On Mon, November 26, 2012 17:42:18 Florian Boucault wrote: > 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
Hm right ... I knew about it, but I've rarely used it. I should, thx for the reminder :) > > 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 > > [email protected] > > http://lists.qt-project.org/mailman/listinfo/interest _______________________________________________ Interest mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/interest
