1 /*
2  * Copyright (C) 2012 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.test.hwui;
18 
19 import android.app.Activity;
20 import android.content.Context;
21 import android.graphics.Canvas;
22 import android.graphics.Paint;
23 import android.graphics.Path;
24 import android.os.Bundle;
25 import android.util.MathUtils;
26 import android.view.View;
27 
28 import java.util.Random;
29 
30 /**
31  * The point of this test is to ensure that we can cause many paths to be created, drawn,
32  * and destroyed without causing hangs or crashes. This tests the native reference counting
33  * scheme in particular, because we should be able to have the Java-level path finalized
34  * without destroying the underlying native path object until we are done referencing it
35  * in pending DisplayLists.
36  */
37 public class PathDestructionActivity extends Activity {
38 
39     private static final int MIN_SIZE = 20;
40     @Override
onCreate(Bundle savedInstanceState)41     protected void onCreate(Bundle savedInstanceState) {
42         super.onCreate(savedInstanceState);
43 
44         MyView view = new MyView(this);
45         setContentView(view);
46     }
47 
48     private static class MyView extends View {
49         Paint strokePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
50         Paint fillPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
51         Paint fillAndStrokePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
52 
MyView(Context context)53         private MyView(Context context) {
54             super(context);
55             strokePaint.setStyle(Paint.Style.STROKE);
56             fillPaint.setStyle(Paint.Style.FILL);
57             fillAndStrokePaint.setStyle(Paint.Style.FILL_AND_STROKE);
58         }
59 
getRandomPath()60         private Path getRandomPath() {
61             float left, top, right, bottom;
62             Random r = new Random();
63             left = r.nextFloat() * (getWidth() - MIN_SIZE);
64             top = r.nextFloat() * (getHeight() - MIN_SIZE);
65             right = left + r.nextFloat() * (getWidth() - left);
66             bottom = top + r.nextFloat() * (getHeight() - top);
67             Path path = new Path();
68             path.moveTo(left, top);
69             path.lineTo(right, top);
70             path.lineTo(right, bottom);
71             path.lineTo(left, bottom);
72             path.close();
73             return path;
74         }
75 
getRandomColor()76         private int getRandomColor() {
77             Random r = new Random();
78             int red = r.nextInt(255);
79             int green = r.nextInt(255);
80             int blue = r.nextInt(255);
81             return 0xff000000 | red << 16 | green << 8 | blue;
82         }
83 
84         @Override
onDraw(Canvas canvas)85         protected void onDraw(Canvas canvas) {
86             Path path;
87             for (int i = 0; i < 15; ++i) {
88                 path = getRandomPath();
89                 strokePaint.setColor(getRandomColor());
90                 canvas.drawPath(path, strokePaint);
91                 path = null;
92                 path = getRandomPath();
93                 fillPaint.setColor(getRandomColor());
94                 canvas.drawPath(path, fillPaint);
95                 path = null;
96                 path = getRandomPath();
97                 fillAndStrokePaint.setColor(getRandomColor());
98                 canvas.drawPath(path, fillAndStrokePaint);
99                 path = null;
100             }
101 
102             invalidate();
103         }
104     }
105 }
106