gl-gsync-demo: init at 2020-12-27

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

pkgs/games/gl-gsync-demo/default.nix

@@ -0,0 +1,38 @@
+{ stdenv, fetchFromGitHub, libX11, freeglut, glew, libXNVCtrl, libXext, lib }:
+
+stdenv.mkDerivation rec {
+  pname = "gl-gsync-demo";
+  version = "unstable-2020-12-27";
+
+  src = fetchFromGitHub {
+    owner = "dahenry";
+    repo = "gl-gsync-demo";
+    rev = "4fd963a8ad880dc2d846394c8c80b2091a119591";
+    sha256 = "1innsmpsd9n9ih80v16rhj2ijrl28jd7x6a4jmxdirba7mjibm8d";
+  };
+
+  buildInputs = [ libX11 freeglut glew libXNVCtrl libXext ];
+
+  installPhase = ''
+    runHook preInstall
+
+    install -D gl-gsync-demo -t $out/bin/
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    license = with licenses; mit;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ atemu ];
+    description = "A very basic OpenGL demo for testing NVIDIA's G-SYNC technology on Linux";
+    longDescription = ''
+      The demo simply draws a vertical bar moving accross the screen at constant speed, but deliberately rendered at a variable frame rate.
+
+      The min and max frame rates can be manually changed at runtime, by step of 10 fps and with a min of 10 fps.
+
+      The demo also allows to toggle V-Sync on/off.
+    '';
+    homepage = "https://github.com/dahenry/gl-gsync-demo";
+  };
+}

pkgs/top-level/all-packages.nix

@@ -29401,6 +29401,10 @@ with pkgs;
 
   gltron = callPackage ../games/gltron { };
 
+  gl-gsync-demo = callPackage ../games/gl-gsync-demo {
+    libXNVCtrl = linuxPackages.nvidia_x11.settings.libXNVCtrl;
+  };
+
   gmad = callPackage ../games/gmad { };
 
   gnonograms = callPackage ../games/gnonograms { };