From 0242265e551d0ea9f674bf771065f353f780b1a5 Mon Sep 17 00:00:00 2001
From: wackbyte <wackbyte@pm.me>
Date: Fri, 8 Oct 2021 20:07:03 -0400
Subject: [PATCH] nixos/plasma5: add useQtScaling option

closes #105943
---
 nixos/modules/services/x11/desktop-managers/plasma5.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/nixos/modules/services/x11/desktop-managers/plasma5.nix b/nixos/modules/services/x11/desktop-managers/plasma5.nix
index 7dfecf6e6f5e..11cb4d3b8a95 100644
--- a/nixos/modules/services/x11/desktop-managers/plasma5.nix
+++ b/nixos/modules/services/x11/desktop-managers/plasma5.nix
@@ -168,6 +168,12 @@ in
           disabled by default.
         '';
       };
+
+      useQtScaling = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Enable HiDPI scaling in Qt.";
+      };
     };
 
   };
@@ -340,6 +346,8 @@ in
 
       environment.etc."X11/xkb".source = xcfg.xkbDir;
 
+      environment.sessionVariables.PLASMA_USE_QT_SCALING = mkIf cfg.useQtScaling "1";
+
       # Enable GTK applications to load SVG icons
       services.xserver.gdk-pixbuf.modulePackages = [ pkgs.librsvg ];