[Interest] QML and OpenGL conflicts

Koehne Kai Kai.Koehne at theqtcompany.com
Thu Jun 4 14:40:32 CEST 2015

> -----Original Message-----
> From: Marc Gilleron [mailto:marc.gilleron at gmail.com]
> Sent: Thursday, June 04, 2015 2:32 PM
> To: Koehne Kai
> Cc: interest at qt-project.org
> Subject: Re: [Interest] QML and OpenGL conflicts
> I'm not sure where to set it, do you mean QSG_RENDER_LOOP is really an
> environment variable like PATH on Windows? Oo

Yes, see also http://doc.qt.io/qt-5/qtquick-visualcanvas-scenegraph.html .

> As for QQUickFrameBufferObject... I'm not sure how it will work.
> Our application creates its own context and has nothing to do with Qt in the
> first place. Because of its nature, all we can get from it is a native window
> handle.
> Also, it performs OpenGL calls without bounds: they can happen not only in
> our render() operation, because it's a pretty big project, other parts use
> resources that implicitely get OpenGL called, and the main loop is
> monothread...

So maybe you want to turn it around, and explicitly control the scene graph loop via QQuickRenderControl (see also above link).



PS: I don't have own experience which such integrations, just commenting from a high-level perspective ... 

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