Surface.cpp revision 02528cf6aaedbbfec55be57d33389e1c57d88245 
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/IProducerListener.h>
31#include <gui/ISurfaceComposer.h>
32#include <gui/SurfaceComposerClient.h>
33#include <gui/GLConsumer.h>
34#include <gui/Surface.h>
35
36#include <private/gui/ComposerService.h>
37
38namespace android {
39
40Surface::Surface(
41        const sp<IGraphicBufferProducer>& bufferProducer,
42        bool controlledByApp)
43    : mGraphicBufferProducer(bufferProducer)
44{
45    // Initialize the ANativeWindow function pointers.
46    ANativeWindow::setSwapInterval  = hook_setSwapInterval;
47    ANativeWindow::dequeueBuffer    = hook_dequeueBuffer;
48    ANativeWindow::cancelBuffer     = hook_cancelBuffer;
49    ANativeWindow::queueBuffer      = hook_queueBuffer;
50    ANativeWindow::query            = hook_query;
51    ANativeWindow::perform          = hook_perform;
52
53    ANativeWindow::dequeueBuffer_DEPRECATED = hook_dequeueBuffer_DEPRECATED;
54    ANativeWindow::cancelBuffer_DEPRECATED  = hook_cancelBuffer_DEPRECATED;
55    ANativeWindow::lockBuffer_DEPRECATED    = hook_lockBuffer_DEPRECATED;
56    ANativeWindow::queueBuffer_DEPRECATED   = hook_queueBuffer_DEPRECATED;
57
58    const_cast<int&>(ANativeWindow::minSwapInterval) = 0;
59    const_cast<int&>(ANativeWindow::maxSwapInterval) = 1;
60
61    mReqWidth = 0;
62    mReqHeight = 0;
63    mReqFormat = 0;
64    mReqUsage = 0;
65    mTimestamp = NATIVE_WINDOW_TIMESTAMP_AUTO;
66    mCrop.clear();
67    mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
68    mTransform = 0;
69    mDefaultWidth = 0;
70    mDefaultHeight = 0;
71    mUserWidth = 0;
72    mUserHeight = 0;
73    mTransformHint = 0;
74    mConsumerRunningBehind = false;
75    mConnectedToCpu = false;
76    mProducerControlledByApp = controlledByApp;
77    mSwapIntervalZero = false;
78}
79
80Surface::~Surface() {
81    if (mConnectedToCpu) {
82        Surface::disconnect(NATIVE_WINDOW_API_CPU);
83    }
84}
85
86sp<IGraphicBufferProducer> Surface::getIGraphicBufferProducer() const {
87    return mGraphicBufferProducer;
88}
89
90void Surface::setSidebandStream(const sp<NativeHandle>& stream) {
91    mGraphicBufferProducer->setSidebandStream(stream);
92}
93
94int Surface::hook_setSwapInterval(ANativeWindow* window, int interval) {
95    Surface* c = getSelf(window);
96    return c->setSwapInterval(interval);
97}
98
99int Surface::hook_dequeueBuffer(ANativeWindow* window,
100        ANativeWindowBuffer** buffer, int* fenceFd) {
101    Surface* c = getSelf(window);
102    return c->dequeueBuffer(buffer, fenceFd);
103}
104
105int Surface::hook_cancelBuffer(ANativeWindow* window,
106        ANativeWindowBuffer* buffer, int fenceFd) {
107    Surface* c = getSelf(window);
108    return c->cancelBuffer(buffer, fenceFd);
109}
110
111int Surface::hook_queueBuffer(ANativeWindow* window,
112        ANativeWindowBuffer* buffer, int fenceFd) {
113    Surface* c = getSelf(window);
114    return c->queueBuffer(buffer, fenceFd);
115}
116
117int Surface::hook_dequeueBuffer_DEPRECATED(ANativeWindow* window,
118        ANativeWindowBuffer** buffer) {
119    Surface* c = getSelf(window);
120    ANativeWindowBuffer* buf;
121    int fenceFd = -1;
122    int result = c->dequeueBuffer(&buf, &fenceFd);
123    sp<Fence> fence(new Fence(fenceFd));
124    int waitResult = fence->waitForever("dequeueBuffer_DEPRECATED");
125    if (waitResult != OK) {
126        ALOGE("dequeueBuffer_DEPRECATED: Fence::wait returned an error: %d",
127                waitResult);
128        c->cancelBuffer(buf, -1);
129        return waitResult;
130    }
131    *buffer = buf;
132    return result;
133}
134
135int Surface::hook_cancelBuffer_DEPRECATED(ANativeWindow* window,
136        ANativeWindowBuffer* buffer) {
137    Surface* c = getSelf(window);
138    return c->cancelBuffer(buffer, -1);
139}
140
141int Surface::hook_lockBuffer_DEPRECATED(ANativeWindow* window,
142        ANativeWindowBuffer* buffer) {
143    Surface* c = getSelf(window);
144    return c->lockBuffer_DEPRECATED(buffer);
145}
146
147int Surface::hook_queueBuffer_DEPRECATED(ANativeWindow* window,
148        ANativeWindowBuffer* buffer) {
149    Surface* c = getSelf(window);
150    return c->queueBuffer(buffer, -1);
151}
152
153int Surface::hook_query(const ANativeWindow* window,
154                                int what, int* value) {
155    const Surface* c = getSelf(window);
156    return c->query(what, value);
157}
158
159int Surface::hook_perform(ANativeWindow* window, int operation, ...) {
160    va_list args;
161    va_start(args, operation);
162    Surface* c = getSelf(window);
163    return c->perform(operation, args);
164}
165
166int Surface::setSwapInterval(int interval) {
167    ATRACE_CALL();
168    // EGL specification states:
169    //  interval is silently clamped to minimum and maximum implementation
170    //  dependent values before being stored.
171
172    if (interval < minSwapInterval)
173        interval = minSwapInterval;
174
175    if (interval > maxSwapInterval)
176        interval = maxSwapInterval;
177
178    mSwapIntervalZero = (interval == 0);
179
180    return NO_ERROR;
181}
182
183int Surface::dequeueBuffer(android_native_buffer_t** buffer, int* fenceFd) {
184    ATRACE_CALL();
185    ALOGV("Surface::dequeueBuffer");
186
187    int reqW;
188    int reqH;
189    bool swapIntervalZero;
190    uint32_t reqFormat;
191    uint32_t reqUsage;
192
193    {
194        Mutex::Autolock lock(mMutex);
195
196        reqW = mReqWidth ? mReqWidth : mUserWidth;
197        reqH = mReqHeight ? mReqHeight : mUserHeight;
198
199        swapIntervalZero = mSwapIntervalZero;
200        reqFormat = mReqFormat;
201        reqUsage = mReqUsage;
202    } // Drop the lock so that we can still touch the Surface while blocking in IGBP::dequeueBuffer
203
204    int buf = -1;
205    sp<Fence> fence;
206    status_t result = mGraphicBufferProducer->dequeueBuffer(&buf, &fence, swapIntervalZero,
207            reqW, reqH, reqFormat, reqUsage);
208
209    if (result < 0) {
210        ALOGV("dequeueBuffer: IGraphicBufferProducer::dequeueBuffer(%d, %d, %d, %d, %d)"
211             "failed: %d", swapIntervalZero, reqW, reqH, reqFormat, reqUsage,
212             result);
213        return result;
214    }
215
216    Mutex::Autolock lock(mMutex);
217
218    sp<GraphicBuffer>& gbuf(mSlots[buf].buffer);
219
220    // this should never happen
221    ALOGE_IF(fence == NULL, "Surface::dequeueBuffer: received null Fence! buf=%d", buf);
222
223    if (result & IGraphicBufferProducer::RELEASE_ALL_BUFFERS) {
224        freeAllBuffers();
225    }
226
227    if ((result & IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION) || gbuf == 0) {
228        result = mGraphicBufferProducer->requestBuffer(buf, &gbuf);
229        if (result != NO_ERROR) {
230            ALOGE("dequeueBuffer: IGraphicBufferProducer::requestBuffer failed: %d", result);
231            return result;
232        }
233    }
234
235    if (fence->isValid()) {
236        *fenceFd = fence->dup();
237        if (*fenceFd == -1) {
238            ALOGE("dequeueBuffer: error duping fence: %d", errno);
239            // dup() should never fail; something is badly wrong. Soldier on
240            // and hope for the best; the worst that should happen is some
241            // visible corruption that lasts until the next frame.
242        }
243    } else {
244        *fenceFd = -1;
245    }
246
247    *buffer = gbuf.get();
248    return OK;
249}
250
251int Surface::cancelBuffer(android_native_buffer_t* buffer,
252        int fenceFd) {
253    ATRACE_CALL();
254    ALOGV("Surface::cancelBuffer");
255    Mutex::Autolock lock(mMutex);
256    int i = getSlotFromBufferLocked(buffer);
257    if (i < 0) {
258        return i;
259    }
260    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
261    mGraphicBufferProducer->cancelBuffer(i, fence);
262    return OK;
263}
264
265int Surface::getSlotFromBufferLocked(
266        android_native_buffer_t* buffer) const {
267    bool dumpedState = false;
268    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
269        if (mSlots[i].buffer != NULL &&
270                mSlots[i].buffer->handle == buffer->handle) {
271            return i;
272        }
273    }
274    ALOGE("getSlotFromBufferLocked: unknown buffer: %p", buffer->handle);
275    return BAD_VALUE;
276}
277
278int Surface::lockBuffer_DEPRECATED(android_native_buffer_t* buffer __attribute__((unused))) {
279    ALOGV("Surface::lockBuffer");
280    Mutex::Autolock lock(mMutex);
281    return OK;
282}
283
284int Surface::queueBuffer(android_native_buffer_t* buffer, int fenceFd) {
285    ATRACE_CALL();
286    ALOGV("Surface::queueBuffer");
287    Mutex::Autolock lock(mMutex);
288    int64_t timestamp;
289    bool isAutoTimestamp = false;
290    if (mTimestamp == NATIVE_WINDOW_TIMESTAMP_AUTO) {
291        timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
292        isAutoTimestamp = true;
293        ALOGV("Surface::queueBuffer making up timestamp: %.2f ms",
294            timestamp / 1000000.f);
295    } else {
296        timestamp = mTimestamp;
297    }
298    int i = getSlotFromBufferLocked(buffer);
299    if (i < 0) {
300        return i;
301    }
302
303
304    // Make sure the crop rectangle is entirely inside the buffer.
305    Rect crop;
306    mCrop.intersect(Rect(buffer->width, buffer->height), &crop);
307
308    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
309    IGraphicBufferProducer::QueueBufferOutput output;
310    IGraphicBufferProducer::QueueBufferInput input(timestamp, isAutoTimestamp,
311            crop, mScalingMode, mTransform, mSwapIntervalZero, fence);
312    status_t err = mGraphicBufferProducer->queueBuffer(i, input, &output);
313    if (err != OK)  {
314        ALOGE("queueBuffer: error queuing buffer to SurfaceTexture, %d", err);
315    }
316    uint32_t numPendingBuffers = 0;
317    output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
318            &numPendingBuffers);
319
320    mConsumerRunningBehind = (numPendingBuffers >= 2);
321
322    return err;
323}
324
325int Surface::query(int what, int* value) const {
326    ATRACE_CALL();
327    ALOGV("Surface::query");
328    { // scope for the lock
329        Mutex::Autolock lock(mMutex);
330        switch (what) {
331            case NATIVE_WINDOW_FORMAT:
332                if (mReqFormat) {
333                    *value = mReqFormat;
334                    return NO_ERROR;
335                }
336                break;
337            case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER: {
338                sp<ISurfaceComposer> composer(
339                        ComposerService::getComposerService());
340                if (composer->authenticateSurfaceTexture(mGraphicBufferProducer)) {
341                    *value = 1;
342                } else {
343                    *value = 0;
344                }
345                return NO_ERROR;
346            }
347            case NATIVE_WINDOW_CONCRETE_TYPE:
348                *value = NATIVE_WINDOW_SURFACE;
349                return NO_ERROR;
350            case NATIVE_WINDOW_DEFAULT_WIDTH:
351                *value = mUserWidth ? mUserWidth : mDefaultWidth;
352                return NO_ERROR;
353            case NATIVE_WINDOW_DEFAULT_HEIGHT:
354                *value = mUserHeight ? mUserHeight : mDefaultHeight;
355                return NO_ERROR;
356            case NATIVE_WINDOW_TRANSFORM_HINT:
357                *value = mTransformHint;
358                return NO_ERROR;
359            case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND: {
360                status_t err = NO_ERROR;
361                if (!mConsumerRunningBehind) {
362                    *value = 0;
363                } else {
364                    err = mGraphicBufferProducer->query(what, value);
365                    if (err == NO_ERROR) {
366                        mConsumerRunningBehind = *value;
367                    }
368                }
369                return err;
370            }
371        }
372    }
373    return mGraphicBufferProducer->query(what, value);
374}
375
376int Surface::perform(int operation, va_list args)
377{
378    int res = NO_ERROR;
379    switch (operation) {
380    case NATIVE_WINDOW_CONNECT:
381        // deprecated. must return NO_ERROR.
382        break;
383    case NATIVE_WINDOW_DISCONNECT:
384        // deprecated. must return NO_ERROR.
385        break;
386    case NATIVE_WINDOW_SET_USAGE:
387        res = dispatchSetUsage(args);
388        break;
389    case NATIVE_WINDOW_SET_CROP:
390        res = dispatchSetCrop(args);
391        break;
392    case NATIVE_WINDOW_SET_BUFFER_COUNT:
393        res = dispatchSetBufferCount(args);
394        break;
395    case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
396        res = dispatchSetBuffersGeometry(args);
397        break;
398    case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
399        res = dispatchSetBuffersTransform(args);
400        break;
401    case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
402        res = dispatchSetBuffersTimestamp(args);
403        break;
404    case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
405        res = dispatchSetBuffersDimensions(args);
406        break;
407    case NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS:
408        res = dispatchSetBuffersUserDimensions(args);
409        break;
410    case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
411        res = dispatchSetBuffersFormat(args);
412        break;
413    case NATIVE_WINDOW_LOCK:
414        res = dispatchLock(args);
415        break;
416    case NATIVE_WINDOW_UNLOCK_AND_POST:
417        res = dispatchUnlockAndPost(args);
418        break;
419    case NATIVE_WINDOW_SET_SCALING_MODE:
420        res = dispatchSetScalingMode(args);
421        break;
422    case NATIVE_WINDOW_API_CONNECT:
423        res = dispatchConnect(args);
424        break;
425    case NATIVE_WINDOW_API_DISCONNECT:
426        res = dispatchDisconnect(args);
427        break;
428    default:
429        res = NAME_NOT_FOUND;
430        break;
431    }
432    return res;
433}
434
435int Surface::dispatchConnect(va_list args) {
436    int api = va_arg(args, int);
437    return connect(api);
438}
439
440int Surface::dispatchDisconnect(va_list args) {
441    int api = va_arg(args, int);
442    return disconnect(api);
443}
444
445int Surface::dispatchSetUsage(va_list args) {
446    int usage = va_arg(args, int);
447    return setUsage(usage);
448}
449
450int Surface::dispatchSetCrop(va_list args) {
451    android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
452    return setCrop(reinterpret_cast<Rect const*>(rect));
453}
454
455int Surface::dispatchSetBufferCount(va_list args) {
456    size_t bufferCount = va_arg(args, size_t);
457    return setBufferCount(bufferCount);
458}
459
460int Surface::dispatchSetBuffersGeometry(va_list args) {
461    int w = va_arg(args, int);
462    int h = va_arg(args, int);
463    int f = va_arg(args, int);
464    int err = setBuffersDimensions(w, h);
465    if (err != 0) {
466        return err;
467    }
468    return setBuffersFormat(f);
469}
470
471int Surface::dispatchSetBuffersDimensions(va_list args) {
472    int w = va_arg(args, int);
473    int h = va_arg(args, int);
474    return setBuffersDimensions(w, h);
475}
476
477int Surface::dispatchSetBuffersUserDimensions(va_list args) {
478    int w = va_arg(args, int);
479    int h = va_arg(args, int);
480    return setBuffersUserDimensions(w, h);
481}
482
483int Surface::dispatchSetBuffersFormat(va_list args) {
484    int f = va_arg(args, int);
485    return setBuffersFormat(f);
486}
487
488int Surface::dispatchSetScalingMode(va_list args) {
489    int m = va_arg(args, int);
490    return setScalingMode(m);
491}
492
493int Surface::dispatchSetBuffersTransform(va_list args) {
494    int transform = va_arg(args, int);
495    return setBuffersTransform(transform);
496}
497
498int Surface::dispatchSetBuffersTimestamp(va_list args) {
499    int64_t timestamp = va_arg(args, int64_t);
500    return setBuffersTimestamp(timestamp);
501}
502
503int Surface::dispatchLock(va_list args) {
504    ANativeWindow_Buffer* outBuffer = va_arg(args, ANativeWindow_Buffer*);
505    ARect* inOutDirtyBounds = va_arg(args, ARect*);
506    return lock(outBuffer, inOutDirtyBounds);
507}
508
509int Surface::dispatchUnlockAndPost(va_list args __attribute__((unused))) {
510    return unlockAndPost();
511}
512
513
514int Surface::connect(int api) {
515    ATRACE_CALL();
516    ALOGV("Surface::connect");
517    static sp<IProducerListener> listener = new DummyProducerListener();
518    Mutex::Autolock lock(mMutex);
519    IGraphicBufferProducer::QueueBufferOutput output;
520    int err = mGraphicBufferProducer->connect(listener, api, mProducerControlledByApp, &output);
521    if (err == NO_ERROR) {
522        uint32_t numPendingBuffers = 0;
523        output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
524                &numPendingBuffers);
525        mConsumerRunningBehind = (numPendingBuffers >= 2);
526    }
527    if (!err && api == NATIVE_WINDOW_API_CPU) {
528        mConnectedToCpu = true;
529    }
530    return err;
531}
532
533
534int Surface::disconnect(int api) {
535    ATRACE_CALL();
536    ALOGV("Surface::disconnect");
537    Mutex::Autolock lock(mMutex);
538    freeAllBuffers();
539    int err = mGraphicBufferProducer->disconnect(api);
540    if (!err) {
541        mReqFormat = 0;
542        mReqWidth = 0;
543        mReqHeight = 0;
544        mReqUsage = 0;
545        mCrop.clear();
546        mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
547        mTransform = 0;
548        if (api == NATIVE_WINDOW_API_CPU) {
549            mConnectedToCpu = false;
550        }
551    }
552    return err;
553}
554
555int Surface::setUsage(uint32_t reqUsage)
556{
557    ALOGV("Surface::setUsage");
558    Mutex::Autolock lock(mMutex);
559    mReqUsage = reqUsage;
560    return OK;
561}
562
563int Surface::setCrop(Rect const* rect)
564{
565    ATRACE_CALL();
566
567    Rect realRect;
568    if (rect == NULL || rect->isEmpty()) {
569        realRect.clear();
570    } else {
571        realRect = *rect;
572    }
573
574    ALOGV("Surface::setCrop rect=[%d %d %d %d]",
575            realRect.left, realRect.top, realRect.right, realRect.bottom);
576
577    Mutex::Autolock lock(mMutex);
578    mCrop = realRect;
579    return NO_ERROR;
580}
581
582int Surface::setBufferCount(int bufferCount)
583{
584    ATRACE_CALL();
585    ALOGV("Surface::setBufferCount");
586    Mutex::Autolock lock(mMutex);
587
588    status_t err = mGraphicBufferProducer->setBufferCount(bufferCount);
589    ALOGE_IF(err, "IGraphicBufferProducer::setBufferCount(%d) returned %s",
590            bufferCount, strerror(-err));
591
592    if (err == NO_ERROR) {
593        freeAllBuffers();
594    }
595
596    return err;
597}
598
599int Surface::setBuffersDimensions(int w, int h)
600{
601    ATRACE_CALL();
602    ALOGV("Surface::setBuffersDimensions");
603
604    if (w<0 || h<0)
605        return BAD_VALUE;
606
607    if ((w && !h) || (!w && h))
608        return BAD_VALUE;
609
610    Mutex::Autolock lock(mMutex);
611    mReqWidth = w;
612    mReqHeight = h;
613    return NO_ERROR;
614}
615
616int Surface::setBuffersUserDimensions(int w, int h)
617{
618    ATRACE_CALL();
619    ALOGV("Surface::setBuffersUserDimensions");
620
621    if (w<0 || h<0)
622        return BAD_VALUE;
623
624    if ((w && !h) || (!w && h))
625        return BAD_VALUE;
626
627    Mutex::Autolock lock(mMutex);
628    mUserWidth = w;
629    mUserHeight = h;
630    return NO_ERROR;
631}
632
633int Surface::setBuffersFormat(int format)
634{
635    ALOGV("Surface::setBuffersFormat");
636
637    if (format<0)
638        return BAD_VALUE;
639
640    Mutex::Autolock lock(mMutex);
641    mReqFormat = format;
642    return NO_ERROR;
643}
644
645int Surface::setScalingMode(int mode)
646{
647    ATRACE_CALL();
648    ALOGV("Surface::setScalingMode(%d)", mode);
649
650    switch (mode) {
651        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
652        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
653        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
654            break;
655        default:
656            ALOGE("unknown scaling mode: %d", mode);
657            return BAD_VALUE;
658    }
659
660    Mutex::Autolock lock(mMutex);
661    mScalingMode = mode;
662    return NO_ERROR;
663}
664
665int Surface::setBuffersTransform(int transform)
666{
667    ATRACE_CALL();
668    ALOGV("Surface::setBuffersTransform");
669    Mutex::Autolock lock(mMutex);
670    mTransform = transform;
671    return NO_ERROR;
672}
673
674int Surface::setBuffersTimestamp(int64_t timestamp)
675{
676    ALOGV("Surface::setBuffersTimestamp");
677    Mutex::Autolock lock(mMutex);
678    mTimestamp = timestamp;
679    return NO_ERROR;
680}
681
682void Surface::freeAllBuffers() {
683    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
684        mSlots[i].buffer = 0;
685    }
686}
687
688// ----------------------------------------------------------------------
689// the lock/unlock APIs must be used from the same thread
690
691static status_t copyBlt(
692        const sp<GraphicBuffer>& dst,
693        const sp<GraphicBuffer>& src,
694        const Region& reg)
695{
696    // src and dst with, height and format must be identical. no verification
697    // is done here.
698    status_t err;
699    uint8_t const * src_bits = NULL;
700    err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(), (void**)&src_bits);
701    ALOGE_IF(err, "error locking src buffer %s", strerror(-err));
702
703    uint8_t* dst_bits = NULL;
704    err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(), (void**)&dst_bits);
705    ALOGE_IF(err, "error locking dst buffer %s", strerror(-err));
706
707    Region::const_iterator head(reg.begin());
708    Region::const_iterator tail(reg.end());
709    if (head != tail && src_bits && dst_bits) {
710        const size_t bpp = bytesPerPixel(src->format);
711        const size_t dbpr = dst->stride * bpp;
712        const size_t sbpr = src->stride * bpp;
713
714        while (head != tail) {
715            const Rect& r(*head++);
716            ssize_t h = r.height();
717            if (h <= 0) continue;
718            size_t size = r.width() * bpp;
719            uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
720            uint8_t       * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
721            if (dbpr==sbpr && size==sbpr) {
722                size *= h;
723                h = 1;
724            }
725            do {
726                memcpy(d, s, size);
727                d += dbpr;
728                s += sbpr;
729            } while (--h > 0);
730        }
731    }
732
733    if (src_bits)
734        src->unlock();
735
736    if (dst_bits)
737        dst->unlock();
738
739    return err;
740}
741
742// ----------------------------------------------------------------------------
743
744status_t Surface::lock(
745        ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds)
746{
747    if (mLockedBuffer != 0) {
748        ALOGE("Surface::lock failed, already locked");
749        return INVALID_OPERATION;
750    }
751
752    if (!mConnectedToCpu) {
753        int err = Surface::connect(NATIVE_WINDOW_API_CPU);
754        if (err) {
755            return err;
756        }
757        // we're intending to do software rendering from this point
758        setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
759    }
760
761    ANativeWindowBuffer* out;
762    int fenceFd = -1;
763    status_t err = dequeueBuffer(&out, &fenceFd);
764    ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
765    if (err == NO_ERROR) {
766        sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
767        const Rect bounds(backBuffer->width, backBuffer->height);
768
769        Region newDirtyRegion;
770        if (inOutDirtyBounds) {
771            newDirtyRegion.set(static_cast<Rect const&>(*inOutDirtyBounds));
772            newDirtyRegion.andSelf(bounds);
773        } else {
774            newDirtyRegion.set(bounds);
775        }
776
777        // figure out if we can copy the frontbuffer back
778        const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
779        const bool canCopyBack = (frontBuffer != 0 &&
780                backBuffer->width  == frontBuffer->width &&
781                backBuffer->height == frontBuffer->height &&
782                backBuffer->format == frontBuffer->format);
783
784        if (canCopyBack) {
785            // copy the area that is invalid and not repainted this round
786            const Region copyback(mDirtyRegion.subtract(newDirtyRegion));
787            if (!copyback.isEmpty())
788                copyBlt(backBuffer, frontBuffer, copyback);
789        } else {
790            // if we can't copy-back anything, modify the user's dirty
791            // region to make sure they redraw the whole buffer
792            newDirtyRegion.set(bounds);
793            mDirtyRegion.clear();
794            Mutex::Autolock lock(mMutex);
795            for (size_t i=0 ; i<NUM_BUFFER_SLOTS ; i++) {
796                mSlots[i].dirtyRegion.clear();
797            }
798        }
799
800
801        { // scope for the lock
802            Mutex::Autolock lock(mMutex);
803            int backBufferSlot(getSlotFromBufferLocked(backBuffer.get()));
804            if (backBufferSlot >= 0) {
805                Region& dirtyRegion(mSlots[backBufferSlot].dirtyRegion);
806                mDirtyRegion.subtract(dirtyRegion);
807                dirtyRegion = newDirtyRegion;
808            }
809        }
810
811        mDirtyRegion.orSelf(newDirtyRegion);
812        if (inOutDirtyBounds) {
813            *inOutDirtyBounds = newDirtyRegion.getBounds();
814        }
815
816        void* vaddr;
817        status_t res = backBuffer->lockAsync(
818                GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
819                newDirtyRegion.bounds(), &vaddr, fenceFd);
820
821        ALOGW_IF(res, "failed locking buffer (handle = %p)",
822                backBuffer->handle);
823
824        if (res != 0) {
825            err = INVALID_OPERATION;
826        } else {
827            mLockedBuffer = backBuffer;
828            outBuffer->width  = backBuffer->width;
829            outBuffer->height = backBuffer->height;
830            outBuffer->stride = backBuffer->stride;
831            outBuffer->format = backBuffer->format;
832            outBuffer->bits   = vaddr;
833        }
834    }
835    return err;
836}
837
838status_t Surface::unlockAndPost()
839{
840    if (mLockedBuffer == 0) {
841        ALOGE("Surface::unlockAndPost failed, no locked buffer");
842        return INVALID_OPERATION;
843    }
844
845    int fd = -1;
846    status_t err = mLockedBuffer->unlockAsync(&fd);
847    ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
848
849    err = queueBuffer(mLockedBuffer.get(), fd);
850    ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
851            mLockedBuffer->handle, strerror(-err));
852
853    mPostedBuffer = mLockedBuffer;
854    mLockedBuffer = 0;
855    return err;
856}
857
858}; // namespace android
859