pdftops/JBIG2Stream.h

   1 //========================================================================
   2 //
   3 // JBIG2Stream.h
   4 //
   5 // Copyright 2002-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 #ifndef JBIG2STREAM_H
  10 #define JBIG2STREAM_H
  11
  12 #include <config.h>
  13
  14 #ifdef USE_GCC_PRAGMAS
  15 #pragma interface
  16 #endif
  17
  18 #include "gtypes.h"
  19 #include "Object.h"
  20 #include "Stream.h"
  21
  22 class GList;
  23 class JBIG2Segment;
  24 class JBIG2Bitmap;
  25 class JArithmeticDecoder;
  26 class JArithmeticDecoderStats;
  27 class JBIG2HuffmanDecoder;
  28 struct JBIG2HuffmanTable;
  29 class JBIG2MMRDecoder;
  30
  31 //------------------------------------------------------------------------
  32
  33 class JBIG2Stream: public FilterStream {
  34 public:
  35
  36   JBIG2Stream(Stream *strA, Object *globalsStream);
  37   virtual ~JBIG2Stream();
  38   virtual StreamKind getKind() { return strJBIG2; }
  39   virtual void reset();
  40   virtual int getChar();
  41   virtual int lookChar();
  42   virtual GString *getPSFilter(int psLevel, char *indent);
  43   virtual GBool isBinary(GBool last = gTrue);
  44
  45 private:
  46
  47   void readSegments();
  48   GBool readSymbolDictSeg(Guint segNum, Guint length,
  49                           Guint *refSegs, Guint nRefSegs);
  50   void readTextRegionSeg(Guint segNum, GBool imm,
  51                          GBool lossless, Guint length,
  52                          Guint *refSegs, Guint nRefSegs);
  53   JBIG2Bitmap *readTextRegion(GBool huff, GBool refine,
  54                               int w, int h,
  55                               Guint numInstances,
  56                               Guint logStrips,
  57                               int numSyms,
  58                               JBIG2HuffmanTable *symCodeTab,
  59                               Guint symCodeLen,
  60                               JBIG2Bitmap **syms,
  61                               Guint defPixel, Guint combOp,
  62                               Guint transposed, Guint refCorner,
  63                               int sOffset,
  64                               JBIG2HuffmanTable *huffFSTable,
  65                               JBIG2HuffmanTable *huffDSTable,
  66                               JBIG2HuffmanTable *huffDTTable,
  67                               JBIG2HuffmanTable *huffRDWTable,
  68                               JBIG2HuffmanTable *huffRDHTable,
  69                               JBIG2HuffmanTable *huffRDXTable,
  70                               JBIG2HuffmanTable *huffRDYTable,
  71                               JBIG2HuffmanTable *huffRSizeTable,
  72                               Guint templ,
  73                               int *atx, int *aty);
  74   void readPatternDictSeg(Guint segNum, Guint length);
  75   void readHalftoneRegionSeg(Guint segNum, GBool imm,
  76                              GBool lossless, Guint length,
  77                              Guint *refSegs, Guint nRefSegs);
  78   void readGenericRegionSeg(Guint segNum, GBool imm,
  79                             GBool lossless, Guint length);
  80   JBIG2Bitmap *readGenericBitmap(GBool mmr, int w, int h,
  81                                  int templ, GBool tpgdOn,
  82                                  GBool useSkip, JBIG2Bitmap *skip,
  83                                  int *atx, int *aty,
  84                                  int mmrDataLength);
  85   void readGenericRefinementRegionSeg(Guint segNum, GBool imm,
  86                                       GBool lossless, Guint length,
  87                                       Guint *refSegs,
  88                                       Guint nRefSegs);
  89   JBIG2Bitmap *readGenericRefinementRegion(int w, int h,
  90                                            int templ, GBool tpgrOn,
  91                                            JBIG2Bitmap *refBitmap,
  92                                            int refDX, int refDY,
  93                                            int *atx, int *aty);
  94   void readPageInfoSeg(Guint length);
  95   void readEndOfStripeSeg(Guint length);
  96   void readProfilesSeg(Guint length);
  97   void readCodeTableSeg(Guint segNum, Guint length);
  98   void readExtensionSeg(Guint length);
  99   JBIG2Segment *findSegment(Guint segNum);
 100   void discardSegment(Guint segNum);
 101   void resetGenericStats(Guint templ,
 102                          JArithmeticDecoderStats *prevStats);
 103   void resetRefinementStats(Guint templ,
 104                             JArithmeticDecoderStats *prevStats);
 105   void resetIntStats(int symCodeLen);
 106   GBool readUByte(Guint *x);
 107   GBool readByte(int *x);
 108   GBool readUWord(Guint *x);
 109   GBool readULong(Guint *x);
 110   GBool readLong(int *x);
 111
 112   Guint pageW, pageH, curPageH;
 113   Guint pageDefPixel;
 114   JBIG2Bitmap *pageBitmap;
 115   Guint defCombOp;
 116   GList *segments;              // [JBIG2Segment]
 117   GList *globalSegments;        // [JBIG2Segment]
 118   Stream *curStr;
 119   Guchar *dataPtr;
 120   Guchar *dataEnd;
 121
 122   JArithmeticDecoder *arithDecoder;
 123   JArithmeticDecoderStats *genericRegionStats;
 124   JArithmeticDecoderStats *refinementRegionStats;
 125   JArithmeticDecoderStats *iadhStats;
 126   JArithmeticDecoderStats *iadwStats;
 127   JArithmeticDecoderStats *iaexStats;
 128   JArithmeticDecoderStats *iaaiStats;
 129   JArithmeticDecoderStats *iadtStats;
 130   JArithmeticDecoderStats *iaitStats;
 131   JArithmeticDecoderStats *iafsStats;
 132   JArithmeticDecoderStats *iadsStats;
 133   JArithmeticDecoderStats *iardxStats;
 134   JArithmeticDecoderStats *iardyStats;
 135   JArithmeticDecoderStats *iardwStats;
 136   JArithmeticDecoderStats *iardhStats;
 137   JArithmeticDecoderStats *iariStats;
 138   JArithmeticDecoderStats *iaidStats;
 139   JBIG2HuffmanDecoder *huffDecoder;
 140   JBIG2MMRDecoder *mmrDecoder;
 141 };
 142
 143 #endif