1/***************************************************************************/
2/*                                                                         */
3/*  cffcmap.c                                                              */
4/*                                                                         */
5/*    CFF character mapping table (cmap) support (body).                   */
6/*                                                                         */
7/*  Copyright 2002-2007, 2010, 2013 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  {
38    TT_Face       face     = (TT_Face)FT_CMAP_FACE( cmap );
39    CFF_Font      cff      = (CFF_Font)face->extra.data;
40    CFF_Encoding  encoding = &cff->encoding;
41
42
43    cmap->gids  = encoding->codes;
44
45    return 0;
46  }
47
48
49  FT_CALLBACK_DEF( void )
50  cff_cmap_encoding_done( CFF_CMapStd  cmap )
51  {
52    cmap->gids  = NULL;
53  }
54
55
56  FT_CALLBACK_DEF( FT_UInt )
57  cff_cmap_encoding_char_index( CFF_CMapStd  cmap,
58                                FT_UInt32    char_code )
59  {
60    FT_UInt  result = 0;
61
62
63    if ( char_code < 256 )
64      result = cmap->gids[char_code];
65
66    return result;
67  }
68
69
70  FT_CALLBACK_DEF( FT_UInt32 )
71  cff_cmap_encoding_char_next( CFF_CMapStd   cmap,
72                               FT_UInt32    *pchar_code )
73  {
74    FT_UInt    result    = 0;
75    FT_UInt32  char_code = *pchar_code;
76
77
78    *pchar_code = 0;
79
80    if ( char_code < 255 )
81    {
82      FT_UInt  code = (FT_UInt)(char_code + 1);
83
84
85      for (;;)
86      {
87        if ( code >= 256 )
88          break;
89
90        result = cmap->gids[code];
91        if ( result != 0 )
92        {
93          *pchar_code = code;
94          break;
95        }
96
97        code++;
98      }
99    }
100    return result;
101  }
102
103
104  FT_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec,
105    sizeof ( CFF_CMapStdRec ),
106
107    (FT_CMap_InitFunc)     cff_cmap_encoding_init,
108    (FT_CMap_DoneFunc)     cff_cmap_encoding_done,
109    (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index,
110    (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next,
111
112    NULL, NULL, NULL, NULL, NULL
113  )
114
115
116  /*************************************************************************/
117  /*************************************************************************/
118  /*****                                                               *****/
119  /*****              CFF SYNTHETIC UNICODE ENCODING CMAP              *****/
120  /*****                                                               *****/
121  /*************************************************************************/
122  /*************************************************************************/
123
124  FT_CALLBACK_DEF( const char* )
125  cff_sid_to_glyph_name( TT_Face  face,
126                         FT_UInt  idx )
127  {
128    CFF_Font     cff     = (CFF_Font)face->extra.data;
129    CFF_Charset  charset = &cff->charset;
130    FT_UInt      sid     = charset->sids[idx];
131
132
133    return cff_index_get_sid_string( cff, sid );
134  }
135
136
137  FT_CALLBACK_DEF( FT_Error )
138  cff_cmap_unicode_init( PS_Unicodes  unicodes )
139  {
140    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
141    FT_Memory           memory  = FT_FACE_MEMORY( face );
142    CFF_Font            cff     = (CFF_Font)face->extra.data;
143    CFF_Charset         charset = &cff->charset;
144    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
145
146
147    /* can't build Unicode map for CID-keyed font */
148    /* because we don't know glyph names.         */
149    if ( !charset->sids )
150      return FT_THROW( No_Unicode_Glyph_Name );
151
152    return psnames->unicodes_init( memory,
153                                   unicodes,
154                                   cff->num_glyphs,
155                                   (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
156                                   (PS_FreeGlyphNameFunc)NULL,
157                                   (FT_Pointer)face );
158  }
159
160
161  FT_CALLBACK_DEF( void )
162  cff_cmap_unicode_done( PS_Unicodes  unicodes )
163  {
164    FT_Face    face   = FT_CMAP_FACE( unicodes );
165    FT_Memory  memory = FT_FACE_MEMORY( face );
166
167
168    FT_FREE( unicodes->maps );
169    unicodes->num_maps = 0;
170  }
171
172
173  FT_CALLBACK_DEF( FT_UInt )
174  cff_cmap_unicode_char_index( PS_Unicodes  unicodes,
175                               FT_UInt32    char_code )
176  {
177    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
178    CFF_Font            cff     = (CFF_Font)face->extra.data;
179    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
180
181
182    return psnames->unicodes_char_index( unicodes, char_code );
183  }
184
185
186  FT_CALLBACK_DEF( FT_UInt32 )
187  cff_cmap_unicode_char_next( PS_Unicodes  unicodes,
188                              FT_UInt32   *pchar_code )
189  {
190    TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
191    CFF_Font            cff     = (CFF_Font)face->extra.data;
192    FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
193
194
195    return psnames->unicodes_char_next( unicodes, pchar_code );
196  }
197
198
199  FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec,
200    sizeof ( PS_UnicodesRec ),
201
202    (FT_CMap_InitFunc)     cff_cmap_unicode_init,
203    (FT_CMap_DoneFunc)     cff_cmap_unicode_done,
204    (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index,
205    (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next,
206
207    NULL, NULL, NULL, NULL, NULL
208  )
209
210/* END */
211