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90 lines
3 KiB
Rust
90 lines
3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use crate::dom::bindings::codegen::Bindings::XRViewBinding::{XREye, XRViewMethods};
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use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
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use crate::dom::bindings::root::{Dom, DomRoot};
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use crate::dom::bindings::utils::create_typed_array;
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use crate::dom::globalscope::GlobalScope;
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use crate::dom::xrrigidtransform::XRRigidTransform;
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use crate::dom::xrsession::{cast_transform, ApiViewerPose, XRSession};
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use crate::script_runtime::JSContext;
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use dom_struct::dom_struct;
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use js::jsapi::{Heap, JSObject};
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use std::ptr::NonNull;
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use webxr_api::View;
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#[dom_struct]
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pub struct XRView {
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reflector_: Reflector,
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session: Dom<XRSession>,
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eye: XREye,
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#[ignore_malloc_size_of = "mozjs"]
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proj: Heap<*mut JSObject>,
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#[ignore_malloc_size_of = "mozjs"]
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view: Heap<*mut JSObject>,
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transform: Dom<XRRigidTransform>,
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}
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impl XRView {
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fn new_inherited(session: &XRSession, transform: &XRRigidTransform, eye: XREye) -> XRView {
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XRView {
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reflector_: Reflector::new(),
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session: Dom::from_ref(session),
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eye,
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proj: Heap::default(),
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view: Heap::default(),
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transform: Dom::from_ref(transform),
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}
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}
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pub fn new<V: Copy>(
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global: &GlobalScope,
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session: &XRSession,
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view: &View<V>,
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eye: XREye,
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pose: &ApiViewerPose,
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) -> DomRoot<XRView> {
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// XXXManishearth compute and cache projection matrices on the Display
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// this transform is the pose of the viewer in the eye space, i.e. it is the transform
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// from the viewer space to the eye space. We invert it to get the pose of the eye in the viewer space.
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let offset = view.transform.inverse();
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let transform = pose.pre_transform(&offset);
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let transform = XRRigidTransform::new(global, cast_transform(transform));
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let ret = reflect_dom_object(
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Box::new(XRView::new_inherited(session, &transform, eye)),
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global,
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);
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// row_major since euclid uses row vectors
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let proj = view.projection.to_row_major_array();
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let cx = global.get_cx();
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create_typed_array(cx, &proj, &ret.proj);
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ret
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}
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pub fn session(&self) -> &XRSession {
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&self.session
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}
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}
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impl XRViewMethods for XRView {
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/// https://immersive-web.github.io/webxr/#dom-xrview-eye
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fn Eye(&self) -> XREye {
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self.eye
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}
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/// https://immersive-web.github.io/webxr/#dom-xrview-projectionmatrix
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fn ProjectionMatrix(&self, _cx: JSContext) -> NonNull<JSObject> {
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NonNull::new(self.proj.get()).unwrap()
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}
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/// https://immersive-web.github.io/webxr/#dom-xrview-transform
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fn Transform(&self) -> DomRoot<XRRigidTransform> {
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DomRoot::from_ref(&self.transform)
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}
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}
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