On Thu, Aug 27, 2015 at 4:45 PM, Dave Arnold <darn...@adobe.com> wrote:
>>
>> I'd propose a single value from 0 to 1 (or maybe 0 to 100) that would
>> linearly scale y1, y2 and y3 together, between zero and the default.  I
>> would make x1, x2, x3, x4 and y4 constant.
>
> But we are now constrained by compatibility.
>
> By the way, the current default (Adobe and FreeType) for CFF can be
> expressed as 400,275,275 (y1,y2,y3).
> For comparison, the reduced darkening for TT (in Adobe's product) is
> 300,250,250.

It boils down to just two important values: one for vanishing stems
below 0.5 pixels, one for about 1.5-pixel stems. I wish we had only
two values in the config file.

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