[Bug 53153] New: SetWindowPos() incorrectly computes exposure region of parent window with WS_EX_COMPOSITED
WineHQ Bugzilla
wine-bugs at winehq.org
Mon Jun 13 11:11:13 CDT 2022
https://bugs.winehq.org/show_bug.cgi?id=53153
Bug ID: 53153
Summary: SetWindowPos() incorrectly computes exposure region of
parent window with WS_EX_COMPOSITED
Product: Wine
Version: 7.10
Hardware: x86-64
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: wineserver
Assignee: wine-bugs at winehq.org
Reporter: jinoh.kang.kr at gmail.com
Distribution: ---
If a window is composited (i.e. has WS_EX_COMPOSITED set and is not using
parent DC) and repaint is triggered by calling SetWindowPos() on its child
window, the parent window's exposed region shall be the union of the old and
new visible region, *not* the difference.
Affected applications:
- KakaoTalk banner ad window is not re-painted correctly on ad rollover,
causing text artifacts from remains of the previous ad.
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