inviwo::BufferObject Class Reference

Inheritance diagram for inviwo::BufferObject:

Public Types
enum class	BindingType { Native , ForceFloat , ForceNormalizedFloat }
enum class	SizePolicy { GrowOnly , ResizeToFit }

Public Member Functions
	BufferObject (size_t sizeInBytes, const DataFormatBase *format, BufferUsage usage, BufferTarget target=BufferTarget::Data)
	BufferObject (size_t sizeInBytes, GLFormat format, GLenum usage, GLenum target)
	BufferObject (const BufferObject &rhs)
	BufferObject (BufferObject &&rhs)
BufferObject &	operator= (const BufferObject &other)
BufferObject &	operator= (BufferObject &&other)
virtual BufferObject *	clone () const
GLenum	getFormatType () const
GLenum	getTarget () const
GLuint	getId () const
GLFormat	getGLFormat () const
const DataFormatBase *	getDataFormat () const
void	bind () const
	Calls glBindBuffer.
void	unbind () const
	Calls glBindBuffer with buffer name 0.
void	bindBase (GLuint index) const
	Calls glBindBufferBase. Binds the buffer at index of the array of targets specified by the associated target (.
void	bindRange (GLuint index, GLintptr offset, GLsizeiptr size) const
	Calls glBindBufferRange. Binds the range (offset, offset + size) of the buffer at index of the array of targets specified by the associated target (.
void	bindAndSetAttribPointer (GLuint location, BindingType bindingType=BindingType::Native) const
	bind the buffer object and set the vertex attribute pointer
void	setSizeInBytes (GLsizeiptr sizeInBytes, SizePolicy policy=SizePolicy::GrowOnly)
GLsizeiptr	getSizeInBytes () const
GLsizeiptr	getCapacityInBytes () const
void	upload (const void *data, GLsizeiptr sizeInBytes, SizePolicy policy=SizePolicy::GrowOnly)
template<typename T >
void	upload (const T &cont, SizePolicy policy=SizePolicy::GrowOnly)
void	download (void *data) const
Public Member Functions inherited from inviwo::Observable< BufferObjectObserver >
	Observable (const Observable< BufferObjectObserver > &other)
	Observable (Observable< BufferObjectObserver > &&other) noexcept
Observable< BufferObjectObserver > &	operator= (const Observable< BufferObjectObserver > &other)
Observable< BufferObjectObserver > &	operator= (Observable< BufferObjectObserver > &&other) noexcept
void	addObserver (BufferObjectObserver *observer)
void	removeObserver (BufferObjectObserver *observer)
virtual void	startBlockingNotifications () override final
virtual void	stopBlockingNotifications () override final
Public Member Functions inherited from inviwo::ObservableInterface

Static Public Member Functions
static std::string_view	targetName (GLenum target)

Additional Inherited Members
Protected Member Functions inherited from inviwo::Observable< BufferObjectObserver >
void	forEachObserver (C callback)
Protected Member Functions inherited from inviwo::ObservableInterface
void	addObservationHelper (Observer *observer)
void	removeObservationHelper (Observer *observer)

Member Enumeration Documentation

BindingType

enum class inviwo::BufferObject::BindingType

strong

Type of binding when setting glVertexAttrib*Pointer.

See glVertexAttribPointer and Vertex Specification for details.

Enumerator
Native	uses glVertexAttribIPointer for integral types, glVertexAttribDPointer for double, and glVertexAttribPointer otherwise
ForceFloat	enforces the use of glVertexAttribPointer independent of the buffer type
ForceNormalizedFloat	enforces the use of glVertexAttribPointer with normalization of integral types

SizePolicy

enum class inviwo::BufferObject::SizePolicy

strong

Policy for managing the buffer size when uploading new data to the GPU.

See also

upload

Enumerator
GrowOnly	the buffer only grows and will never be resized to a smaller size
ResizeToFit	the buffer size is adjusted to fit the data exactly

Member Function Documentation

bindAndSetAttribPointer()

void inviwo::BufferObject::bindAndSetAttribPointer	(	GLuint	location,
		BindingType	bindingType = BindingType::Native ) const

bind the buffer object and set the vertex attribute pointer

This will bind the buffer object and then set the respective glVertexAttrib*Pointer. By default, i.e. bindingType = BindingType::Native, glVertexAttribIPointer (note the 'I') is used for scalar types and glVertexAttribPointer will be used for floating point types. This behavior can be overwritten by bindingType. Then the buffer is only accessible using float in the shader.

See also

BindingType

Parameters

location	used to set the vertex attribute location
bindingType	determines which glVertexAttrib*Pointer is used

bindBase()

void inviwo::BufferObject::bindBase

(

GLuint

index

)

const

Calls glBindBufferBase. Binds the buffer at index of the array of targets specified by the associated target (.

See also

getTarget ) Targets must be one of GL_ATOMIC_COUNTER_BUFFER, GL_TRANSFORM_FEEDBACK_BUFFER, GL_UNIFORM_BUFFER or GL_SHADER_STORAGE_BUFFER

bindRange()

void inviwo::BufferObject::bindRange	(	GLuint	index,
		GLintptr	offset,
		GLsizeiptr	size ) const

Calls glBindBufferRange. Binds the range (offset, offset + size) of the buffer at index of the array of targets specified by the associated target (.

See also

getTarget ) Targets must be one of GL_ATOMIC_COUNTER_BUFFER, GL_TRANSFORM_FEEDBACK_BUFFER, GL_UNIFORM_BUFFER or GL_SHADER_STORAGE_BUFFER

getCapacityInBytes()

GLsizeiptr inviwo::BufferObject::getCapacityInBytes

(

)

const

Get the capacity of the buffer in bytes, which might be larger than the size returned by getSizeInBytes()

See also

SizePolicy

getSizeInBytes()

GLsizeiptr inviwo::BufferObject::getSizeInBytes

(

)

const

Get the size of the buffer in bytes.

setSizeInBytes()

void inviwo::BufferObject::setSizeInBytes	(	GLsizeiptr	sizeInBytes,
		SizePolicy	policy = SizePolicy::GrowOnly )

Set the size of the buffer in bytes.

Parameters

sizeInBytes	new buffer size in bytes
policy	resizing policy when sizeInBytes differs from the current size

upload() [1/2]

template<typename T >

void inviwo::BufferObject::upload ( const T & cont, SizePolicy policy = SizePolicy::GrowOnly )

inline

Upload data from a container cont into the buffer. This also binds the buffer.

Parameters

cont	data to be uploaded. The underlying data must match the current GL format of the buffer.
policy	resizing policy when sizeInBytes differs from the current size

See also

upload(const void*, GLsizeiptr, SizePolicy)

upload() [2/2]

void inviwo::BufferObject::upload	(	const void *	data,
		GLsizeiptr	sizeInBytes,
		SizePolicy	policy = SizePolicy::GrowOnly )

Upload data into the buffer. This also binds the buffer. Depending on the grow policy policy, the buffer is re-initialized with sizeInBytes if it is different from the current size of the buffer.

Parameters

data	data to be uploaded. The underlying data must match the current GL format of the buffer.
sizeInBytes	size of the uploaded data
policy	resizing policy when sizeInBytes differs from the current size

See also

getGLFormat,getSizeInBytes,SizePolicy

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

• bufferobject.h