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Windows: Fix calculation of frame offset for layered windows.

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Pass 0 window to High DPI scaling function to prevent it from
trying to find a screen and applying a screen offset.

Task-number: QTBUG-49516
Change-Id: Ib3e1919985f2c6df1dd8369f6e28b3ee1fdb7afe
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
This commit is contained in:
Friedemann Kleint 2015-11-20 09:45:53 +01:00
parent 296eb88e1c
commit 8928076231
1 changed files with 2 additions and 1 deletions
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3
src/plugins/platforms/windows/qwindowsbackingstore.cpp
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@ -84,7 +84,8 @@ void QWindowsBackingStore::flush(QWindow *window, const QRegion &region,
if ((flags & Qt::FramelessWindowHint) && QWindowsWindow::setWindowLayered(rw->handle(), flags, hasAlpha, rw->opacity()) && hasAlpha) {
// Windows with alpha: Use blend function to update.
QRect r = QHighDpi::toNativePixels(window->frameGeometry(), window);
QPoint frameOffset(QHighDpi::toNativePixels(QPoint(window->frameMargins().left(), window->frameMargins().top()), window));
QPoint frameOffset(QHighDpi::toNativePixels(QPoint(window->frameMargins().left(), window->frameMargins().top()),
static_cast<const QWindow *>(Q_NULLPTR)));
QRect dirtyRect = br.translated(offset + frameOffset);
SIZE size = {r.width(), r.height()};