Jpeg2000JasperReader Class Reference

Collaboration diagram for Jpeg2000JasperReader:

Public Member Functions
	Jpeg2000JasperReader (QIODevice *iod, const SubFormat format=Jp2Format)
	~Jpeg2000JasperReader ()
bool	read (QImage *pImage)
bool	write (const QImage &image, int quality)
	Opens the file data and attempts to decode it using the Jasper library.

Detailed Description

Definition at line 42 of file qjp2handler.cpp.

Constructor & Destructor Documentation

Jpeg2000JasperReader()

Jpeg2000JasperReader::Jpeg2000JasperReader	(	QIODevice *	iod,
		const SubFormat	format = Jp2Format
	)

Construct a Jpeg2000JasperReader using the provided imageIO. Note that currently the jasper library is initialized in this constructor, (and freed in the destructor) which means that:

• Only one instance of this class may exist at one time
• No thread safety

Definition at line 298 of file qjp2handler.cpp.

References QImageReader::allocationLimit(), and qDebug.

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~Jpeg2000JasperReader()

Jpeg2000JasperReader::~Jpeg2000JasperReader

(

)

Definition at line 326 of file qjp2handler.cpp.

References qDebug.

Member Function Documentation

read()

bool Jpeg2000JasperReader::read

(

QImage *

pImage

)

Opens the file data and attempts to decode it using the Jasper library. Returns true if successful, false on failure

Definition at line 347 of file qjp2handler.cpp.

References QImageIOHandler::allocateImage(), QByteArray::data(), QImage::Format_ARGB32, QImage::Format_Grayscale8, QImage::Format_Invalid, QImage::Format_RGB32, imageData, qDebug, QIODevice::readAll(), and QByteArray::size().

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write()

bool Jpeg2000JasperReader::write	(	const QImage &	image,
		int	quality
	)

Opens the file data and attempts to decode it using the Jasper library.

Returns true on success, false on failure.

32-bit and color mapped color images are encoded as RGB images, color mapped grayscale images are encoded as grayscale images

Definition at line 756 of file qjp2handler.cpp.

References QImage::allGray(), QString::arg(), QByteArray::constData(), QImage::depth(), QImage::hasAlphaChannel(), QImage::height(), Jp2Format, qDebug, qstrdup(), str, QString::toLatin1(), QImage::width(), and QIODevice::write().

Referenced by QJp2Handler::write().

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

• qtimageformats/src/plugins/imageformats/jp2/qjp2handler.cpp