1 files changed, 114 insertions, 0 deletions
diff --git a/gfx/vr/VRDisplayHost.h b/gfx/vr/VRDisplayHost.h
new file mode 100644
index 000000000..0e04e4fd2
--- /dev/null
+++ b/gfx/vr/VRDisplayHost.h
@@ -0,0 +1,114 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+* 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_DISPLAY_HOST_H
+#define GFX_VR_DISPLAY_HOST_H
+
+#include "gfxVR.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 "mozilla/dom/GamepadPoseState.h"
+
+namespace mozilla {
+namespace layers {
+class PTextureParent;
+#if defined(XP_WIN)
+class TextureSourceD3D11;
+#endif
+} // namespace layers
+namespace gfx {
+class VRLayerParent;
+
+class VRDisplayHost {
+public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VRDisplayHost)
+
+  const VRDisplayInfo& GetDisplayInfo() const { return mDisplayInfo; }
+
+  void AddLayer(VRLayerParent* aLayer);
+  void RemoveLayer(VRLayerParent* aLayer);
+
+  virtual VRHMDSensorState GetSensorState() = 0;
+  virtual VRHMDSensorState GetImmediateSensorState() = 0;
+  virtual void ZeroSensor() = 0;
+  virtual void StartPresentation() = 0;
+  virtual void StopPresentation() = 0;
+  virtual void NotifyVSync() { };
+
+  void SubmitFrame(VRLayerParent* aLayer,
+                   const int32_t& aInputFrameID,
+                   mozilla::layers::PTextureParent* aTexture,
+                   const gfx::Rect& aLeftEyeRect,
+                   const gfx::Rect& aRightEyeRect);
+
+  bool CheckClearDisplayInfoDirty();
+
+protected:
+  explicit VRDisplayHost(VRDeviceType aType);
+  virtual ~VRDisplayHost();
+
+#if defined(XP_WIN)
+  virtual void SubmitFrame(mozilla::layers::TextureSourceD3D11* aSource,
+                           const IntSize& aSize,
+                           const VRHMDSensorState& aSensorState,
+                           const gfx::Rect& aLeftEyeRect,
+                           const gfx::Rect& aRightEyeRect) = 0;
+#endif
+
+  VRDisplayInfo mDisplayInfo;
+
+  nsTArray<RefPtr<VRLayerParent>> mLayers;
+  // Weak reference to mLayers entries are cleared in VRLayerParent destructor
+
+  // 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 kMaxLatencyFrames = 100;
+  VRHMDSensorState mLastSensorState[kMaxLatencyFrames];
+  int32_t mInputFrameID;
+
+private:
+  VRDisplayInfo mLastUpdateDisplayInfo;
+};
+
+class VRControllerHost {
+public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VRControllerHost)
+
+  const VRControllerInfo& GetControllerInfo() const;
+  void SetIndex(uint32_t aIndex);
+  uint32_t GetIndex();
+  void SetButtonPressed(uint64_t aBit);
+  uint64_t GetButtonPressed();
+  void SetPose(const dom::GamepadPoseState& aPose);
+  const dom::GamepadPoseState& GetPose();
+
+protected:
+  explicit VRControllerHost(VRDeviceType aType);
+  virtual ~VRControllerHost();
+
+  VRControllerInfo mControllerInfo;
+  // The controller index in VRControllerManager.
+  uint32_t mIndex;
+  // The current button pressed bit of button mask.
+  uint64_t mButtonPressed;
+  dom::GamepadPoseState mPose;
+};
+
+} // namespace gfx
+} // namespace mozilla
+
+#endif /* GFX_VR_DISPLAY_HOST_H */