thirdparty/freetype-2.3.12/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_UInt32 )
  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_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec,
 103     sizeof ( CFF_CMapStdRec ),
 104
 105     (FT_CMap_InitFunc)     cff_cmap_encoding_init,
 106     (FT_CMap_DoneFunc)     cff_cmap_encoding_done,
 107     (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index,
 108     (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next,
 109
 110     NULL, NULL, NULL, NULL, NULL
 111   )
 112
 113
 114   /*************************************************************************/
 115   /*************************************************************************/
 116   /*****                                                               *****/
 117   /*****              CFF SYNTHETIC UNICODE ENCODING CMAP              *****/
 118   /*****                                                               *****/
 119   /*************************************************************************/
 120   /*************************************************************************/
 121
 122   FT_CALLBACK_DEF( const char* )
 123   cff_sid_to_glyph_name( TT_Face   face,
 124                          FT_UInt   idx )
 125   {
 126     CFF_Font            cff     = (CFF_Font)face->extra.data;
 127     CFF_Charset         charset = &cff->charset;
 128     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 129     FT_UInt             sid     = charset->sids[idx];
 130
 131
 132     return cff_index_get_sid_string( &cff->string_index, sid, psnames );
 133   }
 134
 135
 136   FT_CALLBACK_DEF( void )
 137   cff_sid_free_glyph_name( TT_Face      face,
 138                            const char*  gname )
 139   {
 140     FT_Memory  memory = FT_FACE_MEMORY( face );
 141
 142
 143     FT_FREE( gname );
 144   }
 145
 146
 147   FT_CALLBACK_DEF( FT_Error )
 148   cff_cmap_unicode_init( PS_Unicodes  unicodes )
 149   {
 150     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 151     FT_Memory           memory  = FT_FACE_MEMORY( face );
 152     CFF_Font            cff     = (CFF_Font)face->extra.data;
 153     CFF_Charset         charset = &cff->charset;
 154     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 155
 156
 157     /* can't build Unicode map for CID-keyed font */
 158     if ( !charset->sids )
 159       return CFF_Err_Invalid_Argument;
 160
 161     return psnames->unicodes_init( memory,
 162                                    unicodes,
 163                                    cff->num_glyphs,
 164                                    (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
 165                                    (PS_FreeGlyphNameFunc)&cff_sid_free_glyph_name,
 166                                    (FT_Pointer)face );
 167   }
 168
 169
 170   FT_CALLBACK_DEF( void )
 171   cff_cmap_unicode_done( PS_Unicodes  unicodes )
 172   {
 173     FT_Face    face   = FT_CMAP_FACE( unicodes );
 174     FT_Memory  memory = FT_FACE_MEMORY( face );
 175
 176
 177     FT_FREE( unicodes->maps );
 178     unicodes->num_maps = 0;
 179   }
 180
 181
 182   FT_CALLBACK_DEF( FT_UInt )
 183   cff_cmap_unicode_char_index( PS_Unicodes  unicodes,
 184                                FT_UInt32    char_code )
 185   {
 186     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 187     CFF_Font            cff     = (CFF_Font)face->extra.data;
 188     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 189
 190
 191     return psnames->unicodes_char_index( unicodes, char_code );
 192   }
 193
 194
 195   FT_CALLBACK_DEF( FT_UInt32 )
 196   cff_cmap_unicode_char_next( PS_Unicodes  unicodes,
 197                               FT_UInt32   *pchar_code )
 198   {
 199     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 200     CFF_Font            cff     = (CFF_Font)face->extra.data;
 201     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 202
 203
 204     return psnames->unicodes_char_next( unicodes, pchar_code );
 205   }
 206
 207
 208   FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec,
 209     sizeof ( PS_UnicodesRec ),
 210
 211     (FT_CMap_InitFunc)     cff_cmap_unicode_init,
 212     (FT_CMap_DoneFunc)     cff_cmap_unicode_done,
 213     (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index,
 214     (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next,
 215
 216     NULL, NULL, NULL, NULL, NULL
 217   )
 218
 219 /* END */