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.os.RemoteException; 20 import android.view.Surface; 21 import android.view.SurfaceHolder; 22 23 public class SurfaceCallbackHelper { 24 Runnable mRunnable; 25 26 int mFinishDrawingCollected = 0; 27 int mFinishDrawingExpected = 0; 28 29 private Runnable mFinishDrawingRunnable = new Runnable() { 30 @Override 31 public void run() { 32 synchronized (SurfaceCallbackHelper.this) { 33 mFinishDrawingCollected++; 34 if (mFinishDrawingCollected < mFinishDrawingExpected) { 35 return; 36 } 37 mRunnable.run(); 38 } 39 } 40 }; 41 SurfaceCallbackHelper(Runnable callbacksCollected)42 public SurfaceCallbackHelper(Runnable callbacksCollected) { 43 mRunnable = callbacksCollected; 44 } 45 dispatchSurfaceRedrawNeededAsync(SurfaceHolder holder, SurfaceHolder.Callback callbacks[])46 public void dispatchSurfaceRedrawNeededAsync(SurfaceHolder holder, SurfaceHolder.Callback callbacks[]) { 47 if (callbacks == null || callbacks.length == 0) { 48 mRunnable.run(); 49 return; 50 } 51 52 synchronized (this) { 53 mFinishDrawingExpected = callbacks.length; 54 mFinishDrawingCollected = 0; 55 } 56 57 for (SurfaceHolder.Callback c : callbacks) { 58 if (c instanceof SurfaceHolder.Callback2) { 59 ((SurfaceHolder.Callback2) c).surfaceRedrawNeededAsync( 60 holder, mFinishDrawingRunnable); 61 } else { 62 mFinishDrawingRunnable.run(); 63 } 64 } 65 } 66 }