vtkOpenGLRenderTimer.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause

 
#ifndef vtkOpenGLRenderTimer_h
#define vtkOpenGLRenderTimer_h
 
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkType.h"                   // For vtkTypeUint64, etc
 
VTK_ABI_NAMESPACE_BEGIN
class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLRenderTimer
{
public:
  vtkOpenGLRenderTimer();
  ~vtkOpenGLRenderTimer();

  static bool IsSupported();

  void Reset();

  void Start();

  void Stop();

  bool Started();

  bool Stopped();

  bool Ready();


  float GetElapsedSeconds();
  float GetElapsedMilliseconds();
  vtkTypeUInt64 GetElapsedNanoseconds();


  void ReusableStart();
  void ReusableStop();
  float GetReusableElapsedSeconds();

  vtkTypeUInt64 GetStartTime();
  vtkTypeUInt64 GetStopTime();

  void ReleaseGraphicsResources();
 
protected:
  bool StartReady;
  bool EndReady;
 
  vtkTypeUInt32 StartQuery;
  vtkTypeUInt32 EndQuery;
 
  vtkTypeUInt64 StartTime;
  vtkTypeUInt64 EndTime;
 
  bool ReusableStarted;
  bool ReusableEnded;
 
private:
  vtkOpenGLRenderTimer(const vtkOpenGLRenderTimer&) = delete;
  void operator=(const vtkOpenGLRenderTimer&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif // vtkOpenGLRenderTimer_h
 
// VTK-HeaderTest-Exclude: vtkOpenGLRenderTimer.h