内容

• 公共类型
• 特性
• 公共函数
• 信号
• 详细描述

QBlitFramebuffer Class

class Qt3DRender ::QBlitFramebuffer

FrameGraph node to transfer a rectangle of pixel values from one region of a render target to another. 更多...

头：	#include <QBlitFramebuffer>
qmake:	QT += 3drender
Since:	Qt 5.10
实例化：	BlitFramebuffer
继承：	Qt3DRender::QFrameGraphNode

该类在 Qt 5.10 引入。

• 所有成员列表，包括继承成员

公共类型

enum	InterpolationMethod { Nearest, Linear }

特性

destination : Qt3DRender::QRenderTarget* destinationAttachmentPoint : Qt3DRender::QRenderTargetOutput::AttachmentPoint destinationRect : QRectF

source : Qt3DRender::QRenderTarget* sourceAttachmentPoint : Qt3DRender::QRenderTargetOutput::AttachmentPoint sourceRect : QRectF

公共函数

	QBlitFramebuffer (Qt3DCore::QNode * parent = nullptr)
virtual	~QBlitFramebuffer ()
Qt3DRender::QRenderTarget *	destination () const
Qt3DRender::QRenderTargetOutput::AttachmentPoint	destinationAttachmentPoint () const
QRectF	destinationRect () const
Qt3DRender::QBlitFramebuffer::InterpolationMethod	interpolationMethod () const
void	setDestination (Qt3DRender::QRenderTarget * destination )
void	setDestinationAttachmentPoint (Qt3DRender::QRenderTargetOutput::AttachmentPoint destinationAttachmentPoint )
void	setDestinationRect (const QRectF & outputRect )
void	setInterpolationMethod (Qt3DRender::QBlitFramebuffer::InterpolationMethod interpolationMethod )
void	setSource (Qt3DRender::QRenderTarget * source )
void	setSourceAttachmentPoint (Qt3DRender::QRenderTargetOutput::AttachmentPoint sourceAttachmentPoint )
void	setSourceRect (const QRectF & inputRect )
Qt3DRender::QRenderTarget *	source () const
Qt3DRender::QRenderTargetOutput::AttachmentPoint	sourceAttachmentPoint () const
QRectF	sourceRect () const

信号

void	destinationAttachmentPointChanged ()
void	destinationChanged ()
void	destinationRectChanged ()
void	interpolationMethodChanged ()
void	sourceAttachmentPointChanged ()
void	sourceChanged ()
void	sourceRectChanged ()

详细描述

This node inserts a glBlitFrameBuffer or an equivalent into the command stream. This provides a more efficient method for copying rectangles between textures or surface backbuffers wrapped by QRenderTarget than drawing textured quads. It also supports scaling with the specified interpolation method.

注意： In practice the QBlitFramebuffer node will often be used in combination with QNoDraw since a blit should not involve issuing draw calls for any entities.

成员类型文档编制

enum QBlitFramebuffer:: InterpolationMethod

Specifies the interpolation applied if the image is stretched.

常量	值	描述
Qt3DRender::QBlitFramebuffer::Nearest	0	Nearest-neighbor interpolation.
Qt3DRender::QBlitFramebuffer::Linear	1	Linear interpolation.

特性文档编制

destination : Qt3DRender::QRenderTarget *

Specifies the destination render target. When not set, the destination is assumed to be the default framebuffer (i.e. the backbuffer of the current surface), if there is one.

注意： the source and destination must not refer to the same render target.

访问函数：

Qt3DRender::QRenderTarget *	destination () const
void	setDestination (Qt3DRender::QRenderTarget * destination )

通知程序信号：

void	destinationChanged ()

destinationAttachmentPoint : Qt3DRender::QRenderTargetOutput::AttachmentPoint

Specifies the target attachment point.

访问函数：

Qt3DRender::QRenderTargetOutput::AttachmentPoint	destinationAttachmentPoint () const
void	setDestinationAttachmentPoint (Qt3DRender::QRenderTargetOutput::AttachmentPoint destinationAttachmentPoint )

通知程序信号：

void	destinationAttachmentPointChanged ()

destinationRect : QRectF

Specifies the destination rectangle. The coordinates are assumed to follow the normal Qt coordinate system, meaning Y runs from top to bottom.

访问函数：

QRectF	destinationRect () const
void	setDestinationRect (const QRectF & outputRect )

通知程序信号：

void	destinationRectChanged ()

source : Qt3DRender::QRenderTarget *

Specifies the source render target. When not set, the source is assumed to be the default framebuffer (i.e. the backbuffer of the current surface), if there is one.

注意： the source and destination must not refer to the same render target.

访问函数：

Qt3DRender::QRenderTarget *	source () const
void	setSource (Qt3DRender::QRenderTarget * source )

通知程序信号：

void	sourceChanged ()

sourceAttachmentPoint : Qt3DRender::QRenderTargetOutput::AttachmentPoint

Specifies the source attachment point.

访问函数：

Qt3DRender::QRenderTargetOutput::AttachmentPoint	sourceAttachmentPoint () const
void	setSourceAttachmentPoint (Qt3DRender::QRenderTargetOutput::AttachmentPoint sourceAttachmentPoint )

通知程序信号：

void	sourceAttachmentPointChanged ()

sourceRect : QRectF

Specifies the source rectangle. The coordinates are assumed to follow the normal Qt coordinate system, meaning Y runs from top to bottom.

访问函数：

QRectF	sourceRect () const
void	setSourceRect (const QRectF & inputRect )

通知程序信号：

void	sourceRectChanged ()

成员函数文档编制

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

Constructs a new QBlitFramebuffer with the given parent .

[virtual] QBlitFramebuffer:: ~QBlitFramebuffer ()

析构函数。

Qt3DRender::QRenderTarget *QBlitFramebuffer:: destination () const

Returns the destination render target.

注意： Getter function for property destination.

另请参阅 setDestination ().

Qt3DRender::QRenderTargetOutput::AttachmentPoint QBlitFramebuffer:: destinationAttachmentPoint () const

Returns the destination attachment point.

注意： Getter function for property destinationAttachmentPoint.

另请参阅 setDestinationAttachmentPoint ().

QRectF QBlitFramebuffer:: destinationRect () const

Returns the destination rectangle.

注意： Getter function for property destinationRect.

另请参阅 setDestinationRect ().

Qt3DRender::QBlitFramebuffer::InterpolationMethod QBlitFramebuffer:: interpolationMethod () const

Returns the interpolation method.

注意： Getter function for property interpolationMethod.

另请参阅 setInterpolationMethod ().

void QBlitFramebuffer:: setDestination ( Qt3DRender::QRenderTarget * destination )

Sets the destination render target. The default value is nullptr, in which case the destination is assumed to be be the default framebuffer (i.e. the backbuffer of the current surface), if there is one.

注意： the source and destination must not refer to the same render target.

注意： As with other nodes, destination gets automatically parented to the QBlitFramebuffer instance when no parent has been set. The lifetime is also tracked, meaning the destination reverts to nullptr in case the currently set destination 被销毁。

注意： Setter 函数对于特性 destination .

另请参阅 destination ().

void QBlitFramebuffer:: setDestinationAttachmentPoint ( Qt3DRender::QRenderTargetOutput::AttachmentPoint destinationAttachmentPoint )

设置 destinationAttachmentPoint . Defaults to Qt3DRender::QRenderTargetOutput::AttachmentPoint::Color0.

注意： Setter 函数对于特性 destinationAttachmentPoint .

另请参阅 destinationAttachmentPoint ().

void QBlitFramebuffer:: setDestinationRect (const QRectF & outputRect )

Sets the destination rectangle to outputRect . The coordinates are assumed to follow the normal Qt coordinate system, meaning Y runs from top to bottom.

注意： Setter 函数对于特性 destinationRect .

另请参阅 destinationRect ().

void QBlitFramebuffer:: setInterpolationMethod ( Qt3DRender::QBlitFramebuffer::InterpolationMethod interpolationMethod )

设置 interpolationMethod that is applied if the image is stretched. Defaults to Linear.

注意： Setter 函数对于特性 interpolationMethod .

另请参阅 interpolationMethod ().

void QBlitFramebuffer:: setSource ( Qt3DRender::QRenderTarget * source )

Sets the source render target. The default value is nullptr, in which case the source is assumed to be be the default framebuffer (i.e. the backbuffer of the current surface), if there is one.

注意： the source and destination must not refer to the same render target.

注意： As with other nodes, source gets automatically parented to the QBlitFramebuffer instance when no parent has been set. The lifetime is also tracked, meaning the source reverts to nullptr in case the currently set source 被销毁。

注意： Setter 函数对于特性 source .

另请参阅 source ().

void QBlitFramebuffer:: setSourceAttachmentPoint ( Qt3DRender::QRenderTargetOutput::AttachmentPoint sourceAttachmentPoint )

设置 sourceAttachmentPoint . Defaults to Qt3DRender::QRenderTargetOutput::AttachmentPoint::Color0.

注意： Setter 函数对于特性 sourceAttachmentPoint .

另请参阅 sourceAttachmentPoint ().

void QBlitFramebuffer:: setSourceRect (const QRectF & inputRect )

Sets the source rectangle to inputRect . The coordinates are assumed to follow the normal Qt coordinate system, meaning Y runs from top to bottom.

注意： Setter 函数对于特性 sourceRect .

另请参阅 sourceRect ().

Qt3DRender::QRenderTarget *QBlitFramebuffer:: source () const

Returns the source render target.

注意： Getter 函数对于特性 source。

另请参阅 setSource ().

Qt3DRender::QRenderTargetOutput::AttachmentPoint QBlitFramebuffer:: sourceAttachmentPoint () const

Returns the source attachment point.

注意： Getter function for property sourceAttachmentPoint.

另请参阅 setSourceAttachmentPoint ().

QRectF QBlitFramebuffer:: sourceRect () const

Returns the source rectangle.

注意： Getter function for property sourceRect.

另请参阅 setSourceRect ().