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TGLStopwatch.h
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TGLStopwatch.h
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// @(#)root/gl:$Id$
// Author: Richard Maunder 25/05/2005
/*************************************************************************
* Copyright (C) 1995-2004, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#ifndef ROOT_TGLStopwatch
#define ROOT_TGLStopwatch
#include "Rtypes.h"
//////////////////////////////////////////////////////////////////////////
// //
// TGLStopwatch //
// //
// Stopwatch object for timing GL work. We do not use the TStopwatch as //
// we need to perform GL flushing to get accurate times + we record //
// timing overheads here. //
//
// MT: Bypassed all of the overhead stuff. It does not seem reasonable
// anyway. Besides it was being initialized outside of a valid GL
// context and coused random crashes (especially on 64-bit machines with
// nvidia cards).
//
//////////////////////////////////////////////////////////////////////////
class TGLStopwatch
{
private:
// Fields
Double_t fStart; //! start time (millisec)
Double_t fEnd; //! end time (millisec)
Double_t fLastRun; //! time of last run (milisec)
// Methods
Double_t GetClock(void) const;
public:
TGLStopwatch();
virtual ~TGLStopwatch(); // ClassDef introduces virtual fns
void Start();
Double_t Lap() const;
Double_t End();
Double_t LastRun() const { return fLastRun; }
ClassDef(TGLStopwatch,0) // a GL stopwatch utility class
};
#endif // ROOT_TGLStopwatch