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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 dom_struct::dom_struct;
use euclid::RigidTransform3D;
use js::typedarray::{Float32, Float32Array};
use webxr_api::{ApiSpace, View};
use super::bindings::buffer_source::HeapBufferSource;
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::xrrigidtransform::XRRigidTransform;
use crate::dom::xrsession::{cast_transform, BaseSpace, BaseTransform, XRSession};
use crate::script_runtime::JSContext;
#[dom_struct]
pub struct XRView {
reflector_: Reflector,
session: Dom<XRSession>,
eye: XREye,
viewport_index: usize,
#[ignore_malloc_size_of = "mozjs"]
proj: HeapBufferSource<Float32>,
#[ignore_malloc_size_of = "defined in rust-webxr"]
#[no_trace]
view: View<ApiSpace>,
transform: Dom<XRRigidTransform>,
}
impl XRView {
fn new_inherited(
session: &XRSession,
transform: &XRRigidTransform,
eye: XREye,
viewport_index: usize,
view: View<ApiSpace>,
) -> XRView {
XRView {
reflector_: Reflector::new(),
session: Dom::from_ref(session),
eye,
viewport_index,
proj: HeapBufferSource::default(),
view,
transform: Dom::from_ref(transform),
}
}
pub fn new<V: Copy>(
global: &GlobalScope,
session: &XRSession,
view: &View<V>,
eye: XREye,
viewport_index: usize,
to_base: &BaseTransform,
) -> DomRoot<XRView> {
let transform: RigidTransform3D<f32, V, BaseSpace> = view.transform.then(to_base);
let transform = XRRigidTransform::new(global, cast_transform(transform));
reflect_dom_object(
Box::new(XRView::new_inherited(
session,
&transform,
eye,
viewport_index,
view.cast_unit(),
)),
global,
)
}
pub fn session(&self) -> &XRSession {
&self.session
}
pub fn viewport_index(&self) -> usize {
self.viewport_index
}
}
impl XRViewMethods for XRView {
/// <https://immersive-web.github.io/webxr/#dom-xrview-eye>
fn Eye(&self) -> XREye {
self.eye
}
/// <https://immersive-web.github.io/webxr/#dom-xrview-projectionmatrix>
fn ProjectionMatrix(&self, _cx: JSContext) -> Float32Array {
if !self.proj.is_initialized() {
let cx = GlobalScope::get_cx();
// row_major since euclid uses row vectors
let proj = self.view.projection.to_array();
self.proj
.set_data(cx, &proj)
.expect("Failed to set projection matrix.")
}
self.proj
.get_buffer()
.expect("Failed to get projection matrix.")
}
/// <https://immersive-web.github.io/webxr/#dom-xrview-transform>
fn Transform(&self) -> DomRoot<XRRigidTransform> {
DomRoot::from_ref(&self.transform)
}
}
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