On Fri, Aug 15, 2003 at 12:06:18PM +0200, Michel Dänzer wrote: > On Wed, 2003-08-13 at 16:29, Andy Isaacson wrote: > > I'm not familiar with how those two X servers operate, so could you help > > me out by explaining? How do they handle window obscures? How is it > > different from X11's BackingStore? > > I don't know a lot of details yet, but they indeed always keep the > contents of windows around and composite the desktop with them > (actually, they have another windowing system do this, but that's not > the point).
Seems to me you've got to break X11 semantics in order to do this: I suppose they must disable PartiallyObscured events, otherwise the "hidden" portion of the app windows won't get updated. > > too often the BS pixmap is too old, and the X server writes it to the > > framebuffer only to have it overwritten by the app as soon as it's > > scheduled. > > Well, do you want the windows to be refreshed ASAP or not? :) I don't > think this is a big deal as the windows will be kept in video RAM > whenever possible. I want the window contents to be correct, or at least, innocuous. I agree that if the backing store is kept in the off-screen framebuffer the overhead is minimal; I don't think XFree86's BS implementation can do that. In general I want the system to work correctly an in a performant manner even if the number of windows exceeds available off-screen framebuffer memory. -andy _______________________________________________ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
