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Emacs 28: bitmap fonts, vector font character spacing
From: |
Christoph Groth |
Subject: |
Emacs 28: bitmap fonts, vector font character spacing |
Date: |
Mon, 24 Jul 2023 15:15:24 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Hello,
I’m having some trouble trying to set up a pleasant font after upgrading
to Emacs 28. Would someone be so kind to help?
For many years I was happily using the “Terminus” bitmap font in Emacs
and terminal windows on “regular density” displays. On “HiDPI” displays
I switched to vector fonts, but for low density displays I preferred the
crisp Terminus.
I recently upgraded Emacs from 27.1 to 28.2 as part of upgrading to the
new Debian stable and this broke my font setup. I have something like
the following in my emacs config.
(add-to-list 'default-frame-alist '(font . "Terminus-12"))
With Emacs 28.2 the default font is now much too small (I’m not even
sure whether it’s still Terminus). It is possible to choose Terminus
with M-x menu-set-font, but this shows the same tiny font independently
of the chosen size.
I noticed the following entry in NEWS:
> ** The Cairo graphics library is now used by default if present.
> '--with-cairo' is now the default, if the appropriate development
> files are found by 'configure'. Building with Cairo is known to cause
> some problems with bitmap fonts. This may require you to adjust your
> font settings, or to build with Xft support instead.
Unfortunately, this is not very specific. Do “some problems” mean that
fonts like Terminus no longer work and that I have to recompile Emacs if
I want to use them, or is there some workaround? I tried to find one,
but so far without success.
----------------------------------------------------------------
So, OK, I thought I’d go with the time and switch to a vector font on
low-density displays as well. I like how Fira Code Light looks in
xfce4-terminal.
I managed to set it to the size I like through
(add-to-list
'default-frame-alist
'(font . "-CTDB-Fira Code-light-normal-normal-*-14-*-*-*-m-0-iso10646-1"))
(Interestingly, I am not able to obtain this size by simply using “Fira
Code-N”. The font is either too small or too large!)
Anyway, while with the above the vertical line spacing matches the one in
xfce4-terminal, the horizontal inter-character distance is somewhat
wider. Is there a way to render the font like in xfce4-terminal?
(I believe that this issue could be related to kerning being handled
differently by Emacs/Cairo, but I did not manage to find any information
on how to adjust it.)
For reference:
----------------------------------------------------------------
(frame-parameter nil 'font-backend)
(ftcrhb x)
system-configuration-features
"ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11
XDBE XIM XPM GTK3 ZLIB"
----------------------------------------------------------------
My ~/.Xresources contains
----------------------------------------------------------------
Xft.antialias: 0
Xft.hinting: 0
Xft.hintstyle: hintfull
Xft.lcdfilter: lcddefault
Xft.rgba: rgb
----------------------------------------------------------------
Cheers
Christoph
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- Emacs 28: bitmap fonts, vector font character spacing,
Christoph Groth <=
- Re: Emacs 28: bitmap fonts, vector font character spacing, Eli Zaretskii, 2023/07/24
- Re: Emacs 28: bitmap fonts, vector font character spacing, PierGianLuca, 2023/07/24
- Re: Emacs 28: bitmap fonts, vector font character spacing, Manuel Giraud, 2023/07/25
- Re: Emacs 28: bitmap fonts, vector font character spacing, PierGianLuca, 2023/07/27