[Wayland-bugs] [Bug 56537] New: Repaint culling under opaque surfaces broken

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56537

          Priority: medium
            Bug ID: 56537
                CC: conselvan2 at gmail.com
          Assignee: wayland-bugs at lists.freedesktop.org
           Summary: Repaint culling under opaque surfaces broken
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: krh at bitplanet.net
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: weston
           Product: Wayland

Commit 547149a9c266496f84ac785d9632e4280405d631 broke the optimization of
clipping away damage below an opaque surface.  I think the fix is to track
opaqueness per weston_plane and use that to discard damage, but then track
global opaqueness, that is, accross all planes and use that to clip repainting.

How to reproduce: put simple-egl under the opaque area of weston-terminal,
enable repaint debugging.  Observe how simple-egl is repainted.

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