QSGOpenVGTexture Class Reference

#include <qsgopenvgtexture.h>

Inheritance diagram for QSGOpenVGTexture:

Collaboration diagram for QSGOpenVGTexture:

Public Member Functions
	QSGOpenVGTexture (const QImage &image, uint flags)
	~QSGOpenVGTexture ()
qint64	comparisonKey () const override
	Returns a key suitable for comparing textures.
QSize	textureSize () const override
	Returns the size of the texture in pixels.
bool	hasAlphaChannel () const override
	Returns true if the texture data contains an alpha channel.
bool	hasMipmaps () const override
	Returns true if the texture data contains mipmap levels.
Public Member Functions inherited from QSGTexture
	QSGTexture ()
	Constructs the QSGTexture base class.
	~QSGTexture () override
	Destroys the QSGTexture.
virtual qint64	comparisonKey () const =0
	Returns a key suitable for comparing textures.
virtual QRhiTexture *	rhiTexture () const
virtual QSize	textureSize () const =0
	Returns the size of the texture in pixels.
virtual bool	hasAlphaChannel () const =0
	Returns true if the texture data contains an alpha channel.
virtual bool	hasMipmaps () const =0
	Returns true if the texture data contains mipmap levels.
virtual QRectF	normalizedTextureSubRect () const
	Returns the rectangle inside textureSize() that this texture represents in normalized coordinates.
virtual bool	isAtlasTexture () const
	Returns whether this texture is part of an atlas or not.
virtual QSGTexture *	removedFromAtlas (QRhiResourceUpdateBatch *resourceUpdates=nullptr) const
	This function returns a copy of the current texture which is removed from its atlas.
virtual void	commitTextureOperations (QRhi *rhi, QRhiResourceUpdateBatch *resourceUpdates)
	Call this function to enqueue image upload operations to resourceUpdates, in case there are any pending ones.
void	setMipmapFiltering (Filtering filter)
	Sets the mipmap sampling mode to filter.
QSGTexture::Filtering	mipmapFiltering () const
	Returns whether mipmapping should be used when sampling from this texture.
void	setFiltering (Filtering filter)
	Sets the sampling mode to filter.
QSGTexture::Filtering	filtering () const
	Returns the sampling mode to be used for this texture.
void	setAnisotropyLevel (AnisotropyLevel level)
	Sets the level of anisotropic filtering to level.
QSGTexture::AnisotropyLevel	anisotropyLevel () const
	Returns the anisotropy level in use for filtering this texture.
void	setHorizontalWrapMode (WrapMode hwrap)
	Sets the horizontal wrap mode to hwrap.
QSGTexture::WrapMode	horizontalWrapMode () const
	Returns the horizontal wrap mode to be used for this texture.
void	setVerticalWrapMode (WrapMode vwrap)
	Sets the vertical wrap mode to vwrap.
QSGTexture::WrapMode	verticalWrapMode () const
	Returns the vertical wrap mode to be used for this texture.
QRectF	convertToNormalizedSourceRect (const QRectF &rect) const
	Returns rect converted to normalized coordinates.
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.

Additional Inherited Members
Public Types inherited from QSGTexture
enum	WrapMode { Repeat , ClampToEdge , MirroredRepeat }
	Specifies how the sampler should treat texture coordinates. More...
enum	Filtering { None , Nearest , Linear }
	Specifies how sampling of texels should filter when texture coordinates are not pixel aligned. More...
enum	AnisotropyLevel {   AnisotropyNone , Anisotropy2x , Anisotropy4x , Anisotropy8x ,   Anisotropy16x }
	Specifies the anisotropic filtering level to be used when the texture is not screen aligned. More...
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.
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 QSGTexture
	QSGTexture (QSGTexturePrivate &dd)
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)

Detailed Description

Definition at line 13 of file qsgopenvgtexture.h.

Constructor & Destructor Documentation

QSGOpenVGTexture()

QT_BEGIN_NAMESPACE QSGOpenVGTexture::QSGOpenVGTexture	(	const QImage &	image,
		uint	flags
	)

Definition at line 9 of file qsgopenvgtexture.cpp.

References Q_UNUSED, and QSGOpenVGHelpers::qImageFormatToVGImageFormat().

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~QSGOpenVGTexture()

QSGOpenVGTexture::~QSGOpenVGTexture

(

)

Definition at line 20 of file qsgopenvgtexture.cpp.

Member Function Documentation

comparisonKey()

qint64 QSGOpenVGTexture::comparisonKey ( ) const

overridevirtual

Returns a key suitable for comparing textures.

Typically used in QSGMaterial::compare() implementations.

Just comparing QSGTexture pointers is not always sufficient because two QSGTexture instances that refer to the same native texture object underneath should also be considered equal. Hence the need for this function.

Implementations of this function are not expected to, and should not create any graphics resources (native texture objects) in case there are none yet.

A QSGTexture that does not have a native texture object underneath is typically not equal to any other QSGTexture, so the return value has to be crafted accordingly. There are exceptions to this, in particular when atlasing is used (where multiple textures share the same atlas texture under the hood), that is then up to the subclass implementations to deal with as appropriate.

Warning

This function can only be called from the rendering thread.

Since

5.14

Implements QSGTexture.

Definition at line 25 of file qsgopenvgtexture.cpp.

Referenced by QSGOpenVGPainterNode::render(), and QSGOpenVGSpriteNode::render().

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hasAlphaChannel()

bool QSGOpenVGTexture::hasAlphaChannel ( ) const

overridevirtual

Returns true if the texture data contains an alpha channel.

Implements QSGTexture.

Definition at line 37 of file qsgopenvgtexture.cpp.

hasMipmaps()

bool QSGOpenVGTexture::hasMipmaps ( ) const

overridevirtual

Returns true if the texture data contains mipmap levels.

Implements QSGTexture.

Definition at line 77 of file qsgopenvgtexture.cpp.

textureSize()

QSize QSGOpenVGTexture::textureSize ( ) const

overridevirtual

Returns the size of the texture in pixels.

Implements QSGTexture.

Definition at line 30 of file qsgopenvgtexture.cpp.

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

• qtdeclarative/src/plugins/scenegraph/openvg/qsgopenvgtexture.h
• qtdeclarative/src/plugins/scenegraph/openvg/qsgopenvgtexture.cpp