kc3-lang/ftgl/src/FTGlyphContainer.cpp

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• Author : sammy
  Date : 2010-05-23 20:46:45
  Hash : 4c82e100
  Message : Fix improper bound checks in FTGlyphContainer.

• src/FTGlyphContainer.cpp

• /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   * Copyright (c) 2008 Sam Hocevar <sam@hocevar.net>
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #include "config.h"
  
  #include "FTGL/ftgl.h"
  
  #include "FTGlyphContainer.h"
  #include "FTFace.h"
  #include "FTCharmap.h"
  
  
  FTGlyphContainer::FTGlyphContainer(FTFace* f)
  :   face(f),
      err(0)
  {
      glyphs.push_back(NULL);
      charMap = new FTCharmap(face);
  }
  
  
  FTGlyphContainer::~FTGlyphContainer()
  {
      GlyphVector::iterator it;
      for(it = glyphs.begin(); it != glyphs.end(); ++it)
      {
          delete *it;
      }
  
      glyphs.clear();
      delete charMap;
  }
  
  
  bool FTGlyphContainer::CharMap(FT_Encoding encoding)
  {
      bool result = charMap->CharMap(encoding);
      err = charMap->Error();
      return result;
  }
  
  
  unsigned int FTGlyphContainer::FontIndex(const unsigned int charCode) const
  {
      return charMap->FontIndex(charCode);
  }
  
  
  void FTGlyphContainer::Add(FTGlyph* tempGlyph, const unsigned int charCode)
  {
      charMap->InsertIndex(charCode, glyphs.size());
      glyphs.push_back(tempGlyph);
  }
  
  
  const FTGlyph* const FTGlyphContainer::Glyph(const unsigned int charCode) const
  {
      unsigned int index = charMap->GlyphListIndex(charCode);
  
      return (index < glyphs.size()) ? glyphs[index] : NULL;
  }
  
  
  FTBBox FTGlyphContainer::BBox(const unsigned int charCode) const
  {
      return Glyph(charCode)->BBox();
  }
  
  
  float FTGlyphContainer::Advance(const unsigned int charCode,
                                  const unsigned int nextCharCode)
  {
      unsigned int left = charMap->FontIndex(charCode);
      unsigned int right = charMap->FontIndex(nextCharCode);
      const FTGlyph *glyph = Glyph(charCode);
  
      if (!glyph)
        return 0.0f;
  
      return face->KernAdvance(left, right).Xf() + glyph->Advance();
  }
  
  
  FTPoint FTGlyphContainer::Render(const unsigned int charCode,
                                   const unsigned int nextCharCode,
                                   FTPoint penPosition, int renderMode)
  {
      unsigned int left = charMap->FontIndex(charCode);
      unsigned int right = charMap->FontIndex(nextCharCode);
  
      FTPoint kernAdvance = face->KernAdvance(left, right);
  
      if(!face->Error())
      {
          unsigned int index = charMap->GlyphListIndex(charCode);
          if (index < glyphs.size())
              kernAdvance += glyphs[index]->Render(penPosition, renderMode);
      }
  
      return kernAdvance;
  }