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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::XRViewBinding;
use crate::dom::bindings::codegen::Bindings::XRViewBinding::{XREye, XRViewMethods};
use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::globalscope::GlobalScope;
use crate::dom::vrframedata::create_typed_array;
use crate::dom::xrsession::XRSession;
use dom_struct::dom_struct;
use euclid::Transform3D;
use js::jsapi::{Heap, JSContext, JSObject};
use std::ptr::NonNull;
use webvr_traits::WebVRFrameData;
#[dom_struct]
pub struct XRView {
reflector_: Reflector,
session: Dom<XRSession>,
eye: XREye,
proj: Heap<*mut JSObject>,
view: Heap<*mut JSObject>,
}
impl XRView {
fn new_inherited(session: &XRSession, eye: XREye) -> XRView {
XRView {
reflector_: Reflector::new(),
session: Dom::from_ref(session),
eye,
proj: Heap::default(),
view: Heap::default(),
}
}
#[allow(unsafe_code)]
pub fn new(
global: &GlobalScope,
session: &XRSession,
eye: XREye,
pose: &Transform3D<f64>,
data: &WebVRFrameData,
) -> DomRoot<XRView> {
let ret = reflect_dom_object(
Box::new(XRView::new_inherited(session, eye)),
global,
XRViewBinding::Wrap,
);
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(),
)
} else {
(
&data.right_projection_matrix,
vr_display.right_eye_params_offset(),
)
};
let offset =
Transform3D::create_translation(offset[0] as f64, offset[1] as f64, offset[2] as f64);
let view = pose.post_mul(&offset).cast().to_column_major_array();
let cx = global.get_cx();
unsafe {
create_typed_array(cx, proj, &ret.proj);
create_typed_array(cx, &view, &ret.view);
}
ret
}
pub fn session(&self) -> &XRSession {
&self.session
}
}
impl XRViewMethods for XRView {
/// https://immersive-web.github.io/webxr/#dom-xrview-eye
fn Eye(&self) -> XREye {
self.eye
}
#[allow(unsafe_code)]
/// https://immersive-web.github.io/webxr/#dom-xrview-projectionmatrix
unsafe fn ProjectionMatrix(&self, _cx: *mut JSContext) -> NonNull<JSObject> {
NonNull::new(self.proj.get()).unwrap()
}
#[allow(unsafe_code)]
/// https://immersive-web.github.io/webxr/#dom-xrview-projectionmatrix
unsafe fn ViewMatrix(&self, _cx: *mut JSContext) -> NonNull<JSObject> {
NonNull::new(self.view.get()).unwrap()
}
}
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