kc3-lang/ftgl/src/FTTextureGlyph.cpp

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• Hash : 4cd99a38
  Author :
  Date : 2001-07-30T02:24:24
  

  Rewrote the way the raster positon is set. The position is now kept in an FT_Vector called pen and pas into the glyphs, rather than the glyph calculating it's on raster position.

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• src/FTTextureGlyph.cpp

• #include	"gl.h"
  
  #include	"FTTextureGlyph.h"
  #include	"FTGL.h"
  
  
  FTTextureGlyph::FTTextureGlyph( FT_Glyph glyph, int gi, unsigned char* data, int stride, float u, float v)
  :	FTGlyph(gi)
  {
  	if( !glyph->format == ft_glyph_format_bitmap)
  	{ return;}
  	
  	// This function will always fail if the glyph's format isn't scalable????
  	err = FT_Glyph_To_Bitmap( &glyph, ft_render_mode_normal, 0, 1);
  	if( err)
  	{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;
      
  	numGreys = source->num_grays;
  	advance = glyph->advance.x >> 16; // this is 6 in the freetype docs!!!!!!
  
   	pos.x = bitmap->left;
  	pos.y = bitmap->top;
  	
     // FIXME The buffer is upside down. What about dest alignment?
      destWidth = srcWidth;
      destHeight = srcHeight;
      
      for(int y = 0; y < srcHeight; ++y)
      {
      	for(int x = 0; x < srcWidth; ++x)
      	{
  			*( data + ( y * stride  + x)) = *( source->buffer + ( y * srcPitch) + x);
      	}    	
      }
  
  //		0    
  //		+----+
  //		|    |
  //		|    |
  //		|    |
  //		+----+
  //		     1
  	
  	uv[0].x = u;
  	uv[0].y = v;
  	uv[1].x = uv[0].x + ( (float)destWidth / (float)stride);
  	uv[1].y = uv[0].y + ( (float)destHeight / (float)stride);
  
  	// discard glyph image (bitmap or not)
  	// Is this the right place to do this?
  	FT_Done_Glyph( glyph );
  }
  
  
  FTTextureGlyph::~FTTextureGlyph()
  {
  
  }
  
  
  float FTTextureGlyph::Render( FT_Vector& pen)
  {
  //	int adv = advance/* + pos.x */+ ( v.x >> 16); // FIXME ??? pos.x = bearing X
  
  	glTexCoord2f( uv[0].x, uv[0].y); glVertex2f( pen.x,				pen.y + pos.y);
  	glTexCoord2f( uv[1].x, uv[0].y); glVertex2f( pen.x + destWidth,	pen.y + pos.y);
  	glTexCoord2f( uv[1].x, uv[1].y); glVertex2f( pen.x + destWidth,	pen.y + pos.y - destHeight);
  	glTexCoord2f( uv[0].x, uv[1].y); glVertex2f( pen.x,				pen.y + pos.y - destHeight);
  
  	return advance;
  }
  

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