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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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QQuickContext2DImageTexture Class Reference

#include <qquickcontext2dtexture_p.h>

+ Inheritance diagram for QQuickContext2DImageTexture:
+ Collaboration diagram for QQuickContext2DImageTexture:

Public Slots

void grabImage (const QRectF &region=QRectF()) override
 
- Public Slots inherited from QQuickContext2DTexture
void canvasChanged (const QSize &canvasSize, const QSize &tileSize, const QRect &canvasWindow, const QRect &dirtyRect, bool smooth, bool antialiasing)
 
void paint (QQuickContext2DCommandBuffer *ccb)
 
void markDirtyTexture ()
 
void setItem (QQuickCanvasItem *item)
 
virtual void grabImage (const QRectF &region=QRectF())=0
 
- Public Slots inherited from QObject
void deleteLater ()
 \threadsafe
 

Public Member Functions

 QQuickContext2DImageTexture ()
 
 ~QQuickContext2DImageTexture ()
 
QQuickCanvasItem::RenderTarget renderTarget () const override
 
QQuickContext2DTilecreateTile () const override
 
QPaintDevicebeginPainting () override
 
void endPainting () override
 
void compositeTile (QQuickContext2DTile *tile) override
 
QSGTexturetextureForNextFrame (QSGTexture *lastFrame, QQuickWindow *window) override
 
- Public Member Functions inherited from QQuickContext2DTexture
 QQuickContext2DTexture ()
 
 ~QQuickContext2DTexture ()
 
bool setCanvasSize (const QSize &size)
 
bool setTileSize (const QSize &size)
 
bool setCanvasWindow (const QRect &canvasWindow)
 
void setSmooth (bool smooth)
 
void setAntialiasing (bool antialiasing)
 
bool setDirtyRect (const QRect &dirtyRect)
 
bool canvasDestroyed ()
 
void setOnCustomThread (bool is)
 
bool isOnCustomThread () const
 
bool event (QEvent *e) override
 This virtual function receives events to an object and should return true if the event e was recognized and processed.
 
- 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 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< QStringbindableObjectName ()
 
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).
 
QThreadthread () 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 >
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 >
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 QObjectListchildren () 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< QByteArraydynamicPropertyNames () const
 
QBindingStoragebindingStorage ()
 
const QBindingStoragebindingStorage () const
 
QObjectparent () 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.
 

Additional Inherited Members

- Signals inherited from QQuickContext2DTexture
void textureChanged ()
 
- 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.
 
- Static Public Member Functions inherited from QQuickContext2DTexture
static QRect tiledRect (const QRectF &window, const QSize &tileSize)
 
- 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)
 
- Protected Member Functions inherited from QQuickContext2DTexture
virtual QVector2D scaleFactor () const
 
void paintWithoutTiles (QQuickContext2DCommandBuffer *ccb)
 
void clearTiles ()
 
virtual QSize adjustedTileSize (const QSize &ts)
 
QRect createTiles (const QRect &window)
 
- Protected Member Functions inherited from QObject
QObjectsender () 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 QQuickContext2DTexture
QList< QQuickContext2DTile * > m_tiles
 
QQuickContext2Dm_context
 
QSurfacem_surface
 
QQuickContext2D::State m_state
 
QQuickCanvasItemm_item
 
QSize m_canvasSize
 
QSize m_tileSize
 
QRect m_canvasWindow
 
qreal m_canvasDevicePixelRatio
 
QMutex m_mutex
 
QWaitCondition m_condition
 
uint m_canvasWindowChanged: 1
 
uint m_dirtyTexture: 1
 
uint m_smooth: 1
 
uint m_antialiasing: 1
 
uint m_tiledCanvas: 1
 
uint m_painting: 1
 
uint m_onCustomThread: 1
 
- Protected Attributes inherited from QObject
QScopedPointer< QObjectDatad_ptr
 
- Properties inherited from QObject
QString objectName
 the name of this object
 

Detailed Description

Definition at line 137 of file qquickcontext2dtexture_p.h.

Constructor & Destructor Documentation

◆ QQuickContext2DImageTexture()

QQuickContext2DImageTexture::QQuickContext2DImageTexture ( )

Definition at line 318 of file qquickcontext2dtexture.cpp.

◆ ~QQuickContext2DImageTexture()

QQuickContext2DImageTexture::~QQuickContext2DImageTexture ( )

Definition at line 323 of file qquickcontext2dtexture.cpp.

Member Function Documentation

◆ beginPainting()

◆ compositeTile()

void QQuickContext2DImageTexture::compositeTile ( QQuickContext2DTile * tile)
overridevirtual

Implements QQuickContext2DTexture.

Definition at line 395 of file qquickcontext2dtexture.cpp.

References QPainter::begin(), QPainter::CompositionMode_Source, QPainter::drawImage(), QPainter::end(), QRect::intersected(), QQuickContext2DTexture::m_canvasWindow, QRect::moveTo(), Q_ASSERT, QPainter::setCompositionMode(), and QRect::topLeft().

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◆ createTile()

QQuickContext2DTile * QQuickContext2DImageTexture::createTile ( ) const
overridevirtual

Implements QQuickContext2DTexture.

Definition at line 332 of file qquickcontext2dtexture.cpp.

◆ endPainting()

void QQuickContext2DImageTexture::endPainting ( )
overridevirtual

Reimplemented from QQuickContext2DTexture.

Definition at line 385 of file qquickcontext2dtexture.cpp.

References QQuickContext2DTexture::endPainting(), QMutex::lock(), QQuickContext2DTexture::m_mutex, QQuickContext2DTexture::m_onCustomThread, and QMutex::unlock().

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◆ grabImage

void QQuickContext2DImageTexture::grabImage ( const QRectF & region = QRectF())
overrideslot

Definition at line 337 of file qquickcontext2dtexture.cpp.

References QImage::copy(), QQuickContext2DTexture::m_context, QQuickContext2D::mutex, Q_ASSERT, and QQuickContext2D::setGrabbedImage().

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◆ renderTarget()

QQuickCanvasItem::RenderTarget QQuickContext2DImageTexture::renderTarget ( ) const
overridevirtual

Implements QQuickContext2DTexture.

Definition at line 327 of file qquickcontext2dtexture.cpp.

References QQuickCanvasItem::Image.

◆ textureForNextFrame()

QSGTexture * QQuickContext2DImageTexture::textureForNextFrame ( QSGTexture * lastFrame,
QQuickWindow * window )
overridevirtual

Implements QQuickContext2DTexture.

Definition at line 348 of file qquickcontext2dtexture.cpp.

References QMutex::lock(), QQuickContext2DTexture::m_dirtyTexture, QQuickContext2DTexture::m_mutex, QQuickContext2DTexture::m_onCustomThread, QMutex::unlock(), and window().

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The documentation for this class was generated from the following files: