Basic XRFrame interface

components/script/dom/webidls/XRWebGLLayer.webidl

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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/. */
+
+// https://immersive-web.github.io/webxr/#xrwebgllayer-interface
+
+typedef (WebGLRenderingContext or
+         WebGL2RenderingContext) XRWebGLRenderingContext;
+
+dictionary XRWebGLLayerInit {
+  boolean antialias = true;
+  boolean depth = true;
+  boolean stencil = false;
+  boolean alpha = true;
+  double framebufferScaleFactor = 1.0;
+};
+
+[SecureContext, Exposed=Window]
+// [Constructor(XRSession session,
+//             XRWebGLRenderingContext context,
+//             optional XRWebGLLayerInit layerInit)]
+interface XRWebGLLayer : XRLayer {
+  // // Attributes
+  // readonly attribute XRWebGLRenderingContext context;
+
+  // 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;
+  // readonly attribute unsigned long framebufferHeight;
+
+  // // Methods
+  // XRViewport? getViewport(XRView view);
+  // void requestViewportScaling(double viewportScaleFactor);
+
+  // // Static Methods
+  // static double getNativeFramebufferScaleFactor(XRSession session);
+};