GNU bug report logs - #39799
28.0.50; Most emoji sequences don’t render correctly

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Package: emacs;

Reported by: Mike FABIAN <mfabian <at> redhat.com>

Date: Wed, 26 Feb 2020 14:30:03 UTC

Severity: normal

Found in version 28.0.50

Fixed in version 28.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Robert Pluim <rpluim <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 39799 <at> debbugs.gnu.org, mfabian <at> redhat.com
Subject: bug#39799: 28.0.50; Most emoji sequences don’t render correctly
Date: Fri, 28 Feb 2020 17:24:58 +0100

>>>>> On Fri, 28 Feb 2020 17:44:08 +0200, Eli Zaretskii <eliz <at> gnu.org> said:

    >> From: Robert Pluim <rpluim <at> gmail.com>
    >> Cc: 39799 <at> debbugs.gnu.org,  mfabian <at> redhat.com
    >> Date: Fri, 28 Feb 2020 16:35:17 +0100
    >> 
    Eli> Readability is desirable because the file will be read by humans.
    >> 
    >> Hmm, maybe. I guess we could process it in elisp to replace the
    >> characters with their names, and adding extra newlines is
    >> trivial. What other kind of changes did you have in mind?

    Eli> Just adding newlines, I think.

OK. Iʼll work on that and the required makefile changes.

One thing this has thrown up that I donʼt understand is this:

Most of the emojis in emoji-sequences.txt can be made to use Noto
Color Emoji, but some canʼt. e.g.

#x24c2 Ⓜ

is stubbornly not being displayed using Noto Color Emoji, even though
that font has a glyph for it, and Iʼve added:

     (set-fontset-font "fontset-default" symbol-subgroup
                      '("Noto Color Emoji" . "iso10646-1") nil
                      'prepend)

just after the similar setting for Symbola in
lisp/international/fontset.el

Itʼs not being displayed with the default font, and setting
use-default-font-for-symbols to nil makes no difference. Itʼs using:

    ftcrhb:-GOOG-Noto Sans CJK JP-normal-normal-normal-*-16-*-*-*-*-0-iso10646-1 (#x3F8)

However, if I
eval

     (set-fontset-font nil #x24c2
                      '("Noto Color Emoji" . "iso10646-1") nil
                      'prepend)

in the frame displaying the character, then it does use Noto Color
Emoji. What am I missing?

Robert
This bug report was last modified 3 years and 256 days ago.

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