reactos/dll/3rdparty/freetype/src/psaux/t1cmap.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  t1cmap.c                                                               */
   4 /*                                                                         */
   5 /*    Type 1 character map support (body).                                 */
   6 /*                                                                         */
   7 /*  Copyright 2002, 2003, 2006 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_UInt )
  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
 141
 142   FT_CALLBACK_DEF( FT_Error )
 143   t1_cmap_expert_init( T1_CMapStd  cmap )
 144   {
 145     t1_cmap_std_init( cmap, 1 );
 146     return 0;
 147   }
 148
 149   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 150   t1_cmap_expert_class_rec =
 151   {
 152     sizeof ( T1_CMapStdRec ),
 153
 154     (FT_CMap_InitFunc)     t1_cmap_expert_init,
 155     (FT_CMap_DoneFunc)     t1_cmap_std_done,
 156     (FT_CMap_CharIndexFunc)t1_cmap_std_char_index,
 157     (FT_CMap_CharNextFunc) t1_cmap_std_char_next
 158   };
 159
 160
 161   /*************************************************************************/
 162   /*************************************************************************/
 163   /*****                                                               *****/
 164   /*****                    TYPE1 CUSTOM ENCODING CMAP                 *****/
 165   /*****                                                               *****/
 166   /*************************************************************************/
 167   /*************************************************************************/
 168
 169
 170   FT_CALLBACK_DEF( FT_Error )
 171   t1_cmap_custom_init( T1_CMapCustom  cmap )
 172   {
 173     T1_Face      face     = (T1_Face)FT_CMAP_FACE( cmap );
 174     T1_Encoding  encoding = &face->type1.encoding;
 175
 176
 177     cmap->first   = encoding->code_first;
 178     cmap->count   = (FT_UInt)( encoding->code_last - cmap->first + 1 );
 179     cmap->indices = encoding->char_index;
 180
 181     FT_ASSERT( cmap->indices != NULL );
 182     FT_ASSERT( encoding->code_first <= encoding->code_last );
 183
 184     return 0;
 185   }
 186
 187
 188   FT_CALLBACK_DEF( void )
 189   t1_cmap_custom_done( T1_CMapCustom  cmap )
 190   {
 191     cmap->indices = NULL;
 192     cmap->first   = 0;
 193     cmap->count   = 0;
 194   }
 195
 196
 197   FT_CALLBACK_DEF( FT_UInt )
 198   t1_cmap_custom_char_index( T1_CMapCustom  cmap,
 199                              FT_UInt32      char_code )
 200   {
 201     FT_UInt    result = 0;
 202
 203
 204     if ( ( char_code >= cmap->first )                  &&
 205          ( char_code < ( cmap->first + cmap->count ) ) )
 206       result = cmap->indices[char_code];
 207
 208     return result;
 209   }
 210
 211
 212   FT_CALLBACK_DEF( FT_UInt )
 213   t1_cmap_custom_char_next( T1_CMapCustom  cmap,
 214                             FT_UInt32     *pchar_code )
 215   {
 216     FT_UInt    result = 0;
 217     FT_UInt32  char_code = *pchar_code;
 218
 219
 220     ++char_code;
 221
 222     if ( char_code < cmap->first )
 223       char_code = cmap->first;
 224
 225     for ( ; char_code < ( cmap->first + cmap->count ); char_code++ )
 226     {
 227       result = cmap->indices[char_code];
 228       if ( result != 0 )
 229         goto Exit;
 230     }
 231
 232     char_code = 0;
 233
 234   Exit:
 235     *pchar_code = char_code;
 236     return result;
 237   }
 238
 239
 240   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 241   t1_cmap_custom_class_rec =
 242   {
 243     sizeof ( T1_CMapCustomRec ),
 244
 245     (FT_CMap_InitFunc)     t1_cmap_custom_init,
 246     (FT_CMap_DoneFunc)     t1_cmap_custom_done,
 247     (FT_CMap_CharIndexFunc)t1_cmap_custom_char_index,
 248     (FT_CMap_CharNextFunc) t1_cmap_custom_char_next
 249   };
 250
 251
 252   /*************************************************************************/
 253   /*************************************************************************/
 254   /*****                                                               *****/
 255   /*****            TYPE1 SYNTHETIC UNICODE ENCODING CMAP              *****/
 256   /*****                                                               *****/
 257   /*************************************************************************/
 258   /*************************************************************************/
 259
 260   FT_CALLBACK_DEF( const char * )
 261   t1_get_glyph_name( T1_Face  face,
 262                      FT_UInt  idx )
 263   {
 264     return face->type1.glyph_names[idx];
 265   }
 266
 267
 268   FT_CALLBACK_DEF( FT_Error )
 269   t1_cmap_unicode_init( PS_Unicodes  unicodes )
 270   {
 271     T1_Face             face    = (T1_Face)FT_CMAP_FACE( unicodes );
 272     FT_Memory           memory  = FT_FACE_MEMORY( face );
 273     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
 274
 275
 276     return psnames->unicodes_init( memory,
 277                                    unicodes,
 278                                    face->type1.num_glyphs,
 279                                    (PS_GetGlyphNameFunc)&t1_get_glyph_name,
 280                                    (PS_FreeGlyphNameFunc)NULL,
 281                                    (FT_Pointer)face );
 282   }
 283
 284
 285   FT_CALLBACK_DEF( void )
 286   t1_cmap_unicode_done( PS_Unicodes  unicodes )
 287   {
 288     FT_Face    face   = FT_CMAP_FACE( unicodes );
 289     FT_Memory  memory = FT_FACE_MEMORY( face );
 290
 291
 292     FT_FREE( unicodes->maps );
 293     unicodes->num_maps = 0;
 294   }
 295
 296
 297   FT_CALLBACK_DEF( FT_UInt )
 298   t1_cmap_unicode_char_index( PS_Unicodes  unicodes,
 299                               FT_UInt32    char_code )
 300   {
 301     T1_Face             face    = (T1_Face)FT_CMAP_FACE( unicodes );
 302     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
 303
 304
 305     return psnames->unicodes_char_index( unicodes, char_code );
 306   }
 307
 308
 309   FT_CALLBACK_DEF( FT_UInt )
 310   t1_cmap_unicode_char_next( PS_Unicodes  unicodes,
 311                              FT_UInt32   *pchar_code )
 312   {
 313     T1_Face             face    = (T1_Face)FT_CMAP_FACE( unicodes );
 314     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)face->psnames;
 315
 316
 317     return psnames->unicodes_char_next( unicodes, pchar_code );
 318   }
 319
 320
 321   FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
 322   t1_cmap_unicode_class_rec =
 323   {
 324     sizeof ( PS_UnicodesRec ),
 325
 326     (FT_CMap_InitFunc)     t1_cmap_unicode_init,
 327     (FT_CMap_DoneFunc)     t1_cmap_unicode_done,
 328     (FT_CMap_CharIndexFunc)t1_cmap_unicode_char_index,
 329     (FT_CMap_CharNextFunc) t1_cmap_unicode_char_next
 330   };
 331
 332
 333 /* END */