LocalDisplayAdapter.java revision d728bf514f257670fcb9aa22c6eaf97626072c93 
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.util.SparseArray;
23import android.view.Surface;
24import android.view.Surface.PhysicalDisplayInfo;
25
26import java.io.PrintWriter;
27
28/**
29 * A display adapter for the local displays managed by Surface Flinger.
30 * <p>
31 * Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock.
32 * </p>
33 */
34final class LocalDisplayAdapter extends DisplayAdapter {
35    private static final String TAG = "LocalDisplayAdapter";
36
37    private static final int[] BUILT_IN_DISPLAY_IDS_TO_SCAN = new int[] {
38            Surface.BUILT_IN_DISPLAY_ID_MAIN,
39            Surface.BUILT_IN_DISPLAY_ID_HDMI,
40    };
41
42    private final SparseArray<LocalDisplayDevice> mDevices =
43            new SparseArray<LocalDisplayDevice>();
44
45    private final PhysicalDisplayInfo mTempPhys = new PhysicalDisplayInfo();
46
47    public LocalDisplayAdapter(DisplayManagerService.SyncRoot syncRoot,
48            Context context, Handler handler, Listener listener) {
49        super(syncRoot, context, handler, listener, TAG);
50    }
51
52    @Override
53    public void registerLocked() {
54        // TODO: listen for notifications from Surface Flinger about
55        // built-in displays being added or removed and rescan as needed.
56        super.registerLocked();
57        scanDisplaysLocked();
58    }
59
60    private void scanDisplaysLocked() {
61        for (int builtInDisplayId : BUILT_IN_DISPLAY_IDS_TO_SCAN) {
62            IBinder displayToken = Surface.getBuiltInDisplay(builtInDisplayId);
63            if (displayToken != null && Surface.getDisplayInfo(displayToken, mTempPhys)) {
64                LocalDisplayDevice device = mDevices.get(builtInDisplayId);
65                if (device == null) {
66                    // Display was added.
67                    device = new LocalDisplayDevice(displayToken, builtInDisplayId, mTempPhys);
68                    mDevices.put(builtInDisplayId, device);
69                    sendDisplayDeviceEventLocked(device, DISPLAY_DEVICE_EVENT_ADDED);
70                } else if (device.updatePhysicalDisplayInfoLocked(mTempPhys)) {
71                    // Display properties changed.
72                    sendDisplayDeviceEventLocked(device, DISPLAY_DEVICE_EVENT_CHANGED);
73                }
74            } else {
75                LocalDisplayDevice device = mDevices.get(builtInDisplayId);
76                if (device != null) {
77                    // Display was removed.
78                    mDevices.remove(builtInDisplayId);
79                    sendDisplayDeviceEventLocked(device, DISPLAY_DEVICE_EVENT_REMOVED);
80                }
81            }
82        }
83    }
84
85    private final class LocalDisplayDevice extends DisplayDevice {
86        private final int mBuiltInDisplayId;
87        private final PhysicalDisplayInfo mPhys;
88
89        private DisplayDeviceInfo mInfo;
90        private boolean mHavePendingChanges;
91
92        public LocalDisplayDevice(IBinder displayToken, int builtInDisplayId,
93                PhysicalDisplayInfo phys) {
94            super(LocalDisplayAdapter.this, displayToken);
95            mBuiltInDisplayId = builtInDisplayId;
96            mPhys = new PhysicalDisplayInfo(phys);
97        }
98
99        public boolean updatePhysicalDisplayInfoLocked(PhysicalDisplayInfo phys) {
100            if (!mPhys.equals(phys)) {
101                mPhys.copyFrom(phys);
102                mHavePendingChanges = true;
103                return true;
104            }
105            return false;
106        }
107
108        @Override
109        public void applyPendingDisplayDeviceInfoChangesLocked() {
110            if (mHavePendingChanges) {
111                mInfo = null;
112                mHavePendingChanges = false;
113            }
114        }
115
116        @Override
117        public DisplayDeviceInfo getDisplayDeviceInfoLocked() {
118            if (mInfo == null) {
119                mInfo = new DisplayDeviceInfo();
120                mInfo.width = mPhys.width;
121                mInfo.height = mPhys.height;
122                mInfo.refreshRate = mPhys.refreshRate;
123                if (mBuiltInDisplayId == Surface.BUILT_IN_DISPLAY_ID_MAIN) {
124                    mInfo.name = getContext().getResources().getString(
125                            com.android.internal.R.string.display_manager_built_in_display_name);
126                    mInfo.flags = DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY
127                            | DisplayDeviceInfo.FLAG_SECURE
128                            | DisplayDeviceInfo.FLAG_SUPPORTS_ROTATION;
129                    mInfo.densityDpi = (int)(mPhys.density * 160 + 0.5f);
130                    mInfo.xDpi = mPhys.xDpi;
131                    mInfo.yDpi = mPhys.yDpi;
132                    mInfo.touch = DisplayDeviceInfo.TOUCH_INTERNAL;
133                } else {
134                    mInfo.name = getContext().getResources().getString(
135                            com.android.internal.R.string.display_manager_hdmi_display_name);
136                    mInfo.flags = DisplayDeviceInfo.FLAG_SECURE;
137                    mInfo.touch = DisplayDeviceInfo.TOUCH_EXTERNAL;
138                    mInfo.setAssumedDensityForExternalDisplay(mPhys.width, mPhys.height);
139                }
140            }
141            return mInfo;
142        }
143
144        @Override
145        public void dumpLocked(PrintWriter pw) {
146            super.dumpLocked(pw);
147            pw.println("mBuiltInDisplayId=" + mBuiltInDisplayId);
148            pw.println("mPhys=" + mPhys);
149        }
150    }
151}
152