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 com.android.internal.view; 18 19 import android.util.EventLog; 20 import android.view.SurfaceHolder; 21 22 public class SurfaceCallbackHelper { 23 private static final int LOGTAG_SURFACEVIEW_CALLBACK = 60006; 24 private final String mTag; 25 private boolean mSurfaceRedrawImplemented; 26 Runnable mRunnable; 27 28 int mFinishDrawingCollected = 0; 29 int mFinishDrawingExpected = 0; 30 31 private Runnable mFinishDrawingRunnable = new Runnable() { 32 @Override 33 public void run() { 34 synchronized (SurfaceCallbackHelper.this) { 35 mFinishDrawingCollected++; 36 if (mFinishDrawingCollected < mFinishDrawingExpected) { 37 return; 38 } 39 mRunnable.run(); 40 if (mSurfaceRedrawImplemented && mTag != null) { 41 EventLog.writeEvent(LOGTAG_SURFACEVIEW_CALLBACK, mTag, 42 "surfaceRedrawNeeded implemented"); 43 } 44 } 45 } 46 }; 47 SurfaceCallbackHelper(Runnable callbacksCollected)48 public SurfaceCallbackHelper(Runnable callbacksCollected) { 49 // skip logging surfaceRedrawNeeded calls 50 this(callbacksCollected, null); 51 } 52 SurfaceCallbackHelper(Runnable callbacksCollected, String tag)53 public SurfaceCallbackHelper(Runnable callbacksCollected, String tag) { 54 mRunnable = callbacksCollected; 55 mTag = tag; 56 mSurfaceRedrawImplemented = false; 57 } 58 dispatchSurfaceRedrawNeededAsync(SurfaceHolder holder, SurfaceHolder.Callback callbacks[])59 public void dispatchSurfaceRedrawNeededAsync(SurfaceHolder holder, SurfaceHolder.Callback callbacks[]) { 60 if (callbacks == null || callbacks.length == 0) { 61 mRunnable.run(); 62 return; 63 } 64 65 synchronized (this) { 66 mFinishDrawingExpected = callbacks.length; 67 mFinishDrawingCollected = 0; 68 } 69 70 for (SurfaceHolder.Callback c : callbacks) { 71 if (c instanceof SurfaceHolder.Callback2) { 72 ((SurfaceHolder.Callback2) c).surfaceRedrawNeededAsync( 73 holder, mFinishDrawingRunnable); 74 mSurfaceRedrawImplemented = true; 75 } else { 76 mFinishDrawingRunnable.run(); 77 } 78 } 79 } 80 }