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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 http://mozilla.org/MPL/2.0/. */
use core::nonzero::NonZero;
use dom::bindings::codegen::Bindings::VRPoseBinding;
use dom::bindings::codegen::Bindings::VRPoseBinding::VRPoseMethods;
use dom::bindings::js::Root;
use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
use dom::globalscope::GlobalScope;
use dom_struct::dom_struct;
use js::jsapi::{Heap, JSContext, JSObject};
use js::typedarray::{Float32Array, CreateWith};
use std::ptr;
use webvr_traits::webvr;
#[dom_struct]
pub struct VRPose {
reflector_: Reflector,
position: Heap<*mut JSObject>,
orientation: Heap<*mut JSObject>,
linear_vel: Heap<*mut JSObject>,
angular_vel: Heap<*mut JSObject>,
linear_acc: Heap<*mut JSObject>,
angular_acc: Heap<*mut JSObject>,
}
#[allow(unsafe_code)]
unsafe fn update_or_create_typed_array(cx: *mut JSContext,
src: Option<&[f32]>,
dst: &Heap<*mut JSObject>) {
match src {
Some(data) => {
if dst.get().is_null() {
let _ = Float32Array::create(cx, CreateWith::Slice(data), dst.handle_mut());
} else {
typedarray!(in(cx) let array: Float32Array = dst.get());
if let Ok(mut array) = array {
array.update(data);
}
}
},
None => {
if !dst.get().is_null() {
dst.set(ptr::null_mut());
}
}
}
}
#[inline]
#[allow(unsafe_code)]
fn heap_to_option(heap: &Heap<*mut JSObject>) -> Option<NonZero<*mut JSObject>> {
let js_object = heap.get();
if js_object.is_null() {
None
} else {
unsafe {
Some(NonZero::new(js_object))
}
}
}
impl VRPose {
fn new_inherited() -> VRPose {
VRPose {
reflector_: Reflector::new(),
position: Heap::default(),
orientation: Heap::default(),
linear_vel: Heap::default(),
angular_vel: Heap::default(),
linear_acc: Heap::default(),
angular_acc: Heap::default(),
}
}
pub fn new(global: &GlobalScope, pose: &webvr::VRPose) -> Root<VRPose> {
let root = reflect_dom_object(box VRPose::new_inherited(),
global,
VRPoseBinding::Wrap);
root.update(&pose);
root
}
#[allow(unsafe_code)]
pub fn update(&self, pose: &webvr::VRPose) {
let cx = self.global().get_cx();
unsafe {
update_or_create_typed_array(cx, pose.position.as_ref().map(|v| &v[..]), &self.position);
update_or_create_typed_array(cx, pose.orientation.as_ref().map(|v| &v[..]), &self.orientation);
update_or_create_typed_array(cx, pose.linear_velocity.as_ref().map(|v| &v[..]), &self.linear_vel);
update_or_create_typed_array(cx, pose.angular_velocity.as_ref().map(|v| &v[..]), &self.angular_vel);
update_or_create_typed_array(cx, pose.linear_acceleration.as_ref().map(|v| &v[..]), &self.linear_acc);
update_or_create_typed_array(cx, pose.angular_acceleration.as_ref().map(|v| &v[..]), &self.angular_acc);
}
}
}
impl VRPoseMethods for VRPose {
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrpose-position
unsafe fn GetPosition(&self, _cx: *mut JSContext) -> Option<NonZero<*mut JSObject>> {
heap_to_option(&self.position)
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrpose-linearvelocity
unsafe fn GetLinearVelocity(&self, _cx: *mut JSContext) -> Option<NonZero<*mut JSObject>> {
heap_to_option(&self.linear_vel)
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrpose-linearacceleration
unsafe fn GetLinearAcceleration(&self, _cx: *mut JSContext) -> Option<NonZero<*mut JSObject>> {
heap_to_option(&self.linear_acc)
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrpose-orientation
unsafe fn GetOrientation(&self, _cx: *mut JSContext) -> Option<NonZero<*mut JSObject>> {
heap_to_option(&self.orientation)
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrpose-angularvelocity
unsafe fn GetAngularVelocity(&self, _cx: *mut JSContext) -> Option<NonZero<*mut JSObject>> {
heap_to_option(&self.angular_vel)
}
#[allow(unsafe_code)]
// https://w3c.github.io/webvr/#dom-vrpose-angularacceleration
unsafe fn GetAngularAcceleration(&self, _cx: *mut JSContext) -> Option<NonZero<*mut JSObject>> {
heap_to_option(&self.angular_acc)
}
}
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