LCOV - code coverage report
Current view: directory - gfx/graphite2/src/inc - Font.h (source / functions) Found Hit Coverage
Test: app.info Lines: 11 0 0.0 %
Date: 2012-06-02 Functions: 11 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                 : #include <cassert>
      29                 : #include "graphite2/Font.h"
      30                 : #include "inc/Main.h"
      31                 : #include "inc/Face.h"
      32                 : 
      33                 : namespace graphite2 {
      34                 : 
      35                 : #define INVALID_ADVANCE -1e38f          // can't be a static const because non-integral
      36                 : 
      37                 : class Font
      38                 : {
      39                 : public:
      40                 :     Font(float ppm, const Face *face/*needed for scaling*/);
      41                 :     virtual ~Font();
      42                 : 
      43               0 :     float advance(unsigned short glyphid) const {
      44               0 :         if (m_advances[glyphid] == INVALID_ADVANCE)
      45               0 :             m_advances[glyphid] = computeAdvance(glyphid);
      46               0 :         return m_advances[glyphid];
      47                 :     }
      48                 : //    Position scale(const Position& p) const { return Position(m_scale * p.x, m_scale * p.y); }
      49                 : //    float scale(float p) const { return m_scale * p; }
      50               0 :     float scale() const { return m_scale; }
      51               0 :     virtual bool isHinted() const { return false; }
      52                 : 
      53               0 :     CLASS_NEW_DELETE
      54                 : private:
      55               0 :     virtual float computeAdvance(unsigned short /*glyphid*/) const { assert(false); return .0f; };
      56                 :     
      57                 : protected:
      58                 :     float m_scale;      // scales from design units to ppm
      59                 :     float *m_advances;  // One advance per glyph in pixels. Nan if not defined
      60                 :     
      61                 : private:                        //defensive on m_advances
      62                 :     Font(const Font&);
      63                 :     Font& operator=(const Font&);
      64                 : };
      65                 : 
      66                 : 
      67                 : class SimpleFont : public Font      //has no external hints - gets advance information from the face
      68               0 : {
      69                 : public:
      70                 :     SimpleFont(float ppm/*pixels per em*/, const Face *face);
      71                 : private:
      72                 :     virtual float computeAdvance(unsigned short glyphid) const;
      73                 : private:
      74                 :     const Face *m_face;   // GrFace to get the rest of the info from
      75                 : };
      76                 : 
      77                 : 
      78                 : class HintedFont : public Font
      79               0 : {
      80                 : public:
      81                 :     HintedFont(float ppm/*pixels per em*/, const void* appFontHandle/*non-NULL*/, gr_advance_fn advance, const Face *face/*needed for scaling*/);
      82               0 :     virtual bool isHinted() const { return true; }
      83                 : private:
      84                 :     virtual float computeAdvance(unsigned short glyphid) const;
      85                 : 
      86                 : private:
      87                 :     const void* m_appFontHandle/*non-NULL*/;
      88                 :     gr_advance_fn m_advance;
      89                 : };
      90                 : 
      91                 : } // namespace graphite2
      92                 : 
      93                 : struct gr_font : public graphite2::Font {};

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