grimm-nixos-laptop/common/graphics/opengl.nix

{
  pkgs,
  config,
  lib,
  ...
}:
let
  cfg = config.grimmShared;
  screen =
    with lib;
    types.submodule {
      options = {
        fps = mkOption {
          type = types.either types.int (types.nonEmptyListOf types.int);
          default = 60;
          description = "max framerate of screen";
        };

        mode = mkOption {
          type = types.nonEmptyStr;
          default = "1920x1080";
          description = "pixel format of the screen";
        };

        id = mkOption {
          type = types.nonEmptyStr;
          description = "ID of the screen";
        };

        pos = mkOption {
          type = types.nullOr types.nonEmptyStr;
          default = null;
          example = "0,0";
          description = "position where to place the screen";
        };
      };
    };
in
{
  config =
    with cfg;
    lib.mkIf (enable && graphical) {
      # Enable OpenGL
      hardware.opengl = {
        enable = true;
        driSupport = true;
        driSupport32Bit = true;
        extraPackages = with pkgs; [ ];
      };

      chaotic.mesa-git.enable = true;
      boot.kernelParams = [ "nouveau.config=NvGspRm=1" ];

      environment.sessionVariables = {
        __GL_LOG_MAX_ANISO = "0";
        __GL_SHADER_DISK_CACHE = "1";
        __GL_SYNC_TO_VBLANK = "0";
        __GL_THREADED_OPTIMIZATIONS = "1";
        __GL_VRR_ALLOWED = "1";
        #     MESA_LOADER_DRIVER_OVERRIDE="zink";
        #     FLATPAK_GL_DRIVERS="mesa-git";
      };

      environment.systemPackages = with pkgs; [
        glfw
        glxinfo
        vulkan-tools
        mangohud
      ];
    };

  options.grimmShared = with lib; {
    graphical = mkOption {
      type = types.bool;
      default = cfg.screens != { };
      description = "whether to force enable graphical components";
    };

    screens = mkOption {
      type = types.attrsOf screen;
      default = { };
      description = "Screens to initialize, will activate graphical components";
    };
  };
}