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nix: add a vulkan option and enable xcb QT platform by default #2060

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nix: add a vulkan option and enable xcb QT platform by default #2060

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4 changes: 3 additions & 1 deletion flake.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@
...
}:
{
packages = {
packages = rec {
glad = pkgs.callPackage ./nix/glad.nix { };
etc2comp = pkgs.callPackage ./nix/etc2comp.nix { };

Expand Down Expand Up @@ -52,6 +52,8 @@
libv8 = pkgs.nodejs_22.libv8;
};

overte-full-vulkan = overte-full.override { renderingBackend = "Vulkan"; };

# TODO: update/remove when overte updates to more modern version
draco = pkgs.callPackage ./nix/draco.nix { };

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17 changes: 15 additions & 2 deletions nix/overte.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,9 @@
libopus,
libsForQt5,
libv8,
vulkan-loader,
vulkan-headers,
vulkan-memory-allocator,

# tools for shader compilation
scribe,
Expand All @@ -43,9 +46,13 @@
buildClient ? true,
buildServer ? true,
buildTools ? false,
renderingBackend ? "OpenGL",
}:

assert renderingBackend == "OpenGL" || renderingBackend == "Vulkan";

stdenv.mkDerivation {
pname = "overte";
pname = "overte-${lib.toLower renderingBackend}";

@RTUnreal RTUnreal Feb 4, 2026

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maybe leave the opengl rendering to overte and make vulkan overte-vulkan

version = "unstable";
src =
let
Expand Down Expand Up @@ -122,11 +129,16 @@ stdenv.mkDerivation {
SDL2
libopus
libv8
];
] ++ (lib.optionals (renderingBackend == "Vulkan") [
vulkan-loader
vulkan-headers

@RTUnreal RTUnreal Feb 4, 2026

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should that not be in the nativeBuildInputs?

vulkan-memory-allocator
]);

cmakeFlags = [
"-DOVERTE_USE_SYSTEM_LIBS=ON"
"-DOVERTE_BUILD_TYPE=NIGHLTY"
"-DOVERTE_RENDERING_BACKEND=${renderingBackend}"
]
++ lib.optional (!buildClient) "-DOVERTE_BUILD_CLIENT=OFF"
++ lib.optional (!buildServer) "-DOVERTE_BUILD_SERVER=OFF"
Expand Down Expand Up @@ -163,6 +175,7 @@ stdenv.mkDerivation {
ln -s "$I"/interface $out/bin/overte-client
makeWrapper "$I"/interface $out/bin/overte-client \
--unset QT_PLUGIN_PATH \
--set-default QT_QPA_PLATFORM xcb \
"''${qtWrapperArgs[@]}"
''
)
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