diff options
Diffstat (limited to 'Build/source/libs/graphite2/graphite2-1.2.0/src/gr_face.cpp')
| -rw-r--r-- | Build/source/libs/graphite2/graphite2-1.2.0/src/gr_face.cpp | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/Build/source/libs/graphite2/graphite2-1.2.0/src/gr_face.cpp b/Build/source/libs/graphite2/graphite2-1.2.0/src/gr_face.cpp new file mode 100644 index 00000000000..e0f24335522 --- /dev/null +++ b/Build/source/libs/graphite2/graphite2-1.2.0/src/gr_face.cpp @@ -0,0 +1,255 @@ +/* GRAPHITE2 LICENSING + + Copyright 2010, SIL International + All rights reserved. + + This library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should also have received a copy of the GNU Lesser General Public + License along with this library in the file named "LICENSE". + If not, write to the Free Software Foundation, 51 Franklin Street, + Suite 500, Boston, MA 02110-1335, USA or visit their web page on the + internet at http://www.fsf.org/licenses/lgpl.html. + +Alternatively, the contents of this file may be used under the terms of the +Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public +License, as published by the Free Software Foundation, either version 2 +of the License or (at your option) any later version. +*/ +#include "graphite2/Font.h" +#include "inc/Face.h" +#include "inc/FileFace.h" +#include "inc/GlyphCache.h" +#include "inc/CachedFace.h" +#include "inc/CmapCache.h" +#include "inc/Silf.h" + +using namespace graphite2; + +namespace +{ + bool load_face(Face & face, unsigned int options) + { + Face::Table silf(face, Tag::Silf); + if (silf) options &= ~gr_face_dumbRendering; + else if (!(options & gr_face_dumbRendering)) + return false; + + if (!face.readGlyphs(options)) + return false; + + return silf ? face.readFeatures() && face.readGraphite(silf) + : options & gr_face_dumbRendering; + } +} + +extern "C" { + +gr_face* gr_make_face_with_ops(const void* appFaceHandle/*non-NULL*/, const gr_face_ops *ops, unsigned int faceOptions) + //the appFaceHandle must stay alive all the time when the gr_face is alive. When finished with the gr_face, call destroy_face +{ + if (ops == 0) return 0; + + Face *res = new Face(appFaceHandle, *ops); + if (res && load_face(*res, faceOptions)) + return static_cast<gr_face *>(res); + + delete res; + return 0; +} + +gr_face* gr_make_face(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn tablefn, unsigned int faceOptions) +{ + const gr_face_ops ops = {sizeof(gr_face_ops), tablefn, NULL}; + return gr_make_face_with_ops(appFaceHandle, &ops, faceOptions); +} + +#ifndef GRAPHITE2_NSEGCACHE +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) + //the appFaceHandle must stay alive all the time when the GrFace is alive. When finished with the GrFace, call destroy_face +{ + if (ops == 0) return 0; + + CachedFace *res = new CachedFace(appFaceHandle, *ops); + if (res && load_face(*res, faceOptions) + && res->setupCache(cacheSize)) + return static_cast<gr_face *>(static_cast<Face *>(res)); + + delete res; + return 0; +} + +gr_face* gr_make_face_with_seg_cache(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn getTable, unsigned int cacheSize, unsigned int faceOptions) +{ + const gr_face_ops ops = {sizeof(gr_face_ops), getTable, NULL}; + return gr_make_face_with_seg_cache_and_ops(appFaceHandle, &ops, cacheSize, faceOptions); +} +#endif + +gr_uint32 gr_str_to_tag(const char *str) +{ + uint32 res = 0; + int i = strlen(str); + if (i > 4) i = 4; + while (--i >= 0) + res = (res >> 8) + (str[i] << 24); + return res; +} + +void gr_tag_to_str(gr_uint32 tag, char *str) +{ + int i = 4; + while (--i >= 0) + { + str[i] = tag & 0xFF; + tag >>= 8; + } +} + +inline +uint32 zeropad(const uint32 x) +{ + if (x == 0x20202020) return 0; + if ((x & 0x00FFFFFF) == 0x00202020) return x & 0xFF000000; + if ((x & 0x0000FFFF) == 0x00002020) return x & 0xFFFF0000; + if ((x & 0x000000FF) == 0x00000020) return x & 0xFFFFFF00; + return x; +} + +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 +{ + assert(pFace); + zeropad(langname); + return static_cast<gr_feature_val *>(pFace->theSill().cloneFeatures(langname)); +} + + +const gr_feature_ref* gr_face_find_fref(const gr_face* pFace, gr_uint32 featId) //When finished with the FeatureRef, call destroy_FeatureRef +{ + assert(pFace); + zeropad(featId); + const FeatureRef* pRef = pFace->featureById(featId); + return static_cast<const gr_feature_ref*>(pRef); +} + +unsigned short gr_face_n_fref(const gr_face* pFace) +{ + assert(pFace); + return pFace->numFeatures(); +} + +const gr_feature_ref* gr_face_fref(const gr_face* pFace, gr_uint16 i) //When finished with the FeatureRef, call destroy_FeatureRef +{ + assert(pFace); + const FeatureRef* pRef = pFace->feature(i); + return static_cast<const gr_feature_ref*>(pRef); +} + +unsigned short gr_face_n_languages(const gr_face* pFace) +{ + assert(pFace); + return pFace->theSill().numLanguages(); +} + +gr_uint32 gr_face_lang_by_index(const gr_face* pFace, gr_uint16 i) +{ + assert(pFace); + return pFace->theSill().getLangName(i); +} + + +void gr_face_destroy(gr_face *face) +{ + delete face; +} + + +gr_uint16 gr_face_name_lang_for_locale(gr_face *face, const char * locale) +{ + if (face) + { + return face->languageForLocale(locale); + } + return 0; +} + +unsigned short gr_face_n_glyphs(const gr_face* pFace) +{ + return pFace->glyphs().numGlyphs(); +} + +const gr_faceinfo *gr_face_info(const gr_face *pFace, gr_uint32 script) +{ + if (!pFace) return 0; + const Silf *silf = pFace->chooseSilf(script); + if (silf) return silf->silfInfo(); + return 0; +} + +int gr_face_is_char_supported(const gr_face* pFace, gr_uint32 usv, gr_uint32 script) +{ + const Cmap & cmap = pFace->cmap(); + gr_uint16 gid = cmap[usv]; + if (!gid) + { + const Silf * silf = pFace->chooseSilf(script); + gid = silf->findPseudo(usv); + } + return (gid != 0); +} + +#ifndef GRAPHITE2_NFILEFACE +gr_face* gr_make_file_face(const char *filename, unsigned int faceOptions) +{ + FileFace* pFileFace = new FileFace(filename); + if (*pFileFace) + { + gr_face* pRes = gr_make_face_with_ops(pFileFace, &FileFace::ops, faceOptions); + if (pRes) + { + pRes->takeFileFace(pFileFace); //takes ownership + return pRes; + } + } + + //error when loading + + delete pFileFace; + return NULL; +} + +#ifndef GRAPHITE2_NSEGCACHE +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 + //when finished with, call destroy_face +{ + FileFace* pFileFace = new FileFace(filename); + if (*pFileFace) + { + gr_face * pRes = gr_make_face_with_seg_cache_and_ops(pFileFace, &FileFace::ops, segCacheMaxSize, faceOptions); + if (pRes) + { + pRes->takeFileFace(pFileFace); //takes ownership + return pRes; + } + } + + //error when loading + + delete pFileFace; + return NULL; +} +#endif +#endif //!GRAPHITE2_NFILEFACE + + +} // extern "C" + + |