1 files changed, 94 insertions, 0 deletions
diff --git a/gfx/vr/service/VRSession.h b/gfx/vr/service/VRSession.h
new file mode 100644
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+++ b/gfx/vr/service/VRSession.h
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+/* -*- 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_SERVICE_VRSESSION_H
+#define GFX_VR_SERVICE_VRSESSION_H
+
+#include "moz_external_vr.h"
+
+#if defined(XP_WIN)
+#  include <d3d11_1.h>
+#elif defined(XP_MACOSX)
+class MacIOSurface;
+#endif
+
+namespace mozilla {
+namespace gfx {
+
+class VRSession {
+ public:
+  VRSession();
+
+  // Since this class doesn't use smartpointers for its refcounted
+  // members (so that it can compile outside of mozilla-central),
+  // prevent copying the addresses without increasing the refcount.
+  VRSession(const VRSession&) = delete;
+  VRSession& operator=(const VRSession&) = delete;
+
+#ifdef XP_WIN
+  virtual ~VRSession();
+#else
+  virtual ~VRSession() = default;
+#endif
+
+  static void UpdateTrigger(VRControllerState& aState, uint32_t aButtonIndex,
+                            float aValue, float aThreshold);
+  /**
+   * In order to support WebXR's navigator.xr.IsSessionSupported call without
+   * displaying any permission dialogue, it is necessary to have a safe way to
+   * detect the capability of running a VR or AR session without activating XR
+   * runtimes or powering on hardware.
+   *
+   * API's such as OpenVR make no guarantee that hardware and software won't be
+   * left activated after enumerating devices, so each backend in gfx/vr/service
+   * must allow for more granular detection of capabilities.
+   *
+   * By passing true to bDetectRuntimesOnly, the initialization exits early
+   * after reporting the presence of XR runtime software. The Initialize method
+   * will only enumerate hardware and possibly return true when
+   * aDetectRuntimesOnly is false.
+   */
+  virtual bool Initialize(mozilla::gfx::VRSystemState& aSystemState,
+                          bool aDetectRuntimesOnly) = 0;
+  virtual void Shutdown() = 0;
+  virtual void ProcessEvents(mozilla::gfx::VRSystemState& aSystemState) = 0;
+  virtual void StartFrame(mozilla::gfx::VRSystemState& aSystemState) = 0;
+  virtual bool StartPresentation() = 0;
+  virtual void StopPresentation() = 0;
+  virtual void VibrateHaptic(uint32_t aControllerIdx, uint32_t aHapticIndex,
+                             float aIntensity, float aDuration) = 0;
+  virtual void StopVibrateHaptic(uint32_t aControllerIdx) = 0;
+  virtual void StopAllHaptics() = 0;
+  bool SubmitFrame(const mozilla::gfx::VRLayer_Stereo_Immersive& aLayer);
+  bool ShouldQuit() const;
+
+ protected:
+  bool mShouldQuit;
+#if defined(XP_WIN)
+  virtual bool SubmitFrame(const mozilla::gfx::VRLayer_Stereo_Immersive& aLayer,
+                           ID3D11Texture2D* aTexture) = 0;
+  bool CreateD3DContext(ID3D11Device* aDevice);
+
+  ID3D11Device1* GetD3DDevice();
+  ID3D11DeviceContext1* GetD3DDeviceContext();
+  ID3DDeviceContextState* GetD3DDeviceContextState();
+
+  ID3D11Device1* mDevice;
+  ID3D11DeviceContext1* mContext;
+  ID3DDeviceContextState* mDeviceContextState;
+
+#elif defined(XP_MACOSX)
+  virtual bool SubmitFrame(const mozilla::gfx::VRLayer_Stereo_Immersive& aLayer,
+                           const VRLayerTextureHandle& aTexture) = 0;
+#endif
+  void SetControllerSelectionAndSqueezeFrameId(
+      VRControllerState& controllerState, uint64_t aFrameId);
+};
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif  // GFX_VR_SERVICE_VRSESSION_H