QImageFormatType - Factory that makes

       #include <qasyncimageio.h>

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

   Protected Members
       QImageFormatType ()


DESCRIPTION

       Factory that makes QImageFormat objects.

       While 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, thus you can
       override current and future built-in formats.


MEMBER FUNCTION DOCUMENTATION


QImageFormatType::QImageFormatType () [protected]

       Constructs a factory. It automatically registers itself
       with QImageDecoder.


QImageFormatType::~QImageFormatType () [virtual]

       Destroys a factory. It automatically unregisters itself
       from QImageDecoder.


virtual QImageFormat* QImageFormatType::decoderFor ( const uchar

       * buffer, int length ) [virtual]
       Returns a decoder for decoding an image which starts with
       the give bytes. This function should only return a decoder
       if it is definite 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 recognized.

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


SEE ALSO

       http://doc.trolltech.com/qimageformattype.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
       make our job much simpler. Thank you.

       In case of content or formattting problems with this
       manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page
       (qimageformattype.3qt) and the Qt version (2.3.1).


Man(1) output converted with man2html