Mesa
Mesa is an open source implementation of several graphics APIs including OpenGL and Vulkan.
Enabling Vulkan Layers
Vulkan Layers are not enabled by default in Nixpkgs. You can override the existing Mesa packages and specify them in config.hardware.opengl
.
hardware = {
opengl =
let
fn = oa: {
nativeBuildInputs = oa.nativeBuildInputs ++ [ pkgs.glslang ];
mesonFlags = oa.mesonFlags ++ [ "-Dvulkan-layers=device-select,overlay" ];
# patches = oa.patches ++ [ ./mesa-vulkan-layer-nvidia.patch ]; See below
postInstall = oa.postInstall + ''
mv $out/lib/libVkLayer* $drivers/lib
#Device Select layer
layer=VkLayer_MESA_device_select
substituteInPlace $drivers/share/vulkan/implicit_layer.d/''${layer}.json \
--replace "lib''${layer}" "$drivers/lib/lib''${layer}"
#Overlay layer
layer=VkLayer_MESA_overlay
substituteInPlace $drivers/share/vulkan/explicit_layer.d/''${layer}.json \
--replace "lib''${layer}" "$drivers/lib/lib''${layer}"
'';
};
in
with pkgs; {
enable = true;
driSupport32Bit = true;
package = (mesa.overrideAttrs fn).drivers;
package32 = (pkgsi686Linux.mesa.overrideAttrs fn).drivers;
};
Nvidia users may need to apply this patch for the Device Select
layer to work.
diff b/src/vulkan/device-select-layer/device_select_layer.c a/src/vulkan/device-select-layer/device_select_layer.c
--- b/src/vulkan/device-select-layer/device_select_layer.c
+++ a/src/vulkan/device-select-layer/device_select_layer.c
@@ -454,12 +454,8 @@
exit(0);
} else {
unsigned selected_index = get_default_device(info, selection, physical_device_count, physical_devices);
- selected_physical_device_count = physical_device_count;
+ selected_physical_device_count = 1;
selected_physical_devices[0] = physical_devices[selected_index];
- for (unsigned i = 0; i < physical_device_count - 1; ++i) {
- unsigned this_idx = i < selected_index ? i : i + 1;
- selected_physical_devices[i + 1] = physical_devices[this_idx];
- }
}
if (selected_physical_device_count == 0) {
Default drivers
In case you wonder where does ["auto"]
in mesa's attributes lead you, this might be another way to see them (for 22.3.0[1]):
, galliumDrivers ?
# Search for `gallium_drivers.contains('auto')` in meson.build
if stdenv.isLinux then
if stdenv.isi686 || stdenv.isx86_64 then ["r300" "r600" "radeonsi" "nouveau" "virgl" "svga" "swrast" "iris" "crocus" "i915"]
else if stdenv.isAarch64 then ["v3d" "vc4" "freedreno" "etnaviv" "nouveau" "svga" "tegra" "virgl" "lima" "panfrost" "swrast"]
else throw "Unsupported platform: this derivation only supports i686/x86_64/aarch64"
else if stdenv.isDarwin then ["swrast"]
else throw "Unsupported platform: this derivation only supports Linux/Darwin"
, vulkanDrivers ?
# Search for `_vulkan_drivers.contains('auto')` in meson.build
if stdenv.isLinux then
if stdenv.isi686 || stdenv.isx86_64 then ["amd" "intel" "intel_hasvk" "swrast"]
else if stdenv.isAarch64 || stdenv.isArch32 then ["swrast"]
else throw "Unsupported platform: this derivation only supports i686/x86_64/aarch64"
else if stdenv.isDarwin then []
else throw "Unsupported platform: this derivation only supports Linux/Darwin"