The Tor Browser: gfx/graphite2/src/Face.cpp@b8a032363ba2 (annotated)

gfx/graphite2/src/Face.cpp@b8a032363ba2 (annotated)

gfx/graphite2/src/Face.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*  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 <cstring>
 #include "graphite2/Segment.h"
 #include "inc/CmapCache.h"
 #include "inc/debug.h"
 #include "inc/Endian.h"
 #include "inc/Face.h"
 #include "inc/FileFace.h"
 #include "inc/GlyphFace.h"
 #include "inc/json.h"
 #include "inc/SegCacheStore.h"
 #include "inc/Segment.h"
 #include "inc/NameTable.h"
 #include "inc/Error.h"
 using namespace graphite2;
 Face::Face(const void* appFaceHandle/*non-NULL*/, const gr_face_ops & ops)
 : m_appFaceHandle(appFaceHandle),
   m_pFileFace(NULL),
   m_pGlyphFaceCache(NULL),
   m_cmap(NULL),
   m_pNames(NULL),
   m_logger(NULL),
   m_error(0), m_errcntxt(0),
   m_silfs(NULL),
   m_numSilf(0),
   m_ascent(0),
   m_descent(0)
 {
     memset(&m_ops, 0, sizeof m_ops);
     memcpy(&m_ops, &ops, min(sizeof m_ops, ops.size));
 }
 Face::~Face()
 {
     setLogger(0);
     delete m_pGlyphFaceCache;
     delete m_cmap;
     delete[] m_silfs;
 #ifndef GRAPHITE2_NFILEFACE
     delete m_pFileFace;
 #endif
     delete m_pNames;
 }
 float Face::default_glyph_advance(const void* font_ptr, gr_uint16 glyphid)
 {
     const Font & font = *reinterpret_cast<const Font *>(font_ptr);
     return font.face().glyphs().glyph(glyphid)->theAdvance().x * font.scale();
 }
 bool Face::readGlyphs(uint32 faceOptions)
 {
     Error e;
 #ifdef GRAPHITE2_TELEMETRY
     telemetry::category _glyph_cat(tele.glyph);
 #endif
     error_context(EC_READGLYPHS);
     if (faceOptions & gr_face_cacheCmap)
         m_cmap = new CachedCmap(*this);
     else
         m_cmap = new DirectCmap(*this);
     m_pGlyphFaceCache = new GlyphCache(*this, faceOptions);
     if (e.test(!m_pGlyphFaceCache, E_OUTOFMEM)
         || e.test(m_pGlyphFaceCache->numGlyphs() == 0, E_NOGLYPHS)
         || e.test(m_pGlyphFaceCache->unitsPerEm() == 0, E_BADUPEM)
         || e.test(!m_cmap, E_OUTOFMEM) || e.test(!*m_cmap, E_BADCMAP))
     {
         return error(e);
     }
     if (faceOptions & gr_face_preloadGlyphs)
         nameTable();        // preload the name table along with the glyphs.
     return true;
 }
 bool Face::readGraphite(const Table & silf)
 {
 #ifdef GRAPHITE2_TELEMETRY
     telemetry::category _silf_cat(tele.silf);
 #endif
     Error e;
     error_context(EC_READSILF);
     const byte * p = silf;
     if (e.test(!p, E_NOSILF)) return error(e);
     const uint32 version = be::read<uint32>(p);
     if (e.test(version < 0x00020000, E_TOOOLD)) return error(e);
     if (version >= 0x00030000)
         be::skip<uint32>(p);        // compilerVersion
     m_numSilf = be::read<uint16>(p);
     be::skip<uint16>(p);            // reserved
     bool havePasses = false;
     m_silfs = new Silf[m_numSilf];
     for (int i = 0; i < m_numSilf; i++)
     {
         error_context(EC_ASILF + (i << 8));
         const uint32 offset = be::read<uint32>(p),
                      next   = i == m_numSilf - 1 ? silf.size() : be::peek<uint32>(p);
         if (e.test(next > silf.size() || offset >= next, E_BADSIZE))
             return error(e);
         if (!m_silfs[i].readGraphite(silf + offset, next - offset, *this, version))
             return false;
         if (m_silfs[i].numPasses())
             havePasses = true;
     }
     return havePasses;
 }
 bool Face::readFeatures()
 {
     return m_Sill.readFace(*this);
 }
 bool Face::runGraphite(Segment *seg, const Silf *aSilf) const
 {
 #if !defined GRAPHITE2_NTRACING
     json * dbgout = logger();
     if (dbgout)
     {
         *dbgout << json::object
                     << "id"         << objectid(seg)
                     << "passes"     << json::array;
     }
 #endif
     bool res = aSilf->runGraphite(seg, 0, aSilf->justificationPass(), true);
     if (res)
         res = aSilf->runGraphite(seg, aSilf->positionPass(), aSilf->numPasses(), false);
 #if !defined GRAPHITE2_NTRACING
     if (dbgout)
 {
         *dbgout             << json::item
                             << json::close // Close up the passes array
                 << "output" << json::array;
         for(Slot * s = seg->first(); s; s = s->next())
             *dbgout     << dslot(seg, s);
         seg->finalise(0);                   // Call this here to fix up charinfo back indexes.
         *dbgout         << json::close
                 << "advance" << seg->advance()
                 << "chars"   << json::array;
         for(size_t i = 0, n = seg->charInfoCount(); i != n; ++i)
             *dbgout     << json::flat << *seg->charinfo(i);
         *dbgout         << json::close  // Close up the chars array
                     << json::close;     // Close up the segment object
     }
 #endif
     return res;
 }
 void Face::setLogger(FILE * log_file GR_MAYBE_UNUSED)
 {
 #if !defined GRAPHITE2_NTRACING
     delete m_logger;
     m_logger = log_file ? new json(log_file) : 0;
 #endif
 }
 const Silf *Face::chooseSilf(uint32 script) const
 {
     if (m_numSilf == 0)
         return NULL;
     else if (m_numSilf == 1 || script == 0)
         return m_silfs;
     else // do more work here
         return m_silfs;
 }
 uint16 Face::findPseudo(uint32 uid) const
 {
     return (m_numSilf) ? m_silfs[0].findPseudo(uid) : 0;
 }
 uint16 Face::getGlyphMetric(uint16 gid, uint8 metric) const
 {
     switch (metrics(metric))
     {
         case kgmetAscent : return m_ascent;
         case kgmetDescent : return m_descent;
         default: return glyphs().glyph(gid)->getMetric(metric);
     }
 }
 void Face::takeFileFace(FileFace* pFileFace GR_MAYBE_UNUSED/*takes ownership*/)
 {
 #ifndef GRAPHITE2_NFILEFACE
     if (m_pFileFace==pFileFace)
       return;
     delete m_pFileFace;
     m_pFileFace = pFileFace;
 #endif
 }
 NameTable * Face::nameTable() const
 {
     if (m_pNames) return m_pNames;
     const Table name(*this, Tag::name);
     if (name)
         m_pNames = new NameTable(name, name.size());
     return m_pNames;
 }
 uint16 Face::languageForLocale(const char * locale) const
 {
     nameTable();
     if (m_pNames)
         return m_pNames->getLanguageId(locale);
     return 0;
 }
 Face::Table::Table(const Face & face, const Tag n) throw()
 : _f(&face)
 {
     size_t sz = 0;
     _p = reinterpret_cast<const byte *>((*_f->m_ops.get_table)(_f->m_appFaceHandle, n, &sz));
     _sz = uint32(sz);
     if (!TtfUtil::CheckTable(n, _p, _sz))
     {
         this->~Table();     // Make sure we release the table buffer even if the table filed it's checks
         _p = 0; _sz = 0;
     }
 }
 Face::Table & Face::Table::operator = (const Table & rhs) throw()
 {
     if (_p == rhs._p)   return *this;
     this->~Table();
     new (this) Table(rhs);
     return *this;
 }

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gfx/graphite2/src/Face.cpp@b8a032363ba2 (annotated)

gfx/graphite2/src/Face.cpp