kc3-lang/ftgl/src/FTSize.cpp

Branch : - branch - master - tag -

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  Commit

• Author : henry
  Date : 2004-12-12 10:01:50
  Hash : 5760ea26
  Message : Changed behaviour so that if an errror occurs the object isn't modified. (strong guarantee).

• src/FTSize.cpp

• #include    "FTSize.h"
  
  
  FTSize::FTSize()
  :   ftFace(0),
      ftSize(0),
      size(0),
      xResolution(0),
      yResolution(0),
      err(0)
  {}
  
  
  FTSize::~FTSize()
  {}
  
  
  bool FTSize::CharSize( FT_Face* face, unsigned int pointSize, unsigned int xRes, unsigned int yRes )
  {
      if( size != pointSize || xResolution != xRes || yResolution != yRes)
      {
          err = FT_Set_Char_Size( *face, 0L, pointSize * 64, xResolution, yResolution);
  
          if( !err)
          {
              ftFace = face;
              size = pointSize;
              xResolution = xRes;
              yResolution = yRes;
              ftSize = (*ftFace)->size;
          }
      }
      
      return !err;
  }
  
  
  unsigned int FTSize::CharSize() const
  {
      return size;
  }
  
  
  float FTSize::Ascender() const
  {
      return ftSize == 0 ? 0.0f : static_cast<float>( ftSize->metrics.ascender) / 64.0f;
  }
  
  
  float FTSize::Descender() const
  {
      return ftSize == 0 ? 0.0f : static_cast<float>( ftSize->metrics.descender) / 64.0f;
  }
  
  
  float FTSize::Height() const
  {
      if( 0 == ftSize)
      {
          return 0.0f;
      }
      
      if( FT_IS_SCALABLE((*ftFace)))
      {
          return ( (*ftFace)->bbox.yMax - (*ftFace)->bbox.yMin) * ( (float)ftSize->metrics.y_ppem / (float)(*ftFace)->units_per_EM);
      }
      else
      {
          return static_cast<float>( ftSize->metrics.height) / 64.0f;
      }
  }
  
  
  float FTSize::Width() const
  {
      if( 0 == ftSize)
      {
          return 0.0f;
      }
      
      if( FT_IS_SCALABLE((*ftFace)))
      {
          return ( (*ftFace)->bbox.xMax - (*ftFace)->bbox.xMin) * ( static_cast<float>(ftSize->metrics.x_ppem) / static_cast<float>((*ftFace)->units_per_EM));
      }
      else
      {
          return static_cast<float>( ftSize->metrics.max_advance) / 64.0f;
      }
  }
  
  
  float FTSize::Underline() const
  {
      return 0.0f;
  }