diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index e004e95..e392bc5 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -406,6 +406,12 @@
         what |= eMetadataChanged;
         metadata.merge(other.metadata);
     }
+
+    if (other.what & eShadowRadiusChanged) {
+        what |= eShadowRadiusChanged;
+        shadowRadius = other.shadowRadius;
+    }
+
     if ((other.what & what) != other.what) {
         ALOGE("Unmerged SurfaceComposer Transaction properties. LayerState::merge needs updating? "
               "other.what=0x%" PRIu64 " what=0x%" PRIu64,
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index e9079ef..14f47c3 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -1335,6 +1335,18 @@
     return *this;
 }
 
+SurfaceComposerClient::Transaction& SurfaceComposerClient::Transaction::setShadowRadius(
+        const sp<SurfaceControl>& sc, float shadowRadius) {
+    layer_state_t* s = getLayerState(sc);
+    if (!s) {
+        mStatus = BAD_INDEX;
+        return *this;
+    }
+    s->what |= layer_state_t::eShadowRadiusChanged;
+    s->shadowRadius = shadowRadius;
+    return *this;
+}
+
 // ---------------------------------------------------------------------------
 
 DisplayState& SurfaceComposerClient::Transaction::getDisplayState(const sp<IBinder>& token) {
diff --git a/libs/gui/include/gui/LayerState.h b/libs/gui/include/gui/LayerState.h
index a49ed52..c2b5119 100644
--- a/libs/gui/include/gui/LayerState.h
+++ b/libs/gui/include/gui/LayerState.h
@@ -72,7 +72,7 @@
         eCropChanged_legacy = 0x00000100,
         eDeferTransaction_legacy = 0x00000200,
         eOverrideScalingModeChanged = 0x00000400,
-        // AVAILABLE 0x00000800,
+        eShadowRadiusChanged = 0x00000800,
         eReparentChildren = 0x00001000,
         eDetachChildren = 0x00002000,
         eRelativeLayerChanged = 0x00004000,
@@ -126,7 +126,8 @@
             colorTransform(mat4()),
             bgColorAlpha(0),
             bgColorDataspace(ui::Dataspace::UNKNOWN),
-            colorSpaceAgnostic(false) {
+            colorSpaceAgnostic(false),
+            shadowRadius(0.0f) {
         matrix.dsdx = matrix.dtdy = 1.0f;
         matrix.dsdy = matrix.dtdx = 0.0f;
         hdrMetadata.validTypes = 0;
@@ -204,6 +205,9 @@
     bool colorSpaceAgnostic;
 
     std::vector<ListenerCallbacks> listeners;
+
+    // Draws a shadow around the surface.
+    float shadowRadius;
 };
 
 struct ComposerState {
diff --git a/libs/gui/include/gui/SurfaceComposerClient.h b/libs/gui/include/gui/SurfaceComposerClient.h
index 08f4e9e..a140142 100644
--- a/libs/gui/include/gui/SurfaceComposerClient.h
+++ b/libs/gui/include/gui/SurfaceComposerClient.h
@@ -474,6 +474,7 @@
 
         Transaction& setGeometry(const sp<SurfaceControl>& sc,
                 const Rect& source, const Rect& dst, int transform);
+        Transaction& setShadowRadius(const sp<SurfaceControl>& sc, float cornerRadius);
 
         status_t setDisplaySurface(const sp<IBinder>& token,
                 const sp<IGraphicBufferProducer>& bufferProducer);