1/****************************************************************************
2 *
3 * cffcmap.c
4 *
5 * CFF character mapping table (cmap) support (body).
6 *
7 * Copyright (C) 2002-2019 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 if ( !psnames->unicodes_init )
165 return FT_THROW( Unimplemented_Feature );
166
167 return psnames->unicodes_init( memory,
168 unicodes,
169 cff->num_glyphs,
170 (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
171 (PS_FreeGlyphNameFunc)NULL,
172 (FT_Pointer)face );
173 }
174
175
176 FT_CALLBACK_DEF( void )
177 cff_cmap_unicode_done( PS_Unicodes unicodes )
178 {
179 FT_Face face = FT_CMAP_FACE( unicodes );
180 FT_Memory memory = FT_FACE_MEMORY( face );
181
182
183 FT_FREE( unicodes->maps );
184 unicodes->num_maps = 0;
185 }
186
187
188 FT_CALLBACK_DEF( FT_UInt )
189 cff_cmap_unicode_char_index( PS_Unicodes unicodes,
190 FT_UInt32 char_code )
191 {
192 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
193 CFF_Font cff = (CFF_Font)face->extra.data;
194 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
195
196
197 return psnames->unicodes_char_index( unicodes, char_code );
198 }
199
200
201 FT_CALLBACK_DEF( FT_UInt32 )
202 cff_cmap_unicode_char_next( PS_Unicodes unicodes,
203 FT_UInt32 *pchar_code )
204 {
205 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
206 CFF_Font cff = (CFF_Font)face->extra.data;
207 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
208
209
210 return psnames->unicodes_char_next( unicodes, pchar_code );
211 }
212
213
214 FT_DEFINE_CMAP_CLASS(
215 cff_cmap_unicode_class_rec,
216
217 sizeof ( PS_UnicodesRec ),
218
219 (FT_CMap_InitFunc) cff_cmap_unicode_init, /* init */
220 (FT_CMap_DoneFunc) cff_cmap_unicode_done, /* done */
221 (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, /* char_index */
222 (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, /* char_next */
223
224 (FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */
225 (FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */
226 (FT_CMap_VariantListFunc) NULL, /* variant_list */
227 (FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */
228 (FT_CMap_VariantCharListFunc) NULL /* variantchar_list */
229 )
230
231
232/* END */
233