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Re: [ft] Large delta_y for hinted vs unhinted "COMBINING CARON BELOW" gl


From: Werner LEMBERG
Subject: Re: [ft] Large delta_y for hinted vs unhinted "COMBINING CARON BELOW" glyph
Date: Thu, 31 Oct 2013 01:31:21 +0100 (CET)

> Ah, I was mislead because the SRP0 instruction sets RP0 to point to
> point number 10, which is the 4th phantom point (the caron has 7
> points), and the 4th phantom point's Y co-ordinate is:
> 
> (loader)->top_bearing + (loader)->bbox.yMax - (loader)->vadvance.
> 
> I guessed that the top_bearing and vadvance were calculated
> incorrectly if the vmtx table wasn't present,

Yes, I suspect that.

> but on second thoughts, the more plausible hypothesis is that the
> phantom point used for hinting the outer glyph (#733) is
> (incorrectly??) not reset from the phantom point used for the inner
> component (#649).

This will be the next thing after checking my first suspicion.


    Werner



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