Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 665 insertions, 0 deletions

diff --git a/gfx/vr/VRDisplayClient.cpp b/gfx/vr/VRDisplayClient.cpp
new file mode 100644
index 0000000000..002bbefaef
--- /dev/null
+++ b/gfx/vr/VRDisplayClient.cpp
@@ -0,0 +1,665 @@
+/* -*- 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 <math.h>
+
+#include "prlink.h"
+#include "prenv.h"
+
+#include "nsIGlobalObject.h"
+#include "nsRefPtrHashtable.h"
+#include "nsString.h"
+#include "mozilla/dom/GamepadHandle.h"
+#include "mozilla/dom/GamepadManager.h"
+#include "mozilla/dom/Gamepad.h"
+#include "mozilla/dom/XRSession.h"
+#include "mozilla/dom/XRInputSourceArray.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Unused.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/dom/WebXRBinding.h"
+#include "nsServiceManagerUtils.h"
+
+#ifdef XP_WIN
+#  include "../layers/d3d11/CompositorD3D11.h"
+#endif
+
+#include "VRDisplayClient.h"
+#include "VRDisplayPresentation.h"
+#include "VRManagerChild.h"
+#include "VRLayerChild.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+using mozilla::dom::GamepadHandle;
+using mozilla::dom::GamepadHandleKind;
+
+VRDisplayClient::VRDisplayClient(const VRDisplayInfo& aDisplayInfo)
+    : mDisplayInfo(aDisplayInfo),
+      bLastEventWasMounted(false),
+      bLastEventWasPresenting(false),
+      mPresentationCount(0),
+      mLastEventFrameId(0),
+      mLastPresentingGeneration(0),
+      mLastEventControllerState{},
+      // For now WebVR is default to prevent a VRDisplay restore bug in WebVR
+      // compatibility mode. See Bug 1630512
+      mAPIMode(VRAPIMode::WebVR) {
+  MOZ_COUNT_CTOR(VRDisplayClient);
+}
+
+VRDisplayClient::~VRDisplayClient() { MOZ_COUNT_DTOR(VRDisplayClient); }
+
+void VRDisplayClient::UpdateDisplayInfo(const VRDisplayInfo& aDisplayInfo) {
+  mDisplayInfo = aDisplayInfo;
+  FireEvents();
+}
+
+already_AddRefed<VRDisplayPresentation> VRDisplayClient::BeginPresentation(
+    const nsTArray<mozilla::dom::VRLayer>& aLayers, uint32_t aGroup) {
+  PresentationCreated();
+  RefPtr<VRDisplayPresentation> presentation =
+      new VRDisplayPresentation(this, aLayers, aGroup);
+  return presentation.forget();
+}
+
+void VRDisplayClient::PresentationCreated() { ++mPresentationCount; }
+
+void VRDisplayClient::PresentationDestroyed() { --mPresentationCount; }
+
+void VRDisplayClient::SessionStarted(dom::XRSession* aSession) {
+  PresentationCreated();
+  MakePresentationGenerationCurrent();
+  mSessions.AppendElement(aSession);
+}
+void VRDisplayClient::SessionEnded(dom::XRSession* aSession) {
+  mSessions.RemoveElement(aSession);
+  PresentationDestroyed();
+}
+
+void VRDisplayClient::StartFrame() {
+  RefPtr<VRManagerChild> vm = VRManagerChild::Get();
+  vm->RunFrameRequestCallbacks();
+
+  nsTArray<RefPtr<dom::XRSession>> sessions;
+  sessions.AppendElements(mSessions);
+  for (auto session : sessions) {
+    session->StartFrame();
+  }
+}
+
+void VRDisplayClient::SetGroupMask(uint32_t aGroupMask) {
+  VRManagerChild* vm = VRManagerChild::Get();
+  vm->SendSetGroupMask(mDisplayInfo.mDisplayID, aGroupMask);
+}
+
+bool VRDisplayClient::IsPresentationGenerationCurrent() const {
+  if (mLastPresentingGeneration !=
+      mDisplayInfo.mDisplayState.presentingGeneration) {
+    return false;
+  }
+
+  return true;
+}
+
+void VRDisplayClient::MakePresentationGenerationCurrent() {
+  mLastPresentingGeneration = mDisplayInfo.mDisplayState.presentingGeneration;
+}
+
+gfx::VRAPIMode VRDisplayClient::GetXRAPIMode() const { return mAPIMode; }
+
+void VRDisplayClient::SetXRAPIMode(gfx::VRAPIMode aMode) {
+  mAPIMode = aMode;
+  Telemetry::Accumulate(Telemetry::WEBXR_API_MODE,
+                        static_cast<uint32_t>(mAPIMode));
+}
+
+void VRDisplayClient::FireEvents() {
+  RefPtr<VRManagerChild> vm = VRManagerChild::Get();
+  // Only fire these events for non-chrome VR sessions
+  bool isPresenting = (mDisplayInfo.mPresentingGroups & kVRGroupContent) != 0;
+
+  // Check if we need to trigger onVRDisplayPresentChange event
+  if (bLastEventWasPresenting != isPresenting) {
+    bLastEventWasPresenting = isPresenting;
+    vm->FireDOMVRDisplayPresentChangeEvent(mDisplayInfo.mDisplayID);
+  }
+
+  // Check if we need to trigger onvrdisplayactivate event
+  if (!bLastEventWasMounted && mDisplayInfo.mDisplayState.isMounted) {
+    bLastEventWasMounted = true;
+    if (StaticPrefs::dom_vr_autoactivate_enabled()) {
+      vm->FireDOMVRDisplayMountedEvent(mDisplayInfo.mDisplayID);
+    }
+  }
+
+  // Check if we need to trigger onvrdisplaydeactivate event
+  if (bLastEventWasMounted && !mDisplayInfo.mDisplayState.isMounted) {
+    bLastEventWasMounted = false;
+    if (StaticPrefs::dom_vr_autoactivate_enabled()) {
+      vm->FireDOMVRDisplayUnmountedEvent(mDisplayInfo.mDisplayID);
+    }
+  }
+
+  if (mLastPresentingGeneration !=
+      mDisplayInfo.mDisplayState.presentingGeneration) {
+    mLastPresentingGeneration = mDisplayInfo.mDisplayState.presentingGeneration;
+    vm->NotifyPresentationGenerationChanged(mDisplayInfo.mDisplayID);
+  }
+
+  // In WebXR spec, Gamepad instances returned by an XRInputSource's gamepad
+  // attribute MUST NOT be included in the array returned by
+  // navigator.getGamepads().
+  if (mAPIMode == VRAPIMode::WebVR) {
+    FireGamepadEvents();
+  }
+  // Update controller states into XRInputSourceArray.
+  for (auto& session : mSessions) {
+    dom::XRInputSourceArray* inputs = session->InputSources();
+    if (inputs) {
+      inputs->Update(session);
+    }
+  }
+
+  // Check if we need to trigger VRDisplay.requestAnimationFrame
+  if (mLastEventFrameId != mDisplayInfo.mFrameId) {
+    mLastEventFrameId = mDisplayInfo.mFrameId;
+    StartFrame();
+  }
+}
+
+void VRDisplayClient::GamepadMappingForWebVR(
+    VRControllerState& aControllerState) {
+  float triggerValue[kVRControllerMaxButtons];
+  memcpy(triggerValue, aControllerState.triggerValue,
+         sizeof(aControllerState.triggerValue));
+  const uint64_t buttonPressed = aControllerState.buttonPressed;
+  const uint64_t buttonTouched = aControllerState.buttonTouched;
+
+  auto SetTriggerValue = [&](uint64_t newSlot, uint64_t oldSlot) {
+    aControllerState.triggerValue[newSlot] = triggerValue[oldSlot];
+  };
+  auto ShiftButtonBitForNewSlot = [&](uint64_t newSlot, uint64_t oldSlot,
+                                      bool aIsTouch = false) {
+    if (aIsTouch) {
+      return ((buttonTouched & (1ULL << oldSlot)) != 0) * (1ULL << newSlot);
+    }
+    SetTriggerValue(newSlot, oldSlot);
+    return ((buttonPressed & (1ULL << oldSlot)) != 0) * (1ULL << newSlot);
+  };
+
+  switch (aControllerState.type) {
+    case VRControllerType::HTCVive:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(1, 0) | ShiftButtonBitForNewSlot(2, 1) |
+          ShiftButtonBitForNewSlot(0, 2) | ShiftButtonBitForNewSlot(3, 4);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 1, true) |
+                                       ShiftButtonBitForNewSlot(2, 1, true) |
+                                       ShiftButtonBitForNewSlot(0, 2, true) |
+                                       ShiftButtonBitForNewSlot(3, 4, true);
+      aControllerState.numButtons = 4;
+      aControllerState.numAxes = 2;
+      break;
+    case VRControllerType::MSMR:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(1, 0) | ShiftButtonBitForNewSlot(2, 1) |
+          ShiftButtonBitForNewSlot(0, 2) | ShiftButtonBitForNewSlot(3, 3) |
+          ShiftButtonBitForNewSlot(4, 4);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(1, 0, true) |
+                                       ShiftButtonBitForNewSlot(2, 1, true) |
+                                       ShiftButtonBitForNewSlot(0, 2, true) |
+                                       ShiftButtonBitForNewSlot(3, 3, true) |
+                                       ShiftButtonBitForNewSlot(4, 4, true);
+      aControllerState.numButtons = 5;
+      aControllerState.numAxes = 4;
+      break;
+    case VRControllerType::HTCViveCosmos:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(0, 0) | ShiftButtonBitForNewSlot(1, 1) |
+          ShiftButtonBitForNewSlot(4, 3) | ShiftButtonBitForNewSlot(2, 4) |
+          ShiftButtonBitForNewSlot(3, 5) | ShiftButtonBitForNewSlot(5, 6);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 0, true) |
+                                       ShiftButtonBitForNewSlot(1, 1, true) |
+                                       ShiftButtonBitForNewSlot(4, 3, true) |
+                                       ShiftButtonBitForNewSlot(2, 4, true) |
+                                       ShiftButtonBitForNewSlot(3, 5, true) |
+                                       ShiftButtonBitForNewSlot(5, 6, true);
+      aControllerState.axisValue[0] = aControllerState.axisValue[2];
+      aControllerState.axisValue[1] = aControllerState.axisValue[3];
+      aControllerState.numButtons = 6;
+      aControllerState.numAxes = 2;
+      break;
+    case VRControllerType::HTCViveFocus:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(0, 2) | ShiftButtonBitForNewSlot(1, 0);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 2, true) |
+                                       ShiftButtonBitForNewSlot(1, 0, true);
+      aControllerState.numButtons = 2;
+      aControllerState.numAxes = 2;
+      break;
+    case VRControllerType::HTCViveFocusPlus: {
+      aControllerState.buttonPressed = ShiftButtonBitForNewSlot(0, 2) |
+                                       ShiftButtonBitForNewSlot(1, 0) |
+                                       ShiftButtonBitForNewSlot(2, 1);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 2, true) |
+                                       ShiftButtonBitForNewSlot(1, 0, true) |
+                                       ShiftButtonBitForNewSlot(2, 1, true);
+      aControllerState.numButtons = 3;
+      aControllerState.numAxes = 2;
+
+      static Matrix4x4 focusPlusTransform;
+      Matrix4x4 originalMtx;
+      if (focusPlusTransform.IsIdentity()) {
+        focusPlusTransform.RotateX(-0.70f);
+        focusPlusTransform.PostTranslate(0.0f, 0.0f, 0.01f);
+        focusPlusTransform.Inverse();
+      }
+      gfx::Quaternion quat(aControllerState.pose.orientation[0],
+                           aControllerState.pose.orientation[1],
+                           aControllerState.pose.orientation[2],
+                           aControllerState.pose.orientation[3]);
+      originalMtx.SetRotationFromQuaternion(quat);
+      originalMtx._41 = aControllerState.pose.position[0];
+      originalMtx._42 = aControllerState.pose.position[1];
+      originalMtx._43 = aControllerState.pose.position[2];
+      originalMtx = focusPlusTransform * originalMtx;
+
+      gfx::Point3D pos, scale;
+      originalMtx.Decompose(pos, quat, scale);
+
+      aControllerState.pose.position[0] = pos.x;
+      aControllerState.pose.position[1] = pos.y;
+      aControllerState.pose.position[2] = pos.z;
+
+      aControllerState.pose.orientation[0] = quat.x;
+      aControllerState.pose.orientation[1] = quat.y;
+      aControllerState.pose.orientation[2] = quat.z;
+      aControllerState.pose.orientation[3] = quat.w;
+      break;
+    }
+    case VRControllerType::OculusGo: {
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(0, 2) | ShiftButtonBitForNewSlot(1, 0);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 2, true) |
+                                       ShiftButtonBitForNewSlot(1, 0, true);
+      aControllerState.numButtons = 2;
+      aControllerState.numAxes = 2;
+
+      static Matrix4x4 goTransform;
+      Matrix4x4 originalMtx;
+
+      if (goTransform.IsIdentity()) {
+        goTransform.RotateX(-0.60f);
+        goTransform.Inverse();
+      }
+      gfx::Quaternion quat(aControllerState.pose.orientation[0],
+                           aControllerState.pose.orientation[1],
+                           aControllerState.pose.orientation[2],
+                           aControllerState.pose.orientation[3]);
+      originalMtx.SetRotationFromQuaternion(quat);
+      originalMtx._41 = aControllerState.pose.position[0];
+      originalMtx._42 = aControllerState.pose.position[1];
+      originalMtx._43 = aControllerState.pose.position[2];
+      originalMtx = goTransform * originalMtx;
+
+      gfx::Point3D pos, scale;
+      originalMtx.Decompose(pos, quat, scale);
+
+      aControllerState.pose.position[0] = pos.x;
+      aControllerState.pose.position[1] = pos.y;
+      aControllerState.pose.position[2] = pos.z;
+
+      aControllerState.pose.orientation[0] = quat.x;
+      aControllerState.pose.orientation[1] = quat.y;
+      aControllerState.pose.orientation[2] = quat.z;
+      aControllerState.pose.orientation[3] = quat.w;
+      break;
+    }
+    case VRControllerType::OculusTouch:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(0, 3) | ShiftButtonBitForNewSlot(1, 0) |
+          ShiftButtonBitForNewSlot(2, 1) | ShiftButtonBitForNewSlot(3, 4) |
+          ShiftButtonBitForNewSlot(4, 5) | ShiftButtonBitForNewSlot(5, 6);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 3, true) |
+                                       ShiftButtonBitForNewSlot(1, 0, true) |
+                                       ShiftButtonBitForNewSlot(2, 1, true) |
+                                       ShiftButtonBitForNewSlot(3, 4, true) |
+                                       ShiftButtonBitForNewSlot(4, 5, true) |
+                                       ShiftButtonBitForNewSlot(5, 6, true);
+      aControllerState.axisValue[0] = aControllerState.axisValue[2];
+      aControllerState.axisValue[1] = aControllerState.axisValue[3];
+      aControllerState.numButtons = 6;
+      aControllerState.numAxes = 2;
+      break;
+    case VRControllerType::OculusTouch2: {
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(0, 3) | ShiftButtonBitForNewSlot(1, 0) |
+          ShiftButtonBitForNewSlot(2, 1) | ShiftButtonBitForNewSlot(3, 4) |
+          ShiftButtonBitForNewSlot(4, 5) | ShiftButtonBitForNewSlot(5, 6);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 3, true) |
+                                       ShiftButtonBitForNewSlot(1, 0, true) |
+                                       ShiftButtonBitForNewSlot(2, 1, true) |
+                                       ShiftButtonBitForNewSlot(3, 4, true) |
+                                       ShiftButtonBitForNewSlot(4, 5, true) |
+                                       ShiftButtonBitForNewSlot(5, 6, true);
+      aControllerState.axisValue[0] = aControllerState.axisValue[2];
+      aControllerState.axisValue[1] = aControllerState.axisValue[3];
+      aControllerState.numButtons = 6;
+      aControllerState.numAxes = 2;
+
+      static Matrix4x4 touch2Transform;
+      Matrix4x4 originalMtx;
+
+      if (touch2Transform.IsIdentity()) {
+        touch2Transform.RotateX(-0.77f);
+        touch2Transform.PostTranslate(0.0f, 0.0f, -0.025f);
+        touch2Transform.Inverse();
+      }
+      gfx::Quaternion quat(aControllerState.pose.orientation[0],
+                           aControllerState.pose.orientation[1],
+                           aControllerState.pose.orientation[2],
+                           aControllerState.pose.orientation[3]);
+      originalMtx.SetRotationFromQuaternion(quat);
+      originalMtx._41 = aControllerState.pose.position[0];
+      originalMtx._42 = aControllerState.pose.position[1];
+      originalMtx._43 = aControllerState.pose.position[2];
+      originalMtx = touch2Transform * originalMtx;
+
+      gfx::Point3D pos, scale;
+      originalMtx.Decompose(pos, quat, scale);
+
+      aControllerState.pose.position[0] = pos.x;
+      aControllerState.pose.position[1] = pos.y;
+      aControllerState.pose.position[2] = pos.z;
+
+      aControllerState.pose.orientation[0] = quat.x;
+      aControllerState.pose.orientation[1] = quat.y;
+      aControllerState.pose.orientation[2] = quat.z;
+      aControllerState.pose.orientation[3] = quat.w;
+      break;
+    }
+    case VRControllerType::ValveIndex:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(1, 0) | ShiftButtonBitForNewSlot(2, 1) |
+          ShiftButtonBitForNewSlot(0, 2) | ShiftButtonBitForNewSlot(5, 3) |
+          ShiftButtonBitForNewSlot(3, 4) | ShiftButtonBitForNewSlot(4, 5) |
+          ShiftButtonBitForNewSlot(6, 6) | ShiftButtonBitForNewSlot(7, 7) |
+          ShiftButtonBitForNewSlot(8, 8) | ShiftButtonBitForNewSlot(9, 9);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(1, 0, true) |
+                                       ShiftButtonBitForNewSlot(2, 1, true) |
+                                       ShiftButtonBitForNewSlot(0, 2, true) |
+                                       ShiftButtonBitForNewSlot(5, 3, true) |
+                                       ShiftButtonBitForNewSlot(3, 4, true) |
+                                       ShiftButtonBitForNewSlot(4, 5, true) |
+                                       ShiftButtonBitForNewSlot(6, 6, true) |
+                                       ShiftButtonBitForNewSlot(7, 7, true) |
+                                       ShiftButtonBitForNewSlot(8, 8, true) |
+                                       ShiftButtonBitForNewSlot(9, 9, true);
+      aControllerState.numButtons = 10;
+      aControllerState.numAxes = 4;
+      break;
+    case VRControllerType::PicoGaze:
+      aControllerState.buttonPressed = ShiftButtonBitForNewSlot(0, 0);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 0, true);
+      aControllerState.numButtons = 1;
+      aControllerState.numAxes = 0;
+      break;
+    case VRControllerType::PicoG2:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(0, 2) | ShiftButtonBitForNewSlot(1, 0);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 2, true) |
+                                       ShiftButtonBitForNewSlot(1, 0, true);
+      aControllerState.numButtons = 2;
+      aControllerState.numAxes = 2;
+      break;
+    case VRControllerType::PicoNeo2:
+      aControllerState.buttonPressed =
+          ShiftButtonBitForNewSlot(0, 3) | ShiftButtonBitForNewSlot(1, 0) |
+          ShiftButtonBitForNewSlot(2, 1) | ShiftButtonBitForNewSlot(3, 4) |
+          ShiftButtonBitForNewSlot(4, 5) | ShiftButtonBitForNewSlot(5, 6);
+      aControllerState.buttonTouched = ShiftButtonBitForNewSlot(0, 3, true) |
+                                       ShiftButtonBitForNewSlot(1, 0, true) |
+                                       ShiftButtonBitForNewSlot(2, 1, true) |
+                                       ShiftButtonBitForNewSlot(3, 4, true) |
+                                       ShiftButtonBitForNewSlot(4, 5, true) |
+                                       ShiftButtonBitForNewSlot(5, 6, true);
+      aControllerState.axisValue[0] = aControllerState.axisValue[2];
+      aControllerState.axisValue[1] = aControllerState.axisValue[3];
+      aControllerState.numButtons = 6;
+      aControllerState.numAxes = 2;
+      break;
+    default:
+      // Undefined controller types, we will keep its the same order.
+      break;
+  }
+}
+
+void VRDisplayClient::FireGamepadEvents() {
+  RefPtr<dom::GamepadManager> gamepadManager(dom::GamepadManager::GetService());
+  if (!gamepadManager) {
+    return;
+  }
+  for (int stateIndex = 0; stateIndex < kVRControllerMaxCount; stateIndex++) {
+    VRControllerState state = {}, lastState = {};
+    memcpy(&state, &mDisplayInfo.mControllerState[stateIndex],
+           sizeof(VRControllerState));
+    memcpy(&lastState, &mLastEventControllerState[stateIndex],
+           sizeof(VRControllerState));
+    GamepadMappingForWebVR(state);
+    GamepadMappingForWebVR(lastState);
+
+    uint32_t gamepadHandleValue =
+        mDisplayInfo.mDisplayID * kVRControllerMaxCount + stateIndex;
+
+    GamepadHandle gamepadHandle{gamepadHandleValue, GamepadHandleKind::VR};
+
+    bool bIsNew = false;
+
+    // Send events to notify that controllers are removed
+    if (state.controllerName[0] == '\0') {
+      // Controller is not present
+      if (lastState.controllerName[0] != '\0') {
+        // Controller has been removed
+        dom::GamepadRemoved info;
+        dom::GamepadChangeEventBody body(info);
+        dom::GamepadChangeEvent event(gamepadHandle, body);
+        gamepadManager->Update(event);
+      }
+      // Do not process any further events for removed controllers
+      continue;
+    }
+
+    // Send events to notify that new controllers are added
+    RefPtr<dom::Gamepad> existing = gamepadManager->GetGamepad(gamepadHandle);
+    // ControllerState in OpenVR action-based API gets delay to query btn and
+    // axis count. So, we need to check if they are more than zero.
+    if ((lastState.controllerName[0] == '\0' || !existing) &&
+        (state.numButtons > 0 || state.numAxes > 0)) {
+      dom::GamepadAdded info(NS_ConvertUTF8toUTF16(state.controllerName),
+                             dom::GamepadMappingType::_empty, state.hand,
+                             mDisplayInfo.mDisplayID, state.numButtons,
+                             state.numAxes, state.numHaptics, 0, 0);
+      dom::GamepadChangeEventBody body(info);
+      dom::GamepadChangeEvent event(gamepadHandle, body);
+      gamepadManager->Update(event);
+      bIsNew = true;
+    }
+
+    // Send events for handedness changes
+    if (state.hand != lastState.hand) {
+      dom::GamepadHandInformation info(state.hand);
+      dom::GamepadChangeEventBody body(info);
+      dom::GamepadChangeEvent event(gamepadHandle, body);
+      gamepadManager->Update(event);
+    }
+
+    // Send events for axis value changes
+    for (uint32_t axisIndex = 0; axisIndex < state.numAxes; axisIndex++) {
+      if (state.axisValue[axisIndex] != lastState.axisValue[axisIndex]) {
+        dom::GamepadAxisInformation info(axisIndex, state.axisValue[axisIndex]);
+        dom::GamepadChangeEventBody body(info);
+        dom::GamepadChangeEvent event(gamepadHandle, body);
+        gamepadManager->Update(event);
+      }
+    }
+
+    // Send events for trigger, touch, and button value changes
+    if (!bIsNew) {
+      // When a new controller is added, we do not emit button events for
+      // the initial state of the inputs.
+      for (uint32_t buttonIndex = 0; buttonIndex < state.numButtons;
+           buttonIndex++) {
+        bool bPressed = (state.buttonPressed & (1ULL << buttonIndex)) != 0;
+        bool bTouched = (state.buttonTouched & (1ULL << buttonIndex)) != 0;
+        bool bLastPressed =
+            (lastState.buttonPressed & (1ULL << buttonIndex)) != 0;
+        bool bLastTouched =
+            (lastState.buttonTouched & (1ULL << buttonIndex)) != 0;
+
+        if (state.triggerValue[buttonIndex] !=
+                lastState.triggerValue[buttonIndex] ||
+            bPressed != bLastPressed || bTouched != bLastTouched) {
+          dom::GamepadButtonInformation info(
+              buttonIndex, state.triggerValue[buttonIndex], bPressed, bTouched);
+          dom::GamepadChangeEventBody body(info);
+          dom::GamepadChangeEvent event(gamepadHandle, body);
+          gamepadManager->Update(event);
+        }
+      }
+    }
+
+    // Send events for pose changes
+    // Note that VRPose is asserted to be a POD type so memcmp is safe
+    if (state.flags != lastState.flags ||
+        state.isPositionValid != lastState.isPositionValid ||
+        state.isOrientationValid != lastState.isOrientationValid ||
+        memcmp(&state.pose, &lastState.pose, sizeof(VRPose)) != 0) {
+      // Convert pose to GamepadPoseState
+      dom::GamepadPoseState poseState;
+      poseState.Clear();
+      poseState.flags = state.flags;
+
+      // Orientation values
+      poseState.isOrientationValid = state.isOrientationValid;
+      poseState.orientation[0] = state.pose.orientation[0];
+      poseState.orientation[1] = state.pose.orientation[1];
+      poseState.orientation[2] = state.pose.orientation[2];
+      poseState.orientation[3] = state.pose.orientation[3];
+      poseState.angularVelocity[0] = state.pose.angularVelocity[0];
+      poseState.angularVelocity[1] = state.pose.angularVelocity[1];
+      poseState.angularVelocity[2] = state.pose.angularVelocity[2];
+      poseState.angularAcceleration[0] = state.pose.angularAcceleration[0];
+      poseState.angularAcceleration[1] = state.pose.angularAcceleration[1];
+      poseState.angularAcceleration[2] = state.pose.angularAcceleration[2];
+
+      // Position values
+      poseState.isPositionValid = state.isPositionValid;
+      poseState.position[0] = state.pose.position[0];
+      poseState.position[1] = state.pose.position[1];
+      poseState.position[2] = state.pose.position[2];
+      poseState.linearVelocity[0] = state.pose.linearVelocity[0];
+      poseState.linearVelocity[1] = state.pose.linearVelocity[1];
+      poseState.linearVelocity[2] = state.pose.linearVelocity[2];
+      poseState.linearAcceleration[0] = state.pose.linearAcceleration[0];
+      poseState.linearAcceleration[1] = state.pose.linearAcceleration[1];
+      poseState.linearAcceleration[2] = state.pose.linearAcceleration[2];
+
+      // Send the event
+      dom::GamepadPoseInformation info(poseState);
+      dom::GamepadChangeEventBody body(info);
+      dom::GamepadChangeEvent event(gamepadHandle, body);
+      gamepadManager->Update(event);
+    }
+  }
+
+  // Note that VRControllerState is asserted to be a POD type and memcpy is
+  // safe.
+  memcpy(mLastEventControllerState, mDisplayInfo.mControllerState,
+         sizeof(VRControllerState) * kVRControllerMaxCount);
+}
+
+const VRHMDSensorState& VRDisplayClient::GetSensorState() const {
+  return mDisplayInfo.GetSensorState();
+}
+
+bool VRDisplayClient::GetIsConnected() const {
+  return mDisplayInfo.GetIsConnected();
+}
+
+bool VRDisplayClient::IsPresenting() {
+  return mDisplayInfo.mPresentingGroups != 0;
+}
+
+void VRDisplayClient::NotifyDisconnected() {
+  mDisplayInfo.mDisplayState.isConnected = false;
+}
+
+void VRDisplayClient::UpdateSubmitFrameResult(
+    const VRSubmitFrameResultInfo& aResult) {
+  mSubmitFrameResult = aResult;
+}
+
+void VRDisplayClient::GetSubmitFrameResult(VRSubmitFrameResultInfo& aResult) {
+  aResult = mSubmitFrameResult;
+}
+
+void VRDisplayClient::StartVRNavigation() {
+  /**
+   * A VR-to-VR site navigation has started, notify VRManager
+   * so we don't drop out of VR during the transition
+   */
+  VRManagerChild* vm = VRManagerChild::Get();
+  vm->SendStartVRNavigation(mDisplayInfo.mDisplayID);
+}
+
+void VRDisplayClient::StopVRNavigation(const TimeDuration& aTimeout) {
+  /**
+   * A VR-to-VR site navigation has ended and the new site
+   * has received a vrdisplayactivate event.
+   * Don't actually consider the navigation transition over
+   * until aTimeout has elapsed.
+   * This may be called multiple times, in which case the timeout
+   * should be reset to aTimeout.
+   * When aTimeout is TimeDuration(0), we should consider the
+   * transition immediately ended.
+   */
+  VRManagerChild* vm = VRManagerChild::Get();
+  vm->SendStopVRNavigation(mDisplayInfo.mDisplayID, aTimeout);
+}
+
+bool VRDisplayClient::IsReferenceSpaceTypeSupported(
+    dom::XRReferenceSpaceType aType) const {
+  /**
+   * https://immersive-web.github.io/webxr/#reference-space-is-supported
+   *
+   * We do not yet support local or local-floor for inline sessions.
+   * This could be expanded if we later support WebXR for inline-ar
+   * sessions on Firefox Fenix.
+   *
+   * We do not yet support unbounded reference spaces.
+   */
+  switch (aType) {
+    case dom::XRReferenceSpaceType::Viewer:
+      // Viewer is always supported, for both inline and immersive sessions
+      return true;
+    case dom::XRReferenceSpaceType::Local:
+    case dom::XRReferenceSpaceType::Local_floor:
+      // Local and Local_Floor are always supported for immersive sessions
+      return bool(mDisplayInfo.GetCapabilities() &
+                  (VRDisplayCapabilityFlags::Cap_ImmersiveVR |
+                   VRDisplayCapabilityFlags::Cap_ImmersiveAR));
+    case dom::XRReferenceSpaceType::Bounded_floor:
+      return bool(mDisplayInfo.GetCapabilities() &
+                  VRDisplayCapabilityFlags::Cap_StageParameters);
+    default:
+      NS_WARNING(
+          "Unknown XRReferenceSpaceType passed to "
+          "VRDisplayClient::IsReferenceSpaceTypeSupported");
+      return false;
+  }
+}