kc3-lang/ftgl/src/FTFace.cpp

Branch : - branch - master - tag -

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  Commit

• Author : henry
  Date : 2002-12-01 07:52:12
  Hash : 57ca18fb
  Message : Better error handling

• src/FTFace.cpp

• #include    "FTFace.h"
  #include    "FTLibrary.h"
  #include    "FTCharmap.h"
  
  
  FTFace::FTFace()
  :   charMap(0),
      ftFace(0),
      numCharMaps(0),
      numGlyphs(0),
      err(0)
  {}
  
  
  FTFace::~FTFace()
  {
      delete charMap;
      Close();
  }
  
  
  bool FTFace::Open( const char* filename)
  {
      const FT_Long DEFAULT_FACE_INDEX = 0;
      ftFace = new FT_Face;
      
      // FIXME check library for errors
      err = FT_New_Face( *FTLibrary::Instance().GetLibrary(), filename, DEFAULT_FACE_INDEX, ftFace);
  
      if( err)
      {
          delete ftFace;
          ftFace = 0;
          return false;
      }
      else
      {
          charMap = new FTCharmap( *ftFace);
          return true;
      }
  }
  
  
  bool FTFace::Open( const unsigned char *pBufferBytes, size_t bufferSizeInBytes )
  {
      const FT_Long DEFAULT_FACE_INDEX = 0;
      ftFace = new FT_Face;
  
      // FIXME check library for errors
      err = FT_New_Memory_Face( *FTLibrary::Instance().GetLibrary(), (FT_Byte *)pBufferBytes, bufferSizeInBytes, DEFAULT_FACE_INDEX, ftFace);
  
      if( err)
      {
          delete ftFace;
          ftFace = 0;
          return false;
      }
      else
      {
          charMap = new FTCharmap( *ftFace);
          return true;
      }
  }
  
  
  bool FTFace::Attach( const char* filename)
  {
      err = FT_Attach_File( *ftFace, filename);
      return !err;
  }
  
  
  void FTFace::Close()
  {
      if( ftFace)
      {
          FT_Done_Face( *ftFace);
          delete ftFace;
          ftFace = 0;
      }
  }
  
  
  FTSize& FTFace::Size( const unsigned int size, const unsigned int res)
  {
      charSize.CharSize( ftFace, size, res, res);
      err = charSize.Error();
  
      return charSize;
  }
  
  
  bool FTFace::CharMap( FT_Encoding encoding)
  {
      bool result = charMap->CharMap( encoding);
      err = charMap->Error();
      return result;
  }
  
  
  unsigned int FTFace::CharIndex( unsigned int index) const
  {
      return charMap->CharIndex( index);
  }
  
  
  FTPoint FTFace::KernAdvance( unsigned int index1, unsigned int index2)
  {
      FT_Vector kernAdvance;
      kernAdvance.x = 0;
      kernAdvance.y = 0;
      
      if( FT_HAS_KERNING((*ftFace)) && index1 && index2)
      {
          err = FT_Get_Kerning( *ftFace, index1, index2, ft_kerning_unfitted, &kernAdvance);
          if( !err)
          {   
              kernAdvance.x /= 64;
              kernAdvance.y /= 64;
          }
      }
      
      return FTPoint( kernAdvance);
  }
  
  
  FT_Glyph* FTFace::Glyph( unsigned int index, FT_Int load_flags)
  {
      err = FT_Load_Glyph( *ftFace, index, load_flags);   
      err = FT_Get_Glyph( (*ftFace)->glyph, &ftGlyph);
          
      if( !err)
      {
          return &ftGlyph;
      }
      else
      {
          return NULL;
      }
  }