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83 lines
3.8 KiB
Nix
83 lines
3.8 KiB
Nix
{ config, pkgs, lib, ... }:
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let
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version = "45.4";
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in
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{
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# https://wiki.archlinux.org/title/HiDPI#Wayland
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# Results in blurry font in non-Wayland applications :/
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# https://wiki.archlinux.org/title/HiDPI#Xorg
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# https://devicetests.com/set-different-scaling-multi-monitors-gnome
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# "scale-monitor-framebuffer": This allows GNOME to scale each monitor’s framebuffer independently, which is necessary for per-monitor scaling.
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# "x11-randr-fractional-scaling": This allows fractional scaling, which gives you finer control over the scaling factor.
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# TODO open issue: Fractional scaling can't be enabled with multiple monitors.
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# https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/2076
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# https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/2365
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# -> https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/2008355
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programs.dconf.enable = true;
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# Overlays.
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# https://nixos.wiki/wiki/Overlays#In_NixOS
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# https://discourse.nixos.org/t/use-specific-pkg-version-in-overlay/32741/3
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# If on X11, then use patched version of mutter.
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nixpkgs.overlays = lib.mkIf (! config.services.xserver.displayManager.gdm.wayland) [
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(
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# Patched version of mutter 44.2.
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# Outdated example: https://nixos.wiki/wiki/Overlays#Overriding_a_package_inside_a_scope
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#
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# On the AUR, they apply only one patch, not three.
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# And they pick the patch that corresponds to the mutter version.
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# https://aur.archlinux.org/packages/mutter-x11-scaling
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#
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# New patch URL:
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# -> https://salsa.debian.org/gnome-team/mutter/-/blob/ubuntu/master/debian/patches/ubuntu/x11-Add-support-for-fractional-scaling-using-Randr.patch
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# For release 44.2:
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# -> https://salsa.debian.org/gnome-team/mutter/-/tags?sort=updated_desc&search=ubuntu%2F
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# -> https://salsa.debian.org/gnome-team/mutter/-/tags/ubuntu%2F44.2-3ubuntu1
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# -> https://salsa.debian.org/gnome-team/mutter/-/raw/ubuntu/44.2-3ubuntu1/debian/patches/ubuntu/x11-Add-support-for-fractional-scaling-using-Randr.patch
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# For release 45.3:
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# -> https://salsa.debian.org/gnome-team/mutter/-/tags?sort=updated_desc&search=ubuntu%2F
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# -> https://salsa.debian.org/gnome-team/mutter/-/tags/ubuntu%2F45.3-1ubuntu1
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# -> https://salsa.debian.org/gnome-team/mutter/-/raw/ubuntu/45.3-1ubuntu1/debian/patches/ubuntu/x11-Add-support-for-fractional-scaling-using-Randr.patch
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# Elements of nixpkgs must be taken from final and prev.
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final: prev: {
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# Elements of pkgs.gnome must be taken from gfinal and gprev.
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gnome = prev.gnome.overrideScope' (gfinal: gprev: {
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mutter = gprev.mutter.overrideAttrs (oldAttrs:
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if oldAttrs.version == version then
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{
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patches = (oldAttrs.patches or []) ++ [
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(prev.fetchpatch {
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url = "https://salsa.debian.org/gnome-team/mutter/-/raw/ubuntu/${version}-1ubuntu1/debian/patches/ubuntu/x11-Add-support-for-fractional-scaling-using-Randr.patch";
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# Determining the hash: https://github.com/NixOS/nixpkgs/issues/191128#issuecomment-1246030431
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hash = "sha256-snEgCuTsTEo0wQ5XsjEM53K2j7l4ZQ3t9FT3+Yfoti0=";
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})
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];
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}
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else throw "Mutter version mismatch. Please update patch to ${oldAttrs.version}"
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);
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});
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}
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)
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];
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home-manager.users.yoda = { osConfig, config, pkgs, ... }: {
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dconf.settings = {
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"org/gnome/mutter" = {
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experimental-features = (
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if (osConfig.services.xserver.displayManager.gdm.wayland)
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# Wayland
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then ["scale-monitor-framebuffer"]
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# X11
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else ["scale-monitor-framebuffer" "x11-randr-fractional-scaling"]
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);
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};
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};
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};
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}
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