osg::PixelDataBufferObject Class Reference

This object represent a general class of pixel buffer objects, which are capable of allocating buffer object (memory) on the GPU. More...

Inheritance diagram for osg::PixelDataBufferObject:

[legend]

List of all members.

Public Types
enum	Mode { NONE = 0, READ = 1, WRITE = 2 }
Public Member Functions
	PixelDataBufferObject ()
	PixelDataBufferObject (const PixelDataBufferObject &pbo, const CopyOp &copyop=CopyOp::SHALLOW_COPY)
	META_Object (osg, PixelDataBufferObject)
void	setDataSize (unsigned int size)
	Set new size of the buffer object. This will reallocate the memory on the next compile.
unsigned int	getDataSize ()
	Get data size of the used buffer.
virtual void	compileBuffer (State &state) const
	Compile the buffer (reallocate the memory if buffer is dirty).
virtual void	bindBufferInReadMode (State &state)
	Bind the buffer in read mode, which means that data can be downloaded from the buffer (note: GL_PIXEL_UNPACK_BUFFER_ARB).
virtual void	bindBufferInWriteMode (State &state)
	Bind the buffer in write mode, which means following OpenGL instructions will write data into the buffer (note: GL_PIXEL_PACK_BUFFER_ARB).
virtual void	unbindBuffer (unsigned int contextID) const
	Unbind the buffer.
virtual void	resizeGLObjectBuffers (unsigned int maxSize)
	Resize any per context GLObject buffers to specified size.
Mode	getMode (unsigned int contextID) const
Protected Types
typedef osg::buffered_value < unsigned int >	ModeList
Protected Member Functions
virtual	~PixelDataBufferObject ()
Protected Attributes
BufferEntry	_bufferData
ModeList	_mode

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Detailed Description

This object represent a general class of pixel buffer objects, which are capable of allocating buffer object (memory) on the GPU.

The memory can then be used either for CPU-GPU pixel transfer or directly for GPU-GPU transfer, without CPU intervention.

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Member Typedef Documentation

typedef osg::buffered_value<unsigned int> osg::PixelDataBufferObject::ModeList [protected]

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Member Enumeration Documentation

enum osg::PixelDataBufferObject::Mode

Enumerator:

NONE	A normal mode of this data buffer.
READ	Buffer is in read mode (. See also: bindBufferInReadMode)
WRITE	Buffer is in write mode (. See also: bindBufferInWriteMode)

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Constructor & Destructor Documentation

osg::PixelDataBufferObject::PixelDataBufferObject

(

)

osg::PixelDataBufferObject::PixelDataBufferObject	(	const PixelDataBufferObject &	pbo,
		const CopyOp &	copyop = CopyOp::SHALLOW_COPY
	)

virtual osg::PixelDataBufferObject::~PixelDataBufferObject

(

)

[protected, virtual]

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Member Function Documentation

virtual void osg::PixelDataBufferObject::bindBufferInReadMode

(

State &

state

)

[virtual]

Bind the buffer in read mode, which means that data can be downloaded from the buffer (note: GL_PIXEL_UNPACK_BUFFER_ARB).

virtual void osg::PixelDataBufferObject::bindBufferInWriteMode

(

State &

state

)

[virtual]

Bind the buffer in write mode, which means following OpenGL instructions will write data into the buffer (note: GL_PIXEL_PACK_BUFFER_ARB).

virtual void osg::PixelDataBufferObject::compileBuffer

(

State &

state

)

const [virtual]

Compile the buffer (reallocate the memory if buffer is dirty).

Implements osg::BufferObject.

unsigned int osg::PixelDataBufferObject::getDataSize

(

)

[inline]

Get data size of the used buffer.

Mode osg::PixelDataBufferObject::getMode

(

unsigned int

contextID

)

const [inline]

osg::PixelDataBufferObject::META_Object	(	osg	,
		PixelDataBufferObject
	)

virtual void osg::PixelDataBufferObject::resizeGLObjectBuffers

(

unsigned int

maxSize

)

[virtual]

Resize any per context GLObject buffers to specified size.

Reimplemented from osg::BufferObject.

void osg::PixelDataBufferObject::setDataSize

(

unsigned int

size

)

[inline]

Set new size of the buffer object. This will reallocate the memory on the next compile.

virtual void osg::PixelDataBufferObject::unbindBuffer

(

unsigned int

contextID

)

const [virtual]

Unbind the buffer.

Reimplemented from osg::BufferObject.

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Member Data Documentation

BufferEntry osg::PixelDataBufferObject::_bufferData [protected]

ModeList osg::PixelDataBufferObject::_mode [mutable, protected]

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

• osg/BufferObject