Surface.cpp revision d723bd7669b4fc88dc282d8bf8ba5ecb2849d22f 
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#include <utils/NativeHandle.h>
28
29#include <ui/Fence.h>
30
31#include <gui/IProducerListener.h>
32#include <gui/ISurfaceComposer.h>
33#include <gui/SurfaceComposerClient.h>
34#include <gui/GLConsumer.h>
35#include <gui/Surface.h>
36
37#include <private/gui/ComposerService.h>
38
39namespace android {
40
41Surface::Surface(
42        const sp<IGraphicBufferProducer>& bufferProducer,
43        bool controlledByApp)
44    : mGraphicBufferProducer(bufferProducer)
45{
46    // Initialize the ANativeWindow function pointers.
47    ANativeWindow::setSwapInterval  = hook_setSwapInterval;
48    ANativeWindow::dequeueBuffer    = hook_dequeueBuffer;
49    ANativeWindow::cancelBuffer     = hook_cancelBuffer;
50    ANativeWindow::queueBuffer      = hook_queueBuffer;
51    ANativeWindow::query            = hook_query;
52    ANativeWindow::perform          = hook_perform;
53
54    ANativeWindow::dequeueBuffer_DEPRECATED = hook_dequeueBuffer_DEPRECATED;
55    ANativeWindow::cancelBuffer_DEPRECATED  = hook_cancelBuffer_DEPRECATED;
56    ANativeWindow::lockBuffer_DEPRECATED    = hook_lockBuffer_DEPRECATED;
57    ANativeWindow::queueBuffer_DEPRECATED   = hook_queueBuffer_DEPRECATED;
58
59    const_cast<int&>(ANativeWindow::minSwapInterval) = 0;
60    const_cast<int&>(ANativeWindow::maxSwapInterval) = 1;
61
62    mReqWidth = 0;
63    mReqHeight = 0;
64    mReqFormat = 0;
65    mReqUsage = 0;
66    mTimestamp = NATIVE_WINDOW_TIMESTAMP_AUTO;
67    mCrop.clear();
68    mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
69    mTransform = 0;
70    mStickyTransform = 0;
71    mDefaultWidth = 0;
72    mDefaultHeight = 0;
73    mUserWidth = 0;
74    mUserHeight = 0;
75    mTransformHint = 0;
76    mConsumerRunningBehind = false;
77    mConnectedToCpu = false;
78    mProducerControlledByApp = controlledByApp;
79    mSwapIntervalZero = false;
80}
81
82Surface::~Surface() {
83    if (mConnectedToCpu) {
84        Surface::disconnect(NATIVE_WINDOW_API_CPU);
85    }
86}
87
88sp<IGraphicBufferProducer> Surface::getIGraphicBufferProducer() const {
89    return mGraphicBufferProducer;
90}
91
92void Surface::setSidebandStream(const sp<NativeHandle>& stream) {
93    mGraphicBufferProducer->setSidebandStream(stream);
94}
95
96void Surface::allocateBuffers() {
97    uint32_t reqWidth = mReqWidth ? mReqWidth : mUserWidth;
98    uint32_t reqHeight = mReqHeight ? mReqHeight : mUserHeight;
99    mGraphicBufferProducer->allocateBuffers(mSwapIntervalZero, mReqWidth,
100            mReqHeight, mReqFormat, mReqUsage);
101}
102
103int Surface::hook_setSwapInterval(ANativeWindow* window, int interval) {
104    Surface* c = getSelf(window);
105    return c->setSwapInterval(interval);
106}
107
108int Surface::hook_dequeueBuffer(ANativeWindow* window,
109        ANativeWindowBuffer** buffer, int* fenceFd) {
110    Surface* c = getSelf(window);
111    return c->dequeueBuffer(buffer, fenceFd);
112}
113
114int Surface::hook_cancelBuffer(ANativeWindow* window,
115        ANativeWindowBuffer* buffer, int fenceFd) {
116    Surface* c = getSelf(window);
117    return c->cancelBuffer(buffer, fenceFd);
118}
119
120int Surface::hook_queueBuffer(ANativeWindow* window,
121        ANativeWindowBuffer* buffer, int fenceFd) {
122    Surface* c = getSelf(window);
123    return c->queueBuffer(buffer, fenceFd);
124}
125
126int Surface::hook_dequeueBuffer_DEPRECATED(ANativeWindow* window,
127        ANativeWindowBuffer** buffer) {
128    Surface* c = getSelf(window);
129    ANativeWindowBuffer* buf;
130    int fenceFd = -1;
131    int result = c->dequeueBuffer(&buf, &fenceFd);
132    sp<Fence> fence(new Fence(fenceFd));
133    int waitResult = fence->waitForever("dequeueBuffer_DEPRECATED");
134    if (waitResult != OK) {
135        ALOGE("dequeueBuffer_DEPRECATED: Fence::wait returned an error: %d",
136                waitResult);
137        c->cancelBuffer(buf, -1);
138        return waitResult;
139    }
140    *buffer = buf;
141    return result;
142}
143
144int Surface::hook_cancelBuffer_DEPRECATED(ANativeWindow* window,
145        ANativeWindowBuffer* buffer) {
146    Surface* c = getSelf(window);
147    return c->cancelBuffer(buffer, -1);
148}
149
150int Surface::hook_lockBuffer_DEPRECATED(ANativeWindow* window,
151        ANativeWindowBuffer* buffer) {
152    Surface* c = getSelf(window);
153    return c->lockBuffer_DEPRECATED(buffer);
154}
155
156int Surface::hook_queueBuffer_DEPRECATED(ANativeWindow* window,
157        ANativeWindowBuffer* buffer) {
158    Surface* c = getSelf(window);
159    return c->queueBuffer(buffer, -1);
160}
161
162int Surface::hook_query(const ANativeWindow* window,
163                                int what, int* value) {
164    const Surface* c = getSelf(window);
165    return c->query(what, value);
166}
167
168int Surface::hook_perform(ANativeWindow* window, int operation, ...) {
169    va_list args;
170    va_start(args, operation);
171    Surface* c = getSelf(window);
172    return c->perform(operation, args);
173}
174
175int Surface::setSwapInterval(int interval) {
176    ATRACE_CALL();
177    // EGL specification states:
178    //  interval is silently clamped to minimum and maximum implementation
179    //  dependent values before being stored.
180
181    if (interval < minSwapInterval)
182        interval = minSwapInterval;
183
184    if (interval > maxSwapInterval)
185        interval = maxSwapInterval;
186
187    mSwapIntervalZero = (interval == 0);
188
189    return NO_ERROR;
190}
191
192int Surface::dequeueBuffer(android_native_buffer_t** buffer, int* fenceFd) {
193    ATRACE_CALL();
194    ALOGV("Surface::dequeueBuffer");
195
196    uint32_t reqWidth;
197    uint32_t reqHeight;
198    bool swapIntervalZero;
199    PixelFormat reqFormat;
200    uint32_t reqUsage;
201
202    {
203        Mutex::Autolock lock(mMutex);
204
205        reqWidth = mReqWidth ? mReqWidth : mUserWidth;
206        reqHeight = mReqHeight ? mReqHeight : mUserHeight;
207
208        swapIntervalZero = mSwapIntervalZero;
209        reqFormat = mReqFormat;
210        reqUsage = mReqUsage;
211    } // Drop the lock so that we can still touch the Surface while blocking in IGBP::dequeueBuffer
212
213    int buf = -1;
214    sp<Fence> fence;
215    status_t result = mGraphicBufferProducer->dequeueBuffer(&buf, &fence, swapIntervalZero,
216            reqWidth, reqHeight, reqFormat, reqUsage);
217
218    if (result < 0) {
219        ALOGV("dequeueBuffer: IGraphicBufferProducer::dequeueBuffer(%d, %d, %d, %d, %d)"
220             "failed: %d", swapIntervalZero, reqWidth, reqHeight, reqFormat,
221             reqUsage, result);
222        return result;
223    }
224
225    Mutex::Autolock lock(mMutex);
226
227    sp<GraphicBuffer>& gbuf(mSlots[buf].buffer);
228
229    // this should never happen
230    ALOGE_IF(fence == NULL, "Surface::dequeueBuffer: received null Fence! buf=%d", buf);
231
232    if (result & IGraphicBufferProducer::RELEASE_ALL_BUFFERS) {
233        freeAllBuffers();
234    }
235
236    if ((result & IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION) || gbuf == 0) {
237        result = mGraphicBufferProducer->requestBuffer(buf, &gbuf);
238        if (result != NO_ERROR) {
239            ALOGE("dequeueBuffer: IGraphicBufferProducer::requestBuffer failed: %d", result);
240            mGraphicBufferProducer->cancelBuffer(buf, fence);
241            return result;
242        }
243    }
244
245    if (fence->isValid()) {
246        *fenceFd = fence->dup();
247        if (*fenceFd == -1) {
248            ALOGE("dequeueBuffer: error duping fence: %d", errno);
249            // dup() should never fail; something is badly wrong. Soldier on
250            // and hope for the best; the worst that should happen is some
251            // visible corruption that lasts until the next frame.
252        }
253    } else {
254        *fenceFd = -1;
255    }
256
257    *buffer = gbuf.get();
258    return OK;
259}
260
261int Surface::cancelBuffer(android_native_buffer_t* buffer,
262        int fenceFd) {
263    ATRACE_CALL();
264    ALOGV("Surface::cancelBuffer");
265    Mutex::Autolock lock(mMutex);
266    int i = getSlotFromBufferLocked(buffer);
267    if (i < 0) {
268        return i;
269    }
270    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
271    mGraphicBufferProducer->cancelBuffer(i, fence);
272    return OK;
273}
274
275int Surface::getSlotFromBufferLocked(
276        android_native_buffer_t* buffer) const {
277    bool dumpedState = false;
278    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
279        if (mSlots[i].buffer != NULL &&
280                mSlots[i].buffer->handle == buffer->handle) {
281            return i;
282        }
283    }
284    ALOGE("getSlotFromBufferLocked: unknown buffer: %p", buffer->handle);
285    return BAD_VALUE;
286}
287
288int Surface::lockBuffer_DEPRECATED(android_native_buffer_t* buffer __attribute__((unused))) {
289    ALOGV("Surface::lockBuffer");
290    Mutex::Autolock lock(mMutex);
291    return OK;
292}
293
294int Surface::queueBuffer(android_native_buffer_t* buffer, int fenceFd) {
295    ATRACE_CALL();
296    ALOGV("Surface::queueBuffer");
297    Mutex::Autolock lock(mMutex);
298    int64_t timestamp;
299    bool isAutoTimestamp = false;
300    if (mTimestamp == NATIVE_WINDOW_TIMESTAMP_AUTO) {
301        timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
302        isAutoTimestamp = true;
303        ALOGV("Surface::queueBuffer making up timestamp: %.2f ms",
304            timestamp / 1000000.f);
305    } else {
306        timestamp = mTimestamp;
307    }
308    int i = getSlotFromBufferLocked(buffer);
309    if (i < 0) {
310        return i;
311    }
312
313
314    // Make sure the crop rectangle is entirely inside the buffer.
315    Rect crop;
316    mCrop.intersect(Rect(buffer->width, buffer->height), &crop);
317
318    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : Fence::NO_FENCE);
319    IGraphicBufferProducer::QueueBufferOutput output;
320    IGraphicBufferProducer::QueueBufferInput input(timestamp, isAutoTimestamp,
321            crop, mScalingMode, mTransform ^ mStickyTransform, mSwapIntervalZero,
322            fence, mStickyTransform);
323    status_t err = mGraphicBufferProducer->queueBuffer(i, input, &output);
324    if (err != OK)  {
325        ALOGE("queueBuffer: error queuing buffer to SurfaceTexture, %d", err);
326    }
327    uint32_t numPendingBuffers = 0;
328    uint32_t hint = 0;
329    output.deflate(&mDefaultWidth, &mDefaultHeight, &hint,
330            &numPendingBuffers);
331
332    // Disable transform hint if sticky transform is set.
333    if (mStickyTransform == 0) {
334        mTransformHint = hint;
335    }
336
337    mConsumerRunningBehind = (numPendingBuffers >= 2);
338
339    return err;
340}
341
342int Surface::query(int what, int* value) const {
343    ATRACE_CALL();
344    ALOGV("Surface::query");
345    { // scope for the lock
346        Mutex::Autolock lock(mMutex);
347        switch (what) {
348            case NATIVE_WINDOW_FORMAT:
349                if (mReqFormat) {
350                    *value = static_cast<int>(mReqFormat);
351                    return NO_ERROR;
352                }
353                break;
354            case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER: {
355                sp<ISurfaceComposer> composer(
356                        ComposerService::getComposerService());
357                if (composer->authenticateSurfaceTexture(mGraphicBufferProducer)) {
358                    *value = 1;
359                } else {
360                    *value = 0;
361                }
362                return NO_ERROR;
363            }
364            case NATIVE_WINDOW_CONCRETE_TYPE:
365                *value = NATIVE_WINDOW_SURFACE;
366                return NO_ERROR;
367            case NATIVE_WINDOW_DEFAULT_WIDTH:
368                *value = static_cast<int>(
369                        mUserWidth ? mUserWidth : mDefaultWidth);
370                return NO_ERROR;
371            case NATIVE_WINDOW_DEFAULT_HEIGHT:
372                *value = static_cast<int>(
373                        mUserHeight ? mUserHeight : mDefaultHeight);
374                return NO_ERROR;
375            case NATIVE_WINDOW_TRANSFORM_HINT:
376                *value = static_cast<int>(mTransformHint);
377                return NO_ERROR;
378            case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND: {
379                status_t err = NO_ERROR;
380                if (!mConsumerRunningBehind) {
381                    *value = 0;
382                } else {
383                    err = mGraphicBufferProducer->query(what, value);
384                    if (err == NO_ERROR) {
385                        mConsumerRunningBehind = *value;
386                    }
387                }
388                return err;
389            }
390        }
391    }
392    return mGraphicBufferProducer->query(what, value);
393}
394
395int Surface::perform(int operation, va_list args)
396{
397    int res = NO_ERROR;
398    switch (operation) {
399    case NATIVE_WINDOW_CONNECT:
400        // deprecated. must return NO_ERROR.
401        break;
402    case NATIVE_WINDOW_DISCONNECT:
403        // deprecated. must return NO_ERROR.
404        break;
405    case NATIVE_WINDOW_SET_USAGE:
406        res = dispatchSetUsage(args);
407        break;
408    case NATIVE_WINDOW_SET_CROP:
409        res = dispatchSetCrop(args);
410        break;
411    case NATIVE_WINDOW_SET_BUFFER_COUNT:
412        res = dispatchSetBufferCount(args);
413        break;
414    case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
415        res = dispatchSetBuffersGeometry(args);
416        break;
417    case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
418        res = dispatchSetBuffersTransform(args);
419        break;
420    case NATIVE_WINDOW_SET_BUFFERS_STICKY_TRANSFORM:
421        res = dispatchSetBuffersStickyTransform(args);
422        break;
423    case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
424        res = dispatchSetBuffersTimestamp(args);
425        break;
426    case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
427        res = dispatchSetBuffersDimensions(args);
428        break;
429    case NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS:
430        res = dispatchSetBuffersUserDimensions(args);
431        break;
432    case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
433        res = dispatchSetBuffersFormat(args);
434        break;
435    case NATIVE_WINDOW_LOCK:
436        res = dispatchLock(args);
437        break;
438    case NATIVE_WINDOW_UNLOCK_AND_POST:
439        res = dispatchUnlockAndPost(args);
440        break;
441    case NATIVE_WINDOW_SET_SCALING_MODE:
442        res = dispatchSetScalingMode(args);
443        break;
444    case NATIVE_WINDOW_API_CONNECT:
445        res = dispatchConnect(args);
446        break;
447    case NATIVE_WINDOW_API_DISCONNECT:
448        res = dispatchDisconnect(args);
449        break;
450    case NATIVE_WINDOW_SET_SIDEBAND_STREAM:
451        res = dispatchSetSidebandStream(args);
452        break;
453    default:
454        res = NAME_NOT_FOUND;
455        break;
456    }
457    return res;
458}
459
460int Surface::dispatchConnect(va_list args) {
461    int api = va_arg(args, int);
462    return connect(api);
463}
464
465int Surface::dispatchDisconnect(va_list args) {
466    int api = va_arg(args, int);
467    return disconnect(api);
468}
469
470int Surface::dispatchSetUsage(va_list args) {
471    int usage = va_arg(args, int);
472    return setUsage(static_cast<uint32_t>(usage));
473}
474
475int Surface::dispatchSetCrop(va_list args) {
476    android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
477    return setCrop(reinterpret_cast<Rect const*>(rect));
478}
479
480int Surface::dispatchSetBufferCount(va_list args) {
481    size_t bufferCount = va_arg(args, size_t);
482    return setBufferCount(static_cast<int32_t>(bufferCount));
483}
484
485int Surface::dispatchSetBuffersGeometry(va_list args) {
486    uint32_t width = va_arg(args, uint32_t);
487    uint32_t height = va_arg(args, uint32_t);
488    PixelFormat format = va_arg(args, PixelFormat);
489    int err = setBuffersDimensions(width, height);
490    if (err != 0) {
491        return err;
492    }
493    return setBuffersFormat(format);
494}
495
496int Surface::dispatchSetBuffersDimensions(va_list args) {
497    uint32_t width = va_arg(args, uint32_t);
498    uint32_t height = va_arg(args, uint32_t);
499    return setBuffersDimensions(width, height);
500}
501
502int Surface::dispatchSetBuffersUserDimensions(va_list args) {
503    uint32_t width = va_arg(args, uint32_t);
504    uint32_t height = va_arg(args, uint32_t);
505    return setBuffersUserDimensions(width, height);
506}
507
508int Surface::dispatchSetBuffersFormat(va_list args) {
509    PixelFormat format = va_arg(args, PixelFormat);
510    return setBuffersFormat(format);
511}
512
513int Surface::dispatchSetScalingMode(va_list args) {
514    int mode = va_arg(args, int);
515    return setScalingMode(mode);
516}
517
518int Surface::dispatchSetBuffersTransform(va_list args) {
519    uint32_t transform = va_arg(args, uint32_t);
520    return setBuffersTransform(transform);
521}
522
523int Surface::dispatchSetBuffersStickyTransform(va_list args) {
524    uint32_t transform = va_arg(args, uint32_t);
525    return setBuffersStickyTransform(transform);
526}
527
528int Surface::dispatchSetBuffersTimestamp(va_list args) {
529    int64_t timestamp = va_arg(args, int64_t);
530    return setBuffersTimestamp(timestamp);
531}
532
533int Surface::dispatchLock(va_list args) {
534    ANativeWindow_Buffer* outBuffer = va_arg(args, ANativeWindow_Buffer*);
535    ARect* inOutDirtyBounds = va_arg(args, ARect*);
536    return lock(outBuffer, inOutDirtyBounds);
537}
538
539int Surface::dispatchUnlockAndPost(va_list args __attribute__((unused))) {
540    return unlockAndPost();
541}
542
543int Surface::dispatchSetSidebandStream(va_list args) {
544    native_handle_t* sH = va_arg(args, native_handle_t*);
545    sp<NativeHandle> sidebandHandle = NativeHandle::create(sH, false);
546    setSidebandStream(sidebandHandle);
547    return OK;
548}
549
550int Surface::connect(int api) {
551    ATRACE_CALL();
552    ALOGV("Surface::connect");
553    static sp<IProducerListener> listener = new DummyProducerListener();
554    Mutex::Autolock lock(mMutex);
555    IGraphicBufferProducer::QueueBufferOutput output;
556    int err = mGraphicBufferProducer->connect(listener, api, mProducerControlledByApp, &output);
557    if (err == NO_ERROR) {
558        uint32_t numPendingBuffers = 0;
559        uint32_t hint = 0;
560        output.deflate(&mDefaultWidth, &mDefaultHeight, &hint,
561                &numPendingBuffers);
562
563        // Disable transform hint if sticky transform is set.
564        if (mStickyTransform == 0) {
565            mTransformHint = hint;
566        }
567
568        mConsumerRunningBehind = (numPendingBuffers >= 2);
569    }
570    if (!err && api == NATIVE_WINDOW_API_CPU) {
571        mConnectedToCpu = true;
572    }
573    return err;
574}
575
576
577int Surface::disconnect(int api) {
578    ATRACE_CALL();
579    ALOGV("Surface::disconnect");
580    Mutex::Autolock lock(mMutex);
581    freeAllBuffers();
582    int err = mGraphicBufferProducer->disconnect(api);
583    if (!err) {
584        mReqFormat = 0;
585        mReqWidth = 0;
586        mReqHeight = 0;
587        mReqUsage = 0;
588        mCrop.clear();
589        mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
590        mTransform = 0;
591        mStickyTransform = 0;
592
593        if (api == NATIVE_WINDOW_API_CPU) {
594            mConnectedToCpu = false;
595        }
596    }
597    return err;
598}
599
600int Surface::setUsage(uint32_t reqUsage)
601{
602    ALOGV("Surface::setUsage");
603    Mutex::Autolock lock(mMutex);
604    mReqUsage = reqUsage;
605    return OK;
606}
607
608int Surface::setCrop(Rect const* rect)
609{
610    ATRACE_CALL();
611
612    Rect realRect;
613    if (rect == NULL || rect->isEmpty()) {
614        realRect.clear();
615    } else {
616        realRect = *rect;
617    }
618
619    ALOGV("Surface::setCrop rect=[%d %d %d %d]",
620            realRect.left, realRect.top, realRect.right, realRect.bottom);
621
622    Mutex::Autolock lock(mMutex);
623    mCrop = realRect;
624    return NO_ERROR;
625}
626
627int Surface::setBufferCount(int bufferCount)
628{
629    ATRACE_CALL();
630    ALOGV("Surface::setBufferCount");
631    Mutex::Autolock lock(mMutex);
632
633    status_t err = mGraphicBufferProducer->setBufferCount(bufferCount);
634    ALOGE_IF(err, "IGraphicBufferProducer::setBufferCount(%d) returned %s",
635            bufferCount, strerror(-err));
636
637    if (err == NO_ERROR) {
638        freeAllBuffers();
639    }
640
641    return err;
642}
643
644int Surface::setBuffersDimensions(uint32_t width, uint32_t height)
645{
646    ATRACE_CALL();
647    ALOGV("Surface::setBuffersDimensions");
648
649    if ((width && !height) || (!width && height))
650        return BAD_VALUE;
651
652    Mutex::Autolock lock(mMutex);
653    mReqWidth = width;
654    mReqHeight = height;
655    return NO_ERROR;
656}
657
658int Surface::setBuffersUserDimensions(uint32_t width, uint32_t height)
659{
660    ATRACE_CALL();
661    ALOGV("Surface::setBuffersUserDimensions");
662
663    if ((width && !height) || (!width && height))
664        return BAD_VALUE;
665
666    Mutex::Autolock lock(mMutex);
667    mUserWidth = width;
668    mUserHeight = height;
669    return NO_ERROR;
670}
671
672int Surface::setBuffersFormat(PixelFormat format)
673{
674    ALOGV("Surface::setBuffersFormat");
675
676    Mutex::Autolock lock(mMutex);
677    mReqFormat = format;
678    return NO_ERROR;
679}
680
681int Surface::setScalingMode(int mode)
682{
683    ATRACE_CALL();
684    ALOGV("Surface::setScalingMode(%d)", mode);
685
686    switch (mode) {
687        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
688        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
689        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
690            break;
691        default:
692            ALOGE("unknown scaling mode: %d", mode);
693            return BAD_VALUE;
694    }
695
696    Mutex::Autolock lock(mMutex);
697    mScalingMode = mode;
698    return NO_ERROR;
699}
700
701int Surface::setBuffersTransform(uint32_t transform)
702{
703    ATRACE_CALL();
704    ALOGV("Surface::setBuffersTransform");
705    Mutex::Autolock lock(mMutex);
706    mTransform = transform;
707    return NO_ERROR;
708}
709
710int Surface::setBuffersStickyTransform(uint32_t transform)
711{
712    ATRACE_CALL();
713    ALOGV("Surface::setBuffersStickyTransform");
714    Mutex::Autolock lock(mMutex);
715    mStickyTransform = transform;
716    return NO_ERROR;
717}
718
719int Surface::setBuffersTimestamp(int64_t timestamp)
720{
721    ALOGV("Surface::setBuffersTimestamp");
722    Mutex::Autolock lock(mMutex);
723    mTimestamp = timestamp;
724    return NO_ERROR;
725}
726
727void Surface::freeAllBuffers() {
728    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
729        mSlots[i].buffer = 0;
730    }
731}
732
733// ----------------------------------------------------------------------
734// the lock/unlock APIs must be used from the same thread
735
736static status_t copyBlt(
737        const sp<GraphicBuffer>& dst,
738        const sp<GraphicBuffer>& src,
739        const Region& reg)
740{
741    // src and dst with, height and format must be identical. no verification
742    // is done here.
743    status_t err;
744    uint8_t* src_bits = NULL;
745    err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(),
746            reinterpret_cast<void**>(&src_bits));
747    ALOGE_IF(err, "error locking src buffer %s", strerror(-err));
748
749    uint8_t* dst_bits = NULL;
750    err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(),
751            reinterpret_cast<void**>(&dst_bits));
752    ALOGE_IF(err, "error locking dst buffer %s", strerror(-err));
753
754    Region::const_iterator head(reg.begin());
755    Region::const_iterator tail(reg.end());
756    if (head != tail && src_bits && dst_bits) {
757        const size_t bpp = bytesPerPixel(src->format);
758        const size_t dbpr = static_cast<uint32_t>(dst->stride) * bpp;
759        const size_t sbpr = static_cast<uint32_t>(src->stride) * bpp;
760
761        while (head != tail) {
762            const Rect& r(*head++);
763            int32_t h = r.height();
764            if (h <= 0) continue;
765            size_t size = static_cast<uint32_t>(r.width()) * bpp;
766            uint8_t const * s = src_bits +
767                    static_cast<uint32_t>(r.left + src->stride * r.top) * bpp;
768            uint8_t       * d = dst_bits +
769                    static_cast<uint32_t>(r.left + dst->stride * r.top) * bpp;
770            if (dbpr==sbpr && size==sbpr) {
771                size *= static_cast<size_t>(h);
772                h = 1;
773            }
774            do {
775                memcpy(d, s, size);
776                d += dbpr;
777                s += sbpr;
778            } while (--h > 0);
779        }
780    }
781
782    if (src_bits)
783        src->unlock();
784
785    if (dst_bits)
786        dst->unlock();
787
788    return err;
789}
790
791// ----------------------------------------------------------------------------
792
793status_t Surface::lock(
794        ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds)
795{
796    if (mLockedBuffer != 0) {
797        ALOGE("Surface::lock failed, already locked");
798        return INVALID_OPERATION;
799    }
800
801    if (!mConnectedToCpu) {
802        int err = Surface::connect(NATIVE_WINDOW_API_CPU);
803        if (err) {
804            return err;
805        }
806        // we're intending to do software rendering from this point
807        setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
808    }
809
810    ANativeWindowBuffer* out;
811    int fenceFd = -1;
812    status_t err = dequeueBuffer(&out, &fenceFd);
813    ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
814    if (err == NO_ERROR) {
815        sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
816        const Rect bounds(backBuffer->width, backBuffer->height);
817
818        Region newDirtyRegion;
819        if (inOutDirtyBounds) {
820            newDirtyRegion.set(static_cast<Rect const&>(*inOutDirtyBounds));
821            newDirtyRegion.andSelf(bounds);
822        } else {
823            newDirtyRegion.set(bounds);
824        }
825
826        // figure out if we can copy the frontbuffer back
827        const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
828        const bool canCopyBack = (frontBuffer != 0 &&
829                backBuffer->width  == frontBuffer->width &&
830                backBuffer->height == frontBuffer->height &&
831                backBuffer->format == frontBuffer->format);
832
833        if (canCopyBack) {
834            // copy the area that is invalid and not repainted this round
835            const Region copyback(mDirtyRegion.subtract(newDirtyRegion));
836            if (!copyback.isEmpty())
837                copyBlt(backBuffer, frontBuffer, copyback);
838        } else {
839            // if we can't copy-back anything, modify the user's dirty
840            // region to make sure they redraw the whole buffer
841            newDirtyRegion.set(bounds);
842            mDirtyRegion.clear();
843            Mutex::Autolock lock(mMutex);
844            for (size_t i=0 ; i<NUM_BUFFER_SLOTS ; i++) {
845                mSlots[i].dirtyRegion.clear();
846            }
847        }
848
849
850        { // scope for the lock
851            Mutex::Autolock lock(mMutex);
852            int backBufferSlot(getSlotFromBufferLocked(backBuffer.get()));
853            if (backBufferSlot >= 0) {
854                Region& dirtyRegion(mSlots[backBufferSlot].dirtyRegion);
855                mDirtyRegion.subtract(dirtyRegion);
856                dirtyRegion = newDirtyRegion;
857            }
858        }
859
860        mDirtyRegion.orSelf(newDirtyRegion);
861        if (inOutDirtyBounds) {
862            *inOutDirtyBounds = newDirtyRegion.getBounds();
863        }
864
865        void* vaddr;
866        status_t res = backBuffer->lockAsync(
867                GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
868                newDirtyRegion.bounds(), &vaddr, fenceFd);
869
870        ALOGW_IF(res, "failed locking buffer (handle = %p)",
871                backBuffer->handle);
872
873        if (res != 0) {
874            err = INVALID_OPERATION;
875        } else {
876            mLockedBuffer = backBuffer;
877            outBuffer->width  = backBuffer->width;
878            outBuffer->height = backBuffer->height;
879            outBuffer->stride = backBuffer->stride;
880            outBuffer->format = backBuffer->format;
881            outBuffer->bits   = vaddr;
882        }
883    }
884    return err;
885}
886
887status_t Surface::unlockAndPost()
888{
889    if (mLockedBuffer == 0) {
890        ALOGE("Surface::unlockAndPost failed, no locked buffer");
891        return INVALID_OPERATION;
892    }
893
894    int fd = -1;
895    status_t err = mLockedBuffer->unlockAsync(&fd);
896    ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
897
898    err = queueBuffer(mLockedBuffer.get(), fd);
899    ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
900            mLockedBuffer->handle, strerror(-err));
901
902    mPostedBuffer = mLockedBuffer;
903    mLockedBuffer = 0;
904    return err;
905}
906
907}; // namespace android
908