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
17package com.android.test.hwui;
18
19import android.app.Activity;
20import android.content.Context;
21import android.graphics.Canvas;
22import android.graphics.Paint;
23import android.graphics.Path;
24import android.os.Bundle;
25import android.util.MathUtils;
26import android.view.View;
27
28/**
29 * The point of this test is to ensure that we can cause many paths to be created, drawn,
30 * and destroyed without causing hangs or crashes. This tests the native reference counting
31 * scheme in particular, because we should be able to have the Java-level path finalized
32 * without destroying the underlying native path object until we are done referencing it
33 * in pending DisplayLists.
34 */
35public class PathDestructionActivity extends Activity {
36
37    private static final int MIN_SIZE = 20;
38    @Override
39    protected void onCreate(Bundle savedInstanceState) {
40        super.onCreate(savedInstanceState);
41
42        MyView view = new MyView(this);
43        setContentView(view);
44    }
45
46    private static class MyView extends View {
47        Paint strokePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
48        Paint fillPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
49        Paint fillAndStrokePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
50
51        private MyView(Context context) {
52            super(context);
53            strokePaint.setStyle(Paint.Style.STROKE);
54            fillPaint.setStyle(Paint.Style.FILL);
55            fillAndStrokePaint.setStyle(Paint.Style.FILL_AND_STROKE);
56        }
57
58        private Path getRandomPath() {
59            float left, top, right, bottom;
60            left = MathUtils.random(getWidth() - MIN_SIZE);
61            top = MathUtils.random(getHeight() - MIN_SIZE);
62            right = left + MathUtils.random(getWidth() - left);
63            bottom = top + MathUtils.random(getHeight() - top);
64            Path path = new Path();
65            path.moveTo(left, top);
66            path.lineTo(right, top);
67            path.lineTo(right, bottom);
68            path.lineTo(left, bottom);
69            path.close();
70            return path;
71        }
72
73        private int getRandomColor() {
74            int red = MathUtils.random(255);
75            int green = MathUtils.random(255);
76            int blue = MathUtils.random(255);
77            return 0xff000000 | red << 16 | green << 8 | blue;
78        }
79
80        @Override
81        protected void onDraw(Canvas canvas) {
82            Path path;
83            for (int i = 0; i < 15; ++i) {
84                path = getRandomPath();
85                strokePaint.setColor(getRandomColor());
86                canvas.drawPath(path, strokePaint);
87                path = null;
88                path = getRandomPath();
89                fillPaint.setColor(getRandomColor());
90                canvas.drawPath(path, fillPaint);
91                path = null;
92                path = getRandomPath();
93                fillAndStrokePaint.setColor(getRandomColor());
94                canvas.drawPath(path, fillAndStrokePaint);
95                path = null;
96            }
97
98            invalidate();
99        }
100    }
101}
102