Re: [ft-devel] Stem darkening toggling API

[Markus Trippelsdorf]

On 2016.10.27 at 09:19 +0200, Werner LEMBERG wrote:
> 
> > Found the time to do a new revision :)
> > 
> > It comes with FT_Face_Option(...) and puts the stem darkening flag
> > into the internal structure of FT_Face.
> 
> This looks very nice – and very clean, thanks!
> 
> Just to sum up what we currently have to control stem darkening (for
> CFF).  The same essentially holds for all other parameters that
> control FreeType modules.
> 
>   1. A configure-time option (more or less).
> 
>        CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}[1-4]
> 
>   2. A run-time option to globally control stem darkening for all
>      faces.
> 
>        FT_Property_Set( library, "cff",
>                         "no-stem-darkening", &no_stem_darkening );
> 
>   3. An environment option to globally control stem darkening for all
>      faces.
> 
>        FREETYPE_PROPERTIES=cff:no-stem-darkening=1
> 
>      [Note that Chromium – and possibly other browsers also – disable
>       environment handling for FreeType in most situations, making it
>       impossible to select v35 TrueType hinting, for example, if v40
>       is the default.  I consider this an annoying limitation, and I

Setting the environment variable works fine with Firefox.
BTW I've opened a bug to request linear font blending for Firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=1306255
Maybe some of you guys want to chime in?

-- 
Markus