restructure x11

home/modules/linux/graphical/x11/hidpi.nix

@@ -0,0 +1,31 @@
+{ pkgs, config, lib, ... }:
+
+with lib;
+let
+  cfg = config.linux.graphical.x11;
+in
+{
+  options.linux.graphical.x11.hidpi = mkEnableOption "Enable hiDPI mode for X11";
+
+  config = mkIf cfg.hidpi {
+    # X resources for 4k monitor
+    home.file."4k.Xresources" = {
+      target = ".config/X11/.Xresources";
+      text = ''
+        Xft.dpi: 192
+        ! These might also be useful depending on your monitor and personal preference:
+        Xft.autohint: 0
+        Xft.lcdfilter:  lcddefault
+        Xft.hintstyle:  hintfull
+        Xft.hinting: 1
+        Xft.antialias: 1
+        Xft.rgba: rgb
+      '';
+    };
+    # Load 4k Xresources
+    xsession.initExtra = ''
+      xrdb -merge ~/.config/X11/.Xresources
+      feh --bg-fill ~/wallpaper.jpg
+    '';
+  };
+}