内容

公共类型
公共函数
信号
静态公共成员
详细描述

QSGAbstractRenderer Class

QSGAbstractRenderer gives access to the scene graph nodes and rendering of a QSGEngine . 更多...

头：	#include <QSGAbstractRenderer>
qmake:	QT += quick
Since:	Qt 5.4
继承：	QObject

公共类型

flags	ClearMode
enum	ClearModeBit { ClearColorBuffer, ClearDepthBuffer, ClearStencilBuffer }

公共函数

QColor	clearColor () const
QSGAbstractRenderer::ClearMode	clearMode () const
QRect	deviceRect () const
QMatrix4x4	projectionMatrix () const
virtual void	renderScene (uint fboId = ...) = 0
QSGRootNode *	rootNode () const
void	setClearColor (const QColor & color )
void	setClearMode (QSGAbstractRenderer::ClearMode mode )
void	setDeviceRect (const QRect & rect )
void	setDeviceRect (const QSize & size )
void	setProjectionMatrix (const QMatrix4x4 & matrix )
void	setProjectionMatrixToRect (const QRectF & rect )
void	setRootNode (QSGRootNode * node )
void	setViewportRect (const QRect & rect )
void	setViewportRect (const QSize & size )
QRect	viewportRect () const

31 公共函数继承自 QObject

信号

void	sceneGraphChanged ()

2 信号继承自 QObject

静态公共成员

const QMetaObject

staticMetaObject

9 静态公共成员继承自 QObject

额外继承成员

1 特性继承自 QObject
1 公共槽继承自 QObject
9 保护函数继承自 QObject

详细描述

QSGAbstractRenderer gives access to the scene graph nodes and rendering of a QSGEngine .

A QSGAbstractRenderer created by a QSGEngine allows you to set your QSGNode tree through setRootNode () and control the rendering viewport through setDeviceRect (), setViewportRect () 和 setProjectionMatrixToRect (). You can finally trigger the rendering to the desired framebuffer through renderScene ().

The QSGAbstractRenderer is only available when used with a QSGEngine and isn't exposed when used internally by QQuickWindow .

另请参阅 QSGEngine and QSGNode .

成员类型文档编制

enum QSGAbstractRenderer:: ClearModeBit
flags QSGAbstractRenderer:: ClearMode

Used with setClearMode () to indicate which buffer should be cleared before the scene render.

常量	值	描述
`QSGAbstractRenderer::ClearColorBuffer`	`0x0001`	Clear the color buffer using clearColor ().
`QSGAbstractRenderer::ClearDepthBuffer`	`0x0002`	Clear the depth buffer.
`QSGAbstractRenderer::ClearStencilBuffer`	`0x0004`	Clear the stencil buffer.

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

另请参阅 setClearMode () 和 setClearColor ().

成员函数文档编制

QColor QSGAbstractRenderer:: clearColor () const

Returns the color that clears the framebuffer at the beginning of the rendering.

另请参阅 setClearColor () 和 clearMode ().

QSGAbstractRenderer::ClearMode QSGAbstractRenderer:: clearMode () const

Flags defining which attachment of the framebuffer will be cleared before each scene render.

另请参阅 setClearMode () 和 clearColor ().

QRect QSGAbstractRenderer:: deviceRect () const

Returns the device rect of the surface being rendered to.

另请参阅 setDeviceRect ().

QMatrix4x4 QSGAbstractRenderer:: projectionMatrix () const

Returns the projection matrix

另请参阅 setProjectionMatrix () 和 setProjectionMatrixToRect ().

`[pure virtual]` void QSGAbstractRenderer:: renderScene ( uint fboId = ...)

Render the scene to the specified fboId

若 fboId isn't specified, the scene graph will be rendered to the default framebuffer. You will have to call QOpenGLContext::swapBuffers () yourself afterward.

The framebuffer specified by fboId will be bound automatically.

另请参阅 QOpenGLContext::swapBuffers () 和 QOpenGLFramebufferObject::handle ().

QSGRootNode *QSGAbstractRenderer:: rootNode () const

Returns the root of the QSGNode scene.

另请参阅 setRootNode ().

`[signal]` void QSGAbstractRenderer:: sceneGraphChanged ()

This signal is emitted on the first modification of a node in the tree after the last scene render.

void QSGAbstractRenderer:: setClearColor (const QColor & color )

使用 color to clear the framebuffer when clearMode () 被设为 QSGAbstractRenderer::ClearColorBuffer .

另请参阅 clearColor () 和 setClearMode ().

void QSGAbstractRenderer:: setClearMode ( QSGAbstractRenderer::ClearMode mode )

Defines which attachment of the framebuffer should be cleared before each scene render with the mode 标志。

另请参阅 clearMode () 和 setClearColor ().

void QSGAbstractRenderer:: setDeviceRect (const QRect & rect )

集 rect as the geometry of the surface being rendered to.

另请参阅 deviceRect ().

void QSGAbstractRenderer:: setDeviceRect (const QSize & size )

这是重载函数。

设置 size of the surface being rendered to.

另请参阅 deviceRect ().

void QSGAbstractRenderer:: setProjectionMatrix (const QMatrix4x4 & matrix )

使用 matrix to project the QSGNode coordinates onto surface pixels.

另请参阅 projectionMatrix () 和 setProjectionMatrixToRect ().

void QSGAbstractRenderer:: setProjectionMatrixToRect (const QRectF & rect )

Convenience method that calls setProjectionMatrix () with an orthographic matrix generated from rect .

另请参阅 setProjectionMatrix () 和 projectionMatrix ().

void QSGAbstractRenderer:: setRootNode ( QSGRootNode * node )

设置 node as the root of the QSGNode scene that you want to render. You need to provide a node before trying to render the scene.

注意： This doesn't take ownership of node .

另请参阅 rootNode ().

void QSGAbstractRenderer:: setViewportRect (const QRect & rect )

集 rect as the geometry of the viewport to render on the surface.

另请参阅 viewportRect ().

void QSGAbstractRenderer:: setViewportRect (const QSize & size )