WebVR API Implementation, r=larsbergstrom

components/script/dom/vreyeparameters.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 core::nonzero::NonZero;
+use dom::bindings::cell::DOMRefCell;
+use dom::bindings::codegen::Bindings::VREyeParametersBinding;
+use dom::bindings::codegen::Bindings::VREyeParametersBinding::VREyeParametersMethods;
+use dom::bindings::conversions::slice_to_array_buffer_view;
+use dom::bindings::js::{JS, Root};
+use dom::bindings::reflector::{Reflector, reflect_dom_object};
+use dom::globalscope::GlobalScope;
+use dom::vrfieldofview::VRFieldOfView;
+use js::jsapi::{Heap, JSContext, JSObject};
+use std::default::Default;
+use webvr_traits::WebVREyeParameters;
+
+#[dom_struct]
+pub struct VREyeParameters {
+    reflector_: Reflector,
+    #[ignore_heap_size_of = "Defined in rust-webvr"]
+    parameters: DOMRefCell<WebVREyeParameters>,
+    offset: Heap<*mut JSObject>,
+    fov: JS<VRFieldOfView>,
+}
+
+unsafe_no_jsmanaged_fields!(WebVREyeParameters);
+
+impl VREyeParameters {
+    #[allow(unsafe_code)]
+    #[allow(unrooted_must_root)]
+    fn new_inherited(parameters: WebVREyeParameters, global: &GlobalScope) -> VREyeParameters {
+        let fov = VRFieldOfView::new(&global, parameters.field_of_view.clone());
+        let mut result = VREyeParameters {
+            reflector_: Reflector::new(),
+            parameters: DOMRefCell::new(parameters),
+            offset: Heap::default(),
+            fov: JS::from_ref(&*fov)
+        };
+
+        unsafe {
+            result.offset.set(slice_to_array_buffer_view(global.get_cx(), &result.parameters.borrow().offset));
+        }
+        result
+    }
+
+    pub fn new(parameters: WebVREyeParameters, global: &GlobalScope) -> Root<VREyeParameters> {
+        reflect_dom_object(box VREyeParameters::new_inherited(parameters, global),
+                           global,
+                           VREyeParametersBinding::Wrap)
+    }
+}
+
+impl VREyeParametersMethods for VREyeParameters {
+    #[allow(unsafe_code)]
+    // https://w3c.github.io/webvr/#dom-vreyeparameters-offset
+    unsafe fn Offset(&self, _cx: *mut JSContext) -> NonZero<*mut JSObject> {
+        NonZero::new(self.offset.get())
+    }
+
+    // https://w3c.github.io/webvr/#dom-vreyeparameters-fieldofview
+    fn FieldOfView(&self) -> Root<VRFieldOfView> {
+        Root::from_ref(&*self.fov)
+    }
+
+    // https://w3c.github.io/webvr/#dom-vreyeparameters-renderwidth
+    fn RenderWidth(&self) -> u32 {
+        self.parameters.borrow().render_width
+    }
+
+    // https://w3c.github.io/webvr/#dom-vreyeparameters-renderheight
+    fn RenderHeight(&self) -> u32 {
+        self.parameters.borrow().render_height
+    }
+}