gecko-dev/gfx/vr/gfxVROculus.h

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/* -*- 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_OCULUS_H
#define GFX_VR_OCULUS_H
#include "nsTArray.h"
#include "mozilla/RefPtr.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/EnumeratedArray.h"
#include "gfxVR.h"
//#include <OVR_CAPI.h>
//#include <OVR_CAPI_D3D.h>
#include "ovr_capi_dynamic.h"
namespace mozilla {
namespace gfx {
namespace impl {
class HMDInfoOculus : public VRHMDInfo, public VRHMDRenderingSupport {
public:
explicit HMDInfoOculus(ovrSession aSession);
bool SetFOV(const VRFieldOfView& aFOVLeft, const VRFieldOfView& aFOVRight,
double zNear, double zFar) override;
virtual VRHMDSensorState GetSensorState() override;
virtual VRHMDSensorState GetImmediateSensorState() override;
void ZeroSensor() override;
bool KeepSensorTracking() override;
void NotifyVsync(const TimeStamp& aVsyncTimestamp) override;
void FillDistortionConstants(uint32_t whichEye,
const IntSize& textureSize, const IntRect& eyeViewport,
const Size& destViewport, const Rect& destRect,
VRDistortionConstants& values) override;
VRHMDRenderingSupport* GetRenderingSupport() override { return this; }
void Destroy();
/* VRHMDRenderingSupport */
already_AddRefed<RenderTargetSet> CreateRenderTargetSet(layers::Compositor *aCompositor, const IntSize& aSize) override;
void DestroyRenderTargetSet(RenderTargetSet *aRTSet) override;
void SubmitFrame(RenderTargetSet *aRTSet, int32_t aInputFrameID) override;
ovrSession GetOculusSession() const { return mSession; }
protected:
virtual ~HMDInfoOculus() {
Destroy();
MOZ_COUNT_DTOR_INHERITED(HMDInfoOculus, VRHMDInfo);
}
// must match the size of VRDistortionVertex
struct DistortionVertex {
float pos[2];
float texR[2];
float texG[2];
float texB[2];
float genericAttribs[4];
};
ovrSession mSession;
ovrHmdDesc mDesc;
ovrFovPort mFOVPort[2];
VRHMDSensorState GetSensorState(double timeOffset);
// 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;
};
} // namespace impl
class VRHMDManagerOculus : public VRHMDManager
{
public:
static already_AddRefed<VRHMDManagerOculus> Create();
virtual bool Init() override;
virtual void Destroy() override;
virtual void GetHMDs(nsTArray<RefPtr<VRHMDInfo> >& aHMDResult) override;
protected:
VRHMDManagerOculus()
: mOculusInitialized(false)
{ }
RefPtr<impl::HMDInfoOculus> mHMDInfo;
bool mOculusInitialized;
RefPtr<nsIThread> mOculusThread;
};
} // namespace gfx
} // namespace mozilla
#endif /* GFX_VR_OCULUS_H */