From bb5b8d73c4b45a675dcd7244133f9859d9f31877 Mon Sep 17 00:00:00 2001
From: materus <materus@podkos.pl>
Date: Fri, 21 Jul 2023 03:13:51 +0200
Subject: [PATCH] swiftshader: init package | obs-studio: use swiftshader

---
 pkgs/apps/obs/default.nix |  6 +++++-
 pkgs/default.nix          |  4 +++-
 pkgs/libs/swiftshader.nix | 29 +++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 2 deletions(-)
 create mode 100644 pkgs/libs/swiftshader.nix

diff --git a/pkgs/apps/obs/default.nix b/pkgs/apps/obs/default.nix
index bdb8cf6..2f7a3f3 100644
--- a/pkgs/apps/obs/default.nix
+++ b/pkgs/apps/obs/default.nix
@@ -47,6 +47,8 @@
 , websocketpp
 , amf-headers 
 , libGL
+, vulkan-loader
+, swiftshader
 }:
 
 let
@@ -107,6 +109,7 @@ stdenv.mkDerivation rec {
     libva
     srt
     qtwayland
+    swiftshader
   ]
   ++ optionals scriptingSupport [ luajit python3 ]
   ++ optional alsaSupport alsa-lib
@@ -120,6 +123,7 @@ stdenv.mkDerivation rec {
       cp -r $i cef/Release/
       cp -r $i cef/Resources/
     done
+    cp -r ${swiftshader}/lib/libvk_swiftshader.so cef/Release/
     cp -r ${libcef}/lib/libcef.so cef/Release/
     cp -r ${libcef}/lib/libcef_dll_wrapper.a cef/libcef_dll_wrapper/
     cp -r ${libcef}/include cef/
@@ -142,7 +146,7 @@ stdenv.mkDerivation rec {
   preFixup = ''
     qtWrapperArgs+=(
       --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ xorg.libX11 libvlc ]}"
-      --suffix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ libGL ]}"
+      --suffix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ libGL vulkan-loader ]}"
       --prefix LD_LIBRARY_PATH : "$out/lib"
       ''${gappsWrapperArgs[@]}
     )
diff --git a/pkgs/default.nix b/pkgs/default.nix
index bede4cc..209014c 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -15,11 +15,13 @@ rec {
       VideoDecodeAcceleration VideoToolbox;
   };
 
-  obs-amf = pkgs.qt6Packages.callPackage ./apps/obs { ffmpeg = ffmpeg6-amf-full; };
+  obs-amf = pkgs.qt6Packages.callPackage ./apps/obs { ffmpeg = ffmpeg6-amf-full; inherit swiftshader;};
 
   polymc = pkgs.qt6Packages.callPackage ./apps/games/polymc {};
 
   vpk_fuse = callPackage ./apps/vpk_fuse.nix {};
 
+  swiftshader = callPackage ./libs/swiftshader.nix {};
+
 
 }
diff --git a/pkgs/libs/swiftshader.nix b/pkgs/libs/swiftshader.nix
new file mode 100644
index 0000000..bb436e4
--- /dev/null
+++ b/pkgs/libs/swiftshader.nix
@@ -0,0 +1,29 @@
+{ pkgs, lib, stdenv, fetchFromGitHub, cmake, python3 }:
+
+
+stdenv.mkDerivation rec {
+  pname = "swiftshader";
+  version = "20072023";
+  src = fetchFromGitHub {
+    owner = "google";
+    repo = "SwiftShader";
+    rev = "4a260c12b8c155103435a7b2b99b5227f6ce7594";
+    sha256 = "sha256-WcA1EazeuRlFhIaAKgJHp+rUkCR2vqcINkTMYOgrbNI=";
+    fetchSubmodules = true;
+  };
+
+  buildInputs = [ cmake python3 ];
+
+  installPhase = ''
+    mkdir -p $out/lib
+    mv libvk_swiftshader.so $out/lib
+  '';
+
+
+  meta = with lib; {
+    description = "SwiftShader is a high-performance CPU-based implementation of the Vulkan 1.3 graphics API";
+    homepage = "https://swiftshader.googlesource.com/SwiftShader";
+    license = licenses.asl20;
+    platforms = platforms.linux;
+  };
+}