Re: [ft-devel] Autohinter: stem darkening, first rough prototype

[Dave Arnold]

Hi Nikolaus,

I used a zoom-in tool to examine the pixels in your before and after screen 
shots. The left sides of the stems were unchanged while the right sides were 
darker.

Alexei has explained how this is the result of using the existing emboldener. I 
don't think it is a problem. It only caught my eye because the CFF stem 
darkener, which works on the outline, applies darkening to both sides. If we 
took the approach of darkening TT outlines before applying the autohinter, I'd 
expect the same: darkening on both sides.

As for subpixel rendering, that's to be expected. For vertical LCD stripes, it 
should sharpen vertical stems.

Thanks.

-Dave

On 9/9/2015 2:12 AM, Nikolaus Waxweiler wrote:
> > Question: I see the extra weight is applied only to the right hand side
> > of the vstems. Is this because of the way the emboldening function
> > works? Have you noticed any issues with the sub-pixel translation that
> > this causes? (I don't think so, and they are unhinted anyway)
>
> How did you see that? I'm currently using 300,250,250 because the default 
> parameters seemed unbalanced but I still think *something* is off. I have no 
> idea though if this has to with the emboldening function or my mind playing 
> tricks on me. I also noticed that without subpixel rendering, glyphs look a tad 
> smudgy. That may be relevant for distros that refuse to ship subpixel rendering 
> by default.
>
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