On Fri, Feb 19, 2016 at 11:39:10AM +0900, Michel Dänzer wrote:
> From: Michel Dänzer <michel.daen...@amd.com>
>
> present_unflip may be called several times from present_check_flip_window
> during the same unflip. We can only copy to the screen pixmap the first
> time, otherwise we may scribble over other windows. The flip pixmap
> contents don't get updated after the first time anyway.
>
> Fixes at least the following problems, which were introduced by commit
> 806470b9 ("present: Copy unflip contents back to the Screen Pixmap"):
>
> On xfwm4 without compositing, run glxgears and put its window into
> fullscreen mode to start flipping. While in fullscreen, open the xfwm4
> window menu by pressing Alt-Space. The window menu was invisible most
> of the time because it was getting scribbled over by a repeated unflip
> copy.
>
> When switching a flipping window out of fullscreen, a repeated unflip
> copy could leave artifacts of the flip pixmap on the desktop.
>
> Signed-off-by: Michel Dänzer <michel.daen...@amd.com>
And the ordering is better: we should do the restoration of the contents
before we restore the window->pixmap linkage.
Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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