Surface.cpp revision 4b49e08385a96398aa2633e096fe916dc9f08768 
1/*
2 * Copyright (C) 2010 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 "Surface"
18#define ATRACE_TAG ATRACE_TAG_GRAPHICS
19//#define LOG_NDEBUG 0
20
21#include <android/native_window.h>
22
23#include <binder/Parcel.h>
24
25#include <utils/Log.h>
26#include <utils/Trace.h>
27
28#include <ui/Fence.h>
29
30#include <gui/ISurfaceComposer.h>
31#include <gui/SurfaceComposerClient.h>
32#include <gui/GLConsumer.h>
33#include <gui/Surface.h>
34
35#include <private/gui/ComposerService.h>
36
37namespace android {
38
39Surface::Surface(
40        const sp<IGraphicBufferProducer>& bufferProducer,
41        bool controlledByApp)
42    : mGraphicBufferProducer(bufferProducer)
43{
44    // Initialize the ANativeWindow function pointers.
45    ANativeWindow::setSwapInterval  = hook_setSwapInterval;
46    ANativeWindow::dequeueBuffer    = hook_dequeueBuffer;
47    ANativeWindow::cancelBuffer     = hook_cancelBuffer;
48    ANativeWindow::queueBuffer      = hook_queueBuffer;
49    ANativeWindow::query            = hook_query;
50    ANativeWindow::perform          = hook_perform;
51
52    ANativeWindow::dequeueBuffer_DEPRECATED = hook_dequeueBuffer_DEPRECATED;
53    ANativeWindow::cancelBuffer_DEPRECATED  = hook_cancelBuffer_DEPRECATED;
54    ANativeWindow::lockBuffer_DEPRECATED    = hook_lockBuffer_DEPRECATED;
55    ANativeWindow::queueBuffer_DEPRECATED   = hook_queueBuffer_DEPRECATED;
56
57    const_cast<int&>(ANativeWindow::minSwapInterval) = 0;
58    const_cast<int&>(ANativeWindow::maxSwapInterval) = 1;
59
60    mReqWidth = 0;
61    mReqHeight = 0;
62    mReqFormat = 0;
63    mReqUsage = 0;
64    mTimestamp = NATIVE_WINDOW_TIMESTAMP_AUTO;
65    mCrop.clear();
66    mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
67    mTransform = 0;
68    mDefaultWidth = 0;
69    mDefaultHeight = 0;
70    mUserWidth = 0;
71    mUserHeight = 0;
72    mTransformHint = 0;
73    mConsumerRunningBehind = false;
74    mConnectedToCpu = false;
75    mProducerControlledByApp = true;
76    mSwapIntervalZero = false;
77}
78
79Surface::~Surface() {
80    if (mConnectedToCpu) {
81        Surface::disconnect(NATIVE_WINDOW_API_CPU);
82    }
83}
84
85sp<IGraphicBufferProducer> Surface::getIGraphicBufferProducer() const {
86    return mGraphicBufferProducer;
87}
88
89int Surface::hook_setSwapInterval(ANativeWindow* window, int interval) {
90    Surface* c = getSelf(window);
91    return c->setSwapInterval(interval);
92}
93
94int Surface::hook_dequeueBuffer(ANativeWindow* window,
95        ANativeWindowBuffer** buffer, int* fenceFd) {
96    Surface* c = getSelf(window);
97    return c->dequeueBuffer(buffer, fenceFd);
98}
99
100int Surface::hook_cancelBuffer(ANativeWindow* window,
101        ANativeWindowBuffer* buffer, int fenceFd) {
102    Surface* c = getSelf(window);
103    return c->cancelBuffer(buffer, fenceFd);
104}
105
106int Surface::hook_queueBuffer(ANativeWindow* window,
107        ANativeWindowBuffer* buffer, int fenceFd) {
108    Surface* c = getSelf(window);
109    return c->queueBuffer(buffer, fenceFd);
110}
111
112int Surface::hook_dequeueBuffer_DEPRECATED(ANativeWindow* window,
113        ANativeWindowBuffer** buffer) {
114    Surface* c = getSelf(window);
115    ANativeWindowBuffer* buf;
116    int fenceFd = -1;
117    int result = c->dequeueBuffer(&buf, &fenceFd);
118    sp<Fence> fence(new Fence(fenceFd));
119    int waitResult = fence->waitForever("dequeueBuffer_DEPRECATED");
120    if (waitResult != OK) {
121        ALOGE("dequeueBuffer_DEPRECATED: Fence::wait returned an error: %d",
122                waitResult);
123        c->cancelBuffer(buf, -1);
124        return waitResult;
125    }
126    *buffer = buf;
127    return result;
128}
129
130int Surface::hook_cancelBuffer_DEPRECATED(ANativeWindow* window,
131        ANativeWindowBuffer* buffer) {
132    Surface* c = getSelf(window);
133    return c->cancelBuffer(buffer, -1);
134}
135
136int Surface::hook_lockBuffer_DEPRECATED(ANativeWindow* window,
137        ANativeWindowBuffer* buffer) {
138    Surface* c = getSelf(window);
139    return c->lockBuffer_DEPRECATED(buffer);
140}
141
142int Surface::hook_queueBuffer_DEPRECATED(ANativeWindow* window,
143        ANativeWindowBuffer* buffer) {
144    Surface* c = getSelf(window);
145    return c->queueBuffer(buffer, -1);
146}
147
148int Surface::hook_query(const ANativeWindow* window,
149                                int what, int* value) {
150    const Surface* c = getSelf(window);
151    return c->query(what, value);
152}
153
154int Surface::hook_perform(ANativeWindow* window, int operation, ...) {
155    va_list args;
156    va_start(args, operation);
157    Surface* c = getSelf(window);
158    return c->perform(operation, args);
159}
160
161int Surface::setSwapInterval(int interval) {
162    ATRACE_CALL();
163    // EGL specification states:
164    //  interval is silently clamped to minimum and maximum implementation
165    //  dependent values before being stored.
166
167    if (interval < minSwapInterval)
168        interval = minSwapInterval;
169
170    if (interval > maxSwapInterval)
171        interval = maxSwapInterval;
172
173    mSwapIntervalZero = (interval == 0);
174
175    return NO_ERROR;
176}
177
178int Surface::dequeueBuffer(android_native_buffer_t** buffer,
179        int* fenceFd) {
180    ATRACE_CALL();
181    ALOGV("Surface::dequeueBuffer");
182    Mutex::Autolock lock(mMutex);
183    int buf = -1;
184    int reqW = mReqWidth ? mReqWidth : mUserWidth;
185    int reqH = mReqHeight ? mReqHeight : mUserHeight;
186    sp<Fence> fence;
187    status_t result = mGraphicBufferProducer->dequeueBuffer(&buf, &fence, mSwapIntervalZero,
188            reqW, reqH, mReqFormat, mReqUsage);
189    if (result < 0) {
190        ALOGV("dequeueBuffer: IGraphicBufferProducer::dequeueBuffer(%d, %d, %d, %d)"
191             "failed: %d", mReqWidth, mReqHeight, mReqFormat, mReqUsage,
192             result);
193        return result;
194    }
195    sp<GraphicBuffer>& gbuf(mSlots[buf].buffer);
196    if (result & IGraphicBufferProducer::RELEASE_ALL_BUFFERS) {
197        freeAllBuffers();
198    }
199
200    if ((result & IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION) || gbuf == 0) {
201        result = mGraphicBufferProducer->requestBuffer(buf, &gbuf);
202        if (result != NO_ERROR) {
203            ALOGE("dequeueBuffer: IGraphicBufferProducer::requestBuffer failed: %d",
204                    result);
205            return result;
206        }
207    }
208
209    if (fence->isValid()) {
210        *fenceFd = fence->dup();
211        if (*fenceFd == -1) {
212            ALOGE("dequeueBuffer: error duping fence: %d", errno);
213            // dup() should never fail; something is badly wrong. Soldier on
214            // and hope for the best; the worst that should happen is some
215            // visible corruption that lasts until the next frame.
216        }
217    } else {
218        *fenceFd = -1;
219    }
220
221    *buffer = gbuf.get();
222    return OK;
223}
224
225int Surface::cancelBuffer(android_native_buffer_t* buffer,
226        int fenceFd) {
227    ATRACE_CALL();
228    ALOGV("Surface::cancelBuffer");
229    Mutex::Autolock lock(mMutex);
230    int i = getSlotFromBufferLocked(buffer);
231    if (i < 0) {
232        return i;
233    }
234    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
235    mGraphicBufferProducer->cancelBuffer(i, fence);
236    return OK;
237}
238
239int Surface::getSlotFromBufferLocked(
240        android_native_buffer_t* buffer) const {
241    bool dumpedState = false;
242    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
243        if (mSlots[i].buffer != NULL &&
244                mSlots[i].buffer->handle == buffer->handle) {
245            return i;
246        }
247    }
248    ALOGE("getSlotFromBufferLocked: unknown buffer: %p", buffer->handle);
249    return BAD_VALUE;
250}
251
252int Surface::lockBuffer_DEPRECATED(android_native_buffer_t* buffer) {
253    ALOGV("Surface::lockBuffer");
254    Mutex::Autolock lock(mMutex);
255    return OK;
256}
257
258int Surface::queueBuffer(android_native_buffer_t* buffer, int fenceFd) {
259    ATRACE_CALL();
260    ALOGV("Surface::queueBuffer");
261    Mutex::Autolock lock(mMutex);
262    int64_t timestamp;
263    if (mTimestamp == NATIVE_WINDOW_TIMESTAMP_AUTO) {
264        timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
265        ALOGV("Surface::queueBuffer making up timestamp: %.2f ms",
266            timestamp / 1000000.f);
267    } else {
268        timestamp = mTimestamp;
269    }
270    int i = getSlotFromBufferLocked(buffer);
271    if (i < 0) {
272        return i;
273    }
274
275
276    // Make sure the crop rectangle is entirely inside the buffer.
277    Rect crop;
278    mCrop.intersect(Rect(buffer->width, buffer->height), &crop);
279
280    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
281    IGraphicBufferProducer::QueueBufferOutput output;
282    IGraphicBufferProducer::QueueBufferInput input(timestamp, crop, mScalingMode,
283            mTransform, mSwapIntervalZero, fence);
284    status_t err = mGraphicBufferProducer->queueBuffer(i, input, &output);
285    if (err != OK)  {
286        ALOGE("queueBuffer: error queuing buffer to SurfaceTexture, %d", err);
287    }
288    uint32_t numPendingBuffers = 0;
289    output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
290            &numPendingBuffers);
291
292    mConsumerRunningBehind = (numPendingBuffers >= 2);
293
294    return err;
295}
296
297int Surface::query(int what, int* value) const {
298    ATRACE_CALL();
299    ALOGV("Surface::query");
300    { // scope for the lock
301        Mutex::Autolock lock(mMutex);
302        switch (what) {
303            case NATIVE_WINDOW_FORMAT:
304                if (mReqFormat) {
305                    *value = mReqFormat;
306                    return NO_ERROR;
307                }
308                break;
309            case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER: {
310                sp<ISurfaceComposer> composer(
311                        ComposerService::getComposerService());
312                if (composer->authenticateSurfaceTexture(mGraphicBufferProducer)) {
313                    *value = 1;
314                } else {
315                    *value = 0;
316                }
317                return NO_ERROR;
318            }
319            case NATIVE_WINDOW_CONCRETE_TYPE:
320                *value = NATIVE_WINDOW_SURFACE;
321                return NO_ERROR;
322            case NATIVE_WINDOW_DEFAULT_WIDTH:
323                *value = mUserWidth ? mUserWidth : mDefaultWidth;
324                return NO_ERROR;
325            case NATIVE_WINDOW_DEFAULT_HEIGHT:
326                *value = mUserHeight ? mUserHeight : mDefaultHeight;
327                return NO_ERROR;
328            case NATIVE_WINDOW_TRANSFORM_HINT:
329                *value = mTransformHint;
330                return NO_ERROR;
331            case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND: {
332                status_t err = NO_ERROR;
333                if (!mConsumerRunningBehind) {
334                    *value = 0;
335                } else {
336                    err = mGraphicBufferProducer->query(what, value);
337                    if (err == NO_ERROR) {
338                        mConsumerRunningBehind = *value;
339                    }
340                }
341                return err;
342            }
343        }
344    }
345    return mGraphicBufferProducer->query(what, value);
346}
347
348int Surface::perform(int operation, va_list args)
349{
350    int res = NO_ERROR;
351    switch (operation) {
352    case NATIVE_WINDOW_CONNECT:
353        // deprecated. must return NO_ERROR.
354        break;
355    case NATIVE_WINDOW_DISCONNECT:
356        // deprecated. must return NO_ERROR.
357        break;
358    case NATIVE_WINDOW_SET_USAGE:
359        res = dispatchSetUsage(args);
360        break;
361    case NATIVE_WINDOW_SET_CROP:
362        res = dispatchSetCrop(args);
363        break;
364    case NATIVE_WINDOW_SET_BUFFER_COUNT:
365        res = dispatchSetBufferCount(args);
366        break;
367    case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
368        res = dispatchSetBuffersGeometry(args);
369        break;
370    case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
371        res = dispatchSetBuffersTransform(args);
372        break;
373    case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
374        res = dispatchSetBuffersTimestamp(args);
375        break;
376    case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
377        res = dispatchSetBuffersDimensions(args);
378        break;
379    case NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS:
380        res = dispatchSetBuffersUserDimensions(args);
381        break;
382    case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
383        res = dispatchSetBuffersFormat(args);
384        break;
385    case NATIVE_WINDOW_LOCK:
386        res = dispatchLock(args);
387        break;
388    case NATIVE_WINDOW_UNLOCK_AND_POST:
389        res = dispatchUnlockAndPost(args);
390        break;
391    case NATIVE_WINDOW_SET_SCALING_MODE:
392        res = dispatchSetScalingMode(args);
393        break;
394    case NATIVE_WINDOW_API_CONNECT:
395        res = dispatchConnect(args);
396        break;
397    case NATIVE_WINDOW_API_DISCONNECT:
398        res = dispatchDisconnect(args);
399        break;
400    default:
401        res = NAME_NOT_FOUND;
402        break;
403    }
404    return res;
405}
406
407int Surface::dispatchConnect(va_list args) {
408    int api = va_arg(args, int);
409    return connect(api);
410}
411
412int Surface::dispatchDisconnect(va_list args) {
413    int api = va_arg(args, int);
414    return disconnect(api);
415}
416
417int Surface::dispatchSetUsage(va_list args) {
418    int usage = va_arg(args, int);
419    return setUsage(usage);
420}
421
422int Surface::dispatchSetCrop(va_list args) {
423    android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
424    return setCrop(reinterpret_cast<Rect const*>(rect));
425}
426
427int Surface::dispatchSetBufferCount(va_list args) {
428    size_t bufferCount = va_arg(args, size_t);
429    return setBufferCount(bufferCount);
430}
431
432int Surface::dispatchSetBuffersGeometry(va_list args) {
433    int w = va_arg(args, int);
434    int h = va_arg(args, int);
435    int f = va_arg(args, int);
436    int err = setBuffersDimensions(w, h);
437    if (err != 0) {
438        return err;
439    }
440    return setBuffersFormat(f);
441}
442
443int Surface::dispatchSetBuffersDimensions(va_list args) {
444    int w = va_arg(args, int);
445    int h = va_arg(args, int);
446    return setBuffersDimensions(w, h);
447}
448
449int Surface::dispatchSetBuffersUserDimensions(va_list args) {
450    int w = va_arg(args, int);
451    int h = va_arg(args, int);
452    return setBuffersUserDimensions(w, h);
453}
454
455int Surface::dispatchSetBuffersFormat(va_list args) {
456    int f = va_arg(args, int);
457    return setBuffersFormat(f);
458}
459
460int Surface::dispatchSetScalingMode(va_list args) {
461    int m = va_arg(args, int);
462    return setScalingMode(m);
463}
464
465int Surface::dispatchSetBuffersTransform(va_list args) {
466    int transform = va_arg(args, int);
467    return setBuffersTransform(transform);
468}
469
470int Surface::dispatchSetBuffersTimestamp(va_list args) {
471    int64_t timestamp = va_arg(args, int64_t);
472    return setBuffersTimestamp(timestamp);
473}
474
475int Surface::dispatchLock(va_list args) {
476    ANativeWindow_Buffer* outBuffer = va_arg(args, ANativeWindow_Buffer*);
477    ARect* inOutDirtyBounds = va_arg(args, ARect*);
478    return lock(outBuffer, inOutDirtyBounds);
479}
480
481int Surface::dispatchUnlockAndPost(va_list args) {
482    return unlockAndPost();
483}
484
485
486int Surface::connect(int api) {
487    ATRACE_CALL();
488    ALOGV("Surface::connect");
489    Mutex::Autolock lock(mMutex);
490    IGraphicBufferProducer::QueueBufferOutput output;
491    int err = mGraphicBufferProducer->connect(api, mProducerControlledByApp, &output);
492    if (err == NO_ERROR) {
493        uint32_t numPendingBuffers = 0;
494        output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
495                &numPendingBuffers);
496        mConsumerRunningBehind = (numPendingBuffers >= 2);
497    }
498    if (!err && api == NATIVE_WINDOW_API_CPU) {
499        mConnectedToCpu = true;
500    }
501    return err;
502}
503
504int Surface::disconnect(int api) {
505    ATRACE_CALL();
506    ALOGV("Surface::disconnect");
507    Mutex::Autolock lock(mMutex);
508    freeAllBuffers();
509    int err = mGraphicBufferProducer->disconnect(api);
510    if (!err) {
511        mReqFormat = 0;
512        mReqWidth = 0;
513        mReqHeight = 0;
514        mReqUsage = 0;
515        mCrop.clear();
516        mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
517        mTransform = 0;
518        if (api == NATIVE_WINDOW_API_CPU) {
519            mConnectedToCpu = false;
520        }
521    }
522    return err;
523}
524
525int Surface::setUsage(uint32_t reqUsage)
526{
527    ALOGV("Surface::setUsage");
528    Mutex::Autolock lock(mMutex);
529    mReqUsage = reqUsage;
530    return OK;
531}
532
533int Surface::setCrop(Rect const* rect)
534{
535    ATRACE_CALL();
536
537    Rect realRect;
538    if (rect == NULL || rect->isEmpty()) {
539        realRect.clear();
540    } else {
541        realRect = *rect;
542    }
543
544    ALOGV("Surface::setCrop rect=[%d %d %d %d]",
545            realRect.left, realRect.top, realRect.right, realRect.bottom);
546
547    Mutex::Autolock lock(mMutex);
548    mCrop = realRect;
549    return NO_ERROR;
550}
551
552int Surface::setBufferCount(int bufferCount)
553{
554    ATRACE_CALL();
555    ALOGV("Surface::setBufferCount");
556    Mutex::Autolock lock(mMutex);
557
558    status_t err = mGraphicBufferProducer->setBufferCount(bufferCount);
559    ALOGE_IF(err, "IGraphicBufferProducer::setBufferCount(%d) returned %s",
560            bufferCount, strerror(-err));
561
562    if (err == NO_ERROR) {
563        freeAllBuffers();
564    }
565
566    return err;
567}
568
569int Surface::setBuffersDimensions(int w, int h)
570{
571    ATRACE_CALL();
572    ALOGV("Surface::setBuffersDimensions");
573
574    if (w<0 || h<0)
575        return BAD_VALUE;
576
577    if ((w && !h) || (!w && h))
578        return BAD_VALUE;
579
580    Mutex::Autolock lock(mMutex);
581    mReqWidth = w;
582    mReqHeight = h;
583    return NO_ERROR;
584}
585
586int Surface::setBuffersUserDimensions(int w, int h)
587{
588    ATRACE_CALL();
589    ALOGV("Surface::setBuffersUserDimensions");
590
591    if (w<0 || h<0)
592        return BAD_VALUE;
593
594    if ((w && !h) || (!w && h))
595        return BAD_VALUE;
596
597    Mutex::Autolock lock(mMutex);
598    mUserWidth = w;
599    mUserHeight = h;
600    return NO_ERROR;
601}
602
603int Surface::setBuffersFormat(int format)
604{
605    ALOGV("Surface::setBuffersFormat");
606
607    if (format<0)
608        return BAD_VALUE;
609
610    Mutex::Autolock lock(mMutex);
611    mReqFormat = format;
612    return NO_ERROR;
613}
614
615int Surface::setScalingMode(int mode)
616{
617    ATRACE_CALL();
618    ALOGV("Surface::setScalingMode(%d)", mode);
619
620    switch (mode) {
621        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
622        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
623        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
624            break;
625        default:
626            ALOGE("unknown scaling mode: %d", mode);
627            return BAD_VALUE;
628    }
629
630    Mutex::Autolock lock(mMutex);
631    mScalingMode = mode;
632    return NO_ERROR;
633}
634
635int Surface::setBuffersTransform(int transform)
636{
637    ATRACE_CALL();
638    ALOGV("Surface::setBuffersTransform");
639    Mutex::Autolock lock(mMutex);
640    mTransform = transform;
641    return NO_ERROR;
642}
643
644int Surface::setBuffersTimestamp(int64_t timestamp)
645{
646    ALOGV("Surface::setBuffersTimestamp");
647    Mutex::Autolock lock(mMutex);
648    mTimestamp = timestamp;
649    return NO_ERROR;
650}
651
652void Surface::freeAllBuffers() {
653    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
654        mSlots[i].buffer = 0;
655    }
656}
657
658// ----------------------------------------------------------------------
659// the lock/unlock APIs must be used from the same thread
660
661static status_t copyBlt(
662        const sp<GraphicBuffer>& dst,
663        const sp<GraphicBuffer>& src,
664        const Region& reg)
665{
666    // src and dst with, height and format must be identical. no verification
667    // is done here.
668    status_t err;
669    uint8_t const * src_bits = NULL;
670    err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(), (void**)&src_bits);
671    ALOGE_IF(err, "error locking src buffer %s", strerror(-err));
672
673    uint8_t* dst_bits = NULL;
674    err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(), (void**)&dst_bits);
675    ALOGE_IF(err, "error locking dst buffer %s", strerror(-err));
676
677    Region::const_iterator head(reg.begin());
678    Region::const_iterator tail(reg.end());
679    if (head != tail && src_bits && dst_bits) {
680        const size_t bpp = bytesPerPixel(src->format);
681        const size_t dbpr = dst->stride * bpp;
682        const size_t sbpr = src->stride * bpp;
683
684        while (head != tail) {
685            const Rect& r(*head++);
686            ssize_t h = r.height();
687            if (h <= 0) continue;
688            size_t size = r.width() * bpp;
689            uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
690            uint8_t       * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
691            if (dbpr==sbpr && size==sbpr) {
692                size *= h;
693                h = 1;
694            }
695            do {
696                memcpy(d, s, size);
697                d += dbpr;
698                s += sbpr;
699            } while (--h > 0);
700        }
701    }
702
703    if (src_bits)
704        src->unlock();
705
706    if (dst_bits)
707        dst->unlock();
708
709    return err;
710}
711
712// ----------------------------------------------------------------------------
713
714status_t Surface::lock(
715        ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds)
716{
717    if (mLockedBuffer != 0) {
718        ALOGE("Surface::lock failed, already locked");
719        return INVALID_OPERATION;
720    }
721
722    if (!mConnectedToCpu) {
723        int err = Surface::connect(NATIVE_WINDOW_API_CPU);
724        if (err) {
725            return err;
726        }
727        // we're intending to do software rendering from this point
728        setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
729    }
730
731    ANativeWindowBuffer* out;
732    int fenceFd = -1;
733    status_t err = dequeueBuffer(&out, &fenceFd);
734    ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
735    if (err == NO_ERROR) {
736        sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
737        sp<Fence> fence(new Fence(fenceFd));
738
739        err = fence->waitForever("Surface::lock");
740        if (err != OK) {
741            ALOGE("Fence::wait failed (%s)", strerror(-err));
742            cancelBuffer(out, fenceFd);
743            return err;
744        }
745
746        const Rect bounds(backBuffer->width, backBuffer->height);
747
748        Region newDirtyRegion;
749        if (inOutDirtyBounds) {
750            newDirtyRegion.set(static_cast<Rect const&>(*inOutDirtyBounds));
751            newDirtyRegion.andSelf(bounds);
752        } else {
753            newDirtyRegion.set(bounds);
754        }
755
756        // figure out if we can copy the frontbuffer back
757        const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
758        const bool canCopyBack = (frontBuffer != 0 &&
759                backBuffer->width  == frontBuffer->width &&
760                backBuffer->height == frontBuffer->height &&
761                backBuffer->format == frontBuffer->format);
762
763        if (canCopyBack) {
764            // copy the area that is invalid and not repainted this round
765            const Region copyback(mDirtyRegion.subtract(newDirtyRegion));
766            if (!copyback.isEmpty())
767                copyBlt(backBuffer, frontBuffer, copyback);
768        } else {
769            // if we can't copy-back anything, modify the user's dirty
770            // region to make sure they redraw the whole buffer
771            newDirtyRegion.set(bounds);
772            mDirtyRegion.clear();
773            Mutex::Autolock lock(mMutex);
774            for (size_t i=0 ; i<NUM_BUFFER_SLOTS ; i++) {
775                mSlots[i].dirtyRegion.clear();
776            }
777        }
778
779
780        { // scope for the lock
781            Mutex::Autolock lock(mMutex);
782            int backBufferSlot(getSlotFromBufferLocked(backBuffer.get()));
783            if (backBufferSlot >= 0) {
784                Region& dirtyRegion(mSlots[backBufferSlot].dirtyRegion);
785                mDirtyRegion.subtract(dirtyRegion);
786                dirtyRegion = newDirtyRegion;
787            }
788        }
789
790        mDirtyRegion.orSelf(newDirtyRegion);
791        if (inOutDirtyBounds) {
792            *inOutDirtyBounds = newDirtyRegion.getBounds();
793        }
794
795        void* vaddr;
796        status_t res = backBuffer->lock(
797                GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
798                newDirtyRegion.bounds(), &vaddr);
799
800        ALOGW_IF(res, "failed locking buffer (handle = %p)",
801                backBuffer->handle);
802
803        if (res != 0) {
804            err = INVALID_OPERATION;
805        } else {
806            mLockedBuffer = backBuffer;
807            outBuffer->width  = backBuffer->width;
808            outBuffer->height = backBuffer->height;
809            outBuffer->stride = backBuffer->stride;
810            outBuffer->format = backBuffer->format;
811            outBuffer->bits   = vaddr;
812        }
813    }
814    return err;
815}
816
817status_t Surface::unlockAndPost()
818{
819    if (mLockedBuffer == 0) {
820        ALOGE("Surface::unlockAndPost failed, no locked buffer");
821        return INVALID_OPERATION;
822    }
823
824    status_t err = mLockedBuffer->unlock();
825    ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
826
827    err = queueBuffer(mLockedBuffer.get(), -1);
828    ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
829            mLockedBuffer->handle, strerror(-err));
830
831    mPostedBuffer = mLockedBuffer;
832    mLockedBuffer = 0;
833    return err;
834}
835
836}; // namespace android
837