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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 /**
     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  */
     35 public 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