SurfaceFlinger.cpp revision fddc28d87136b55f0d9613e5f8ecd64a6aca018d 
1/*
2 * Copyright (C) 2007 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 ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <stdint.h>
22#include <unistd.h>
23#include <fcntl.h>
24#include <errno.h>
25#include <math.h>
26#include <limits.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/ioctl.h>
30
31#include <cutils/log.h>
32#include <cutils/properties.h>
33
34#include <binder/IPCThreadState.h>
35#include <binder/IServiceManager.h>
36#include <binder/MemoryHeapBase.h>
37#include <binder/PermissionCache.h>
38
39#include <gui/IDisplayEventConnection.h>
40
41#include <utils/String8.h>
42#include <utils/String16.h>
43#include <utils/StopWatch.h>
44#include <utils/Trace.h>
45
46#include <ui/GraphicBufferAllocator.h>
47#include <ui/PixelFormat.h>
48
49#include <GLES/gl.h>
50
51#include "clz.h"
52#include "DdmConnection.h"
53#include "DisplayEventConnection.h"
54#include "EventThread.h"
55#include "GLExtensions.h"
56#include "Layer.h"
57#include "LayerDim.h"
58#include "LayerScreenshot.h"
59#include "SurfaceFlinger.h"
60
61#include "DisplayHardware/DisplayHardware.h"
62#include "DisplayHardware/HWComposer.h"
63
64#include <private/android_filesystem_config.h>
65#include <private/gui/SharedBufferStack.h>
66
67#define EGL_VERSION_HW_ANDROID  0x3143
68
69#define DISPLAY_COUNT       1
70
71namespace android {
72// ---------------------------------------------------------------------------
73
74const String16 sHardwareTest("android.permission.HARDWARE_TEST");
75const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
76const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
77const String16 sDump("android.permission.DUMP");
78
79// ---------------------------------------------------------------------------
80
81SurfaceFlinger::SurfaceFlinger()
82    :   BnSurfaceComposer(), Thread(false),
83        mTransactionFlags(0),
84        mTransationPending(false),
85        mLayersRemoved(false),
86        mBootTime(systemTime()),
87        mVisibleRegionsDirty(false),
88        mHwWorkListDirty(false),
89        mElectronBeamAnimationMode(0),
90        mDebugRegion(0),
91        mDebugBackground(0),
92        mDebugDDMS(0),
93        mDebugDisableHWC(0),
94        mDebugDisableTransformHint(0),
95        mDebugInSwapBuffers(0),
96        mLastSwapBufferTime(0),
97        mDebugInTransaction(0),
98        mLastTransactionTime(0),
99        mBootFinished(false),
100        mConsoleSignals(0),
101        mSecureFrameBuffer(0)
102{
103    init();
104}
105
106void SurfaceFlinger::init()
107{
108    ALOGI("SurfaceFlinger is starting");
109
110    // debugging stuff...
111    char value[PROPERTY_VALUE_MAX];
112
113    property_get("debug.sf.showupdates", value, "0");
114    mDebugRegion = atoi(value);
115
116    property_get("debug.sf.showbackground", value, "0");
117    mDebugBackground = atoi(value);
118
119    property_get("debug.sf.ddms", value, "0");
120    mDebugDDMS = atoi(value);
121    if (mDebugDDMS) {
122        DdmConnection::start(getServiceName());
123    }
124
125    ALOGI_IF(mDebugRegion,       "showupdates enabled");
126    ALOGI_IF(mDebugBackground,   "showbackground enabled");
127    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
128}
129
130void SurfaceFlinger::onFirstRef()
131{
132    mEventQueue.init(this);
133
134    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
135
136    // Wait for the main thread to be done with its initialization
137    mReadyToRunBarrier.wait();
138}
139
140
141SurfaceFlinger::~SurfaceFlinger()
142{
143    glDeleteTextures(1, &mWormholeTexName);
144}
145
146void SurfaceFlinger::binderDied(const wp<IBinder>& who)
147{
148    // the window manager died on us. prepare its eulogy.
149
150    // reset screen orientation
151    Vector<ComposerState> state;
152    setTransactionState(state, eOrientationDefault, 0);
153
154    // restart the boot-animation
155    property_set("ctl.start", "bootanim");
156}
157
158sp<IMemoryHeap> SurfaceFlinger::getCblk() const
159{
160    return mServerHeap;
161}
162
163sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
164{
165    sp<ISurfaceComposerClient> bclient;
166    sp<Client> client(new Client(this));
167    status_t err = client->initCheck();
168    if (err == NO_ERROR) {
169        bclient = client;
170    }
171    return bclient;
172}
173
174sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
175{
176    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
177    return gba;
178}
179
180const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
181{
182    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
183    const GraphicPlane& plane(mGraphicPlanes[dpy]);
184    return plane;
185}
186
187GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
188{
189    return const_cast<GraphicPlane&>(
190        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
191}
192
193void SurfaceFlinger::bootFinished()
194{
195    const nsecs_t now = systemTime();
196    const nsecs_t duration = now - mBootTime;
197    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
198    mBootFinished = true;
199
200    // wait patiently for the window manager death
201    const String16 name("window");
202    sp<IBinder> window(defaultServiceManager()->getService(name));
203    if (window != 0) {
204        window->linkToDeath(this);
205    }
206
207    // stop boot animation
208    property_set("ctl.stop", "bootanim");
209}
210
211static inline uint16_t pack565(int r, int g, int b) {
212    return (r<<11)|(g<<5)|b;
213}
214
215status_t SurfaceFlinger::readyToRun()
216{
217    ALOGI(   "SurfaceFlinger's main thread ready to run. "
218            "Initializing graphics H/W...");
219
220    // we only support one display currently
221    int dpy = 0;
222
223    {
224        // initialize the main display
225        GraphicPlane& plane(graphicPlane(dpy));
226        DisplayHardware* const hw = new DisplayHardware(this, dpy);
227        plane.setDisplayHardware(hw);
228    }
229
230    // create the shared control-block
231    mServerHeap = new MemoryHeapBase(4096,
232            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
233    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
234
235    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
236    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
237
238    new(mServerCblk) surface_flinger_cblk_t;
239
240    // initialize primary screen
241    // (other display should be initialized in the same manner, but
242    // asynchronously, as they could come and go. None of this is supported
243    // yet).
244    const GraphicPlane& plane(graphicPlane(dpy));
245    const DisplayHardware& hw = plane.displayHardware();
246    const uint32_t w = hw.getWidth();
247    const uint32_t h = hw.getHeight();
248    const uint32_t f = hw.getFormat();
249    hw.makeCurrent();
250
251    // initialize the shared control block
252    mServerCblk->connected |= 1<<dpy;
253    display_cblk_t* dcblk = mServerCblk->displays + dpy;
254    memset(dcblk, 0, sizeof(display_cblk_t));
255    dcblk->w            = plane.getWidth();
256    dcblk->h            = plane.getHeight();
257    dcblk->format       = f;
258    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
259    dcblk->xdpi         = hw.getDpiX();
260    dcblk->ydpi         = hw.getDpiY();
261    dcblk->fps          = hw.getRefreshRate();
262    dcblk->density      = hw.getDensity();
263
264    // Initialize OpenGL|ES
265    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
266    glPixelStorei(GL_PACK_ALIGNMENT, 4);
267    glEnableClientState(GL_VERTEX_ARRAY);
268    glEnable(GL_SCISSOR_TEST);
269    glShadeModel(GL_FLAT);
270    glDisable(GL_DITHER);
271    glDisable(GL_CULL_FACE);
272
273    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
274    const uint16_t g1 = pack565(0x17,0x2f,0x17);
275    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
276    glGenTextures(1, &mWormholeTexName);
277    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
278    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
282    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
283            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
284
285    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
286    glGenTextures(1, &mProtectedTexName);
287    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
288    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
292    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
293            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
294
295    glViewport(0, 0, w, h);
296    glMatrixMode(GL_PROJECTION);
297    glLoadIdentity();
298    // put the origin in the left-bottom corner
299    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
300
301
302    // start the EventThread
303    mEventThread = new EventThread(this);
304    mEventQueue.setEventThread(mEventThread);
305    hw.startSleepManagement();
306
307    /*
308     *  We're now ready to accept clients...
309     */
310
311    mReadyToRunBarrier.open();
312
313    // start boot animation
314    property_set("ctl.start", "bootanim");
315
316    return NO_ERROR;
317}
318
319// ----------------------------------------------------------------------------
320
321bool SurfaceFlinger::authenticateSurfaceTexture(
322        const sp<ISurfaceTexture>& surfaceTexture) const {
323    Mutex::Autolock _l(mStateLock);
324    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
325
326    // Check the visible layer list for the ISurface
327    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
328    size_t count = currentLayers.size();
329    for (size_t i=0 ; i<count ; i++) {
330        const sp<LayerBase>& layer(currentLayers[i]);
331        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
332        if (lbc != NULL) {
333            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
334            if (lbcBinder == surfaceTextureBinder) {
335                return true;
336            }
337        }
338    }
339
340    // Check the layers in the purgatory.  This check is here so that if a
341    // SurfaceTexture gets destroyed before all the clients are done using it,
342    // the error will not be reported as "surface XYZ is not authenticated", but
343    // will instead fail later on when the client tries to use the surface,
344    // which should be reported as "surface XYZ returned an -ENODEV".  The
345    // purgatorized layers are no less authentic than the visible ones, so this
346    // should not cause any harm.
347    size_t purgatorySize =  mLayerPurgatory.size();
348    for (size_t i=0 ; i<purgatorySize ; i++) {
349        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
350        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
351        if (lbc != NULL) {
352            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
353            if (lbcBinder == surfaceTextureBinder) {
354                return true;
355            }
356        }
357    }
358
359    return false;
360}
361
362// ----------------------------------------------------------------------------
363
364sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
365    return mEventThread->createEventConnection();
366}
367
368// ----------------------------------------------------------------------------
369
370void SurfaceFlinger::waitForEvent() {
371    mEventQueue.waitMessage();
372}
373
374void SurfaceFlinger::signalTransaction() {
375    mEventQueue.invalidate();
376}
377
378void SurfaceFlinger::signalLayerUpdate() {
379    mEventQueue.invalidate();
380}
381
382void SurfaceFlinger::signalRefresh() {
383    mEventQueue.refresh();
384}
385
386status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
387        nsecs_t reltime, uint32_t flags) {
388    return mEventQueue.postMessage(msg, reltime);
389}
390
391status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
392        nsecs_t reltime, uint32_t flags) {
393    status_t res = mEventQueue.postMessage(msg, reltime);
394    if (res == NO_ERROR) {
395        msg->wait();
396    }
397    return res;
398}
399
400bool SurfaceFlinger::threadLoop()
401{
402    waitForEvent();
403    return true;
404}
405
406void SurfaceFlinger::onMessageReceived(int32_t what)
407{
408    ATRACE_CALL();
409    switch (what) {
410        case MessageQueue::REFRESH: {
411//        case MessageQueue::INVALIDATE: {
412            // check for transactions
413            if (CC_UNLIKELY(mConsoleSignals)) {
414                handleConsoleEvents();
415            }
416
417            // if we're in a global transaction, don't do anything.
418            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
419            uint32_t transactionFlags = peekTransactionFlags(mask);
420            if (CC_UNLIKELY(transactionFlags)) {
421                handleTransaction(transactionFlags);
422            }
423
424            // post surfaces (if needed)
425            handlePageFlip();
426
427//            signalRefresh();
428//
429//        } break;
430//
431//        case MessageQueue::REFRESH: {
432
433            handleRefresh();
434
435            const DisplayHardware& hw(graphicPlane(0).displayHardware());
436
437//            if (mDirtyRegion.isEmpty()) {
438//                return;
439//            }
440
441            if (CC_UNLIKELY(mHwWorkListDirty)) {
442                // build the h/w work list
443                handleWorkList();
444            }
445
446            if (CC_LIKELY(hw.canDraw())) {
447                // repaint the framebuffer (if needed)
448                handleRepaint();
449                // inform the h/w that we're done compositing
450                hw.compositionComplete();
451                postFramebuffer();
452            } else {
453                // pretend we did the post
454                hw.compositionComplete();
455            }
456
457        } break;
458    }
459}
460
461void SurfaceFlinger::postFramebuffer()
462{
463    ATRACE_CALL();
464    // mSwapRegion can be empty here is some cases, for instance if a hidden
465    // or fully transparent window is updating.
466    // in that case, we need to flip anyways to not risk a deadlock with
467    // h/w composer.
468
469    const DisplayHardware& hw(graphicPlane(0).displayHardware());
470    const nsecs_t now = systemTime();
471    mDebugInSwapBuffers = now;
472    hw.flip(mSwapRegion);
473
474    size_t numLayers = mVisibleLayersSortedByZ.size();
475    for (size_t i = 0; i < numLayers; i++) {
476        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
477    }
478
479    mLastSwapBufferTime = systemTime() - now;
480    mDebugInSwapBuffers = 0;
481    mSwapRegion.clear();
482}
483
484void SurfaceFlinger::handleConsoleEvents()
485{
486    // something to do with the console
487    const DisplayHardware& hw = graphicPlane(0).displayHardware();
488
489    int what = android_atomic_and(0, &mConsoleSignals);
490    if (what & eConsoleAcquired) {
491        hw.acquireScreen();
492        // this is a temporary work-around, eventually this should be called
493        // by the power-manager
494        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
495    }
496
497    if (what & eConsoleReleased) {
498        if (hw.isScreenAcquired()) {
499            hw.releaseScreen();
500        }
501    }
502
503    mDirtyRegion.set(hw.bounds());
504}
505
506void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
507{
508    ATRACE_CALL();
509
510    Mutex::Autolock _l(mStateLock);
511    const nsecs_t now = systemTime();
512    mDebugInTransaction = now;
513
514    // Here we're guaranteed that some transaction flags are set
515    // so we can call handleTransactionLocked() unconditionally.
516    // We call getTransactionFlags(), which will also clear the flags,
517    // with mStateLock held to guarantee that mCurrentState won't change
518    // until the transaction is committed.
519
520    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
521    transactionFlags = getTransactionFlags(mask);
522    handleTransactionLocked(transactionFlags);
523
524    mLastTransactionTime = systemTime() - now;
525    mDebugInTransaction = 0;
526    invalidateHwcGeometry();
527    // here the transaction has been committed
528}
529
530void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
531{
532    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
533    const size_t count = currentLayers.size();
534
535    /*
536     * Traversal of the children
537     * (perform the transaction for each of them if needed)
538     */
539
540    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
541    if (layersNeedTransaction) {
542        for (size_t i=0 ; i<count ; i++) {
543            const sp<LayerBase>& layer = currentLayers[i];
544            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
545            if (!trFlags) continue;
546
547            const uint32_t flags = layer->doTransaction(0);
548            if (flags & Layer::eVisibleRegion)
549                mVisibleRegionsDirty = true;
550        }
551    }
552
553    /*
554     * Perform our own transaction if needed
555     */
556
557    if (transactionFlags & eTransactionNeeded) {
558        if (mCurrentState.orientation != mDrawingState.orientation) {
559            // the orientation has changed, recompute all visible regions
560            // and invalidate everything.
561
562            const int dpy = 0;
563            const int orientation = mCurrentState.orientation;
564            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
565            GraphicPlane& plane(graphicPlane(dpy));
566            plane.setOrientation(orientation);
567
568            // update the shared control block
569            const DisplayHardware& hw(plane.displayHardware());
570            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
571            dcblk->orientation = orientation;
572            dcblk->w = plane.getWidth();
573            dcblk->h = plane.getHeight();
574
575            mVisibleRegionsDirty = true;
576            mDirtyRegion.set(hw.bounds());
577        }
578
579        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
580            // layers have been added
581            mVisibleRegionsDirty = true;
582        }
583
584        // some layers might have been removed, so
585        // we need to update the regions they're exposing.
586        if (mLayersRemoved) {
587            mLayersRemoved = false;
588            mVisibleRegionsDirty = true;
589            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
590            const size_t count = previousLayers.size();
591            for (size_t i=0 ; i<count ; i++) {
592                const sp<LayerBase>& layer(previousLayers[i]);
593                if (currentLayers.indexOf( layer ) < 0) {
594                    // this layer is not visible anymore
595                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
596                }
597            }
598        }
599    }
600
601    commitTransaction();
602}
603
604void SurfaceFlinger::computeVisibleRegions(
605    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
606{
607    ATRACE_CALL();
608
609    const GraphicPlane& plane(graphicPlane(0));
610    const Transform& planeTransform(plane.transform());
611    const DisplayHardware& hw(plane.displayHardware());
612    const Region screenRegion(hw.bounds());
613
614    Region aboveOpaqueLayers;
615    Region aboveCoveredLayers;
616    Region dirty;
617
618    bool secureFrameBuffer = false;
619
620    size_t i = currentLayers.size();
621    while (i--) {
622        const sp<LayerBase>& layer = currentLayers[i];
623        layer->validateVisibility(planeTransform);
624
625        // start with the whole surface at its current location
626        const Layer::State& s(layer->drawingState());
627
628        /*
629         * opaqueRegion: area of a surface that is fully opaque.
630         */
631        Region opaqueRegion;
632
633        /*
634         * visibleRegion: area of a surface that is visible on screen
635         * and not fully transparent. This is essentially the layer's
636         * footprint minus the opaque regions above it.
637         * Areas covered by a translucent surface are considered visible.
638         */
639        Region visibleRegion;
640
641        /*
642         * coveredRegion: area of a surface that is covered by all
643         * visible regions above it (which includes the translucent areas).
644         */
645        Region coveredRegion;
646
647
648        // handle hidden surfaces by setting the visible region to empty
649        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
650            const bool translucent = !layer->isOpaque();
651            const Rect bounds(layer->visibleBounds());
652            visibleRegion.set(bounds);
653            visibleRegion.andSelf(screenRegion);
654            if (!visibleRegion.isEmpty()) {
655                // Remove the transparent area from the visible region
656                if (translucent) {
657                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
658                }
659
660                // compute the opaque region
661                const int32_t layerOrientation = layer->getOrientation();
662                if (s.alpha==255 && !translucent &&
663                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
664                    // the opaque region is the layer's footprint
665                    opaqueRegion = visibleRegion;
666                }
667            }
668        }
669
670        // Clip the covered region to the visible region
671        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
672
673        // Update aboveCoveredLayers for next (lower) layer
674        aboveCoveredLayers.orSelf(visibleRegion);
675
676        // subtract the opaque region covered by the layers above us
677        visibleRegion.subtractSelf(aboveOpaqueLayers);
678
679        // compute this layer's dirty region
680        if (layer->contentDirty) {
681            // we need to invalidate the whole region
682            dirty = visibleRegion;
683            // as well, as the old visible region
684            dirty.orSelf(layer->visibleRegionScreen);
685            layer->contentDirty = false;
686        } else {
687            /* compute the exposed region:
688             *   the exposed region consists of two components:
689             *   1) what's VISIBLE now and was COVERED before
690             *   2) what's EXPOSED now less what was EXPOSED before
691             *
692             * note that (1) is conservative, we start with the whole
693             * visible region but only keep what used to be covered by
694             * something -- which mean it may have been exposed.
695             *
696             * (2) handles areas that were not covered by anything but got
697             * exposed because of a resize.
698             */
699            const Region newExposed = visibleRegion - coveredRegion;
700            const Region oldVisibleRegion = layer->visibleRegionScreen;
701            const Region oldCoveredRegion = layer->coveredRegionScreen;
702            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
703            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
704        }
705        dirty.subtractSelf(aboveOpaqueLayers);
706
707        // accumulate to the screen dirty region
708        dirtyRegion.orSelf(dirty);
709
710        // Update aboveOpaqueLayers for next (lower) layer
711        aboveOpaqueLayers.orSelf(opaqueRegion);
712
713        // Store the visible region is screen space
714        layer->setVisibleRegion(visibleRegion);
715        layer->setCoveredRegion(coveredRegion);
716
717        // If a secure layer is partially visible, lock-down the screen!
718        if (layer->isSecure() && !visibleRegion.isEmpty()) {
719            secureFrameBuffer = true;
720        }
721    }
722
723    // invalidate the areas where a layer was removed
724    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
725    mDirtyRegionRemovedLayer.clear();
726
727    mSecureFrameBuffer = secureFrameBuffer;
728    opaqueRegion = aboveOpaqueLayers;
729}
730
731
732void SurfaceFlinger::commitTransaction()
733{
734    if (!mLayersPendingRemoval.isEmpty()) {
735        // Notify removed layers now that they can't be drawn from
736        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
737            mLayersPendingRemoval[i]->onRemoved();
738        }
739        mLayersPendingRemoval.clear();
740    }
741
742    mDrawingState = mCurrentState;
743    mTransationPending = false;
744    mTransactionCV.broadcast();
745}
746
747void SurfaceFlinger::handlePageFlip()
748{
749    ATRACE_CALL();
750    const DisplayHardware& hw = graphicPlane(0).displayHardware();
751    const Region screenRegion(hw.bounds());
752
753    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
754    const bool visibleRegions = lockPageFlip(currentLayers);
755
756        if (visibleRegions || mVisibleRegionsDirty) {
757            Region opaqueRegion;
758            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
759
760            /*
761             *  rebuild the visible layer list
762             */
763            const size_t count = currentLayers.size();
764            mVisibleLayersSortedByZ.clear();
765            mVisibleLayersSortedByZ.setCapacity(count);
766            for (size_t i=0 ; i<count ; i++) {
767                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
768                    mVisibleLayersSortedByZ.add(currentLayers[i]);
769            }
770
771            mWormholeRegion = screenRegion.subtract(opaqueRegion);
772            mVisibleRegionsDirty = false;
773            invalidateHwcGeometry();
774        }
775
776    unlockPageFlip(currentLayers);
777
778    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
779    mDirtyRegion.andSelf(screenRegion);
780}
781
782void SurfaceFlinger::invalidateHwcGeometry()
783{
784    mHwWorkListDirty = true;
785}
786
787bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
788{
789    bool recomputeVisibleRegions = false;
790    size_t count = currentLayers.size();
791    sp<LayerBase> const* layers = currentLayers.array();
792    for (size_t i=0 ; i<count ; i++) {
793        const sp<LayerBase>& layer(layers[i]);
794        layer->lockPageFlip(recomputeVisibleRegions);
795    }
796    return recomputeVisibleRegions;
797}
798
799void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
800{
801    const GraphicPlane& plane(graphicPlane(0));
802    const Transform& planeTransform(plane.transform());
803    const size_t count = currentLayers.size();
804    sp<LayerBase> const* layers = currentLayers.array();
805    for (size_t i=0 ; i<count ; i++) {
806        const sp<LayerBase>& layer(layers[i]);
807        layer->unlockPageFlip(planeTransform, mDirtyRegion);
808    }
809}
810
811void SurfaceFlinger::handleRefresh()
812{
813    bool needInvalidate = false;
814    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
815    const size_t count = currentLayers.size();
816    for (size_t i=0 ; i<count ; i++) {
817        const sp<LayerBase>& layer(currentLayers[i]);
818        if (layer->onPreComposition()) {
819            needInvalidate = true;
820        }
821    }
822    if (needInvalidate) {
823        signalLayerUpdate();
824    }
825}
826
827
828void SurfaceFlinger::handleWorkList()
829{
830    mHwWorkListDirty = false;
831    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
832    if (hwc.initCheck() == NO_ERROR) {
833        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
834        const size_t count = currentLayers.size();
835        hwc.createWorkList(count);
836        hwc_layer_t* const cur(hwc.getLayers());
837        for (size_t i=0 ; cur && i<count ; i++) {
838            currentLayers[i]->setGeometry(&cur[i]);
839            if (mDebugDisableHWC || mDebugRegion) {
840                cur[i].compositionType = HWC_FRAMEBUFFER;
841                cur[i].flags |= HWC_SKIP_LAYER;
842            }
843        }
844    }
845}
846
847void SurfaceFlinger::handleRepaint()
848{
849    ATRACE_CALL();
850
851    // compute the invalid region
852    mSwapRegion.orSelf(mDirtyRegion);
853
854    if (CC_UNLIKELY(mDebugRegion)) {
855        debugFlashRegions();
856    }
857
858    // set the frame buffer
859    const DisplayHardware& hw(graphicPlane(0).displayHardware());
860    glMatrixMode(GL_MODELVIEW);
861    glLoadIdentity();
862
863    uint32_t flags = hw.getFlags();
864    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
865        (flags & DisplayHardware::BUFFER_PRESERVED))
866    {
867        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
868        // takes a rectangle, we must make sure to update that whole
869        // rectangle in that case
870        if (flags & DisplayHardware::SWAP_RECTANGLE) {
871            // TODO: we really should be able to pass a region to
872            // SWAP_RECTANGLE so that we don't have to redraw all this.
873            mDirtyRegion.set(mSwapRegion.bounds());
874        } else {
875            // in the BUFFER_PRESERVED case, obviously, we can update only
876            // what's needed and nothing more.
877            // NOTE: this is NOT a common case, as preserving the backbuffer
878            // is costly and usually involves copying the whole update back.
879        }
880    } else {
881        if (flags & DisplayHardware::PARTIAL_UPDATES) {
882            // We need to redraw the rectangle that will be updated
883            // (pushed to the framebuffer).
884            // This is needed because PARTIAL_UPDATES only takes one
885            // rectangle instead of a region (see DisplayHardware::flip())
886            mDirtyRegion.set(mSwapRegion.bounds());
887        } else {
888            // we need to redraw everything (the whole screen)
889            mDirtyRegion.set(hw.bounds());
890            mSwapRegion = mDirtyRegion;
891        }
892    }
893
894    setupHardwareComposer(mDirtyRegion);
895    composeSurfaces(mDirtyRegion);
896
897    // update the swap region and clear the dirty region
898    mSwapRegion.orSelf(mDirtyRegion);
899    mDirtyRegion.clear();
900}
901
902void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
903{
904    const DisplayHardware& hw(graphicPlane(0).displayHardware());
905    HWComposer& hwc(hw.getHwComposer());
906    hwc_layer_t* const cur(hwc.getLayers());
907    if (!cur) {
908        return;
909    }
910
911    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
912    size_t count = layers.size();
913
914    ALOGE_IF(hwc.getNumLayers() != count,
915            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
916            hwc.getNumLayers(), count);
917
918    // just to be extra-safe, use the smallest count
919    if (hwc.initCheck() == NO_ERROR) {
920        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
921    }
922
923    /*
924     *  update the per-frame h/w composer data for each layer
925     *  and build the transparent region of the FB
926     */
927    for (size_t i=0 ; i<count ; i++) {
928        const sp<LayerBase>& layer(layers[i]);
929        layer->setPerFrameData(&cur[i]);
930    }
931    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
932    status_t err = hwc.prepare();
933    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
934
935    if (err == NO_ERROR) {
936        // what's happening here is tricky.
937        // we want to clear all the layers with the CLEAR_FB flags
938        // that are opaque.
939        // however, since some GPU are efficient at preserving
940        // the backbuffer, we want to take advantage of that so we do the
941        // clear only in the dirty region (other areas will be preserved
942        // on those GPUs).
943        //   NOTE: on non backbuffer preserving GPU, the dirty region
944        //   has already been expanded as needed, so the code is correct
945        //   there too.
946        //
947        // However, the content of the framebuffer cannot be trusted when
948        // we switch to/from FB/OVERLAY, in which case we need to
949        // expand the dirty region to those areas too.
950        //
951        // Note also that there is a special case when switching from
952        // "no layers in FB" to "some layers in FB", where we need to redraw
953        // the entire FB, since some areas might contain uninitialized
954        // data.
955        //
956        // Also we want to make sure to not clear areas that belong to
957        // layers above that won't redraw (we would just be erasing them),
958        // that is, we can't erase anything outside the dirty region.
959
960        Region transparent;
961
962        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
963            transparent.set(hw.getBounds());
964            dirtyInOut = transparent;
965        } else {
966            for (size_t i=0 ; i<count ; i++) {
967                const sp<LayerBase>& layer(layers[i]);
968                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
969                    transparent.orSelf(layer->visibleRegionScreen);
970                }
971                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
972                if (isOverlay != layer->isOverlay()) {
973                    // we transitioned to/from overlay, so add this layer
974                    // to the dirty region so the framebuffer can be either
975                    // cleared or redrawn.
976                    dirtyInOut.orSelf(layer->visibleRegionScreen);
977                }
978                layer->setOverlay(isOverlay);
979            }
980            // don't erase stuff outside the dirty region
981            transparent.andSelf(dirtyInOut);
982        }
983
984        /*
985         *  clear the area of the FB that need to be transparent
986         */
987        if (!transparent.isEmpty()) {
988            glClearColor(0,0,0,0);
989            Region::const_iterator it = transparent.begin();
990            Region::const_iterator const end = transparent.end();
991            const int32_t height = hw.getHeight();
992            while (it != end) {
993                const Rect& r(*it++);
994                const GLint sy = height - (r.top + r.height());
995                glScissor(r.left, sy, r.width(), r.height());
996                glClear(GL_COLOR_BUFFER_BIT);
997            }
998        }
999    }
1000}
1001
1002void SurfaceFlinger::composeSurfaces(const Region& dirty)
1003{
1004    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1005    HWComposer& hwc(hw.getHwComposer());
1006
1007    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
1008    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
1009        // should never happen unless the window manager has a bug
1010        // draw something...
1011        drawWormhole();
1012    }
1013
1014    // FIXME: workaroud for b/6020860
1015    glEnable(GL_SCISSOR_TEST);
1016    glScissor(0,0,0,0);
1017    glClear(GL_COLOR_BUFFER_BIT);
1018    // end-workaround
1019
1020    /*
1021     * and then, render the layers targeted at the framebuffer
1022     */
1023    hwc_layer_t* const cur(hwc.getLayers());
1024    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1025    size_t count = layers.size();
1026    for (size_t i=0 ; i<count ; i++) {
1027        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1028            continue;
1029        }
1030        const sp<LayerBase>& layer(layers[i]);
1031        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1032        if (!clip.isEmpty()) {
1033            layer->draw(clip);
1034        }
1035    }
1036}
1037
1038void SurfaceFlinger::debugFlashRegions()
1039{
1040    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1041    const uint32_t flags = hw.getFlags();
1042    const int32_t height = hw.getHeight();
1043    if (mSwapRegion.isEmpty()) {
1044        return;
1045    }
1046
1047    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1048            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1049        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1050                mDirtyRegion.bounds() : hw.bounds());
1051        composeSurfaces(repaint);
1052    }
1053
1054    glDisable(GL_TEXTURE_EXTERNAL_OES);
1055    glDisable(GL_TEXTURE_2D);
1056    glDisable(GL_BLEND);
1057    glDisable(GL_SCISSOR_TEST);
1058
1059    static int toggle = 0;
1060    toggle = 1 - toggle;
1061    if (toggle) {
1062        glColor4f(1, 0, 1, 1);
1063    } else {
1064        glColor4f(1, 1, 0, 1);
1065    }
1066
1067    Region::const_iterator it = mDirtyRegion.begin();
1068    Region::const_iterator const end = mDirtyRegion.end();
1069    while (it != end) {
1070        const Rect& r = *it++;
1071        GLfloat vertices[][2] = {
1072                { r.left,  height - r.top },
1073                { r.left,  height - r.bottom },
1074                { r.right, height - r.bottom },
1075                { r.right, height - r.top }
1076        };
1077        glVertexPointer(2, GL_FLOAT, 0, vertices);
1078        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1079    }
1080
1081    hw.flip(mSwapRegion);
1082
1083    if (mDebugRegion > 1)
1084        usleep(mDebugRegion * 1000);
1085
1086    glEnable(GL_SCISSOR_TEST);
1087}
1088
1089void SurfaceFlinger::drawWormhole() const
1090{
1091    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1092    if (region.isEmpty())
1093        return;
1094
1095    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1096    const int32_t width = hw.getWidth();
1097    const int32_t height = hw.getHeight();
1098
1099    if (CC_LIKELY(!mDebugBackground)) {
1100        glClearColor(0,0,0,0);
1101        Region::const_iterator it = region.begin();
1102        Region::const_iterator const end = region.end();
1103        while (it != end) {
1104            const Rect& r = *it++;
1105            const GLint sy = height - (r.top + r.height());
1106            glScissor(r.left, sy, r.width(), r.height());
1107            glClear(GL_COLOR_BUFFER_BIT);
1108        }
1109    } else {
1110        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1111                { width, height }, { 0, height }  };
1112        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1113
1114        glVertexPointer(2, GL_SHORT, 0, vertices);
1115        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1116        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1117
1118        glDisable(GL_TEXTURE_EXTERNAL_OES);
1119        glEnable(GL_TEXTURE_2D);
1120        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1121        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1122        glMatrixMode(GL_TEXTURE);
1123        glLoadIdentity();
1124
1125        glDisable(GL_BLEND);
1126
1127        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1128        Region::const_iterator it = region.begin();
1129        Region::const_iterator const end = region.end();
1130        while (it != end) {
1131            const Rect& r = *it++;
1132            const GLint sy = height - (r.top + r.height());
1133            glScissor(r.left, sy, r.width(), r.height());
1134            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1135        }
1136        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1137        glDisable(GL_TEXTURE_2D);
1138        glLoadIdentity();
1139        glMatrixMode(GL_MODELVIEW);
1140    }
1141}
1142
1143status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1144{
1145    Mutex::Autolock _l(mStateLock);
1146    addLayer_l(layer);
1147    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1148    return NO_ERROR;
1149}
1150
1151status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1152{
1153    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1154    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1155}
1156
1157ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1158        const sp<LayerBaseClient>& lbc)
1159{
1160    // attach this layer to the client
1161    size_t name = client->attachLayer(lbc);
1162
1163    Mutex::Autolock _l(mStateLock);
1164
1165    // add this layer to the current state list
1166    addLayer_l(lbc);
1167
1168    return ssize_t(name);
1169}
1170
1171status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1172{
1173    Mutex::Autolock _l(mStateLock);
1174    status_t err = purgatorizeLayer_l(layer);
1175    if (err == NO_ERROR)
1176        setTransactionFlags(eTransactionNeeded);
1177    return err;
1178}
1179
1180status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1181{
1182    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1183    if (lbc != 0) {
1184        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1185    }
1186    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1187    if (index >= 0) {
1188        mLayersRemoved = true;
1189        return NO_ERROR;
1190    }
1191    return status_t(index);
1192}
1193
1194status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1195{
1196    // First add the layer to the purgatory list, which makes sure it won't
1197    // go away, then remove it from the main list (through a transaction).
1198    ssize_t err = removeLayer_l(layerBase);
1199    if (err >= 0) {
1200        mLayerPurgatory.add(layerBase);
1201    }
1202
1203    mLayersPendingRemoval.push(layerBase);
1204
1205    // it's possible that we don't find a layer, because it might
1206    // have been destroyed already -- this is not technically an error
1207    // from the user because there is a race between Client::destroySurface(),
1208    // ~Client() and ~ISurface().
1209    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1210}
1211
1212status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1213{
1214    layer->forceVisibilityTransaction();
1215    setTransactionFlags(eTraversalNeeded);
1216    return NO_ERROR;
1217}
1218
1219uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1220{
1221    return android_atomic_release_load(&mTransactionFlags);
1222}
1223
1224uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1225{
1226    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1227}
1228
1229uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1230{
1231    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1232    if ((old & flags)==0) { // wake the server up
1233        signalTransaction();
1234    }
1235    return old;
1236}
1237
1238
1239void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1240        int orientation, uint32_t flags) {
1241    Mutex::Autolock _l(mStateLock);
1242
1243    uint32_t transactionFlags = 0;
1244    if (mCurrentState.orientation != orientation) {
1245        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1246            mCurrentState.orientation = orientation;
1247            transactionFlags |= eTransactionNeeded;
1248        } else if (orientation != eOrientationUnchanged) {
1249            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1250                    orientation);
1251        }
1252    }
1253
1254    const size_t count = state.size();
1255    for (size_t i=0 ; i<count ; i++) {
1256        const ComposerState& s(state[i]);
1257        sp<Client> client( static_cast<Client *>(s.client.get()) );
1258        transactionFlags |= setClientStateLocked(client, s.state);
1259    }
1260
1261    if (transactionFlags) {
1262        // this triggers the transaction
1263        setTransactionFlags(transactionFlags);
1264
1265        // if this is a synchronous transaction, wait for it to take effect
1266        // before returning.
1267        if (flags & eSynchronous) {
1268            mTransationPending = true;
1269        }
1270        while (mTransationPending) {
1271            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1272            if (CC_UNLIKELY(err != NO_ERROR)) {
1273                // just in case something goes wrong in SF, return to the
1274                // called after a few seconds.
1275                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1276                mTransationPending = false;
1277                break;
1278            }
1279        }
1280    }
1281}
1282
1283sp<ISurface> SurfaceFlinger::createSurface(
1284        ISurfaceComposerClient::surface_data_t* params,
1285        const String8& name,
1286        const sp<Client>& client,
1287        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1288        uint32_t flags)
1289{
1290    sp<LayerBaseClient> layer;
1291    sp<ISurface> surfaceHandle;
1292
1293    if (int32_t(w|h) < 0) {
1294        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1295                int(w), int(h));
1296        return surfaceHandle;
1297    }
1298
1299    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1300    sp<Layer> normalLayer;
1301    switch (flags & eFXSurfaceMask) {
1302        case eFXSurfaceNormal:
1303            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1304            layer = normalLayer;
1305            break;
1306        case eFXSurfaceBlur:
1307            // for now we treat Blur as Dim, until we can implement it
1308            // efficiently.
1309        case eFXSurfaceDim:
1310            layer = createDimSurface(client, d, w, h, flags);
1311            break;
1312        case eFXSurfaceScreenshot:
1313            layer = createScreenshotSurface(client, d, w, h, flags);
1314            break;
1315    }
1316
1317    if (layer != 0) {
1318        layer->initStates(w, h, flags);
1319        layer->setName(name);
1320        ssize_t token = addClientLayer(client, layer);
1321
1322        surfaceHandle = layer->getSurface();
1323        if (surfaceHandle != 0) {
1324            params->token = token;
1325            params->identity = layer->getIdentity();
1326            if (normalLayer != 0) {
1327                Mutex::Autolock _l(mStateLock);
1328                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1329            }
1330        }
1331
1332        setTransactionFlags(eTransactionNeeded);
1333    }
1334
1335    return surfaceHandle;
1336}
1337
1338sp<Layer> SurfaceFlinger::createNormalSurface(
1339        const sp<Client>& client, DisplayID display,
1340        uint32_t w, uint32_t h, uint32_t flags,
1341        PixelFormat& format)
1342{
1343    // initialize the surfaces
1344    switch (format) { // TODO: take h/w into account
1345    case PIXEL_FORMAT_TRANSPARENT:
1346    case PIXEL_FORMAT_TRANSLUCENT:
1347        format = PIXEL_FORMAT_RGBA_8888;
1348        break;
1349    case PIXEL_FORMAT_OPAQUE:
1350#ifdef NO_RGBX_8888
1351        format = PIXEL_FORMAT_RGB_565;
1352#else
1353        format = PIXEL_FORMAT_RGBX_8888;
1354#endif
1355        break;
1356    }
1357
1358#ifdef NO_RGBX_8888
1359    if (format == PIXEL_FORMAT_RGBX_8888)
1360        format = PIXEL_FORMAT_RGBA_8888;
1361#endif
1362
1363    sp<Layer> layer = new Layer(this, display, client);
1364    status_t err = layer->setBuffers(w, h, format, flags);
1365    if (CC_LIKELY(err != NO_ERROR)) {
1366        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1367        layer.clear();
1368    }
1369    return layer;
1370}
1371
1372sp<LayerDim> SurfaceFlinger::createDimSurface(
1373        const sp<Client>& client, DisplayID display,
1374        uint32_t w, uint32_t h, uint32_t flags)
1375{
1376    sp<LayerDim> layer = new LayerDim(this, display, client);
1377    return layer;
1378}
1379
1380sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1381        const sp<Client>& client, DisplayID display,
1382        uint32_t w, uint32_t h, uint32_t flags)
1383{
1384    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1385    return layer;
1386}
1387
1388status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1389{
1390    /*
1391     * called by the window manager, when a surface should be marked for
1392     * destruction.
1393     *
1394     * The surface is removed from the current and drawing lists, but placed
1395     * in the purgatory queue, so it's not destroyed right-away (we need
1396     * to wait for all client's references to go away first).
1397     */
1398
1399    status_t err = NAME_NOT_FOUND;
1400    Mutex::Autolock _l(mStateLock);
1401    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1402    if (layer != 0) {
1403        err = purgatorizeLayer_l(layer);
1404        if (err == NO_ERROR) {
1405            setTransactionFlags(eTransactionNeeded);
1406        }
1407    }
1408    return err;
1409}
1410
1411status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1412{
1413    // called by ~ISurface() when all references are gone
1414    status_t err = NO_ERROR;
1415    sp<LayerBaseClient> l(layer.promote());
1416    if (l != NULL) {
1417        Mutex::Autolock _l(mStateLock);
1418        err = removeLayer_l(l);
1419        if (err == NAME_NOT_FOUND) {
1420            // The surface wasn't in the current list, which means it was
1421            // removed already, which means it is in the purgatory,
1422            // and need to be removed from there.
1423            ssize_t idx = mLayerPurgatory.remove(l);
1424            ALOGE_IF(idx < 0,
1425                    "layer=%p is not in the purgatory list", l.get());
1426        }
1427        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1428                "error removing layer=%p (%s)", l.get(), strerror(-err));
1429    }
1430    return err;
1431}
1432
1433uint32_t SurfaceFlinger::setClientStateLocked(
1434        const sp<Client>& client,
1435        const layer_state_t& s)
1436{
1437    uint32_t flags = 0;
1438    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1439    if (layer != 0) {
1440        const uint32_t what = s.what;
1441        if (what & ePositionChanged) {
1442            if (layer->setPosition(s.x, s.y))
1443                flags |= eTraversalNeeded;
1444        }
1445        if (what & eLayerChanged) {
1446            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1447            if (layer->setLayer(s.z)) {
1448                mCurrentState.layersSortedByZ.removeAt(idx);
1449                mCurrentState.layersSortedByZ.add(layer);
1450                // we need traversal (state changed)
1451                // AND transaction (list changed)
1452                flags |= eTransactionNeeded|eTraversalNeeded;
1453            }
1454        }
1455        if (what & eSizeChanged) {
1456            if (layer->setSize(s.w, s.h)) {
1457                flags |= eTraversalNeeded;
1458            }
1459        }
1460        if (what & eAlphaChanged) {
1461            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1462                flags |= eTraversalNeeded;
1463        }
1464        if (what & eMatrixChanged) {
1465            if (layer->setMatrix(s.matrix))
1466                flags |= eTraversalNeeded;
1467        }
1468        if (what & eTransparentRegionChanged) {
1469            if (layer->setTransparentRegionHint(s.transparentRegion))
1470                flags |= eTraversalNeeded;
1471        }
1472        if (what & eVisibilityChanged) {
1473            if (layer->setFlags(s.flags, s.mask))
1474                flags |= eTraversalNeeded;
1475        }
1476    }
1477    return flags;
1478}
1479
1480void SurfaceFlinger::screenReleased(int dpy)
1481{
1482    // this may be called by a signal handler, we can't do too much in here
1483    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1484    signalTransaction();
1485}
1486
1487void SurfaceFlinger::screenAcquired(int dpy)
1488{
1489    // this may be called by a signal handler, we can't do too much in here
1490    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1491    signalTransaction();
1492}
1493
1494status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1495{
1496    const size_t SIZE = 4096;
1497    char buffer[SIZE];
1498    String8 result;
1499
1500    if (!PermissionCache::checkCallingPermission(sDump)) {
1501        snprintf(buffer, SIZE, "Permission Denial: "
1502                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1503                IPCThreadState::self()->getCallingPid(),
1504                IPCThreadState::self()->getCallingUid());
1505        result.append(buffer);
1506    } else {
1507        // Try to get the main lock, but don't insist if we can't
1508        // (this would indicate SF is stuck, but we want to be able to
1509        // print something in dumpsys).
1510        int retry = 3;
1511        while (mStateLock.tryLock()<0 && --retry>=0) {
1512            usleep(1000000);
1513        }
1514        const bool locked(retry >= 0);
1515        if (!locked) {
1516            snprintf(buffer, SIZE,
1517                    "SurfaceFlinger appears to be unresponsive, "
1518                    "dumping anyways (no locks held)\n");
1519            result.append(buffer);
1520        }
1521
1522        bool dumpAll = true;
1523        size_t index = 0;
1524        size_t numArgs = args.size();
1525        if (numArgs) {
1526            if ((index < numArgs) &&
1527                    (args[index] == String16("--list"))) {
1528                index++;
1529                listLayersLocked(args, index, result, buffer, SIZE);
1530                dumpAll = false;
1531            }
1532
1533            if ((index < numArgs) &&
1534                    (args[index] == String16("--latency"))) {
1535                index++;
1536                dumpStatsLocked(args, index, result, buffer, SIZE);
1537                dumpAll = false;
1538            }
1539
1540            if ((index < numArgs) &&
1541                    (args[index] == String16("--latency-clear"))) {
1542                index++;
1543                clearStatsLocked(args, index, result, buffer, SIZE);
1544                dumpAll = false;
1545            }
1546        }
1547
1548        if (dumpAll) {
1549            dumpAllLocked(result, buffer, SIZE);
1550        }
1551
1552        if (locked) {
1553            mStateLock.unlock();
1554        }
1555    }
1556    write(fd, result.string(), result.size());
1557    return NO_ERROR;
1558}
1559
1560void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1561        String8& result, char* buffer, size_t SIZE) const
1562{
1563    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1564    const size_t count = currentLayers.size();
1565    for (size_t i=0 ; i<count ; i++) {
1566        const sp<LayerBase>& layer(currentLayers[i]);
1567        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1568        result.append(buffer);
1569    }
1570}
1571
1572void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1573        String8& result, char* buffer, size_t SIZE) const
1574{
1575    String8 name;
1576    if (index < args.size()) {
1577        name = String8(args[index]);
1578        index++;
1579    }
1580
1581    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1582    const size_t count = currentLayers.size();
1583    for (size_t i=0 ; i<count ; i++) {
1584        const sp<LayerBase>& layer(currentLayers[i]);
1585        if (name.isEmpty()) {
1586            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1587            result.append(buffer);
1588        }
1589        if (name.isEmpty() || (name == layer->getName())) {
1590            layer->dumpStats(result, buffer, SIZE);
1591        }
1592    }
1593}
1594
1595void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1596        String8& result, char* buffer, size_t SIZE) const
1597{
1598    String8 name;
1599    if (index < args.size()) {
1600        name = String8(args[index]);
1601        index++;
1602    }
1603
1604    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1605    const size_t count = currentLayers.size();
1606    for (size_t i=0 ; i<count ; i++) {
1607        const sp<LayerBase>& layer(currentLayers[i]);
1608        if (name.isEmpty() || (name == layer->getName())) {
1609            layer->clearStats();
1610        }
1611    }
1612}
1613
1614void SurfaceFlinger::dumpAllLocked(
1615        String8& result, char* buffer, size_t SIZE) const
1616{
1617    // figure out if we're stuck somewhere
1618    const nsecs_t now = systemTime();
1619    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1620    const nsecs_t inTransaction(mDebugInTransaction);
1621    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1622    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1623
1624    /*
1625     * Dump the visible layer list
1626     */
1627    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1628    const size_t count = currentLayers.size();
1629    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1630    result.append(buffer);
1631    for (size_t i=0 ; i<count ; i++) {
1632        const sp<LayerBase>& layer(currentLayers[i]);
1633        layer->dump(result, buffer, SIZE);
1634    }
1635
1636    /*
1637     * Dump the layers in the purgatory
1638     */
1639
1640    const size_t purgatorySize = mLayerPurgatory.size();
1641    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1642    result.append(buffer);
1643    for (size_t i=0 ; i<purgatorySize ; i++) {
1644        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1645        layer->shortDump(result, buffer, SIZE);
1646    }
1647
1648    /*
1649     * Dump SurfaceFlinger global state
1650     */
1651
1652    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1653    result.append(buffer);
1654
1655    const GLExtensions& extensions(GLExtensions::getInstance());
1656    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1657            extensions.getVendor(),
1658            extensions.getRenderer(),
1659            extensions.getVersion());
1660    result.append(buffer);
1661
1662    snprintf(buffer, SIZE, "EGL : %s\n",
1663            eglQueryString(graphicPlane(0).getEGLDisplay(),
1664                    EGL_VERSION_HW_ANDROID));
1665    result.append(buffer);
1666
1667    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1668    result.append(buffer);
1669
1670    mWormholeRegion.dump(result, "WormholeRegion");
1671    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1672    snprintf(buffer, SIZE,
1673            "  orientation=%d, canDraw=%d\n",
1674            mCurrentState.orientation, hw.canDraw());
1675    result.append(buffer);
1676    snprintf(buffer, SIZE,
1677            "  last eglSwapBuffers() time: %f us\n"
1678            "  last transaction time     : %f us\n"
1679            "  transaction-flags         : %08x\n"
1680            "  refresh-rate              : %f fps\n"
1681            "  x-dpi                     : %f\n"
1682            "  y-dpi                     : %f\n",
1683            mLastSwapBufferTime/1000.0,
1684            mLastTransactionTime/1000.0,
1685            mTransactionFlags,
1686            hw.getRefreshRate(),
1687            hw.getDpiX(),
1688            hw.getDpiY());
1689    result.append(buffer);
1690
1691    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1692            inSwapBuffersDuration/1000.0);
1693    result.append(buffer);
1694
1695    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1696            inTransactionDuration/1000.0);
1697    result.append(buffer);
1698
1699    /*
1700     * VSYNC state
1701     */
1702    mEventThread->dump(result, buffer, SIZE);
1703
1704    /*
1705     * Dump HWComposer state
1706     */
1707    HWComposer& hwc(hw.getHwComposer());
1708    snprintf(buffer, SIZE, "h/w composer state:\n");
1709    result.append(buffer);
1710    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1711            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1712                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1713    result.append(buffer);
1714    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1715
1716    /*
1717     * Dump gralloc state
1718     */
1719    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1720    alloc.dump(result);
1721    hw.dump(result);
1722}
1723
1724status_t SurfaceFlinger::onTransact(
1725    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1726{
1727    switch (code) {
1728        case CREATE_CONNECTION:
1729        case SET_TRANSACTION_STATE:
1730        case SET_ORIENTATION:
1731        case BOOT_FINISHED:
1732        case TURN_ELECTRON_BEAM_OFF:
1733        case TURN_ELECTRON_BEAM_ON:
1734        {
1735            // codes that require permission check
1736            IPCThreadState* ipc = IPCThreadState::self();
1737            const int pid = ipc->getCallingPid();
1738            const int uid = ipc->getCallingUid();
1739            if ((uid != AID_GRAPHICS) &&
1740                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1741                ALOGE("Permission Denial: "
1742                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1743                return PERMISSION_DENIED;
1744            }
1745            break;
1746        }
1747        case CAPTURE_SCREEN:
1748        {
1749            // codes that require permission check
1750            IPCThreadState* ipc = IPCThreadState::self();
1751            const int pid = ipc->getCallingPid();
1752            const int uid = ipc->getCallingUid();
1753            if ((uid != AID_GRAPHICS) &&
1754                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1755                ALOGE("Permission Denial: "
1756                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1757                return PERMISSION_DENIED;
1758            }
1759            break;
1760        }
1761    }
1762
1763    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1764    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1765        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1766        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1767            IPCThreadState* ipc = IPCThreadState::self();
1768            const int pid = ipc->getCallingPid();
1769            const int uid = ipc->getCallingUid();
1770            ALOGE("Permission Denial: "
1771                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1772            return PERMISSION_DENIED;
1773        }
1774        int n;
1775        switch (code) {
1776            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1777            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1778                return NO_ERROR;
1779            case 1002:  // SHOW_UPDATES
1780                n = data.readInt32();
1781                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1782                invalidateHwcGeometry();
1783                repaintEverything();
1784                return NO_ERROR;
1785            case 1003:  // SHOW_BACKGROUND
1786                n = data.readInt32();
1787                mDebugBackground = n ? 1 : 0;
1788                return NO_ERROR;
1789            case 1004:{ // repaint everything
1790                repaintEverything();
1791                return NO_ERROR;
1792            }
1793            case 1005:{ // force transaction
1794                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1795                return NO_ERROR;
1796            }
1797            case 1006:{ // send empty update
1798                signalRefresh();
1799                return NO_ERROR;
1800            }
1801            case 1008:  // toggle use of hw composer
1802                n = data.readInt32();
1803                mDebugDisableHWC = n ? 1 : 0;
1804                invalidateHwcGeometry();
1805                repaintEverything();
1806                return NO_ERROR;
1807            case 1009:  // toggle use of transform hint
1808                n = data.readInt32();
1809                mDebugDisableTransformHint = n ? 1 : 0;
1810                invalidateHwcGeometry();
1811                repaintEverything();
1812                return NO_ERROR;
1813            case 1010:  // interrogate.
1814                reply->writeInt32(0);
1815                reply->writeInt32(0);
1816                reply->writeInt32(mDebugRegion);
1817                reply->writeInt32(mDebugBackground);
1818                reply->writeInt32(mDebugDisableHWC);
1819                return NO_ERROR;
1820            case 1013: {
1821                Mutex::Autolock _l(mStateLock);
1822                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1823                reply->writeInt32(hw.getPageFlipCount());
1824            }
1825            return NO_ERROR;
1826        }
1827    }
1828    return err;
1829}
1830
1831void SurfaceFlinger::repaintEverything() {
1832    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1833    const Rect bounds(hw.getBounds());
1834    setInvalidateRegion(Region(bounds));
1835    signalTransaction();
1836}
1837
1838void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1839    Mutex::Autolock _l(mInvalidateLock);
1840    mInvalidateRegion = reg;
1841}
1842
1843Region SurfaceFlinger::getAndClearInvalidateRegion() {
1844    Mutex::Autolock _l(mInvalidateLock);
1845    Region reg(mInvalidateRegion);
1846    mInvalidateRegion.clear();
1847    return reg;
1848}
1849
1850// ---------------------------------------------------------------------------
1851
1852status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1853        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1854{
1855    Mutex::Autolock _l(mStateLock);
1856    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1857}
1858
1859status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1860        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1861{
1862    if (!GLExtensions::getInstance().haveFramebufferObject())
1863        return INVALID_OPERATION;
1864
1865    // get screen geometry
1866    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1867    const uint32_t hw_w = hw.getWidth();
1868    const uint32_t hw_h = hw.getHeight();
1869    GLfloat u = 1;
1870    GLfloat v = 1;
1871
1872    // make sure to clear all GL error flags
1873    while ( glGetError() != GL_NO_ERROR ) ;
1874
1875    // create a FBO
1876    GLuint name, tname;
1877    glGenTextures(1, &tname);
1878    glBindTexture(GL_TEXTURE_2D, tname);
1879    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1880            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1881    if (glGetError() != GL_NO_ERROR) {
1882        while ( glGetError() != GL_NO_ERROR ) ;
1883        GLint tw = (2 << (31 - clz(hw_w)));
1884        GLint th = (2 << (31 - clz(hw_h)));
1885        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1886                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1887        u = GLfloat(hw_w) / tw;
1888        v = GLfloat(hw_h) / th;
1889    }
1890    glGenFramebuffersOES(1, &name);
1891    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1892    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1893            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1894
1895    // redraw the screen entirely...
1896    glDisable(GL_TEXTURE_EXTERNAL_OES);
1897    glDisable(GL_TEXTURE_2D);
1898    glDisable(GL_SCISSOR_TEST);
1899    glClearColor(0,0,0,1);
1900    glClear(GL_COLOR_BUFFER_BIT);
1901    glEnable(GL_SCISSOR_TEST);
1902    glMatrixMode(GL_MODELVIEW);
1903    glLoadIdentity();
1904    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1905    const size_t count = layers.size();
1906    for (size_t i=0 ; i<count ; ++i) {
1907        const sp<LayerBase>& layer(layers[i]);
1908        layer->drawForSreenShot();
1909    }
1910
1911    hw.compositionComplete();
1912
1913    // back to main framebuffer
1914    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1915    glDisable(GL_SCISSOR_TEST);
1916    glDeleteFramebuffersOES(1, &name);
1917
1918    *textureName = tname;
1919    *uOut = u;
1920    *vOut = v;
1921    return NO_ERROR;
1922}
1923
1924// ---------------------------------------------------------------------------
1925
1926status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1927{
1928    // get screen geometry
1929    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1930    const uint32_t hw_w = hw.getWidth();
1931    const uint32_t hw_h = hw.getHeight();
1932    const Region screenBounds(hw.getBounds());
1933
1934    GLfloat u, v;
1935    GLuint tname;
1936    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1937    if (result != NO_ERROR) {
1938        return result;
1939    }
1940
1941    GLfloat vtx[8];
1942    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1943    glBindTexture(GL_TEXTURE_2D, tname);
1944    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1945    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1946    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1947    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1948    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1949    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1950    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1951    glVertexPointer(2, GL_FLOAT, 0, vtx);
1952
1953    /*
1954     * Texture coordinate mapping
1955     *
1956     *                 u
1957     *    1 +----------+---+
1958     *      |     |    |   |  image is inverted
1959     *      |     V    |   |  w.r.t. the texture
1960     *  1-v +----------+   |  coordinates
1961     *      |              |
1962     *      |              |
1963     *      |              |
1964     *    0 +--------------+
1965     *      0              1
1966     *
1967     */
1968
1969    class s_curve_interpolator {
1970        const float nbFrames, s, v;
1971    public:
1972        s_curve_interpolator(int nbFrames, float s)
1973        : nbFrames(1.0f / (nbFrames-1)), s(s),
1974          v(1.0f + expf(-s + 0.5f*s)) {
1975        }
1976        float operator()(int f) {
1977            const float x = f * nbFrames;
1978            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1979        }
1980    };
1981
1982    class v_stretch {
1983        const GLfloat hw_w, hw_h;
1984    public:
1985        v_stretch(uint32_t hw_w, uint32_t hw_h)
1986        : hw_w(hw_w), hw_h(hw_h) {
1987        }
1988        void operator()(GLfloat* vtx, float v) {
1989            const GLfloat w = hw_w + (hw_w * v);
1990            const GLfloat h = hw_h - (hw_h * v);
1991            const GLfloat x = (hw_w - w) * 0.5f;
1992            const GLfloat y = (hw_h - h) * 0.5f;
1993            vtx[0] = x;         vtx[1] = y;
1994            vtx[2] = x;         vtx[3] = y + h;
1995            vtx[4] = x + w;     vtx[5] = y + h;
1996            vtx[6] = x + w;     vtx[7] = y;
1997        }
1998    };
1999
2000    class h_stretch {
2001        const GLfloat hw_w, hw_h;
2002    public:
2003        h_stretch(uint32_t hw_w, uint32_t hw_h)
2004        : hw_w(hw_w), hw_h(hw_h) {
2005        }
2006        void operator()(GLfloat* vtx, float v) {
2007            const GLfloat w = hw_w - (hw_w * v);
2008            const GLfloat h = 1.0f;
2009            const GLfloat x = (hw_w - w) * 0.5f;
2010            const GLfloat y = (hw_h - h) * 0.5f;
2011            vtx[0] = x;         vtx[1] = y;
2012            vtx[2] = x;         vtx[3] = y + h;
2013            vtx[4] = x + w;     vtx[5] = y + h;
2014            vtx[6] = x + w;     vtx[7] = y;
2015        }
2016    };
2017
2018    // the full animation is 24 frames
2019    char value[PROPERTY_VALUE_MAX];
2020    property_get("debug.sf.electron_frames", value, "24");
2021    int nbFrames = (atoi(value) + 1) >> 1;
2022    if (nbFrames <= 0) // just in case
2023        nbFrames = 24;
2024
2025    s_curve_interpolator itr(nbFrames, 7.5f);
2026    s_curve_interpolator itg(nbFrames, 8.0f);
2027    s_curve_interpolator itb(nbFrames, 8.5f);
2028
2029    v_stretch vverts(hw_w, hw_h);
2030
2031    glMatrixMode(GL_TEXTURE);
2032    glLoadIdentity();
2033    glMatrixMode(GL_MODELVIEW);
2034    glLoadIdentity();
2035
2036    glEnable(GL_BLEND);
2037    glBlendFunc(GL_ONE, GL_ONE);
2038    for (int i=0 ; i<nbFrames ; i++) {
2039        float x, y, w, h;
2040        const float vr = itr(i);
2041        const float vg = itg(i);
2042        const float vb = itb(i);
2043
2044        // clear screen
2045        glColorMask(1,1,1,1);
2046        glClear(GL_COLOR_BUFFER_BIT);
2047        glEnable(GL_TEXTURE_2D);
2048
2049        // draw the red plane
2050        vverts(vtx, vr);
2051        glColorMask(1,0,0,1);
2052        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2053
2054        // draw the green plane
2055        vverts(vtx, vg);
2056        glColorMask(0,1,0,1);
2057        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2058
2059        // draw the blue plane
2060        vverts(vtx, vb);
2061        glColorMask(0,0,1,1);
2062        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2063
2064        // draw the white highlight (we use the last vertices)
2065        glDisable(GL_TEXTURE_2D);
2066        glColorMask(1,1,1,1);
2067        glColor4f(vg, vg, vg, 1);
2068        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2069        hw.flip(screenBounds);
2070    }
2071
2072    h_stretch hverts(hw_w, hw_h);
2073    glDisable(GL_BLEND);
2074    glDisable(GL_TEXTURE_2D);
2075    glColorMask(1,1,1,1);
2076    for (int i=0 ; i<nbFrames ; i++) {
2077        const float v = itg(i);
2078        hverts(vtx, v);
2079        glClear(GL_COLOR_BUFFER_BIT);
2080        glColor4f(1-v, 1-v, 1-v, 1);
2081        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2082        hw.flip(screenBounds);
2083    }
2084
2085    glColorMask(1,1,1,1);
2086    glEnable(GL_SCISSOR_TEST);
2087    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2088    glDeleteTextures(1, &tname);
2089    glDisable(GL_TEXTURE_2D);
2090    glDisable(GL_BLEND);
2091    return NO_ERROR;
2092}
2093
2094status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2095{
2096    status_t result = PERMISSION_DENIED;
2097
2098    if (!GLExtensions::getInstance().haveFramebufferObject())
2099        return INVALID_OPERATION;
2100
2101
2102    // get screen geometry
2103    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2104    const uint32_t hw_w = hw.getWidth();
2105    const uint32_t hw_h = hw.getHeight();
2106    const Region screenBounds(hw.bounds());
2107
2108    GLfloat u, v;
2109    GLuint tname;
2110    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2111    if (result != NO_ERROR) {
2112        return result;
2113    }
2114
2115    GLfloat vtx[8];
2116    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2117    glBindTexture(GL_TEXTURE_2D, tname);
2118    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2119    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2120    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2121    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2122    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2123    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2124    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2125    glVertexPointer(2, GL_FLOAT, 0, vtx);
2126
2127    class s_curve_interpolator {
2128        const float nbFrames, s, v;
2129    public:
2130        s_curve_interpolator(int nbFrames, float s)
2131        : nbFrames(1.0f / (nbFrames-1)), s(s),
2132          v(1.0f + expf(-s + 0.5f*s)) {
2133        }
2134        float operator()(int f) {
2135            const float x = f * nbFrames;
2136            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2137        }
2138    };
2139
2140    class v_stretch {
2141        const GLfloat hw_w, hw_h;
2142    public:
2143        v_stretch(uint32_t hw_w, uint32_t hw_h)
2144        : hw_w(hw_w), hw_h(hw_h) {
2145        }
2146        void operator()(GLfloat* vtx, float v) {
2147            const GLfloat w = hw_w + (hw_w * v);
2148            const GLfloat h = hw_h - (hw_h * v);
2149            const GLfloat x = (hw_w - w) * 0.5f;
2150            const GLfloat y = (hw_h - h) * 0.5f;
2151            vtx[0] = x;         vtx[1] = y;
2152            vtx[2] = x;         vtx[3] = y + h;
2153            vtx[4] = x + w;     vtx[5] = y + h;
2154            vtx[6] = x + w;     vtx[7] = y;
2155        }
2156    };
2157
2158    class h_stretch {
2159        const GLfloat hw_w, hw_h;
2160    public:
2161        h_stretch(uint32_t hw_w, uint32_t hw_h)
2162        : hw_w(hw_w), hw_h(hw_h) {
2163        }
2164        void operator()(GLfloat* vtx, float v) {
2165            const GLfloat w = hw_w - (hw_w * v);
2166            const GLfloat h = 1.0f;
2167            const GLfloat x = (hw_w - w) * 0.5f;
2168            const GLfloat y = (hw_h - h) * 0.5f;
2169            vtx[0] = x;         vtx[1] = y;
2170            vtx[2] = x;         vtx[3] = y + h;
2171            vtx[4] = x + w;     vtx[5] = y + h;
2172            vtx[6] = x + w;     vtx[7] = y;
2173        }
2174    };
2175
2176    // the full animation is 12 frames
2177    int nbFrames = 8;
2178    s_curve_interpolator itr(nbFrames, 7.5f);
2179    s_curve_interpolator itg(nbFrames, 8.0f);
2180    s_curve_interpolator itb(nbFrames, 8.5f);
2181
2182    h_stretch hverts(hw_w, hw_h);
2183    glDisable(GL_BLEND);
2184    glDisable(GL_TEXTURE_2D);
2185    glColorMask(1,1,1,1);
2186    for (int i=nbFrames-1 ; i>=0 ; i--) {
2187        const float v = itg(i);
2188        hverts(vtx, v);
2189        glClear(GL_COLOR_BUFFER_BIT);
2190        glColor4f(1-v, 1-v, 1-v, 1);
2191        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2192        hw.flip(screenBounds);
2193    }
2194
2195    nbFrames = 4;
2196    v_stretch vverts(hw_w, hw_h);
2197    glEnable(GL_BLEND);
2198    glBlendFunc(GL_ONE, GL_ONE);
2199    for (int i=nbFrames-1 ; i>=0 ; i--) {
2200        float x, y, w, h;
2201        const float vr = itr(i);
2202        const float vg = itg(i);
2203        const float vb = itb(i);
2204
2205        // clear screen
2206        glColorMask(1,1,1,1);
2207        glClear(GL_COLOR_BUFFER_BIT);
2208        glEnable(GL_TEXTURE_2D);
2209
2210        // draw the red plane
2211        vverts(vtx, vr);
2212        glColorMask(1,0,0,1);
2213        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2214
2215        // draw the green plane
2216        vverts(vtx, vg);
2217        glColorMask(0,1,0,1);
2218        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2219
2220        // draw the blue plane
2221        vverts(vtx, vb);
2222        glColorMask(0,0,1,1);
2223        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2224
2225        hw.flip(screenBounds);
2226    }
2227
2228    glColorMask(1,1,1,1);
2229    glEnable(GL_SCISSOR_TEST);
2230    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2231    glDeleteTextures(1, &tname);
2232    glDisable(GL_TEXTURE_2D);
2233    glDisable(GL_BLEND);
2234
2235    return NO_ERROR;
2236}
2237
2238// ---------------------------------------------------------------------------
2239
2240status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2241{
2242    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2243    if (!hw.canDraw()) {
2244        // we're already off
2245        return NO_ERROR;
2246    }
2247
2248    // turn off hwc while we're doing the animation
2249    hw.getHwComposer().disable();
2250    // and make sure to turn it back on (if needed) next time we compose
2251    invalidateHwcGeometry();
2252
2253    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2254        electronBeamOffAnimationImplLocked();
2255    }
2256
2257    // always clear the whole screen at the end of the animation
2258    glClearColor(0,0,0,1);
2259    glDisable(GL_SCISSOR_TEST);
2260    glClear(GL_COLOR_BUFFER_BIT);
2261    glEnable(GL_SCISSOR_TEST);
2262    hw.flip( Region(hw.bounds()) );
2263
2264    return NO_ERROR;
2265}
2266
2267status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2268{
2269    class MessageTurnElectronBeamOff : public MessageBase {
2270        SurfaceFlinger* flinger;
2271        int32_t mode;
2272        status_t result;
2273    public:
2274        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2275            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2276        }
2277        status_t getResult() const {
2278            return result;
2279        }
2280        virtual bool handler() {
2281            Mutex::Autolock _l(flinger->mStateLock);
2282            result = flinger->turnElectronBeamOffImplLocked(mode);
2283            return true;
2284        }
2285    };
2286
2287    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2288    status_t res = postMessageSync(msg);
2289    if (res == NO_ERROR) {
2290        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2291
2292        // work-around: when the power-manager calls us we activate the
2293        // animation. eventually, the "on" animation will be called
2294        // by the power-manager itself
2295        mElectronBeamAnimationMode = mode;
2296    }
2297    return res;
2298}
2299
2300// ---------------------------------------------------------------------------
2301
2302status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2303{
2304    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2305    if (hw.canDraw()) {
2306        // we're already on
2307        return NO_ERROR;
2308    }
2309    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2310        electronBeamOnAnimationImplLocked();
2311    }
2312
2313    // make sure to redraw the whole screen when the animation is done
2314    mDirtyRegion.set(hw.bounds());
2315    signalTransaction();
2316
2317    return NO_ERROR;
2318}
2319
2320status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2321{
2322    class MessageTurnElectronBeamOn : public MessageBase {
2323        SurfaceFlinger* flinger;
2324        int32_t mode;
2325        status_t result;
2326    public:
2327        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2328            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2329        }
2330        status_t getResult() const {
2331            return result;
2332        }
2333        virtual bool handler() {
2334            Mutex::Autolock _l(flinger->mStateLock);
2335            result = flinger->turnElectronBeamOnImplLocked(mode);
2336            return true;
2337        }
2338    };
2339
2340    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2341    return NO_ERROR;
2342}
2343
2344// ---------------------------------------------------------------------------
2345
2346status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2347        sp<IMemoryHeap>* heap,
2348        uint32_t* w, uint32_t* h, PixelFormat* f,
2349        uint32_t sw, uint32_t sh,
2350        uint32_t minLayerZ, uint32_t maxLayerZ)
2351{
2352    ATRACE_CALL();
2353
2354    status_t result = PERMISSION_DENIED;
2355
2356    // only one display supported for now
2357    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2358        return BAD_VALUE;
2359
2360    if (!GLExtensions::getInstance().haveFramebufferObject())
2361        return INVALID_OPERATION;
2362
2363    // get screen geometry
2364    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2365    const uint32_t hw_w = hw.getWidth();
2366    const uint32_t hw_h = hw.getHeight();
2367
2368    if ((sw > hw_w) || (sh > hw_h))
2369        return BAD_VALUE;
2370
2371    sw = (!sw) ? hw_w : sw;
2372    sh = (!sh) ? hw_h : sh;
2373    const size_t size = sw * sh * 4;
2374
2375    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2376    //        sw, sh, minLayerZ, maxLayerZ);
2377
2378    // make sure to clear all GL error flags
2379    while ( glGetError() != GL_NO_ERROR ) ;
2380
2381    // create a FBO
2382    GLuint name, tname;
2383    glGenRenderbuffersOES(1, &tname);
2384    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2385    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2386
2387    glGenFramebuffersOES(1, &name);
2388    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2389    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2390            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2391
2392    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2393
2394    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2395
2396        // invert everything, b/c glReadPixel() below will invert the FB
2397        glViewport(0, 0, sw, sh);
2398        glScissor(0, 0, sw, sh);
2399        glEnable(GL_SCISSOR_TEST);
2400        glMatrixMode(GL_PROJECTION);
2401        glPushMatrix();
2402        glLoadIdentity();
2403        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2404        glMatrixMode(GL_MODELVIEW);
2405
2406        // redraw the screen entirely...
2407        glClearColor(0,0,0,1);
2408        glClear(GL_COLOR_BUFFER_BIT);
2409
2410        const LayerVector& layers(mDrawingState.layersSortedByZ);
2411        const size_t count = layers.size();
2412        for (size_t i=0 ; i<count ; ++i) {
2413            const sp<LayerBase>& layer(layers[i]);
2414            const uint32_t flags = layer->drawingState().flags;
2415            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2416                const uint32_t z = layer->drawingState().z;
2417                if (z >= minLayerZ && z <= maxLayerZ) {
2418                    layer->drawForSreenShot();
2419                }
2420            }
2421        }
2422
2423        // XXX: this is needed on tegra
2424        glEnable(GL_SCISSOR_TEST);
2425        glScissor(0, 0, sw, sh);
2426
2427        // check for errors and return screen capture
2428        if (glGetError() != GL_NO_ERROR) {
2429            // error while rendering
2430            result = INVALID_OPERATION;
2431        } else {
2432            // allocate shared memory large enough to hold the
2433            // screen capture
2434            sp<MemoryHeapBase> base(
2435                    new MemoryHeapBase(size, 0, "screen-capture") );
2436            void* const ptr = base->getBase();
2437            if (ptr) {
2438                // capture the screen with glReadPixels()
2439                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2440                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2441                if (glGetError() == GL_NO_ERROR) {
2442                    *heap = base;
2443                    *w = sw;
2444                    *h = sh;
2445                    *f = PIXEL_FORMAT_RGBA_8888;
2446                    result = NO_ERROR;
2447                }
2448            } else {
2449                result = NO_MEMORY;
2450            }
2451        }
2452        glEnable(GL_SCISSOR_TEST);
2453        glViewport(0, 0, hw_w, hw_h);
2454        glMatrixMode(GL_PROJECTION);
2455        glPopMatrix();
2456        glMatrixMode(GL_MODELVIEW);
2457    } else {
2458        result = BAD_VALUE;
2459    }
2460
2461    // release FBO resources
2462    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2463    glDeleteRenderbuffersOES(1, &tname);
2464    glDeleteFramebuffersOES(1, &name);
2465
2466    hw.compositionComplete();
2467
2468    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2469
2470    return result;
2471}
2472
2473
2474status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2475        sp<IMemoryHeap>* heap,
2476        uint32_t* width, uint32_t* height, PixelFormat* format,
2477        uint32_t sw, uint32_t sh,
2478        uint32_t minLayerZ, uint32_t maxLayerZ)
2479{
2480    // only one display supported for now
2481    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2482        return BAD_VALUE;
2483
2484    if (!GLExtensions::getInstance().haveFramebufferObject())
2485        return INVALID_OPERATION;
2486
2487    class MessageCaptureScreen : public MessageBase {
2488        SurfaceFlinger* flinger;
2489        DisplayID dpy;
2490        sp<IMemoryHeap>* heap;
2491        uint32_t* w;
2492        uint32_t* h;
2493        PixelFormat* f;
2494        uint32_t sw;
2495        uint32_t sh;
2496        uint32_t minLayerZ;
2497        uint32_t maxLayerZ;
2498        status_t result;
2499    public:
2500        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2501                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2502                uint32_t sw, uint32_t sh,
2503                uint32_t minLayerZ, uint32_t maxLayerZ)
2504            : flinger(flinger), dpy(dpy),
2505              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2506              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2507              result(PERMISSION_DENIED)
2508        {
2509        }
2510        status_t getResult() const {
2511            return result;
2512        }
2513        virtual bool handler() {
2514            Mutex::Autolock _l(flinger->mStateLock);
2515
2516            // if we have secure windows, never allow the screen capture
2517            if (flinger->mSecureFrameBuffer)
2518                return true;
2519
2520            result = flinger->captureScreenImplLocked(dpy,
2521                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2522
2523            return true;
2524        }
2525    };
2526
2527    sp<MessageBase> msg = new MessageCaptureScreen(this,
2528            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2529    status_t res = postMessageSync(msg);
2530    if (res == NO_ERROR) {
2531        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2532    }
2533    return res;
2534}
2535
2536// ---------------------------------------------------------------------------
2537
2538sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2539{
2540    sp<Layer> result;
2541    Mutex::Autolock _l(mStateLock);
2542    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2543    return result;
2544}
2545
2546// ---------------------------------------------------------------------------
2547
2548Client::Client(const sp<SurfaceFlinger>& flinger)
2549    : mFlinger(flinger), mNameGenerator(1)
2550{
2551}
2552
2553Client::~Client()
2554{
2555    const size_t count = mLayers.size();
2556    for (size_t i=0 ; i<count ; i++) {
2557        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2558        if (layer != 0) {
2559            mFlinger->removeLayer(layer);
2560        }
2561    }
2562}
2563
2564status_t Client::initCheck() const {
2565    return NO_ERROR;
2566}
2567
2568size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2569{
2570    Mutex::Autolock _l(mLock);
2571    size_t name = mNameGenerator++;
2572    mLayers.add(name, layer);
2573    return name;
2574}
2575
2576void Client::detachLayer(const LayerBaseClient* layer)
2577{
2578    Mutex::Autolock _l(mLock);
2579    // we do a linear search here, because this doesn't happen often
2580    const size_t count = mLayers.size();
2581    for (size_t i=0 ; i<count ; i++) {
2582        if (mLayers.valueAt(i) == layer) {
2583            mLayers.removeItemsAt(i, 1);
2584            break;
2585        }
2586    }
2587}
2588sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2589{
2590    Mutex::Autolock _l(mLock);
2591    sp<LayerBaseClient> lbc;
2592    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2593    if (layer != 0) {
2594        lbc = layer.promote();
2595        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2596    }
2597    return lbc;
2598}
2599
2600
2601status_t Client::onTransact(
2602    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2603{
2604    // these must be checked
2605     IPCThreadState* ipc = IPCThreadState::self();
2606     const int pid = ipc->getCallingPid();
2607     const int uid = ipc->getCallingUid();
2608     const int self_pid = getpid();
2609     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2610         // we're called from a different process, do the real check
2611         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2612         {
2613             ALOGE("Permission Denial: "
2614                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2615             return PERMISSION_DENIED;
2616         }
2617     }
2618     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2619}
2620
2621
2622sp<ISurface> Client::createSurface(
2623        ISurfaceComposerClient::surface_data_t* params,
2624        const String8& name,
2625        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2626        uint32_t flags)
2627{
2628    /*
2629     * createSurface must be called from the GL thread so that it can
2630     * have access to the GL context.
2631     */
2632
2633    class MessageCreateSurface : public MessageBase {
2634        sp<ISurface> result;
2635        SurfaceFlinger* flinger;
2636        ISurfaceComposerClient::surface_data_t* params;
2637        Client* client;
2638        const String8& name;
2639        DisplayID display;
2640        uint32_t w, h;
2641        PixelFormat format;
2642        uint32_t flags;
2643    public:
2644        MessageCreateSurface(SurfaceFlinger* flinger,
2645                ISurfaceComposerClient::surface_data_t* params,
2646                const String8& name, Client* client,
2647                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2648                uint32_t flags)
2649            : flinger(flinger), params(params), client(client), name(name),
2650              display(display), w(w), h(h), format(format), flags(flags)
2651        {
2652        }
2653        sp<ISurface> getResult() const { return result; }
2654        virtual bool handler() {
2655            result = flinger->createSurface(params, name, client,
2656                    display, w, h, format, flags);
2657            return true;
2658        }
2659    };
2660
2661    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2662            params, name, this, display, w, h, format, flags);
2663    mFlinger->postMessageSync(msg);
2664    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2665}
2666status_t Client::destroySurface(SurfaceID sid) {
2667    return mFlinger->removeSurface(this, sid);
2668}
2669
2670// ---------------------------------------------------------------------------
2671
2672GraphicBufferAlloc::GraphicBufferAlloc() {}
2673
2674GraphicBufferAlloc::~GraphicBufferAlloc() {}
2675
2676sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2677        PixelFormat format, uint32_t usage, status_t* error) {
2678    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2679    status_t err = graphicBuffer->initCheck();
2680    *error = err;
2681    if (err != 0 || graphicBuffer->handle == 0) {
2682        if (err == NO_MEMORY) {
2683            GraphicBuffer::dumpAllocationsToSystemLog();
2684        }
2685        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2686             "failed (%s), handle=%p",
2687                w, h, strerror(-err), graphicBuffer->handle);
2688        return 0;
2689    }
2690    return graphicBuffer;
2691}
2692
2693// ---------------------------------------------------------------------------
2694
2695GraphicPlane::GraphicPlane()
2696    : mHw(0)
2697{
2698}
2699
2700GraphicPlane::~GraphicPlane() {
2701    delete mHw;
2702}
2703
2704bool GraphicPlane::initialized() const {
2705    return mHw ? true : false;
2706}
2707
2708int GraphicPlane::getWidth() const {
2709    return mWidth;
2710}
2711
2712int GraphicPlane::getHeight() const {
2713    return mHeight;
2714}
2715
2716void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2717{
2718    mHw = hw;
2719
2720    // initialize the display orientation transform.
2721    // it's a constant that should come from the display driver.
2722    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2723    char property[PROPERTY_VALUE_MAX];
2724    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2725        //displayOrientation
2726        switch (atoi(property)) {
2727        case 90:
2728            displayOrientation = ISurfaceComposer::eOrientation90;
2729            break;
2730        case 270:
2731            displayOrientation = ISurfaceComposer::eOrientation270;
2732            break;
2733        }
2734    }
2735
2736    const float w = hw->getWidth();
2737    const float h = hw->getHeight();
2738    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2739            &mDisplayTransform);
2740    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2741        mDisplayWidth = h;
2742        mDisplayHeight = w;
2743    } else {
2744        mDisplayWidth = w;
2745        mDisplayHeight = h;
2746    }
2747
2748    setOrientation(ISurfaceComposer::eOrientationDefault);
2749}
2750
2751status_t GraphicPlane::orientationToTransfrom(
2752        int orientation, int w, int h, Transform* tr)
2753{
2754    uint32_t flags = 0;
2755    switch (orientation) {
2756    case ISurfaceComposer::eOrientationDefault:
2757        flags = Transform::ROT_0;
2758        break;
2759    case ISurfaceComposer::eOrientation90:
2760        flags = Transform::ROT_90;
2761        break;
2762    case ISurfaceComposer::eOrientation180:
2763        flags = Transform::ROT_180;
2764        break;
2765    case ISurfaceComposer::eOrientation270:
2766        flags = Transform::ROT_270;
2767        break;
2768    default:
2769        return BAD_VALUE;
2770    }
2771    tr->set(flags, w, h);
2772    return NO_ERROR;
2773}
2774
2775status_t GraphicPlane::setOrientation(int orientation)
2776{
2777    // If the rotation can be handled in hardware, this is where
2778    // the magic should happen.
2779
2780    const DisplayHardware& hw(displayHardware());
2781    const float w = mDisplayWidth;
2782    const float h = mDisplayHeight;
2783    mWidth = int(w);
2784    mHeight = int(h);
2785
2786    Transform orientationTransform;
2787    GraphicPlane::orientationToTransfrom(orientation, w, h,
2788            &orientationTransform);
2789    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2790        mWidth = int(h);
2791        mHeight = int(w);
2792    }
2793
2794    mOrientation = orientation;
2795    mGlobalTransform = mDisplayTransform * orientationTransform;
2796    return NO_ERROR;
2797}
2798
2799const DisplayHardware& GraphicPlane::displayHardware() const {
2800    return *mHw;
2801}
2802
2803DisplayHardware& GraphicPlane::editDisplayHardware() {
2804    return *mHw;
2805}
2806
2807const Transform& GraphicPlane::transform() const {
2808    return mGlobalTransform;
2809}
2810
2811EGLDisplay GraphicPlane::getEGLDisplay() const {
2812    return mHw->getEGLDisplay();
2813}
2814
2815// ---------------------------------------------------------------------------
2816
2817}; // namespace android
2818