1 files changed, 79 insertions, 0 deletions
diff --git a/dom/vr/XRView.cpp b/dom/vr/XRView.cpp
new file mode 100644
index 0000000000..c1ff18004e
--- /dev/null
+++ b/dom/vr/XRView.cpp
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/XRView.h"
+
+#include "mozilla/HoldDropJSObjects.h"
+#include "mozilla/dom/XRRigidTransform.h"
+#include "mozilla/dom/Pose.h"
+#include "nsWrapperCache.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_WITH_JS_MEMBERS(XRView,
+                                                      (mParent, mTransform),
+                                                      (mJSProjectionMatrix))
+
+XRView::XRView(nsISupports* aParent, const XREye& aEye)
+    : mParent(aParent),
+      mEye(aEye),
+
+      mJSProjectionMatrix(nullptr) {
+  mozilla::HoldJSObjects(this);
+}
+
+XRView::~XRView() { mozilla::DropJSObjects(this); }
+
+JSObject* XRView::WrapObject(JSContext* aCx,
+                             JS::Handle<JSObject*> aGivenProto) {
+  return XRView_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+void XRView::Update(const gfx::PointDouble3D& aPosition,
+                    const gfx::QuaternionDouble& aOrientation,
+                    const gfx::Matrix4x4& aProjectionMatrix) {
+  mPosition = aPosition;
+  mOrientation = aOrientation;
+  mProjectionMatrix = aProjectionMatrix;
+  if (mTransform) {
+    mTransform->Update(aPosition, aOrientation);
+  }
+  if (aProjectionMatrix != mProjectionMatrix) {
+    mProjectionNeedsUpdate = true;
+    mProjectionMatrix = aProjectionMatrix;
+  }
+}
+
+XREye XRView::Eye() const { return mEye; }
+
+void XRView::GetProjectionMatrix(JSContext* aCx,
+                                 JS::MutableHandle<JSObject*> aRetval,
+                                 ErrorResult& aRv) {
+  if (!mJSProjectionMatrix || mProjectionNeedsUpdate) {
+    mProjectionNeedsUpdate = false;
+    gfx::Matrix4x4 mat;
+
+    Pose::SetFloat32Array(aCx, this, aRetval, mJSProjectionMatrix,
+                          mProjectionMatrix.components, 16, aRv);
+    if (!mJSProjectionMatrix) {
+      return;
+    }
+  }
+  if (mJSProjectionMatrix) {
+    JS::ExposeObjectToActiveJS(mJSProjectionMatrix);
+  }
+  aRetval.set(mJSProjectionMatrix);
+}
+
+already_AddRefed<XRRigidTransform> XRView::GetTransform(ErrorResult& aRv) {
+  if (!mTransform) {
+    mTransform = new XRRigidTransform(mParent, mPosition, mOrientation);
+  }
+  RefPtr<XRRigidTransform> transform = mTransform;
+  return transform.forget();
+}
+
+}  // namespace mozilla::dom