GNU bug report logs - #53729
29.0.50; Tamil text not shaped in modeline

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Visuwesh <visuweshm <at> gmail.com>
Subject: bug#53729: closed (Re: bug#53729: 29.0.50; Tamil text not shaped
 in modeline)
Date: Sat, 19 Feb 2022 12:40:01 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#53729: 29.0.50; Tamil text not shaped in modeline

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 53729 <at> debbugs.gnu.org.

-- 
53729: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=53729
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Visuwesh <visuweshm <at> gmail.com>
Cc: 53729-done <at> debbugs.gnu.org, jaivetrivelan <at> gmail.com
Subject: Re: bug#53729: 29.0.50; Tamil text not shaped in modeline
Date: Sat, 19 Feb 2022 14:38:53 +0200

> From: Visuwesh <visuweshm <at> gmail.com>
> Cc: jaivetrivelan <at> gmail.com,  53729 <at> debbugs.gnu.org
> Date: Sat, 19 Feb 2022 15:57:14 +0530
> 
> [சனி, பிப்ரவரி 19 2022] Eli Zaretskii wrote:
> 
> >> IOW, the problem happens when the buffer is unibyte, probably because
> >> we disable text shaping (a.k.a. "character compositions") in that
> >> case.
> >
> > I hope I've now fixed this on the master branch, please test.
> 
> Can confirm that it is fixed.  Thanks a lot, Eli!

Thanks, closing.

[Message part 3 (message/rfc822, inline)]

From: Visuwesh <visuweshm <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.50; Tamil text not shaped in modeline
Date: Wed, 02 Feb 2022 22:25:48 +0530

[Message part 4 (text/plain, inline)]

Tamil text is not shaped properly in the modeline.  Please view the
attached file "Noto_Serif_modeline.jpg" to see what I mean.  I set
"tamil" script to use "Noto Serif Tamil" in the default fontset like so,

    (set-fontset-font "fontset-default" 'tamil '("Noto Serif Tamil" . "iso10646-1"))

Changing the font to "Lohit Tamil" [1] does not fix the shaping issue so
Noto Serif Tamil is not the problem (See file
"Lohit_Tamil_modeline.png").

As shown in "Noto_Serif_Expected.png", the text is shaped as I would
expect, in the minibuffer.

To see if this was specific to Tamil, I tried creating a buffer named
"मेरा" and "नमस्कार" ("mera" and "namaskaar C-b DEL" in devanagari-itrans)
but they are shaped better (but not the same as in-buffer text).  I also
set "devanagari" script to use "Noto Serif Devanagari" in the default
fontset.

I also see the problem in a GTK3 build of Emacs 27.2 (sorry, I do not
have the time to check Emacs 28 or Emacs 29 GTK3, PGTK build right now).

1. https://releases.pagure.org/lohit/lohit-tamil-ttf-2.91.3.tar.gz

[Noto_Serif_Expected.png (image/png, attachment)]

[Noto_Serif_modeline.png (image/png, attachment)]

[Lohit_Tamil_modeline.png (image/png, attachment)]

[Devanagari.png (image/png, attachment)]

[Message part 9 (text/plain, inline)]

In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw scroll bars)
Repository revision: 58bb9eb4005599155a8fce8d5c5beb531a72c534
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: NixOS 21.11 (Porcupine)

Configured using:
 'configure
 --prefix=/nix/store/0m0yw7b3zly74ljs3qmkblb780xg03id-emacs-git-20220130.0
 --disable-build-details --with-modules --with-x-toolkit=lucid
 --with-xft --with-cairo --with-native-compilation'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM LUCID ZLIB

Important settings:
  value of $EMACSLOADPATH: 
  value of $EMACSNATIVELOADPATH: /nix/store/07cbjwzil3jfhyifj15h60k7yvixzqxs-emacs-packages-deps/share/emacs/native-lisp::
  value of $LANG: en_GB.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gpm-mouse-mode: t
  shell-dirtrack-mode: t
  recentf-mode: t
  gnus-undo-mode: t
  eros-mode: t
  pdf-occur-global-minor-mode: t
  minibuffer-depth-indicate-mode: t
  repeat-mode: t
  display-time-mode: t
  display-battery-mode: t
  straight-use-package-mode: t
  straight-package-neutering-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tab-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: linux
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  indent-tabs-mode: t
  transient-mark-mode: t

Load-path shadows:
/home/viz/.nix-profile/share/emacs/site-lisp/site-start hides /nix/store/07cbjwzil3jfhyifj15h60k7yvixzqxs-emacs-packages-deps/share/emacs/site-lisp/site-start
/home/viz/lib/emacs/straight/build/map/map hides /nix/store/0m0yw7b3zly74ljs3qmkblb780xg03id-emacs-git-20220130.0/share/emacs/29.0.50/lisp/emacs-lisp/map
/home/viz/lib/emacs/straight/build/let-alist/let-alist hides /nix/store/0m0yw7b3zly74ljs3qmkblb780xg03id-emacs-git-20220130.0/share/emacs/29.0.50/lisp/emacs-lisp/let-alist

Features:
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text-property-search pp jka-compr pdf-cache pdf-info tq pdf-util
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chemtable-autoloads molar-mass-autoloads pcase straight-autoloads info
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dbusbind inotify dynamic-setting system-font-setting font-render-setting
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Memory information:
((conses 16 2101434 313772)
 (symbols 48 56342 74)
 (strings 32 371367 47970)
 (string-bytes 1 159337297)
 (vectors 16 144937)
 (vector-slots 8 3674344 378355)
 (floats 8 35189 1747)
 (intervals 56 182734 6086)
 (buffers 992 90))

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