On Wed, Aug 21, 2002 at 03:01:05PM +0200, Sven Neumann wrote: > Jeff Brubaker <[EMAIL PROTECTED]> writes: > > http://marc.theaimsgroup.com/?l=xfree-render&m=100293063519210&w=2 > > > > DirectFB uses a similar approach, judging by the PDF on the web site. > > not exactly. In DirectFB each window has its own surface thus no > window draws directly to the framebuffer. The window surfaces are then > composited onto the display layer's back buffer which is copied to the > front buffer when the window stack has been repainted. The only point > where the translucency of a window is considered is during window > stack repaints where this information is used to optimize unnecessary > compositing away. I'm however not sure what Keith means exactly when > he uses the word "overlay layer". It's most probably unrelated to the > DisplayLayer used in DirectFB.
Thanks for the explanation, Sven. I'm not 100% sure what Keith can gain out of his method since it seems like other operations such as when those (clipping sets change) would be expensive. Anyway, I hope that DirectFB S3 driver gets stable nice and soon so I can try your stuff out. :) Jeff -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe directfb-users" as subject.
