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      1 /*
      2  * Copyright (C) 2017 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 android.server.displayservice;
     18 
     19 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY;
     20 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_PRESENTATION;
     21 
     22 import android.app.Notification;
     23 import android.app.NotificationChannel;
     24 import android.app.NotificationManager;
     25 import android.app.Service;
     26 import android.content.Intent;
     27 import android.graphics.PixelFormat;
     28 import android.hardware.display.DisplayManager;
     29 import android.hardware.display.VirtualDisplay;
     30 import android.media.ImageReader;
     31 import android.os.Bundle;
     32 import android.os.IBinder;
     33 import android.util.Log;
     34 import android.view.Surface;
     35 
     36 public class VirtualDisplayService extends Service {
     37     private static final String NOTIFICATION_CHANNEL_ID = "cts/VirtualDisplayService";
     38     private static final String TAG = "VirtualDisplayService";
     39 
     40     private static final int FOREGROUND_ID = 1;
     41 
     42     private static final int DENSITY = 160;
     43     private static final int HEIGHT = 480;
     44     private static final int WIDTH = 800;
     45 
     46     private ImageReader mReader;
     47     private VirtualDisplay mVirtualDisplay;
     48 
     49     @Override
     50     public void onCreate() {
     51         super.onCreate();
     52 
     53         NotificationManager notificationManager = getSystemService(NotificationManager.class);
     54         notificationManager.createNotificationChannel(new NotificationChannel(
     55             NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_ID,
     56             NotificationManager.IMPORTANCE_DEFAULT));
     57         Notification notif = new Notification.Builder(this, NOTIFICATION_CHANNEL_ID)
     58                 .setSmallIcon(android.R.drawable.ic_dialog_alert)
     59                 .build();
     60         startForeground(FOREGROUND_ID, notif);
     61     }
     62 
     63     @Override
     64     public int onStartCommand(Intent intent, int flags, int startId) {
     65         String command = intent.getStringExtra("command");
     66         Log.d(TAG, "Got command: " + command);
     67 
     68         if ("create".equals(command)) {
     69             createVirtualDisplay(intent);
     70         } if ("off".equals(command)) {
     71             mVirtualDisplay.setSurface(null);
     72         } else if ("on".equals(command)) {
     73             mVirtualDisplay.setSurface(mReader.getSurface());
     74         } else if ("destroy".equals(command)) {
     75             destroyVirtualDisplay();
     76             stopSelf();
     77         }
     78 
     79         return START_NOT_STICKY;
     80     }
     81 
     82     @Override
     83     public IBinder onBind(Intent intent) {
     84         return null;
     85     }
     86 
     87     private void createVirtualDisplay(Intent intent) {
     88         mReader = ImageReader.newInstance(WIDTH, HEIGHT, PixelFormat.RGBA_8888, 2);
     89 
     90         final DisplayManager displayManager = getSystemService(DisplayManager.class);
     91         final String name = "CtsVirtualDisplay";
     92 
     93         int flags = VIRTUAL_DISPLAY_FLAG_PRESENTATION | VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY;
     94         if (intent.getBooleanExtra("show_content_when_locked", false /* defaultValue */)) {
     95             flags |= 1 << 5; // VIRTUAL_DISPLAY_FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD
     96         }
     97         mVirtualDisplay = displayManager.createVirtualDisplay(
     98                 name, WIDTH, HEIGHT, DENSITY, mReader.getSurface(), flags);
     99     }
    100 
    101     private void destroyVirtualDisplay() {
    102         mVirtualDisplay.release();
    103         mReader.close();
    104     }
    105 }
    106