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-rw-r--r--gfx/graphite2/src/gr_face.cpp267
1 files changed, 267 insertions, 0 deletions
diff --git a/gfx/graphite2/src/gr_face.cpp b/gfx/graphite2/src/gr_face.cpp
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+++ b/gfx/graphite2/src/gr_face.cpp
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+/* 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/CmapCache.h"
+#include "inc/Silf.h"
+#include "inc/json.h"
+
+using namespace graphite2;
+
+#if !defined GRAPHITE2_NTRACING
+extern json *global_log;
+#endif
+
+namespace
+{
+ bool load_face(Face & face, unsigned int options)
+ {
+#ifdef GRAPHITE2_TELEMETRY
+ telemetry::category _misc_cat(face.tele.misc);
+#endif
+ Face::Table silf(face, Tag::Silf, 0x00050000);
+ if (!silf)
+ return false;
+
+ if (!face.readGlyphs(options))
+ return false;
+
+ if (silf)
+ {
+ if (!face.readFeatures() || !face.readGraphite(silf))
+ {
+#if !defined GRAPHITE2_NTRACING
+ if (global_log)
+ {
+ *global_log << json::object
+ << "type" << "fontload"
+ << "failure" << face.error()
+ << "context" << face.error_context()
+ << json::close;
+ }
+#endif
+ return false;
+ }
+ else
+ return true;
+ }
+ else
+ return false;
+ }
+
+ 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;
+ }
+}
+
+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);
+}
+
+
+gr_face* gr_make_face_with_seg_cache_and_ops(const void* appFaceHandle/*non-NULL*/, const gr_face_ops *ops, unsigned int , unsigned int faceOptions)
+{
+ return gr_make_face_with_ops(appFaceHandle, ops, faceOptions);
+}
+
+gr_face* gr_make_face_with_seg_cache(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn tablefn, unsigned int, unsigned int faceOptions)
+{
+ const gr_face_ops ops = {sizeof(gr_face_ops), tablefn, NULL};
+ return gr_make_face_with_ops(appFaceHandle, &ops, faceOptions);
+}
+
+gr_uint32 gr_str_to_tag(const char *str)
+{
+ uint32 res = 0;
+ switch(max(strlen(str),size_t(4)))
+ {
+ case 4: res |= str[3]; GR_FALLTHROUGH;
+ case 3: res |= str[2] << 8; GR_FALLTHROUGH;
+ case 2: res |= str[1] << 16; GR_FALLTHROUGH;
+ case 1: res |= str[0] << 24; GR_FALLTHROUGH;
+ default: break;
+ }
+ return res;
+}
+
+void gr_tag_to_str(gr_uint32 tag, char *str)
+{
+ if (!str) return;
+
+ *str++ = char(tag >> 24);
+ *str++ = char(tag >> 16);
+ *str++ = char(tag >> 8);
+ *str++ = char(tag);
+ *str = '\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
+{
+ assert(pFace);
+ langname = 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);
+ featId = 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);
+ int res = 0;
+ for (int i = 0; i < pFace->numFeatures(); ++i)
+ if (!(pFace->feature(i)->getFlags() & FeatureRef::HIDDEN))
+ ++res;
+ return res;
+}
+
+const gr_feature_ref* gr_face_fref(const gr_face* pFace, gr_uint16 i) //When finished with the FeatureRef, call destroy_FeatureRef
+{
+ assert(pFace);
+ int count = 0;
+ for (int j = 0; j < pFace->numFeatures(); ++j)
+ {
+ const FeatureRef* pRef = pFace->feature(j);
+ if (!(pRef->getFlags() & FeatureRef::HIDDEN))
+ if (count++ == i)
+ return static_cast<const gr_feature_ref*>(pRef);
+ }
+ return 0;
+}
+
+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 static_cast<Face*>(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;
+}
+
+gr_face* gr_make_file_face_with_seg_cache(const char* filename, unsigned int, unsigned int faceOptions) //returns NULL on failure. //TBD better error handling
+ //when finished with, call destroy_face
+{
+ return gr_make_file_face(filename, faceOptions);
+}
+#endif //!GRAPHITE2_NFILEFACE
+
+} // extern "C"
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