utils/tex2rtf/src/readshg.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        readshg.h
   3 // Purpose:     Petr Smilauer's .SHG (Segmented Hypergraphics file) reading
   4 //              code.
   5 //              Note: .SHG is undocumented (anywhere!) so this is
   6 //              reverse-engineering
   7 //              and guesswork at its best.
   8 // Author:      Petr Smilauer
   9 // Modified by:
  10 // Created:     01/01/99
  11 // RCS-ID:      $Id$
  12 // Copyright:   (c) Petr Smilauer
  13 // Licence:     wxWindows licence
  14 /////////////////////////////////////////////////////////////////////////////
  15
  16 #ifndef readshgh
  17 #define readshgh
  18
  19 #include  <stdio.h>
  20 #include <stdlib.h>
  21
  22 typedef enum { TypePopup = 0xE2, TypeJump = 0xE3, TypeMacro = 0xC8} HotspotType;
  23
  24 #define NOT_VISIBLE  0x04
  25
  26 typedef struct
  27 {
  28   unsigned char   hotspotType;// combines HotspotType /w NOT_VISIBLE if appropriate
  29   unsigned char   flag;       // NOT_VISIBLE or 0 ??
  30   unsigned char   skip;       // 0, always??
  31   unsigned short  left,
  32                   top,
  33                   width,      // left+width/top+height give right/bottom,
  34                   height;     // =>right and bottom edge are not 'included'
  35   unsigned char   magic[4];   // wonderful numbers: for macros, this seems
  36     // (at least first 2 bytes) to represent offset into macro-strings block.
  37 } ShgInfoBlock;   // whole block is just 15 bytes long. How weird!
  38
  39 #define OFF_OFFSET    0x20    // this is offset, where WORD (?) lies
  40 #define OFFSET_DELTA  9       // we must add this to get real offset from file beginning
  41
  42 struct HotSpot
  43 {
  44           HotspotType type;
  45           unsigned int left,
  46                       top,
  47                       right,
  48                       bottom;
  49           char        szHlpTopic_Macro[65];
  50           bool        IsVisible;
  51 };
  52
  53 // Returns the number of hotspots, and the array of hotspots.
  54 // E.g.
  55 // HotSpots *array;
  56 // int n = ParseSHG("thing.shg", &array);
  57
  58 extern int ParseSHG( const char* fileName, HotSpot **hotspots);
  59
  60 // Converts Windows .SHG file to HTML map file
  61 extern bool SHGToMap(char *filename, char *defaultFile);
  62
  63 #endif
  64