[Complex Text Layouts] Add third-party TextServer dependencies (ICU, HarfBuzz, Graphite).

thirdparty/graphite/src/gr_face.cpp

@@ -0,0 +1,267 @@
+/*  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"