[Bug 81493] graphics corruption (gm45 + git SNA)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81493

--- Comment #8 from Chris Wilson <chris at chris-wilson.co.uk> ---
It is worth checking to see if

commit 48a33fc379b17eed195875222ad773c911d9dff1
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Sep 2 19:08:36 2014 +0100

    sna/trapezoids: Use the corrected trapezoid origin for aligned boxes

    The rule for the origin of the CompositeTrapezoids routine is the
    upper-left corner of the first trapezoid. Care must be taken in case the
    trapezoid edge is upside down to consider the upper vertex.

has any impact here. That's me being optimistic.

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