render: keep track of outputs whose hardware cursor must be rendered

src/compositor.rs

@@ -392,6 +392,7 @@ fn create_dummy_output(state: &Rc<State>) {
         hardware_cursor: Default::default(),
         update_render_data_scheduled: Cell::new(false),
         screencasts: Default::default(),
+        hardware_cursor_needs_render: Cell::new(false),
     });
     let dummy_workspace = Rc::new(WorkspaceNode {
         id: state.node_ids.next(),

src/ifs/wl_seat.rs

@@ -258,6 +258,7 @@ impl WlSeatGlobal {
         let (x, y) = self.get_position();
         for output in self.state.root.outputs.lock().values() {
             if let Some(hc) = output.hardware_cursor.get() {
+                let render = render | output.hardware_cursor_needs_render.take();
                 let scale = output.preferred_scale.get();
                 let extents = cursor.extents_at_scale(scale);
                 if render {
@@ -290,6 +291,9 @@ impl WlSeatGlobal {
                     hc.set_enabled(true);
                     hc.set_position(x_rel + extents.x1(), y_rel + extents.y1());
                 } else {
+                    if render {
+                        output.hardware_cursor_needs_render.set(true);
+                    }
                     hc.set_enabled(false);
                 }
                 hc.commit();

src/tasks/connector.rs

@@ -128,6 +128,7 @@ impl ConnectorHandler {
             jay_outputs: Default::default(),
             screencasts: Default::default(),
             update_render_data_scheduled: Cell::new(false),
+            hardware_cursor_needs_render: Cell::new(false),
         });
         self.state.add_output_scale(on.preferred_scale.get());
         let mode = info.initial_mode;

src/tree/output.rs

@@ -61,6 +61,7 @@ pub struct OutputNode {
     pub lock_surface: CloneCell<Option<Rc<ExtSessionLockSurfaceV1>>>,
     pub preferred_scale: Cell<Scale>,
     pub hardware_cursor: CloneCell<Option<Rc<dyn HardwareCursor>>>,
+    pub hardware_cursor_needs_render: Cell<bool>,
     pub update_render_data_scheduled: Cell<bool>,
     pub screencasts: CopyHashMap<(ClientId, JayScreencastId), Rc<JayScreencast>>,
 }