GASP table adjustment about dehinter HOT 6 CLOSED

Thanks for the report!

I don't recall the approach here off the top of my head but I attempted to RE ttfautohint -d and may well have missed some parts of the dehinting approach. Do you know how ttfa -d handles it?

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It appears that ttfautohint -d modifies the GASP table to match what your code does. However, I suspect that this not because it is making an intelligent decision about what is best for an unhinted font, and instead because it always sets the GASP table when tthautohint runs.

In the ttfautohint code, I found:

The font's `gasp`
 *     table is set up to always use grayscale rendering with grid-fitting
 *     for standard hinting, and symmetric grid-fitting and symmetric
 *     smoothing for horizontal subpixel hinting (ClearType).

I could not find any references anywhere to GASP table modifications in relation to dehinting.

In a discussion that I had with Mike Duggan a year or so ago, "when not hinting, we want the GASP set to use full ysmoothing and no hinting." Given that, I think that you probably only want bit 2 and 4, thus disabling any gridfit.

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Agree! Let's do the right thing. Interested in submitting a PR?

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Done!

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Ty! I'll update the CI tests and get this merged. Much appreciated!!

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changes merged to the master branch and will be released in dehinter v2.0.0

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