diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index d653ae7..467dcda 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -563,6 +563,10 @@
     }
 }
 
+bool layer_state_t::hasBufferChanges() const {
+    return (what & layer_state_t::eBufferChanged) || (what & layer_state_t::eCachedBufferChanged);
+}
+
 status_t layer_state_t::matrix22_t::write(Parcel& output) const {
     SAFE_PARCEL(output.writeFloat, dsdx);
     SAFE_PARCEL(output.writeFloat, dtdx);
diff --git a/libs/gui/include/gui/LayerState.h b/libs/gui/include/gui/LayerState.h
index 9274777..11f0961 100644
--- a/libs/gui/include/gui/LayerState.h
+++ b/libs/gui/include/gui/LayerState.h
@@ -127,6 +127,7 @@
     void merge(const layer_state_t& other);
     status_t write(Parcel& output) const;
     status_t read(const Parcel& input);
+    bool hasBufferChanges() const;
 
     struct matrix22_t {
         float dsdx{0};