QSGClipNode Class
The QSGClipNode class implements the clipping functionality in the scene graph. 更多...
| 头文件: | #include <QSGClipNode> |
| qmake: | QT += quick |
| 基类: | QSGBasicGeometryNode |
公有函数
| QSGClipNode() | |
| ~QSGClipNode() | |
| QRectF | clipRect() const |
| bool | isRectangular() const |
| void | setClipRect(const QRectF &rect) |
| void | setIsRectangular(bool rectHint) |
- 3 个公有函数继承自 QSGBasicGeometryNode
- 20 个公有函数继承自 QSGNode
详细描述
The QSGClipNode class implements the clipping functionality in the scene graph.
Clipping applies to the node's subtree and can be nested. Multiple clip nodes will be accumulated by intersecting all their geometries. The accumulation happens as part of the rendering.
Clip nodes must have a geometry before they can be added to the scene graph.
Clipping is usually implemented by using the stencil buffer.
Note: All classes with QSG prefix should be used solely on the scene graph's rendering thread. See Scene Graph and Rendering for more information.
成员函数
QSGClipNode::QSGClipNode()
Creates a new QSGClipNode without a geometry.
The clip node must have a geometry before it can be added to the scene graph.
QSGClipNode::~QSGClipNode()
Deletes this QSGClipNode.
If the flag QSGNode::OwnsGeometry is set, the geometry will also be deleted.
QRectF QSGClipNode::clipRect() const
Returns the clip rect of this node.
参见 setClipRect().
bool QSGClipNode::isRectangular() const
Returns if this clip node has a rectangular clip.
参见 setIsRectangular().
void QSGClipNode::setClipRect(const QRectF &rect)
Sets the clip rect of this clip node to rect.
When a rectangular clip is set in combination with setIsRectangular the renderer may in some cases use a more optimal clip method.
参见 clipRect().
void QSGClipNode::setIsRectangular(bool rectHint)
Sets whether this clip node has a rectangular clip to rectHint.
This is an optimization hint which means that the renderer can use scissoring instead of stencil, which is significantly faster.
When this hint is set and it is applicable, the clip region will be generated from clipRect() rather than geometry().
参见 isRectangular().