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Bug 1633343. Also use the style WS_EX_TRANSPARENT on the compositor window. r=sotaro

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The original workaround given by Microsoft was both WS_EX_TRANSPARENT and WS_EX_LAYERED. In bug 1627505 we tried to just add WS_EX_LAYERED because it was all that was needed to fix that bug and we hoped it wouldn't re-introduce the blank window problem. But it did. So we may as well go with both flags as recommended by Microsoft.

Differential Revision: https://phabricator.services.mozilla.com/D72598
This commit is contained in:
Timothy Nikkel 2020-04-27 13:27:07 +00:00
parent 94ecd85385
commit 38a1920e37
1 changed files with 1 additions and 1 deletions
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widget/windows/WinCompositorWindowThread.cpp
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@ -162,7 +162,7 @@ WinCompositorWnds WinCompositorWindowThread::CreateCompositorWindow() {
DWORD extendedStyle = WS_EX_NOPARENTNOTIFY | WS_EX_NOREDIRECTIONBITMAP;
if (!StaticPrefs::apz_windows_force_disable_direct_manipulation()) {
extendedStyle |= WS_EX_LAYERED;
extendedStyle |= WS_EX_LAYERED | WS_EX_TRANSPARENT;
}
compositorWnd = ::CreateWindowEx(