Merge remote-tracking branch 'origin/5.15' into dev

Change-Id: Ie2b6b40e3ad1e753f051a12c0296206cc884352b

3 files changed, 35 insertions, 36 deletions

diff --git a/src/client/qwaylandintegration.cpp b/src/client/qwaylandintegration.cpp
index 311084b12..b5535cabf 100644
--- a/src/client/qwaylandintegration.cpp
+++ b/src/client/qwaylandintegration.cpp
@@ -240,13 +240,6 @@ QVariant QWaylandIntegration::styleHint(StyleHint hint) const
     if (hint == ShowIsFullScreen && mDisplay->windowManagerIntegration())
         return mDisplay->windowManagerIntegration()->showIsFullScreen();
 
-    switch (hint) {
-    case QPlatformIntegration::FontSmoothingGamma:
-        return qreal(1.0);
-    default:
-        break;
-    }
-
     return QPlatformIntegration::styleHint(hint);
 }
 
diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index e342c0420..7a186b326 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -79,6 +79,13 @@ QWaylandWindow::QWaylandWindow(QWindow *window, QWaylandDisplay *display)
     , mFrameQueue(mDisplay->createEventQueue())
     , mResizeAfterSwap(qEnvironmentVariableIsSet("QT_WAYLAND_RESIZE_AFTER_SWAP"))
 {
+    {
+        bool ok;
+        int frameCallbackTimeout = qEnvironmentVariableIntValue("QT_WAYLAND_FRAME_CALLBACK_TIMEOUT", &ok);
+        if (ok)
+            mFrameCallbackTimeout = frameCallbackTimeout;
+    }
+
     static WId id = 1;
     mWindowId = id++;
     initializeWlSurface();
@@ -236,6 +243,8 @@ void QWaylandWindow::reset()
     mShellSurface = nullptr;
     delete mSubSurfaceWindow;
     mSubSurfaceWindow = nullptr;
+
+    invalidateSurface();
     if (mSurface) {
         emit wlSurfaceDestroyed();
         QWriteLocker lock(&mSurfaceLock);
@@ -247,10 +256,7 @@ void QWaylandWindow::reset()
         mFrameCallback = nullptr;
     }
 
-    int timerId  = mFrameCallbackTimerId.fetchAndStoreOrdered(-1);
-    if (timerId != -1) {
-        killTimer(timerId);
-    }
+    mFrameCallbackElapsedTimer.invalidate();
     mWaitingForFrameCallback = false;
     mFrameCallbackTimedOut = false;
 
@@ -592,15 +598,11 @@ const wl_callback_listener QWaylandWindow::callbackListener = {
 
 void QWaylandWindow::handleFrameCallback()
 {
-    // Stop the timer and stop waiting immediately
-    int timerId = mFrameCallbackTimerId.fetchAndStoreOrdered(-1);
     mWaitingForFrameCallback = false;
+    mFrameCallbackElapsedTimer.invalidate();
 
     // The rest can wait until we can run it on the correct thread
-    auto doHandleExpose = [this, timerId]() {
-        if (timerId != -1)
-            killTimer(timerId);
-
+    auto doHandleExpose = [this]() {
         bool wasExposed = isExposed();
         mFrameCallbackTimedOut = false;
         if (!wasExposed && isExposed()) // Did setting mFrameCallbackTimedOut make the window exposed?
@@ -635,13 +637,6 @@ bool QWaylandWindow::waitForFrameSync(int timeout)
         sendExposeEvent(QRect());
     }
 
-    // Stop current frame timer if any, can't use killTimer directly, because we might be on a diffent thread
-    // Ordered semantics is needed to avoid stopping the timer twice and not miss it when it's
-    // started by other writes
-    int fcbId = mFrameCallbackTimerId.fetchAndStoreOrdered(-1);
-    if (fcbId != -1)
-        QMetaObject::invokeMethod(this, [this, fcbId] { killTimer(fcbId); }, Qt::QueuedConnection);
-
     return !mWaitingForFrameCallback;
 }
 
@@ -1097,8 +1092,16 @@ QVariant QWaylandWindow::property(const QString &name, const QVariant &defaultVa
 
 void QWaylandWindow::timerEvent(QTimerEvent *event)
 {
-    if (mFrameCallbackTimerId.testAndSetOrdered(event->timerId(), -1)) {
-        killTimer(event->timerId());
+    if (event->timerId() != mFrameCallbackCheckIntervalTimerId)
+        return;
+
+    bool callbackTimerExpired = mFrameCallbackElapsedTimer.hasExpired(mFrameCallbackTimeout);
+    if (!mFrameCallbackElapsedTimer.isValid() || callbackTimerExpired ) {
+        killTimer(mFrameCallbackCheckIntervalTimerId);
+        mFrameCallbackCheckIntervalTimerId = -1;
+    }
+    if (mFrameCallbackElapsedTimer.isValid() && callbackTimerExpired) {
+        mFrameCallbackElapsedTimer.invalidate();
         qCDebug(lcWaylandBackingstore) << "Didn't receive frame callback in time, window should now be inexposed";
         mFrameCallbackTimedOut = true;
         mWaitingForUpdate = false;
@@ -1152,16 +1155,16 @@ void QWaylandWindow::handleUpdate()
     mWaitingForFrameCallback = true;
     mWaitingForUpdate = false;
 
-    // Stop current frame timer if any, can't use killTimer directly, see comment above.
-    int fcbId = mFrameCallbackTimerId.fetchAndStoreOrdered(-1);
-    if (fcbId != -1)
-        QMetaObject::invokeMethod(this, [this, fcbId] { killTimer(fcbId); }, Qt::QueuedConnection);
-
     // Start a timer for handling the case when the compositor stops sending frame callbacks.
-    QMetaObject::invokeMethod(this, [this] { // Again; can't do it directly
-        if (mWaitingForFrameCallback)
-            mFrameCallbackTimerId = startTimer(100);
-    }, Qt::QueuedConnection);
+    if (mFrameCallbackTimeout > 0) {
+        QMetaObject::invokeMethod(this, [this] {
+            if (mWaitingForFrameCallback) {
+                if (mFrameCallbackCheckIntervalTimerId < 0)
+                    mFrameCallbackCheckIntervalTimerId = startTimer(mFrameCallbackTimeout);
+                mFrameCallbackElapsedTimer.start();
+            }
+        }, Qt::QueuedConnection);
+    }
 }
 
 void QWaylandWindow::deliverUpdateRequest()
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index a72e5fd9a..be06e435f 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -58,6 +58,7 @@
 #include <QtGui/QIcon>
 #include <QtCore/QVariant>
 #include <QtCore/QLoggingCategory>
+#include <QtCore/QElapsedTimer>
 
 #include <qpa/qplatformwindow.h>
 
@@ -225,7 +226,8 @@ protected:
     WId mWindowId;
     bool mWaitingForFrameCallback = false;
     bool mFrameCallbackTimedOut = false; // Whether the frame callback has timed out
-    QAtomicInt mFrameCallbackTimerId = -1; // Started on commit, reset on frame callback
+    int mFrameCallbackCheckIntervalTimerId = -1;
+    QElapsedTimer mFrameCallbackElapsedTimer;
     struct ::wl_callback *mFrameCallback = nullptr;
     struct ::wl_event_queue *mFrameQueue = nullptr;
     QWaitCondition mFrameSyncWait;
@@ -238,6 +240,7 @@ protected:
     bool mCanResize = true;
     bool mResizeDirty = false;
     bool mResizeAfterSwap;
+    int mFrameCallbackTimeout = 100;
     QVariantMap m_properties;
 
     bool mSentInitialResize = false;