diff options
author | rnhmjoj <rnhmjoj@inventati.org> | 2021-08-09 23:39:54 +0200 |
---|---|---|
committer | rnhmjoj <rnhmjoj@inventati.org> | 2021-08-15 12:01:38 +0200 |
commit | dd38ae1f2c0ae9eb53a3454b0633c2b29f14a0ef (patch) | |
tree | b51bfb97a1151168884d8d9c9050f500c47a6be7 /nixos/modules/config/fonts | |
parent | 47787b24f425579151a09869364c5fa827ed80bf (diff) |
nixos/fonts: scale X11 core cursor
Most desktop environments manage the cursor using the Xcursor library
by default; this comes with scalable or multiple-sized cursor themes.
However, when running just a simple WM (twm, bspwm, ...) the cursor
handling is left to the X server, which uses a very simple fixed bitmap
font (this is called a "core" cursor). The font is uncomfortably small
on a high DPI display and must be replaced with a saner default.
Up until recently[1] it used to be possible to change the font on the
xserver command line, however the font name is now hardcoded. It's still
possible to change it, though: here I override the `fontcursormisc`
package and set an alias that points to a vector variant of the original
cursor font. The font size is set to match the standard cursor
dimensions on a 96dpi display. It's not perfect but it's a very simple
and effective solution.
[1]: https://gitlab.freedesktop.org/xorg/xserver/-/commit/56ea4c769c2d65df2de86009e8e499f39a8a3d4d
Diffstat (limited to 'nixos/modules/config/fonts')
-rw-r--r-- | nixos/modules/config/fonts/fonts.nix | 70 |
1 files changed, 50 insertions, 20 deletions
diff --git a/nixos/modules/config/fonts/fonts.nix b/nixos/modules/config/fonts/fonts.nix index 3911196c1013..60a0885103d2 100644 --- a/nixos/modules/config/fonts/fonts.nix +++ b/nixos/modules/config/fonts/fonts.nix @@ -2,6 +2,52 @@ with lib; +let + # A scalable variant of the X11 "core" cursor + # + # If not running a fancy desktop environment, the cursor is likely set to + # the default `cursor.pcf` bitmap font. This is 17px wide, so it's very + # small and almost invisible on 4K displays. + fontcursormisc_hidpi = pkgs.xorg.fontcursormisc.overrideAttrs (old: + let + # The scaling constant is 230/96: the scalable `left_ptr` glyph at + # about 23 points is rendered as 17px, on a 96dpi display. + # Note: the XLFD font size is in decipoints. + size = 2.39583 * config.services.xserver.dpi; + sizeString = builtins.head (builtins.split "\\." (toString size)); + in + { + postInstall = '' + alias='cursor -xfree86-cursor-medium-r-normal--0-${sizeString}-0-0-p-0-adobe-fontspecific' + echo "$alias" > $out/lib/X11/fonts/Type1/fonts.alias + ''; + }); + + hasHidpi = + config.hardware.video.hidpi.enable && + config.services.xserver.dpi != null; + + defaultFonts = + [ pkgs.dejavu_fonts + pkgs.freefont_ttf + pkgs.gyre-fonts # TrueType substitutes for standard PostScript fonts + pkgs.liberation_ttf + pkgs.unifont + pkgs.noto-fonts-emoji + ]; + + defaultXFonts = + [ (if hasHidpi then fontcursormisc_hidpi else pkgs.xorg.fontcursormisc) + pkgs.xorg.fontmiscmisc + ] ++ optionals (config.nixpkgs.config.allowUnfree or false) + [ # these are unfree, and will make usage with xserver fail + pkgs.xorg.fontbhlucidatypewriter100dpi + pkgs.xorg.fontbhlucidatypewriter75dpi + pkgs.xorg.fontbh100dpi + ]; + +in + { imports = [ (mkRemovedOptionModule [ "fonts" "enableCoreFonts" ] "Use fonts.fonts = [ pkgs.corefonts ]; instead.") @@ -32,25 +78,9 @@ with lib; }; - config = { - - fonts.fonts = mkIf config.fonts.enableDefaultFonts - ([ - pkgs.dejavu_fonts - pkgs.freefont_ttf - pkgs.gyre-fonts # TrueType substitutes for standard PostScript fonts - pkgs.liberation_ttf - pkgs.xorg.fontmiscmisc - pkgs.xorg.fontcursormisc - pkgs.unifont - pkgs.noto-fonts-emoji - ] ++ lib.optionals (config.nixpkgs.config.allowUnfree or false) [ - # these are unfree, and will make usage with xserver fail - pkgs.xorg.fontbhlucidatypewriter100dpi - pkgs.xorg.fontbhlucidatypewriter75dpi - pkgs.xorg.fontbh100dpi - ]); - - }; + config = mkMerge [ + { fonts.fonts = mkIf config.fonts.enableDefaultFonts defaultFonts; } + { fonts.fonts = mkIf config.services.xserver.enable defaultXFonts; } + ]; } |