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Re: [ft-devel] [GSoC] CID font support, and others

From: Werner LEMBERG
Subject: Re: [ft-devel] [GSoC] CID font support, and others
Date: Sat, 05 Aug 2017 23:20:11 +0200 (CEST)

[Dave, please comment!]

> Refer to diff.txt.


> Each occurence of "Hints: ..." represents one hint change (with
> OtherSubr 3 or hintmask respectively). Flags are, p=Pair, g=Ghost,
> t=Top, b=Bottom, L=Locked, S=Synthetic.

Maybe it makes sense to mention the abbreviations once in the tracing

> For glyphs that are rendering wrongly, the initial hintmap is
> different in Type 1 and CFF versions of the fonts.

I wouldn't have thought that...

> So, if the initial hintmap is wrong, the DS coordinates will
> generally be wrong.  See glyphs index 126 and 134.  The initial
> dsCoords are wrong, but sometimes after adjustment they are the
> same, more on that.

Dave, how is that handled in Adobe's Type1->CFF converter?  Do you get
similar rendering differences?  Does the old Adobe Type1 engine hint
on the fly, or does it perform two passes, where the first pass builds
a hintmap so that hints are `optimized' for the whole glyph, and the
second pass does the actual hinting?


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