{ config, pkgs, lib, ... }:

with lib;

{
  options.hardware.genode.framebuffer = {
    enable = lib.mkEnableOption "framebuffer driver";
    driver = mkOption {
      type = types.enum [ "boot" "vesa" ];
      default = "vesa";
    };
  };

  config = {

    genode.core.children.fb_drv =
      mkIf config.hardware.genode.framebuffer.enable {
        configFile = let
          binary = with pkgs.genodePackages;
            {
              boot = boot_fb_drv;
              vesa = vesa_drv;
            }.${config.hardware.genode.framebuffer.driver};
        in builtins.toFile "fb_drv.dhall" ''
          let Sigil = env:DHALL_SIGIL

          let Init = Sigil.Init

          in  λ(binary : Text) →
                Init.Child.flat
                  Init.Child.Attributes::{
                  , binary
                  , resources = Init.Resources::{ caps = 256, ram = Sigil.units.MiB 32 }
                  , routes =
                    [ Init.ServiceRoute.parent "IO_MEM"
                    , Init.ServiceRoute.parent "IO_PORT"
                    ]
                  }
        '';
      };

  };

}