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Avoid double-spawning RAF thread

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This commit is contained in:
Manish Goregaokar 2019-01-15 16:18:02 -08:00
parent 9ea28c4c63
commit 0038ddf51e
1 changed files with 7 additions and 0 deletions
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7
components/script/dom/vrdisplay.rs
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@ -61,6 +61,7 @@ pub struct VRDisplay {
depth_near: Cell<f64>,
depth_far: Cell<f64>,
presenting: Cell<bool>,
has_raf_thread: Cell<bool>,
left_eye_params: MutDom<VREyeParameters>,
right_eye_params: MutDom<VREyeParameters>,
capabilities: MutDom<VRDisplayCapabilities>,
@ -130,6 +131,7 @@ impl VRDisplay {
depth_near: Cell::new(0.01),
depth_far: Cell::new(10000.0),
presenting: Cell::new(false),
has_raf_thread: Cell::new(false),
left_eye_params: MutDom::new(&*VREyeParameters::new(
display.left_eye_parameters.clone(),
&global,
@ -652,6 +654,10 @@ impl VRDisplay {
let xr = self.global().as_window().Navigator().Xr();
xr.set_active_immersive_session(&self);
self.process_renderstate_queue();
if self.has_raf_thread.get() {
return;
}
self.has_raf_thread.set(true);
let (sync_sender, sync_receiver) = webgl_channel().unwrap();
*self.frame_data_receiver.borrow_mut() = Some(sync_receiver);
@ -760,6 +766,7 @@ impl VRDisplay {
let xr = self.global().as_window().Navigator().Xr();
xr.deactivate_session();
*self.frame_data_receiver.borrow_mut() = None;
self.has_raf_thread.set(false);
if let Some(api_sender) = self.api_sender() {
let display_id = self.display.borrow().display_id;
api_sender