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Do not wait for rAF to be requested in render loop

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This commit is contained in:
Manish Goregaokar 2019-12-19 11:23:37 -08:00
parent 267ce462d8
commit 01f27e9c69
3 changed files with 24 additions and 31 deletions
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35
components/script/dom/xrsession.rs
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@ -41,7 +41,7 @@ use crate::dom::xrwebgllayer::XRWebGLLayer;
use crate::task_source::TaskSource;
use dom_struct::dom_struct;
use euclid::{Rect, RigidTransform3D, Transform3D};
use ipc_channel::ipc::IpcSender;
use ipc_channel::ipc::IpcReceiver;
use ipc_channel::router::ROUTER;
use metrics::ToMs;
use profile_traits::ipc;
@ -73,8 +73,6 @@ pub struct XRSession {
next_raf_id: Cell<i32>,
#[ignore_malloc_size_of = "closures are hard"]
raf_callback_list: DomRefCell<Vec<(i32, Option<Rc<XRFrameRequestCallback>>)>>,
#[ignore_malloc_size_of = "defined in ipc-channel"]
raf_sender: DomRefCell<Option<IpcSender<Frame>>>,
input_sources: Dom<XRInputSourceArray>,
// Any promises from calling end()
#[ignore_malloc_size_of = "promises are hard"]
@ -108,7 +106,6 @@ impl XRSession {
next_raf_id: Cell::new(0),
raf_callback_list: DomRefCell::new(vec![]),
raf_sender: DomRefCell::new(None),
input_sources: Dom::from_ref(input_sources),
end_promises: DomRefCell::new(vec![]),
ended: Cell::new(false),
@ -116,7 +113,12 @@ impl XRSession {
}
}
pub fn new(global: &GlobalScope, session: Session, mode: XRSessionMode) -> DomRoot<XRSession> {
pub fn new(
global: &GlobalScope,
session: Session,
mode: XRSessionMode,
frame_receiver: IpcReceiver<Frame>,
) -> DomRoot<XRSession> {
let ivfov = if mode == XRSessionMode::Inline {
Some(FRAC_PI_2)
} else {
@ -136,7 +138,7 @@ impl XRSession {
);
input_sources.set_initial_inputs(&ret);
ret.attach_event_handler();
ret.setup_raf_loop();
ret.setup_raf_loop(frame_receiver);
ret
}
@ -153,21 +155,15 @@ impl XRSession {
self.mode != XRSessionMode::Inline
}
fn setup_raf_loop(&self) {
assert!(
self.raf_sender.borrow().is_none(),
"RAF loop already set up"
);
fn setup_raf_loop(&self, frame_receiver: IpcReceiver<Frame>) {
let this = Trusted::new(self);
let global = self.global();
let window = global.as_window();
let (task_source, canceller) = window
.task_manager()
.dom_manipulation_task_source_with_canceller();
let (sender, receiver) = ipc::channel(global.time_profiler_chan().clone()).unwrap();
*self.raf_sender.borrow_mut() = Some(sender);
ROUTER.add_route(
receiver.to_opaque(),
frame_receiver.to_opaque(),
Box::new(move |message| {
let this = this.clone();
let _ = task_source.queue_with_canceller(
@ -179,15 +175,7 @@ impl XRSession {
}),
);
self.request_new_xr_frame();
}
/// Requests a new https://immersive-web.github.io/webxr/#xr-animation-frame
///
/// This happens regardless of the presense of rAF callbacks
fn request_new_xr_frame(&self) {
let sender = self.raf_sender.borrow().clone().unwrap();
self.session.borrow_mut().request_animation_frame(sender);
self.session.borrow_mut().start_render_loop();
}
pub fn is_outside_raf(&self) -> bool {
@ -361,7 +349,6 @@ impl XRSession {
base_layer.swap_buffers();
self.session.borrow_mut().render_animation_frame();
}
self.request_new_xr_frame();
// If the canvas element is attached to the DOM, it is now dirty,
// and we need to trigger a reflow.