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5466c27f6f
- Run `cargo fmt` on `webxr` and `webxr-api` - Fix clippy warnings in the existing `webxr` code - Integrate the new crates into the workspace - Expose `webxr` via the libservo API rather than requiring embedders to depend on it explicitly. Signed-off-by: Martin Robinson <mrobinson@igalia.com>
100 lines
3.1 KiB
Rust
100 lines
3.1 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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//! Traits to be implemented by backends
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use euclid::{Point2D, RigidTransform3D};
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use crate::{
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ContextId, EnvironmentBlendMode, Error, Event, Floor, Frame, HitTestId, HitTestSource,
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InputSource, LayerId, LayerInit, Native, Quitter, Sender, Session, SessionBuilder, SessionInit,
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SessionMode, Viewports,
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};
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/// A trait for discovering XR devices
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pub trait DiscoveryAPI<GL>: 'static {
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fn request_session(
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&mut self,
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mode: SessionMode,
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init: &SessionInit,
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xr: SessionBuilder<GL>,
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) -> Result<Session, Error>;
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fn supports_session(&self, mode: SessionMode) -> bool;
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}
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/// A trait for using an XR device
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pub trait DeviceAPI: 'static {
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/// Create a new layer
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fn create_layer(&mut self, context_id: ContextId, init: LayerInit) -> Result<LayerId, Error>;
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/// Destroy a layer
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fn destroy_layer(&mut self, context_id: ContextId, layer_id: LayerId);
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/// The transform from native coordinates to the floor.
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fn floor_transform(&self) -> Option<RigidTransform3D<f32, Native, Floor>>;
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fn viewports(&self) -> Viewports;
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/// Begin an animation frame.
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fn begin_animation_frame(&mut self, layers: &[(ContextId, LayerId)]) -> Option<Frame>;
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/// End an animation frame, render the layer to the device, and block waiting for the next frame.
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fn end_animation_frame(&mut self, layers: &[(ContextId, LayerId)]);
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/// Inputs registered with the device on initialization. More may be added, which
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/// should be communicated through a yet-undecided event mechanism
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fn initial_inputs(&self) -> Vec<InputSource>;
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/// Sets the event handling channel
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fn set_event_dest(&mut self, dest: Sender<Event>);
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/// Quit the session
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fn quit(&mut self);
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fn set_quitter(&mut self, quitter: Quitter);
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fn update_clip_planes(&mut self, near: f32, far: f32);
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fn environment_blend_mode(&self) -> EnvironmentBlendMode {
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// for VR devices, override for AR
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EnvironmentBlendMode::Opaque
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}
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fn granted_features(&self) -> &[String];
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fn request_hit_test(&mut self, _source: HitTestSource) {
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panic!("This device does not support requesting hit tests");
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}
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fn cancel_hit_test(&mut self, _id: HitTestId) {
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panic!("This device does not support hit tests");
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}
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fn update_frame_rate(&mut self, rate: f32) -> f32 {
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rate
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}
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fn supported_frame_rates(&self) -> Vec<f32> {
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Vec::new()
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}
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fn reference_space_bounds(&self) -> Option<Vec<Point2D<f32, Floor>>> {
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None
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}
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}
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impl<GL: 'static> DiscoveryAPI<GL> for Box<dyn DiscoveryAPI<GL>> {
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fn request_session(
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&mut self,
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mode: SessionMode,
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init: &SessionInit,
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xr: SessionBuilder<GL>,
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) -> Result<Session, Error> {
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(**self).request_session(mode, init, xr)
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}
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fn supports_session(&self, mode: SessionMode) -> bool {
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(**self).supports_session(mode)
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}
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}
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