kc3-lang/ftgl/src/FTGLTextureFont.cpp

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• Hash : 019af0d2
  Author :
  Date : 2001-07-26T05:11:34
  

  This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches.

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• src/FTGLTextureFont.cpp

• #include	"gl.h"
  
  #include	"FTGLTextureFont.h"
  #include	"FTGlyphContainer.h"
  #include	"FTGL.h"
  
  
  inline UInt32 NextPowerOf2( UInt32 in)
  {
       in -= 1;
  
       in |= in >> 16;
       in |= in >> 8;
       in |= in >> 4;
       in |= in >> 2;
       in |= in >> 1;
  
       return in + 1;
  }
  
  
  FTGLTextureFont::FTGLTextureFont()
  :	glTextureID(0),
  	textMem(0)
  {
  	glGetIntegerv( GL_MAX_TEXTURE_SIZE, &maxTextSize);
  	glGenTextures( 1, &glTextureID);
  
  }
  
  
  FTGLTextureFont::~FTGLTextureFont()
  {
  	glDeleteTextures( 1, &glTextureID);
  	delete [] texMem;
  }
  
  
  bool FTGLTextureFont::CreateTexture()
  {
  	// calc the area required for this font
  	int glyphHeight = ftFace->size->metrics-> + padding;
  	int glyphWidth = ftFace->size->metrics-> + padding;
  	
  	// calc the smallest texture size to fit the glyphs
  	// this is bit naff!!
  	for(int s = 64; s < maxTextSize; s = s * s)
  	{
  		int size = s -padding - padding;
  		horizGlyphs = static_cast<int>( size / glyphWidth);
  		
  		vertGlyphs = static_cast<int>( numGlyphs / horizGlyphs);
  		
  		if( vertGlyphs * glyphHeight < size)
  			break;
  	}
  
  	vertGlyphs = static_cast<int>( ( textureSize - padding) / glyphHeight);
  	horizGlyphs = static_cast<int>( ( textureSize - padding) / glyphWidth);
  	
  	// build the texture.
  	textMem = unsigned char[ s * s]; // GL_ALPHA texture;
  }
  
  
  bool FTGLTextureFont::MakeGlyphList()
  {
  	FT_Face* ftFace = face.Face();
  	
  	CreateTexture();
  
  	int currentTextX = padding;
  	int currentTextY = padding;
  	
  	currGlyph = 0;
  	
  	for( int y = 0; y < horizGlyphs; ++y)
  	{
  		for( int x = 0; x < vertGlyphs; ++x)
  		{
  
  		}
  	}
  }
  
  
  
  
  
  
  

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