Layer.h revision 8b3871addb9bbd5776f4ed59e67af2baa9c583fd
1/* 2 * Copyright (C) 2007 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#ifndef ANDROID_LAYER_H 18#define ANDROID_LAYER_H 19 20#include <stdint.h> 21#include <sys/types.h> 22 23#include <EGL/egl.h> 24#include <EGL/eglext.h> 25 26#include <utils/RefBase.h> 27#include <utils/String8.h> 28#include <utils/Timers.h> 29 30#include <ui/FrameStats.h> 31#include <ui/GraphicBuffer.h> 32#include <ui/PixelFormat.h> 33#include <ui/Region.h> 34 35#include <gui/ISurfaceComposerClient.h> 36#include <gui/LayerState.h> 37 38#include <list> 39 40#include "Client.h" 41#include "FrameTracker.h" 42#include "LayerVector.h" 43#include "MonitoredProducer.h" 44#include "SurfaceFlinger.h" 45#include "SurfaceFlingerConsumer.h" 46#include "Transform.h" 47 48#include <layerproto/LayerProtoHeader.h> 49#include "DisplayHardware/HWComposer.h" 50#include "DisplayHardware/HWComposerBufferCache.h" 51#include "RenderArea.h" 52#include "RenderEngine/Mesh.h" 53#include "RenderEngine/Texture.h" 54 55#include <math/vec4.h> 56 57using namespace android::surfaceflinger; 58 59namespace android { 60 61// --------------------------------------------------------------------------- 62 63class Client; 64class Colorizer; 65class DisplayDevice; 66class GraphicBuffer; 67class SurfaceFlinger; 68class LayerDebugInfo; 69 70// --------------------------------------------------------------------------- 71 72class Layer : public virtual RefBase { 73 static int32_t sSequence; 74 75public: 76 mutable bool contentDirty; 77 // regions below are in window-manager space 78 Region visibleRegion; 79 Region coveredRegion; 80 Region visibleNonTransparentRegion; 81 Region surfaceDamageRegion; 82 83 // Layer serial number. This gives layers an explicit ordering, so we 84 // have a stable sort order when their layer stack and Z-order are 85 // the same. 86 int32_t sequence; 87 88 enum { // flags for doTransaction() 89 eDontUpdateGeometryState = 0x00000001, 90 eVisibleRegion = 0x00000002, 91 }; 92 93 struct Geometry { 94 uint32_t w; 95 uint32_t h; 96 Transform transform; 97 98 inline bool operator==(const Geometry& rhs) const { 99 return (w == rhs.w && h == rhs.h) && (transform.tx() == rhs.transform.tx()) && 100 (transform.ty() == rhs.transform.ty()); 101 } 102 inline bool operator!=(const Geometry& rhs) const { return !operator==(rhs); } 103 }; 104 105 struct State { 106 Geometry active; 107 Geometry requested; 108 int32_t z; 109 110 // The identifier of the layer stack this layer belongs to. A layer can 111 // only be associated to a single layer stack. A layer stack is a 112 // z-ordered group of layers which can be associated to one or more 113 // displays. Using the same layer stack on different displays is a way 114 // to achieve mirroring. 115 uint32_t layerStack; 116 117 uint8_t flags; 118 uint8_t mask; 119 uint8_t reserved[2]; 120 int32_t sequence; // changes when visible regions can change 121 bool modified; 122 123 // Crop is expressed in layer space coordinate. 124 Rect crop; 125 Rect requestedCrop; 126 127 // finalCrop is expressed in display space coordinate. 128 Rect finalCrop; 129 Rect requestedFinalCrop; 130 131 // If set, defers this state update until the identified Layer 132 // receives a frame with the given frameNumber 133 wp<Layer> barrierLayer; 134 uint64_t frameNumber; 135 136 // the transparentRegion hint is a bit special, it's latched only 137 // when we receive a buffer -- this is because it's "content" 138 // dependent. 139 Region activeTransparentRegion; 140 Region requestedTransparentRegion; 141 android_dataspace dataSpace; 142 143 uint32_t appId; 144 uint32_t type; 145 146 // If non-null, a Surface this Surface's Z-order is interpreted relative to. 147 wp<Layer> zOrderRelativeOf; 148 149 // A list of surfaces whose Z-order is interpreted relative to ours. 150 SortedVector<wp<Layer>> zOrderRelatives; 151 152 half4 color; 153 }; 154 155 Layer(SurfaceFlinger* flinger, const sp<Client>& client, const String8& name, uint32_t w, 156 uint32_t h, uint32_t flags); 157 virtual ~Layer(); 158 159 void setPrimaryDisplayOnly() { mPrimaryDisplayOnly = true; } 160 161 // ------------------------------------------------------------------------ 162 // Geometry setting functions. 163 // 164 // The following group of functions are used to specify the layers 165 // bounds, and the mapping of the texture on to those bounds. According 166 // to various settings changes to them may apply immediately, or be delayed until 167 // a pending resize is completed by the producer submitting a buffer. For example 168 // if we were to change the buffer size, and update the matrix ahead of the 169 // new buffer arriving, then we would be stretching the buffer to a different 170 // aspect before and after the buffer arriving, which probably isn't what we wanted. 171 // 172 // The first set of geometry functions are controlled by the scaling mode, described 173 // in window.h. The scaling mode may be set by the client, as it submits buffers. 174 // This value may be overriden through SurfaceControl, with setOverrideScalingMode. 175 // 176 // Put simply, if our scaling mode is SCALING_MODE_FREEZE, then 177 // matrix updates will not be applied while a resize is pending 178 // and the size and transform will remain in their previous state 179 // until a new buffer is submitted. If the scaling mode is another value 180 // then the old-buffer will immediately be scaled to the pending size 181 // and the new matrix will be immediately applied following this scaling 182 // transformation. 183 184 // Set the default buffer size for the assosciated Producer, in pixels. This is 185 // also the rendered size of the layer prior to any transformations. Parent 186 // or local matrix transformations will not affect the size of the buffer, 187 // but may affect it's on-screen size or clipping. 188 bool setSize(uint32_t w, uint32_t h); 189 // Set a 2x2 transformation matrix on the layer. This transform 190 // will be applied after parent transforms, but before any final 191 // producer specified transform. 192 bool setMatrix(const layer_state_t::matrix22_t& matrix); 193 194 // This second set of geometry attributes are controlled by 195 // setGeometryAppliesWithResize, and their default mode is to be 196 // immediate. If setGeometryAppliesWithResize is specified 197 // while a resize is pending, then update of these attributes will 198 // be delayed until the resize completes. 199 200 // setPosition operates in parent buffer space (pre parent-transform) or display 201 // space for top-level layers. 202 bool setPosition(float x, float y, bool immediate); 203 // Buffer space 204 bool setCrop(const Rect& crop, bool immediate); 205 // Parent buffer space/display space 206 bool setFinalCrop(const Rect& crop, bool immediate); 207 208 // TODO(b/38182121): Could we eliminate the various latching modes by 209 // using the layer hierarchy? 210 // ----------------------------------------------------------------------- 211 bool setLayer(int32_t z); 212 bool setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t relativeZ); 213 214 bool setAlpha(float alpha); 215 bool setColor(const half3& color); 216 bool setTransparentRegionHint(const Region& transparent); 217 bool setFlags(uint8_t flags, uint8_t mask); 218 bool setLayerStack(uint32_t layerStack); 219 bool setDataSpace(android_dataspace dataSpace); 220 android_dataspace getDataSpace() const; 221 uint32_t getLayerStack() const; 222 void deferTransactionUntil(const sp<IBinder>& barrierHandle, uint64_t frameNumber); 223 void deferTransactionUntil(const sp<Layer>& barrierLayer, uint64_t frameNumber); 224 bool setOverrideScalingMode(int32_t overrideScalingMode); 225 void setInfo(uint32_t type, uint32_t appId); 226 bool reparentChildren(const sp<IBinder>& layer); 227 bool reparent(const sp<IBinder>& newParentHandle); 228 bool detachChildren(); 229 230 // If we have received a new buffer this frame, we will pass its surface 231 // damage down to hardware composer. Otherwise, we must send a region with 232 // one empty rect. 233 void useSurfaceDamage(); 234 void useEmptyDamage(); 235 236 uint32_t getTransactionFlags(uint32_t flags); 237 uint32_t setTransactionFlags(uint32_t flags); 238 239 bool belongsToDisplay(uint32_t layerStack, bool isPrimaryDisplay) const { 240 return getLayerStack() == layerStack && (!mPrimaryDisplayOnly || isPrimaryDisplay); 241 } 242 243 void computeGeometry(const RenderArea& renderArea, Mesh& mesh, bool useIdentityTransform) const; 244 Rect computeBounds(const Region& activeTransparentRegion) const; 245 Rect computeBounds() const; 246 247 int32_t getSequence() const { return sequence; } 248 249 // ----------------------------------------------------------------------- 250 // Virtuals 251 virtual const char* getTypeId() const = 0; 252 253 /* 254 * isOpaque - true if this surface is opaque 255 * 256 * This takes into account the buffer format (i.e. whether or not the 257 * pixel format includes an alpha channel) and the "opaque" flag set 258 * on the layer. It does not examine the current plane alpha value. 259 */ 260 virtual bool isOpaque(const Layer::State& s) const = 0; 261 262 /* 263 * isSecure - true if this surface is secure, that is if it prevents 264 * screenshots or VNC servers. 265 */ 266 bool isSecure() const; 267 268 /* 269 * isVisible - true if this layer is visible, false otherwise 270 */ 271 virtual bool isVisible() const = 0; 272 273 /* 274 * isHiddenByPolicy - true if this layer has been forced invisible. 275 * just because this is false, doesn't mean isVisible() is true. 276 * For example if this layer has no active buffer, it may not be hidden by 277 * policy, but it still can not be visible. 278 */ 279 bool isHiddenByPolicy() const; 280 281 /* 282 * isFixedSize - true if content has a fixed size 283 */ 284 virtual bool isFixedSize() const = 0; 285 286 bool isPendingRemoval() const { return mPendingRemoval; } 287 288 void writeToProto(LayerProto* layerInfo, 289 LayerVector::StateSet stateSet = LayerVector::StateSet::Drawing); 290 291protected: 292 /* 293 * onDraw - draws the surface. 294 */ 295 virtual void onDraw(const RenderArea& renderArea, const Region& clip, 296 bool useIdentityTransform) const = 0; 297 298public: 299#ifdef USE_HWC2 300 void setGeometry(const sp<const DisplayDevice>& displayDevice, uint32_t z); 301 void forceClientComposition(int32_t hwcId); 302 void setPerFrameData(const sp<const DisplayDevice>& displayDevice); 303 304 // callIntoHwc exists so we can update our local state and call 305 // acceptDisplayChanges without unnecessarily updating the device's state 306 void setCompositionType(int32_t hwcId, HWC2::Composition type, bool callIntoHwc = true); 307 HWC2::Composition getCompositionType(int32_t hwcId) const; 308 void setClearClientTarget(int32_t hwcId, bool clear); 309 bool getClearClientTarget(int32_t hwcId) const; 310 void updateCursorPosition(const sp<const DisplayDevice>& hw); 311#else 312 void setGeometry(const sp<const DisplayDevice>& hw, HWComposer::HWCLayerInterface& layer); 313 void setPerFrameData(const sp<const DisplayDevice>& hw, HWComposer::HWCLayerInterface& layer); 314 void setAcquireFence(const sp<const DisplayDevice>& hw, 315 HWComposer::HWCLayerInterface& layer); 316 Rect getPosition(const sp<const DisplayDevice>& hw); 317#endif 318 319 /* 320 * called after page-flip 321 */ 322#ifdef USE_HWC2 323 void onLayerDisplayed(const sp<Fence>& releaseFence); 324#else 325 void onLayerDisplayed(const sp<const DisplayDevice>& hw, HWComposer::HWCLayerInterface* layer); 326#endif 327 328 bool shouldPresentNow(const DispSync& dispSync) const; 329 330 /* 331 * called before composition. 332 * returns true if the layer has pending updates. 333 */ 334 virtual bool onPreComposition(nsecs_t refreshStartTime) = 0; 335 336 /* 337 * called after composition. 338 * returns true if the layer latched a new buffer this frame. 339 */ 340 bool onPostComposition(const std::shared_ptr<FenceTime>& glDoneFence, 341 const std::shared_ptr<FenceTime>& presentFence, 342 const CompositorTiming& compositorTiming); 343 344#ifdef USE_HWC2 345 // If a buffer was replaced this frame, release the former buffer 346 virtual void releasePendingBuffer(nsecs_t dequeueReadyTime) = 0; 347#endif 348 349 /* 350 * draw - performs some global clipping optimizations 351 * and calls onDraw(). 352 */ 353 void draw(const RenderArea& renderArea, const Region& clip) const; 354 void draw(const RenderArea& renderArea, bool useIdentityTransform) const; 355 void draw(const RenderArea& renderArea) const; 356 357 /* 358 * doTransaction - process the transaction. This is a good place to figure 359 * out which attributes of the surface have changed. 360 */ 361 uint32_t doTransaction(uint32_t transactionFlags); 362 363 /* 364 * setVisibleRegion - called to set the new visible region. This gives 365 * a chance to update the new visible region or record the fact it changed. 366 */ 367 void setVisibleRegion(const Region& visibleRegion); 368 369 /* 370 * setCoveredRegion - called when the covered region changes. The covered 371 * region corresponds to any area of the surface that is covered 372 * (transparently or not) by another surface. 373 */ 374 void setCoveredRegion(const Region& coveredRegion); 375 376 /* 377 * setVisibleNonTransparentRegion - called when the visible and 378 * non-transparent region changes. 379 */ 380 void setVisibleNonTransparentRegion(const Region& visibleNonTransparentRegion); 381 382 /* 383 * latchBuffer - called each time the screen is redrawn and returns whether 384 * the visible regions need to be recomputed (this is a fairly heavy 385 * operation, so this should be set only if needed). Typically this is used 386 * to figure out if the content or size of a surface has changed. 387 */ 388 virtual Region latchBuffer(bool& recomputeVisibleRegions, nsecs_t latchTime) = 0; 389 virtual bool isBufferLatched() const = 0; 390 391 bool isPotentialCursor() const { return mPotentialCursor; } 392 /* 393 * called with the state lock from a binder thread when the layer is 394 * removed from the current list to the pending removal list 395 */ 396 void onRemovedFromCurrentState(); 397 398 /* 399 * called with the state lock from the main thread when the layer is 400 * removed from the pending removal list 401 */ 402 void onRemoved(); 403 404 // Updates the transform hint in our SurfaceFlingerConsumer to match 405 // the current orientation of the display device. 406 void updateTransformHint(const sp<const DisplayDevice>& hw) const; 407 408 /* 409 * returns the rectangle that crops the content of the layer and scales it 410 * to the layer's size. 411 */ 412 Rect getContentCrop() const; 413 414 /* 415 * Returns if a frame is queued. 416 */ 417 bool hasQueuedFrame() const { 418 return mQueuedFrames > 0 || mSidebandStreamChanged || mAutoRefresh; 419 } 420 421 int32_t getQueuedFrameCount() const { return mQueuedFrames; } 422 423#ifdef USE_HWC2 424 // ----------------------------------------------------------------------- 425 426 bool createHwcLayer(HWComposer* hwc, int32_t hwcId); 427 void destroyHwcLayer(int32_t hwcId); 428 void destroyAllHwcLayers(); 429 430 bool hasHwcLayer(int32_t hwcId) { return mHwcLayers.count(hwcId) > 0; } 431 432 HWC2::Layer* getHwcLayer(int32_t hwcId) { 433 if (mHwcLayers.count(hwcId) == 0) { 434 return nullptr; 435 } 436 return mHwcLayers[hwcId].layer; 437 } 438 439#endif 440 // ----------------------------------------------------------------------- 441 442 void clearWithOpenGL(const RenderArea& renderArea) const; 443 void setFiltering(bool filtering); 444 bool getFiltering() const; 445 446 // only for debugging 447 inline const sp<GraphicBuffer>& getActiveBuffer() const { return mActiveBuffer; } 448 449 inline const State& getDrawingState() const { return mDrawingState; } 450 inline const State& getCurrentState() const { return mCurrentState; } 451 inline State& getCurrentState() { return mCurrentState; } 452 453 LayerDebugInfo getLayerDebugInfo() const; 454 455 /* always call base class first */ 456#ifdef USE_HWC2 457 static void miniDumpHeader(String8& result); 458 void miniDump(String8& result, int32_t hwcId) const; 459#endif 460 void dumpFrameStats(String8& result) const; 461 void dumpFrameEvents(String8& result); 462 void clearFrameStats(); 463 void logFrameStats(); 464 void getFrameStats(FrameStats* outStats) const; 465 466 std::vector<OccupancyTracker::Segment> getOccupancyHistory(bool forceFlush); 467 468 void onDisconnect(); 469 void addAndGetFrameTimestamps(const NewFrameEventsEntry* newEntry, 470 FrameEventHistoryDelta* outDelta); 471 472 bool getTransformToDisplayInverse() const; 473 474 Transform getTransform() const; 475 476 // Returns the Alpha of the Surface, accounting for the Alpha 477 // of parent Surfaces in the hierarchy (alpha's will be multiplied 478 // down the hierarchy). 479 half getAlpha() const; 480 half4 getColor() const; 481 482 void traverseInReverseZOrder(LayerVector::StateSet stateSet, 483 const LayerVector::Visitor& visitor); 484 void traverseInZOrder(LayerVector::StateSet stateSet, const LayerVector::Visitor& visitor); 485 486 void traverseChildrenInZOrder(LayerVector::StateSet stateSet, 487 const LayerVector::Visitor& visitor); 488 489 size_t getChildrenCount() const; 490 void addChild(const sp<Layer>& layer); 491 // Returns index if removed, or negative value otherwise 492 // for symmetry with Vector::remove 493 ssize_t removeChild(const sp<Layer>& layer); 494 sp<Layer> getParent() const { return mCurrentParent.promote(); } 495 bool hasParent() const { return getParent() != nullptr; } 496 Rect computeScreenBounds(bool reduceTransparentRegion = true) const; 497 bool setChildLayer(const sp<Layer>& childLayer, int32_t z); 498 499 // Copy the current list of children to the drawing state. Called by 500 // SurfaceFlinger to complete a transaction. 501 void commitChildList(); 502 int32_t getZ() const; 503 504protected: 505 // constant 506 sp<SurfaceFlinger> mFlinger; 507 /* 508 * Trivial class, used to ensure that mFlinger->onLayerDestroyed(mLayer) 509 * is called. 510 */ 511 class LayerCleaner { 512 sp<SurfaceFlinger> mFlinger; 513 wp<Layer> mLayer; 514 515 protected: 516 ~LayerCleaner() { 517 // destroy client resources 518 mFlinger->onLayerDestroyed(mLayer); 519 } 520 521 public: 522 LayerCleaner(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) 523 : mFlinger(flinger), mLayer(layer) {} 524 }; 525 526 virtual void onFirstRef(); 527 528 friend class SurfaceInterceptor; 529 void commitTransaction(const State& stateToCommit); 530 531 uint32_t getEffectiveUsage(uint32_t usage) const; 532 533 FloatRect computeCrop(const sp<const DisplayDevice>& hw) const; 534 // Compute the initial crop as specified by parent layers and the 535 // SurfaceControl for this layer. Does not include buffer crop from the 536 // IGraphicBufferProducer client, as that should not affect child clipping. 537 // Returns in screen space. 538 Rect computeInitialCrop(const sp<const DisplayDevice>& hw) const; 539 540 // drawing 541 void clearWithOpenGL(const RenderArea& renderArea, float r, float g, float b, 542 float alpha) const; 543 544 void setParent(const sp<Layer>& layer); 545 546 LayerVector makeTraversalList(LayerVector::StateSet stateSet); 547 void addZOrderRelative(const wp<Layer>& relative); 548 void removeZOrderRelative(const wp<Layer>& relative); 549 550protected: 551 class SyncPoint { 552 public: 553 explicit SyncPoint(uint64_t frameNumber) 554 : mFrameNumber(frameNumber), mFrameIsAvailable(false), mTransactionIsApplied(false) {} 555 556 uint64_t getFrameNumber() const { return mFrameNumber; } 557 558 bool frameIsAvailable() const { return mFrameIsAvailable; } 559 560 void setFrameAvailable() { mFrameIsAvailable = true; } 561 562 bool transactionIsApplied() const { return mTransactionIsApplied; } 563 564 void setTransactionApplied() { mTransactionIsApplied = true; } 565 566 private: 567 const uint64_t mFrameNumber; 568 std::atomic<bool> mFrameIsAvailable; 569 std::atomic<bool> mTransactionIsApplied; 570 }; 571 572 // SyncPoints which will be signaled when the correct frame is at the head 573 // of the queue and dropped after the frame has been latched. Protected by 574 // mLocalSyncPointMutex. 575 Mutex mLocalSyncPointMutex; 576 std::list<std::shared_ptr<SyncPoint>> mLocalSyncPoints; 577 578 // SyncPoints which will be signaled and then dropped when the transaction 579 // is applied 580 std::list<std::shared_ptr<SyncPoint>> mRemoteSyncPoints; 581 582 // Returns false if the relevant frame has already been latched 583 bool addSyncPoint(const std::shared_ptr<SyncPoint>& point); 584 585 void pushPendingState(); 586 void popPendingState(State* stateToCommit); 587 bool applyPendingStates(State* stateToCommit); 588 589 void clearSyncPoints(); 590 591 // Returns mCurrentScaling mode (originating from the 592 // Client) or mOverrideScalingMode mode (originating from 593 // the Surface Controller) if set. 594 virtual uint32_t getEffectiveScalingMode() const = 0; 595 596public: 597 /* 598 * The layer handle is just a BBinder object passed to the client 599 * (remote process) -- we don't keep any reference on our side such that 600 * the dtor is called when the remote side let go of its reference. 601 * 602 * LayerCleaner ensures that mFlinger->onLayerDestroyed() is called for 603 * this layer when the handle is destroyed. 604 */ 605 class Handle : public BBinder, public LayerCleaner { 606 public: 607 Handle(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) 608 : LayerCleaner(flinger, layer), owner(layer) {} 609 610 wp<Layer> owner; 611 }; 612 613 sp<IBinder> getHandle(); 614 const String8& getName() const; 615 virtual void notifyAvailableFrames() = 0; 616 virtual PixelFormat getPixelFormat() const = 0; 617 bool getPremultipledAlpha() const; 618 619protected: 620 // ----------------------------------------------------------------------- 621 622 // constants 623 sp<SurfaceFlingerConsumer> mSurfaceFlingerConsumer; 624 bool mPremultipliedAlpha; 625 String8 mName; 626 String8 mTransactionName; // A cached version of "TX - " + mName for systraces 627 628 bool mPrimaryDisplayOnly = false; 629 630 // these are protected by an external lock 631 State mCurrentState; 632 State mDrawingState; 633 volatile int32_t mTransactionFlags; 634 635 // Accessed from main thread and binder threads 636 Mutex mPendingStateMutex; 637 Vector<State> mPendingStates; 638 639 // thread-safe 640 volatile int32_t mQueuedFrames; 641 volatile int32_t mSidebandStreamChanged; // used like an atomic boolean 642 643 // Timestamp history for UIAutomation. Thread safe. 644 FrameTracker mFrameTracker; 645 646 // Timestamp history for the consumer to query. 647 // Accessed by both consumer and producer on main and binder threads. 648 Mutex mFrameEventHistoryMutex; 649 ConsumerFrameEventHistory mFrameEventHistory; 650 FenceTimeline mAcquireTimeline; 651 FenceTimeline mReleaseTimeline; 652 653 // main thread 654 int mActiveBufferSlot; 655 sp<GraphicBuffer> mActiveBuffer; 656 sp<NativeHandle> mSidebandStream; 657 Rect mCurrentCrop; 658 uint32_t mCurrentTransform; 659 // We encode unset as -1. 660 int32_t mOverrideScalingMode; 661 bool mCurrentOpacity; 662 std::atomic<uint64_t> mCurrentFrameNumber; 663 bool mFrameLatencyNeeded; 664 // Whether filtering is forced on or not 665 bool mFiltering; 666 // Whether filtering is needed b/c of the drawingstate 667 bool mNeedsFiltering; 668 // The mesh used to draw the layer in GLES composition mode 669 mutable Mesh mMesh; 670 671 bool mPendingRemoval = false; 672 673#ifdef USE_HWC2 674 // HWC items, accessed from the main thread 675 struct HWCInfo { 676 HWCInfo() 677 : hwc(nullptr), 678 layer(nullptr), 679 forceClientComposition(false), 680 compositionType(HWC2::Composition::Invalid), 681 clearClientTarget(false) {} 682 683 HWComposer* hwc; 684 HWC2::Layer* layer; 685 bool forceClientComposition; 686 HWC2::Composition compositionType; 687 bool clearClientTarget; 688 Rect displayFrame; 689 FloatRect sourceCrop; 690 HWComposerBufferCache bufferCache; 691 }; 692 693 // A layer can be attached to multiple displays when operating in mirror mode 694 // (a.k.a: when several displays are attached with equal layerStack). In this 695 // case we need to keep track. In non-mirror mode, a layer will have only one 696 // HWCInfo. This map key is a display layerStack. 697 std::unordered_map<int32_t, HWCInfo> mHwcLayers; 698#else 699 bool mIsGlesComposition; 700#endif 701 702 // page-flip thread (currently main thread) 703 bool mProtectedByApp; // application requires protected path to external sink 704 705 // protected by mLock 706 mutable Mutex mLock; 707 708 const wp<Client> mClientRef; 709 710 // This layer can be a cursor on some displays. 711 bool mPotentialCursor; 712 713 // Local copy of the queued contents of the incoming BufferQueue 714 mutable Mutex mQueueItemLock; 715 Condition mQueueItemCondition; 716 Vector<BufferItem> mQueueItems; 717 std::atomic<uint64_t> mLastFrameNumberReceived; 718 bool mAutoRefresh; 719 bool mFreezeGeometryUpdates; 720 721 // Child list about to be committed/used for editing. 722 LayerVector mCurrentChildren; 723 // Child list used for rendering. 724 LayerVector mDrawingChildren; 725 726 wp<Layer> mCurrentParent; 727 wp<Layer> mDrawingParent; 728}; 729 730// --------------------------------------------------------------------------- 731 732}; // namespace android 733 734#endif // ANDROID_LAYER_H 735