Subject: bug#39554: 27.0.50; cairo not composing sequences

From: James Cloos <[email-masked]>
Date: Fri, 11 Feb 2022 15:40:19 -0500

>>>>> "RP" == Robert Pluim <[email-masked]> writes:
>>>>> "LI" == Lars Ingebrigtsen <[email-masked]> writes:

RP>> I donʼt see the issue with DejaVu Sans Mono in an Xft build, and can
RP>> reproduce it in an Xft+Harfbuzz build, so Cairo is not to blame here.

LI> in that case Emacs doesn't combine chars.  So it's a
LI> matter of choosing a font that has wider coverage, I think.

no.

in this case one font is used.

w/ m17lib+libotf the two glyphs are combined and displayed one atop the other
(ie, z-axis stacking).

w/ harfbuzz the two glyphs still are combined but displayed next to each other.
(ie, x-axis stacking).

the first way is the correct way.  the latter is a bug.

-JimC
-- 
James Cloos <[email-masked]>         OpenPGP: 0x997A9F17ED7DAEA6