3 files changed, 14 insertions, 1 deletions
diff --git a/src/gui/kernel/qplatformintegration.cpp b/src/gui/kernel/qplatformintegration.cpp
index 3b20d2e7e4..130b479c64 100644
--- a/src/gui/kernel/qplatformintegration.cpp
+++ b/src/gui/kernel/qplatformintegration.cpp
@@ -229,6 +229,11 @@ QPlatformServices *QPlatformIntegration::services() const
     \value ScreenWindowGrabbing The platform supports grabbing window on screen.
     On Wayland, this capability can be reported as \c false. The default implementation
     of hasCapability() returns \c true.
+
+    \value BackingStoreStaticContents The platform backingstore supports static contents.
+    On resize of the backingstore the static contents region is provided, and the backing
+    store is expected to propagate the static content to the resized backing store, without
+    clients needing to repaint the static content region.
  */
 
 /*!
diff --git a/src/gui/kernel/qplatformintegration.h b/src/gui/kernel/qplatformintegration.h
index 71bf23a55c..a18ae821c7 100644
--- a/src/gui/kernel/qplatformintegration.h
+++ b/src/gui/kernel/qplatformintegration.h
@@ -99,7 +99,8 @@ public:
         MaximizeUsingFullscreenGeometry,
         PaintEvents,
         RhiBasedRendering,
-        ScreenWindowGrabbing // whether QScreen::grabWindow() is supported
+        ScreenWindowGrabbing, // whether QScreen::grabWindow() is supported
+        BackingStoreStaticContents
     };
 
     virtual ~QPlatformIntegration() { }
diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp
index 586c19885e..2304ee2256 100644
--- a/src/gui/painting/qbackingstore.cpp
+++ b/src/gui/painting/qbackingstore.cpp
@@ -267,6 +267,13 @@ bool QBackingStore::scroll(const QRegion &area, int dx, int dy)
 */
 void QBackingStore::setStaticContents(const QRegion &region)
 {
+    [[maybe_unused]] static const bool didCheckPlatformSupport = []{
+        const auto *integration = QGuiApplicationPrivate::platformIntegration();
+        if (!integration->hasCapability(QPlatformIntegration::BackingStoreStaticContents))
+            qWarning("QBackingStore::setStaticContents(): Platform does not support static contents");
+        return true;
+    }();
+
     d_ptr->staticContents = region;
 }