Re: [ft-devel] new CFF engine

[Dave Arnold]

> > And maybe made configurable from fontconfig like what the Cleartype
> > tuner on Windows 7/8 does.
> Yes, maybe.  However, stem darkening is a font driver property and not
> to be changed font-wise.
>
>
>      Werner
Within the new CFF hinter, stem darkening automatically accounts for font 
weight. At a given size, the darkening amount is greater for light fonts and 
less for bold fonts.

The most important dependency is on linear blending (or gamma correction) in 
the compositing of glyph images onto the screen. The stem darkening function 
assumes blending with a gamma close to 1.8. If linear blending is not used 
(e.g., gamma 1.0) then black text will appear too dark. This might be a 
situation where you'd want to disable stem darkening. But white text would 
suffer. It really is important to use proper blending!

-Dave