I'm a giant dunce. I forgot to convert character space to device
space... No wonder FT_Outline_Embolden produced garbage, especially at
small sizes. Emboldening looks good now with the default CFF parameters
without any tweaking!
http://postimg.org/gallery/vgi21eka (all with gamma correction, ftview
left-to-right: no hinting, autohinter without emboldening, autohinter
with emboldening)
I think this is it :)
Pushed to https://github.com/madig/freetype2/tree/stem-darkening-autohinter.
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