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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::VRFrameDataBinding;
use crate::dom::bindings::codegen::Bindings::VRFrameDataBinding::VRFrameDataMethods;
use crate::dom::bindings::error::Fallible;
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::globalscope::GlobalScope;
use crate::dom::vrpose::VRPose;
use crate::dom::window::Window;
use dom_struct::dom_struct;
use js::jsapi::{Heap, JSContext, JSObject};
use js::typedarray::{CreateWith, Float32Array};
use std::cell::Cell;
use std::ptr;
use std::ptr::NonNull;
use webvr_traits::WebVRFrameData;
#[dom_struct]
pub struct VRFrameData {
reflector_: Reflector,
#[ignore_malloc_size_of = "mozjs"]
left_proj: Heap<*mut JSObject>,
#[ignore_malloc_size_of = "mozjs"]
left_view: Heap<*mut JSObject>,
#[ignore_malloc_size_of = "mozjs"]
right_proj: Heap<*mut JSObject>,
#[ignore_malloc_size_of = "mozjs"]
right_view: Heap<*mut JSObject>,
pose: Dom<VRPose>,
timestamp: Cell<f64>,
first_timestamp: Cell<f64>,
}
impl VRFrameData {
fn new_inherited(pose: &VRPose) -> VRFrameData {
VRFrameData {
reflector_: Reflector::new(),
left_proj: Heap::default(),
left_view: Heap::default(),
right_proj: Heap::default(),
right_view: Heap::default(),
pose: Dom::from_ref(&*pose),
timestamp: Cell::new(0.0),
first_timestamp: Cell::new(0.0),
}
}
#[allow(unsafe_code)]
fn new(global: &GlobalScope) -> DomRoot<VRFrameData> {
let matrix = [
1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0f32,
];
let pose = VRPose::new(&global, &Default::default());
let root = reflect_dom_object(
Box::new(VRFrameData::new_inherited(&pose)),
global,
VRFrameDataBinding::Wrap,
);
let cx = global.get_cx();
unsafe {
create_typed_array(cx, &matrix, &root.left_proj);
create_typed_array(cx, &matrix, &root.left_view);
create_typed_array(cx, &matrix, &root.right_proj);
create_typed_array(cx, &matrix, &root.right_view);
}
root
}
pub fn Constructor(window: &Window) -> Fallible<DomRoot<VRFrameData>> {
Ok(VRFrameData::new(&window.global()))
}
}
/// FIXME(#22526) this should be in a better place
#[allow(unsafe_code)]
pub unsafe fn create_typed_array(cx: *mut JSContext, src: &[f32], dst: &Heap<*mut JSObject>) {
rooted!(in (cx) let mut array = ptr::null_mut::<JSObject>());
let _ = Float32Array::create(cx, CreateWith::Slice(src), array.handle_mut());
(*dst).set(array.get());
}
impl VRFrameData {
#[allow(unsafe_code)]
pub fn update(&self, data: &WebVRFrameData) {
unsafe {
let cx = self.global().get_cx();
typedarray!(in(cx) let left_proj_array: Float32Array = self.left_proj.get());
if let Ok(mut array) = left_proj_array {
array.update(&data.left_projection_matrix);
}
typedarray!(in(cx) let left_view_array: Float32Array = self.left_view.get());
if let Ok(mut array) = left_view_array {
array.update(&data.left_view_matrix);
}
typedarray!(in(cx) let right_proj_array: Float32Array = self.right_proj.get());
if let Ok(mut array) = right_proj_array {
array.update(&data.right_projection_matrix);
}
typedarray!(in(cx) let right_view_array: Float32Array = self.right_view.get());
if let Ok(mut array) = right_view_array {
array.update(&data.right_view_matrix);
}
}
self.pose.update(&data.pose);
self.timestamp.set(data.timestamp);
if self.first_timestamp.get() == 0.0 {
self.first_timestamp.set(data.timestamp);
}
}
}
impl VRFrameDataMethods for VRFrameData {
// https://w3c.github.io/webvr/#dom-vrframedata-timestamp
fn Timestamp(&self) -> Finite<f64> {
Finite::wrap(self.timestamp.get() - self.first_timestamp.get())
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrframedata-leftprojectionmatrix
unsafe fn LeftProjectionMatrix(&self, _cx: *mut JSContext) -> NonNull<JSObject> {
NonNull::new_unchecked(self.left_proj.get())
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrframedata-leftviewmatrix
unsafe fn LeftViewMatrix(&self, _cx: *mut JSContext) -> NonNull<JSObject> {
NonNull::new_unchecked(self.left_view.get())
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrframedata-rightprojectionmatrix
unsafe fn RightProjectionMatrix(&self, _cx: *mut JSContext) -> NonNull<JSObject> {
NonNull::new_unchecked(self.right_proj.get())
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrframedata-rightviewmatrix
unsafe fn RightViewMatrix(&self, _cx: *mut JSContext) -> NonNull<JSObject> {
NonNull::new_unchecked(self.right_view.get())
}
// https://w3c.github.io/webvr/#dom-vrframedata-pose
fn Pose(&self) -> DomRoot<VRPose> {
DomRoot::from_ref(&*self.pose)
}
}
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