modules/freetype2/src/cff/cffcmap.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  cffcmap.c                                                              */
   4 /*                                                                         */
   5 /*    CFF character mapping table (cmap) support (body).                   */
   6 /*                                                                         */
   7 /*  Copyright 2002, 2003, 2004, 2005, 2006, 2007 by                        */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18
  19 #include "cffcmap.h"
  20 #include "cffload.h"
  21
  22 #include "cfferrs.h"
  23
  24
  25   /*************************************************************************/
  26   /*************************************************************************/
  27   /*****                                                               *****/
  28   /*****           CFF STANDARD (AND EXPERT) ENCODING CMAPS            *****/
  29   /*****                                                               *****/
  30   /*************************************************************************/
  31   /*************************************************************************/
  32
  33   FT_CALLBACK_DEF( FT_Error )
  34   cff_cmap_encoding_init( CFF_CMapStd  cmap )
  35   {
  36     TT_Face       face     = (TT_Face)FT_CMAP_FACE( cmap );
  37     CFF_Font      cff      = (CFF_Font)face->extra.data;
  38     CFF_Encoding  encoding = &cff->encoding;
  39
  40
  41     cmap->gids  = encoding->codes;
  42
  43     return 0;
  44   }
  45
  46
  47   FT_CALLBACK_DEF( void )
  48   cff_cmap_encoding_done( CFF_CMapStd  cmap )
  49   {
  50     cmap->gids  = NULL;
  51   }
  52
  53
  54   FT_CALLBACK_DEF( FT_UInt )
  55   cff_cmap_encoding_char_index( CFF_CMapStd  cmap,
  56                                 FT_UInt32    char_code )
  57   {
  58     FT_UInt  result = 0;
  59
  60
  61     if ( char_code < 256 )
  62       result = cmap->gids[char_code];
  63
  64     return result;
  65   }
  66
  67
  68   FT_CALLBACK_DEF( FT_UInt )
  69   cff_cmap_encoding_char_next( CFF_CMapStd   cmap,
  70                                FT_UInt32    *pchar_code )
  71   {
  72     FT_UInt    result    = 0;
  73     FT_UInt32  char_code = *pchar_code;
  74
  75
  76     *pchar_code = 0;
  77
  78     if ( char_code < 255 )
  79     {
  80       FT_UInt  code = (FT_UInt)(char_code + 1);
  81
  82
  83       for (;;)
  84       {
  85         if ( code >= 256 )
  86           break;
  87
  88         result = cmap->gids[code];
  89         if ( result != 0 )
  90         {
  91           *pchar_code = code;
  92           break;
  93         }
  94
  95         code++;
  96       }
  97     }
  98     return result;
  99   }
 100
 101
 102   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 103   cff_cmap_encoding_class_rec =
 104   {
 105     sizeof ( CFF_CMapStdRec ),
 106
 107     (FT_CMap_InitFunc)     cff_cmap_encoding_init,
 108     (FT_CMap_DoneFunc)     cff_cmap_encoding_done,
 109     (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index,
 110     (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next,
 111
 112     NULL, NULL, NULL, NULL, NULL
 113   };
 114
 115
 116   /*************************************************************************/
 117   /*************************************************************************/
 118   /*****                                                               *****/
 119   /*****              CFF SYNTHETIC UNICODE ENCODING CMAP              *****/
 120   /*****                                                               *****/
 121   /*************************************************************************/
 122   /*************************************************************************/
 123
 124   FT_CALLBACK_DEF( const char* )
 125   cff_sid_to_glyph_name( TT_Face   face,
 126                          FT_UInt   idx )
 127   {
 128     CFF_Font            cff     = (CFF_Font)face->extra.data;
 129     CFF_Charset         charset = &cff->charset;
 130     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 131     FT_UInt             sid     = charset->sids[idx];
 132
 133
 134     return cff_index_get_sid_string( &cff->string_index, sid, psnames );
 135   }
 136
 137
 138   FT_CALLBACK_DEF( void )
 139   cff_sid_free_glyph_name( TT_Face      face,
 140                            const char*  gname )
 141   {
 142     FT_Memory  memory = FT_FACE_MEMORY( face );
 143
 144
 145     FT_FREE( gname );
 146   }
 147
 148
 149   FT_CALLBACK_DEF( FT_Error )
 150   cff_cmap_unicode_init( PS_Unicodes  unicodes )
 151   {
 152     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 153     FT_Memory           memory  = FT_FACE_MEMORY( face );
 154     CFF_Font            cff     = (CFF_Font)face->extra.data;
 155     CFF_Charset         charset = &cff->charset;
 156     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 157
 158
 159     /* can't build Unicode map for CID-keyed font */
 160     if ( !charset->sids )
 161       return CFF_Err_Invalid_Argument;
 162
 163     return psnames->unicodes_init( memory,
 164                                    unicodes,
 165                                    cff->num_glyphs,
 166                                    (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
 167                                    (PS_FreeGlyphNameFunc)&cff_sid_free_glyph_name,
 168                                    (FT_Pointer)face );
 169   }
 170
 171
 172   FT_CALLBACK_DEF( void )
 173   cff_cmap_unicode_done( PS_Unicodes  unicodes )
 174   {
 175     FT_Face    face   = FT_CMAP_FACE( unicodes );
 176     FT_Memory  memory = FT_FACE_MEMORY( face );
 177
 178
 179     FT_FREE( unicodes->maps );
 180     unicodes->num_maps = 0;
 181   }
 182
 183
 184   FT_CALLBACK_DEF( FT_UInt )
 185   cff_cmap_unicode_char_index( PS_Unicodes  unicodes,
 186                                FT_UInt32    char_code )
 187   {
 188     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 189     CFF_Font            cff     = (CFF_Font)face->extra.data;
 190     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 191
 192
 193     return psnames->unicodes_char_index( unicodes, char_code );
 194   }
 195
 196
 197   FT_CALLBACK_DEF( FT_UInt )
 198   cff_cmap_unicode_char_next( PS_Unicodes  unicodes,
 199                               FT_UInt32   *pchar_code )
 200   {
 201     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 202     CFF_Font            cff     = (CFF_Font)face->extra.data;
 203     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 204
 205
 206     return psnames->unicodes_char_next( unicodes, pchar_code );
 207   }
 208
 209
 210   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 211   cff_cmap_unicode_class_rec =
 212   {
 213     sizeof ( PS_UnicodesRec ),
 214
 215     (FT_CMap_InitFunc)     cff_cmap_unicode_init,
 216     (FT_CMap_DoneFunc)     cff_cmap_unicode_done,
 217     (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index,
 218     (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next,
 219
 220     NULL, NULL, NULL, NULL, NULL
 221   };
 222
 223
 224 /* END */