kc3-lang/ftgl/src/FTBitmapGlyph.cpp

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• Hash : 3a0d7bf5
  Author :
  Date : 2002-01-09T20:54:12
  

  Added a check for zero dimension bitmaps

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• src/FTBitmapGlyph.cpp

• #include	"FTBitmapGlyph.h"
  #ifdef FTGL_DEBUG
  	#include "mmgr.h"
  #endif
  
  
  FTBitmapGlyph::FTBitmapGlyph( FT_Glyph glyph)
  :	FTGlyph(),
  	destWidth(0),
  	destHeight(0),
  	data(0)
  {
  	// This function will always fail if the glyph's format isn't scalable????
  	FT_Error err = FT_Glyph_To_Bitmap( &glyph, ft_render_mode_mono, 0, 1);
  	if( err || ft_glyph_format_bitmap != glyph->format)
  	{return;}
  
  	FT_BitmapGlyph  bitmap = (FT_BitmapGlyph)glyph;
  	FT_Bitmap*      source = &bitmap->bitmap;
  
  	//check the pixel mode
  	//ft_pixel_mode_grays
  	    
  	int srcWidth = source->width;
  	int srcHeight = source->rows;
  	int srcPitch = source->pitch;
      
     // FIXME What about dest alignment?
      destWidth = srcWidth;
      destHeight = srcHeight;
      
  	if( destWidth && destHeight)
      {
  		data = new unsigned char[srcPitch * destHeight];
  	    
  	    for(int y = 0; y < srcHeight; ++y)
  	    {
  	    	--destHeight;
  	    	for(int x = 0; x < srcPitch; ++x)
  	    	{
  				*( data + ( destHeight * srcPitch + x)) = *( source->buffer + ( y * srcPitch) + x);
  	    	}    	
  	    }
  
  	    destHeight = srcHeight;
  	}
  	
  	bBox = FTBBox( glyph);
  	advance = static_cast<float>(glyph->advance.x >> 16);
   	pos.x = bitmap->left;
  	pos.y = srcHeight - bitmap->top;
  	
  	// discard glyph image (bitmap or not)
  	// Is this the right place to do this?
  	FT_Done_Glyph( glyph );
  }
  
  
  FTBitmapGlyph::~FTBitmapGlyph()
  {
  	if( data)
  		delete [] data;
  }
  
  
  float FTBitmapGlyph::Render( const FT_Vector& pen)
  {
  	if( data)
  	{
  		// Move the glyph origin
  		glBitmap( 0, 0, 0.0, 0.0, pen.x + pos.x, pen.y - pos.y, (const GLubyte *)0 );
  
  		glBitmap( destWidth, destHeight, 0.0f, 0.0, 0.0, 0.0, (const GLubyte *)data);
  
  		// Restore the glyph origin
  		glBitmap( 0, 0, 0.0, 0.0, -pen.x - pos.x, -pen.y + pos.y, (const GLubyte *)0 );
  	}
  	
  	return advance;
  }
  

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