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// 
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// 
// Copyright © 2008- 2013 NVIDIA Corporation. All rights reserved.
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#ifndef _NVWAVEWORKS_GFX_TIMER_IMPL_H
#define _NVWAVEWORKS_GFX_TIMER_IMPL_H

class GFSDK_WaveWorks_GFX_DisjointQuery_Pool_Impl;
class GFSDK_WaveWorks_GFX_TimerQuery_Pool_Impl;

class NVWaveWorks_GFX_Timer_Impl
{
public:

	NVWaveWorks_GFX_Timer_Impl();
	~NVWaveWorks_GFX_Timer_Impl();

	HRESULT initD3D11(ID3D11Device* pD3DDevice);
	HRESULT initGnm();
	HRESULT initGL2(void* pGLContext);

	// Timer queries wrapper
	HRESULT issueTimerQuery(Graphics_Context* pGC, int& ix);
	void releaseTimerQuery(int ix);
	HRESULT waitTimerQuery(Graphics_Context* pGC, int ix, UINT64& t);
	HRESULT getTimerQuery(Graphics_Context* pGC, int ix, UINT64& t);

	// Pair-wise get/wait
	HRESULT getTimerQueries(Graphics_Context* pGC, int ix1, int ix2, UINT64& tdiff);
	HRESULT waitTimerQueries(Graphics_Context* pGC, int ix1, int ix2, UINT64& tdiff);

	// Disjoint queries wrapper
	HRESULT beginDisjoint(Graphics_Context* pGC);
	HRESULT endDisjoint(Graphics_Context* pGC);
	int getCurrentDisjointQuery();
	void releaseDisjointQuery(int ix);
	HRESULT waitDisjointQuery(Graphics_Context* pGC, int ix, UINT64& f);
	HRESULT getDisjointQuery(Graphics_Context* pGC, int ix, UINT64& f);

	enum { InvalidQueryIndex = -1 };

private:

	HRESULT allocateAllResources();
	void releaseAllResources();
	void releaseAll();

	GFSDK_WaveWorks_GFX_DisjointQuery_Pool_Impl* m_pDisjointTimersPool;
	int m_CurrentDisjointTimerQuery;

	GFSDK_WaveWorks_GFX_TimerQuery_Pool_Impl* m_pTimersPool;

	// D3D API handling
	nv_water_d3d_api m_d3dAPI;

#if WAVEWORKS_ENABLE_D3D11
    struct D3D11Objects
    {
		ID3D11Device* m_pd3d11Device;
	};
#endif

#if WAVEWORKS_ENABLE_GNM
	struct GnmObjects
	{
	};
#endif
#if WAVEWORKS_ENABLE_GL
	struct GL2Objects
	{
		void* m_pGLContext;
	};
#endif
	union
    {
#if WAVEWORKS_ENABLE_D3D11
		D3D11Objects _11;
#endif
#if WAVEWORKS_ENABLE_GNM
		GnmObjects _gnm;
#endif
#if WAVEWORKS_ENABLE_GL
		GL2Objects _GL2;
#endif
    } m_d3d;
};

#endif	// _NVWAVEWORKS_GFX_TIMER_IMPL_H