Andres Morales | 910beb8 | 2016-02-02 16:19:40 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.view; |
| 18 | |
| 19 | import android.annotation.NonNull; |
| 20 | import android.util.Log; |
| 21 | import android.os.Looper; |
| 22 | import android.os.MessageQueue; |
| 23 | |
| 24 | import com.android.internal.util.VirtualRefBasePtr; |
| 25 | |
| 26 | import java.lang.NullPointerException; |
| 27 | import java.lang.ref.WeakReference; |
| 28 | import java.lang.SuppressWarnings; |
| 29 | |
| 30 | /** |
| 31 | * Provides streaming access to frame stats information from the rendering |
| 32 | * subsystem to apps. |
| 33 | * |
| 34 | * @hide |
| 35 | */ |
| 36 | public class FrameMetricsObserver { |
| 37 | private MessageQueue mMessageQueue; |
| 38 | |
| 39 | private WeakReference<Window> mWindow; |
| 40 | |
| 41 | private FrameMetrics mFrameMetrics; |
| 42 | |
| 43 | /* package */ Window.FrameMetricsListener mListener; |
| 44 | /* package */ VirtualRefBasePtr mNative; |
| 45 | |
| 46 | /** |
| 47 | * Creates a FrameMetricsObserver |
| 48 | * |
| 49 | * @param looper the looper to use when invoking callbacks |
| 50 | */ |
| 51 | FrameMetricsObserver(@NonNull Window window, @NonNull Looper looper, |
| 52 | @NonNull Window.FrameMetricsListener listener) { |
| 53 | if (looper == null) { |
| 54 | throw new NullPointerException("looper cannot be null"); |
| 55 | } |
| 56 | |
| 57 | mMessageQueue = looper.getQueue(); |
| 58 | if (mMessageQueue == null) { |
| 59 | throw new IllegalStateException("invalid looper, null message queue\n"); |
| 60 | } |
| 61 | |
| 62 | mFrameMetrics = new FrameMetrics(); |
| 63 | mWindow = new WeakReference<>(window); |
| 64 | mListener = listener; |
| 65 | } |
| 66 | |
| 67 | // Called by native on the provided Handler |
| 68 | @SuppressWarnings("unused") |
| 69 | private void notifyDataAvailable(int dropCount) { |
| 70 | final Window window = mWindow.get(); |
| 71 | if (window != null) { |
| 72 | mListener.onMetricsAvailable(window, mFrameMetrics, dropCount); |
| 73 | } |
| 74 | } |
| 75 | } |