Merge pull request #4 from exalexi/main

module.nix: add configFile option

README.md

@@ -9,7 +9,7 @@ Nix flake for using [Lossless Scaling's frame generation on Linux](https://githu
 ### System-wide (NixOS module)
 This approach will install an implicit layer to ``/etc/vulkan/implicit_layer.d/``
 
-Add this repository to your flake inputs, output function and module list:
+Add this to your flake inputs, output function and modules list:
 ```nix
 inputs = {
   ...
@@ -29,25 +29,39 @@ outputs = {nixpkgs, lsfg-vk-flake, ...}: {
 }
 ```
 
-And then you should be able to enable this in your system config using:
+And then enable this in your system config:
 ```nix 
 services.lsfg-vk.enable = true;
 ```
 
 ### User install (manual)
 1. Build the library:
-  ``nix build``
+  ```bash
-3. Create the following path in case it does not exist:
+  nix build
-  ``mkdir -p $HOME/.local/share/vulkan/implicit_layer.d`` 
+  ```
+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 $HOME/.local/
-  ``cp -ifrsv "$(readlink -f ./result)"/* $HOME/.local/``
+  ```bash
+  cp -ifrsv "$(readlink -f ./result)"/* $HOME/.local/
+  ```
 
 ## Usage
 Run a Vulkan application with the environment variable ``ENABLE_LSFG=1`` set.
 
-Example: ``ENABLE_LSFG=1 vkcube`` and look for output like this in the terminal: lsfg-vk(...): ...
+Example:
+```bash
+ENABLE_LSFG=1 vkcube
+```
 
-You can also enable it per game on Steam by adding this to the launch options of a game like this: 
+To confirm that it is working, look for output like this in the terminal: lsfg-vk(...): ...
-  ``ENABLE_LSFG=1 %COMMAND%``
 
-There are many more options that can be set. Consult the original repository for further documentation.
+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

@@ -13,17 +13,21 @@
   libXcursor,
   libXi,
   libglvnd,
+  libxkbcommon,
+  wayland-scanner,
+  pkg-config,
+  wayland,
 }:
 
 llvmPackages.stdenv.mkDerivation {
   pname = "lsfg-vk";
-  version = "unstable-2025-07-18-53b4438";
+  version = "unstable-2025-07-19-dd5190a";
 
   src = fetchFromGitHub {
     owner = "PancakeTAS";
     repo = "lsfg-vk";
-    rev = "53b4438a2a567c26d739c856329c1a4d13aa1968";
+    rev = "dd5190aa680a7543143e724a100bd5d6e9898dd7";
-    hash = "sha256-Ze4PBu3W7wKbYAMwQIdV2LBI8xWpYWvNJ3qIId2ByPU=";
+    hash = "sha256-2WrUtjUG8l3tSElDYfhvi4lrFUG1Oh5M7DAEX2mFh5s=";
     fetchSubmodules = true;
   };
 
@@ -38,6 +42,8 @@ llvmPackages.stdenv.mkDerivation {
     llvmPackages.libllvm # needed for release builds
     cmake
     ninja
+    wayland-scanner
+    pkg-config
   ];
 
   buildInputs = [
@@ -50,6 +56,8 @@ llvmPackages.stdenv.mkDerivation {
     libXcursor
     libXi
     libglvnd
+    libxkbcommon
+    wayland
   ];
 
   meta = with lib; {

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1751792365,
+        "lastModified": 1752687322,
-        "narHash": "sha256-J1kI6oAj25IG4EdVlg2hQz8NZTBNYvIS0l4wpr9KcUo=",
+        "narHash": "sha256-RKwfXA4OZROjBTQAl9WOZQFm7L8Bo93FQwSJpAiSRvo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1fd8bada0b6117e6c7eb54aad5813023eed37ccb",
+        "rev": "6e987485eb2c77e5dcc5af4e3c70843711ef9251",
         "type": "github"
       },
       "original": {

module.nix

@@ -31,6 +31,17 @@ in
               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
+            '';
+          };
     };
   };
 
@@ -42,5 +53,7 @@ in
       "${cfg.package}/share/vulkan/implicit_layer.d/VkLayer_LS_frame_generation.json";
 
     environment.sessionVariables.LSFG_DLL_PATH = lib.mkIf (cfg.losslessDLLFile != null) cfg.losslessDLLFile;
+
+    environment.sessionVariables.LSFG_CONFIG = lib.mkIf (cfg.configFile != null) cfg.configFile;
   };
 }