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      1 /*
      2  * Copyright (C) 2014 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.graphics.Bitmap;
     21 import android.graphics.Canvas;
     22 import android.graphics.Paint;
     23 import android.graphics.PorterDuff;
     24 import android.os.Bundle;
     25 import android.os.Environment;
     26 import android.view.PixelCopy;
     27 import android.view.Surface;
     28 import android.view.SurfaceHolder;
     29 import android.view.SurfaceHolder.Callback;
     30 import android.view.SurfaceView;
     31 import android.view.View;
     32 import android.widget.Button;
     33 import android.widget.FrameLayout;
     34 import android.widget.LinearLayout;
     35 import android.widget.Toast;
     36 
     37 import java.io.FileOutputStream;
     38 
     39 public class HardwareCanvasSurfaceViewActivity extends Activity implements Callback {
     40     private SurfaceView mSurfaceView;
     41     private HardwareCanvasSurfaceViewActivity.RenderingThread mThread;
     42 
     43     @Override
     44     protected void onCreate(Bundle savedInstanceState) {
     45         super.onCreate(savedInstanceState);
     46 
     47         FrameLayout content = new FrameLayout(this);
     48 
     49         mSurfaceView = new SurfaceView(this);
     50         mSurfaceView.getHolder().addCallback(this);
     51 
     52         Button button = new Button(this);
     53         button.setText("Copy bitmap to /sdcard/surfaceview.png");
     54         button.setOnClickListener((View v) -> {
     55             final Bitmap b = Bitmap.createBitmap(
     56                     mSurfaceView.getWidth(), mSurfaceView.getHeight(),
     57                     Bitmap.Config.ARGB_8888);
     58             PixelCopy.request(mSurfaceView, b,
     59                     (int result) -> {
     60                         if (result != PixelCopy.SUCCESS) {
     61                             Toast.makeText(HardwareCanvasSurfaceViewActivity.this,
     62                                     "Failed to copy", Toast.LENGTH_SHORT).show();
     63                             return;
     64                         }
     65                         try {
     66                             try (FileOutputStream out = new FileOutputStream(
     67                                     Environment.getExternalStorageDirectory() + "/surfaceview.png");) {
     68                                 b.compress(Bitmap.CompressFormat.PNG, 100, out);
     69                             }
     70                         } catch (Exception e) {
     71                             // Ignore
     72                         }
     73                     }, mSurfaceView.getHandler());
     74         });
     75 
     76         LinearLayout layout = new LinearLayout(this);
     77         layout.setOrientation(LinearLayout.VERTICAL);
     78         layout.addView(button, LinearLayout.LayoutParams.MATCH_PARENT,
     79                 LinearLayout.LayoutParams.WRAP_CONTENT);
     80         layout.addView(mSurfaceView, LinearLayout.LayoutParams.MATCH_PARENT,
     81                 LinearLayout.LayoutParams.MATCH_PARENT);
     82 
     83         content.addView(layout, new FrameLayout.LayoutParams(
     84                 FrameLayout.LayoutParams.MATCH_PARENT,
     85                 FrameLayout.LayoutParams.MATCH_PARENT));
     86         setContentView(content);
     87     }
     88 
     89     @Override
     90     public void surfaceCreated(SurfaceHolder holder) {
     91         mThread = new RenderingThread(holder.getSurface());
     92         mThread.start();
     93     }
     94 
     95     @Override
     96     public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
     97         mThread.setSize(width, height);
     98     }
     99 
    100     @Override
    101     public void surfaceDestroyed(SurfaceHolder holder) {
    102         if (mThread != null) mThread.stopRendering();
    103     }
    104 
    105     private static class RenderingThread extends Thread {
    106         private final Surface mSurface;
    107         private volatile boolean mRunning = true;
    108         private int mWidth, mHeight;
    109 
    110         public RenderingThread(Surface surface) {
    111             mSurface = surface;
    112         }
    113 
    114         void setSize(int width, int height) {
    115             mWidth = width;
    116             mHeight = height;
    117         }
    118 
    119         @Override
    120         public void run() {
    121             float x = 0.0f;
    122             float y = 0.0f;
    123             float speedX = 5.0f;
    124             float speedY = 3.0f;
    125 
    126             Paint paint = new Paint();
    127             paint.setColor(0xff00ff00);
    128 
    129             while (mRunning && !Thread.interrupted()) {
    130                 final Canvas canvas = mSurface.lockHardwareCanvas();
    131                 try {
    132                     canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR);
    133                     canvas.drawRect(x, y, x + 20.0f, y + 20.0f, paint);
    134                 } finally {
    135                     mSurface.unlockCanvasAndPost(canvas);
    136                 }
    137 
    138                 if (x + 20.0f + speedX >= mWidth || x + speedX <= 0.0f) {
    139                     speedX = -speedX;
    140                 }
    141                 if (y + 20.0f + speedY >= mHeight || y + speedY <= 0.0f) {
    142                     speedY = -speedY;
    143                 }
    144 
    145                 x += speedX;
    146                 y += speedY;
    147 
    148                 try {
    149                     Thread.sleep(15);
    150                 } catch (InterruptedException e) {
    151                     // Interrupted
    152                 }
    153             }
    154         }
    155 
    156         void stopRendering() {
    157             interrupt();
    158             mRunning = false;
    159         }
    160     }
    161 }
    162