kc3-lang/ftgl/src/FTFont.cpp

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• Hash : 84ab33fd
  Author :
  Date : 2003-02-27T22:28:18
  

  Fixed null string bug in BBox
  
  

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• src/FTFont.cpp

• #include    "FTFace.h"
  #include    "FTFont.h"
  #include    "FTGlyphContainer.h"
  #include    "FTBBox.h"
  
  
  FTFont::FTFont( const char* fontname)
  :   face( fontname),
      glyphList(0)
  {
      err = face.Error();
  }
  
  
  FTFont::FTFont( const unsigned char *pBufferBytes, size_t bufferSizeInBytes)
  :   face( pBufferBytes, bufferSizeInBytes),
      glyphList(0)
  {
      err = face.Error();
  }
  
  
  FTFont::~FTFont()
  {
      delete glyphList;
  }
  
  
  bool FTFont::Attach( const char* filename)
  {
      if( face.Attach( filename))
      {
          err = 0;
          return true;
      }
      else
      {
          err = face.Error();
          return false;
      }
  }
  
  
  bool FTFont::Attach( const unsigned char *pBufferBytes, size_t bufferSizeInBytes)
  {
      if( face.Attach( pBufferBytes, bufferSizeInBytes))
      {
          err = 0;
          return true;
      }
      else
      {
          err = face.Error();
          return false;
      }
  }
  
  
  bool FTFont::FaceSize( const unsigned int size, const unsigned int res )
  {
      charSize = face.Size( size, res);
      
      if( face.Error())
      {
          return false;
      }
      
      if( glyphList)
      {
          delete glyphList;
      }
      
      glyphList = new FTGlyphContainer( &face);
      return true;
  }
  
  
  unsigned int FTFont::FaceSize() const
  {
      return charSize.CharSize();
  }
  
  
  bool FTFont::CharMap( FT_Encoding encoding)
  {
      bool result = face.CharMap( encoding);
      err = face.Error();
      return result;
  }
  
  
  float FTFont::Ascender() const
  {
      return charSize.Ascender();
  }
  
  
  float FTFont::Descender() const
  {
      return charSize.Descender();
  }
  
  
  void FTFont::BBox( const char* string,
                     float& llx, float& lly, float& llz, float& urx, float& ury, float& urz)
  {
      FTBBox totalBBox;
  
      if((NULL != string) && ('\0' != *string))
      {
          const unsigned char* c = (unsigned char*)string;
  
          CheckGlyph( *c);
  
          totalBBox = glyphList->BBox( *c);
          float advance = glyphList->Advance( *c, *(c + 1));
          ++c;
              
          while( *c)
          {
              CheckGlyph( *c);
              FTBBox tempBBox = glyphList->BBox( *c);
              tempBBox.Move( FTPoint( advance, 0.0f, 0.0f));
              totalBBox += tempBBox;
              advance += glyphList->Advance( *c, *(c + 1));
              ++c;
          }
      }
  
      llx = totalBBox.lowerX;
      lly = totalBBox.lowerY;
      llz = totalBBox.lowerZ;
      urx = totalBBox.upperX;
      ury = totalBBox.upperY;
      urz = totalBBox.upperZ;
  }
  
  
  void FTFont::BBox( const wchar_t* string,
                     float& llx, float& lly, float& llz, float& urx, float& ury, float& urz)
  {
      FTBBox totalBBox;
  
      if((NULL != string) && ('\0' != *string))
      {
          const wchar_t* c = string;
  
          CheckGlyph( *c);
  
          totalBBox = glyphList->BBox( *c);
          float advance = glyphList->Advance( *c, *(c + 1));
          ++c;
  
          while( *c)
          {
              CheckGlyph( *c);
              FTBBox tempBBox = glyphList->BBox( *c);
              tempBBox.Move( FTPoint( advance, 0.0f, 0.0f));
              totalBBox += tempBBox;
              advance += glyphList->Advance( *c, *(c + 1));
              ++c;
          }
      }
  
      llx = totalBBox.lowerX;
      lly = totalBBox.lowerY;
      llz = totalBBox.lowerZ;
      urx = totalBBox.upperX;
      ury = totalBBox.upperY;
      urz = totalBBox.upperZ;
  }
  
  
  float FTFont::Advance( const wchar_t* string)
  {
      const wchar_t* c = string;
      float width = 0.0f;
  
      while( *c)
      {
          CheckGlyph( *c);
          width += glyphList->Advance( *c, *(c + 1));
          ++c;
      }
  
      return width;
  }
  
  
  float FTFont::Advance( const char* string)
  {
      const unsigned char* c = (unsigned char*)string;
      float width = 0.0f;
  
      while( *c)
      {
          CheckGlyph( *c);
          width += glyphList->Advance( *c, *(c + 1));
          ++c;
      }
      
      return width;
  }
  
  
  void FTFont::Render( const char* string )
  {
      const unsigned char* c = (unsigned char*)string;
      pen.x = 0; pen.y = 0;
  
      while( *c)
      {
          DoRender( *c, *(c + 1));
          ++c;
      }
  }
  
  
  void FTFont::Render( const wchar_t* string )
  {
      const wchar_t* c = string;
      pen.x = 0; pen.y = 0;
  
      while( *c)
      {
          DoRender( *c, *(c + 1));
          ++c;
      }
  }
  
  
  void FTFont::DoRender( const unsigned int chr, const unsigned int nextChr)
  {
      CheckGlyph( chr);
  
      FTPoint kernAdvance = glyphList->Render( chr, nextChr, pen);
      
      pen.x += kernAdvance.x;
      pen.y += kernAdvance.y;
  }
  
  
  void FTFont::CheckGlyph( const unsigned int chr)
  {
      if( !glyphList->Glyph( chr))
      {
          unsigned int g = face.CharIndex( chr);
          glyphList->Add( MakeGlyph( g), g);
      }
  }
  
  

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