vtkPixelBufferObject Class Reference

abstracts an OpenGL pixel buffer object. More...

#include <vtkPixelBufferObject.h>

Inheritance diagram for vtkPixelBufferObject:

Collaboration diagram for vtkPixelBufferObject:

Public Types
enum	{   StreamDraw = 0 , StreamRead , StreamCopy , StaticDraw ,   StaticRead , StaticCopy , DynamicDraw , DynamicRead ,   DynamicCopy , NumberOfUsages }
enum	BufferType { UNPACKED_BUFFER = 0 , PACKED_BUFFER }
typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.
vtkPixelBufferObject *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.
bool	Upload3D (int type, void *data, unsigned int dims[3], int comps, vtkIdType increments[3], int components, int *componentList)
	Update data to PBO mapped sourcing it from a 3D array.
bool	Download3D (int type, void *data, unsigned int dims[3], int numcomps, vtkIdType increments[3])
	Download data from pixel buffer to the 3D array.
void	BindToPackedBuffer ()
	Convenience methods for binding.
void	BindToUnPackedBuffer ()
void	UnBind ()
	Deactivate the buffer.
void *	MapPackedBuffer ()
	Convenience api for mapping buffers to app address space.
void *	MapPackedBuffer (int type, unsigned int numtuples, int comps)
void *	MapPackedBuffer (unsigned int numbytes)
void *	MapUnpackedBuffer ()
void *	MapUnpackedBuffer (int type, unsigned int numtuples, int comps)
void *	MapUnpackedBuffer (unsigned int numbytes)
void	UnmapUnpackedBuffer ()
	Convenience api for unmapping buffers from app address space.
void	UnmapPackedBuffer ()
void	Bind (BufferType buffer)
	Make the buffer active.
void	UnmapBuffer (BufferType mode)
	Un-map the buffer from our address space, OpenGL can then use/reclaim the buffer contents.
void	Allocate (int vtkType, unsigned int numtuples, int comps, BufferType mode)
	Allocate PACKED/UNPACKED memory to hold numTuples*numComponents of vtkType.
void	Allocate (unsigned int nbytes, BufferType mode)
	Allocate PACKED/UNPACKED memory to hold nBytes of data.
void	ReleaseMemory ()
	Release the memory allocated without destroying the PBO handle.
void	SetContext (vtkRenderWindow *context)
	Get/Set the context.
vtkRenderWindow *	GetContext ()
	Get/Set the context.
virtual int	GetUsage ()
	Usage is a performance hint.
virtual void	SetUsage (int)
	Usage is a performance hint.
bool	Upload1D (int type, void *data, unsigned int numtuples, int comps, vtkIdType increment)
	Upload data to PBO mapped.
bool	Upload2D (int type, void *data, unsigned int dims[2], int comps, vtkIdType increments[2])
	Update data to PBO mapped sourcing it from a 2D array.
virtual int	GetType ()
	Get the type with which the data is loaded into the PBO mapped.
virtual void	SetType (int)
	Get the type with which the data is loaded into the PBO mapped.
virtual int	GetComponents ()
	Get the number of components used to initialize the buffer.
virtual void	SetComponents (int)
	Get the number of components used to initialize the buffer.
virtual unsigned int	GetSize ()
	Get the size of the data loaded into the PBO mapped memory.
virtual void	SetSize (unsigned int)
	Get the size of the data loaded into the PBO mapped memory.
void	SetSize (unsigned int nTups, int nComps)
	Get the size of the data loaded into the PBO mapped memory.
virtual unsigned int	GetHandle ()
	Get the openGL buffer handle.
bool	Download1D (int type, void *data, unsigned int dim, int numcomps, vtkIdType increment)
	Download data from pixel buffer to the 1D array.
bool	Download2D (int type, void *data, unsigned int dims[2], int numcomps, vtkIdType increments[2])
	Download data from pixel buffer to the 2D array.
void *	MapBuffer (int type, unsigned int numtuples, int comps, BufferType mode)
	Map the buffer to our addresspace.
void *	MapBuffer (unsigned int numbytes, BufferType mode)
	Map the buffer to our addresspace.
void *	MapBuffer (BufferType mode)
	Map the buffer to our addresspace.
Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)
virtual void	DebugOn ()
	Turn debugging output on.
virtual void	DebugOff ()
	Turn debugging output off.
bool	GetDebug ()
	Get the value of the debug flag.
void	SetDebug (bool debugFlag)
	Set the value of the debug flag.
virtual void	Modified ()
	Update the modification time for this object.
virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.
void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.
void	RemoveObserver (unsigned long tag)
void	RemoveObservers (unsigned long event)
void	RemoveObservers (const char *event)
void	RemoveAllObservers ()
vtkTypeBool	HasObserver (unsigned long event)
vtkTypeBool	HasObserver (const char *event)
int	InvokeEvent (unsigned long event)
int	InvokeEvent (const char *event)
unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
unsigned long	AddObserver (const char *event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
void	RemoveObservers (const char *event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
vtkTypeBool	HasObserver (const char *event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.
int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
int	InvokeEvent (const char *event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.
virtual vtkTypeBool	IsA (const char *name)
	Return 1 if this class is the same type of (or a subclass of) the named class.
virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
virtual void	Delete ()
	Delete a VTK object.
virtual void	FastDelete ()
	Delete a reference to this object.
void	InitializeObjectBase ()
void	Print (ostream &os)
	Print an object to an ostream.
virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).
virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).
int	GetReferenceCount ()
	Return the current reference count of this object.
void	SetReferenceCount (int)
	Sets the reference count.
bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.
virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.
virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

Static Public Member Functions
static vtkPixelBufferObject *	New ()
static vtkTypeBool	IsTypeOf (const char *type)
static vtkPixelBufferObject *	SafeDownCast (vtkObjectBase *o)
static bool	IsSupported (vtkRenderWindow *renWin)
	Returns if the context supports the required extensions.
Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
static void	BreakOnError ()
	This method is called when vtkErrorMacro executes.
static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.
static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.
static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.
Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.
static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.
static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkPixelBufferObject ()
	~vtkPixelBufferObject () override
bool	LoadRequiredExtensions (vtkRenderWindow *renWin)
	Loads all required OpenGL extensions.
void	CreateBuffer ()
	Create the pixel buffer object.
void	DestroyBuffer ()
	Destroys the pixel buffer object.
Protected Member Functions inherited from vtkObject
	vtkObject ()
	~vtkObject () override
void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override
void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override
void	InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.
void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events.
Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()
virtual	~vtkObjectBase ()
virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)
virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)
virtual void	ReportReferences (vtkGarbageCollector *)
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Protected Attributes
int	Usage
unsigned int	BufferTarget
int	Type
int	Components
unsigned int	Size
vtkWeakPointer< vtkRenderWindow >	Context
unsigned int	Handle
Protected Attributes inherited from vtkObject
bool	Debug
vtkTimeStamp	MTime
vtkSubjectHelper *	SubjectHelper
Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount
vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()
static vtkReallocingFunction	GetCurrentReallocFunction ()
static vtkFreeingFunction	GetCurrentFreeFunction ()
static vtkFreeingFunction	GetAlternateFreeFunction ()

Detailed Description

abstracts an OpenGL pixel buffer object.

Provides low-level access to PBO mapped memory. Used to transfer raw data to/from PBO mapped memory and the application. Once data is transferred to the PBO it can then be transferred to the GPU (eg texture memory). Data may be uploaded from the application into a pixel buffer or downloaded from the pixel buffer to the application. The vtkTextureObject is used to transfer data from/to the PBO to/from texture memory on the GPU.

See also

OpenGL Pixel Buffer Object Extension Spec (ARB_pixel_buffer_object): http://www.opengl.org/registry/specs/ARB/pixel_buffer_object.txt

Warning

Since most PBO mapped don't support double format all double data is converted to float and then uploaded.

Definition at line 43 of file vtkPixelBufferObject.h.

Member Typedef Documentation

Superclass

typedef vtkObject vtkPixelBufferObject::Superclass

Definition at line 62 of file vtkPixelBufferObject.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
StreamDraw
StreamRead
StreamCopy
StaticDraw
StaticRead
StaticCopy
DynamicDraw
DynamicRead
DynamicCopy
NumberOfUsages

Definition at line 47 of file vtkPixelBufferObject.h.

BufferType

enum vtkPixelBufferObject::BufferType

Enumerator
UNPACKED_BUFFER
PACKED_BUFFER

Definition at line 285 of file vtkPixelBufferObject.h.

Constructor & Destructor Documentation

vtkPixelBufferObject()

vtkPixelBufferObject::vtkPixelBufferObject ( )

protected

~vtkPixelBufferObject()

vtkPixelBufferObject::~vtkPixelBufferObject ( )

overrideprotected

Member Function Documentation

New()

static vtkPixelBufferObject * vtkPixelBufferObject::New ( )

static

IsTypeOf()

static vtkTypeBool vtkPixelBufferObject::IsTypeOf ( const char *  type )

static

IsA()

virtual vtkTypeBool vtkPixelBufferObject::IsA ( const char *  name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObjectBase.

SafeDownCast()

static vtkPixelBufferObject * vtkPixelBufferObject::SafeDownCast ( vtkObjectBase *  o )

static

NewInstanceInternal()

virtual vtkObjectBase * vtkPixelBufferObject::NewInstanceInternal ( ) const

protectedvirtual

NewInstance()

vtkPixelBufferObject * vtkPixelBufferObject::NewInstance

(

)

const

PrintSelf()

void vtkPixelBufferObject::PrintSelf ( ostream &  os, vtkIndent  indent  )

overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkObject.

SetContext()

void vtkPixelBufferObject::SetContext

(

vtkRenderWindow *

context

)

Get/Set the context.

Context must be a vtkOpenGLRenderWindow. This does not increase the reference count of the context to avoid reference loops. SetContext() may raise an error if the OpenGL context does not support the required OpenGL extensions.

GetContext()

vtkRenderWindow * vtkPixelBufferObject::GetContext

(

)

Get/Set the context.

Context must be a vtkOpenGLRenderWindow. This does not increase the reference count of the context to avoid reference loops. SetContext() may raise an error if the OpenGL context does not support the required OpenGL extensions.

GetUsage()

virtual int vtkPixelBufferObject::GetUsage ( )

virtual

Usage is a performance hint.

Valid values are:

• StreamDraw specified once by A, used few times S
• StreamRead specified once by R, queried a few times by A
• StreamCopy specified once by R, used a few times S
• StaticDraw specified once by A, used many times S
• StaticRead specified once by R, queried many times by A
• StaticCopy specified once by R, used many times S
• DynamicDraw respecified repeatedly by A, used many times S
• DynamicRead respecified repeatedly by R, queried many times by A
• DynamicCopy respecified repeatedly by R, used many times S A: the application S: as the source for GL drawing and image specification commands. R: reading data from the GL Initial value is StaticDraw, as in OpenGL spec.

SetUsage()

virtual void vtkPixelBufferObject::SetUsage ( int  )

virtual

Usage is a performance hint.

Valid values are:

• StreamDraw specified once by A, used few times S
• StreamRead specified once by R, queried a few times by A
• StreamCopy specified once by R, used a few times S
• StaticDraw specified once by A, used many times S
• StaticRead specified once by R, queried many times by A
• StaticCopy specified once by R, used many times S
• DynamicDraw respecified repeatedly by A, used many times S
• DynamicRead respecified repeatedly by R, queried many times by A
• DynamicCopy respecified repeatedly by R, used many times S A: the application S: as the source for GL drawing and image specification commands. R: reading data from the GL Initial value is StaticDraw, as in OpenGL spec.

Upload1D()

bool vtkPixelBufferObject::Upload1D ( int  type, void *  data, unsigned int  numtuples, int  comps, vtkIdType  increment  )

inline

Upload data to PBO mapped.

The input data can be freed after this call. The data ptr is treated as an 1D array with the given number of tuples and given number of components in each tuple to be copied to the PBO mapped. increment is the offset added after the last component in each tuple is transferred. Look at the documentation for ContinuousIncrements in vtkImageData for details about how increments are specified.

Definition at line 109 of file vtkPixelBufferObject.h.

Upload2D()

bool vtkPixelBufferObject::Upload2D ( int  type, void *  data, unsigned int  dims[2], int  comps, vtkIdType  increments[2]  )

inline

Update data to PBO mapped sourcing it from a 2D array.

The input data can be freed after this call. The data ptr is treated as a 2D array with increments indicating how to iterate over the data. Look at the documentation for ContinuousIncrements in vtkImageData for details about how increments are specified.

Definition at line 132 of file vtkPixelBufferObject.h.

Upload3D()

bool vtkPixelBufferObject::Upload3D	(	int	type,
		void *	data,
		unsigned int	dims[3],
		int	comps,
		vtkIdType	increments[3],
		int	components,
		int *	componentList
	)

Update data to PBO mapped sourcing it from a 3D array.

The input data can be freed after this call. The data ptr is treated as a 3D array with increments indicating how to iterate over the data. Look at the documentation for ContinuousIncrements in vtkImageData for details about how increments are specified.

GetType()

virtual int vtkPixelBufferObject::GetType ( )

virtual

Get the type with which the data is loaded into the PBO mapped.

eg. VTK_FLOAT for float32, VTK_CHAR for byte, VTK_UNSIGNED_CHAR for unsigned byte etc.

SetType()

virtual void vtkPixelBufferObject::SetType ( int  )

virtual

Get the type with which the data is loaded into the PBO mapped.

eg. VTK_FLOAT for float32, VTK_CHAR for byte, VTK_UNSIGNED_CHAR for unsigned byte etc.

GetComponents()

virtual int vtkPixelBufferObject::GetComponents ( )

virtual

Get the number of components used to initialize the buffer.

SetComponents()

virtual void vtkPixelBufferObject::SetComponents ( int  )

virtual

Get the number of components used to initialize the buffer.

GetSize()

virtual unsigned int vtkPixelBufferObject::GetSize ( )

virtual

Get the size of the data loaded into the PBO mapped memory.

Size is in the number of elements of the uploaded Type.

SetSize() [1/2]

virtual void vtkPixelBufferObject::SetSize ( unsigned int  )

virtual

Get the size of the data loaded into the PBO mapped memory.

Size is in the number of elements of the uploaded Type.

SetSize() [2/2]

void vtkPixelBufferObject::SetSize	(	unsigned int	nTups,
		int	nComps
	)

Get the size of the data loaded into the PBO mapped memory.

Size is in the number of elements of the uploaded Type.

GetHandle()

virtual unsigned int vtkPixelBufferObject::GetHandle ( )

virtual

Get the openGL buffer handle.

Download1D()

bool vtkPixelBufferObject::Download1D ( int  type, void *  data, unsigned int  dim, int  numcomps, vtkIdType  increment  )

inline

Download data from pixel buffer to the 1D array.

The length of the array must be equal to the size of the data in the memory.

Definition at line 197 of file vtkPixelBufferObject.h.

Download2D()

bool vtkPixelBufferObject::Download2D ( int  type, void *  data, unsigned int  dims[2], int  numcomps, vtkIdType  increments[2]  )

inline

Download data from pixel buffer to the 2D array.

(lengthx * lengthy) must be equal to the size of the data in the memory.

Definition at line 216 of file vtkPixelBufferObject.h.

Download3D()

bool vtkPixelBufferObject::Download3D	(	int	type,
		void *	data,
		unsigned int	dims[3],
		int	numcomps,
		vtkIdType	increments[3]
	)

Download data from pixel buffer to the 3D array.

(lengthx * lengthy * lengthz) must be equal to the size of the data in the memory.

BindToPackedBuffer()

void vtkPixelBufferObject::BindToPackedBuffer ( )

inline

Convenience methods for binding.

Definition at line 241 of file vtkPixelBufferObject.h.

BindToUnPackedBuffer()

void vtkPixelBufferObject::BindToUnPackedBuffer ( )

inline

Definition at line 243 of file vtkPixelBufferObject.h.

UnBind()

void vtkPixelBufferObject::UnBind

(

)

Deactivate the buffer.

MapPackedBuffer() [1/3]

void * vtkPixelBufferObject::MapPackedBuffer ( )

inline

Convenience api for mapping buffers to app address space.

See also MapBuffer.

Definition at line 254 of file vtkPixelBufferObject.h.

MapPackedBuffer() [2/3]

void * vtkPixelBufferObject::MapPackedBuffer ( int  type, unsigned int  numtuples, int  comps  )

inline

Definition at line 256 of file vtkPixelBufferObject.h.

MapPackedBuffer() [3/3]

void * vtkPixelBufferObject::MapPackedBuffer ( unsigned int  numbytes )

inline

Definition at line 261 of file vtkPixelBufferObject.h.

MapUnpackedBuffer() [1/3]

void * vtkPixelBufferObject::MapUnpackedBuffer ( )

inline

Definition at line 263 of file vtkPixelBufferObject.h.

MapUnpackedBuffer() [2/3]

void * vtkPixelBufferObject::MapUnpackedBuffer ( int  type, unsigned int  numtuples, int  comps  )

inline

Definition at line 265 of file vtkPixelBufferObject.h.

MapUnpackedBuffer() [3/3]

void * vtkPixelBufferObject::MapUnpackedBuffer ( unsigned int  numbytes )

inline

Definition at line 270 of file vtkPixelBufferObject.h.

UnmapUnpackedBuffer()

void vtkPixelBufferObject::UnmapUnpackedBuffer ( )

inline

Convenience api for unmapping buffers from app address space.

See also UnmapBuffer.

Definition at line 279 of file vtkPixelBufferObject.h.

UnmapPackedBuffer()

void vtkPixelBufferObject::UnmapPackedBuffer ( )

inline

Definition at line 281 of file vtkPixelBufferObject.h.

Bind()

void vtkPixelBufferObject::Bind

(

BufferType

buffer

)

Make the buffer active.

MapBuffer() [1/3]

void * vtkPixelBufferObject::MapBuffer	(	int	type,
		unsigned int	numtuples,
		int	comps,
		BufferType	mode
	)

Map the buffer to our addresspace.

Returns a pointer to the mapped memory for read/write access. If type, tuples and components are specified new buffer data will be allocated, else the current allocation is mapped. When finished call UnmapBuffer.

MapBuffer() [2/3]

void * vtkPixelBufferObject::MapBuffer	(	unsigned int	numbytes,
		BufferType	mode
	)

Map the buffer to our addresspace.

Returns a pointer to the mapped memory for read/write access. If type, tuples and components are specified new buffer data will be allocated, else the current allocation is mapped. When finished call UnmapBuffer.

MapBuffer() [3/3]

void * vtkPixelBufferObject::MapBuffer

(

BufferType

mode

)

Map the buffer to our addresspace.

Returns a pointer to the mapped memory for read/write access. If type, tuples and components are specified new buffer data will be allocated, else the current allocation is mapped. When finished call UnmapBuffer.

UnmapBuffer()

void vtkPixelBufferObject::UnmapBuffer

(

BufferType

mode

)

Un-map the buffer from our address space, OpenGL can then use/reclaim the buffer contents.

Allocate() [1/2]

void vtkPixelBufferObject::Allocate	(	int	vtkType,
		unsigned int	numtuples,
		int	comps,
		BufferType	mode
	)

Allocate PACKED/UNPACKED memory to hold numTuples*numComponents of vtkType.

Allocate() [2/2]

void vtkPixelBufferObject::Allocate	(	unsigned int	nbytes,
		BufferType	mode
	)

Allocate PACKED/UNPACKED memory to hold nBytes of data.

ReleaseMemory()

void vtkPixelBufferObject::ReleaseMemory

(

)

Release the memory allocated without destroying the PBO handle.

IsSupported()

static bool vtkPixelBufferObject::IsSupported ( vtkRenderWindow *  renWin )

static

Returns if the context supports the required extensions.

Extension will be loaded when the context is set.

LoadRequiredExtensions()

bool vtkPixelBufferObject::LoadRequiredExtensions ( vtkRenderWindow *  renWin )

protected

Loads all required OpenGL extensions.

Must be called every time a new context is set.

CreateBuffer()

void vtkPixelBufferObject::CreateBuffer ( )

protected

Create the pixel buffer object.

DestroyBuffer()

void vtkPixelBufferObject::DestroyBuffer ( )

protected

Destroys the pixel buffer object.

Member Data Documentation

Usage

int vtkPixelBufferObject::Usage

protected

Definition at line 355 of file vtkPixelBufferObject.h.

BufferTarget

unsigned int vtkPixelBufferObject::BufferTarget

protected

Definition at line 356 of file vtkPixelBufferObject.h.

Type

int vtkPixelBufferObject::Type

protected

Definition at line 357 of file vtkPixelBufferObject.h.

Components

int vtkPixelBufferObject::Components

protected

Definition at line 358 of file vtkPixelBufferObject.h.

Size

unsigned int vtkPixelBufferObject::Size

protected

Definition at line 359 of file vtkPixelBufferObject.h.

Context

vtkWeakPointer<vtkRenderWindow> vtkPixelBufferObject::Context

protected

Definition at line 360 of file vtkPixelBufferObject.h.

Handle

unsigned int vtkPixelBufferObject::Handle

protected

Definition at line 361 of file vtkPixelBufferObject.h.

---

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

• Rendering/OpenGL2/vtkPixelBufferObject.h