feat: compose client cursor surfaces

compositor/src/handlers/compositor.rs

@@ -50,10 +50,10 @@ impl CompositorHandler for Ferese {
             if let Some(window) = window {
                 window.on_commit();
                 self.record_client_commit(&window);
-                crate::backends::direct::render_all(self);
             }
         }
         xdg_shell::handle_commit(&mut self.popups, &mut self.space, surface);
+        crate::backends::direct::render_all(self);
     }
 }
 

compositor/src/handlers/mod.rs

@@ -40,7 +40,10 @@ impl SeatHandler for Ferese {
         &mut self.seat_state
     }
 
-    fn cursor_image(&mut self, _seat: &Seat<Self>, _image: CursorImageStatus) {}
+    fn cursor_image(&mut self, _seat: &Seat<Self>, image: CursorImageStatus) {
+        self.cursor_status = image;
+        crate::backends::direct::render_all(self);
+    }
 
     fn focus_changed(&mut self, seat: &Seat<Self>, focused: Option<&WlSurface>) {
         let client = focused.and_then(|surface| self.display_handle.get_client(surface.id()).ok());

compositor/src/input.rs

@@ -132,6 +132,7 @@ impl Ferese {
                 );
                 pointer.frame(self);
                 self.activate_focused_pointer_constraint(&pointer);
+                crate::backends::direct::render_all(self);
             }
             InputEvent::PointerMotion { event, .. } => {
                 let pointer = self.seat.get_pointer().expect("seat has a pointer");
@@ -167,6 +168,7 @@ impl Ferese {
                 );
                 pointer.frame(self);
                 self.activate_focused_pointer_constraint(&pointer);
+                crate::backends::direct::render_all(self);
             }
             InputEvent::PointerButton { event, .. } => {
                 let pointer = self.seat.get_pointer().expect("seat has a pointer");

compositor/src/state.rs

@@ -13,7 +13,7 @@ use ferese_layout::{Axis, Direction, GapConfig, LayoutResult, Rect, SizeConstrai
 use smithay::{
     backend::drm::DrmEventTime,
     desktop::{PopupManager, Space, Window, WindowSurfaceType},
-    input::{Seat, SeatState},
+    input::{Seat, SeatState, pointer::CursorImageStatus},
     reexports::{
         calloop::{EventLoop, Interest, LoopSignal, Mode, PostAction, generic::Generic},
         wayland_protocols::xdg::shell::server::xdg_toplevel,
@@ -51,6 +51,7 @@ pub struct Ferese {
     pub window_ids: HashMap<Window, WindowId>,
     pub window_geometry: HashMap<WindowId, WindowGeometry>,
     pub focused_window: Option<WindowId>,
+    pub cursor_status: CursorImageStatus,
     pub intercepted_keys: HashSet<smithay::input::keyboard::Keycode>,
     pub direct_backend: Option<crate::backends::direct::DirectBackendState>,
     next_window_id: u64,
@@ -111,6 +112,7 @@ impl Ferese {
             window_ids: HashMap::new(),
             window_geometry: HashMap::new(),
             focused_window: None,
+            cursor_status: CursorImageStatus::default_named(),
             intercepted_keys: HashSet::new(),
             direct_backend: None,
             next_window_id: 1,

compositor/src/winit.rs

@@ -8,9 +8,10 @@ use smithay::{
         renderer::{
             damage::OutputDamageTracker,
             element::{
-                surface::WaylandSurfaceRenderElement,
+                Kind as RenderElementKind,
+                surface::{WaylandSurfaceRenderElement, render_elements_from_surface_tree},
                 utils::{
-                    ConstrainAlign, ConstrainScaleBehavior, CropRenderElement,
+                    ConstrainAlign, ConstrainScaleBehavior, CropRenderElement, Relocate,
                     RelocateRenderElement, RescaleRenderElement,
                 },
             },
@@ -22,11 +23,12 @@ use smithay::{
         space::{ConstrainBehavior, ConstrainReference, constrain_space_element},
         utils::OutputPresentationFeedback,
     },
+    input::pointer::{CursorImageStatus, CursorImageSurfaceData},
     output::{Mode, Output, PhysicalProperties, Scale, Subpixel},
     reexports::calloop::EventLoop,
-    reexports::wayland_protocols::wp::presentation_time::server::wp_presentation_feedback::Kind,
-    utils::{Clock, Logical, Monotonic, Rectangle, Transform},
-    wayland::presentation::Refresh,
+    reexports::wayland_protocols::wp::presentation_time::server::wp_presentation_feedback::Kind as PresentationKind,
+    utils::{Clock, Logical, Monotonic, Physical, Point, Rectangle, Transform},
+    wayland::{compositor::with_states, presentation::Refresh},
 };
 
 use crate::Ferese;
@@ -98,7 +100,7 @@ pub fn init(event_loop: &mut EventLoop<Ferese>, state: &mut Ferese) -> Result<()
                     window.take_presentation_feedback(
                         &mut presentation,
                         |_, _| Some(output.clone()),
-                        |_, _| Kind::Vsync,
+                        |_, _| PresentationKind::Vsync,
                     );
                 });
                 let rendered = (|| -> Result<(), Box<dyn Error>> {
@@ -126,7 +128,7 @@ pub fn init(event_loop: &mut EventLoop<Ferese>, state: &mut Ferese) -> Result<()
                     clock.now(),
                     Refresh::fixed(Duration::from_nanos(1_000_000_000 / 60)),
                     sequence,
-                    Kind::Vsync,
+                    PresentationKind::Vsync,
                 );
                 state.space.elements().for_each(|window| {
                     window.send_frame(
@@ -159,6 +161,8 @@ pub(crate) fn animated_window_elements(
     };
     let scale = output.current_scale().fractional_scale();
 
+    let mut elements = cursor_elements(state, renderer, output_geometry, scale);
+    elements.extend(
         state
             .space
             .elements()
@@ -197,7 +201,52 @@ pub(crate) fn animated_window_elements(
                     },
                 ))
             })
-        .flatten()
+            .flatten(),
+    );
+    elements
+}
+
+fn cursor_elements(
+    state: &Ferese,
+    renderer: &mut GlesRenderer,
+    output_geometry: Rectangle<i32, Logical>,
+    scale: f64,
+) -> Vec<AnimatedWindowRenderElement> {
+    let CursorImageStatus::Surface(surface) = &state.cursor_status else {
+        return Vec::new();
+    };
+    let Some(pointer) = state.seat.get_pointer() else {
+        return Vec::new();
+    };
+    let hotspot = with_states(surface, |states| {
+        states
+            .data_map
+            .get::<CursorImageSurfaceData>()
+            .map(|attributes| attributes.lock().unwrap().hotspot)
+            .unwrap_or_default()
+    });
+    let logical_location =
+        pointer.current_location() - output_geometry.loc.to_f64() - hotspot.to_f64();
+    let physical_location = logical_location.to_physical_precise_round(scale);
+    let output_crop =
+        Rectangle::<i32, Logical>::from_size(output_geometry.size).to_physical_precise_round(scale);
+    let origin = Point::<i32, Physical>::default();
+
+    render_elements_from_surface_tree::<GlesRenderer, WaylandSurfaceRenderElement<GlesRenderer>>(
+        renderer,
+        surface,
+        physical_location,
+        scale,
+        1.0,
+        RenderElementKind::Cursor,
+    )
+    .into_iter()
+    .filter_map(|element| {
+        let element = RescaleRenderElement::from_element(element, origin, 1.0);
+        let element = RelocateRenderElement::from_element(element, origin, Relocate::Relative);
+
+        CropRenderElement::from_element(element, scale, output_crop)
+    })
     .collect()
 }