GNU bug report logs - #67810
29.1; fonts use synthetic bold on Linux / pgtk

Previous Next

Full log

Message #71 received at 67810 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Po Lu <luangruo <at> yahoo.com>
Cc: crypto <at> timruffing.de, 67810 <at> debbugs.gnu.org, stefankangas <at> gmail.com
Subject: Re: bug#67810: 29.1; fonts use synthetic bold on Linux / pgtk
Date: Fri, 12 Jan 2024 14:30:21 +0200

> From: Po Lu <luangruo <at> yahoo.com>
> Cc: crypto <at> timruffing.de,  stefankangas <at> gmail.com,  67810 <at> debbugs.gnu.org
> Date: Fri, 12 Jan 2024 20:20:00 +0800
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> > If we do introduce such a variable, wouldn't it prevent Emacs from
> > generating the missing variants?
> 
> On the contrary: if the generation of such variants by the font backend
> is inhibited, Emacs will display bold text with overstriking, when these
> variants are absent from the font itself.
> 
> I should clarify that "generation" refers to the automatic generation of
> oblique or bold fonts undertaken by a handful of our font backends, not
> the overstriking implemented in xfaces.c.

Then we are mis-communicating, I think: I was talking about the code
in xfaces.c to which you pointed up-thread:

> > Can you point me at the place in the code where we do this?
> 
> Yes, see lines 6192 and 6045 in xfaces.c, viz.:
> 
>   if (face->font
>       && FONT_WEIGHT_NAME_NUMERIC (attrs[LFACE_WEIGHT_INDEX]) > 100
>       && FONT_WEIGHT_NUMERIC (attrs[LFACE_FONT_INDEX]) <= 100)
>     face->overstrike = true;
> 
> and
> 
>   face->overstrike
>     = (! NILP (font_object)
>        && FONT_WEIGHT_NAME_NUMERIC (face->lface[LFACE_WEIGHT_INDEX]) > 100
>        && FONT_WEIGHT_NUMERIC (font_object) <= 100);

I ws suggesting to introduce a variable that would inhibit this.

> > And wouldn't avoiding to generate them do what the OP wanted,
> > i.e. have a default face's font where bold looks like regular?
> 
> No, see above.  However, the matter at hand is that I can't understand
> the deficiency OPs request is supposed to address.  Surely, if the
> author of a package which inserts icons wishes that they not be bold,
> the package should set the face by which they are displayed to one that
> isn't?

AFAIU, the OP's request was to allow to have a default font that lacks
the bold variant, so that the bold face attribute could be displayed
in some other way, or maybe not at all.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.