[PATCH] glamor: don't do render ops with matching source/dest (v3)

[Eric Anholt]

Dave Airlie <airlied at gmail.com> writes:

> From: Dave Airlie <airlied at redhat.com>
>
> XRender defines this, GL really doesn't like it.
>
> kwin 4.x and qt 4.x seem to make this happen for the
> gradient in the titlebar, and on radeonsi/r600 hw
> this draws all kinds of wrong.
>
> v2: bump this up a level, and check it earlier.
> (I assume the XXXX was for this case.)
> v3: add same code to largepixmap paths (Keith)

Reviewed-by: Eric Anholt <eric at anholt.net>
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