Bug 15823 - Mixed redirected/unredirected windows corrupt clip lists
Summary: Mixed redirected/unredirected windows corrupt clip lists
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/General (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
Depends on:
Blocks: xorg-7.4
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Reported: 2008-05-04 21:34 UTC by Owen Taylor
Modified: 2008-05-06 10:04 UTC (History)
0 users

See Also:
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Description Owen Taylor 2008-05-04 21:34:55 UTC
Originally reported as:


If you have a set of redirected windows (that don't clip the
parent window), and then map a window above them that isn't
redirected, such as the composite overlay window, the border
clip for the redirected windows becomes invalid due to a logic
error in miValidateTree, and this spreads eventually to the 
parent window as well.

The symptom is then then that drawing on the parent window
isn't clipped by the non-redirected window, causing various
types of visual corruption and artifacts.
Comment 1 Owen Taylor 2008-05-05 05:35:43 UTC
commit 6c1accce87c9bd640c1b4bbc49bae7d44b1cc97b
Author: Keith Packard <keithp@keithp.com>
Date:   Sun May 4 21:51:08 2008 -0700

    Empty the borderClip of manual redirect windows. (bug 15823)
    Thanks to Owen Taylor for root-causing this one.
    If a TreatAsTransparent window has any area in the borderClip, that will be
    added to the totalClip region for use by other windows. That's wrong.
    Instead, simply empty the borderClip for TreatAsTransparent windows right up
Comment 2 Adam Jackson 2008-05-06 10:04:24 UTC
Cherry-picked to 1.5 branch.  Thanks!

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