SurfaceFlinger.cpp revision ca4d3602c07837d0b2ac6878685a8e327b5f30f0 
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    // call Layer's destructor
391    handleDestroyLayers();
392
393    // check for transactions
394    if (UNLIKELY(mConsoleSignals)) {
395        handleConsoleEvents();
396    }
397
398    if (LIKELY(mTransactionCount == 0)) {
399        // if we're in a global transaction, don't do anything.
400        const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
401        uint32_t transactionFlags = peekTransactionFlags(mask);
402        if (LIKELY(transactionFlags)) {
403            handleTransaction(transactionFlags);
404        }
405    }
406
407    // post surfaces (if needed)
408    handlePageFlip();
409
410    if (UNLIKELY(mHwWorkListDirty)) {
411        // build the h/w work list
412        handleWorkList();
413    }
414
415    const DisplayHardware& hw(graphicPlane(0).displayHardware());
416    if (LIKELY(hw.canDraw() && !isFrozen())) {
417        // repaint the framebuffer (if needed)
418
419        const int index = hw.getCurrentBufferIndex();
420        GraphicLog& logger(GraphicLog::getInstance());
421
422        logger.log(GraphicLog::SF_REPAINT, index);
423        handleRepaint();
424
425        // inform the h/w that we're done compositing
426        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
427        hw.compositionComplete();
428
429        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
430        postFramebuffer();
431
432        logger.log(GraphicLog::SF_REPAINT_DONE, index);
433    } else {
434        // pretend we did the post
435        hw.compositionComplete();
436        usleep(16667); // 60 fps period
437    }
438    return true;
439}
440
441void SurfaceFlinger::postFramebuffer()
442{
443    if (!mInvalidRegion.isEmpty()) {
444        const DisplayHardware& hw(graphicPlane(0).displayHardware());
445        const nsecs_t now = systemTime();
446        mDebugInSwapBuffers = now;
447        hw.flip(mInvalidRegion);
448        mLastSwapBufferTime = systemTime() - now;
449        mDebugInSwapBuffers = 0;
450        mInvalidRegion.clear();
451    }
452}
453
454void SurfaceFlinger::handleConsoleEvents()
455{
456    // something to do with the console
457    const DisplayHardware& hw = graphicPlane(0).displayHardware();
458
459    int what = android_atomic_and(0, &mConsoleSignals);
460    if (what & eConsoleAcquired) {
461        hw.acquireScreen();
462        // this is a temporary work-around, eventually this should be called
463        // by the power-manager
464        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
465    }
466
467    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
468        // We got the release signal before the acquire signal
469        mDeferReleaseConsole = false;
470        hw.releaseScreen();
471    }
472
473    if (what & eConsoleReleased) {
474        if (hw.isScreenAcquired()) {
475            hw.releaseScreen();
476        } else {
477            mDeferReleaseConsole = true;
478        }
479    }
480
481    mDirtyRegion.set(hw.bounds());
482}
483
484void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
485{
486    Mutex::Autolock _l(mStateLock);
487    const nsecs_t now = systemTime();
488    mDebugInTransaction = now;
489
490    // Here we're guaranteed that some transaction flags are set
491    // so we can call handleTransactionLocked() unconditionally.
492    // We call getTransactionFlags(), which will also clear the flags,
493    // with mStateLock held to guarantee that mCurrentState won't change
494    // until the transaction is committed.
495
496    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
497    transactionFlags = getTransactionFlags(mask);
498    handleTransactionLocked(transactionFlags);
499
500    mLastTransactionTime = systemTime() - now;
501    mDebugInTransaction = 0;
502    invalidateHwcGeometry();
503    // here the transaction has been committed
504}
505
506void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
507{
508    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
509    const size_t count = currentLayers.size();
510
511    /*
512     * Traversal of the children
513     * (perform the transaction for each of them if needed)
514     */
515
516    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
517    if (layersNeedTransaction) {
518        for (size_t i=0 ; i<count ; i++) {
519            const sp<LayerBase>& layer = currentLayers[i];
520            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
521            if (!trFlags) continue;
522
523            const uint32_t flags = layer->doTransaction(0);
524            if (flags & Layer::eVisibleRegion)
525                mVisibleRegionsDirty = true;
526        }
527    }
528
529    /*
530     * Perform our own transaction if needed
531     */
532
533    if (transactionFlags & eTransactionNeeded) {
534        if (mCurrentState.orientation != mDrawingState.orientation) {
535            // the orientation has changed, recompute all visible regions
536            // and invalidate everything.
537
538            const int dpy = 0;
539            const int orientation = mCurrentState.orientation;
540            const uint32_t type = mCurrentState.orientationType;
541            GraphicPlane& plane(graphicPlane(dpy));
542            plane.setOrientation(orientation);
543
544            // update the shared control block
545            const DisplayHardware& hw(plane.displayHardware());
546            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
547            dcblk->orientation = orientation;
548            dcblk->w = plane.getWidth();
549            dcblk->h = plane.getHeight();
550
551            mVisibleRegionsDirty = true;
552            mDirtyRegion.set(hw.bounds());
553        }
554
555        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
556            // freezing or unfreezing the display -> trigger animation if needed
557            mFreezeDisplay = mCurrentState.freezeDisplay;
558            if (mFreezeDisplay)
559                 mFreezeDisplayTime = 0;
560        }
561
562        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
563            // layers have been added
564            mVisibleRegionsDirty = true;
565        }
566
567        // some layers might have been removed, so
568        // we need to update the regions they're exposing.
569        if (mLayersRemoved) {
570            mLayersRemoved = false;
571            mVisibleRegionsDirty = true;
572            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
573            const size_t count = previousLayers.size();
574            for (size_t i=0 ; i<count ; i++) {
575                const sp<LayerBase>& layer(previousLayers[i]);
576                if (currentLayers.indexOf( layer ) < 0) {
577                    // this layer is not visible anymore
578                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
579                }
580            }
581        }
582    }
583
584    commitTransaction();
585}
586
587void SurfaceFlinger::destroyLayer(LayerBase const* layer)
588{
589    Mutex::Autolock _l(mDestroyedLayerLock);
590    mDestroyedLayers.add(layer);
591    signalEvent();
592}
593
594void SurfaceFlinger::handleDestroyLayers()
595{
596    Vector<LayerBase const *> destroyedLayers;
597
598    { // scope for the lock
599        Mutex::Autolock _l(mDestroyedLayerLock);
600        destroyedLayers = mDestroyedLayers;
601        mDestroyedLayers.clear();
602    }
603
604    // call destructors without a lock held
605    const size_t count = destroyedLayers.size();
606    for (size_t i=0 ; i<count ; i++) {
607        //LOGD("destroying %s", destroyedLayers[i]->getName().string());
608        delete destroyedLayers[i];
609    }
610}
611
612sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
613{
614    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
615}
616
617void SurfaceFlinger::computeVisibleRegions(
618    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
619{
620    const GraphicPlane& plane(graphicPlane(0));
621    const Transform& planeTransform(plane.transform());
622    const DisplayHardware& hw(plane.displayHardware());
623    const Region screenRegion(hw.bounds());
624
625    Region aboveOpaqueLayers;
626    Region aboveCoveredLayers;
627    Region dirty;
628
629    bool secureFrameBuffer = false;
630
631    size_t i = currentLayers.size();
632    while (i--) {
633        const sp<LayerBase>& layer = currentLayers[i];
634        layer->validateVisibility(planeTransform);
635
636        // start with the whole surface at its current location
637        const Layer::State& s(layer->drawingState());
638
639        /*
640         * opaqueRegion: area of a surface that is fully opaque.
641         */
642        Region opaqueRegion;
643
644        /*
645         * visibleRegion: area of a surface that is visible on screen
646         * and not fully transparent. This is essentially the layer's
647         * footprint minus the opaque regions above it.
648         * Areas covered by a translucent surface are considered visible.
649         */
650        Region visibleRegion;
651
652        /*
653         * coveredRegion: area of a surface that is covered by all
654         * visible regions above it (which includes the translucent areas).
655         */
656        Region coveredRegion;
657
658
659        // handle hidden surfaces by setting the visible region to empty
660        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
661            const bool translucent = layer->needsBlending();
662            const Rect bounds(layer->visibleBounds());
663            visibleRegion.set(bounds);
664            visibleRegion.andSelf(screenRegion);
665            if (!visibleRegion.isEmpty()) {
666                // Remove the transparent area from the visible region
667                if (translucent) {
668                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
669                }
670
671                // compute the opaque region
672                const int32_t layerOrientation = layer->getOrientation();
673                if (s.alpha==255 && !translucent &&
674                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
675                    // the opaque region is the layer's footprint
676                    opaqueRegion = visibleRegion;
677                }
678            }
679        }
680
681        // Clip the covered region to the visible region
682        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
683
684        // Update aboveCoveredLayers for next (lower) layer
685        aboveCoveredLayers.orSelf(visibleRegion);
686
687        // subtract the opaque region covered by the layers above us
688        visibleRegion.subtractSelf(aboveOpaqueLayers);
689
690        // compute this layer's dirty region
691        if (layer->contentDirty) {
692            // we need to invalidate the whole region
693            dirty = visibleRegion;
694            // as well, as the old visible region
695            dirty.orSelf(layer->visibleRegionScreen);
696            layer->contentDirty = false;
697        } else {
698            /* compute the exposed region:
699             *   the exposed region consists of two components:
700             *   1) what's VISIBLE now and was COVERED before
701             *   2) what's EXPOSED now less what was EXPOSED before
702             *
703             * note that (1) is conservative, we start with the whole
704             * visible region but only keep what used to be covered by
705             * something -- which mean it may have been exposed.
706             *
707             * (2) handles areas that were not covered by anything but got
708             * exposed because of a resize.
709             */
710            const Region newExposed = visibleRegion - coveredRegion;
711            const Region oldVisibleRegion = layer->visibleRegionScreen;
712            const Region oldCoveredRegion = layer->coveredRegionScreen;
713            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
714            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
715        }
716        dirty.subtractSelf(aboveOpaqueLayers);
717
718        // accumulate to the screen dirty region
719        dirtyRegion.orSelf(dirty);
720
721        // Update aboveOpaqueLayers for next (lower) layer
722        aboveOpaqueLayers.orSelf(opaqueRegion);
723
724        // Store the visible region is screen space
725        layer->setVisibleRegion(visibleRegion);
726        layer->setCoveredRegion(coveredRegion);
727
728        // If a secure layer is partially visible, lock-down the screen!
729        if (layer->isSecure() && !visibleRegion.isEmpty()) {
730            secureFrameBuffer = true;
731        }
732    }
733
734    // invalidate the areas where a layer was removed
735    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
736    mDirtyRegionRemovedLayer.clear();
737
738    mSecureFrameBuffer = secureFrameBuffer;
739    opaqueRegion = aboveOpaqueLayers;
740}
741
742
743void SurfaceFlinger::commitTransaction()
744{
745    mDrawingState = mCurrentState;
746    mResizeTransationPending = false;
747    mTransactionCV.broadcast();
748}
749
750void SurfaceFlinger::handlePageFlip()
751{
752    bool visibleRegions = mVisibleRegionsDirty;
753    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
754    visibleRegions |= lockPageFlip(currentLayers);
755
756        const DisplayHardware& hw = graphicPlane(0).displayHardware();
757        const Region screenRegion(hw.bounds());
758        if (visibleRegions) {
759            Region opaqueRegion;
760            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
761
762            /*
763             *  rebuild the visible layer list
764             */
765            const size_t count = currentLayers.size();
766            mVisibleLayersSortedByZ.clear();
767            mVisibleLayersSortedByZ.setCapacity(count);
768            for (size_t i=0 ; i<count ; i++) {
769                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
770                    mVisibleLayersSortedByZ.add(currentLayers[i]);
771            }
772
773            mWormholeRegion = screenRegion.subtract(opaqueRegion);
774            mVisibleRegionsDirty = false;
775            invalidateHwcGeometry();
776        }
777
778    unlockPageFlip(currentLayers);
779    mDirtyRegion.andSelf(screenRegion);
780}
781
782void SurfaceFlinger::invalidateHwcGeometry()
783{
784    mHwWorkListDirty = true;
785}
786
787bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
788{
789    bool recomputeVisibleRegions = false;
790    size_t count = currentLayers.size();
791    sp<LayerBase> const* layers = currentLayers.array();
792    for (size_t i=0 ; i<count ; i++) {
793        const sp<LayerBase>& layer(layers[i]);
794        layer->lockPageFlip(recomputeVisibleRegions);
795    }
796    return recomputeVisibleRegions;
797}
798
799void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
800{
801    const GraphicPlane& plane(graphicPlane(0));
802    const Transform& planeTransform(plane.transform());
803    size_t count = currentLayers.size();
804    sp<LayerBase> const* layers = currentLayers.array();
805    for (size_t i=0 ; i<count ; i++) {
806        const sp<LayerBase>& layer(layers[i]);
807        layer->unlockPageFlip(planeTransform, mDirtyRegion);
808    }
809}
810
811void SurfaceFlinger::handleWorkList()
812{
813    mHwWorkListDirty = false;
814    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
815    if (hwc.initCheck() == NO_ERROR) {
816        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
817        const size_t count = currentLayers.size();
818        hwc.createWorkList(count);
819        hwc_layer_t* const cur(hwc.getLayers());
820        for (size_t i=0 ; cur && i<count ; i++) {
821            currentLayers[i]->setGeometry(&cur[i]);
822            if (mDebugDisableHWC) {
823                cur[i].compositionType = HWC_FRAMEBUFFER;
824                cur[i].flags |= HWC_SKIP_LAYER;
825            }
826        }
827    }
828}
829
830void SurfaceFlinger::handleRepaint()
831{
832    // compute the invalid region
833    mInvalidRegion.orSelf(mDirtyRegion);
834
835    if (UNLIKELY(mDebugRegion)) {
836        debugFlashRegions();
837    }
838
839    // set the frame buffer
840    const DisplayHardware& hw(graphicPlane(0).displayHardware());
841    glMatrixMode(GL_MODELVIEW);
842    glLoadIdentity();
843
844    uint32_t flags = hw.getFlags();
845    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
846        (flags & DisplayHardware::BUFFER_PRESERVED))
847    {
848        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
849        // takes a rectangle, we must make sure to update that whole
850        // rectangle in that case
851        if (flags & DisplayHardware::SWAP_RECTANGLE) {
852            // TODO: we really should be able to pass a region to
853            // SWAP_RECTANGLE so that we don't have to redraw all this.
854            mDirtyRegion.set(mInvalidRegion.bounds());
855        } else {
856            // in the BUFFER_PRESERVED case, obviously, we can update only
857            // what's needed and nothing more.
858            // NOTE: this is NOT a common case, as preserving the backbuffer
859            // is costly and usually involves copying the whole update back.
860        }
861    } else {
862        if (flags & DisplayHardware::PARTIAL_UPDATES) {
863            // We need to redraw the rectangle that will be updated
864            // (pushed to the framebuffer).
865            // This is needed because PARTIAL_UPDATES only takes one
866            // rectangle instead of a region (see DisplayHardware::flip())
867            mDirtyRegion.set(mInvalidRegion.bounds());
868        } else {
869            // we need to redraw everything (the whole screen)
870            mDirtyRegion.set(hw.bounds());
871            mInvalidRegion = mDirtyRegion;
872        }
873    }
874
875    // compose all surfaces
876    composeSurfaces(mDirtyRegion);
877
878    // clear the dirty regions
879    mDirtyRegion.clear();
880}
881
882void SurfaceFlinger::composeSurfaces(const Region& dirty)
883{
884    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
885        // should never happen unless the window manager has a bug
886        // draw something...
887        drawWormhole();
888    }
889
890    status_t err = NO_ERROR;
891    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
892    size_t count = layers.size();
893
894    const DisplayHardware& hw(graphicPlane(0).displayHardware());
895    HWComposer& hwc(hw.getHwComposer());
896    hwc_layer_t* const cur(hwc.getLayers());
897
898    LOGE_IF(cur && hwc.getNumLayers() != count,
899            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
900            hwc.getNumLayers(), count);
901
902    // just to be extra-safe, use the smallest count
903    if (hwc.initCheck() == NO_ERROR) {
904        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
905    }
906
907    /*
908     *  update the per-frame h/w composer data for each layer
909     *  and build the transparent region of the FB
910     */
911    Region transparent;
912    if (cur) {
913        for (size_t i=0 ; i<count ; i++) {
914            const sp<LayerBase>& layer(layers[i]);
915            layer->setPerFrameData(&cur[i]);
916        }
917        err = hwc.prepare();
918        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
919
920        if (err == NO_ERROR) {
921            for (size_t i=0 ; i<count ; i++) {
922                if (cur[i].hints & HWC_HINT_CLEAR_FB) {
923                    const sp<LayerBase>& layer(layers[i]);
924                    if (!(layer->needsBlending())) {
925                        transparent.orSelf(layer->visibleRegionScreen);
926                    }
927                }
928            }
929
930            /*
931             *  clear the area of the FB that need to be transparent
932             */
933            transparent.andSelf(dirty);
934            if (!transparent.isEmpty()) {
935                glClearColor(0,0,0,0);
936                Region::const_iterator it = transparent.begin();
937                Region::const_iterator const end = transparent.end();
938                const int32_t height = hw.getHeight();
939                while (it != end) {
940                    const Rect& r(*it++);
941                    const GLint sy = height - (r.top + r.height());
942                    glScissor(r.left, sy, r.width(), r.height());
943                    glClear(GL_COLOR_BUFFER_BIT);
944                }
945            }
946        }
947    }
948
949
950    /*
951     * and then, render the layers targeted at the framebuffer
952     */
953    for (size_t i=0 ; i<count ; i++) {
954        if (cur) {
955            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
956                !(cur[i].flags & HWC_SKIP_LAYER)) {
957                // skip layers handled by the HAL
958                continue;
959            }
960        }
961
962        const sp<LayerBase>& layer(layers[i]);
963        const Region clip(dirty.intersect(layer->visibleRegionScreen));
964        if (!clip.isEmpty()) {
965            layer->draw(clip);
966        }
967    }
968}
969
970void SurfaceFlinger::debugFlashRegions()
971{
972    const DisplayHardware& hw(graphicPlane(0).displayHardware());
973    const uint32_t flags = hw.getFlags();
974
975    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
976            (flags & DisplayHardware::BUFFER_PRESERVED))) {
977        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
978                mDirtyRegion.bounds() : hw.bounds());
979        composeSurfaces(repaint);
980    }
981
982    TextureManager::deactivateTextures();
983
984    glDisable(GL_BLEND);
985    glDisable(GL_DITHER);
986    glDisable(GL_SCISSOR_TEST);
987
988    static int toggle = 0;
989    toggle = 1 - toggle;
990    if (toggle) {
991        glColor4f(1, 0, 1, 1);
992    } else {
993        glColor4f(1, 1, 0, 1);
994    }
995
996    Region::const_iterator it = mDirtyRegion.begin();
997    Region::const_iterator const end = mDirtyRegion.end();
998    while (it != end) {
999        const Rect& r = *it++;
1000        GLfloat vertices[][2] = {
1001                { r.left,  r.top },
1002                { r.left,  r.bottom },
1003                { r.right, r.bottom },
1004                { r.right, r.top }
1005        };
1006        glVertexPointer(2, GL_FLOAT, 0, vertices);
1007        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1008    }
1009
1010    if (mInvalidRegion.isEmpty()) {
1011        mDirtyRegion.dump("mDirtyRegion");
1012        mInvalidRegion.dump("mInvalidRegion");
1013    }
1014    hw.flip(mInvalidRegion);
1015
1016    if (mDebugRegion > 1)
1017        usleep(mDebugRegion * 1000);
1018
1019    glEnable(GL_SCISSOR_TEST);
1020    //mDirtyRegion.dump("mDirtyRegion");
1021}
1022
1023void SurfaceFlinger::drawWormhole() const
1024{
1025    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1026    if (region.isEmpty())
1027        return;
1028
1029    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1030    const int32_t width = hw.getWidth();
1031    const int32_t height = hw.getHeight();
1032
1033    glDisable(GL_BLEND);
1034    glDisable(GL_DITHER);
1035
1036    if (LIKELY(!mDebugBackground)) {
1037        glClearColor(0,0,0,0);
1038        Region::const_iterator it = region.begin();
1039        Region::const_iterator const end = region.end();
1040        while (it != end) {
1041            const Rect& r = *it++;
1042            const GLint sy = height - (r.top + r.height());
1043            glScissor(r.left, sy, r.width(), r.height());
1044            glClear(GL_COLOR_BUFFER_BIT);
1045        }
1046    } else {
1047        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1048                { width, height }, { 0, height }  };
1049        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1050        glVertexPointer(2, GL_SHORT, 0, vertices);
1051        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1052        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1053#if defined(GL_OES_EGL_image_external)
1054        if (GLExtensions::getInstance().haveTextureExternal()) {
1055            glDisable(GL_TEXTURE_EXTERNAL_OES);
1056        }
1057#endif
1058        glEnable(GL_TEXTURE_2D);
1059        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1060        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1061        glMatrixMode(GL_TEXTURE);
1062        glLoadIdentity();
1063        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1064        Region::const_iterator it = region.begin();
1065        Region::const_iterator const end = region.end();
1066        while (it != end) {
1067            const Rect& r = *it++;
1068            const GLint sy = height - (r.top + r.height());
1069            glScissor(r.left, sy, r.width(), r.height());
1070            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1071        }
1072        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1073        glLoadIdentity();
1074        glMatrixMode(GL_MODELVIEW);
1075    }
1076}
1077
1078void SurfaceFlinger::debugShowFPS() const
1079{
1080    static int mFrameCount;
1081    static int mLastFrameCount = 0;
1082    static nsecs_t mLastFpsTime = 0;
1083    static float mFps = 0;
1084    mFrameCount++;
1085    nsecs_t now = systemTime();
1086    nsecs_t diff = now - mLastFpsTime;
1087    if (diff > ms2ns(250)) {
1088        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1089        mLastFpsTime = now;
1090        mLastFrameCount = mFrameCount;
1091    }
1092    // XXX: mFPS has the value we want
1093 }
1094
1095status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1096{
1097    Mutex::Autolock _l(mStateLock);
1098    addLayer_l(layer);
1099    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1100    return NO_ERROR;
1101}
1102
1103status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1104{
1105    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1106    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1107}
1108
1109ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1110        const sp<LayerBaseClient>& lbc)
1111{
1112    // attach this layer to the client
1113    size_t name = client->attachLayer(lbc);
1114
1115    Mutex::Autolock _l(mStateLock);
1116
1117    // add this layer to the current state list
1118    addLayer_l(lbc);
1119
1120    return ssize_t(name);
1121}
1122
1123status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1124{
1125    Mutex::Autolock _l(mStateLock);
1126    status_t err = purgatorizeLayer_l(layer);
1127    if (err == NO_ERROR)
1128        setTransactionFlags(eTransactionNeeded);
1129    return err;
1130}
1131
1132status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1133{
1134    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1135    if (lbc != 0) {
1136        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1137    }
1138    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1139    if (index >= 0) {
1140        mLayersRemoved = true;
1141        return NO_ERROR;
1142    }
1143    return status_t(index);
1144}
1145
1146status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1147{
1148    // First add the layer to the purgatory list, which makes sure it won't
1149    // go away, then remove it from the main list (through a transaction).
1150    ssize_t err = removeLayer_l(layerBase);
1151    if (err >= 0) {
1152        mLayerPurgatory.add(layerBase);
1153    }
1154
1155    layerBase->onRemoved();
1156
1157    // it's possible that we don't find a layer, because it might
1158    // have been destroyed already -- this is not technically an error
1159    // from the user because there is a race between Client::destroySurface(),
1160    // ~Client() and ~ISurface().
1161    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1162}
1163
1164status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1165{
1166    layer->forceVisibilityTransaction();
1167    setTransactionFlags(eTraversalNeeded);
1168    return NO_ERROR;
1169}
1170
1171uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1172{
1173    return android_atomic_release_load(&mTransactionFlags);
1174}
1175
1176uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1177{
1178    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1179}
1180
1181uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1182{
1183    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1184    if ((old & flags)==0) { // wake the server up
1185        signalEvent();
1186    }
1187    return old;
1188}
1189
1190void SurfaceFlinger::openGlobalTransaction()
1191{
1192    android_atomic_inc(&mTransactionCount);
1193}
1194
1195void SurfaceFlinger::closeGlobalTransaction()
1196{
1197    if (android_atomic_dec(&mTransactionCount) == 1) {
1198        signalEvent();
1199
1200        // if there is a transaction with a resize, wait for it to
1201        // take effect before returning.
1202        Mutex::Autolock _l(mStateLock);
1203        while (mResizeTransationPending) {
1204            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1205            if (CC_UNLIKELY(err != NO_ERROR)) {
1206                // just in case something goes wrong in SF, return to the
1207                // called after a few seconds.
1208                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1209                mResizeTransationPending = false;
1210                break;
1211            }
1212        }
1213    }
1214}
1215
1216status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1217{
1218    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1219        return BAD_VALUE;
1220
1221    Mutex::Autolock _l(mStateLock);
1222    mCurrentState.freezeDisplay = 1;
1223    setTransactionFlags(eTransactionNeeded);
1224
1225    // flags is intended to communicate some sort of animation behavior
1226    // (for instance fading)
1227    return NO_ERROR;
1228}
1229
1230status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1231{
1232    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1233        return BAD_VALUE;
1234
1235    Mutex::Autolock _l(mStateLock);
1236    mCurrentState.freezeDisplay = 0;
1237    setTransactionFlags(eTransactionNeeded);
1238
1239    // flags is intended to communicate some sort of animation behavior
1240    // (for instance fading)
1241    return NO_ERROR;
1242}
1243
1244int SurfaceFlinger::setOrientation(DisplayID dpy,
1245        int orientation, uint32_t flags)
1246{
1247    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1248        return BAD_VALUE;
1249
1250    Mutex::Autolock _l(mStateLock);
1251    if (mCurrentState.orientation != orientation) {
1252        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1253            mCurrentState.orientationType = flags;
1254            mCurrentState.orientation = orientation;
1255            setTransactionFlags(eTransactionNeeded);
1256            mTransactionCV.wait(mStateLock);
1257        } else {
1258            orientation = BAD_VALUE;
1259        }
1260    }
1261    return orientation;
1262}
1263
1264sp<ISurface> SurfaceFlinger::createSurface(
1265        ISurfaceComposerClient::surface_data_t* params,
1266        const String8& name,
1267        const sp<Client>& client,
1268        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1269        uint32_t flags)
1270{
1271    sp<LayerBaseClient> layer;
1272    sp<LayerBaseClient::Surface> surfaceHandle;
1273
1274    if (int32_t(w|h) < 0) {
1275        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1276                int(w), int(h));
1277        return surfaceHandle;
1278    }
1279
1280    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1281    sp<Layer> normalLayer;
1282    switch (flags & eFXSurfaceMask) {
1283        case eFXSurfaceNormal:
1284            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1285            layer = normalLayer;
1286            break;
1287        case eFXSurfaceBlur:
1288            // for now we treat Blur as Dim, until we can implement it
1289            // efficiently.
1290        case eFXSurfaceDim:
1291            layer = createDimSurface(client, d, w, h, flags);
1292            break;
1293    }
1294
1295    if (layer != 0) {
1296        layer->initStates(w, h, flags);
1297        layer->setName(name);
1298        ssize_t token = addClientLayer(client, layer);
1299
1300        surfaceHandle = layer->getSurface();
1301        if (surfaceHandle != 0) {
1302            params->token = token;
1303            params->identity = surfaceHandle->getIdentity();
1304            params->width = w;
1305            params->height = h;
1306            params->format = format;
1307            if (normalLayer != 0) {
1308                Mutex::Autolock _l(mStateLock);
1309                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1310            }
1311        }
1312
1313        setTransactionFlags(eTransactionNeeded);
1314    }
1315
1316    return surfaceHandle;
1317}
1318
1319sp<Layer> SurfaceFlinger::createNormalSurface(
1320        const sp<Client>& client, DisplayID display,
1321        uint32_t w, uint32_t h, uint32_t flags,
1322        PixelFormat& format)
1323{
1324    // initialize the surfaces
1325    switch (format) { // TODO: take h/w into account
1326    case PIXEL_FORMAT_TRANSPARENT:
1327    case PIXEL_FORMAT_TRANSLUCENT:
1328        format = PIXEL_FORMAT_RGBA_8888;
1329        break;
1330    case PIXEL_FORMAT_OPAQUE:
1331#ifdef NO_RGBX_8888
1332        format = PIXEL_FORMAT_RGB_565;
1333#else
1334        format = PIXEL_FORMAT_RGBX_8888;
1335#endif
1336        break;
1337    }
1338
1339#ifdef NO_RGBX_8888
1340    if (format == PIXEL_FORMAT_RGBX_8888)
1341        format = PIXEL_FORMAT_RGBA_8888;
1342#endif
1343
1344    sp<Layer> layer = new Layer(this, display, client);
1345    status_t err = layer->setBuffers(w, h, format, flags);
1346    if (LIKELY(err != NO_ERROR)) {
1347        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1348        layer.clear();
1349    }
1350    return layer;
1351}
1352
1353sp<LayerDim> SurfaceFlinger::createDimSurface(
1354        const sp<Client>& client, DisplayID display,
1355        uint32_t w, uint32_t h, uint32_t flags)
1356{
1357    sp<LayerDim> layer = new LayerDim(this, display, client);
1358    layer->initStates(w, h, flags);
1359    return layer;
1360}
1361
1362status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1363{
1364    /*
1365     * called by the window manager, when a surface should be marked for
1366     * destruction.
1367     *
1368     * The surface is removed from the current and drawing lists, but placed
1369     * in the purgatory queue, so it's not destroyed right-away (we need
1370     * to wait for all client's references to go away first).
1371     */
1372
1373    status_t err = NAME_NOT_FOUND;
1374    Mutex::Autolock _l(mStateLock);
1375    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1376    if (layer != 0) {
1377        err = purgatorizeLayer_l(layer);
1378        if (err == NO_ERROR) {
1379            setTransactionFlags(eTransactionNeeded);
1380        }
1381    }
1382    return err;
1383}
1384
1385status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1386{
1387    // called by ~ISurface() when all references are gone
1388    status_t err = NO_ERROR;
1389    sp<LayerBaseClient> l(layer.promote());
1390    if (l != NULL) {
1391        Mutex::Autolock _l(mStateLock);
1392        err = removeLayer_l(l);
1393        if (err == NAME_NOT_FOUND) {
1394            // The surface wasn't in the current list, which means it was
1395            // removed already, which means it is in the purgatory,
1396            // and need to be removed from there.
1397            ssize_t idx = mLayerPurgatory.remove(l);
1398            LOGE_IF(idx < 0,
1399                    "layer=%p is not in the purgatory list", l.get());
1400        }
1401        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1402                "error removing layer=%p (%s)", l.get(), strerror(-err));
1403    }
1404    return err;
1405}
1406
1407status_t SurfaceFlinger::setClientState(
1408        const sp<Client>& client,
1409        int32_t count,
1410        const layer_state_t* states)
1411{
1412    Mutex::Autolock _l(mStateLock);
1413    uint32_t flags = 0;
1414    for (int i=0 ; i<count ; i++) {
1415        const layer_state_t& s(states[i]);
1416        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1417        if (layer != 0) {
1418            const uint32_t what = s.what;
1419            if (what & ePositionChanged) {
1420                if (layer->setPosition(s.x, s.y))
1421                    flags |= eTraversalNeeded;
1422            }
1423            if (what & eLayerChanged) {
1424                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1425                if (layer->setLayer(s.z)) {
1426                    mCurrentState.layersSortedByZ.removeAt(idx);
1427                    mCurrentState.layersSortedByZ.add(layer);
1428                    // we need traversal (state changed)
1429                    // AND transaction (list changed)
1430                    flags |= eTransactionNeeded|eTraversalNeeded;
1431                }
1432            }
1433            if (what & eSizeChanged) {
1434                if (layer->setSize(s.w, s.h)) {
1435                    flags |= eTraversalNeeded;
1436                    mResizeTransationPending = true;
1437                }
1438            }
1439            if (what & eAlphaChanged) {
1440                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1441                    flags |= eTraversalNeeded;
1442            }
1443            if (what & eMatrixChanged) {
1444                if (layer->setMatrix(s.matrix))
1445                    flags |= eTraversalNeeded;
1446            }
1447            if (what & eTransparentRegionChanged) {
1448                if (layer->setTransparentRegionHint(s.transparentRegion))
1449                    flags |= eTraversalNeeded;
1450            }
1451            if (what & eVisibilityChanged) {
1452                if (layer->setFlags(s.flags, s.mask))
1453                    flags |= eTraversalNeeded;
1454            }
1455        }
1456    }
1457    if (flags) {
1458        setTransactionFlags(flags);
1459    }
1460    return NO_ERROR;
1461}
1462
1463void SurfaceFlinger::screenReleased(int dpy)
1464{
1465    // this may be called by a signal handler, we can't do too much in here
1466    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1467    signalEvent();
1468}
1469
1470void SurfaceFlinger::screenAcquired(int dpy)
1471{
1472    // this may be called by a signal handler, we can't do too much in here
1473    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1474    signalEvent();
1475}
1476
1477status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1478{
1479    const size_t SIZE = 4096;
1480    char buffer[SIZE];
1481    String8 result;
1482    if (!mDump.checkCalling()) {
1483        snprintf(buffer, SIZE, "Permission Denial: "
1484                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1485                IPCThreadState::self()->getCallingPid(),
1486                IPCThreadState::self()->getCallingUid());
1487        result.append(buffer);
1488    } else {
1489
1490        // figure out if we're stuck somewhere
1491        const nsecs_t now = systemTime();
1492        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1493        const nsecs_t inTransaction(mDebugInTransaction);
1494        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1495        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1496
1497        // Try to get the main lock, but don't insist if we can't
1498        // (this would indicate SF is stuck, but we want to be able to
1499        // print something in dumpsys).
1500        int retry = 3;
1501        while (mStateLock.tryLock()<0 && --retry>=0) {
1502            usleep(1000000);
1503        }
1504        const bool locked(retry >= 0);
1505        if (!locked) {
1506            snprintf(buffer, SIZE,
1507                    "SurfaceFlinger appears to be unresponsive, "
1508                    "dumping anyways (no locks held)\n");
1509            result.append(buffer);
1510        }
1511
1512        /*
1513         * Dump the visible layer list
1514         */
1515        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1516        const size_t count = currentLayers.size();
1517        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1518        result.append(buffer);
1519        for (size_t i=0 ; i<count ; i++) {
1520            const sp<LayerBase>& layer(currentLayers[i]);
1521            layer->dump(result, buffer, SIZE);
1522            const Layer::State& s(layer->drawingState());
1523            s.transparentRegion.dump(result, "transparentRegion");
1524            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1525            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1526        }
1527
1528        /*
1529         * Dump the layers in the purgatory
1530         */
1531
1532        const size_t purgatorySize =  mLayerPurgatory.size();
1533        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1534        result.append(buffer);
1535        for (size_t i=0 ; i<purgatorySize ; i++) {
1536            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1537            layer->shortDump(result, buffer, SIZE);
1538        }
1539
1540        /*
1541         * Dump SurfaceFlinger global state
1542         */
1543
1544        snprintf(buffer, SIZE, "SurfaceFlinger global state\n");
1545        result.append(buffer);
1546        mWormholeRegion.dump(result, "WormholeRegion");
1547        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1548        snprintf(buffer, SIZE,
1549                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1550                mFreezeDisplay?"yes":"no", mFreezeCount,
1551                mCurrentState.orientation, hw.canDraw());
1552        result.append(buffer);
1553        snprintf(buffer, SIZE,
1554                "  last eglSwapBuffers() time: %f us\n"
1555                "  last transaction time     : %f us\n",
1556                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1557        result.append(buffer);
1558
1559        if (inSwapBuffersDuration || !locked) {
1560            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1561                    inSwapBuffersDuration/1000.0);
1562            result.append(buffer);
1563        }
1564
1565        if (inTransactionDuration || !locked) {
1566            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1567                    inTransactionDuration/1000.0);
1568            result.append(buffer);
1569        }
1570
1571        /*
1572         * Dump HWComposer state
1573         */
1574        HWComposer& hwc(hw.getHwComposer());
1575        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1576                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1577                mDebugDisableHWC ? "disabled" : "enabled");
1578        result.append(buffer);
1579        hwc.dump(result, buffer, SIZE);
1580
1581        /*
1582         * Dump gralloc state
1583         */
1584        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1585        alloc.dump(result);
1586        hw.dump(result);
1587
1588        if (locked) {
1589            mStateLock.unlock();
1590        }
1591    }
1592    write(fd, result.string(), result.size());
1593    return NO_ERROR;
1594}
1595
1596status_t SurfaceFlinger::onTransact(
1597    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1598{
1599    switch (code) {
1600        case CREATE_CONNECTION:
1601        case OPEN_GLOBAL_TRANSACTION:
1602        case CLOSE_GLOBAL_TRANSACTION:
1603        case SET_ORIENTATION:
1604        case FREEZE_DISPLAY:
1605        case UNFREEZE_DISPLAY:
1606        case BOOT_FINISHED:
1607        case TURN_ELECTRON_BEAM_OFF:
1608        case TURN_ELECTRON_BEAM_ON:
1609        {
1610            // codes that require permission check
1611            IPCThreadState* ipc = IPCThreadState::self();
1612            const int pid = ipc->getCallingPid();
1613            const int uid = ipc->getCallingUid();
1614            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1615                LOGE("Permission Denial: "
1616                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1617                return PERMISSION_DENIED;
1618            }
1619            break;
1620        }
1621        case CAPTURE_SCREEN:
1622        {
1623            // codes that require permission check
1624            IPCThreadState* ipc = IPCThreadState::self();
1625            const int pid = ipc->getCallingPid();
1626            const int uid = ipc->getCallingUid();
1627            if ((uid != AID_GRAPHICS) && !mReadFramebuffer.check(pid, uid)) {
1628                LOGE("Permission Denial: "
1629                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1630                return PERMISSION_DENIED;
1631            }
1632            break;
1633        }
1634    }
1635
1636    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1637    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1638        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1639        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1640            IPCThreadState* ipc = IPCThreadState::self();
1641            const int pid = ipc->getCallingPid();
1642            const int uid = ipc->getCallingUid();
1643            LOGE("Permission Denial: "
1644                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1645            return PERMISSION_DENIED;
1646        }
1647        int n;
1648        switch (code) {
1649            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1650            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1651                return NO_ERROR;
1652            case 1002:  // SHOW_UPDATES
1653                n = data.readInt32();
1654                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1655                return NO_ERROR;
1656            case 1003:  // SHOW_BACKGROUND
1657                n = data.readInt32();
1658                mDebugBackground = n ? 1 : 0;
1659                return NO_ERROR;
1660            case 1008:  // toggle use of hw composer
1661                n = data.readInt32();
1662                mDebugDisableHWC = n ? 1 : 0;
1663                invalidateHwcGeometry();
1664                // fall-through...
1665            case 1004:{ // repaint everything
1666                Mutex::Autolock _l(mStateLock);
1667                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1668                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1669                signalEvent();
1670                return NO_ERROR;
1671            }
1672            case 1005:{ // force transaction
1673                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1674                return NO_ERROR;
1675            }
1676            case 1006:{ // enable/disable GraphicLog
1677                int enabled = data.readInt32();
1678                GraphicLog::getInstance().setEnabled(enabled);
1679                return NO_ERROR;
1680            }
1681            case 1007: // set mFreezeCount
1682                mFreezeCount = data.readInt32();
1683                mFreezeDisplayTime = 0;
1684                return NO_ERROR;
1685            case 1010:  // interrogate.
1686                reply->writeInt32(0);
1687                reply->writeInt32(0);
1688                reply->writeInt32(mDebugRegion);
1689                reply->writeInt32(mDebugBackground);
1690                return NO_ERROR;
1691            case 1013: {
1692                Mutex::Autolock _l(mStateLock);
1693                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1694                reply->writeInt32(hw.getPageFlipCount());
1695            }
1696            return NO_ERROR;
1697        }
1698    }
1699    return err;
1700}
1701
1702// ---------------------------------------------------------------------------
1703
1704status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1705        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1706{
1707    if (!GLExtensions::getInstance().haveFramebufferObject())
1708        return INVALID_OPERATION;
1709
1710    // get screen geometry
1711    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1712    const uint32_t hw_w = hw.getWidth();
1713    const uint32_t hw_h = hw.getHeight();
1714    GLfloat u = 1;
1715    GLfloat v = 1;
1716
1717    // make sure to clear all GL error flags
1718    while ( glGetError() != GL_NO_ERROR ) ;
1719
1720    // create a FBO
1721    GLuint name, tname;
1722    glGenTextures(1, &tname);
1723    glBindTexture(GL_TEXTURE_2D, tname);
1724    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1725            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1726    if (glGetError() != GL_NO_ERROR) {
1727        while ( glGetError() != GL_NO_ERROR ) ;
1728        GLint tw = (2 << (31 - clz(hw_w)));
1729        GLint th = (2 << (31 - clz(hw_h)));
1730        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1731                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1732        u = GLfloat(hw_w) / tw;
1733        v = GLfloat(hw_h) / th;
1734    }
1735    glGenFramebuffersOES(1, &name);
1736    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1737    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1738            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1739
1740    // redraw the screen entirely...
1741    glClearColor(0,0,0,1);
1742    glClear(GL_COLOR_BUFFER_BIT);
1743    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1744    const size_t count = layers.size();
1745    for (size_t i=0 ; i<count ; ++i) {
1746        const sp<LayerBase>& layer(layers[i]);
1747        layer->drawForSreenShot();
1748    }
1749
1750    // back to main framebuffer
1751    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1752    glDisable(GL_SCISSOR_TEST);
1753    glDeleteFramebuffersOES(1, &name);
1754
1755    *textureName = tname;
1756    *uOut = u;
1757    *vOut = v;
1758    return NO_ERROR;
1759}
1760
1761// ---------------------------------------------------------------------------
1762
1763status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1764{
1765    status_t result = PERMISSION_DENIED;
1766
1767    if (!GLExtensions::getInstance().haveFramebufferObject())
1768        return INVALID_OPERATION;
1769
1770    // get screen geometry
1771    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1772    const uint32_t hw_w = hw.getWidth();
1773    const uint32_t hw_h = hw.getHeight();
1774    const Region screenBounds(hw.bounds());
1775
1776    GLfloat u, v;
1777    GLuint tname;
1778    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1779    if (result != NO_ERROR) {
1780        return result;
1781    }
1782
1783    GLfloat vtx[8];
1784    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1785    glEnable(GL_TEXTURE_2D);
1786    glBindTexture(GL_TEXTURE_2D, tname);
1787    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1788    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1789    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1790    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1791    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1792    glVertexPointer(2, GL_FLOAT, 0, vtx);
1793
1794    class s_curve_interpolator {
1795        const float nbFrames, s, v;
1796    public:
1797        s_curve_interpolator(int nbFrames, float s)
1798        : nbFrames(1.0f / (nbFrames-1)), s(s),
1799          v(1.0f + expf(-s + 0.5f*s)) {
1800        }
1801        float operator()(int f) {
1802            const float x = f * nbFrames;
1803            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1804        }
1805    };
1806
1807    class v_stretch {
1808        const GLfloat hw_w, hw_h;
1809    public:
1810        v_stretch(uint32_t hw_w, uint32_t hw_h)
1811        : hw_w(hw_w), hw_h(hw_h) {
1812        }
1813        void operator()(GLfloat* vtx, float v) {
1814            const GLfloat w = hw_w + (hw_w * v);
1815            const GLfloat h = hw_h - (hw_h * v);
1816            const GLfloat x = (hw_w - w) * 0.5f;
1817            const GLfloat y = (hw_h - h) * 0.5f;
1818            vtx[0] = x;         vtx[1] = y;
1819            vtx[2] = x;         vtx[3] = y + h;
1820            vtx[4] = x + w;     vtx[5] = y + h;
1821            vtx[6] = x + w;     vtx[7] = y;
1822        }
1823    };
1824
1825    class h_stretch {
1826        const GLfloat hw_w, hw_h;
1827    public:
1828        h_stretch(uint32_t hw_w, uint32_t hw_h)
1829        : hw_w(hw_w), hw_h(hw_h) {
1830        }
1831        void operator()(GLfloat* vtx, float v) {
1832            const GLfloat w = hw_w - (hw_w * v);
1833            const GLfloat h = 1.0f;
1834            const GLfloat x = (hw_w - w) * 0.5f;
1835            const GLfloat y = (hw_h - h) * 0.5f;
1836            vtx[0] = x;         vtx[1] = y;
1837            vtx[2] = x;         vtx[3] = y + h;
1838            vtx[4] = x + w;     vtx[5] = y + h;
1839            vtx[6] = x + w;     vtx[7] = y;
1840        }
1841    };
1842
1843    // the full animation is 24 frames
1844    const int nbFrames = 12;
1845    s_curve_interpolator itr(nbFrames, 7.5f);
1846    s_curve_interpolator itg(nbFrames, 8.0f);
1847    s_curve_interpolator itb(nbFrames, 8.5f);
1848
1849    v_stretch vverts(hw_w, hw_h);
1850    glEnable(GL_BLEND);
1851    glBlendFunc(GL_ONE, GL_ONE);
1852    for (int i=0 ; i<nbFrames ; i++) {
1853        float x, y, w, h;
1854        const float vr = itr(i);
1855        const float vg = itg(i);
1856        const float vb = itb(i);
1857
1858        // clear screen
1859        glColorMask(1,1,1,1);
1860        glClear(GL_COLOR_BUFFER_BIT);
1861        glEnable(GL_TEXTURE_2D);
1862
1863        // draw the red plane
1864        vverts(vtx, vr);
1865        glColorMask(1,0,0,1);
1866        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1867
1868        // draw the green plane
1869        vverts(vtx, vg);
1870        glColorMask(0,1,0,1);
1871        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1872
1873        // draw the blue plane
1874        vverts(vtx, vb);
1875        glColorMask(0,0,1,1);
1876        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1877
1878        // draw the white highlight (we use the last vertices)
1879        glDisable(GL_TEXTURE_2D);
1880        glColorMask(1,1,1,1);
1881        glColor4f(vg, vg, vg, 1);
1882        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1883        hw.flip(screenBounds);
1884    }
1885
1886    h_stretch hverts(hw_w, hw_h);
1887    glDisable(GL_BLEND);
1888    glDisable(GL_TEXTURE_2D);
1889    glColorMask(1,1,1,1);
1890    for (int i=0 ; i<nbFrames ; i++) {
1891        const float v = itg(i);
1892        hverts(vtx, v);
1893        glClear(GL_COLOR_BUFFER_BIT);
1894        glColor4f(1-v, 1-v, 1-v, 1);
1895        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1896        hw.flip(screenBounds);
1897    }
1898
1899    glColorMask(1,1,1,1);
1900    glEnable(GL_SCISSOR_TEST);
1901    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1902    glDeleteTextures(1, &tname);
1903    return NO_ERROR;
1904}
1905
1906status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1907{
1908    status_t result = PERMISSION_DENIED;
1909
1910    if (!GLExtensions::getInstance().haveFramebufferObject())
1911        return INVALID_OPERATION;
1912
1913
1914    // get screen geometry
1915    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1916    const uint32_t hw_w = hw.getWidth();
1917    const uint32_t hw_h = hw.getHeight();
1918    const Region screenBounds(hw.bounds());
1919
1920    GLfloat u, v;
1921    GLuint tname;
1922    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1923    if (result != NO_ERROR) {
1924        return result;
1925    }
1926
1927    // back to main framebuffer
1928    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1929    glDisable(GL_SCISSOR_TEST);
1930
1931    GLfloat vtx[8];
1932    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1933    glEnable(GL_TEXTURE_2D);
1934    glBindTexture(GL_TEXTURE_2D, tname);
1935    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1936    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1937    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1938    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1939    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1940    glVertexPointer(2, GL_FLOAT, 0, vtx);
1941
1942    class s_curve_interpolator {
1943        const float nbFrames, s, v;
1944    public:
1945        s_curve_interpolator(int nbFrames, float s)
1946        : nbFrames(1.0f / (nbFrames-1)), s(s),
1947          v(1.0f + expf(-s + 0.5f*s)) {
1948        }
1949        float operator()(int f) {
1950            const float x = f * nbFrames;
1951            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1952        }
1953    };
1954
1955    class v_stretch {
1956        const GLfloat hw_w, hw_h;
1957    public:
1958        v_stretch(uint32_t hw_w, uint32_t hw_h)
1959        : hw_w(hw_w), hw_h(hw_h) {
1960        }
1961        void operator()(GLfloat* vtx, float v) {
1962            const GLfloat w = hw_w + (hw_w * v);
1963            const GLfloat h = hw_h - (hw_h * v);
1964            const GLfloat x = (hw_w - w) * 0.5f;
1965            const GLfloat y = (hw_h - h) * 0.5f;
1966            vtx[0] = x;         vtx[1] = y;
1967            vtx[2] = x;         vtx[3] = y + h;
1968            vtx[4] = x + w;     vtx[5] = y + h;
1969            vtx[6] = x + w;     vtx[7] = y;
1970        }
1971    };
1972
1973    class h_stretch {
1974        const GLfloat hw_w, hw_h;
1975    public:
1976        h_stretch(uint32_t hw_w, uint32_t hw_h)
1977        : hw_w(hw_w), hw_h(hw_h) {
1978        }
1979        void operator()(GLfloat* vtx, float v) {
1980            const GLfloat w = hw_w - (hw_w * v);
1981            const GLfloat h = 1.0f;
1982            const GLfloat x = (hw_w - w) * 0.5f;
1983            const GLfloat y = (hw_h - h) * 0.5f;
1984            vtx[0] = x;         vtx[1] = y;
1985            vtx[2] = x;         vtx[3] = y + h;
1986            vtx[4] = x + w;     vtx[5] = y + h;
1987            vtx[6] = x + w;     vtx[7] = y;
1988        }
1989    };
1990
1991    // the full animation is 12 frames
1992    int nbFrames = 8;
1993    s_curve_interpolator itr(nbFrames, 7.5f);
1994    s_curve_interpolator itg(nbFrames, 8.0f);
1995    s_curve_interpolator itb(nbFrames, 8.5f);
1996
1997    h_stretch hverts(hw_w, hw_h);
1998    glDisable(GL_BLEND);
1999    glDisable(GL_TEXTURE_2D);
2000    glColorMask(1,1,1,1);
2001    for (int i=nbFrames-1 ; i>=0 ; i--) {
2002        const float v = itg(i);
2003        hverts(vtx, v);
2004        glClear(GL_COLOR_BUFFER_BIT);
2005        glColor4f(1-v, 1-v, 1-v, 1);
2006        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2007        hw.flip(screenBounds);
2008    }
2009
2010    nbFrames = 4;
2011    v_stretch vverts(hw_w, hw_h);
2012    glEnable(GL_BLEND);
2013    glBlendFunc(GL_ONE, GL_ONE);
2014    for (int i=nbFrames-1 ; i>=0 ; i--) {
2015        float x, y, w, h;
2016        const float vr = itr(i);
2017        const float vg = itg(i);
2018        const float vb = itb(i);
2019
2020        // clear screen
2021        glColorMask(1,1,1,1);
2022        glClear(GL_COLOR_BUFFER_BIT);
2023        glEnable(GL_TEXTURE_2D);
2024
2025        // draw the red plane
2026        vverts(vtx, vr);
2027        glColorMask(1,0,0,1);
2028        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2029
2030        // draw the green plane
2031        vverts(vtx, vg);
2032        glColorMask(0,1,0,1);
2033        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2034
2035        // draw the blue plane
2036        vverts(vtx, vb);
2037        glColorMask(0,0,1,1);
2038        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2039
2040        hw.flip(screenBounds);
2041    }
2042
2043    glColorMask(1,1,1,1);
2044    glEnable(GL_SCISSOR_TEST);
2045    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2046    glDeleteTextures(1, &tname);
2047
2048    return NO_ERROR;
2049}
2050
2051// ---------------------------------------------------------------------------
2052
2053status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2054{
2055    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2056    if (!hw.canDraw()) {
2057        // we're already off
2058        return NO_ERROR;
2059    }
2060    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2061        electronBeamOffAnimationImplLocked();
2062    }
2063
2064    // always clear the whole screen at the end of the animation
2065    glClearColor(0,0,0,1);
2066    glDisable(GL_SCISSOR_TEST);
2067    glClear(GL_COLOR_BUFFER_BIT);
2068    glEnable(GL_SCISSOR_TEST);
2069    hw.flip( Region(hw.bounds()) );
2070
2071    hw.setCanDraw(false);
2072    return NO_ERROR;
2073}
2074
2075status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2076{
2077    class MessageTurnElectronBeamOff : public MessageBase {
2078        SurfaceFlinger* flinger;
2079        int32_t mode;
2080        status_t result;
2081    public:
2082        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2083            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2084        }
2085        status_t getResult() const {
2086            return result;
2087        }
2088        virtual bool handler() {
2089            Mutex::Autolock _l(flinger->mStateLock);
2090            result = flinger->turnElectronBeamOffImplLocked(mode);
2091            return true;
2092        }
2093    };
2094
2095    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2096    status_t res = postMessageSync(msg);
2097    if (res == NO_ERROR) {
2098        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2099
2100        // work-around: when the power-manager calls us we activate the
2101        // animation. eventually, the "on" animation will be called
2102        // by the power-manager itself
2103        mElectronBeamAnimationMode = mode;
2104    }
2105    return res;
2106}
2107
2108// ---------------------------------------------------------------------------
2109
2110status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2111{
2112    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2113    if (hw.canDraw()) {
2114        // we're already on
2115        return NO_ERROR;
2116    }
2117    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2118        electronBeamOnAnimationImplLocked();
2119    }
2120    hw.setCanDraw(true);
2121
2122    // make sure to redraw the whole screen when the animation is done
2123    mDirtyRegion.set(hw.bounds());
2124    signalEvent();
2125
2126    return NO_ERROR;
2127}
2128
2129status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2130{
2131    class MessageTurnElectronBeamOn : public MessageBase {
2132        SurfaceFlinger* flinger;
2133        int32_t mode;
2134        status_t result;
2135    public:
2136        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2137            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2138        }
2139        status_t getResult() const {
2140            return result;
2141        }
2142        virtual bool handler() {
2143            Mutex::Autolock _l(flinger->mStateLock);
2144            result = flinger->turnElectronBeamOnImplLocked(mode);
2145            return true;
2146        }
2147    };
2148
2149    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2150    return NO_ERROR;
2151}
2152
2153// ---------------------------------------------------------------------------
2154
2155status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2156        sp<IMemoryHeap>* heap,
2157        uint32_t* w, uint32_t* h, PixelFormat* f,
2158        uint32_t sw, uint32_t sh,
2159        uint32_t minLayerZ, uint32_t maxLayerZ)
2160{
2161    status_t result = PERMISSION_DENIED;
2162
2163    // only one display supported for now
2164    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2165        return BAD_VALUE;
2166
2167    // make sure none of the layers are protected
2168    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2169    const size_t count = layers.size();
2170    for (size_t i=0 ; i<count ; ++i) {
2171        const sp<LayerBase>& layer(layers[i]);
2172        const uint32_t z = layer->drawingState().z;
2173        if (z >= minLayerZ && z <= maxLayerZ) {
2174            if (layer->isProtected()) {
2175                return INVALID_OPERATION;
2176            }
2177        }
2178    }
2179
2180    if (!GLExtensions::getInstance().haveFramebufferObject())
2181        return INVALID_OPERATION;
2182
2183    // get screen geometry
2184    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2185    const uint32_t hw_w = hw.getWidth();
2186    const uint32_t hw_h = hw.getHeight();
2187
2188    if ((sw > hw_w) || (sh > hw_h))
2189        return BAD_VALUE;
2190
2191    sw = (!sw) ? hw_w : sw;
2192    sh = (!sh) ? hw_h : sh;
2193    const size_t size = sw * sh * 4;
2194
2195    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2196    //        sw, sh, minLayerZ, maxLayerZ);
2197
2198    // make sure to clear all GL error flags
2199    while ( glGetError() != GL_NO_ERROR ) ;
2200
2201    // create a FBO
2202    GLuint name, tname;
2203    glGenRenderbuffersOES(1, &tname);
2204    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2205    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2206    glGenFramebuffersOES(1, &name);
2207    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2208    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2209            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2210
2211    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2212
2213    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2214
2215        // invert everything, b/c glReadPixel() below will invert the FB
2216        glViewport(0, 0, sw, sh);
2217        glScissor(0, 0, sw, sh);
2218        glMatrixMode(GL_PROJECTION);
2219        glPushMatrix();
2220        glLoadIdentity();
2221        glOrthof(0, hw_w, 0, hw_h, 0, 1);
2222        glMatrixMode(GL_MODELVIEW);
2223
2224        // redraw the screen entirely...
2225        glClearColor(0,0,0,1);
2226        glClear(GL_COLOR_BUFFER_BIT);
2227
2228        for (size_t i=0 ; i<count ; ++i) {
2229            const sp<LayerBase>& layer(layers[i]);
2230            const uint32_t z = layer->drawingState().z;
2231            if (z >= minLayerZ && z <= maxLayerZ) {
2232                layer->drawForSreenShot();
2233            }
2234        }
2235
2236        // XXX: this is needed on tegra
2237        glScissor(0, 0, sw, sh);
2238
2239        // check for errors and return screen capture
2240        if (glGetError() != GL_NO_ERROR) {
2241            // error while rendering
2242            result = INVALID_OPERATION;
2243        } else {
2244            // allocate shared memory large enough to hold the
2245            // screen capture
2246            sp<MemoryHeapBase> base(
2247                    new MemoryHeapBase(size, 0, "screen-capture") );
2248            void* const ptr = base->getBase();
2249            if (ptr) {
2250                // capture the screen with glReadPixels()
2251                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2252                if (glGetError() == GL_NO_ERROR) {
2253                    *heap = base;
2254                    *w = sw;
2255                    *h = sh;
2256                    *f = PIXEL_FORMAT_RGBA_8888;
2257                    result = NO_ERROR;
2258                }
2259            } else {
2260                result = NO_MEMORY;
2261            }
2262        }
2263        glEnable(GL_SCISSOR_TEST);
2264        glViewport(0, 0, hw_w, hw_h);
2265        glMatrixMode(GL_PROJECTION);
2266        glPopMatrix();
2267        glMatrixMode(GL_MODELVIEW);
2268    } else {
2269        result = BAD_VALUE;
2270    }
2271
2272    // release FBO resources
2273    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2274    glDeleteRenderbuffersOES(1, &tname);
2275    glDeleteFramebuffersOES(1, &name);
2276
2277    hw.compositionComplete();
2278
2279    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2280
2281    return result;
2282}
2283
2284
2285status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2286        sp<IMemoryHeap>* heap,
2287        uint32_t* width, uint32_t* height, PixelFormat* format,
2288        uint32_t sw, uint32_t sh,
2289        uint32_t minLayerZ, uint32_t maxLayerZ)
2290{
2291    // only one display supported for now
2292    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2293        return BAD_VALUE;
2294
2295    if (!GLExtensions::getInstance().haveFramebufferObject())
2296        return INVALID_OPERATION;
2297
2298    class MessageCaptureScreen : public MessageBase {
2299        SurfaceFlinger* flinger;
2300        DisplayID dpy;
2301        sp<IMemoryHeap>* heap;
2302        uint32_t* w;
2303        uint32_t* h;
2304        PixelFormat* f;
2305        uint32_t sw;
2306        uint32_t sh;
2307        uint32_t minLayerZ;
2308        uint32_t maxLayerZ;
2309        status_t result;
2310    public:
2311        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2312                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2313                uint32_t sw, uint32_t sh,
2314                uint32_t minLayerZ, uint32_t maxLayerZ)
2315            : flinger(flinger), dpy(dpy),
2316              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2317              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2318              result(PERMISSION_DENIED)
2319        {
2320        }
2321        status_t getResult() const {
2322            return result;
2323        }
2324        virtual bool handler() {
2325            Mutex::Autolock _l(flinger->mStateLock);
2326
2327            // if we have secure windows, never allow the screen capture
2328            if (flinger->mSecureFrameBuffer)
2329                return true;
2330
2331            result = flinger->captureScreenImplLocked(dpy,
2332                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2333
2334            return true;
2335        }
2336    };
2337
2338    sp<MessageBase> msg = new MessageCaptureScreen(this,
2339            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2340    status_t res = postMessageSync(msg);
2341    if (res == NO_ERROR) {
2342        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2343    }
2344    return res;
2345}
2346
2347// ---------------------------------------------------------------------------
2348
2349sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2350{
2351    sp<Layer> result;
2352    Mutex::Autolock _l(mStateLock);
2353    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2354    return result;
2355}
2356
2357// ---------------------------------------------------------------------------
2358
2359Client::Client(const sp<SurfaceFlinger>& flinger)
2360    : mFlinger(flinger), mNameGenerator(1)
2361{
2362}
2363
2364Client::~Client()
2365{
2366    const size_t count = mLayers.size();
2367    for (size_t i=0 ; i<count ; i++) {
2368        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2369        if (layer != 0) {
2370            mFlinger->removeLayer(layer);
2371        }
2372    }
2373}
2374
2375status_t Client::initCheck() const {
2376    return NO_ERROR;
2377}
2378
2379size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2380{
2381    Mutex::Autolock _l(mLock);
2382    size_t name = mNameGenerator++;
2383    mLayers.add(name, layer);
2384    return name;
2385}
2386
2387void Client::detachLayer(const LayerBaseClient* layer)
2388{
2389    Mutex::Autolock _l(mLock);
2390    // we do a linear search here, because this doesn't happen often
2391    const size_t count = mLayers.size();
2392    for (size_t i=0 ; i<count ; i++) {
2393        if (mLayers.valueAt(i) == layer) {
2394            mLayers.removeItemsAt(i, 1);
2395            break;
2396        }
2397    }
2398}
2399sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2400{
2401    Mutex::Autolock _l(mLock);
2402    sp<LayerBaseClient> lbc;
2403    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2404    if (layer != 0) {
2405        lbc = layer.promote();
2406        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2407    }
2408    return lbc;
2409}
2410
2411sp<IMemoryHeap> Client::getControlBlock() const {
2412    return 0;
2413}
2414ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
2415    return -1;
2416}
2417sp<ISurface> Client::createSurface(
2418        ISurfaceComposerClient::surface_data_t* params,
2419        const String8& name,
2420        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2421        uint32_t flags)
2422{
2423    return mFlinger->createSurface(params, name, this,
2424            display, w, h, format, flags);
2425}
2426status_t Client::destroySurface(SurfaceID sid) {
2427    return mFlinger->removeSurface(this, sid);
2428}
2429status_t Client::setState(int32_t count, const layer_state_t* states) {
2430    return mFlinger->setClientState(this, count, states);
2431}
2432
2433// ---------------------------------------------------------------------------
2434
2435UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
2436    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
2437{
2438    const int pgsize = getpagesize();
2439    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
2440
2441    mCblkHeap = new MemoryHeapBase(cblksize, 0,
2442            "SurfaceFlinger Client control-block");
2443
2444    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
2445    if (ctrlblk) { // construct the shared structure in-place.
2446        new(ctrlblk) SharedClient;
2447    }
2448}
2449
2450UserClient::~UserClient()
2451{
2452    if (ctrlblk) {
2453        ctrlblk->~SharedClient();  // destroy our shared-structure.
2454    }
2455
2456    /*
2457     * When a UserClient dies, it's unclear what to do exactly.
2458     * We could go ahead and destroy all surfaces linked to that client
2459     * however, it wouldn't be fair to the main Client
2460     * (usually the the window-manager), which might want to re-target
2461     * the layer to another UserClient.
2462     * I think the best is to do nothing, or not much; in most cases the
2463     * WM itself will go ahead and clean things up when it detects a client of
2464     * his has died.
2465     * The remaining question is what to display? currently we keep
2466     * just keep the current buffer.
2467     */
2468}
2469
2470status_t UserClient::initCheck() const {
2471    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
2472}
2473
2474void UserClient::detachLayer(const Layer* layer)
2475{
2476    int32_t name = layer->getToken();
2477    if (name >= 0) {
2478        int32_t mask = 1LU<<name;
2479        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
2480            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
2481        }
2482    }
2483}
2484
2485sp<IMemoryHeap> UserClient::getControlBlock() const {
2486    return mCblkHeap;
2487}
2488
2489ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
2490{
2491    int32_t name = NAME_NOT_FOUND;
2492    sp<Layer> layer(mFlinger->getLayer(sur));
2493    if (layer == 0) {
2494        return name;
2495    }
2496
2497    // if this layer already has a token, just return it
2498    name = layer->getToken();
2499    if ((name >= 0) && (layer->getClient() == this)) {
2500        return name;
2501    }
2502
2503    name = 0;
2504    do {
2505        int32_t mask = 1LU<<name;
2506        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
2507            // we found and locked that name
2508            status_t err = layer->setToken(
2509                    const_cast<UserClient*>(this), ctrlblk, name);
2510            if (err != NO_ERROR) {
2511                // free the name
2512                android_atomic_and(~mask, &mBitmap);
2513                name = err;
2514            }
2515            break;
2516        }
2517        if (++name >= int32_t(SharedBufferStack::NUM_LAYERS_MAX))
2518            name = NO_MEMORY;
2519    } while(name >= 0);
2520
2521    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
2522    //        sur->asBinder().get(), name, this, mBitmap);
2523    return name;
2524}
2525
2526sp<ISurface> UserClient::createSurface(
2527        ISurfaceComposerClient::surface_data_t* params,
2528        const String8& name,
2529        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2530        uint32_t flags) {
2531    return 0;
2532}
2533status_t UserClient::destroySurface(SurfaceID sid) {
2534    return INVALID_OPERATION;
2535}
2536status_t UserClient::setState(int32_t count, const layer_state_t* states) {
2537    return INVALID_OPERATION;
2538}
2539
2540// ---------------------------------------------------------------------------
2541
2542GraphicBufferAlloc::GraphicBufferAlloc() {}
2543
2544GraphicBufferAlloc::~GraphicBufferAlloc() {}
2545
2546sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2547        PixelFormat format, uint32_t usage) {
2548    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2549    status_t err = graphicBuffer->initCheck();
2550    if (err != 0) {
2551        LOGE("createGraphicBuffer: init check failed: %d", err);
2552        return 0;
2553    } else if (graphicBuffer->handle == 0) {
2554        LOGE("createGraphicBuffer: unable to create GraphicBuffer");
2555        return 0;
2556    }
2557    return graphicBuffer;
2558}
2559
2560// ---------------------------------------------------------------------------
2561
2562GraphicPlane::GraphicPlane()
2563    : mHw(0)
2564{
2565}
2566
2567GraphicPlane::~GraphicPlane() {
2568    delete mHw;
2569}
2570
2571bool GraphicPlane::initialized() const {
2572    return mHw ? true : false;
2573}
2574
2575int GraphicPlane::getWidth() const {
2576    return mWidth;
2577}
2578
2579int GraphicPlane::getHeight() const {
2580    return mHeight;
2581}
2582
2583void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2584{
2585    mHw = hw;
2586
2587    // initialize the display orientation transform.
2588    // it's a constant that should come from the display driver.
2589    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2590    char property[PROPERTY_VALUE_MAX];
2591    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2592        //displayOrientation
2593        switch (atoi(property)) {
2594        case 90:
2595            displayOrientation = ISurfaceComposer::eOrientation90;
2596            break;
2597        case 270:
2598            displayOrientation = ISurfaceComposer::eOrientation270;
2599            break;
2600        }
2601    }
2602
2603    const float w = hw->getWidth();
2604    const float h = hw->getHeight();
2605    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2606            &mDisplayTransform);
2607    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2608        mDisplayWidth = h;
2609        mDisplayHeight = w;
2610    } else {
2611        mDisplayWidth = w;
2612        mDisplayHeight = h;
2613    }
2614
2615    setOrientation(ISurfaceComposer::eOrientationDefault);
2616}
2617
2618status_t GraphicPlane::orientationToTransfrom(
2619        int orientation, int w, int h, Transform* tr)
2620{
2621    uint32_t flags = 0;
2622    switch (orientation) {
2623    case ISurfaceComposer::eOrientationDefault:
2624        flags = Transform::ROT_0;
2625        break;
2626    case ISurfaceComposer::eOrientation90:
2627        flags = Transform::ROT_90;
2628        break;
2629    case ISurfaceComposer::eOrientation180:
2630        flags = Transform::ROT_180;
2631        break;
2632    case ISurfaceComposer::eOrientation270:
2633        flags = Transform::ROT_270;
2634        break;
2635    default:
2636        return BAD_VALUE;
2637    }
2638    tr->set(flags, w, h);
2639    return NO_ERROR;
2640}
2641
2642status_t GraphicPlane::setOrientation(int orientation)
2643{
2644    // If the rotation can be handled in hardware, this is where
2645    // the magic should happen.
2646
2647    const DisplayHardware& hw(displayHardware());
2648    const float w = mDisplayWidth;
2649    const float h = mDisplayHeight;
2650    mWidth = int(w);
2651    mHeight = int(h);
2652
2653    Transform orientationTransform;
2654    GraphicPlane::orientationToTransfrom(orientation, w, h,
2655            &orientationTransform);
2656    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2657        mWidth = int(h);
2658        mHeight = int(w);
2659    }
2660
2661    mOrientation = orientation;
2662    mGlobalTransform = mDisplayTransform * orientationTransform;
2663    return NO_ERROR;
2664}
2665
2666const DisplayHardware& GraphicPlane::displayHardware() const {
2667    return *mHw;
2668}
2669
2670DisplayHardware& GraphicPlane::editDisplayHardware() {
2671    return *mHw;
2672}
2673
2674const Transform& GraphicPlane::transform() const {
2675    return mGlobalTransform;
2676}
2677
2678EGLDisplay GraphicPlane::getEGLDisplay() const {
2679    return mHw->getEGLDisplay();
2680}
2681
2682// ---------------------------------------------------------------------------
2683
2684}; // namespace android
2685