winit-wayland: use ext-background-effect if available

A more modern protocol compared to the KDE one.

Cargo.toml

@@ -8,22 +8,22 @@ edition = "2024"
 license = "Apache-2.0"
 repository = "https://github.com/rust-windowing/winit"
 rust-version = "1.85"
-version = "0.31.0-beta.1"
+version = "0.31.0-beta.2"
 
 [workspace.dependencies]
 # Workspace dependencies.
 # `winit` has no version here to allow using it in dev deps for docs.
 winit = { path = "winit" }
-winit-android = { version = "=0.31.0-beta.1", path = "winit-android" }
-winit-appkit = { version = "=0.31.0-beta.1", path = "winit-appkit" }
-winit-common = { version = "=0.31.0-beta.1", path = "winit-common" }
-winit-core = { version = "=0.31.0-beta.1", path = "winit-core" }
-winit-orbital = { version = "=0.31.0-beta.1", path = "winit-orbital" }
-winit-uikit = { version = "=0.31.0-beta.1", path = "winit-uikit" }
-winit-wayland = { version = "=0.31.0-beta.1", path = "winit-wayland", default-features = false }
-winit-web = { version = "=0.31.0-beta.1", path = "winit-web" }
-winit-win32 = { version = "=0.31.0-beta.1", path = "winit-win32" }
-winit-x11 = { version = "=0.31.0-beta.1", path = "winit-x11" }
+winit-android = { version = "=0.31.0-beta.2", path = "winit-android" }
+winit-appkit = { version = "=0.31.0-beta.2", path = "winit-appkit" }
+winit-common = { version = "=0.31.0-beta.2", path = "winit-common" }
+winit-core = { version = "=0.31.0-beta.2", path = "winit-core" }
+winit-orbital = { version = "=0.31.0-beta.2", path = "winit-orbital" }
+winit-uikit = { version = "=0.31.0-beta.2", path = "winit-uikit" }
+winit-wayland = { version = "=0.31.0-beta.2", path = "winit-wayland", default-features = false }
+winit-web = { version = "=0.31.0-beta.2", path = "winit-web" }
+winit-win32 = { version = "=0.31.0-beta.2", path = "winit-win32" }
+winit-x11 = { version = "=0.31.0-beta.2", path = "winit-x11" }
 
 # Core dependencies.
 bitflags = "2"
@@ -80,7 +80,8 @@ xkbcommon-dl = "0.4.2"
 
 # Orbital dependencies.
 orbclient = { version = "0.3.47", default-features = false }
-redox_syscall = "0.5.7"
+redox_syscall = "0.7"
+libredox = "0.1.12"
 
 # Web dependencies.
 atomic-waker = "1"

README.md

@@ -8,7 +8,7 @@
 
 ```toml
 [dependencies]
-winit = "0.31.0-beta.1"
+winit = "0.31.0-beta.2"
 ```
 
 ## [Documentation](https://docs.rs/winit)

src/platform_impl/linux/wayland/dnd.rs

@@ -0,0 +1,135 @@
+use sctk::data_device_manager::{
+    data_device::DataDeviceHandler, data_offer::DataOfferHandler, data_source::DataSourceHandler,
+};
+
+use crate::platform_impl::wayland::state::WinitState;
+
+impl DataDeviceHandler for WinitState {
+    fn enter(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        data_device: &wayland_client::protocol::wl_data_device::WlDataDevice,
+        x: f64,
+        y: f64,
+        wl_surface: &wayland_client::protocol::wl_surface::WlSurface,
+    ) {
+        todo!()
+    }
+
+    fn leave(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        data_device: &wayland_client::protocol::wl_data_device::WlDataDevice,
+    ) {
+        todo!()
+    }
+
+    fn motion(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        data_device: &wayland_client::protocol::wl_data_device::WlDataDevice,
+        x: f64,
+        y: f64,
+    ) {
+        todo!()
+    }
+
+    fn selection(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        data_device: &wayland_client::protocol::wl_data_device::WlDataDevice,
+    ) {
+        todo!()
+    }
+
+    fn drop_performed(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        data_device: &wayland_client::protocol::wl_data_device::WlDataDevice,
+    ) {
+        todo!()
+    }
+}
+
+impl DataOfferHandler for WinitState {
+    fn source_actions(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        offer: &mut sctk::data_device_manager::data_offer::DragOffer,
+        actions: wayland_client::protocol::wl_data_device_manager::DndAction,
+    ) {
+        todo!()
+    }
+
+    fn selected_action(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        offer: &mut sctk::data_device_manager::data_offer::DragOffer,
+        actions: wayland_client::protocol::wl_data_device_manager::DndAction,
+    ) {
+        todo!()
+    }
+}
+
+impl DataSourceHandler for WinitState {
+    fn accept_mime(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        source: &wayland_client::protocol::wl_data_source::WlDataSource,
+        mime: Option<String>,
+    ) {
+    }
+
+    fn send_request(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        source: &wayland_client::protocol::wl_data_source::WlDataSource,
+        mime: String,
+        fd: sctk::data_device_manager::WritePipe,
+    ) {
+    }
+
+    fn cancelled(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        source: &wayland_client::protocol::wl_data_source::WlDataSource,
+    ) {
+    }
+
+    fn dnd_dropped(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        source: &wayland_client::protocol::wl_data_source::WlDataSource,
+    ) {
+    }
+
+    fn dnd_finished(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        source: &wayland_client::protocol::wl_data_source::WlDataSource,
+    ) {
+    }
+
+    fn action(
+        &mut self,
+        conn: &wayland_client::Connection,
+        qh: &wayland_client::QueueHandle<Self>,
+        source: &wayland_client::protocol::wl_data_source::WlDataSource,
+        action: wayland_client::protocol::wl_data_device_manager::DndAction,
+    ) {
+    }
+}
+
+sctk::delegate_data_device!(WinitState);

winit-android/src/lib.rs

@@ -63,7 +63,7 @@
 //! with `cargo apk`, then the minimal changes would be:
 //! 1. Remove `ndk-glue` from your `Cargo.toml`
 //! 2. Enable the `"android-native-activity"` feature for Winit: `winit = { version =
-//!    "0.31.0-beta.1", features = [ "android-native-activity" ] }`
+//!    "0.31.0-beta.2", features = [ "android-native-activity" ] }`
 //! 3. Add an `android_main` entrypoint (as above), instead of using the '`[ndk_glue::main]` proc
 //!    macro from `ndk-macros` (optionally add a dependency on `android_logger` and initialize
 //!    logging as above).

winit-core/src/event.rs

@@ -368,6 +368,18 @@ pub enum WindowEvent {
         surface_size_writer: SurfaceSizeWriter,
     },
 
+    /// The suggested bounds of the window's surface has changed.
+    ///
+    /// Contains the new bounds of the surface
+    ///
+    /// - **iOS / Android / Web / Orbital / Windows:** Unsupported.
+    SuggestedBounds(Option<PhysicalSize<u32>>),
+
+    /// The window state has changed.
+    ///
+    /// - **iOS / Android / Web / Orbital / Windows:** Unsupported.
+    WindowStateChanged,
+
     /// The system window theme has changed.
     ///
     /// Applications might wish to react to this to change the theme of the content of the window

winit-core/src/window.rs

@@ -881,7 +881,8 @@ pub trait Window: AsAny + Send + Sync + fmt::Debug {
     /// ## Platform-specific
     ///
     /// - **Android / iOS / X11 / Web / Windows:** Unsupported.
-    /// - **Wayland:** Only works with org_kde_kwin_blur_manager protocol.
+    /// - **Wayland:** Only works with `org_kde_kwin_blur_manager` or
+    ///   `ext_background_effect_manager_v1` protocol.
     fn set_blur(&self, blur: bool);
 
     /// Modifies the window's visibility.

winit-orbital/Cargo.toml

@@ -23,3 +23,4 @@ winit-core.workspace = true
 # Platform-specific
 orbclient.workspace = true
 redox_syscall.workspace = true
+libredox.workspace = true

winit-orbital/src/event_loop.rs

@@ -639,7 +639,13 @@ impl EventLoop {
 
             // Wait for event if needed.
             let mut event = syscall::Event::default();
-            self.window_target.event_socket.read(&mut event).unwrap();
+            loop {
+                match self.window_target.event_socket.read(&mut event) {
+                    Ok(_) => break,
+                    Err(syscall::Error { errno: syscall::EINTR }) => continue,
+                    Err(err) => unreachable!("failed to read event: {}", err),
+                }
+            }
 
             // TODO: handle spurious wakeups (redraw caused wakeup but redraw already handled)
             match requested_resume {

winit-orbital/src/lib.rs

@@ -33,7 +33,7 @@ impl RedoxSocket {
     // example, the seek would change in a potentially unpredictable way if either read or write
     // were called at the same time by multiple threads.
     fn open_raw(path: &str) -> syscall::Result<Self> {
-        let fd = syscall::open(path, syscall::O_RDWR | syscall::O_CLOEXEC)?;
+        let fd = libredox::call::open(path, libredox::flag::O_RDWR | libredox::flag::O_CLOEXEC, 0)?;
         Ok(Self { fd })
     }
 
@@ -97,7 +97,7 @@ struct WindowProperties<'a> {
 
 impl<'a> WindowProperties<'a> {
     fn new(path: &'a str) -> Self {
-        // orbital:flags/x/y/w/h/t
+        // /scheme/orbital/flags/x/y/w/h/t
         let mut parts = path.splitn(6, '/');
         let flags = parts.next().unwrap_or("");
         let x = parts.next().map_or(0, |part| part.parse::<i32>().unwrap_or(0));

winit-wayland/src/event_loop/mod.rs

@@ -379,6 +379,27 @@ impl EventLoop {
                 }
             }
 
+            if compositor_update.suggested_bounds {
+                let suggested_bounds = self.with_state(|state| {
+                    let windows = state.windows.get_mut();
+                    let window = windows.get(&window_id).unwrap().lock().unwrap();
+
+                    window
+                        .last_configure
+                        .as_ref()
+                        .and_then(|c| c.suggested_bounds)
+                        .map(|b| dpi::LogicalSize::new(b.0, b.1).to_physical(window.scale_factor()))
+                        .clone()
+                });
+                let event = WindowEvent::SuggestedBounds(suggested_bounds);
+                app.window_event(&self.active_event_loop, window_id, event);
+            }
+
+            if compositor_update.xdg_window_state.take().is_some() {
+                let event = WindowEvent::WindowStateChanged;
+                app.window_event(&self.active_event_loop, window_id, event);
+            }
+
             // NOTE: Rescale changed the physical size which winit operates in, thus we should
             // resize.
             if compositor_update.resized || compositor_update.scale_changed {

winit-wayland/src/lib.rs

@@ -14,12 +14,16 @@
 //! * `wayland-csd-adwaita-crossfont`.
 //! * `wayland-csd-adwaita-notitle`.
 //! * `wayland-csd-adwaita-notitlebar`.
+use std::any::Any;
 use std::ffi::c_void;
+use std::marker::PhantomData;
 use std::ptr::NonNull;
 
 use dpi::{LogicalSize, PhysicalSize};
+use rwh_06::HandleError;
 use sctk::reexports::client::Proxy;
 use sctk::reexports::client::protocol::wl_surface::WlSurface;
+use sctk::reexports::csd_frame::WindowState;
 use sctk::shm::slot::{Buffer, CreateBufferError, SlotPool};
 use wayland_client::protocol::wl_shm::Format;
 use winit_core::event_loop::ActiveEventLoop as CoreActiveEventLoop;
@@ -72,12 +76,37 @@ pub trait EventLoopBuilderExtWayland {
     fn with_any_thread(&mut self, any_thread: bool) -> &mut Self;
 }
 
+pub struct XdgSurfaceHandle<'a> {
+    raw: NonNull<c_void>,
+    _marker: PhantomData<&'a ()>,
+}
+
+impl<'a> XdgSurfaceHandle<'a> {
+    /// Create a `XdgSurfaceHandle` from a [`NonNull<c_void>`]
+    pub unsafe fn borrow_raw(raw: NonNull<c_void>) -> Self {
+        Self { raw, _marker: PhantomData }
+    }
+
+    /// Get the underlying raw xdg_surface handle.
+    pub fn as_raw(&self) -> NonNull<c_void> {
+        self.raw
+    }
+}
+
+pub trait HasXdgSurfaceHandle {
+    fn xdg_surface_handle(&self) -> Result<XdgSurfaceHandle<'_>, HandleError>;
+}
+
 /// Additional methods on [`Window`] that are specific to Wayland.
 ///
 /// [`Window`]: crate::window::Window
 pub trait WindowExtWayland {
     /// Returns `xdg_toplevel` of the window or [`None`] if the window is X11 window.
     fn xdg_toplevel(&self) -> Option<NonNull<c_void>>;
+
+    fn xdg_surface_handle<'a>(&'a self) -> Option<&dyn HasXdgSurfaceHandle>;
+
+    fn window_state(&self) -> Option<WindowState>;
 }
 
 impl WindowExtWayland for dyn CoreWindow + '_ {
@@ -85,6 +114,15 @@ impl WindowExtWayland for dyn CoreWindow + '_ {
     fn xdg_toplevel(&self) -> Option<NonNull<c_void>> {
         self.cast_ref::<Window>()?.xdg_toplevel()
     }
+
+    #[inline]
+    fn xdg_surface_handle(&self) -> Option<&dyn HasXdgSurfaceHandle> {
+        Some(self.cast_ref::<Window>()? as &dyn HasXdgSurfaceHandle)
+    }
+
+    fn window_state(&self) -> Option<WindowState> {
+        self.cast_ref::<Window>()?.xdg_window_state()
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]

winit-wayland/src/state.rs

@@ -29,7 +29,7 @@ use crate::seat::{
     PointerConstraintsState, PointerGesturesState, RelativePointerState, TextInputState,
     WinitPointerData, WinitPointerDataExt, WinitSeatState,
 };
-use crate::types::kwin_blur::KWinBlurManager;
+use crate::types::bgr_effects::BgrEffectManager;
 use crate::types::wp_fractional_scaling::FractionalScalingManager;
 use crate::types::wp_tablet_input_v2::TabletManager;
 use crate::types::wp_viewporter::ViewporterState;
@@ -116,8 +116,8 @@ pub struct WinitState {
     /// Fractional scaling manager.
     pub fractional_scaling_manager: Option<FractionalScalingManager>,
 
-    /// KWin blur manager.
-    pub kwin_blur_manager: Option<KWinBlurManager>,
+    /// Blur manager.
+    pub blur_manager: Option<BgrEffectManager>,
 
     /// Loop handle to re-register event sources, such as keyboard repeat.
     pub loop_handle: LoopHandle<'static, Self>,
@@ -192,7 +192,7 @@ impl WinitState {
             window_events_sink: Default::default(),
             viewporter_state,
             fractional_scaling_manager,
-            kwin_blur_manager: KWinBlurManager::new(globals, queue_handle).ok(),
+            blur_manager: BgrEffectManager::new(globals, queue_handle).ok(),
 
             seats,
             text_input_state: TextInputState::new(globals, queue_handle).ok(),
@@ -301,15 +301,24 @@ impl WindowHandler for WinitState {
             self.window_compositor_updates.len() - 1
         };
 
-        // Populate the configure to the window.
-        self.window_compositor_updates[pos].resized |= self
+        let mut winit_window = self
             .windows
             .get_mut()
             .get_mut(&window_id)
             .expect("got configure for dead window.")
             .lock()
-            .unwrap()
-            .configure(configure, &self.shm, &self.subcompositor_state);
+            .unwrap();
+        // Populate the configure to the window.
+
+        self.window_compositor_updates[pos].suggested_bounds |= configure.suggested_bounds
+            != winit_window.last_configure.as_ref().and_then(|last| last.suggested_bounds);
+
+        if winit_window.last_configure.as_ref().is_none_or(|last| last.state != configure.state) {
+            self.window_compositor_updates[pos].xdg_window_state = Some(configure.state);
+        }
+
+        self.window_compositor_updates[pos].resized |=
+            winit_window.configure(configure, &self.shm, &self.subcompositor_state);
 
         // NOTE: configure demands wl_surface::commit, however winit doesn't commit on behalf of the
         // users, since it can break a lot of things, thus it'll ask users to redraw instead.
@@ -437,11 +446,24 @@ pub struct WindowCompositorUpdate {
 
     /// Close the window.
     pub close_window: bool,
+
+    /// New suggested bounds.
+    pub suggested_bounds: bool,
+
+    /// New xdg window state.
+    pub xdg_window_state: Option<sctk::reexports::csd_frame::WindowState>,
 }
 
 impl WindowCompositorUpdate {
     fn new(window_id: WindowId) -> Self {
-        Self { window_id, resized: false, scale_changed: false, close_window: false }
+        Self {
+            window_id,
+            resized: false,
+            scale_changed: false,
+            close_window: false,
+            suggested_bounds: false,
+            xdg_window_state: None,
+        }
     }
 }
 

winit-wayland/src/types/bgr_effects.rs

@@ -0,0 +1,85 @@
+use sctk::compositor::Region;
+use sctk::reexports::client::QueueHandle;
+use sctk::reexports::client::globals::{BindError, GlobalList};
+use sctk::reexports::client::protocol::wl_surface::WlSurface;
+use sctk::reexports::protocols::ext::background_effect::v1::client::ext_background_effect_surface_v1::ExtBackgroundEffectSurfaceV1;
+use wayland_protocols_plasma::blur::client::org_kde_kwin_blur::OrgKdeKwinBlur;
+
+use crate::state::WinitState;
+use crate::types::ext_background_effect::ExtBackgroundEffectManager;
+use crate::types::kwin_blur::KWinBlurManager;
+
+/// Wrapper around various background effects for [`WlSurface`].
+#[derive(Debug, Clone)]
+pub enum BgrEffectManager {
+    Ext(ExtBackgroundEffectManager),
+    KWin(KWinBlurManager),
+}
+
+impl BgrEffectManager {
+    pub fn new(
+        globals: &GlobalList,
+        queue_handle: &QueueHandle<WinitState>,
+    ) -> Result<Self, BindError> {
+        ExtBackgroundEffectManager::new(globals, queue_handle)
+            .map(Self::Ext)
+            .or_else(|_| KWinBlurManager::new(globals, queue_handle).map(Self::KWin))
+    }
+
+    /// Creates a new blur effect for the surface.
+    pub fn new_blur_effect(
+        &mut self,
+        surface: &WlSurface,
+        queue_handle: &QueueHandle<WinitState>,
+    ) -> SurfaceBlurEffect {
+        match self {
+            BgrEffectManager::Ext(mgr) => SurfaceBlurEffect::Ext(mgr.blur(surface, queue_handle)),
+            BgrEffectManager::KWin(mgr) => SurfaceBlurEffect::Kwin(
+                mgr.blur(surface, queue_handle),
+                mgr.clone(),
+                surface.clone(),
+            ),
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum SurfaceBlurEffect {
+    Ext(ExtBackgroundEffectSurfaceV1),
+    Kwin(OrgKdeKwinBlur, KWinBlurManager, WlSurface),
+}
+
+impl SurfaceBlurEffect {
+    /// Returns `true` if the main surface commit is required.
+    ///
+    /// `None` clears the blur.
+    #[must_use]
+    pub fn set_blur(&self, region: Option<&Region>) -> bool {
+        let region = region.map(|region| region.wl_region());
+        match self {
+            SurfaceBlurEffect::Ext(surface) => {
+                surface.set_blur_region(region);
+                true
+            },
+            SurfaceBlurEffect::Kwin(blur, ..) => {
+                blur.set_region(region);
+                blur.commit();
+                true
+            },
+        }
+    }
+}
+
+impl Drop for SurfaceBlurEffect {
+    fn drop(&mut self) {
+        match self {
+            SurfaceBlurEffect::Ext(surface) => surface.destroy(),
+            SurfaceBlurEffect::Kwin(blur, mgr, wl_surface) => {
+                blur.set_region(None);
+                blur.commit();
+                blur.release();
+                mgr.unset(wl_surface);
+            },
+        }
+    }
+}

winit-wayland/src/types/ext_background_effect.rs

@@ -0,0 +1,59 @@
+use sctk::globals::GlobalData;
+use sctk::reexports::client::globals::{BindError, GlobalList};
+use sctk::reexports::client::protocol::wl_surface::WlSurface;
+use sctk::reexports::client::{Connection, Dispatch, Proxy, QueueHandle, delegate_dispatch};
+use wayland_protocols::ext::background_effect::v1::client::ext_background_effect_manager_v1::ExtBackgroundEffectManagerV1;
+use wayland_protocols::ext::background_effect::v1::client::ext_background_effect_surface_v1::ExtBackgroundEffectSurfaceV1;
+
+use crate::state::WinitState;
+
+#[derive(Debug, Clone)]
+pub struct ExtBackgroundEffectManager {
+    manager: ExtBackgroundEffectManagerV1,
+}
+
+impl ExtBackgroundEffectManager {
+    pub fn new(
+        globals: &GlobalList,
+        queue_handle: &QueueHandle<WinitState>,
+    ) -> Result<Self, BindError> {
+        let manager = globals.bind(queue_handle, 1..=1, GlobalData)?;
+        Ok(Self { manager })
+    }
+
+    pub fn blur(
+        &mut self,
+        surface: &WlSurface,
+        queue_handle: &QueueHandle<WinitState>,
+    ) -> ExtBackgroundEffectSurfaceV1 {
+        self.manager.get_background_effect(surface, queue_handle, ())
+    }
+}
+
+impl Dispatch<ExtBackgroundEffectManagerV1, GlobalData, WinitState> for ExtBackgroundEffectManager {
+    fn event(
+        _: &mut WinitState,
+        _: &ExtBackgroundEffectManagerV1,
+        _: <ExtBackgroundEffectManagerV1 as Proxy>::Event,
+        _: &GlobalData,
+        _: &Connection,
+        _: &QueueHandle<WinitState>,
+    ) {
+    }
+}
+
+impl Dispatch<ExtBackgroundEffectSurfaceV1, (), WinitState> for ExtBackgroundEffectManager {
+    fn event(
+        _: &mut WinitState,
+        _: &ExtBackgroundEffectSurfaceV1,
+        _: <ExtBackgroundEffectSurfaceV1 as Proxy>::Event,
+        _: &(),
+        _: &Connection,
+        _: &QueueHandle<WinitState>,
+    ) {
+        // There is no event
+    }
+}
+
+delegate_dispatch!(WinitState: [ExtBackgroundEffectManagerV1: GlobalData] => ExtBackgroundEffectManager);
+delegate_dispatch!(WinitState: [ExtBackgroundEffectSurfaceV1: ()] => ExtBackgroundEffectManager);

winit-wayland/src/types/mod.rs

@@ -1,6 +1,8 @@
 //! Wayland protocol implementation boilerplate.
 
+pub mod bgr_effects;
 pub mod cursor;
+pub mod ext_background_effect;
 pub mod kwin_blur;
 pub mod wp_fractional_scaling;
 pub mod wp_tablet_input_v2;

winit-wayland/src/window/mod.rs

@@ -12,6 +12,7 @@ use sctk::reexports::client::protocol::wl_surface::WlSurface;
 use sctk::reexports::client::{Proxy, QueueHandle};
 use sctk::reexports::protocols::xdg::activation::v1::client::xdg_activation_v1::XdgActivationV1;
 use sctk::shell::WaylandSurface;
+use sctk::shell::xdg::XdgSurface;
 use sctk::shell::xdg::window::{Window as SctkWindow, WindowDecorations};
 use tracing::warn;
 use winit_core::cursor::Cursor;
@@ -30,7 +31,7 @@ use super::event_loop::sink::EventSink;
 use super::output::MonitorHandle;
 use super::state::WinitState;
 use super::types::xdg_activation::XdgActivationTokenData;
-use crate::{WindowAttributesWayland, output};
+use crate::{HasXdgSurfaceHandle, WindowAttributesWayland, XdgSurfaceHandle, output};
 
 pub(crate) mod state;
 
@@ -127,7 +128,8 @@ impl Window {
         // Set transparency hint.
         window_state.set_transparent(attributes.transparent);
 
-        window_state.set_blur(attributes.blur);
+        // Set blur.
+        let _ = window_state.set_blur(attributes.blur);
 
         // Set the decorations hint.
         window_state.set_decorate(attributes.decorations);
@@ -251,6 +253,11 @@ impl Window {
     pub fn surface(&self) -> &WlSurface {
         self.window.wl_surface()
     }
+
+    #[inline]
+    pub fn xdg_window_state(&self) -> Option<sctk::reexports::csd_frame::WindowState> {
+        self.window_state.lock().unwrap().last_configure.as_ref().map(|c| c.state)
+    }
 }
 
 impl Drop for Window {
@@ -485,7 +492,9 @@ impl CoreWindow for Window {
 
     #[inline]
     fn set_blur(&self, blur: bool) {
-        self.window_state.lock().unwrap().set_blur(blur);
+        if self.window_state.lock().unwrap().set_blur(blur) {
+            self.request_redraw();
+        }
     }
 
     #[inline]
@@ -655,6 +664,17 @@ impl CoreWindow for Window {
     }
 }
 
+impl HasXdgSurfaceHandle for Window {
+    fn xdg_surface_handle(&self) -> Result<XdgSurfaceHandle<'_>, rwh_06::HandleError> {
+        let raw = {
+            let ptr = self.window.xdg_surface().id().as_ptr();
+            std::ptr::NonNull::new(ptr as *mut _).expect("wl_surface will never be null")
+        };
+
+        unsafe { Ok(XdgSurfaceHandle::borrow_raw(raw)) }
+    }
+}
+
 /// The request from the window to the event loop.
 #[derive(Debug)]
 pub struct WindowRequests {

winit-wayland/src/window/state.rs

@@ -29,7 +29,6 @@ use sctk::shm::slot::SlotPool;
 use sctk::subcompositor::SubcompositorState;
 use tracing::{info, warn};
 use wayland_protocols::xdg::toplevel_icon::v1::client::xdg_toplevel_icon_manager_v1::XdgToplevelIconManagerV1;
-use wayland_protocols_plasma::blur::client::org_kde_kwin_blur::OrgKdeKwinBlur;
 use winit_core::cursor::{CursorIcon, CustomCursor as CoreCustomCursor};
 use winit_core::error::{NotSupportedError, RequestError};
 use winit_core::window::{
@@ -43,8 +42,8 @@ use crate::seat::{
     ZwpTextInputV3Ext,
 };
 use crate::state::{WindowCompositorUpdate, WinitState};
+use crate::types::bgr_effects::{BgrEffectManager, SurfaceBlurEffect};
 use crate::types::cursor::{CustomCursor, SelectedCursor, WaylandCustomCursor};
-use crate::types::kwin_blur::KWinBlurManager;
 use crate::types::xdg_toplevel_icon_manager::ToplevelIcon;
 
 #[cfg(feature = "sctk-adwaita")]
@@ -155,8 +154,8 @@ pub struct WindowState {
 
     viewport: Option<WpViewport>,
     fractional_scale: Option<WpFractionalScaleV1>,
-    blur: Option<OrgKdeKwinBlur>,
-    blur_manager: Option<KWinBlurManager>,
+    blur: Option<SurfaceBlurEffect>,
+    blur_manager: Option<BgrEffectManager>,
 
     /// Whether the client side decorations have pending move operations.
     ///
@@ -205,7 +204,7 @@ impl WindowState {
             toplevel_icon: None,
             xdg_toplevel_icon_manager,
             blur: None,
-            blur_manager: winit_state.kwin_blur_manager.clone(),
+            blur_manager: winit_state.blur_manager.clone(),
             compositor,
             handle,
             csd_fails: false,
@@ -704,6 +703,13 @@ impl WindowState {
             // Set surface size without the borders.
             viewport.set_destination(self.size.width as _, self.size.height as _);
         }
+
+        // Update blur region with new size.
+        if self.blur.is_some() {
+            // NOTE: either user resized or configure, in both cases
+            // the redraw scheduling is done on the caller side.
+            let _ = self.set_blur(true);
+        }
     }
 
     /// Get the scale factor of the window.
@@ -1063,20 +1069,37 @@ impl WindowState {
         }
     }
 
-    /// Make window background blurred
-    #[inline]
-    pub fn set_blur(&mut self, blurred: bool) {
-        if blurred && self.blur.is_none() {
-            if let Some(blur_manager) = self.blur_manager.as_ref() {
-                let blur = blur_manager.blur(self.window.wl_surface(), &self.queue_handle);
-                blur.commit();
-                self.blur = Some(blur);
-            } else {
-                info!("Blur manager unavailable, unable to change blur")
-            }
-        } else if !blurred && self.blur.is_some() {
-            self.blur_manager.as_ref().unwrap().unset(self.window.wl_surface());
-            self.blur.take().unwrap().release();
+    /// Make window background blurred.
+    ///
+    /// Returns `true` if redraw is required.
+    #[must_use]
+    pub fn set_blur(&mut self, blurred: bool) -> bool {
+        if !blurred {
+            self.blur = None;
+            return true;
+        }
+
+        let mgr = match self.blur_manager.as_mut() {
+            Some(mgr) => mgr,
+            None => {
+                info!("Blur manager unavailable, unable to change blur");
+                return false;
+            },
+        };
+
+        let blur = match self.blur.as_ref() {
+            Some(blur) => blur,
+            None => {
+                self.blur = Some(mgr.new_blur_effect(self.window.wl_surface(), &self.queue_handle));
+                self.blur.as_ref().unwrap()
+            },
+        };
+
+        if let Ok(region) = Region::new(&*self.compositor) {
+            region.add(0, 0, i32::MAX, i32::MAX);
+            blur.set_blur(Some(&region))
+        } else {
+            false
         }
     }
 
@@ -1174,10 +1197,6 @@ impl WindowState {
 
 impl Drop for WindowState {
     fn drop(&mut self) {
-        if let Some(blur) = self.blur.take() {
-            blur.release();
-        }
-
         if let Some(fs) = self.fractional_scale.take() {
             fs.destroy();
         }

winit/examples/application.rs

@@ -557,7 +557,9 @@ impl ApplicationHandler for Application {
             | WindowEvent::DragDropped { .. }
             | WindowEvent::Destroyed
             | WindowEvent::Ime(_)
-            | WindowEvent::Moved(_) => (),
+            | WindowEvent::Moved(_)
+            | WindowEvent::SuggestedBounds(_)
+            | WindowEvent::WindowStateChanged => (),
         }
     }
 

winit/src/changelog/unreleased.md

@@ -39,18 +39,3 @@ The migration guide could reference other migration examples in the current
 changelog entry.
 
 ## Unreleased
-
-### Added
-
-- Add `EventLoopExtRegister::register_app` for being explicit about how the event loop runs on Web.
-- Add `EventLoopExtNeverReturn::run_app_never_return` for being explicit about how the event loop runs on iOS.
-
-### Changed
-
-- On Web, avoid throwing an exception in `EventLoop::run_app`, instead preferring to return to the caller.
-  This requires passing a `'static` application to ensure that the application state will live as long as necessary.
-- On Web, the event loop can now always be re-created once it has finished running.
-
-### Fixed
-
-- Fixed panic when calling `Window::set_ime_allowed`.

winit/src/changelog/v0.31.md

@@ -1,3 +1,20 @@
+## 0.31.0-beta.2
+
+### Added
+
+- Add `EventLoopExtRegister::register_app` for being explicit about how the event loop runs on Web.
+- Add `EventLoopExtNeverReturn::run_app_never_return` for being explicit about how the event loop runs on iOS.
+
+### Changed
+
+- On Web, avoid throwing an exception in `EventLoop::run_app`, instead preferring to return to the caller.
+  This requires passing a `'static` application to ensure that the application state will live as long as necessary.
+- On Web, the event loop can now always be re-created once it has finished running.
+
+### Fixed
+
+- Fixed panic when calling `Window::set_ime_allowed`.
+
 ## 0.31.0-beta.1
 
 ### Added