eq::util::Accum Class Reference

A C++ class to abstract an accumulation buffer. More...

#include <accum.h>

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List of all members.

Public Member Functions
	Accum (GLEWContext *const glewContext)
	Construct a new accumulation buffer.
	~Accum ()
	Destruct the accumulation buffer.
bool	init (const PixelViewport &pvp, GLuint textureFormat)
	Inits the accumulation object.
void	exit ()
	Exits the accum object.
bool	resize (const int width, const int height)
	Resizes the accumulation object.
void	clear ()
	Clears the accumulation object.
void	accum ()
	Accumulates a frame into the accumulation object.
void	display ()
	Displays the result of the accumulation object.
uint32_t	getMaxSteps () const
	Get the number of maximum steps possible to do during the accumulation operation.
uint32_t	getNumSteps () const
	Get the current number of accumulations done.
void	setTotalSteps (uint32_t totalSteps)
	Set the total steps that will be used.
uint32_t	getTotalSteps ()
bool	usesFBO () const
	Test if the accumulation uses the FBO implementation.
GLEWContext *	glewGetContext ()
const GLEWContext *	glewGetContext () const
Static Public Member Functions
static bool	usesFBO (const GLEWContext *glewContext)
	Test if the accumulation would use the FBO implementation.

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Detailed Description

A C++ class to abstract an accumulation buffer.

Depending on the OpenGL version, an FBO or glAccum() is used.

Remark: MacOS systems seem to have a buggy implementation of glAccum(), and use a workaround which needs setTotalSteps().

Definition at line 39 of file accum.h.

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Member Function Documentation

uint32_t eq::util::Accum::getMaxSteps

(

)

const

Get the number of maximum steps possible to do during the accumulation operation.

Returns:

the maximum number of steps.

Definition at line 151 of file accum.cpp.

uint32_t eq::util::Accum::getNumSteps

(

)

const [inline]

Get the current number of accumulations done.

Returns:

the number of steps done.

Definition at line 98 of file accum.h.

bool eq::util::Accum::init	(	const PixelViewport &	pvp,
		GLuint	textureFormat
	)

Inits the accumulation object.

Parameters:

	pvp	the pixel viewport.
	textureFormat	the texture format.

Definition at line 39 of file accum.cpp.

References exit().

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bool eq::util::Accum::resize	(	const int	width,
		const int	height
	)

Resizes the accumulation object.

Parameters:

	width	the new width.
	height	the new height.

Returns:

true if the accumulation object is correctly resized.

Definition at line 77 of file accum.cpp.

void eq::util::Accum::setTotalSteps

(

uint32_t

totalSteps

)

[inline]

Set the total steps that will be used.

This is needed only for Darwin systems because of the specific glAccum() workaround.

Parameters:

totalSteps

the total number of steps to do.

Definition at line 108 of file accum.h.

Referenced by eq::Compositor::assembleFramesSorted(), and eq::Compositor::assembleFramesUnsorted().

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bool eq::util::Accum::usesFBO

(

const GLEWContext *

glewContext

)

[static]

Test if the accumulation would use the FBO implementation.

Returns:

true if the accumulation uses an FBO, false if it uses glAccum().

Definition at line 169 of file accum.cpp.

bool eq::util::Accum::usesFBO

(

)

const

Test if the accumulation uses the FBO implementation.

Returns:

true if the accumulation uses an FBO, false if it uses glAccum().

Definition at line 162 of file accum.cpp.

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

• accum.h
• accum.cpp