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bug#39799: 28.0.50; Most emoji sequences don’t render correctly
From: |
Mike FABIAN |
Subject: |
bug#39799: 28.0.50; Most emoji sequences don’t render correctly |
Date: |
Fri, 28 Feb 2020 18:30:12 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Robert Pluim <rpluim@gmail.com> さんはかきました:
> 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
U+24C2 is an Emoji which has both a text and an emoji presentation. See:
http://unicode.org/reports/tr51/#Emoji_Variation_Selector_Notes
http://unicode.org/reports/tr51/#def_fully_qualified_emoji_zwj_sequence
http://unicode.org/reports/tr51/#def_non_fully_qualified_emoji_zwj_sequence
http://www.unicode.org/Public/emoji/12.0/emoji-data.txt
U+1F600 is an emoji, which has only emoji representation:
$ grep 1F600 emoji-data.txt
1F600 ; Emoji # E1.0 [1] (😀) grinning face
1F600 ; Emoji_Presentation # E1.0 [1] (😀) grinning face
1F600 ; Extended_Pictographic# E1.0 [1] (😀) grinning face
It displays without problems in colour in my Emacs.
Note that U+24C2 does not have the "Emoji_Presentation" tag:
$ grep 24C2 emoji-data.txt
24C2 ; Emoji # E0.6 [1] (Ⓜ️) circled M
24C2 ; Extended_Pictographic# E0.6 [1] (Ⓜ️) circled M
It has to variations, text representation and emoji representation:
$ grep 24C2 emoji-variation-sequences.txt
24C2 FE0E ; text style; # (1.1) CIRCLED LATIN CAPITAL LETTER M
24C2 FE0F ; emoji style; # (1.1) CIRCLED LATIN CAPITAL LETTER M
(U+1F600 is not in emoji-variation-sequences.txt as it has only emoji
representation).
$ grep 1F600 emoji-test.txt
1F600 ; fully-qualified # 😀 E1.0
grinning face
$ grep 24C2 emoji-test.txt
24C2 FE0F ; fully-qualified # Ⓜ️ E0.6
circled M
24C2 ; unqualified # Ⓜ E0.6
circled M
$
As you can see above, U+1F600 is already fully-qualified on its own.
If I test in gedit, U+24C2 on its own is displayed in black and white
(happens to use "MS Gothic" font on my system).
U+24C2 U+FE0E is displayed in black and white in gedit as well.
U+24C2 U+FE0F is displayed in colour in gedit using the "Noto Color
Emoji" font.
These selectors don’t work in Emacs for me. U+24C2, U+24C2 U+FE0E, and
U+24C2 U+FE0F *all* display in black and white for me in Emacs.
The selectors are displayed as a narrow box.
The presence of such selectors in a currently visible buffer make my
Emacs extremely slow and unresponsive, I can hardly finish typing this
e-mail.
If I switch to some other buffer so that no such selectors are currently
visible, my Emacs is responsive.
Now that I switched back to this buffer to send this e-mail, it is
terribly slow again.
Same problem when one of the Unicode emoji data files is displayed which
contains these selectors. Emacs becomes unusably slow.
--
Mike FABIAN <mfabian@redhat.com>
睡眠不足はいい仕事の敵だ。
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, (continued)
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Mike FABIAN, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly,
Mike FABIAN <=
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Mike FABIAN, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Mike FABIAN, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Mike FABIAN, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Mike FABIAN, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2020/02/28
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2020/02/28