QImageFormat(3qt)														 QImageFormat(3qt)

NAME

       QImageFormat - Incremental image decoder for a specific image format

SYNOPSIS

       #include <qasyncimageio.h>

   Public Members
       virtual int decode ( QImage & img, QImageConsumer * consumer, const uchar * buffer, int length ) = 0

DESCRIPTION

       The QImageFormat class is an incremental image decoder for a specific image format.

       By making a derived class of QImageFormatType, which in turn creates objects that are a subclass of QImageFormat, you can add support for
       more incremental image formats, allowing such formats to be sources for a QMovie or for the first frame of the image stream to be loaded as
       a QImage or QPixmap.

       Your new subclass must reimplement the decode() function in order to process your new format.

       New QImageFormat objects are generated by new QImageFormatType factories.

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

MEMBER FUNCTION DOCUMENTATION

int QImageFormat::decode ( QImage & img, QImageConsumer * consumer, const uchar * buffer, int length ) [pure virtual]
       New subclasses must reimplement this method.

       It should decode some or all of the bytes from buffer into img, calling the methods of consumer as the decoding proceeds to inform that
       consumer of changes to the image. The length of the data is given in length. The consumer may be 0, in which case the function should just
       process the data into img without telling any consumer about the changes. Note that the decoder must store enough state to be able to
       continue in subsequent calls to this method - this is the essence of the incremental image loading.

       The function should return without processing all the data if it reaches the end of a frame in the input.

       The function must return the number of bytes it has processed.

SEE ALSO

       http://doc.trolltech.com/qimageformat.html http://www.trolltech.com/faq/tech.html

COPYRIGHT

       Copyright 1992-2001 Trolltech AS, http://www.trolltech.com.  See the license file included in the distribution for a complete license
       statement.

AUTHOR

       Generated automatically from the source code.

BUGS

       If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html.  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 qt-bugs@trolltech.com.  Please include the name of the manual page
       (qimageformat.3qt) and the Qt version (3.1.1).

Trolltech AS							  9 December 2002						 QImageFormat(3qt)