kc3-lang/ftgl/src/FTFont.cpp

Branch : - branch - master - tag -

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  Commit

• Author : sammy
  Date : 2008-03-03 16:36:07
  Hash : f0f550ea
  Message : * Remove svn:executable property from source files.

• 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,const int StartIdx,const int EndIdx,
                    float& llx, float& lly, float& llz, float& urx, float& ury, float& urz) {
      FTBBox totalBBox;
  
      if (String && ('\0' != String[StartIdx])) {
          CheckGlyph(String[StartIdx]);
  
          totalBBox = glyphList->BBox(String[StartIdx]);
          float advance = glyphList->Advance(String[StartIdx],String[StartIdx + 1]);
              
          for (int idx = StartIdx + 1;((EndIdx < 0) && String[idx]) || ((EndIdx >= 0) && (idx <= EndIdx));idx++) {
              CheckGlyph(String[idx]);
              FTBBox tempBBox = glyphList->BBox(String[idx]);
              tempBBox.Move(FTPoint(advance,0.0f,0.0f));
  
              totalBBox += tempBBox;
              advance += glyphList->Advance(String[idx],String[idx + 1]);
          } /* Expand totalBox by each glyph in String (for idx) */
      } /* Only compute the bounds if String is non-empty (if String) */
  
      // TODO: The Z values do not follow the proper ordering.  I'm not sure why.
      llx = totalBBox.lowerX < totalBBox.upperX ? totalBBox.lowerX : totalBBox.upperX;
      lly = totalBBox.lowerY < totalBBox.upperY ? totalBBox.lowerY : totalBBox.upperY;
      llz = totalBBox.lowerZ < totalBBox.upperZ ? totalBBox.lowerZ : totalBBox.upperZ;
      urx = totalBBox.lowerX > totalBBox.upperX ? totalBBox.lowerX : totalBBox.upperX;
      ury = totalBBox.lowerY > totalBBox.upperY ? totalBBox.lowerY : totalBBox.upperY;
      urz = totalBBox.lowerZ > totalBBox.upperZ ? totalBBox.lowerZ : totalBBox.upperZ;
  } /* FTFont::BBox() */
  
  void FTFont::BBox(const wchar_t *String,const int StartIdx,const int EndIdx,
                    float& llx, float& lly, float& llz, float& urx, float& ury, float& urz) {
      FTBBox totalBBox;
  
      if (String && ('\0' != String[StartIdx])) {
          CheckGlyph(String[StartIdx]);
  
          totalBBox = glyphList->BBox(String[StartIdx]);
          float advance = glyphList->Advance(String[StartIdx],String[StartIdx + 1]);
              
          for (int idx = StartIdx + 1;((EndIdx < 0) && String[idx]) || ((EndIdx >= 0) && (idx <= EndIdx));idx++) {
              CheckGlyph(String[idx]);
              FTBBox tempBBox = glyphList->BBox(String[idx]);
              tempBBox.Move(FTPoint(advance,0.0f,0.0f));
  
              totalBBox += tempBBox;
              advance += glyphList->Advance(String[idx],String[idx + 1]);
          } /* Expand totalBox by each glyph in String (for idx) */
      } /* Only compute the bounds if String is non-empty (if String) */
  
      // TODO: The Z values do not follow the proper ordering.  I'm not sure why.
      llx = totalBBox.lowerX < totalBBox.upperX ? totalBBox.lowerX : totalBBox.upperX;
      lly = totalBBox.lowerY < totalBBox.upperY ? totalBBox.lowerY : totalBBox.upperY;
      llz = totalBBox.lowerZ < totalBBox.upperZ ? totalBBox.lowerZ : totalBBox.upperZ;
      urx = totalBBox.lowerX > totalBBox.upperX ? totalBBox.lowerX : totalBBox.upperX;
      ury = totalBBox.lowerY > totalBBox.upperY ? totalBBox.lowerY : totalBBox.upperY;
      urz = totalBBox.lowerZ > totalBBox.upperZ ? totalBBox.lowerZ : totalBBox.upperZ;
  } /* FTFont::BBox() */
  
  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),pen);
          ++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),pen);
          ++c;
      }
  }
  
  
  void FTFont::DoRender( const unsigned int chr, const unsigned int nextChr, FTPoint &origin)
  {
      CheckGlyph( chr);
  
      FTPoint kernAdvance = glyphList->Render( chr, nextChr, origin);
      
      origin.x += kernAdvance.x;
      origin.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);
      }
  }