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      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
     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 
     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 
     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 
     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
     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