QBuffer Class
class Qt3DCore::QBufferProvides a data store for raw data to later be used as vertices or uniforms. More...
| Header: | #include <Qt3DCore/QBuffer> |
| CMake: | find_package(Qt6 COMPONENTS 3dcore REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::3dcore) |
| qmake: | QT += 3dcore |
| Instantiated By: | Buffer |
| Inherits: | Qt3DCore::QNode |
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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