LocalDisplayAdapter.java revision 92130f6407dc51c58b3b941d28a6daf4e04b8d62 
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.Handler;
21import android.os.IBinder;
22import android.os.Looper;
23import android.os.SystemProperties;
24import android.util.SparseArray;
25import android.view.Display;
26import android.view.DisplayEventReceiver;
27import android.view.Surface;
28import android.view.Surface.PhysicalDisplayInfo;
29
30import java.io.PrintWriter;
31
32/**
33 * A display adapter for the local displays managed by Surface Flinger.
34 * <p>
35 * Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock.
36 * </p>
37 */
38final class LocalDisplayAdapter extends DisplayAdapter {
39    private static final String TAG = "LocalDisplayAdapter";
40
41    private static final int[] BUILT_IN_DISPLAY_IDS_TO_SCAN = new int[] {
42            Surface.BUILT_IN_DISPLAY_ID_MAIN,
43            Surface.BUILT_IN_DISPLAY_ID_HDMI,
44    };
45
46    private final SparseArray<LocalDisplayDevice> mDevices =
47            new SparseArray<LocalDisplayDevice>();
48    private HotplugDisplayEventReceiver mHotplugReceiver;
49
50    private final PhysicalDisplayInfo mTempPhys = new PhysicalDisplayInfo();
51
52    // Called with SyncRoot lock held.
53    public LocalDisplayAdapter(DisplayManagerService.SyncRoot syncRoot,
54            Context context, Handler handler, Listener listener) {
55        super(syncRoot, context, handler, listener, TAG);
56    }
57
58    @Override
59    public void registerLocked() {
60        super.registerLocked();
61
62        mHotplugReceiver = new HotplugDisplayEventReceiver(getHandler().getLooper());
63        scanDisplaysLocked();
64    }
65
66    private void scanDisplaysLocked() {
67        for (int builtInDisplayId : BUILT_IN_DISPLAY_IDS_TO_SCAN) {
68            IBinder displayToken = Surface.getBuiltInDisplay(builtInDisplayId);
69            if (displayToken != null && Surface.getDisplayInfo(displayToken, mTempPhys)) {
70                LocalDisplayDevice device = mDevices.get(builtInDisplayId);
71                if (device == null) {
72                    // Display was added.
73                    device = new LocalDisplayDevice(displayToken, builtInDisplayId, mTempPhys);
74                    mDevices.put(builtInDisplayId, device);
75                    sendDisplayDeviceEventLocked(device, DISPLAY_DEVICE_EVENT_ADDED);
76                } else if (device.updatePhysicalDisplayInfoLocked(mTempPhys)) {
77                    // Display properties changed.
78                    sendDisplayDeviceEventLocked(device, DISPLAY_DEVICE_EVENT_CHANGED);
79                }
80            } else {
81                LocalDisplayDevice device = mDevices.get(builtInDisplayId);
82                if (device != null) {
83                    // Display was removed.
84                    mDevices.remove(builtInDisplayId);
85                    sendDisplayDeviceEventLocked(device, DISPLAY_DEVICE_EVENT_REMOVED);
86                }
87            }
88        }
89    }
90
91    private final class LocalDisplayDevice extends DisplayDevice {
92        private final int mBuiltInDisplayId;
93        private final PhysicalDisplayInfo mPhys;
94
95        private DisplayDeviceInfo mInfo;
96        private boolean mHavePendingChanges;
97        private boolean mBlanked;
98
99        public LocalDisplayDevice(IBinder displayToken, int builtInDisplayId,
100                PhysicalDisplayInfo phys) {
101            super(LocalDisplayAdapter.this, displayToken);
102            mBuiltInDisplayId = builtInDisplayId;
103            mPhys = new PhysicalDisplayInfo(phys);
104        }
105
106        public boolean updatePhysicalDisplayInfoLocked(PhysicalDisplayInfo phys) {
107            if (!mPhys.equals(phys)) {
108                mPhys.copyFrom(phys);
109                mHavePendingChanges = true;
110                return true;
111            }
112            return false;
113        }
114
115        @Override
116        public void applyPendingDisplayDeviceInfoChangesLocked() {
117            if (mHavePendingChanges) {
118                mInfo = null;
119                mHavePendingChanges = false;
120            }
121        }
122
123        @Override
124        public DisplayDeviceInfo getDisplayDeviceInfoLocked() {
125            if (mInfo == null) {
126                mInfo = new DisplayDeviceInfo();
127                mInfo.width = mPhys.width;
128                mInfo.height = mPhys.height;
129                mInfo.refreshRate = mPhys.refreshRate;
130
131                // Assume that all built-in displays that have secure output (eg. HDCP) also
132                // support compositing from gralloc protected buffers.
133                if (mPhys.secure) {
134                    mInfo.flags = DisplayDeviceInfo.FLAG_SECURE
135                            | DisplayDeviceInfo.FLAG_SUPPORTS_PROTECTED_BUFFERS;
136                }
137
138                if (mBuiltInDisplayId == Surface.BUILT_IN_DISPLAY_ID_MAIN) {
139                    mInfo.name = getContext().getResources().getString(
140                            com.android.internal.R.string.display_manager_built_in_display_name);
141                    mInfo.flags |= DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY
142                            | DisplayDeviceInfo.FLAG_ROTATES_WITH_CONTENT;
143                    mInfo.type = Display.TYPE_BUILT_IN;
144                    mInfo.densityDpi = (int)(mPhys.density * 160 + 0.5f);
145                    mInfo.xDpi = mPhys.xDpi;
146                    mInfo.yDpi = mPhys.yDpi;
147                    mInfo.touch = DisplayDeviceInfo.TOUCH_INTERNAL;
148                } else {
149                    mInfo.type = Display.TYPE_HDMI;
150                    mInfo.name = getContext().getResources().getString(
151                            com.android.internal.R.string.display_manager_hdmi_display_name);
152                    mInfo.touch = DisplayDeviceInfo.TOUCH_EXTERNAL;
153                    mInfo.setAssumedDensityForExternalDisplay(mPhys.width, mPhys.height);
154
155                    // For demonstration purposes, allow rotation of the external display.
156                    // In the future we might allow the user to configure this directly.
157                    if ("portrait".equals(SystemProperties.get("persist.demo.hdmirotation"))) {
158                        mInfo.rotation = Surface.ROTATION_270;
159                    }
160                }
161            }
162            return mInfo;
163        }
164
165        @Override
166        public void blankLocked() {
167            mBlanked = true;
168            Surface.blankDisplay(getDisplayTokenLocked());
169        }
170
171        @Override
172        public void unblankLocked() {
173            mBlanked = false;
174            Surface.unblankDisplay(getDisplayTokenLocked());
175        }
176
177        @Override
178        public void dumpLocked(PrintWriter pw) {
179            super.dumpLocked(pw);
180            pw.println("mBuiltInDisplayId=" + mBuiltInDisplayId);
181            pw.println("mPhys=" + mPhys);
182            pw.println("mBlanked=" + mBlanked);
183        }
184    }
185
186    private final class HotplugDisplayEventReceiver extends DisplayEventReceiver {
187        public HotplugDisplayEventReceiver(Looper looper) {
188            super(looper);
189        }
190
191        @Override
192        public void onHotplug(long timestampNanos, int builtInDisplayId, boolean connected) {
193            synchronized (getSyncRoot()) {
194                scanDisplaysLocked();
195            }
196        }
197    }
198}