gamescope.nix

{ pkgs, ... }:
{
  environment.systemPackages = [
    pkgs.gamescope-wsi
  ];

  programs.steam.gamescopeSession = {
    enable = true;
    env = {
      MANGOHUD_CONFIG = "read_cfg";
      MANGOHUD_CONFIGFILE = toString ./MangoHud.conf;
      ENABLE_GAMESCOPE_WSI = "1";
      DXVK_HDR = "1";
    };
    args = [
      "--hdr-enabled"
      "--hdr-itm-enable"
      "--hide-cursor-delay 3000"
      "--fade-out-duration 200"
      "--xwayland-count 2"
      "--mangoapp"
      "-W 3840"
      "-H 2160"
      "-w 3840"
      "-h 2160"
      "-r 120"
      "--adaptive-sync"
      "-O HDMI-A-1"
      "--immediate-flips"
    ];
    steamArgs = [
      "-gamepadui"
      "-pipewire-dmabuf"
      "-steamos3"
    ];
  };
}