diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 1e33abb..052b519 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -264,6 +264,7 @@
         "DisplayEventDispatcher.cpp",
         "DisplayEventReceiver.cpp",
         "FenceMonitor.cpp",
+        "Flags.cpp",
         "GLConsumer.cpp",
         "IConsumerListener.cpp",
         "IGraphicBufferConsumer.cpp",
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
diff --git a/libs/gui/include/gui/Flags.h b/libs/gui/include/gui/Flags.h
index 34350d2..845bc54 100644
--- a/libs/gui/include/gui/Flags.h
+++ b/libs/gui/include/gui/Flags.h
@@ -17,8 +17,15 @@
 #pragma once
 
 #include <com_android_graphics_libgui_flags.h>
-#include <gui/IGraphicBufferProducer.h>
-#include <gui/Surface.h>
+#include <utils/StrongPointer.h>
+
+namespace android {
+
+class IGraphicBufferProducer;
+class Surface;
+namespace view {
+class Surface;
+}
 
 #define WB_CAMERA3_AND_PROCESSORS_WITH_DEPENDENCIES                  \
     (COM_ANDROID_GRAPHICS_LIBGUI_FLAGS(WB_CAMERA3_AND_PROCESSORS) && \
@@ -31,6 +38,19 @@
 
 #if WB_LIBCAMERASERVICE_WITH_DEPENDENCIES
 typedef android::Surface SurfaceType;
+typedef android::view::Surface ParcelableSurfaceType;
 #else
 typedef android::IGraphicBufferProducer SurfaceType;
-#endif
\ No newline at end of file
+typedef android::sp<android::IGraphicBufferProducer> ParcelableSurfaceType;
+#endif
+
+namespace flagtools {
+sp<SurfaceType> surfaceToSurfaceType(const sp<Surface>& surface);
+ParcelableSurfaceType toParcelableSurfaceType(const view::Surface& surface);
+sp<IGraphicBufferProducer> surfaceTypeToIGBP(const sp<SurfaceType>& surface);
+bool isSurfaceTypeValid(const sp<SurfaceType>& surface);
+ParcelableSurfaceType convertSurfaceTypeToParcelable(sp<SurfaceType> surface);
+sp<SurfaceType> convertParcelableSurfaceTypeToSurface(const ParcelableSurfaceType& surface);
+} // namespace flagtools
+
+} // namespace android
diff --git a/libs/gui/include/gui/view/Surface.h b/libs/gui/include/gui/view/Surface.h
index 7c762d3..bd8704d 100644
--- a/libs/gui/include/gui/view/Surface.h
+++ b/libs/gui/include/gui/view/Surface.h
@@ -54,6 +54,22 @@
     sp<android::Surface> toSurface() const;
 
     status_t getUniqueId(/* out */ uint64_t* id) const;
+
+    bool isEmpty() const;
+
+    bool operator==(const Surface& other) const {
+        return graphicBufferProducer == other.graphicBufferProducer;
+    }
+    bool operator!=(const Surface& other) const { return !(*this == other); }
+    bool operator==(const sp<android::Surface> other) const {
+        if (other == nullptr) return graphicBufferProducer == nullptr;
+        return graphicBufferProducer == other->getIGraphicBufferProducer();
+    }
+    bool operator!=(const sp<android::Surface> other) const { return !(*this == other); }
+    bool operator<(const Surface& other) const {
+        return graphicBufferProducer < other.graphicBufferProducer;
+    }
+    bool operator>(const Surface& other) const { return other < *this; }
 #endif
 
     virtual status_t writeToParcel(Parcel* parcel) const override;
diff --git a/libs/gui/view/Surface.cpp b/libs/gui/view/Surface.cpp
index 9f57923..2cf7081 100644
--- a/libs/gui/view/Surface.cpp
+++ b/libs/gui/view/Surface.cpp
@@ -151,6 +151,10 @@
     }
     return OK;
 }
+
+bool Surface::isEmpty() const {
+    return graphicBufferProducer == nullptr;
+}
 #endif
 
 std::string Surface::toString() const {