Nix: add XWayland hidpi option

.github/workflows/nix-build.yaml

@@ -5,6 +5,11 @@ jobs:
   nix:
     name: "Build Hyprland (Nix)"
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        package:
+        - default
+        - hyprland-no-hidpi
     steps:
     - name: Clone repository
       uses: actions/checkout@v3
@@ -22,4 +27,4 @@ jobs:
         name: hyprland
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
     - name: Build Hyprland with default settings
-      run: nix build --print-build-logs
+      run: nix build .#${{ matrix.package }} --print-build-logs

flake.nix

@@ -32,12 +32,15 @@
         version = mkDate (inputs.wlroots.lastModifiedDate or "19700101");
         src = inputs.wlroots;
       });
+
       hyprland = prev.callPackage ./nix/default.nix {
         stdenv = prev.gcc12Stdenv;
         version = "0.11.1beta" + "+date=" + (mkDate (self.lastModifiedDate or "19700101")) + "_" + (self.shortRev or "dirty");
         wlroots = wlroots-hyprland;
       };
       hyprland-debug = hyprland.override {debug = true;};
+      hyprland-no-hidpi = hyprland.override {hidpiXWayland = false;};
+
       waybar-hyprland = prev.waybar.overrideAttrs (oldAttrs: {
         mesonFlags = oldAttrs.mesonFlags ++ ["-Dexperimental=true"];
       });

nix/default.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   pkg-config,
   meson,
   ninja,
@@ -21,78 +22,88 @@
   xwayland,
   debug ? false,
   enableXWayland ? true,
+  hidpiXWayland ? true,
   legacyRenderer ? false,
   version ? "git",
-}:
-stdenv.mkDerivation {
-  pname = "hyprland" + lib.optionalString debug "-debug";
-  inherit version;
+}: let
+  assertXWayland = lib.assertMsg (hidpiXWayland -> enableXWayland) ''
+    Hyprland: cannot have hidpiXWayland when enableXWayland is false.
+  '';
+in
+  assert assertXWayland;
+    stdenv.mkDerivation {
+      pname = "hyprland" + lib.optionalString debug "-debug";
+      inherit version;
 
-  src = lib.cleanSourceWith {
-    filter = name: type: let
-      baseName = baseNameOf (toString name);
-    in
-      ! (
-        lib.hasSuffix ".nix" baseName
-      );
-    src = lib.cleanSource ../.;
-  };
+      src = lib.cleanSourceWith {
+        filter = name: type: let
+          baseName = baseNameOf (toString name);
+        in
+          ! (
+            lib.hasSuffix ".nix" baseName
+          );
+        src = lib.cleanSource ../.;
+      };
 
-  nativeBuildInputs = [
-    meson
-    ninja
-    pkg-config
-  ];
+      nativeBuildInputs = [
+        meson
+        ninja
+        pkg-config
+      ];
 
-  outputs = [
-    "out"
-    "man"
-  ];
+      outputs = [
+        "out"
+        "man"
+      ];
 
-  buildInputs =
-    [
-      git
-      libdrm
-      libinput
-      libxcb
-      libxkbcommon
-      mesa
-      pango
-      wayland
-      wayland-protocols
-      wayland-scanner
-      (wlroots.override {inherit enableXWayland;})
-      xcbutilwm
-    ]
-    ++ lib.optional enableXWayland xwayland;
+      buildInputs =
+        [
+          git
+          libdrm
+          libinput
+          libxcb
+          libxkbcommon
+          mesa
+          pango
+          wayland
+          wayland-protocols
+          wayland-scanner
+          (
+            if hidpiXWayland
+            then (import ./hidpi_wlroots.nix {inherit wlroots xwayland fetchpatch;})
+            else wlroots.override {inherit enableXWayland;}
+          )
+          xcbutilwm
+        ]
+        ++ lib.optional enableXWayland xwayland;
 
-  mesonBuildType =
-    if debug
-    then "debug"
-    else "release";
+      mesonBuildType =
+        if debug
+        then "debug"
+        else "release";
 
-  mesonFlags = builtins.concatLists [
-    (lib.optional (!enableXWayland) "-Dxwayland=disabled")
-    (lib.optional legacyRenderer "-DLEGACY_RENDERER:STRING=true")
-  ];
+      mesonFlags = builtins.concatLists [
+        (lib.optional (!enableXWayland) "-Dxwayland=disabled")
+        (lib.optional legacyRenderer "-DLEGACY_RENDERER:STRING=true")
+      ];
 
-  patches = [
-    # make meson use the provided wlroots instead of the git submodule
-    ./meson-build.patch
-  ];
+      patches = [
+        # make meson use the provided wlroots instead of the git submodule
+        ./meson-build.patch
+      ];
 
-  # Fix hardcoded paths to /usr installation
-  postPatch = ''
-    sed -i "s#/usr#$out#" src/render/OpenGL.cpp
-  '';
+      # Fix hardcoded paths to /usr installation
+      postPatch = ''
+        sed -i "s#/usr#$out#" src/render/OpenGL.cpp
+      '';
 
-  passthru.providedSessions = ["hyprland"];
+      passthru.providedSessions = ["hyprland"];
 
-  meta = with lib; {
-    homepage = "https://github.com/vaxerski/Hyprland";
-    description = "A dynamic tiling Wayland compositor that doesn't sacrifice on its looks";
-    license = licenses.bsd3;
-    platforms = platforms.linux;
-    mainProgram = "Hyprland";
-  };
-}
+      meta = with lib; {
+        homepage = "https://github.com/vaxerski/Hyprland";
+        description = "A dynamic tiling Wayland compositor that doesn't sacrifice on its looks";
+        license = licenses.bsd3;
+        platforms = platforms.linux;
+        mainProgram = "Hyprland";
+      };
+    }

nix/hidpi_wlroots.nix

@@ -0,0 +1,31 @@
+{
+  wlroots,
+  xwayland,
+  fetchpatch,
+}:
+(wlroots.overrideAttrs
+  (old: {
+    patches =
+      (old.patches or [])
+      ++ [
+        (fetchpatch {
+          url = "https://gitlab.freedesktop.org/lilydjwg/wlroots/-/commit/6c5ffcd1fee9e44780a6a8792f74ecfbe24a1ca7.diff";
+          sha256 = "sha256-Eo1pTa/PIiJsRZwIUnHGTIFFIedzODVf0ZeuXb0a3TQ=";
+        })
+        (fetchpatch {
+          url = "https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/18595000f3a21502fd60bf213122859cc348f9af.diff";
+          sha256 = "sha256-jvfkAMh3gzkfuoRhB4E9T5X1Hu62wgUjj4tZkJm0mrI=";
+          revert = true;
+        })
+      ];
+  }))
+.override {
+  xwayland = xwayland.overrideAttrs (old: {
+    patches =
+      (old.patches or [])
+      ++ [
+        ./xwayland-vsync.patch
+        ./xwayland-hidpi.patch
+      ];
+  });
+}

nix/hm-module.nix

@@ -6,7 +6,8 @@ self: {
 }: let
   cfg = config.wayland.windowManager.hyprland;
   defaultHyprlandPackage = self.packages.${pkgs.system}.default.override {
-    enableXWayland = cfg.xwayland;
+    enableXWayland = cfg.xwayland.enable;
+    hidpiXWayland = cfg.xwayland.hidpi;
   };
 in {
   options.wayland.windowManager.hyprland = {
@@ -41,12 +42,21 @@ in {
         </itemizedlist>
       '';
     };
-    xwayland = lib.mkOption {
-      type = lib.types.bool;
-      default = true;
-      description = ''
-        Enable xwayland.
-      '';
+    xwayland = {
+      enable = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = ''
+          Enable XWayland.
+        '';
+      };
+      hidpi = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = ''
+          Enable HiDPI XWayland.
+        '';
+      };
     };
 
     extraConfig = lib.mkOption {
@@ -56,20 +66,28 @@ in {
         Extra configuration lines to add to ~/.config/hypr/hyprland.conf.
       '';
     };
+
+    imports = [
+      (
+        lib.mkRenamedOptionModule
+        ["wayland" "windowManager" "hyprland" "xwayland"]
+        ["wayland" "windowManager" "hyprland" "xwayland" "enable"]
+      )
+    ];
   };
 
   config = lib.mkIf cfg.enable {
     home.packages =
       lib.optional (cfg.package != null) cfg.package
-      ++ lib.optional cfg.xwayland pkgs.xwayland;
+      ++ lib.optional cfg.xwayland.enable pkgs.xwayland;
 
     xdg.configFile."hypr/hyprland.conf" = {
       text =
         (lib.optionalString cfg.systemdIntegration ''
-            exec-once=export XDG_SESSION_TYPE=wayland
-            exec-once=${pkgs.dbus}/bin/dbus-update-activation-environment --systemd DISPLAY WAYLAND_DISPLAY HYPRLAND_INSTANCE_SIGNATURE XDG_CURRENT_DESKTOP
-            exec-once=systemctl --user start hyprland-session.target
-          '')
+          exec-once=export XDG_SESSION_TYPE=wayland
+          exec-once=${pkgs.dbus}/bin/dbus-update-activation-environment --systemd DISPLAY WAYLAND_DISPLAY HYPRLAND_INSTANCE_SIGNATURE XDG_CURRENT_DESKTOP
+          exec-once=systemctl --user start hyprland-session.target
+        '')
         + cfg.extraConfig;
 
       onChange = let