1 files changed, 162 insertions, 0 deletions
diff --git a/gfx/vr/gfxVR.h b/gfx/vr/gfxVR.h
new file mode 100644
index 0000000000..d4d772b6a2
--- /dev/null
+++ b/gfx/vr/gfxVR.h
@@ -0,0 +1,162 @@
+/* -*- 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/. */
+
+#ifndef GFX_VR_H
+#define GFX_VR_H
+
+#include "moz_external_vr.h"
+#include "nsTArray.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/EnumeratedArray.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/TypedEnumBits.h"
+#include <type_traits>
+
+namespace mozilla {
+namespace layers {
+class PTextureParent;
+}
+namespace dom {
+enum class GamepadMappingType : uint8_t;
+enum class GamepadHand : uint8_t;
+}  // namespace dom
+namespace gfx {
+enum class VRAPIMode : uint8_t { WebXR, WebVR, NumVRAPIModes };
+
+class VRLayerParent;
+class VRDisplayHost;
+class VRManagerPromise;
+
+// The maximum number of frames of latency that we would expect before we
+// should give up applying pose prediction.
+// If latency is greater than one second, then the experience is not likely
+// to be corrected by pose prediction.  Setting this value too
+// high may result in unnecessary memory allocation.
+// As the current fastest refresh rate is 90hz, 100 is selected as a
+// conservative value.
+static const int kVRMaxLatencyFrames = 100;
+
+struct VRDisplayInfo {
+  uint32_t mDisplayID;
+  uint32_t mPresentingGroups;
+  uint32_t mGroupMask;
+  uint64_t mFrameId;
+  VRDisplayState mDisplayState;
+  VRControllerState mControllerState[kVRControllerMaxCount];
+
+  VRHMDSensorState mLastSensorState[kVRMaxLatencyFrames];
+  void Clear() { memset(this, 0, sizeof(VRDisplayInfo)); }
+  const VRHMDSensorState& GetSensorState() const {
+    return mLastSensorState[mFrameId % kVRMaxLatencyFrames];
+  }
+
+  uint32_t GetDisplayID() const { return mDisplayID; }
+  const char* GetDisplayName() const { return mDisplayState.displayName; }
+  VRDisplayCapabilityFlags GetCapabilities() const {
+    return mDisplayState.capabilityFlags;
+  }
+
+  const IntSize SuggestedEyeResolution() const;
+  const Point3D GetEyeTranslation(uint32_t whichEye) const;
+  const VRFieldOfView& GetEyeFOV(uint32_t whichEye) const {
+    return mDisplayState.eyeFOV[whichEye];
+  }
+  bool GetIsConnected() const { return mDisplayState.isConnected; }
+  bool GetIsMounted() const { return mDisplayState.isMounted; }
+  uint32_t GetPresentingGroups() const { return mPresentingGroups; }
+  uint32_t GetGroupMask() const { return mGroupMask; }
+  const Size GetStageSize() const;
+  const Matrix4x4 GetSittingToStandingTransform() const;
+  uint64_t GetFrameId() const { return mFrameId; }
+
+  bool operator==(const VRDisplayInfo& other) const {
+    for (size_t i = 0; i < kVRMaxLatencyFrames; i++) {
+      if (mLastSensorState[i] != other.mLastSensorState[i]) {
+        return false;
+      }
+    }
+    // Note that mDisplayState and mControllerState are asserted to be POD
+    // types, so memcmp is safe
+    return mDisplayID == other.mDisplayID &&
+           memcmp(&mDisplayState, &other.mDisplayState,
+                  sizeof(VRDisplayState)) == 0 &&
+           memcmp(mControllerState, other.mControllerState,
+                  sizeof(VRControllerState) * kVRControllerMaxCount) == 0 &&
+           mPresentingGroups == other.mPresentingGroups &&
+           mGroupMask == other.mGroupMask && mFrameId == other.mFrameId;
+  }
+
+  bool operator!=(const VRDisplayInfo& other) const {
+    return !(*this == other);
+  }
+};
+
+static_assert(std::is_pod<VRDisplayInfo>::value,
+              "VRDisplayInfo must be a POD type.");
+
+struct VRSubmitFrameResultInfo {
+  VRSubmitFrameResultInfo()
+      : mFormat(SurfaceFormat::UNKNOWN), mFrameNum(0), mWidth(0), mHeight(0) {}
+
+  nsCString mBase64Image;
+  SurfaceFormat mFormat;
+  uint64_t mFrameNum;
+  uint32_t mWidth;
+  uint32_t mHeight;
+};
+
+struct VRControllerInfo {
+  uint32_t GetControllerID() const { return mControllerID; }
+  const char* GetControllerName() const {
+    return mControllerState.controllerName;
+  }
+  dom::GamepadMappingType GetMappingType() const { return mMappingType; }
+  uint32_t GetDisplayID() const { return mDisplayID; }
+  dom::GamepadHand GetHand() const { return mControllerState.hand; }
+  uint32_t GetNumButtons() const { return mControllerState.numButtons; }
+  uint32_t GetNumAxes() const { return mControllerState.numAxes; }
+  uint32_t GetNumHaptics() const { return mControllerState.numHaptics; }
+
+  uint32_t mControllerID;
+  dom::GamepadMappingType mMappingType;
+  uint32_t mDisplayID;
+  VRControllerState mControllerState;
+  bool operator==(const VRControllerInfo& other) const {
+    // Note that mControllerState is asserted to be a POD type, so memcmp is
+    // safe
+    return mControllerID == other.mControllerID &&
+           memcmp(&mControllerState, &other.mControllerState,
+                  sizeof(VRControllerState)) == 0 &&
+           mMappingType == other.mMappingType && mDisplayID == other.mDisplayID;
+  }
+
+  bool operator!=(const VRControllerInfo& other) const {
+    return !(*this == other);
+  }
+};
+
+struct VRTelemetry {
+  VRTelemetry() : mLastDroppedFrameCount(-1) {}
+
+  void Clear() {
+    mPresentationStart = TimeStamp();
+    mLastDroppedFrameCount = -1;
+  }
+
+  bool IsLastDroppedFrameValid() { return (mLastDroppedFrameCount != -1); }
+
+  TimeStamp mPresentationStart;
+  int32_t mLastDroppedFrameCount;
+};
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif /* GFX_VR_H */