reactos/sdk/lib/3rdparty/freetype/src/cff/cffcmap.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  cffcmap.c                                                              */
   4 /*                                                                         */
   5 /*    CFF character mapping table (cmap) support (body).                   */
   6 /*                                                                         */
   7 /*  Copyright 2002-2016 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 <ft2build.h>
  20 #include FT_INTERNAL_DEBUG_H
  21 #include "cffcmap.h"
  22 #include "cffload.h"
  23
  24 #include "cfferrs.h"
  25
  26
  27   /*************************************************************************/
  28   /*************************************************************************/
  29   /*****                                                               *****/
  30   /*****           CFF STANDARD (AND EXPERT) ENCODING CMAPS            *****/
  31   /*****                                                               *****/
  32   /*************************************************************************/
  33   /*************************************************************************/
  34
  35   FT_CALLBACK_DEF( FT_Error )
  36   cff_cmap_encoding_init( CFF_CMapStd  cmap,
  37                           FT_Pointer   pointer )
  38   {
  39     TT_Face       face     = (TT_Face)FT_CMAP_FACE( cmap );
  40     CFF_Font      cff      = (CFF_Font)face->extra.data;
  41     CFF_Encoding  encoding = &cff->encoding;
  42
  43     FT_UNUSED( pointer );
  44
  45
  46     cmap->gids  = encoding->codes;
  47
  48     return 0;
  49   }
  50
  51
  52   FT_CALLBACK_DEF( void )
  53   cff_cmap_encoding_done( CFF_CMapStd  cmap )
  54   {
  55     cmap->gids  = NULL;
  56   }
  57
  58
  59   FT_CALLBACK_DEF( FT_UInt )
  60   cff_cmap_encoding_char_index( CFF_CMapStd  cmap,
  61                                 FT_UInt32    char_code )
  62   {
  63     FT_UInt  result = 0;
  64
  65
  66     if ( char_code < 256 )
  67       result = cmap->gids[char_code];
  68
  69     return result;
  70   }
  71
  72
  73   FT_CALLBACK_DEF( FT_UInt32 )
  74   cff_cmap_encoding_char_next( CFF_CMapStd   cmap,
  75                                FT_UInt32    *pchar_code )
  76   {
  77     FT_UInt    result    = 0;
  78     FT_UInt32  char_code = *pchar_code;
  79
  80
  81     *pchar_code = 0;
  82
  83     if ( char_code < 255 )
  84     {
  85       FT_UInt  code = (FT_UInt)(char_code + 1);
  86
  87
  88       for (;;)
  89       {
  90         if ( code >= 256 )
  91           break;
  92
  93         result = cmap->gids[code];
  94         if ( result != 0 )
  95         {
  96           *pchar_code = code;
  97           break;
  98         }
  99
 100         code++;
 101       }
 102     }
 103     return result;
 104   }
 105
 106
 107   FT_DEFINE_CMAP_CLASS(
 108     cff_cmap_encoding_class_rec,
 109
 110     sizeof ( CFF_CMapStdRec ),
 111
 112     (FT_CMap_InitFunc)     cff_cmap_encoding_init,        /* init       */
 113     (FT_CMap_DoneFunc)     cff_cmap_encoding_done,        /* done       */
 114     (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index,  /* char_index */
 115     (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next,   /* char_next  */
 116
 117     (FT_CMap_CharVarIndexFunc)    NULL,  /* char_var_index   */
 118     (FT_CMap_CharVarIsDefaultFunc)NULL,  /* char_var_default */
 119     (FT_CMap_VariantListFunc)     NULL,  /* variant_list     */
 120     (FT_CMap_CharVariantListFunc) NULL,  /* charvariant_list */
 121     (FT_CMap_VariantCharListFunc) NULL   /* variantchar_list */
 122   )
 123
 124
 125   /*************************************************************************/
 126   /*************************************************************************/
 127   /*****                                                               *****/
 128   /*****              CFF SYNTHETIC UNICODE ENCODING CMAP              *****/
 129   /*****                                                               *****/
 130   /*************************************************************************/
 131   /*************************************************************************/
 132
 133   FT_CALLBACK_DEF( const char* )
 134   cff_sid_to_glyph_name( TT_Face  face,
 135                          FT_UInt  idx )
 136   {
 137     CFF_Font     cff     = (CFF_Font)face->extra.data;
 138     CFF_Charset  charset = &cff->charset;
 139     FT_UInt      sid     = charset->sids[idx];
 140
 141
 142     return cff_index_get_sid_string( cff, sid );
 143   }
 144
 145
 146   FT_CALLBACK_DEF( FT_Error )
 147   cff_cmap_unicode_init( PS_Unicodes  unicodes,
 148                          FT_Pointer   pointer )
 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     FT_UNUSED( pointer );
 157
 158
 159     /* can't build Unicode map for CID-keyed font */
 160     /* because we don't know glyph names.         */
 161     if ( !charset->sids )
 162       return FT_THROW( No_Unicode_Glyph_Name );
 163
 164     return psnames->unicodes_init( memory,
 165                                    unicodes,
 166                                    cff->num_glyphs,
 167                                    (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
 168                                    (PS_FreeGlyphNameFunc)NULL,
 169                                    (FT_Pointer)face );
 170   }
 171
 172
 173   FT_CALLBACK_DEF( void )
 174   cff_cmap_unicode_done( PS_Unicodes  unicodes )
 175   {
 176     FT_Face    face   = FT_CMAP_FACE( unicodes );
 177     FT_Memory  memory = FT_FACE_MEMORY( face );
 178
 179
 180     FT_FREE( unicodes->maps );
 181     unicodes->num_maps = 0;
 182   }
 183
 184
 185   FT_CALLBACK_DEF( FT_UInt )
 186   cff_cmap_unicode_char_index( PS_Unicodes  unicodes,
 187                                FT_UInt32    char_code )
 188   {
 189     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 190     CFF_Font            cff     = (CFF_Font)face->extra.data;
 191     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 192
 193
 194     return psnames->unicodes_char_index( unicodes, char_code );
 195   }
 196
 197
 198   FT_CALLBACK_DEF( FT_UInt32 )
 199   cff_cmap_unicode_char_next( PS_Unicodes  unicodes,
 200                               FT_UInt32   *pchar_code )
 201   {
 202     TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
 203     CFF_Font            cff     = (CFF_Font)face->extra.data;
 204     FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
 205
 206
 207     return psnames->unicodes_char_next( unicodes, pchar_code );
 208   }
 209
 210
 211   FT_DEFINE_CMAP_CLASS(
 212     cff_cmap_unicode_class_rec,
 213
 214     sizeof ( PS_UnicodesRec ),
 215
 216     (FT_CMap_InitFunc)     cff_cmap_unicode_init,        /* init       */
 217     (FT_CMap_DoneFunc)     cff_cmap_unicode_done,        /* done       */
 218     (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index,  /* char_index */
 219     (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next,   /* char_next  */
 220
 221     (FT_CMap_CharVarIndexFunc)    NULL,  /* char_var_index   */
 222     (FT_CMap_CharVarIsDefaultFunc)NULL,  /* char_var_default */
 223     (FT_CMap_VariantListFunc)     NULL,  /* variant_list     */
 224     (FT_CMap_CharVariantListFunc) NULL,  /* charvariant_list */
 225     (FT_CMap_VariantCharListFunc) NULL   /* variantchar_list */
 226   )
 227
 228
 229 /* END */