1 files changed, 20 insertions, 0 deletions
diff --git a/src/widgets/kernel/qwidgetbackingstore_p.h b/src/widgets/kernel/qwidgetbackingstore_p.h
index c6f6541e1f..2fe58fa4a7 100644
--- a/src/widgets/kernel/qwidgetbackingstore_p.h
+++ b/src/widgets/kernel/qwidgetbackingstore_p.h
@@ -61,6 +61,7 @@
 QT_BEGIN_NAMESPACE
 
 class QPlatformTextureList;
+class QWidgetBackingStore;
 
 struct BeginPaintInfo {
     inline BeginPaintInfo() : wasFlushed(0), nothingToPaint(0), backingStoreRecreated(0) {}
@@ -69,6 +70,23 @@ struct BeginPaintInfo {
     uint backingStoreRecreated : 1;
 };
 
+class QPlatformTextureListWatcher : public QObject
+{
+    Q_OBJECT
+
+public:
+    QPlatformTextureListWatcher(QWidgetBackingStore *backingStore);
+    void watch(QPlatformTextureList *textureList);
+    bool isLocked() const { return m_locked; }
+
+private slots:
+     void onLockStatusChanged(bool locked);
+
+private:
+     bool m_locked;
+     QWidgetBackingStore *m_backingStore;
+};
+
 class Q_AUTOTEST_EXPORT QWidgetBackingStore
 {
 public:
@@ -111,6 +129,8 @@ private:
 
     QPoint tlwOffset;
 
+    QPlatformTextureListWatcher *textureListWatcher;
+
     void sendUpdateRequest(QWidget *widget, bool updateImmediately);
 
     static bool flushPaint(QWidget *widget, const QRegion &rgn);