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List:       kde-bugs-dist
Subject:    [kwin] [Bug 328951] New: Save intermediate rendering results in Blur effect produces garbage in fade
From:       Martin Gräßlin <mgraesslin () kde ! org>
Date:       2013-12-18 7:18:45
Message-ID: bug-328951-17878 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=328951

            Bug ID: 328951
           Summary: Save intermediate rendering results in Blur effect
                    produces garbage in fade effect
    Classification: Unclassified
           Product: kwin
           Version: 4.11.4
          Platform: Debian testing
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: effects-various
          Assignee: kwin-bugs-null@kde.org
          Reporter: mgraesslin@kde.org

Created attachment 84150
  --> https://bugs.kde.org/attachment.cgi?id=84150&action=edit
Video illustrating the problem with Systemsettings tooltips

When using save intermediate rendering results in Blur effect one can observer
rendering problems during the fade out of blurred windows.

Steps to reproduce:
1. Set animation speed to very slow to properly observe
2. Enable blur with save intermediate rendering results
3. Open Systemsettings
4. move the mouse around to show and hide tooltips

Expected Results:
Normal fade in and fade out

Actual Results:
Ugly tearing effects. See attached video. The video doesn't capture the
complete tooltips. Please ignore the cut-off part. The parts of the tooltips
which are captured show the problem.

Workaround:
Disable save intermediate rendering results in blur effect

The problem is both present in 4.11 branch and master branch. The video is
recorded with 4.11 branch.

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