Provided by: qt3-doc_3.3.8-b-8ubuntu3_all bug


       QImageFormatType - Factory that makes QImageFormat objects


       #include <qasyncimageio.h>

   Public Members
       virtual ~QImageFormatType ()
       virtual QImageFormat * decoderFor ( const uchar * buffer, int length ) = 0
       virtual const char * formatName () const = 0

   Protected Members
       QImageFormatType ()


       The QImageFormatType class is a factory that makes QImageFormat objects.

       Whereas the QImageIO class allows for complete loading of images, QImageFormatType allows
       for incremental loading of images.

       New image file formats are installed by creating objects of derived classes of
       QImageFormatType. They must implement decoderFor() and formatName().

       QImageFormatType is a very simple class. Its only task is to recognize image data in some
       format and make a new object, subclassed from QImageFormat, which can decode that format.

       The factories for formats built into Qt are automatically defined before any other factory
       is initialized. If two factories would recognize an image format, the factory created last
       will override the earlier one; you can thus override current and future built-in formats.

       See also Graphics Classes, Image Processing Classes, and Multimedia Classes.


QImageFormatType::QImageFormatType () [protected]

       Constructs a factory. It automatically registers itself with QImageDecoder.

QImageFormatType::~QImageFormatType () [virtual]

       Destroys a factory. It automatically unregisters itself from QImageDecoder.

QImageFormat * QImageFormatType::decoderFor ( const uchar * buffer, int length ) [pure virtual]

       Returns a decoder for decoding an image that starts with the bytes in buffer. The length
       of the data is given in length. This function should only return a decoder if it is
       certain that the decoder applies to data with the given header. Returns 0 if there is
       insufficient data in the header to make a positive identification or if the data is not

const char * QImageFormatType::formatName () const [pure virtual]

       Returns the name of the format supported by decoders from this factory. The string is
       statically allocated.



       Copyright 1992-2007 Trolltech ASA,  See the license file
       included in the distribution for a complete license statement.


       Generated automatically from the source code.


       If you find a bug in Qt, please report it as described in  Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to
       Please include the name of the manual page (qimageformattype.3qt) and the Qt version