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surface: throttle frame requests at the refresh rate

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This commit is contained in:
Julian Orth 2024-07-14 14:03:10 +02:00
parent 535fd939d5
commit d1893a68eb
1 changed files with 36 additions and 7 deletions
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43
src/ifs/wl_surface.rs
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@ -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(),
@ -1095,6 +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();
@ -1207,9 +1210,14 @@ impl WlSurface {
damage_full = true;
}
}
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(..) {
@ -1264,10 +1272,31 @@ impl WlSurface {
}
self.client.state.damage(damage);
} else 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 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);