add steam

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

hosts/laptop/configuration.nix

@@ -13,6 +13,7 @@
     ../../nixos/utils.nix
     ../../nixos/hyprland.nix
     ../../nixos/usbguard.nix
+    ../../nixos/steam.nix
     ../../home/programs/gui/helium/system.nix # I hate browser's configuration..
 
     ../../nixos/omen.nix # CHANGEME: For my laptop only, remove this (OMEN 16)

nixos/steam.nix

@@ -0,0 +1,30 @@
+# Source: https://github.com/Dylouwu/MyNixy/blob/main/nixos/steam.nix
+{
+  config,
+  pkgs,
+  ...
+}: {
+  programs.steam = {
+    enable = true;
+    gamescopeSession.enable = true;
+  };
+
+  environment.systemPackages = with pkgs; [
+    mangohud
+    protonup-ng
+  ];
+
+  environment.sessionVariables = {
+    STEAM_EXTRA_COMPAT_TOOLS_PATHS = "/home/${config.var.username}/.steam/root/compatibilitytools.d";
+  };
+
+  programs.gamemode.enable = true;
+}
+# Example of recommanded launch options for your games in Steam :
+# Regular gaming :
+# LD_PRELOAD="" gamescope -W 2560 -H 1440 -r 360 -f -- %command%
+# LD_PRELOAD="" gamescope -W 3440 -H 1440 -r 140 -f -- %command%
+# HDR gaming :
+# LD_PRELOAD="" ENABLE_HDR_WSI=1 gamescope -w 2560 -h 1440 -r 360 -f --hdr-enabled --hdr-debug-force-output --hdr-sdr-content-nits 600 -- env ENABLE_GAMESCOPE_WSI=1 DXVK_HDR=1 DISABLE_HDR_WSI=1 VKD3D_DISABLE_EXTENSIONS=VK_KHR_present_wait %command%
+# LD_PRELOAD="" removes a glitch causing games to slow down after roughly 24 minutes
+# For the rest of the command, you can change the values to match your screen resolution and refresh rate