[Interest] Running as nobody, generating images

[Harri Pasanen]

On 02/09/2012 11:10 AM, Andreas Pakulat wrote:
> On 09.02.12 10:14:59, Harri Pasanen wrote:
>> Picking your collective brain here...
>>
>> I'm trying to do some batch style image processing with a Qt app, using
>> QImage.
>> As QCoreApplication / console everything compiled, but silently failed
>> at runtime.
>>
>> As QApplication with a MainWindow things started to work but looks like
>> a display is required.
>> I tried to set a timer to run my app on N9 using dbus/timed, and while
>> the application starts,
>> it seems to be always running as nobody:nogroup and thus fails, probably
>> as it cannot get
>> hold of the display.  The timed docs say that it should run as user,
>> using Maemo::Timed::Event::Action::runCommand, but that does not seem to
>> be the case.
>>
>> I've thought about porting libgd, or using python-imaging, but these are
>> almost overkill for me.
>> The only thing I'd really need is open png, drawPixmap(x,y) on it, save png.
> Sounds like you're using QPixmap, that one is a native GUI pixmap and
> hence requires a GUI application that connects to whatever draws the GUI
> on your device (X11 on Linux). If you just want to paint something on a
> png, simply use QImage only and then you can go back to
> QCoreApplication.
>
> Andreas

No, I'm using QImage, actually doing drawText on it, and that does not work.
Fonts are probably provided by the underlying window system, perhaps that
is the problem?

I'll try without the drawText...

Thanks for triggering further thinking.

Harri