[PATCH xserver] glamor: Cannot use copies when accessing outside of composite source

[Keith Packard]

Hans de Goede <hdegoede at redhat.com> writes:

> If you want a real-world test point firefox to:
>
> https://lkml.org/lkml/2015/8/25/738
>
> At least that is broken for me (skylake igpu + modesetting driver)
> and this patch fixes it.

Yes, Michel asked me to merge that patch a couple of days ago and I
finally got around to it this morning. Given that the existing code path
didn't deal with partially-obscured sources, the only reason to use the
fancier check was to leave us with one bug instead of two.

-- 
-keith
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