kc3-lang/ftgl/src/FTFont.cpp

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• Hash : 789b1cf3
  Author :
  Date : 2001-11-04T04:33:30
  

  Changes to allow glyphs to be loaded on the fly... MakeGlyphList is no longer pure virtual. New function MakeGlyph is pure virtual Open now has a flag for pre-cache GlyphContainer builds a list of null pointers advance and render functions check if glyph has been loaded and loads it if it has'nt

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• src/FTFont.cpp

• #include	"FTFace.h"
  #include	"FTFont.h"
  #include	"FTGlyphContainer.h"
  #include	"FTGL.h"
  
  
  FTFont::FTFont()
  :	numFaces(0),
  	glyphList(0),
  	numGlyphs(0),
  	preCache(true),
  	err(0)
  {
  	pen.x = 0;
  	pen.y = 0;
  }
  
  
  FTFont::~FTFont()
  {
  	Close();
  }
  
  
  bool FTFont::Open( const char* fontname, bool p)
  {
  	preCache = p;
  	
  	if( face.Open( fontname))
  	{
  		FT_Face* ftFace = face.Face();		
  		numGlyphs = (*ftFace)->num_glyphs;
  		
  		return true;
  	}
  	else
  	{
  		err = face.Error();
  		return false;
  	}
  }
  
  
  void FTFont::Close()
  {
  	delete glyphList;
  }
  
  
  bool FTFont::FaceSize( const unsigned int size, const unsigned int res )
  {
  	charSize = face.Size( size, res);
  
  	if( glyphList)
  		delete glyphList;
  	
  	glyphList = new FTGlyphContainer( &face, numGlyphs, preCache);
  	
  	if( MakeGlyphList())
  	{
  		return true;
  	}
  	else
  	{
  		return false;
  	}
  }
  
  
  bool FTFont::MakeGlyphList()
  {
  	for( unsigned int c = 0; c < numGlyphs; ++c)
  	{
  		if( preCache)
  		{
  			glyphList->Add( MakeGlyph( c), c);
  		}
  		else
  		{
  			glyphList->Add( NULL, c);
  		}
  	}
  	
  	return !err;
  }
  
  
  bool FTFont::CharMap( FT_Encoding encoding)
  {
  	err = face.CharMap( encoding);
  	return !err;
  }
  
  
  int	FTFont::Ascender() const
  {
  	return charSize.Ascender();
  }
  
  
  int	FTFont::Descender() const
  {
  	return charSize.Descender();
  }
  
  
  float FTFont::Advance( const wchar_t* string)
  {
  	const wchar_t* c = string; // wchar_t IS unsigned?
  	float width = 0;
  
  	while( *c)
  	{
  		if( !glyphList->Glyph( static_cast<unsigned int>(*c)))
  		{
  			unsigned int g = face.CharIndex( static_cast<unsigned int>(*c));
  			glyphList->Add( MakeGlyph( g), g);
  		}
  
  		width += glyphList->Advance( *c, *(c + 1));	
  		++c;
  	}
  
  	return width;
  }
  
  
  float FTFont::Advance( const char* string)
  {
  	const unsigned char* c = (unsigned char*)string; // This is ugly, what is the c++ way?
  	float width = 0;
  
  	while( *c)
  	{
  		if( !glyphList->Glyph( static_cast<unsigned int>(*c)))
  		{
  			unsigned int g = face.CharIndex( static_cast<unsigned int>(*c));
  			glyphList->Add( MakeGlyph( g), g);
  		}
  
  		width += glyphList->Advance( *c, *(c + 1));
  		++c;
  	}
  
  	return width;
  }
  
  
  void FTFont::render( const char* string )
  {
  	const unsigned char* c = (unsigned char*)string; // This is ugly, what is the c++ way?
  	FT_Vector kernAdvance;
  	pen.x = 0; pen.y = 0;
  
  	while( *c)
  	{
  		if( !glyphList->Glyph( static_cast<unsigned int>(*c)))
  		{
  			unsigned int g = face.CharIndex( static_cast<unsigned int>(*c));
  			glyphList->Add( MakeGlyph( g), g);
  		}
  
  		kernAdvance = glyphList->render( *c, *(c + 1), pen);
  		
  		pen.x += kernAdvance.x;
  		pen.y += kernAdvance.y;
  		++c;
  	}
  }
  
  
  void FTFont::render( const wchar_t* string )
  {
  	const wchar_t* c = string; // wchar_t IS unsigned?
  	FT_Vector kernAdvance;
  	pen.x = 0; pen.y = 0;
  
  	while( *c)
  	{
  		if( !glyphList->Glyph( static_cast<unsigned int>(*c)))
  		{
  			unsigned int g = face.CharIndex( static_cast<unsigned int>(*c));
  			glyphList->Add( MakeGlyph( g), g);
  		}
  
  		kernAdvance = glyphList->render( *c, *(c + 1), pen);
  		
  		pen.x += kernAdvance.x;
  		pen.y += kernAdvance.y;
  		++c;
  	}
  }
  

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