thirdparty/freetype-2.3.12/src/psaux/t1cmap.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  t1cmap.c                                                               */
   4 /*                                                                         */
   5 /*    Type 1 character map support (body).                                 */
   6 /*                                                                         */
   7 /*  Copyright 2002, 2003, 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 "t1cmap.h"
  20
  21 #include FT_INTERNAL_DEBUG_H
  22
  23 #include "psauxerr.h"
  24
  25
  26   /*************************************************************************/
  27   /*************************************************************************/
  28   /*****                                                               *****/
  29   /*****          TYPE1 STANDARD (AND EXPERT) ENCODING CMAPS           *****/
  30   /*****                                                               *****/
  31   /*************************************************************************/
  32   /*************************************************************************/
  33
  34   static void
  35   t1_cmap_std_init( T1_CMapStd  cmap,
  36                     FT_Int      is_expert )
  37   {
  38     T1_Face             face    = (T1_Face)FT_CMAP_FACE( cmap );
  39     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
  40
  41
  42     cmap->num_glyphs    = face->type1.num_glyphs;
  43     cmap->glyph_names   = (const char* const*)face->type1.glyph_names;
  44     cmap->sid_to_string = psnames->adobe_std_strings;
  45     cmap->code_to_sid   = is_expert ? psnames->adobe_expert_encoding
  46                                     : psnames->adobe_std_encoding;
  47
  48     FT_ASSERT( cmap->code_to_sid != NULL );
  49   }
  50
  51
  52   FT_CALLBACK_DEF( void )
  53   t1_cmap_std_done( T1_CMapStd  cmap )
  54   {
  55     cmap->num_glyphs    = 0;
  56     cmap->glyph_names   = NULL;
  57     cmap->sid_to_string = NULL;
  58     cmap->code_to_sid   = NULL;
  59   }
  60
  61
  62   FT_CALLBACK_DEF( FT_UInt )
  63   t1_cmap_std_char_index( T1_CMapStd  cmap,
  64                           FT_UInt32   char_code )
  65   {
  66     FT_UInt  result = 0;
  67
  68
  69     if ( char_code < 256 )
  70     {
  71       FT_UInt      code, n;
  72       const char*  glyph_name;
  73
  74
  75       /* convert character code to Adobe SID string */
  76       code       = cmap->code_to_sid[char_code];
  77       glyph_name = cmap->sid_to_string( code );
  78
  79       /* look for the corresponding glyph name */
  80       for ( n = 0; n < cmap->num_glyphs; n++ )
  81       {
  82         const char* gname = cmap->glyph_names[n];
  83
  84
  85         if ( gname && gname[0] == glyph_name[0]  &&
  86              ft_strcmp( gname, glyph_name ) == 0 )
  87         {
  88           result = n;
  89           break;
  90         }
  91       }
  92     }
  93
  94     return result;
  95   }
  96
  97
  98   FT_CALLBACK_DEF( FT_UInt32 )
  99   t1_cmap_std_char_next( T1_CMapStd   cmap,
 100                          FT_UInt32   *pchar_code )
 101   {
 102     FT_UInt    result    = 0;
 103     FT_UInt32  char_code = *pchar_code + 1;
 104
 105
 106     while ( char_code < 256 )
 107     {
 108       result = t1_cmap_std_char_index( cmap, char_code );
 109       if ( result != 0 )
 110         goto Exit;
 111
 112       char_code++;
 113     }
 114     char_code = 0;
 115
 116   Exit:
 117     *pchar_code = char_code;
 118     return result;
 119   }
 120
 121
 122   FT_CALLBACK_DEF( FT_Error )
 123   t1_cmap_standard_init( T1_CMapStd  cmap )
 124   {
 125     t1_cmap_std_init( cmap, 0 );
 126     return 0;
 127   }
 128
 129
 130   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 131   t1_cmap_standard_class_rec =
 132   {
 133     sizeof ( T1_CMapStdRec ),
 134
 135     (FT_CMap_InitFunc)     t1_cmap_standard_init,
 136     (FT_CMap_DoneFunc)     t1_cmap_std_done,
 137     (FT_CMap_CharIndexFunc)t1_cmap_std_char_index,
 138     (FT_CMap_CharNextFunc) t1_cmap_std_char_next,
 139
 140     NULL, NULL, NULL, NULL, NULL
 141   };
 142
 143
 144   FT_CALLBACK_DEF( FT_Error )
 145   t1_cmap_expert_init( T1_CMapStd  cmap )
 146   {
 147     t1_cmap_std_init( cmap, 1 );
 148     return 0;
 149   }
 150
 151   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 152   t1_cmap_expert_class_rec =
 153   {
 154     sizeof ( T1_CMapStdRec ),
 155
 156     (FT_CMap_InitFunc)     t1_cmap_expert_init,
 157     (FT_CMap_DoneFunc)     t1_cmap_std_done,
 158     (FT_CMap_CharIndexFunc)t1_cmap_std_char_index,
 159     (FT_CMap_CharNextFunc) t1_cmap_std_char_next,
 160
 161     NULL, NULL, NULL, NULL, NULL
 162   };
 163
 164
 165   /*************************************************************************/
 166   /*************************************************************************/
 167   /*****                                                               *****/
 168   /*****                    TYPE1 CUSTOM ENCODING CMAP                 *****/
 169   /*****                                                               *****/
 170   /*************************************************************************/
 171   /*************************************************************************/
 172
 173
 174   FT_CALLBACK_DEF( FT_Error )
 175   t1_cmap_custom_init( T1_CMapCustom  cmap )
 176   {
 177     T1_Face      face     = (T1_Face)FT_CMAP_FACE( cmap );
 178     T1_Encoding  encoding = &face->type1.encoding;
 179
 180
 181     cmap->first   = encoding->code_first;
 182     cmap->count   = (FT_UInt)( encoding->code_last - cmap->first );
 183     cmap->indices = encoding->char_index;
 184
 185     FT_ASSERT( cmap->indices != NULL );
 186     FT_ASSERT( encoding->code_first <= encoding->code_last );
 187
 188     return 0;
 189   }
 190
 191
 192   FT_CALLBACK_DEF( void )
 193   t1_cmap_custom_done( T1_CMapCustom  cmap )
 194   {
 195     cmap->indices = NULL;
 196     cmap->first   = 0;
 197     cmap->count   = 0;
 198   }
 199
 200
 201   FT_CALLBACK_DEF( FT_UInt )
 202   t1_cmap_custom_char_index( T1_CMapCustom  cmap,
 203                              FT_UInt32      char_code )
 204   {
 205     FT_UInt    result = 0;
 206
 207
 208     if ( ( char_code >= cmap->first )                  &&
 209          ( char_code < ( cmap->first + cmap->count ) ) )
 210       result = cmap->indices[char_code];
 211
 212     return result;
 213   }
 214
 215
 216   FT_CALLBACK_DEF( FT_UInt32 )
 217   t1_cmap_custom_char_next( T1_CMapCustom  cmap,
 218                             FT_UInt32     *pchar_code )
 219   {
 220     FT_UInt    result = 0;
 221     FT_UInt32  char_code = *pchar_code;
 222
 223
 224     ++char_code;
 225
 226     if ( char_code < cmap->first )
 227       char_code = cmap->first;
 228
 229     for ( ; char_code < ( cmap->first + cmap->count ); char_code++ )
 230     {
 231       result = cmap->indices[char_code];
 232       if ( result != 0 )
 233         goto Exit;
 234     }
 235
 236     char_code = 0;
 237
 238   Exit:
 239     *pchar_code = char_code;
 240     return result;
 241   }
 242
 243
 244   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 245   t1_cmap_custom_class_rec =
 246   {
 247     sizeof ( T1_CMapCustomRec ),
 248
 249     (FT_CMap_InitFunc)     t1_cmap_custom_init,
 250     (FT_CMap_DoneFunc)     t1_cmap_custom_done,
 251     (FT_CMap_CharIndexFunc)t1_cmap_custom_char_index,
 252     (FT_CMap_CharNextFunc) t1_cmap_custom_char_next,
 253
 254     NULL, NULL, NULL, NULL, NULL
 255   };
 256
 257
 258   /*************************************************************************/
 259   /*************************************************************************/
 260   /*****                                                               *****/
 261   /*****            TYPE1 SYNTHETIC UNICODE ENCODING CMAP              *****/
 262   /*****                                                               *****/
 263   /*************************************************************************/
 264   /*************************************************************************/
 265
 266   FT_CALLBACK_DEF( const char * )
 267   t1_get_glyph_name( T1_Face  face,
 268                      FT_UInt  idx )
 269   {
 270     return face->type1.glyph_names[idx];
 271   }
 272
 273
 274   FT_CALLBACK_DEF( FT_Error )
 275   t1_cmap_unicode_init( PS_Unicodes  unicodes )
 276   {
 277     T1_Face             face    = (T1_Face)FT_CMAP_FACE( unicodes );
 278     FT_Memory           memory  = FT_FACE_MEMORY( face );
 279     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
 280
 281
 282     return psnames->unicodes_init( memory,
 283                                    unicodes,
 284                                    face->type1.num_glyphs,
 285                                    (PS_GetGlyphNameFunc)&t1_get_glyph_name,
 286                                    (PS_FreeGlyphNameFunc)NULL,
 287                                    (FT_Pointer)face );
 288   }
 289
 290
 291   FT_CALLBACK_DEF( void )
 292   t1_cmap_unicode_done( PS_Unicodes  unicodes )
 293   {
 294     FT_Face    face   = FT_CMAP_FACE( unicodes );
 295     FT_Memory  memory = FT_FACE_MEMORY( face );
 296
 297
 298     FT_FREE( unicodes->maps );
 299     unicodes->num_maps = 0;
 300   }
 301
 302
 303   FT_CALLBACK_DEF( FT_UInt )
 304   t1_cmap_unicode_char_index( PS_Unicodes  unicodes,
 305                               FT_UInt32    char_code )
 306   {
 307     T1_Face             face    = (T1_Face)FT_CMAP_FACE( unicodes );
 308     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
 309
 310
 311     return psnames->unicodes_char_index( unicodes, char_code );
 312   }
 313
 314
 315   FT_CALLBACK_DEF( FT_UInt32 )
 316   t1_cmap_unicode_char_next( PS_Unicodes  unicodes,
 317                              FT_UInt32   *pchar_code )
 318   {
 319     T1_Face             face    = (T1_Face)FT_CMAP_FACE( unicodes );
 320     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
 321
 322
 323     return psnames->unicodes_char_next( unicodes, pchar_code );
 324   }
 325
 326
 327   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 328   t1_cmap_unicode_class_rec =
 329   {
 330     sizeof ( PS_UnicodesRec ),
 331
 332     (FT_CMap_InitFunc)     t1_cmap_unicode_init,
 333     (FT_CMap_DoneFunc)     t1_cmap_unicode_done,
 334     (FT_CMap_CharIndexFunc)t1_cmap_unicode_char_index,
 335     (FT_CMap_CharNextFunc) t1_cmap_unicode_char_next,
 336
 337     NULL, NULL, NULL, NULL, NULL
 338   };
 339
 340
 341 /* END */