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