AuroraMiddleware/qt5base-lts
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Xcb: fix crash on screen power save

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Handle various cases where we have null QScreen or QPlatformScreen
pointers. With this change, I can run Qt Creator for several days.
Before, it would crash multiple times per day with a two-monitor
setup.

Change-Id: I0923d886ae2a4199ac37edd711ddd4f6f99df93d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@theqtcompany.com>
This commit is contained in:
Paul Olav Tvete 2015-10-23 10:37:49 +02:00
parent a38df3f3ba
commit 7532fb4e61
3 changed files with 14 additions and 4 deletions
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13
src/plugins/platforms/xcb/qxcbbackingstore.cpp
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@ -311,9 +311,12 @@ QPaintDevice *QXcbBackingStore::paintDevice()
void QXcbBackingStore::beginPaint(const QRegion &region)
{
if (!m_image && !m_size.isEmpty())
resize(m_size, QRegion());
if (!m_image)
return;
m_size = QSize();
m_paintRegion = region;
m_image->preparePaint(m_paintRegion);
@ -420,7 +423,8 @@ void QXcbBackingStore::resize(const QSize &size, const QRegion &)
return;
Q_XCB_NOOP(connection());
QXcbScreen *screen = static_cast<QXcbScreen *>(window()->screen()->handle());
QXcbScreen *screen = window()->screen() ? static_cast<QXcbScreen *>(window()->screen()->handle()) : 0;
QPlatformWindow *pw = window()->handle();
if (!pw) {
window()->create();
@ -429,6 +433,11 @@ void QXcbBackingStore::resize(const QSize &size, const QRegion &)
QXcbWindow* win = static_cast<QXcbWindow *>(pw);
delete m_image;
if (!screen) {
m_image = 0;
m_size = size;
return;
}
m_image = new QXcbShmImage(screen, size, win->depth(), win->imageFormat());
// Slow path for bgr888 VNC: Create an additional image, paint into that and
// swap R and B while copying to m_image after each paint.

1
src/plugins/platforms/xcb/qxcbbackingstore.h
View File

@ -71,6 +71,7 @@ private:
QXcbShmImage *m_image;
QRegion m_paintRegion;
QImage m_rgbImage;
QSize m_size;
};
QT_END_NAMESPACE

4
src/plugins/platforms/xcb/qxcbwindow.cpp
View File

@ -652,7 +652,7 @@ void QXcbWindow::setGeometry(const QRect &rect)
m_xcbScreen = newScreen;
const QRect wmGeometry = windowToWmGeometry(rect);
if (newScreen != currentScreen)
if (newScreen && newScreen != currentScreen)
QWindowSystemInterface::handleWindowScreenChanged(window(), newScreen->QPlatformScreen::screen());
if (qt_window_private(window())->positionAutomatic) {
@ -1606,7 +1606,7 @@ void QXcbWindow::requestActivateWindow()
return;
}
if (!m_mapped) {
if (!m_mapped || !xcbScreen()) {
m_deferredActivation = true;
return;
}