[libcamera-devel] Trying to use libcamera with Qt

[Laurent Pinchart]

Hi Jason,

On Fri, Mar 26, 2021 at 03:01:10PM +0100, Jason H wrote:
> 
> > > So it looks I was wrong about Q_OBJECT being the gatekeeper. Once I
> > > config no_keywords in Qt, it works. It's a shame I have to do that for
> > > one variable name.
> >
> > Sorry about that :-( We do the same in our qcam test application. Qt
> > defines 'signals' and 'slots' as keywords by default, but that can
> > indeed clash with third-party code. Using Q_SIGNALS and Q_SLOTS instead
> > with no_keywords may not look very native, but hopefully it will be an
> > acceptable solution for you.
> 
> Well I'm glad there's a way to get it to work. But this happens at project
> scope, meaning that EVERY QObject class definition has to be altered.
> Meaning that that one line of code changes about 15 classes, 30 lines
> in my project because it's Q_SIGNALS and Q_SLOTS.

As the no_keywords qmake option turns into a QT_NO_KEYWORDS macro, could
the latter be used instead, at file scope ?

> > > It is the project using Boost at all? It doesn't look like it, but I
> > > am not a boost expert.
> >
> > Only in the Raspberry Pi Image Processing Algorithms module, to parse
> > the configuration file, and we're working on an alternative
> > implementation that won't require Boost.
> 
> I am very happy to hear this, because all I want to do is grab frames from
> the camera. It shouldn't be that hard, shouldn't require boost to do that.
> That was the appeal of the raspicam library. I'm using this fork:
> https://github.com/manalito/raspicam

-- 
Regards,

Laurent Pinchart