Layer.h revision e5f4f694f11ad1e8a9bb3b1b9579a175435c7c19
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 <utils/RefBase.h> 24#include <utils/String8.h> 25#include <utils/Timers.h> 26 27#include <ui/FloatRect.h> 28#include <ui/FrameStats.h> 29#include <ui/GraphicBuffer.h> 30#include <ui/PixelFormat.h> 31#include <ui/Region.h> 32 33#include <gui/ISurfaceComposerClient.h> 34#include <gui/LayerState.h> 35#include <gui/BufferQueue.h> 36 37#include <list> 38 39#include "Client.h" 40#include "FrameTracker.h" 41#include "LayerVector.h" 42#include "MonitoredProducer.h" 43#include "SurfaceFlinger.h" 44#include "Transform.h" 45 46#include <layerproto/LayerProtoHeader.h> 47#include "DisplayHardware/HWComposer.h" 48#include "DisplayHardware/HWComposerBufferCache.h" 49#include "RenderArea.h" 50#include "RenderEngine/Mesh.h" 51#include "RenderEngine/Texture.h" 52 53#include <math/vec4.h> 54 55using namespace android::surfaceflinger; 56 57namespace android { 58 59// --------------------------------------------------------------------------- 60 61class Client; 62class Colorizer; 63class DisplayDevice; 64class GraphicBuffer; 65class SurfaceFlinger; 66class LayerDebugInfo; 67class LayerBE; 68 69// --------------------------------------------------------------------------- 70 71struct CompositionInfo { 72 HWC2::Composition compositionType; 73 sp<GraphicBuffer> mBuffer = nullptr; 74 int mBufferSlot = BufferQueue::INVALID_BUFFER_SLOT; 75 struct { 76 HWComposer* hwc; 77 sp<Fence> fence; 78 HWC2::BlendMode blendMode; 79 Rect displayFrame; 80 float alpha; 81 FloatRect sourceCrop; 82 HWC2::Transform transform; 83 int z; 84 int type; 85 int appId; 86 Region visibleRegion; 87 Region surfaceDamage; 88 sp<NativeHandle> sidebandStream; 89 android_dataspace dataspace; 90 hwc_color_t color; 91 } hwc; 92 struct { 93 RenderEngine* renderEngine; 94 Mesh* mesh; 95 } renderEngine; 96}; 97 98class LayerBE { 99public: 100 LayerBE(); 101 102 // The mesh used to draw the layer in GLES composition mode 103 Mesh mMesh; 104 105 // HWC items, accessed from the main thread 106 struct HWCInfo { 107 HWCInfo() 108 : hwc(nullptr), 109 layer(nullptr), 110 forceClientComposition(false), 111 compositionType(HWC2::Composition::Invalid), 112 clearClientTarget(false) {} 113 114 HWComposer* hwc; 115 HWC2::Layer* layer; 116 bool forceClientComposition; 117 HWC2::Composition compositionType; 118 bool clearClientTarget; 119 Rect displayFrame; 120 FloatRect sourceCrop; 121 HWComposerBufferCache bufferCache; 122 }; 123 124 // A layer can be attached to multiple displays when operating in mirror mode 125 // (a.k.a: when several displays are attached with equal layerStack). In this 126 // case we need to keep track. In non-mirror mode, a layer will have only one 127 // HWCInfo. This map key is a display layerStack. 128 std::unordered_map<int32_t, HWCInfo> mHwcLayers; 129 130 CompositionInfo compositionInfo; 131}; 132 133class Layer : public virtual RefBase { 134 static int32_t sSequence; 135 136public: 137 LayerBE& getBE() { return mBE; } 138 LayerBE& getBE() const { return mBE; } 139 mutable bool contentDirty; 140 // regions below are in window-manager space 141 Region visibleRegion; 142 Region coveredRegion; 143 Region visibleNonTransparentRegion; 144 Region surfaceDamageRegion; 145 146 // Layer serial number. This gives layers an explicit ordering, so we 147 // have a stable sort order when their layer stack and Z-order are 148 // the same. 149 int32_t sequence; 150 151 enum { // flags for doTransaction() 152 eDontUpdateGeometryState = 0x00000001, 153 eVisibleRegion = 0x00000002, 154 }; 155 156 struct Geometry { 157 uint32_t w; 158 uint32_t h; 159 Transform transform; 160 161 inline bool operator==(const Geometry& rhs) const { 162 return (w == rhs.w && h == rhs.h) && (transform.tx() == rhs.transform.tx()) && 163 (transform.ty() == rhs.transform.ty()); 164 } 165 inline bool operator!=(const Geometry& rhs) const { return !operator==(rhs); } 166 }; 167 168 struct State { 169 Geometry active; 170 Geometry requested; 171 int32_t z; 172 173 // The identifier of the layer stack this layer belongs to. A layer can 174 // only be associated to a single layer stack. A layer stack is a 175 // z-ordered group of layers which can be associated to one or more 176 // displays. Using the same layer stack on different displays is a way 177 // to achieve mirroring. 178 uint32_t layerStack; 179 180 uint8_t flags; 181 uint8_t mask; 182 uint8_t reserved[2]; 183 int32_t sequence; // changes when visible regions can change 184 bool modified; 185 186 // Crop is expressed in layer space coordinate. 187 Rect crop; 188 Rect requestedCrop; 189 190 // finalCrop is expressed in display space coordinate. 191 Rect finalCrop; 192 Rect requestedFinalCrop; 193 194 // If set, defers this state update until the identified Layer 195 // receives a frame with the given frameNumber 196 wp<Layer> barrierLayer; 197 uint64_t frameNumber; 198 199 // the transparentRegion hint is a bit special, it's latched only 200 // when we receive a buffer -- this is because it's "content" 201 // dependent. 202 Region activeTransparentRegion; 203 Region requestedTransparentRegion; 204 android_dataspace dataSpace; 205 206 uint32_t appId; 207 uint32_t type; 208 209 // If non-null, a Surface this Surface's Z-order is interpreted relative to. 210 wp<Layer> zOrderRelativeOf; 211 212 // A list of surfaces whose Z-order is interpreted relative to ours. 213 SortedVector<wp<Layer>> zOrderRelatives; 214 215 half4 color; 216 }; 217 218 Layer(SurfaceFlinger* flinger, const sp<Client>& client, const String8& name, uint32_t w, 219 uint32_t h, uint32_t flags); 220 virtual ~Layer(); 221 222 void setPrimaryDisplayOnly() { mPrimaryDisplayOnly = true; } 223 224 // ------------------------------------------------------------------------ 225 // Geometry setting functions. 226 // 227 // The following group of functions are used to specify the layers 228 // bounds, and the mapping of the texture on to those bounds. According 229 // to various settings changes to them may apply immediately, or be delayed until 230 // a pending resize is completed by the producer submitting a buffer. For example 231 // if we were to change the buffer size, and update the matrix ahead of the 232 // new buffer arriving, then we would be stretching the buffer to a different 233 // aspect before and after the buffer arriving, which probably isn't what we wanted. 234 // 235 // The first set of geometry functions are controlled by the scaling mode, described 236 // in window.h. The scaling mode may be set by the client, as it submits buffers. 237 // This value may be overriden through SurfaceControl, with setOverrideScalingMode. 238 // 239 // Put simply, if our scaling mode is SCALING_MODE_FREEZE, then 240 // matrix updates will not be applied while a resize is pending 241 // and the size and transform will remain in their previous state 242 // until a new buffer is submitted. If the scaling mode is another value 243 // then the old-buffer will immediately be scaled to the pending size 244 // and the new matrix will be immediately applied following this scaling 245 // transformation. 246 247 // Set the default buffer size for the assosciated Producer, in pixels. This is 248 // also the rendered size of the layer prior to any transformations. Parent 249 // or local matrix transformations will not affect the size of the buffer, 250 // but may affect it's on-screen size or clipping. 251 bool setSize(uint32_t w, uint32_t h); 252 // Set a 2x2 transformation matrix on the layer. This transform 253 // will be applied after parent transforms, but before any final 254 // producer specified transform. 255 bool setMatrix(const layer_state_t::matrix22_t& matrix); 256 257 // This second set of geometry attributes are controlled by 258 // setGeometryAppliesWithResize, and their default mode is to be 259 // immediate. If setGeometryAppliesWithResize is specified 260 // while a resize is pending, then update of these attributes will 261 // be delayed until the resize completes. 262 263 // setPosition operates in parent buffer space (pre parent-transform) or display 264 // space for top-level layers. 265 bool setPosition(float x, float y, bool immediate); 266 // Buffer space 267 bool setCrop(const Rect& crop, bool immediate); 268 // Parent buffer space/display space 269 bool setFinalCrop(const Rect& crop, bool immediate); 270 271 // TODO(b/38182121): Could we eliminate the various latching modes by 272 // using the layer hierarchy? 273 // ----------------------------------------------------------------------- 274 bool setLayer(int32_t z); 275 bool setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t relativeZ); 276 277 bool setAlpha(float alpha); 278 bool setColor(const half3& color); 279 bool setTransparentRegionHint(const Region& transparent); 280 bool setFlags(uint8_t flags, uint8_t mask); 281 bool setLayerStack(uint32_t layerStack); 282 bool setDataSpace(android_dataspace dataSpace); 283 android_dataspace getDataSpace() const; 284 uint32_t getLayerStack() const; 285 void deferTransactionUntil(const sp<IBinder>& barrierHandle, uint64_t frameNumber); 286 void deferTransactionUntil(const sp<Layer>& barrierLayer, uint64_t frameNumber); 287 bool setOverrideScalingMode(int32_t overrideScalingMode); 288 void setInfo(uint32_t type, uint32_t appId); 289 bool reparentChildren(const sp<IBinder>& layer); 290 bool reparent(const sp<IBinder>& newParentHandle); 291 bool detachChildren(); 292 293 // If we have received a new buffer this frame, we will pass its surface 294 // damage down to hardware composer. Otherwise, we must send a region with 295 // one empty rect. 296 virtual void useSurfaceDamage() = 0; 297 virtual void useEmptyDamage() = 0; 298 299 uint32_t getTransactionFlags(uint32_t flags); 300 uint32_t setTransactionFlags(uint32_t flags); 301 302 bool belongsToDisplay(uint32_t layerStack, bool isPrimaryDisplay) const { 303 return getLayerStack() == layerStack && (!mPrimaryDisplayOnly || isPrimaryDisplay); 304 } 305 306 void computeGeometry(const RenderArea& renderArea, Mesh& mesh, bool useIdentityTransform) const; 307 FloatRect computeBounds(const Region& activeTransparentRegion) const; 308 FloatRect computeBounds() const; 309 310 int32_t getSequence() const { return sequence; } 311 312 // ----------------------------------------------------------------------- 313 // Virtuals 314 virtual const char* getTypeId() const = 0; 315 316 /* 317 * isOpaque - true if this surface is opaque 318 * 319 * This takes into account the buffer format (i.e. whether or not the 320 * pixel format includes an alpha channel) and the "opaque" flag set 321 * on the layer. It does not examine the current plane alpha value. 322 */ 323 virtual bool isOpaque(const Layer::State& s) const = 0; 324 325 /* 326 * isSecure - true if this surface is secure, that is if it prevents 327 * screenshots or VNC servers. 328 */ 329 bool isSecure() const; 330 331 /* 332 * isVisible - true if this layer is visible, false otherwise 333 */ 334 virtual bool isVisible() const = 0; 335 336 /* 337 * isHiddenByPolicy - true if this layer has been forced invisible. 338 * just because this is false, doesn't mean isVisible() is true. 339 * For example if this layer has no active buffer, it may not be hidden by 340 * policy, but it still can not be visible. 341 */ 342 bool isHiddenByPolicy() const; 343 344 /* 345 * isFixedSize - true if content has a fixed size 346 */ 347 virtual bool isFixedSize() const = 0; 348 349 bool isPendingRemoval() const { return mPendingRemoval; } 350 351 void writeToProto(LayerProto* layerInfo, 352 LayerVector::StateSet stateSet = LayerVector::StateSet::Drawing); 353 354protected: 355 /* 356 * onDraw - draws the surface. 357 */ 358 virtual void onDraw(const RenderArea& renderArea, const Region& clip, 359 bool useIdentityTransform) const = 0; 360 361public: 362 virtual void setDefaultBufferSize(uint32_t w, uint32_t h) = 0; 363 364 void setGeometry(const sp<const DisplayDevice>& displayDevice, uint32_t z); 365 void forceClientComposition(int32_t hwcId); 366 bool getForceClientComposition(int32_t hwcId); 367 virtual void setPerFrameData(const sp<const DisplayDevice>& displayDevice) = 0; 368 369 // callIntoHwc exists so we can update our local state and call 370 // acceptDisplayChanges without unnecessarily updating the device's state 371 void setCompositionType(int32_t hwcId, HWC2::Composition type, bool callIntoHwc = true); 372 HWC2::Composition getCompositionType(int32_t hwcId) const; 373 void setClearClientTarget(int32_t hwcId, bool clear); 374 bool getClearClientTarget(int32_t hwcId) const; 375 void updateCursorPosition(const sp<const DisplayDevice>& hw); 376 377 /* 378 * called after page-flip 379 */ 380 virtual void onLayerDisplayed(const sp<Fence>& releaseFence); 381 382 virtual void abandon() = 0; 383 384 virtual bool shouldPresentNow(const DispSync& dispSync) const = 0; 385 virtual void setTransformHint(uint32_t orientation) const = 0; 386 387 /* 388 * called before composition. 389 * returns true if the layer has pending updates. 390 */ 391 virtual bool onPreComposition(nsecs_t refreshStartTime) = 0; 392 393 /* 394 * called after composition. 395 * returns true if the layer latched a new buffer this frame. 396 */ 397 virtual bool onPostComposition(const std::shared_ptr<FenceTime>& glDoneFence, 398 const std::shared_ptr<FenceTime>& presentFence, 399 const CompositorTiming& compositorTiming) = 0; 400 401 // If a buffer was replaced this frame, release the former buffer 402 virtual void releasePendingBuffer(nsecs_t dequeueReadyTime) = 0; 403 404 /* 405 * draw - performs some global clipping optimizations 406 * and calls onDraw(). 407 */ 408 void draw(const RenderArea& renderArea, const Region& clip) const; 409 void draw(const RenderArea& renderArea, bool useIdentityTransform) const; 410 void draw(const RenderArea& renderArea) const; 411 412 /* 413 * doTransaction - process the transaction. This is a good place to figure 414 * out which attributes of the surface have changed. 415 */ 416 uint32_t doTransaction(uint32_t transactionFlags); 417 418 /* 419 * setVisibleRegion - called to set the new visible region. This gives 420 * a chance to update the new visible region or record the fact it changed. 421 */ 422 void setVisibleRegion(const Region& visibleRegion); 423 424 /* 425 * setCoveredRegion - called when the covered region changes. The covered 426 * region corresponds to any area of the surface that is covered 427 * (transparently or not) by another surface. 428 */ 429 void setCoveredRegion(const Region& coveredRegion); 430 431 /* 432 * setVisibleNonTransparentRegion - called when the visible and 433 * non-transparent region changes. 434 */ 435 void setVisibleNonTransparentRegion(const Region& visibleNonTransparentRegion); 436 437 /* 438 * Clear the visible, covered, and non-transparent regions. 439 */ 440 void clearVisibilityRegions(); 441 442 /* 443 * latchBuffer - called each time the screen is redrawn and returns whether 444 * the visible regions need to be recomputed (this is a fairly heavy 445 * operation, so this should be set only if needed). Typically this is used 446 * to figure out if the content or size of a surface has changed. 447 */ 448 virtual Region latchBuffer(bool& recomputeVisibleRegions, nsecs_t latchTime) = 0; 449 virtual bool isBufferLatched() const = 0; 450 451 bool isPotentialCursor() const { return mPotentialCursor; } 452 /* 453 * called with the state lock from a binder thread when the layer is 454 * removed from the current list to the pending removal list 455 */ 456 void onRemovedFromCurrentState(); 457 458 /* 459 * called with the state lock from the main thread when the layer is 460 * removed from the pending removal list 461 */ 462 void onRemoved(); 463 464 // Updates the transform hint in our SurfaceFlingerConsumer to match 465 // the current orientation of the display device. 466 void updateTransformHint(const sp<const DisplayDevice>& hw) const; 467 468 /* 469 * returns the rectangle that crops the content of the layer and scales it 470 * to the layer's size. 471 */ 472 Rect getContentCrop() const; 473 474 /* 475 * Returns if a frame is queued. 476 */ 477 bool hasQueuedFrame() const { 478 return mQueuedFrames > 0 || mSidebandStreamChanged || mAutoRefresh; 479 } 480 481 int32_t getQueuedFrameCount() const { return mQueuedFrames; } 482 483 // ----------------------------------------------------------------------- 484 485 bool createHwcLayer(HWComposer* hwc, int32_t hwcId); 486 bool destroyHwcLayer(int32_t hwcId); 487 void destroyAllHwcLayers(); 488 489 bool hasHwcLayer(int32_t hwcId) { 490 return getBE().mHwcLayers.count(hwcId) > 0; 491 } 492 493 HWC2::Layer* getHwcLayer(int32_t hwcId) { 494 if (getBE().mHwcLayers.count(hwcId) == 0) { 495 return nullptr; 496 } 497 return getBE().mHwcLayers[hwcId].layer; 498 } 499 500 // ----------------------------------------------------------------------- 501 502 void clearWithOpenGL(const RenderArea& renderArea) const; 503 void setFiltering(bool filtering); 504 bool getFiltering() const; 505 506 507 inline const State& getDrawingState() const { return mDrawingState; } 508 inline const State& getCurrentState() const { return mCurrentState; } 509 inline State& getCurrentState() { return mCurrentState; } 510 511 LayerDebugInfo getLayerDebugInfo() const; 512 513 /* always call base class first */ 514 static void miniDumpHeader(String8& result); 515 void miniDump(String8& result, int32_t hwcId) const; 516 void dumpFrameStats(String8& result) const; 517 void dumpFrameEvents(String8& result); 518 void clearFrameStats(); 519 void logFrameStats(); 520 void getFrameStats(FrameStats* outStats) const; 521 522 virtual std::vector<OccupancyTracker::Segment> getOccupancyHistory(bool forceFlush) = 0; 523 524 void onDisconnect(); 525 void addAndGetFrameTimestamps(const NewFrameEventsEntry* newEntry, 526 FrameEventHistoryDelta* outDelta); 527 528 virtual bool getTransformToDisplayInverse() const = 0; 529 530 Transform getTransform() const; 531 532 // Returns the Alpha of the Surface, accounting for the Alpha 533 // of parent Surfaces in the hierarchy (alpha's will be multiplied 534 // down the hierarchy). 535 half getAlpha() const; 536 half4 getColor() const; 537 538 void traverseInReverseZOrder(LayerVector::StateSet stateSet, 539 const LayerVector::Visitor& visitor); 540 void traverseInZOrder(LayerVector::StateSet stateSet, const LayerVector::Visitor& visitor); 541 542 void traverseChildrenInZOrder(LayerVector::StateSet stateSet, 543 const LayerVector::Visitor& visitor); 544 545 size_t getChildrenCount() const; 546 void addChild(const sp<Layer>& layer); 547 // Returns index if removed, or negative value otherwise 548 // for symmetry with Vector::remove 549 ssize_t removeChild(const sp<Layer>& layer); 550 sp<Layer> getParent() const { return mCurrentParent.promote(); } 551 bool hasParent() const { return getParent() != nullptr; } 552 Rect computeScreenBounds(bool reduceTransparentRegion = true) const; 553 bool setChildLayer(const sp<Layer>& childLayer, int32_t z); 554 bool setChildRelativeLayer(const sp<Layer>& childLayer, 555 const sp<IBinder>& relativeToHandle, int32_t relativeZ); 556 557 // Copy the current list of children to the drawing state. Called by 558 // SurfaceFlinger to complete a transaction. 559 void commitChildList(); 560 int32_t getZ() const; 561 562protected: 563 // constant 564 sp<SurfaceFlinger> mFlinger; 565 /* 566 * Trivial class, used to ensure that mFlinger->onLayerDestroyed(mLayer) 567 * is called. 568 */ 569 class LayerCleaner { 570 sp<SurfaceFlinger> mFlinger; 571 wp<Layer> mLayer; 572 573 protected: 574 ~LayerCleaner() { 575 // destroy client resources 576 mFlinger->onLayerDestroyed(mLayer); 577 } 578 579 public: 580 LayerCleaner(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) 581 : mFlinger(flinger), mLayer(layer) {} 582 }; 583 584 virtual void onFirstRef(); 585 586 friend class SurfaceInterceptor; 587 588 void commitTransaction(const State& stateToCommit); 589 590 uint32_t getEffectiveUsage(uint32_t usage) const; 591 592 FloatRect computeCrop(const sp<const DisplayDevice>& hw) const; 593 // Compute the initial crop as specified by parent layers and the 594 // SurfaceControl for this layer. Does not include buffer crop from the 595 // IGraphicBufferProducer client, as that should not affect child clipping. 596 // Returns in screen space. 597 Rect computeInitialCrop(const sp<const DisplayDevice>& hw) const; 598 599 // drawing 600 void clearWithOpenGL(const RenderArea& renderArea, float r, float g, float b, 601 float alpha) const; 602 603 void setParent(const sp<Layer>& layer); 604 605 LayerVector makeTraversalList(LayerVector::StateSet stateSet, bool* outSkipRelativeZUsers); 606 void addZOrderRelative(const wp<Layer>& relative); 607 void removeZOrderRelative(const wp<Layer>& relative); 608 609 class SyncPoint { 610 public: 611 explicit SyncPoint(uint64_t frameNumber) 612 : mFrameNumber(frameNumber), mFrameIsAvailable(false), mTransactionIsApplied(false) {} 613 614 uint64_t getFrameNumber() const { return mFrameNumber; } 615 616 bool frameIsAvailable() const { return mFrameIsAvailable; } 617 618 void setFrameAvailable() { mFrameIsAvailable = true; } 619 620 bool transactionIsApplied() const { return mTransactionIsApplied; } 621 622 void setTransactionApplied() { mTransactionIsApplied = true; } 623 624 private: 625 const uint64_t mFrameNumber; 626 std::atomic<bool> mFrameIsAvailable; 627 std::atomic<bool> mTransactionIsApplied; 628 }; 629 630 // SyncPoints which will be signaled when the correct frame is at the head 631 // of the queue and dropped after the frame has been latched. Protected by 632 // mLocalSyncPointMutex. 633 Mutex mLocalSyncPointMutex; 634 std::list<std::shared_ptr<SyncPoint>> mLocalSyncPoints; 635 636 // SyncPoints which will be signaled and then dropped when the transaction 637 // is applied 638 std::list<std::shared_ptr<SyncPoint>> mRemoteSyncPoints; 639 640 // Returns false if the relevant frame has already been latched 641 bool addSyncPoint(const std::shared_ptr<SyncPoint>& point); 642 643 void pushPendingState(); 644 void popPendingState(State* stateToCommit); 645 bool applyPendingStates(State* stateToCommit); 646 647 void clearSyncPoints(); 648 649 // Returns mCurrentScaling mode (originating from the 650 // Client) or mOverrideScalingMode mode (originating from 651 // the Surface Controller) if set. 652 virtual uint32_t getEffectiveScalingMode() const = 0; 653 654public: 655 /* 656 * The layer handle is just a BBinder object passed to the client 657 * (remote process) -- we don't keep any reference on our side such that 658 * the dtor is called when the remote side let go of its reference. 659 * 660 * LayerCleaner ensures that mFlinger->onLayerDestroyed() is called for 661 * this layer when the handle is destroyed. 662 */ 663 class Handle : public BBinder, public LayerCleaner { 664 public: 665 Handle(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) 666 : LayerCleaner(flinger, layer), owner(layer) {} 667 668 wp<Layer> owner; 669 }; 670 671 sp<IBinder> getHandle(); 672 const String8& getName() const; 673 virtual void notifyAvailableFrames() = 0; 674 virtual PixelFormat getPixelFormat() const = 0; 675 bool getPremultipledAlpha() const; 676 677protected: 678 // ----------------------------------------------------------------------- 679 bool usingRelativeZ(LayerVector::StateSet stateSet); 680 681 bool mPremultipliedAlpha; 682 String8 mName; 683 String8 mTransactionName; // A cached version of "TX - " + mName for systraces 684 685 bool mPrimaryDisplayOnly = false; 686 687 // these are protected by an external lock 688 State mCurrentState; 689 State mDrawingState; 690 volatile int32_t mTransactionFlags; 691 692 // Accessed from main thread and binder threads 693 Mutex mPendingStateMutex; 694 Vector<State> mPendingStates; 695 696 // thread-safe 697 volatile int32_t mQueuedFrames; 698 volatile int32_t mSidebandStreamChanged; // used like an atomic boolean 699 700 // Timestamp history for UIAutomation. Thread safe. 701 FrameTracker mFrameTracker; 702 703 // Timestamp history for the consumer to query. 704 // Accessed by both consumer and producer on main and binder threads. 705 Mutex mFrameEventHistoryMutex; 706 ConsumerFrameEventHistory mFrameEventHistory; 707 FenceTimeline mAcquireTimeline; 708 FenceTimeline mReleaseTimeline; 709 710 // main thread 711 int mActiveBufferSlot; 712 sp<GraphicBuffer> mActiveBuffer; 713 sp<NativeHandle> mSidebandStream; 714 Rect mCurrentCrop; 715 uint32_t mCurrentTransform; 716 // We encode unset as -1. 717 int32_t mOverrideScalingMode; 718 bool mCurrentOpacity; 719 std::atomic<uint64_t> mCurrentFrameNumber; 720 bool mFrameLatencyNeeded; 721 // Whether filtering is forced on or not 722 bool mFiltering; 723 // Whether filtering is needed b/c of the drawingstate 724 bool mNeedsFiltering; 725 726 bool mPendingRemoval = false; 727 728 // page-flip thread (currently main thread) 729 bool mProtectedByApp; // application requires protected path to external sink 730 731 // protected by mLock 732 mutable Mutex mLock; 733 734 const wp<Client> mClientRef; 735 736 // This layer can be a cursor on some displays. 737 bool mPotentialCursor; 738 739 // Local copy of the queued contents of the incoming BufferQueue 740 mutable Mutex mQueueItemLock; 741 Condition mQueueItemCondition; 742 Vector<BufferItem> mQueueItems; 743 std::atomic<uint64_t> mLastFrameNumberReceived; 744 bool mAutoRefresh; 745 bool mFreezeGeometryUpdates; 746 747 // Child list about to be committed/used for editing. 748 LayerVector mCurrentChildren; 749 // Child list used for rendering. 750 LayerVector mDrawingChildren; 751 752 wp<Layer> mCurrentParent; 753 wp<Layer> mDrawingParent; 754 755 mutable LayerBE mBE; 756}; 757 758// --------------------------------------------------------------------------- 759 760}; // namespace android 761 762#endif // ANDROID_LAYER_H 763