QMngHandler Class Reference

#include <qmnghandler_p.h>

Inheritance diagram for QMngHandler:

Collaboration diagram for QMngHandler:

Public Member Functions
	QMngHandler ()
	~QMngHandler ()
bool	canRead () const override
	\reimp
bool	read (QImage *image) override
	\reimp
bool	write (const QImage &image) override
	\reimp
int	currentImageNumber () const override
	\reimp
int	imageCount () const override
	\reimp
bool	jumpToImage (int imageNumber) override
	\reimp
bool	jumpToNextImage () override
	\reimp
int	loopCount () const override
	\reimp
int	nextImageDelay () const override
	\reimp
QVariant	option (ImageOption option) const override
	\reimp
void	setOption (ImageOption option, const QVariant &value) override
	\reimp
bool	supportsOption (ImageOption option) const override
	\reimp
Public Member Functions inherited from QImageIOHandler
	QImageIOHandler ()
	Constructs a QImageIOHandler object.
virtual	~QImageIOHandler ()
	Destructs the QImageIOHandler object.
void	setDevice (QIODevice *device)
	Sets the device of the QImageIOHandler to device.
QIODevice *	device () const
	Returns the device currently assigned to the QImageIOHandler.
void	setFormat (const QByteArray &format)
	Sets the format of the QImageIOHandler to format.
void	setFormat (const QByteArray &format) const
	Sets the format of the QImageIOHandler to format.
QByteArray	format () const
	Returns the format that is currently assigned to QImageIOHandler.
virtual bool	canRead () const =0
	Returns true if an image can be read from the device (i.e., the image format is supported, the device can be read from and the initial header information suggests that the image can be read); otherwise returns false.
virtual bool	read (QImage *image)=0
	Read an image from the device, and stores it in image.
virtual bool	write (const QImage &image)
	Writes the image image to the assigned device.
virtual QVariant	option (ImageOption option) const
	Returns the value assigned to option as a QVariant.
virtual void	setOption (ImageOption option, const QVariant &value)
	Sets the option option with the value value.
virtual bool	supportsOption (ImageOption option) const
	Returns true if the QImageIOHandler supports the option option; otherwise returns false.
virtual bool	jumpToNextImage ()
	For image formats that support animation, this function jumps to the next image.
virtual bool	jumpToImage (int imageNumber)
	For image formats that support animation, this function jumps to the image whose sequence number is imageNumber.
virtual int	loopCount () const
	For image formats that support animation, this function returns the number of times the animation should loop.
virtual int	imageCount () const
	For image formats that support animation, this function returns the number of images in the animation.
virtual int	nextImageDelay () const
	For image formats that support animation, this function returns the number of milliseconds to wait until reading the next image.
virtual int	currentImageNumber () const
	For image formats that support animation, this function returns the sequence number of the current image in the animation.
virtual QRect	currentImageRect () const
	Returns the rect of the current image.

Static Public Member Functions
static bool	canRead (QIODevice *device)
Static Public Member Functions inherited from QImageIOHandler
static bool	allocateImage (QSize size, QImage::Format format, QImage *image)

Additional Inherited Members
Public Types inherited from QImageIOHandler
enum	ImageOption {   Size , ClipRect , Description , ScaledClipRect ,   ScaledSize , CompressionRatio , Gamma , Quality ,   Name , SubType , IncrementalReading , Endianness ,   Animation , BackgroundColor , ImageFormat , SupportedSubTypes ,   OptimizedWrite , ProgressiveScanWrite , ImageTransformation }
	This enum describes the different options supported by QImageIOHandler. More...
enum	Transformation {   TransformationNone = 0 , TransformationMirror = 1 , TransformationFlip = 2 , TransformationRotate180 = TransformationMirror | TransformationFlip ,   TransformationRotate90 = 4 , TransformationMirrorAndRotate90 = TransformationMirror | TransformationRotate90 , TransformationFlipAndRotate90 = TransformationFlip | TransformationRotate90 , TransformationRotate270 = TransformationRotate180 | TransformationRotate90 }
Protected Member Functions inherited from QImageIOHandler
	QImageIOHandler (QImageIOHandlerPrivate &dd)
Protected Attributes inherited from QImageIOHandler
QScopedPointer< QImageIOHandlerPrivate >	d_ptr

Detailed Description

Definition at line 18 of file qmnghandler_p.h.

Constructor & Destructor Documentation

QMngHandler()

QMngHandler::QMngHandler

(

)

Definition at line 336 of file qmnghandler.cpp.

~QMngHandler()

QMngHandler::~QMngHandler

(

)

Definition at line 341 of file qmnghandler.cpp.

Member Function Documentation

canRead() [1/2]

bool QMngHandler::canRead ( ) const

overridevirtual

\reimp

Implements QImageIOHandler.

Definition at line 346 of file qmnghandler.cpp.

References canRead(), d, QImageIOHandler::device(), and QImageIOHandler::setFormat().

Referenced by canRead(), QMngPlugin::capabilities(), and read().

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canRead() [2/2]

bool QMngHandler::canRead ( QIODevice *  device )

static

Definition at line 360 of file qmnghandler.cpp.

References QImageIOHandler::device(), QIODevice::peek(), and qWarning.

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currentImageNumber()

int QMngHandler::currentImageNumber ( ) const

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 385 of file qmnghandler.cpp.

References d.

imageCount()

int QMngHandler::imageCount ( ) const

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 392 of file qmnghandler.cpp.

References d.

jumpToImage()

bool QMngHandler::jumpToImage ( int  imageNumber )

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 399 of file qmnghandler.cpp.

References d.

jumpToNextImage()

bool QMngHandler::jumpToNextImage ( )

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 406 of file qmnghandler.cpp.

References d.

loopCount()

int QMngHandler::loopCount ( ) const

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 413 of file qmnghandler.cpp.

References d.

nextImageDelay()

int QMngHandler::nextImageDelay ( ) const

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 422 of file qmnghandler.cpp.

References d.

option()

QVariant QMngHandler::option ( ImageOption  option ) const

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 429 of file qmnghandler.cpp.

References QImageIOHandler::Animation, QImageIOHandler::BackgroundColor, and d.

read()

bool QMngHandler::read ( QImage *  image )

overridevirtual

\reimp

Implements QImageIOHandler.

Definition at line 371 of file qmnghandler.cpp.

References canRead(), and d.

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setOption()

void QMngHandler::setOption ( ImageOption  option, const QVariant &  value  )

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 440 of file qmnghandler.cpp.

References QImageIOHandler::BackgroundColor, and d.

supportsOption()

bool QMngHandler::supportsOption ( ImageOption  option ) const

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 448 of file qmnghandler.cpp.

References QImageIOHandler::Animation, and QImageIOHandler::BackgroundColor.

write()

bool QMngHandler::write ( const QImage &  image )

overridevirtual

\reimp

Reimplemented from QImageIOHandler.

Definition at line 378 of file qmnghandler.cpp.

References d.

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

• qtimageformats/src/plugins/imageformats/mng/qmnghandler_p.h
• qtimageformats/src/plugins/imageformats/mng/qmnghandler.cpp