[Xorg] Re: Damage/Composite + direct rendering clients

[Ian Romanick]

Andy Ritger wrote:

> The other concern (how to make sure direct rendering has completed
> by the time the drawable is used as a source in a composite
> operation) conceptually would be solved as you describe, but I
> expect the implementation would be buried deeper

I guess I don't see what the problem is.  The graphics device processes 
commands as a FIFO.  Groups of direct rendering commands are surrounded 
by a lock.  If the compositor uses the same lock, synchronization and 
proper ordering are guaranteed.

Determining if direct rendering has damaged a region is another kettle 
of fish, though...