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      1 /*
      2  * Copyright (C) 2010 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.Bitmap;
     22 import android.graphics.BitmapFactory;
     23 import android.graphics.BitmapShader;
     24 import android.graphics.Canvas;
     25 import android.graphics.Paint;
     26 import android.graphics.Path;
     27 import android.graphics.RectF;
     28 import android.os.Bundle;
     29 import android.view.View;
     30 
     31 @SuppressWarnings({"UnusedDeclaration"})
     32 public class PathsActivity extends Activity {
     33     @Override
     34     protected void onCreate(Bundle savedInstanceState) {
     35         super.onCreate(savedInstanceState);
     36         final PathsView view = new PathsView(this);
     37         setContentView(view);
     38     }
     39 
     40     public static class PathsView extends View {
     41         private final Bitmap mBitmap1;
     42         private final Paint mSmallPaint;
     43         private final Paint mMediumPaint;
     44         private final Paint mLargePaint;
     45         private final BitmapShader mShader;
     46         private final Path mPath;
     47         private final RectF mPathBounds;
     48         private final Paint mBoundsPaint;
     49         private final Bitmap mBitmap;
     50         private final float mOffset;
     51         private final Paint mLinePaint;
     52 
     53         public PathsView(Context c) {
     54             super(c);
     55 
     56             mBitmap1 = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
     57 
     58             mSmallPaint = new Paint();
     59             mSmallPaint.setAntiAlias(true);
     60             mSmallPaint.setColor(0xffff0000);
     61             mSmallPaint.setStrokeWidth(1.0f);
     62             mSmallPaint.setStyle(Paint.Style.STROKE);
     63 
     64             mLinePaint = new Paint();
     65             mLinePaint.setAntiAlias(true);
     66             mLinePaint.setColor(0xffff00ff);
     67             mLinePaint.setStrokeWidth(1.0f);
     68             mLinePaint.setStyle(Paint.Style.STROKE);
     69 
     70             mMediumPaint = new Paint();
     71             mMediumPaint.setAntiAlias(true);
     72             mMediumPaint.setColor(0xe00000ff);
     73             mMediumPaint.setStrokeWidth(10.0f);
     74             mMediumPaint.setStyle(Paint.Style.STROKE);
     75 
     76             mLargePaint = new Paint();
     77             mLargePaint.setAntiAlias(true);
     78             mLargePaint.setColor(0x7f00ff00);
     79             mLargePaint.setStrokeWidth(15.0f);
     80             mLargePaint.setStyle(Paint.Style.FILL);
     81 
     82             mShader = new BitmapShader(mBitmap1, BitmapShader.TileMode.MIRROR,
     83                     BitmapShader.TileMode.MIRROR);
     84 
     85             mPath = new Path();
     86             mPath.moveTo(0.0f, 0.0f);
     87             mPath.cubicTo(0.0f, 0.0f, 100.0f, 150.0f, 100.0f, 200.0f);
     88             mPath.cubicTo(100.0f, 200.0f, 50.0f, 300.0f, -80.0f, 200.0f);
     89             mPath.cubicTo(-80.0f, 200.0f, 100.0f, 200.0f, 200.0f, 0.0f);
     90 
     91             mPathBounds = new RectF();
     92             mPath.computeBounds(mPathBounds, true);
     93 
     94             mBoundsPaint = new Paint();
     95             mBoundsPaint.setColor(0x4000ff00);
     96 
     97             mOffset = mMediumPaint.getStrokeWidth();
     98             final int width = (int) (mPathBounds.width() + mOffset * 3.0f + 0.5f);
     99             final int height = (int) (mPathBounds.height() + mOffset * 3.0f + 0.5f);
    100             mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8);
    101             Canvas canvas = new Canvas(mBitmap);
    102             canvas.translate(-mPathBounds.left + mOffset * 1.5f, -mPathBounds.top + mOffset * 1.5f);
    103             canvas.drawPath(mPath, mMediumPaint);
    104             canvas.setBitmap(null);
    105         }
    106 
    107         @Override
    108         protected void onDraw(Canvas canvas) {
    109             super.onDraw(canvas);
    110 
    111             canvas.drawARGB(255, 255, 255, 255);
    112 
    113             canvas.save();
    114             canvas.translate(200.0f, 60.0f);
    115             canvas.drawPath(mPath, mSmallPaint);
    116 
    117             canvas.translate(350.0f, 0.0f);
    118             canvas.drawPath(mPath, mMediumPaint);
    119 
    120             mLargePaint.setShader(mShader);
    121             canvas.translate(350.0f, 0.0f);
    122             canvas.drawPath(mPath, mLargePaint);
    123             mLargePaint.setShader(null);
    124             canvas.restore();
    125 
    126             canvas.save();
    127             canvas.translate(200.0f, 360.0f);
    128             canvas.drawPath(mPath, mSmallPaint);
    129             canvas.drawRect(mPathBounds, mBoundsPaint);
    130 
    131             canvas.translate(350.0f, 0.0f);
    132             canvas.drawBitmap(mBitmap, mPathBounds.left - mOffset * 1.5f,
    133                     mPathBounds.top - mOffset * 1.5f, null);
    134             canvas.drawRect(mPathBounds, mBoundsPaint);
    135             canvas.drawLine(0.0f, -360.0f, 0.0f, 500.0f, mLinePaint);
    136 
    137             mLargePaint.setShader(mShader);
    138             canvas.translate(350.0f, 0.0f);
    139             canvas.drawPath(mPath, mLargePaint);
    140             canvas.drawRect(mPathBounds, mBoundsPaint);
    141             mLargePaint.setShader(null);
    142             canvas.restore();
    143         }
    144     }
    145 }
    146