LocalDisplayAdapter.java revision bd6e1500aedc5461e832f69e76341bff0e55fa2b 
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
17package com.android.server.display;
18
19import android.content.Context;
20import android.os.IBinder;
21import android.view.Surface;
22import android.view.Surface.PhysicalDisplayInfo;
23
24/**
25 * A display adapter for the local displays managed by Surface Flinger.
26 * <p>
27 * Display adapters are not thread-safe and must only be accessed
28 * on the display manager service's handler thread.
29 * </p>
30 */
31public final class LocalDisplayAdapter extends DisplayAdapter {
32    private static final String TAG = "LocalDisplayAdapter";
33
34    public LocalDisplayAdapter(Context context) {
35        super(context, TAG);
36    }
37
38    @Override
39    protected void onRegister() {
40        // TODO: listen for notifications from Surface Flinger about
41        // built-in displays being added or removed and rescan as needed.
42        IBinder displayToken = Surface.getBuiltInDisplay(Surface.BUILT_IN_DISPLAY_ID_MAIN);
43        sendDisplayDeviceEvent(new LocalDisplayDevice(displayToken, true),
44                DISPLAY_DEVICE_EVENT_ADDED);
45    }
46
47    private final class LocalDisplayDevice extends DisplayDevice {
48        private final boolean mIsDefault;
49
50        public LocalDisplayDevice(IBinder displayToken, boolean isDefault) {
51            super(LocalDisplayAdapter.this, displayToken);
52            mIsDefault = isDefault;
53        }
54
55        @Override
56        public void getInfo(DisplayDeviceInfo outInfo) {
57            PhysicalDisplayInfo phys = new PhysicalDisplayInfo();
58            Surface.getDisplayInfo(getDisplayToken(), phys);
59
60            outInfo.name = getContext().getResources().getString(
61                    com.android.internal.R.string.display_manager_built_in_display_name);
62            outInfo.width = phys.width;
63            outInfo.height = phys.height;
64            outInfo.refreshRate = phys.refreshRate;
65            outInfo.densityDpi = (int)(phys.density * 160 + 0.5f);
66            outInfo.xDpi = phys.xDpi;
67            outInfo.yDpi = phys.yDpi;
68            if (mIsDefault) {
69                outInfo.flags = DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY
70                        | DisplayDeviceInfo.FLAG_SECURE;
71            }
72        }
73    }
74}
75