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bug#33729: 27.0.50; Partial glyphs not rendered for Gujarati with Harfbu


From: Eli Zaretskii
Subject: bug#33729: 27.0.50; Partial glyphs not rendered for Gujarati with Harfbuzz enabled (renders fine using m17n)
Date: Sun, 06 Jan 2019 19:54:24 +0200

> Date: Sat, 5 Jan 2019 23:04:20 +0200
> From: Khaled Hosny <address@hidden>
> Cc: address@hidden, address@hidden, address@hidden
> 
> I pushed a couple of commits that does this based on my limited
> understanding of Emacs code, please check.

Can you explain why you moved the call to
hb_buffer_guess_segment_properties _after_ the code which sets some of
the properties?  I cannot find anything about that in the HarfBuzz
documentation.  Is this because guessing the unset properties can
benefit from knowing the properties which _are_ set, such as the
direction?

I did it the other way around, because my mental model was: first set
the defaults, then override them where better info is available.

Thanks.





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