[PATCH xserver] xinerama: Implement graphics exposures for window->pixmap copies (v3)

[Adam Jackson]

On Thu, 2016-06-30 at 11:45 -0400, Adam Jackson wrote:
> This code is using GetImage to accumulate a logical view of the window
> image (since the windows will be clipped to their containing screen),
> and then PutImage to load that back into the pixmap.  What it wasn't
> doing was constructing a region for the obscured areas of the window and
> emitting graphics exposures for same.
> 
> v2: Fix coordinate translation when the source is the root window
> v3: Create sourceBox with the right coordinates initially instead of
> translating (Keith Packard)
> 
> Signed-off-by: Adam Jackson <ajax at redhat.com>

Ping, still valid.

- ajax