Hi Niels, thanks for the trick. After a few more investigation, I just patched SaWMan to avoid it to change the buffermode of the layer. Maybe this should be an option to use this optimization... My framebuffer driver might be buggy to not be able to change the layer mode without flicking... I don't know. I also would like to add that I have seen some unrefreshed screen zone when using windows and moving+scaling them over the screen. Are you aware of such bugs in SaWMan (also seen it in the default window manager) ?
Regards, -- Lionel Landwerlin On Tue, Mar 2, 2010 at 12:08 PM, Niels Roest <ni...@directfb.org> wrote: > Hi Lionel, > I have not looked in close detail, but SaWMan has an optimization to align > the layer to the window if only one window is displayed - this holds for > size and location. I think you are hitting this, but I don't know why it > would go from double to single bufferend in that case. > The switching behaviour can be prevented by having the SaWMan callback > layer_reconfig() disallowing all changes (not returning DFB_OK). > > Greets > Niels > > Lionel Landwerlin wrote: >> >> Hi all, >> >> I'm playing a little bit with SaWMan these days, and I noticed a >> strange flicking effect. >> Here is my setup : >> - a 1280x720 layer double buffered at start >> - a 1280x720 window containing a main application >> - 2/3 300x200 windows acting as widgets on top of the main application >> window >> >> When I destroy the 300x200 windows, and then I recreate one of them, >> I'm noticing a >> flickering effect of the whole screen. With a few investigation I >> found that at this moment, >> SaWMan reconfigure the layer to change its buffermode from double >> buffered to single >> buffered. >> >> Any explanation ? >> >> Regards, >> >> -- >> Lionel Landwerlin >> _______________________________________________ >> directfb-dev mailing list >> directfb-dev@directfb.org >> http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev >> >> > > > -- > > .------------------------------------------. > | DirectFB - Hardware accelerated graphics | > | http://www.directfb.org/ | > "------------------------------------------" > _______________________________________________ directfb-dev mailing list directfb-dev@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev
