1 /***************************************************************************/
2 /*                                                                         */
3 /*  t1cmap.c                                                               */
4 /*                                                                         */
5 /*    Type 1 character map support (body).                                 */
6 /*                                                                         */
7 /*  Copyright 2002, 2003, 2006, 2007, 2012 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
t1_cmap_std_init(T1_CMapStd cmap,FT_Int is_expert)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 )
t1_cmap_std_done(T1_CMapStd cmap)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 )
t1_cmap_std_char_index(T1_CMapStd cmap,FT_UInt32 char_code)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 )
t1_cmap_std_char_next(T1_CMapStd cmap,FT_UInt32 * pchar_code)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 )
t1_cmap_standard_init(T1_CMapStd cmap)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 )
t1_cmap_expert_init(T1_CMapStd cmap)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 )
t1_cmap_custom_init(T1_CMapCustom cmap)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 )
t1_cmap_custom_done(T1_CMapCustom cmap)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 )
t1_cmap_custom_char_index(T1_CMapCustom cmap,FT_UInt32 char_code)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 )
t1_cmap_custom_char_next(T1_CMapCustom cmap,FT_UInt32 * pchar_code)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 * )
psaux_get_glyph_name(T1_Face face,FT_UInt idx)267   psaux_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 )
t1_cmap_unicode_init(PS_Unicodes unicodes)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)&psaux_get_glyph_name,
286                                    (PS_FreeGlyphNameFunc)NULL,
287                                    (FT_Pointer)face );
288   }
289 
290 
291   FT_CALLBACK_DEF( void )
t1_cmap_unicode_done(PS_Unicodes unicodes)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 )
t1_cmap_unicode_char_index(PS_Unicodes unicodes,FT_UInt32 char_code)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 )
t1_cmap_unicode_char_next(PS_Unicodes unicodes,FT_UInt32 * pchar_code)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 */
342