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 android.graphics.Rect; 20 import android.hardware.display.DisplayManagerInternal; 21 import android.view.Display; 22 import android.view.DisplayInfo; 23 import android.view.Surface; 24 25 import java.io.PrintWriter; 26 import java.util.Arrays; 27 import java.util.List; 28 29 import libcore.util.Objects; 30 31 /** 32 * Describes how a logical display is configured. 33 * <p> 34 * At this time, we only support logical displays that are coupled to a particular 35 * primary display device from which the logical display derives its basic properties 36 * such as its size, density and refresh rate. 37 * </p><p> 38 * A logical display may be mirrored onto multiple display devices in addition to its 39 * primary display device. Note that the contents of a logical display may not 40 * always be visible, even on its primary display device, such as in the case where 41 * the primary display device is currently mirroring content from a different 42 * logical display. 43 * </p><p> 44 * This object is designed to encapsulate as much of the policy of logical 45 * displays as possible. The idea is to make it easy to implement new kinds of 46 * logical displays mostly by making local changes to this class. 47 * </p><p> 48 * Note: The display manager architecture does not actually require logical displays 49 * to be associated with any individual display device. Logical displays and 50 * display devices are orthogonal concepts. Some mapping will exist between 51 * logical displays and display devices but it can be many-to-many and 52 * and some might have no relation at all. 53 * </p><p> 54 * Logical displays are guarded by the {@link DisplayManagerService.SyncRoot} lock. 55 * </p> 56 */ 57 final class LogicalDisplay { 58 private final DisplayInfo mBaseDisplayInfo = new DisplayInfo(); 59 60 // The layer stack we use when the display has been blanked to prevent any 61 // of its content from appearing. 62 private static final int BLANK_LAYER_STACK = -1; 63 64 private final int mDisplayId; 65 private final int mLayerStack; 66 /** 67 * Override information set by the window manager. Will be reported instead of {@link #mInfo} 68 * if not null. 69 * @see #setDisplayInfoOverrideFromWindowManagerLocked(DisplayInfo) 70 * @see #getDisplayInfoLocked() 71 */ 72 private DisplayInfo mOverrideDisplayInfo; 73 /** 74 * Current display info. Initialized with {@link #mBaseDisplayInfo}. Set to {@code null} if 75 * needs to be updated. 76 * @see #getDisplayInfoLocked() 77 */ 78 private DisplayInfo mInfo; 79 80 // The display device that this logical display is based on and which 81 // determines the base metrics that it uses. 82 private DisplayDevice mPrimaryDisplayDevice; 83 private DisplayDeviceInfo mPrimaryDisplayDeviceInfo; 84 85 // True if the logical display has unique content. 86 private boolean mHasContent; 87 88 private int mRequestedModeId; 89 private int mRequestedColorMode; 90 91 // The display offsets to apply to the display projection. 92 private int mDisplayOffsetX; 93 private int mDisplayOffsetY; 94 95 // Temporary rectangle used when needed. 96 private final Rect mTempLayerStackRect = new Rect(); 97 private final Rect mTempDisplayRect = new Rect(); 98 99 public LogicalDisplay(int displayId, int layerStack, DisplayDevice primaryDisplayDevice) { 100 mDisplayId = displayId; 101 mLayerStack = layerStack; 102 mPrimaryDisplayDevice = primaryDisplayDevice; 103 } 104 105 /** 106 * Gets the logical display id of this logical display. 107 * 108 * @return The logical display id. 109 */ 110 public int getDisplayIdLocked() { 111 return mDisplayId; 112 } 113 114 /** 115 * Gets the primary display device associated with this logical display. 116 * 117 * @return The primary display device. 118 */ 119 public DisplayDevice getPrimaryDisplayDeviceLocked() { 120 return mPrimaryDisplayDevice; 121 } 122 123 /** 124 * Gets information about the logical display. 125 * 126 * @return The device info, which should be treated as immutable by the caller. 127 * The logical display should allocate a new display info object whenever 128 * the data changes. 129 */ 130 public DisplayInfo getDisplayInfoLocked() { 131 if (mInfo == null) { 132 mInfo = new DisplayInfo(); 133 mInfo.copyFrom(mBaseDisplayInfo); 134 if (mOverrideDisplayInfo != null) { 135 mInfo.appWidth = mOverrideDisplayInfo.appWidth; 136 mInfo.appHeight = mOverrideDisplayInfo.appHeight; 137 mInfo.smallestNominalAppWidth = mOverrideDisplayInfo.smallestNominalAppWidth; 138 mInfo.smallestNominalAppHeight = mOverrideDisplayInfo.smallestNominalAppHeight; 139 mInfo.largestNominalAppWidth = mOverrideDisplayInfo.largestNominalAppWidth; 140 mInfo.largestNominalAppHeight = mOverrideDisplayInfo.largestNominalAppHeight; 141 mInfo.logicalWidth = mOverrideDisplayInfo.logicalWidth; 142 mInfo.logicalHeight = mOverrideDisplayInfo.logicalHeight; 143 mInfo.overscanLeft = mOverrideDisplayInfo.overscanLeft; 144 mInfo.overscanTop = mOverrideDisplayInfo.overscanTop; 145 mInfo.overscanRight = mOverrideDisplayInfo.overscanRight; 146 mInfo.overscanBottom = mOverrideDisplayInfo.overscanBottom; 147 mInfo.rotation = mOverrideDisplayInfo.rotation; 148 mInfo.logicalDensityDpi = mOverrideDisplayInfo.logicalDensityDpi; 149 mInfo.physicalXDpi = mOverrideDisplayInfo.physicalXDpi; 150 mInfo.physicalYDpi = mOverrideDisplayInfo.physicalYDpi; 151 } 152 } 153 return mInfo; 154 } 155 156 /** 157 * @see DisplayManagerInternal#getNonOverrideDisplayInfo(int, DisplayInfo) 158 */ 159 void getNonOverrideDisplayInfoLocked(DisplayInfo outInfo) { 160 outInfo.copyFrom(mBaseDisplayInfo); 161 } 162 163 /** 164 * Sets overridden logical display information from the window manager. 165 * This method can be used to adjust application insets, rotation, and other 166 * properties that the window manager takes care of. 167 * 168 * @param info The logical display information, may be null. 169 */ 170 public boolean setDisplayInfoOverrideFromWindowManagerLocked(DisplayInfo info) { 171 if (info != null) { 172 if (mOverrideDisplayInfo == null) { 173 mOverrideDisplayInfo = new DisplayInfo(info); 174 mInfo = null; 175 return true; 176 } 177 if (!mOverrideDisplayInfo.equals(info)) { 178 mOverrideDisplayInfo.copyFrom(info); 179 mInfo = null; 180 return true; 181 } 182 } else if (mOverrideDisplayInfo != null) { 183 mOverrideDisplayInfo = null; 184 mInfo = null; 185 return true; 186 } 187 return false; 188 } 189 190 /** 191 * Returns true if the logical display is in a valid state. 192 * This method should be checked after calling {@link #updateLocked} to handle the 193 * case where a logical display should be removed because all of its associated 194 * display devices are gone or if it is otherwise no longer needed. 195 * 196 * @return True if the logical display is still valid. 197 */ 198 public boolean isValidLocked() { 199 return mPrimaryDisplayDevice != null; 200 } 201 202 /** 203 * Updates the state of the logical display based on the available display devices. 204 * The logical display might become invalid if it is attached to a display device 205 * that no longer exists. 206 * 207 * @param devices The list of all connected display devices. 208 */ 209 public void updateLocked(List<DisplayDevice> devices) { 210 // Nothing to update if already invalid. 211 if (mPrimaryDisplayDevice == null) { 212 return; 213 } 214 215 // Check whether logical display has become invalid. 216 if (!devices.contains(mPrimaryDisplayDevice)) { 217 mPrimaryDisplayDevice = null; 218 return; 219 } 220 221 // Bootstrap the logical display using its associated primary physical display. 222 // We might use more elaborate configurations later. It's possible that the 223 // configuration of several physical displays might be used to determine the 224 // logical display that they are sharing. (eg. Adjust size for pixel-perfect 225 // mirroring over HDMI.) 226 DisplayDeviceInfo deviceInfo = mPrimaryDisplayDevice.getDisplayDeviceInfoLocked(); 227 if (!Objects.equal(mPrimaryDisplayDeviceInfo, deviceInfo)) { 228 mBaseDisplayInfo.layerStack = mLayerStack; 229 mBaseDisplayInfo.flags = 0; 230 if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_SUPPORTS_PROTECTED_BUFFERS) != 0) { 231 mBaseDisplayInfo.flags |= Display.FLAG_SUPPORTS_PROTECTED_BUFFERS; 232 } 233 if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_SECURE) != 0) { 234 mBaseDisplayInfo.flags |= Display.FLAG_SECURE; 235 } 236 if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_PRIVATE) != 0) { 237 mBaseDisplayInfo.flags |= Display.FLAG_PRIVATE; 238 // For private displays by default content is destroyed on removal. 239 mBaseDisplayInfo.removeMode = Display.REMOVE_MODE_DESTROY_CONTENT; 240 } 241 if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_PRESENTATION) != 0) { 242 mBaseDisplayInfo.flags |= Display.FLAG_PRESENTATION; 243 } 244 if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_ROUND) != 0) { 245 mBaseDisplayInfo.flags |= Display.FLAG_ROUND; 246 } 247 if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD) != 0) { 248 mBaseDisplayInfo.flags |= Display.FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD; 249 } 250 mBaseDisplayInfo.type = deviceInfo.type; 251 mBaseDisplayInfo.address = deviceInfo.address; 252 mBaseDisplayInfo.name = deviceInfo.name; 253 mBaseDisplayInfo.uniqueId = deviceInfo.uniqueId; 254 mBaseDisplayInfo.appWidth = deviceInfo.width; 255 mBaseDisplayInfo.appHeight = deviceInfo.height; 256 mBaseDisplayInfo.logicalWidth = deviceInfo.width; 257 mBaseDisplayInfo.logicalHeight = deviceInfo.height; 258 mBaseDisplayInfo.rotation = Surface.ROTATION_0; 259 mBaseDisplayInfo.modeId = deviceInfo.modeId; 260 mBaseDisplayInfo.defaultModeId = deviceInfo.defaultModeId; 261 mBaseDisplayInfo.supportedModes = Arrays.copyOf( 262 deviceInfo.supportedModes, deviceInfo.supportedModes.length); 263 mBaseDisplayInfo.colorMode = deviceInfo.colorMode; 264 mBaseDisplayInfo.supportedColorModes = Arrays.copyOf( 265 deviceInfo.supportedColorModes, 266 deviceInfo.supportedColorModes.length); 267 mBaseDisplayInfo.hdrCapabilities = deviceInfo.hdrCapabilities; 268 mBaseDisplayInfo.logicalDensityDpi = deviceInfo.densityDpi; 269 mBaseDisplayInfo.physicalXDpi = deviceInfo.xDpi; 270 mBaseDisplayInfo.physicalYDpi = deviceInfo.yDpi; 271 mBaseDisplayInfo.appVsyncOffsetNanos = deviceInfo.appVsyncOffsetNanos; 272 mBaseDisplayInfo.presentationDeadlineNanos = deviceInfo.presentationDeadlineNanos; 273 mBaseDisplayInfo.state = deviceInfo.state; 274 mBaseDisplayInfo.smallestNominalAppWidth = deviceInfo.width; 275 mBaseDisplayInfo.smallestNominalAppHeight = deviceInfo.height; 276 mBaseDisplayInfo.largestNominalAppWidth = deviceInfo.width; 277 mBaseDisplayInfo.largestNominalAppHeight = deviceInfo.height; 278 mBaseDisplayInfo.ownerUid = deviceInfo.ownerUid; 279 mBaseDisplayInfo.ownerPackageName = deviceInfo.ownerPackageName; 280 281 mPrimaryDisplayDeviceInfo = deviceInfo; 282 mInfo = null; 283 } 284 } 285 286 /** 287 * Applies the layer stack and transformation to the given display device 288 * so that it shows the contents of this logical display. 289 * 290 * We know that the given display device is only ever showing the contents of 291 * a single logical display, so this method is expected to blow away all of its 292 * transformation properties to make it happen regardless of what the 293 * display device was previously showing. 294 * 295 * The caller must have an open Surface transaction. 296 * 297 * The display device may not be the primary display device, in the case 298 * where the display is being mirrored. 299 * 300 * @param device The display device to modify. 301 * @param isBlanked True if the device is being blanked. 302 */ 303 public void configureDisplayInTransactionLocked(DisplayDevice device, 304 boolean isBlanked) { 305 // Set the layer stack. 306 device.setLayerStackInTransactionLocked(isBlanked ? BLANK_LAYER_STACK : mLayerStack); 307 308 // Set the color mode and mode. 309 if (device == mPrimaryDisplayDevice) { 310 device.requestDisplayModesInTransactionLocked( 311 mRequestedColorMode, mRequestedModeId); 312 } else { 313 device.requestDisplayModesInTransactionLocked(0, 0); // Revert to default. 314 } 315 316 // Only grab the display info now as it may have been changed based on the requests above. 317 final DisplayInfo displayInfo = getDisplayInfoLocked(); 318 final DisplayDeviceInfo displayDeviceInfo = device.getDisplayDeviceInfoLocked(); 319 320 // Set the viewport. 321 // This is the area of the logical display that we intend to show on the 322 // display device. For now, it is always the full size of the logical display. 323 mTempLayerStackRect.set(0, 0, displayInfo.logicalWidth, displayInfo.logicalHeight); 324 325 // Set the orientation. 326 // The orientation specifies how the physical coordinate system of the display 327 // is rotated when the contents of the logical display are rendered. 328 int orientation = Surface.ROTATION_0; 329 if ((displayDeviceInfo.flags & DisplayDeviceInfo.FLAG_ROTATES_WITH_CONTENT) != 0) { 330 orientation = displayInfo.rotation; 331 } 332 333 // Apply the physical rotation of the display device itself. 334 orientation = (orientation + displayDeviceInfo.rotation) % 4; 335 336 // Set the frame. 337 // The frame specifies the rotated physical coordinates into which the viewport 338 // is mapped. We need to take care to preserve the aspect ratio of the viewport. 339 // Currently we maximize the area to fill the display, but we could try to be 340 // more clever and match resolutions. 341 boolean rotated = (orientation == Surface.ROTATION_90 342 || orientation == Surface.ROTATION_270); 343 int physWidth = rotated ? displayDeviceInfo.height : displayDeviceInfo.width; 344 int physHeight = rotated ? displayDeviceInfo.width : displayDeviceInfo.height; 345 346 // Determine whether the width or height is more constrained to be scaled. 347 // physWidth / displayInfo.logicalWidth => letter box 348 // or physHeight / displayInfo.logicalHeight => pillar box 349 // 350 // We avoid a division (and possible floating point imprecision) here by 351 // multiplying the fractions by the product of their denominators before 352 // comparing them. 353 int displayRectWidth, displayRectHeight; 354 if ((displayInfo.flags & Display.FLAG_SCALING_DISABLED) != 0) { 355 displayRectWidth = displayInfo.logicalWidth; 356 displayRectHeight = displayInfo.logicalHeight; 357 } else if (physWidth * displayInfo.logicalHeight 358 < physHeight * displayInfo.logicalWidth) { 359 // Letter box. 360 displayRectWidth = physWidth; 361 displayRectHeight = displayInfo.logicalHeight * physWidth / displayInfo.logicalWidth; 362 } else { 363 // Pillar box. 364 displayRectWidth = displayInfo.logicalWidth * physHeight / displayInfo.logicalHeight; 365 displayRectHeight = physHeight; 366 } 367 int displayRectTop = (physHeight - displayRectHeight) / 2; 368 int displayRectLeft = (physWidth - displayRectWidth) / 2; 369 mTempDisplayRect.set(displayRectLeft, displayRectTop, 370 displayRectLeft + displayRectWidth, displayRectTop + displayRectHeight); 371 372 mTempDisplayRect.left += mDisplayOffsetX; 373 mTempDisplayRect.right += mDisplayOffsetX; 374 mTempDisplayRect.top += mDisplayOffsetY; 375 mTempDisplayRect.bottom += mDisplayOffsetY; 376 device.setProjectionInTransactionLocked(orientation, mTempLayerStackRect, mTempDisplayRect); 377 } 378 379 /** 380 * Returns true if the logical display has unique content. 381 * <p> 382 * If the display has unique content then we will try to ensure that it is 383 * visible on at least its primary display device. Otherwise we will ignore the 384 * logical display and perhaps show mirrored content on the primary display device. 385 * </p> 386 * 387 * @return True if the display has unique content. 388 */ 389 public boolean hasContentLocked() { 390 return mHasContent; 391 } 392 393 /** 394 * Sets whether the logical display has unique content. 395 * 396 * @param hasContent True if the display has unique content. 397 */ 398 public void setHasContentLocked(boolean hasContent) { 399 mHasContent = hasContent; 400 } 401 402 /** 403 * Requests the given mode. 404 */ 405 public void setRequestedModeIdLocked(int modeId) { 406 mRequestedModeId = modeId; 407 } 408 409 /** 410 * Returns the pending requested mode. 411 */ 412 public int getRequestedModeIdLocked() { 413 return mRequestedModeId; 414 } 415 416 /** 417 * Requests the given color mode. 418 */ 419 public void setRequestedColorModeLocked(int colorMode) { 420 mRequestedColorMode = colorMode; 421 } 422 423 /** Returns the pending requested color mode. */ 424 public int getRequestedColorModeLocked() { 425 return mRequestedColorMode; 426 } 427 428 /** 429 * Gets the burn-in offset in X. 430 */ 431 public int getDisplayOffsetXLocked() { 432 return mDisplayOffsetX; 433 } 434 435 /** 436 * Gets the burn-in offset in Y. 437 */ 438 public int getDisplayOffsetYLocked() { 439 return mDisplayOffsetY; 440 } 441 442 /** 443 * Sets the burn-in offsets. 444 */ 445 public void setDisplayOffsetsLocked(int x, int y) { 446 mDisplayOffsetX = x; 447 mDisplayOffsetY = y; 448 } 449 450 public void dumpLocked(PrintWriter pw) { 451 pw.println("mDisplayId=" + mDisplayId); 452 pw.println("mLayerStack=" + mLayerStack); 453 pw.println("mHasContent=" + mHasContent); 454 pw.println("mRequestedMode=" + mRequestedModeId); 455 pw.println("mRequestedColorMode=" + mRequestedColorMode); 456 pw.println("mDisplayOffset=(" + mDisplayOffsetX + ", " + mDisplayOffsetY + ")"); 457 pw.println("mPrimaryDisplayDevice=" + (mPrimaryDisplayDevice != null ? 458 mPrimaryDisplayDevice.getNameLocked() : "null")); 459 pw.println("mBaseDisplayInfo=" + mBaseDisplayInfo); 460 pw.println("mOverrideDisplayInfo=" + mOverrideDisplayInfo); 461 } 462 } 463
