OculusSession.h - mozsearch

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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_OCULUSSESSION_H

#define GFX_VR_SERVICE_OCULUSSESSION_H

#include "VRSession.h"

#include "moz_external_vr.h"

#include "mozilla/TimeStamp.h"

#include "mozilla/gfx/2D.h"

#include "nsTArray.h"

#include "oculus/ovr_capi_dynamic.h"

#include "prlink.h"

#include "ShaderDefinitionsD3D11.h"  // for VertexShaderConstants and PixelShaderConstants

struct ID3D11Device;

namespace mozilla {

namespace layers {

struct VertexShaderConstants;

struct PixelShaderConstants;

}  // namespace layers

namespace gfx {

class OculusSession : public VRSession {

 public:

  OculusSession();

  virtual ~OculusSession();

  bool Initialize(mozilla::gfx::VRSystemState& aSystemState,

                  bool aDetectRuntimesOnly) override;

  void Shutdown() override;

  void ProcessEvents(mozilla::gfx::VRSystemState& aSystemState) override;

  void StartFrame(mozilla::gfx::VRSystemState& aSystemState) override;

  bool StartPresentation() override;

  void StopPresentation() override;

  bool SubmitFrame(const mozilla::gfx::VRLayer_Stereo_Immersive& aLayer,

                   ID3D11Texture2D* aTexture) override;

  void VibrateHaptic(uint32_t aControllerIdx, uint32_t aHapticIndex,

                     float aIntensity, float aDuration) override;

  void StopVibrateHaptic(uint32_t aControllerIdx) override;

  void StopAllHaptics() override;

 private:

  bool LoadOvrLib();

  void UnloadOvrLib();

  bool StartLib(ovrInitFlags aFlags);

  void StopLib();

  bool StartSession();

  void StopSession();

  bool StartRendering();

  void StopRendering();

  bool CreateD3DObjects();

  bool CreateShaders();

  void DestroyShaders();

  void CoverTransitions();

  void UpdateVisibility();

  bool ChangeVisibility(bool bVisible);

  bool InitState(mozilla::gfx::VRSystemState& aSystemState);

  void UpdateStageParameters(mozilla::gfx::VRDisplayState& aState);

  void UpdateEyeParameters(mozilla::gfx::VRSystemState& aState);

  void UpdateHeadsetPose(mozilla::gfx::VRSystemState& aState);

  void UpdateControllers(VRSystemState& aState);

  void UpdateControllerInputs(VRSystemState& aState,

                              const ovrInputState& aInputState);

  void UpdateHaptics();

  void EnumerateControllers(VRSystemState& aState,

                            const ovrInputState& aInputState);

  void UpdateControllerPose(VRSystemState& aState,

                            const ovrInputState& aInputState);

  void UpdateTelemetry(VRSystemState& aSystemState);

  bool IsPresentationReady() const;

  bool UpdateConstantBuffers();

  PRLibrary* mOvrLib;

  ovrSession mSession;

  ovrInitFlags mInitFlags;

  ovrTextureSwapChain mTextureSet;

  nsTArray<RefPtr<ID3D11RenderTargetView>> mRTView;

  nsTArray<RefPtr<ID3D11Texture2D>> mTexture;

  nsTArray<RefPtr<ID3D11ShaderResourceView>> mSRV;

  ID3D11VertexShader* mQuadVS;

  ID3D11PixelShader* mQuadPS;

  RefPtr<ID3D11SamplerState> mLinearSamplerState;

  layers::VertexShaderConstants mVSConstants;

  layers::PixelShaderConstants mPSConstants;

  RefPtr<ID3D11Buffer> mVSConstantBuffer;

  RefPtr<ID3D11Buffer> mPSConstantBuffer;

  RefPtr<ID3D11Buffer> mVertexBuffer;

  RefPtr<ID3D11InputLayout> mInputLayout;

  IntSize mPresentationSize;

  ovrFovPort mFOVPort[2];

  // Most recent HMD eye poses, from start of frame

  ovrPosef mFrameStartPose[2];

  float mRemainingVibrateTime[2];

  float mHapticPulseIntensity[2];

  TimeStamp mLastHapticUpdate;

  // The timestamp of the last ending presentation

  TimeStamp mLastPresentationEnd;

  bool mIsPresenting;

};

}  // namespace gfx

}  // namespace mozilla

#endif  // GFX_VR_SERVICE_OCULUSSESSION_H