forked from servo/servo
/
vrview.rs
90 lines (82 loc) · 3.52 KB
/
vrview.rs
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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 canvas_traits::webgl::{WebGLFramebufferId, WebGLMsg, WebGLMsgSender, WebVRCommand, WebVRDeviceId};
use dom::bindings::codegen::Bindings::VRViewBinding;
use dom::bindings::codegen::Bindings::VRViewBinding::{VRAttributes, VRViewMethods, VRViewport};
use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
use dom::bindings::root::{MutNullableDom, DomRoot};
use dom::globalscope::GlobalScope;
use dom_struct::dom_struct;
use dom::webglframebuffer::{OpaqueFBOMessages, WebGLFramebuffer};
use webvr_traits::WebVRFramebuffer;
#[dom_struct]
pub struct VRView {
reflector_: Reflector,
renderer: WebGLMsgSender,
device_id: WebVRDeviceId,
#[ignore_malloc_size_of = "Defined in rust-webvr"]
fbo: WebVRFramebuffer,
webgl_fbo: MutNullableDom<WebGLFramebuffer>,
}
impl VRView {
fn new_inherited(renderer: WebGLMsgSender,
device_id: WebVRDeviceId,
fbo: WebVRFramebuffer) -> VRView {
VRView {
reflector_: Reflector::new(),
renderer,
device_id,
fbo,
webgl_fbo: Default::default(),
}
}
pub fn new(global: &GlobalScope,
renderer: WebGLMsgSender,
device_id: WebVRDeviceId,
fbo: WebVRFramebuffer) -> DomRoot<VRView> {
reflect_dom_object(Box::new(VRView::new_inherited(renderer, device_id, fbo)),
global,
VRViewBinding::Wrap)
}
}
impl VRViewMethods for VRView {
// https://w3c.github.io/webvr/#interface-interface-vrfieldofview
#[allow(unsafe_code)]
fn Framebuffer(&self) -> DomRoot<WebGLFramebuffer> {
self.webgl_fbo.or_init(|| {
let fbo_id = unsafe {
// Generate a dummy FBO id that avoids collisions with the real WebGL FBOs.
WebGLFramebufferId::new(self.device_id * 1000 + self.fbo.eye_index)
};
let bind_msg = WebGLMsg::WebVRCommand(self.renderer.context_id(),
WebVRCommand::BindFramebuffer(self.device_id,
self.fbo.eye_index));
let unbind_msg = Some(WebGLMsg::WebVRCommand(self.renderer.context_id(),
WebVRCommand::UnbindFramebuffer(self.device_id,
self.fbo.eye_index)));
let opaque_messages = OpaqueFBOMessages {
bind_msg, unbind_msg
};
WebGLFramebuffer::new_opaque(self.global().as_window(),
self.renderer.clone(),
fbo_id,
opaque_messages)
})
}
fn GetViewport(&self) -> VRViewport {
VRViewport {
x: Some(self.fbo.viewport.x),
y: Some(self.fbo.viewport.y),
width: Some(self.fbo.viewport.width),
height: Some(self.fbo.viewport.height),
}
}
fn GetAttributes(&self) -> VRAttributes {
VRAttributes {
depth: self.fbo.attributes.depth,
multiview: self.fbo.attributes.multiview,
antialias: self.fbo.attributes.multisampling,
}
}
}