New subject: [Bug 54137] A non-WM_CLIPCHILDREN window's repaint region is not computed correctly when its child is resized or repositioned

Dec. 13, 2022

      https://bugs.winehq.org/show_bug.cgi?id=54137

            Bug ID: 54137
           Summary: A non-WM_CLIPCHILDREN window's repaint region is not
                    computed correctly when its child is resized or
                    repositioned
           Product: Wine
           Version: 8.0-rc1
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wineserver
          Assignee: wine-bugs(a)winehq.org
          Reporter: jinoh.kang.kr(a)gmail.com
                CC: timoninvlad(a)yandex.ru
   Regression SHA1: 33617af8145b6fadfe41d48968a728ff57b3064b
      Distribution: ---

Wine sometimes under-calculates the repaint region of non-WM_CLIPCHILDREN
non-WM_EX_COMPOSITED windows with a child window that has been resized or
repositioned.

Reported affected applications include regedit.exe and Unity Assets Bundle
Extractor.

The regression started with the following commit:

commit 33617af8145b6fadfe41d48968a728ff57b3064b
Author: Jinoh Kang <jinoh.kang.kr(a)gmail.com>
Date:   Mon Oct 31 22:30:20 2022 +0900

    server: Don't invalidate the newly exposed child region on the parent if it
doesn't clip children.

    This partly reverts e42eaaaf3a873d29b14f8f3a3617df2d0d4210ca.

    Signed-off-by: Jinoh Kang <jinoh.kang.kr(a)gmail.com>

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[Bug 54137] New: A non-WM_CLIPCHILDREN window's repaint region is not computed correctly when its child is resized or repositioned

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