{ config, lib, pkgs, pkgs_i686, ... }: with lib; let cfg = config.hardware.opengl; kernelPackages = config.boot.kernelPackages; videoDrivers = config.services.xserver.videoDrivers; makePackage = p: p.buildEnv { name = "mesa-drivers+txc-${p.mesa_drivers.version}"; paths = [ p.mesa_drivers p.mesa_noglu # mainly for libGL (if cfg.s3tcSupport then p.libtxc_dxtn else p.libtxc_dxtn_s2tc) ]; }; in { options = { hardware.opengl.enable = mkOption { description = "Whether this configuration requires OpenGL."; type = types.bool; default = false; internal = true; }; hardware.opengl.driSupport = mkOption { type = types.bool; default = true; description = '' Whether to enable accelerated OpenGL rendering through the Direct Rendering Interface (DRI). ''; }; hardware.opengl.driSupport32Bit = mkOption { type = types.bool; default = false; description = '' On 64-bit systems, whether to support Direct Rendering for 32-bit applications (such as Wine). This is currently only supported for the nvidia and ati_unfree drivers, as well as Mesa. ''; }; hardware.opengl.s3tcSupport = mkOption { type = types.bool; default = false; description = '' Make S3TC(S3 Texture Compression) via libtxc_dxtn available to OpenGL drivers instead of the patent-free S2TC replacement. Using this library may require a patent license depending on your location. ''; }; hardware.opengl.package = mkOption { type = types.package; internal = true; description = '' The package that provides the OpenGL implementation. ''; }; hardware.opengl.package32 = mkOption { type = types.package; internal = true; description = '' The package that provides the 32-bit OpenGL implementation on 64-bit systems. Used when is set. ''; }; }; config = mkIf cfg.enable { assertions = lib.singleton { assertion = cfg.driSupport32Bit -> pkgs.stdenv.isx86_64; message = "Option driSupport32Bit only makes sense on a 64-bit system."; }; system.activationScripts.setup-opengl = '' ln -sfn ${cfg.package} /run/opengl-driver ${if pkgs.stdenv.isi686 then '' ln -sfn opengl-driver /run/opengl-driver-32 '' else if cfg.driSupport32Bit then '' ln -sfn ${cfg.package32} /run/opengl-driver-32 '' else '' rm -f /run/opengl-driver-32 ''} ''; environment.sessionVariables.LD_LIBRARY_PATH = [ "/run/opengl-driver/lib" "/run/opengl-driver-32/lib" ]; hardware.opengl.package = mkDefault (makePackage pkgs); hardware.opengl.package32 = mkDefault (makePackage pkgs_i686); boot.extraModulePackages = optional (elem "virtualbox" videoDrivers) kernelPackages.virtualboxGuestAdditions; }; }