On Tue, 22 Jul 2008 19:10:27 +1000 Lorn Potter <[EMAIL PROTECTED]> babbled:
> Tilman Baumann wrote: > > And not using x11 is probably a very sane step, if you can live > > without the portability factor. (That's porting other apps) > > There is no portability factor. Only which toolkit is available. > > As one of our engineers here said on our internal discussion (and goes > back to rasters comment): > > "One of the neat advantages of Qtopia on Qt for Embedded Linux is that > there is little penalty in converting back and forth between a QImage > and QPixmap so we have used this extensively which makes quite a few > things much easier and more possible than if things are based on X11 > where these conversions are expensive and you then need to put a bit > more thought in to it. " yup. for qws your conversions are cheap/almost free, but in x11 - not so. it probably is a matter of working with the x11 port of qtopia or changing the assumption that such conversions are cheap/free (eg never even using pixmaps - do everything software-rendered in client-space virtual framebuffers, as this is exactly what happens with qtopia on qws with a dumb fb anyway). this will never allow seamless acceleration and gfx-chip side functions doing as much work as they can, but will probably function about as well as qtopia with qws natively on a freerunner. so indeed - you are right. you made an ASSUMPTION of qws and these things being cheap conversions - though that may not be the case for some accelerated back ends for qws... but anyway - it can be improved.many options as to how to do it. x11 itself is not really a performance bottlneck - it is just the way you use it that makes the difference between it being "a blocker for performance" and a "it doesnt matter". :) -- Carsten Haitzler (The Rasterman) <[EMAIL PROTECTED]> _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
