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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use crate::dom::bindings::codegen::Bindings::FakeXRDeviceBinding::{
self, FakeXRDeviceMethods, FakeXRRigidTransformInit, FakeXRViewInit,
};
use crate::dom::bindings::codegen::Bindings::XRViewBinding::XREye;
use crate::dom::bindings::error::{Error, Fallible};
use crate::dom::bindings::refcounted::TrustedPromise;
use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
use crate::dom::bindings::root::DomRoot;
use crate::dom::globalscope::GlobalScope;
use crate::dom::promise::Promise;
use crate::task_source::TaskSource;
use dom_struct::dom_struct;
use euclid::{Point2D, Rect, Size2D};
use euclid::{RigidTransform3D, Rotation3D, Transform3D, Vector3D};
use ipc_channel::ipc::IpcSender;
use ipc_channel::router::ROUTER;
use profile_traits::ipc;
use std::rc::Rc;
use webxr_api::{MockDeviceMsg, View, Views};
#[dom_struct]
pub struct FakeXRDevice {
reflector: Reflector,
#[ignore_malloc_size_of = "defined in ipc-channel"]
sender: IpcSender<MockDeviceMsg>,
}
impl FakeXRDevice {
pub fn new_inherited(sender: IpcSender<MockDeviceMsg>) -> FakeXRDevice {
FakeXRDevice {
reflector: Reflector::new(),
sender,
}
}
pub fn new(global: &GlobalScope, sender: IpcSender<MockDeviceMsg>) -> DomRoot<FakeXRDevice> {
reflect_dom_object(
Box::new(FakeXRDevice::new_inherited(sender)),
global,
FakeXRDeviceBinding::Wrap,
)
}
pub fn disconnect(&self, sender: IpcSender<()>) {
let _ = self.sender.send(MockDeviceMsg::Disconnect(sender));
}
}
pub fn get_views(views: &[FakeXRViewInit]) -> Fallible<Views> {
if views.len() != 2 {
return Err(Error::NotSupported);
}
let (left, right) = match (views[0].eye, views[1].eye) {
(XREye::Left, XREye::Right) => (&views[0], &views[1]),
(XREye::Right, XREye::Left) => (&views[1], &views[0]),
_ => return Err(Error::NotSupported),
};
if left.projectionMatrix.len() != 16 ||
right.projectionMatrix.len() != 16 ||
left.viewOffset.position.len() != 3 ||
right.viewOffset.position.len() != 3
{
return Err(Error::Type("Incorrectly sized array".into()));
}
let mut proj_l = [0.; 16];
let mut proj_r = [0.; 16];
let v: Vec<_> = left.projectionMatrix.iter().map(|x| **x).collect();
proj_l.copy_from_slice(&v);
let proj_l = Transform3D::from_array(proj_l);
let v: Vec<_> = right.projectionMatrix.iter().map(|x| **x).collect();
proj_r.copy_from_slice(&v);
let proj_r = Transform3D::from_array(proj_r);
// spec defines offsets as origins, but mock API expects the inverse transform
let offset_l = get_origin(&left.viewOffset)?.inverse();
let offset_r = get_origin(&right.viewOffset)?.inverse();
let size_l = Size2D::new(views[0].resolution.width, views[0].resolution.height);
let size_r = Size2D::new(views[1].resolution.width, views[1].resolution.height);
let origin_l = Point2D::new(0, 0);
let origin_r = Point2D::new(size_l.width, 0);
let viewport_l = Rect::new(origin_l, size_l);
let viewport_r = Rect::new(origin_r, size_r);
let left = View {
projection: proj_l,
transform: offset_l,
viewport: viewport_l,
};
let right = View {
projection: proj_r,
transform: offset_r,
viewport: viewport_r,
};
Ok(Views::Stereo(left, right))
}
pub fn get_origin<T, U>(
origin: &FakeXRRigidTransformInit,
) -> Fallible<RigidTransform3D<f32, T, U>> {
if origin.position.len() != 3 || origin.orientation.len() != 4 {
return Err(Error::Type("Incorrectly sized array".into()));
}
let p = Vector3D::new(
*origin.position[0],
*origin.position[1],
*origin.position[2],
);
let o = Rotation3D::unit_quaternion(
*origin.orientation[0],
*origin.orientation[1],
*origin.orientation[2],
*origin.orientation[3],
);
Ok(RigidTransform3D::new(o, p))
}
impl FakeXRDeviceMethods for FakeXRDevice {
/// https://github.com/immersive-web/webxr-test-api/blob/master/explainer.md
fn SetViews(&self, views: Vec<FakeXRViewInit>) -> Fallible<()> {
let _ = self
.sender
.send(MockDeviceMsg::SetViews(get_views(&views)?));
Ok(())
}
/// https://github.com/immersive-web/webxr-test-api/blob/master/explainer.md
fn SetViewerOrigin(
&self,
origin: &FakeXRRigidTransformInit,
_emulated_position: bool,
) -> Fallible<()> {
let _ = self
.sender
.send(MockDeviceMsg::SetViewerOrigin(get_origin(origin)?));
Ok(())
}
/// https://github.com/immersive-web/webxr-test-api/blob/master/explainer.md
fn Disconnect(&self) -> Rc<Promise> {
let global = self.global();
let p = Promise::new(&global);
let mut trusted = Some(TrustedPromise::new(p.clone()));
let (task_source, canceller) = global
.as_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 |_| {
let trusted = trusted
.take()
.expect("disconnect callback called multiple times");
let _ = task_source.queue_with_canceller(trusted.resolve_task(()), &canceller);
}),
);
self.disconnect(sender);
p
}
}
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