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/src/freetype/src/cff/cffcmap.c

https://bitbucket.org/cabalistic/ogredeps/
C | 208 lines | 119 code | 56 blank | 33 comment | 7 complexity | 6b45d0cbd3b4340bd1d0a2c491f07332 MD5 | raw file
  1/***************************************************************************/
  2/*                                                                         */
  3/*  cffcmap.c                                                              */
  4/*                                                                         */
  5/*    CFF character mapping table (cmap) support (body).                   */
  6/*                                                                         */
  7/*  Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2010 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_UInt      sid     = charset->sids[idx];
129
130
131    return cff_index_get_sid_string( cff, sid );
132  }
133
134
135  FT_CALLBACK_DEF( FT_Error )
136  cff_cmap_unicode_init( PS_Unicodes  unicodes )
137  {
138    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
139    FT_Memory           memory  = FT_FACE_MEMORY( face );
140    CFF_Font            cff     = (CFF_Font)face->extra.data;
141    CFF_Charset         charset = &cff->charset;
142    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
143
144
145    /* can't build Unicode map for CID-keyed font */
146    /* because we don't know glyph names.         */
147    if ( !charset->sids )
148      return CFF_Err_No_Unicode_Glyph_Name;
149
150    return psnames->unicodes_init( memory,
151                                   unicodes,
152                                   cff->num_glyphs,
153                                   (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
154                                   (PS_FreeGlyphNameFunc)NULL,
155                                   (FT_Pointer)face );
156  }
157
158
159  FT_CALLBACK_DEF( void )
160  cff_cmap_unicode_done( PS_Unicodes  unicodes )
161  {
162    FT_Face    face   = FT_CMAP_FACE( unicodes );
163    FT_Memory  memory = FT_FACE_MEMORY( face );
164
165
166    FT_FREE( unicodes->maps );
167    unicodes->num_maps = 0;
168  }
169
170
171  FT_CALLBACK_DEF( FT_UInt )
172  cff_cmap_unicode_char_index( PS_Unicodes  unicodes,
173                               FT_UInt32    char_code )
174  {
175    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
176    CFF_Font            cff     = (CFF_Font)face->extra.data;
177    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
178
179
180    return psnames->unicodes_char_index( unicodes, char_code );
181  }
182
183
184  FT_CALLBACK_DEF( FT_UInt32 )
185  cff_cmap_unicode_char_next( PS_Unicodes  unicodes,
186                              FT_UInt32   *pchar_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_next( unicodes, pchar_code );
194  }
195
196
197  FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec,
198    sizeof ( PS_UnicodesRec ),
199
200    (FT_CMap_InitFunc)     cff_cmap_unicode_init,
201    (FT_CMap_DoneFunc)     cff_cmap_unicode_done,
202    (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index,
203    (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next,
204
205    NULL, NULL, NULL, NULL, NULL
206  )
207
208/* END */