On Sat, Jun 26, 2004 at 09:18:03AM -0400, hx wrote: > > Hi directfb-dev. > > > > I've been toying with DirectFB for about a week now on an > > embedded platform that uses the AMD (formerly NSC) Geode GX1. > > I'm pretty impressed with DirectFB. > > > > I would like to use pthreads with DirectFB. What does it > > take to do this? The DirectFB core must be threadsafe > > because it runs multiple threads. But what about the > > interfaces, particularly IDirectFBSurface structures?
They are not thread safe. With IDirectFBSurface you don't necessarily require any locking. You can access the same core surface with multiple IDirectFBSurface interfaces via IDirectFBSurface::GetSubSurface(). The only catch is that only the first IDirectFBSurface may use page flipping. Sub-surfaces will always do a back-to-front copy on Flip(). If you do your own locking around the DirectFB interfaces you should be able to do anything. My only personal pthread + DirectFB code was with mplayer where I moved the Flip() call to another thread so that the decoding process could continue while waiting for the flip to occur. As I recall it worked just fine. -- Ville Syrj�l� [EMAIL PROTECTED] http://www.sci.fi/~syrjala/
