2 files changed, 13 insertions, 1 deletions
diff --git a/src/plugins/platforms/xcb/qxcbwindow.cpp b/src/plugins/platforms/xcb/qxcbwindow.cpp
index 56c5c4836f..bf882bdf84 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.cpp
+++ b/src/plugins/platforms/xcb/qxcbwindow.cpp
@@ -1122,7 +1122,17 @@ QXcbEGLSurface *QXcbWindow::eglSurface() const
 void QXcbWindow::handleExposeEvent(const xcb_expose_event_t *event)
 {
     QRect rect(event->x, event->y, event->width, event->height);
-    QWindowSystemInterface::handleSynchronousExposeEvent(window(), rect);
+
+    if (m_exposeRegion.isEmpty())
+        m_exposeRegion = rect;
+    else
+        m_exposeRegion |= rect;
+
+    // if count is non-zero there are more expose events pending
+    if (event->count == 0) {
+        QWindowSystemInterface::handleSynchronousExposeEvent(window(), m_exposeRegion);
+        m_exposeRegion = QRegion();
+    }
 }
 
 void QXcbWindow::handleClientMessageEvent(const xcb_client_message_event_t *event)
diff --git a/src/plugins/platforms/xcb/qxcbwindow.h b/src/plugins/platforms/xcb/qxcbwindow.h
index e864c14f0f..e70686cba0 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.h
+++ b/src/plugins/platforms/xcb/qxcbwindow.h
@@ -156,6 +156,8 @@ private:
 #if defined(XCB_USE_EGL)
     mutable QXcbEGLSurface *m_eglSurface;
 #endif
+
+    QRegion m_exposeRegion;
 };
 
 #endif