LCOV - code coverage report
Current view: directory - gfx/graphite2/src/inc - GlyphFaceCache.h (source / functions) Found Hit Coverage
Test: app.info Lines: 8 0 0.0 %
Date: 2012-06-02 Functions: 7 0 0.0 %

       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                 : #pragma once
      28                 : 
      29                 : #include "inc/GlyphFace.h"
      30                 : #include "graphite2/Font.h"
      31                 : 
      32                 : namespace graphite2 {
      33                 : 
      34                 : class Segment;
      35                 : class Face;
      36                 : class FeatureVal;
      37                 : 
      38                 : 
      39                 : class GlyphFaceCacheHeader
      40                 : {
      41                 : public:
      42                 :     bool initialize(const Face & face, const bool dumb_font);    //return result indicates success. Do not use if failed.
      43               0 :     unsigned short numGlyphs() const { return m_nGlyphs; }
      44               0 :     unsigned short numAttrs() const { return m_numAttrs; }
      45                 : 
      46                 : private:
      47                 : friend class Face;
      48                 : friend class GlyphFace;
      49                 :     const byte* m_pHead,
      50                 :                   * m_pHHea,
      51                 :                   * m_pHmtx,
      52                 :                   * m_pGlat,
      53                 :                   * m_pGloc,
      54                 :                   * m_pGlyf,
      55                 :                   * m_pLoca;
      56                 :     size_t              m_lHmtx,
      57                 :                         m_lGlat,
      58                 :                         m_lGlyf,
      59                 :                         m_lLoca;
      60                 : 
      61                 :     uint32                      m_fGlat;
      62                 :     unsigned short      m_numAttrs,                                     // number of glyph attributes per glyph
      63                 :                                 m_nGlyphsWithGraphics,          //i.e. boundary box and advance
      64                 :                                 m_nGlyphsWithAttributes,
      65                 :                                 m_nGlyphs;                                      // number of glyphs in the font. Max of the above 2.
      66                 :     bool                        m_locFlagsUse32Bit;
      67                 : };
      68                 : 
      69                 : class GlyphFaceCache : public GlyphFaceCacheHeader
      70                 : {
      71                 : public:
      72                 :     static GlyphFaceCache* makeCache(const GlyphFaceCacheHeader& hdr /*, EGlyphCacheStrategy requested */);
      73                 : 
      74                 :     GlyphFaceCache(const GlyphFaceCacheHeader& hdr);
      75                 :     ~GlyphFaceCache();
      76                 : 
      77               0 :     const GlyphFace *glyphSafe(unsigned short glyphid) const { return glyphid<numGlyphs()?glyph(glyphid):NULL; }
      78               0 :     uint16 glyphAttr(uint16 gid, uint8 gattr) const { if (gattr>=numAttrs()) return 0; const GlyphFace*p=glyphSafe(gid); return p?p->getAttr(gattr):0; }
      79                 : 
      80               0 :     void * operator new (size_t s, const GlyphFaceCacheHeader& hdr)
      81                 :     {
      82               0 :         return malloc(s + sizeof(GlyphFace*)*hdr.numGlyphs());
      83                 :     }
      84                 :     // delete in case an exception is thrown in constructor
      85                 :     void operator delete(void* p, const GlyphFaceCacheHeader& ) throw()
      86                 :     {
      87                 :         free(p);
      88                 :     }
      89                 : 
      90                 :     const GlyphFace *glyph(unsigned short glyphid) const;      //result may be changed by subsequent call with a different glyphid
      91                 :     void loadAllGlyphs();
      92                 : 
      93               0 :     CLASS_NEW_DELETE
      94                 :     
      95                 : private:
      96               0 :     GlyphFace **glyphPtrDirect(unsigned short glyphid) const { return (GlyphFace **)((const char*)(this)+sizeof(GlyphFaceCache)+sizeof(GlyphFace*)*glyphid);}
      97                 : 
      98                 : private:      //defensive
      99                 :     GlyphFaceCache(const GlyphFaceCache&);
     100                 :     GlyphFaceCache& operator=(const GlyphFaceCache&);
     101                 : };
     102                 : 
     103                 : } // namespace graphite2

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