Resources not accessible when running outside of qtcreator [SOLVED / Problem related to unsopported image file formats]

billouparis

Qt 4.7.0 / Win32 / mingw

Hello, I have this application opening several images files that are stored inside a resouce file, through the simple QImage::load method.
When executing this from within qtcreator IDE, this application works smoothly. The files are accessed with ":/somedir1/filename.ext"
But, when I start the application outside of qtcreator, by double clicking on the .exe file, it reports that some of my resources files can not be accessed. The WEIRD thing is that it depends on the PC I try to run the application on, it's working smoothly on two PC, but not on the third I tested. Do you see any reasons why?
Thank you,
Bill

giesbert

Could be that the image format plug-ins are not found in the stand alone case. Search the forum on that, it has already many discussions on that.

DenisKormalev

Do you have resources embedded into your binary? Or you have them as external files that you load on run-time?

billouparis

I guess they are embedded in the binary, I have done nothing specific. The qrc files are listed in the .pro file.

giesbert

Then they are embedded. Now, what could happen, is that the image format plug-ins are not available. They are needed. see "this thread.":http://developer.qt.nokia.com/forums/viewthread/4440/

billouparis

Thank you, I am having a look now!

DenisKormalev

Yep, I'm agreed with Gerolf. Looks like plugins are not available.

billouparis

Thank you both, gonna try this afternoon or maybe in one week, and will let you know,

Bill

billouparis

We can lock this thread, the whole thing it working when copying the image decoding dll in the output directory. Thank you for the hint. I guess it is possible to simply link this library statically then? If you know how, I am interested!
Thanks,
Bill

giesbert

if you want to link the plugins statically, you need a static Qt build. otherwise they need to be put to the correct folders and will then be loaded dynamically by Qt itself.

goetz

Static linking is suboptimal when plugins enter the game. I recommend that you create an installer for windows (eg. with InnoSetup or some of its also free alternatives).

billouparis

Thank you both,
Bill