rosapps/smartpdf/poppler/poppler/FlateStream.h

   1 //========================================================================
   2 //
   3 // FlateStream.h
   4 //
   5 // Copyright (C) 2005, Jeff Muizelaar
   6 //
   7 //========================================================================
   8
   9 #ifndef FLATESTREAM_H
  10 #define FLATESTREAM_H
  11 #include <config.h>
  12
  13 #ifdef USE_GCC_PRAGMAS
  14 #pragma interface
  15 #endif
  16
  17
  18 #ifdef USE_GCC_PRAGMAS
  19 #pragma implementation
  20 #endif
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <stddef.h>
  25 #ifndef WIN32
  26 #include <unistd.h>
  27 #endif
  28 #include <string.h>
  29 #include <ctype.h>
  30 #include "goo/gmem.h"
  31 #include "goo/gfile.h"
  32 #include "poppler-config.h"
  33 #include "Error.h"
  34 #include "Object.h"
  35 #include "Decrypt.h"
  36 #include "Stream.h"
  37
  38 extern "C" {
  39 #include <zlib.h>
  40 }
  41
  42 class FlateStream: public FilterStream {
  43 public:
  44
  45   FlateStream(Stream *strA, int predictor, int columns, int colors, int bits);
  46   virtual ~FlateStream();
  47   virtual StreamKind getKind() { return strFlate; }
  48   virtual void reset();
  49   virtual int getChar();
  50   virtual int lookChar();
  51   virtual GooString *getPSFilter(int psLevel, char *indent);
  52   virtual GBool isBinary(GBool last = gTrue);
  53
  54   int getRawChar() {
  55     if (fill_buffer())
  56       return EOF;
  57
  58     return out_buf[out_pos++];
  59   }
  60
  61 private:
  62   int fill_buffer(void);
  63   z_stream d_stream;
  64   StreamPredictor *pred;
  65   int status;
  66   /* in_buf currently needs to be 1 or we over read from EmbedStreams */
  67   unsigned char in_buf[1];
  68   unsigned char out_buf[4096];
  69   int out_pos;
  70   int out_buf_len;
  71 };
  72
  73 #endif