[PATCH xserver] glamor: Handle bitplane in glamor_copy_fbo_cpu

[Adam Jackson]

On Tue, 2016-07-12 at 12:39 +0900, Michel Dänzer wrote:
> From: Michel Dänzer <michel.daenzer at amd.com>
> 
> This can significantly speed up at least some CopyPlane cases, e.g.
> indirectly for stippled fills.
> 
> Reported-by: Keith Raghubar <keith.raghubar at amd.com>
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
> ---
> 
> The x/yoff deltas for fbCopyXtoX might be backwards, somebody please check.

If you mean of the temporary I'm not sure it matters. It's a fresh
pixmap, ->drawable.[xy] are going to be zero.

That said this produces visibly different results with Xephyr+glamor
and x11perf -copyplane10 (compared to fb), so I'm pretty sure something
about it is wrong.

- ajax