[Development] QtSC: Scene Graph discussion

[Sletta Gunnar]

On Aug 2, 2013, at 10:25 AM, Laszlo Papp <lpapp at kde.org>
 wrote:

> On 2 August 2013 08:39, Sletta Gunnar <Gunnar.Sletta at digia.com> wrote:
> 
> On Aug 1, 2013, at 10:59 AM, Laszlo Papp <lpapp at kde.org> wrote:
> 
> > On Thu, Aug 1, 2013 at 8:17 AM, Sletta Gunnar <Gunnar.Sletta at digia.com> wrote:
> > Indeed, the proposed patch created an new library (which was only built when manually cd'ing into src/scenegraph and building it there) which would not have been usable together with Qt Quick (until Qt 6, that is).
> >
> > I would be personally more than happy for scene graph to become compact, i.e. qml and qtquick being a separate layer. I do not mind in which repository this separation happens in; that is just details for me, not a technology show stopper. That brings me to my question: although I was attending to the session, have you discussed this out of the session with others?
> >
> 
> Have I discussed it outside, yes. I posted a mail to the mailing list a month or so back with little response and I've discussed it with a couple of people directly. The topic usually ends on: what is the benefit of using the stripped-down SG API, without text support, when you could do much the same and probably do something even faster, dedicated for your purpose using raw OpenGL.
> 
> What is blocking the text support being added later if it is not yet available?

Just work :) The text nodes were not written with a clean separation between SG and Quick APIs in mind.

>  
> The new renderer, I've been working on will make it a bit harder to beat, but for a specific usecase, raw OpenGL will always be better.
> 
> 5.2 material or later?

I would hope 5.2

>  
> I think 1. makes sense regardless, because it makes the codebase cleaner. The session kinda concluded that 2-4 are not needed. Then again, if 1 is in place, pulling that into its own library which can be used stand-alone is pretty simple, so the presence of 2-4 is less pressing.
> 
> The audience may not need it, but I would. :-) "less pressing" means it is not high priority for you, but contribution is welcome?

1 makes it possible for anyone to do 2-4 outside of Qt, and unless there are convincing arguments why they should be there in Qt, I don't think they should be there.