Hi Thomas, I have noticed similar issues on Linux based systems. I use the following environment variables that fixes the issue for me:
QML_FORCE_THREADED_RENDERER=1 Florian On 26/11/12 16:50, Thomas Senyk wrote: > Hi, > > the context of this is mail is: > - scenegraph > - FBO based effects > (plain shader-effects, qtgraphicaleffects, qt3d) > - embedded hardware / opengl es 2.0 > > > I've noticed that on a lot of embedded systems the FPS drops rather > drastically (e.g. from 60 to 30 with one effect, from 30 to 10-15 with two > effects) when using FBO based effects. > ... even simple effects, sometimes even if they have 'visible: false' > > Is this somewhat expected? > It does sound like a vsync vs. fbo problem ... doesn't it? > Is this a fault/bug in the embedded opengl drivers? > > Did anyone ever had a setup, using one or multiple FBO based effects did > still > result in 60fps? (as it should be for simple(!) effects?) > > > > This mail is 'vague' on purpose, I don't want to start a concrete technical > discussion ... I rather want to ask for opinion and experience. > > > Greets > Thomas > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
