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QNX: Fix screen rotation

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The behavior introduced by qtdeclarative's 475d1ed4f6a2 mandates that an
expose event follows a geometry change event. The fix for this uncovered a bug
on the raster backing store which caused the rotation to break on QtWidgets.
The problem was rooted on the assumption that the
QQnxRasterBackingStore::flush() method was only called after paints to the
backing store surface, which was discovered to be a false assumption. Flushing
the backing store can occur in other circunstances, which are out of scope on
the context of the QNX plugin.

Task-number: QTBUG-31329
Change-Id: Icfc3e85324f5a8745f6b5f189f27f8b763f770c7
Reviewed-by: Kevin Krammer <kevin.krammer@kdab.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
This commit is contained in:
Rafael Roquetto 2013-06-17 16:46:39 -03:00 committed by The Qt Project
parent 5f49467c52
commit 0343b92660
2 changed files with 7 additions and 1 deletions
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7
src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp
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@ -81,6 +81,12 @@ void QQnxRasterBackingStore::flush(QWindow *window, const QRegion &region, const
{
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << this->window();
// Sometimes this method is called even though there is nothing to be
// flushed, for instance, after an expose event directly follows a
// geometry change event.
if (!m_hasUnflushedPaintOperations)
return;
QQnxWindow *targetWindow = 0;
if (window)
targetWindow = static_cast<QQnxWindow *>(window->handle());
@ -117,7 +123,6 @@ void QQnxRasterBackingStore::flush(QWindow *window, const QRegion &region, const
// We assume that the TLW has been flushed previously and that no changes were made to the
// backing store inbetween (### does Qt guarantee this?)
Q_ASSERT(!m_hasUnflushedPaintOperations);
targetWindow->adjustBufferSize();
targetWindow->blitFrom(platformWindow, offset, region);

1
src/plugins/platforms/qnx/qqnxwindow.cpp
View File

@ -199,6 +199,7 @@ void QQnxWindow::setGeometry(const QRect &rect)
// could result in re-entering QQnxWindow::setGeometry() again.
QWindowSystemInterface::setSynchronousWindowsSystemEvents(true);
QWindowSystemInterface::handleGeometryChange(window(), rect);
QWindowSystemInterface::handleExposeEvent(window(), rect);
QWindowSystemInterface::setSynchronousWindowsSystemEvents(false);
// Now move all children.