Auto merge of #27224 - asajeffrey:webxr-glwindow-spherical, r=Manishearth

Add support for webxr cubemap and spherical 360 rendering

<!-- Please describe your changes on the following line: -->

Part of rendering webxr content as 360 video

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because it's back-end rendering

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Cargo.lock

@@ -6778,7 +6778,7 @@ dependencies = [
 [[package]]
 name = "webxr"
 version = "0.0.1"
-source = "git+https://github.com/servo/webxr#88f287d639710dbc1a41c83600d947911b78480d"
+source = "git+https://github.com/servo/webxr#de60f3ebe01b1e829393c980a6126924b5f60075"
 dependencies = [
  "android_injected_glue",
  "bindgen",
@@ -6801,7 +6801,7 @@ dependencies = [
 [[package]]
 name = "webxr-api"
 version = "0.0.1"
-source = "git+https://github.com/servo/webxr#88f287d639710dbc1a41c83600d947911b78480d"
+source = "git+https://github.com/servo/webxr#de60f3ebe01b1e829393c980a6126924b5f60075"
 dependencies = [
  "euclid",
  "ipc-channel",

components/config/prefs.rs

@@ -272,6 +272,8 @@ mod gen {
                         left_right: bool,
                         #[serde(rename = "dom.webxr.glwindow.red-cyan")]
                         red_cyan: bool,
+                        spherical: bool,
+                        cubemap: bool,
                     },
                     hands: {
                         #[serde(default)]

components/script/dom/xrviewerpose.rs

@@ -105,6 +105,49 @@ impl XRViewerPose {
                     &to_base,
                 ));
             },
+            Views::Cubemap(front, left, right, top, bottom, back) => {
+                views.push(XRView::new(
+                    global,
+                    session,
+                    &front,
+                    XREye::None,
+                    0,
+                    &to_base,
+                ));
+                views.push(XRView::new(
+                    global,
+                    session,
+                    &left,
+                    XREye::None,
+                    1,
+                    &to_base,
+                ));
+                views.push(XRView::new(
+                    global,
+                    session,
+                    &right,
+                    XREye::None,
+                    2,
+                    &to_base,
+                ));
+                views.push(XRView::new(global, session, &top, XREye::None, 3, &to_base));
+                views.push(XRView::new(
+                    global,
+                    session,
+                    &bottom,
+                    XREye::None,
+                    4,
+                    &to_base,
+                ));
+                views.push(XRView::new(
+                    global,
+                    session,
+                    &back,
+                    XREye::None,
+                    5,
+                    &to_base,
+                ));
+            },
         };
         let transform: RigidTransform3D<f32, Viewer, BaseSpace> =
             to_base.pre_transform(&viewer_pose.transform);

ports/winit/headed_window.rs

@@ -684,6 +684,10 @@ impl webxr::glwindow::GlWindow for XRWindow {
             webxr::glwindow::GlWindowMode::StereoRedCyan
         } else if pref!(dom.webxr.glwindow.left_right) {
             webxr::glwindow::GlWindowMode::StereoLeftRight
+        } else if pref!(dom.webxr.glwindow.spherical) {
+            webxr::glwindow::GlWindowMode::Spherical
+        } else if pref!(dom.webxr.glwindow.cubemap) {
+            webxr::glwindow::GlWindowMode::Cubemap
         } else {
             webxr::glwindow::GlWindowMode::Blit
         }

resources/prefs.json

@@ -34,9 +34,11 @@
   "dom.webvr.test": false,
   "dom.webvtt.enabled": false,
   "dom.webxr.enabled": true,
+  "dom.webxr.glwindow.cubemap": false,
   "dom.webxr.glwindow.enabled": true,
   "dom.webxr.glwindow.left-right": false,
   "dom.webxr.glwindow.red-cyan": false,
+  "dom.webxr.glwindow.spherical": false,
   "dom.webxr.hands.enabled": false,
   "dom.webxr.layers.enabled": false,
   "dom.webxr.test": false,