QSGSimpleTextureNode Class

The QSGSimpleTextureNode class is provided for convenience to easily draw textured content using the QML scene graph. 更多...

头：	#include <QSGSimpleTextureNode>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Quick) target_link_libraries(mytarget PRIVATE Qt6::Quick)
qmake:	QT += quick
继承：	QSGGeometryNode

所有成员列表，包括继承成员

公共类型

enum	TextureCoordinatesTransformFlag { NoTransform, MirrorHorizontally, MirrorVertically }
flags	TextureCoordinatesTransformMode

公共函数

	QSGSimpleTextureNode ()
virtual	~QSGSimpleTextureNode () override
QSGTexture::Filtering	filtering () const
bool	ownsTexture () const
QRectF	rect () const
void	setFiltering (QSGTexture::Filtering filtering )
void	setOwnsTexture (bool owns )
void	setRect (const QRectF & r )
void	setRect (qreal x , qreal y , qreal w , qreal h )
void	setSourceRect (const QRectF & r )
void	setSourceRect (qreal x , qreal y , qreal w , qreal h )
void	setTexture (QSGTexture * texture )
void	setTextureCoordinatesTransform (QSGSimpleTextureNode::TextureCoordinatesTransformMode mode )
QRectF	sourceRect () const
QSGTexture *	texture () const
QSGSimpleTextureNode::TextureCoordinatesTransformMode	textureCoordinatesTransform () const

详细描述

警告： The simple texture node class must have a texture before being added to the scene graph to be rendered.

警告： This utility class is only functional when running with the default or software backends of the Qt Quick scenegraph. As an alternative, prefer using QSGImageNode 凭借 QQuickWindow::createImageNode (). However, this standalone class is still useful when used via subclassing and the application knows that no special scenegraph backends will be involved.

成员类型文档编制

enum QSGSimpleTextureNode:: TextureCoordinatesTransformFlag
flags QSGSimpleTextureNode:: TextureCoordinatesTransformMode

The TextureCoordinatesTransformFlag enum is used to specify the mode used to generate texture coordinates for a textured quad.

常量	值	描述
`QSGSimpleTextureNode::NoTransform`	`0x00`	Texture coordinates are oriented with window coordinates i.e. with origin at top-left.
`QSGSimpleTextureNode::MirrorHorizontally`	`0x01`	Texture coordinates are inverted in the horizontal axis with respect to window coordinates
`QSGSimpleTextureNode::MirrorVertically`	`0x02`	Texture coordinates are inverted in the vertical axis with respect to window coordinates

The TextureCoordinatesTransformMode type is a typedef for QFlags <TextureCoordinatesTransformFlag>. It stores an OR combination of TextureCoordinatesTransformFlag values.

成员函数文档编制

QSGSimpleTextureNode:: QSGSimpleTextureNode ()

Constructs a new simple texture node

`[override virtual]` QSGSimpleTextureNode:: ~QSGSimpleTextureNode ()

Destroys the texture node

QSGTexture::Filtering QSGSimpleTextureNode:: filtering () const

Returns the filtering currently set on this texture node

另请参阅 setFiltering ().

bool QSGSimpleTextureNode:: ownsTexture () const

返回 true if the node takes ownership of the texture; otherwise returns false .

另请参阅 setOwnsTexture ().

QRectF QSGSimpleTextureNode:: rect () const

Returns the target rect of this texture node.

另请参阅 setRect ().

void QSGSimpleTextureNode:: setFiltering ( QSGTexture::Filtering filtering )

Sets the filtering to be used for this texture node to filtering .

For smooth scaling, use QSGTexture::Linear ; for normal scaling, use QSGTexture::Nearest .

另请参阅 filtering ().

void QSGSimpleTextureNode:: setOwnsTexture ( bool owns )

Sets whether the node takes ownership of the texture to owns .

By default, the node does not take ownership of the texture.

另请参阅 ownsTexture () 和 setTexture ().

void QSGSimpleTextureNode:: setRect (const QRectF & r )

Sets the target rect of this texture node to r .

另请参阅 rect ().

void QSGSimpleTextureNode:: setRect ( qreal x , qreal y , qreal w , qreal h )

这是重载函数。

Sets the rectangle of this texture node to begin at ( x , y ) and have width w 和高度 h .

void QSGSimpleTextureNode:: setSourceRect (const QRectF & r )

Sets the source rect of this texture node to r .

另请参阅 sourceRect ().

void QSGSimpleTextureNode:: setSourceRect ( qreal x , qreal y , qreal w , qreal h )

这是重载函数。

Sets the rectangle of this texture node to show its texture from ( x , y ) and have width w 和高度 h relatively to the QSGTexture::textureSize .

void QSGSimpleTextureNode:: setTexture ( QSGTexture * texture )

Sets the texture of this texture node to texture .

使用 setOwnsTexture () to set whether the node should take ownership of the texture. By default, the node does not take ownership.

警告： A texture node must have a texture before being added to the scenegraph to be rendered.

另请参阅 texture ().

void QSGSimpleTextureNode:: setTextureCoordinatesTransform ( QSGSimpleTextureNode::TextureCoordinatesTransformMode mode )

Sets the method used to generate texture coordinates to mode . This can be used to obtain correct orientation of the texture. This is commonly needed when using a third party OpenGL library to render to texture as OpenGL has an inverted y-axis relative to Qt Quick.

另请参阅 textureCoordinatesTransform ().

QRectF QSGSimpleTextureNode:: sourceRect () const

Returns the source rect of this texture node.

另请参阅 setSourceRect ().

QSGTexture *QSGSimpleTextureNode:: texture () const

Returns the texture for this texture node

另请参阅 setTexture ().

QSGSimpleTextureNode::TextureCoordinatesTransformMode QSGSimpleTextureNode:: textureCoordinatesTransform () const

Returns the mode used to generate texture coordinates for this node.

另请参阅 setTextureCoordinatesTransform ().