Unix/Linux Go Back    


RedHat 9 (Linux i386) - man page for qimageformat (redhat section 3qt)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


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)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 09:46 AM.