steam tinkering

hosts/extra/steam/default.nix

@@ -1,23 +1,52 @@
-{ pkgs, ... }:
-{
-  programs.steam = {
-    enable = true;
-    package = pkgs.steam.override {
-      extraPkgs =
-        pkgs: with pkgs; [
-          xorg.libXcursor
-          xorg.libXi
-          xorg.libXinerama
-          xorg.libXScrnSaver
-          libpng
-          libpulseaudio
-          libvorbis
-          stdenv.cc.cc.lib
-          libkrb5
-          keyutils
-          gamescope
-          mangohud
-        ];
+{pkgs, ...}: {
+  programs = {
+    steam = {
+      enable = true;
+      extraCompatPackages = [
+        pkgs.proton-ge-bin
+        pkgs.vkd3d-proton
+      ];
+      gamescopeSession.enable = true;
+      package = pkgs.steam.override {
+        extraPkgs = pkgs:
+          with pkgs; [
+            xorg.libXcursor
+            xorg.libXi
+            xorg.libXinerama
+            xorg.libXScrnSaver
+            libpng
+            libpulseaudio
+            libvorbis
+            stdenv.cc.cc.lib
+            libkrb5
+            keyutils
+            mangohud
+            SDL2
+            SDL2_image
+          ];
+      };
+    };
+    gamescope = {
+      enable = true;
+      capSysNice = true;
+    };
+    gamemode = {
+      enable = true;
+      settings = {
+        general = {
+          renice = 10;
+        };
+        gpu = {
+          apply_gpu_optimisations = "accept-responsibility";
+          gpu_device = 1;
+          amd_performance_level = "high";
+        };
+        custom = {
+          start = "${pkgs.libnotify}/bin/notify-send 'GameMode started'";
+          end = "${pkgs.libnotify}/bin/notify-send 'GameMode ended'";
+        };
+      };
     };
   };
+  environment.variables.AMD_VULKAN_ICD = "RADV";
 }