SurfaceFlinger.cpp revision 0ef4e15a6c12778daf464a4953d7e15e651f49ac 
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(
1245        ISurfaceComposerClient::surface_data_t* params,
1246        const String8& name,
1247        const sp<Client>& client,
1248        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1249        uint32_t flags)
1250{
1251    sp<LayerBaseClient> layer;
1252    sp<LayerBaseClient::Surface> surfaceHandle;
1253
1254    if (int32_t(w|h) < 0) {
1255        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1256                int(w), int(h));
1257        return surfaceHandle;
1258    }
1259
1260    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1261    sp<Layer> normalLayer;
1262    switch (flags & eFXSurfaceMask) {
1263        case eFXSurfaceNormal:
1264            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1265            layer = normalLayer;
1266            break;
1267        case eFXSurfaceBlur:
1268            // for now we treat Blur as Dim, until we can implement it
1269            // efficiently.
1270        case eFXSurfaceDim:
1271            layer = createDimSurface(client, d, w, h, flags);
1272            break;
1273    }
1274
1275    if (layer != 0) {
1276        layer->initStates(w, h, flags);
1277        layer->setName(name);
1278        ssize_t token = addClientLayer(client, layer);
1279
1280        surfaceHandle = layer->getSurface();
1281        if (surfaceHandle != 0) {
1282            params->token = token;
1283            params->identity = surfaceHandle->getIdentity();
1284            params->width = w;
1285            params->height = h;
1286            params->format = format;
1287            if (normalLayer != 0) {
1288                Mutex::Autolock _l(mStateLock);
1289                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1290            }
1291        }
1292
1293        setTransactionFlags(eTransactionNeeded);
1294    }
1295
1296    return surfaceHandle;
1297}
1298
1299sp<Layer> SurfaceFlinger::createNormalSurface(
1300        const sp<Client>& client, DisplayID display,
1301        uint32_t w, uint32_t h, uint32_t flags,
1302        PixelFormat& format)
1303{
1304    // initialize the surfaces
1305    switch (format) { // TODO: take h/w into account
1306    case PIXEL_FORMAT_TRANSPARENT:
1307    case PIXEL_FORMAT_TRANSLUCENT:
1308        format = PIXEL_FORMAT_RGBA_8888;
1309        break;
1310    case PIXEL_FORMAT_OPAQUE:
1311#ifdef NO_RGBX_8888
1312        format = PIXEL_FORMAT_RGB_565;
1313#else
1314        format = PIXEL_FORMAT_RGBX_8888;
1315#endif
1316        break;
1317    }
1318
1319#ifdef NO_RGBX_8888
1320    if (format == PIXEL_FORMAT_RGBX_8888)
1321        format = PIXEL_FORMAT_RGBA_8888;
1322#endif
1323
1324    sp<Layer> layer = new Layer(this, display, client);
1325    status_t err = layer->setBuffers(w, h, format, flags);
1326    if (LIKELY(err != NO_ERROR)) {
1327        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1328        layer.clear();
1329    }
1330    return layer;
1331}
1332
1333sp<LayerDim> SurfaceFlinger::createDimSurface(
1334        const sp<Client>& client, DisplayID display,
1335        uint32_t w, uint32_t h, uint32_t flags)
1336{
1337    sp<LayerDim> layer = new LayerDim(this, display, client);
1338    layer->initStates(w, h, flags);
1339    return layer;
1340}
1341
1342status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1343{
1344    /*
1345     * called by the window manager, when a surface should be marked for
1346     * destruction.
1347     *
1348     * The surface is removed from the current and drawing lists, but placed
1349     * in the purgatory queue, so it's not destroyed right-away (we need
1350     * to wait for all client's references to go away first).
1351     */
1352
1353    status_t err = NAME_NOT_FOUND;
1354    Mutex::Autolock _l(mStateLock);
1355    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1356    if (layer != 0) {
1357        err = purgatorizeLayer_l(layer);
1358        if (err == NO_ERROR) {
1359            setTransactionFlags(eTransactionNeeded);
1360        }
1361    }
1362    return err;
1363}
1364
1365status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1366{
1367    // called by ~ISurface() when all references are gone
1368
1369    class MessageDestroySurface : public MessageBase {
1370        SurfaceFlinger* flinger;
1371        sp<LayerBaseClient> layer;
1372    public:
1373        MessageDestroySurface(
1374                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1375            : flinger(flinger), layer(layer) { }
1376        virtual bool handler() {
1377            sp<LayerBaseClient> l(layer);
1378            layer.clear(); // clear it outside of the lock;
1379            Mutex::Autolock _l(flinger->mStateLock);
1380            /*
1381             * remove the layer from the current list -- chances are that it's
1382             * not in the list anyway, because it should have been removed
1383             * already upon request of the client (eg: window manager).
1384             * However, a buggy client could have not done that.
1385             * Since we know we don't have any more clients, we don't need
1386             * to use the purgatory.
1387             */
1388            status_t err = flinger->removeLayer_l(l);
1389            if (err == NAME_NOT_FOUND) {
1390                // The surface wasn't in the current list, which means it was
1391                // removed already, which means it is in the purgatory,
1392                // and need to be removed from there.
1393                // This needs to happen from the main thread since its dtor
1394                // must run from there (b/c of OpenGL ES). Additionally, we
1395                // can't really acquire our internal lock from
1396                // destroySurface() -- see postMessage() below.
1397                ssize_t idx = flinger->mLayerPurgatory.remove(l);
1398                LOGE_IF(idx < 0,
1399                        "layer=%p is not in the purgatory list", l.get());
1400            }
1401
1402            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1403                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1404            return true;
1405        }
1406    };
1407
1408    postMessageAsync( new MessageDestroySurface(this, layer) );
1409    return NO_ERROR;
1410}
1411
1412status_t SurfaceFlinger::setClientState(
1413        const sp<Client>& client,
1414        int32_t count,
1415        const layer_state_t* states)
1416{
1417    Mutex::Autolock _l(mStateLock);
1418    uint32_t flags = 0;
1419    for (int i=0 ; i<count ; i++) {
1420        const layer_state_t& s(states[i]);
1421        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1422        if (layer != 0) {
1423            const uint32_t what = s.what;
1424            if (what & ePositionChanged) {
1425                if (layer->setPosition(s.x, s.y))
1426                    flags |= eTraversalNeeded;
1427            }
1428            if (what & eLayerChanged) {
1429                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1430                if (layer->setLayer(s.z)) {
1431                    mCurrentState.layersSortedByZ.removeAt(idx);
1432                    mCurrentState.layersSortedByZ.add(layer);
1433                    // we need traversal (state changed)
1434                    // AND transaction (list changed)
1435                    flags |= eTransactionNeeded|eTraversalNeeded;
1436                }
1437            }
1438            if (what & eSizeChanged) {
1439                if (layer->setSize(s.w, s.h)) {
1440                    flags |= eTraversalNeeded;
1441                    mResizeTransationPending = true;
1442                }
1443            }
1444            if (what & eAlphaChanged) {
1445                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1446                    flags |= eTraversalNeeded;
1447            }
1448            if (what & eMatrixChanged) {
1449                if (layer->setMatrix(s.matrix))
1450                    flags |= eTraversalNeeded;
1451            }
1452            if (what & eTransparentRegionChanged) {
1453                if (layer->setTransparentRegionHint(s.transparentRegion))
1454                    flags |= eTraversalNeeded;
1455            }
1456            if (what & eVisibilityChanged) {
1457                if (layer->setFlags(s.flags, s.mask))
1458                    flags |= eTraversalNeeded;
1459            }
1460        }
1461    }
1462    if (flags) {
1463        setTransactionFlags(flags);
1464    }
1465    return NO_ERROR;
1466}
1467
1468void SurfaceFlinger::screenReleased(int dpy)
1469{
1470    // this may be called by a signal handler, we can't do too much in here
1471    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1472    signalEvent();
1473}
1474
1475void SurfaceFlinger::screenAcquired(int dpy)
1476{
1477    // this may be called by a signal handler, we can't do too much in here
1478    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1479    signalEvent();
1480}
1481
1482status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1483{
1484    const size_t SIZE = 4096;
1485    char buffer[SIZE];
1486    String8 result;
1487    if (!mDump.checkCalling()) {
1488        snprintf(buffer, SIZE, "Permission Denial: "
1489                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1490                IPCThreadState::self()->getCallingPid(),
1491                IPCThreadState::self()->getCallingUid());
1492        result.append(buffer);
1493    } else {
1494
1495        // figure out if we're stuck somewhere
1496        const nsecs_t now = systemTime();
1497        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1498        const nsecs_t inTransaction(mDebugInTransaction);
1499        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1500        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1501
1502        // Try to get the main lock, but don't insist if we can't
1503        // (this would indicate SF is stuck, but we want to be able to
1504        // print something in dumpsys).
1505        int retry = 3;
1506        while (mStateLock.tryLock()<0 && --retry>=0) {
1507            usleep(1000000);
1508        }
1509        const bool locked(retry >= 0);
1510        if (!locked) {
1511            snprintf(buffer, SIZE,
1512                    "SurfaceFlinger appears to be unresponsive, "
1513                    "dumping anyways (no locks held)\n");
1514            result.append(buffer);
1515        }
1516
1517        /*
1518         * Dump the visible layer list
1519         */
1520        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1521        const size_t count = currentLayers.size();
1522        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1523        result.append(buffer);
1524        for (size_t i=0 ; i<count ; i++) {
1525            const sp<LayerBase>& layer(currentLayers[i]);
1526            layer->dump(result, buffer, SIZE);
1527            const Layer::State& s(layer->drawingState());
1528            s.transparentRegion.dump(result, "transparentRegion");
1529            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1530            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1531        }
1532
1533        /*
1534         * Dump the layers in the purgatory
1535         */
1536
1537        const size_t purgatorySize =  mLayerPurgatory.size();
1538        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1539        result.append(buffer);
1540        for (size_t i=0 ; i<purgatorySize ; i++) {
1541            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1542            layer->shortDump(result, buffer, SIZE);
1543        }
1544
1545        /*
1546         * Dump SurfaceFlinger global state
1547         */
1548
1549        snprintf(buffer, SIZE, "SurfaceFlinger global state\n");
1550        result.append(buffer);
1551        mWormholeRegion.dump(result, "WormholeRegion");
1552        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1553        snprintf(buffer, SIZE,
1554                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1555                mFreezeDisplay?"yes":"no", mFreezeCount,
1556                mCurrentState.orientation, hw.canDraw());
1557        result.append(buffer);
1558        snprintf(buffer, SIZE,
1559                "  last eglSwapBuffers() time: %f us\n"
1560                "  last transaction time     : %f us\n",
1561                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1562        result.append(buffer);
1563
1564        if (inSwapBuffersDuration || !locked) {
1565            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1566                    inSwapBuffersDuration/1000.0);
1567            result.append(buffer);
1568        }
1569
1570        if (inTransactionDuration || !locked) {
1571            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1572                    inTransactionDuration/1000.0);
1573            result.append(buffer);
1574        }
1575
1576        /*
1577         * Dump HWComposer state
1578         */
1579        HWComposer& hwc(hw.getHwComposer());
1580        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1581                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1582                mDebugDisableHWC ? "disabled" : "enabled");
1583        result.append(buffer);
1584        hwc.dump(result, buffer, SIZE);
1585
1586        /*
1587         * Dump gralloc state
1588         */
1589        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1590        alloc.dump(result);
1591        hw.dump(result);
1592
1593        if (locked) {
1594            mStateLock.unlock();
1595        }
1596    }
1597    write(fd, result.string(), result.size());
1598    return NO_ERROR;
1599}
1600
1601status_t SurfaceFlinger::onTransact(
1602    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1603{
1604    switch (code) {
1605        case CREATE_CONNECTION:
1606        case OPEN_GLOBAL_TRANSACTION:
1607        case CLOSE_GLOBAL_TRANSACTION:
1608        case SET_ORIENTATION:
1609        case FREEZE_DISPLAY:
1610        case UNFREEZE_DISPLAY:
1611        case BOOT_FINISHED:
1612        case TURN_ELECTRON_BEAM_OFF:
1613        case TURN_ELECTRON_BEAM_ON:
1614        {
1615            // codes that require permission check
1616            IPCThreadState* ipc = IPCThreadState::self();
1617            const int pid = ipc->getCallingPid();
1618            const int uid = ipc->getCallingUid();
1619            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1620                LOGE("Permission Denial: "
1621                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1622                return PERMISSION_DENIED;
1623            }
1624            break;
1625        }
1626        case CAPTURE_SCREEN:
1627        {
1628            // codes that require permission check
1629            IPCThreadState* ipc = IPCThreadState::self();
1630            const int pid = ipc->getCallingPid();
1631            const int uid = ipc->getCallingUid();
1632            if ((uid != AID_GRAPHICS) && !mReadFramebuffer.check(pid, uid)) {
1633                LOGE("Permission Denial: "
1634                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1635                return PERMISSION_DENIED;
1636            }
1637            break;
1638        }
1639    }
1640
1641    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1642    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1643        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1644        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1645            IPCThreadState* ipc = IPCThreadState::self();
1646            const int pid = ipc->getCallingPid();
1647            const int uid = ipc->getCallingUid();
1648            LOGE("Permission Denial: "
1649                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1650            return PERMISSION_DENIED;
1651        }
1652        int n;
1653        switch (code) {
1654            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1655            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1656                return NO_ERROR;
1657            case 1002:  // SHOW_UPDATES
1658                n = data.readInt32();
1659                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1660                return NO_ERROR;
1661            case 1003:  // SHOW_BACKGROUND
1662                n = data.readInt32();
1663                mDebugBackground = n ? 1 : 0;
1664                return NO_ERROR;
1665            case 1008:  // toggle use of hw composer
1666                n = data.readInt32();
1667                mDebugDisableHWC = n ? 1 : 0;
1668                invalidateHwcGeometry();
1669                // fall-through...
1670            case 1004:{ // repaint everything
1671                Mutex::Autolock _l(mStateLock);
1672                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1673                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1674                signalEvent();
1675                return NO_ERROR;
1676            }
1677            case 1005:{ // force transaction
1678                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1679                return NO_ERROR;
1680            }
1681            case 1006:{ // enable/disable GraphicLog
1682                int enabled = data.readInt32();
1683                GraphicLog::getInstance().setEnabled(enabled);
1684                return NO_ERROR;
1685            }
1686            case 1007: // set mFreezeCount
1687                mFreezeCount = data.readInt32();
1688                mFreezeDisplayTime = 0;
1689                return NO_ERROR;
1690            case 1010:  // interrogate.
1691                reply->writeInt32(0);
1692                reply->writeInt32(0);
1693                reply->writeInt32(mDebugRegion);
1694                reply->writeInt32(mDebugBackground);
1695                return NO_ERROR;
1696            case 1013: {
1697                Mutex::Autolock _l(mStateLock);
1698                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1699                reply->writeInt32(hw.getPageFlipCount());
1700            }
1701            return NO_ERROR;
1702        }
1703    }
1704    return err;
1705}
1706
1707// ---------------------------------------------------------------------------
1708
1709status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1710        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1711{
1712    if (!GLExtensions::getInstance().haveFramebufferObject())
1713        return INVALID_OPERATION;
1714
1715    // get screen geometry
1716    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1717    const uint32_t hw_w = hw.getWidth();
1718    const uint32_t hw_h = hw.getHeight();
1719    GLfloat u = 1;
1720    GLfloat v = 1;
1721
1722    // make sure to clear all GL error flags
1723    while ( glGetError() != GL_NO_ERROR ) ;
1724
1725    // create a FBO
1726    GLuint name, tname;
1727    glGenTextures(1, &tname);
1728    glBindTexture(GL_TEXTURE_2D, tname);
1729    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1730            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1731    if (glGetError() != GL_NO_ERROR) {
1732        while ( glGetError() != GL_NO_ERROR ) ;
1733        GLint tw = (2 << (31 - clz(hw_w)));
1734        GLint th = (2 << (31 - clz(hw_h)));
1735        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1736                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1737        u = GLfloat(hw_w) / tw;
1738        v = GLfloat(hw_h) / th;
1739    }
1740    glGenFramebuffersOES(1, &name);
1741    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1742    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1743            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1744
1745    // redraw the screen entirely...
1746    glClearColor(0,0,0,1);
1747    glClear(GL_COLOR_BUFFER_BIT);
1748    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1749    const size_t count = layers.size();
1750    for (size_t i=0 ; i<count ; ++i) {
1751        const sp<LayerBase>& layer(layers[i]);
1752        layer->drawForSreenShot();
1753    }
1754
1755    // back to main framebuffer
1756    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1757    glDisable(GL_SCISSOR_TEST);
1758    glDeleteFramebuffersOES(1, &name);
1759
1760    *textureName = tname;
1761    *uOut = u;
1762    *vOut = v;
1763    return NO_ERROR;
1764}
1765
1766// ---------------------------------------------------------------------------
1767
1768status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1769{
1770    status_t result = PERMISSION_DENIED;
1771
1772    if (!GLExtensions::getInstance().haveFramebufferObject())
1773        return INVALID_OPERATION;
1774
1775    // get screen geometry
1776    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1777    const uint32_t hw_w = hw.getWidth();
1778    const uint32_t hw_h = hw.getHeight();
1779    const Region screenBounds(hw.bounds());
1780
1781    GLfloat u, v;
1782    GLuint tname;
1783    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1784    if (result != NO_ERROR) {
1785        return result;
1786    }
1787
1788    GLfloat vtx[8];
1789    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1790    glEnable(GL_TEXTURE_2D);
1791    glBindTexture(GL_TEXTURE_2D, tname);
1792    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1793    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1794    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1795    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1796    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1797    glVertexPointer(2, GL_FLOAT, 0, vtx);
1798
1799    class s_curve_interpolator {
1800        const float nbFrames, s, v;
1801    public:
1802        s_curve_interpolator(int nbFrames, float s)
1803        : nbFrames(1.0f / (nbFrames-1)), s(s),
1804          v(1.0f + expf(-s + 0.5f*s)) {
1805        }
1806        float operator()(int f) {
1807            const float x = f * nbFrames;
1808            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1809        }
1810    };
1811
1812    class v_stretch {
1813        const GLfloat hw_w, hw_h;
1814    public:
1815        v_stretch(uint32_t hw_w, uint32_t hw_h)
1816        : hw_w(hw_w), hw_h(hw_h) {
1817        }
1818        void operator()(GLfloat* vtx, float v) {
1819            const GLfloat w = hw_w + (hw_w * v);
1820            const GLfloat h = hw_h - (hw_h * v);
1821            const GLfloat x = (hw_w - w) * 0.5f;
1822            const GLfloat y = (hw_h - h) * 0.5f;
1823            vtx[0] = x;         vtx[1] = y;
1824            vtx[2] = x;         vtx[3] = y + h;
1825            vtx[4] = x + w;     vtx[5] = y + h;
1826            vtx[6] = x + w;     vtx[7] = y;
1827        }
1828    };
1829
1830    class h_stretch {
1831        const GLfloat hw_w, hw_h;
1832    public:
1833        h_stretch(uint32_t hw_w, uint32_t hw_h)
1834        : hw_w(hw_w), hw_h(hw_h) {
1835        }
1836        void operator()(GLfloat* vtx, float v) {
1837            const GLfloat w = hw_w - (hw_w * v);
1838            const GLfloat h = 1.0f;
1839            const GLfloat x = (hw_w - w) * 0.5f;
1840            const GLfloat y = (hw_h - h) * 0.5f;
1841            vtx[0] = x;         vtx[1] = y;
1842            vtx[2] = x;         vtx[3] = y + h;
1843            vtx[4] = x + w;     vtx[5] = y + h;
1844            vtx[6] = x + w;     vtx[7] = y;
1845        }
1846    };
1847
1848    // the full animation is 24 frames
1849    const int nbFrames = 12;
1850    s_curve_interpolator itr(nbFrames, 7.5f);
1851    s_curve_interpolator itg(nbFrames, 8.0f);
1852    s_curve_interpolator itb(nbFrames, 8.5f);
1853
1854    v_stretch vverts(hw_w, hw_h);
1855    glEnable(GL_BLEND);
1856    glBlendFunc(GL_ONE, GL_ONE);
1857    for (int i=0 ; i<nbFrames ; i++) {
1858        float x, y, w, h;
1859        const float vr = itr(i);
1860        const float vg = itg(i);
1861        const float vb = itb(i);
1862
1863        // clear screen
1864        glColorMask(1,1,1,1);
1865        glClear(GL_COLOR_BUFFER_BIT);
1866        glEnable(GL_TEXTURE_2D);
1867
1868        // draw the red plane
1869        vverts(vtx, vr);
1870        glColorMask(1,0,0,1);
1871        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1872
1873        // draw the green plane
1874        vverts(vtx, vg);
1875        glColorMask(0,1,0,1);
1876        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1877
1878        // draw the blue plane
1879        vverts(vtx, vb);
1880        glColorMask(0,0,1,1);
1881        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1882
1883        // draw the white highlight (we use the last vertices)
1884        glDisable(GL_TEXTURE_2D);
1885        glColorMask(1,1,1,1);
1886        glColor4f(vg, vg, vg, 1);
1887        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1888        hw.flip(screenBounds);
1889    }
1890
1891    h_stretch hverts(hw_w, hw_h);
1892    glDisable(GL_BLEND);
1893    glDisable(GL_TEXTURE_2D);
1894    glColorMask(1,1,1,1);
1895    for (int i=0 ; i<nbFrames ; i++) {
1896        const float v = itg(i);
1897        hverts(vtx, v);
1898        glClear(GL_COLOR_BUFFER_BIT);
1899        glColor4f(1-v, 1-v, 1-v, 1);
1900        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1901        hw.flip(screenBounds);
1902    }
1903
1904    glColorMask(1,1,1,1);
1905    glEnable(GL_SCISSOR_TEST);
1906    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1907    glDeleteTextures(1, &tname);
1908    return NO_ERROR;
1909}
1910
1911status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1912{
1913    status_t result = PERMISSION_DENIED;
1914
1915    if (!GLExtensions::getInstance().haveFramebufferObject())
1916        return INVALID_OPERATION;
1917
1918
1919    // get screen geometry
1920    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1921    const uint32_t hw_w = hw.getWidth();
1922    const uint32_t hw_h = hw.getHeight();
1923    const Region screenBounds(hw.bounds());
1924
1925    GLfloat u, v;
1926    GLuint tname;
1927    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1928    if (result != NO_ERROR) {
1929        return result;
1930    }
1931
1932    // back to main framebuffer
1933    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1934    glDisable(GL_SCISSOR_TEST);
1935
1936    GLfloat vtx[8];
1937    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1938    glEnable(GL_TEXTURE_2D);
1939    glBindTexture(GL_TEXTURE_2D, tname);
1940    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1941    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1942    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1943    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1944    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1945    glVertexPointer(2, GL_FLOAT, 0, vtx);
1946
1947    class s_curve_interpolator {
1948        const float nbFrames, s, v;
1949    public:
1950        s_curve_interpolator(int nbFrames, float s)
1951        : nbFrames(1.0f / (nbFrames-1)), s(s),
1952          v(1.0f + expf(-s + 0.5f*s)) {
1953        }
1954        float operator()(int f) {
1955            const float x = f * nbFrames;
1956            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1957        }
1958    };
1959
1960    class v_stretch {
1961        const GLfloat hw_w, hw_h;
1962    public:
1963        v_stretch(uint32_t hw_w, uint32_t hw_h)
1964        : hw_w(hw_w), hw_h(hw_h) {
1965        }
1966        void operator()(GLfloat* vtx, float v) {
1967            const GLfloat w = hw_w + (hw_w * v);
1968            const GLfloat h = hw_h - (hw_h * v);
1969            const GLfloat x = (hw_w - w) * 0.5f;
1970            const GLfloat y = (hw_h - h) * 0.5f;
1971            vtx[0] = x;         vtx[1] = y;
1972            vtx[2] = x;         vtx[3] = y + h;
1973            vtx[4] = x + w;     vtx[5] = y + h;
1974            vtx[6] = x + w;     vtx[7] = y;
1975        }
1976    };
1977
1978    class h_stretch {
1979        const GLfloat hw_w, hw_h;
1980    public:
1981        h_stretch(uint32_t hw_w, uint32_t hw_h)
1982        : hw_w(hw_w), hw_h(hw_h) {
1983        }
1984        void operator()(GLfloat* vtx, float v) {
1985            const GLfloat w = hw_w - (hw_w * v);
1986            const GLfloat h = 1.0f;
1987            const GLfloat x = (hw_w - w) * 0.5f;
1988            const GLfloat y = (hw_h - h) * 0.5f;
1989            vtx[0] = x;         vtx[1] = y;
1990            vtx[2] = x;         vtx[3] = y + h;
1991            vtx[4] = x + w;     vtx[5] = y + h;
1992            vtx[6] = x + w;     vtx[7] = y;
1993        }
1994    };
1995
1996    // the full animation is 12 frames
1997    int nbFrames = 8;
1998    s_curve_interpolator itr(nbFrames, 7.5f);
1999    s_curve_interpolator itg(nbFrames, 8.0f);
2000    s_curve_interpolator itb(nbFrames, 8.5f);
2001
2002    h_stretch hverts(hw_w, hw_h);
2003    glDisable(GL_BLEND);
2004    glDisable(GL_TEXTURE_2D);
2005    glColorMask(1,1,1,1);
2006    for (int i=nbFrames-1 ; i>=0 ; i--) {
2007        const float v = itg(i);
2008        hverts(vtx, v);
2009        glClear(GL_COLOR_BUFFER_BIT);
2010        glColor4f(1-v, 1-v, 1-v, 1);
2011        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2012        hw.flip(screenBounds);
2013    }
2014
2015    nbFrames = 4;
2016    v_stretch vverts(hw_w, hw_h);
2017    glEnable(GL_BLEND);
2018    glBlendFunc(GL_ONE, GL_ONE);
2019    for (int i=nbFrames-1 ; i>=0 ; i--) {
2020        float x, y, w, h;
2021        const float vr = itr(i);
2022        const float vg = itg(i);
2023        const float vb = itb(i);
2024
2025        // clear screen
2026        glColorMask(1,1,1,1);
2027        glClear(GL_COLOR_BUFFER_BIT);
2028        glEnable(GL_TEXTURE_2D);
2029
2030        // draw the red plane
2031        vverts(vtx, vr);
2032        glColorMask(1,0,0,1);
2033        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2034
2035        // draw the green plane
2036        vverts(vtx, vg);
2037        glColorMask(0,1,0,1);
2038        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2039
2040        // draw the blue plane
2041        vverts(vtx, vb);
2042        glColorMask(0,0,1,1);
2043        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2044
2045        hw.flip(screenBounds);
2046    }
2047
2048    glColorMask(1,1,1,1);
2049    glEnable(GL_SCISSOR_TEST);
2050    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2051    glDeleteTextures(1, &tname);
2052
2053    return NO_ERROR;
2054}
2055
2056// ---------------------------------------------------------------------------
2057
2058status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2059{
2060    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2061    if (!hw.canDraw()) {
2062        // we're already off
2063        return NO_ERROR;
2064    }
2065    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2066        electronBeamOffAnimationImplLocked();
2067    }
2068
2069    // always clear the whole screen at the end of the animation
2070    glClearColor(0,0,0,1);
2071    glDisable(GL_SCISSOR_TEST);
2072    glClear(GL_COLOR_BUFFER_BIT);
2073    glEnable(GL_SCISSOR_TEST);
2074    hw.flip( Region(hw.bounds()) );
2075
2076    hw.setCanDraw(false);
2077    return NO_ERROR;
2078}
2079
2080status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2081{
2082    class MessageTurnElectronBeamOff : public MessageBase {
2083        SurfaceFlinger* flinger;
2084        int32_t mode;
2085        status_t result;
2086    public:
2087        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2088            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2089        }
2090        status_t getResult() const {
2091            return result;
2092        }
2093        virtual bool handler() {
2094            Mutex::Autolock _l(flinger->mStateLock);
2095            result = flinger->turnElectronBeamOffImplLocked(mode);
2096            return true;
2097        }
2098    };
2099
2100    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2101    status_t res = postMessageSync(msg);
2102    if (res == NO_ERROR) {
2103        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2104
2105        // work-around: when the power-manager calls us we activate the
2106        // animation. eventually, the "on" animation will be called
2107        // by the power-manager itself
2108        mElectronBeamAnimationMode = mode;
2109    }
2110    return res;
2111}
2112
2113// ---------------------------------------------------------------------------
2114
2115status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2116{
2117    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2118    if (hw.canDraw()) {
2119        // we're already on
2120        return NO_ERROR;
2121    }
2122    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2123        electronBeamOnAnimationImplLocked();
2124    }
2125    hw.setCanDraw(true);
2126
2127    // make sure to redraw the whole screen when the animation is done
2128    mDirtyRegion.set(hw.bounds());
2129    signalEvent();
2130
2131    return NO_ERROR;
2132}
2133
2134status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2135{
2136    class MessageTurnElectronBeamOn : public MessageBase {
2137        SurfaceFlinger* flinger;
2138        int32_t mode;
2139        status_t result;
2140    public:
2141        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2142            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2143        }
2144        status_t getResult() const {
2145            return result;
2146        }
2147        virtual bool handler() {
2148            Mutex::Autolock _l(flinger->mStateLock);
2149            result = flinger->turnElectronBeamOnImplLocked(mode);
2150            return true;
2151        }
2152    };
2153
2154    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2155    return NO_ERROR;
2156}
2157
2158// ---------------------------------------------------------------------------
2159
2160status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2161        sp<IMemoryHeap>* heap,
2162        uint32_t* w, uint32_t* h, PixelFormat* f,
2163        uint32_t sw, uint32_t sh,
2164        uint32_t minLayerZ, uint32_t maxLayerZ)
2165{
2166    status_t result = PERMISSION_DENIED;
2167
2168    // only one display supported for now
2169    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2170        return BAD_VALUE;
2171
2172    // make sure none of the layers are protected
2173    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2174    const size_t count = layers.size();
2175    for (size_t i=0 ; i<count ; ++i) {
2176        const sp<LayerBase>& layer(layers[i]);
2177        const uint32_t z = layer->drawingState().z;
2178        if (z >= minLayerZ && z <= maxLayerZ) {
2179            if (layer->isProtected()) {
2180                return INVALID_OPERATION;
2181            }
2182        }
2183    }
2184
2185    if (!GLExtensions::getInstance().haveFramebufferObject())
2186        return INVALID_OPERATION;
2187
2188    // get screen geometry
2189    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2190    const uint32_t hw_w = hw.getWidth();
2191    const uint32_t hw_h = hw.getHeight();
2192
2193    if ((sw > hw_w) || (sh > hw_h))
2194        return BAD_VALUE;
2195
2196    sw = (!sw) ? hw_w : sw;
2197    sh = (!sh) ? hw_h : sh;
2198    const size_t size = sw * sh * 4;
2199
2200    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2201    //        sw, sh, minLayerZ, maxLayerZ);
2202
2203    // make sure to clear all GL error flags
2204    while ( glGetError() != GL_NO_ERROR ) ;
2205
2206    // create a FBO
2207    GLuint name, tname;
2208    glGenRenderbuffersOES(1, &tname);
2209    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2210    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2211    glGenFramebuffersOES(1, &name);
2212    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2213    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2214            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2215
2216    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2217
2218    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2219
2220        // invert everything, b/c glReadPixel() below will invert the FB
2221        glViewport(0, 0, sw, sh);
2222        glScissor(0, 0, sw, sh);
2223        glMatrixMode(GL_PROJECTION);
2224        glPushMatrix();
2225        glLoadIdentity();
2226        glOrthof(0, hw_w, 0, hw_h, 0, 1);
2227        glMatrixMode(GL_MODELVIEW);
2228
2229        // redraw the screen entirely...
2230        glClearColor(0,0,0,1);
2231        glClear(GL_COLOR_BUFFER_BIT);
2232
2233        for (size_t i=0 ; i<count ; ++i) {
2234            const sp<LayerBase>& layer(layers[i]);
2235            const uint32_t z = layer->drawingState().z;
2236            if (z >= minLayerZ && z <= maxLayerZ) {
2237                layer->drawForSreenShot();
2238            }
2239        }
2240
2241        // XXX: this is needed on tegra
2242        glScissor(0, 0, sw, sh);
2243
2244        // check for errors and return screen capture
2245        if (glGetError() != GL_NO_ERROR) {
2246            // error while rendering
2247            result = INVALID_OPERATION;
2248        } else {
2249            // allocate shared memory large enough to hold the
2250            // screen capture
2251            sp<MemoryHeapBase> base(
2252                    new MemoryHeapBase(size, 0, "screen-capture") );
2253            void* const ptr = base->getBase();
2254            if (ptr) {
2255                // capture the screen with glReadPixels()
2256                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2257                if (glGetError() == GL_NO_ERROR) {
2258                    *heap = base;
2259                    *w = sw;
2260                    *h = sh;
2261                    *f = PIXEL_FORMAT_RGBA_8888;
2262                    result = NO_ERROR;
2263                }
2264            } else {
2265                result = NO_MEMORY;
2266            }
2267        }
2268        glEnable(GL_SCISSOR_TEST);
2269        glViewport(0, 0, hw_w, hw_h);
2270        glMatrixMode(GL_PROJECTION);
2271        glPopMatrix();
2272        glMatrixMode(GL_MODELVIEW);
2273    } else {
2274        result = BAD_VALUE;
2275    }
2276
2277    // release FBO resources
2278    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2279    glDeleteRenderbuffersOES(1, &tname);
2280    glDeleteFramebuffersOES(1, &name);
2281
2282    hw.compositionComplete();
2283
2284    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2285
2286    return result;
2287}
2288
2289
2290status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2291        sp<IMemoryHeap>* heap,
2292        uint32_t* width, uint32_t* height, PixelFormat* format,
2293        uint32_t sw, uint32_t sh,
2294        uint32_t minLayerZ, uint32_t maxLayerZ)
2295{
2296    // only one display supported for now
2297    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2298        return BAD_VALUE;
2299
2300    if (!GLExtensions::getInstance().haveFramebufferObject())
2301        return INVALID_OPERATION;
2302
2303    class MessageCaptureScreen : public MessageBase {
2304        SurfaceFlinger* flinger;
2305        DisplayID dpy;
2306        sp<IMemoryHeap>* heap;
2307        uint32_t* w;
2308        uint32_t* h;
2309        PixelFormat* f;
2310        uint32_t sw;
2311        uint32_t sh;
2312        uint32_t minLayerZ;
2313        uint32_t maxLayerZ;
2314        status_t result;
2315    public:
2316        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2317                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2318                uint32_t sw, uint32_t sh,
2319                uint32_t minLayerZ, uint32_t maxLayerZ)
2320            : flinger(flinger), dpy(dpy),
2321              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2322              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2323              result(PERMISSION_DENIED)
2324        {
2325        }
2326        status_t getResult() const {
2327            return result;
2328        }
2329        virtual bool handler() {
2330            Mutex::Autolock _l(flinger->mStateLock);
2331
2332            // if we have secure windows, never allow the screen capture
2333            if (flinger->mSecureFrameBuffer)
2334                return true;
2335
2336            result = flinger->captureScreenImplLocked(dpy,
2337                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2338
2339            return true;
2340        }
2341    };
2342
2343    sp<MessageBase> msg = new MessageCaptureScreen(this,
2344            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2345    status_t res = postMessageSync(msg);
2346    if (res == NO_ERROR) {
2347        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2348    }
2349    return res;
2350}
2351
2352// ---------------------------------------------------------------------------
2353
2354sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2355{
2356    sp<Layer> result;
2357    Mutex::Autolock _l(mStateLock);
2358    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2359    return result;
2360}
2361
2362// ---------------------------------------------------------------------------
2363
2364Client::Client(const sp<SurfaceFlinger>& flinger)
2365    : mFlinger(flinger), mNameGenerator(1)
2366{
2367}
2368
2369Client::~Client()
2370{
2371    const size_t count = mLayers.size();
2372    for (size_t i=0 ; i<count ; i++) {
2373        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2374        if (layer != 0) {
2375            mFlinger->removeLayer(layer);
2376        }
2377    }
2378}
2379
2380status_t Client::initCheck() const {
2381    return NO_ERROR;
2382}
2383
2384ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2385{
2386    int32_t name = android_atomic_inc(&mNameGenerator);
2387    mLayers.add(name, layer);
2388    return name;
2389}
2390
2391void Client::detachLayer(const LayerBaseClient* layer)
2392{
2393    // we do a linear search here, because this doesn't happen often
2394    const size_t count = mLayers.size();
2395    for (size_t i=0 ; i<count ; i++) {
2396        if (mLayers.valueAt(i) == layer) {
2397            mLayers.removeItemsAt(i, 1);
2398            break;
2399        }
2400    }
2401}
2402sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
2403    sp<LayerBaseClient> lbc;
2404    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
2405    if (layer != 0) {
2406        lbc = layer.promote();
2407        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2408    }
2409    return lbc;
2410}
2411
2412sp<IMemoryHeap> Client::getControlBlock() const {
2413    return 0;
2414}
2415ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
2416    return -1;
2417}
2418sp<ISurface> Client::createSurface(
2419        ISurfaceComposerClient::surface_data_t* params,
2420        const String8& name,
2421        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2422        uint32_t flags)
2423{
2424    return mFlinger->createSurface(params, name, this,
2425            display, w, h, format, flags);
2426}
2427status_t Client::destroySurface(SurfaceID sid) {
2428    return mFlinger->removeSurface(this, sid);
2429}
2430status_t Client::setState(int32_t count, const layer_state_t* states) {
2431    return mFlinger->setClientState(this, count, states);
2432}
2433
2434// ---------------------------------------------------------------------------
2435
2436UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
2437    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
2438{
2439    const int pgsize = getpagesize();
2440    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
2441
2442    mCblkHeap = new MemoryHeapBase(cblksize, 0,
2443            "SurfaceFlinger Client control-block");
2444
2445    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
2446    if (ctrlblk) { // construct the shared structure in-place.
2447        new(ctrlblk) SharedClient;
2448    }
2449}
2450
2451UserClient::~UserClient()
2452{
2453    if (ctrlblk) {
2454        ctrlblk->~SharedClient();  // destroy our shared-structure.
2455    }
2456
2457    /*
2458     * When a UserClient dies, it's unclear what to do exactly.
2459     * We could go ahead and destroy all surfaces linked to that client
2460     * however, it wouldn't be fair to the main Client
2461     * (usually the the window-manager), which might want to re-target
2462     * the layer to another UserClient.
2463     * I think the best is to do nothing, or not much; in most cases the
2464     * WM itself will go ahead and clean things up when it detects a client of
2465     * his has died.
2466     * The remaining question is what to display? currently we keep
2467     * just keep the current buffer.
2468     */
2469}
2470
2471status_t UserClient::initCheck() const {
2472    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
2473}
2474
2475void UserClient::detachLayer(const Layer* layer)
2476{
2477    int32_t name = layer->getToken();
2478    if (name >= 0) {
2479        int32_t mask = 1LU<<name;
2480        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
2481            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
2482        }
2483    }
2484}
2485
2486sp<IMemoryHeap> UserClient::getControlBlock() const {
2487    return mCblkHeap;
2488}
2489
2490ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
2491{
2492    int32_t name = NAME_NOT_FOUND;
2493    sp<Layer> layer(mFlinger->getLayer(sur));
2494    if (layer == 0) {
2495        return name;
2496    }
2497
2498    // if this layer already has a token, just return it
2499    name = layer->getToken();
2500    if ((name >= 0) && (layer->getClient() == this)) {
2501        return name;
2502    }
2503
2504    name = 0;
2505    do {
2506        int32_t mask = 1LU<<name;
2507        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
2508            // we found and locked that name
2509            status_t err = layer->setToken(
2510                    const_cast<UserClient*>(this), ctrlblk, name);
2511            if (err != NO_ERROR) {
2512                // free the name
2513                android_atomic_and(~mask, &mBitmap);
2514                name = err;
2515            }
2516            break;
2517        }
2518        if (++name >= int32_t(SharedBufferStack::NUM_LAYERS_MAX))
2519            name = NO_MEMORY;
2520    } while(name >= 0);
2521
2522    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
2523    //        sur->asBinder().get(), name, this, mBitmap);
2524    return name;
2525}
2526
2527sp<ISurface> UserClient::createSurface(
2528        ISurfaceComposerClient::surface_data_t* params,
2529        const String8& name,
2530        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2531        uint32_t flags) {
2532    return 0;
2533}
2534status_t UserClient::destroySurface(SurfaceID sid) {
2535    return INVALID_OPERATION;
2536}
2537status_t UserClient::setState(int32_t count, const layer_state_t* states) {
2538    return INVALID_OPERATION;
2539}
2540
2541// ---------------------------------------------------------------------------
2542
2543GraphicBufferAlloc::GraphicBufferAlloc() {}
2544
2545GraphicBufferAlloc::~GraphicBufferAlloc() {}
2546
2547sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2548        PixelFormat format, uint32_t usage) {
2549    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2550    status_t err = graphicBuffer->initCheck();
2551    if (err != 0) {
2552        LOGE("createGraphicBuffer: init check failed: %d", err);
2553        return 0;
2554    } else if (graphicBuffer->handle == 0) {
2555        LOGE("createGraphicBuffer: unable to create GraphicBuffer");
2556        return 0;
2557    }
2558    return graphicBuffer;
2559}
2560
2561// ---------------------------------------------------------------------------
2562
2563GraphicPlane::GraphicPlane()
2564    : mHw(0)
2565{
2566}
2567
2568GraphicPlane::~GraphicPlane() {
2569    delete mHw;
2570}
2571
2572bool GraphicPlane::initialized() const {
2573    return mHw ? true : false;
2574}
2575
2576int GraphicPlane::getWidth() const {
2577    return mWidth;
2578}
2579
2580int GraphicPlane::getHeight() const {
2581    return mHeight;
2582}
2583
2584void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2585{
2586    mHw = hw;
2587
2588    // initialize the display orientation transform.
2589    // it's a constant that should come from the display driver.
2590    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2591    char property[PROPERTY_VALUE_MAX];
2592    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2593        //displayOrientation
2594        switch (atoi(property)) {
2595        case 90:
2596            displayOrientation = ISurfaceComposer::eOrientation90;
2597            break;
2598        case 270:
2599            displayOrientation = ISurfaceComposer::eOrientation270;
2600            break;
2601        }
2602    }
2603
2604    const float w = hw->getWidth();
2605    const float h = hw->getHeight();
2606    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2607            &mDisplayTransform);
2608    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2609        mDisplayWidth = h;
2610        mDisplayHeight = w;
2611    } else {
2612        mDisplayWidth = w;
2613        mDisplayHeight = h;
2614    }
2615
2616    setOrientation(ISurfaceComposer::eOrientationDefault);
2617}
2618
2619status_t GraphicPlane::orientationToTransfrom(
2620        int orientation, int w, int h, Transform* tr)
2621{
2622    uint32_t flags = 0;
2623    switch (orientation) {
2624    case ISurfaceComposer::eOrientationDefault:
2625        flags = Transform::ROT_0;
2626        break;
2627    case ISurfaceComposer::eOrientation90:
2628        flags = Transform::ROT_90;
2629        break;
2630    case ISurfaceComposer::eOrientation180:
2631        flags = Transform::ROT_180;
2632        break;
2633    case ISurfaceComposer::eOrientation270:
2634        flags = Transform::ROT_270;
2635        break;
2636    default:
2637        return BAD_VALUE;
2638    }
2639    tr->set(flags, w, h);
2640    return NO_ERROR;
2641}
2642
2643status_t GraphicPlane::setOrientation(int orientation)
2644{
2645    // If the rotation can be handled in hardware, this is where
2646    // the magic should happen.
2647
2648    const DisplayHardware& hw(displayHardware());
2649    const float w = mDisplayWidth;
2650    const float h = mDisplayHeight;
2651    mWidth = int(w);
2652    mHeight = int(h);
2653
2654    Transform orientationTransform;
2655    GraphicPlane::orientationToTransfrom(orientation, w, h,
2656            &orientationTransform);
2657    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2658        mWidth = int(h);
2659        mHeight = int(w);
2660    }
2661
2662    mOrientation = orientation;
2663    mGlobalTransform = mDisplayTransform * orientationTransform;
2664    return NO_ERROR;
2665}
2666
2667const DisplayHardware& GraphicPlane::displayHardware() const {
2668    return *mHw;
2669}
2670
2671DisplayHardware& GraphicPlane::editDisplayHardware() {
2672    return *mHw;
2673}
2674
2675const Transform& GraphicPlane::transform() const {
2676    return mGlobalTransform;
2677}
2678
2679EGLDisplay GraphicPlane::getEGLDisplay() const {
2680    return mHw->getEGLDisplay();
2681}
2682
2683// ---------------------------------------------------------------------------
2684
2685}; // namespace android
2686