Equalizer  1.10.1
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eq::util::PixelBufferObject Class Reference

A C++ class to abstract OpenGL pixel buffer objects. More...

#include <pixelBufferObject.h>

+ Collaboration diagram for eq::util::PixelBufferObject:

Public Member Functions

EQ_API PixelBufferObject (const GLEWContext *glewContext, const bool threadSafe)
 Construct a new pixel buffer object. More...
 
virtual EQ_API ~PixelBufferObject ()
 Destruct the pixel buffer object.
 
virtual EQ_API Error setup (const size_t size, const unsigned type)
 Initialize the pixel buffer object. More...
 
virtual EQ_API void destroy ()
 Unbind and de-initialize the pixel buffer object. More...
 
virtual EQ_API const void * mapRead () const
 Bind the PBO and map its data for reading. More...
 
virtual EQ_API void * mapWrite ()
 Bind the PBO and map its data for writing. More...
 
virtual EQ_API void unmap () const
 Unmap and unbind the PBO. More...
 
virtual EQ_API bool bind () const
 Bind the PBO. More...
 
virtual EQ_API void unbind () const
 Unbind the PBO. More...
 
EQ_API size_t getSize () const
 
EQ_API bool isInitialized () const
 
EQ_API bool isThreadSafe () const
 
unsigned getID () const
 

Detailed Description

A C++ class to abstract OpenGL pixel buffer objects.

If multiple PBOs of the same read/write type are used in the same glContext they should be bound/mapped and unbound/unmapped sequentially.

If thread-safe mode is used, buffer binding and mapping is locked until the corresponding unbind/unmap happened.

On correct PBO usage see: http://www.songho.ca/opengl/gl_pbo.html

Definition at line 44 of file pixelBufferObject.h.

Constructor & Destructor Documentation

EQ_API eq::util::PixelBufferObject::PixelBufferObject ( const GLEWContext *  glewContext,
const bool  threadSafe 
)

Construct a new pixel buffer object.

Parameters
glewContextthe OpenGL function table.
threadSafetrue if PBO shall use locks to synchronize access.
Version
1.3

Member Function Documentation

virtual EQ_API bool eq::util::PixelBufferObject::bind ( ) const
virtual

Bind the PBO.

Version
1.3
virtual EQ_API void eq::util::PixelBufferObject::destroy ( )
virtual

Unbind and de-initialize the pixel buffer object.

Version
1.3
unsigned eq::util::PixelBufferObject::getID ( ) const
Returns
OpenGL ID
Version
1.3.2
EQ_API size_t eq::util::PixelBufferObject::getSize ( ) const
Returns
the allocated size of the PBO.
Version
1.3
EQ_API bool eq::util::PixelBufferObject::isInitialized ( ) const
Returns
true if the pbo is intialized.
Version
1.3
EQ_API bool eq::util::PixelBufferObject::isThreadSafe ( ) const
Returns
true if the access to pbo is blocking.
Version
1.3
virtual EQ_API const void* eq::util::PixelBufferObject::mapRead ( ) const
virtual

Bind the PBO and map its data for reading.

Returns
pointer to the PBO memory
Version
1.3
virtual EQ_API void* eq::util::PixelBufferObject::mapWrite ( )
virtual

Bind the PBO and map its data for writing.

Returns
pointer to the PBO memory
Version
1.3
virtual EQ_API Error eq::util::PixelBufferObject::setup ( const size_t  size,
const unsigned  type 
)
virtual

Initialize the pixel buffer object.

The PBO is bound after a successful operation.

Parameters
sizetotal number of bytes (not 0)
typethe access type: GL_READ_ONLY_ARB or GL_WRITE_ONLY_ARB
Returns
ERROR_NONE on success, the Error code on failure.
Version
1.3
virtual EQ_API void eq::util::PixelBufferObject::unbind ( ) const
virtual

Unbind the PBO.

Version
1.3
virtual EQ_API void eq::util::PixelBufferObject::unmap ( ) const
virtual

Unmap and unbind the PBO.

Returns
pointer to the PBO memory
Version
1.3

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