Re: [ft] anti-aliasing question

[Dave Calkins]

On 2/5/2010 11:50 AM, Tor Andersson wrote:
> On Fri, Feb 5, 2010 at 2:19 PM, Dave Calkins<address@hidden>  wrote:
>    
> > I switched to using the default load flags (as opposed to the "no hinting"
> > flag which was being passed by FreeTypeGL), but this doesn't seem to have
> > made a difference.  The text is still blurry.
> >
> >      
> > > You get less blurrier output if you don't do subpixel position of
> > > glyphs.
> > >
> > >
> > >        
> > How do I control whether or not subpixel positioning of the glyphs occurs?
> >      
> What is the translation component of the transform? If it is non-zero then the
> grid fitting won't help against blurriness (since the pixel-aligned
> outline will then
> be shifted to between pixels, making the rendering all blurry).
>
> -Tor
>
>
>    

Where would the transform be specified?  Are you referring to a 
transform provided to FreeType when it renders the glyphs?

I took a look through the FreeTypeGL source and they're calling 
FT_RenderGlyph and then accessing glyph->bitmap to get the gray-scale 
image and loading this into an OpenGL 2D texture.  This texture is used 
as the alpha channel to render a rectangle to the screen of the desired 
color.

I'm not certain which transform you're referring to though.