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Re: [ft-devel] FT_Get_PS_Font_Private in CFF driver


From: Werner LEMBERG
Subject: Re: [ft-devel] FT_Get_PS_Font_Private in CFF driver
Date: Wed, 12 Jun 2013 18:32:23 +0200 (CEST)

> Okay, so in my specific case (CFF) the value is not used.

Yes, it seems that you can just add a dummy value.

> I have been busy with other things, and was about to start making
> the change in the FreeType code that we talked about. But it's a
> little demotivating that the (required!) value is not used anyway...

:-)

> Thanks a lot for forwarding the Adobe communication though.

Ah, this reminds me to rectify one remark:

>> Note that Adobe uses a special, self-made version of the TT
>> interpreter which both handles stem darkening and artificial
>> emboldening *before* hinting takes place.

This was faulty memory of mine: They actually use a special version of
TT interpreter (it's a patched version of the MS interpreter), but
stem darkening and embolding takes place *after* hinting.

The darkening amount, however, needs to be fractional.  The Adobe
people implement this by disabling hints in the x-direction (which is
disabled for the LCD mode anyway), applying darkening only in the
x-direction.


    Werner



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