Surface.cpp revision 0ee14ca23dc2759e213172e38a840da0c36bd3ab 
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 = controlledByApp;
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
89void Surface::setSidebandStream(const sp<NativeHandle>& stream) {
90    mGraphicBufferProducer->setSidebandStream(stream);
91}
92
93int Surface::hook_setSwapInterval(ANativeWindow* window, int interval) {
94    Surface* c = getSelf(window);
95    return c->setSwapInterval(interval);
96}
97
98int Surface::hook_dequeueBuffer(ANativeWindow* window,
99        ANativeWindowBuffer** buffer, int* fenceFd) {
100    Surface* c = getSelf(window);
101    return c->dequeueBuffer(buffer, fenceFd);
102}
103
104int Surface::hook_cancelBuffer(ANativeWindow* window,
105        ANativeWindowBuffer* buffer, int fenceFd) {
106    Surface* c = getSelf(window);
107    return c->cancelBuffer(buffer, fenceFd);
108}
109
110int Surface::hook_queueBuffer(ANativeWindow* window,
111        ANativeWindowBuffer* buffer, int fenceFd) {
112    Surface* c = getSelf(window);
113    return c->queueBuffer(buffer, fenceFd);
114}
115
116int Surface::hook_dequeueBuffer_DEPRECATED(ANativeWindow* window,
117        ANativeWindowBuffer** buffer) {
118    Surface* c = getSelf(window);
119    ANativeWindowBuffer* buf;
120    int fenceFd = -1;
121    int result = c->dequeueBuffer(&buf, &fenceFd);
122    sp<Fence> fence(new Fence(fenceFd));
123    int waitResult = fence->waitForever("dequeueBuffer_DEPRECATED");
124    if (waitResult != OK) {
125        ALOGE("dequeueBuffer_DEPRECATED: Fence::wait returned an error: %d",
126                waitResult);
127        c->cancelBuffer(buf, -1);
128        return waitResult;
129    }
130    *buffer = buf;
131    return result;
132}
133
134int Surface::hook_cancelBuffer_DEPRECATED(ANativeWindow* window,
135        ANativeWindowBuffer* buffer) {
136    Surface* c = getSelf(window);
137    return c->cancelBuffer(buffer, -1);
138}
139
140int Surface::hook_lockBuffer_DEPRECATED(ANativeWindow* window,
141        ANativeWindowBuffer* buffer) {
142    Surface* c = getSelf(window);
143    return c->lockBuffer_DEPRECATED(buffer);
144}
145
146int Surface::hook_queueBuffer_DEPRECATED(ANativeWindow* window,
147        ANativeWindowBuffer* buffer) {
148    Surface* c = getSelf(window);
149    return c->queueBuffer(buffer, -1);
150}
151
152int Surface::hook_query(const ANativeWindow* window,
153                                int what, int* value) {
154    const Surface* c = getSelf(window);
155    return c->query(what, value);
156}
157
158int Surface::hook_perform(ANativeWindow* window, int operation, ...) {
159    va_list args;
160    va_start(args, operation);
161    Surface* c = getSelf(window);
162    return c->perform(operation, args);
163}
164
165int Surface::setSwapInterval(int interval) {
166    ATRACE_CALL();
167    // EGL specification states:
168    //  interval is silently clamped to minimum and maximum implementation
169    //  dependent values before being stored.
170
171    if (interval < minSwapInterval)
172        interval = minSwapInterval;
173
174    if (interval > maxSwapInterval)
175        interval = maxSwapInterval;
176
177    mSwapIntervalZero = (interval == 0);
178
179    return NO_ERROR;
180}
181
182int Surface::dequeueBuffer(android_native_buffer_t** buffer, int* fenceFd) {
183    ATRACE_CALL();
184    ALOGV("Surface::dequeueBuffer");
185
186    int reqW;
187    int reqH;
188    bool swapIntervalZero;
189    uint32_t reqFormat;
190    uint32_t reqUsage;
191
192    {
193        Mutex::Autolock lock(mMutex);
194
195        reqW = mReqWidth ? mReqWidth : mUserWidth;
196        reqH = mReqHeight ? mReqHeight : mUserHeight;
197
198        swapIntervalZero = mSwapIntervalZero;
199        reqFormat = mReqFormat;
200        reqUsage = mReqUsage;
201    } // Drop the lock so that we can still touch the Surface while blocking in IGBP::dequeueBuffer
202
203    int buf = -1;
204    sp<Fence> fence;
205    status_t result = mGraphicBufferProducer->dequeueBuffer(&buf, &fence, swapIntervalZero,
206            reqW, reqH, reqFormat, reqUsage);
207
208    if (result < 0) {
209        ALOGV("dequeueBuffer: IGraphicBufferProducer::dequeueBuffer(%d, %d, %d, %d, %d)"
210             "failed: %d", swapIntervalZero, reqW, reqH, reqFormat, reqUsage,
211             result);
212        return result;
213    }
214
215    Mutex::Autolock lock(mMutex);
216
217    sp<GraphicBuffer>& gbuf(mSlots[buf].buffer);
218
219    // this should never happen
220    ALOGE_IF(fence == NULL, "Surface::dequeueBuffer: received null Fence! buf=%d", buf);
221
222    if (result & IGraphicBufferProducer::RELEASE_ALL_BUFFERS) {
223        freeAllBuffers();
224    }
225
226    if ((result & IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION) || gbuf == 0) {
227        result = mGraphicBufferProducer->requestBuffer(buf, &gbuf);
228        if (result != NO_ERROR) {
229            ALOGE("dequeueBuffer: IGraphicBufferProducer::requestBuffer failed: %d", result);
230            return result;
231        }
232    }
233
234    if (fence->isValid()) {
235        *fenceFd = fence->dup();
236        if (*fenceFd == -1) {
237            ALOGE("dequeueBuffer: error duping fence: %d", errno);
238            // dup() should never fail; something is badly wrong. Soldier on
239            // and hope for the best; the worst that should happen is some
240            // visible corruption that lasts until the next frame.
241        }
242    } else {
243        *fenceFd = -1;
244    }
245
246    *buffer = gbuf.get();
247    return OK;
248}
249
250int Surface::cancelBuffer(android_native_buffer_t* buffer,
251        int fenceFd) {
252    ATRACE_CALL();
253    ALOGV("Surface::cancelBuffer");
254    Mutex::Autolock lock(mMutex);
255    int i = getSlotFromBufferLocked(buffer);
256    if (i < 0) {
257        return i;
258    }
259    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
260    mGraphicBufferProducer->cancelBuffer(i, fence);
261    return OK;
262}
263
264int Surface::getSlotFromBufferLocked(
265        android_native_buffer_t* buffer) const {
266    bool dumpedState = false;
267    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
268        if (mSlots[i].buffer != NULL &&
269                mSlots[i].buffer->handle == buffer->handle) {
270            return i;
271        }
272    }
273    ALOGE("getSlotFromBufferLocked: unknown buffer: %p", buffer->handle);
274    return BAD_VALUE;
275}
276
277int Surface::lockBuffer_DEPRECATED(android_native_buffer_t* buffer __attribute__((unused))) {
278    ALOGV("Surface::lockBuffer");
279    Mutex::Autolock lock(mMutex);
280    return OK;
281}
282
283int Surface::queueBuffer(android_native_buffer_t* buffer, int fenceFd) {
284    ATRACE_CALL();
285    ALOGV("Surface::queueBuffer");
286    Mutex::Autolock lock(mMutex);
287    int64_t timestamp;
288    bool isAutoTimestamp = false;
289    if (mTimestamp == NATIVE_WINDOW_TIMESTAMP_AUTO) {
290        timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
291        isAutoTimestamp = true;
292        ALOGV("Surface::queueBuffer making up timestamp: %.2f ms",
293            timestamp / 1000000.f);
294    } else {
295        timestamp = mTimestamp;
296    }
297    int i = getSlotFromBufferLocked(buffer);
298    if (i < 0) {
299        return i;
300    }
301
302
303    // Make sure the crop rectangle is entirely inside the buffer.
304    Rect crop;
305    mCrop.intersect(Rect(buffer->width, buffer->height), &crop);
306
307    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
308    IGraphicBufferProducer::QueueBufferOutput output;
309    IGraphicBufferProducer::QueueBufferInput input(timestamp, isAutoTimestamp,
310            crop, mScalingMode, mTransform, mSwapIntervalZero, fence);
311    status_t err = mGraphicBufferProducer->queueBuffer(i, input, &output);
312    if (err != OK)  {
313        ALOGE("queueBuffer: error queuing buffer to SurfaceTexture, %d", err);
314    }
315    uint32_t numPendingBuffers = 0;
316    output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
317            &numPendingBuffers);
318
319    mConsumerRunningBehind = (numPendingBuffers >= 2);
320
321    return err;
322}
323
324int Surface::query(int what, int* value) const {
325    ATRACE_CALL();
326    ALOGV("Surface::query");
327    { // scope for the lock
328        Mutex::Autolock lock(mMutex);
329        switch (what) {
330            case NATIVE_WINDOW_FORMAT:
331                if (mReqFormat) {
332                    *value = mReqFormat;
333                    return NO_ERROR;
334                }
335                break;
336            case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER: {
337                sp<ISurfaceComposer> composer(
338                        ComposerService::getComposerService());
339                if (composer->authenticateSurfaceTexture(mGraphicBufferProducer)) {
340                    *value = 1;
341                } else {
342                    *value = 0;
343                }
344                return NO_ERROR;
345            }
346            case NATIVE_WINDOW_CONCRETE_TYPE:
347                *value = NATIVE_WINDOW_SURFACE;
348                return NO_ERROR;
349            case NATIVE_WINDOW_DEFAULT_WIDTH:
350                *value = mUserWidth ? mUserWidth : mDefaultWidth;
351                return NO_ERROR;
352            case NATIVE_WINDOW_DEFAULT_HEIGHT:
353                *value = mUserHeight ? mUserHeight : mDefaultHeight;
354                return NO_ERROR;
355            case NATIVE_WINDOW_TRANSFORM_HINT:
356                *value = mTransformHint;
357                return NO_ERROR;
358            case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND: {
359                status_t err = NO_ERROR;
360                if (!mConsumerRunningBehind) {
361                    *value = 0;
362                } else {
363                    err = mGraphicBufferProducer->query(what, value);
364                    if (err == NO_ERROR) {
365                        mConsumerRunningBehind = *value;
366                    }
367                }
368                return err;
369            }
370        }
371    }
372    return mGraphicBufferProducer->query(what, value);
373}
374
375int Surface::perform(int operation, va_list args)
376{
377    int res = NO_ERROR;
378    switch (operation) {
379    case NATIVE_WINDOW_CONNECT:
380        // deprecated. must return NO_ERROR.
381        break;
382    case NATIVE_WINDOW_DISCONNECT:
383        // deprecated. must return NO_ERROR.
384        break;
385    case NATIVE_WINDOW_SET_USAGE:
386        res = dispatchSetUsage(args);
387        break;
388    case NATIVE_WINDOW_SET_CROP:
389        res = dispatchSetCrop(args);
390        break;
391    case NATIVE_WINDOW_SET_BUFFER_COUNT:
392        res = dispatchSetBufferCount(args);
393        break;
394    case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
395        res = dispatchSetBuffersGeometry(args);
396        break;
397    case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
398        res = dispatchSetBuffersTransform(args);
399        break;
400    case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
401        res = dispatchSetBuffersTimestamp(args);
402        break;
403    case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
404        res = dispatchSetBuffersDimensions(args);
405        break;
406    case NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS:
407        res = dispatchSetBuffersUserDimensions(args);
408        break;
409    case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
410        res = dispatchSetBuffersFormat(args);
411        break;
412    case NATIVE_WINDOW_LOCK:
413        res = dispatchLock(args);
414        break;
415    case NATIVE_WINDOW_UNLOCK_AND_POST:
416        res = dispatchUnlockAndPost(args);
417        break;
418    case NATIVE_WINDOW_SET_SCALING_MODE:
419        res = dispatchSetScalingMode(args);
420        break;
421    case NATIVE_WINDOW_API_CONNECT:
422        res = dispatchConnect(args);
423        break;
424    case NATIVE_WINDOW_API_DISCONNECT:
425        res = dispatchDisconnect(args);
426        break;
427    default:
428        res = NAME_NOT_FOUND;
429        break;
430    }
431    return res;
432}
433
434int Surface::dispatchConnect(va_list args) {
435    int api = va_arg(args, int);
436    return connect(api);
437}
438
439int Surface::dispatchDisconnect(va_list args) {
440    int api = va_arg(args, int);
441    return disconnect(api);
442}
443
444int Surface::dispatchSetUsage(va_list args) {
445    int usage = va_arg(args, int);
446    return setUsage(usage);
447}
448
449int Surface::dispatchSetCrop(va_list args) {
450    android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
451    return setCrop(reinterpret_cast<Rect const*>(rect));
452}
453
454int Surface::dispatchSetBufferCount(va_list args) {
455    size_t bufferCount = va_arg(args, size_t);
456    return setBufferCount(bufferCount);
457}
458
459int Surface::dispatchSetBuffersGeometry(va_list args) {
460    int w = va_arg(args, int);
461    int h = va_arg(args, int);
462    int f = va_arg(args, int);
463    int err = setBuffersDimensions(w, h);
464    if (err != 0) {
465        return err;
466    }
467    return setBuffersFormat(f);
468}
469
470int Surface::dispatchSetBuffersDimensions(va_list args) {
471    int w = va_arg(args, int);
472    int h = va_arg(args, int);
473    return setBuffersDimensions(w, h);
474}
475
476int Surface::dispatchSetBuffersUserDimensions(va_list args) {
477    int w = va_arg(args, int);
478    int h = va_arg(args, int);
479    return setBuffersUserDimensions(w, h);
480}
481
482int Surface::dispatchSetBuffersFormat(va_list args) {
483    int f = va_arg(args, int);
484    return setBuffersFormat(f);
485}
486
487int Surface::dispatchSetScalingMode(va_list args) {
488    int m = va_arg(args, int);
489    return setScalingMode(m);
490}
491
492int Surface::dispatchSetBuffersTransform(va_list args) {
493    int transform = va_arg(args, int);
494    return setBuffersTransform(transform);
495}
496
497int Surface::dispatchSetBuffersTimestamp(va_list args) {
498    int64_t timestamp = va_arg(args, int64_t);
499    return setBuffersTimestamp(timestamp);
500}
501
502int Surface::dispatchLock(va_list args) {
503    ANativeWindow_Buffer* outBuffer = va_arg(args, ANativeWindow_Buffer*);
504    ARect* inOutDirtyBounds = va_arg(args, ARect*);
505    return lock(outBuffer, inOutDirtyBounds);
506}
507
508int Surface::dispatchUnlockAndPost(va_list args __attribute__((unused))) {
509    return unlockAndPost();
510}
511
512
513int Surface::connect(int api) {
514    ATRACE_CALL();
515    ALOGV("Surface::connect");
516    static sp<BBinder> sLife = new BBinder();
517    Mutex::Autolock lock(mMutex);
518    IGraphicBufferProducer::QueueBufferOutput output;
519    int err = mGraphicBufferProducer->connect(sLife, api, mProducerControlledByApp, &output);
520    if (err == NO_ERROR) {
521        uint32_t numPendingBuffers = 0;
522        output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
523                &numPendingBuffers);
524        mConsumerRunningBehind = (numPendingBuffers >= 2);
525    }
526    if (!err && api == NATIVE_WINDOW_API_CPU) {
527        mConnectedToCpu = true;
528    }
529    return err;
530}
531
532
533int Surface::disconnect(int api) {
534    ATRACE_CALL();
535    ALOGV("Surface::disconnect");
536    Mutex::Autolock lock(mMutex);
537    freeAllBuffers();
538    int err = mGraphicBufferProducer->disconnect(api);
539    if (!err) {
540        mReqFormat = 0;
541        mReqWidth = 0;
542        mReqHeight = 0;
543        mReqUsage = 0;
544        mCrop.clear();
545        mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
546        mTransform = 0;
547        if (api == NATIVE_WINDOW_API_CPU) {
548            mConnectedToCpu = false;
549        }
550    }
551    return err;
552}
553
554int Surface::setUsage(uint32_t reqUsage)
555{
556    ALOGV("Surface::setUsage");
557    Mutex::Autolock lock(mMutex);
558    mReqUsage = reqUsage;
559    return OK;
560}
561
562int Surface::setCrop(Rect const* rect)
563{
564    ATRACE_CALL();
565
566    Rect realRect;
567    if (rect == NULL || rect->isEmpty()) {
568        realRect.clear();
569    } else {
570        realRect = *rect;
571    }
572
573    ALOGV("Surface::setCrop rect=[%d %d %d %d]",
574            realRect.left, realRect.top, realRect.right, realRect.bottom);
575
576    Mutex::Autolock lock(mMutex);
577    mCrop = realRect;
578    return NO_ERROR;
579}
580
581int Surface::setBufferCount(int bufferCount)
582{
583    ATRACE_CALL();
584    ALOGV("Surface::setBufferCount");
585    Mutex::Autolock lock(mMutex);
586
587    status_t err = mGraphicBufferProducer->setBufferCount(bufferCount);
588    ALOGE_IF(err, "IGraphicBufferProducer::setBufferCount(%d) returned %s",
589            bufferCount, strerror(-err));
590
591    if (err == NO_ERROR) {
592        freeAllBuffers();
593    }
594
595    return err;
596}
597
598int Surface::setBuffersDimensions(int w, int h)
599{
600    ATRACE_CALL();
601    ALOGV("Surface::setBuffersDimensions");
602
603    if (w<0 || h<0)
604        return BAD_VALUE;
605
606    if ((w && !h) || (!w && h))
607        return BAD_VALUE;
608
609    Mutex::Autolock lock(mMutex);
610    mReqWidth = w;
611    mReqHeight = h;
612    return NO_ERROR;
613}
614
615int Surface::setBuffersUserDimensions(int w, int h)
616{
617    ATRACE_CALL();
618    ALOGV("Surface::setBuffersUserDimensions");
619
620    if (w<0 || h<0)
621        return BAD_VALUE;
622
623    if ((w && !h) || (!w && h))
624        return BAD_VALUE;
625
626    Mutex::Autolock lock(mMutex);
627    mUserWidth = w;
628    mUserHeight = h;
629    return NO_ERROR;
630}
631
632int Surface::setBuffersFormat(int format)
633{
634    ALOGV("Surface::setBuffersFormat");
635
636    if (format<0)
637        return BAD_VALUE;
638
639    Mutex::Autolock lock(mMutex);
640    mReqFormat = format;
641    return NO_ERROR;
642}
643
644int Surface::setScalingMode(int mode)
645{
646    ATRACE_CALL();
647    ALOGV("Surface::setScalingMode(%d)", mode);
648
649    switch (mode) {
650        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
651        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
652        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
653            break;
654        default:
655            ALOGE("unknown scaling mode: %d", mode);
656            return BAD_VALUE;
657    }
658
659    Mutex::Autolock lock(mMutex);
660    mScalingMode = mode;
661    return NO_ERROR;
662}
663
664int Surface::setBuffersTransform(int transform)
665{
666    ATRACE_CALL();
667    ALOGV("Surface::setBuffersTransform");
668    Mutex::Autolock lock(mMutex);
669    mTransform = transform;
670    return NO_ERROR;
671}
672
673int Surface::setBuffersTimestamp(int64_t timestamp)
674{
675    ALOGV("Surface::setBuffersTimestamp");
676    Mutex::Autolock lock(mMutex);
677    mTimestamp = timestamp;
678    return NO_ERROR;
679}
680
681void Surface::freeAllBuffers() {
682    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
683        mSlots[i].buffer = 0;
684    }
685}
686
687// ----------------------------------------------------------------------
688// the lock/unlock APIs must be used from the same thread
689
690static status_t copyBlt(
691        const sp<GraphicBuffer>& dst,
692        const sp<GraphicBuffer>& src,
693        const Region& reg)
694{
695    // src and dst with, height and format must be identical. no verification
696    // is done here.
697    status_t err;
698    uint8_t const * src_bits = NULL;
699    err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(), (void**)&src_bits);
700    ALOGE_IF(err, "error locking src buffer %s", strerror(-err));
701
702    uint8_t* dst_bits = NULL;
703    err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(), (void**)&dst_bits);
704    ALOGE_IF(err, "error locking dst buffer %s", strerror(-err));
705
706    Region::const_iterator head(reg.begin());
707    Region::const_iterator tail(reg.end());
708    if (head != tail && src_bits && dst_bits) {
709        const size_t bpp = bytesPerPixel(src->format);
710        const size_t dbpr = dst->stride * bpp;
711        const size_t sbpr = src->stride * bpp;
712
713        while (head != tail) {
714            const Rect& r(*head++);
715            ssize_t h = r.height();
716            if (h <= 0) continue;
717            size_t size = r.width() * bpp;
718            uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
719            uint8_t       * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
720            if (dbpr==sbpr && size==sbpr) {
721                size *= h;
722                h = 1;
723            }
724            do {
725                memcpy(d, s, size);
726                d += dbpr;
727                s += sbpr;
728            } while (--h > 0);
729        }
730    }
731
732    if (src_bits)
733        src->unlock();
734
735    if (dst_bits)
736        dst->unlock();
737
738    return err;
739}
740
741// ----------------------------------------------------------------------------
742
743status_t Surface::lock(
744        ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds)
745{
746    if (mLockedBuffer != 0) {
747        ALOGE("Surface::lock failed, already locked");
748        return INVALID_OPERATION;
749    }
750
751    if (!mConnectedToCpu) {
752        int err = Surface::connect(NATIVE_WINDOW_API_CPU);
753        if (err) {
754            return err;
755        }
756        // we're intending to do software rendering from this point
757        setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
758    }
759
760    ANativeWindowBuffer* out;
761    int fenceFd = -1;
762    status_t err = dequeueBuffer(&out, &fenceFd);
763    ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
764    if (err == NO_ERROR) {
765        sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
766        sp<Fence> fence(new Fence(fenceFd));
767
768        err = fence->waitForever("Surface::lock");
769        if (err != OK) {
770            ALOGE("Fence::wait failed (%s)", strerror(-err));
771            cancelBuffer(out, fenceFd);
772            return err;
773        }
774
775        const Rect bounds(backBuffer->width, backBuffer->height);
776
777        Region newDirtyRegion;
778        if (inOutDirtyBounds) {
779            newDirtyRegion.set(static_cast<Rect const&>(*inOutDirtyBounds));
780            newDirtyRegion.andSelf(bounds);
781        } else {
782            newDirtyRegion.set(bounds);
783        }
784
785        // figure out if we can copy the frontbuffer back
786        const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
787        const bool canCopyBack = (frontBuffer != 0 &&
788                backBuffer->width  == frontBuffer->width &&
789                backBuffer->height == frontBuffer->height &&
790                backBuffer->format == frontBuffer->format);
791
792        if (canCopyBack) {
793            // copy the area that is invalid and not repainted this round
794            const Region copyback(mDirtyRegion.subtract(newDirtyRegion));
795            if (!copyback.isEmpty())
796                copyBlt(backBuffer, frontBuffer, copyback);
797        } else {
798            // if we can't copy-back anything, modify the user's dirty
799            // region to make sure they redraw the whole buffer
800            newDirtyRegion.set(bounds);
801            mDirtyRegion.clear();
802            Mutex::Autolock lock(mMutex);
803            for (size_t i=0 ; i<NUM_BUFFER_SLOTS ; i++) {
804                mSlots[i].dirtyRegion.clear();
805            }
806        }
807
808
809        { // scope for the lock
810            Mutex::Autolock lock(mMutex);
811            int backBufferSlot(getSlotFromBufferLocked(backBuffer.get()));
812            if (backBufferSlot >= 0) {
813                Region& dirtyRegion(mSlots[backBufferSlot].dirtyRegion);
814                mDirtyRegion.subtract(dirtyRegion);
815                dirtyRegion = newDirtyRegion;
816            }
817        }
818
819        mDirtyRegion.orSelf(newDirtyRegion);
820        if (inOutDirtyBounds) {
821            *inOutDirtyBounds = newDirtyRegion.getBounds();
822        }
823
824        void* vaddr;
825        status_t res = backBuffer->lock(
826                GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
827                newDirtyRegion.bounds(), &vaddr);
828
829        ALOGW_IF(res, "failed locking buffer (handle = %p)",
830                backBuffer->handle);
831
832        if (res != 0) {
833            err = INVALID_OPERATION;
834        } else {
835            mLockedBuffer = backBuffer;
836            outBuffer->width  = backBuffer->width;
837            outBuffer->height = backBuffer->height;
838            outBuffer->stride = backBuffer->stride;
839            outBuffer->format = backBuffer->format;
840            outBuffer->bits   = vaddr;
841        }
842    }
843    return err;
844}
845
846status_t Surface::unlockAndPost()
847{
848    if (mLockedBuffer == 0) {
849        ALOGE("Surface::unlockAndPost failed, no locked buffer");
850        return INVALID_OPERATION;
851    }
852
853    status_t err = mLockedBuffer->unlock();
854    ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
855
856    err = queueBuffer(mLockedBuffer.get(), -1);
857    ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
858            mLockedBuffer->handle, strerror(-err));
859
860    mPostedBuffer = mLockedBuffer;
861    mLockedBuffer = 0;
862    return err;
863}
864
865}; // namespace android
866