SurfaceComposerClient.cpp revision b8d69a55f1c187a35ac41e69de63251f5501b6f4 
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/IMemory.h>
30#include <binder/IServiceManager.h>
31
32#include <ui/DisplayInfo.h>
33
34#include <surfaceflinger/ISurface.h>
35#include <surfaceflinger/ISurfaceComposer.h>
36#include <surfaceflinger/ISurfaceComposerClient.h>
37#include <surfaceflinger/SurfaceComposerClient.h>
38
39#include <private/surfaceflinger/LayerState.h>
40#include <private/surfaceflinger/SharedBufferStack.h>
41
42
43namespace android {
44// ---------------------------------------------------------------------------
45
46ANDROID_SINGLETON_STATIC_INSTANCE(ComposerService);
47
48ComposerService::ComposerService()
49: Singleton<ComposerService>() {
50    const String16 name("SurfaceFlinger");
51    while (getService(name, &mComposerService) != NO_ERROR) {
52        usleep(250000);
53    }
54    mServerCblkMemory = mComposerService->getCblk();
55    mServerCblk = static_cast<surface_flinger_cblk_t volatile *>(
56            mServerCblkMemory->getBase());
57}
58
59sp<ISurfaceComposer> ComposerService::getComposerService() {
60    return ComposerService::getInstance().mComposerService;
61}
62
63surface_flinger_cblk_t const volatile * ComposerService::getControlBlock() {
64    return ComposerService::getInstance().mServerCblk;
65}
66
67static inline sp<ISurfaceComposer> getComposerService() {
68    return ComposerService::getComposerService();
69}
70
71static inline surface_flinger_cblk_t const volatile * get_cblk() {
72    return ComposerService::getControlBlock();
73}
74
75// ---------------------------------------------------------------------------
76
77// NOTE: this is NOT a member function (it's a friend defined with its
78// declaration).
79static inline
80int compare_type( const ComposerState& lhs, const ComposerState& rhs) {
81    if (lhs.client < rhs.client)  return -1;
82    if (lhs.client > rhs.client)  return 1;
83    if (lhs.state.surface < rhs.state.surface)  return -1;
84    if (lhs.state.surface > rhs.state.surface)  return 1;
85    return 0;
86}
87
88class Composer : public Singleton<Composer>
89{
90    friend class Singleton<Composer>;
91
92    mutable Mutex               mLock;
93    SortedVector<ComposerState> mStates;
94    int                         mOrientation;
95
96    Composer() : Singleton<Composer>(),
97        mOrientation(ISurfaceComposer::eOrientationUnchanged) { }
98
99    void closeGlobalTransactionImpl();
100
101    layer_state_t* getLayerStateLocked(
102            const sp<SurfaceComposerClient>& client, SurfaceID id);
103
104public:
105
106    status_t setPosition(const sp<SurfaceComposerClient>& client, SurfaceID id,
107            float x, float y);
108    status_t setSize(const sp<SurfaceComposerClient>& client, SurfaceID id,
109            uint32_t w, uint32_t h);
110    status_t setLayer(const sp<SurfaceComposerClient>& client, SurfaceID id,
111            int32_t z);
112    status_t setFlags(const sp<SurfaceComposerClient>& client, SurfaceID id,
113            uint32_t flags, uint32_t mask);
114    status_t setTransparentRegionHint(
115            const sp<SurfaceComposerClient>& client, SurfaceID id,
116            const Region& transparentRegion);
117    status_t setAlpha(const sp<SurfaceComposerClient>& client, SurfaceID id,
118            float alpha);
119    status_t setMatrix(const sp<SurfaceComposerClient>& client, SurfaceID id,
120            float dsdx, float dtdx, float dsdy, float dtdy);
121    status_t setFreezeTint(
122            const sp<SurfaceComposerClient>& client, SurfaceID id,
123            uint32_t tint);
124    status_t setOrientation(int orientation);
125
126    static void closeGlobalTransaction() {
127        Composer::getInstance().closeGlobalTransactionImpl();
128    }
129};
130
131ANDROID_SINGLETON_STATIC_INSTANCE(Composer);
132
133// ---------------------------------------------------------------------------
134
135void Composer::closeGlobalTransactionImpl() {
136    sp<ISurfaceComposer> sm(getComposerService());
137
138    Vector<ComposerState> transaction;
139    int orientation;
140
141    { // scope for the lock
142        Mutex::Autolock _l(mLock);
143        transaction = mStates;
144        mStates.clear();
145
146        orientation = mOrientation;
147        mOrientation = ISurfaceComposer::eOrientationUnchanged;
148    }
149
150   sm->setTransactionState(transaction, orientation);
151}
152
153layer_state_t* Composer::getLayerStateLocked(
154        const sp<SurfaceComposerClient>& client, SurfaceID id) {
155
156    ComposerState s;
157    s.client = client->mClient;
158    s.state.surface = id;
159
160    ssize_t index = mStates.indexOf(s);
161    if (index < 0) {
162        // we don't have it, add an initialized layer_state to our list
163        index = mStates.add(s);
164    }
165
166    ComposerState* const out = mStates.editArray();
167    return &(out[index].state);
168}
169
170status_t Composer::setPosition(const sp<SurfaceComposerClient>& client,
171        SurfaceID id, float x, float y) {
172    Mutex::Autolock _l(mLock);
173    layer_state_t* s = getLayerStateLocked(client, id);
174    if (!s)
175        return BAD_INDEX;
176    s->what |= ISurfaceComposer::ePositionChanged;
177    s->x = x;
178    s->y = y;
179    return NO_ERROR;
180}
181
182status_t Composer::setSize(const sp<SurfaceComposerClient>& client,
183        SurfaceID id, uint32_t w, uint32_t h) {
184    Mutex::Autolock _l(mLock);
185    layer_state_t* s = getLayerStateLocked(client, id);
186    if (!s)
187        return BAD_INDEX;
188    s->what |= ISurfaceComposer::eSizeChanged;
189    s->w = w;
190    s->h = h;
191    return NO_ERROR;
192}
193
194status_t Composer::setLayer(const sp<SurfaceComposerClient>& client,
195        SurfaceID id, int32_t z) {
196    Mutex::Autolock _l(mLock);
197    layer_state_t* s = getLayerStateLocked(client, id);
198    if (!s)
199        return BAD_INDEX;
200    s->what |= ISurfaceComposer::eLayerChanged;
201    s->z = z;
202    return NO_ERROR;
203}
204
205status_t Composer::setFlags(const sp<SurfaceComposerClient>& client,
206        SurfaceID id, uint32_t flags,
207        uint32_t mask) {
208    Mutex::Autolock _l(mLock);
209    layer_state_t* s = getLayerStateLocked(client, id);
210    if (!s)
211        return BAD_INDEX;
212    s->what |= ISurfaceComposer::eVisibilityChanged;
213    s->flags &= ~mask;
214    s->flags |= (flags & mask);
215    s->mask |= mask;
216    return NO_ERROR;
217}
218
219status_t Composer::setTransparentRegionHint(
220        const sp<SurfaceComposerClient>& client, SurfaceID id,
221        const Region& transparentRegion) {
222    Mutex::Autolock _l(mLock);
223    layer_state_t* s = getLayerStateLocked(client, id);
224    if (!s)
225        return BAD_INDEX;
226    s->what |= ISurfaceComposer::eTransparentRegionChanged;
227    s->transparentRegion = transparentRegion;
228    return NO_ERROR;
229}
230
231status_t Composer::setAlpha(const sp<SurfaceComposerClient>& client,
232        SurfaceID id, float alpha) {
233    Mutex::Autolock _l(mLock);
234    layer_state_t* s = getLayerStateLocked(client, id);
235    if (!s)
236        return BAD_INDEX;
237    s->what |= ISurfaceComposer::eAlphaChanged;
238    s->alpha = alpha;
239    return NO_ERROR;
240}
241
242status_t Composer::setMatrix(const sp<SurfaceComposerClient>& client,
243        SurfaceID id, float dsdx, float dtdx,
244        float dsdy, float dtdy) {
245    Mutex::Autolock _l(mLock);
246    layer_state_t* s = getLayerStateLocked(client, id);
247    if (!s)
248        return BAD_INDEX;
249    s->what |= ISurfaceComposer::eMatrixChanged;
250    layer_state_t::matrix22_t matrix;
251    matrix.dsdx = dsdx;
252    matrix.dtdx = dtdx;
253    matrix.dsdy = dsdy;
254    matrix.dtdy = dtdy;
255    s->matrix = matrix;
256    return NO_ERROR;
257}
258
259status_t Composer::setFreezeTint(const sp<SurfaceComposerClient>& client,
260        SurfaceID id, uint32_t tint) {
261    Mutex::Autolock _l(mLock);
262    layer_state_t* s = getLayerStateLocked(client, id);
263    if (!s)
264        return BAD_INDEX;
265    s->what |= ISurfaceComposer::eFreezeTintChanged;
266    s->tint = tint;
267    return NO_ERROR;
268}
269
270status_t Composer::setOrientation(int orientation) {
271    Mutex::Autolock _l(mLock);
272    mOrientation = orientation;
273    return NO_ERROR;
274}
275
276// ---------------------------------------------------------------------------
277
278SurfaceComposerClient::SurfaceComposerClient()
279    : mStatus(NO_INIT), mComposer(Composer::getInstance())
280{
281}
282
283void SurfaceComposerClient::onFirstRef() {
284    sp<ISurfaceComposer> sm(getComposerService());
285    if (sm != 0) {
286        sp<ISurfaceComposerClient> conn = sm->createConnection();
287        if (conn != 0) {
288            mClient = conn;
289            mStatus = NO_ERROR;
290        }
291    }
292}
293
294SurfaceComposerClient::~SurfaceComposerClient() {
295    dispose();
296}
297
298status_t SurfaceComposerClient::initCheck() const {
299    return mStatus;
300}
301
302sp<IBinder> SurfaceComposerClient::connection() const {
303    return (mClient != 0) ? mClient->asBinder() : 0;
304}
305
306status_t SurfaceComposerClient::linkToComposerDeath(
307        const sp<IBinder::DeathRecipient>& recipient,
308        void* cookie, uint32_t flags) {
309    sp<ISurfaceComposer> sm(getComposerService());
310    return sm->asBinder()->linkToDeath(recipient, cookie, flags);
311}
312
313void SurfaceComposerClient::dispose() {
314    // this can be called more than once.
315    sp<ISurfaceComposerClient> client;
316    Mutex::Autolock _lm(mLock);
317    if (mClient != 0) {
318        client = mClient; // hold ref while lock is held
319        mClient.clear();
320    }
321    mStatus = NO_INIT;
322}
323
324sp<SurfaceControl> SurfaceComposerClient::createSurface(
325        DisplayID display,
326        uint32_t w,
327        uint32_t h,
328        PixelFormat format,
329        uint32_t flags)
330{
331    String8 name;
332    const size_t SIZE = 128;
333    char buffer[SIZE];
334    snprintf(buffer, SIZE, "<pid_%d>", getpid());
335    name.append(buffer);
336
337    return SurfaceComposerClient::createSurface(name, display,
338            w, h, format, flags);
339}
340
341sp<SurfaceControl> SurfaceComposerClient::createSurface(
342        const String8& name,
343        DisplayID display,
344        uint32_t w,
345        uint32_t h,
346        PixelFormat format,
347        uint32_t flags)
348{
349    sp<SurfaceControl> result;
350    if (mStatus == NO_ERROR) {
351        ISurfaceComposerClient::surface_data_t data;
352        sp<ISurface> surface = mClient->createSurface(&data, name,
353                display, w, h, format, flags);
354        if (surface != 0) {
355            result = new SurfaceControl(this, surface, data);
356        }
357    }
358    return result;
359}
360
361status_t SurfaceComposerClient::destroySurface(SurfaceID sid) {
362    if (mStatus != NO_ERROR)
363        return mStatus;
364    status_t err = mClient->destroySurface(sid);
365    return err;
366}
367
368inline Composer& SurfaceComposerClient::getComposer() {
369    return mComposer;
370}
371
372// ----------------------------------------------------------------------------
373
374void SurfaceComposerClient::openGlobalTransaction() {
375    // Currently a no-op
376}
377
378void SurfaceComposerClient::closeGlobalTransaction() {
379    Composer::closeGlobalTransaction();
380}
381
382// ----------------------------------------------------------------------------
383
384status_t SurfaceComposerClient::setFreezeTint(SurfaceID id, uint32_t tint) {
385    return getComposer().setFreezeTint(this, id, tint);
386}
387
388status_t SurfaceComposerClient::setPosition(SurfaceID id, float x, float y) {
389    return getComposer().setPosition(this, id, x, y);
390}
391
392status_t SurfaceComposerClient::setSize(SurfaceID id, uint32_t w, uint32_t h) {
393    return getComposer().setSize(this, id, w, h);
394}
395
396status_t SurfaceComposerClient::setLayer(SurfaceID id, int32_t z) {
397    return getComposer().setLayer(this, id, z);
398}
399
400status_t SurfaceComposerClient::hide(SurfaceID id) {
401    return getComposer().setFlags(this, id,
402            ISurfaceComposer::eLayerHidden,
403            ISurfaceComposer::eLayerHidden);
404}
405
406status_t SurfaceComposerClient::show(SurfaceID id, int32_t) {
407    return getComposer().setFlags(this, id,
408            0,
409            ISurfaceComposer::eLayerHidden);
410}
411
412status_t SurfaceComposerClient::freeze(SurfaceID id) {
413    return getComposer().setFlags(this, id,
414            ISurfaceComposer::eLayerFrozen,
415            ISurfaceComposer::eLayerFrozen);
416}
417
418status_t SurfaceComposerClient::unfreeze(SurfaceID id) {
419    return getComposer().setFlags(this, id,
420            0,
421            ISurfaceComposer::eLayerFrozen);
422}
423
424status_t SurfaceComposerClient::setFlags(SurfaceID id, uint32_t flags,
425        uint32_t mask) {
426    return getComposer().setFlags(this, id, flags, mask);
427}
428
429status_t SurfaceComposerClient::setTransparentRegionHint(SurfaceID id,
430        const Region& transparentRegion) {
431    return getComposer().setTransparentRegionHint(this, id, transparentRegion);
432}
433
434status_t SurfaceComposerClient::setAlpha(SurfaceID id, float alpha) {
435    return getComposer().setAlpha(this, id, alpha);
436}
437
438status_t SurfaceComposerClient::setMatrix(SurfaceID id, float dsdx, float dtdx,
439        float dsdy, float dtdy) {
440    return getComposer().setMatrix(this, id, dsdx, dtdx, dsdy, dtdy);
441}
442
443status_t SurfaceComposerClient::setOrientation(DisplayID dpy,
444        int orientation, uint32_t flags)
445{
446    return Composer::getInstance().setOrientation(orientation);
447}
448
449// ----------------------------------------------------------------------------
450
451status_t SurfaceComposerClient::getDisplayInfo(
452        DisplayID dpy, DisplayInfo* info)
453{
454    if (uint32_t(dpy)>=NUM_DISPLAY_MAX)
455        return BAD_VALUE;
456
457    volatile surface_flinger_cblk_t const * cblk = get_cblk();
458    volatile display_cblk_t const * dcblk = cblk->displays + dpy;
459
460    info->w              = dcblk->w;
461    info->h              = dcblk->h;
462    info->orientation    = dcblk->orientation;
463    info->xdpi           = dcblk->xdpi;
464    info->ydpi           = dcblk->ydpi;
465    info->fps            = dcblk->fps;
466    info->density        = dcblk->density;
467    return getPixelFormatInfo(dcblk->format, &(info->pixelFormatInfo));
468}
469
470ssize_t SurfaceComposerClient::getDisplayWidth(DisplayID dpy)
471{
472    if (uint32_t(dpy)>=NUM_DISPLAY_MAX)
473        return BAD_VALUE;
474    volatile surface_flinger_cblk_t const * cblk = get_cblk();
475    volatile display_cblk_t const * dcblk = cblk->displays + dpy;
476    return dcblk->w;
477}
478
479ssize_t SurfaceComposerClient::getDisplayHeight(DisplayID dpy)
480{
481    if (uint32_t(dpy)>=NUM_DISPLAY_MAX)
482        return BAD_VALUE;
483    volatile surface_flinger_cblk_t const * cblk = get_cblk();
484    volatile display_cblk_t const * dcblk = cblk->displays + dpy;
485    return dcblk->h;
486}
487
488ssize_t SurfaceComposerClient::getDisplayOrientation(DisplayID dpy)
489{
490    if (uint32_t(dpy)>=NUM_DISPLAY_MAX)
491        return BAD_VALUE;
492    volatile surface_flinger_cblk_t const * cblk = get_cblk();
493    volatile display_cblk_t const * dcblk = cblk->displays + dpy;
494    return dcblk->orientation;
495}
496
497ssize_t SurfaceComposerClient::getNumberOfDisplays()
498{
499    volatile surface_flinger_cblk_t const * cblk = get_cblk();
500    uint32_t connected = cblk->connected;
501    int n = 0;
502    while (connected) {
503        if (connected&1) n++;
504        connected >>= 1;
505    }
506    return n;
507}
508
509// ----------------------------------------------------------------------------
510
511status_t SurfaceComposerClient::freezeDisplay(DisplayID dpy, uint32_t flags)
512{
513    // This has been made a no-op because it can cause Gralloc buffer deadlocks.
514    return NO_ERROR;
515}
516
517status_t SurfaceComposerClient::unfreezeDisplay(DisplayID dpy, uint32_t flags)
518{
519    // This has been made a no-op because it can cause Gralloc buffer deadlocks.
520    return NO_ERROR;
521}
522
523// ----------------------------------------------------------------------------
524
525ScreenshotClient::ScreenshotClient()
526    : mWidth(0), mHeight(0), mFormat(PIXEL_FORMAT_NONE) {
527}
528
529status_t ScreenshotClient::update() {
530    sp<ISurfaceComposer> s(ComposerService::getComposerService());
531    if (s == NULL) return NO_INIT;
532    mHeap = 0;
533    return s->captureScreen(0, &mHeap,
534            &mWidth, &mHeight, &mFormat, 0, 0,
535            0, -1UL);
536}
537
538status_t ScreenshotClient::update(uint32_t reqWidth, uint32_t reqHeight) {
539    sp<ISurfaceComposer> s(ComposerService::getComposerService());
540    if (s == NULL) return NO_INIT;
541    mHeap = 0;
542    return s->captureScreen(0, &mHeap,
543            &mWidth, &mHeight, &mFormat, reqWidth, reqHeight,
544            0, -1UL);
545}
546
547status_t ScreenshotClient::update(uint32_t reqWidth, uint32_t reqHeight,
548        uint32_t minLayerZ, uint32_t maxLayerZ) {
549    sp<ISurfaceComposer> s(ComposerService::getComposerService());
550    if (s == NULL) return NO_INIT;
551    mHeap = 0;
552    return s->captureScreen(0, &mHeap,
553            &mWidth, &mHeight, &mFormat, reqWidth, reqHeight,
554            minLayerZ, maxLayerZ);
555}
556
557void ScreenshotClient::release() {
558    mHeap = 0;
559}
560
561void const* ScreenshotClient::getPixels() const {
562    return mHeap->getBase();
563}
564
565uint32_t ScreenshotClient::getWidth() const {
566    return mWidth;
567}
568
569uint32_t ScreenshotClient::getHeight() const {
570    return mHeight;
571}
572
573PixelFormat ScreenshotClient::getFormat() const {
574    return mFormat;
575}
576
577uint32_t ScreenshotClient::getStride() const {
578    return mWidth;
579}
580
581size_t ScreenshotClient::getSize() const {
582    return mHeap->getSize();
583}
584
585// ----------------------------------------------------------------------------
586}; // namespace android
587