4 files changed, 25 insertions, 0 deletions
diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp
index a8606ff1b6..8e78586697 100644
--- a/src/quick/items/qquickwindow.cpp
+++ b/src/quick/items/qquickwindow.cpp
@@ -4564,6 +4564,20 @@ void QQuickWindow::setSceneGraphBackend(const QString &backend)
 }
 
 /*!
+    Returns the requested Qt Quick scenegraph \a backend.
+
+    \note The return value of this function may still be outdated by
+    subsequent calls to setSceneGraphBackend() until the first QQuickWindow in the
+    application has been constructed.
+
+    \since 5.9
+ */
+QString QQuickWindow::sceneGraphBackend()
+{
+    return QSGContext::backend();
+}
+
+/*!
     Creates a simple rectangle node. When the scenegraph is not initialized, the return value is null.
 
     This is cross-backend alternative to constructing a QSGSimpleRectNode directly.
diff --git a/src/quick/items/qquickwindow.h b/src/quick/items/qquickwindow.h
index 27a73988ae..9c3e7277bc 100644
--- a/src/quick/items/qquickwindow.h
+++ b/src/quick/items/qquickwindow.h
@@ -162,6 +162,7 @@ public:
 
     static void setSceneGraphBackend(QSGRendererInterface::GraphicsApi api);
     static void setSceneGraphBackend(const QString &backend);
+    static QString sceneGraphBackend();
 
     QSGRectangleNode *createRectangleNode() const;
     QSGImageNode *createImageNode() const;
diff --git a/src/quick/scenegraph/qsgcontext_p.h b/src/quick/scenegraph/qsgcontext_p.h
index 2f5d5790ee..1c4cd0ce90 100644
--- a/src/quick/scenegraph/qsgcontext_p.h
+++ b/src/quick/scenegraph/qsgcontext_p.h
@@ -145,6 +145,7 @@ public:
     static QSGRenderLoop *createWindowManager();
 
     static void setBackend(const QString &backend);
+    static QString backend();
 };
 
 class Q_QUICK_PRIVATE_EXPORT QSGRenderContext : public QObject
diff --git a/src/quick/scenegraph/qsgcontextplugin.cpp b/src/quick/scenegraph/qsgcontextplugin.cpp
index 46c2a1dbd9..b8b5141957 100644
--- a/src/quick/scenegraph/qsgcontextplugin.cpp
+++ b/src/quick/scenegraph/qsgcontextplugin.cpp
@@ -232,6 +232,15 @@ void QSGContext::setBackend(const QString &backend)
     backendData->quickWindowBackendRequest = backend;
 }
 
+QString QSGContext::backend()
+{
+    QSGAdaptationBackendData *backendData = qsg_adaptation_data();
+    if (backendData->tried)
+        return backendData->name;
+
+    return backendData->quickWindowBackendRequest;
+}
+
 QT_END_NAMESPACE
 
 #include "moc_qsgcontextplugin_p.cpp"