[Bug 1061073]

[Wojtask9]

(In reply to comment #21)
> wojtek, your issue with GLES is also reproducible on nouveau and radeon
> drivers. Your issue is not duplicate of this bug.

git bisect bad
e1cb50b15dbb75d1ba0fe184d05be7d302b058ee is the first bad commit
commit e1cb50b15dbb75d1ba0fe184d05be7d302b058ee
Author: Robert Bragg <robert at linux.intel.com>
Date:   Tue Sep 18 16:10:03 2012 +0100

    SwapBuffersRegionNOK: invert rectangles on y axis
    
    The EGL_NOK_swap_region2 spec states that the rectangles are specified
    with a bottom-left origin within a surface coordinate space also with a
    bottom left origin, so this patch ensures the rectangles are flipped
    before passing them on to dri2_copy_region.
    
    Fixes piglit's egl-nok-swap-region test.
    
    Tested-by: Matt Turner <mattst88 at gmail.com>
    (cherry picked from commit 0a523a8820e8a2549ac1c7887eb1892b228af44b)

this commit introduced regression on my system (kwin_gles)
I'll reopen https://bugs.freedesktop.org/show_bug.cgi?id=55856

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Title:
  Desktop effects are slow and desktop corruption using mesa 9

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