diff --git a/libs/gui/Flags.cpp b/libs/gui/Flags.cpp
new file mode 100644
index 0000000..85ee2cd
--- /dev/null
+++ b/libs/gui/Flags.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gui/Flags.h>
+#include <gui/IGraphicBufferProducer.h>
+#include <gui/Surface.h>
+#include <gui/view/Surface.h>
+
+namespace android {
+namespace flagtools {
+sp<SurfaceType> surfaceToSurfaceType(const sp<Surface>& surface) {
+#if WB_LIBCAMERASERVICE_WITH_DEPENDENCIES
+    return surface;
+#else
+    return surface->getIGraphicBufferProducer();
+#endif
+}
+
+sp<IGraphicBufferProducer> surfaceTypeToIGBP(const sp<SurfaceType>& surface) {
+#if WB_LIBCAMERASERVICE_WITH_DEPENDENCIES
+    return surface->getIGraphicBufferProducer();
+#else
+    return surface;
+#endif
+}
+
+bool isSurfaceTypeValid(const sp<SurfaceType>& surface) {
+#if WB_LIBCAMERASERVICE_WITH_DEPENDENCIES
+    return Surface::isValid(surface);
+#else
+    return surface != nullptr;
+#endif
+}
+
+ParcelableSurfaceType toParcelableSurfaceType(const view::Surface& surface) {
+#if WB_LIBCAMERASERVICE_WITH_DEPENDENCIES
+    return surface;
+#else
+    return surface.graphicBufferProducer;
+#endif
+}
+
+ParcelableSurfaceType convertSurfaceTypeToParcelable(sp<SurfaceType> surface) {
+#if WB_LIBCAMERASERVICE_WITH_DEPENDENCIES
+    return view::Surface::fromSurface(surface);
+#else
+    return surface;
+#endif
+}
+
+sp<SurfaceType> convertParcelableSurfaceTypeToSurface(const ParcelableSurfaceType& surface) {
+#if WB_LIBCAMERASERVICE_WITH_DEPENDENCIES
+    return surface.toSurface();
+#else
+    return surface;
+#endif
+}
+
+} // namespace flagtools
+} // namespace android
\ No newline at end of file