Hook requestSession() into new XR crate

components/script/dom/bindings/trace.rs

@@ -486,7 +486,7 @@ unsafe_no_jsmanaged_fields!(WebGLVersion);
 unsafe_no_jsmanaged_fields!(WebGLSLVersion);
 unsafe_no_jsmanaged_fields!(MediaList);
 unsafe_no_jsmanaged_fields!(WebVRGamepadData, WebVRGamepadState, WebVRGamepadHand);
-unsafe_no_jsmanaged_fields!(webxr_api::Registry);
+unsafe_no_jsmanaged_fields!(webxr_api::Registry, webxr_api::Session);
 unsafe_no_jsmanaged_fields!(ScriptToConstellationChan);
 unsafe_no_jsmanaged_fields!(InteractiveMetrics);
 unsafe_no_jsmanaged_fields!(InteractiveWindow);

components/script/dom/xr.rs

@@ -10,7 +10,7 @@ use crate::dom::bindings::codegen::Bindings::XRBinding::XRSessionCreationOptions
 use crate::dom::bindings::codegen::Bindings::XRBinding::{XRMethods, XRSessionMode};
 use crate::dom::bindings::error::Error;
 use crate::dom::bindings::inheritance::Castable;
-use crate::dom::bindings::refcounted::TrustedPromise;
+use crate::dom::bindings::refcounted::{Trusted, TrustedPromise};
 use crate::dom::bindings::reflector::{reflect_dom_object, DomObject};
 use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
 use crate::dom::event::Event;
@@ -32,7 +32,7 @@ use std::cell::Cell;
 use std::rc::Rc;
 use webvr_traits::{WebVRDisplayData, WebVRDisplayEvent, WebVREvent, WebVRMsg};
 use webvr_traits::{WebVRGamepadData, WebVRGamepadEvent, WebVRGamepadState};
-use webxr_api::{Error as XRError, SessionMode};
+use webxr_api::{Error as XRError, Session, SessionMode};
 
 #[dom_struct]
 pub struct XR {
@@ -160,6 +160,17 @@ impl XRMethods for XR {
         options: &XRSessionCreationOptions,
         comp: InCompartment,
     ) -> Rc<Promise> {
+        #[derive(serde::Serialize, serde::Deserialize)]
+        pub struct RequestSession {
+            sender: IpcSender<Result<Session, XRError>>,
+        }
+
+        #[typetag::serde]
+        impl webxr_api::SessionRequestCallback for RequestSession {
+            fn callback(&mut self, result: Result<Session, XRError>) {
+                let _ = self.sender.send(result);
+            }
+        }
         let promise = Promise::new_in_current_compartment(&self.global(), comp);
         if options.mode != XRSessionMode::Immersive_vr {
             promise.reject_error(Error::NotSupported);
@@ -170,28 +181,42 @@ impl XRMethods for XR {
             promise.reject_error(Error::InvalidState);
             return promise;
         }
-        // we set pending immersive session to true further down
-        // to handle rejections in a cleaner way
-
-        let displays = self.get_displays();
-
-        let displays = match displays {
-            Ok(d) => d,
-            Err(_) => {
-                promise.reject_native(&());
-                return promise;
-            },
-        };
-
-        // XXXManishearth filter for displays which can_present
-        if displays.is_empty() {
-            promise.reject_error(Error::Security);
-        }
 
         self.set_pending();
 
-        let session = XRSession::new(&self.global(), &displays[0]);
-        session.xr_present(promise.clone());
+        let promise = Promise::new_in_current_compartment(&self.global(), comp);
+        let mut trusted = Some(TrustedPromise::new(promise.clone()));
+        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();
+        ROUTER.add_route(
+            receiver.to_opaque(),
+            Box::new(move |message| {
+                // router doesn't know this is only called once
+                let trusted = trusted.take().unwrap();
+                let this = this.clone();
+                let message = if let Ok(message) = message.to() {
+                    message
+                } else {
+                    error!("requestSession callback given incorrect payload");
+                    return;
+                };
+                let _ = task_source.queue_with_canceller(
+                    task!(request_session: move || {
+                        this.root().session_obtained(message, trusted.root());
+                    }),
+                    &canceller,
+                );
+            }),
+        );
+        window
+            .webxr_registry()
+            .request_session(options.mode.into(), RequestSession { sender });
+
         promise
     }
 
@@ -202,6 +227,19 @@ impl XRMethods for XR {
 }
 
 impl XR {
+    fn session_obtained(&self, response: Result<Session, XRError>, promise: Rc<Promise>) {
+        let session = match response {
+            Ok(session) => session,
+            Err(_) => {
+                promise.reject_native(&());
+                return;
+            },
+        };
+
+        let session = XRSession::new(&self.global(), session);
+        promise.resolve_native(&session);
+    }
+
     pub fn get_displays(&self) -> Result<Vec<DomRoot<VRDisplay>>, ()> {
         if let Some(webvr_thread) = self.webvr_thread() {
             let (sender, receiver) =

components/script/dom/xrsession.rs

@@ -3,7 +3,6 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 use crate::compartments::InCompartment;
-use crate::dom::bindings::codegen::Bindings::VRDisplayBinding::VRDisplayMethods;
 use crate::dom::bindings::codegen::Bindings::XRBinding::XRSessionMode;
 use crate::dom::bindings::codegen::Bindings::XRReferenceSpaceBinding::XRReferenceSpaceType;
 use crate::dom::bindings::codegen::Bindings::XRRenderStateBinding::XRRenderStateInit;
@@ -13,59 +12,61 @@ use crate::dom::bindings::codegen::Bindings::XRSessionBinding::XRFrameRequestCal
 use crate::dom::bindings::codegen::Bindings::XRSessionBinding::XRSessionMethods;
 use crate::dom::bindings::error::Error;
 use crate::dom::bindings::reflector::{reflect_dom_object, DomObject};
-use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
+use crate::dom::bindings::root::{DomRoot, MutNullableDom};
 use crate::dom::eventtarget::EventTarget;
 use crate::dom::globalscope::GlobalScope;
 use crate::dom::promise::Promise;
-use crate::dom::vrdisplay::VRDisplay;
 use crate::dom::xrinputsource::XRInputSource;
 use crate::dom::xrlayer::XRLayer;
 use crate::dom::xrreferencespace::XRReferenceSpace;
 use crate::dom::xrrenderstate::XRRenderState;
 use crate::dom::xrspace::XRSpace;
 use dom_struct::dom_struct;
+use euclid::Vector3D;
 use std::rc::Rc;
+use webxr_api::Session;
 
 #[dom_struct]
 pub struct XRSession {
     eventtarget: EventTarget,
-    display: Dom<VRDisplay>,
     base_layer: MutNullableDom<XRLayer>,
     blend_mode: XREnvironmentBlendMode,
     viewer_space: MutNullableDom<XRSpace>,
+    #[ignore_malloc_size_of = "defined in webxr"]
+    session: Session,
 }
 
 impl XRSession {
-    fn new_inherited(display: &VRDisplay) -> XRSession {
+    fn new_inherited(session: Session) -> XRSession {
         XRSession {
             eventtarget: EventTarget::new_inherited(),
-            display: Dom::from_ref(display),
             base_layer: Default::default(),
             // we don't yet support any AR devices
             blend_mode: XREnvironmentBlendMode::Opaque,
             viewer_space: Default::default(),
+            session,
         }
     }
 
-    pub fn new(global: &GlobalScope, display: &VRDisplay) -> DomRoot<XRSession> {
+    pub fn new(global: &GlobalScope, session: Session) -> DomRoot<XRSession> {
         reflect_dom_object(
-            Box::new(XRSession::new_inherited(display)),
+            Box::new(XRSession::new_inherited(session)),
             global,
             XRSessionBinding::Wrap,
         )
     }
 
-    pub fn xr_present(&self, p: Rc<Promise>) {
-        self.display.xr_present(self, None, Some(p));
-    }
-
-    pub fn display(&self) -> &VRDisplay {
-        &self.display
-    }
-
     pub fn set_layer(&self, layer: &XRLayer) {
         self.base_layer.set(Some(layer))
     }
+
+    pub fn left_eye_params_offset(&self) -> Vector3D<f64> {
+        unimplemented!()
+    }
+
+    pub fn right_eye_params_offset(&self) -> Vector3D<f64> {
+        unimplemented!()
+    }
 }
 
 impl XRSessionMethods for XRSession {
@@ -76,30 +77,22 @@ impl XRSessionMethods for XRSession {
 
     // https://immersive-web.github.io/webxr/#dom-xrsession-renderstate
     fn RenderState(&self) -> DomRoot<XRRenderState> {
-        // XXXManishearth maybe cache this
-        XRRenderState::new(
-            &self.global(),
-            *self.display.DepthNear(),
-            *self.display.DepthFar(),
-            self.base_layer.get().as_ref().map(|l| &**l),
-        )
+        unimplemented!()
     }
 
     /// https://immersive-web.github.io/webxr/#dom-xrsession-requestanimationframe
     fn UpdateRenderState(&self, init: &XRRenderStateInit, comp: InCompartment) -> Rc<Promise> {
-        let p = Promise::new_in_current_compartment(&self.global(), comp);
-        self.display.queue_renderstate(init, p.clone());
-        p
+        unimplemented!()
     }
 
     /// https://immersive-web.github.io/webxr/#dom-xrsession-requestanimationframe
     fn RequestAnimationFrame(&self, callback: Rc<XRFrameRequestCallback>) -> i32 {
-        self.display.xr_raf(callback) as i32
+        unimplemented!()
     }
 
     /// https://immersive-web.github.io/webxr/#dom-xrsession-cancelanimationframe
     fn CancelAnimationFrame(&self, frame: i32) {
-        self.display.xr_cancel_raf(frame)
+        unimplemented!()
     }
 
     /// https://immersive-web.github.io/webxr/#dom-xrsession-environmentblendmode
@@ -131,6 +124,6 @@ impl XRSessionMethods for XRSession {
 
     /// https://immersive-web.github.io/webxr/#dom-xrsession-getinputsources
     fn GetInputSources(&self) -> Vec<DomRoot<XRInputSource>> {
-        self.display.get_input_sources()
+        unimplemented!()
     }
 }

components/script/dom/xrview.rs

@@ -11,7 +11,7 @@ use crate::dom::vrframedata::create_typed_array;
 use crate::dom::xrrigidtransform::XRRigidTransform;
 use crate::dom::xrsession::XRSession;
 use dom_struct::dom_struct;
-use euclid::{RigidTransform3D, Vector3D};
+use euclid::RigidTransform3D;
 use js::jsapi::{Heap, JSContext, JSObject};
 use std::ptr::NonNull;
 use webvr_traits::WebVRFrameData;
@@ -48,22 +48,19 @@ impl XRView {
         pose: &RigidTransform3D<f64>,
         data: &WebVRFrameData,
     ) -> DomRoot<XRView> {
-        let vr_display = session.display();
-
         // XXXManishearth compute and cache projection matrices on the Display
         let (proj, offset) = if eye == XREye::Left {
             (
                 &data.left_projection_matrix,
-                vr_display.left_eye_params_offset(),
+                session.left_eye_params_offset(),
             )
         } else {
             (
                 &data.right_projection_matrix,
-                vr_display.right_eye_params_offset(),
+                session.right_eye_params_offset(),
             )
         };
 
-        let offset = Vector3D::new(offset[0] as f64, offset[1] as f64, offset[2] as f64);
         let transform = pose.post_mul(&offset.into());
         let transform = XRRigidTransform::new(global, transform);