bug#39340: 26.3; "Noto Emoji" font not displayed

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: 39340@debbugs.gnu.org,  ynyaaa@gmail.com
> Date: Mon, 03 Feb 2020 19:03:12 +0100
> 
> font-log with the attached patch applied is below. Basically
> fontp->driver->has_char and fontp->driver->encode_char are both
> failing for Ebrima when uniscribe is used. When harfbuzz is used, only
> has_char fails, but encode_char succeeds (see second attachment)

has_char always fails in w32 font backends, so that's expected.
encode_char is the problem.  Can you tell where in
uniscribe_encode_char do we fail? does ScriptItemize fail or is it
ScriptShape?

This could be a symptom of Microsoft deprecating Uniscribe.

Thanks.