vtkOpenGLRenderTimer Class Reference

Asynchronously measures GPU execution time. More...

#include <vtkOpenGLRenderTimer.h>

Public Member Functions
	vtkOpenGLRenderTimer ()
	~vtkOpenGLRenderTimer ()
void	Reset ()
	Clear out any previous results and prepare for a new query. More...
void	Start ()
	Mark the start of a timed event. More...
void	Stop ()
	Mark the end of a timed event. More...
bool	Started ()
	Returns true if the timer has been started. More...
bool	Stopped ()
	Returns true if the timer has been stopped. More...
bool	Ready ()
	Returns true when the timing results are available. More...
float	GetElapsedSeconds ()
	If Ready() returns true, get the elapsed time in the requested units. More...
float	GetElapsedMilliseconds ()
	If Ready() returns true, get the elapsed time in the requested units. More...
vtkTypeUInt64	GetElapsedNanoseconds ()
	If Ready() returns true, get the elapsed time in the requested units. More...

Protected Attributes
bool	StartReady
bool	EndReady
vtkTypeUInt32	StartQuery
vtkTypeUInt32	EndQuery
vtkTypeUInt64	StartTime
vtkTypeUInt64	EndTime

Detailed Description

Asynchronously measures GPU execution time.

This class posts events to the OpenGL server to measure execution times of GPU processes. The queries are asynchronous and multiple vtkOpenGLRenderTimers may overlap / be nested.

This uses GL_TIMESTAMP rather than GL_ELAPSED_TIME, since only one GL_ELAPSED_TIME query may be active at a time. Since GL_TIMESTAMP is not available on OpenGL ES2

Definition at line 36 of file vtkOpenGLRenderTimer.h.

Constructor & Destructor Documentation

vtkOpenGLRenderTimer::vtkOpenGLRenderTimer

(

)

vtkOpenGLRenderTimer::~vtkOpenGLRenderTimer

(

)

Member Function Documentation

void vtkOpenGLRenderTimer::Reset

(

)

Clear out any previous results and prepare for a new query.

void vtkOpenGLRenderTimer::Start

(

)

Mark the start of a timed event.

void vtkOpenGLRenderTimer::Stop

(

)

Mark the end of a timed event.

bool vtkOpenGLRenderTimer::Started

(

)

Returns true if the timer has been started.

The query may not be ready yet.

bool vtkOpenGLRenderTimer::Stopped

(

)

Returns true if the timer has been stopped.

The query may not be ready yet.

bool vtkOpenGLRenderTimer::Ready

(

)

Returns true when the timing results are available.

float vtkOpenGLRenderTimer::GetElapsedSeconds

(

)

If Ready() returns true, get the elapsed time in the requested units.

float vtkOpenGLRenderTimer::GetElapsedMilliseconds

(

)

If Ready() returns true, get the elapsed time in the requested units.

vtkTypeUInt64 vtkOpenGLRenderTimer::GetElapsedNanoseconds

(

)

If Ready() returns true, get the elapsed time in the requested units.

Member Data Documentation

bool vtkOpenGLRenderTimer::StartReady

protected

Definition at line 82 of file vtkOpenGLRenderTimer.h.

bool vtkOpenGLRenderTimer::EndReady

protected

Definition at line 83 of file vtkOpenGLRenderTimer.h.

vtkTypeUInt32 vtkOpenGLRenderTimer::StartQuery

protected

Definition at line 85 of file vtkOpenGLRenderTimer.h.

vtkTypeUInt32 vtkOpenGLRenderTimer::EndQuery

protected

Definition at line 86 of file vtkOpenGLRenderTimer.h.

vtkTypeUInt64 vtkOpenGLRenderTimer::StartTime

protected

Definition at line 88 of file vtkOpenGLRenderTimer.h.

vtkTypeUInt64 vtkOpenGLRenderTimer::EndTime

protected

Definition at line 89 of file vtkOpenGLRenderTimer.h.

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The documentation for this class was generated from the following file:

• /home/demarle/Builds/VTK/release/Utilities/Doxygen/dox/Rendering/OpenGL2/vtkOpenGLRenderTimer.h