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Subject: bug#79903: [31.0.50] : emoji sequences aren't properly displayed with -no-harfbuzz
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Heya, I tested :
- Wayland -pgtk, with and without harfBuzz.
- X, -with-x=3Dyes, with and without harfBuzz.
- X, -pgtk, with and without harfBuzz.

When harfBuzz is present (or we are in -nw), it displays sequences as one; =
when harfBuzz isn't, the sequence is left "raw".

I.e, emoji sequences, such as
=F0=9F=8F=B3=EF=B8=8F=E2=80=8D=F0=9F=8C=88=F0=9F=8F=B3=EF=B8=8F=E2=80=8D=
=E2=9A=A7=EF=B8=8F=F0=9F=8F=B4=E2=80=8D=E2=98=A0=EF=B8=8F (found in emoji-l=
ist > flags > flag)
are instead displayed as
U+1F3F3 U+FE0F U+200D U+1F308 (rainbow-flag)
U+1F3F3 U+FE0F U+200D U+26A7 U+FE0F (transgender-flag)
U+1F3F4 U+200D U+2620 U+FE0F (pirate-flag)

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: ana@HIDDEN
Subject: bug#79903: Acknowledgement ([31.0.50] : emoji sequences aren't
 properly displayed with -no-harfbuzz)
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Date: Thu, 27 Nov 2025 19:21:02 +0000

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Subject: bug#79903: [31.0.50] : emoji sequences aren't properly displayed with -no-harfbuzz
Resent-From: Eli Zaretskii <eliz@HIDDEN>
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tags 79903 notabug wontfix
thanks

> Date: Thu, 27 Nov 2025 19:20:01 +0000
> From: ana--- via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> 
> Heya, I tested :
> - Wayland -pgtk, with and without harfBuzz.
> - X, -with-x=yes, with and without harfBuzz.
> - X, -pgtk, with and without harfBuzz.
> 
> When harfBuzz is present (or we are in -nw), it displays sequences as one; when harfBuzz isn't, the sequence is left "raw".
> 
> I.e, emoji sequences, such as
> 🏳️‍🌈🏳️‍⚧️🏴‍☠️ (found in emoji-list > flags > flag)
> are instead displayed as
> U+1F3F3 U+FE0F U+200D U+1F308 (rainbow-flag)
> U+1F3F3 U+FE0F U+200D U+26A7 U+FE0F (transgender-flag)
> U+1F3F4 U+200D U+2620 U+FE0F (pirate-flag)

When you build Emacs without HarfBuzz, complex text shaping, which
Emoji display needs, is not guaranteed to work correctly.  We decided
long ago to consider HarfBuzz the only shaping engine which we fully
support for these features; other shaping engines (if you at all built
Emacs with any of them; you didn't tell) will work or won't work,
according to their limited capabilities.

In a -nw session, text shaping is done by the terminal emulator, so
what you see depends on the terminal emulator you used, not on Emacs.

This is not a bug.

Message received at control <at> debbugs.gnu.org:

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Date: Fri, 28 Nov 2025 08:59:18 +0200
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 (bug-gnu-emacs@HIDDEN)
Subject: Re: bug#79903: [31.0.50] : emoji sequences aren't properly displayed
 with -no-harfbuzz
References: <FWeiwi_YUwCp90FiKgK3Y4jAmve3m3_Lj3aW9iSTMBOqzaqvRTWhrusZi5vGBDtiX6sxDwctlhsFziUZq8xO2fFwwFROzfqoWLBzbRcu54Y=@kigoth.pink>
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tags 79903 notabug wontfix
thanks

> Date: Thu, 27 Nov 2025 19:20:01 +0000
> From: ana--- via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> 
> Heya, I tested :
> - Wayland -pgtk, with and without harfBuzz.
> - X, -with-x=yes, with and without harfBuzz.
> - X, -pgtk, with and without harfBuzz.
> 
> When harfBuzz is present (or we are in -nw), it displays sequences as one; when harfBuzz isn't, the sequence is left "raw".
> 
> I.e, emoji sequences, such as
> 🏳️‍🌈🏳️‍⚧️🏴‍☠️ (found in emoji-list > flags > flag)
> are instead displayed as
> U+1F3F3 U+FE0F U+200D U+1F308 (rainbow-flag)
> U+1F3F3 U+FE0F U+200D U+26A7 U+FE0F (transgender-flag)
> U+1F3F4 U+200D U+2620 U+FE0F (pirate-flag)

When you build Emacs without HarfBuzz, complex text shaping, which
Emoji display needs, is not guaranteed to work correctly.  We decided
long ago to consider HarfBuzz the only shaping engine which we fully
support for these features; other shaping engines (if you at all built
Emacs with any of them; you didn't tell) will work or won't work,
according to their limited capabilities.

In a -nw session, text shaping is done by the terminal emulator, so
what you see depends on the terminal emulator you used, not on Emacs.

This is not a bug.

Last modified: Fri, 28 Nov 2025 07:15:01 UTC

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