Client: Don't spam expose events

Only send expose event when the geometry actually changed.

Change-Id: Ic06986ce5d11e0ff7a842303f57093b8ff25b9f6
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
Reviewed-by: David Edmundson <davidedmundson@kde.org>

2 files changed, 5 insertions, 1 deletions

diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index 1801c2a4b..4ac2ca51e 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -338,7 +338,9 @@ void QWaylandWindow::setGeometry(const QRect &rect)
 
         mSentInitialResize = true;
     }
-    sendExposeEvent(QRect(QPoint(), geometry().size()));
+    QRect exposeGeometry(QPoint(), geometry().size());
+    if (exposeGeometry != mLastExposeGeometry)
+        sendExposeEvent(exposeGeometry);
 }
 
 void QWaylandWindow::resizeFromApplyConfigure(const QSize &sizeWithMargins, const QPoint &offset)
@@ -356,6 +358,7 @@ void QWaylandWindow::sendExposeEvent(const QRect &rect)
 {
     if (!(mShellSurface && mShellSurface->handleExpose(rect)))
         QWindowSystemInterface::handleExposeEvent(window(), rect);
+    mLastExposeGeometry = rect;
 }
 
 
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index ad24b7358..56ebd3cc6 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -254,6 +254,7 @@ private:
     void handleScreenChanged();
 
     bool mUpdateRequested = false;
+    QRect mLastExposeGeometry;
 
     static const wl_callback_listener callbackListener;
     static void frameCallback(void *data, struct wl_callback *wl_callback, uint32_t time);