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

信号

void sceneGraphChanged ()

静态公共成员

const QMetaObject staticMetaObject

额外继承成员

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 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

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 )

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 )

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

另请参阅 viewportRect ().

void QSGAbstractRenderer:: setViewportRect (const QSize & size )

这是重载函数。

设置 size of the viewport to render on the surface.

另请参阅 viewportRect ().

QRect QSGAbstractRenderer:: viewportRect () const

Returns the rect of the viewport to render.

另请参阅 setViewportRect ().