From 70e8a1920011de2ef697bb7d3fff127e263703da Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Thu, 20 Dec 2018 16:49:14 -0800
Subject: [PATCH] Fill in some of XRWebGLLayer

---
 .../script/dom/webidls/XRWebGLLayer.webidl    | 25 ++++----
 components/script/dom/xrwebgllayer.rs         | 61 +++++++++++++++++--
 2 files changed, 69 insertions(+), 17 deletions(-)

diff --git a/components/script/dom/webidls/XRWebGLLayer.webidl b/components/script/dom/webidls/XRWebGLLayer.webidl
index 7a9bddf1687..8f66ac625d9 100644
--- a/components/script/dom/webidls/XRWebGLLayer.webidl
+++ b/components/script/dom/webidls/XRWebGLLayer.webidl
@@ -4,29 +4,30 @@
 
 // https://immersive-web.github.io/webxr/#xrwebgllayer-interface
 
-typedef (WebGLRenderingContext or
-         WebGL2RenderingContext) XRWebGLRenderingContext;
+// typedef (WebGLRenderingContext or
+//          WebGL2RenderingContext) XRWebGLRenderingContext;
+
+typedef WebGLRenderingContext XRWebGLRenderingContext;
 
 dictionary XRWebGLLayerInit {
   boolean antialias = true;
   boolean depth = true;
   boolean stencil = false;
   boolean alpha = true;
-  double framebufferScaleFactor = 1.0;
+  // double framebufferScaleFactor = 1.0;
 };
 
-[SecureContext, Exposed=Window]
-// [Constructor(XRSession session,
-//             XRWebGLRenderingContext context,
-//             optional XRWebGLLayerInit layerInit)]
+[SecureContext, Exposed=Window, Constructor(XRSession session,
+            XRWebGLRenderingContext context,
+            optional XRWebGLLayerInit layerInit)]
 interface XRWebGLLayer : XRLayer {
   // // Attributes
-  // readonly attribute XRWebGLRenderingContext context;
+  readonly attribute XRWebGLRenderingContext context;
 
-  // readonly attribute boolean antialias;
-  // readonly attribute boolean depth;
-  // readonly attribute boolean stencil;
-  // readonly attribute boolean alpha;
+  readonly attribute boolean antialias;
+  readonly attribute boolean depth;
+  readonly attribute boolean stencil;
+  readonly attribute boolean alpha;
 
   // readonly attribute WebGLFramebuffer framebuffer;
   // readonly attribute unsigned long framebufferWidth;
diff --git a/components/script/dom/xrwebgllayer.rs b/components/script/dom/xrwebgllayer.rs
index 2c550c4fef4..a34e6913d9e 100644
--- a/components/script/dom/xrwebgllayer.rs
+++ b/components/script/dom/xrwebgllayer.rs
@@ -3,29 +3,80 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 use crate::dom::bindings::codegen::Bindings::XRWebGLLayerBinding;
-use crate::dom::bindings::reflector::reflect_dom_object;
-use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::codegen::Bindings::XRWebGLLayerBinding::XRWebGLLayerMethods;
+use crate::dom::bindings::codegen::Bindings::XRWebGLLayerBinding::XRWebGLLayerInit;
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::reflector::{DomObject, reflect_dom_object};
+use crate::dom::bindings::root::{Dom, DomRoot};
 use crate::dom::globalscope::GlobalScope;
+use crate::dom::webglrenderingcontext::WebGLRenderingContext;
+use crate::dom::window::Window;
 use crate::dom::xrlayer::XRLayer;
+use crate::dom::xrsession::XRSession;
 use dom_struct::dom_struct;
 
+use std::cell::Cell;
+
 #[dom_struct]
 pub struct XRWebGLLayer {
     xrlayer: XRLayer,
+    antialias: Cell<bool>,
+    depth: Cell<bool>,
+    stencil: Cell<bool>,
+    alpha: Cell<bool>,
+    context: Dom<WebGLRenderingContext>,
+    session: Dom<XRSession>,
 }
 
 impl XRWebGLLayer {
-    pub fn new_inherited() -> XRWebGLLayer {
+    pub fn new_inherited(session: &XRSession, context: &WebGLRenderingContext,
+                         init: &XRWebGLLayerInit) -> XRWebGLLayer {
         XRWebGLLayer {
             xrlayer: XRLayer::new_inherited(),
+            antialias: Cell::new(init.antialias),
+            depth: Cell::new(init.depth),
+            stencil: Cell::new(init.stencil),
+            alpha: Cell::new(init.alpha),
+            context: Dom::from_ref(context),
+            session: Dom::from_ref(session),
         }
     }
 
-    pub fn new(global: &GlobalScope) -> DomRoot<XRWebGLLayer> {
+    pub fn new(global: &GlobalScope, session: &XRSession, context: &WebGLRenderingContext,
+               init: &XRWebGLLayerInit) -> DomRoot<XRWebGLLayer> {
         reflect_dom_object(
-            Box::new(XRWebGLLayer::new_inherited()),
+            Box::new(XRWebGLLayer::new_inherited(session, context, init)),
             global,
             XRWebGLLayerBinding::Wrap,
         )
     }
+
+    pub fn Constructor(global: &Window, session: &XRSession, 
+                       context: &WebGLRenderingContext,
+                       init: &XRWebGLLayerInit) -> Fallible<DomRoot<Self>> {
+        Ok(XRWebGLLayer::new(&global.global(), session, context, init))
+    }
 }
+
+impl XRWebGLLayerMethods for XRWebGLLayer {
+    fn Depth(&self) -> bool {
+        self.depth.get()
+    }
+
+    fn Stencil(&self) -> bool {
+        self.stencil.get()
+    }
+
+    fn Antialias(&self) -> bool {
+        self.antialias.get()
+    }
+
+    fn Alpha(&self) -> bool {
+        self.alpha.get()
+    }
+
+    fn Context(&self) -> DomRoot<WebGLRenderingContext> {
+        DomRoot::from_ref(&self.context)
+    }
+}
+