#include <qddshandler.h>

Inheritance diagram for QDDSHandler:

Collaboration diagram for QDDSHandler:

Public Member Functions
	QDDSHandler ()

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.

bool	write (const QImage &image) override
	Writes the image image to the assigned device.

QVariant	option (QImageIOHandler::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 (QImageIOHandler::ImageOption option) const override
	Returns `true` if the QImageIOHandler supports the option option; otherwise returns `false`.

int	imageCount () const override
	For image formats that support animation, this function returns the number of images in the animation.

bool	jumpToImage (int imageNumber) override
	For image formats that support animation, this function jumps to the image whose sequence number is imageNumber.

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

virtual int	loopCount () const
	For image formats that support animation, this function returns the number of times the animation should loop.

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 15 of file qddshandler.h.

Constructor & Destructor Documentation

◆ QDDSHandler()

QDDSHandler::QDDSHandler ( )

Definition at line 1340 of file qddshandler.cpp.

Member Function Documentation

◆ canRead() [1/2]

bool QDDSHandler::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 1349 of file qddshandler.cpp.

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

Referenced by canRead(), and QDDSPlugin::capabilities().

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◆ canRead() [2/2]

bool QDDSHandler::canRead ( QIODevice * device )

static

Definition at line 1494 of file qddshandler.cpp.

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

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◆ imageCount()

int QDDSHandler::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 1477 of file qddshandler.cpp.

References DDSHeader::mipMapCount.

Referenced by jumpToImage().

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◆ jumpToImage()

bool QDDSHandler::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 1485 of file qddshandler.cpp.

References imageCount().

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◆ option()

QVariant QDDSHandler::option ( QImageIOHandler::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 1441 of file qddshandler.cpp.

References FormatA8R8G8B8, formatName(), QVariant::fromValue(), DDSHeader::height, QImageIOHandler::Size, QImageIOHandler::SubType, QImageIOHandler::SupportedSubTypes, supportsOption(), and DDSHeader::width.

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◆ read()

bool QDDSHandler::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.