternDictionaryFlags.HD_TEMPLATE);
if (!useMMR)
{
arithmeticDecoder.ResetGenericStats(template, null);
arithmeticDecoder.Start();
}
short[] genericBAdaptiveTemplateX = new short[4], genericBAdaptiveTemplateY = new short[4];
genericBAdaptiveTemplateX[0] = (short)-width;
genericBAdaptiveTemplateY[0] = 0;
genericBAdaptiveTemplateX[1] = -3;
genericBAdaptiveTemplateY[1] = -1;
genericBAdaptiveTemplateX[2] = 2;
genericBAdaptiveTemplateY[2] = -2;
genericBAdaptiveTemplateX[3] = -2;
genericBAdaptiveTemplateY[3] = -2;
size = grayMax + 1;
JBIG2Bitmap bitmap = new JBIG2Bitmap(size * width, height, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.Clear(0);
bitmap.ReadBitmap(useMMR, template, false, false, null, genericBAdaptiveTemplateX, genericBAdaptiveTemplateY, segmentHeader.GetSegmentDataLength() - 7);
JBIG2Bitmap[] bitmaps = new JBIG2Bitmap[size];
int x = 0;
for (int i = 0; i < size; i++)
{
bitmaps[i] = bitmap.GetSlice(x, 0, width, height);
x += width;
}
this.bitmaps = bitmaps;
}
public void AppendBitmap(JBIG2Bitmap bitmap)
{
bitmaps.Add(bitmap);
}
public override void readSegment()
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("==== Reading Text Region ====");
}
base.readSegment();
/** read text region Segment flags */
readTextRegionFlags();
short[] buff = new short[4];
decoder.readbyte(buff);
long noOfSymbolInstances = BinaryOperation.getInt32(buff);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("noOfSymbolInstances = " + noOfSymbolInstances);
}
int noOfReferredToSegments = segmentHeader.getReferredToSegmentCount();
int[] referredToSegments = segmentHeader.getReferredToSegments();
//List codeTables = new ArrayList();
List <Segment> segmentsReferenced = new List <Segment>();
long noOfSymbols = 0;
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("noOfReferredToSegments = " + noOfReferredToSegments);
}
int i = 0;
for (i = 0; i < noOfReferredToSegments; i++)
{
Segment seg = decoder.findSegment(referredToSegments[i]);
int type = seg.getSegmentHeader().getSegmentType();
if (type == Segment.SYMBOL_DICTIONARY)
{
segmentsReferenced.Add(seg);
noOfSymbols += ((SymbolDictionarySegment)seg).getNoOfExportedSymbols();
}
else if (type == Segment.TABLES)
{
//codeTables.add(seg);
}
}
long symbolCodeLength = 0;
int count = 1;
while (count < noOfSymbols)
{
symbolCodeLength++;
count <<= 1;
}
int currentSymbol = 0;
JBIG2Bitmap[] symbols = new JBIG2Bitmap[noOfSymbols];
foreach (Segment it in segmentsReferenced)
{
if (it.getSegmentHeader().getSegmentType() == Segment.SYMBOL_DICTIONARY)
{
JBIG2Bitmap[] bitmaps = ((SymbolDictionarySegment)it).getBitmaps();
for (int j = 0; j < bitmaps.Length; j++)
{
symbols[currentSymbol] = bitmaps[j];
currentSymbol++;
}
}
}
long[,] huffmanFSTable = null;
long[,] huffmanDSTable = null;
long[,] huffmanDTTable = null;
long[,] huffmanRDWTable = null;
long[,] huffmanRDHTable = null;
long[,] huffmanRDXTable = null;
long[,] huffmanRDYTable = null;
long[,] huffmanRSizeTable = null;
bool sbHuffman = textRegionFlags.getFlagValue(TextRegionFlags.SB_HUFF) != 0;
i = 0;
if (sbHuffman)
{
int sbHuffFS = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_FS);
if (sbHuffFS == 0)
{
huffmanFSTable = HuffmanDecoder.huffmanTableF;
}
else if (sbHuffFS == 1)
{
huffmanFSTable = HuffmanDecoder.huffmanTableG;
}
else
{
}
int sbHuffDS = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_DS);
if (sbHuffDS == 0)
{
huffmanDSTable = HuffmanDecoder.huffmanTableH;
}
else if (sbHuffDS == 1)
{
huffmanDSTable = HuffmanDecoder.huffmanTableI;
}
else if (sbHuffDS == 2)
{
huffmanDSTable = HuffmanDecoder.huffmanTableJ;
}
else
{
}
int sbHuffDT = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_DT);
if (sbHuffDT == 0)
{
huffmanDTTable = HuffmanDecoder.huffmanTableK;
}
else if (sbHuffDT == 1)
{
huffmanDTTable = HuffmanDecoder.huffmanTableL;
}
else if (sbHuffDT == 2)
{
huffmanDTTable = HuffmanDecoder.huffmanTableM;
}
else
{
}
int sbHuffRDW = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_RDW);
if (sbHuffRDW == 0)
{
huffmanRDWTable = HuffmanDecoder.huffmanTableN;
}
else if (sbHuffRDW == 1)
{
huffmanRDWTable = HuffmanDecoder.huffmanTableO;
}
else
{
}
int sbHuffRDH = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_RDH);
if (sbHuffRDH == 0)
{
huffmanRDHTable = HuffmanDecoder.huffmanTableN;
}
else if (sbHuffRDH == 1)
{
huffmanRDHTable = HuffmanDecoder.huffmanTableO;
}
else
{
}
int sbHuffRDX = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_RDX);
if (sbHuffRDX == 0)
{
huffmanRDXTable = HuffmanDecoder.huffmanTableN;
}
else if (sbHuffRDX == 1)
{
huffmanRDXTable = HuffmanDecoder.huffmanTableO;
}
else
{
}
int sbHuffRDY = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_RDY);
if (sbHuffRDY == 0)
{
huffmanRDYTable = HuffmanDecoder.huffmanTableN;
}
else if (sbHuffRDY == 1)
{
huffmanRDYTable = HuffmanDecoder.huffmanTableO;
}
else
{
}
int sbHuffRSize = textRegionHuffmanFlags.getFlagValue(TextRegionHuffmanFlags.SB_HUFF_RSIZE);
if (sbHuffRSize == 0)
{
huffmanRSizeTable = HuffmanDecoder.huffmanTableA;
}
else
{
}
}
long[][] runLengthTable = new long[36][];
long[][] symbolCodeTable = new long[noOfSymbols + 1][];
if (sbHuffman)
{
decoder.consumeRemainingBits();
for (i = 0; i < 32; i++)
{
runLengthTable[i] = new long[] { i, decoder.readBits(4), 0, 0 };
}
runLengthTable[32] = new long[] { 0x103, decoder.readBits(4), 2, 0 };
runLengthTable[33] = new long[] { 0x203, decoder.readBits(4), 3, 0 };
runLengthTable[34] = new long[] { 0x20b, decoder.readBits(4), 7, 0 };
runLengthTable[35] = new long[] { 0, 0, HuffmanDecoder.jbig2HuffmanEOT };
runLengthTable = HuffmanDecoder.buildTable(runLengthTable, 35);
for (i = 0; i < noOfSymbols; i++)
{
symbolCodeTable[i] = new long[] { i, 0, 0, 0 };
}
i = 0;
while (i < noOfSymbols)
{
long j = huffmanDecoder.decodeInt(runLengthTable).intResult();
if (j > 0x200)
{
for (j -= 0x200; j != 0 && i < noOfSymbols; j--)
{
symbolCodeTable[i++][1] = 0;
}
}
else if (j > 0x100)
{
for (j -= 0x100; j != 0 && i < noOfSymbols; j--)
{
symbolCodeTable[i][1] = symbolCodeTable[i - 1][1];
i++;
}
}
else
{
symbolCodeTable[i++][1] = j;
}
}
symbolCodeTable[noOfSymbols][1] = 0;
symbolCodeTable[noOfSymbols][2] = HuffmanDecoder.jbig2HuffmanEOT;
symbolCodeTable = HuffmanDecoder.buildTable(symbolCodeTable, (int)noOfSymbols);
decoder.consumeRemainingBits();
}
else
{
symbolCodeTable = null;
arithmeticDecoder.resetIntStats((int)symbolCodeLength);
arithmeticDecoder.start();
}
bool symbolRefine = textRegionFlags.getFlagValue(TextRegionFlags.SB_REFINE) != 0;
long logStrips = textRegionFlags.getFlagValue(TextRegionFlags.LOG_SB_STRIPES);
int defaultPixel = textRegionFlags.getFlagValue(TextRegionFlags.SB_DEF_PIXEL);
int combinationOperator = textRegionFlags.getFlagValue(TextRegionFlags.SB_COMB_OP);
bool transposed = textRegionFlags.getFlagValue(TextRegionFlags.TRANSPOSED) != 0;
int referenceCorner = textRegionFlags.getFlagValue(TextRegionFlags.REF_CORNER);
int sOffset = textRegionFlags.getFlagValue(TextRegionFlags.SB_DS_OFFSET);
int template = textRegionFlags.getFlagValue(TextRegionFlags.SB_R_TEMPLATE);
if (symbolRefine)
{
arithmeticDecoder.resetRefinementStats(template, null);
}
JBIG2Bitmap bitmap = new JBIG2Bitmap(regionBitmapWidth, regionBitmapHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.readTextRegion2(sbHuffman, symbolRefine, noOfSymbolInstances, logStrips, noOfSymbols, symbolCodeTable, symbolCodeLength, symbols, defaultPixel, combinationOperator, transposed, referenceCorner, sOffset, huffmanFSTable, huffmanDSTable, huffmanDTTable, huffmanRDWTable, huffmanRDHTable, huffmanRDXTable, huffmanRDYTable, huffmanRSizeTable, template, symbolRegionAdaptiveTemplateX, symbolRegionAdaptiveTemplateY, decoder);
if (inlineImage)
{
PageInformationSegment pageSegment = decoder.findPageSegement(segmentHeader.getPageAssociation());
JBIG2Bitmap pageBitmap = pageSegment.getPageBitmap();
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine(pageBitmap + " " + bitmap);
}
int externalCombinationOperator = regionFlags.getFlagValue(RegionFlags.EXTERNAL_COMBINATION_OPERATOR);
pageBitmap.combine(bitmap, regionBitmapXLocation, regionBitmapYLocation, externalCombinationOperator);
}
else
{
bitmap.setBitmapNumber(getSegmentHeader().getSegmentNumber());
decoder.appendBitmap(bitmap);
}
decoder.consumeRemainingBits();
}
public override void ReadSegment()
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("==== Reading Page Information Dictionary ====");
}
short[] buff = new short[4];
decoder.Readbyte(buff);
pageBitmapWidth = BinaryOperation.GetInt32(buff);
buff = new short[4];
decoder.Readbyte(buff);
pageBitmapHeight = BinaryOperation.GetInt32(buff);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Bitmap size = " + pageBitmapWidth + 'x' + pageBitmapHeight);
}
buff = new short[4];
decoder.Readbyte(buff);
xResolution = BinaryOperation.GetInt32(buff);
buff = new short[4];
decoder.Readbyte(buff);
yResolution = BinaryOperation.GetInt32(buff);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Resolution = " + xResolution + 'x' + yResolution);
}
/** extract page information flags */
short pageInformationFlagsField = decoder.Readbyte();
pageInformationFlags.SetFlags(pageInformationFlagsField);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("symbolDictionaryFlags = " + pageInformationFlagsField);
}
buff = new short[2];
decoder.Readbyte(buff);
pageStriping = BinaryOperation.GetInt16(buff);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Page Striping = " + pageStriping);
}
int defPix = pageInformationFlags.GetFlagValue(PageInformationFlags.DEFAULT_PIXEL_VALUE);
int height;
if (pageBitmapHeight == -1)
{
height = pageStriping & 0x7fff;
}
else
{
height = pageBitmapHeight;
}
pageBitmap = new JBIG2Bitmap(pageBitmapWidth, height, arithmeticDecoder, huffmanDecoder, mmrDecoder);
pageBitmap.Clear(defPix);
}
public void ReadSegment()
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("==== Reading Generic Refinement Region ====");
}
base.ReadSegment();
/** read text region segment flags */
ReadGenericRegionFlags();
short[] genericRegionAdaptiveTemplateX = new short[2];
short[] genericRegionAdaptiveTemplateY = new short[2];
int template = refinementRegionFlags.GetFlagValue(RefinementRegionFlags.GR_TEMPLATE);
if (template == 0)
{
genericRegionAdaptiveTemplateX[0] = ReadATValue();
genericRegionAdaptiveTemplateY[0] = ReadATValue();
genericRegionAdaptiveTemplateX[1] = ReadATValue();
genericRegionAdaptiveTemplateY[1] = ReadATValue();
}
if (noOfReferedToSegments == 0 || inlineImage)
{
PageInformationSegment pageSegment = decoder.FindPageSegement(segmentHeader.GetPageAssociation());
JBIG2Bitmap pageBitmap = pageSegment.GetPageBitmap();
if (pageSegment.GetPageBitmapHeight() == -1 && regionBitmapYLocation + regionBitmapHeight > pageBitmap.GetHeight())
{
pageBitmap.Expand(regionBitmapYLocation + regionBitmapHeight, pageSegment.GetPageInformationFlags().GetFlagValue(PageInformationFlags.DEFAULT_PIXEL_VALUE));
}
}
if (noOfReferedToSegments > 1)
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Bad reference in JBIG2 generic refinement Segment");
}
return;
}
JBIG2Bitmap referedToBitmap;
if (noOfReferedToSegments == 1)
{
referedToBitmap = decoder.FindBitmap(referedToSegments[0]);
}
else
{
PageInformationSegment pageSegment = decoder.FindPageSegement(segmentHeader.GetPageAssociation());
JBIG2Bitmap pageBitmap = pageSegment.GetPageBitmap();
referedToBitmap = pageBitmap.GetSlice(regionBitmapXLocation, regionBitmapYLocation, regionBitmapWidth, regionBitmapHeight);
}
arithmeticDecoder.ResetRefinementStats(template, null);
arithmeticDecoder.Start();
bool typicalPredictionGenericRefinementOn = refinementRegionFlags.GetFlagValue(RefinementRegionFlags.TPGDON) != 0;
JBIG2Bitmap bitmap = new JBIG2Bitmap(regionBitmapWidth, regionBitmapHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.ReadGenericRefinementRegion(template, typicalPredictionGenericRefinementOn, referedToBitmap, 0, 0, genericRegionAdaptiveTemplateX, genericRegionAdaptiveTemplateY);
if (inlineImage)
{
PageInformationSegment pageSegment = decoder.FindPageSegement(segmentHeader.GetPageAssociation());
JBIG2Bitmap pageBitmap = pageSegment.GetPageBitmap();
int extCombOp = regionFlags.GetFlagValue(RegionFlags.EXTERNAL_COMBINATION_OPERATOR);
pageBitmap.Combine(bitmap, regionBitmapXLocation, regionBitmapYLocation, extCombOp);
}
else
{
bitmap.SetBitmapNumber(GetSegmentHeader().GetSegmentNumber());
decoder.AppendBitmap(bitmap);
}
}
public override void ReadSegment()
{
base.ReadSegment();
/** read text region Segment flags */
ReadHalftoneRegionFlags();
short[] buf = new short[4];
decoder.Readbyte(buf);
int gridWidth = BinaryOperation.GetInt32(buf);
buf = new short[4];
decoder.Readbyte(buf);
int gridHeight = BinaryOperation.GetInt32(buf);
buf = new short[4];
decoder.Readbyte(buf);
int gridX = BinaryOperation.GetInt32(buf);
buf = new short[4];
decoder.Readbyte(buf);
int gridY = BinaryOperation.GetInt32(buf);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("grid pos and size = " + gridX + ',' + gridY + ' ' + gridWidth + ',' + gridHeight);
}
buf = new short[2];
decoder.Readbyte(buf);
int stepX = BinaryOperation.GetInt16(buf);
buf = new short[2];
decoder.Readbyte(buf);
int stepY = BinaryOperation.GetInt16(buf);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("step size = " + stepX + ',' + stepY);
}
int[] referedToSegments = segmentHeader.GetReferredToSegments();
if (referedToSegments.Length != 1)
{
Console.WriteLine("Error in halftone Segment. refSegs should == 1");
}
Segment segment = decoder.FindSegment(referedToSegments[0]);
if (segment.GetSegmentHeader().GetSegmentType() != Segment.PATTERN_DICTIONARY)
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Error in halftone Segment. bad symbol dictionary reference");
}
}
PatternDictionarySegment patternDictionarySegment = (PatternDictionarySegment)segment;
int bitsPerValue = 0, i = 1;
while (i < patternDictionarySegment.GetSize())
{
bitsPerValue++;
i <<= 1;
}
JBIG2Bitmap bitmap = patternDictionarySegment.GetBitmaps()[0];
long patternWidth = bitmap.GetWidth();
long patternHeight = bitmap.GetHeight();
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("pattern size = " + patternWidth + ',' + patternHeight);
}
bool useMMR = halftoneRegionFlags.GetFlagValue(HalftoneRegionFlags.H_MMR) != 0;
int template = halftoneRegionFlags.GetFlagValue(HalftoneRegionFlags.H_TEMPLATE);
if (!useMMR)
{
arithmeticDecoder.ResetGenericStats(template, null);
arithmeticDecoder.Start();
}
int halftoneDefaultPixel = halftoneRegionFlags.GetFlagValue(HalftoneRegionFlags.H_DEF_PIXEL);
bitmap = new JBIG2Bitmap(regionBitmapWidth, regionBitmapHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.Clear(halftoneDefaultPixel);
bool enableSkip = halftoneRegionFlags.GetFlagValue(HalftoneRegionFlags.H_ENABLE_SKIP) != 0;
JBIG2Bitmap skipBitmap = null;
if (enableSkip)
{
skipBitmap = new JBIG2Bitmap(gridWidth, gridHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
skipBitmap.Clear(0);
for (int y = 0; y < gridHeight; y++)
{
for (int x = 0; x < gridWidth; x++)
{
int xx = gridX + y * stepY + x * stepX;
int yy = gridY + y * stepX - x * stepY;
if (((xx + patternWidth) >> 8) <= 0 || (xx >> 8) >= regionBitmapWidth || ((yy + patternHeight) >> 8) <= 0 || (yy >> 8) >= regionBitmapHeight)
{
skipBitmap.SetPixel(y, x, 1);
}
}
}
}
int[] grayScaleImage = new int[gridWidth * gridHeight];
short[] genericBAdaptiveTemplateX = new short[4], genericBAdaptiveTemplateY = new short[4];
genericBAdaptiveTemplateX[0] = (short)(template <= 1 ? 3 : 2);
genericBAdaptiveTemplateY[0] = -1;
genericBAdaptiveTemplateX[1] = -3;
genericBAdaptiveTemplateY[1] = -1;
genericBAdaptiveTemplateX[2] = 2;
genericBAdaptiveTemplateY[2] = -2;
genericBAdaptiveTemplateX[3] = -2;
genericBAdaptiveTemplateY[3] = -2;
JBIG2Bitmap grayBitmap;
for (int j = bitsPerValue - 1; j >= 0; --j)
{
grayBitmap = new JBIG2Bitmap(gridWidth, gridHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
grayBitmap.ReadBitmap(useMMR, template, false, enableSkip, skipBitmap, genericBAdaptiveTemplateX, genericBAdaptiveTemplateY, -1);
i = 0;
for (int row = 0; row < gridHeight; row++)
{
for (int col = 0; col < gridWidth; col++)
{
int bit = grayBitmap.GetPixel(col, row) ^ grayScaleImage[i] & 1;
grayScaleImage[i] = (grayScaleImage[i] << 1) | bit;
i++;
}
}
}
int combinationOperator = halftoneRegionFlags.GetFlagValue(HalftoneRegionFlags.H_COMB_OP);
i = 0;
for (int col = 0; col < gridHeight; col++)
{
int xx = gridX + col * stepY;
int yy = gridY + col * stepX;
for (int row = 0; row < gridWidth; row++)
{
if (!(enableSkip && skipBitmap.GetPixel(col, row) == 1))
{
JBIG2Bitmap patternBitmap = patternDictionarySegment.GetBitmaps()[grayScaleImage[i]];
bitmap.Combine(patternBitmap, xx >> 8, yy >> 8, combinationOperator);
}
xx += stepX;
yy -= stepY;
i++;
}
}
if (inlineImage)
{
PageInformationSegment pageSegment = decoder.FindPageSegement(segmentHeader.GetPageAssociation());
JBIG2Bitmap pageBitmap = pageSegment.GetPageBitmap();
int externalCombinationOperator = regionFlags.GetFlagValue(RegionFlags.EXTERNAL_COMBINATION_OPERATOR);
pageBitmap.Combine(bitmap, regionBitmapXLocation, regionBitmapYLocation, externalCombinationOperator);
}
else
{
bitmap.SetBitmapNumber(GetSegmentHeader().GetSegmentNumber());
decoder.AppendBitmap(bitmap);
}
}
public override void ReadSegment()
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("==== Reading Immediate Generic Region ====");
}
base.ReadSegment();
/** read text region Segment flags */
ReadGenericRegionFlags();
bool useMMR = genericRegionFlags.GetFlagValue(GenericRegionFlags.MMR) != 0;
int template = genericRegionFlags.GetFlagValue(GenericRegionFlags.GB_TEMPLATE);
short[] genericBAdaptiveTemplateX = new short[4];
short[] genericBAdaptiveTemplateY = new short[4];
if (!useMMR)
{
if (template == 0)
{
genericBAdaptiveTemplateX[0] = ReadATValue();
genericBAdaptiveTemplateY[0] = ReadATValue();
genericBAdaptiveTemplateX[1] = ReadATValue();
genericBAdaptiveTemplateY[1] = ReadATValue();
genericBAdaptiveTemplateX[2] = ReadATValue();
genericBAdaptiveTemplateY[2] = ReadATValue();
genericBAdaptiveTemplateX[3] = ReadATValue();
genericBAdaptiveTemplateY[3] = ReadATValue();
}
else
{
genericBAdaptiveTemplateX[0] = ReadATValue();
genericBAdaptiveTemplateY[0] = ReadATValue();
}
arithmeticDecoder.ResetGenericStats(template, null);
arithmeticDecoder.Start();
}
bool typicalPredictionGenericDecodingOn = genericRegionFlags.GetFlagValue(GenericRegionFlags.TPGDON) != 0;
int length = segmentHeader.GetSegmentDataLength();
if (length == -1)
{
/**
* length of data is unknown, so it needs to be determined through examination of the data.
* See 7.2.7 - Segment data length of the JBIG2 specification.
*/
unknownLength = true;
short match1;
short match2;
if (useMMR)
{
// look for 0x00 0x00 (0, 0)
match1 = 0;
match2 = 0;
}
else
{
// look for 0xFF 0xAC (255, 172)
match1 = 255;
match2 = 172;
}
int bytesRead = 0;
while (true)
{
short bite1 = decoder.Readbyte();
bytesRead++;
if (bite1 == match1)
{
short bite2 = decoder.Readbyte();
bytesRead++;
if (bite2 == match2)
{
length = bytesRead - 2;
break;
}
}
}
decoder.MovePointer(-bytesRead);
}
JBIG2Bitmap bitmap = new JBIG2Bitmap(regionBitmapWidth, regionBitmapHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.Clear(0);
bitmap.ReadBitmap(useMMR, template, typicalPredictionGenericDecodingOn, false, null, genericBAdaptiveTemplateX, genericBAdaptiveTemplateY, useMMR ? 0 : length - 18);
if (inlineImage)
{
PageInformationSegment pageSegment = decoder.FindPageSegement(segmentHeader.GetPageAssociation());
JBIG2Bitmap pageBitmap = pageSegment.GetPageBitmap();
int extCombOp = regionFlags.GetFlagValue(RegionFlags.EXTERNAL_COMBINATION_OPERATOR);
if (pageSegment.GetPageBitmapHeight() == -1 && regionBitmapYLocation + regionBitmapHeight > pageBitmap.GetHeight())
{
pageBitmap.Expand(regionBitmapYLocation + regionBitmapHeight,
pageSegment.GetPageInformationFlags().GetFlagValue(PageInformationFlags.DEFAULT_PIXEL_VALUE));
}
pageBitmap.Combine(bitmap, regionBitmapXLocation, regionBitmapYLocation, extCombOp);
}
else
{
bitmap.SetBitmapNumber(GetSegmentHeader().GetSegmentNumber());
decoder.AppendBitmap(bitmap);
}
if (unknownLength)
{
decoder.MovePointer(4);
}
}
