| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view; |
| |
| import android.annotation.NonNull; |
| import android.graphics.HardwareRendererObserver; |
| import android.os.Handler; |
| |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * Provides streaming access to frame stats information from the rendering |
| * subsystem to apps. |
| * |
| * @hide |
| */ |
| public class FrameMetricsObserver |
| implements HardwareRendererObserver.OnFrameMetricsAvailableListener { |
| private final WeakReference<Window> mWindow; |
| private final FrameMetrics mFrameMetrics; |
| private final HardwareRendererObserver mObserver; |
| /*package*/ final Window.OnFrameMetricsAvailableListener mListener; |
| |
| /** |
| * Creates a FrameMetricsObserver |
| * |
| * @param handler the Handler to use when invoking callbacks |
| */ |
| FrameMetricsObserver(@NonNull Window window, @NonNull Handler handler, |
| @NonNull Window.OnFrameMetricsAvailableListener listener) { |
| mWindow = new WeakReference<>(window); |
| mListener = listener; |
| mFrameMetrics = new FrameMetrics(); |
| mObserver = new HardwareRendererObserver(this, mFrameMetrics.mTimingData, handler); |
| } |
| |
| /** |
| * Implementation of OnFrameMetricsAvailableListener |
| * @param dropCountSinceLastInvocation the number of reports dropped since the last time |
| * @Override |
| */ |
| public void onFrameMetricsAvailable(int dropCountSinceLastInvocation) { |
| if (mWindow.get() != null) { |
| mListener.onFrameMetricsAvailable(mWindow.get(), mFrameMetrics, |
| dropCountSinceLastInvocation); |
| } |
| } |
| |
| /*package*/ HardwareRendererObserver getRendererObserver() { |
| return mObserver; |
| } |
| } |