On 05/11/2012 09:09 PM, ext Pierre-Étienne Messier wrote: > Hello all, > > I wrote a small demo application using a OpenGL render thread similar to > the solution presented in QQ > (http://doc.qt.nokia.com/qq/qq06-glimpsing.html#writingmultithreadedglapplications > / http://mih.voxindeserto.de/threadedcube.html) which runs fine. > > Now, I'd like to render QWidgets (QDialog for instance) on the OpenGL > scene, as presented in QQ > (http://doc.qt.nokia.com/qq/qq26-openglcanvas.html). In fact, I do not > require an QGraphicsView in the app, it's just the only solution I see > right now to display QWidgets on the OpenGL viewport. > > In the first threaded solution, I fully have control over the OpenGL > context. However, in the second solution, The QGraphicsView calls > automagically makeCurrent() and I wonder how can this could work with my > render thread. Can the threading improvements in QGLWidget in 4.8 solve > this issue (we are still on 4.7)? > > Thank you and have a nice day! > > Pierre-Étienne Messier
I don't think you can get QGraphicsView to render in another thread. Another approach might be to do the heavy OpenGL rendering in a separate thread, into an FBO, that you then render as part of the QGraphicsView scene or in QGraphicsViewdrawBackground(). With QQuickView in Qt 5 on the other hand, we're aiming to do the rendering by default in a separate thread, including any custom OpenGL rendering with QtQuick 2 items on top. -- Samuel _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
