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: Mike FABIAN <mfabian <at> redhat.com>
To: Robert Pluim <rpluim <at> gmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 39799 <at> debbugs.gnu.org
Subject: bug#39799: 28.0.50; Most emoji sequences don’t render correctly
Date: Fri, 28 Feb 2020 18:55:24 +0100
[Message part 1 (text/plain, inline)]
Mike FABIAN <mfabian <at> redhat.com> さんはかきました:

> U+24C2 is an Emoji which has both a text and an emoji presentation. See:

Surprisingly, even some ASCII characters are emoji and have a text and
an emoji representation. For example # U+0023:

$ grep 0023 emoji-data.txt 
0023          ; Emoji                # E0.0   [1] (#️)       number sign
0023          ; Emoji_Component      # E0.0   [1] (#️)       number sign
$

Is listed as an Emoji but does not have Emoji_Presentation tag, so
it should usually be displayed as text when not followed by a variation
selector.

$ grep 0023 emoji-variation-sequences.txt 
0023 FE0E  ; text style;  # (1.1) NUMBER SIGN
0023 FE0F  ; emoji style; # (1.1) NUMBER SIGN

When testing this in gedit,


U+23 displays as text using the “DejaVu Sans” font.
U+23 U+FE0E displays as text using the “DejaVu Sans” font.
U+23 U+FE0F displays as an emoji using the “Noto Color Emoji” Font. 

With the “Noto Color Emoji” font this is not very obvious as the glyph
for # in that font looks quite similar to the text version. 

My “emoji-picker” tool displays it the same way as gedit as it also uses
pango, see the 3 attached screenshot showing how it looks like in
DejaVu Sans, Noto Color Emoji, and Joypixels.

-- 
Mike FABIAN <mfabian <at> redhat.com>

[hash-shown-as-emoji-with-joypixels-font.png (image/png, attachment)]
[hash-shown-as-emoji-with-noto-color-emoji-font.png (image/png, attachment)]
[hash-shown-as-text-with-dejavu-sans-font.png (image/png, attachment)]

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

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