Added first-cut implementation of XR layers

1 files changed, 44 insertions, 0 deletions

diff --git a/components/script/dom/webidls/XRWebGLBinding.webidl b/components/script/dom/webidls/XRWebGLBinding.webidl
new file mode 100644
index 00000000000..08617561b36
--- /dev/null
+++ b/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"
+};
+