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.compatibility.common.util;
18 
19 import static org.junit.Assert.fail;
20 
21 import android.graphics.Bitmap;
22 import android.graphics.Rect;
23 import android.os.Handler;
24 import android.os.HandlerThread;
25 import android.view.PixelCopy;
26 import android.view.Surface;
27 import android.view.Window;
28 import android.view.PixelCopy.OnPixelCopyFinishedListener;
29 import android.view.SurfaceView;
30 
31 public class SynchronousPixelCopy implements OnPixelCopyFinishedListener {
32     private static Handler sHandler;
33     static {
34         HandlerThread thread = new HandlerThread("PixelCopyHelper");
thread.start()35         thread.start();
36         sHandler = new Handler(thread.getLooper());
37     }
38 
39     private int mStatus = -1;
40 
request(Surface source, Bitmap dest)41     public int request(Surface source, Bitmap dest) {
42         synchronized (this) {
43             PixelCopy.request(source, dest, this, sHandler);
44             return getResultLocked();
45         }
46     }
47 
request(Surface source, Rect srcRect, Bitmap dest)48     public int request(Surface source, Rect srcRect, Bitmap dest) {
49         synchronized (this) {
50             PixelCopy.request(source, srcRect, dest, this, sHandler);
51             return getResultLocked();
52         }
53     }
54 
request(SurfaceView source, Bitmap dest)55     public int request(SurfaceView source, Bitmap dest) {
56         synchronized (this) {
57             PixelCopy.request(source, dest, this, sHandler);
58             return getResultLocked();
59         }
60     }
61 
request(SurfaceView source, Rect srcRect, Bitmap dest)62     public int request(SurfaceView source, Rect srcRect, Bitmap dest) {
63         synchronized (this) {
64             PixelCopy.request(source, srcRect, dest, this, sHandler);
65             return getResultLocked();
66         }
67     }
68 
request(Window source, Bitmap dest)69     public int request(Window source, Bitmap dest) {
70         synchronized (this) {
71             PixelCopy.request(source, dest, this, sHandler);
72             return getResultLocked();
73         }
74     }
75 
request(Window source, Rect srcRect, Bitmap dest)76     public int request(Window source, Rect srcRect, Bitmap dest) {
77         synchronized (this) {
78             PixelCopy.request(source, srcRect, dest, this, sHandler);
79             return getResultLocked();
80         }
81     }
82 
getResultLocked()83     private int getResultLocked() {
84         try {
85             this.wait(250);
86         } catch (InterruptedException e) {
87             fail("PixelCopy request didn't complete within 250ms");
88         }
89         return mStatus;
90     }
91 
92     @Override
onPixelCopyFinished(int copyResult)93     public void onPixelCopyFinished(int copyResult) {
94         synchronized (this) {
95             mStatus = copyResult;
96             this.notify();
97         }
98     }
99 }
100