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/CachedFace.h"
30 :
31 :
32 : using namespace graphite2;
33 :
34 : extern "C" {
35 :
36 :
37 0 : gr_face* gr_make_face(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn getTable, unsigned int faceOptions)
38 : //the appFaceHandle must stay alive all the time when the gr_face is alive. When finished with the gr_face, call destroy_face
39 : {
40 0 : Face *res = new Face(appFaceHandle, getTable);
41 :
42 0 : if (res->getTable(Tag::Silf) == 0)
43 : {
44 0 : if (!(faceOptions & gr_face_dumbRendering))
45 : {
46 0 : delete res;
47 0 : return 0;
48 : }
49 : }
50 : else
51 0 : faceOptions &= ~gr_face_dumbRendering;
52 :
53 0 : bool valid = true;
54 0 : valid &= res->readGlyphs(faceOptions);
55 0 : if (!valid) {
56 0 : delete res;
57 0 : return 0;
58 : }
59 0 : valid &= res->readFeatures();
60 0 : valid &= res->readGraphite();
61 :
62 0 : if (!(faceOptions & gr_face_dumbRendering) && !valid) {
63 0 : delete res;
64 0 : return 0;
65 : }
66 0 : return static_cast<gr_face *>(res);
67 : }
68 :
69 : #ifndef GRAPHITE2_NSEGCACHE
70 : gr_face* gr_make_face_with_seg_cache(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn getTable, unsigned int cacheSize, unsigned int faceOptions)
71 : //the appFaceHandle must stay alive all the time when the GrFace is alive. When finished with the GrFace, call destroy_face
72 : {
73 : CachedFace *res = new CachedFace(appFaceHandle, getTable);
74 :
75 : if (res->getTable(Tag::Silf) == 0)
76 : {
77 : if (!(faceOptions & gr_face_dumbRendering))
78 : {
79 : delete res;
80 : return 0;
81 : }
82 : }
83 : else
84 : faceOptions &= ~gr_face_dumbRendering;
85 :
86 : bool valid = true;
87 : valid &= res->readGlyphs(faceOptions);
88 : if (!valid) {
89 : delete res;
90 : return 0;
91 : }
92 : valid &= res->readFeatures();
93 : valid &= res->readGraphite();
94 : valid &= res->setupCache(cacheSize);
95 :
96 : if (!(faceOptions & gr_face_dumbRendering) && !valid) {
97 : delete res;
98 : return 0;
99 : }
100 : return static_cast<gr_face *>(static_cast<Face *>(res));
101 : }
102 : #endif
103 :
104 0 : gr_uint32 gr_str_to_tag(const char *str)
105 : {
106 0 : uint32 res = 0;
107 0 : int i = strlen(str);
108 0 : if (i > 4) i = 4;
109 0 : while (--i >= 0)
110 0 : res = (res >> 8) + (str[i] << 24);
111 0 : return res;
112 : }
113 :
114 0 : void gr_tag_to_str(gr_uint32 tag, char *str)
115 : {
116 0 : int i = 4;
117 0 : while (--i >= 0)
118 : {
119 0 : str[i] = tag & 0xFF;
120 0 : tag >>= 8;
121 : }
122 0 : }
123 :
124 :
125 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
126 : {
127 0 : assert(pFace);
128 0 : if (langname == 0x20202020) langname = 0;
129 0 : else if ((langname & 0x00FFFFFF) == 0x00202020) langname = langname & 0xFF000000;
130 0 : else if ((langname & 0x0000FFFF) == 0x00002020) langname = langname & 0xFFFF0000;
131 0 : else if ((langname & 0x000000FF) == 0x00000020) langname = langname & 0xFFFFFF00;
132 0 : return static_cast<gr_feature_val *>(pFace->theSill().cloneFeatures(langname));
133 : }
134 :
135 :
136 0 : const gr_feature_ref* gr_face_find_fref(const gr_face* pFace, gr_uint32 featId) //When finished with the FeatureRef, call destroy_FeatureRef
137 : {
138 0 : assert(pFace);
139 0 : const FeatureRef* pRef = pFace->featureById(featId);
140 0 : return static_cast<const gr_feature_ref*>(pRef);
141 : }
142 :
143 0 : unsigned short gr_face_n_fref(const gr_face* pFace)
144 : {
145 0 : assert(pFace);
146 0 : return pFace->numFeatures();
147 : }
148 :
149 0 : const gr_feature_ref* gr_face_fref(const gr_face* pFace, gr_uint16 i) //When finished with the FeatureRef, call destroy_FeatureRef
150 : {
151 0 : assert(pFace);
152 0 : const FeatureRef* pRef = pFace->feature(i);
153 0 : return static_cast<const gr_feature_ref*>(pRef);
154 : }
155 :
156 0 : unsigned short gr_face_n_languages(const gr_face* pFace)
157 : {
158 0 : assert(pFace);
159 0 : return pFace->theSill().numLanguages();
160 : }
161 :
162 0 : gr_uint32 gr_face_lang_by_index(const gr_face* pFace, gr_uint16 i)
163 : {
164 0 : assert(pFace);
165 0 : return pFace->theSill().getLangName(i);
166 : }
167 :
168 :
169 0 : void gr_face_destroy(gr_face *face)
170 : {
171 0 : delete face;
172 0 : }
173 :
174 :
175 0 : gr_uint16 gr_face_name_lang_for_locale(gr_face *face, const char * locale)
176 : {
177 0 : if (face)
178 : {
179 0 : return face->languageForLocale(locale);
180 : }
181 0 : return 0;
182 : }
183 :
184 : #if 0 //hidden since no way to release atm.
185 :
186 : uint16 *face_name(const gr_face * pFace, uint16 nameid, uint16 lid)
187 : {
188 : size_t nLen = 0, lOffset = 0, lSize = 0;
189 : const void *pName = pFace->getTable(tagName, &nLen);
190 : uint16 *res;
191 : if (!pName || !TtfUtil::GetNameInfo(pName, 3, 0, lid, nameid, lOffset, lSize))
192 : return NULL;
193 : lSize >>= 1;
194 : res = gralloc<uint16>(lSize + 1);
195 : for (size_t i = 0; i < lSize; ++i)
196 : res[i] = swap16(*(uint16 *)((char *)pName + lOffset));
197 : res[lSize] = 0;
198 : return res;
199 : }
200 : #endif
201 :
202 0 : unsigned short gr_face_n_glyphs(const gr_face* pFace)
203 : {
204 0 : return pFace->getGlyphFaceCache()->numGlyphs();
205 : }
206 :
207 :
208 : #ifndef GRAPHITE2_NFILEFACE
209 : gr_face* gr_make_file_face(const char *filename, unsigned int faceOptions)
210 : {
211 : FileFace* pFileFace = new FileFace(filename);
212 : if (pFileFace->m_pTableDir)
213 : {
214 : gr_face* pRes =gr_make_face(pFileFace, &FileFace::table_fn, faceOptions);
215 : if (pRes)
216 : {
217 : pRes->takeFileFace(pFileFace); //takes ownership
218 : return pRes;
219 : }
220 : }
221 :
222 : //error when loading
223 :
224 : delete pFileFace;
225 : return NULL;
226 : }
227 :
228 : #ifndef GRAPHITE2_NSEGCACHE
229 : 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
230 : //when finished with, call destroy_face
231 : {
232 : FileFace* pFileFace = new FileFace(filename);
233 : if (pFileFace->m_pTableDir)
234 : {
235 : gr_face* pRes = gr_make_face_with_seg_cache(pFileFace, &FileFace::table_fn, segCacheMaxSize, faceOptions);
236 : if (pRes)
237 : {
238 : pRes->takeFileFace(pFileFace); //takes ownership
239 : return pRes;
240 : }
241 : }
242 :
243 : //error when loading
244 :
245 : delete pFileFace;
246 : return NULL;
247 : }
248 : #endif
249 : #endif //!GRAPHITE2_NFILEFACE
250 :
251 :
252 : } // extern "C"
253 :
254 :
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