Surface.cpp revision ba93b3f8e403636b614a4a379f9421bc70dca84f 
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, int* fenceFd) {
179    ATRACE_CALL();
180    ALOGV("Surface::dequeueBuffer");
181    Mutex::Autolock lock(mMutex);
182    int buf = -1;
183    int reqW = mReqWidth ? mReqWidth : mUserWidth;
184    int reqH = mReqHeight ? mReqHeight : mUserHeight;
185    sp<Fence> fence;
186    status_t result = mGraphicBufferProducer->dequeueBuffer(&buf, &fence, mSwapIntervalZero,
187            reqW, reqH, mReqFormat, mReqUsage);
188    if (result < 0) {
189        ALOGV("dequeueBuffer: IGraphicBufferProducer::dequeueBuffer(%d, %d, %d, %d)"
190             "failed: %d", mReqWidth, mReqHeight, mReqFormat, mReqUsage,
191             result);
192        return result;
193    }
194    sp<GraphicBuffer>& gbuf(mSlots[buf].buffer);
195
196    // this should never happen
197    ALOGE_IF(fence == NULL, "Surface::dequeueBuffer: received null Fence! buf=%d", buf);
198
199    if (result & IGraphicBufferProducer::RELEASE_ALL_BUFFERS) {
200        freeAllBuffers();
201    }
202
203    if ((result & IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION) || gbuf == 0) {
204        result = mGraphicBufferProducer->requestBuffer(buf, &gbuf);
205        if (result != NO_ERROR) {
206            ALOGE("dequeueBuffer: IGraphicBufferProducer::requestBuffer failed: %d", result);
207            return result;
208        }
209    }
210
211    if (fence->isValid()) {
212        *fenceFd = fence->dup();
213        if (*fenceFd == -1) {
214            ALOGE("dequeueBuffer: error duping fence: %d", errno);
215            // dup() should never fail; something is badly wrong. Soldier on
216            // and hope for the best; the worst that should happen is some
217            // visible corruption that lasts until the next frame.
218        }
219    } else {
220        *fenceFd = -1;
221    }
222
223    *buffer = gbuf.get();
224    return OK;
225}
226
227int Surface::cancelBuffer(android_native_buffer_t* buffer,
228        int fenceFd) {
229    ATRACE_CALL();
230    ALOGV("Surface::cancelBuffer");
231    Mutex::Autolock lock(mMutex);
232    int i = getSlotFromBufferLocked(buffer);
233    if (i < 0) {
234        return i;
235    }
236    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
237    mGraphicBufferProducer->cancelBuffer(i, fence);
238    return OK;
239}
240
241int Surface::getSlotFromBufferLocked(
242        android_native_buffer_t* buffer) const {
243    bool dumpedState = false;
244    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
245        if (mSlots[i].buffer != NULL &&
246                mSlots[i].buffer->handle == buffer->handle) {
247            return i;
248        }
249    }
250    ALOGE("getSlotFromBufferLocked: unknown buffer: %p", buffer->handle);
251    return BAD_VALUE;
252}
253
254int Surface::lockBuffer_DEPRECATED(android_native_buffer_t* buffer) {
255    ALOGV("Surface::lockBuffer");
256    Mutex::Autolock lock(mMutex);
257    return OK;
258}
259
260int Surface::queueBuffer(android_native_buffer_t* buffer, int fenceFd) {
261    ATRACE_CALL();
262    ALOGV("Surface::queueBuffer");
263    Mutex::Autolock lock(mMutex);
264    int64_t timestamp;
265    if (mTimestamp == NATIVE_WINDOW_TIMESTAMP_AUTO) {
266        timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
267        ALOGV("Surface::queueBuffer making up timestamp: %.2f ms",
268             timestamp / 1000000.f);
269    } else {
270        timestamp = mTimestamp;
271    }
272    int i = getSlotFromBufferLocked(buffer);
273    if (i < 0) {
274        return i;
275    }
276
277
278    // Make sure the crop rectangle is entirely inside the buffer.
279    Rect crop;
280    mCrop.intersect(Rect(buffer->width, buffer->height), &crop);
281
282    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
283    IGraphicBufferProducer::QueueBufferOutput output;
284    IGraphicBufferProducer::QueueBufferInput input(timestamp, crop, mScalingMode,
285            mTransform, mSwapIntervalZero, fence);
286    status_t err = mGraphicBufferProducer->queueBuffer(i, input, &output);
287    if (err != OK)  {
288        ALOGE("queueBuffer: error queuing buffer to SurfaceTexture, %d", err);
289    }
290    uint32_t numPendingBuffers = 0;
291    output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
292            &numPendingBuffers);
293
294    mConsumerRunningBehind = (numPendingBuffers >= 2);
295
296    return err;
297}
298
299int Surface::query(int what, int* value) const {
300    ATRACE_CALL();
301    ALOGV("Surface::query");
302    { // scope for the lock
303        Mutex::Autolock lock(mMutex);
304        switch (what) {
305            case NATIVE_WINDOW_FORMAT:
306                if (mReqFormat) {
307                    *value = mReqFormat;
308                    return NO_ERROR;
309                }
310                break;
311            case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER: {
312                sp<ISurfaceComposer> composer(
313                        ComposerService::getComposerService());
314                if (composer->authenticateSurfaceTexture(mGraphicBufferProducer)) {
315                    *value = 1;
316                } else {
317                    *value = 0;
318                }
319                return NO_ERROR;
320            }
321            case NATIVE_WINDOW_CONCRETE_TYPE:
322                *value = NATIVE_WINDOW_SURFACE;
323                return NO_ERROR;
324            case NATIVE_WINDOW_DEFAULT_WIDTH:
325                *value = mUserWidth ? mUserWidth : mDefaultWidth;
326                return NO_ERROR;
327            case NATIVE_WINDOW_DEFAULT_HEIGHT:
328                *value = mUserHeight ? mUserHeight : mDefaultHeight;
329                return NO_ERROR;
330            case NATIVE_WINDOW_TRANSFORM_HINT:
331                *value = mTransformHint;
332                return NO_ERROR;
333            case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND: {
334                status_t err = NO_ERROR;
335                if (!mConsumerRunningBehind) {
336                    *value = 0;
337                } else {
338                    err = mGraphicBufferProducer->query(what, value);
339                    if (err == NO_ERROR) {
340                        mConsumerRunningBehind = *value;
341                    }
342                }
343                return err;
344            }
345        }
346    }
347    return mGraphicBufferProducer->query(what, value);
348}
349
350int Surface::perform(int operation, va_list args)
351{
352    int res = NO_ERROR;
353    switch (operation) {
354    case NATIVE_WINDOW_CONNECT:
355        // deprecated. must return NO_ERROR.
356        break;
357    case NATIVE_WINDOW_DISCONNECT:
358        // deprecated. must return NO_ERROR.
359        break;
360    case NATIVE_WINDOW_SET_USAGE:
361        res = dispatchSetUsage(args);
362        break;
363    case NATIVE_WINDOW_SET_CROP:
364        res = dispatchSetCrop(args);
365        break;
366    case NATIVE_WINDOW_SET_BUFFER_COUNT:
367        res = dispatchSetBufferCount(args);
368        break;
369    case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
370        res = dispatchSetBuffersGeometry(args);
371        break;
372    case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
373        res = dispatchSetBuffersTransform(args);
374        break;
375    case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
376        res = dispatchSetBuffersTimestamp(args);
377        break;
378    case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
379        res = dispatchSetBuffersDimensions(args);
380        break;
381    case NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS:
382        res = dispatchSetBuffersUserDimensions(args);
383        break;
384    case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
385        res = dispatchSetBuffersFormat(args);
386        break;
387    case NATIVE_WINDOW_LOCK:
388        res = dispatchLock(args);
389        break;
390    case NATIVE_WINDOW_UNLOCK_AND_POST:
391        res = dispatchUnlockAndPost(args);
392        break;
393    case NATIVE_WINDOW_SET_SCALING_MODE:
394        res = dispatchSetScalingMode(args);
395        break;
396    case NATIVE_WINDOW_API_CONNECT:
397        res = dispatchConnect(args);
398        break;
399    case NATIVE_WINDOW_API_DISCONNECT:
400        res = dispatchDisconnect(args);
401        break;
402    default:
403        res = NAME_NOT_FOUND;
404        break;
405    }
406    return res;
407}
408
409int Surface::dispatchConnect(va_list args) {
410    int api = va_arg(args, int);
411    return connect(api);
412}
413
414int Surface::dispatchDisconnect(va_list args) {
415    int api = va_arg(args, int);
416    return disconnect(api);
417}
418
419int Surface::dispatchSetUsage(va_list args) {
420    int usage = va_arg(args, int);
421    return setUsage(usage);
422}
423
424int Surface::dispatchSetCrop(va_list args) {
425    android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
426    return setCrop(reinterpret_cast<Rect const*>(rect));
427}
428
429int Surface::dispatchSetBufferCount(va_list args) {
430    size_t bufferCount = va_arg(args, size_t);
431    return setBufferCount(bufferCount);
432}
433
434int Surface::dispatchSetBuffersGeometry(va_list args) {
435    int w = va_arg(args, int);
436    int h = va_arg(args, int);
437    int f = va_arg(args, int);
438    int err = setBuffersDimensions(w, h);
439    if (err != 0) {
440        return err;
441    }
442    return setBuffersFormat(f);
443}
444
445int Surface::dispatchSetBuffersDimensions(va_list args) {
446    int w = va_arg(args, int);
447    int h = va_arg(args, int);
448    return setBuffersDimensions(w, h);
449}
450
451int Surface::dispatchSetBuffersUserDimensions(va_list args) {
452    int w = va_arg(args, int);
453    int h = va_arg(args, int);
454    return setBuffersUserDimensions(w, h);
455}
456
457int Surface::dispatchSetBuffersFormat(va_list args) {
458    int f = va_arg(args, int);
459    return setBuffersFormat(f);
460}
461
462int Surface::dispatchSetScalingMode(va_list args) {
463    int m = va_arg(args, int);
464    return setScalingMode(m);
465}
466
467int Surface::dispatchSetBuffersTransform(va_list args) {
468    int transform = va_arg(args, int);
469    return setBuffersTransform(transform);
470}
471
472int Surface::dispatchSetBuffersTimestamp(va_list args) {
473    int64_t timestamp = va_arg(args, int64_t);
474    return setBuffersTimestamp(timestamp);
475}
476
477int Surface::dispatchLock(va_list args) {
478    ANativeWindow_Buffer* outBuffer = va_arg(args, ANativeWindow_Buffer*);
479    ARect* inOutDirtyBounds = va_arg(args, ARect*);
480    return lock(outBuffer, inOutDirtyBounds);
481}
482
483int Surface::dispatchUnlockAndPost(va_list args) {
484    return unlockAndPost();
485}
486
487
488int Surface::connect(int api) {
489    ATRACE_CALL();
490    ALOGV("Surface::connect");
491    Mutex::Autolock lock(mMutex);
492    IGraphicBufferProducer::QueueBufferOutput output;
493    int err = mGraphicBufferProducer->connect(api, mProducerControlledByApp, &output);
494    if (err == NO_ERROR) {
495        uint32_t numPendingBuffers = 0;
496        output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
497                &numPendingBuffers);
498        mConsumerRunningBehind = (numPendingBuffers >= 2);
499    }
500    if (!err && api == NATIVE_WINDOW_API_CPU) {
501        mConnectedToCpu = true;
502    }
503    return err;
504}
505
506int Surface::disconnect(int api) {
507    ATRACE_CALL();
508    ALOGV("Surface::disconnect");
509    Mutex::Autolock lock(mMutex);
510    freeAllBuffers();
511    int err = mGraphicBufferProducer->disconnect(api);
512    if (!err) {
513        mReqFormat = 0;
514        mReqWidth = 0;
515        mReqHeight = 0;
516        mReqUsage = 0;
517        mCrop.clear();
518        mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
519        mTransform = 0;
520        if (api == NATIVE_WINDOW_API_CPU) {
521            mConnectedToCpu = false;
522        }
523    }
524    return err;
525}
526
527int Surface::setUsage(uint32_t reqUsage)
528{
529    ALOGV("Surface::setUsage");
530    Mutex::Autolock lock(mMutex);
531    mReqUsage = reqUsage;
532    return OK;
533}
534
535int Surface::setCrop(Rect const* rect)
536{
537    ATRACE_CALL();
538
539    Rect realRect;
540    if (rect == NULL || rect->isEmpty()) {
541        realRect.clear();
542    } else {
543        realRect = *rect;
544    }
545
546    ALOGV("Surface::setCrop rect=[%d %d %d %d]",
547            realRect.left, realRect.top, realRect.right, realRect.bottom);
548
549    Mutex::Autolock lock(mMutex);
550    mCrop = realRect;
551    return NO_ERROR;
552}
553
554int Surface::setBufferCount(int bufferCount)
555{
556    ATRACE_CALL();
557    ALOGV("Surface::setBufferCount");
558    Mutex::Autolock lock(mMutex);
559
560    status_t err = mGraphicBufferProducer->setBufferCount(bufferCount);
561    ALOGE_IF(err, "IGraphicBufferProducer::setBufferCount(%d) returned %s",
562            bufferCount, strerror(-err));
563
564    if (err == NO_ERROR) {
565        freeAllBuffers();
566    }
567
568    return err;
569}
570
571int Surface::setBuffersDimensions(int w, int h)
572{
573    ATRACE_CALL();
574    ALOGV("Surface::setBuffersDimensions");
575
576    if (w<0 || h<0)
577        return BAD_VALUE;
578
579    if ((w && !h) || (!w && h))
580        return BAD_VALUE;
581
582    Mutex::Autolock lock(mMutex);
583    mReqWidth = w;
584    mReqHeight = h;
585    return NO_ERROR;
586}
587
588int Surface::setBuffersUserDimensions(int w, int h)
589{
590    ATRACE_CALL();
591    ALOGV("Surface::setBuffersUserDimensions");
592
593    if (w<0 || h<0)
594        return BAD_VALUE;
595
596    if ((w && !h) || (!w && h))
597        return BAD_VALUE;
598
599    Mutex::Autolock lock(mMutex);
600    mUserWidth = w;
601    mUserHeight = h;
602    return NO_ERROR;
603}
604
605int Surface::setBuffersFormat(int format)
606{
607    ALOGV("Surface::setBuffersFormat");
608
609    if (format<0)
610        return BAD_VALUE;
611
612    Mutex::Autolock lock(mMutex);
613    mReqFormat = format;
614    return NO_ERROR;
615}
616
617int Surface::setScalingMode(int mode)
618{
619    ATRACE_CALL();
620    ALOGV("Surface::setScalingMode(%d)", mode);
621
622    switch (mode) {
623        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
624        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
625        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
626            break;
627        default:
628            ALOGE("unknown scaling mode: %d", mode);
629            return BAD_VALUE;
630    }
631
632    Mutex::Autolock lock(mMutex);
633    mScalingMode = mode;
634    return NO_ERROR;
635}
636
637int Surface::setBuffersTransform(int transform)
638{
639    ATRACE_CALL();
640    ALOGV("Surface::setBuffersTransform");
641    Mutex::Autolock lock(mMutex);
642    mTransform = transform;
643    return NO_ERROR;
644}
645
646int Surface::setBuffersTimestamp(int64_t timestamp)
647{
648    ALOGV("Surface::setBuffersTimestamp");
649    Mutex::Autolock lock(mMutex);
650    mTimestamp = timestamp;
651    return NO_ERROR;
652}
653
654void Surface::freeAllBuffers() {
655    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
656        mSlots[i].buffer = 0;
657    }
658}
659
660// ----------------------------------------------------------------------
661// the lock/unlock APIs must be used from the same thread
662
663static status_t copyBlt(
664        const sp<GraphicBuffer>& dst,
665        const sp<GraphicBuffer>& src,
666        const Region& reg)
667{
668    // src and dst with, height and format must be identical. no verification
669    // is done here.
670    status_t err;
671    uint8_t const * src_bits = NULL;
672    err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(), (void**)&src_bits);
673    ALOGE_IF(err, "error locking src buffer %s", strerror(-err));
674
675    uint8_t* dst_bits = NULL;
676    err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(), (void**)&dst_bits);
677    ALOGE_IF(err, "error locking dst buffer %s", strerror(-err));
678
679    Region::const_iterator head(reg.begin());
680    Region::const_iterator tail(reg.end());
681    if (head != tail && src_bits && dst_bits) {
682        const size_t bpp = bytesPerPixel(src->format);
683        const size_t dbpr = dst->stride * bpp;
684        const size_t sbpr = src->stride * bpp;
685
686        while (head != tail) {
687            const Rect& r(*head++);
688            ssize_t h = r.height();
689            if (h <= 0) continue;
690            size_t size = r.width() * bpp;
691            uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
692            uint8_t       * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
693            if (dbpr==sbpr && size==sbpr) {
694                size *= h;
695                h = 1;
696            }
697            do {
698                memcpy(d, s, size);
699                d += dbpr;
700                s += sbpr;
701            } while (--h > 0);
702        }
703    }
704
705    if (src_bits)
706        src->unlock();
707
708    if (dst_bits)
709        dst->unlock();
710
711    return err;
712}
713
714// ----------------------------------------------------------------------------
715
716status_t Surface::lock(
717        ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds)
718{
719    if (mLockedBuffer != 0) {
720        ALOGE("Surface::lock failed, already locked");
721        return INVALID_OPERATION;
722    }
723
724    if (!mConnectedToCpu) {
725        int err = Surface::connect(NATIVE_WINDOW_API_CPU);
726        if (err) {
727            return err;
728        }
729        // we're intending to do software rendering from this point
730        setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
731    }
732
733    ANativeWindowBuffer* out;
734    int fenceFd = -1;
735    status_t err = dequeueBuffer(&out, &fenceFd);
736    ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
737    if (err == NO_ERROR) {
738        sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
739        sp<Fence> fence(new Fence(fenceFd));
740
741        err = fence->waitForever("Surface::lock");
742        if (err != OK) {
743            ALOGE("Fence::wait failed (%s)", strerror(-err));
744            cancelBuffer(out, fenceFd);
745            return err;
746        }
747
748        const Rect bounds(backBuffer->width, backBuffer->height);
749
750        Region newDirtyRegion;
751        if (inOutDirtyBounds) {
752            newDirtyRegion.set(static_cast<Rect const&>(*inOutDirtyBounds));
753            newDirtyRegion.andSelf(bounds);
754        } else {
755            newDirtyRegion.set(bounds);
756        }
757
758        // figure out if we can copy the frontbuffer back
759        const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
760        const bool canCopyBack = (frontBuffer != 0 &&
761                backBuffer->width  == frontBuffer->width &&
762                backBuffer->height == frontBuffer->height &&
763                backBuffer->format == frontBuffer->format);
764
765        if (canCopyBack) {
766            // copy the area that is invalid and not repainted this round
767            const Region copyback(mDirtyRegion.subtract(newDirtyRegion));
768            if (!copyback.isEmpty())
769                copyBlt(backBuffer, frontBuffer, copyback);
770        } else {
771            // if we can't copy-back anything, modify the user's dirty
772            // region to make sure they redraw the whole buffer
773            newDirtyRegion.set(bounds);
774            mDirtyRegion.clear();
775            Mutex::Autolock lock(mMutex);
776            for (size_t i=0 ; i<NUM_BUFFER_SLOTS ; i++) {
777                mSlots[i].dirtyRegion.clear();
778            }
779        }
780
781
782        { // scope for the lock
783            Mutex::Autolock lock(mMutex);
784            int backBufferSlot(getSlotFromBufferLocked(backBuffer.get()));
785            if (backBufferSlot >= 0) {
786                Region& dirtyRegion(mSlots[backBufferSlot].dirtyRegion);
787                mDirtyRegion.subtract(dirtyRegion);
788                dirtyRegion = newDirtyRegion;
789            }
790        }
791
792        mDirtyRegion.orSelf(newDirtyRegion);
793        if (inOutDirtyBounds) {
794            *inOutDirtyBounds = newDirtyRegion.getBounds();
795        }
796
797        void* vaddr;
798        status_t res = backBuffer->lock(
799                GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
800                newDirtyRegion.bounds(), &vaddr);
801
802        ALOGW_IF(res, "failed locking buffer (handle = %p)",
803                backBuffer->handle);
804
805        if (res != 0) {
806            err = INVALID_OPERATION;
807        } else {
808            mLockedBuffer = backBuffer;
809            outBuffer->width  = backBuffer->width;
810            outBuffer->height = backBuffer->height;
811            outBuffer->stride = backBuffer->stride;
812            outBuffer->format = backBuffer->format;
813            outBuffer->bits   = vaddr;
814        }
815    }
816    return err;
817}
818
819status_t Surface::unlockAndPost()
820{
821    if (mLockedBuffer == 0) {
822        ALOGE("Surface::unlockAndPost failed, no locked buffer");
823        return INVALID_OPERATION;
824    }
825
826    status_t err = mLockedBuffer->unlock();
827    ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
828
829    err = queueBuffer(mLockedBuffer.get(), -1);
830    ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
831            mLockedBuffer->handle, strerror(-err));
832
833    mPostedBuffer = mLockedBuffer;
834    mLockedBuffer = 0;
835    return err;
836}
837
838}; // namespace android
839