How to convert QString to QImage

[gunturrohith]

Hi anda_skoa,

I changed my application object to QCoreApplication.I didn't get any error in compile time,
but i am getting error in run time like this

QScreenLinuxFb::connect: No such file or directory
Error opening framebuffer device /dev/fb0
QScreenLinuxFb::connect: No such file or directory
Error opening framebuffer device /dev/fb0
QScreenLinuxFb::connect: No such file or directory
Error opening framebuffer device /dev/fb0
QScreenLinuxFb::connect: No such file or directory
Error opening framebuffer device /dev/fb0

our device don't have any LCD .Can you provide any solution

[anda_skoa]

Very strange, the QCoreApplication does not have code to load any QPA plugin, only QGuiApplication does.

Still, you could try providing the qminimal QPA plugin and using the -platform commandline switch to load it explicitly.

Cheers,
_

[gunturrohith]

Hi anda_skoa,

we are not using Qt-5,we are using Qt-4.7.4

[anda_skoa]

I see.

You'll have to check where the request for the framebuffer connection comes from, QImage quite certainly doesn't need it.

Alternatively you could look into providing a virtual framebuffer that the application would then work with, or a virtual X server, e.g. Xvfb

Cheers,
_

[gunturrohith]

Hi anda_skoa,

we are getting problem with QPainter.
Can you provide any link or documentation for Xvfb installation or configuration