SurfaceFlinger.cpp revision 0656a68380d01de4136933901b2c322cf9ab0d7e 
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#include <binder/PermissionCache.h>
36
37#include <utils/String8.h>
38#include <utils/String16.h>
39#include <utils/StopWatch.h>
40
41#include <ui/GraphicBufferAllocator.h>
42#include <ui/GraphicLog.h>
43#include <ui/PixelFormat.h>
44
45#include <pixelflinger/pixelflinger.h>
46#include <GLES/gl.h>
47
48#include "clz.h"
49#include "GLExtensions.h"
50#include "DdmConnection.h"
51#include "Layer.h"
52#include "LayerDim.h"
53#include "SurfaceFlinger.h"
54
55#include "DisplayHardware/DisplayHardware.h"
56#include "DisplayHardware/HWComposer.h"
57
58#include <private/surfaceflinger/SharedBufferStack.h>
59
60/* ideally AID_GRAPHICS would be in a semi-public header
61 * or there would be a way to map a user/group name to its id
62 */
63#ifndef AID_GRAPHICS
64#define AID_GRAPHICS 1003
65#endif
66
67#define DISPLAY_COUNT       1
68
69namespace android {
70// ---------------------------------------------------------------------------
71
72const String16 sHardwareTest("android.permission.HARDWARE_TEST");
73const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
74const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
75const String16 sDump("android.permission.DUMP");
76
77// ---------------------------------------------------------------------------
78
79SurfaceFlinger::SurfaceFlinger()
80    :   BnSurfaceComposer(), Thread(false),
81        mTransactionFlags(0),
82        mResizeTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mDeferReleaseConsole(false),
88        mFreezeDisplay(false),
89        mElectronBeamAnimationMode(0),
90        mFreezeCount(0),
91        mFreezeDisplayTime(0),
92        mDebugRegion(0),
93        mDebugBackground(0),
94        mDebugDDMS(0),
95        mDebugDisableHWC(0),
96        mDebugDisableTransformHint(0),
97        mDebugInSwapBuffers(0),
98        mLastSwapBufferTime(0),
99        mDebugInTransaction(0),
100        mLastTransactionTime(0),
101        mBootFinished(false),
102        mConsoleSignals(0),
103        mSecureFrameBuffer(0)
104{
105    init();
106}
107
108void SurfaceFlinger::init()
109{
110    LOGI("SurfaceFlinger is starting");
111
112    // debugging stuff...
113    char value[PROPERTY_VALUE_MAX];
114
115    property_get("debug.sf.showupdates", value, "0");
116    mDebugRegion = atoi(value);
117
118    property_get("debug.sf.showbackground", value, "0");
119    mDebugBackground = atoi(value);
120
121    property_get("debug.sf.ddms", value, "0");
122    mDebugDDMS = atoi(value);
123    if (mDebugDDMS) {
124        DdmConnection::start(getServiceName());
125    }
126
127    LOGI_IF(mDebugRegion,       "showupdates enabled");
128    LOGI_IF(mDebugBackground,   "showbackground enabled");
129    LOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
130}
131
132SurfaceFlinger::~SurfaceFlinger()
133{
134    glDeleteTextures(1, &mWormholeTexName);
135}
136
137sp<IMemoryHeap> SurfaceFlinger::getCblk() const
138{
139    return mServerHeap;
140}
141
142sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
143{
144    sp<ISurfaceComposerClient> bclient;
145    sp<Client> client(new Client(this));
146    status_t err = client->initCheck();
147    if (err == NO_ERROR) {
148        bclient = client;
149    }
150    return bclient;
151}
152
153sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
154{
155    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
156    return gba;
157}
158
159const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
160{
161    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
162    const GraphicPlane& plane(mGraphicPlanes[dpy]);
163    return plane;
164}
165
166GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
167{
168    return const_cast<GraphicPlane&>(
169        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
170}
171
172void SurfaceFlinger::bootFinished()
173{
174    const nsecs_t now = systemTime();
175    const nsecs_t duration = now - mBootTime;
176    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
177    mBootFinished = true;
178
179    // wait patiently for the window manager death
180    const String16 name("window");
181    sp<IBinder> window(defaultServiceManager()->getService(name));
182    if (window != 0) {
183        window->linkToDeath(this);
184    }
185
186    // stop boot animation
187    property_set("ctl.stop", "bootanim");
188}
189
190void SurfaceFlinger::binderDied(const wp<IBinder>& who)
191{
192    // the window manager died on us. prepare its eulogy.
193
194    // unfreeze the screen in case it was... frozen
195    mFreezeDisplayTime = 0;
196    mFreezeCount = 0;
197    mFreezeDisplay = false;
198
199    // reset screen orientation
200    setOrientation(0, eOrientationDefault, 0);
201
202    // restart the boot-animation
203    property_set("ctl.start", "bootanim");
204}
205
206void SurfaceFlinger::onFirstRef()
207{
208    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
209
210    // Wait for the main thread to be done with its initialization
211    mReadyToRunBarrier.wait();
212}
213
214static inline uint16_t pack565(int r, int g, int b) {
215    return (r<<11)|(g<<5)|b;
216}
217
218status_t SurfaceFlinger::readyToRun()
219{
220    LOGI(   "SurfaceFlinger's main thread ready to run. "
221            "Initializing graphics H/W...");
222
223    // we only support one display currently
224    int dpy = 0;
225
226    {
227        // initialize the main display
228        GraphicPlane& plane(graphicPlane(dpy));
229        DisplayHardware* const hw = new DisplayHardware(this, dpy);
230        plane.setDisplayHardware(hw);
231    }
232
233    // create the shared control-block
234    mServerHeap = new MemoryHeapBase(4096,
235            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
236    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
237
238    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
239    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
240
241    new(mServerCblk) surface_flinger_cblk_t;
242
243    // initialize primary screen
244    // (other display should be initialized in the same manner, but
245    // asynchronously, as they could come and go. None of this is supported
246    // yet).
247    const GraphicPlane& plane(graphicPlane(dpy));
248    const DisplayHardware& hw = plane.displayHardware();
249    const uint32_t w = hw.getWidth();
250    const uint32_t h = hw.getHeight();
251    const uint32_t f = hw.getFormat();
252    hw.makeCurrent();
253
254    // initialize the shared control block
255    mServerCblk->connected |= 1<<dpy;
256    display_cblk_t* dcblk = mServerCblk->displays + dpy;
257    memset(dcblk, 0, sizeof(display_cblk_t));
258    dcblk->w            = plane.getWidth();
259    dcblk->h            = plane.getHeight();
260    dcblk->format       = f;
261    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
262    dcblk->xdpi         = hw.getDpiX();
263    dcblk->ydpi         = hw.getDpiY();
264    dcblk->fps          = hw.getRefreshRate();
265    dcblk->density      = hw.getDensity();
266
267    // Initialize OpenGL|ES
268    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
269    glPixelStorei(GL_PACK_ALIGNMENT, 4);
270    glEnableClientState(GL_VERTEX_ARRAY);
271    glEnable(GL_SCISSOR_TEST);
272    glShadeModel(GL_FLAT);
273    glDisable(GL_DITHER);
274    glDisable(GL_CULL_FACE);
275
276    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
277    const uint16_t g1 = pack565(0x17,0x2f,0x17);
278    const uint16_t textureData[4] = { g0, g1, g1, g0 };
279    glGenTextures(1, &mWormholeTexName);
280    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
284    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
285    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
286            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
287
288    glViewport(0, 0, w, h);
289    glMatrixMode(GL_PROJECTION);
290    glLoadIdentity();
291    // put the origin in the left-bottom corner
292    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
293
294    mReadyToRunBarrier.open();
295
296    /*
297     *  We're now ready to accept clients...
298     */
299
300    // start boot animation
301    property_set("ctl.start", "bootanim");
302
303    return NO_ERROR;
304}
305
306// ----------------------------------------------------------------------------
307#if 0
308#pragma mark -
309#pragma mark Events Handler
310#endif
311
312void SurfaceFlinger::waitForEvent()
313{
314    while (true) {
315        nsecs_t timeout = -1;
316        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
317        if (UNLIKELY(isFrozen())) {
318            // wait 5 seconds
319            const nsecs_t now = systemTime();
320            if (mFreezeDisplayTime == 0) {
321                mFreezeDisplayTime = now;
322            }
323            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
324            timeout = waitTime>0 ? waitTime : 0;
325        }
326
327        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
328
329        // see if we timed out
330        if (isFrozen()) {
331            const nsecs_t now = systemTime();
332            nsecs_t frozenTime = (now - mFreezeDisplayTime);
333            if (frozenTime >= freezeDisplayTimeout) {
334                // we timed out and are still frozen
335                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
336                        mFreezeDisplay, mFreezeCount);
337                mFreezeDisplayTime = 0;
338                mFreezeCount = 0;
339                mFreezeDisplay = false;
340            }
341        }
342
343        if (msg != 0) {
344            switch (msg->what) {
345                case MessageQueue::INVALIDATE:
346                    // invalidate message, just return to the main loop
347                    return;
348            }
349        }
350    }
351}
352
353void SurfaceFlinger::signalEvent() {
354    mEventQueue.invalidate();
355}
356
357bool SurfaceFlinger::authenticateSurfaceTexture(
358        const sp<ISurfaceTexture>& surfaceTexture) const {
359    Mutex::Autolock _l(mStateLock);
360    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
361
362    // Check the visible layer list for the ISurface
363    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
364    size_t count = currentLayers.size();
365    for (size_t i=0 ; i<count ; i++) {
366        const sp<LayerBase>& layer(currentLayers[i]);
367        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
368        if (lbc != NULL) {
369            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
370            if (lbcBinder == surfaceTextureBinder) {
371                return true;
372            }
373        }
374    }
375
376    // Check the layers in the purgatory.  This check is here so that if a
377    // SurfaceTexture gets destroyed before all the clients are done using it,
378    // the error will not be reported as "surface XYZ is not authenticated", but
379    // will instead fail later on when the client tries to use the surface,
380    // which should be reported as "surface XYZ returned an -ENODEV".  The
381    // purgatorized layers are no less authentic than the visible ones, so this
382    // should not cause any harm.
383    size_t purgatorySize =  mLayerPurgatory.size();
384    for (size_t i=0 ; i<purgatorySize ; i++) {
385        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
386        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
387        if (lbc != NULL) {
388            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
389            if (lbcBinder == surfaceTextureBinder) {
390                return true;
391            }
392        }
393    }
394
395    return false;
396}
397
398status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
399        nsecs_t reltime, uint32_t flags)
400{
401    return mEventQueue.postMessage(msg, reltime, flags);
402}
403
404status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
405        nsecs_t reltime, uint32_t flags)
406{
407    status_t res = mEventQueue.postMessage(msg, reltime, flags);
408    if (res == NO_ERROR) {
409        msg->wait();
410    }
411    return res;
412}
413
414// ----------------------------------------------------------------------------
415#if 0
416#pragma mark -
417#pragma mark Main loop
418#endif
419
420bool SurfaceFlinger::threadLoop()
421{
422    waitForEvent();
423
424    // check for transactions
425    if (UNLIKELY(mConsoleSignals)) {
426        handleConsoleEvents();
427    }
428
429    // if we're in a global transaction, don't do anything.
430    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
431    uint32_t transactionFlags = peekTransactionFlags(mask);
432    if (UNLIKELY(transactionFlags)) {
433        handleTransaction(transactionFlags);
434    }
435
436    // post surfaces (if needed)
437    handlePageFlip();
438
439    if (UNLIKELY(mHwWorkListDirty)) {
440        // build the h/w work list
441        handleWorkList();
442    }
443
444    const DisplayHardware& hw(graphicPlane(0).displayHardware());
445    if (LIKELY(hw.canDraw() && !isFrozen())) {
446        // repaint the framebuffer (if needed)
447
448        const int index = hw.getCurrentBufferIndex();
449        GraphicLog& logger(GraphicLog::getInstance());
450
451        logger.log(GraphicLog::SF_REPAINT, index);
452        handleRepaint();
453
454        // inform the h/w that we're done compositing
455        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
456        hw.compositionComplete();
457
458        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
459        postFramebuffer();
460
461        logger.log(GraphicLog::SF_REPAINT_DONE, index);
462    } else {
463        // pretend we did the post
464        hw.compositionComplete();
465        usleep(16667); // 60 fps period
466    }
467    return true;
468}
469
470void SurfaceFlinger::postFramebuffer()
471{
472    if (!mSwapRegion.isEmpty()) {
473        const DisplayHardware& hw(graphicPlane(0).displayHardware());
474        const nsecs_t now = systemTime();
475        mDebugInSwapBuffers = now;
476        hw.flip(mSwapRegion);
477        mLastSwapBufferTime = systemTime() - now;
478        mDebugInSwapBuffers = 0;
479        mSwapRegion.clear();
480    }
481}
482
483void SurfaceFlinger::handleConsoleEvents()
484{
485    // something to do with the console
486    const DisplayHardware& hw = graphicPlane(0).displayHardware();
487
488    int what = android_atomic_and(0, &mConsoleSignals);
489    if (what & eConsoleAcquired) {
490        hw.acquireScreen();
491        // this is a temporary work-around, eventually this should be called
492        // by the power-manager
493        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
494    }
495
496    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
497        // We got the release signal before the acquire signal
498        mDeferReleaseConsole = false;
499        hw.releaseScreen();
500    }
501
502    if (what & eConsoleReleased) {
503        if (hw.isScreenAcquired()) {
504            hw.releaseScreen();
505        } else {
506            mDeferReleaseConsole = true;
507        }
508    }
509
510    mDirtyRegion.set(hw.bounds());
511}
512
513void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
514{
515    Mutex::Autolock _l(mStateLock);
516    const nsecs_t now = systemTime();
517    mDebugInTransaction = now;
518
519    // Here we're guaranteed that some transaction flags are set
520    // so we can call handleTransactionLocked() unconditionally.
521    // We call getTransactionFlags(), which will also clear the flags,
522    // with mStateLock held to guarantee that mCurrentState won't change
523    // until the transaction is committed.
524
525    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
526    transactionFlags = getTransactionFlags(mask);
527    handleTransactionLocked(transactionFlags);
528
529    mLastTransactionTime = systemTime() - now;
530    mDebugInTransaction = 0;
531    invalidateHwcGeometry();
532    // here the transaction has been committed
533}
534
535void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
536{
537    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
538    const size_t count = currentLayers.size();
539
540    /*
541     * Traversal of the children
542     * (perform the transaction for each of them if needed)
543     */
544
545    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
546    if (layersNeedTransaction) {
547        for (size_t i=0 ; i<count ; i++) {
548            const sp<LayerBase>& layer = currentLayers[i];
549            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
550            if (!trFlags) continue;
551
552            const uint32_t flags = layer->doTransaction(0);
553            if (flags & Layer::eVisibleRegion)
554                mVisibleRegionsDirty = true;
555        }
556    }
557
558    /*
559     * Perform our own transaction if needed
560     */
561
562    if (transactionFlags & eTransactionNeeded) {
563        if (mCurrentState.orientation != mDrawingState.orientation) {
564            // the orientation has changed, recompute all visible regions
565            // and invalidate everything.
566
567            const int dpy = 0;
568            const int orientation = mCurrentState.orientation;
569            const uint32_t type = mCurrentState.orientationType;
570            GraphicPlane& plane(graphicPlane(dpy));
571            plane.setOrientation(orientation);
572
573            // update the shared control block
574            const DisplayHardware& hw(plane.displayHardware());
575            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
576            dcblk->orientation = orientation;
577            dcblk->w = plane.getWidth();
578            dcblk->h = plane.getHeight();
579
580            mVisibleRegionsDirty = true;
581            mDirtyRegion.set(hw.bounds());
582        }
583
584        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
585            // freezing or unfreezing the display -> trigger animation if needed
586            mFreezeDisplay = mCurrentState.freezeDisplay;
587            if (mFreezeDisplay)
588                 mFreezeDisplayTime = 0;
589        }
590
591        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
592            // layers have been added
593            mVisibleRegionsDirty = true;
594        }
595
596        // some layers might have been removed, so
597        // we need to update the regions they're exposing.
598        if (mLayersRemoved) {
599            mLayersRemoved = false;
600            mVisibleRegionsDirty = true;
601            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
602            const size_t count = previousLayers.size();
603            for (size_t i=0 ; i<count ; i++) {
604                const sp<LayerBase>& layer(previousLayers[i]);
605                if (currentLayers.indexOf( layer ) < 0) {
606                    // this layer is not visible anymore
607                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
608                }
609            }
610        }
611    }
612
613    commitTransaction();
614}
615
616sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
617{
618    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
619}
620
621void SurfaceFlinger::computeVisibleRegions(
622    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
623{
624    const GraphicPlane& plane(graphicPlane(0));
625    const Transform& planeTransform(plane.transform());
626    const DisplayHardware& hw(plane.displayHardware());
627    const Region screenRegion(hw.bounds());
628
629    Region aboveOpaqueLayers;
630    Region aboveCoveredLayers;
631    Region dirty;
632
633    bool secureFrameBuffer = false;
634
635    size_t i = currentLayers.size();
636    while (i--) {
637        const sp<LayerBase>& layer = currentLayers[i];
638        layer->validateVisibility(planeTransform);
639
640        // start with the whole surface at its current location
641        const Layer::State& s(layer->drawingState());
642
643        /*
644         * opaqueRegion: area of a surface that is fully opaque.
645         */
646        Region opaqueRegion;
647
648        /*
649         * visibleRegion: area of a surface that is visible on screen
650         * and not fully transparent. This is essentially the layer's
651         * footprint minus the opaque regions above it.
652         * Areas covered by a translucent surface are considered visible.
653         */
654        Region visibleRegion;
655
656        /*
657         * coveredRegion: area of a surface that is covered by all
658         * visible regions above it (which includes the translucent areas).
659         */
660        Region coveredRegion;
661
662
663        // handle hidden surfaces by setting the visible region to empty
664        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
665            const bool translucent = !layer->isOpaque();
666            const Rect bounds(layer->visibleBounds());
667            visibleRegion.set(bounds);
668            visibleRegion.andSelf(screenRegion);
669            if (!visibleRegion.isEmpty()) {
670                // Remove the transparent area from the visible region
671                if (translucent) {
672                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
673                }
674
675                // compute the opaque region
676                const int32_t layerOrientation = layer->getOrientation();
677                if (s.alpha==255 && !translucent &&
678                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
679                    // the opaque region is the layer's footprint
680                    opaqueRegion = visibleRegion;
681                }
682            }
683        }
684
685        // Clip the covered region to the visible region
686        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
687
688        // Update aboveCoveredLayers for next (lower) layer
689        aboveCoveredLayers.orSelf(visibleRegion);
690
691        // subtract the opaque region covered by the layers above us
692        visibleRegion.subtractSelf(aboveOpaqueLayers);
693
694        // compute this layer's dirty region
695        if (layer->contentDirty) {
696            // we need to invalidate the whole region
697            dirty = visibleRegion;
698            // as well, as the old visible region
699            dirty.orSelf(layer->visibleRegionScreen);
700            layer->contentDirty = false;
701        } else {
702            /* compute the exposed region:
703             *   the exposed region consists of two components:
704             *   1) what's VISIBLE now and was COVERED before
705             *   2) what's EXPOSED now less what was EXPOSED before
706             *
707             * note that (1) is conservative, we start with the whole
708             * visible region but only keep what used to be covered by
709             * something -- which mean it may have been exposed.
710             *
711             * (2) handles areas that were not covered by anything but got
712             * exposed because of a resize.
713             */
714            const Region newExposed = visibleRegion - coveredRegion;
715            const Region oldVisibleRegion = layer->visibleRegionScreen;
716            const Region oldCoveredRegion = layer->coveredRegionScreen;
717            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
718            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
719        }
720        dirty.subtractSelf(aboveOpaqueLayers);
721
722        // accumulate to the screen dirty region
723        dirtyRegion.orSelf(dirty);
724
725        // Update aboveOpaqueLayers for next (lower) layer
726        aboveOpaqueLayers.orSelf(opaqueRegion);
727
728        // Store the visible region is screen space
729        layer->setVisibleRegion(visibleRegion);
730        layer->setCoveredRegion(coveredRegion);
731
732        // If a secure layer is partially visible, lock-down the screen!
733        if (layer->isSecure() && !visibleRegion.isEmpty()) {
734            secureFrameBuffer = true;
735        }
736    }
737
738    // invalidate the areas where a layer was removed
739    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
740    mDirtyRegionRemovedLayer.clear();
741
742    mSecureFrameBuffer = secureFrameBuffer;
743    opaqueRegion = aboveOpaqueLayers;
744}
745
746
747void SurfaceFlinger::commitTransaction()
748{
749    mDrawingState = mCurrentState;
750    mResizeTransationPending = false;
751    mTransactionCV.broadcast();
752}
753
754void SurfaceFlinger::handlePageFlip()
755{
756    bool visibleRegions = mVisibleRegionsDirty;
757    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
758    visibleRegions |= lockPageFlip(currentLayers);
759
760        const DisplayHardware& hw = graphicPlane(0).displayHardware();
761        const Region screenRegion(hw.bounds());
762        if (visibleRegions) {
763            Region opaqueRegion;
764            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
765
766            /*
767             *  rebuild the visible layer list
768             */
769            const size_t count = currentLayers.size();
770            mVisibleLayersSortedByZ.clear();
771            mVisibleLayersSortedByZ.setCapacity(count);
772            for (size_t i=0 ; i<count ; i++) {
773                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
774                    mVisibleLayersSortedByZ.add(currentLayers[i]);
775            }
776
777            mWormholeRegion = screenRegion.subtract(opaqueRegion);
778            mVisibleRegionsDirty = false;
779            invalidateHwcGeometry();
780        }
781
782    unlockPageFlip(currentLayers);
783    mDirtyRegion.andSelf(screenRegion);
784}
785
786void SurfaceFlinger::invalidateHwcGeometry()
787{
788    mHwWorkListDirty = true;
789}
790
791bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
792{
793    bool recomputeVisibleRegions = false;
794    size_t count = currentLayers.size();
795    sp<LayerBase> const* layers = currentLayers.array();
796    for (size_t i=0 ; i<count ; i++) {
797        const sp<LayerBase>& layer(layers[i]);
798        layer->lockPageFlip(recomputeVisibleRegions);
799    }
800    return recomputeVisibleRegions;
801}
802
803void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
804{
805    const GraphicPlane& plane(graphicPlane(0));
806    const Transform& planeTransform(plane.transform());
807    size_t count = currentLayers.size();
808    sp<LayerBase> const* layers = currentLayers.array();
809    for (size_t i=0 ; i<count ; i++) {
810        const sp<LayerBase>& layer(layers[i]);
811        layer->unlockPageFlip(planeTransform, mDirtyRegion);
812    }
813}
814
815void SurfaceFlinger::handleWorkList()
816{
817    mHwWorkListDirty = false;
818    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
819    if (hwc.initCheck() == NO_ERROR) {
820        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
821        const size_t count = currentLayers.size();
822        hwc.createWorkList(count);
823        hwc_layer_t* const cur(hwc.getLayers());
824        for (size_t i=0 ; cur && i<count ; i++) {
825            currentLayers[i]->setGeometry(&cur[i]);
826            if (mDebugDisableHWC || mDebugRegion) {
827                cur[i].compositionType = HWC_FRAMEBUFFER;
828                cur[i].flags |= HWC_SKIP_LAYER;
829            }
830        }
831    }
832}
833
834void SurfaceFlinger::handleRepaint()
835{
836    // compute the invalid region
837    mSwapRegion.orSelf(mDirtyRegion);
838
839    if (UNLIKELY(mDebugRegion)) {
840        debugFlashRegions();
841    }
842
843    // set the frame buffer
844    const DisplayHardware& hw(graphicPlane(0).displayHardware());
845    glMatrixMode(GL_MODELVIEW);
846    glLoadIdentity();
847
848    uint32_t flags = hw.getFlags();
849    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
850        (flags & DisplayHardware::BUFFER_PRESERVED))
851    {
852        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
853        // takes a rectangle, we must make sure to update that whole
854        // rectangle in that case
855        if (flags & DisplayHardware::SWAP_RECTANGLE) {
856            // TODO: we really should be able to pass a region to
857            // SWAP_RECTANGLE so that we don't have to redraw all this.
858            mDirtyRegion.set(mSwapRegion.bounds());
859        } else {
860            // in the BUFFER_PRESERVED case, obviously, we can update only
861            // what's needed and nothing more.
862            // NOTE: this is NOT a common case, as preserving the backbuffer
863            // is costly and usually involves copying the whole update back.
864        }
865    } else {
866        if (flags & DisplayHardware::PARTIAL_UPDATES) {
867            // We need to redraw the rectangle that will be updated
868            // (pushed to the framebuffer).
869            // This is needed because PARTIAL_UPDATES only takes one
870            // rectangle instead of a region (see DisplayHardware::flip())
871            mDirtyRegion.set(mSwapRegion.bounds());
872        } else {
873            // we need to redraw everything (the whole screen)
874            mDirtyRegion.set(hw.bounds());
875            mSwapRegion = mDirtyRegion;
876        }
877    }
878
879    Region expandDirty = setupHardwareComposer(mDirtyRegion);
880    mDirtyRegion.orSelf(expandDirty);
881    mSwapRegion.orSelf(mDirtyRegion);
882    composeSurfaces(mDirtyRegion);
883
884    // clear the dirty regions
885    mDirtyRegion.clear();
886}
887
888Region SurfaceFlinger::setupHardwareComposer(const Region& dirty)
889{
890    Region dirtyOut(dirty);
891
892    const DisplayHardware& hw(graphicPlane(0).displayHardware());
893    HWComposer& hwc(hw.getHwComposer());
894    hwc_layer_t* const cur(hwc.getLayers());
895    if (!cur) {
896        return dirtyOut;
897    }
898
899    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
900    size_t count = layers.size();
901
902    LOGE_IF(hwc.getNumLayers() != count,
903            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
904            hwc.getNumLayers(), count);
905
906    // just to be extra-safe, use the smallest count
907    if (hwc.initCheck() == NO_ERROR) {
908        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
909    }
910
911    /*
912     *  update the per-frame h/w composer data for each layer
913     *  and build the transparent region of the FB
914     */
915    for (size_t i=0 ; i<count ; i++) {
916        const sp<LayerBase>& layer(layers[i]);
917        layer->setPerFrameData(&cur[i]);
918    }
919    status_t err = hwc.prepare();
920    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
921
922    if (err == NO_ERROR) {
923        Region transparent;
924        for (size_t i=0 ; i<count ; i++) {
925            // what's happening here is tricky.
926            // we want to clear all the layers with the CLEAR_FB flags
927            // that are opaque.
928            // however, since some GPU are efficient at preserving
929            // the backbuffer, we want to take advantage of that so we do the
930            // clear only in the dirty region (other areas will be preserved
931            // on those GPUs).
932            //   NOTE: on non backbuffer preserving GPU, the dirty region
933            //   has already been expanded as needed, so the code is correct
934            //   there too.
935            // However, the content of the framebuffer cannot be trusted when
936            // we switch to/from FB/OVERLAY, in which case we need to
937            // expand the dirty region to those areas too.
938            //
939            // Also we want to make sure to not clear areas that belong to
940            // layers above that won't redraw (we would just erasing them),
941            // that is, we can't erase anything outside the dirty region.
942
943            const sp<LayerBase>& layer(layers[i]);
944            if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
945                transparent.orSelf(layer->visibleRegionScreen);
946            }
947
948            bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER) &&
949                !(cur[i].flags & HWC_SKIP_LAYER);
950
951            if (isOverlay != layer->isOverlay()) {
952                // we transitioned to/from overlay, so add this layer
953                // to the dirty region so the framebuffer can be either
954                // cleared or redrawn.
955                dirtyOut.orSelf(layer->visibleRegionScreen);
956            }
957            layer->setOverlay(isOverlay);
958        }
959
960
961        /*
962         *  clear the area of the FB that need to be transparent
963         */
964        // don't erase stuff outside the dirty region
965        transparent.andSelf(dirtyOut);
966        if (!transparent.isEmpty()) {
967            glClearColor(0,0,0,0);
968            Region::const_iterator it = transparent.begin();
969            Region::const_iterator const end = transparent.end();
970            const int32_t height = hw.getHeight();
971            while (it != end) {
972                const Rect& r(*it++);
973                const GLint sy = height - (r.top + r.height());
974                glScissor(r.left, sy, r.width(), r.height());
975                glClear(GL_COLOR_BUFFER_BIT);
976            }
977        }
978    }
979    return dirtyOut;
980}
981
982void SurfaceFlinger::composeSurfaces(const Region& dirty)
983{
984    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
985        // should never happen unless the window manager has a bug
986        // draw something...
987        drawWormhole();
988    }
989
990    const DisplayHardware& hw(graphicPlane(0).displayHardware());
991    HWComposer& hwc(hw.getHwComposer());
992    hwc_layer_t* const cur(hwc.getLayers());
993
994    /*
995     * and then, render the layers targeted at the framebuffer
996     */
997    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
998    size_t count = layers.size();
999    for (size_t i=0 ; i<count ; i++) {
1000        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER) &&
1001                !(cur[i].flags & HWC_SKIP_LAYER)) {
1002            continue;
1003        }
1004        const sp<LayerBase>& layer(layers[i]);
1005        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1006        if (!clip.isEmpty()) {
1007            layer->draw(clip);
1008        }
1009    }
1010}
1011
1012void SurfaceFlinger::debugFlashRegions()
1013{
1014    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1015    const uint32_t flags = hw.getFlags();
1016    const int32_t height = hw.getHeight();
1017    if (mSwapRegion.isEmpty()) {
1018        return;
1019    }
1020
1021    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1022            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1023        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1024                mDirtyRegion.bounds() : hw.bounds());
1025        composeSurfaces(repaint);
1026    }
1027
1028    glDisable(GL_BLEND);
1029    glDisable(GL_DITHER);
1030    glDisable(GL_SCISSOR_TEST);
1031
1032    static int toggle = 0;
1033    toggle = 1 - toggle;
1034    if (toggle) {
1035        glColor4f(1, 0, 1, 1);
1036    } else {
1037        glColor4f(1, 1, 0, 1);
1038    }
1039
1040    Region::const_iterator it = mDirtyRegion.begin();
1041    Region::const_iterator const end = mDirtyRegion.end();
1042    while (it != end) {
1043        const Rect& r = *it++;
1044        GLfloat vertices[][2] = {
1045                { r.left,  height - r.top },
1046                { r.left,  height - r.bottom },
1047                { r.right, height - r.bottom },
1048                { r.right, height - r.top }
1049        };
1050        glVertexPointer(2, GL_FLOAT, 0, vertices);
1051        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1052    }
1053
1054    hw.flip(mSwapRegion);
1055
1056    if (mDebugRegion > 1)
1057        usleep(mDebugRegion * 1000);
1058
1059    glEnable(GL_SCISSOR_TEST);
1060}
1061
1062void SurfaceFlinger::drawWormhole() const
1063{
1064    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1065    if (region.isEmpty())
1066        return;
1067
1068    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1069    const int32_t width = hw.getWidth();
1070    const int32_t height = hw.getHeight();
1071
1072    glDisable(GL_BLEND);
1073    glDisable(GL_DITHER);
1074
1075    if (LIKELY(!mDebugBackground)) {
1076        glClearColor(0,0,0,0);
1077        Region::const_iterator it = region.begin();
1078        Region::const_iterator const end = region.end();
1079        while (it != end) {
1080            const Rect& r = *it++;
1081            const GLint sy = height - (r.top + r.height());
1082            glScissor(r.left, sy, r.width(), r.height());
1083            glClear(GL_COLOR_BUFFER_BIT);
1084        }
1085    } else {
1086        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1087                { width, height }, { 0, height }  };
1088        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1089        glVertexPointer(2, GL_SHORT, 0, vertices);
1090        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1091        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1092#if defined(GL_OES_EGL_image_external)
1093        if (GLExtensions::getInstance().haveTextureExternal()) {
1094            glDisable(GL_TEXTURE_EXTERNAL_OES);
1095        }
1096#endif
1097        glEnable(GL_TEXTURE_2D);
1098        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1099        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1100        glMatrixMode(GL_TEXTURE);
1101        glLoadIdentity();
1102        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1103        Region::const_iterator it = region.begin();
1104        Region::const_iterator const end = region.end();
1105        while (it != end) {
1106            const Rect& r = *it++;
1107            const GLint sy = height - (r.top + r.height());
1108            glScissor(r.left, sy, r.width(), r.height());
1109            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1110        }
1111        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1112        glDisable(GL_TEXTURE_2D);
1113        glLoadIdentity();
1114        glMatrixMode(GL_MODELVIEW);
1115    }
1116}
1117
1118void SurfaceFlinger::debugShowFPS() const
1119{
1120    static int mFrameCount;
1121    static int mLastFrameCount = 0;
1122    static nsecs_t mLastFpsTime = 0;
1123    static float mFps = 0;
1124    mFrameCount++;
1125    nsecs_t now = systemTime();
1126    nsecs_t diff = now - mLastFpsTime;
1127    if (diff > ms2ns(250)) {
1128        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1129        mLastFpsTime = now;
1130        mLastFrameCount = mFrameCount;
1131    }
1132    // XXX: mFPS has the value we want
1133 }
1134
1135status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1136{
1137    Mutex::Autolock _l(mStateLock);
1138    addLayer_l(layer);
1139    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1140    return NO_ERROR;
1141}
1142
1143status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1144{
1145    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1146    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1147}
1148
1149ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1150        const sp<LayerBaseClient>& lbc)
1151{
1152    // attach this layer to the client
1153    size_t name = client->attachLayer(lbc);
1154
1155    Mutex::Autolock _l(mStateLock);
1156
1157    // add this layer to the current state list
1158    addLayer_l(lbc);
1159
1160    return ssize_t(name);
1161}
1162
1163status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1164{
1165    Mutex::Autolock _l(mStateLock);
1166    status_t err = purgatorizeLayer_l(layer);
1167    if (err == NO_ERROR)
1168        setTransactionFlags(eTransactionNeeded);
1169    return err;
1170}
1171
1172status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1173{
1174    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1175    if (lbc != 0) {
1176        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1177    }
1178    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1179    if (index >= 0) {
1180        mLayersRemoved = true;
1181        return NO_ERROR;
1182    }
1183    return status_t(index);
1184}
1185
1186status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1187{
1188    // First add the layer to the purgatory list, which makes sure it won't
1189    // go away, then remove it from the main list (through a transaction).
1190    ssize_t err = removeLayer_l(layerBase);
1191    if (err >= 0) {
1192        mLayerPurgatory.add(layerBase);
1193    }
1194
1195    layerBase->onRemoved();
1196
1197    // it's possible that we don't find a layer, because it might
1198    // have been destroyed already -- this is not technically an error
1199    // from the user because there is a race between Client::destroySurface(),
1200    // ~Client() and ~ISurface().
1201    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1202}
1203
1204status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1205{
1206    layer->forceVisibilityTransaction();
1207    setTransactionFlags(eTraversalNeeded);
1208    return NO_ERROR;
1209}
1210
1211uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1212{
1213    return android_atomic_release_load(&mTransactionFlags);
1214}
1215
1216uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1217{
1218    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1219}
1220
1221uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1222{
1223    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1224    if ((old & flags)==0) { // wake the server up
1225        signalEvent();
1226    }
1227    return old;
1228}
1229
1230
1231void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state) {
1232    Mutex::Autolock _l(mStateLock);
1233
1234    uint32_t flags = 0;
1235    const size_t count = state.size();
1236    for (size_t i=0 ; i<count ; i++) {
1237        const ComposerState& s(state[i]);
1238        sp<Client> client( static_cast<Client *>(s.client.get()) );
1239        flags |= setClientStateLocked(client, s.state);
1240    }
1241    if (flags) {
1242        setTransactionFlags(flags);
1243    }
1244
1245    signalEvent();
1246
1247    // if there is a transaction with a resize, wait for it to
1248    // take effect before returning.
1249    while (mResizeTransationPending) {
1250        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1251        if (CC_UNLIKELY(err != NO_ERROR)) {
1252            // just in case something goes wrong in SF, return to the
1253            // called after a few seconds.
1254            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1255            mResizeTransationPending = false;
1256            break;
1257        }
1258    }
1259}
1260
1261status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1262{
1263    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1264        return BAD_VALUE;
1265
1266    Mutex::Autolock _l(mStateLock);
1267    mCurrentState.freezeDisplay = 1;
1268    setTransactionFlags(eTransactionNeeded);
1269
1270    // flags is intended to communicate some sort of animation behavior
1271    // (for instance fading)
1272    return NO_ERROR;
1273}
1274
1275status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1276{
1277    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1278        return BAD_VALUE;
1279
1280    Mutex::Autolock _l(mStateLock);
1281    mCurrentState.freezeDisplay = 0;
1282    setTransactionFlags(eTransactionNeeded);
1283
1284    // flags is intended to communicate some sort of animation behavior
1285    // (for instance fading)
1286    return NO_ERROR;
1287}
1288
1289int SurfaceFlinger::setOrientation(DisplayID dpy,
1290        int orientation, uint32_t flags)
1291{
1292    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1293        return BAD_VALUE;
1294
1295    Mutex::Autolock _l(mStateLock);
1296    if (mCurrentState.orientation != orientation) {
1297        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1298            mCurrentState.orientationType = flags;
1299            mCurrentState.orientation = orientation;
1300            setTransactionFlags(eTransactionNeeded);
1301            mTransactionCV.wait(mStateLock);
1302        } else {
1303            orientation = BAD_VALUE;
1304        }
1305    }
1306    return orientation;
1307}
1308
1309sp<ISurface> SurfaceFlinger::createSurface(
1310        ISurfaceComposerClient::surface_data_t* params,
1311        const String8& name,
1312        const sp<Client>& client,
1313        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1314        uint32_t flags)
1315{
1316    sp<LayerBaseClient> layer;
1317    sp<ISurface> surfaceHandle;
1318
1319    if (int32_t(w|h) < 0) {
1320        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1321                int(w), int(h));
1322        return surfaceHandle;
1323    }
1324
1325    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1326    sp<Layer> normalLayer;
1327    switch (flags & eFXSurfaceMask) {
1328        case eFXSurfaceNormal:
1329            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1330            layer = normalLayer;
1331            break;
1332        case eFXSurfaceBlur:
1333            // for now we treat Blur as Dim, until we can implement it
1334            // efficiently.
1335        case eFXSurfaceDim:
1336            layer = createDimSurface(client, d, w, h, flags);
1337            break;
1338    }
1339
1340    if (layer != 0) {
1341        layer->initStates(w, h, flags);
1342        layer->setName(name);
1343        ssize_t token = addClientLayer(client, layer);
1344
1345        surfaceHandle = layer->getSurface();
1346        if (surfaceHandle != 0) {
1347            params->token = token;
1348            params->identity = layer->getIdentity();
1349            if (normalLayer != 0) {
1350                Mutex::Autolock _l(mStateLock);
1351                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1352            }
1353        }
1354
1355        setTransactionFlags(eTransactionNeeded);
1356    }
1357
1358    return surfaceHandle;
1359}
1360
1361sp<Layer> SurfaceFlinger::createNormalSurface(
1362        const sp<Client>& client, DisplayID display,
1363        uint32_t w, uint32_t h, uint32_t flags,
1364        PixelFormat& format)
1365{
1366    // initialize the surfaces
1367    switch (format) { // TODO: take h/w into account
1368    case PIXEL_FORMAT_TRANSPARENT:
1369    case PIXEL_FORMAT_TRANSLUCENT:
1370        format = PIXEL_FORMAT_RGBA_8888;
1371        break;
1372    case PIXEL_FORMAT_OPAQUE:
1373#ifdef NO_RGBX_8888
1374        format = PIXEL_FORMAT_RGB_565;
1375#else
1376        format = PIXEL_FORMAT_RGBX_8888;
1377#endif
1378        break;
1379    }
1380
1381#ifdef NO_RGBX_8888
1382    if (format == PIXEL_FORMAT_RGBX_8888)
1383        format = PIXEL_FORMAT_RGBA_8888;
1384#endif
1385
1386    sp<Layer> layer = new Layer(this, display, client);
1387    status_t err = layer->setBuffers(w, h, format, flags);
1388    if (LIKELY(err != NO_ERROR)) {
1389        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1390        layer.clear();
1391    }
1392    return layer;
1393}
1394
1395sp<LayerDim> SurfaceFlinger::createDimSurface(
1396        const sp<Client>& client, DisplayID display,
1397        uint32_t w, uint32_t h, uint32_t flags)
1398{
1399    sp<LayerDim> layer = new LayerDim(this, display, client);
1400    layer->initStates(w, h, flags);
1401    return layer;
1402}
1403
1404status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1405{
1406    /*
1407     * called by the window manager, when a surface should be marked for
1408     * destruction.
1409     *
1410     * The surface is removed from the current and drawing lists, but placed
1411     * in the purgatory queue, so it's not destroyed right-away (we need
1412     * to wait for all client's references to go away first).
1413     */
1414
1415    status_t err = NAME_NOT_FOUND;
1416    Mutex::Autolock _l(mStateLock);
1417    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1418    if (layer != 0) {
1419        err = purgatorizeLayer_l(layer);
1420        if (err == NO_ERROR) {
1421            setTransactionFlags(eTransactionNeeded);
1422        }
1423    }
1424    return err;
1425}
1426
1427status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1428{
1429    // called by ~ISurface() when all references are gone
1430    status_t err = NO_ERROR;
1431    sp<LayerBaseClient> l(layer.promote());
1432    if (l != NULL) {
1433        Mutex::Autolock _l(mStateLock);
1434        err = removeLayer_l(l);
1435        if (err == NAME_NOT_FOUND) {
1436            // The surface wasn't in the current list, which means it was
1437            // removed already, which means it is in the purgatory,
1438            // and need to be removed from there.
1439            ssize_t idx = mLayerPurgatory.remove(l);
1440            LOGE_IF(idx < 0,
1441                    "layer=%p is not in the purgatory list", l.get());
1442        }
1443        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1444                "error removing layer=%p (%s)", l.get(), strerror(-err));
1445    }
1446    return err;
1447}
1448
1449uint32_t SurfaceFlinger::setClientStateLocked(
1450        const sp<Client>& client,
1451        const layer_state_t& s)
1452{
1453    uint32_t flags = 0;
1454    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1455    if (layer != 0) {
1456        const uint32_t what = s.what;
1457        if (what & ePositionChanged) {
1458            if (layer->setPosition(s.x, s.y))
1459                flags |= eTraversalNeeded;
1460        }
1461        if (what & eLayerChanged) {
1462            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1463            if (layer->setLayer(s.z)) {
1464                mCurrentState.layersSortedByZ.removeAt(idx);
1465                mCurrentState.layersSortedByZ.add(layer);
1466                // we need traversal (state changed)
1467                // AND transaction (list changed)
1468                flags |= eTransactionNeeded|eTraversalNeeded;
1469            }
1470        }
1471        if (what & eSizeChanged) {
1472            if (layer->setSize(s.w, s.h)) {
1473                flags |= eTraversalNeeded;
1474                mResizeTransationPending = true;
1475            }
1476        }
1477        if (what & eAlphaChanged) {
1478            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1479                flags |= eTraversalNeeded;
1480        }
1481        if (what & eMatrixChanged) {
1482            if (layer->setMatrix(s.matrix))
1483                flags |= eTraversalNeeded;
1484        }
1485        if (what & eTransparentRegionChanged) {
1486            if (layer->setTransparentRegionHint(s.transparentRegion))
1487                flags |= eTraversalNeeded;
1488        }
1489        if (what & eVisibilityChanged) {
1490            if (layer->setFlags(s.flags, s.mask))
1491                flags |= eTraversalNeeded;
1492        }
1493    }
1494    return flags;
1495}
1496
1497void SurfaceFlinger::screenReleased(int dpy)
1498{
1499    // this may be called by a signal handler, we can't do too much in here
1500    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1501    signalEvent();
1502}
1503
1504void SurfaceFlinger::screenAcquired(int dpy)
1505{
1506    // this may be called by a signal handler, we can't do too much in here
1507    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1508    signalEvent();
1509}
1510
1511status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1512{
1513    const size_t SIZE = 4096;
1514    char buffer[SIZE];
1515    String8 result;
1516
1517    if (!PermissionCache::checkCallingPermission(sDump)) {
1518        snprintf(buffer, SIZE, "Permission Denial: "
1519                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1520                IPCThreadState::self()->getCallingPid(),
1521                IPCThreadState::self()->getCallingUid());
1522        result.append(buffer);
1523    } else {
1524
1525        // figure out if we're stuck somewhere
1526        const nsecs_t now = systemTime();
1527        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1528        const nsecs_t inTransaction(mDebugInTransaction);
1529        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1530        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1531
1532        // Try to get the main lock, but don't insist if we can't
1533        // (this would indicate SF is stuck, but we want to be able to
1534        // print something in dumpsys).
1535        int retry = 3;
1536        while (mStateLock.tryLock()<0 && --retry>=0) {
1537            usleep(1000000);
1538        }
1539        const bool locked(retry >= 0);
1540        if (!locked) {
1541            snprintf(buffer, SIZE,
1542                    "SurfaceFlinger appears to be unresponsive, "
1543                    "dumping anyways (no locks held)\n");
1544            result.append(buffer);
1545        }
1546
1547        /*
1548         * Dump the visible layer list
1549         */
1550        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1551        const size_t count = currentLayers.size();
1552        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1553        result.append(buffer);
1554        for (size_t i=0 ; i<count ; i++) {
1555            const sp<LayerBase>& layer(currentLayers[i]);
1556            layer->dump(result, buffer, SIZE);
1557            const Layer::State& s(layer->drawingState());
1558            s.transparentRegion.dump(result, "transparentRegion");
1559            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1560            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1561        }
1562
1563        /*
1564         * Dump the layers in the purgatory
1565         */
1566
1567        const size_t purgatorySize =  mLayerPurgatory.size();
1568        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1569        result.append(buffer);
1570        for (size_t i=0 ; i<purgatorySize ; i++) {
1571            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1572            layer->shortDump(result, buffer, SIZE);
1573        }
1574
1575        /*
1576         * Dump SurfaceFlinger global state
1577         */
1578
1579        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1580        result.append(buffer);
1581
1582        const GLExtensions& extensions(GLExtensions::getInstance());
1583        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1584                extensions.getVendor(),
1585                extensions.getRenderer(),
1586                extensions.getVersion());
1587        result.append(buffer);
1588        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1589        result.append(buffer);
1590
1591        mWormholeRegion.dump(result, "WormholeRegion");
1592        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1593        snprintf(buffer, SIZE,
1594                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1595                mFreezeDisplay?"yes":"no", mFreezeCount,
1596                mCurrentState.orientation, hw.canDraw());
1597        result.append(buffer);
1598        snprintf(buffer, SIZE,
1599                "  last eglSwapBuffers() time: %f us\n"
1600                "  last transaction time     : %f us\n",
1601                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1602        result.append(buffer);
1603
1604        if (inSwapBuffersDuration || !locked) {
1605            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1606                    inSwapBuffersDuration/1000.0);
1607            result.append(buffer);
1608        }
1609
1610        if (inTransactionDuration || !locked) {
1611            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1612                    inTransactionDuration/1000.0);
1613            result.append(buffer);
1614        }
1615
1616        /*
1617         * Dump HWComposer state
1618         */
1619        HWComposer& hwc(hw.getHwComposer());
1620        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1621                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1622                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1623        result.append(buffer);
1624        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1625
1626        /*
1627         * Dump gralloc state
1628         */
1629        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1630        alloc.dump(result);
1631        hw.dump(result);
1632
1633        if (locked) {
1634            mStateLock.unlock();
1635        }
1636    }
1637    write(fd, result.string(), result.size());
1638    return NO_ERROR;
1639}
1640
1641status_t SurfaceFlinger::onTransact(
1642    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1643{
1644    switch (code) {
1645        case CREATE_CONNECTION:
1646        case SET_TRANSACTION_STATE:
1647        case SET_ORIENTATION:
1648        case FREEZE_DISPLAY:
1649        case UNFREEZE_DISPLAY:
1650        case BOOT_FINISHED:
1651        case TURN_ELECTRON_BEAM_OFF:
1652        case TURN_ELECTRON_BEAM_ON:
1653        {
1654            // codes that require permission check
1655            IPCThreadState* ipc = IPCThreadState::self();
1656            const int pid = ipc->getCallingPid();
1657            const int uid = ipc->getCallingUid();
1658            if ((uid != AID_GRAPHICS) &&
1659                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1660                LOGE("Permission Denial: "
1661                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1662                return PERMISSION_DENIED;
1663            }
1664            break;
1665        }
1666        case CAPTURE_SCREEN:
1667        {
1668            // codes that require permission check
1669            IPCThreadState* ipc = IPCThreadState::self();
1670            const int pid = ipc->getCallingPid();
1671            const int uid = ipc->getCallingUid();
1672            if ((uid != AID_GRAPHICS) &&
1673                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1674                LOGE("Permission Denial: "
1675                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1676                return PERMISSION_DENIED;
1677            }
1678            break;
1679        }
1680    }
1681
1682    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1683    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1684        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1685        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1686            IPCThreadState* ipc = IPCThreadState::self();
1687            const int pid = ipc->getCallingPid();
1688            const int uid = ipc->getCallingUid();
1689            LOGE("Permission Denial: "
1690                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1691            return PERMISSION_DENIED;
1692        }
1693        int n;
1694        switch (code) {
1695            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1696            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1697                return NO_ERROR;
1698            case 1002:  // SHOW_UPDATES
1699                n = data.readInt32();
1700                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1701                invalidateHwcGeometry();
1702                repaintEverything();
1703                return NO_ERROR;
1704            case 1003:  // SHOW_BACKGROUND
1705                n = data.readInt32();
1706                mDebugBackground = n ? 1 : 0;
1707                return NO_ERROR;
1708            case 1004:{ // repaint everything
1709                repaintEverything();
1710                return NO_ERROR;
1711            }
1712            case 1005:{ // force transaction
1713                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1714                return NO_ERROR;
1715            }
1716            case 1006:{ // enable/disable GraphicLog
1717                int enabled = data.readInt32();
1718                GraphicLog::getInstance().setEnabled(enabled);
1719                return NO_ERROR;
1720            }
1721            case 1007: // set mFreezeCount
1722                mFreezeCount = data.readInt32();
1723                mFreezeDisplayTime = 0;
1724                return NO_ERROR;
1725            case 1008:  // toggle use of hw composer
1726                n = data.readInt32();
1727                mDebugDisableHWC = n ? 1 : 0;
1728                invalidateHwcGeometry();
1729                repaintEverything();
1730                return NO_ERROR;
1731            case 1009:  // toggle use of transform hint
1732                n = data.readInt32();
1733                mDebugDisableTransformHint = n ? 1 : 0;
1734                invalidateHwcGeometry();
1735                repaintEverything();
1736                return NO_ERROR;
1737            case 1010:  // interrogate.
1738                reply->writeInt32(0);
1739                reply->writeInt32(0);
1740                reply->writeInt32(mDebugRegion);
1741                reply->writeInt32(mDebugBackground);
1742                return NO_ERROR;
1743            case 1013: {
1744                Mutex::Autolock _l(mStateLock);
1745                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1746                reply->writeInt32(hw.getPageFlipCount());
1747            }
1748            return NO_ERROR;
1749        }
1750    }
1751    return err;
1752}
1753
1754void SurfaceFlinger::repaintEverything() {
1755    Mutex::Autolock _l(mStateLock);
1756    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1757    mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1758    signalEvent();
1759}
1760
1761// ---------------------------------------------------------------------------
1762
1763status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1764        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1765{
1766    if (!GLExtensions::getInstance().haveFramebufferObject())
1767        return INVALID_OPERATION;
1768
1769    // get screen geometry
1770    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1771    const uint32_t hw_w = hw.getWidth();
1772    const uint32_t hw_h = hw.getHeight();
1773    GLfloat u = 1;
1774    GLfloat v = 1;
1775
1776    // make sure to clear all GL error flags
1777    while ( glGetError() != GL_NO_ERROR ) ;
1778
1779    // create a FBO
1780    GLuint name, tname;
1781    glGenTextures(1, &tname);
1782    glBindTexture(GL_TEXTURE_2D, tname);
1783    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1784            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1785    if (glGetError() != GL_NO_ERROR) {
1786        while ( glGetError() != GL_NO_ERROR ) ;
1787        GLint tw = (2 << (31 - clz(hw_w)));
1788        GLint th = (2 << (31 - clz(hw_h)));
1789        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1790                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1791        u = GLfloat(hw_w) / tw;
1792        v = GLfloat(hw_h) / th;
1793    }
1794    glGenFramebuffersOES(1, &name);
1795    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1796    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1797            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1798
1799    // redraw the screen entirely...
1800    glClearColor(0,0,0,1);
1801    glClear(GL_COLOR_BUFFER_BIT);
1802    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1803    const size_t count = layers.size();
1804    for (size_t i=0 ; i<count ; ++i) {
1805        const sp<LayerBase>& layer(layers[i]);
1806        layer->drawForSreenShot();
1807    }
1808
1809    // back to main framebuffer
1810    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1811    glDisable(GL_SCISSOR_TEST);
1812    glDeleteFramebuffersOES(1, &name);
1813
1814    *textureName = tname;
1815    *uOut = u;
1816    *vOut = v;
1817    return NO_ERROR;
1818}
1819
1820// ---------------------------------------------------------------------------
1821
1822status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1823{
1824    status_t result = PERMISSION_DENIED;
1825
1826    if (!GLExtensions::getInstance().haveFramebufferObject())
1827        return INVALID_OPERATION;
1828
1829    // get screen geometry
1830    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1831    const uint32_t hw_w = hw.getWidth();
1832    const uint32_t hw_h = hw.getHeight();
1833    const Region screenBounds(hw.bounds());
1834
1835    GLfloat u, v;
1836    GLuint tname;
1837    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1838    if (result != NO_ERROR) {
1839        return result;
1840    }
1841
1842    GLfloat vtx[8];
1843    const GLfloat texCoords[4][2] = { {0,1}, {0,1-v}, {u,1-v}, {u,1} };
1844    glBindTexture(GL_TEXTURE_2D, tname);
1845    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1846    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1847    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1848    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1849    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1850    glVertexPointer(2, GL_FLOAT, 0, vtx);
1851
1852    /*
1853     * Texture coordinate mapping
1854     *
1855     *                 u
1856     *    1 +----------+---+
1857     *      |     |    |   |  image is inverted
1858     *      |     V    |   |  w.r.t. the texture
1859     *  1-v +----------+   |  coordinates
1860     *      |              |
1861     *      |              |
1862     *      |              |
1863     *    0 +--------------+
1864     *      0              1
1865     *
1866     */
1867
1868    class s_curve_interpolator {
1869        const float nbFrames, s, v;
1870    public:
1871        s_curve_interpolator(int nbFrames, float s)
1872        : nbFrames(1.0f / (nbFrames-1)), s(s),
1873          v(1.0f + expf(-s + 0.5f*s)) {
1874        }
1875        float operator()(int f) {
1876            const float x = f * nbFrames;
1877            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1878        }
1879    };
1880
1881    class v_stretch {
1882        const GLfloat hw_w, hw_h;
1883    public:
1884        v_stretch(uint32_t hw_w, uint32_t hw_h)
1885        : hw_w(hw_w), hw_h(hw_h) {
1886        }
1887        void operator()(GLfloat* vtx, float v) {
1888            const GLfloat w = hw_w + (hw_w * v);
1889            const GLfloat h = hw_h - (hw_h * v);
1890            const GLfloat x = (hw_w - w) * 0.5f;
1891            const GLfloat y = (hw_h - h) * 0.5f;
1892            vtx[0] = x;         vtx[1] = y;
1893            vtx[2] = x;         vtx[3] = y + h;
1894            vtx[4] = x + w;     vtx[5] = y + h;
1895            vtx[6] = x + w;     vtx[7] = y;
1896        }
1897    };
1898
1899    class h_stretch {
1900        const GLfloat hw_w, hw_h;
1901    public:
1902        h_stretch(uint32_t hw_w, uint32_t hw_h)
1903        : hw_w(hw_w), hw_h(hw_h) {
1904        }
1905        void operator()(GLfloat* vtx, float v) {
1906            const GLfloat w = hw_w - (hw_w * v);
1907            const GLfloat h = 1.0f;
1908            const GLfloat x = (hw_w - w) * 0.5f;
1909            const GLfloat y = (hw_h - h) * 0.5f;
1910            vtx[0] = x;         vtx[1] = y;
1911            vtx[2] = x;         vtx[3] = y + h;
1912            vtx[4] = x + w;     vtx[5] = y + h;
1913            vtx[6] = x + w;     vtx[7] = y;
1914        }
1915    };
1916
1917    // the full animation is 24 frames
1918    char value[PROPERTY_VALUE_MAX];
1919    property_get("debug.sf.electron_frames", value, "24");
1920    int nbFrames = (atoi(value) + 1) >> 1;
1921    if (nbFrames <= 0) // just in case
1922        nbFrames = 24;
1923
1924    s_curve_interpolator itr(nbFrames, 7.5f);
1925    s_curve_interpolator itg(nbFrames, 8.0f);
1926    s_curve_interpolator itb(nbFrames, 8.5f);
1927
1928    v_stretch vverts(hw_w, hw_h);
1929    glEnable(GL_BLEND);
1930    glBlendFunc(GL_ONE, GL_ONE);
1931    for (int i=0 ; i<nbFrames ; i++) {
1932        float x, y, w, h;
1933        const float vr = itr(i);
1934        const float vg = itg(i);
1935        const float vb = itb(i);
1936
1937        // clear screen
1938        glColorMask(1,1,1,1);
1939        glClear(GL_COLOR_BUFFER_BIT);
1940        glEnable(GL_TEXTURE_2D);
1941
1942        // draw the red plane
1943        vverts(vtx, vr);
1944        glColorMask(1,0,0,1);
1945        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1946
1947        // draw the green plane
1948        vverts(vtx, vg);
1949        glColorMask(0,1,0,1);
1950        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1951
1952        // draw the blue plane
1953        vverts(vtx, vb);
1954        glColorMask(0,0,1,1);
1955        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1956
1957        // draw the white highlight (we use the last vertices)
1958        glDisable(GL_TEXTURE_2D);
1959        glColorMask(1,1,1,1);
1960        glColor4f(vg, vg, vg, 1);
1961        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1962        hw.flip(screenBounds);
1963    }
1964
1965    h_stretch hverts(hw_w, hw_h);
1966    glDisable(GL_BLEND);
1967    glDisable(GL_TEXTURE_2D);
1968    glColorMask(1,1,1,1);
1969    for (int i=0 ; i<nbFrames ; i++) {
1970        const float v = itg(i);
1971        hverts(vtx, v);
1972        glClear(GL_COLOR_BUFFER_BIT);
1973        glColor4f(1-v, 1-v, 1-v, 1);
1974        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1975        hw.flip(screenBounds);
1976    }
1977
1978    glColorMask(1,1,1,1);
1979    glEnable(GL_SCISSOR_TEST);
1980    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1981    glDeleteTextures(1, &tname);
1982    glDisable(GL_TEXTURE_2D);
1983    return NO_ERROR;
1984}
1985
1986status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1987{
1988    status_t result = PERMISSION_DENIED;
1989
1990    if (!GLExtensions::getInstance().haveFramebufferObject())
1991        return INVALID_OPERATION;
1992
1993
1994    // get screen geometry
1995    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1996    const uint32_t hw_w = hw.getWidth();
1997    const uint32_t hw_h = hw.getHeight();
1998    const Region screenBounds(hw.bounds());
1999
2000    GLfloat u, v;
2001    GLuint tname;
2002    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2003    if (result != NO_ERROR) {
2004        return result;
2005    }
2006
2007    // back to main framebuffer
2008    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2009    glDisable(GL_SCISSOR_TEST);
2010
2011    GLfloat vtx[8];
2012    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2013    glBindTexture(GL_TEXTURE_2D, tname);
2014    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2015    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2016    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2017    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2018    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2019    glVertexPointer(2, GL_FLOAT, 0, vtx);
2020
2021    class s_curve_interpolator {
2022        const float nbFrames, s, v;
2023    public:
2024        s_curve_interpolator(int nbFrames, float s)
2025        : nbFrames(1.0f / (nbFrames-1)), s(s),
2026          v(1.0f + expf(-s + 0.5f*s)) {
2027        }
2028        float operator()(int f) {
2029            const float x = f * nbFrames;
2030            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2031        }
2032    };
2033
2034    class v_stretch {
2035        const GLfloat hw_w, hw_h;
2036    public:
2037        v_stretch(uint32_t hw_w, uint32_t hw_h)
2038        : hw_w(hw_w), hw_h(hw_h) {
2039        }
2040        void operator()(GLfloat* vtx, float v) {
2041            const GLfloat w = hw_w + (hw_w * v);
2042            const GLfloat h = hw_h - (hw_h * v);
2043            const GLfloat x = (hw_w - w) * 0.5f;
2044            const GLfloat y = (hw_h - h) * 0.5f;
2045            vtx[0] = x;         vtx[1] = y;
2046            vtx[2] = x;         vtx[3] = y + h;
2047            vtx[4] = x + w;     vtx[5] = y + h;
2048            vtx[6] = x + w;     vtx[7] = y;
2049        }
2050    };
2051
2052    class h_stretch {
2053        const GLfloat hw_w, hw_h;
2054    public:
2055        h_stretch(uint32_t hw_w, uint32_t hw_h)
2056        : hw_w(hw_w), hw_h(hw_h) {
2057        }
2058        void operator()(GLfloat* vtx, float v) {
2059            const GLfloat w = hw_w - (hw_w * v);
2060            const GLfloat h = 1.0f;
2061            const GLfloat x = (hw_w - w) * 0.5f;
2062            const GLfloat y = (hw_h - h) * 0.5f;
2063            vtx[0] = x;         vtx[1] = y;
2064            vtx[2] = x;         vtx[3] = y + h;
2065            vtx[4] = x + w;     vtx[5] = y + h;
2066            vtx[6] = x + w;     vtx[7] = y;
2067        }
2068    };
2069
2070    // the full animation is 12 frames
2071    int nbFrames = 8;
2072    s_curve_interpolator itr(nbFrames, 7.5f);
2073    s_curve_interpolator itg(nbFrames, 8.0f);
2074    s_curve_interpolator itb(nbFrames, 8.5f);
2075
2076    h_stretch hverts(hw_w, hw_h);
2077    glDisable(GL_BLEND);
2078    glDisable(GL_TEXTURE_2D);
2079    glColorMask(1,1,1,1);
2080    for (int i=nbFrames-1 ; i>=0 ; i--) {
2081        const float v = itg(i);
2082        hverts(vtx, v);
2083        glClear(GL_COLOR_BUFFER_BIT);
2084        glColor4f(1-v, 1-v, 1-v, 1);
2085        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2086        hw.flip(screenBounds);
2087    }
2088
2089    nbFrames = 4;
2090    v_stretch vverts(hw_w, hw_h);
2091    glEnable(GL_BLEND);
2092    glBlendFunc(GL_ONE, GL_ONE);
2093    for (int i=nbFrames-1 ; i>=0 ; i--) {
2094        float x, y, w, h;
2095        const float vr = itr(i);
2096        const float vg = itg(i);
2097        const float vb = itb(i);
2098
2099        // clear screen
2100        glColorMask(1,1,1,1);
2101        glClear(GL_COLOR_BUFFER_BIT);
2102        glEnable(GL_TEXTURE_2D);
2103
2104        // draw the red plane
2105        vverts(vtx, vr);
2106        glColorMask(1,0,0,1);
2107        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2108
2109        // draw the green plane
2110        vverts(vtx, vg);
2111        glColorMask(0,1,0,1);
2112        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2113
2114        // draw the blue plane
2115        vverts(vtx, vb);
2116        glColorMask(0,0,1,1);
2117        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2118
2119        hw.flip(screenBounds);
2120    }
2121
2122    glColorMask(1,1,1,1);
2123    glEnable(GL_SCISSOR_TEST);
2124    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2125    glDeleteTextures(1, &tname);
2126    glDisable(GL_TEXTURE_2D);
2127
2128    return NO_ERROR;
2129}
2130
2131// ---------------------------------------------------------------------------
2132
2133status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2134{
2135    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2136    if (!hw.canDraw()) {
2137        // we're already off
2138        return NO_ERROR;
2139    }
2140
2141    // turn off hwc while we're doing the animation
2142    hw.getHwComposer().disable();
2143    // and make sure to turn it back on (if needed) next time we compose
2144    invalidateHwcGeometry();
2145
2146    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2147        electronBeamOffAnimationImplLocked();
2148    }
2149
2150    // always clear the whole screen at the end of the animation
2151    glClearColor(0,0,0,1);
2152    glDisable(GL_SCISSOR_TEST);
2153    glClear(GL_COLOR_BUFFER_BIT);
2154    glEnable(GL_SCISSOR_TEST);
2155    hw.flip( Region(hw.bounds()) );
2156
2157    hw.setCanDraw(false);
2158    return NO_ERROR;
2159}
2160
2161status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2162{
2163    class MessageTurnElectronBeamOff : public MessageBase {
2164        SurfaceFlinger* flinger;
2165        int32_t mode;
2166        status_t result;
2167    public:
2168        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2169            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2170        }
2171        status_t getResult() const {
2172            return result;
2173        }
2174        virtual bool handler() {
2175            Mutex::Autolock _l(flinger->mStateLock);
2176            result = flinger->turnElectronBeamOffImplLocked(mode);
2177            return true;
2178        }
2179    };
2180
2181    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2182    status_t res = postMessageSync(msg);
2183    if (res == NO_ERROR) {
2184        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2185
2186        // work-around: when the power-manager calls us we activate the
2187        // animation. eventually, the "on" animation will be called
2188        // by the power-manager itself
2189        mElectronBeamAnimationMode = mode;
2190    }
2191    return res;
2192}
2193
2194// ---------------------------------------------------------------------------
2195
2196status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2197{
2198    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2199    if (hw.canDraw()) {
2200        // we're already on
2201        return NO_ERROR;
2202    }
2203    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2204        electronBeamOnAnimationImplLocked();
2205    }
2206    hw.setCanDraw(true);
2207
2208    // make sure to redraw the whole screen when the animation is done
2209    mDirtyRegion.set(hw.bounds());
2210    signalEvent();
2211
2212    return NO_ERROR;
2213}
2214
2215status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2216{
2217    class MessageTurnElectronBeamOn : public MessageBase {
2218        SurfaceFlinger* flinger;
2219        int32_t mode;
2220        status_t result;
2221    public:
2222        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2223            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2224        }
2225        status_t getResult() const {
2226            return result;
2227        }
2228        virtual bool handler() {
2229            Mutex::Autolock _l(flinger->mStateLock);
2230            result = flinger->turnElectronBeamOnImplLocked(mode);
2231            return true;
2232        }
2233    };
2234
2235    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2236    return NO_ERROR;
2237}
2238
2239// ---------------------------------------------------------------------------
2240
2241status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2242        sp<IMemoryHeap>* heap,
2243        uint32_t* w, uint32_t* h, PixelFormat* f,
2244        uint32_t sw, uint32_t sh,
2245        uint32_t minLayerZ, uint32_t maxLayerZ)
2246{
2247    status_t result = PERMISSION_DENIED;
2248
2249    // only one display supported for now
2250    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2251        return BAD_VALUE;
2252
2253    // make sure none of the layers are protected
2254    const LayerVector& layers(mDrawingState.layersSortedByZ);
2255    const size_t count = layers.size();
2256    for (size_t i=0 ; i<count ; ++i) {
2257        const sp<LayerBase>& layer(layers[i]);
2258        const uint32_t flags = layer->drawingState().flags;
2259        if (!(flags & ISurfaceComposer::eLayerHidden)) {
2260            const uint32_t z = layer->drawingState().z;
2261            if (z >= minLayerZ && z <= maxLayerZ) {
2262                if (layer->isProtected()) {
2263                    return INVALID_OPERATION;
2264                }
2265            }
2266        }
2267    }
2268
2269    if (!GLExtensions::getInstance().haveFramebufferObject())
2270        return INVALID_OPERATION;
2271
2272    // get screen geometry
2273    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2274    const uint32_t hw_w = hw.getWidth();
2275    const uint32_t hw_h = hw.getHeight();
2276
2277    if ((sw > hw_w) || (sh > hw_h))
2278        return BAD_VALUE;
2279
2280    sw = (!sw) ? hw_w : sw;
2281    sh = (!sh) ? hw_h : sh;
2282    const size_t size = sw * sh * 4;
2283
2284    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2285    //        sw, sh, minLayerZ, maxLayerZ);
2286
2287    // make sure to clear all GL error flags
2288    while ( glGetError() != GL_NO_ERROR ) ;
2289
2290    // create a FBO
2291    GLuint name, tname;
2292    glGenRenderbuffersOES(1, &tname);
2293    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2294    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2295    glGenFramebuffersOES(1, &name);
2296    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2297    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2298            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2299
2300    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2301
2302    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2303
2304        // invert everything, b/c glReadPixel() below will invert the FB
2305        glViewport(0, 0, sw, sh);
2306        glScissor(0, 0, sw, sh);
2307        glEnable(GL_SCISSOR_TEST);
2308        glMatrixMode(GL_PROJECTION);
2309        glPushMatrix();
2310        glLoadIdentity();
2311        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2312        glMatrixMode(GL_MODELVIEW);
2313
2314        // redraw the screen entirely...
2315        glClearColor(0,0,0,1);
2316        glClear(GL_COLOR_BUFFER_BIT);
2317
2318        for (size_t i=0 ; i<count ; ++i) {
2319            const sp<LayerBase>& layer(layers[i]);
2320            const uint32_t flags = layer->drawingState().flags;
2321            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2322                const uint32_t z = layer->drawingState().z;
2323                if (z >= minLayerZ && z <= maxLayerZ) {
2324                    layer->drawForSreenShot();
2325                }
2326            }
2327        }
2328
2329        // XXX: this is needed on tegra
2330        glEnable(GL_SCISSOR_TEST);
2331        glScissor(0, 0, sw, sh);
2332
2333        // check for errors and return screen capture
2334        if (glGetError() != GL_NO_ERROR) {
2335            // error while rendering
2336            result = INVALID_OPERATION;
2337        } else {
2338            // allocate shared memory large enough to hold the
2339            // screen capture
2340            sp<MemoryHeapBase> base(
2341                    new MemoryHeapBase(size, 0, "screen-capture") );
2342            void* const ptr = base->getBase();
2343            if (ptr) {
2344                // capture the screen with glReadPixels()
2345                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2346                if (glGetError() == GL_NO_ERROR) {
2347                    *heap = base;
2348                    *w = sw;
2349                    *h = sh;
2350                    *f = PIXEL_FORMAT_RGBA_8888;
2351                    result = NO_ERROR;
2352                }
2353            } else {
2354                result = NO_MEMORY;
2355            }
2356        }
2357        glEnable(GL_SCISSOR_TEST);
2358        glViewport(0, 0, hw_w, hw_h);
2359        glMatrixMode(GL_PROJECTION);
2360        glPopMatrix();
2361        glMatrixMode(GL_MODELVIEW);
2362    } else {
2363        result = BAD_VALUE;
2364    }
2365
2366    // release FBO resources
2367    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2368    glDeleteRenderbuffersOES(1, &tname);
2369    glDeleteFramebuffersOES(1, &name);
2370
2371    hw.compositionComplete();
2372
2373    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2374
2375    return result;
2376}
2377
2378
2379status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2380        sp<IMemoryHeap>* heap,
2381        uint32_t* width, uint32_t* height, PixelFormat* format,
2382        uint32_t sw, uint32_t sh,
2383        uint32_t minLayerZ, uint32_t maxLayerZ)
2384{
2385    // only one display supported for now
2386    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2387        return BAD_VALUE;
2388
2389    if (!GLExtensions::getInstance().haveFramebufferObject())
2390        return INVALID_OPERATION;
2391
2392    class MessageCaptureScreen : public MessageBase {
2393        SurfaceFlinger* flinger;
2394        DisplayID dpy;
2395        sp<IMemoryHeap>* heap;
2396        uint32_t* w;
2397        uint32_t* h;
2398        PixelFormat* f;
2399        uint32_t sw;
2400        uint32_t sh;
2401        uint32_t minLayerZ;
2402        uint32_t maxLayerZ;
2403        status_t result;
2404    public:
2405        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2406                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2407                uint32_t sw, uint32_t sh,
2408                uint32_t minLayerZ, uint32_t maxLayerZ)
2409            : flinger(flinger), dpy(dpy),
2410              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2411              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2412              result(PERMISSION_DENIED)
2413        {
2414        }
2415        status_t getResult() const {
2416            return result;
2417        }
2418        virtual bool handler() {
2419            Mutex::Autolock _l(flinger->mStateLock);
2420
2421            // if we have secure windows, never allow the screen capture
2422            if (flinger->mSecureFrameBuffer)
2423                return true;
2424
2425            result = flinger->captureScreenImplLocked(dpy,
2426                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2427
2428            return true;
2429        }
2430    };
2431
2432    sp<MessageBase> msg = new MessageCaptureScreen(this,
2433            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2434    status_t res = postMessageSync(msg);
2435    if (res == NO_ERROR) {
2436        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2437    }
2438    return res;
2439}
2440
2441// ---------------------------------------------------------------------------
2442
2443sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2444{
2445    sp<Layer> result;
2446    Mutex::Autolock _l(mStateLock);
2447    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2448    return result;
2449}
2450
2451// ---------------------------------------------------------------------------
2452
2453Client::Client(const sp<SurfaceFlinger>& flinger)
2454    : mFlinger(flinger), mNameGenerator(1)
2455{
2456}
2457
2458Client::~Client()
2459{
2460    const size_t count = mLayers.size();
2461    for (size_t i=0 ; i<count ; i++) {
2462        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2463        if (layer != 0) {
2464            mFlinger->removeLayer(layer);
2465        }
2466    }
2467}
2468
2469status_t Client::initCheck() const {
2470    return NO_ERROR;
2471}
2472
2473size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2474{
2475    Mutex::Autolock _l(mLock);
2476    size_t name = mNameGenerator++;
2477    mLayers.add(name, layer);
2478    return name;
2479}
2480
2481void Client::detachLayer(const LayerBaseClient* layer)
2482{
2483    Mutex::Autolock _l(mLock);
2484    // we do a linear search here, because this doesn't happen often
2485    const size_t count = mLayers.size();
2486    for (size_t i=0 ; i<count ; i++) {
2487        if (mLayers.valueAt(i) == layer) {
2488            mLayers.removeItemsAt(i, 1);
2489            break;
2490        }
2491    }
2492}
2493sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2494{
2495    Mutex::Autolock _l(mLock);
2496    sp<LayerBaseClient> lbc;
2497    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2498    if (layer != 0) {
2499        lbc = layer.promote();
2500        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2501    }
2502    return lbc;
2503}
2504
2505
2506status_t Client::onTransact(
2507    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2508{
2509    // these must be checked
2510     IPCThreadState* ipc = IPCThreadState::self();
2511     const int pid = ipc->getCallingPid();
2512     const int uid = ipc->getCallingUid();
2513     const int self_pid = getpid();
2514     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2515         // we're called from a different process, do the real check
2516         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2517         {
2518             LOGE("Permission Denial: "
2519                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2520             return PERMISSION_DENIED;
2521         }
2522     }
2523     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2524}
2525
2526
2527sp<ISurface> Client::createSurface(
2528        ISurfaceComposerClient::surface_data_t* params,
2529        const String8& name,
2530        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2531        uint32_t flags)
2532{
2533    /*
2534     * createSurface must be called from the GL thread so that it can
2535     * have access to the GL context.
2536     */
2537
2538    class MessageCreateSurface : public MessageBase {
2539        sp<ISurface> result;
2540        SurfaceFlinger* flinger;
2541        ISurfaceComposerClient::surface_data_t* params;
2542        Client* client;
2543        const String8& name;
2544        DisplayID display;
2545        uint32_t w, h;
2546        PixelFormat format;
2547        uint32_t flags;
2548    public:
2549        MessageCreateSurface(SurfaceFlinger* flinger,
2550                ISurfaceComposerClient::surface_data_t* params,
2551                const String8& name, Client* client,
2552                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2553                uint32_t flags)
2554            : flinger(flinger), params(params), client(client), name(name),
2555              display(display), w(w), h(h), format(format), flags(flags)
2556        {
2557        }
2558        sp<ISurface> getResult() const { return result; }
2559        virtual bool handler() {
2560            result = flinger->createSurface(params, name, client,
2561                    display, w, h, format, flags);
2562            return true;
2563        }
2564    };
2565
2566    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2567            params, name, this, display, w, h, format, flags);
2568    mFlinger->postMessageSync(msg);
2569    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2570}
2571status_t Client::destroySurface(SurfaceID sid) {
2572    return mFlinger->removeSurface(this, sid);
2573}
2574
2575// ---------------------------------------------------------------------------
2576
2577GraphicBufferAlloc::GraphicBufferAlloc() {}
2578
2579GraphicBufferAlloc::~GraphicBufferAlloc() {}
2580
2581sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2582        PixelFormat format, uint32_t usage, status_t* error) {
2583    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2584    status_t err = graphicBuffer->initCheck();
2585    *error = err;
2586    if (err != 0 || graphicBuffer->handle == 0) {
2587        if (err == NO_MEMORY) {
2588            GraphicBuffer::dumpAllocationsToSystemLog();
2589        }
2590        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2591             "failed (%s), handle=%p",
2592                w, h, strerror(-err), graphicBuffer->handle);
2593        return 0;
2594    }
2595    return graphicBuffer;
2596}
2597
2598// ---------------------------------------------------------------------------
2599
2600GraphicPlane::GraphicPlane()
2601    : mHw(0)
2602{
2603}
2604
2605GraphicPlane::~GraphicPlane() {
2606    delete mHw;
2607}
2608
2609bool GraphicPlane::initialized() const {
2610    return mHw ? true : false;
2611}
2612
2613int GraphicPlane::getWidth() const {
2614    return mWidth;
2615}
2616
2617int GraphicPlane::getHeight() const {
2618    return mHeight;
2619}
2620
2621void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2622{
2623    mHw = hw;
2624
2625    // initialize the display orientation transform.
2626    // it's a constant that should come from the display driver.
2627    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2628    char property[PROPERTY_VALUE_MAX];
2629    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2630        //displayOrientation
2631        switch (atoi(property)) {
2632        case 90:
2633            displayOrientation = ISurfaceComposer::eOrientation90;
2634            break;
2635        case 270:
2636            displayOrientation = ISurfaceComposer::eOrientation270;
2637            break;
2638        }
2639    }
2640
2641    const float w = hw->getWidth();
2642    const float h = hw->getHeight();
2643    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2644            &mDisplayTransform);
2645    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2646        mDisplayWidth = h;
2647        mDisplayHeight = w;
2648    } else {
2649        mDisplayWidth = w;
2650        mDisplayHeight = h;
2651    }
2652
2653    setOrientation(ISurfaceComposer::eOrientationDefault);
2654}
2655
2656status_t GraphicPlane::orientationToTransfrom(
2657        int orientation, int w, int h, Transform* tr)
2658{
2659    uint32_t flags = 0;
2660    switch (orientation) {
2661    case ISurfaceComposer::eOrientationDefault:
2662        flags = Transform::ROT_0;
2663        break;
2664    case ISurfaceComposer::eOrientation90:
2665        flags = Transform::ROT_90;
2666        break;
2667    case ISurfaceComposer::eOrientation180:
2668        flags = Transform::ROT_180;
2669        break;
2670    case ISurfaceComposer::eOrientation270:
2671        flags = Transform::ROT_270;
2672        break;
2673    default:
2674        return BAD_VALUE;
2675    }
2676    tr->set(flags, w, h);
2677    return NO_ERROR;
2678}
2679
2680status_t GraphicPlane::setOrientation(int orientation)
2681{
2682    // If the rotation can be handled in hardware, this is where
2683    // the magic should happen.
2684
2685    const DisplayHardware& hw(displayHardware());
2686    const float w = mDisplayWidth;
2687    const float h = mDisplayHeight;
2688    mWidth = int(w);
2689    mHeight = int(h);
2690
2691    Transform orientationTransform;
2692    GraphicPlane::orientationToTransfrom(orientation, w, h,
2693            &orientationTransform);
2694    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2695        mWidth = int(h);
2696        mHeight = int(w);
2697    }
2698
2699    mOrientation = orientation;
2700    mGlobalTransform = mDisplayTransform * orientationTransform;
2701    return NO_ERROR;
2702}
2703
2704const DisplayHardware& GraphicPlane::displayHardware() const {
2705    return *mHw;
2706}
2707
2708DisplayHardware& GraphicPlane::editDisplayHardware() {
2709    return *mHw;
2710}
2711
2712const Transform& GraphicPlane::transform() const {
2713    return mGlobalTransform;
2714}
2715
2716EGLDisplay GraphicPlane::getEGLDisplay() const {
2717    return mHw->getEGLDisplay();
2718}
2719
2720// ---------------------------------------------------------------------------
2721
2722}; // namespace android
2723