QBuffer Class

class Qt3DCore::QBuffer

Provides a data store for raw data to later be used as vertices or uniforms. More...

Header:	#include <Qt3DCore/QBuffer>
CMake:	find_package(Qt6 REQUIRED COMPONENTS 3dcore) target_link_libraries(mytarget PRIVATE Qt6::3dcore)
qmake:	QT += 3dcore
Instantiated By:	Buffer
Inherits:	Qt3DCore::QNode

List of all members, including inherited members

Public Types

enum	AccessType { Write, Read, ReadWrite }
enum	UsageType { StreamDraw, StreamRead, StreamCopy, StaticDraw, StaticRead, …, DynamicCopy }

Properties

accessType : AccessType
usage : UsageType

Public Functions

	QBuffer(Qt3DCore::QNode *parent = nullptr)
Qt3DCore::QBuffer::AccessType	accessType() const
QByteArray	data() const
void	setData(const QByteArray &bytes)
void	updateData(int offset, const QByteArray &bytes)
Qt3DCore::QBuffer::UsageType	usage() const

Public Slots

void	setAccessType(Qt3DCore::QBuffer::AccessType access)
void	setUsage(Qt3DCore::QBuffer::UsageType usage)

Signals

void	accessTypeChanged(Qt3DCore::QBuffer::AccessType access)
void	dataAvailable()
void	dataChanged(const QByteArray &bytes)
void	usageChanged(Qt3DCore::QBuffer::UsageType usage)

Detailed Description

Data can be provided directly using QBuffer::setData().

Member Type Documentation

enum QBuffer::AccessType

Constant	Value	Description
`Qt3DCore::QBuffer::Write`	`0x1`	Write access
`Qt3DCore::QBuffer::Read`	`0x2`	Read access
`Qt3DCore::QBuffer::ReadWrite`	`Write\|Read`	Write\|Read

enum QBuffer::UsageType

The type of the usage.

Constant	Value	Description
`Qt3DCore::QBuffer::StreamDraw`	`0x88E0`	GL_STREAM_DRAW
`Qt3DCore::QBuffer::StreamRead`	`0x88E1`	GL_STREAM_READ
`Qt3DCore::QBuffer::StreamCopy`	`0x88E2`	GL_STREAM_COPY
`Qt3DCore::QBuffer::StaticDraw`	`0x88E4`	GL_STATIC_DRAW
`Qt3DCore::QBuffer::StaticRead`	`0x88E5`	GL_STATIC_READ
`Qt3DCore::QBuffer::StaticCopy`	`0x88E6`	GL_STATIC_COPY
`Qt3DCore::QBuffer::DynamicDraw`	`0x88E8`	GL_DYNAMIC_DRAW
`Qt3DCore::QBuffer::DynamicRead`	`0x88E9`	GL_DYNAMIC_READ
`Qt3DCore::QBuffer::DynamicCopy`	`0x88EA`	GL_DYNAMIC_COPY

Property Documentation

accessType : AccessType

Returns the AccessType of the buffer.

Access functions:

Qt3DCore::QBuffer::AccessType	accessType() const
void	setAccessType(Qt3DCore::QBuffer::AccessType access)

Notifier signal:

void	accessTypeChanged(Qt3DCore::QBuffer::AccessType access)

See also QBuffer::AccessType.

usage : UsageType

Holds the buffer usage.

Access functions:

Qt3DCore::QBuffer::UsageType	usage() const
void	setUsage(Qt3DCore::QBuffer::UsageType usage)

Notifier signal:

void	usageChanged(Qt3DCore::QBuffer::UsageType usage)

Member Function Documentation

QBuffer::QBuffer(Qt3DCore::QNode **parent* = nullptr)

Constructs a new QBuffer with parent.

`[signal]` void QBuffer::dataAvailable()

This signal is emitted when data becomes available.

`[signal]` void QBuffer::dataChanged(const QByteArray &bytes)

This signal is emitted with bytes when data changes.

QByteArray QBuffer::data() const

Returns the data.

See also setData().

void QBuffer::setData(const QByteArray &bytes)

Sets bytes as data.

See also data().

`[invokable]` void QBuffer::updateData(int offset, const QByteArray &bytes)

Updates the data by replacing it with bytes at offset.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

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