Add display scaling option for GDK applications

hosts/laptop/default.nix

@@ -16,4 +16,5 @@
   modules.gpg.signingKey = "0x530DA0331EFE99F5";
   modules.gnomeBoxes.enable = true;
 
+  modules.display.scale = 2;
 }

modules/core/user.nix

@@ -28,6 +28,7 @@ in
     users.${username} = {
       imports = [ ../../homes/${username}/home.nix ];
       modules.gpg.signingKey = config.modules.gpg.signingKey;
+      modules.display.scale = config.modules.display.scale;
     };
   };
 

modules/homes/hyprland/hyprland.nix

@@ -7,6 +7,7 @@
 with lib;
 let
   cfg = config.modules.hyprland;
+  displayCfg = config.modules.display;
 in
 {
   wayland.windowManager.hyprland = {
@@ -56,6 +57,7 @@ in
         "XDG_CURRENT_DESKTOP, Hyprland"
         "XDG_SESSION_DESKTOP, Hyprland"
         "XDG_SESSION_TYPE, wayland"
+        "GDK_SCALE, ${toString displayCfg.scale}"
       ];
 
       xwayland = {

modules/options/default.nix

@@ -4,6 +4,7 @@
 {
   imports = [
     ./discord.nix
+    ./display.nix
     ./displayManager.nix
     ./gnomeBoxes.nix
     ./gpg.nix

modules/options/display.nix

@@ -0,0 +1,14 @@
+{
+  lib,
+  ...
+}:
+with lib;
+{
+  options.modules.display = {
+    scale = mkOption {
+      type = types.int;
+      default = 1;
+      description = "Display Scaling";
+    };
+  };
+}