OverlayDisplayAdapter.java revision 037c33eae74bee2774897d969d48947f9abe254f
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 com.android.internal.util.DumpUtils; 20import com.android.internal.util.IndentingPrintWriter; 21 22import android.content.Context; 23import android.database.ContentObserver; 24import android.graphics.SurfaceTexture; 25import android.os.Handler; 26import android.os.IBinder; 27import android.provider.Settings; 28import android.util.DisplayMetrics; 29import android.util.Slog; 30import android.view.Display; 31import android.view.Gravity; 32import android.view.Surface; 33import android.view.SurfaceControl; 34 35import java.io.PrintWriter; 36import java.util.ArrayList; 37import java.util.regex.Matcher; 38import java.util.regex.Pattern; 39 40/** 41 * A display adapter that uses overlay windows to simulate secondary displays 42 * for development purposes. Use Development Settings to enable one or more 43 * overlay displays. 44 * <p> 45 * This object has two different handlers (which may be the same) which must not 46 * get confused. The main handler is used to posting messages to the display manager 47 * service as usual. The UI handler is only used by the {@link OverlayDisplayWindow}. 48 * </p><p> 49 * Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock. 50 * </p> 51 */ 52final class OverlayDisplayAdapter extends DisplayAdapter { 53 static final String TAG = "OverlayDisplayAdapter"; 54 static final boolean DEBUG = false; 55 56 private static final int MIN_WIDTH = 100; 57 private static final int MIN_HEIGHT = 100; 58 private static final int MAX_WIDTH = 4096; 59 private static final int MAX_HEIGHT = 4096; 60 61 private static final Pattern SETTING_PATTERN = 62 Pattern.compile("(\\d+)x(\\d+)/(\\d+)(,[a-z]+)*"); 63 64 private final Handler mUiHandler; 65 private final ArrayList<OverlayDisplayHandle> mOverlays = 66 new ArrayList<OverlayDisplayHandle>(); 67 private String mCurrentOverlaySetting = ""; 68 69 // Called with SyncRoot lock held. 70 public OverlayDisplayAdapter(DisplayManagerService.SyncRoot syncRoot, 71 Context context, Handler handler, Listener listener, Handler uiHandler) { 72 super(syncRoot, context, handler, listener, TAG); 73 mUiHandler = uiHandler; 74 } 75 76 @Override 77 public void dumpLocked(PrintWriter pw) { 78 super.dumpLocked(pw); 79 80 pw.println("mCurrentOverlaySetting=" + mCurrentOverlaySetting); 81 pw.println("mOverlays: size=" + mOverlays.size()); 82 for (OverlayDisplayHandle overlay : mOverlays) { 83 overlay.dumpLocked(pw); 84 } 85 } 86 87 @Override 88 public void registerLocked() { 89 super.registerLocked(); 90 91 getHandler().post(new Runnable() { 92 @Override 93 public void run() { 94 getContext().getContentResolver().registerContentObserver( 95 Settings.Global.getUriFor(Settings.Global.OVERLAY_DISPLAY_DEVICES), 96 true, new ContentObserver(getHandler()) { 97 @Override 98 public void onChange(boolean selfChange) { 99 updateOverlayDisplayDevices(); 100 } 101 }); 102 103 updateOverlayDisplayDevices(); 104 } 105 }); 106 } 107 108 private void updateOverlayDisplayDevices() { 109 synchronized (getSyncRoot()) { 110 updateOverlayDisplayDevicesLocked(); 111 } 112 } 113 114 private void updateOverlayDisplayDevicesLocked() { 115 String value = Settings.Global.getString(getContext().getContentResolver(), 116 Settings.Global.OVERLAY_DISPLAY_DEVICES); 117 if (value == null) { 118 value = ""; 119 } 120 121 if (value.equals(mCurrentOverlaySetting)) { 122 return; 123 } 124 mCurrentOverlaySetting = value; 125 126 if (!mOverlays.isEmpty()) { 127 Slog.i(TAG, "Dismissing all overlay display devices."); 128 for (OverlayDisplayHandle overlay : mOverlays) { 129 overlay.dismissLocked(); 130 } 131 mOverlays.clear(); 132 } 133 134 int count = 0; 135 for (String part : value.split(";")) { 136 Matcher matcher = SETTING_PATTERN.matcher(part); 137 if (matcher.matches()) { 138 if (count >= 4) { 139 Slog.w(TAG, "Too many overlay display devices specified: " + value); 140 break; 141 } 142 try { 143 int width = Integer.parseInt(matcher.group(1), 10); 144 int height = Integer.parseInt(matcher.group(2), 10); 145 int densityDpi = Integer.parseInt(matcher.group(3), 10); 146 String flagString = matcher.group(4); 147 if (width >= MIN_WIDTH && width <= MAX_WIDTH 148 && height >= MIN_HEIGHT && height <= MAX_HEIGHT 149 && densityDpi >= DisplayMetrics.DENSITY_LOW 150 && densityDpi <= DisplayMetrics.DENSITY_XXHIGH) { 151 int number = ++count; 152 String name = getContext().getResources().getString( 153 com.android.internal.R.string.display_manager_overlay_display_name, 154 number); 155 int gravity = chooseOverlayGravity(number); 156 boolean secure = flagString != null && flagString.contains(",secure"); 157 158 Slog.i(TAG, "Showing overlay display device #" + number 159 + ": name=" + name + ", width=" + width + ", height=" + height 160 + ", densityDpi=" + densityDpi + ", secure=" + secure); 161 162 mOverlays.add(new OverlayDisplayHandle(name, 163 width, height, densityDpi, gravity, secure)); 164 continue; 165 } 166 } catch (NumberFormatException ex) { 167 } 168 } else if (part.isEmpty()) { 169 continue; 170 } 171 Slog.w(TAG, "Malformed overlay display devices setting: " + value); 172 } 173 } 174 175 private static int chooseOverlayGravity(int overlayNumber) { 176 switch (overlayNumber) { 177 case 1: 178 return Gravity.TOP | Gravity.LEFT; 179 case 2: 180 return Gravity.BOTTOM | Gravity.RIGHT; 181 case 3: 182 return Gravity.TOP | Gravity.RIGHT; 183 case 4: 184 default: 185 return Gravity.BOTTOM | Gravity.LEFT; 186 } 187 } 188 189 private final class OverlayDisplayDevice extends DisplayDevice { 190 private final String mName; 191 private final int mWidth; 192 private final int mHeight; 193 private final float mRefreshRate; 194 private final int mDensityDpi; 195 private final boolean mSecure; 196 197 private int mState; 198 private SurfaceTexture mSurfaceTexture; 199 private Surface mSurface; 200 private DisplayDeviceInfo mInfo; 201 202 public OverlayDisplayDevice(IBinder displayToken, String name, 203 int width, int height, float refreshRate, 204 int densityDpi, boolean secure, int state, 205 SurfaceTexture surfaceTexture) { 206 super(OverlayDisplayAdapter.this, displayToken); 207 mName = name; 208 mWidth = width; 209 mHeight = height; 210 mRefreshRate = refreshRate; 211 mDensityDpi = densityDpi; 212 mSecure = secure; 213 mState = state; 214 mSurfaceTexture = surfaceTexture; 215 } 216 217 public void destroyLocked() { 218 mSurfaceTexture = null; 219 if (mSurface != null) { 220 mSurface.release(); 221 mSurface = null; 222 } 223 SurfaceControl.destroyDisplay(getDisplayTokenLocked()); 224 } 225 226 @Override 227 public void performTraversalInTransactionLocked() { 228 if (mSurfaceTexture != null) { 229 if (mSurface == null) { 230 mSurface = new Surface(mSurfaceTexture); 231 } 232 setSurfaceInTransactionLocked(mSurface); 233 } 234 } 235 236 public void setStateLocked(int state) { 237 mState = state; 238 mInfo = null; 239 } 240 241 @Override 242 public DisplayDeviceInfo getDisplayDeviceInfoLocked() { 243 if (mInfo == null) { 244 mInfo = new DisplayDeviceInfo(); 245 mInfo.name = mName; 246 mInfo.width = mWidth; 247 mInfo.height = mHeight; 248 mInfo.refreshRate = mRefreshRate; 249 mInfo.densityDpi = mDensityDpi; 250 mInfo.xDpi = mDensityDpi; 251 mInfo.yDpi = mDensityDpi; 252 mInfo.flags = DisplayDeviceInfo.FLAG_PRESENTATION; 253 if (mSecure) { 254 mInfo.flags |= DisplayDeviceInfo.FLAG_SECURE; 255 } 256 mInfo.type = Display.TYPE_OVERLAY; 257 mInfo.touch = DisplayDeviceInfo.TOUCH_NONE; 258 mInfo.state = mState; 259 } 260 return mInfo; 261 } 262 } 263 264 /** 265 * Functions as a handle for overlay display devices which are created and 266 * destroyed asynchronously. 267 * 268 * Guarded by the {@link DisplayManagerService.SyncRoot} lock. 269 */ 270 private final class OverlayDisplayHandle implements OverlayDisplayWindow.Listener { 271 private final String mName; 272 private final int mWidth; 273 private final int mHeight; 274 private final int mDensityDpi; 275 private final int mGravity; 276 private final boolean mSecure; 277 278 private OverlayDisplayWindow mWindow; 279 private OverlayDisplayDevice mDevice; 280 281 public OverlayDisplayHandle(String name, 282 int width, int height, int densityDpi, int gravity, boolean secure) { 283 mName = name; 284 mWidth = width; 285 mHeight = height; 286 mDensityDpi = densityDpi; 287 mGravity = gravity; 288 mSecure = secure; 289 290 mUiHandler.post(mShowRunnable); 291 } 292 293 public void dismissLocked() { 294 mUiHandler.removeCallbacks(mShowRunnable); 295 mUiHandler.post(mDismissRunnable); 296 } 297 298 // Called on the UI thread. 299 @Override 300 public void onWindowCreated(SurfaceTexture surfaceTexture, float refreshRate, int state) { 301 synchronized (getSyncRoot()) { 302 IBinder displayToken = SurfaceControl.createDisplay(mName, mSecure); 303 mDevice = new OverlayDisplayDevice(displayToken, mName, 304 mWidth, mHeight, refreshRate, mDensityDpi, mSecure, 305 state, surfaceTexture); 306 307 sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_ADDED); 308 } 309 } 310 311 // Called on the UI thread. 312 @Override 313 public void onWindowDestroyed() { 314 synchronized (getSyncRoot()) { 315 if (mDevice != null) { 316 mDevice.destroyLocked(); 317 sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_REMOVED); 318 } 319 } 320 } 321 322 // Called on the UI thread. 323 @Override 324 public void onStateChanged(int state) { 325 synchronized (getSyncRoot()) { 326 if (mDevice != null) { 327 mDevice.setStateLocked(state); 328 sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_CHANGED); 329 } 330 } 331 } 332 333 public void dumpLocked(PrintWriter pw) { 334 pw.println(" " + mName + ":"); 335 pw.println(" mWidth=" + mWidth); 336 pw.println(" mHeight=" + mHeight); 337 pw.println(" mDensityDpi=" + mDensityDpi); 338 pw.println(" mGravity=" + mGravity); 339 pw.println(" mSecure=" + mSecure); 340 341 // Try to dump the window state. 342 if (mWindow != null) { 343 final IndentingPrintWriter ipw = new IndentingPrintWriter(pw, " "); 344 ipw.increaseIndent(); 345 DumpUtils.dumpAsync(mUiHandler, mWindow, ipw, 200); 346 } 347 } 348 349 // Runs on the UI thread. 350 private final Runnable mShowRunnable = new Runnable() { 351 @Override 352 public void run() { 353 OverlayDisplayWindow window = new OverlayDisplayWindow(getContext(), 354 mName, mWidth, mHeight, mDensityDpi, mGravity, mSecure, 355 OverlayDisplayHandle.this); 356 window.show(); 357 358 synchronized (getSyncRoot()) { 359 mWindow = window; 360 } 361 } 362 }; 363 364 // Runs on the UI thread. 365 private final Runnable mDismissRunnable = new Runnable() { 366 @Override 367 public void run() { 368 OverlayDisplayWindow window; 369 synchronized (getSyncRoot()) { 370 window = mWindow; 371 mWindow = null; 372 } 373 374 if (window != null) { 375 window.dismiss(); 376 } 377 } 378 }; 379 } 380} 381