Qt
Internal/Contributor docs for the Qt SDK. <b>Note:</b> These are NOT official API docs; those are found <a href='https://doc.qt.io/'>here</a>.
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The QSGContext holds the scene graph entry points for one QML engine. More...
#include <qsgcontext_p.h>
Public Types | |
enum | AntialiasingMethod { UndecidedAntialiasing , VertexAntialiasing , MsaaAntialiasing } |
Public Member Functions | |
QSGContext (QObject *parent=nullptr) | |
~QSGContext () override | |
virtual void | renderContextInitialized (QSGRenderContext *renderContext) |
virtual void | renderContextInvalidated (QSGRenderContext *renderContext) |
virtual QSGRenderContext * | createRenderContext ()=0 |
QSGInternalRectangleNode * | createInternalRectangleNode (const QRectF &rect, const QColor &c) |
Convenience factory function for creating a colored rectangle with the given geometry. | |
virtual QSGInternalRectangleNode * | createInternalRectangleNode ()=0 |
virtual QSGInternalImageNode * | createInternalImageNode (QSGRenderContext *renderContext)=0 |
virtual QSGInternalTextNode * | createInternalTextNode (QSGRenderContext *renderContext) |
virtual QSGPainterNode * | createPainterNode (QQuickPaintedItem *item)=0 |
virtual QSGGlyphNode * | createGlyphNode (QSGRenderContext *rc, QSGTextNode::RenderType renderType, int renderTypeQuality)=0 |
virtual QSGLayer * | createLayer (QSGRenderContext *renderContext)=0 |
virtual QSGGuiThreadShaderEffectManager * | createGuiThreadShaderEffectManager () |
Creates a new shader effect helper instance. | |
virtual QSGShaderEffectNode * | createShaderEffectNode (QSGRenderContext *renderContext) |
Creates a new shader effect node. | |
virtual QAnimationDriver * | createAnimationDriver (QObject *parent) |
Creates a new animation driver. | |
virtual float | vsyncIntervalForAnimationDriver (QAnimationDriver *driver) |
virtual bool | isVSyncDependent (QAnimationDriver *driver) |
virtual QSize | minimumFBOSize () const |
virtual QSurfaceFormat | defaultSurfaceFormat () const =0 |
virtual QSGRendererInterface * | rendererInterface (QSGRenderContext *renderContext) |
Returns a pointer to the (presumably) global renderer interface. | |
virtual QSGTextNode * | createTextNode (QSGRenderContext *renderContext) |
virtual QSGRectangleNode * | createRectangleNode ()=0 |
virtual QSGImageNode * | createImageNode ()=0 |
virtual QSGNinePatchNode * | createNinePatchNode ()=0 |
Public Member Functions inherited from QObject | |
Q_INVOKABLE | QObject (QObject *parent=nullptr) |
Constructs an object with parent object parent. | |
virtual | ~QObject () |
Destroys the object, deleting all its child objects. | |
virtual bool | event (QEvent *event) |
This virtual function receives events to an object and should return true if the event e was recognized and processed. | |
virtual bool | eventFilter (QObject *watched, QEvent *event) |
Filters events if this object has been installed as an event filter for the watched object. | |
QString | objectName () const |
Q_WEAK_OVERLOAD void | setObjectName (const QString &name) |
Sets the object's name to name. | |
void | setObjectName (QAnyStringView name) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
QBindable< QString > | bindableObjectName () |
bool | isWidgetType () const |
Returns true if the object is a widget; otherwise returns false . | |
bool | isWindowType () const |
Returns true if the object is a window; otherwise returns false . | |
bool | isQuickItemType () const |
Returns true if the object is a QQuickItem; otherwise returns false . | |
bool | signalsBlocked () const noexcept |
Returns true if signals are blocked; otherwise returns false . | |
bool | blockSignals (bool b) noexcept |
If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). | |
QThread * | thread () const |
Returns the thread in which the object lives. | |
bool | moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL) |
Changes the thread affinity for this object and its children and returns true on success. | |
int | startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer) |
This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds. | |
int | startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer) |
void | killTimer (int id) |
Kills the timer with timer identifier, id. | |
void | killTimer (Qt::TimerId id) |
template<typename T > | |
T | findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object. | |
template<typename T > | |
QList< T > | findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. | |
template<typename T > | |
T | findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
template<typename T > | |
QList< T > | findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
const QObjectList & | children () const |
Returns a list of child objects. | |
void | setParent (QObject *parent) |
Makes the object a child of parent. | |
void | installEventFilter (QObject *filterObj) |
Installs an event filter filterObj on this object. | |
void | removeEventFilter (QObject *obj) |
Removes an event filter object obj from this object. | |
QMetaObject::Connection | connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const |
bool | disconnect (const char *signal=nullptr, const QObject *receiver=nullptr, const char *member=nullptr) const |
bool | disconnect (const QObject *receiver, const char *member=nullptr) const |
void | dumpObjectTree () const |
Dumps a tree of children to the debug output. | |
void | dumpObjectInfo () const |
Dumps information about signal connections, etc. | |
bool | setProperty (const char *name, const QVariant &value) |
Sets the value of the object's name property to value. | |
bool | setProperty (const char *name, QVariant &&value) |
QVariant | property (const char *name) const |
Returns the value of the object's name property. | |
QList< QByteArray > | dynamicPropertyNames () const |
QBindingStorage * | bindingStorage () |
const QBindingStorage * | bindingStorage () const |
QObject * | parent () const |
Returns a pointer to the parent object. | |
bool | inherits (const char *classname) const |
Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false . | |
Static Public Member Functions | |
static QSGContext * | createDefaultContext () |
Creates a default scene graph context for the current hardware. | |
static QQuickTextureFactory * | createTextureFactoryFromImage (const QImage &image) |
Calls into the scene graph adaptation if available and creates a texture factory. | |
static QSGRenderLoop * | createWindowManager () |
Calls into the scene graph adaptation if available and creates a hardware specific window manager. | |
static void | setBackend (const QString &backend) |
static QString | backend () |
Static Public Member Functions inherited from QObject | |
static QMetaObject::Connection | connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection) |
\threadsafe | |
static QMetaObject::Connection | connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection) |
template<typename Func1 , typename Func2 > | |
static QMetaObject::Connection | connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection) |
template<typename Func1 , typename Func2 > | |
static QMetaObject::Connection | connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot) |
static bool | disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member) |
\threadsafe | |
static bool | disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member) |
static bool | disconnect (const QMetaObject::Connection &) |
Disconnect a connection. | |
template<typename Func1 , typename Func2 > | |
static bool | disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiver, Func2 slot) |
template<typename Func1 > | |
static bool | disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const QObject *receiver, void **zero) |
Additional Inherited Members | |
Public Slots inherited from QObject | |
void | deleteLater () |
\threadsafe | |
Signals inherited from QObject | |
void | destroyed (QObject *=nullptr) |
This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked. | |
void | objectNameChanged (const QString &objectName, QPrivateSignal) |
This signal is emitted after the object's name has been changed. | |
Protected Member Functions inherited from QObject | |
QObject * | sender () const |
Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr. | |
int | senderSignalIndex () const |
int | receivers (const char *signal) const |
Returns the number of receivers connected to the signal. | |
bool | isSignalConnected (const QMetaMethod &signal) const |
virtual void | timerEvent (QTimerEvent *event) |
This event handler can be reimplemented in a subclass to receive timer events for the object. | |
virtual void | childEvent (QChildEvent *event) |
This event handler can be reimplemented in a subclass to receive child events. | |
virtual void | customEvent (QEvent *event) |
This event handler can be reimplemented in a subclass to receive custom events. | |
virtual void | connectNotify (const QMetaMethod &signal) |
virtual void | disconnectNotify (const QMetaMethod &signal) |
QObject (QObjectPrivate &dd, QObject *parent=nullptr) | |
Protected Attributes inherited from QObject | |
QScopedPointer< QObjectData > | d_ptr |
Properties inherited from QObject | |
QString | objectName |
the name of this object | |
Related Symbols inherited from QObject | |
template< class T > T | qobject_cast (const QObject *object) |
Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr. | |
template< typename T > T | qFindChildqFindChildren (const QObject *obj, const QString &name)() |
template< typename T > QList< T > | qFindChildrenqFindChildren (const QObject *obj, const QString &name)() |
QObjectList | |
\macro Q_CLASSINFO(Name, Value) | |
The QSGContext holds the scene graph entry points for one QML engine.
The context is not ready for use until it has a QRhi. Once that happens, the scene graph population can start.
Definition at line 81 of file qsgcontext_p.h.
Enumerator | |
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UndecidedAntialiasing | |
VertexAntialiasing | |
MsaaAntialiasing |
Definition at line 86 of file qsgcontext_p.h.
Definition at line 320 of file qsgcontext.cpp.
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override |
Definition at line 325 of file qsgcontext.cpp.
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static |
Definition at line 221 of file qsgcontextplugin.cpp.
Referenced by QGeoMapMapboxGLPrivate::updateSceneGraph().
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virtual |
Creates a new animation driver.
Definition at line 383 of file qsgcontext.cpp.
References QObject::parent().
Referenced by QSGSoftwareThreadedRenderLoop::QSGSoftwareThreadedRenderLoop(), QSGThreadedRenderLoop::QSGThreadedRenderLoop(), QSGSoftwareRenderThread::run(), and QSGRenderThread::run().
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static |
Creates a default scene graph context for the current hardware.
This may load a device-specific plugin.
Definition at line 173 of file qsgcontextplugin.cpp.
References contextFactory().
Referenced by QQuickRenderControlPrivate::QQuickRenderControlPrivate(), QSGGuiThreadRenderLoop::QSGGuiThreadRenderLoop(), and QSGOpenVGRenderLoop::QSGOpenVGRenderLoop().
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pure virtual |
Implemented in QSGSoftwareContext, and QSGDefaultContext.
Referenced by QSGInternalTextNode::addGlyphs().
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virtual |
Creates a new shader effect helper instance.
This function is called on the GUI thread, unlike the others. This is necessary in order to provide adaptable, backend-specific shader effect functionality to the GUI thread too.
Reimplemented in QSGDefaultContext.
Definition at line 365 of file qsgcontext.cpp.
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
Referenced by QSGInternalTextNode::addImage(), and QQuickCanvasItem::updatePaintNode().
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
Referenced by createInternalRectangleNode().
QSGInternalRectangleNode * QSGContext::createInternalRectangleNode | ( | const QRectF & | rect, |
const QColor & | c ) |
Convenience factory function for creating a colored rectangle with the given geometry.
Definition at line 341 of file qsgcontext.cpp.
References createInternalRectangleNode(), rect, QSGInternalRectangleNode::setColor(), QSGInternalRectangleNode::setRect(), and QSGInternalRectangleNode::update().
Referenced by QSGInternalTextNode::addRectangleNode(), and QSGInternalTextNode::setCursor().
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virtual |
Reimplemented in QSGDefaultContext.
Definition at line 350 of file qsgcontext.cpp.
Referenced by QQuickTextEditPrivate::createTextNode(), and createTextNode().
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
Referenced by QQuickDesignerSupport::refFromEffectItem(), and QQuick3DTexture::updateSpatialNode().
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
Referenced by QSGOpenVGRenderLoop::QSGOpenVGRenderLoop(), QSGSoftwareRenderLoop::QSGSoftwareRenderLoop(), QSGGuiThreadRenderLoop::createRenderContext(), and QSGThreadedRenderLoop::createRenderContext().
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virtual |
Creates a new shader effect node.
The default of returning nullptr is valid as long as the backend does not claim SupportsShaderEffectNode or ignoring ShaderEffect elements is acceptable.
Reimplemented in QSGDefaultContext.
Definition at line 375 of file qsgcontext.cpp.
Referenced by QQuickShaderEffectPrivate::handleUpdatePaintNode().
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virtual |
Definition at line 355 of file qsgcontext.cpp.
References createInternalTextNode().
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static |
Calls into the scene graph adaptation if available and creates a texture factory.
The primary purpose of this function is to reimplement hardware specific asynchronous texture frameskip-less uploads that can happen on the image providers thread.
Definition at line 190 of file qsgcontextplugin.cpp.
References contextFactory().
Referenced by BackendSupport::BackendSupport(), and QQuickTextureFactory::textureFactoryForImage().
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static |
Calls into the scene graph adaptation if available and creates a hardware specific window manager.
Definition at line 204 of file qsgcontextplugin.cpp.
References contextFactory().
Referenced by QSGRenderLoop::instance().
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pure virtual |
Implemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
Referenced by QQuickWindowPrivate::init().
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virtual |
Definition at line 403 of file qsgcontext.cpp.
References isVSyncDependent().
Referenced by QSGThreadedRenderLoop::event(), and isVSyncDependent().
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virtual |
Definition at line 408 of file qsgcontext.cpp.
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virtual |
Reimplemented in QSGDefaultContext.
Definition at line 329 of file qsgcontext.cpp.
Referenced by QSGDefaultRenderContext::initialize().
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virtual |
Reimplemented in QSGDefaultContext.
Definition at line 333 of file qsgcontext.cpp.
Referenced by QSGSoftwareRenderContext::invalidate(), and QSGDefaultRenderContext::invalidate().
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virtual |
Returns a pointer to the (presumably) global renderer interface.
Reimplemented in QSGOpenVGContext, QSGSoftwareContext, and QSGDefaultContext.
Definition at line 427 of file qsgcontext.cpp.
References Q_UNUSED, and qWarning.
Referenced by isOpenGL(), QQuickWindowPrivate::openglContext(), and QQuickImageParticle::updatePaintNode().
Definition at line 212 of file qsgcontextplugin.cpp.
References qWarning.
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virtual |
Definition at line 395 of file qsgcontext.cpp.