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 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; // 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 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);
}
}