GNU bug report logs - #70993
set-fontset-font doesn't use specified font for some scripts

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Message #23 received at 70993 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 70993 <at> debbugs.gnu.org, Rodrigo Morales <me <at> rodrigomorales.site>
Subject: Re: bug#70993: set-fontset-font doesn't use specified font for some
 scripts
Date: Fri, 28 Feb 2025 18:27:53 -0800

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Rodrigo Morales <me <at> rodrigomorales.site>
>> CC: <70993 <at> debbugs.gnu.org>
>> Date: Sat, 18 May 2024 01:17:33 -0500
>>
>> Eli Zaretskii <eliz <at> gnu.org> writes:
>>
>> > In any case, it sounds like Emacs rejects the Cozette font for some
>> > scripts.  Why that happens, I don't know, sorry.  Can you set font-log
>> > to nil before you visit your a.txt file, and then post the value of
>> > font-log after the file is displayed?  That could perhaps tell us
>> > something about the cause of this behavior.
>>
>> I performed two experiments. I emptied ~/.config/emacs/init.el and
>> inserted the sexps showed in the first code block below. The content of
>> =/tmp/a.txt= is shown in the second code block below.
>>
>> #+HEADER: :tangle ~/.config/emacs/init.el
>> #+BEGIN_SRC elisp
>> (set-fontset-font t 'brahmi (font-spec :family "Cozette"))
>> (set-fontset-font t 'egyptian (font-spec :family "Cozette"))
>> (set-fontset-font t 'ethiopic (font-spec :family "Cozette"))
>> (set-fontset-font t 'tagbanwa (font-spec :family "Cozette"))
>> (set-fontset-font t 'han (font-spec :family "Cozette"))
>> #+END_SRC
>>
>> #+HEADER: :tangle /tmp/a.txt
>> #+BEGIN_SRC text
>> The following lines were retrieved from the HELLO buffer which is
>> opened by calling view-hello-file in GNU Emacs 29.3.
>> Brahmi (𑀩𑁆𑀭𑀸𑀳𑁆𑀫𑀻)	𑀦𑀫𑀲𑁆𑀢𑁂
>> Egyptian Hieroglyphs (𓂋𓏤𓈖𓆎𓅓‌𓏏𓊖)	𓅓𓊵𓏏𓊪, 𓇍𓇋𓂻𓍘𓇋
>> Amharic (አማርኛ)	ሠላም
>> Tagbanwa (ᝦᝪᝯ)	ᝫᝩᝬᝥ ᝣᝮᝧᝯ
>> Chinese (中文,普通话,汉语)	你好
>> #+END_SRC
>>
>> 1. I launched =emacs= without the =-Q= flag so that
>>    =~/.config/emacs/init.el= is read. Then, I evaluated =(setq
>>    font-log nil)=. Then, I evaluated =(find-file
>>    "/tmp/a.txt")=. Brahmi and Egyptian Hieroglyphs were shown as
>>    hexadecimal codes inside boxes. Amharic, Tagbanwa and Chinese
>>    characters were shown using other fonts. Then, I evaluated
>>    =(describe-variable 'font-log)=. The content of the =*Help*= buffer
>>    can be found here:
>>    http://web.archive.org/web/20240518060947/http://0x0.st/XPqh.txt
>
> Did you also make Cozette the default font?  If not, why not?  I
> thought your intent was to use the same font for all the characters,
> including ASCII?  Emacs will use the default font for any non-ASCII
> characters that the default font supports, so if you want all of them
> to use Cozette, you should start Emacs as "emacs -fn Cozette", or use
> add-to-list to customize the 'font' parameter in default-frame-alist.

Ping.  I think we need more information here to proceed.

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