Added first-cut implementation of XR layers

components/script/dom/webidls/XRLayer.webidl

@@ -0,0 +1,63 @@
+/* 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/layers/#xrlayertype
+[SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+interface XRLayer {
+  readonly attribute unsigned long pixelWidth;
+  readonly attribute unsigned long pixelHeight;
+
+//  attribute boolean blendTextureSourceAlpha;
+//  attribute boolean chromaticAberrationCorrection;
+
+  void destroy();
+};
+//
+// TODO: Implement the layer types
+//
+// [SecureContext, Exposed=Window, Pref="dom.webxr.enabled"]
+// interface XRProjectionLayer : XRLayer {
+//   readonly attribute boolean ignoreDepthValues;
+// };
+//
+// [SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+// interface XRQuadLayer : XRLayer {
+//   readonly attribute XRLayerLayout layout;
+//   attribute XRRigidTransform transform;
+//
+//   attribute float width;
+//   attribute float height;
+// };
+//
+// [SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+// interface XRCylinderLayer : XRLayer {
+//   readonly attribute XRLayerLayout layout;
+//   attribute XRReferenceSpace referenceSpace;
+//
+//   attribute XRRigidTransform transform;
+//   attribute float radius;
+//   attribute float centralAngle;
+//   attribute float aspectRatio;
+// };
+//
+// [SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+// interface XREquirectLayer : XRLayer {
+//   readonly attribute XRLayerLayout layout;
+//   attribute XRReferenceSpace referenceSpace;
+//
+//   attribute XRRigidTransform transform;
+//   attribute float radius;
+//   attribute float scaleX;
+//   attribute float scaleY;
+//   attribute float biasX;
+//   attribute float biasY;
+// };
+//
+// [SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+// interface XRCubeLayer : XRLayer {
+//   readonly attribute XRLayerLayout layout;
+//   attribute XRReferenceSpace referenceSpace;
+//
+//   attribute DOMPoint orientation;
+// };

components/script/dom/webidls/XRMediaBinding.webidl

@@ -0,0 +1,18 @@
+/* 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/layers/#xrmediabindingtype
+[SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+interface XRMediaBinding {
+  constructor(XRSession session);
+
+//  XRQuadLayer createQuadVideoLayer(HTMLVideoElement video, optional XRMediaLayerInit init = {});
+//  XRCylinderLayer createCylinderVideoLayer(HTMLVideoElement video, optional XRMediaLayerInit init = {});
+//  XREquirectLayer createEquirectVideoLayer(HTMLVideoElement video, optional XRMediaLayerInit init = {});
+};
+
+dictionary XRMediaLayerInit {
+  XRLayerLayout layout = "mono";
+  boolean invertStereo = false;
+};

components/script/dom/webidls/XRRenderState.webidl

@@ -2,6 +2,8 @@
  * 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/. */
 
+typedef (XRWebGLLayer or XRLayer) XRGenericLayer;
+
 // https://immersive-web.github.io/webxr/#xrrenderstate-interface
 
 dictionary XRRenderStateInit {
@@ -9,6 +11,7 @@ dictionary XRRenderStateInit {
   double depthFar;
   double inlineVerticalFieldOfView;
   XRWebGLLayer baseLayer;
+  sequence<XRGenericLayer> layers;
 };
 
 [SecureContext, Exposed=Window, Pref="dom.webxr.enabled"] interface XRRenderState {

components/script/dom/webidls/XRSubImage.webidl

@@ -0,0 +1,9 @@
+/* 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/layers/#xrsubimagetype
+[SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+interface XRSubImage {
+  readonly attribute XRViewport viewport;
+};

components/script/dom/webidls/XRWebGLBinding.webidl

@@ -0,0 +1,44 @@
+/* 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/layers/#XRWebGLBindingtype
+[SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+interface XRWebGLBinding {
+  constructor(XRSession session, XRWebGLRenderingContext context);
+
+//  readonly attribute double nativeProjectionScaleFactor;
+
+//  XRProjectionLayer createProjectionLayer(GLenum textureTarget, optional XRProjectionLayerInit init = {});
+//  XRQuadLayer createQuadLayer(GLenum textureTarget, XRLayerInit init);
+//  XRCylinderLayer createCylinderLayer(GLenum textureTarget, XRLayerInit init);
+//  XREquirectLayer createEquirectLayer(GLenum textureTarget, XRLayerInit init);
+//  XRCubeLayer createCubeLayer(XRLayerInit init);
+
+  XRWebGLSubImage? getSubImage(XRLayer layer, XRFrame frame); // for mono layers
+  XRWebGLSubImage? getViewSubImage(XRLayer layer, XRView view); // for stereo layers
+};
+
+dictionary XRProjectionLayerInit {
+  boolean depth = true;
+  boolean stencil = false;
+  boolean alpha = true;
+  double scaleFactor = 1.0;
+};
+
+dictionary XRLayerInit {
+  required unsigned long pixelWidth;
+  required unsigned long pixelHeight;
+  XRLayerLayout layout = "mono";
+  boolean depth = false; // This is a change from typical WebGL initialization, but feels appropriate.
+  boolean stencil = false;
+  boolean alpha = true;
+};
+
+enum XRLayerLayout {
+  "mono",
+  "stereo",
+  "stereo-left-right",
+  "stereo-top-bottom"
+};
+

components/script/dom/webidls/XRWebGLSubImage.webidl

@@ -0,0 +1,11 @@
+/* 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/layers/#xrwebglsubimagetype
+[SecureContext, Exposed=Window, Pref="dom.webxr.layers.enabled"]
+interface XRWebGLSubImage : XRSubImage {
+  readonly attribute WebGLTexture colorTexture;
+  readonly attribute WebGLTexture? depthStencilTexture;
+  readonly attribute unsigned long? imageIndex;
+};