QQuickContext2DTexture Class Reference

#include <qquickcontext2dtexture_p.h>

Inheritance diagram for QQuickContext2DTexture:

Collaboration diagram for QQuickContext2DTexture:

Classes
class	CanvasChangeEvent
class	PaintEvent

Public Slots
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

Signals
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.

Public Member Functions
	QQuickContext2DTexture ()
	~QQuickContext2DTexture ()
virtual QQuickCanvasItem::RenderTarget	renderTarget () const =0
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
virtual QSGTexture *	textureForNextFrame (QSGTexture *lastFrame, QQuickWindow *window)=0
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	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.
void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children.
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::milliseconds time, Qt::TimerType timerType=Qt::CoarseTimer)
void	killTimer (int id)
	Kills the timer with timer identifier, id.
template<typename T >
T	findChild (const QString &aName=QString(), 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 (const QString &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 >
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 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
virtual QVector2D	scaleFactor () const
void	paintWithoutTiles (QQuickContext2DCommandBuffer *ccb)
virtual QPaintDevice *	beginPainting ()
virtual void	endPainting ()
virtual QQuickContext2DTile *	createTile () const =0
virtual void	compositeTile (QQuickContext2DTile *tile)=0
void	clearTiles ()
virtual QSize	adjustedTileSize (const QSize &ts)
QRect	createTiles (const QRect &window)
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
QList< QQuickContext2DTile * >	m_tiles
QQuickContext2D *	m_context
QSurface *	m_surface
QQuickContext2D::State	m_state
QQuickCanvasItem *	m_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< QObjectData >	d_ptr

Additional Inherited Members
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)

Detailed Description

Definition at line 34 of file qquickcontext2dtexture_p.h.

Constructor & Destructor Documentation

QQuickContext2DTexture()

QT_BEGIN_NAMESPACE QQuickContext2DTexture::QQuickContext2DTexture

(

)

Definition at line 17 of file qquickcontext2dtexture.cpp.

~QQuickContext2DTexture()

QQuickContext2DTexture::~QQuickContext2DTexture

(

)

Definition at line 31 of file qquickcontext2dtexture.cpp.

References clearTiles().

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Member Function Documentation

adjustedTileSize()

QSize QQuickContext2DTexture::adjustedTileSize ( const QSize &  ts )

protectedvirtual

Definition at line 299 of file qquickcontext2dtexture.cpp.

Referenced by createTiles().

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beginPainting()

virtual QPaintDevice * QQuickContext2DTexture::beginPainting ( )

inlineprotectedvirtual

Reimplemented in QQuickContext2DImageTexture.

Definition at line 103 of file qquickcontext2dtexture_p.h.

References m_painting.

Referenced by QQuickContext2DImageTexture::beginPainting(), paint(), and paintWithoutTiles().

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canvasChanged

void QQuickContext2DTexture::canvasChanged ( const QSize &  canvasSize, const QSize &  tileSize, const QRect &  canvasWindow, const QRect &  dirtyRect, bool  smooth, bool  antialiasing  )

slot

Definition at line 128 of file qquickcontext2dtexture.cpp.

References QSize::height(), QRect::isValid(), m_tiledCanvas, setAntialiasing(), setCanvasSize(), setCanvasWindow(), setDirtyRect(), QSize::setHeight(), setSmooth(), setTileSize(), QSize::setWidth(), QRect::size(), tileSize, and QSize::width().

Referenced by event(), and QQuickContext2D::prepare().

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canvasDestroyed()

bool QQuickContext2DTexture::canvasDestroyed

(

)

Definition at line 177 of file qquickcontext2dtexture.cpp.

References m_item.

Referenced by paint().

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clearTiles()

void QQuickContext2DTexture::clearTiles ( )

protected

Definition at line 293 of file qquickcontext2dtexture.cpp.

References QList< T >::clear(), m_tiles, and qDeleteAll().

Referenced by ~QQuickContext2DTexture().

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compositeTile()

virtual void QQuickContext2DTexture::compositeTile ( QQuickContext2DTile *  tile )

protectedpure virtual

Implemented in QQuickContext2DImageTexture.

Referenced by paint().

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createTile()

virtual QQuickContext2DTile * QQuickContext2DTexture::createTile ( ) const

protectedpure virtual

Implemented in QQuickContext2DImageTexture.

Referenced by createTiles().

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createTiles()

QRect QQuickContext2DTexture::createTiles ( const QRect &  window )

protected

Definition at line 243 of file qquickcontext2dtexture.cpp.

References adjustedTileSize(), QList< T >::append(), QList< T >::clear(), createTile(), QSize::height(), i, m_tiles, m_tileSize, pos, qDeleteAll(), rect, QQuickContext2DTile::setRect(), QList< T >::size(), QList< T >::takeAt(), tiledRect(), v1, QSize::width(), and window().

Referenced by paint().

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endPainting()

virtual void QQuickContext2DTexture::endPainting ( )

inlineprotectedvirtual

Reimplemented in QQuickContext2DImageTexture.

Definition at line 104 of file qquickcontext2dtexture_p.h.

References m_painting.

Referenced by QQuickContext2DImageTexture::endPainting(), paint(), and paintWithoutTiles().

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event()

bool QQuickContext2DTexture::event ( QEvent *  e )

overridevirtual

This virtual function receives events to an object and should return true if the event e was recognized and processed.

The event() function can be reimplemented to customize the behavior of an object.

Make sure you call the parent event class implementation for all the events you did not handle.

Example:

class MyClass : public QWidget
{
    Q_OBJECT
 
public:
    MyClass(QWidget *parent = nullptr);
    ~MyClass();
 
    bool event(QEvent* ev) override
    {
        if (ev->type() == QEvent::PolishRequest) {
            // overwrite handling of PolishRequest if any
            doThings();
            return true;
        } else  if (ev->type() == QEvent::Show) {
            // complement handling of Show if any
            doThings2();
            QWidget::event(ev);
            return true;
        }
        // Make sure the rest of events are handled
        return QWidget::event(ev);
    }
};

See also

installEventFilter(), timerEvent(), QCoreApplication::sendEvent(), QCoreApplication::postEvent()

Reimplemented from QObject.

Definition at line 304 of file qquickcontext2dtexture.cpp.

References QQuickContext2DTexture::CanvasChangeEvent::antialiasing, QQuickContext2DTexture::PaintEvent::buffer, canvasChanged(), QQuickContext2DTexture::CanvasChangeEvent::canvasSize, QQuickContext2DTexture::CanvasChangeEvent::canvasWindow, QQuickContext2DTexture::CanvasChangeEvent::dirtyRect, e, QObject::event(), paint(), QQuickContext2DTexture::CanvasChangeEvent::smooth, QQuickContext2DTexture::CanvasChangeEvent::tileSize, and QEvent::User.

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grabImage

virtual void QQuickContext2DTexture::grabImage ( const QRectF &  region = QRectF() )

pure virtualslot

Referenced by QQuickContext2D::toImage().

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isOnCustomThread()

bool QQuickContext2DTexture::isOnCustomThread ( ) const

inline

Definition at line 83 of file qquickcontext2dtexture_p.h.

References m_onCustomThread.

markDirtyTexture

void QQuickContext2DTexture::markDirtyTexture ( )

slot

Definition at line 36 of file qquickcontext2dtexture.cpp.

References emit, QMutex::lock(), m_dirtyTexture, m_mutex, m_onCustomThread, textureChanged(), and QMutex::unlock().

Referenced by paint(), and paintWithoutTiles().

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paint

void QQuickContext2DTexture::paint ( QQuickContext2DCommandBuffer *  ccb )

slot

Definition at line 182 of file qquickcontext2dtexture.cpp.

References beginPainting(), canvasDestroyed(), compositeTile(), createTiles(), endPainting(), QRect::intersected(), QRect::isEmpty(), QMutex::lock(), m_antialiasing, m_canvasSize, m_canvasWindow, m_smooth, m_state, m_tiledCanvas, m_tiles, markDirtyTexture(), QQuickContext2D::mutex, paintWithoutTiles(), QQuickContext2DCommandBuffer::replay(), scaleFactor(), and QMutex::unlock().

Referenced by event(), and QQuickContext2D::flush().

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paintWithoutTiles()

void QQuickContext2DTexture::paintWithoutTiles ( QQuickContext2DCommandBuffer *  ccb )

protected

Definition at line 154 of file qquickcontext2dtexture.cpp.

References QPainter::Antialiasing, beginPainting(), QPainter::CompositionMode_SourceOver, device, endPainting(), QQuickContext2DCommandBuffer::isEmpty(), m_antialiasing, m_smooth, m_state, markDirtyTexture(), QQuickContext2DCommandBuffer::replay(), scaleFactor(), QPainter::SmoothPixmapTransform, and QPainter::TextAntialiasing.

Referenced by paint().

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renderTarget()

virtual QQuickCanvasItem::RenderTarget QQuickContext2DTexture::renderTarget ( ) const

pure virtual

Implemented in QQuickContext2DImageTexture.

scaleFactor()

virtual QVector2D QQuickContext2DTexture::scaleFactor ( ) const

inlineprotectedvirtual

Definition at line 100 of file qquickcontext2dtexture_p.h.

Referenced by paint(), and paintWithoutTiles().

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setAntialiasing()

void QQuickContext2DTexture::setAntialiasing

(

bool

antialiasing

)

Definition at line 69 of file qquickcontext2dtexture.cpp.

References m_antialiasing.

Referenced by canvasChanged(), and QQuickContext2D::init().

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setCanvasSize()

bool QQuickContext2DTexture::setCanvasSize

(

const QSize &

size

)

Definition at line 46 of file qquickcontext2dtexture.cpp.

References m_canvasSize.

Referenced by canvasChanged(), and QQuickContext2D::init().

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setCanvasWindow()

bool QQuickContext2DTexture::setCanvasWindow

(

const QRect &

canvasWindow

)

Definition at line 85 of file qquickcontext2dtexture.cpp.

References QString::isEmpty(), m_canvasDevicePixelRatio, m_canvasWindow, m_canvasWindowChanged, m_item, QObject::objectName, ok, qApp, qCDebug, qEnvironmentVariableIsEmpty(), qFuzzyCompare(), qgetenv(), qPrintable, QByteArray::toFloat(), and QQuickItem::window().

Referenced by canvasChanged(), and QQuickContext2D::init().

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setDirtyRect()

bool QQuickContext2DTexture::setDirtyRect

(

const QRect &

dirtyRect

)

Definition at line 112 of file qquickcontext2dtexture.cpp.

References QRect::intersected(), QRect::isValid(), m_canvasWindow, m_tiledCanvas, and m_tiles.

Referenced by canvasChanged().

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setItem

void QQuickContext2DTexture::setItem ( QQuickCanvasItem *  item )

slot

Definition at line 74 of file qquickcontext2dtexture.cpp.

References item, m_context, m_item, m_state, and QQuickContext2D::state.

Referenced by QQuickContext2D::~QQuickContext2D(), and QQuickContext2D::init().

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setOnCustomThread()

void QQuickContext2DTexture::setOnCustomThread ( bool  is )

inline

Definition at line 82 of file qquickcontext2dtexture_p.h.

References m_onCustomThread.

Referenced by QQuickContext2D::init().

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setSmooth()

void QQuickContext2DTexture::setSmooth

(

bool

smooth

)

Definition at line 64 of file qquickcontext2dtexture.cpp.

References m_smooth.

Referenced by canvasChanged(), and QQuickContext2D::init().

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setTileSize()

bool QQuickContext2DTexture::setTileSize

(

const QSize &

size

)

Definition at line 55 of file qquickcontext2dtexture.cpp.

References m_tileSize.

Referenced by canvasChanged(), and QQuickContext2D::init().

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textureChanged

void QQuickContext2DTexture::textureChanged ( )

signal

Referenced by markDirtyTexture().

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textureForNextFrame()

virtual QSGTexture * QQuickContext2DTexture::textureForNextFrame ( QSGTexture *  lastFrame, QQuickWindow *  window  )

pure virtual

Implemented in QQuickContext2DImageTexture.

tiledRect()

QRect QQuickContext2DTexture::tiledRect ( const QRectF &  window, const QSize &  tileSize  )

static

Definition at line 227 of file qquickcontext2dtexture.cpp.

References tileSize, and window().

Referenced by createTiles().

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Member Data Documentation

m_antialiasing

uint QQuickContext2DTexture::m_antialiasing

protected

Definition at line 130 of file qquickcontext2dtexture_p.h.

Referenced by paint(), paintWithoutTiles(), and setAntialiasing().

m_canvasDevicePixelRatio

qreal QQuickContext2DTexture::m_canvasDevicePixelRatio

protected

Definition at line 122 of file qquickcontext2dtexture_p.h.

Referenced by QQuickContext2DImageTexture::beginPainting(), and setCanvasWindow().

m_canvasSize

QSize QQuickContext2DTexture::m_canvasSize

protected

Definition at line 119 of file qquickcontext2dtexture_p.h.

Referenced by paint(), and setCanvasSize().

m_canvasWindow

QRect QQuickContext2DTexture::m_canvasWindow

protected

Definition at line 121 of file qquickcontext2dtexture_p.h.

Referenced by QQuickContext2DImageTexture::beginPainting(), QQuickContext2DImageTexture::compositeTile(), paint(), setCanvasWindow(), and setDirtyRect().

m_canvasWindowChanged

uint QQuickContext2DTexture::m_canvasWindowChanged

protected

Definition at line 127 of file qquickcontext2dtexture_p.h.

Referenced by QQuickContext2DImageTexture::beginPainting(), and setCanvasWindow().

m_condition

QWaitCondition QQuickContext2DTexture::m_condition

protected

Definition at line 125 of file qquickcontext2dtexture_p.h.

m_context

QQuickContext2D* QQuickContext2DTexture::m_context

protected

Definition at line 113 of file qquickcontext2dtexture_p.h.

Referenced by QQuickContext2DImageTexture::grabImage(), and setItem().

m_dirtyTexture

uint QQuickContext2DTexture::m_dirtyTexture

protected

Definition at line 128 of file qquickcontext2dtexture_p.h.

Referenced by markDirtyTexture(), and QQuickContext2DImageTexture::textureForNextFrame().

m_item

QQuickCanvasItem* QQuickContext2DTexture::m_item

protected

Definition at line 118 of file qquickcontext2dtexture_p.h.

Referenced by QQuickContext2DImageTexture::beginPainting(), canvasDestroyed(), setCanvasWindow(), and setItem().

m_mutex

QMutex QQuickContext2DTexture::m_mutex

protected

Definition at line 124 of file qquickcontext2dtexture_p.h.

Referenced by QQuickContext2DImageTexture::endPainting(), markDirtyTexture(), and QQuickContext2DImageTexture::textureForNextFrame().

m_onCustomThread

uint QQuickContext2DTexture::m_onCustomThread

protected

Definition at line 133 of file qquickcontext2dtexture_p.h.

Referenced by QQuickContext2DImageTexture::endPainting(), isOnCustomThread(), markDirtyTexture(), setOnCustomThread(), and QQuickContext2DImageTexture::textureForNextFrame().

m_painting

uint QQuickContext2DTexture::m_painting

protected

Definition at line 132 of file qquickcontext2dtexture_p.h.

Referenced by beginPainting(), and endPainting().

m_smooth

uint QQuickContext2DTexture::m_smooth

protected

Definition at line 129 of file qquickcontext2dtexture_p.h.

Referenced by paint(), paintWithoutTiles(), and setSmooth().

m_state

QQuickContext2D::State QQuickContext2DTexture::m_state

protected

Definition at line 116 of file qquickcontext2dtexture_p.h.

Referenced by paint(), paintWithoutTiles(), and setItem().

m_surface

QSurface* QQuickContext2DTexture::m_surface

protected

Definition at line 114 of file qquickcontext2dtexture_p.h.

m_tiledCanvas

uint QQuickContext2DTexture::m_tiledCanvas

protected

Definition at line 131 of file qquickcontext2dtexture_p.h.

Referenced by canvasChanged(), paint(), and setDirtyRect().

m_tiles

QList<QQuickContext2DTile*> QQuickContext2DTexture::m_tiles

protected

Definition at line 112 of file qquickcontext2dtexture_p.h.

Referenced by clearTiles(), createTiles(), paint(), and setDirtyRect().

m_tileSize

QSize QQuickContext2DTexture::m_tileSize

protected

Definition at line 120 of file qquickcontext2dtexture_p.h.

Referenced by createTiles(), and setTileSize().

---

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

• qtdeclarative/src/quick/items/context2d/qquickcontext2dtexture_p.h
• qtdeclarative/src/quick/items/context2d/qquickcontext2dtexture.cpp