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 |
该类在 Qt 5.4 引入。
| flags | ClearMode |
| enum | ClearModeBit { ClearColorBuffer, ClearDepthBuffer, ClearStencilBuffer } |
| enum | MatrixTransformFlag { MatrixTransformFlipY } |
| flags | MatrixTransformFlags |
| QColor | clearColor () const |
| QSGAbstractRenderer::ClearMode | clearMode () const |
| QRect | deviceRect () const |
| QMatrix4x4 | projectionMatrix () const |
| virtual void | renderScene (uint fboId = 0) = 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 | setProjectionMatrixToRect (const QRectF & rect , QSGAbstractRenderer::MatrixTransformFlags flags ) |
| void | setRootNode (QSGRootNode * node ) |
| void | setViewportRect (const QRect & rect ) |
| void | setViewportRect (const QSize & size ) |
| QRect | viewportRect () const |
| void | sceneGraphChanged () |
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 .
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 ().
Used with setProjectionMatrixToRect () to indicate the expectations towards the generated projection matrix.
| 常量 | 值 | 描述 |
|---|---|---|
QSGAbstractRenderer::MatrixTransformFlipY
|
0x01
|
The traditional assumption in Qt Quick is that Y points up in the normalized device coordinate system. There is at least one modern graphics API where this is not the case (Vulkan). This flag can then be used to get a projection that is appropriate for such an API. |
该枚举在 Qt 5.14 引入或被修改。
The MatrixTransformFlags type is a typedef for QFlags <MatrixTransformFlag>. It stores an OR combination of MatrixTransformFlag values.
另请参阅 setProjectionMatrixToRect ().
[signal]
void
QSGAbstractRenderer::
sceneGraphChanged
()
This signal is emitted on the first modification of a node in the tree after the last scene render.
Returns the color that clears the framebuffer at the beginning of the rendering.
另请参阅 setClearColor () 和 clearMode ().
Flags defining which attachment of the framebuffer will be cleared before each scene render.
另请参阅 setClearMode () 和 clearColor ().
Returns the device rect of the surface being rendered to.
另请参阅 setDeviceRect ().
Returns the projection matrix
另请参阅 setProjectionMatrix () 和 setProjectionMatrixToRect ().
[pure virtual]
void
QSGAbstractRenderer::
renderScene
(
uint
fboId
= 0)
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 ().
Returns the root of the QSGNode scene.
另请参阅 setRootNode ().
使用 color to clear the framebuffer when clearMode () 被设为 QSGAbstractRenderer::ClearColorBuffer .
另请参阅 clearColor () 和 setClearMode ().
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 ().
设置 rect as the geometry of the surface being rendered to.
另请参阅 deviceRect ().
这是重载函数。
设置 size of the surface being rendered to.
另请参阅 deviceRect ().
使用 matrix to project the QSGNode coordinates onto surface pixels.
另请参阅 projectionMatrix () 和 setProjectionMatrixToRect ().
Convenience method that calls setProjectionMatrix () with an orthographic matrix generated from rect .
注意： This function assumes that the graphics API uses Y up in its normalized device coordinate system.
另请参阅 setProjectionMatrix () 和 projectionMatrix ().
Convenience method that calls setProjectionMatrix () with an orthographic matrix generated from rect .
Set MatrixTransformFlipY in flags when the graphics API uses Y down in its normalized device coordinate system (for example, Vulkan).
该函数在 Qt 5.14 引入。
另请参阅 setProjectionMatrix () 和 projectionMatrix ().
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 ().
设置 rect as the geometry of the viewport to render on the surface.
另请参阅 viewportRect ().
这是重载函数。
设置 size of the viewport to render on the surface.
另请参阅 viewportRect ().
Returns the rect of the viewport to render.
另请参阅 setViewportRect ().