Adapt setBackingStore() overrides in QWasmWindow and QEglFSWindow

This is a follow up to a4ca9e80658bca7dad1529f03c1b59173a6ecf62,
adapting the backing store setters to become proper overrides of
the newly implemented QPlatformWindow::setBackingStore();

Pick-to: 6.6
Change-Id: Id4f5ff8650ca4e4d3cab1d71d27041c6129bf4ea
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

2 files changed, 6 insertions, 2 deletions

diff --git a/src/plugins/platforms/eglfs/api/qeglfswindow.cpp b/src/plugins/platforms/eglfs/api/qeglfswindow.cpp
index 1a31f97d7b..6210ef16a8 100644
--- a/src/plugins/platforms/eglfs/api/qeglfswindow.cpp
+++ b/src/plugins/platforms/eglfs/api/qeglfswindow.cpp
@@ -108,8 +108,12 @@ void QEglFSWindow::create()
 #endif
 }
 
-void QEglFSWindow::setBackingStore(QOpenGLCompositorBackingStore *backingStore)
+void QEglFSWindow::setBackingStore(QPlatformBackingStore *store)
 {
+    Q_ASSERT(store);
+    Q_ASSERT_X(dynamic_cast<QOpenGLCompositorBackingStore *>(store), __FUNCTION__,
+               "Argument is not a QOpenGLCompositorBackingStore.");
+    auto *backingStore = static_cast<QOpenGLCompositorBackingStore *>(store);
 #ifndef QT_NO_OPENGL
     if (!m_rasterCompositingContext) {
         m_rasterCompositingContext = new QOpenGLContext;
diff --git a/src/plugins/platforms/eglfs/api/qeglfswindow_p.h b/src/plugins/platforms/eglfs/api/qeglfswindow_p.h
index d111042040..d8e0a4a735 100644
--- a/src/plugins/platforms/eglfs/api/qeglfswindow_p.h
+++ b/src/plugins/platforms/eglfs/api/qeglfswindow_p.h
@@ -71,7 +71,7 @@ public:
 
 #ifndef QT_NO_OPENGL
     QOpenGLCompositorBackingStore *backingStore() { return m_backingStore; }
-    void setBackingStore(QOpenGLCompositorBackingStore *backingStore);
+    void setBackingStore(QPlatformBackingStore *backingStore) override;
     QWindow *sourceWindow() const override;
     const QPlatformTextureList *textures() const override;
     void endCompositing() override;