QSGAbstractRenderer gives access to the scene graph nodes and rendering of a QSGEngine. More...
Header: | #include <QSGAbstractRenderer> |
qmake: | QT += quick |
Since: | Qt 5.4 |
Inherits: | QObject |
flags | ClearMode |
enum | ClearModeBit { ClearColorBuffer, ClearDepthBuffer, ClearStencilBuffer } |
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 |
void | sceneGraphChanged() |
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() and 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.
See also QSGEngine and QSGNode.
Used with setClearMode() to indicate which buffer should be cleared before the scene render.
Constant | Value | Description |
---|---|---|
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.
See also setClearMode() and setClearColor().
Returns the color that clears the framebuffer at the beginning of the rendering.
See also setClearColor() and clearMode().
Flags defining which attachment of the framebuffer will be cleared before each scene render.
See also setClearMode() and clearColor().
Returns the device rect of the surface being rendered to.
See also setDeviceRect().
Returns the projection matrix
See also setProjectionMatrix() and setProjectionMatrixToRect().
[pure virtual]
void QSGAbstractRenderer::renderScene(uint fboId = ...)Render the scene to the specified fboId
If 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.
See also QOpenGLContext::swapBuffers() and QOpenGLFramebufferObject::handle().
Returns the root of the QSGNode scene.
See also setRootNode().
[signal]
void QSGAbstractRenderer::sceneGraphChanged()This signal is emitted on the first modification of a node in the tree after the last scene render.
Use color to clear the framebuffer when clearMode() is set to QSGAbstractRenderer::ClearColorBuffer.
See also clearColor() and setClearMode().
Defines which attachment of the framebuffer should be cleared before each scene render with the mode flag.
See also clearMode() and setClearColor().
Sets rect as the geometry of the surface being rendered to.
See also deviceRect().
This is an overloaded function.
Sets the size of the surface being rendered to.
See also deviceRect().
Use matrix to project the QSGNode coordinates onto surface pixels.
See also projectionMatrix() and setProjectionMatrixToRect().
Convenience method that calls setProjectionMatrix() with an orthographic matrix generated from rect.
See also setProjectionMatrix() and projectionMatrix().
Sets the 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.
Note: This doesn't take ownership of node.
See also rootNode().
Sets rect as the geometry of the viewport to render on the surface.
See also viewportRect().
This is an overloaded function.
Sets the size of the viewport to render on the surface.
See also viewportRect().
Returns the rect of the viewport to render.
See also setViewportRect().