Bug#816447: closed by Adam Majer <adamm@zombino.com> (Re: Bug#816447: QImage ignore headers of jpg files)

[Strelok <strelkov355@gmail.com>]

> Well, that is different. The problem is you can't name a .jpg file a
> .png file. Qt uses file extension for format detection by
> default.. QImageReader allows for more control in that.

>From QImage manual (http://doc.qt.io/qt-4.8/qimage.html) - "If the
format is not specified (which is the default), the loader probes the
file for a HEADER to guess the file format.". Maybe may English is
bad, but I'm don't see this a single word about file extension. At
least we have wrong manual.