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#define LOG_TAG "SurfaceComposerClient"
18
19#include <stdint.h>
20#include <sys/types.h>
21
22#include <utils/Errors.h>
23#include <utils/Log.h>
24#include <utils/Singleton.h>
25#include <utils/SortedVector.h>
26#include <utils/String8.h>
27#include <utils/threads.h>
28
29#include <binder/IServiceManager.h>
30
31#include <system/graphics.h>
32
33#include <ui/DisplayInfo.h>
34
35#include <gui/BufferItemConsumer.h>
36#include <gui/CpuConsumer.h>
37#include <gui/IGraphicBufferProducer.h>
38#include <gui/ISurfaceComposer.h>
39#include <gui/ISurfaceComposerClient.h>
40#include <gui/Surface.h>
41#include <gui/SurfaceComposerClient.h>
42
43#include <private/gui/ComposerService.h>
44#include <private/gui/LayerState.h>
45
46namespace android {
47// ---------------------------------------------------------------------------
48
49ANDROID_SINGLETON_STATIC_INSTANCE(ComposerService);
50
51ComposerService::ComposerService()
52: Singleton<ComposerService>() {
53    Mutex::Autolock _l(mLock);
54    connectLocked();
55}
56
57void ComposerService::connectLocked() {
58    const String16 name("SurfaceFlinger");
59    while (getService(name, &mComposerService) != NO_ERROR) {
60        usleep(250000);
61    }
62    assert(mComposerService != NULL);
63
64    // Create the death listener.
65    class DeathObserver : public IBinder::DeathRecipient {
66        ComposerService& mComposerService;
67        virtual void binderDied(const wp<IBinder>& who) {
68            ALOGW("ComposerService remote (surfaceflinger) died [%p]",
69                  who.unsafe_get());
70            mComposerService.composerServiceDied();
71        }
72     public:
73        explicit DeathObserver(ComposerService& mgr) : mComposerService(mgr) { }
74    };
75
76    mDeathObserver = new DeathObserver(*const_cast<ComposerService*>(this));
77    IInterface::asBinder(mComposerService)->linkToDeath(mDeathObserver);
78}
79
80/*static*/ sp<ISurfaceComposer> ComposerService::getComposerService() {
81    ComposerService& instance = ComposerService::getInstance();
82    Mutex::Autolock _l(instance.mLock);
83    if (instance.mComposerService == NULL) {
84        ComposerService::getInstance().connectLocked();
85        assert(instance.mComposerService != NULL);
86        ALOGD("ComposerService reconnected");
87    }
88    return instance.mComposerService;
89}
90
91void ComposerService::composerServiceDied()
92{
93    Mutex::Autolock _l(mLock);
94    mComposerService = NULL;
95    mDeathObserver = NULL;
96}
97
98// ---------------------------------------------------------------------------
99
100static inline
101int compare_type(const ComposerState& lhs, const ComposerState& rhs) {
102    if (lhs.client < rhs.client)  return -1;
103    if (lhs.client > rhs.client)  return 1;
104    if (lhs.state.surface < rhs.state.surface)  return -1;
105    if (lhs.state.surface > rhs.state.surface)  return 1;
106    return 0;
107}
108
109static inline
110int compare_type(const DisplayState& lhs, const DisplayState& rhs) {
111    return compare_type(lhs.token, rhs.token);
112}
113
114class Composer : public Singleton<Composer>
115{
116    friend class Singleton<Composer>;
117
118    mutable Mutex               mLock;
119    SortedVector<ComposerState> mComposerStates;
120    SortedVector<DisplayState > mDisplayStates;
121    uint32_t                    mForceSynchronous;
122    uint32_t                    mTransactionNestCount;
123    bool                        mAnimation;
124
125    Composer() : Singleton<Composer>(),
126        mForceSynchronous(0), mTransactionNestCount(0),
127        mAnimation(false)
128    { }
129
130    void openGlobalTransactionImpl();
131    void closeGlobalTransactionImpl(bool synchronous);
132    void setAnimationTransactionImpl();
133    status_t enableVSyncInjectionsImpl(bool enable);
134    status_t injectVSyncImpl(nsecs_t when);
135
136    layer_state_t* getLayerStateLocked(
137            const sp<SurfaceComposerClient>& client, const sp<IBinder>& id);
138
139    DisplayState& getDisplayStateLocked(const sp<IBinder>& token);
140
141public:
142    sp<IBinder> createDisplay(const String8& displayName, bool secure);
143    void destroyDisplay(const sp<IBinder>& display);
144    sp<IBinder> getBuiltInDisplay(int32_t id);
145
146    status_t setPosition(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
147            float x, float y);
148    status_t setSize(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
149            uint32_t w, uint32_t h);
150    status_t setLayer(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
151            int32_t z);
152    status_t setRelativeLayer(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
153            const sp<IBinder>& relativeTo, int32_t z);
154    status_t setFlags(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
155            uint32_t flags, uint32_t mask);
156    status_t setTransparentRegionHint(
157            const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
158            const Region& transparentRegion);
159    status_t setAlpha(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
160            float alpha);
161    status_t setMatrix(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
162            float dsdx, float dtdx, float dtdy, float dsdy);
163    status_t setOrientation(int orientation);
164    status_t setCrop(const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
165            const Rect& crop);
166    status_t setFinalCrop(const sp<SurfaceComposerClient>& client,
167            const sp<IBinder>& id, const Rect& crop);
168    status_t setLayerStack(const sp<SurfaceComposerClient>& client,
169            const sp<IBinder>& id, uint32_t layerStack);
170    status_t deferTransactionUntil(const sp<SurfaceComposerClient>& client,
171            const sp<IBinder>& id, const sp<IBinder>& handle,
172            uint64_t frameNumber);
173    status_t deferTransactionUntil(const sp<SurfaceComposerClient>& client,
174            const sp<IBinder>& id, const sp<Surface>& barrierSurface,
175            uint64_t frameNumber);
176    status_t reparentChildren(const sp<SurfaceComposerClient>& client,
177            const sp<IBinder>& id,
178            const sp<IBinder>& newParentHandle);
179    status_t detachChildren(const sp<SurfaceComposerClient>& client,
180            const sp<IBinder>& id);
181    status_t setOverrideScalingMode(const sp<SurfaceComposerClient>& client,
182            const sp<IBinder>& id, int32_t overrideScalingMode);
183    status_t setGeometryAppliesWithResize(const sp<SurfaceComposerClient>& client,
184            const sp<IBinder>& id);
185
186    status_t setDisplaySurface(const sp<IBinder>& token,
187            sp<IGraphicBufferProducer> bufferProducer);
188    void setDisplayLayerStack(const sp<IBinder>& token, uint32_t layerStack);
189    void setDisplayProjection(const sp<IBinder>& token,
190            uint32_t orientation,
191            const Rect& layerStackRect,
192            const Rect& displayRect);
193    void setDisplaySize(const sp<IBinder>& token, uint32_t width, uint32_t height);
194
195    static void setAnimationTransaction() {
196        Composer::getInstance().setAnimationTransactionImpl();
197    }
198
199    static void openGlobalTransaction() {
200        Composer::getInstance().openGlobalTransactionImpl();
201    }
202
203    static void closeGlobalTransaction(bool synchronous) {
204        Composer::getInstance().closeGlobalTransactionImpl(synchronous);
205    }
206
207    static status_t enableVSyncInjections(bool enable) {
208        return Composer::getInstance().enableVSyncInjectionsImpl(enable);
209    }
210
211    static status_t injectVSync(nsecs_t when) {
212        return Composer::getInstance().injectVSyncImpl(when);
213    }
214};
215
216ANDROID_SINGLETON_STATIC_INSTANCE(Composer);
217
218// ---------------------------------------------------------------------------
219
220sp<IBinder> Composer::createDisplay(const String8& displayName, bool secure) {
221    return ComposerService::getComposerService()->createDisplay(displayName,
222            secure);
223}
224
225void Composer::destroyDisplay(const sp<IBinder>& display) {
226    return ComposerService::getComposerService()->destroyDisplay(display);
227}
228
229sp<IBinder> Composer::getBuiltInDisplay(int32_t id) {
230    return ComposerService::getComposerService()->getBuiltInDisplay(id);
231}
232
233void Composer::openGlobalTransactionImpl() {
234    { // scope for the lock
235        Mutex::Autolock _l(mLock);
236        mTransactionNestCount += 1;
237    }
238}
239
240void Composer::closeGlobalTransactionImpl(bool synchronous) {
241    sp<ISurfaceComposer> sm(ComposerService::getComposerService());
242
243    Vector<ComposerState> transaction;
244    Vector<DisplayState> displayTransaction;
245    uint32_t flags = 0;
246
247    { // scope for the lock
248        Mutex::Autolock _l(mLock);
249        mForceSynchronous |= synchronous;
250        if (!mTransactionNestCount) {
251            ALOGW("At least one call to closeGlobalTransaction() was not matched by a prior "
252                    "call to openGlobalTransaction().");
253        } else if (--mTransactionNestCount) {
254            return;
255        }
256
257        transaction = mComposerStates;
258        mComposerStates.clear();
259
260        displayTransaction = mDisplayStates;
261        mDisplayStates.clear();
262
263        if (mForceSynchronous) {
264            flags |= ISurfaceComposer::eSynchronous;
265        }
266        if (mAnimation) {
267            flags |= ISurfaceComposer::eAnimation;
268        }
269
270        mForceSynchronous = false;
271        mAnimation = false;
272    }
273
274   sm->setTransactionState(transaction, displayTransaction, flags);
275}
276
277status_t Composer::enableVSyncInjectionsImpl(bool enable) {
278    sp<ISurfaceComposer> sm(ComposerService::getComposerService());
279    return sm->enableVSyncInjections(enable);
280}
281
282status_t Composer::injectVSyncImpl(nsecs_t when) {
283    sp<ISurfaceComposer> sm(ComposerService::getComposerService());
284    return sm->injectVSync(when);
285}
286
287void Composer::setAnimationTransactionImpl() {
288    Mutex::Autolock _l(mLock);
289    mAnimation = true;
290}
291
292layer_state_t* Composer::getLayerStateLocked(
293        const sp<SurfaceComposerClient>& client, const sp<IBinder>& id) {
294
295    ComposerState s;
296    s.client = client->mClient;
297    s.state.surface = id;
298
299    ssize_t index = mComposerStates.indexOf(s);
300    if (index < 0) {
301        // we don't have it, add an initialized layer_state to our list
302        index = mComposerStates.add(s);
303    }
304
305    ComposerState* const out = mComposerStates.editArray();
306    return &(out[index].state);
307}
308
309status_t Composer::setPosition(const sp<SurfaceComposerClient>& client,
310        const sp<IBinder>& id, float x, float y) {
311    Mutex::Autolock _l(mLock);
312    layer_state_t* s = getLayerStateLocked(client, id);
313    if (!s)
314        return BAD_INDEX;
315    s->what |= layer_state_t::ePositionChanged;
316    s->x = x;
317    s->y = y;
318    return NO_ERROR;
319}
320
321status_t Composer::setSize(const sp<SurfaceComposerClient>& client,
322        const sp<IBinder>& id, uint32_t w, uint32_t h) {
323    Mutex::Autolock _l(mLock);
324    layer_state_t* s = getLayerStateLocked(client, id);
325    if (!s)
326        return BAD_INDEX;
327    s->what |= layer_state_t::eSizeChanged;
328    s->w = w;
329    s->h = h;
330
331    // Resizing a surface makes the transaction synchronous.
332    mForceSynchronous = true;
333
334    return NO_ERROR;
335}
336
337status_t Composer::setLayer(const sp<SurfaceComposerClient>& client,
338        const sp<IBinder>& id, int32_t z) {
339    Mutex::Autolock _l(mLock);
340    layer_state_t* s = getLayerStateLocked(client, id);
341    if (!s)
342        return BAD_INDEX;
343    s->what |= layer_state_t::eLayerChanged;
344    s->z = z;
345    return NO_ERROR;
346}
347
348status_t Composer::setRelativeLayer(const sp<SurfaceComposerClient>& client,
349        const sp<IBinder>& id, const sp<IBinder>& relativeTo,
350        int32_t z) {
351    Mutex::Autolock _l(mLock);
352    layer_state_t* s = getLayerStateLocked(client, id);
353    if (!s) {
354        return BAD_INDEX;
355    }
356    s->what |= layer_state_t::eRelativeLayerChanged;
357    s->relativeLayerHandle = relativeTo;
358    s->z = z;
359    return NO_ERROR;
360}
361
362status_t Composer::setFlags(const sp<SurfaceComposerClient>& client,
363        const sp<IBinder>& id, uint32_t flags,
364        uint32_t mask) {
365    Mutex::Autolock _l(mLock);
366    layer_state_t* s = getLayerStateLocked(client, id);
367    if (!s)
368        return BAD_INDEX;
369    if ((mask & layer_state_t::eLayerOpaque) ||
370            (mask & layer_state_t::eLayerHidden) ||
371            (mask & layer_state_t::eLayerSecure)) {
372        s->what |= layer_state_t::eFlagsChanged;
373    }
374    s->flags &= ~mask;
375    s->flags |= (flags & mask);
376    s->mask |= mask;
377    return NO_ERROR;
378}
379
380status_t Composer::setTransparentRegionHint(
381        const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
382        const Region& transparentRegion) {
383    Mutex::Autolock _l(mLock);
384    layer_state_t* s = getLayerStateLocked(client, id);
385    if (!s)
386        return BAD_INDEX;
387    s->what |= layer_state_t::eTransparentRegionChanged;
388    s->transparentRegion = transparentRegion;
389    return NO_ERROR;
390}
391
392status_t Composer::setAlpha(const sp<SurfaceComposerClient>& client,
393        const sp<IBinder>& id, float alpha) {
394    Mutex::Autolock _l(mLock);
395    layer_state_t* s = getLayerStateLocked(client, id);
396    if (!s)
397        return BAD_INDEX;
398    s->what |= layer_state_t::eAlphaChanged;
399    s->alpha = alpha;
400    return NO_ERROR;
401}
402
403status_t Composer::setLayerStack(const sp<SurfaceComposerClient>& client,
404        const sp<IBinder>& id, uint32_t layerStack) {
405    Mutex::Autolock _l(mLock);
406    layer_state_t* s = getLayerStateLocked(client, id);
407    if (!s)
408        return BAD_INDEX;
409    s->what |= layer_state_t::eLayerStackChanged;
410    s->layerStack = layerStack;
411    return NO_ERROR;
412}
413
414status_t Composer::setMatrix(const sp<SurfaceComposerClient>& client,
415        const sp<IBinder>& id, float dsdx, float dtdx,
416        float dtdy, float dsdy) {
417    Mutex::Autolock _l(mLock);
418    layer_state_t* s = getLayerStateLocked(client, id);
419    if (!s)
420        return BAD_INDEX;
421    s->what |= layer_state_t::eMatrixChanged;
422    layer_state_t::matrix22_t matrix;
423    matrix.dsdx = dsdx;
424    matrix.dtdx = dtdx;
425    matrix.dsdy = dsdy;
426    matrix.dtdy = dtdy;
427    s->matrix = matrix;
428    return NO_ERROR;
429}
430
431status_t Composer::setCrop(const sp<SurfaceComposerClient>& client,
432        const sp<IBinder>& id, const Rect& crop) {
433    Mutex::Autolock _l(mLock);
434    layer_state_t* s = getLayerStateLocked(client, id);
435    if (!s)
436        return BAD_INDEX;
437    s->what |= layer_state_t::eCropChanged;
438    s->crop = crop;
439    return NO_ERROR;
440}
441
442status_t Composer::setFinalCrop(const sp<SurfaceComposerClient>& client,
443        const sp<IBinder>& id, const Rect& crop) {
444    Mutex::Autolock _l(mLock);
445    layer_state_t* s = getLayerStateLocked(client, id);
446    if (!s) {
447        return BAD_INDEX;
448    }
449    s->what |= layer_state_t::eFinalCropChanged;
450    s->finalCrop = crop;
451    return NO_ERROR;
452}
453
454status_t Composer::deferTransactionUntil(
455        const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
456        const sp<IBinder>& handle, uint64_t frameNumber) {
457    Mutex::Autolock lock(mLock);
458    layer_state_t* s = getLayerStateLocked(client, id);
459    if (!s) {
460        return BAD_INDEX;
461    }
462    s->what |= layer_state_t::eDeferTransaction;
463    s->barrierHandle = handle;
464    s->frameNumber = frameNumber;
465    return NO_ERROR;
466}
467
468status_t Composer::deferTransactionUntil(
469        const sp<SurfaceComposerClient>& client, const sp<IBinder>& id,
470        const sp<Surface>& barrierSurface, uint64_t frameNumber) {
471    Mutex::Autolock lock(mLock);
472    layer_state_t* s = getLayerStateLocked(client, id);
473    if (!s) {
474        return BAD_INDEX;
475    }
476    s->what |= layer_state_t::eDeferTransaction;
477    s->barrierGbp = barrierSurface->getIGraphicBufferProducer();
478    s->frameNumber = frameNumber;
479    return NO_ERROR;
480}
481
482status_t Composer::reparentChildren(
483        const sp<SurfaceComposerClient>& client,
484        const sp<IBinder>& id,
485        const sp<IBinder>& newParentHandle) {
486    Mutex::Autolock lock(mLock);
487    layer_state_t* s = getLayerStateLocked(client, id);
488    if (!s) {
489        return BAD_INDEX;
490    }
491    s->what |= layer_state_t::eReparentChildren;
492    s->reparentHandle = newParentHandle;
493    return NO_ERROR;
494}
495
496status_t Composer::detachChildren(
497        const sp<SurfaceComposerClient>& client,
498        const sp<IBinder>& id) {
499    Mutex::Autolock lock(mLock);
500    layer_state_t* s = getLayerStateLocked(client, id);
501    if (!s) {
502        return BAD_INDEX;
503    }
504    s->what |= layer_state_t::eDetachChildren;
505    return NO_ERROR;
506}
507
508status_t Composer::setOverrideScalingMode(
509        const sp<SurfaceComposerClient>& client,
510        const sp<IBinder>& id, int32_t overrideScalingMode) {
511    Mutex::Autolock lock(mLock);
512    layer_state_t* s = getLayerStateLocked(client, id);
513    if (!s) {
514        return BAD_INDEX;
515    }
516
517    switch (overrideScalingMode) {
518        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
519        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
520        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
521        case NATIVE_WINDOW_SCALING_MODE_NO_SCALE_CROP:
522        case -1:
523            break;
524        default:
525            ALOGE("unknown scaling mode: %d",
526                    overrideScalingMode);
527            return BAD_VALUE;
528    }
529
530    s->what |= layer_state_t::eOverrideScalingModeChanged;
531    s->overrideScalingMode = overrideScalingMode;
532    return NO_ERROR;
533}
534
535status_t Composer::setGeometryAppliesWithResize(
536        const sp<SurfaceComposerClient>& client,
537        const sp<IBinder>& id) {
538    Mutex::Autolock lock(mLock);
539    layer_state_t* s = getLayerStateLocked(client, id);
540    if (!s) {
541        return BAD_INDEX;
542    }
543    s->what |= layer_state_t::eGeometryAppliesWithResize;
544    return NO_ERROR;
545}
546
547// ---------------------------------------------------------------------------
548
549DisplayState& Composer::getDisplayStateLocked(const sp<IBinder>& token) {
550    DisplayState s;
551    s.token = token;
552    ssize_t index = mDisplayStates.indexOf(s);
553    if (index < 0) {
554        // we don't have it, add an initialized layer_state to our list
555        s.what = 0;
556        index = mDisplayStates.add(s);
557    }
558    return mDisplayStates.editItemAt(static_cast<size_t>(index));
559}
560
561status_t Composer::setDisplaySurface(const sp<IBinder>& token,
562        sp<IGraphicBufferProducer> bufferProducer) {
563    if (bufferProducer.get() != nullptr) {
564        // Make sure that composition can never be stalled by a virtual display
565        // consumer that isn't processing buffers fast enough.
566        status_t err = bufferProducer->setAsyncMode(true);
567        if (err != NO_ERROR) {
568            ALOGE("Composer::setDisplaySurface Failed to enable async mode on the "
569                    "BufferQueue. This BufferQueue cannot be used for virtual "
570                    "display. (%d)", err);
571            return err;
572        }
573    }
574    Mutex::Autolock _l(mLock);
575    DisplayState& s(getDisplayStateLocked(token));
576    s.surface = bufferProducer;
577    s.what |= DisplayState::eSurfaceChanged;
578    return NO_ERROR;
579}
580
581void Composer::setDisplayLayerStack(const sp<IBinder>& token,
582        uint32_t layerStack) {
583    Mutex::Autolock _l(mLock);
584    DisplayState& s(getDisplayStateLocked(token));
585    s.layerStack = layerStack;
586    s.what |= DisplayState::eLayerStackChanged;
587}
588
589void Composer::setDisplayProjection(const sp<IBinder>& token,
590        uint32_t orientation,
591        const Rect& layerStackRect,
592        const Rect& displayRect) {
593    Mutex::Autolock _l(mLock);
594    DisplayState& s(getDisplayStateLocked(token));
595    s.orientation = orientation;
596    s.viewport = layerStackRect;
597    s.frame = displayRect;
598    s.what |= DisplayState::eDisplayProjectionChanged;
599    mForceSynchronous = true; // TODO: do we actually still need this?
600}
601
602void Composer::setDisplaySize(const sp<IBinder>& token, uint32_t width, uint32_t height) {
603    Mutex::Autolock _l(mLock);
604    DisplayState& s(getDisplayStateLocked(token));
605    s.width = width;
606    s.height = height;
607    s.what |= DisplayState::eDisplaySizeChanged;
608}
609
610// ---------------------------------------------------------------------------
611
612SurfaceComposerClient::SurfaceComposerClient()
613    : mStatus(NO_INIT), mComposer(Composer::getInstance())
614{
615}
616
617SurfaceComposerClient::SurfaceComposerClient(const sp<IGraphicBufferProducer>& root)
618    : mStatus(NO_INIT), mComposer(Composer::getInstance()), mParent(root)
619{
620}
621
622void SurfaceComposerClient::onFirstRef() {
623    sp<ISurfaceComposer> sm(ComposerService::getComposerService());
624    if (sm != 0) {
625        auto rootProducer = mParent.promote();
626        sp<ISurfaceComposerClient> conn;
627        conn = (rootProducer != nullptr) ? sm->createScopedConnection(rootProducer) :
628                sm->createConnection();
629        if (conn != 0) {
630            mClient = conn;
631            mStatus = NO_ERROR;
632        }
633    }
634}
635
636SurfaceComposerClient::~SurfaceComposerClient() {
637    dispose();
638}
639
640status_t SurfaceComposerClient::initCheck() const {
641    return mStatus;
642}
643
644sp<IBinder> SurfaceComposerClient::connection() const {
645    return IInterface::asBinder(mClient);
646}
647
648status_t SurfaceComposerClient::linkToComposerDeath(
649        const sp<IBinder::DeathRecipient>& recipient,
650        void* cookie, uint32_t flags) {
651    sp<ISurfaceComposer> sm(ComposerService::getComposerService());
652    return IInterface::asBinder(sm)->linkToDeath(recipient, cookie, flags);
653}
654
655void SurfaceComposerClient::dispose() {
656    // this can be called more than once.
657    sp<ISurfaceComposerClient> client;
658    Mutex::Autolock _lm(mLock);
659    if (mClient != 0) {
660        client = mClient; // hold ref while lock is held
661        mClient.clear();
662    }
663    mStatus = NO_INIT;
664}
665
666sp<SurfaceControl> SurfaceComposerClient::createSurface(
667        const String8& name,
668        uint32_t w,
669        uint32_t h,
670        PixelFormat format,
671        uint32_t flags,
672        SurfaceControl* parent,
673        uint32_t windowType,
674        uint32_t ownerUid)
675{
676    sp<SurfaceControl> sur;
677    if (mStatus == NO_ERROR) {
678        sp<IBinder> handle;
679        sp<IBinder> parentHandle;
680        sp<IGraphicBufferProducer> gbp;
681
682        if (parent != nullptr) {
683            parentHandle = parent->getHandle();
684        }
685        status_t err = mClient->createSurface(name, w, h, format, flags, parentHandle,
686                windowType, ownerUid, &handle, &gbp);
687        ALOGE_IF(err, "SurfaceComposerClient::createSurface error %s", strerror(-err));
688        if (err == NO_ERROR) {
689            sur = new SurfaceControl(this, handle, gbp);
690        }
691    }
692    return sur;
693}
694
695sp<IBinder> SurfaceComposerClient::createDisplay(const String8& displayName,
696        bool secure) {
697    return Composer::getInstance().createDisplay(displayName, secure);
698}
699
700void SurfaceComposerClient::destroyDisplay(const sp<IBinder>& display) {
701    Composer::getInstance().destroyDisplay(display);
702}
703
704sp<IBinder> SurfaceComposerClient::getBuiltInDisplay(int32_t id) {
705    return Composer::getInstance().getBuiltInDisplay(id);
706}
707
708status_t SurfaceComposerClient::destroySurface(const sp<IBinder>& sid) {
709    if (mStatus != NO_ERROR)
710        return mStatus;
711    status_t err = mClient->destroySurface(sid);
712    return err;
713}
714
715status_t SurfaceComposerClient::clearLayerFrameStats(const sp<IBinder>& token) const {
716    if (mStatus != NO_ERROR) {
717        return mStatus;
718    }
719    return mClient->clearLayerFrameStats(token);
720}
721
722status_t SurfaceComposerClient::getLayerFrameStats(const sp<IBinder>& token,
723        FrameStats* outStats) const {
724    if (mStatus != NO_ERROR) {
725        return mStatus;
726    }
727    return mClient->getLayerFrameStats(token, outStats);
728}
729
730inline Composer& SurfaceComposerClient::getComposer() {
731    return mComposer;
732}
733
734// ----------------------------------------------------------------------------
735
736void SurfaceComposerClient::openGlobalTransaction() {
737    Composer::openGlobalTransaction();
738}
739
740void SurfaceComposerClient::closeGlobalTransaction(bool synchronous) {
741    Composer::closeGlobalTransaction(synchronous);
742}
743
744void SurfaceComposerClient::setAnimationTransaction() {
745    Composer::setAnimationTransaction();
746}
747
748status_t SurfaceComposerClient::enableVSyncInjections(bool enable) {
749    return Composer::enableVSyncInjections(enable);
750}
751
752status_t SurfaceComposerClient::injectVSync(nsecs_t when) {
753    return Composer::injectVSync(when);
754}
755
756// ----------------------------------------------------------------------------
757
758status_t SurfaceComposerClient::setCrop(const sp<IBinder>& id, const Rect& crop) {
759    return getComposer().setCrop(this, id, crop);
760}
761
762status_t SurfaceComposerClient::setFinalCrop(const sp<IBinder>& id,
763        const Rect& crop) {
764    return getComposer().setFinalCrop(this, id, crop);
765}
766
767status_t SurfaceComposerClient::setPosition(const sp<IBinder>& id, float x, float y) {
768    return getComposer().setPosition(this, id, x, y);
769}
770
771status_t SurfaceComposerClient::setSize(const sp<IBinder>& id, uint32_t w, uint32_t h) {
772    return getComposer().setSize(this, id, w, h);
773}
774
775status_t SurfaceComposerClient::setLayer(const sp<IBinder>& id, int32_t z) {
776    return getComposer().setLayer(this, id, z);
777}
778
779status_t SurfaceComposerClient::setRelativeLayer(const sp<IBinder>& id,
780        const sp<IBinder>& relativeTo, int32_t z) {
781    return getComposer().setRelativeLayer(this, id, relativeTo, z);
782}
783
784status_t SurfaceComposerClient::hide(const sp<IBinder>& id) {
785    return getComposer().setFlags(this, id,
786            layer_state_t::eLayerHidden,
787            layer_state_t::eLayerHidden);
788}
789
790status_t SurfaceComposerClient::show(const sp<IBinder>& id) {
791    return getComposer().setFlags(this, id,
792            0,
793            layer_state_t::eLayerHidden);
794}
795
796status_t SurfaceComposerClient::setFlags(const sp<IBinder>& id, uint32_t flags,
797        uint32_t mask) {
798    return getComposer().setFlags(this, id, flags, mask);
799}
800
801status_t SurfaceComposerClient::setTransparentRegionHint(const sp<IBinder>& id,
802        const Region& transparentRegion) {
803    return getComposer().setTransparentRegionHint(this, id, transparentRegion);
804}
805
806status_t SurfaceComposerClient::setAlpha(const sp<IBinder>& id, float alpha) {
807    return getComposer().setAlpha(this, id, alpha);
808}
809
810status_t SurfaceComposerClient::setLayerStack(const sp<IBinder>& id, uint32_t layerStack) {
811    return getComposer().setLayerStack(this, id, layerStack);
812}
813
814status_t SurfaceComposerClient::setMatrix(const sp<IBinder>& id, float dsdx, float dtdx,
815        float dtdy, float dsdy) {
816    return getComposer().setMatrix(this, id, dsdx, dtdx, dtdy, dsdy);
817}
818
819status_t SurfaceComposerClient::deferTransactionUntil(const sp<IBinder>& id,
820        const sp<IBinder>& handle, uint64_t frameNumber) {
821    return getComposer().deferTransactionUntil(this, id, handle, frameNumber);
822}
823
824status_t SurfaceComposerClient::deferTransactionUntil(const sp<IBinder>& id,
825        const sp<Surface>& barrierSurface, uint64_t frameNumber) {
826    return getComposer().deferTransactionUntil(this, id, barrierSurface, frameNumber);
827}
828
829status_t SurfaceComposerClient::reparentChildren(const sp<IBinder>& id,
830        const sp<IBinder>& newParentHandle) {
831    return getComposer().reparentChildren(this, id, newParentHandle);
832}
833
834status_t SurfaceComposerClient::detachChildren(const sp<IBinder>& id) {
835    return getComposer().detachChildren(this, id);
836}
837
838status_t SurfaceComposerClient::setOverrideScalingMode(
839        const sp<IBinder>& id, int32_t overrideScalingMode) {
840    return getComposer().setOverrideScalingMode(
841            this, id, overrideScalingMode);
842}
843
844status_t SurfaceComposerClient::setGeometryAppliesWithResize(
845        const sp<IBinder>& id) {
846    return getComposer().setGeometryAppliesWithResize(this, id);
847}
848
849// ----------------------------------------------------------------------------
850
851status_t SurfaceComposerClient::setDisplaySurface(const sp<IBinder>& token,
852        sp<IGraphicBufferProducer> bufferProducer) {
853    return Composer::getInstance().setDisplaySurface(token, bufferProducer);
854}
855
856void SurfaceComposerClient::setDisplayLayerStack(const sp<IBinder>& token,
857        uint32_t layerStack) {
858    Composer::getInstance().setDisplayLayerStack(token, layerStack);
859}
860
861void SurfaceComposerClient::setDisplayProjection(const sp<IBinder>& token,
862        uint32_t orientation,
863        const Rect& layerStackRect,
864        const Rect& displayRect) {
865    Composer::getInstance().setDisplayProjection(token, orientation,
866            layerStackRect, displayRect);
867}
868
869void SurfaceComposerClient::setDisplaySize(const sp<IBinder>& token,
870        uint32_t width, uint32_t height) {
871    Composer::getInstance().setDisplaySize(token, width, height);
872}
873
874// ----------------------------------------------------------------------------
875
876status_t SurfaceComposerClient::getDisplayConfigs(
877        const sp<IBinder>& display, Vector<DisplayInfo>* configs)
878{
879    return ComposerService::getComposerService()->getDisplayConfigs(display, configs);
880}
881
882status_t SurfaceComposerClient::getDisplayInfo(const sp<IBinder>& display,
883        DisplayInfo* info) {
884    Vector<DisplayInfo> configs;
885    status_t result = getDisplayConfigs(display, &configs);
886    if (result != NO_ERROR) {
887        return result;
888    }
889
890    int activeId = getActiveConfig(display);
891    if (activeId < 0) {
892        ALOGE("No active configuration found");
893        return NAME_NOT_FOUND;
894    }
895
896    *info = configs[static_cast<size_t>(activeId)];
897    return NO_ERROR;
898}
899
900int SurfaceComposerClient::getActiveConfig(const sp<IBinder>& display) {
901    return ComposerService::getComposerService()->getActiveConfig(display);
902}
903
904status_t SurfaceComposerClient::setActiveConfig(const sp<IBinder>& display, int id) {
905    return ComposerService::getComposerService()->setActiveConfig(display, id);
906}
907
908status_t SurfaceComposerClient::getDisplayColorModes(const sp<IBinder>& display,
909        Vector<android_color_mode_t>* outColorModes) {
910    return ComposerService::getComposerService()->getDisplayColorModes(display, outColorModes);
911}
912
913android_color_mode_t SurfaceComposerClient::getActiveColorMode(const sp<IBinder>& display) {
914    return ComposerService::getComposerService()->getActiveColorMode(display);
915}
916
917status_t SurfaceComposerClient::setActiveColorMode(const sp<IBinder>& display,
918        android_color_mode_t colorMode) {
919    return ComposerService::getComposerService()->setActiveColorMode(display, colorMode);
920}
921
922void SurfaceComposerClient::setDisplayPowerMode(const sp<IBinder>& token,
923        int mode) {
924    ComposerService::getComposerService()->setPowerMode(token, mode);
925}
926
927status_t SurfaceComposerClient::clearAnimationFrameStats() {
928    return ComposerService::getComposerService()->clearAnimationFrameStats();
929}
930
931status_t SurfaceComposerClient::getAnimationFrameStats(FrameStats* outStats) {
932    return ComposerService::getComposerService()->getAnimationFrameStats(outStats);
933}
934
935status_t SurfaceComposerClient::getHdrCapabilities(const sp<IBinder>& display,
936        HdrCapabilities* outCapabilities) {
937    return ComposerService::getComposerService()->getHdrCapabilities(display,
938            outCapabilities);
939}
940
941// ----------------------------------------------------------------------------
942
943status_t ScreenshotClient::capture(
944        const sp<IBinder>& display,
945        const sp<IGraphicBufferProducer>& producer,
946        Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
947        int32_t minLayerZ, int32_t maxLayerZ, bool useIdentityTransform) {
948    sp<ISurfaceComposer> s(ComposerService::getComposerService());
949    if (s == NULL) return NO_INIT;
950    return s->captureScreen(display, producer, sourceCrop,
951            reqWidth, reqHeight, minLayerZ, maxLayerZ, useIdentityTransform);
952}
953
954status_t ScreenshotClient::captureToBuffer(const sp<IBinder>& display,
955        Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
956        int32_t minLayerZ, int32_t maxLayerZ, bool useIdentityTransform,
957        uint32_t rotation,
958        sp<GraphicBuffer>* outBuffer) {
959    sp<ISurfaceComposer> s(ComposerService::getComposerService());
960    if (s == NULL) return NO_INIT;
961
962    sp<IGraphicBufferConsumer> gbpConsumer;
963    sp<IGraphicBufferProducer> producer;
964    BufferQueue::createBufferQueue(&producer, &gbpConsumer);
965    sp<BufferItemConsumer> consumer(new BufferItemConsumer(gbpConsumer,
966           GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_SW_READ_NEVER | GRALLOC_USAGE_SW_WRITE_NEVER,
967           1, true));
968
969    status_t ret = s->captureScreen(display, producer, sourceCrop, reqWidth, reqHeight,
970            minLayerZ, maxLayerZ, useIdentityTransform,
971            static_cast<ISurfaceComposer::Rotation>(rotation));
972    if (ret != NO_ERROR) {
973        return ret;
974    }
975    BufferItem b;
976    consumer->acquireBuffer(&b, 0, true);
977    *outBuffer = b.mGraphicBuffer;
978    return ret;
979}
980
981ScreenshotClient::ScreenshotClient()
982    : mHaveBuffer(false) {
983    memset(&mBuffer, 0, sizeof(mBuffer));
984}
985
986ScreenshotClient::~ScreenshotClient() {
987    ScreenshotClient::release();
988}
989
990sp<CpuConsumer> ScreenshotClient::getCpuConsumer() const {
991    if (mCpuConsumer == NULL) {
992        sp<IGraphicBufferConsumer> consumer;
993        BufferQueue::createBufferQueue(&mProducer, &consumer);
994        mCpuConsumer = new CpuConsumer(consumer, 1);
995        mCpuConsumer->setName(String8("ScreenshotClient"));
996    }
997    return mCpuConsumer;
998}
999
1000status_t ScreenshotClient::update(const sp<IBinder>& display,
1001        Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
1002        int32_t minLayerZ, int32_t maxLayerZ,
1003        bool useIdentityTransform, uint32_t rotation) {
1004    sp<ISurfaceComposer> s(ComposerService::getComposerService());
1005    if (s == NULL) return NO_INIT;
1006    sp<CpuConsumer> cpuConsumer = getCpuConsumer();
1007
1008    if (mHaveBuffer) {
1009        mCpuConsumer->unlockBuffer(mBuffer);
1010        memset(&mBuffer, 0, sizeof(mBuffer));
1011        mHaveBuffer = false;
1012    }
1013
1014    status_t err = s->captureScreen(display, mProducer, sourceCrop,
1015            reqWidth, reqHeight, minLayerZ, maxLayerZ, useIdentityTransform,
1016            static_cast<ISurfaceComposer::Rotation>(rotation));
1017
1018    if (err == NO_ERROR) {
1019        err = mCpuConsumer->lockNextBuffer(&mBuffer);
1020        if (err == NO_ERROR) {
1021            mHaveBuffer = true;
1022        }
1023    }
1024    return err;
1025}
1026
1027status_t ScreenshotClient::update(const sp<IBinder>& display,
1028        Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
1029        int32_t minLayerZ, int32_t maxLayerZ,
1030        bool useIdentityTransform) {
1031
1032    return ScreenshotClient::update(display, sourceCrop, reqWidth, reqHeight,
1033            minLayerZ, maxLayerZ, useIdentityTransform, ISurfaceComposer::eRotateNone);
1034}
1035
1036status_t ScreenshotClient::update(const sp<IBinder>& display, Rect sourceCrop,
1037        bool useIdentityTransform) {
1038    return ScreenshotClient::update(display, sourceCrop, 0, 0,
1039            INT32_MIN, INT32_MAX,
1040            useIdentityTransform, ISurfaceComposer::eRotateNone);
1041}
1042
1043status_t ScreenshotClient::update(const sp<IBinder>& display, Rect sourceCrop,
1044        uint32_t reqWidth, uint32_t reqHeight, bool useIdentityTransform) {
1045    return ScreenshotClient::update(display, sourceCrop, reqWidth, reqHeight,
1046            INT32_MIN, INT32_MAX,
1047            useIdentityTransform, ISurfaceComposer::eRotateNone);
1048}
1049
1050void ScreenshotClient::release() {
1051    if (mHaveBuffer) {
1052        mCpuConsumer->unlockBuffer(mBuffer);
1053        memset(&mBuffer, 0, sizeof(mBuffer));
1054        mHaveBuffer = false;
1055    }
1056    mCpuConsumer.clear();
1057}
1058
1059void const* ScreenshotClient::getPixels() const {
1060    return mBuffer.data;
1061}
1062
1063uint32_t ScreenshotClient::getWidth() const {
1064    return mBuffer.width;
1065}
1066
1067uint32_t ScreenshotClient::getHeight() const {
1068    return mBuffer.height;
1069}
1070
1071PixelFormat ScreenshotClient::getFormat() const {
1072    return mBuffer.format;
1073}
1074
1075uint32_t ScreenshotClient::getStride() const {
1076    return mBuffer.stride;
1077}
1078
1079size_t ScreenshotClient::getSize() const {
1080    return mBuffer.stride * mBuffer.height * bytesPerPixel(mBuffer.format);
1081}
1082
1083// ----------------------------------------------------------------------------
1084}; // namespace android
1085