SurfaceFlinger.cpp revision 1bbafb96101de04c43adb5e3ca2494070d20a46a 
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#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35
36#include <utils/String8.h>
37#include <utils/String16.h>
38#include <utils/StopWatch.h>
39
40#include <ui/GraphicBufferAllocator.h>
41#include <ui/GraphicLog.h>
42#include <ui/PixelFormat.h>
43
44#include <pixelflinger/pixelflinger.h>
45#include <GLES/gl.h>
46
47#include "clz.h"
48#include "GLExtensions.h"
49#include "Layer.h"
50#include "LayerDim.h"
51#include "SurfaceFlinger.h"
52
53#include "DisplayHardware/DisplayHardware.h"
54#include "DisplayHardware/HWComposer.h"
55
56/* ideally AID_GRAPHICS would be in a semi-public header
57 * or there would be a way to map a user/group name to its id
58 */
59#ifndef AID_GRAPHICS
60#define AID_GRAPHICS 1003
61#endif
62
63#define DISPLAY_COUNT       1
64
65namespace android {
66// ---------------------------------------------------------------------------
67
68SurfaceFlinger::SurfaceFlinger()
69    :   BnSurfaceComposer(), Thread(false),
70        mTransactionFlags(0),
71        mTransactionCount(0),
72        mResizeTransationPending(false),
73        mLayersRemoved(false),
74        mBootTime(systemTime()),
75        mHardwareTest("android.permission.HARDWARE_TEST"),
76        mAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER"),
77        mReadFramebuffer("android.permission.READ_FRAME_BUFFER"),
78        mDump("android.permission.DUMP"),
79        mVisibleRegionsDirty(false),
80        mHwWorkListDirty(false),
81        mDeferReleaseConsole(false),
82        mFreezeDisplay(false),
83        mElectronBeamAnimationMode(0),
84        mFreezeCount(0),
85        mFreezeDisplayTime(0),
86        mDebugRegion(0),
87        mDebugBackground(0),
88        mDebugDisableHWC(0),
89        mDebugInSwapBuffers(0),
90        mLastSwapBufferTime(0),
91        mDebugInTransaction(0),
92        mLastTransactionTime(0),
93        mBootFinished(false),
94        mConsoleSignals(0),
95        mSecureFrameBuffer(0)
96{
97    init();
98}
99
100void SurfaceFlinger::init()
101{
102    LOGI("SurfaceFlinger is starting");
103
104    // debugging stuff...
105    char value[PROPERTY_VALUE_MAX];
106    property_get("debug.sf.showupdates", value, "0");
107    mDebugRegion = atoi(value);
108    property_get("debug.sf.showbackground", value, "0");
109    mDebugBackground = atoi(value);
110
111    LOGI_IF(mDebugRegion,       "showupdates enabled");
112    LOGI_IF(mDebugBackground,   "showbackground enabled");
113}
114
115SurfaceFlinger::~SurfaceFlinger()
116{
117    glDeleteTextures(1, &mWormholeTexName);
118}
119
120sp<IMemoryHeap> SurfaceFlinger::getCblk() const
121{
122    return mServerHeap;
123}
124
125sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
126{
127    sp<ISurfaceComposerClient> bclient;
128    sp<Client> client(new Client(this));
129    status_t err = client->initCheck();
130    if (err == NO_ERROR) {
131        bclient = client;
132    }
133    return bclient;
134}
135
136sp<ISurfaceComposerClient> SurfaceFlinger::createClientConnection()
137{
138    sp<ISurfaceComposerClient> bclient;
139    sp<UserClient> client(new UserClient(this));
140    status_t err = client->initCheck();
141    if (err == NO_ERROR) {
142        bclient = client;
143    }
144    return bclient;
145}
146
147sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
148{
149    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
150    return gba;
151}
152
153const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
154{
155    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
156    const GraphicPlane& plane(mGraphicPlanes[dpy]);
157    return plane;
158}
159
160GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
161{
162    return const_cast<GraphicPlane&>(
163        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
164}
165
166void SurfaceFlinger::bootFinished()
167{
168    const nsecs_t now = systemTime();
169    const nsecs_t duration = now - mBootTime;
170    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
171    mBootFinished = true;
172    property_set("ctl.stop", "bootanim");
173}
174
175void SurfaceFlinger::onFirstRef()
176{
177    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
178
179    // Wait for the main thread to be done with its initialization
180    mReadyToRunBarrier.wait();
181}
182
183static inline uint16_t pack565(int r, int g, int b) {
184    return (r<<11)|(g<<5)|b;
185}
186
187status_t SurfaceFlinger::readyToRun()
188{
189    LOGI(   "SurfaceFlinger's main thread ready to run. "
190            "Initializing graphics H/W...");
191
192    // we only support one display currently
193    int dpy = 0;
194
195    {
196        // initialize the main display
197        GraphicPlane& plane(graphicPlane(dpy));
198        DisplayHardware* const hw = new DisplayHardware(this, dpy);
199        plane.setDisplayHardware(hw);
200    }
201
202    // create the shared control-block
203    mServerHeap = new MemoryHeapBase(4096,
204            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
205    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
206
207    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
208    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
209
210    new(mServerCblk) surface_flinger_cblk_t;
211
212    // initialize primary screen
213    // (other display should be initialized in the same manner, but
214    // asynchronously, as they could come and go. None of this is supported
215    // yet).
216    const GraphicPlane& plane(graphicPlane(dpy));
217    const DisplayHardware& hw = plane.displayHardware();
218    const uint32_t w = hw.getWidth();
219    const uint32_t h = hw.getHeight();
220    const uint32_t f = hw.getFormat();
221    hw.makeCurrent();
222
223    // initialize the shared control block
224    mServerCblk->connected |= 1<<dpy;
225    display_cblk_t* dcblk = mServerCblk->displays + dpy;
226    memset(dcblk, 0, sizeof(display_cblk_t));
227    dcblk->w            = plane.getWidth();
228    dcblk->h            = plane.getHeight();
229    dcblk->format       = f;
230    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
231    dcblk->xdpi         = hw.getDpiX();
232    dcblk->ydpi         = hw.getDpiY();
233    dcblk->fps          = hw.getRefreshRate();
234    dcblk->density      = hw.getDensity();
235
236    // Initialize OpenGL|ES
237    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
238    glPixelStorei(GL_PACK_ALIGNMENT, 4);
239    glEnableClientState(GL_VERTEX_ARRAY);
240    glEnable(GL_SCISSOR_TEST);
241    glShadeModel(GL_FLAT);
242    glDisable(GL_DITHER);
243    glDisable(GL_CULL_FACE);
244
245    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
246    const uint16_t g1 = pack565(0x17,0x2f,0x17);
247    const uint16_t textureData[4] = { g0, g1, g1, g0 };
248    glGenTextures(1, &mWormholeTexName);
249    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
250    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
251    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
252    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
253    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
254    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
255            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
256
257    glViewport(0, 0, w, h);
258    glMatrixMode(GL_PROJECTION);
259    glLoadIdentity();
260    glOrthof(0, w, h, 0, 0, 1);
261
262    mReadyToRunBarrier.open();
263
264    /*
265     *  We're now ready to accept clients...
266     */
267
268    // start boot animation
269    property_set("ctl.start", "bootanim");
270
271    return NO_ERROR;
272}
273
274// ----------------------------------------------------------------------------
275#if 0
276#pragma mark -
277#pragma mark Events Handler
278#endif
279
280void SurfaceFlinger::waitForEvent()
281{
282    while (true) {
283        nsecs_t timeout = -1;
284        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
285        if (UNLIKELY(isFrozen())) {
286            // wait 5 seconds
287            const nsecs_t now = systemTime();
288            if (mFreezeDisplayTime == 0) {
289                mFreezeDisplayTime = now;
290            }
291            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
292            timeout = waitTime>0 ? waitTime : 0;
293        }
294
295        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
296
297        // see if we timed out
298        if (isFrozen()) {
299            const nsecs_t now = systemTime();
300            nsecs_t frozenTime = (now - mFreezeDisplayTime);
301            if (frozenTime >= freezeDisplayTimeout) {
302                // we timed out and are still frozen
303                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
304                        mFreezeDisplay, mFreezeCount);
305                mFreezeDisplayTime = 0;
306                mFreezeCount = 0;
307                mFreezeDisplay = false;
308            }
309        }
310
311        if (msg != 0) {
312            switch (msg->what) {
313                case MessageQueue::INVALIDATE:
314                    // invalidate message, just return to the main loop
315                    return;
316            }
317        }
318    }
319}
320
321void SurfaceFlinger::signalEvent() {
322    mEventQueue.invalidate();
323}
324
325void SurfaceFlinger::signal() const {
326    // this is the IPC call
327    const_cast<SurfaceFlinger*>(this)->signalEvent();
328}
329
330bool SurfaceFlinger::authenticateSurface(const sp<ISurface>& surface) const {
331    Mutex::Autolock _l(mStateLock);
332    sp<IBinder> surfBinder(surface->asBinder());
333
334    // Check the visible layer list for the ISurface
335    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
336    size_t count = currentLayers.size();
337    for (size_t i=0 ; i<count ; i++) {
338        const sp<LayerBase>& layer(currentLayers[i]);
339        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
340        if (lbc != NULL && lbc->getSurfaceBinder() == surfBinder) {
341            return true;
342        }
343    }
344
345    // Check the layers in the purgatory.  This check is here so that if a
346    // Surface gets destroyed before all the clients are done using it, the
347    // error will not be reported as "surface XYZ is not authenticated", but
348    // will instead fail later on when the client tries to use the surface,
349    // which should be reported as "surface XYZ returned an -ENODEV".  The
350    // purgatorized layers are no less authentic than the visible ones, so this
351    // should not cause any harm.
352    size_t purgatorySize =  mLayerPurgatory.size();
353    for (size_t i=0 ; i<purgatorySize ; i++) {
354        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
355        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
356        if (lbc != NULL && lbc->getSurfaceBinder() == surfBinder) {
357            return true;
358        }
359    }
360
361    return false;
362}
363
364status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
365        nsecs_t reltime, uint32_t flags)
366{
367    return mEventQueue.postMessage(msg, reltime, flags);
368}
369
370status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
371        nsecs_t reltime, uint32_t flags)
372{
373    status_t res = mEventQueue.postMessage(msg, reltime, flags);
374    if (res == NO_ERROR) {
375        msg->wait();
376    }
377    return res;
378}
379
380// ----------------------------------------------------------------------------
381#if 0
382#pragma mark -
383#pragma mark Main loop
384#endif
385
386bool SurfaceFlinger::threadLoop()
387{
388    waitForEvent();
389
390    // check for transactions
391    if (UNLIKELY(mConsoleSignals)) {
392        handleConsoleEvents();
393    }
394
395    if (LIKELY(mTransactionCount == 0)) {
396        // if we're in a global transaction, don't do anything.
397        const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
398        uint32_t transactionFlags = getTransactionFlags(mask);
399        if (LIKELY(transactionFlags)) {
400            handleTransaction(transactionFlags);
401        }
402    }
403
404    // post surfaces (if needed)
405    handlePageFlip();
406
407    if (UNLIKELY(mHwWorkListDirty)) {
408        // build the h/w work list
409        handleWorkList();
410    }
411
412    const DisplayHardware& hw(graphicPlane(0).displayHardware());
413    if (LIKELY(hw.canDraw() && !isFrozen())) {
414        // repaint the framebuffer (if needed)
415
416        const int index = hw.getCurrentBufferIndex();
417        GraphicLog& logger(GraphicLog::getInstance());
418
419        logger.log(GraphicLog::SF_REPAINT, index);
420        handleRepaint();
421
422        // inform the h/w that we're done compositing
423        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
424        hw.compositionComplete();
425
426        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
427        postFramebuffer();
428
429        logger.log(GraphicLog::SF_REPAINT_DONE, index);
430    } else {
431        // pretend we did the post
432        hw.compositionComplete();
433        usleep(16667); // 60 fps period
434    }
435    return true;
436}
437
438void SurfaceFlinger::postFramebuffer()
439{
440    if (!mInvalidRegion.isEmpty()) {
441        const DisplayHardware& hw(graphicPlane(0).displayHardware());
442        const nsecs_t now = systemTime();
443        mDebugInSwapBuffers = now;
444        hw.flip(mInvalidRegion);
445        mLastSwapBufferTime = systemTime() - now;
446        mDebugInSwapBuffers = 0;
447        mInvalidRegion.clear();
448    }
449}
450
451void SurfaceFlinger::handleConsoleEvents()
452{
453    // something to do with the console
454    const DisplayHardware& hw = graphicPlane(0).displayHardware();
455
456    int what = android_atomic_and(0, &mConsoleSignals);
457    if (what & eConsoleAcquired) {
458        hw.acquireScreen();
459        // this is a temporary work-around, eventually this should be called
460        // by the power-manager
461        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
462    }
463
464    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
465        // We got the release signal before the acquire signal
466        mDeferReleaseConsole = false;
467        hw.releaseScreen();
468    }
469
470    if (what & eConsoleReleased) {
471        if (hw.isScreenAcquired()) {
472            hw.releaseScreen();
473        } else {
474            mDeferReleaseConsole = true;
475        }
476    }
477
478    mDirtyRegion.set(hw.bounds());
479}
480
481void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
482{
483    Vector< sp<LayerBase> > ditchedLayers;
484
485    /*
486     * Perform and commit the transaction
487     */
488
489    { // scope for the lock
490        Mutex::Autolock _l(mStateLock);
491        const nsecs_t now = systemTime();
492        mDebugInTransaction = now;
493        handleTransactionLocked(transactionFlags, ditchedLayers);
494        mLastTransactionTime = systemTime() - now;
495        mDebugInTransaction = 0;
496        invalidateHwcGeometry();
497        // here the transaction has been committed
498    }
499
500    /*
501     * Clean-up all layers that went away
502     * (do this without the lock held)
503     */
504
505    const size_t count = ditchedLayers.size();
506    for (size_t i=0 ; i<count ; i++) {
507        if (ditchedLayers[i] != 0) {
508            //LOGD("ditching layer %p", ditchedLayers[i].get());
509            ditchedLayers[i]->ditch();
510        }
511    }
512}
513
514void SurfaceFlinger::handleTransactionLocked(
515        uint32_t transactionFlags, Vector< sp<LayerBase> >& ditchedLayers)
516{
517    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
518    const size_t count = currentLayers.size();
519
520    /*
521     * Traversal of the children
522     * (perform the transaction for each of them if needed)
523     */
524
525    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
526    if (layersNeedTransaction) {
527        for (size_t i=0 ; i<count ; i++) {
528            const sp<LayerBase>& layer = currentLayers[i];
529            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
530            if (!trFlags) continue;
531
532            const uint32_t flags = layer->doTransaction(0);
533            if (flags & Layer::eVisibleRegion)
534                mVisibleRegionsDirty = true;
535        }
536    }
537
538    /*
539     * Perform our own transaction if needed
540     */
541
542    if (transactionFlags & eTransactionNeeded) {
543        if (mCurrentState.orientation != mDrawingState.orientation) {
544            // the orientation has changed, recompute all visible regions
545            // and invalidate everything.
546
547            const int dpy = 0;
548            const int orientation = mCurrentState.orientation;
549            const uint32_t type = mCurrentState.orientationType;
550            GraphicPlane& plane(graphicPlane(dpy));
551            plane.setOrientation(orientation);
552
553            // update the shared control block
554            const DisplayHardware& hw(plane.displayHardware());
555            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
556            dcblk->orientation = orientation;
557            dcblk->w = plane.getWidth();
558            dcblk->h = plane.getHeight();
559
560            mVisibleRegionsDirty = true;
561            mDirtyRegion.set(hw.bounds());
562        }
563
564        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
565            // freezing or unfreezing the display -> trigger animation if needed
566            mFreezeDisplay = mCurrentState.freezeDisplay;
567            if (mFreezeDisplay)
568                 mFreezeDisplayTime = 0;
569        }
570
571        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
572            // layers have been added
573            mVisibleRegionsDirty = true;
574        }
575
576        // some layers might have been removed, so
577        // we need to update the regions they're exposing.
578        if (mLayersRemoved) {
579            mLayersRemoved = false;
580            mVisibleRegionsDirty = true;
581            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
582            const size_t count = previousLayers.size();
583            for (size_t i=0 ; i<count ; i++) {
584                const sp<LayerBase>& layer(previousLayers[i]);
585                if (currentLayers.indexOf( layer ) < 0) {
586                    // this layer is not visible anymore
587                    ditchedLayers.add(layer);
588                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
589                }
590            }
591        }
592    }
593
594    commitTransaction();
595}
596
597sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
598{
599    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
600}
601
602void SurfaceFlinger::computeVisibleRegions(
603    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
604{
605    const GraphicPlane& plane(graphicPlane(0));
606    const Transform& planeTransform(plane.transform());
607    const DisplayHardware& hw(plane.displayHardware());
608    const Region screenRegion(hw.bounds());
609
610    Region aboveOpaqueLayers;
611    Region aboveCoveredLayers;
612    Region dirty;
613
614    bool secureFrameBuffer = false;
615
616    size_t i = currentLayers.size();
617    while (i--) {
618        const sp<LayerBase>& layer = currentLayers[i];
619        layer->validateVisibility(planeTransform);
620
621        // start with the whole surface at its current location
622        const Layer::State& s(layer->drawingState());
623
624        /*
625         * opaqueRegion: area of a surface that is fully opaque.
626         */
627        Region opaqueRegion;
628
629        /*
630         * visibleRegion: area of a surface that is visible on screen
631         * and not fully transparent. This is essentially the layer's
632         * footprint minus the opaque regions above it.
633         * Areas covered by a translucent surface are considered visible.
634         */
635        Region visibleRegion;
636
637        /*
638         * coveredRegion: area of a surface that is covered by all
639         * visible regions above it (which includes the translucent areas).
640         */
641        Region coveredRegion;
642
643
644        // handle hidden surfaces by setting the visible region to empty
645        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
646            const bool translucent = layer->needsBlending();
647            const Rect bounds(layer->visibleBounds());
648            visibleRegion.set(bounds);
649            visibleRegion.andSelf(screenRegion);
650            if (!visibleRegion.isEmpty()) {
651                // Remove the transparent area from the visible region
652                if (translucent) {
653                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
654                }
655
656                // compute the opaque region
657                const int32_t layerOrientation = layer->getOrientation();
658                if (s.alpha==255 && !translucent &&
659                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
660                    // the opaque region is the layer's footprint
661                    opaqueRegion = visibleRegion;
662                }
663            }
664        }
665
666        // Clip the covered region to the visible region
667        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
668
669        // Update aboveCoveredLayers for next (lower) layer
670        aboveCoveredLayers.orSelf(visibleRegion);
671
672        // subtract the opaque region covered by the layers above us
673        visibleRegion.subtractSelf(aboveOpaqueLayers);
674
675        // compute this layer's dirty region
676        if (layer->contentDirty) {
677            // we need to invalidate the whole region
678            dirty = visibleRegion;
679            // as well, as the old visible region
680            dirty.orSelf(layer->visibleRegionScreen);
681            layer->contentDirty = false;
682        } else {
683            /* compute the exposed region:
684             *   the exposed region consists of two components:
685             *   1) what's VISIBLE now and was COVERED before
686             *   2) what's EXPOSED now less what was EXPOSED before
687             *
688             * note that (1) is conservative, we start with the whole
689             * visible region but only keep what used to be covered by
690             * something -- which mean it may have been exposed.
691             *
692             * (2) handles areas that were not covered by anything but got
693             * exposed because of a resize.
694             */
695            const Region newExposed = visibleRegion - coveredRegion;
696            const Region oldVisibleRegion = layer->visibleRegionScreen;
697            const Region oldCoveredRegion = layer->coveredRegionScreen;
698            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
699            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
700        }
701        dirty.subtractSelf(aboveOpaqueLayers);
702
703        // accumulate to the screen dirty region
704        dirtyRegion.orSelf(dirty);
705
706        // Update aboveOpaqueLayers for next (lower) layer
707        aboveOpaqueLayers.orSelf(opaqueRegion);
708
709        // Store the visible region is screen space
710        layer->setVisibleRegion(visibleRegion);
711        layer->setCoveredRegion(coveredRegion);
712
713        // If a secure layer is partially visible, lock-down the screen!
714        if (layer->isSecure() && !visibleRegion.isEmpty()) {
715            secureFrameBuffer = true;
716        }
717    }
718
719    // invalidate the areas where a layer was removed
720    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
721    mDirtyRegionRemovedLayer.clear();
722
723    mSecureFrameBuffer = secureFrameBuffer;
724    opaqueRegion = aboveOpaqueLayers;
725}
726
727
728void SurfaceFlinger::commitTransaction()
729{
730    mDrawingState = mCurrentState;
731    mResizeTransationPending = false;
732    mTransactionCV.broadcast();
733}
734
735void SurfaceFlinger::handlePageFlip()
736{
737    bool visibleRegions = mVisibleRegionsDirty;
738    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
739    visibleRegions |= lockPageFlip(currentLayers);
740
741        const DisplayHardware& hw = graphicPlane(0).displayHardware();
742        const Region screenRegion(hw.bounds());
743        if (visibleRegions) {
744            Region opaqueRegion;
745            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
746
747            /*
748             *  rebuild the visible layer list
749             */
750            const size_t count = currentLayers.size();
751            mVisibleLayersSortedByZ.clear();
752            mVisibleLayersSortedByZ.setCapacity(count);
753            for (size_t i=0 ; i<count ; i++) {
754                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
755                    mVisibleLayersSortedByZ.add(currentLayers[i]);
756            }
757
758            mWormholeRegion = screenRegion.subtract(opaqueRegion);
759            mVisibleRegionsDirty = false;
760            invalidateHwcGeometry();
761        }
762
763    unlockPageFlip(currentLayers);
764    mDirtyRegion.andSelf(screenRegion);
765}
766
767void SurfaceFlinger::invalidateHwcGeometry()
768{
769    mHwWorkListDirty = true;
770}
771
772bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
773{
774    bool recomputeVisibleRegions = false;
775    size_t count = currentLayers.size();
776    sp<LayerBase> const* layers = currentLayers.array();
777    for (size_t i=0 ; i<count ; i++) {
778        const sp<LayerBase>& layer(layers[i]);
779        layer->lockPageFlip(recomputeVisibleRegions);
780    }
781    return recomputeVisibleRegions;
782}
783
784void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
785{
786    const GraphicPlane& plane(graphicPlane(0));
787    const Transform& planeTransform(plane.transform());
788    size_t count = currentLayers.size();
789    sp<LayerBase> const* layers = currentLayers.array();
790    for (size_t i=0 ; i<count ; i++) {
791        const sp<LayerBase>& layer(layers[i]);
792        layer->unlockPageFlip(planeTransform, mDirtyRegion);
793    }
794}
795
796void SurfaceFlinger::handleWorkList()
797{
798    mHwWorkListDirty = false;
799    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
800    if (hwc.initCheck() == NO_ERROR) {
801        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
802        const size_t count = currentLayers.size();
803        hwc.createWorkList(count);
804        hwc_layer_t* const cur(hwc.getLayers());
805        for (size_t i=0 ; cur && i<count ; i++) {
806            currentLayers[i]->setGeometry(&cur[i]);
807            if (mDebugDisableHWC) {
808                cur[i].compositionType = HWC_FRAMEBUFFER;
809                cur[i].flags |= HWC_SKIP_LAYER;
810            }
811        }
812    }
813}
814
815void SurfaceFlinger::handleRepaint()
816{
817    // compute the invalid region
818    mInvalidRegion.orSelf(mDirtyRegion);
819
820    if (UNLIKELY(mDebugRegion)) {
821        debugFlashRegions();
822    }
823
824    // set the frame buffer
825    const DisplayHardware& hw(graphicPlane(0).displayHardware());
826    glMatrixMode(GL_MODELVIEW);
827    glLoadIdentity();
828
829    uint32_t flags = hw.getFlags();
830    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
831        (flags & DisplayHardware::BUFFER_PRESERVED))
832    {
833        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
834        // takes a rectangle, we must make sure to update that whole
835        // rectangle in that case
836        if (flags & DisplayHardware::SWAP_RECTANGLE) {
837            // TODO: we really should be able to pass a region to
838            // SWAP_RECTANGLE so that we don't have to redraw all this.
839            mDirtyRegion.set(mInvalidRegion.bounds());
840        } else {
841            // in the BUFFER_PRESERVED case, obviously, we can update only
842            // what's needed and nothing more.
843            // NOTE: this is NOT a common case, as preserving the backbuffer
844            // is costly and usually involves copying the whole update back.
845        }
846    } else {
847        if (flags & DisplayHardware::PARTIAL_UPDATES) {
848            // We need to redraw the rectangle that will be updated
849            // (pushed to the framebuffer).
850            // This is needed because PARTIAL_UPDATES only takes one
851            // rectangle instead of a region (see DisplayHardware::flip())
852            mDirtyRegion.set(mInvalidRegion.bounds());
853        } else {
854            // we need to redraw everything (the whole screen)
855            mDirtyRegion.set(hw.bounds());
856            mInvalidRegion = mDirtyRegion;
857        }
858    }
859
860    // compose all surfaces
861    composeSurfaces(mDirtyRegion);
862
863    // clear the dirty regions
864    mDirtyRegion.clear();
865}
866
867void SurfaceFlinger::composeSurfaces(const Region& dirty)
868{
869    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
870        // should never happen unless the window manager has a bug
871        // draw something...
872        drawWormhole();
873    }
874
875    status_t err = NO_ERROR;
876    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
877    size_t count = layers.size();
878
879    const DisplayHardware& hw(graphicPlane(0).displayHardware());
880    HWComposer& hwc(hw.getHwComposer());
881    hwc_layer_t* const cur(hwc.getLayers());
882
883    LOGE_IF(cur && hwc.getNumLayers() != count,
884            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
885            hwc.getNumLayers(), count);
886
887    // just to be extra-safe, use the smallest count
888    if (hwc.initCheck() == NO_ERROR) {
889        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
890    }
891
892    /*
893     *  update the per-frame h/w composer data for each layer
894     *  and build the transparent region of the FB
895     */
896    Region transparent;
897    if (cur) {
898        for (size_t i=0 ; i<count ; i++) {
899            const sp<LayerBase>& layer(layers[i]);
900            layer->setPerFrameData(&cur[i]);
901        }
902        err = hwc.prepare();
903        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
904
905        if (err == NO_ERROR) {
906            for (size_t i=0 ; i<count ; i++) {
907                if (cur[i].hints & HWC_HINT_CLEAR_FB) {
908                    const sp<LayerBase>& layer(layers[i]);
909                    if (!(layer->needsBlending())) {
910                        transparent.orSelf(layer->visibleRegionScreen);
911                    }
912                }
913            }
914
915            /*
916             *  clear the area of the FB that need to be transparent
917             */
918            transparent.andSelf(dirty);
919            if (!transparent.isEmpty()) {
920                glClearColor(0,0,0,0);
921                Region::const_iterator it = transparent.begin();
922                Region::const_iterator const end = transparent.end();
923                const int32_t height = hw.getHeight();
924                while (it != end) {
925                    const Rect& r(*it++);
926                    const GLint sy = height - (r.top + r.height());
927                    glScissor(r.left, sy, r.width(), r.height());
928                    glClear(GL_COLOR_BUFFER_BIT);
929                }
930            }
931        }
932    }
933
934
935    /*
936     * and then, render the layers targeted at the framebuffer
937     */
938    for (size_t i=0 ; i<count ; i++) {
939        if (cur) {
940            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
941                !(cur[i].flags & HWC_SKIP_LAYER)) {
942                // skip layers handled by the HAL
943                continue;
944            }
945        }
946
947        const sp<LayerBase>& layer(layers[i]);
948        const Region clip(dirty.intersect(layer->visibleRegionScreen));
949        if (!clip.isEmpty()) {
950            layer->draw(clip);
951        }
952    }
953}
954
955void SurfaceFlinger::debugFlashRegions()
956{
957    const DisplayHardware& hw(graphicPlane(0).displayHardware());
958    const uint32_t flags = hw.getFlags();
959
960    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
961            (flags & DisplayHardware::BUFFER_PRESERVED))) {
962        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
963                mDirtyRegion.bounds() : hw.bounds());
964        composeSurfaces(repaint);
965    }
966
967    TextureManager::deactivateTextures();
968
969    glDisable(GL_BLEND);
970    glDisable(GL_DITHER);
971    glDisable(GL_SCISSOR_TEST);
972
973    static int toggle = 0;
974    toggle = 1 - toggle;
975    if (toggle) {
976        glColor4f(1, 0, 1, 1);
977    } else {
978        glColor4f(1, 1, 0, 1);
979    }
980
981    Region::const_iterator it = mDirtyRegion.begin();
982    Region::const_iterator const end = mDirtyRegion.end();
983    while (it != end) {
984        const Rect& r = *it++;
985        GLfloat vertices[][2] = {
986                { r.left,  r.top },
987                { r.left,  r.bottom },
988                { r.right, r.bottom },
989                { r.right, r.top }
990        };
991        glVertexPointer(2, GL_FLOAT, 0, vertices);
992        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
993    }
994
995    if (mInvalidRegion.isEmpty()) {
996        mDirtyRegion.dump("mDirtyRegion");
997        mInvalidRegion.dump("mInvalidRegion");
998    }
999    hw.flip(mInvalidRegion);
1000
1001    if (mDebugRegion > 1)
1002        usleep(mDebugRegion * 1000);
1003
1004    glEnable(GL_SCISSOR_TEST);
1005    //mDirtyRegion.dump("mDirtyRegion");
1006}
1007
1008void SurfaceFlinger::drawWormhole() const
1009{
1010    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1011    if (region.isEmpty())
1012        return;
1013
1014    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1015    const int32_t width = hw.getWidth();
1016    const int32_t height = hw.getHeight();
1017
1018    glDisable(GL_BLEND);
1019    glDisable(GL_DITHER);
1020
1021    if (LIKELY(!mDebugBackground)) {
1022        glClearColor(0,0,0,0);
1023        Region::const_iterator it = region.begin();
1024        Region::const_iterator const end = region.end();
1025        while (it != end) {
1026            const Rect& r = *it++;
1027            const GLint sy = height - (r.top + r.height());
1028            glScissor(r.left, sy, r.width(), r.height());
1029            glClear(GL_COLOR_BUFFER_BIT);
1030        }
1031    } else {
1032        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1033                { width, height }, { 0, height }  };
1034        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1035        glVertexPointer(2, GL_SHORT, 0, vertices);
1036        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1037        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1038#if defined(GL_OES_EGL_image_external)
1039        if (GLExtensions::getInstance().haveTextureExternal()) {
1040            glDisable(GL_TEXTURE_EXTERNAL_OES);
1041        }
1042#endif
1043        glEnable(GL_TEXTURE_2D);
1044        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1045        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1046        glMatrixMode(GL_TEXTURE);
1047        glLoadIdentity();
1048        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1049        Region::const_iterator it = region.begin();
1050        Region::const_iterator const end = region.end();
1051        while (it != end) {
1052            const Rect& r = *it++;
1053            const GLint sy = height - (r.top + r.height());
1054            glScissor(r.left, sy, r.width(), r.height());
1055            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1056        }
1057        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1058        glLoadIdentity();
1059        glMatrixMode(GL_MODELVIEW);
1060    }
1061}
1062
1063void SurfaceFlinger::debugShowFPS() const
1064{
1065    static int mFrameCount;
1066    static int mLastFrameCount = 0;
1067    static nsecs_t mLastFpsTime = 0;
1068    static float mFps = 0;
1069    mFrameCount++;
1070    nsecs_t now = systemTime();
1071    nsecs_t diff = now - mLastFpsTime;
1072    if (diff > ms2ns(250)) {
1073        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1074        mLastFpsTime = now;
1075        mLastFrameCount = mFrameCount;
1076    }
1077    // XXX: mFPS has the value we want
1078 }
1079
1080status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1081{
1082    Mutex::Autolock _l(mStateLock);
1083    addLayer_l(layer);
1084    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1085    return NO_ERROR;
1086}
1087
1088status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1089{
1090    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1091    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1092}
1093
1094ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1095        const sp<LayerBaseClient>& lbc)
1096{
1097    Mutex::Autolock _l(mStateLock);
1098
1099    // attach this layer to the client
1100    ssize_t name = client->attachLayer(lbc);
1101
1102    // add this layer to the current state list
1103    addLayer_l(lbc);
1104
1105    return name;
1106}
1107
1108status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1109{
1110    Mutex::Autolock _l(mStateLock);
1111    status_t err = purgatorizeLayer_l(layer);
1112    if (err == NO_ERROR)
1113        setTransactionFlags(eTransactionNeeded);
1114    return err;
1115}
1116
1117status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1118{
1119    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1120    if (lbc != 0) {
1121        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1122    }
1123    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1124    if (index >= 0) {
1125        mLayersRemoved = true;
1126        return NO_ERROR;
1127    }
1128    return status_t(index);
1129}
1130
1131status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1132{
1133    // First add the layer to the purgatory list, which makes sure it won't
1134    // go away, then remove it from the main list (through a transaction).
1135    ssize_t err = removeLayer_l(layerBase);
1136    if (err >= 0) {
1137        mLayerPurgatory.add(layerBase);
1138    }
1139
1140    layerBase->onRemoved();
1141
1142    // it's possible that we don't find a layer, because it might
1143    // have been destroyed already -- this is not technically an error
1144    // from the user because there is a race between Client::destroySurface(),
1145    // ~Client() and ~ISurface().
1146    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1147}
1148
1149status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1150{
1151    layer->forceVisibilityTransaction();
1152    setTransactionFlags(eTraversalNeeded);
1153    return NO_ERROR;
1154}
1155
1156uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1157{
1158    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1159}
1160
1161uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1162{
1163    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1164    if ((old & flags)==0) { // wake the server up
1165        signalEvent();
1166    }
1167    return old;
1168}
1169
1170void SurfaceFlinger::openGlobalTransaction()
1171{
1172    android_atomic_inc(&mTransactionCount);
1173}
1174
1175void SurfaceFlinger::closeGlobalTransaction()
1176{
1177    if (android_atomic_dec(&mTransactionCount) == 1) {
1178        signalEvent();
1179
1180        // if there is a transaction with a resize, wait for it to
1181        // take effect before returning.
1182        Mutex::Autolock _l(mStateLock);
1183        while (mResizeTransationPending) {
1184            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1185            if (CC_UNLIKELY(err != NO_ERROR)) {
1186                // just in case something goes wrong in SF, return to the
1187                // called after a few seconds.
1188                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1189                mResizeTransationPending = false;
1190                break;
1191            }
1192        }
1193    }
1194}
1195
1196status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1197{
1198    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1199        return BAD_VALUE;
1200
1201    Mutex::Autolock _l(mStateLock);
1202    mCurrentState.freezeDisplay = 1;
1203    setTransactionFlags(eTransactionNeeded);
1204
1205    // flags is intended to communicate some sort of animation behavior
1206    // (for instance fading)
1207    return NO_ERROR;
1208}
1209
1210status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1211{
1212    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1213        return BAD_VALUE;
1214
1215    Mutex::Autolock _l(mStateLock);
1216    mCurrentState.freezeDisplay = 0;
1217    setTransactionFlags(eTransactionNeeded);
1218
1219    // flags is intended to communicate some sort of animation behavior
1220    // (for instance fading)
1221    return NO_ERROR;
1222}
1223
1224int SurfaceFlinger::setOrientation(DisplayID dpy,
1225        int orientation, uint32_t flags)
1226{
1227    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1228        return BAD_VALUE;
1229
1230    Mutex::Autolock _l(mStateLock);
1231    if (mCurrentState.orientation != orientation) {
1232        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1233            mCurrentState.orientationType = flags;
1234            mCurrentState.orientation = orientation;
1235            setTransactionFlags(eTransactionNeeded);
1236            mTransactionCV.wait(mStateLock);
1237        } else {
1238            orientation = BAD_VALUE;
1239        }
1240    }
1241    return orientation;
1242}
1243
1244sp<ISurface> SurfaceFlinger::createSurface(const sp<Client>& client, int pid,
1245        const String8& name, ISurfaceComposerClient::surface_data_t* params,
1246        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1247        uint32_t flags)
1248{
1249    sp<LayerBaseClient> layer;
1250    sp<LayerBaseClient::Surface> surfaceHandle;
1251
1252    if (int32_t(w|h) < 0) {
1253        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1254                int(w), int(h));
1255        return surfaceHandle;
1256    }
1257
1258    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1259    sp<Layer> normalLayer;
1260    switch (flags & eFXSurfaceMask) {
1261        case eFXSurfaceNormal:
1262            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1263            layer = normalLayer;
1264            break;
1265        case eFXSurfaceBlur:
1266            // for now we treat Blur as Dim, until we can implement it
1267            // efficiently.
1268        case eFXSurfaceDim:
1269            layer = createDimSurface(client, d, w, h, flags);
1270            break;
1271    }
1272
1273    if (layer != 0) {
1274        layer->initStates(w, h, flags);
1275        layer->setName(name);
1276        ssize_t token = addClientLayer(client, layer);
1277
1278        surfaceHandle = layer->getSurface();
1279        if (surfaceHandle != 0) {
1280            params->token = token;
1281            params->identity = surfaceHandle->getIdentity();
1282            params->width = w;
1283            params->height = h;
1284            params->format = format;
1285            if (normalLayer != 0) {
1286                Mutex::Autolock _l(mStateLock);
1287                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1288            }
1289        }
1290
1291        setTransactionFlags(eTransactionNeeded);
1292    }
1293
1294    return surfaceHandle;
1295}
1296
1297sp<Layer> SurfaceFlinger::createNormalSurface(
1298        const sp<Client>& client, DisplayID display,
1299        uint32_t w, uint32_t h, uint32_t flags,
1300        PixelFormat& format)
1301{
1302    // initialize the surfaces
1303    switch (format) { // TODO: take h/w into account
1304    case PIXEL_FORMAT_TRANSPARENT:
1305    case PIXEL_FORMAT_TRANSLUCENT:
1306        format = PIXEL_FORMAT_RGBA_8888;
1307        break;
1308    case PIXEL_FORMAT_OPAQUE:
1309#ifdef NO_RGBX_8888
1310        format = PIXEL_FORMAT_RGB_565;
1311#else
1312        format = PIXEL_FORMAT_RGBX_8888;
1313#endif
1314        break;
1315    }
1316
1317#ifdef NO_RGBX_8888
1318    if (format == PIXEL_FORMAT_RGBX_8888)
1319        format = PIXEL_FORMAT_RGBA_8888;
1320#endif
1321
1322    sp<Layer> layer = new Layer(this, display, client);
1323    status_t err = layer->setBuffers(w, h, format, flags);
1324    if (LIKELY(err != NO_ERROR)) {
1325        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1326        layer.clear();
1327    }
1328    return layer;
1329}
1330
1331sp<LayerDim> SurfaceFlinger::createDimSurface(
1332        const sp<Client>& client, DisplayID display,
1333        uint32_t w, uint32_t h, uint32_t flags)
1334{
1335    sp<LayerDim> layer = new LayerDim(this, display, client);
1336    layer->initStates(w, h, flags);
1337    return layer;
1338}
1339
1340status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1341{
1342    /*
1343     * called by the window manager, when a surface should be marked for
1344     * destruction.
1345     *
1346     * The surface is removed from the current and drawing lists, but placed
1347     * in the purgatory queue, so it's not destroyed right-away (we need
1348     * to wait for all client's references to go away first).
1349     */
1350
1351    status_t err = NAME_NOT_FOUND;
1352    Mutex::Autolock _l(mStateLock);
1353    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1354    if (layer != 0) {
1355        err = purgatorizeLayer_l(layer);
1356        if (err == NO_ERROR) {
1357            setTransactionFlags(eTransactionNeeded);
1358        }
1359    }
1360    return err;
1361}
1362
1363status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1364{
1365    // called by ~ISurface() when all references are gone
1366
1367    class MessageDestroySurface : public MessageBase {
1368        SurfaceFlinger* flinger;
1369        sp<LayerBaseClient> layer;
1370    public:
1371        MessageDestroySurface(
1372                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1373            : flinger(flinger), layer(layer) { }
1374        virtual bool handler() {
1375            sp<LayerBaseClient> l(layer);
1376            layer.clear(); // clear it outside of the lock;
1377            Mutex::Autolock _l(flinger->mStateLock);
1378            /*
1379             * remove the layer from the current list -- chances are that it's
1380             * not in the list anyway, because it should have been removed
1381             * already upon request of the client (eg: window manager).
1382             * However, a buggy client could have not done that.
1383             * Since we know we don't have any more clients, we don't need
1384             * to use the purgatory.
1385             */
1386            status_t err = flinger->removeLayer_l(l);
1387            if (err == NAME_NOT_FOUND) {
1388                // The surface wasn't in the current list, which means it was
1389                // removed already, which means it is in the purgatory,
1390                // and need to be removed from there.
1391                // This needs to happen from the main thread since its dtor
1392                // must run from there (b/c of OpenGL ES). Additionally, we
1393                // can't really acquire our internal lock from
1394                // destroySurface() -- see postMessage() below.
1395                ssize_t idx = flinger->mLayerPurgatory.remove(l);
1396                LOGE_IF(idx < 0,
1397                        "layer=%p is not in the purgatory list", l.get());
1398            }
1399
1400            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1401                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1402            return true;
1403        }
1404    };
1405
1406    postMessageAsync( new MessageDestroySurface(this, layer) );
1407    return NO_ERROR;
1408}
1409
1410status_t SurfaceFlinger::setClientState(
1411        const sp<Client>& client,
1412        int32_t count,
1413        const layer_state_t* states)
1414{
1415    Mutex::Autolock _l(mStateLock);
1416    uint32_t flags = 0;
1417    for (int i=0 ; i<count ; i++) {
1418        const layer_state_t& s(states[i]);
1419        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1420        if (layer != 0) {
1421            const uint32_t what = s.what;
1422            if (what & ePositionChanged) {
1423                if (layer->setPosition(s.x, s.y))
1424                    flags |= eTraversalNeeded;
1425            }
1426            if (what & eLayerChanged) {
1427                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1428                if (layer->setLayer(s.z)) {
1429                    mCurrentState.layersSortedByZ.removeAt(idx);
1430                    mCurrentState.layersSortedByZ.add(layer);
1431                    // we need traversal (state changed)
1432                    // AND transaction (list changed)
1433                    flags |= eTransactionNeeded|eTraversalNeeded;
1434                }
1435            }
1436            if (what & eSizeChanged) {
1437                if (layer->setSize(s.w, s.h)) {
1438                    flags |= eTraversalNeeded;
1439                    mResizeTransationPending = true;
1440                }
1441            }
1442            if (what & eAlphaChanged) {
1443                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1444                    flags |= eTraversalNeeded;
1445            }
1446            if (what & eMatrixChanged) {
1447                if (layer->setMatrix(s.matrix))
1448                    flags |= eTraversalNeeded;
1449            }
1450            if (what & eTransparentRegionChanged) {
1451                if (layer->setTransparentRegionHint(s.transparentRegion))
1452                    flags |= eTraversalNeeded;
1453            }
1454            if (what & eVisibilityChanged) {
1455                if (layer->setFlags(s.flags, s.mask))
1456                    flags |= eTraversalNeeded;
1457            }
1458        }
1459    }
1460    if (flags) {
1461        setTransactionFlags(flags);
1462    }
1463    return NO_ERROR;
1464}
1465
1466void SurfaceFlinger::screenReleased(int dpy)
1467{
1468    // this may be called by a signal handler, we can't do too much in here
1469    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1470    signalEvent();
1471}
1472
1473void SurfaceFlinger::screenAcquired(int dpy)
1474{
1475    // this may be called by a signal handler, we can't do too much in here
1476    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1477    signalEvent();
1478}
1479
1480status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1481{
1482    const size_t SIZE = 4096;
1483    char buffer[SIZE];
1484    String8 result;
1485    if (!mDump.checkCalling()) {
1486        snprintf(buffer, SIZE, "Permission Denial: "
1487                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1488                IPCThreadState::self()->getCallingPid(),
1489                IPCThreadState::self()->getCallingUid());
1490        result.append(buffer);
1491    } else {
1492
1493        // figure out if we're stuck somewhere
1494        const nsecs_t now = systemTime();
1495        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1496        const nsecs_t inTransaction(mDebugInTransaction);
1497        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1498        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1499
1500        // Try to get the main lock, but don't insist if we can't
1501        // (this would indicate SF is stuck, but we want to be able to
1502        // print something in dumpsys).
1503        int retry = 3;
1504        while (mStateLock.tryLock()<0 && --retry>=0) {
1505            usleep(1000000);
1506        }
1507        const bool locked(retry >= 0);
1508        if (!locked) {
1509            snprintf(buffer, SIZE,
1510                    "SurfaceFlinger appears to be unresponsive, "
1511                    "dumping anyways (no locks held)\n");
1512            result.append(buffer);
1513        }
1514
1515        /*
1516         * Dump the visible layer list
1517         */
1518        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1519        const size_t count = currentLayers.size();
1520        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1521        result.append(buffer);
1522        for (size_t i=0 ; i<count ; i++) {
1523            const sp<LayerBase>& layer(currentLayers[i]);
1524            layer->dump(result, buffer, SIZE);
1525            const Layer::State& s(layer->drawingState());
1526            s.transparentRegion.dump(result, "transparentRegion");
1527            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1528            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1529        }
1530
1531        /*
1532         * Dump the layers in the purgatory
1533         */
1534
1535        const size_t purgatorySize =  mLayerPurgatory.size();
1536        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1537        result.append(buffer);
1538        for (size_t i=0 ; i<purgatorySize ; i++) {
1539            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1540            layer->shortDump(result, buffer, SIZE);
1541        }
1542
1543        /*
1544         * Dump SurfaceFlinger global state
1545         */
1546
1547        snprintf(buffer, SIZE, "SurfaceFlinger global state\n");
1548        result.append(buffer);
1549        mWormholeRegion.dump(result, "WormholeRegion");
1550        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1551        snprintf(buffer, SIZE,
1552                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1553                mFreezeDisplay?"yes":"no", mFreezeCount,
1554                mCurrentState.orientation, hw.canDraw());
1555        result.append(buffer);
1556        snprintf(buffer, SIZE,
1557                "  last eglSwapBuffers() time: %f us\n"
1558                "  last transaction time     : %f us\n",
1559                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1560        result.append(buffer);
1561
1562        if (inSwapBuffersDuration || !locked) {
1563            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1564                    inSwapBuffersDuration/1000.0);
1565            result.append(buffer);
1566        }
1567
1568        if (inTransactionDuration || !locked) {
1569            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1570                    inTransactionDuration/1000.0);
1571            result.append(buffer);
1572        }
1573
1574        /*
1575         * Dump HWComposer state
1576         */
1577        HWComposer& hwc(hw.getHwComposer());
1578        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1579                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1580                mDebugDisableHWC ? "disabled" : "enabled");
1581        result.append(buffer);
1582        hwc.dump(result, buffer, SIZE);
1583
1584        /*
1585         * Dump gralloc state
1586         */
1587        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1588        alloc.dump(result);
1589        hw.dump(result);
1590
1591        if (locked) {
1592            mStateLock.unlock();
1593        }
1594    }
1595    write(fd, result.string(), result.size());
1596    return NO_ERROR;
1597}
1598
1599status_t SurfaceFlinger::onTransact(
1600    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1601{
1602    switch (code) {
1603        case CREATE_CONNECTION:
1604        case OPEN_GLOBAL_TRANSACTION:
1605        case CLOSE_GLOBAL_TRANSACTION:
1606        case SET_ORIENTATION:
1607        case FREEZE_DISPLAY:
1608        case UNFREEZE_DISPLAY:
1609        case BOOT_FINISHED:
1610        case TURN_ELECTRON_BEAM_OFF:
1611        case TURN_ELECTRON_BEAM_ON:
1612        {
1613            // codes that require permission check
1614            IPCThreadState* ipc = IPCThreadState::self();
1615            const int pid = ipc->getCallingPid();
1616            const int uid = ipc->getCallingUid();
1617            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1618                LOGE("Permission Denial: "
1619                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1620                return PERMISSION_DENIED;
1621            }
1622            break;
1623        }
1624        case CAPTURE_SCREEN:
1625        {
1626            // codes that require permission check
1627            IPCThreadState* ipc = IPCThreadState::self();
1628            const int pid = ipc->getCallingPid();
1629            const int uid = ipc->getCallingUid();
1630            if ((uid != AID_GRAPHICS) && !mReadFramebuffer.check(pid, uid)) {
1631                LOGE("Permission Denial: "
1632                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1633                return PERMISSION_DENIED;
1634            }
1635            break;
1636        }
1637    }
1638
1639    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1640    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1641        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1642        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1643            IPCThreadState* ipc = IPCThreadState::self();
1644            const int pid = ipc->getCallingPid();
1645            const int uid = ipc->getCallingUid();
1646            LOGE("Permission Denial: "
1647                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1648            return PERMISSION_DENIED;
1649        }
1650        int n;
1651        switch (code) {
1652            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1653            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1654                return NO_ERROR;
1655            case 1002:  // SHOW_UPDATES
1656                n = data.readInt32();
1657                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1658                return NO_ERROR;
1659            case 1003:  // SHOW_BACKGROUND
1660                n = data.readInt32();
1661                mDebugBackground = n ? 1 : 0;
1662                return NO_ERROR;
1663            case 1008:  // toggle use of hw composer
1664                n = data.readInt32();
1665                mDebugDisableHWC = n ? 1 : 0;
1666                invalidateHwcGeometry();
1667                // fall-through...
1668            case 1004:{ // repaint everything
1669                Mutex::Autolock _l(mStateLock);
1670                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1671                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1672                signalEvent();
1673                return NO_ERROR;
1674            }
1675            case 1005:{ // force transaction
1676                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1677                return NO_ERROR;
1678            }
1679            case 1006:{ // enable/disable GraphicLog
1680                int enabled = data.readInt32();
1681                GraphicLog::getInstance().setEnabled(enabled);
1682                return NO_ERROR;
1683            }
1684            case 1007: // set mFreezeCount
1685                mFreezeCount = data.readInt32();
1686                mFreezeDisplayTime = 0;
1687                return NO_ERROR;
1688            case 1010:  // interrogate.
1689                reply->writeInt32(0);
1690                reply->writeInt32(0);
1691                reply->writeInt32(mDebugRegion);
1692                reply->writeInt32(mDebugBackground);
1693                return NO_ERROR;
1694            case 1013: {
1695                Mutex::Autolock _l(mStateLock);
1696                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1697                reply->writeInt32(hw.getPageFlipCount());
1698            }
1699            return NO_ERROR;
1700        }
1701    }
1702    return err;
1703}
1704
1705// ---------------------------------------------------------------------------
1706
1707status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1708        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1709{
1710    if (!GLExtensions::getInstance().haveFramebufferObject())
1711        return INVALID_OPERATION;
1712
1713    // get screen geometry
1714    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1715    const uint32_t hw_w = hw.getWidth();
1716    const uint32_t hw_h = hw.getHeight();
1717    GLfloat u = 1;
1718    GLfloat v = 1;
1719
1720    // make sure to clear all GL error flags
1721    while ( glGetError() != GL_NO_ERROR ) ;
1722
1723    // create a FBO
1724    GLuint name, tname;
1725    glGenTextures(1, &tname);
1726    glBindTexture(GL_TEXTURE_2D, tname);
1727    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1728            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1729    if (glGetError() != GL_NO_ERROR) {
1730        while ( glGetError() != GL_NO_ERROR ) ;
1731        GLint tw = (2 << (31 - clz(hw_w)));
1732        GLint th = (2 << (31 - clz(hw_h)));
1733        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1734                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1735        u = GLfloat(hw_w) / tw;
1736        v = GLfloat(hw_h) / th;
1737    }
1738    glGenFramebuffersOES(1, &name);
1739    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1740    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1741            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1742
1743    // redraw the screen entirely...
1744    glClearColor(0,0,0,1);
1745    glClear(GL_COLOR_BUFFER_BIT);
1746    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1747    const size_t count = layers.size();
1748    for (size_t i=0 ; i<count ; ++i) {
1749        const sp<LayerBase>& layer(layers[i]);
1750        layer->drawForSreenShot();
1751    }
1752
1753    // back to main framebuffer
1754    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1755    glDisable(GL_SCISSOR_TEST);
1756    glDeleteFramebuffersOES(1, &name);
1757
1758    *textureName = tname;
1759    *uOut = u;
1760    *vOut = v;
1761    return NO_ERROR;
1762}
1763
1764// ---------------------------------------------------------------------------
1765
1766status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1767{
1768    status_t result = PERMISSION_DENIED;
1769
1770    if (!GLExtensions::getInstance().haveFramebufferObject())
1771        return INVALID_OPERATION;
1772
1773    // get screen geometry
1774    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1775    const uint32_t hw_w = hw.getWidth();
1776    const uint32_t hw_h = hw.getHeight();
1777    const Region screenBounds(hw.bounds());
1778
1779    GLfloat u, v;
1780    GLuint tname;
1781    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1782    if (result != NO_ERROR) {
1783        return result;
1784    }
1785
1786    GLfloat vtx[8];
1787    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1788    glEnable(GL_TEXTURE_2D);
1789    glBindTexture(GL_TEXTURE_2D, tname);
1790    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1791    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1792    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1793    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1794    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1795    glVertexPointer(2, GL_FLOAT, 0, vtx);
1796
1797    class s_curve_interpolator {
1798        const float nbFrames, s, v;
1799    public:
1800        s_curve_interpolator(int nbFrames, float s)
1801        : nbFrames(1.0f / (nbFrames-1)), s(s),
1802          v(1.0f + expf(-s + 0.5f*s)) {
1803        }
1804        float operator()(int f) {
1805            const float x = f * nbFrames;
1806            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1807        }
1808    };
1809
1810    class v_stretch {
1811        const GLfloat hw_w, hw_h;
1812    public:
1813        v_stretch(uint32_t hw_w, uint32_t hw_h)
1814        : hw_w(hw_w), hw_h(hw_h) {
1815        }
1816        void operator()(GLfloat* vtx, float v) {
1817            const GLfloat w = hw_w + (hw_w * v);
1818            const GLfloat h = hw_h - (hw_h * v);
1819            const GLfloat x = (hw_w - w) * 0.5f;
1820            const GLfloat y = (hw_h - h) * 0.5f;
1821            vtx[0] = x;         vtx[1] = y;
1822            vtx[2] = x;         vtx[3] = y + h;
1823            vtx[4] = x + w;     vtx[5] = y + h;
1824            vtx[6] = x + w;     vtx[7] = y;
1825        }
1826    };
1827
1828    class h_stretch {
1829        const GLfloat hw_w, hw_h;
1830    public:
1831        h_stretch(uint32_t hw_w, uint32_t hw_h)
1832        : hw_w(hw_w), hw_h(hw_h) {
1833        }
1834        void operator()(GLfloat* vtx, float v) {
1835            const GLfloat w = hw_w - (hw_w * v);
1836            const GLfloat h = 1.0f;
1837            const GLfloat x = (hw_w - w) * 0.5f;
1838            const GLfloat y = (hw_h - h) * 0.5f;
1839            vtx[0] = x;         vtx[1] = y;
1840            vtx[2] = x;         vtx[3] = y + h;
1841            vtx[4] = x + w;     vtx[5] = y + h;
1842            vtx[6] = x + w;     vtx[7] = y;
1843        }
1844    };
1845
1846    // the full animation is 24 frames
1847    const int nbFrames = 12;
1848    s_curve_interpolator itr(nbFrames, 7.5f);
1849    s_curve_interpolator itg(nbFrames, 8.0f);
1850    s_curve_interpolator itb(nbFrames, 8.5f);
1851
1852    v_stretch vverts(hw_w, hw_h);
1853    glEnable(GL_BLEND);
1854    glBlendFunc(GL_ONE, GL_ONE);
1855    for (int i=0 ; i<nbFrames ; i++) {
1856        float x, y, w, h;
1857        const float vr = itr(i);
1858        const float vg = itg(i);
1859        const float vb = itb(i);
1860
1861        // clear screen
1862        glColorMask(1,1,1,1);
1863        glClear(GL_COLOR_BUFFER_BIT);
1864        glEnable(GL_TEXTURE_2D);
1865
1866        // draw the red plane
1867        vverts(vtx, vr);
1868        glColorMask(1,0,0,1);
1869        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1870
1871        // draw the green plane
1872        vverts(vtx, vg);
1873        glColorMask(0,1,0,1);
1874        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1875
1876        // draw the blue plane
1877        vverts(vtx, vb);
1878        glColorMask(0,0,1,1);
1879        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1880
1881        // draw the white highlight (we use the last vertices)
1882        glDisable(GL_TEXTURE_2D);
1883        glColorMask(1,1,1,1);
1884        glColor4f(vg, vg, vg, 1);
1885        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1886        hw.flip(screenBounds);
1887    }
1888
1889    h_stretch hverts(hw_w, hw_h);
1890    glDisable(GL_BLEND);
1891    glDisable(GL_TEXTURE_2D);
1892    glColorMask(1,1,1,1);
1893    for (int i=0 ; i<nbFrames ; i++) {
1894        const float v = itg(i);
1895        hverts(vtx, v);
1896        glClear(GL_COLOR_BUFFER_BIT);
1897        glColor4f(1-v, 1-v, 1-v, 1);
1898        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1899        hw.flip(screenBounds);
1900    }
1901
1902    glColorMask(1,1,1,1);
1903    glEnable(GL_SCISSOR_TEST);
1904    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1905    glDeleteTextures(1, &tname);
1906    return NO_ERROR;
1907}
1908
1909status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1910{
1911    status_t result = PERMISSION_DENIED;
1912
1913    if (!GLExtensions::getInstance().haveFramebufferObject())
1914        return INVALID_OPERATION;
1915
1916
1917    // get screen geometry
1918    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1919    const uint32_t hw_w = hw.getWidth();
1920    const uint32_t hw_h = hw.getHeight();
1921    const Region screenBounds(hw.bounds());
1922
1923    GLfloat u, v;
1924    GLuint tname;
1925    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1926    if (result != NO_ERROR) {
1927        return result;
1928    }
1929
1930    // back to main framebuffer
1931    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1932    glDisable(GL_SCISSOR_TEST);
1933
1934    GLfloat vtx[8];
1935    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1936    glEnable(GL_TEXTURE_2D);
1937    glBindTexture(GL_TEXTURE_2D, tname);
1938    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1939    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1940    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1941    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1942    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1943    glVertexPointer(2, GL_FLOAT, 0, vtx);
1944
1945    class s_curve_interpolator {
1946        const float nbFrames, s, v;
1947    public:
1948        s_curve_interpolator(int nbFrames, float s)
1949        : nbFrames(1.0f / (nbFrames-1)), s(s),
1950          v(1.0f + expf(-s + 0.5f*s)) {
1951        }
1952        float operator()(int f) {
1953            const float x = f * nbFrames;
1954            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1955        }
1956    };
1957
1958    class v_stretch {
1959        const GLfloat hw_w, hw_h;
1960    public:
1961        v_stretch(uint32_t hw_w, uint32_t hw_h)
1962        : hw_w(hw_w), hw_h(hw_h) {
1963        }
1964        void operator()(GLfloat* vtx, float v) {
1965            const GLfloat w = hw_w + (hw_w * v);
1966            const GLfloat h = hw_h - (hw_h * v);
1967            const GLfloat x = (hw_w - w) * 0.5f;
1968            const GLfloat y = (hw_h - h) * 0.5f;
1969            vtx[0] = x;         vtx[1] = y;
1970            vtx[2] = x;         vtx[3] = y + h;
1971            vtx[4] = x + w;     vtx[5] = y + h;
1972            vtx[6] = x + w;     vtx[7] = y;
1973        }
1974    };
1975
1976    class h_stretch {
1977        const GLfloat hw_w, hw_h;
1978    public:
1979        h_stretch(uint32_t hw_w, uint32_t hw_h)
1980        : hw_w(hw_w), hw_h(hw_h) {
1981        }
1982        void operator()(GLfloat* vtx, float v) {
1983            const GLfloat w = hw_w - (hw_w * v);
1984            const GLfloat h = 1.0f;
1985            const GLfloat x = (hw_w - w) * 0.5f;
1986            const GLfloat y = (hw_h - h) * 0.5f;
1987            vtx[0] = x;         vtx[1] = y;
1988            vtx[2] = x;         vtx[3] = y + h;
1989            vtx[4] = x + w;     vtx[5] = y + h;
1990            vtx[6] = x + w;     vtx[7] = y;
1991        }
1992    };
1993
1994    // the full animation is 12 frames
1995    int nbFrames = 8;
1996    s_curve_interpolator itr(nbFrames, 7.5f);
1997    s_curve_interpolator itg(nbFrames, 8.0f);
1998    s_curve_interpolator itb(nbFrames, 8.5f);
1999
2000    h_stretch hverts(hw_w, hw_h);
2001    glDisable(GL_BLEND);
2002    glDisable(GL_TEXTURE_2D);
2003    glColorMask(1,1,1,1);
2004    for (int i=nbFrames-1 ; i>=0 ; i--) {
2005        const float v = itg(i);
2006        hverts(vtx, v);
2007        glClear(GL_COLOR_BUFFER_BIT);
2008        glColor4f(1-v, 1-v, 1-v, 1);
2009        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2010        hw.flip(screenBounds);
2011    }
2012
2013    nbFrames = 4;
2014    v_stretch vverts(hw_w, hw_h);
2015    glEnable(GL_BLEND);
2016    glBlendFunc(GL_ONE, GL_ONE);
2017    for (int i=nbFrames-1 ; i>=0 ; i--) {
2018        float x, y, w, h;
2019        const float vr = itr(i);
2020        const float vg = itg(i);
2021        const float vb = itb(i);
2022
2023        // clear screen
2024        glColorMask(1,1,1,1);
2025        glClear(GL_COLOR_BUFFER_BIT);
2026        glEnable(GL_TEXTURE_2D);
2027
2028        // draw the red plane
2029        vverts(vtx, vr);
2030        glColorMask(1,0,0,1);
2031        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2032
2033        // draw the green plane
2034        vverts(vtx, vg);
2035        glColorMask(0,1,0,1);
2036        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2037
2038        // draw the blue plane
2039        vverts(vtx, vb);
2040        glColorMask(0,0,1,1);
2041        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2042
2043        hw.flip(screenBounds);
2044    }
2045
2046    glColorMask(1,1,1,1);
2047    glEnable(GL_SCISSOR_TEST);
2048    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2049    glDeleteTextures(1, &tname);
2050
2051    return NO_ERROR;
2052}
2053
2054// ---------------------------------------------------------------------------
2055
2056status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2057{
2058    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2059    if (!hw.canDraw()) {
2060        // we're already off
2061        return NO_ERROR;
2062    }
2063    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2064        electronBeamOffAnimationImplLocked();
2065    }
2066
2067    // always clear the whole screen at the end of the animation
2068    glClearColor(0,0,0,1);
2069    glDisable(GL_SCISSOR_TEST);
2070    glClear(GL_COLOR_BUFFER_BIT);
2071    glEnable(GL_SCISSOR_TEST);
2072    hw.flip( Region(hw.bounds()) );
2073
2074    hw.setCanDraw(false);
2075    return NO_ERROR;
2076}
2077
2078status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2079{
2080    class MessageTurnElectronBeamOff : public MessageBase {
2081        SurfaceFlinger* flinger;
2082        int32_t mode;
2083        status_t result;
2084    public:
2085        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2086            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2087        }
2088        status_t getResult() const {
2089            return result;
2090        }
2091        virtual bool handler() {
2092            Mutex::Autolock _l(flinger->mStateLock);
2093            result = flinger->turnElectronBeamOffImplLocked(mode);
2094            return true;
2095        }
2096    };
2097
2098    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2099    status_t res = postMessageSync(msg);
2100    if (res == NO_ERROR) {
2101        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2102
2103        // work-around: when the power-manager calls us we activate the
2104        // animation. eventually, the "on" animation will be called
2105        // by the power-manager itself
2106        mElectronBeamAnimationMode = mode;
2107    }
2108    return res;
2109}
2110
2111// ---------------------------------------------------------------------------
2112
2113status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2114{
2115    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2116    if (hw.canDraw()) {
2117        // we're already on
2118        return NO_ERROR;
2119    }
2120    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2121        electronBeamOnAnimationImplLocked();
2122    }
2123    hw.setCanDraw(true);
2124
2125    // make sure to redraw the whole screen when the animation is done
2126    mDirtyRegion.set(hw.bounds());
2127    signalEvent();
2128
2129    return NO_ERROR;
2130}
2131
2132status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2133{
2134    class MessageTurnElectronBeamOn : public MessageBase {
2135        SurfaceFlinger* flinger;
2136        int32_t mode;
2137        status_t result;
2138    public:
2139        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2140            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2141        }
2142        status_t getResult() const {
2143            return result;
2144        }
2145        virtual bool handler() {
2146            Mutex::Autolock _l(flinger->mStateLock);
2147            result = flinger->turnElectronBeamOnImplLocked(mode);
2148            return true;
2149        }
2150    };
2151
2152    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2153    return NO_ERROR;
2154}
2155
2156// ---------------------------------------------------------------------------
2157
2158status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2159        sp<IMemoryHeap>* heap,
2160        uint32_t* w, uint32_t* h, PixelFormat* f,
2161        uint32_t sw, uint32_t sh,
2162        uint32_t minLayerZ, uint32_t maxLayerZ)
2163{
2164    status_t result = PERMISSION_DENIED;
2165
2166    // only one display supported for now
2167    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2168        return BAD_VALUE;
2169
2170    // make sure none of the layers are protected
2171    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2172    const size_t count = layers.size();
2173    for (size_t i=0 ; i<count ; ++i) {
2174        const sp<LayerBase>& layer(layers[i]);
2175        const uint32_t z = layer->drawingState().z;
2176        if (z >= minLayerZ && z <= maxLayerZ) {
2177            if (layer->isProtected()) {
2178                return INVALID_OPERATION;
2179            }
2180        }
2181    }
2182
2183    if (!GLExtensions::getInstance().haveFramebufferObject())
2184        return INVALID_OPERATION;
2185
2186    // get screen geometry
2187    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2188    const uint32_t hw_w = hw.getWidth();
2189    const uint32_t hw_h = hw.getHeight();
2190
2191    if ((sw > hw_w) || (sh > hw_h))
2192        return BAD_VALUE;
2193
2194    sw = (!sw) ? hw_w : sw;
2195    sh = (!sh) ? hw_h : sh;
2196    const size_t size = sw * sh * 4;
2197
2198    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2199    //        sw, sh, minLayerZ, maxLayerZ);
2200
2201    // make sure to clear all GL error flags
2202    while ( glGetError() != GL_NO_ERROR ) ;
2203
2204    // create a FBO
2205    GLuint name, tname;
2206    glGenRenderbuffersOES(1, &tname);
2207    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2208    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2209    glGenFramebuffersOES(1, &name);
2210    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2211    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2212            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2213
2214    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2215
2216    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2217
2218        // invert everything, b/c glReadPixel() below will invert the FB
2219        glViewport(0, 0, sw, sh);
2220        glScissor(0, 0, sw, sh);
2221        glMatrixMode(GL_PROJECTION);
2222        glPushMatrix();
2223        glLoadIdentity();
2224        glOrthof(0, hw_w, 0, hw_h, 0, 1);
2225        glMatrixMode(GL_MODELVIEW);
2226
2227        // redraw the screen entirely...
2228        glClearColor(0,0,0,1);
2229        glClear(GL_COLOR_BUFFER_BIT);
2230
2231        for (size_t i=0 ; i<count ; ++i) {
2232            const sp<LayerBase>& layer(layers[i]);
2233            const uint32_t z = layer->drawingState().z;
2234            if (z >= minLayerZ && z <= maxLayerZ) {
2235                layer->drawForSreenShot();
2236            }
2237        }
2238
2239        // XXX: this is needed on tegra
2240        glScissor(0, 0, sw, sh);
2241
2242        // check for errors and return screen capture
2243        if (glGetError() != GL_NO_ERROR) {
2244            // error while rendering
2245            result = INVALID_OPERATION;
2246        } else {
2247            // allocate shared memory large enough to hold the
2248            // screen capture
2249            sp<MemoryHeapBase> base(
2250                    new MemoryHeapBase(size, 0, "screen-capture") );
2251            void* const ptr = base->getBase();
2252            if (ptr) {
2253                // capture the screen with glReadPixels()
2254                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2255                if (glGetError() == GL_NO_ERROR) {
2256                    *heap = base;
2257                    *w = sw;
2258                    *h = sh;
2259                    *f = PIXEL_FORMAT_RGBA_8888;
2260                    result = NO_ERROR;
2261                }
2262            } else {
2263                result = NO_MEMORY;
2264            }
2265        }
2266        glEnable(GL_SCISSOR_TEST);
2267        glViewport(0, 0, hw_w, hw_h);
2268        glMatrixMode(GL_PROJECTION);
2269        glPopMatrix();
2270        glMatrixMode(GL_MODELVIEW);
2271    } else {
2272        result = BAD_VALUE;
2273    }
2274
2275    // release FBO resources
2276    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2277    glDeleteRenderbuffersOES(1, &tname);
2278    glDeleteFramebuffersOES(1, &name);
2279
2280    hw.compositionComplete();
2281
2282    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2283
2284    return result;
2285}
2286
2287
2288status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2289        sp<IMemoryHeap>* heap,
2290        uint32_t* width, uint32_t* height, PixelFormat* format,
2291        uint32_t sw, uint32_t sh,
2292        uint32_t minLayerZ, uint32_t maxLayerZ)
2293{
2294    // only one display supported for now
2295    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2296        return BAD_VALUE;
2297
2298    if (!GLExtensions::getInstance().haveFramebufferObject())
2299        return INVALID_OPERATION;
2300
2301    class MessageCaptureScreen : public MessageBase {
2302        SurfaceFlinger* flinger;
2303        DisplayID dpy;
2304        sp<IMemoryHeap>* heap;
2305        uint32_t* w;
2306        uint32_t* h;
2307        PixelFormat* f;
2308        uint32_t sw;
2309        uint32_t sh;
2310        uint32_t minLayerZ;
2311        uint32_t maxLayerZ;
2312        status_t result;
2313    public:
2314        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2315                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2316                uint32_t sw, uint32_t sh,
2317                uint32_t minLayerZ, uint32_t maxLayerZ)
2318            : flinger(flinger), dpy(dpy),
2319              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2320              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2321              result(PERMISSION_DENIED)
2322        {
2323        }
2324        status_t getResult() const {
2325            return result;
2326        }
2327        virtual bool handler() {
2328            Mutex::Autolock _l(flinger->mStateLock);
2329
2330            // if we have secure windows, never allow the screen capture
2331            if (flinger->mSecureFrameBuffer)
2332                return true;
2333
2334            result = flinger->captureScreenImplLocked(dpy,
2335                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2336
2337            return true;
2338        }
2339    };
2340
2341    sp<MessageBase> msg = new MessageCaptureScreen(this,
2342            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2343    status_t res = postMessageSync(msg);
2344    if (res == NO_ERROR) {
2345        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2346    }
2347    return res;
2348}
2349
2350// ---------------------------------------------------------------------------
2351
2352sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2353{
2354    sp<Layer> result;
2355    Mutex::Autolock _l(mStateLock);
2356    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2357    return result;
2358}
2359
2360// ---------------------------------------------------------------------------
2361
2362Client::Client(const sp<SurfaceFlinger>& flinger)
2363    : mFlinger(flinger), mNameGenerator(1)
2364{
2365}
2366
2367Client::~Client()
2368{
2369    const size_t count = mLayers.size();
2370    for (size_t i=0 ; i<count ; i++) {
2371        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2372        if (layer != 0) {
2373            mFlinger->removeLayer(layer);
2374        }
2375    }
2376}
2377
2378status_t Client::initCheck() const {
2379    return NO_ERROR;
2380}
2381
2382ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2383{
2384    int32_t name = android_atomic_inc(&mNameGenerator);
2385    mLayers.add(name, layer);
2386    return name;
2387}
2388
2389void Client::detachLayer(const LayerBaseClient* layer)
2390{
2391    // we do a linear search here, because this doesn't happen often
2392    const size_t count = mLayers.size();
2393    for (size_t i=0 ; i<count ; i++) {
2394        if (mLayers.valueAt(i) == layer) {
2395            mLayers.removeItemsAt(i, 1);
2396            break;
2397        }
2398    }
2399}
2400sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
2401    sp<LayerBaseClient> lbc;
2402    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
2403    if (layer != 0) {
2404        lbc = layer.promote();
2405        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2406    }
2407    return lbc;
2408}
2409
2410sp<IMemoryHeap> Client::getControlBlock() const {
2411    return 0;
2412}
2413ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
2414    return -1;
2415}
2416sp<ISurface> Client::createSurface(
2417        ISurfaceComposerClient::surface_data_t* params, int pid,
2418        const String8& name,
2419        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2420        uint32_t flags)
2421{
2422    return mFlinger->createSurface(this, pid, name, params,
2423            display, w, h, format, flags);
2424}
2425status_t Client::destroySurface(SurfaceID sid) {
2426    return mFlinger->removeSurface(this, sid);
2427}
2428status_t Client::setState(int32_t count, const layer_state_t* states) {
2429    return mFlinger->setClientState(this, count, states);
2430}
2431
2432// ---------------------------------------------------------------------------
2433
2434UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
2435    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
2436{
2437    const int pgsize = getpagesize();
2438    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
2439
2440    mCblkHeap = new MemoryHeapBase(cblksize, 0,
2441            "SurfaceFlinger Client control-block");
2442
2443    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
2444    if (ctrlblk) { // construct the shared structure in-place.
2445        new(ctrlblk) SharedClient;
2446    }
2447}
2448
2449UserClient::~UserClient()
2450{
2451    if (ctrlblk) {
2452        ctrlblk->~SharedClient();  // destroy our shared-structure.
2453    }
2454
2455    /*
2456     * When a UserClient dies, it's unclear what to do exactly.
2457     * We could go ahead and destroy all surfaces linked to that client
2458     * however, it wouldn't be fair to the main Client
2459     * (usually the the window-manager), which might want to re-target
2460     * the layer to another UserClient.
2461     * I think the best is to do nothing, or not much; in most cases the
2462     * WM itself will go ahead and clean things up when it detects a client of
2463     * his has died.
2464     * The remaining question is what to display? currently we keep
2465     * just keep the current buffer.
2466     */
2467}
2468
2469status_t UserClient::initCheck() const {
2470    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
2471}
2472
2473void UserClient::detachLayer(const Layer* layer)
2474{
2475    int32_t name = layer->getToken();
2476    if (name >= 0) {
2477        int32_t mask = 1LU<<name;
2478        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
2479            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
2480        }
2481    }
2482}
2483
2484sp<IMemoryHeap> UserClient::getControlBlock() const {
2485    return mCblkHeap;
2486}
2487
2488ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
2489{
2490    int32_t name = NAME_NOT_FOUND;
2491    sp<Layer> layer(mFlinger->getLayer(sur));
2492    if (layer == 0) {
2493        return name;
2494    }
2495
2496    // if this layer already has a token, just return it
2497    name = layer->getToken();
2498    if ((name >= 0) && (layer->getClient() == this)) {
2499        return name;
2500    }
2501
2502    name = 0;
2503    do {
2504        int32_t mask = 1LU<<name;
2505        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
2506            // we found and locked that name
2507            status_t err = layer->setToken(
2508                    const_cast<UserClient*>(this), ctrlblk, name);
2509            if (err != NO_ERROR) {
2510                // free the name
2511                android_atomic_and(~mask, &mBitmap);
2512                name = err;
2513            }
2514            break;
2515        }
2516        if (++name >= int32_t(SharedBufferStack::NUM_LAYERS_MAX))
2517            name = NO_MEMORY;
2518    } while(name >= 0);
2519
2520    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
2521    //        sur->asBinder().get(), name, this, mBitmap);
2522    return name;
2523}
2524
2525sp<ISurface> UserClient::createSurface(
2526        ISurfaceComposerClient::surface_data_t* params, int pid,
2527        const String8& name,
2528        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2529        uint32_t flags) {
2530    return 0;
2531}
2532status_t UserClient::destroySurface(SurfaceID sid) {
2533    return INVALID_OPERATION;
2534}
2535status_t UserClient::setState(int32_t count, const layer_state_t* states) {
2536    return INVALID_OPERATION;
2537}
2538
2539// ---------------------------------------------------------------------------
2540
2541GraphicBufferAlloc::GraphicBufferAlloc() {}
2542
2543GraphicBufferAlloc::~GraphicBufferAlloc() {}
2544
2545sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2546        PixelFormat format, uint32_t usage) {
2547    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2548    status_t err = graphicBuffer->initCheck();
2549    if (err != 0) {
2550        LOGE("createGraphicBuffer: init check failed: %d", err);
2551        return 0;
2552    } else if (graphicBuffer->handle == 0) {
2553        LOGE("createGraphicBuffer: unable to create GraphicBuffer");
2554        return 0;
2555    }
2556    Mutex::Autolock _l(mLock);
2557    mBuffers.add(graphicBuffer);
2558    return graphicBuffer;
2559}
2560
2561void GraphicBufferAlloc::freeAllGraphicBuffersExcept(int bufIdx) {
2562    Mutex::Autolock _l(mLock);
2563    if (bufIdx >= 0 && size_t(bufIdx) < mBuffers.size()) {
2564        sp<GraphicBuffer> b(mBuffers[bufIdx]);
2565        mBuffers.clear();
2566        mBuffers.add(b);
2567    } else {
2568        mBuffers.clear();
2569    }
2570}
2571
2572// ---------------------------------------------------------------------------
2573
2574GraphicPlane::GraphicPlane()
2575    : mHw(0)
2576{
2577}
2578
2579GraphicPlane::~GraphicPlane() {
2580    delete mHw;
2581}
2582
2583bool GraphicPlane::initialized() const {
2584    return mHw ? true : false;
2585}
2586
2587int GraphicPlane::getWidth() const {
2588    return mWidth;
2589}
2590
2591int GraphicPlane::getHeight() const {
2592    return mHeight;
2593}
2594
2595void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2596{
2597    mHw = hw;
2598
2599    // initialize the display orientation transform.
2600    // it's a constant that should come from the display driver.
2601    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2602    char property[PROPERTY_VALUE_MAX];
2603    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2604        //displayOrientation
2605        switch (atoi(property)) {
2606        case 90:
2607            displayOrientation = ISurfaceComposer::eOrientation90;
2608            break;
2609        case 270:
2610            displayOrientation = ISurfaceComposer::eOrientation270;
2611            break;
2612        }
2613    }
2614
2615    const float w = hw->getWidth();
2616    const float h = hw->getHeight();
2617    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2618            &mDisplayTransform);
2619    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2620        mDisplayWidth = h;
2621        mDisplayHeight = w;
2622    } else {
2623        mDisplayWidth = w;
2624        mDisplayHeight = h;
2625    }
2626
2627    setOrientation(ISurfaceComposer::eOrientationDefault);
2628}
2629
2630status_t GraphicPlane::orientationToTransfrom(
2631        int orientation, int w, int h, Transform* tr)
2632{
2633    uint32_t flags = 0;
2634    switch (orientation) {
2635    case ISurfaceComposer::eOrientationDefault:
2636        flags = Transform::ROT_0;
2637        break;
2638    case ISurfaceComposer::eOrientation90:
2639        flags = Transform::ROT_90;
2640        break;
2641    case ISurfaceComposer::eOrientation180:
2642        flags = Transform::ROT_180;
2643        break;
2644    case ISurfaceComposer::eOrientation270:
2645        flags = Transform::ROT_270;
2646        break;
2647    default:
2648        return BAD_VALUE;
2649    }
2650    tr->set(flags, w, h);
2651    return NO_ERROR;
2652}
2653
2654status_t GraphicPlane::setOrientation(int orientation)
2655{
2656    // If the rotation can be handled in hardware, this is where
2657    // the magic should happen.
2658
2659    const DisplayHardware& hw(displayHardware());
2660    const float w = mDisplayWidth;
2661    const float h = mDisplayHeight;
2662    mWidth = int(w);
2663    mHeight = int(h);
2664
2665    Transform orientationTransform;
2666    GraphicPlane::orientationToTransfrom(orientation, w, h,
2667            &orientationTransform);
2668    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2669        mWidth = int(h);
2670        mHeight = int(w);
2671    }
2672
2673    mOrientation = orientation;
2674    mGlobalTransform = mDisplayTransform * orientationTransform;
2675    return NO_ERROR;
2676}
2677
2678const DisplayHardware& GraphicPlane::displayHardware() const {
2679    return *mHw;
2680}
2681
2682DisplayHardware& GraphicPlane::editDisplayHardware() {
2683    return *mHw;
2684}
2685
2686const Transform& GraphicPlane::transform() const {
2687    return mGlobalTransform;
2688}
2689
2690EGLDisplay GraphicPlane::getEGLDisplay() const {
2691    return mHw->getEGLDisplay();
2692}
2693
2694// ---------------------------------------------------------------------------
2695
2696}; // namespace android
2697