[Intel-gfx] FireFox performance regressions XAA -> EXA -> UXA

[Clemens Eisserer]

> Whether the driver uses xaa, exa or uxa should be mostly invisible to
> the client though?  It doesn't affect whether the server supports the
> render extension, just how it's handled internally, so shouldn't change
> how cairo does stuff.  Or am I missing something?

Yes, you're right. With XAA most RENDER requests simply end up
somewhere in pixman.
Therefore, firefox/cairo should behave the same, sending exactly the
same requests/commands (minus possible workarrounds) to the X-Server
in the XAA/EXA/UXA case.

- Clemens