source/libs/poppler/poppler-src/poppler/JBIG2Stream.h

   1 //========================================================================
   2 //
   3 // JBIG2Stream.h
   4 //
   5 // Copyright 2002-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 //========================================================================
  10 //
  11 // Modified under the Poppler project - http://poppler.freedesktop.org
  12 //
  13 // All changes made under the Poppler project to this file are licensed
  14 // under GPL version 2 or later
  15 //
  16 // Copyright (C) 2009 David Benjamin <davidben@mit.edu>
  17 // Copyright (C) 2013 Adrian Johnson <ajohnson@redneon.com>
  18 // Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
  19 //
  20 // To see a description of the changes please see the Changelog file that
  21 // came with your tarball or type make ChangeLog if you are building from git
  22 //
  23 //========================================================================
  24
  25 #ifndef JBIG2STREAM_H
  26 #define JBIG2STREAM_H
  27
  28 #ifdef USE_GCC_PRAGMAS
  29 #pragma interface
  30 #endif
  31
  32 #include "goo/gtypes.h"
  33 #include "Object.h"
  34 #include "Stream.h"
  35
  36 class GooList;
  37 class JBIG2Segment;
  38 class JBIG2Bitmap;
  39 class JArithmeticDecoder;
  40 class JArithmeticDecoderStats;
  41 class JBIG2HuffmanDecoder;
  42 struct JBIG2HuffmanTable;
  43 class JBIG2MMRDecoder;
  44
  45 //------------------------------------------------------------------------
  46
  47 class JBIG2Stream: public FilterStream {
  48 public:
  49
  50   JBIG2Stream(Stream *strA, Object *globalsStreamA, Object *globalsStreamRefA);
  51   virtual ~JBIG2Stream();
  52   virtual StreamKind getKind() { return strJBIG2; }
  53   virtual void reset();
  54   virtual void close();
  55   virtual Goffset getPos();
  56   virtual int getChar();
  57   virtual int lookChar();
  58   virtual GooString *getPSFilter(int psLevel, const char *indent);
  59   virtual GBool isBinary(GBool last = gTrue);
  60   virtual Object *getGlobalsStream() { return &globalsStream; }
  61   virtual Ref getGlobalsStreamRef() { return globalsStreamRef; }
  62
  63 private:
  64   virtual GBool hasGetChars() { return true; }
  65   virtual int getChars(int nChars, Guchar *buffer);
  66
  67   void readSegments();
  68   GBool readSymbolDictSeg(Guint segNum, Guint length,
  69                           Guint *refSegs, Guint nRefSegs);
  70   void readTextRegionSeg(Guint segNum, GBool imm,
  71                          GBool lossless, Guint length,
  72                          Guint *refSegs, Guint nRefSegs);
  73   JBIG2Bitmap *readTextRegion(GBool huff, GBool refine,
  74                               int w, int h,
  75                               Guint numInstances,
  76                               Guint logStrips,
  77                               int numSyms,
  78                               JBIG2HuffmanTable *symCodeTab,
  79                               Guint symCodeLen,
  80                               JBIG2Bitmap **syms,
  81                               Guint defPixel, Guint combOp,
  82                               Guint transposed, Guint refCorner,
  83                               int sOffset,
  84                               JBIG2HuffmanTable *huffFSTable,
  85                               JBIG2HuffmanTable *huffDSTable,
  86                               JBIG2HuffmanTable *huffDTTable,
  87                               JBIG2HuffmanTable *huffRDWTable,
  88                               JBIG2HuffmanTable *huffRDHTable,
  89                               JBIG2HuffmanTable *huffRDXTable,
  90                               JBIG2HuffmanTable *huffRDYTable,
  91                               JBIG2HuffmanTable *huffRSizeTable,
  92                               Guint templ,
  93                               int *atx, int *aty);
  94   void readPatternDictSeg(Guint segNum, Guint length);
  95   void readHalftoneRegionSeg(Guint segNum, GBool imm,
  96                              GBool lossless, Guint length,
  97                              Guint *refSegs, Guint nRefSegs);
  98   void readGenericRegionSeg(Guint segNum, GBool imm,
  99                             GBool lossless, Guint length);
 100   void mmrAddPixels(int a1, int blackPixels,
 101                     int *codingLine, int *a0i, int w);
 102   void mmrAddPixelsNeg(int a1, int blackPixels,
 103                        int *codingLine, int *a0i, int w);
 104   JBIG2Bitmap *readGenericBitmap(GBool mmr, int w, int h,
 105                                  int templ, GBool tpgdOn,
 106                                  GBool useSkip, JBIG2Bitmap *skip,
 107                                  int *atx, int *aty,
 108                                  int mmrDataLength);
 109   void readGenericRefinementRegionSeg(Guint segNum, GBool imm,
 110                                       GBool lossless, Guint length,
 111                                       Guint *refSegs,
 112                                       Guint nRefSegs);
 113   JBIG2Bitmap *readGenericRefinementRegion(int w, int h,
 114                                            int templ, GBool tpgrOn,
 115                                            JBIG2Bitmap *refBitmap,
 116                                            int refDX, int refDY,
 117                                            int *atx, int *aty);
 118   void readPageInfoSeg(Guint length);
 119   void readEndOfStripeSeg(Guint length);
 120   void readProfilesSeg(Guint length);
 121   void readCodeTableSeg(Guint segNum, Guint length);
 122   void readExtensionSeg(Guint length);
 123   JBIG2Segment *findSegment(Guint segNum);
 124   void discardSegment(Guint segNum);
 125   void resetGenericStats(Guint templ,
 126                          JArithmeticDecoderStats *prevStats);
 127   void resetRefinementStats(Guint templ,
 128                             JArithmeticDecoderStats *prevStats);
 129   void resetIntStats(int symCodeLen);
 130   GBool readUByte(Guint *x);
 131   GBool readByte(int *x);
 132   GBool readUWord(Guint *x);
 133   GBool readULong(Guint *x);
 134   GBool readLong(int *x);
 135
 136   Object globalsStream;
 137   Ref globalsStreamRef;
 138   Guint pageW, pageH, curPageH;
 139   Guint pageDefPixel;
 140   JBIG2Bitmap *pageBitmap;
 141   Guint defCombOp;
 142   GooList *segments;            // [JBIG2Segment]
 143   GooList *globalSegments;      // [JBIG2Segment]
 144   Stream *curStr;
 145   Guchar *dataPtr;
 146   Guchar *dataEnd;
 147
 148   JArithmeticDecoder *arithDecoder;
 149   JArithmeticDecoderStats *genericRegionStats;
 150   JArithmeticDecoderStats *refinementRegionStats;
 151   JArithmeticDecoderStats *iadhStats;
 152   JArithmeticDecoderStats *iadwStats;
 153   JArithmeticDecoderStats *iaexStats;
 154   JArithmeticDecoderStats *iaaiStats;
 155   JArithmeticDecoderStats *iadtStats;
 156   JArithmeticDecoderStats *iaitStats;
 157   JArithmeticDecoderStats *iafsStats;
 158   JArithmeticDecoderStats *iadsStats;
 159   JArithmeticDecoderStats *iardxStats;
 160   JArithmeticDecoderStats *iardyStats;
 161   JArithmeticDecoderStats *iardwStats;
 162   JArithmeticDecoderStats *iardhStats;
 163   JArithmeticDecoderStats *iariStats;
 164   JArithmeticDecoderStats *iaidStats;
 165   JBIG2HuffmanDecoder *huffDecoder;
 166   JBIG2MMRDecoder *mmrDecoder;
 167 };
 168
 169 #endif