pdf2swf/xpdf/FoFiTrueType.h

   1 //========================================================================
   2 //
   3 // FoFiTrueType.h
   4 //
   5 // Copyright 1999-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 #ifndef FOFITRUETYPE_H
  10 #define FOFITRUETYPE_H
  11
  12 #include <aconf.h>
  13
  14 #ifdef USE_GCC_PRAGMAS
  15 #pragma interface
  16 #endif
  17
  18 #include "gtypes.h"
  19 #include "FoFiBase.h"
  20
  21 class GHash;
  22 struct TrueTypeTable;
  23 struct TrueTypeCmap;
  24
  25 //------------------------------------------------------------------------
  26 // FoFiTrueType
  27 //------------------------------------------------------------------------
  28
  29 class FoFiTrueType: public FoFiBase {
  30 public:
  31
  32   // Create a FoFiTrueType object from a memory buffer.
  33   static FoFiTrueType *make(char *fileA, int lenA);
  34
  35   // Create a FoFiTrueType object from a file on disk.
  36   static FoFiTrueType *load(char *fileName);
  37
  38   virtual ~FoFiTrueType();
  39
  40   // Return the number of cmaps defined by this font.
  41   int getNumCmaps();
  42
  43   // Return the platform ID of the <i>th cmap.
  44   int getCmapPlatform(int i);
  45
  46   // Return the encoding ID of the <i>th cmap.
  47   int getCmapEncoding(int i);
  48
  49   // Return the index of the cmap for <platform>, <encoding>.  Returns
  50   // -1 if there is no corresponding cmap.
  51   int findCmap(int platform, int encoding);
  52
  53   // Return the GID corresponding to <c> according to the <i>th cmap.
  54   Gushort mapCodeToGID(int i, int c);
  55
  56   // Returns the GID corresponding to <name> according to the post
  57   // table.  Returns 0 if there is no mapping for <name> or if the
  58   // font does not have a post table.
  59   int mapNameToGID(char *name);
  60
  61   // Returns the least restrictive embedding licensing right (as
  62   // defined by the TrueType spec):
  63   // * 4: OS/2 table is missing or invalid
  64   // * 3: installable embedding
  65   // * 2: editable embedding
  66   // * 1: preview & print embedding
  67   // * 0: restricted license embedding
  68   int getEmbeddingRights();
  69
  70   // Convert to a Type 42 font, suitable for embedding in a PostScript
  71   // file.  <psName> will be used as the PostScript font name (so we
  72   // don't need to depend on the 'name' table in the font).  The
  73   // <encoding> array specifies the mapping from char codes to names.
  74   // If <encoding> is NULL, the encoding is unknown or undefined.  The
  75   // <codeToGID> array specifies the mapping from char codes to GIDs.
  76   void convertToType42(char *psName, char **encoding,
  77                        Gushort *codeToGID,
  78                        FoFiOutputFunc outputFunc, void *outputStream);
  79
  80   // Convert to a Type 2 CIDFont, suitable for embedding in a
  81   // PostScript file.  <psName> will be used as the PostScript font
  82   // name (so we don't need to depend on the 'name' table in the
  83   // font).  The <cidMap> array maps CIDs to GIDs; it has <nCIDs>
  84   // entries.
  85   void convertToCIDType2(char *psName, Gushort *cidMap, int nCIDs,
  86                          FoFiOutputFunc outputFunc, void *outputStream);
  87
  88   // Convert to a Type 0 (but non-CID) composite font, suitable for
  89   // embedding in a PostScript file.  <psName> will be used as the
  90   // PostScript font name (so we don't need to depend on the 'name'
  91   // table in the font).  The <cidMap> array maps CIDs to GIDs; it has
  92   // <nCIDs> entries.
  93   void convertToType0(char *psName, Gushort *cidMap, int nCIDs,
  94                       FoFiOutputFunc outputFunc, void *outputStream);
  95
  96   // Write a clean TTF file, filling in missing tables and correcting
  97   // various other errors.  If the font is complete and correct, it
  98   // will be written unmodified.
  99   void writeTTF(FoFiOutputFunc outputFunc, void *outputStream);
 100
 101 private:
 102
 103   FoFiTrueType(char *fileA, int lenA, GBool freeFileDataA);
 104   void cvtEncoding(char **encoding,
 105                    FoFiOutputFunc outputFunc,
 106                    void *outputStream);
 107   void cvtCharStrings(char **encoding,
 108                       Gushort *codeToGID,
 109                       FoFiOutputFunc outputFunc,
 110                       void *outputStream);
 111   void cvtSfnts(FoFiOutputFunc outputFunc,
 112                 void *outputStream, GString *name);
 113   void dumpString(Guchar *s, int length,
 114                   FoFiOutputFunc outputFunc,
 115                   void *outputStream);
 116   Guint computeTableChecksum(Guchar *data, int length);
 117   void parse();
 118   void readPostTable();
 119   int seekTable(char *tag);
 120
 121   TrueTypeTable *tables;
 122   int nTables;
 123   TrueTypeCmap *cmaps;
 124   int nCmaps;
 125   int nGlyphs;
 126   int locaFmt;
 127   int bbox[4];
 128   GHash *nameToGID;
 129
 130   GBool parsedOk;
 131 };
 132
 133 #endif