diff --git a/core/java/android/view/SurfaceControl.java b/core/java/android/view/SurfaceControl.java
index 2c81e89..4977a6e 100644
--- a/core/java/android/view/SurfaceControl.java
+++ b/core/java/android/view/SurfaceControl.java
@@ -2595,6 +2595,16 @@
                 = sRegistry.registerNativeAllocation(this, mNativeObject);
         }
 
+        /**
+         * Create a transaction object that wraps a native peer.
+         * @hide
+         */
+        Transaction(long nativeObject) {
+            mNativeObject = nativeObject;
+            mFreeNativeResources =
+                sRegistry.registerNativeAllocation(this, mNativeObject);
+        }
+
         private Transaction(Parcel in) {
             readFromParcel(in);
         }
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index be8e519..3cfda57 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -1355,6 +1355,16 @@
         }
     }
 
+    private void addASurfaceTransactionCallback() {
+        HardwareRenderer.ASurfaceTransactionCallback callback = (nativeTransactionObj,
+                                                                 nativeSurfaceControlObj,
+                                                                 frameNr) -> {
+            Transaction t = new Transaction(nativeTransactionObj);
+            mergeWithNextTransaction(t, frameNr);
+        };
+        mAttachInfo.mThreadedRenderer.setASurfaceTransactionCallback(callback);
+    }
+
     @UnsupportedAppUsage
     private void enableHardwareAcceleration(WindowManager.LayoutParams attrs) {
         mAttachInfo.mHardwareAccelerated = false;
@@ -1391,6 +1401,7 @@
                 final boolean translucent = attrs.format != PixelFormat.OPAQUE || hasSurfaceInsets;
                 mAttachInfo.mThreadedRenderer = ThreadedRenderer.create(mContext, translucent,
                         attrs.getTitle().toString());
+                addASurfaceTransactionCallback();
                 mAttachInfo.mThreadedRenderer.setSurfaceControl(mSurfaceControl);
                 updateColorModeIfNeeded(attrs.getColorMode());
                 updateForceDarkMode();
diff --git a/graphics/java/android/graphics/HardwareRenderer.java b/graphics/java/android/graphics/HardwareRenderer.java
index f3dba82..8f1223b 100644
--- a/graphics/java/android/graphics/HardwareRenderer.java
+++ b/graphics/java/android/graphics/HardwareRenderer.java
@@ -754,6 +754,11 @@
     }
 
     /** @hide */
+    public void setASurfaceTransactionCallback(ASurfaceTransactionCallback callback) {
+        nSetASurfaceTransactionCallback(mNativeProxy, callback);
+    }
+
+    /** @hide */
     public void setFrameCallback(FrameDrawingCallback callback) {
         nSetFrameCallback(mNativeProxy, callback);
     }
@@ -868,6 +873,23 @@
     }
 
     /**
+     * Interface used to receive callbacks when a transaction needs to be merged.
+     *
+     * @hide
+     */
+    public interface ASurfaceTransactionCallback {
+        /**
+         * Invoked during a frame drawing.
+         *
+         * @param aSurfaceTranactionNativeObj the ASurfaceTransaction native object handle
+         * @param aSurfaceControlNativeObj ASurfaceControl native object handle
+         * @param frame The id of the frame being drawn.
+         */
+        void onMergeTransaction(long aSurfaceTranactionNativeObj,
+                                long aSurfaceControlNativeObj, long frame);
+    }
+
+    /**
      * Interface used to receive callbacks when a frame is being drawn.
      *
      * @hide
@@ -1342,6 +1364,9 @@
     private static native void nSetPictureCaptureCallback(long nativeProxy,
             PictureCapturedCallback callback);
 
+    private static native void nSetASurfaceTransactionCallback(long nativeProxy,
+            ASurfaceTransactionCallback callback);
+
     private static native void nSetFrameCallback(long nativeProxy, FrameDrawingCallback callback);
 
     private static native void nSetFrameCompleteCallback(long nativeProxy,
diff --git a/libs/hwui/WebViewFunctorManager.cpp b/libs/hwui/WebViewFunctorManager.cpp
index 671c66f..979678d 100644
--- a/libs/hwui/WebViewFunctorManager.cpp
+++ b/libs/hwui/WebViewFunctorManager.cpp
@@ -18,6 +18,7 @@
 
 #include <private/hwui/WebViewFunctor.h>
 #include "Properties.h"
+#include "renderthread/CanvasContext.h"
 #include "renderthread/RenderThread.h"
 
 #include <log/log.h>
@@ -115,11 +116,20 @@
     ScopedCurrentFunctor currentFunctor(this);
 
     WebViewOverlayData overlayParams = {
-            // TODO:
             .overlaysMode = OverlaysMode::Disabled,
             .getSurfaceControl = currentFunctor.getSurfaceControl,
             .mergeTransaction = currentFunctor.mergeTransaction,
     };
+
+    if (!drawInfo.isLayer) {
+        renderthread::CanvasContext* activeContext =
+                renderthread::CanvasContext::getActiveContext();
+        if (activeContext != nullptr) {
+            ASurfaceControl* rootSurfaceControl = activeContext->getSurfaceControl();
+            if (rootSurfaceControl) overlayParams.overlaysMode = OverlaysMode::Enabled;
+        }
+    }
+
     mCallbacks.gles.draw(mFunctor, mData, drawInfo, overlayParams);
 }
 
@@ -138,11 +148,12 @@
     ScopedCurrentFunctor currentFunctor(this);
 
     WebViewOverlayData overlayParams = {
-            // TODO
             .overlaysMode = OverlaysMode::Disabled,
             .getSurfaceControl = currentFunctor.getSurfaceControl,
             .mergeTransaction = currentFunctor.mergeTransaction,
     };
+
+    // TODO, enable surface control once offscreen mode figured out
     mCallbacks.vk.draw(mFunctor, mData, params, overlayParams);
 }
 
@@ -166,15 +177,43 @@
 void WebViewFunctor::removeOverlays() {
     ScopedCurrentFunctor currentFunctor(this);
     mCallbacks.removeOverlays(mFunctor, mData, currentFunctor.mergeTransaction);
+    if (mSurfaceControl) {
+        auto funcs = renderthread::RenderThread::getInstance().getASurfaceControlFunctions();
+        funcs.releaseFunc(mSurfaceControl);
+        mSurfaceControl = nullptr;
+    }
 }
 
 ASurfaceControl* WebViewFunctor::getSurfaceControl() {
-    // TODO
-    return nullptr;
+    ATRACE_NAME("WebViewFunctor::getSurfaceControl");
+    if (mSurfaceControl != nullptr) return mSurfaceControl;
+
+    renderthread::CanvasContext* activeContext = renderthread::CanvasContext::getActiveContext();
+    LOG_ALWAYS_FATAL_IF(activeContext == nullptr, "Null active canvas context!");
+
+    ASurfaceControl* rootSurfaceControl = activeContext->getSurfaceControl();
+    LOG_ALWAYS_FATAL_IF(rootSurfaceControl == nullptr, "Null root surface control!");
+
+    auto funcs = renderthread::RenderThread::getInstance().getASurfaceControlFunctions();
+    mSurfaceControl = funcs.createFunc(rootSurfaceControl, "Webview Overlay SurfaceControl");
+    ASurfaceTransaction* transaction = funcs.transactionCreateFunc();
+    funcs.transactionSetVisibilityFunc(transaction, mSurfaceControl,
+                                       ASURFACE_TRANSACTION_VISIBILITY_SHOW);
+    funcs.transactionApplyFunc(transaction);
+    funcs.transactionDeleteFunc(transaction);
+    return mSurfaceControl;
 }
 
 void WebViewFunctor::mergeTransaction(ASurfaceTransaction* transaction) {
-    // TODO
+    ATRACE_NAME("WebViewFunctor::mergeTransaction");
+    if (transaction == nullptr) return;
+    renderthread::CanvasContext* activeContext = renderthread::CanvasContext::getActiveContext();
+    LOG_ALWAYS_FATAL_IF(activeContext == nullptr, "Null active canvas context!");
+    bool done = activeContext->mergeTransaction(transaction, mSurfaceControl);
+    if (!done) {
+        auto funcs = renderthread::RenderThread::getInstance().getASurfaceControlFunctions();
+        funcs.transactionApplyFunc(transaction);
+    }
 }
 
 WebViewFunctorManager& WebViewFunctorManager::instance() {
diff --git a/libs/hwui/WebViewFunctorManager.h b/libs/hwui/WebViewFunctorManager.h
index 17b936a..a84cda5 100644
--- a/libs/hwui/WebViewFunctorManager.h
+++ b/libs/hwui/WebViewFunctorManager.h
@@ -91,6 +91,7 @@
     RenderMode mMode;
     bool mHasContext = false;
     bool mCreatedHandle = false;
+    ASurfaceControl* mSurfaceControl = nullptr;
 };
 
 class WebViewFunctorManager {
diff --git a/libs/hwui/jni/android_graphics_HardwareRenderer.cpp b/libs/hwui/jni/android_graphics_HardwareRenderer.cpp
index d859541..dd78d58 100644
--- a/libs/hwui/jni/android_graphics_HardwareRenderer.cpp
+++ b/libs/hwui/jni/android_graphics_HardwareRenderer.cpp
@@ -64,6 +64,10 @@
 } gHardwareRenderer;
 
 struct {
+    jmethodID onMergeTransaction;
+} gASurfaceTransactionCallback;
+
+struct {
     jmethodID onFrameDraw;
 } gFrameDrawingCallback;
 
@@ -509,6 +513,27 @@
     }
 }
 
+static void android_view_ThreadedRenderer_setASurfaceTransactionCallback(
+        JNIEnv* env, jobject clazz, jlong proxyPtr, jobject aSurfaceTransactionCallback) {
+    RenderProxy* proxy = reinterpret_cast<RenderProxy*>(proxyPtr);
+    if (!aSurfaceTransactionCallback) {
+        proxy->setASurfaceTransactionCallback(nullptr);
+    } else {
+        JavaVM* vm = nullptr;
+        LOG_ALWAYS_FATAL_IF(env->GetJavaVM(&vm) != JNI_OK, "Unable to get Java VM");
+        auto globalCallbackRef = std::make_shared<JGlobalRefHolder>(
+                vm, env->NewGlobalRef(aSurfaceTransactionCallback));
+        proxy->setASurfaceTransactionCallback(
+                [globalCallbackRef](int64_t transObj, int64_t scObj, int64_t frameNr) {
+                    JNIEnv* env = getenv(globalCallbackRef->vm());
+                    env->CallVoidMethod(globalCallbackRef->object(),
+                                        gASurfaceTransactionCallback.onMergeTransaction,
+                                        static_cast<jlong>(transObj), static_cast<jlong>(scObj),
+                                        static_cast<jlong>(frameNr));
+                });
+    }
+}
+
 static void android_view_ThreadedRenderer_setFrameCallback(JNIEnv* env,
         jobject clazz, jlong proxyPtr, jobject frameCallback) {
     RenderProxy* proxy = reinterpret_cast<RenderProxy*>(proxyPtr);
@@ -762,8 +787,7 @@
         {"nSetName", "(JLjava/lang/String;)V", (void*)android_view_ThreadedRenderer_setName},
         {"nSetSurface", "(JLandroid/view/Surface;Z)V",
          (void*)android_view_ThreadedRenderer_setSurface},
-        {"nSetSurfaceControl", "(JJ)V",
-         (void*)android_view_ThreadedRenderer_setSurfaceControl},
+        {"nSetSurfaceControl", "(JJ)V", (void*)android_view_ThreadedRenderer_setSurfaceControl},
         {"nPause", "(J)Z", (void*)android_view_ThreadedRenderer_pause},
         {"nSetStopped", "(JZ)V", (void*)android_view_ThreadedRenderer_setStopped},
         {"nSetLightAlpha", "(JFF)V", (void*)android_view_ThreadedRenderer_setLightAlpha},
@@ -804,6 +828,9 @@
         {"nSetPictureCaptureCallback",
          "(JLandroid/graphics/HardwareRenderer$PictureCapturedCallback;)V",
          (void*)android_view_ThreadedRenderer_setPictureCapturedCallbackJNI},
+        {"nSetASurfaceTransactionCallback",
+         "(JLandroid/graphics/HardwareRenderer$ASurfaceTransactionCallback;)V",
+         (void*)android_view_ThreadedRenderer_setASurfaceTransactionCallback},
         {"nSetFrameCallback", "(JLandroid/graphics/HardwareRenderer$FrameDrawingCallback;)V",
          (void*)android_view_ThreadedRenderer_setFrameCallback},
         {"nSetFrameCompleteCallback",
@@ -866,6 +893,11 @@
             GetStaticMethodIDOrDie(env, hardwareRenderer, "closeHintSession",
                                    "(Landroid/os/PerformanceHintManager$Session;)V");
 
+    jclass aSurfaceTransactionCallbackClass =
+            FindClassOrDie(env, "android/graphics/HardwareRenderer$ASurfaceTransactionCallback");
+    gASurfaceTransactionCallback.onMergeTransaction =
+            GetMethodIDOrDie(env, aSurfaceTransactionCallbackClass, "onMergeTransaction", "(JJJ)V");
+
     jclass frameCallbackClass = FindClassOrDie(env,
             "android/graphics/HardwareRenderer$FrameDrawingCallback");
     gFrameDrawingCallback.onFrameDraw = GetMethodIDOrDie(env, frameCallbackClass,
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index 2482188..bba2207 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -56,6 +56,22 @@
 namespace uirenderer {
 namespace renderthread {
 
+namespace {
+class ScopedActiveContext {
+public:
+    ScopedActiveContext(CanvasContext* context) { sActiveContext = context; }
+
+    ~ScopedActiveContext() { sActiveContext = nullptr; }
+
+    static CanvasContext* getActiveContext() { return sActiveContext; }
+
+private:
+    static CanvasContext* sActiveContext;
+};
+
+CanvasContext* ScopedActiveContext::sActiveContext = nullptr;
+} /* namespace */
+
 CanvasContext* CanvasContext::create(RenderThread& thread, bool translucent,
                                      RenderNode* rootRenderNode, IContextFactory* contextFactory) {
     auto renderType = Properties::getRenderPipelineType();
@@ -473,6 +489,7 @@
         return;
     }
 
+    ScopedActiveContext activeContext(this);
     mCurrentFrameInfo->set(FrameInfoIndex::FrameInterval) =
             mRenderThread.timeLord().frameIntervalNanos();
 
@@ -880,6 +897,17 @@
     return windowDirty;
 }
 
+CanvasContext* CanvasContext::getActiveContext() {
+    return ScopedActiveContext::getActiveContext();
+}
+
+bool CanvasContext::mergeTransaction(ASurfaceTransaction* transaction, ASurfaceControl* control) {
+    if (!mASurfaceTransactionCallback) return false;
+    std::invoke(mASurfaceTransactionCallback, reinterpret_cast<int64_t>(transaction),
+                reinterpret_cast<int64_t>(control), getFrameNumber());
+    return true;
+}
+
 } /* namespace renderthread */
 } /* namespace uirenderer */
 } /* namespace android */
diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index 74f426e..af1ebb2 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -109,6 +109,8 @@
      */
     GrDirectContext* getGrContext() const { return mRenderThread.getGrContext(); }
 
+    ASurfaceControl* getSurfaceControl() const { return mSurfaceControl; }
+
     // Won't take effect until next EGLSurface creation
     void setSwapBehavior(SwapBehavior swapBehavior);
 
@@ -201,6 +203,15 @@
     static void onSurfaceStatsAvailable(void* context, ASurfaceControl* control,
             ASurfaceControlStats* stats);
 
+    void setASurfaceTransactionCallback(
+            const std::function<void(int64_t, int64_t, int64_t)>& callback) {
+        mASurfaceTransactionCallback = callback;
+    }
+
+    bool mergeTransaction(ASurfaceTransaction* transaction, ASurfaceControl* control);
+
+    static CanvasContext* getActiveContext();
+
 private:
     CanvasContext(RenderThread& thread, bool translucent, RenderNode* rootRenderNode,
                   IContextFactory* contextFactory, std::unique_ptr<IRenderPipeline> renderPipeline);
@@ -296,6 +307,8 @@
 
     // If set to true, we expect that callbacks into onSurfaceStatsAvailable
     bool mExpectSurfaceStats = false;
+
+    std::function<void(int64_t, int64_t, int64_t)> mASurfaceTransactionCallback;
 };
 
 } /* namespace renderthread */
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index 9361abd..1b4b4b9 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -295,6 +295,12 @@
             [this, cb = callback]() { mContext->setPictureCapturedCallback(cb); });
 }
 
+void RenderProxy::setASurfaceTransactionCallback(
+        const std::function<void(int64_t, int64_t, int64_t)>& callback) {
+    mRenderThread.queue().post(
+            [this, cb = callback]() { mContext->setASurfaceTransactionCallback(cb); });
+}
+
 void RenderProxy::setFrameCallback(std::function<void(int64_t)>&& callback) {
     mDrawFrameTask.setFrameCallback(std::move(callback));
 }
diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index 8d55d3c..288f555 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -120,6 +120,8 @@
     void drawRenderNode(RenderNode* node);
     void setContentDrawBounds(int left, int top, int right, int bottom);
     void setPictureCapturedCallback(const std::function<void(sk_sp<SkPicture>&&)>& callback);
+    void setASurfaceTransactionCallback(
+            const std::function<void(int64_t, int64_t, int64_t)>& callback);
     void setFrameCallback(std::function<void(int64_t)>&& callback);
     void setFrameCompleteCallback(std::function<void(int64_t)>&& callback);
 
diff --git a/libs/hwui/renderthread/RenderThread.cpp b/libs/hwui/renderthread/RenderThread.cpp
index 682baa6..04aa1cb 100644
--- a/libs/hwui/renderthread/RenderThread.cpp
+++ b/libs/hwui/renderthread/RenderThread.cpp
@@ -54,6 +54,10 @@
 
 ASurfaceControlFunctions::ASurfaceControlFunctions() {
     void* handle_ = dlopen("libandroid.so", RTLD_NOW | RTLD_NODELETE);
+    createFunc = (ASC_create)dlsym(handle_, "ASurfaceControl_create");
+    LOG_ALWAYS_FATAL_IF(createFunc == nullptr,
+                        "Failed to find required symbol ASurfaceControl_create!");
+
     acquireFunc = (ASC_acquire) dlsym(handle_, "ASurfaceControl_acquire");
     LOG_ALWAYS_FATAL_IF(acquireFunc == nullptr,
             "Failed to find required symbol ASurfaceControl_acquire!");
@@ -81,6 +85,23 @@
             "ASurfaceControlStats_getFrameNumber");
     LOG_ALWAYS_FATAL_IF(getFrameNumberFunc == nullptr,
             "Failed to find required symbol ASurfaceControlStats_getFrameNumber!");
+
+    transactionCreateFunc = (AST_create)dlsym(handle_, "ASurfaceTransaction_create");
+    LOG_ALWAYS_FATAL_IF(transactionCreateFunc == nullptr,
+                        "Failed to find required symbol ASurfaceTransaction_create!");
+
+    transactionDeleteFunc = (AST_delete)dlsym(handle_, "ASurfaceTransaction_delete");
+    LOG_ALWAYS_FATAL_IF(transactionDeleteFunc == nullptr,
+                        "Failed to find required symbol ASurfaceTransaction_delete!");
+
+    transactionApplyFunc = (AST_apply)dlsym(handle_, "ASurfaceTransaction_apply");
+    LOG_ALWAYS_FATAL_IF(transactionApplyFunc == nullptr,
+                        "Failed to find required symbol ASurfaceTransaction_apply!");
+
+    transactionSetVisibilityFunc =
+            (AST_setVisibility)dlsym(handle_, "ASurfaceTransaction_setVisibility");
+    LOG_ALWAYS_FATAL_IF(transactionSetVisibilityFunc == nullptr,
+                        "Failed to find required symbol ASurfaceTransaction_setVisibility!");
 }
 
 void RenderThread::frameCallback(int64_t frameTimeNanos, void* data) {
diff --git a/libs/hwui/renderthread/RenderThread.h b/libs/hwui/renderthread/RenderThread.h
index 9e5bce7..cd9b923 100644
--- a/libs/hwui/renderthread/RenderThread.h
+++ b/libs/hwui/renderthread/RenderThread.h
@@ -79,25 +79,39 @@
     virtual ~VsyncSource() {}
 };
 
+typedef ASurfaceControl* (*ASC_create)(ASurfaceControl* parent, const char* debug_name);
 typedef void (*ASC_acquire)(ASurfaceControl* control);
 typedef void (*ASC_release)(ASurfaceControl* control);
 
 typedef void (*ASC_registerSurfaceStatsListener)(ASurfaceControl* control, void* context,
         ASurfaceControl_SurfaceStatsListener func);
 typedef void (*ASC_unregisterSurfaceStatsListener)(void* context,
-                                       ASurfaceControl_SurfaceStatsListener func);
+                                                   ASurfaceControl_SurfaceStatsListener func);
 
 typedef int64_t (*ASCStats_getAcquireTime)(ASurfaceControlStats* stats);
 typedef uint64_t (*ASCStats_getFrameNumber)(ASurfaceControlStats* stats);
 
+typedef ASurfaceTransaction* (*AST_create)();
+typedef void (*AST_delete)(ASurfaceTransaction* transaction);
+typedef void (*AST_apply)(ASurfaceTransaction* transaction);
+typedef void (*AST_setVisibility)(ASurfaceTransaction* transaction,
+                                  ASurfaceControl* surface_control, int8_t visibility);
+
 struct ASurfaceControlFunctions {
     ASurfaceControlFunctions();
+
+    ASC_create createFunc;
     ASC_acquire acquireFunc;
     ASC_release releaseFunc;
     ASC_registerSurfaceStatsListener registerListenerFunc;
     ASC_unregisterSurfaceStatsListener unregisterListenerFunc;
     ASCStats_getAcquireTime getAcquireTimeFunc;
     ASCStats_getFrameNumber getFrameNumberFunc;
+
+    AST_create transactionCreateFunc;
+    AST_delete transactionDeleteFunc;
+    AST_apply transactionApplyFunc;
+    AST_setVisibility transactionSetVisibilityFunc;
 };
 
 class ChoreographerSource;