{ lib
, OpenGL
, Xplugin
, bison
, buildPackages
, directx-headers
, elfutils
, expat
, fetchCrate
, fetchurl
, file
, flex
, glslang
, intltool
, jdupes
, libdrm
, libffi
, libglvnd
, libomxil-bellagio
, libunwind
, libva-minimal
, libvdpau
, llvmPackages
, lm_sensors
, meson
, ninja
, openssl
, pkg-config
, python3Packages
, rust-bindgen
, rust-cbindgen
, rustPlatform
, rustc
, spirv-llvm-translator
, stdenv
, udev
, valgrind-light
, vulkan-loader
, wayland
, wayland-protocols
, wayland-scanner
, xcbutilkeysyms
, xorg
, zstd
, withValgrind ?
  lib.meta.availableOn stdenv.hostPlatform valgrind-light
  && !valgrind-light.meta.broken
, withLibunwind ? lib.meta.availableOn stdenv.hostPlatform libunwind
, enableGalliumNine ? stdenv.isLinux
, enableOSMesa ? stdenv.isLinux
, enableOpenCL ? stdenv.isLinux && stdenv.isx86_64
, enableTeflon ? stdenv.isLinux && stdenv.isAarch64  # currently only supports aarch64 SoCs, may change in the future
, enablePatentEncumberedCodecs ? true

, galliumDrivers ?
  if stdenv.isLinux
  then [
    "d3d12" # WSL emulated GPU (aka Dozen)
    "iris" # new Intel (Broadwell+)
    "kmsro" # special "render only" driver for GPUs without a display controller
    "nouveau" # Nvidia
    "radeonsi" # new AMD (GCN+)
    "r300" # very old AMD
    "r600" # less old AMD
    "swrast" # software renderer (aka LLVMPipe)
    "svga" # VMWare virtualized GPU
    "virgl" # QEMU virtualized GPU (aka VirGL)
    "zink" # generic OpenGL over Vulkan, experimental
  ] ++ lib.optionals (stdenv.isAarch64 || stdenv.isAarch32) [
    "etnaviv" # Vivante GPU designs (mostly NXP/Marvell SoCs)
    "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
    "lima" # ARM Mali 4xx
    "panfrost" # ARM Mali Midgard and up (T/G series)
    "vc4" # Broadcom VC4 (Raspberry Pi 0-3)
  ] ++ lib.optionals stdenv.isAarch64 [
    "tegra" # Nvidia Tegra SoCs
    "v3d" # Broadcom VC5 (Raspberry Pi 4)
  ] ++ lib.optionals stdenv.hostPlatform.isx86 [
    "crocus" # Intel legacy, x86 only
    "i915" # Intel extra legacy, x86 only
  ]
  else [ "auto" ]
, vulkanDrivers ?
  if stdenv.isLinux
  then [
    "amd" # AMD (aka RADV)
    "intel" # new Intel (aka ANV)
    "microsoft-experimental" # WSL virtualized GPU (aka DZN/Dozen)
    "nouveau" # Nouveau (aka NVK)
    "swrast" # software renderer (aka Lavapipe)
  ] ++ lib.optionals (stdenv.hostPlatform.isAarch -> lib.versionAtLeast stdenv.hostPlatform.parsed.cpu.version "6") [
    # QEMU virtualized GPU (aka VirGL)
    # Requires ATOMIC_INT_LOCK_FREE == 2.
    "virtio"
  ] ++ lib.optionals stdenv.isAarch64 [
    "broadcom" # Broadcom VC5 (Raspberry Pi 4, aka V3D)
    "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
    "imagination-experimental" # PowerVR Rogue (currently N/A)
    "panfrost" # ARM Mali Midgard and up (T/G series)
  ] ++ lib.optionals stdenv.hostPlatform.isx86 [
    "intel_hasvk" # Intel Haswell/Broadwell, "legacy" Vulkan driver (https://www.phoronix.com/news/Intel-HasVK-Drop-Dead-Code)
  ]
  else [ "auto" ]
, eglPlatforms ? [ "x11" ] ++ lib.optionals stdenv.isLinux [ "wayland" ]
, vulkanLayers ? lib.optionals (!stdenv.isDarwin) [ # No Vulkan support on Darwin
  "device-select"
  "overlay"
  "intel-nullhw"
]
}:

# When updating this package, please verify at least these build (assuming x86_64-linux):
# nix build .#mesa .#pkgsi686Linux.mesa .#pkgsCross.aarch64-multiplatform.mesa .#pkgsMusl.mesa

let
  version = "24.1.1";
  hash = "sha256-ADiCbG9+iNkLTOb3GRkvpYyn3t9O3KoRdM972SDvieo=";

  # Release calendar: https://www.mesa3d.org/release-calendar.html
  # Release frequency: https://www.mesa3d.org/releasing.html#schedule
  branch = lib.versions.major version;

  withLibdrm = lib.meta.availableOn stdenv.hostPlatform libdrm;

  haveWayland = lib.elem "wayland" eglPlatforms;
  haveZink = lib.elem "zink" galliumDrivers;
  haveDozen = (lib.elem "d3d12" galliumDrivers) || (lib.elem "microsoft-experimental" vulkanDrivers);

  rustDeps = [
    {
      pname = "paste";
      version = "1.0.14";
      hash = "sha256-+J1h7New5MEclUBvwDQtTYJCHKKqAEOeQkuKy+g0vEc=";
    }
    {
      pname = "proc-macro2";
      version = "1.0.70";
      hash = "sha256-e4ZgyZUTu5nAtaH5QVkLelqJQX/XPj/rWkzf/g2c+1g=";
    }
    {
      pname = "quote";
      version = "1.0.33";
      hash = "sha256-VWRCZJO0/DJbNu0/V9TLaqlwMot65YjInWT9VWg57DY=";
    }
    {
      pname = "syn";
      version = "2.0.39";
      hash = "sha256-Mjen2L/omhVbhU/+Ao65mogs3BP3fY+Bodab3uU63EI=";
    }
    {
      pname = "unicode-ident";
      version = "1.0.12";
      hash = "sha256-KX8NqYYw6+rGsoR9mdZx8eT1HIPEUUyxErdk2H/Rlj8=";
    }
  ];

  copyRustDep = dep: ''
    cp -R --no-preserve=mode,ownership ${fetchCrate dep} subprojects/${dep.pname}-${dep.version}
    cp -R subprojects/packagefiles/${dep.pname}/* subprojects/${dep.pname}-${dep.version}/
  '';

  copyRustDeps = lib.concatStringsSep "\n" (builtins.map copyRustDep rustDeps);

  needNativeCLC = !stdenv.buildPlatform.canExecute stdenv.hostPlatform;
self = stdenv.mkDerivation {
  pname = "mesa";
  inherit version;

  src = fetchurl {
    urls = [
      "https://archive.mesa3d.org/mesa-${version}.tar.xz"
      "https://mesa.freedesktop.org/archive/mesa-${version}.tar.xz"
      "ftp://ftp.freedesktop.org/pub/mesa/mesa-${version}.tar.xz"
      "ftp://ftp.freedesktop.org/pub/mesa/${version}/mesa-${version}.tar.xz"
      "ftp://ftp.freedesktop.org/pub/mesa/older-versions/${branch}.x/${version}/mesa-${version}.tar.xz"
    ];
    inherit hash;
  };

  patches = [
    ./opencl.patch
  ] ++ lib.optionals stdenv.isDarwin [
    # Reorder things to make it build on Darwin again
    # Submitted upstream: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29592
    # FIXME: remove when merged or otherwise addressed
    ./darwin.patch
  ];

  postPatch = ''
    patchShebangs .

    # The drirc.d directory cannot be installed to $drivers as that would cause a cyclic dependency:
    substituteInPlace src/util/xmlconfig.c --replace \
      'DATADIR "/drirc.d"' '"${placeholder "out"}/share/drirc.d"'
    substituteInPlace src/util/meson.build --replace \
      "get_option('datadir')" "'${placeholder "out"}/share'"
    substituteInPlace src/amd/vulkan/meson.build --replace \
      "get_option('datadir')" "'${placeholder "out"}/share'"

    ${copyRustDeps}
  '';

  outputs = [
    "out" "dev" "drivers"
  ] ++ lib.optionals enableOSMesa [
    "osmesa"
  ] ++ lib.optionals stdenv.isLinux [
    "driversdev"
  ] ++ lib.optionals enableTeflon [
    "teflon"
  ] ++ lib.optionals enableOpenCL [
    "opencl"
  ] ++ lib.optionals haveDozen [
    # the Dozen drivers depend on libspirv2dxil, but link it statically, and
    # libspirv2dxil itself is pretty chonky, so relocate it to its own output in
    # case anything wants to use it at some point
    "spirv2dxil"
  ];

  # Keep build-ids so drivers can use them for caching, etc.
  # Also some drivers segfault without this.
  separateDebugInfo = true;

  # Needed to discover llvm-config for cross
  preConfigure = ''
    PATH=${llvmPackages.libllvm.dev}/bin:$PATH
  '';

  mesonFlags = [
    "--sysconfdir=/etc"
    "--datadir=${placeholder "drivers"}/share" # Vendor files

    # Don't build in debug mode
    # https://gitlab.freedesktop.org/mesa/mesa/blob/master/docs/meson.html#L327
    (lib.mesonBool "b_ndebug" true)

    (lib.mesonOption "dri-search-path" "${libglvnd.driverLink}/lib/dri")

    (lib.mesonOption "platforms" (lib.concatStringsSep "," eglPlatforms))
    (lib.mesonOption "gallium-drivers" (lib.concatStringsSep "," galliumDrivers))
    (lib.mesonOption "vulkan-drivers" (lib.concatStringsSep "," vulkanDrivers))

    (lib.mesonOption "dri-drivers-path" "${placeholder "drivers"}/lib/dri")
    (lib.mesonOption "vdpau-libs-path" "${placeholder "drivers"}/lib/vdpau")
    (lib.mesonOption "omx-libs-path" "${placeholder "drivers"}/lib/bellagio")
    (lib.mesonOption "va-libs-path" "${placeholder "drivers"}/lib/dri")
    (lib.mesonOption "d3d-drivers-path" "${placeholder "drivers"}/lib/d3d")

    (lib.mesonBool "gallium-nine" enableGalliumNine) # Direct3D in Wine
    (lib.mesonBool "osmesa" enableOSMesa) # used by wine
    (lib.mesonBool "teflon" enableTeflon) # TensorFlow frontend
    (lib.mesonEnable "microsoft-clc" false) # Only relevant on Windows (OpenCL 1.2 API on top of D3D12)

    # To enable non-mesa gbm backends to be found (e.g. Nvidia)
    (lib.mesonOption "gbm-backends-path" "${libglvnd.driverLink}/lib/gbm:${placeholder "out"}/lib/gbm")

    # meson auto_features enables these features, but we do not want them
    (lib.mesonEnable "android-libbacktrace" false)
  ] ++ lib.optionals stdenv.isLinux [
    (lib.mesonEnable "glvnd" true)
    (lib.mesonBool "install-intel-clc" true)
    (lib.mesonEnable "intel-rt" stdenv.isx86_64)
    (lib.mesonOption "clang-libdir" "${llvmPackages.clang-unwrapped.lib}/lib")
  ] ++ lib.optionals stdenv.isDarwin [
    # Disable features that are explicitly unsupported on the platform
    (lib.mesonEnable "gbm" false)
    (lib.mesonEnable "xlib-lease" false)
    (lib.mesonEnable "egl" false)
    (lib.mesonEnable "gallium-vdpau" false)
    (lib.mesonEnable "gallium-va" false)
    (lib.mesonEnable "gallium-xa" false)
    (lib.mesonEnable "lmsensors" false)
    # Don’t build with glvnd support to make sure Mesa builds libGL on Darwin
    (lib.mesonEnable "glvnd" false)
    # This gets enabled by mesonAutoFeatures and fails on aarch64-darwin,
    # which makes no sense because Darwin has neither Intel nor RT, but OK
    (lib.mesonEnable "intel-rt" false)
  ] ++ lib.optionals enableOpenCL [
    # Clover, old OpenCL frontend
    (lib.mesonOption "gallium-opencl" "icd")
    (lib.mesonBool "opencl-spirv" true)

    # Rusticl, new OpenCL frontend
    (lib.mesonBool "gallium-rusticl" true)
  ] ++ lib.optionals (!withValgrind) [
    (lib.mesonEnable "valgrind" false)
  ] ++ lib.optionals (!withLibunwind) [
    (lib.mesonEnable "libunwind" false)
  ]
  ++ lib.optionals enablePatentEncumberedCodecs [
    (lib.mesonOption "video-codecs" "all")
  ] ++ lib.optionals (vulkanLayers != []) [
    (lib.mesonOption "vulkan-layers" (builtins.concatStringsSep "," vulkanLayers))
  ] ++ lib.optionals needNativeCLC [
    (lib.mesonOption "intel-clc" "system")
  ];

  strictDeps = true;

  buildInputs = with xorg; [
    expat
    glslang
    libffi
    libglvnd
    libvdpau
    llvmPackages.libllvm
    openssl
    zstd
  ] ++ (with xorg; [
    libX11
    libXext
    libXfixes
    libXrandr
    libXt
    libXvMC
    libpthreadstubs
    libxcb
    libxshmfence
    xcbutilkeysyms
    xorgproto
  ]) ++ lib.optionals withLibunwind [
    libunwind
  ] ++ [
    python3Packages.python # for shebang
  ] ++ lib.optionals haveWayland [
    wayland
    wayland-protocols
  ] ++ lib.optionals stdenv.isLinux [
    libomxil-bellagio
    libva-minimal
    llvmPackages.clang-unwrapped
    llvmPackages.libclc
    lm_sensors
    spirv-llvm-translator
    udev
  ] ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform elfutils) [
    elfutils
  ] ++ lib.optionals enableOpenCL [
    llvmPackages.clang
  ] ++ lib.optionals withValgrind [
    valgrind-light
  ] ++ lib.optionals haveZink [
    vulkan-loader
  ] ++ lib.optionals haveDozen [
    directx-headers
  ];

  depsBuildBuild = [
    pkg-config
  ] ++ lib.optionals (!stdenv.isDarwin) [
    # Adding this unconditionally makes x86_64-darwin pick up an older
    # toolchain, as we explicitly call Mesa with 11.0 stdenv, but buildPackages
    # is still 10.something, and Mesa can't build with that.
    # FIXME: figure this out, or figure out how to get rid of Mesa on Darwin,
    # whichever is easier.
    buildPackages.stdenv.cc
  ];

  nativeBuildInputs = [
    meson
    pkg-config
    ninja
    intltool
    bison
    flex
    file
    python3Packages.python
    python3Packages.packaging
    python3Packages.pycparser
    python3Packages.mako
    python3Packages.ply
    jdupes
    glslang
    rustc
    rust-bindgen
    rust-cbindgen
    rustPlatform.bindgenHook
  ] ++ lib.optionals haveWayland [
    wayland-scanner
  ] ++ lib.optionals needNativeCLC [
    buildPackages.mesa.driversdev
  ];

  disallowedRequisites = lib.optionals needNativeCLC [
    buildPackages.mesa.driversdev
  ];

  propagatedBuildInputs = (with xorg; [
    libXdamage
    libXxf86vm
  ]) ++ lib.optionals withLibdrm [
    libdrm
  ] ++ lib.optionals stdenv.isDarwin [
    OpenGL
    Xplugin
  ];

  doCheck = false;

  postInstall = ''
    # Some installs don't have any drivers so this directory is never created.
    mkdir -p $drivers $osmesa
  '' + lib.optionalString stdenv.isLinux ''
    mkdir -p $drivers/lib

    if [ -n "$(shopt -s nullglob; echo "$out/lib/libxatracker"*)" -o -n "$(shopt -s nullglob; echo "$out/lib/libvulkan_"*)" ]; then
      # move gallium-related stuff to $drivers, so $out doesn't depend on LLVM
      mv -t $drivers/lib       \
        $out/lib/libpowervr_rogue* \
        $out/lib/libxatracker* \
        $out/lib/libvulkan_*
    fi

    if [ -n "$(shopt -s nullglob; echo "$out"/lib/lib*_mesa*)" ]; then
      # Move other drivers to a separate output
      mv -t $drivers/lib $out/lib/lib*_mesa*
    fi

    # Update search path used by glvnd
    for js in $drivers/share/glvnd/egl_vendor.d/*.json; do
      substituteInPlace "$js" --replace '"libEGL_' '"'"$drivers/lib/libEGL_"
    done

    # Update search path used by Vulkan (it's pointing to $out but
    # drivers are in $drivers)
    for js in $drivers/share/vulkan/icd.d/*.json; do
      substituteInPlace "$js" --replace "$out" "$drivers"
    done
  '' + lib.optionalString enableOpenCL ''
    # Move OpenCL stuff
    mkdir -p $opencl/lib
    mv -t "$opencl/lib/"     \
      $out/lib/gallium-pipe   \
      $out/lib/lib*OpenCL*

    # We construct our own .icd files that contain absolute paths.
    mkdir -p $opencl/etc/OpenCL/vendors/
    echo $opencl/lib/libMesaOpenCL.so > $opencl/etc/OpenCL/vendors/mesa.icd
    echo $opencl/lib/libRusticlOpenCL.so > $opencl/etc/OpenCL/vendors/rusticl.icd
  '' + lib.optionalString enableOSMesa ''
    # move libOSMesa to $osmesa, as it's relatively big
    mkdir -p $osmesa/lib
    mv -t $osmesa/lib/ $out/lib/libOSMesa*
  '' + lib.optionalString (vulkanLayers != []) ''
    mv -t $drivers/lib $out/lib/libVkLayer*
    for js in $drivers/share/vulkan/{im,ex}plicit_layer.d/*.json; do
      substituteInPlace "$js" --replace '"libVkLayer_' '"'"$drivers/lib/libVkLayer_"
    done
  '' + lib.optionalString haveDozen ''
    mkdir -p $spirv2dxil/{bin,lib}
    mv -t $spirv2dxil/lib $out/lib/libspirv_to_dxil*
    mv -t $spirv2dxil/bin $out/bin/spirv2dxil
  '';

  postFixup = lib.optionalString stdenv.isLinux ''


    # set the default search path for DRI drivers; used e.g. by X server
    for pc in lib/pkgconfig/{dri,d3d}.pc; do
      [ -f "$dev/$pc" ] && substituteInPlace "$dev/$pc" --replace "$drivers" "${libglvnd.driverLink}"
    done

    # remove pkgconfig files for GL/EGL; they are provided by libGL.
    rm -f $dev/lib/pkgconfig/{gl,egl}.pc

    # Move development files for libraries in $drivers to $driversdev
    mkdir -p $driversdev/include
    mv $dev/include/xa_* $dev/include/d3d* -t $driversdev/include || true
    mkdir -p $driversdev/lib/pkgconfig
    for pc in lib/pkgconfig/{xatracker,d3d}.pc; do
      if [ -f "$dev/$pc" ]; then
        substituteInPlace "$dev/$pc" --replace $out $drivers
        mv $dev/$pc $driversdev/$pc
      fi
    done

    moveToOutput bin/intel_clc $driversdev

    # Don't depend on build python
    patchShebangs --host --update $out/bin/*\

    # NAR doesn't support hard links, so convert them to symlinks to save space.
    jdupes --hard-links --link-soft --recurse "$drivers"

    # add RPATH so the drivers can find the moved libgallium and libdricore9
    # moved here to avoid problems with stripping patchelfed files
    for lib in $drivers/lib/*.so* $drivers/lib/*/*.so*; do
      if [[ ! -L "$lib" ]]; then
        patchelf --set-rpath "$(patchelf --print-rpath $lib):$drivers/lib" "$lib"
      fi
    done
    # add RPATH here so Zink can find libvulkan.so
    ${lib.optionalString haveZink ''
      patchelf --add-rpath ${vulkan-loader}/lib $drivers/lib/dri/zink_dri.so
    ''}

    ${lib.optionalString enableTeflon ''
      moveToOutput lib/libteflon.so $teflon
    ''}

		# XXX: test hack -KA
    ln -sr $drivers/lib/dri/apple_dri.so $drivers/lib/dri/adp_dri.so

  '';

  env.NIX_CFLAGS_COMPILE = toString (
    lib.optionals stdenv.isDarwin [
      "-fno-common"
    ] ++ lib.optionals enableOpenCL [
      "-UPIPE_SEARCH_DIR"
      "-DPIPE_SEARCH_DIR=\"${placeholder "opencl"}/lib/gallium-pipe\""
  ]);

  passthru = {
    inherit (libglvnd) driverLink;
    inherit llvmPackages;

    libdrm = if withLibdrm then libdrm else null;

    tests = lib.optionalAttrs stdenv.isLinux {
      devDoesNotDependOnLLVM = stdenv.mkDerivation {
        name = "mesa-dev-does-not-depend-on-llvm";
        buildCommand = ''
          echo ${self.dev} >>$out
        '';
        disallowedRequisites = [ llvmPackages.llvm self.drivers ];
      };
    };
  };

  meta = {
    description = "Open source 3D graphics library";
    longDescription = ''
      The Mesa project began as an open-source implementation of the OpenGL
      specification - a system for rendering interactive 3D graphics. Over the
      years the project has grown to implement more graphics APIs, including
      OpenGL ES (versions 1, 2, 3), OpenCL, OpenMAX, VDPAU, VA API, XvMC, and
      Vulkan.  A variety of device drivers allows the Mesa libraries to be used
      in many different environments ranging from software emulation to
      complete hardware acceleration for modern GPUs.
    '';
    homepage = "https://www.mesa3d.org/";
    changelog = "https://www.mesa3d.org/relnotes/${version}.html";
    license = with lib.licenses; [ mit ]; # X11 variant, in most files
    platforms = [
      "i686-linux" "x86_64-linux" "x86_64-darwin" "armv5tel-linux"
      "armv6l-linux" "armv7l-linux" "armv7a-linux" "aarch64-linux"
      "powerpc64-linux" "powerpc64le-linux" "aarch64-darwin" "riscv64-linux"
    ];
    badPlatforms = []; # Load bearing for libGL meta on Darwin.
    maintainers = with lib.maintainers; [ primeos vcunat ]; # Help is welcome :)
  };
};

in self
