Fix z-order for webview surface control

Set the root surface control transparent, and set the z order of the newly created child surface control to -1.
A new callback is needed to update root surface control in sync from Java side.

Bug: 186750329
Test: use latest APKs from Webview team, play a video, mini toolbar should be visible
Change-Id: I0b37ee8f83fd2b41ff4f2856dbadd31ff6170baf

1 files changed, 26 insertions, 0 deletions

diff --git a/graphics/java/android/graphics/HardwareRenderer.java b/graphics/java/android/graphics/HardwareRenderer.java
index 6aa74cb415f9..e141d5178570 100644
--- a/graphics/java/android/graphics/HardwareRenderer.java
+++ b/graphics/java/android/graphics/HardwareRenderer.java
@@ -762,6 +762,16 @@ public class HardwareRenderer {
         nSetASurfaceTransactionCallback(mNativeProxy, callback);
     }
 
+    private PrepareSurfaceControlForWebviewCallback mAPrepareSurfaceControlForWebviewCallback;
+
+    /** @hide */
+    public void setPrepareSurfaceControlForWebviewCallback(
+            PrepareSurfaceControlForWebviewCallback callback) {
+        // ensure callback is kept alive on the java side since weak ref is used in native code
+        mAPrepareSurfaceControlForWebviewCallback = callback;
+        nSetPrepareSurfaceControlForWebviewCallback(mNativeProxy, callback);
+    }
+
     /** @hide */
     public void setFrameCallback(FrameDrawingCallback callback) {
         nSetFrameCallback(mNativeProxy, callback);
@@ -876,6 +886,19 @@ public class HardwareRenderer {
         session.close();
     }
 
+   /**
+     * Interface used to receive callbacks when Webview requests a surface control.
+     *
+     * @hide
+     */
+    public interface PrepareSurfaceControlForWebviewCallback {
+        /**
+         * Invoked when Webview calls to get a surface control.
+         *
+         */
+        void prepare();
+    }
+
     /**
      * Interface used to receive callbacks when a transaction needs to be merged.
      *
@@ -1374,6 +1397,9 @@ public class HardwareRenderer {
     private static native void nSetASurfaceTransactionCallback(long nativeProxy,
             ASurfaceTransactionCallback callback);
 
+    private static native void nSetPrepareSurfaceControlForWebviewCallback(long nativeProxy,
+            PrepareSurfaceControlForWebviewCallback callback);
+
     private static native void nSetFrameCallback(long nativeProxy, FrameDrawingCallback callback);
 
     private static native void nSetFrameCompleteCallback(long nativeProxy,