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Invoke XR RAFs appropriately

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This commit is contained in:
Manish Goregaokar 2018-12-21 16:04:19 -08:00
parent 1b11a3063c
commit 4b2fa5ef08
2 changed files with 40 additions and 20 deletions
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58
components/script/dom/vrdisplay.rs
View file

@ -31,6 +31,8 @@ use crate::dom::vrframedata::VRFrameData;
use crate::dom::vrpose::VRPose;
use crate::dom::vrstageparameters::VRStageParameters;
use crate::dom::webglrenderingcontext::WebGLRenderingContext;
use crate::dom::xrframe::XRFrame;
use crate::dom::xrsession::XRSession;
use crate::script_runtime::CommonScriptMsg;
use crate::script_runtime::ScriptThreadEventCategory::WebVREvent;
use crate::task_source::TaskSourceName;
@ -77,8 +79,8 @@ pub struct VRDisplay {
running_display_raf: Cell<bool>,
paused: Cell<bool>,
stopped_on_pause: Cell<bool>,
/// Whether or not this is XR mode
xr: Cell<bool>,
/// Whether or not this is XR mode, and the session
xr_session: MutNullableDom<XRSession>,
}
unsafe_no_jsmanaged_fields!(WebVRDisplayData);
@ -135,7 +137,7 @@ impl VRDisplay {
// This flag is set when the Display was presenting when it received a VR Pause event.
// When the VR Resume event is received and the flag is set, VR presentation automatically restarts.
stopped_on_pause: Cell::new(false),
xr: Cell::new(false),
xr_session: MutNullableDom::default(),
}
}
@ -631,25 +633,43 @@ impl VRDisplay {
fn handle_raf(&self, end_sender: &Sender<Result<(f64, f64), ()>>) {
self.frame_data_status.set(VRFrameDataStatus::Waiting);
self.running_display_raf.set(true);
let mut callbacks = mem::replace(&mut *self.raf_callback_list.borrow_mut(), vec![]);
let now = self.global().as_window().Performance().Now();
// Call registered VRDisplay.requestAnimationFrame callbacks.
for (_, callback) in callbacks.drain(..) {
if let Some(callback) = callback {
let _ = callback.Call__(Finite::wrap(*now), ExceptionHandling::Report);
if let Some(session) = self.xr_session.get() {
let mut callbacks = mem::replace(&mut *self.xr_raf_callback_list.borrow_mut(), vec![]);
if callbacks.is_empty() {
return;
}
}
self.running_display_raf.set(false);
if self.frame_data_status.get() == VRFrameDataStatus::Waiting {
// User didn't call getFrameData while presenting.
// We automatically reads the pending VRFrameData to avoid overflowing the IPC-Channel buffers.
// Show a warning as the WebVR Spec recommends.
warn!("WebVR: You should call GetFrameData while presenting");
self.sync_frame_data();
let frame = XRFrame::new(&self.global(), &session, self.frame_data.borrow().clone());
for (_, callback) in callbacks.drain(..) {
if let Some(callback) = callback {
let _ = callback.Call__(Finite::wrap(*now), &frame, ExceptionHandling::Report);
}
}
// frame submission is automatic in XR
self.SubmitFrame();
} else {
self.running_display_raf.set(true);
let mut callbacks = mem::replace(&mut *self.raf_callback_list.borrow_mut(), vec![]);
// Call registered VRDisplay.requestAnimationFrame callbacks.
for (_, callback) in callbacks.drain(..) {
if let Some(callback) = callback {
let _ = callback.Call__(Finite::wrap(*now), ExceptionHandling::Report);
}
}
self.running_display_raf.set(false);
if self.frame_data_status.get() == VRFrameDataStatus::Waiting {
// User didn't call getFrameData while presenting.
// We automatically reads the pending VRFrameData to avoid overflowing the IPC-Channel buffers.
// Show a warning as the WebVR Spec recommends.
warn!("WebVR: You should call GetFrameData while presenting");
self.sync_frame_data();
}
}
match self.frame_data_status.get() {
@ -671,9 +691,9 @@ impl VRDisplay {
// XR stuff
// XXXManishearth eventually we should share as much logic as possible
impl VRDisplay {
pub fn xr_present(&self, ctx: &WebGLRenderingContext) {
pub fn xr_present(&self, session: &XRSession, ctx: &WebGLRenderingContext) {
let layer_bounds = WebVRLayer::default();
self.xr.set(true);
self.xr_session.set(Some(session));
if self.presenting.get() {
*self.layer.borrow_mut() = layer_bounds;
self.layer_ctx.set(Some(&ctx));

2
components/script/dom/xrsession.rs
View file

@ -74,7 +74,7 @@ impl XRSessionMethods for XRSession {
self.base_layer.set(layer);
if let Some(layer) = layer {
let layer = layer.downcast::<XRWebGLLayer>().unwrap();
self.display.xr_present(&layer.Context());
self.display.xr_present(&self, &layer.Context());
} else {
// steps unknown
// https://github.com/immersive-web/webxr/issues/453