#include <qsvgiohandler.h>

Inheritance diagram for QSvgIOHandler:

Collaboration diagram for QSvgIOHandler:

Public Member Functions
	QSvgIOHandler ()
	~QSvgIOHandler ()
bool	canRead () const override
	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`.
bool	read (QImage *image) override
	Read an image from the device, and stores it in image.
QVariant	option (ImageOption option) const override
	Returns the value assigned to option as a QVariant.
void	setOption (ImageOption option, const QVariant &value) override
	Sets the option option with the value value.
bool	supportsOption (ImageOption option) const override
	Returns `true` if the QImageIOHandler supports the option option; otherwise returns `false`.
bool	jumpToNextImage () override
	For image formats that support animation, this function jumps to the next image.
bool	jumpToImage (int imageNumber) override
	For image formats that support animation, this function jumps to the image whose sequence number is imageNumber.
int	loopCount () const override
	For image formats that support animation, this function returns the number of times the animation should loop.
int	imageCount () const override
	For image formats that support animation, this function returns the number of images in the animation.
int	nextImageDelay () const override
	For image formats that support animation, this function returns the number of milliseconds to wait until reading the next image.
int	currentImageNumber () const override
	For image formats that support animation, this function returns the sequence number of the current image in the animation.
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	write (const QImage &image)
	Writes the image image to the assigned device.
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 21 of file qsvgiohandler.h.

Constructor & Destructor Documentation

◆ QSvgIOHandler()

QSvgIOHandler::QSvgIOHandler ( )

Definition at line 88 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::QSvgIOHandlerPrivate().

Referenced by QSvgPlugin::create().

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◆ ~QSvgIOHandler()

QSvgIOHandler::~QSvgIOHandler ( )

Definition at line 95 of file qsvgiohandler.cpp.

Member Function Documentation

◆ canRead() [1/2]

bool QSvgIOHandler::canRead ( ) const

overridevirtual

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.

When reimplementing canRead(), make sure that the I/O device (device()) is left in its original state (e.g., by using peek() rather than read()).

See also: read(), QIODevice::peek()

Implements QImageIOHandler.

Definition at line 100 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::currentFrame, QImageReader::device(), QSvgIOHandlerPrivate::frameCount, QSvgIOHandlerPrivate::loadAttempted, QSvgIOHandlerPrivate::loadStatus, and QSvgIOHandlerPrivate::readDone.

Referenced by QSvgIOHandlerPrivate::load().

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◆ canRead() [2/2]

bool QSvgIOHandler::canRead ( QIODevice * device )

static

Definition at line 295 of file qsvgiohandler.cpp.

◆ currentImageNumber()

int QSvgIOHandler::currentImageNumber ( ) const

overridevirtual

For image formats that support animation, this function returns the sequence number of the current image in the animation.

If this function is called before any image is read(), -1 is returned. The number of the first image in the sequence is 0.

If the image format does not support animation, 0 is returned.

See also: read()

Reimplemented from QImageIOHandler.

Definition at line 287 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::currentFrame, and QSvgIOHandlerPrivate::readDone.

◆ imageCount()

int QSvgIOHandler::imageCount ( ) const

overridevirtual

For image formats that support animation, this function returns the number of images in the animation.

If the image format does not support animation, or if it is unable to determine the number of images, 0 is returned.

The default implementation returns 1 if canRead() returns true; otherwise 0 is returned.

Reimplemented from QImageIOHandler.

Definition at line 277 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::frameCount.

◆ jumpToImage()

bool QSvgIOHandler::jumpToImage ( int imageNumber )

overridevirtual

For image formats that support animation, this function jumps to the image whose sequence number is imageNumber.

The next call to read() will attempt to read this image.

The default implementation does nothing, and returns false.

Reimplemented from QImageIOHandler.

Definition at line 262 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::currentFrame, QImageReader::device(), QSvgIOHandlerPrivate::frameCount, and QSvgIOHandlerPrivate::load().

Referenced by jumpToNextImage().

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◆ jumpToNextImage()

bool QSvgIOHandler::jumpToNextImage ( )

overridevirtual

For image formats that support animation, this function jumps to the next image.

The default implementation does nothing, and returns false.

Reimplemented from QImageIOHandler.

Definition at line 257 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::currentFrame, and jumpToImage().

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◆ loopCount()

int QSvgIOHandler::loopCount ( ) const

overridevirtual

For image formats that support animation, this function returns the number of times the animation should loop.

If the image format does not support animation, 0 is returned.

Reimplemented from QImageIOHandler.

Definition at line 272 of file qsvgiohandler.cpp.

◆ nextImageDelay()

int QSvgIOHandler::nextImageDelay ( ) const

overridevirtual

For image formats that support animation, this function returns the number of milliseconds to wait until reading the next image.

If the image format does not support animation, 0 is returned.

Reimplemented from QImageIOHandler.

Definition at line 282 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::frameDelay.

◆ option()

QVariant QSvgIOHandler::option ( ImageOption option ) const

overridevirtual

Returns the value assigned to option as a QVariant.

The type of the value depends on the option. For example, option(Size) returns a QSize variant.

See also: setOption(), supportsOption()

Reimplemented from QImageIOHandler.

Definition at line 184 of file qsvgiohandler.cpp.

References QImageReader::device(), and QSvgIOHandlerPrivate::load().

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◆ read()

bool QSvgIOHandler::read ( QImage * image )

overridevirtual

Read an image from the device, and stores it in image.

Returns true if the image is successfully read; otherwise returns false.

For image formats that support incremental loading, and for animation formats, the image handler can assume that image points to the previous frame.

See also: canRead()

Implements QImageIOHandler.

Definition at line 122 of file qsvgiohandler.cpp.

References QSvgIOHandlerPrivate::currentFrame, QImageReader::device(), QSvgIOHandlerPrivate::frameCount, QSvgIOHandlerPrivate::load(), QPaintEngine::QPainter, and QSvgIOHandlerPrivate::readDone.

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◆ setOption()

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

overridevirtual

Sets the option option with the value value.

See also: option(), ImageOption

Reimplemented from QImageIOHandler.

Definition at line 217 of file qsvgiohandler.cpp.

◆ supportsOption()

bool QSvgIOHandler::supportsOption ( ImageOption option ) const

overridevirtual

Returns true if the QImageIOHandler supports the option option; otherwise returns false.

For example, if the QImageIOHandler supports the \l Size option, supportsOption(Size) must return true.

See also: setOption(), option()

Reimplemented from QImageIOHandler.

Definition at line 238 of file qsvgiohandler.cpp.

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

qtsvg/src/plugins/imageformats/svg/qsvgiohandler.h (6b0aba5544c4e2c9015a691a7ad669b3d6c94cfe)
qtsvg/src/plugins/imageformats/svg/qsvgiohandler.cpp (6b0aba5544c4e2c9015a691a7ad669b3d6c94cfe)

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QSvgIOHandler()

◆ ~QSvgIOHandler()

Member Function Documentation

◆ canRead() [1/2]

◆ canRead() [2/2]

◆ currentImageNumber()

◆ imageCount()

◆ jumpToImage()

◆ jumpToNextImage()

◆ loopCount()

◆ nextImageDelay()

◆ option()

◆ read()

◆ setOption()

◆ supportsOption()