Line data Source code
1 : /* GRAPHITE2 LICENSING
2 :
3 : Copyright 2010, SIL International
4 : All rights reserved.
5 :
6 : This library is free software; you can redistribute it and/or modify
7 : it under the terms of the GNU Lesser General Public License as published
8 : by the Free Software Foundation; either version 2.1 of License, or
9 : (at your option) any later version.
10 :
11 : This program is distributed in the hope that it will be useful,
12 : but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 : Lesser General Public License for more details.
15 :
16 : You should also have received a copy of the GNU Lesser General Public
17 : License along with this library in the file named "LICENSE".
18 : If not, write to the Free Software Foundation, 51 Franklin Street,
19 : Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
20 : internet at http://www.fsf.org/licenses/lgpl.html.
21 :
22 : Alternatively, the contents of this file may be used under the terms of the
23 : Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
24 : License, as published by the Free Software Foundation, either version 2
25 : of the License or (at your option) any later version.
26 : */
27 : #include "graphite2/Font.h"
28 : #include "inc/Face.h"
29 : #include "inc/FileFace.h"
30 : #include "inc/GlyphCache.h"
31 : #include "inc/CachedFace.h"
32 : #include "inc/CmapCache.h"
33 : #include "inc/Silf.h"
34 : #include "inc/json.h"
35 :
36 : using namespace graphite2;
37 :
38 : #if !defined GRAPHITE2_NTRACING
39 : extern json *global_log;
40 : #endif
41 :
42 : namespace
43 : {
44 0 : bool load_face(Face & face, unsigned int options)
45 : {
46 : #ifdef GRAPHITE2_TELEMETRY
47 : telemetry::category _misc_cat(face.tele.misc);
48 : #endif
49 0 : Face::Table silf(face, Tag::Silf, 0x00050000);
50 0 : if (silf) options &= ~gr_face_dumbRendering;
51 0 : else if (!(options & gr_face_dumbRendering))
52 0 : return false;
53 :
54 0 : if (!face.readGlyphs(options))
55 0 : return false;
56 :
57 0 : if (silf)
58 : {
59 0 : if (!face.readFeatures() || !face.readGraphite(silf))
60 : {
61 : #if !defined GRAPHITE2_NTRACING
62 : if (global_log)
63 : {
64 : *global_log << json::object
65 : << "type" << "fontload"
66 : << "failure" << face.error()
67 : << "context" << face.error_context()
68 : << json::close;
69 : }
70 : #endif
71 0 : return false;
72 : }
73 : else
74 0 : return true;
75 : }
76 : else
77 0 : return options & gr_face_dumbRendering;
78 : }
79 : }
80 :
81 : extern "C" {
82 :
83 0 : gr_face* gr_make_face_with_ops(const void* appFaceHandle/*non-NULL*/, const gr_face_ops *ops, unsigned int faceOptions)
84 : //the appFaceHandle must stay alive all the time when the gr_face is alive. When finished with the gr_face, call destroy_face
85 : {
86 0 : if (ops == 0) return 0;
87 :
88 0 : Face *res = new Face(appFaceHandle, *ops);
89 0 : if (res && load_face(*res, faceOptions))
90 0 : return static_cast<gr_face *>(res);
91 :
92 0 : delete res;
93 0 : return 0;
94 : }
95 :
96 0 : gr_face* gr_make_face(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn tablefn, unsigned int faceOptions)
97 : {
98 0 : const gr_face_ops ops = {sizeof(gr_face_ops), tablefn, NULL};
99 0 : return gr_make_face_with_ops(appFaceHandle, &ops, faceOptions);
100 : }
101 :
102 : #ifndef GRAPHITE2_NSEGCACHE
103 : gr_face* gr_make_face_with_seg_cache_and_ops(const void* appFaceHandle/*non-NULL*/, const gr_face_ops *ops, unsigned int cacheSize, unsigned int faceOptions)
104 : //the appFaceHandle must stay alive all the time when the GrFace is alive. When finished with the GrFace, call destroy_face
105 : {
106 : if (ops == 0) return 0;
107 :
108 : CachedFace *res = new CachedFace(appFaceHandle, *ops);
109 : if (res && load_face(*res, faceOptions)
110 : && res->setupCache(cacheSize))
111 : return static_cast<gr_face *>(static_cast<Face *>(res));
112 :
113 : delete res;
114 : return 0;
115 : }
116 :
117 : gr_face* gr_make_face_with_seg_cache(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn getTable, unsigned int cacheSize, unsigned int faceOptions)
118 : {
119 : const gr_face_ops ops = {sizeof(gr_face_ops), getTable, NULL};
120 : return gr_make_face_with_seg_cache_and_ops(appFaceHandle, &ops, cacheSize, faceOptions);
121 : }
122 : #endif
123 :
124 0 : gr_uint32 gr_str_to_tag(const char *str)
125 : {
126 0 : uint32 res = 0;
127 0 : int i = strlen(str);
128 0 : if (i > 4) i = 4;
129 0 : while (--i >= 0)
130 0 : res = (res >> 8) + (str[i] << 24);
131 0 : return res;
132 : }
133 :
134 0 : void gr_tag_to_str(gr_uint32 tag, char *str)
135 : {
136 0 : int i = 4;
137 0 : while (--i >= 0)
138 : {
139 0 : str[i] = tag & 0xFF;
140 0 : tag >>= 8;
141 : }
142 0 : }
143 :
144 : inline
145 0 : uint32 zeropad(const uint32 x)
146 : {
147 0 : if (x == 0x20202020) return 0;
148 0 : if ((x & 0x00FFFFFF) == 0x00202020) return x & 0xFF000000;
149 0 : if ((x & 0x0000FFFF) == 0x00002020) return x & 0xFFFF0000;
150 0 : if ((x & 0x000000FF) == 0x00000020) return x & 0xFFFFFF00;
151 0 : return x;
152 : }
153 :
154 0 : gr_feature_val* gr_face_featureval_for_lang(const gr_face* pFace, gr_uint32 langname/*0 means clone default*/) //clones the features. if none for language, clones the default
155 : {
156 0 : assert(pFace);
157 0 : langname = zeropad(langname);
158 0 : return static_cast<gr_feature_val *>(pFace->theSill().cloneFeatures(langname));
159 : }
160 :
161 :
162 0 : const gr_feature_ref* gr_face_find_fref(const gr_face* pFace, gr_uint32 featId) //When finished with the FeatureRef, call destroy_FeatureRef
163 : {
164 0 : assert(pFace);
165 0 : featId = zeropad(featId);
166 0 : const FeatureRef* pRef = pFace->featureById(featId);
167 0 : return static_cast<const gr_feature_ref*>(pRef);
168 : }
169 :
170 0 : unsigned short gr_face_n_fref(const gr_face* pFace)
171 : {
172 0 : assert(pFace);
173 0 : return pFace->numFeatures();
174 : }
175 :
176 0 : const gr_feature_ref* gr_face_fref(const gr_face* pFace, gr_uint16 i) //When finished with the FeatureRef, call destroy_FeatureRef
177 : {
178 0 : assert(pFace);
179 0 : const FeatureRef* pRef = pFace->feature(i);
180 0 : return static_cast<const gr_feature_ref*>(pRef);
181 : }
182 :
183 0 : unsigned short gr_face_n_languages(const gr_face* pFace)
184 : {
185 0 : assert(pFace);
186 0 : return pFace->theSill().numLanguages();
187 : }
188 :
189 0 : gr_uint32 gr_face_lang_by_index(const gr_face* pFace, gr_uint16 i)
190 : {
191 0 : assert(pFace);
192 0 : return pFace->theSill().getLangName(i);
193 : }
194 :
195 :
196 0 : void gr_face_destroy(gr_face *face)
197 : {
198 0 : delete face;
199 0 : }
200 :
201 :
202 0 : gr_uint16 gr_face_name_lang_for_locale(gr_face *face, const char * locale)
203 : {
204 0 : if (face)
205 : {
206 0 : return face->languageForLocale(locale);
207 : }
208 0 : return 0;
209 : }
210 :
211 0 : unsigned short gr_face_n_glyphs(const gr_face* pFace)
212 : {
213 0 : return pFace->glyphs().numGlyphs();
214 : }
215 :
216 0 : const gr_faceinfo *gr_face_info(const gr_face *pFace, gr_uint32 script)
217 : {
218 0 : if (!pFace) return 0;
219 0 : const Silf *silf = pFace->chooseSilf(script);
220 0 : if (silf) return silf->silfInfo();
221 0 : return 0;
222 : }
223 :
224 0 : int gr_face_is_char_supported(const gr_face* pFace, gr_uint32 usv, gr_uint32 script)
225 : {
226 0 : const Cmap & cmap = pFace->cmap();
227 0 : gr_uint16 gid = cmap[usv];
228 0 : if (!gid)
229 : {
230 0 : const Silf * silf = pFace->chooseSilf(script);
231 0 : gid = silf->findPseudo(usv);
232 : }
233 0 : return (gid != 0);
234 : }
235 :
236 : #ifndef GRAPHITE2_NFILEFACE
237 : gr_face* gr_make_file_face(const char *filename, unsigned int faceOptions)
238 : {
239 : FileFace* pFileFace = new FileFace(filename);
240 : if (*pFileFace)
241 : {
242 : gr_face* pRes = gr_make_face_with_ops(pFileFace, &FileFace::ops, faceOptions);
243 : if (pRes)
244 : {
245 : pRes->takeFileFace(pFileFace); //takes ownership
246 : return pRes;
247 : }
248 : }
249 :
250 : //error when loading
251 :
252 : delete pFileFace;
253 : return NULL;
254 : }
255 :
256 : #ifndef GRAPHITE2_NSEGCACHE
257 : gr_face* gr_make_file_face_with_seg_cache(const char* filename, unsigned int segCacheMaxSize, unsigned int faceOptions) //returns NULL on failure. //TBD better error handling
258 : //when finished with, call destroy_face
259 : {
260 : FileFace* pFileFace = new FileFace(filename);
261 : if (*pFileFace)
262 : {
263 : gr_face * pRes = gr_make_face_with_seg_cache_and_ops(pFileFace, &FileFace::ops, segCacheMaxSize, faceOptions);
264 : if (pRes)
265 : {
266 : pRes->takeFileFace(pFileFace); //takes ownership
267 : return pRes;
268 : }
269 : }
270 :
271 : //error when loading
272 :
273 : delete pFileFace;
274 : return NULL;
275 : }
276 : #endif
277 : #endif //!GRAPHITE2_NFILEFACE
278 :
279 :
280 : } // extern "C"
281 :
282 :
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