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 17 package com.android.server.display; 18 19 import com.android.internal.util.DumpUtils; 20 import com.android.internal.util.IndentingPrintWriter; 21 22 import android.content.Context; 23 import android.database.ContentObserver; 24 import android.graphics.SurfaceTexture; 25 import android.os.Handler; 26 import android.os.IBinder; 27 import android.provider.Settings; 28 import android.util.DisplayMetrics; 29 import android.util.Slog; 30 import android.view.Display; 31 import android.view.Gravity; 32 import android.view.Surface; 33 import android.view.SurfaceControl; 34 35 import java.io.PrintWriter; 36 import java.util.ArrayList; 37 import java.util.Arrays; 38 import java.util.List; 39 import java.util.regex.Matcher; 40 import java.util.regex.Pattern; 41 42 /** 43 * A display adapter that uses overlay windows to simulate secondary displays 44 * for development purposes. Use Development Settings to enable one or more 45 * overlay displays. 46 * <p> 47 * This object has two different handlers (which may be the same) which must not 48 * get confused. The main handler is used to posting messages to the display manager 49 * service as usual. The UI handler is only used by the {@link OverlayDisplayWindow}. 50 * </p><p> 51 * Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock. 52 * </p><p> 53 * This adapter is configured via the 54 * {@link android.provider.Settings.Global#OVERLAY_DISPLAY_DEVICES} setting. This setting should be 55 * formatted as follows: 56 * <pre> 57 * [mode1]|[mode2]|...,[flag1],[flag2],... 58 * </pre> 59 * with each mode specified as: 60 * <pre> 61 * [width]x[height]/[densityDpi] 62 * </pre> 63 * Supported flags: 64 * <ul> 65 * <li><pre>secure</pre>: creates a secure display</li> 66 * </ul> 67 * </p> 68 */ 69 final class OverlayDisplayAdapter extends DisplayAdapter { 70 static final String TAG = "OverlayDisplayAdapter"; 71 static final boolean DEBUG = false; 72 73 private static final int MIN_WIDTH = 100; 74 private static final int MIN_HEIGHT = 100; 75 private static final int MAX_WIDTH = 4096; 76 private static final int MAX_HEIGHT = 4096; 77 78 private static final Pattern DISPLAY_PATTERN = 79 Pattern.compile("([^,]+)(,[a-z]+)*"); 80 private static final Pattern MODE_PATTERN = 81 Pattern.compile("(\\d+)x(\\d+)/(\\d+)"); 82 83 // Unique id prefix for overlay displays. 84 private static final String UNIQUE_ID_PREFIX = "overlay:"; 85 86 private final Handler mUiHandler; 87 private final ArrayList<OverlayDisplayHandle> mOverlays = 88 new ArrayList<OverlayDisplayHandle>(); 89 private String mCurrentOverlaySetting = ""; 90 91 // Called with SyncRoot lock held. 92 public OverlayDisplayAdapter(DisplayManagerService.SyncRoot syncRoot, 93 Context context, Handler handler, Listener listener, Handler uiHandler) { 94 super(syncRoot, context, handler, listener, TAG); 95 mUiHandler = uiHandler; 96 } 97 98 @Override 99 public void dumpLocked(PrintWriter pw) { 100 super.dumpLocked(pw); 101 102 pw.println("mCurrentOverlaySetting=" + mCurrentOverlaySetting); 103 pw.println("mOverlays: size=" + mOverlays.size()); 104 for (OverlayDisplayHandle overlay : mOverlays) { 105 overlay.dumpLocked(pw); 106 } 107 } 108 109 @Override 110 public void registerLocked() { 111 super.registerLocked(); 112 113 getHandler().post(new Runnable() { 114 @Override 115 public void run() { 116 getContext().getContentResolver().registerContentObserver( 117 Settings.Global.getUriFor(Settings.Global.OVERLAY_DISPLAY_DEVICES), 118 true, new ContentObserver(getHandler()) { 119 @Override 120 public void onChange(boolean selfChange) { 121 updateOverlayDisplayDevices(); 122 } 123 }); 124 125 updateOverlayDisplayDevices(); 126 } 127 }); 128 } 129 130 private void updateOverlayDisplayDevices() { 131 synchronized (getSyncRoot()) { 132 updateOverlayDisplayDevicesLocked(); 133 } 134 } 135 136 private void updateOverlayDisplayDevicesLocked() { 137 String value = Settings.Global.getString(getContext().getContentResolver(), 138 Settings.Global.OVERLAY_DISPLAY_DEVICES); 139 if (value == null) { 140 value = ""; 141 } 142 143 if (value.equals(mCurrentOverlaySetting)) { 144 return; 145 } 146 mCurrentOverlaySetting = value; 147 148 if (!mOverlays.isEmpty()) { 149 Slog.i(TAG, "Dismissing all overlay display devices."); 150 for (OverlayDisplayHandle overlay : mOverlays) { 151 overlay.dismissLocked(); 152 } 153 mOverlays.clear(); 154 } 155 156 int count = 0; 157 for (String part : value.split(";")) { 158 Matcher displayMatcher = DISPLAY_PATTERN.matcher(part); 159 if (displayMatcher.matches()) { 160 if (count >= 4) { 161 Slog.w(TAG, "Too many overlay display devices specified: " + value); 162 break; 163 } 164 String modeString = displayMatcher.group(1); 165 String flagString = displayMatcher.group(2); 166 ArrayList<OverlayMode> modes = new ArrayList<>(); 167 for (String mode : modeString.split("\\|")) { 168 Matcher modeMatcher = MODE_PATTERN.matcher(mode); 169 if (modeMatcher.matches()) { 170 try { 171 int width = Integer.parseInt(modeMatcher.group(1), 10); 172 int height = Integer.parseInt(modeMatcher.group(2), 10); 173 int densityDpi = Integer.parseInt(modeMatcher.group(3), 10); 174 if (width >= MIN_WIDTH && width <= MAX_WIDTH 175 && height >= MIN_HEIGHT && height <= MAX_HEIGHT 176 && densityDpi >= DisplayMetrics.DENSITY_LOW 177 && densityDpi <= DisplayMetrics.DENSITY_XXXHIGH) { 178 modes.add(new OverlayMode(width, height, densityDpi)); 179 continue; 180 } else { 181 Slog.w(TAG, "Ignoring out-of-range overlay display mode: " + mode); 182 } 183 } catch (NumberFormatException ex) { 184 } 185 } else if (mode.isEmpty()) { 186 continue; 187 } 188 } 189 if (!modes.isEmpty()) { 190 int number = ++count; 191 String name = getContext().getResources().getString( 192 com.android.internal.R.string.display_manager_overlay_display_name, 193 number); 194 int gravity = chooseOverlayGravity(number); 195 boolean secure = flagString != null && flagString.contains(",secure"); 196 197 Slog.i(TAG, "Showing overlay display device #" + number 198 + ": name=" + name + ", modes=" + Arrays.toString(modes.toArray())); 199 200 mOverlays.add(new OverlayDisplayHandle(name, modes, gravity, secure, number)); 201 continue; 202 } 203 } 204 Slog.w(TAG, "Malformed overlay display devices setting: " + value); 205 } 206 } 207 208 private static int chooseOverlayGravity(int overlayNumber) { 209 switch (overlayNumber) { 210 case 1: 211 return Gravity.TOP | Gravity.LEFT; 212 case 2: 213 return Gravity.BOTTOM | Gravity.RIGHT; 214 case 3: 215 return Gravity.TOP | Gravity.RIGHT; 216 case 4: 217 default: 218 return Gravity.BOTTOM | Gravity.LEFT; 219 } 220 } 221 222 private abstract class OverlayDisplayDevice extends DisplayDevice { 223 private final String mName; 224 private final float mRefreshRate; 225 private final long mDisplayPresentationDeadlineNanos; 226 private final boolean mSecure; 227 private final List<OverlayMode> mRawModes; 228 private final Display.Mode[] mModes; 229 private final int mDefaultMode; 230 231 private int mState; 232 private SurfaceTexture mSurfaceTexture; 233 private Surface mSurface; 234 private DisplayDeviceInfo mInfo; 235 private int mActiveMode; 236 237 public OverlayDisplayDevice(IBinder displayToken, String name, 238 List<OverlayMode> modes, int activeMode, int defaultMode, 239 float refreshRate, long presentationDeadlineNanos, 240 boolean secure, int state, 241 SurfaceTexture surfaceTexture, int number) { 242 super(OverlayDisplayAdapter.this, displayToken, UNIQUE_ID_PREFIX + number); 243 mName = name; 244 mRefreshRate = refreshRate; 245 mDisplayPresentationDeadlineNanos = presentationDeadlineNanos; 246 mSecure = secure; 247 mState = state; 248 mSurfaceTexture = surfaceTexture; 249 mRawModes = modes; 250 mModes = new Display.Mode[modes.size()]; 251 for (int i = 0; i < modes.size(); i++) { 252 OverlayMode mode = modes.get(i); 253 mModes[i] = createMode(mode.mWidth, mode.mHeight, refreshRate); 254 } 255 mActiveMode = activeMode; 256 mDefaultMode = defaultMode; 257 } 258 259 public void destroyLocked() { 260 mSurfaceTexture = null; 261 if (mSurface != null) { 262 mSurface.release(); 263 mSurface = null; 264 } 265 SurfaceControl.destroyDisplay(getDisplayTokenLocked()); 266 } 267 268 @Override 269 public boolean hasStableUniqueId() { 270 return false; 271 } 272 273 @Override 274 public void performTraversalInTransactionLocked() { 275 if (mSurfaceTexture != null) { 276 if (mSurface == null) { 277 mSurface = new Surface(mSurfaceTexture); 278 } 279 setSurfaceInTransactionLocked(mSurface); 280 } 281 } 282 283 public void setStateLocked(int state) { 284 mState = state; 285 mInfo = null; 286 } 287 288 @Override 289 public DisplayDeviceInfo getDisplayDeviceInfoLocked() { 290 if (mInfo == null) { 291 Display.Mode mode = mModes[mActiveMode]; 292 OverlayMode rawMode = mRawModes.get(mActiveMode); 293 mInfo = new DisplayDeviceInfo(); 294 mInfo.name = mName; 295 mInfo.uniqueId = getUniqueId(); 296 mInfo.width = mode.getPhysicalWidth(); 297 mInfo.height = mode.getPhysicalHeight(); 298 mInfo.modeId = mode.getModeId(); 299 mInfo.defaultModeId = mModes[0].getModeId(); 300 mInfo.supportedModes = mModes; 301 mInfo.densityDpi = rawMode.mDensityDpi; 302 mInfo.xDpi = rawMode.mDensityDpi; 303 mInfo.yDpi = rawMode.mDensityDpi; 304 mInfo.presentationDeadlineNanos = mDisplayPresentationDeadlineNanos + 305 1000000000L / (int) mRefreshRate; // display's deadline + 1 frame 306 mInfo.flags = DisplayDeviceInfo.FLAG_PRESENTATION; 307 if (mSecure) { 308 mInfo.flags |= DisplayDeviceInfo.FLAG_SECURE; 309 } 310 mInfo.type = Display.TYPE_OVERLAY; 311 mInfo.touch = DisplayDeviceInfo.TOUCH_NONE; 312 mInfo.state = mState; 313 } 314 return mInfo; 315 } 316 317 @Override 318 public void requestDisplayModesInTransactionLocked(int color, int id) { 319 int index = -1; 320 if (id == 0) { 321 // Use the default. 322 index = 0; 323 } else { 324 for (int i = 0; i < mModes.length; i++) { 325 if (mModes[i].getModeId() == id) { 326 index = i; 327 break; 328 } 329 } 330 } 331 if (index == -1) { 332 Slog.w(TAG, "Unable to locate mode " + id + ", reverting to default."); 333 index = mDefaultMode; 334 } 335 if (mActiveMode == index) { 336 return; 337 } 338 mActiveMode = index; 339 mInfo = null; 340 sendDisplayDeviceEventLocked(this, DISPLAY_DEVICE_EVENT_CHANGED); 341 onModeChangedLocked(index); 342 } 343 344 /** 345 * Called when the device switched to a new mode. 346 * 347 * @param index index of the mode in the list of modes 348 */ 349 public abstract void onModeChangedLocked(int index); 350 } 351 352 /** 353 * Functions as a handle for overlay display devices which are created and 354 * destroyed asynchronously. 355 * 356 * Guarded by the {@link DisplayManagerService.SyncRoot} lock. 357 */ 358 private final class OverlayDisplayHandle implements OverlayDisplayWindow.Listener { 359 private static final int DEFAULT_MODE_INDEX = 0; 360 361 private final String mName; 362 private final List<OverlayMode> mModes; 363 private final int mGravity; 364 private final boolean mSecure; 365 private final int mNumber; 366 367 private OverlayDisplayWindow mWindow; 368 private OverlayDisplayDevice mDevice; 369 private int mActiveMode; 370 371 public OverlayDisplayHandle(String name, List<OverlayMode> modes, int gravity, 372 boolean secure, int number) { 373 mName = name; 374 mModes = modes; 375 mGravity = gravity; 376 mSecure = secure; 377 mNumber = number; 378 379 mActiveMode = 0; 380 381 showLocked(); 382 } 383 384 private void showLocked() { 385 mUiHandler.post(mShowRunnable); 386 } 387 388 public void dismissLocked() { 389 mUiHandler.removeCallbacks(mShowRunnable); 390 mUiHandler.post(mDismissRunnable); 391 } 392 393 private void onActiveModeChangedLocked(int index) { 394 mUiHandler.removeCallbacks(mResizeRunnable); 395 mActiveMode = index; 396 if (mWindow != null) { 397 mUiHandler.post(mResizeRunnable); 398 } 399 } 400 401 // Called on the UI thread. 402 @Override 403 public void onWindowCreated(SurfaceTexture surfaceTexture, float refreshRate, 404 long presentationDeadlineNanos, int state) { 405 synchronized (getSyncRoot()) { 406 IBinder displayToken = SurfaceControl.createDisplay(mName, mSecure); 407 mDevice = new OverlayDisplayDevice(displayToken, mName, mModes, mActiveMode, 408 DEFAULT_MODE_INDEX, refreshRate, presentationDeadlineNanos, 409 mSecure, state, surfaceTexture, mNumber) { 410 @Override 411 public void onModeChangedLocked(int index) { 412 onActiveModeChangedLocked(index); 413 } 414 }; 415 416 sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_ADDED); 417 } 418 } 419 420 // Called on the UI thread. 421 @Override 422 public void onWindowDestroyed() { 423 synchronized (getSyncRoot()) { 424 if (mDevice != null) { 425 mDevice.destroyLocked(); 426 sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_REMOVED); 427 } 428 } 429 } 430 431 // Called on the UI thread. 432 @Override 433 public void onStateChanged(int state) { 434 synchronized (getSyncRoot()) { 435 if (mDevice != null) { 436 mDevice.setStateLocked(state); 437 sendDisplayDeviceEventLocked(mDevice, DISPLAY_DEVICE_EVENT_CHANGED); 438 } 439 } 440 } 441 442 public void dumpLocked(PrintWriter pw) { 443 pw.println(" " + mName + ":"); 444 pw.println(" mModes=" + Arrays.toString(mModes.toArray())); 445 pw.println(" mActiveMode=" + mActiveMode); 446 pw.println(" mGravity=" + mGravity); 447 pw.println(" mSecure=" + mSecure); 448 pw.println(" mNumber=" + mNumber); 449 450 // Try to dump the window state. 451 if (mWindow != null) { 452 final IndentingPrintWriter ipw = new IndentingPrintWriter(pw, " "); 453 ipw.increaseIndent(); 454 DumpUtils.dumpAsync(mUiHandler, mWindow, ipw, "", 200); 455 } 456 } 457 458 // Runs on the UI thread. 459 private final Runnable mShowRunnable = new Runnable() { 460 @Override 461 public void run() { 462 OverlayMode mode = mModes.get(mActiveMode); 463 OverlayDisplayWindow window = new OverlayDisplayWindow(getContext(), 464 mName, mode.mWidth, mode.mHeight, mode.mDensityDpi, mGravity, mSecure, 465 OverlayDisplayHandle.this); 466 window.show(); 467 468 synchronized (getSyncRoot()) { 469 mWindow = window; 470 } 471 } 472 }; 473 474 // Runs on the UI thread. 475 private final Runnable mDismissRunnable = new Runnable() { 476 @Override 477 public void run() { 478 OverlayDisplayWindow window; 479 synchronized (getSyncRoot()) { 480 window = mWindow; 481 mWindow = null; 482 } 483 484 if (window != null) { 485 window.dismiss(); 486 } 487 } 488 }; 489 490 // Runs on the UI thread. 491 private final Runnable mResizeRunnable = new Runnable() { 492 @Override 493 public void run() { 494 OverlayMode mode; 495 OverlayDisplayWindow window; 496 synchronized (getSyncRoot()) { 497 if (mWindow == null) { 498 return; 499 } 500 mode = mModes.get(mActiveMode); 501 window = mWindow; 502 } 503 window.resize(mode.mWidth, mode.mHeight, mode.mDensityDpi); 504 } 505 }; 506 } 507 508 /** 509 * A display mode for an overlay display. 510 */ 511 private static final class OverlayMode { 512 final int mWidth; 513 final int mHeight; 514 final int mDensityDpi; 515 516 OverlayMode(int width, int height, int densityDpi) { 517 mWidth = width; 518 mHeight = height; 519 mDensityDpi = densityDpi; 520 } 521 522 @Override 523 public String toString() { 524 return new StringBuilder("{") 525 .append("width=").append(mWidth) 526 .append(", height=").append(mHeight) 527 .append(", densityDpi=").append(mDensityDpi) 528 .append("}") 529 .toString(); 530 } 531 } 532 } 533
