SurfaceFlinger.h revision cbf153bedf2eafc1443bbc97c4e74f97e7973edd 
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_SURFACE_FLINGER_H
18#define ANDROID_SURFACE_FLINGER_H
19
20#include <memory>
21#include <stdint.h>
22#include <sys/types.h>
23
24#include <EGL/egl.h>
25
26/*
27 * NOTE: Make sure this file doesn't include  anything from <gl/ > or <gl2/ >
28 */
29
30#include <cutils/compiler.h>
31
32#include <utils/Atomic.h>
33#include <utils/Errors.h>
34#include <utils/KeyedVector.h>
35#include <utils/RefBase.h>
36#include <utils/SortedVector.h>
37#include <utils/threads.h>
38
39#include <ui/FenceTime.h>
40#include <ui/PixelFormat.h>
41#include <math/mat4.h>
42
43#include <gui/FrameTimestamps.h>
44#include <gui/ISurfaceComposer.h>
45#include <gui/ISurfaceComposerClient.h>
46#include <gui/OccupancyTracker.h>
47
48#include <hardware/hwcomposer_defs.h>
49
50#include <system/graphics.h>
51
52#include <private/gui/LayerState.h>
53
54#include "Barrier.h"
55#include "DisplayDevice.h"
56#include "DispSync.h"
57#include "FrameTracker.h"
58#include "LayerVector.h"
59#include "MessageQueue.h"
60#include "SurfaceInterceptor.h"
61#include "StartBootAnimThread.h"
62
63#include "DisplayHardware/HWComposer.h"
64#include "Effects/Daltonizer.h"
65
66#include <map>
67#include <mutex>
68#include <queue>
69#include <string>
70#include <utility>
71
72namespace android {
73
74// ---------------------------------------------------------------------------
75
76class Client;
77class DisplayEventConnection;
78class EventThread;
79class IGraphicBufferAlloc;
80class Layer;
81class LayerDim;
82class Surface;
83class RenderEngine;
84class EventControlThread;
85class VSyncSource;
86class InjectVSyncSource;
87class VrStateCallbacks;
88
89namespace dvr {
90class VrFlinger;
91} // namespace dvr
92
93// ---------------------------------------------------------------------------
94
95enum {
96    eTransactionNeeded        = 0x01,
97    eTraversalNeeded          = 0x02,
98    eDisplayTransactionNeeded = 0x04,
99    eTransactionMask          = 0x07
100};
101
102class SurfaceFlinger : public BnSurfaceComposer,
103                       private IBinder::DeathRecipient,
104                       private HWComposer::EventHandler
105{
106public:
107
108    // This is the phase offset in nanoseconds of the software vsync event
109    // relative to the vsync event reported by HWComposer.  The software vsync
110    // event is when SurfaceFlinger and Choreographer-based applications run each
111    // frame.
112    //
113    // This phase offset allows adjustment of the minimum latency from application
114    // wake-up time (by Choreographer) to the time at which the resulting window
115    // image is displayed.  This value may be either positive (after the HW vsync)
116    // or negative (before the HW vsync). Setting it to 0 will result in a lower
117    // latency bound of two vsync periods because the app and SurfaceFlinger
118    // will run just after the HW vsync.  Setting it to a positive number will
119    // result in the minimum latency being:
120    //
121    //     (2 * VSYNC_PERIOD - (vsyncPhaseOffsetNs % VSYNC_PERIOD))
122    //
123    // Note that reducing this latency makes it more likely for the applications
124    // to not have their window content image ready in time.  When this happens
125    // the latency will end up being an additional vsync period, and animations
126    // will hiccup.  Therefore, this latency should be tuned somewhat
127    // conservatively (or at least with awareness of the trade-off being made).
128    static int64_t vsyncPhaseOffsetNs;
129    static int64_t sfVsyncPhaseOffsetNs;
130
131    // If fences from sync Framework are supported.
132    static bool hasSyncFramework;
133
134    // Instruct the Render Engine to use EGL_IMG_context_priority is available.
135    static bool useContextPriority;
136
137    // The offset in nanoseconds to use when DispSync timestamps present fence
138    // signaling time.
139    static int64_t dispSyncPresentTimeOffset;
140
141    // Some hardware can do RGB->YUV conversion more efficiently in hardware
142    // controlled by HWC than in hardware controlled by the video encoder.
143    // This instruct VirtualDisplaySurface to use HWC for such conversion on
144    // GL composition.
145    static bool useHwcForRgbToYuv;
146
147    // Maximum dimension supported by HWC for virtual display.
148    // Equal to min(max_height, max_width).
149    static uint64_t maxVirtualDisplaySize;
150
151    static char const* getServiceName() ANDROID_API {
152        return "SurfaceFlinger";
153    }
154
155    SurfaceFlinger() ANDROID_API;
156
157    // must be called before clients can connect
158    void init() ANDROID_API;
159
160    // starts SurfaceFlinger main loop in the current thread
161    void run() ANDROID_API;
162
163    enum {
164        EVENT_VSYNC = HWC_EVENT_VSYNC
165    };
166
167    // post an asynchronous message to the main thread
168    status_t postMessageAsync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0);
169
170    // post a synchronous message to the main thread
171    status_t postMessageSync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0);
172
173    // force full composition on all displays
174    void repaintEverything();
175
176    // returns the default Display
177    sp<const DisplayDevice> getDefaultDisplayDevice() const {
178        return getDisplayDevice(mBuiltinDisplays[DisplayDevice::DISPLAY_PRIMARY]);
179    }
180
181    // utility function to delete a texture on the main thread
182    void deleteTextureAsync(uint32_t texture);
183
184    // enable/disable h/w composer event
185    // TODO: this should be made accessible only to EventThread
186#ifdef USE_HWC2
187    void setVsyncEnabled(int disp, int enabled);
188#else
189    void eventControl(int disp, int event, int enabled);
190#endif
191
192    // called on the main thread by MessageQueue when an internal message
193    // is received
194    // TODO: this should be made accessible only to MessageQueue
195    void onMessageReceived(int32_t what);
196
197    // for debugging only
198    // TODO: this should be made accessible only to HWComposer
199    const Vector< sp<Layer> >& getLayerSortedByZForHwcDisplay(int id);
200
201    RenderEngine& getRenderEngine() const {
202        return *mRenderEngine;
203    }
204
205    bool authenticateSurfaceTextureLocked(
206        const sp<IGraphicBufferProducer>& bufferProducer) const;
207
208private:
209    friend class Client;
210    friend class DisplayEventConnection;
211    friend class EventThread;
212    friend class Layer;
213    friend class MonitoredProducer;
214    friend class VrStateCallbacks;
215
216    // This value is specified in number of frames.  Log frame stats at most
217    // every half hour.
218    enum { LOG_FRAME_STATS_PERIOD =  30*60*60 };
219
220    static const size_t MAX_LAYERS = 4096;
221
222    // We're reference counted, never destroy SurfaceFlinger directly
223    virtual ~SurfaceFlinger();
224
225    /* ------------------------------------------------------------------------
226     * Internal data structures
227     */
228
229    class State {
230    public:
231        LayerVector layersSortedByZ;
232        DefaultKeyedVector< wp<IBinder>, DisplayDeviceState> displays;
233
234        void traverseInZOrder(const std::function<void(Layer*)>& consume) const;
235        void traverseInReverseZOrder(const std::function<void(Layer*)>& consume) const;
236    };
237
238    /* ------------------------------------------------------------------------
239     * IBinder interface
240     */
241    virtual status_t onTransact(uint32_t code, const Parcel& data,
242        Parcel* reply, uint32_t flags);
243    virtual status_t dump(int fd, const Vector<String16>& args);
244
245    /* ------------------------------------------------------------------------
246     * ISurfaceComposer interface
247     */
248    virtual sp<ISurfaceComposerClient> createConnection();
249    virtual sp<ISurfaceComposerClient> createScopedConnection(const sp<IGraphicBufferProducer>& gbp);
250    virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc();
251    virtual sp<IBinder> createDisplay(const String8& displayName, bool secure);
252    virtual void destroyDisplay(const sp<IBinder>& display);
253    virtual sp<IBinder> getBuiltInDisplay(int32_t id);
254    virtual void setTransactionState(const Vector<ComposerState>& state,
255            const Vector<DisplayState>& displays, uint32_t flags);
256    virtual void bootFinished();
257    virtual bool authenticateSurfaceTexture(
258        const sp<IGraphicBufferProducer>& bufferProducer) const;
259    virtual status_t getSupportedFrameTimestamps(
260            std::vector<FrameEvent>* outSupported) const;
261    virtual sp<IDisplayEventConnection> createDisplayEventConnection();
262    virtual status_t captureScreen(const sp<IBinder>& display,
263            const sp<IGraphicBufferProducer>& producer,
264            Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
265            int32_t minLayerZ, int32_t maxLayerZ,
266            bool useIdentityTransform, ISurfaceComposer::Rotation rotation);
267    virtual status_t getDisplayStats(const sp<IBinder>& display,
268            DisplayStatInfo* stats);
269    virtual status_t getDisplayConfigs(const sp<IBinder>& display,
270            Vector<DisplayInfo>* configs);
271    virtual int getActiveConfig(const sp<IBinder>& display);
272    virtual status_t getDisplayColorModes(const sp<IBinder>& display,
273            Vector<android_color_mode_t>* configs);
274    virtual android_color_mode_t getActiveColorMode(const sp<IBinder>& display);
275    virtual status_t setActiveColorMode(const sp<IBinder>& display, android_color_mode_t colorMode);
276    virtual void setPowerMode(const sp<IBinder>& display, int mode);
277    virtual status_t setActiveConfig(const sp<IBinder>& display, int id);
278    virtual status_t clearAnimationFrameStats();
279    virtual status_t getAnimationFrameStats(FrameStats* outStats) const;
280    virtual status_t getHdrCapabilities(const sp<IBinder>& display,
281            HdrCapabilities* outCapabilities) const;
282    virtual status_t enableVSyncInjections(bool enable);
283    virtual status_t injectVSync(nsecs_t when);
284
285
286    /* ------------------------------------------------------------------------
287     * DeathRecipient interface
288     */
289    virtual void binderDied(const wp<IBinder>& who);
290
291    /* ------------------------------------------------------------------------
292     * RefBase interface
293     */
294    virtual void onFirstRef();
295
296    /* ------------------------------------------------------------------------
297     * HWComposer::EventHandler interface
298     */
299    virtual void onVSyncReceived(HWComposer* composer, int type, nsecs_t timestamp);
300    virtual void onHotplugReceived(int disp, bool connected);
301    virtual void onInvalidateReceived(HWComposer* composer);
302
303    /* ------------------------------------------------------------------------
304     * Message handling
305     */
306    void waitForEvent();
307    void signalTransaction();
308    void signalLayerUpdate();
309    void signalRefresh();
310
311    // called on the main thread in response to initializeDisplays()
312    void onInitializeDisplays();
313    // called on the main thread in response to setActiveConfig()
314    void setActiveConfigInternal(const sp<DisplayDevice>& hw, int mode);
315    // called on the main thread in response to setPowerMode()
316    void setPowerModeInternal(const sp<DisplayDevice>& hw, int mode);
317
318    // Called on the main thread in response to setActiveColorMode()
319    void setActiveColorModeInternal(const sp<DisplayDevice>& hw, android_color_mode_t colorMode);
320
321    // Returns whether the transaction actually modified any state
322    bool handleMessageTransaction();
323
324    // Returns whether a new buffer has been latched (see handlePageFlip())
325    bool handleMessageInvalidate();
326
327    void handleMessageRefresh();
328
329    void handleTransaction(uint32_t transactionFlags);
330    void handleTransactionLocked(uint32_t transactionFlags);
331
332    void updateCursorAsync();
333
334    /* handlePageFlip - latch a new buffer if available and compute the dirty
335     * region. Returns whether a new buffer has been latched, i.e., whether it
336     * is necessary to perform a refresh during this vsync.
337     */
338    bool handlePageFlip();
339
340    /* ------------------------------------------------------------------------
341     * Transactions
342     */
343    uint32_t getTransactionFlags(uint32_t flags);
344    uint32_t peekTransactionFlags();
345    uint32_t setTransactionFlags(uint32_t flags);
346    void commitTransaction();
347    uint32_t setClientStateLocked(const sp<Client>& client, const layer_state_t& s);
348    uint32_t setDisplayStateLocked(const DisplayState& s);
349
350    /* ------------------------------------------------------------------------
351     * Layer management
352     */
353    status_t createLayer(const String8& name, const sp<Client>& client,
354            uint32_t w, uint32_t h, PixelFormat format, uint32_t flags,
355            uint32_t windowType, uint32_t ownerUid, sp<IBinder>* handle,
356            sp<IGraphicBufferProducer>* gbp, sp<Layer>* parent);
357
358    status_t createNormalLayer(const sp<Client>& client, const String8& name,
359            uint32_t w, uint32_t h, uint32_t flags, PixelFormat& format,
360            sp<IBinder>* outHandle, sp<IGraphicBufferProducer>* outGbp,
361            sp<Layer>* outLayer);
362
363    status_t createDimLayer(const sp<Client>& client, const String8& name,
364            uint32_t w, uint32_t h, uint32_t flags, sp<IBinder>* outHandle,
365            sp<IGraphicBufferProducer>* outGbp, sp<Layer>* outLayer);
366
367    // called in response to the window-manager calling
368    // ISurfaceComposerClient::destroySurface()
369    status_t onLayerRemoved(const sp<Client>& client, const sp<IBinder>& handle);
370
371    // called when all clients have released all their references to
372    // this layer meaning it is entirely safe to destroy all
373    // resources associated to this layer.
374    status_t onLayerDestroyed(const wp<Layer>& layer);
375
376    // remove a layer from SurfaceFlinger immediately
377    status_t removeLayer(const sp<Layer>& layer);
378
379    // add a layer to SurfaceFlinger
380    status_t addClientLayer(const sp<Client>& client,
381            const sp<IBinder>& handle,
382            const sp<IGraphicBufferProducer>& gbc,
383            const sp<Layer>& lbc,
384            const sp<Layer>& parent);
385
386    /* ------------------------------------------------------------------------
387     * Boot animation, on/off animations and screen capture
388     */
389
390    void startBootAnim();
391
392    void renderScreenImplLocked(
393            const sp<const DisplayDevice>& hw,
394            Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
395            int32_t minLayerZ, int32_t maxLayerZ,
396            bool yswap, bool useIdentityTransform, Transform::orientation_flags rotation);
397
398    status_t captureScreenImplLocked(
399            const sp<const DisplayDevice>& hw,
400            const sp<IGraphicBufferProducer>& producer,
401            Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
402            int32_t minLayerZ, int32_t maxLayerZ,
403            bool useIdentityTransform, Transform::orientation_flags rotation,
404            bool isLocalScreenshot);
405
406    sp<StartBootAnimThread> mStartBootAnimThread = nullptr;
407
408    /* ------------------------------------------------------------------------
409     * EGL
410     */
411    size_t getMaxTextureSize() const;
412    size_t getMaxViewportDims() const;
413
414    /* ------------------------------------------------------------------------
415     * Display and layer stack management
416     */
417    // called when starting, or restarting after system_server death
418    void initializeDisplays();
419
420    // Create an IBinder for a builtin display and add it to current state
421    void createBuiltinDisplayLocked(DisplayDevice::DisplayType type);
422
423    // NOTE: can only be called from the main thread or with mStateLock held
424    sp<const DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) const {
425        return mDisplays.valueFor(dpy);
426    }
427
428    // NOTE: can only be called from the main thread or with mStateLock held
429    sp<DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) {
430        return mDisplays.valueFor(dpy);
431    }
432
433    int32_t getDisplayType(const sp<IBinder>& display) {
434        if (!display.get()) return NAME_NOT_FOUND;
435        for (int i = 0; i < DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES; ++i) {
436            if (display == mBuiltinDisplays[i]) {
437                return i;
438            }
439        }
440        return NAME_NOT_FOUND;
441    }
442
443    // mark a region of a layer stack dirty. this updates the dirty
444    // region of all screens presenting this layer stack.
445    void invalidateLayerStack(uint32_t layerStack, const Region& dirty);
446
447#ifndef USE_HWC2
448    int32_t allocateHwcDisplayId(DisplayDevice::DisplayType type);
449#endif
450
451    /* ------------------------------------------------------------------------
452     * H/W composer
453     */
454
455    HWComposer& getHwComposer() const { return *mHwc; }
456
457    /* ------------------------------------------------------------------------
458     * Compositing
459     */
460    void invalidateHwcGeometry();
461    void computeVisibleRegions(uint32_t layerStack,
462            Region& dirtyRegion, Region& opaqueRegion);
463
464    void preComposition(nsecs_t refreshStartTime);
465    void postComposition(nsecs_t refreshStartTime);
466    void updateCompositorTiming(
467            nsecs_t vsyncPhase, nsecs_t vsyncInterval, nsecs_t compositeTime,
468            std::shared_ptr<FenceTime>& presentFenceTime);
469    void rebuildLayerStacks();
470    void setUpHWComposer();
471    void doComposition();
472    void doDebugFlashRegions();
473    void doDisplayComposition(const sp<const DisplayDevice>& displayDevice, const Region& dirtyRegion);
474
475    // compose surfaces for display hw. this fails if using GL and the surface
476    // has been destroyed and is no longer valid.
477    bool doComposeSurfaces(const sp<const DisplayDevice>& displayDevice, const Region& dirty);
478
479    void postFramebuffer();
480    void drawWormhole(const sp<const DisplayDevice>& displayDevice, const Region& region) const;
481
482    /* ------------------------------------------------------------------------
483     * Display management
484     */
485
486    /* ------------------------------------------------------------------------
487     * VSync
488     */
489    void enableHardwareVsync();
490    void resyncToHardwareVsync(bool makeAvailable);
491    void disableHardwareVsync(bool makeUnavailable);
492
493public:
494    void resyncWithRateLimit();
495    void getCompositorTiming(CompositorTiming* compositorTiming);
496private:
497
498    /* ------------------------------------------------------------------------
499     * Debugging & dumpsys
500     */
501    void listLayersLocked(const Vector<String16>& args, size_t& index, String8& result) const;
502    void dumpStatsLocked(const Vector<String16>& args, size_t& index, String8& result) const;
503    void clearStatsLocked(const Vector<String16>& args, size_t& index, String8& result);
504    void dumpAllLocked(const Vector<String16>& args, size_t& index, String8& result) const;
505    bool startDdmConnection();
506    void appendSfConfigString(String8& result) const;
507    void checkScreenshot(size_t w, size_t s, size_t h, void const* vaddr,
508            const sp<const DisplayDevice>& hw,
509            int32_t minLayerZ, int32_t maxLayerZ);
510
511    void logFrameStats();
512
513    void dumpStaticScreenStats(String8& result) const;
514    // Not const because each Layer needs to query Fences and cache timestamps.
515    void dumpFrameEventsLocked(String8& result);
516
517    void recordBufferingStats(const char* layerName,
518            std::vector<OccupancyTracker::Segment>&& history);
519    void dumpBufferingStats(String8& result) const;
520
521    bool isLayerTripleBufferingDisabled() const {
522        return this->mLayerTripleBufferingDisabled;
523    }
524
525#ifdef USE_HWC2
526    /* ------------------------------------------------------------------------
527     * VrFlinger
528     */
529    void clearHwcLayers(const LayerVector& layers);
530    void resetHwc();
531
532    // Check to see if we should change to or from vr mode, and if so, perform
533    // the handoff.
534    void updateVrMode();
535#endif
536
537    /* ------------------------------------------------------------------------
538     * Attributes
539     */
540
541    // access must be protected by mStateLock
542    mutable Mutex mStateLock;
543    State mCurrentState;
544    volatile int32_t mTransactionFlags;
545    Condition mTransactionCV;
546    bool mTransactionPending;
547    bool mAnimTransactionPending;
548    SortedVector< sp<Layer> > mLayersPendingRemoval;
549    SortedVector< wp<IBinder> > mGraphicBufferProducerList;
550
551    // protected by mStateLock (but we could use another lock)
552    bool mLayersRemoved;
553    bool mLayersAdded;
554
555    // access must be protected by mInvalidateLock
556    volatile int32_t mRepaintEverything;
557
558    // current, real and vr hardware composers.
559    HWComposer* mHwc;
560#ifdef USE_HWC2
561    HWComposer* mRealHwc;
562    HWComposer* mVrHwc;
563#endif
564    // constant members (no synchronization needed for access)
565    RenderEngine* mRenderEngine;
566    nsecs_t mBootTime;
567    bool mGpuToCpuSupported;
568    sp<EventThread> mEventThread;
569    sp<EventThread> mSFEventThread;
570    sp<EventThread> mInjectorEventThread;
571    sp<InjectVSyncSource> mVSyncInjector;
572    sp<EventControlThread> mEventControlThread;
573    EGLContext mEGLContext;
574    EGLDisplay mEGLDisplay;
575    sp<IBinder> mBuiltinDisplays[DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES];
576
577#ifdef USE_HWC2
578    std::unique_ptr<dvr::VrFlinger> mVrFlinger;
579#endif
580
581    // Can only accessed from the main thread, these members
582    // don't need synchronization
583    State mDrawingState;
584    bool mVisibleRegionsDirty;
585#ifndef USE_HWC2
586    bool mHwWorkListDirty;
587#else
588    bool mGeometryInvalid;
589#endif
590    bool mAnimCompositionPending;
591#ifdef USE_HWC2
592    std::vector<sp<Layer>> mLayersWithQueuedFrames;
593    sp<Fence> mPreviousPresentFence = Fence::NO_FENCE;
594    bool mHadClientComposition = false;
595#endif
596    FenceTimeline mGlCompositionDoneTimeline;
597    FenceTimeline mDisplayTimeline;
598
599    // this may only be written from the main thread with mStateLock held
600    // it may be read from other threads with mStateLock held
601    DefaultKeyedVector< wp<IBinder>, sp<DisplayDevice> > mDisplays;
602
603    // don't use a lock for these, we don't care
604    int mVrModeSupported;
605    int mDebugRegion;
606    int mDebugDDMS;
607    int mDebugDisableHWC;
608    int mDebugDisableTransformHint;
609    volatile nsecs_t mDebugInSwapBuffers;
610    nsecs_t mLastSwapBufferTime;
611    volatile nsecs_t mDebugInTransaction;
612    nsecs_t mLastTransactionTime;
613    bool mBootFinished;
614    bool mForceFullDamage;
615#ifdef USE_HWC2
616    bool mPropagateBackpressure = true;
617#endif
618    SurfaceInterceptor mInterceptor;
619    bool mUseHwcVirtualDisplays = false;
620
621    // Restrict layers to use two buffers in their bufferqueues.
622    bool mLayerTripleBufferingDisabled = false;
623
624    // these are thread safe
625    mutable MessageQueue mEventQueue;
626    FrameTracker mAnimFrameTracker;
627    DispSync mPrimaryDispSync;
628
629    // protected by mDestroyedLayerLock;
630    mutable Mutex mDestroyedLayerLock;
631    Vector<Layer const *> mDestroyedLayers;
632
633    // protected by mHWVsyncLock
634    Mutex mHWVsyncLock;
635    bool mPrimaryHWVsyncEnabled;
636    bool mHWVsyncAvailable;
637
638    // protected by mCompositorTimingLock;
639    mutable std::mutex mCompositeTimingLock;
640    CompositorTiming mCompositorTiming;
641
642    // Only accessed from the main thread.
643    struct CompositePresentTime {
644        nsecs_t composite { -1 };
645        std::shared_ptr<FenceTime> display { FenceTime::NO_FENCE };
646    };
647    std::queue<CompositePresentTime> mCompositePresentTimes;
648
649    /* ------------------------------------------------------------------------
650     * Feature prototyping
651     */
652
653    bool mInjectVSyncs;
654
655    Daltonizer mDaltonizer;
656#ifndef USE_HWC2
657    bool mDaltonize;
658#endif
659
660    mat4 mPreviousColorMatrix;
661    mat4 mColorMatrix;
662    bool mHasColorMatrix;
663
664    // Static screen stats
665    bool mHasPoweredOff;
666    static const size_t NUM_BUCKETS = 8; // < 1-7, 7+
667    nsecs_t mFrameBuckets[NUM_BUCKETS];
668    nsecs_t mTotalTime;
669    std::atomic<nsecs_t> mLastSwapTime;
670
671    size_t mNumLayers;
672
673    // Double- vs. triple-buffering stats
674    struct BufferingStats {
675        BufferingStats()
676          : numSegments(0),
677            totalTime(0),
678            twoBufferTime(0),
679            doubleBufferedTime(0),
680            tripleBufferedTime(0) {}
681
682        size_t numSegments;
683        nsecs_t totalTime;
684
685        // "Two buffer" means that a third buffer was never used, whereas
686        // "double-buffered" means that on average the segment only used two
687        // buffers (though it may have used a third for some part of the
688        // segment)
689        nsecs_t twoBufferTime;
690        nsecs_t doubleBufferedTime;
691        nsecs_t tripleBufferedTime;
692    };
693    mutable Mutex mBufferingStatsMutex;
694    std::unordered_map<std::string, BufferingStats> mBufferingStats;
695
696    // Verify that transaction is being called by an approved process:
697    // either AID_GRAPHICS or AID_SYSTEM.
698    status_t CheckTransactCodeCredentials(uint32_t code);
699
700#ifdef USE_HWC2
701    sp<VrStateCallbacks> mVrStateCallbacks;
702
703    std::atomic<bool> mEnterVrMode;
704#endif
705    };
706}; // namespace android
707
708#endif // ANDROID_SURFACE_FLINGER_H
709