Merge pull request #224 from mahkoh/jorth/frame-request-throttling

Various damage tracking changes

src/ifs/wl_surface.rs

@@ -267,6 +267,7 @@ pub struct WlSurface {
     pub need_extents_update: Cell<bool>,
     pub buffer: CloneCell<Option<Rc<SurfaceBuffer>>>,
     buffer_presented: Cell<bool>,
+    buffer_had_frame_request: Cell<bool>,
     pub shm_texture: CloneCell<Option<Rc<dyn GfxTexture>>>,
     pub buf_x: NumCell<i32>,
     pub buf_y: NumCell<i32>,
@@ -579,6 +580,7 @@ impl WlSurface {
             need_extents_update: Default::default(),
             buffer: Default::default(),
             buffer_presented: Default::default(),
+            buffer_had_frame_request: Default::default(),
             shm_texture: Default::default(),
             buf_x: Default::default(),
             buf_y: Default::default(),
@@ -1059,6 +1061,10 @@ impl WlSurface {
             alpha_changed = true;
             self.alpha.set(alpha);
         }
+        let buffer_abs_pos = self.buffer_abs_pos.get();
+        let mut max_surface_size = buffer_abs_pos.size();
+        let mut damage_full =
+            scale_changed || buffer_transform_changed || viewport_changed || alpha_changed;
         let mut buffer_changed = false;
         let mut old_raw_size = None;
         let (dx, dy) = mem::take(&mut pending.offset);
@@ -1091,6 +1097,7 @@ impl WlSurface {
                 self.buffer.set(Some(Rc::new(surface_buffer)));
                 if pending.has_damage() {
                     self.buffer_presented.set(false);
+                    self.buffer_had_frame_request.set(false);
                 }
             } else {
                 self.shm_texture.take();
@@ -1194,15 +1201,23 @@ impl WlSurface {
                 }
             }
             let (width, height) = new_size.unwrap_or_default();
-            if (width, height) != self.buffer_abs_pos.get().size() {
+            let (old_width, old_height) = buffer_abs_pos.size();
+            if (width, height) != (old_width, old_height) {
                 self.need_extents_update.set(true);
+                self.buffer_abs_pos
+                    .set(buffer_abs_pos.with_size(width, height).unwrap());
+                max_surface_size = (width.max(old_width), height.max(old_height));
+                damage_full = true;
             }
-            self.buffer_abs_pos
-                .set(self.buffer_abs_pos.get().with_size(width, height).unwrap());
         }
-        self.frame_requests
-            .borrow_mut()
-            .extend(pending.frame_request.drain(..));
+        let had_frame_requests = self.buffer_had_frame_request.get();
+        let has_frame_requests = {
+            let frs = &mut *self.frame_requests.borrow_mut();
+            frs.extend(pending.frame_request.drain(..));
+            frs.is_not_empty()
+        };
+        self.buffer_had_frame_request
+            .set(had_frame_requests || has_frame_requests);
         {
             let mut fbs = self.presentation_feedback.borrow_mut();
             for fb in fbs.drain(..) {
@@ -1248,11 +1263,40 @@ impl WlSurface {
         }
         self.ext.get().after_apply_commit();
         if self.visible.get() {
-            if self.buffer_presented.get() {
-                let now = self.client.state.now_msec() as _;
-                for fr in self.frame_requests.borrow_mut().drain(..) {
-                    fr.send_done(now);
-                    let _ = fr.client.remove_obj(&*fr);
+            if damage_full {
+                let mut damage = buffer_abs_pos
+                    .with_size(max_surface_size.0, max_surface_size.1)
+                    .unwrap();
+                if let Some(tl) = self.toplevel.get() {
+                    damage = damage.intersect(tl.node_absolute_position());
+                }
+                self.client.state.damage(damage);
+            } else if self.buffer_presented.get() {
+                // If the currently attached buffer has already been fully presented ...
+                if has_frame_requests {
+                    // ... and there are new frame requests ...
+                    if had_frame_requests {
+                        // ... and we've already dispatched frame requests for that buffer,
+                        //     then schedule new presentation of the primary output and
+                        //     unset the buffer_presented flag. This is for clients that
+                        //     send frame requests at an uncapped rate and expect the
+                        //     compositor to dispatch frame requests at the monitor
+                        //     refresh rate (e.g. firefox). This is very inefficient and
+                        //     disables VRR from working correctly. But since only firefox
+                        //     is affected, I'm ok with this.
+                        let rect = self.output.get().global.pos.get();
+                        self.client.state.damage(rect);
+                        self.buffer_presented.set(false);
+                    } else {
+                        // ... and this is the first commit that attaches a frame request
+                        //     for that buffer, then dispatch the frame requests
+                        //     immediately.
+                        let now = self.client.state.now_msec() as _;
+                        for fr in self.frame_requests.borrow_mut().drain(..) {
+                            fr.send_done(now);
+                            let _ = fr.client.remove_obj(&*fr);
+                        }
+                    }
                 }
             } else {
                 self.apply_damage(pending);

src/ifs/wl_surface/x_surface/xwindow.rs

@@ -470,6 +470,9 @@ impl StackedNode for Xwindow {
     stacked_node_impl!();
 
     fn stacked_set_visible(&self, visible: bool) {
+        let extents = self.x.surface.extents.get();
+        let (x, y) = self.x.surface.buffer_abs_pos.get().position();
+        self.data.state.damage(extents.move_(x, y));
         self.tl_set_visible(visible);
     }
 

src/ifs/wl_surface/xdg_surface/xdg_popup.rs

@@ -241,6 +241,11 @@ impl XdgPopupRequestHandler for XdgPopup {
 
 impl XdgPopup {
     pub fn set_visible(&self, visible: bool) {
+        let surface = &self.xdg.surface;
+        let extents = surface.extents.get();
+        let (x, y) = surface.buffer_abs_pos.get().position();
+        surface.client.state.damage(extents.move_(x, y));
+
         // log::info!("set visible = {}", visible);
         self.set_visible_prepared.set(false);
         self.xdg.set_visible(visible);

src/tree/float.rs

@@ -785,7 +785,9 @@ impl StackedNode for FloatNode {
     stacked_node_impl!();
 
     fn stacked_set_visible(&self, visible: bool) {
-        self.visible.set(visible);
+        if self.visible.replace(visible) != visible {
+            self.state.damage(self.position.get());
+        }
         if let Some(child) = self.child.get() {
             child.tl_set_visible(visible);
         }