[PATCH xserver] xinerama: Implement graphics exposures for window->pixmap copies (v4)

[Adam Jackson]

On Wed, 2016-11-02 at 12:49 -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)
> v4: Clamp the region to 15 bits to avoid overflow (Keith Packard)
> 
> Signed-off-by: Adam Jackson <ajax at redhat.com>

Right, been iterating on this patch since September 2014, I'm tired of
waiting. Merged sans further review:

remote: I: patch #119683 updated using rev e337de2d488a124e5fee0fdcb882567b68f1767d.
remote: I: 1 patch(es) updated to state Accepted.
To ssh://git.freedesktop.org/git/xorg/xserver
   f1f865e..e337de2  master -> master

- ajax