[Qt-interest] QPixmap return null pixmap on VC

[OS Prog]

Hi,

The output of: "qDebug() << QImageReader::supportedImageFormats();" is:

*("bmp", "pbm", "pgm", "png", "ppm", "xbm", "xpm") *


Best regards,
Nikolay


>  Ok, then something seems to go wrong with your plugin loading. (Png is
>> handled directly in QtGui, thus needs no plugin) Two more questions: - Did
>> you move the Qt directory to another directory after building Qt? - Does the
>> output of "qDebug() << QImageReader::supportedImageFormats();" contain
>> "jpeg" or "jpg"? Regards, Alessandro OS Prog wrote:
>>
>>> > Hi,
>>> > > Thanks for the reply!
>>> > > Yes the dll(s) are built:
>>> > 07/04/2009  16:55           120,832 qjpeg4.dll
>>> > 07/04/2009  16:55               845 qjpeg4.exp
>>> > 07/04/2009  16:55             2,032 qjpeg4.lib
>>> > 07/04/2009  16:55           235,008 qjpegd4.dll
>>> > 07/04/2009  16:55               848 qjpegd4.exp
>>> > 07/04/2009  16:55           660,024 qjpegd4.ilk
>>> > 07/04/2009  16:55             2,044 qjpegd4.lib
>>> > 07/04/2009  16:55         1,092,608 qjpegd4.pdb
>>> > > Yes, with .png it works.
>>> > > Regards,
>>> > Nikolay
>>> > > >
>>> ----------------------------------------------------------------------
>>> > >     Message: 1
>>> >     Date: Thu, 09 Apr 2009 12:54:16 +0200
>>> >     From: Alessandro Portale <alessandro.portale at trolltech.com
>>> >     <mailto:alessandro.portale at trolltech.com>>
>>> >     Subject: Re: [Qt-interest] QPixmap return null pixmap on VC
>>> >     To: qt-interest at trolltech.com <mailto:qt-interest at trolltech.com>
>>> >     Message-ID: <49DDD3D8.7040405 at trolltech.com
>>> >     <mailto:49DDD3D8.7040405 at trolltech.com>>
>>> >     Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>> > >     Hi,
>>> > >     I have two questions in order to narrow down what goes wrong:
>>> >     - Was the <qtfolder>/plugins/imageformats/qjpeg[d]4.dll built?
>>> >     - Would it work with a .png image?
>>> > >     Regards,
>>> >     Alessandro Portale
>>> > >     OS Prog wrote:
>>> >      > Hi,
>>> >      >
>>> >      > The code:
>>> >      > QPixmap *pixmap1 = new QPixmap("images/scroll.jpg");
>>> >      >
>>> >      > returns a null pixmap when I build it with VC. The same code
>>> >     works when
>>> >      > it is built with mingw.
>>> >      > I tried to specify the whole path, like "QPixmap *pixmap1 = new
>>> >      > QPixmap("C:/Work/SVN/Qt/VCProj/debug/images/scroll.jpg");", but
>>> it is
>>> >      > the same.
>>> >      >
>>> >      > Where could be the problem?
>>> >      >
>>> >      > I just compiled the Qt SDK for Windows with "VC2008 Express"'s
>>> >     compiler
>>> >      > in separate folder. The original folder is with mingw.
>>> >      >
>>> >      > Regards,
>>> >      >
>>>
>>
>   Nikolay
>>
>>
>
>
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