lsfg-vk(-ui): sync up with nixpkgs pr

submodules make a difference, whoops. stuff worked on my side because the repo got cached with the submodules included

README.md

@@ -1,11 +1,70 @@
 # lsfg-vk-flake
-WIP! Nix flake to build the library for using Lossless Scaling's frame generation on Linux
+Nix flake for using [Lossless Scaling's frame generation on Linux](https://github.com/PancakeTAS/lsfg-vk)
 
-current state: builds and seems to be functional
+>[!IMPORTANT]
+> You need to have Lossless Scaling installed on Steam!
+> In case it is not installed on the default Steam drive, you may want to consider setting the correct path in the lsfg-vk config.
 
-## manual install
-1. build the library with ``nix build``
-2. copy library and vulkan layer config to your ~/.local: ``cp -r result/* ~/.local/`` (check contents of result first!)
-3. have lossless scaling installed on Steam or manually reference the DLL file using LSFG_DLL_PATH
+## Installation
+### System-wide (NixOS module)
+This approach will install an implicit layer to ``/etc/vulkan/implicit_layer.d/``
 
-example usage command: ``LD_PRELOAD=~/.local/lib/liblsfg-vk.so LSFG_DLL_PATH=<POINT_ME_TO>/Lossless.dll ENABLE_LSFG=1 vkcube``
+Add this to your flake inputs, output function and modules list:
+```nix
+inputs = {
+  ...
+  lsfg-vk-flake.url = "github:pabloaul/lsfg-vk-flake/main";
+  lsfg-vk-flake.inputs.nixpkgs.follows = "nixpkgs";
+}
+
+outputs = {nixpkgs, lsfg-vk-flake, ...}: {
+
+  nixosConfigurations.hostname = nixpkgs.lib.nixosSystem {
+    ...
+    modules = [
+      ...
+      lsfg-vk-flake.nixosModules.default
+    ];
+  };
+}
+```
+
+And then enable this in your system config:
+```nix 
+services.lsfg-vk = {
+  enable = true;
+  ui.enable = true; # installs gui for configuring lsfg-vk
+};
+```
+
+### User install (manual)
+1. Build the library:
+  ```bash
+  nix build
+  ```
+2. Create the following path in case it does not exist:
+  ```bash
+  mkdir -p $HOME/.local/share/vulkan/implicit_layer.d
+  ```
+3. Symlink the build results to your $HOME/.local/
+  ```bash
+  cp -ifrsv "$(readlink -f ./result)"/* $HOME/.local/
+  ```
+
+## Usage
+Run a Vulkan application with the environment variable ``ENABLE_LSFG=1`` set.
+
+Example:
+```bash
+ENABLE_LSFG=1 vkcube
+```
+
+To confirm that it is working, look for output like this in the terminal: lsfg-vk(...): ...
+
+You can also enable it per game on Steam by adding this to the launch options: 
+```
+ENABLE_LSFG=1 %COMMAND%
+```
+
+>[!NOTE]
+> If the environment variable is set but the program doesn't show any lsfg-vk output, you may need to add the application to your lsfg-vk configuration file at `~/.config/lsfg-vk/config.toml`. Read more about it in the [Wiki](https://github.com/PancakeTAS/lsfg-vk/wiki/Configuring-lsfg-vk)

default.nix

@@ -1,47 +0,0 @@
-{ lib
-, fetchFromGitHub
-, cmake
-, ninja
-, vulkan-headers
-, vulkan-loader
-, llvmPackages
-, spirv-headers
-}: let
-
-in llvmPackages.stdenv.mkDerivation {
-  pname = "lsfg-vk";
-  version = "unstable-2025-07-13-f998647";
-
-  src = fetchFromGitHub {
-    owner = "PancakeTAS";
-    repo = "lsfg-vk";
-    rev = "f998647d74051467e39de9de2df2ff9a5996db5f";
-    hash = "sha256-X708aKFz3wqSVYsMvCKsY7kqi+2LTewnoOMrXFPVEPY=";
-    fetchSubmodules = true;
-  };
-
-  cmakeFlags = [
-    "-DCMAKE_BUILD_TYPE=Release"
-  ];
-
-  nativeBuildInputs = [
-    # clang-tools needs to come before clang so it can locate Vulkan headers correctly
-    llvmPackages.clang-tools
-    llvmPackages.clang
-    llvmPackages.libllvm # needed for release builds
-    cmake
-    ninja
-  ];
-
-  buildInputs = [
-    vulkan-headers
-    vulkan-loader
-    spirv-headers
-  ];
-
-  meta = with lib; {
-    homepage = "https://github.com/PancakeTAS/lsfg-vk/";
-    license = licenses.mit;
-    platforms = platforms.linux;
-  };
-}

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1751792365,
-        "narHash": "sha256-J1kI6oAj25IG4EdVlg2hQz8NZTBNYvIS0l4wpr9KcUo=",
+        "lastModified": 1753694789,
+        "narHash": "sha256-cKgvtz6fKuK1Xr5LQW/zOUiAC0oSQoA9nOISB0pJZqM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1fd8bada0b6117e6c7eb54aad5813023eed37ccb",
+        "rev": "dc9637876d0dcc8c9e5e22986b857632effeb727",
         "type": "github"
       },
       "original": {

flake.nix

@@ -1,10 +1,17 @@
 {
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
-  outputs = { nixpkgs, ... }: let
-    system = "x86_64-linux";
-    pkgs = import nixpkgs { inherit system; };
-  in {
-    packages.${system}.default = pkgs.callPackage ./default.nix {};
+  outputs = { nixpkgs, ... }: 
+  let
+    forAllSystems = nixpkgs.lib.genAttrs [ "x86_64-linux" "aarch64-linux" ];
+  in 
+  {
+    packages = forAllSystems (system: { 
+      default = nixpkgs.legacyPackages.${system}.callPackage ./lsfg-vk.nix { };
+      lsfg-vk = nixpkgs.legacyPackages.${system}.callPackage ./lsfg-vk.nix { };
+      lsfg-vk-ui = nixpkgs.legacyPackages.${system}.callPackage ./lsfg-vk-ui.nix { };
+    });
+
+    nixosModules.default = import ./module.nix;
   };
 }

lsfg-vk-ui.nix

@@ -0,0 +1,54 @@
+{
+  lib,
+  fetchFromGitHub,
+  rustPlatform,
+  pkg-config,
+  glib,
+  pango,
+  gdk-pixbuf,
+  gtk4,
+  libadwaita,
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "lsfg-vk-ui";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "PancakeTAS";
+    repo = "lsfg-vk";
+    tag = "v${version}";
+    hash = "sha256-nIyVOil/gHC+5a+sH3vMlcqVhixjJaGWqXbyoh2Nqyw=";
+  };
+
+  cargoHash = "sha256-hIQRS/egIDU5Vu/1KWHtpt4S26h+9GadVr+lBAG2LDg=";
+
+  sourceRoot = "source/ui";
+
+  nativeBuildInputs = [
+    pkg-config
+    glib
+  ];
+
+  buildInputs = [
+    pango
+    gdk-pixbuf
+    gtk4
+    libadwaita
+  ];
+
+  postInstall = ''
+    install -Dm444 $src/ui/rsc/gay.pancake.lsfg-vk-ui.desktop $out/share/applications/gay.pancake.lsfg-vk-ui.desktop
+    install -Dm444 $src/ui/rsc/icon.png $out/share/icons/hicolor/256x256/apps/gay.pancake.lsfg-vk-ui.png
+  '';
+
+  meta = {
+    description = "Graphical configuration interface for lsfg-vk";
+    homepage = "https://github.com/PancakeTAS/lsfg-vk/";
+    changelog = "https://github.com/PancakeTAS/lsfg-vk/releases/tag/${src.tag}";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.linux;
+    maintainers = with lib.maintainers; [ pabloaul ];
+    mainProgram = "lsfg-vk-ui";
+  };
+}

lsfg-vk.nix

@@ -0,0 +1,44 @@
+{
+  lib,
+  fetchFromGitHub,
+  cmake,
+  vulkan-headers,
+  llvmPackages,
+}:
+
+llvmPackages.stdenv.mkDerivation rec {
+  pname = "lsfg-vk";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "PancakeTAS";
+    repo = "lsfg-vk";
+    tag = "v${version}";
+    hash = "sha256-hWpuPH7mKbeMaLaRUwtlkNLy4lOnJEe+yd54L7y2kV0=";
+    fetchSubmodules = true;
+  };
+
+  postPatch = ''
+    substituteInPlace VkLayer_LS_frame_generation.json \
+      --replace-fail "liblsfg-vk.so" "$out/lib/liblsfg-vk.so"
+  '';
+
+  nativeBuildInputs = [
+    llvmPackages.clang-tools
+    llvmPackages.libllvm
+    cmake
+  ];
+
+  buildInputs = [
+    vulkan-headers
+  ];
+
+  meta = {
+    description = "Vulkan layer for frame generation (Requires owning Lossless Scaling)";
+    homepage = "https://github.com/PancakeTAS/lsfg-vk/";
+    changelog = "https://github.com/PancakeTAS/lsfg-vk/releases/tag/${src.tag}";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.linux;
+    maintainers = with lib.maintainers; [ pabloaul ];
+  };
+}

module.nix

@@ -0,0 +1,69 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.services.lsfg-vk;
+  lsfg-vk = pkgs.callPackage ./lsfg-vk.nix { };
+  lsfg-vk-ui = pkgs.callPackage ./lsfg-vk-ui.nix { };
+in
+{
+  options = {
+    services.lsfg-vk = {
+      enable = lib.mkEnableOption "Lossless Scaling Frame Generation Vulkan layer";
+
+      ui.enable = lib.mkEnableOption "Enables a GUI for configuring lsfg-vk";
+
+      package = lib.mkOption {
+        type = lib.types.package;
+        description = "The lsfg-vk package to use";
+        default = lsfg-vk;
+      };
+
+      losslessDLLFile = lib.mkOption {
+        type = with lib.types; nullOr str;
+        default = null;
+        example = "/home/user/games/Lossless Scaling/Lossless.dll";
+        description = ''
+          Sets the LSFG_DLL_PATH environment variable.
+          Required if Lossless Scaling isn't installed in a standard location
+        '';
+      };
+
+      configFile = lib.mkOption {
+        type = with lib.types; nullOr str;
+        default = null;
+        example = "/home/user/.config/lsfg-vk/conf.toml";
+        description = ''
+          Sets the LSFG_CONFIG environment variable.
+          Required if the lsfg-vk configuration file isn't stored at the standard location
+        '';
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable (
+    lib.mkMerge [
+      {
+        environment.systemPackages = [ cfg.package ];
+
+        # Installs the Vulkan implicit layer system-wide
+        environment.etc."vulkan/implicit_layer.d/VkLayer_LS_frame_generation.json".source =
+          "${cfg.package}/share/vulkan/implicit_layer.d/VkLayer_LS_frame_generation.json";
+      }
+      (lib.mkIf cfg.ui.enable {
+        environment.systemPackages = [ lsfg-vk-ui ];
+      })
+      (lib.mkIf (cfg.losslessDLLFile != null) {
+        environment.sessionVariables.LSFG_DLL_PATH =
+          lib.warn "losslessDLLFile is deprecated and will only be used by lsfg-vk if LSFG_LEGACY is set."
+          cfg.losslessDLLFile;
+      })
+      (lib.mkIf (cfg.configFile != null) {
+        environment.sessionVariables.LSFG_CONFIG = cfg.configFile;
+      })
+    ]
+  );
+}