Hi, in most cases Flip() of the entire screen does panning of display. The "backvideo" option points to it too. If you use window in your app the DirectFB does bitblit operation for the area of the window. Of course, this action slower than display panning. It will be especially slow if your hardware doesn't support the blitting with specified pixelformat. In this case DirectFB does mere memcpy() within video memory. I'd give you advice to try several different pixelformats for sake of finding the best performance.
2009/7/14 Karl Phillip <[email protected]>: > Hello, > > I'm trying to figure out how to overcome the following problem: > Situation 1: When the primary surface is created by a Layer and then > Flipped(), it has great performance, being executed in 0.00087 seconds. > Situation 2: When a Window is created by this same Layer and then the > primary surface is created by the Window... Flip() takes a lot longer to be > executed: 0.0752 seconds. > > In /etc/directfbrc I'm currently using (among other settings): > pixelformat=ARGB > hardware > desktop-buffer-mode=backvideo > window-surface-policy=systemonly (videoonly doesnt work!) > > I do need to use a Window in my application to be able to resize the surface > whenever I need. Can anyone shed some light on the subject? I did look in > the archives first and didnt found anything that could help me . > > Thanks all, > -- > Karl > > > > > _______________________________________________ > directfb-users mailing list > [email protected] > http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users > > -- Best Regards Nikita Egorov [email protected] [email protected] _______________________________________________ directfb-users mailing list [email protected] http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
