Re: Font weight selection problem

[Nicolas P. Rougier (inria)]

On Tue 23 Jan 2024 at 19:28, Eli Zaretskii <eliz@gnu.org> wrote:

> Did you try to change the order between :family and :weight in 
> your
> 'propertize' call?

No change.

> > I think the problem has been here since at least version 28.0
> I'm not sure it was ever supported.  Can you make that do what 
> you
> expect in older versions of Emacs?

With version 27.0 I was able to select the "Roboto Mono" light, 
but version 28.0 did not work anymore for some reason. I solved 
the issue by creating a font file with a unique weight (light) 
(and named it differently). It looks as if Emacs is confused by 
the "light" version inside the font but I don't know if the font 
is malformed or if Emacs interprets "light" differently. I've 
tried other fonts and the light face always ends up either thin or 
regular, which makes me think that Emacs might be the cause.

I've since found what seems to be a relevant (small) patch:
https://github.com/yaglo/emacs-mac-patches/blob/main/fix_weights_and_widths.diff

but I did not tested it yet. The patch change values for weights 
but I don't know what is the semantic of these values (and if it 
is relevant here).

Nicolas

--
Nicolas P. Rougier —— www.labri.fr/perso/nrougier
Institute of Neurodegenerative Diseases, Bordeaux