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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 std::cell::Cell;
use dom_struct::dom_struct;
use webxr_api::{Frame, LayerId, SubImages};
use crate::dom::bindings::codegen::Bindings::XRFrameBinding::XRFrameMethods;
use crate::dom::bindings::error::Error;
use crate::dom::bindings::inheritance::Castable;
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::xrhittestresult::XRHitTestResult;
use crate::dom::xrhittestsource::XRHitTestSource;
use crate::dom::xrjointpose::XRJointPose;
use crate::dom::xrjointspace::XRJointSpace;
use crate::dom::xrpose::XRPose;
use crate::dom::xrreferencespace::XRReferenceSpace;
use crate::dom::xrsession::{ApiPose, XRSession};
use crate::dom::xrspace::XRSpace;
use crate::dom::xrviewerpose::XRViewerPose;
#[dom_struct]
pub struct XRFrame {
reflector_: Reflector,
session: Dom<XRSession>,
#[ignore_malloc_size_of = "defined in webxr_api"]
#[no_trace]
data: Frame,
active: Cell<bool>,
animation_frame: Cell<bool>,
}
impl XRFrame {
fn new_inherited(session: &XRSession, data: Frame) -> XRFrame {
XRFrame {
reflector_: Reflector::new(),
session: Dom::from_ref(session),
data,
active: Cell::new(false),
animation_frame: Cell::new(false),
}
}
pub fn new(global: &GlobalScope, session: &XRSession, data: Frame) -> DomRoot<XRFrame> {
reflect_dom_object(Box::new(XRFrame::new_inherited(session, data)), global)
}
/// <https://immersive-web.github.io/webxr/#xrframe-active>
pub fn set_active(&self, active: bool) {
self.active.set(active);
}
/// <https://immersive-web.github.io/webxr/#xrframe-animationframe>
pub fn set_animation_frame(&self, animation_frame: bool) {
self.animation_frame.set(animation_frame);
}
pub fn get_pose(&self, space: &XRSpace) -> Option<ApiPose> {
space.get_pose(&self.data)
}
pub fn get_sub_images(&self, layer_id: LayerId) -> Option<&SubImages> {
self.data
.sub_images
.iter()
.find(|sub_images| sub_images.layer_id == layer_id)
}
}
impl XRFrameMethods for XRFrame {
/// <https://immersive-web.github.io/webxr/#dom-xrframe-session>
fn Session(&self) -> DomRoot<XRSession> {
DomRoot::from_ref(&self.session)
}
/// <https://immersive-web.github.io/webxr/#dom-xrframe-getviewerpose>
fn GetViewerPose(
&self,
reference: &XRReferenceSpace,
) -> Result<Option<DomRoot<XRViewerPose>>, Error> {
if self.session != reference.upcast::<XRSpace>().session() {
return Err(Error::InvalidState);
}
if !self.active.get() || !self.animation_frame.get() {
return Err(Error::InvalidState);
}
let to_base = if let Some(to_base) = reference.get_base_transform(&self.data) {
to_base
} else {
return Ok(None);
};
let viewer_pose = if let Some(pose) = self.data.pose.as_ref() {
pose
} else {
return Ok(None);
};
Ok(Some(XRViewerPose::new(
&self.global(),
&self.session,
to_base,
viewer_pose,
)))
}
/// <https://immersive-web.github.io/webxr/#dom-xrframe-getpose>
fn GetPose(
&self,
space: &XRSpace,
relative_to: &XRSpace,
) -> Result<Option<DomRoot<XRPose>>, Error> {
if self.session != space.session() || self.session != relative_to.session() {
return Err(Error::InvalidState);
}
if !self.active.get() {
return Err(Error::InvalidState);
}
let space = if let Some(space) = self.get_pose(space) {
space
} else {
return Ok(None);
};
let relative_to = if let Some(r) = self.get_pose(relative_to) {
r
} else {
return Ok(None);
};
let pose = space.then(&relative_to.inverse());
Ok(Some(XRPose::new(&self.global(), pose)))
}
/// <https://immersive-web.github.io/webxr/#dom-xrframe-getpose>
fn GetJointPose(
&self,
space: &XRJointSpace,
relative_to: &XRSpace,
) -> Result<Option<DomRoot<XRJointPose>>, Error> {
if self.session != space.upcast::<XRSpace>().session() ||
self.session != relative_to.session()
{
return Err(Error::InvalidState);
}
if !self.active.get() {
return Err(Error::InvalidState);
}
let joint_frame = if let Some(frame) = space.frame(&self.data) {
frame
} else {
return Ok(None);
};
let relative_to = if let Some(r) = self.get_pose(relative_to) {
r
} else {
return Ok(None);
};
let pose = joint_frame.pose.then(&relative_to.inverse());
Ok(Some(XRJointPose::new(
&self.global(),
pose.cast_unit(),
Some(joint_frame.radius),
)))
}
/// <https://immersive-web.github.io/hit-test/#dom-xrframe-gethittestresults>
fn GetHitTestResults(&self, source: &XRHitTestSource) -> Vec<DomRoot<XRHitTestResult>> {
self.data
.hit_test_results
.iter()
.filter(|r| r.id == source.id())
.map(|r| XRHitTestResult::new(&self.global(), *r, self))
.collect()
}
}
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