SurfaceFlinger.cpp revision 4d143eed994778d37eb09bb5d452c26f12bca6e1 
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 <gui/IDisplayEventConnection.h>
38
39#include <utils/String8.h>
40#include <utils/String16.h>
41#include <utils/StopWatch.h>
42
43#include <ui/GraphicBufferAllocator.h>
44#include <ui/PixelFormat.h>
45
46#include <pixelflinger/pixelflinger.h>
47#include <GLES/gl.h>
48
49#include "clz.h"
50#include "DisplayEventConnection.h"
51#include "EventThread.h"
52#include "GLExtensions.h"
53#include "DdmConnection.h"
54#include "Layer.h"
55#include "LayerDim.h"
56#include "LayerScreenshot.h"
57#include "SurfaceFlinger.h"
58
59#include "DisplayHardware/DisplayHardware.h"
60#include "DisplayHardware/HWComposer.h"
61
62#include <private/android_filesystem_config.h>
63#include <private/surfaceflinger/SharedBufferStack.h>
64
65#define EGL_VERSION_HW_ANDROID  0x3143
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        mTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mElectronBeamAnimationMode(0),
88        mDebugRegion(0),
89        mDebugBackground(0),
90        mDebugDDMS(0),
91        mDebugDisableHWC(0),
92        mDebugDisableTransformHint(0),
93        mDebugInSwapBuffers(0),
94        mLastSwapBufferTime(0),
95        mDebugInTransaction(0),
96        mLastTransactionTime(0),
97        mBootFinished(false),
98        mConsoleSignals(0),
99        mSecureFrameBuffer(0)
100{
101    init();
102}
103
104void SurfaceFlinger::init()
105{
106    ALOGI("SurfaceFlinger is starting");
107
108    // debugging stuff...
109    char value[PROPERTY_VALUE_MAX];
110
111    property_get("debug.sf.showupdates", value, "0");
112    mDebugRegion = atoi(value);
113
114    property_get("debug.sf.showbackground", value, "0");
115    mDebugBackground = atoi(value);
116
117    property_get("debug.sf.ddms", value, "0");
118    mDebugDDMS = atoi(value);
119    if (mDebugDDMS) {
120        DdmConnection::start(getServiceName());
121    }
122
123    ALOGI_IF(mDebugRegion,       "showupdates enabled");
124    ALOGI_IF(mDebugBackground,   "showbackground enabled");
125    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
126}
127
128void SurfaceFlinger::onFirstRef()
129{
130    mEventQueue.init(this);
131
132    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
133
134    // Wait for the main thread to be done with its initialization
135    mReadyToRunBarrier.wait();
136}
137
138
139SurfaceFlinger::~SurfaceFlinger()
140{
141    glDeleteTextures(1, &mWormholeTexName);
142}
143
144void SurfaceFlinger::binderDied(const wp<IBinder>& who)
145{
146    // the window manager died on us. prepare its eulogy.
147
148    // reset screen orientation
149    Vector<ComposerState> state;
150    setTransactionState(state, eOrientationDefault, 0);
151
152    // restart the boot-animation
153    property_set("ctl.start", "bootanim");
154}
155
156sp<IMemoryHeap> SurfaceFlinger::getCblk() const
157{
158    return mServerHeap;
159}
160
161sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
162{
163    sp<ISurfaceComposerClient> bclient;
164    sp<Client> client(new Client(this));
165    status_t err = client->initCheck();
166    if (err == NO_ERROR) {
167        bclient = client;
168    }
169    return bclient;
170}
171
172sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
173{
174    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
175    return gba;
176}
177
178const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
179{
180    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
181    const GraphicPlane& plane(mGraphicPlanes[dpy]);
182    return plane;
183}
184
185GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
186{
187    return const_cast<GraphicPlane&>(
188        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
189}
190
191void SurfaceFlinger::bootFinished()
192{
193    const nsecs_t now = systemTime();
194    const nsecs_t duration = now - mBootTime;
195    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
196    mBootFinished = true;
197
198    // wait patiently for the window manager death
199    const String16 name("window");
200    sp<IBinder> window(defaultServiceManager()->getService(name));
201    if (window != 0) {
202        window->linkToDeath(this);
203    }
204
205    // stop boot animation
206    property_set("ctl.stop", "bootanim");
207}
208
209static inline uint16_t pack565(int r, int g, int b) {
210    return (r<<11)|(g<<5)|b;
211}
212
213status_t SurfaceFlinger::readyToRun()
214{
215    ALOGI(   "SurfaceFlinger's main thread ready to run. "
216            "Initializing graphics H/W...");
217
218    // we only support one display currently
219    int dpy = 0;
220
221    {
222        // initialize the main display
223        GraphicPlane& plane(graphicPlane(dpy));
224        DisplayHardware* const hw = new DisplayHardware(this, dpy);
225        plane.setDisplayHardware(hw);
226    }
227
228    // create the shared control-block
229    mServerHeap = new MemoryHeapBase(4096,
230            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
231    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
232
233    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
234    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
235
236    new(mServerCblk) surface_flinger_cblk_t;
237
238    // initialize primary screen
239    // (other display should be initialized in the same manner, but
240    // asynchronously, as they could come and go. None of this is supported
241    // yet).
242    const GraphicPlane& plane(graphicPlane(dpy));
243    const DisplayHardware& hw = plane.displayHardware();
244    const uint32_t w = hw.getWidth();
245    const uint32_t h = hw.getHeight();
246    const uint32_t f = hw.getFormat();
247    hw.makeCurrent();
248
249    // initialize the shared control block
250    mServerCblk->connected |= 1<<dpy;
251    display_cblk_t* dcblk = mServerCblk->displays + dpy;
252    memset(dcblk, 0, sizeof(display_cblk_t));
253    dcblk->w            = plane.getWidth();
254    dcblk->h            = plane.getHeight();
255    dcblk->format       = f;
256    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
257    dcblk->xdpi         = hw.getDpiX();
258    dcblk->ydpi         = hw.getDpiY();
259    dcblk->fps          = hw.getRefreshRate();
260    dcblk->density      = hw.getDensity();
261
262    // Initialize OpenGL|ES
263    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
264    glPixelStorei(GL_PACK_ALIGNMENT, 4);
265    glEnableClientState(GL_VERTEX_ARRAY);
266    glEnable(GL_SCISSOR_TEST);
267    glShadeModel(GL_FLAT);
268    glDisable(GL_DITHER);
269    glDisable(GL_CULL_FACE);
270
271    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
272    const uint16_t g1 = pack565(0x17,0x2f,0x17);
273    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
274    glGenTextures(1, &mWormholeTexName);
275    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
276    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
277    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
278    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
280    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
281            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
282
283    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
284    glGenTextures(1, &mProtectedTexName);
285    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
286    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
287    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
288    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
290    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
291            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
292
293    glViewport(0, 0, w, h);
294    glMatrixMode(GL_PROJECTION);
295    glLoadIdentity();
296    // put the origin in the left-bottom corner
297    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
298
299
300    // start the EventThread
301    mEventThread = new EventThread(this);
302    mEventQueue.setEventThread(mEventThread);
303    hw.startSleepManagement();
304
305    /*
306     *  We're now ready to accept clients...
307     */
308
309    mReadyToRunBarrier.open();
310
311    // start boot animation
312    property_set("ctl.start", "bootanim");
313
314    return NO_ERROR;
315}
316
317// ----------------------------------------------------------------------------
318
319bool SurfaceFlinger::authenticateSurfaceTexture(
320        const sp<ISurfaceTexture>& surfaceTexture) const {
321    Mutex::Autolock _l(mStateLock);
322    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
323
324    // Check the visible layer list for the ISurface
325    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
326    size_t count = currentLayers.size();
327    for (size_t i=0 ; i<count ; i++) {
328        const sp<LayerBase>& layer(currentLayers[i]);
329        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
330        if (lbc != NULL) {
331            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
332            if (lbcBinder == surfaceTextureBinder) {
333                return true;
334            }
335        }
336    }
337
338    // Check the layers in the purgatory.  This check is here so that if a
339    // SurfaceTexture gets destroyed before all the clients are done using it,
340    // the error will not be reported as "surface XYZ is not authenticated", but
341    // will instead fail later on when the client tries to use the surface,
342    // which should be reported as "surface XYZ returned an -ENODEV".  The
343    // purgatorized layers are no less authentic than the visible ones, so this
344    // should not cause any harm.
345    size_t purgatorySize =  mLayerPurgatory.size();
346    for (size_t i=0 ; i<purgatorySize ; i++) {
347        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
348        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
349        if (lbc != NULL) {
350            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
351            if (lbcBinder == surfaceTextureBinder) {
352                return true;
353            }
354        }
355    }
356
357    return false;
358}
359
360// ----------------------------------------------------------------------------
361
362sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
363    return mEventThread->createEventConnection();
364}
365
366// ----------------------------------------------------------------------------
367
368void SurfaceFlinger::waitForEvent() {
369    mEventQueue.waitMessage();
370}
371
372void SurfaceFlinger::signalTransaction() {
373    mEventQueue.invalidate();
374}
375
376void SurfaceFlinger::signalLayerUpdate() {
377    mEventQueue.invalidate();
378}
379
380void SurfaceFlinger::signalRefresh() {
381    mEventQueue.refresh();
382}
383
384status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
385        nsecs_t reltime, uint32_t flags) {
386    return mEventQueue.postMessage(msg, reltime);
387}
388
389status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
390        nsecs_t reltime, uint32_t flags) {
391    status_t res = mEventQueue.postMessage(msg, reltime);
392    if (res == NO_ERROR) {
393        msg->wait();
394    }
395    return res;
396}
397
398bool SurfaceFlinger::threadLoop()
399{
400    waitForEvent();
401    return true;
402}
403
404void SurfaceFlinger::onMessageReceived(int32_t what)
405{
406    switch (what) {
407        case MessageQueue::REFRESH: {
408//        case MessageQueue::INVALIDATE: {
409            // check for transactions
410            if (CC_UNLIKELY(mConsoleSignals)) {
411                handleConsoleEvents();
412            }
413
414            // if we're in a global transaction, don't do anything.
415            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
416            uint32_t transactionFlags = peekTransactionFlags(mask);
417            if (CC_UNLIKELY(transactionFlags)) {
418                handleTransaction(transactionFlags);
419            }
420
421            // post surfaces (if needed)
422            handlePageFlip();
423
424//            signalRefresh();
425//
426//        } break;
427//
428//        case MessageQueue::REFRESH: {
429
430            handleRefresh();
431
432            const DisplayHardware& hw(graphicPlane(0).displayHardware());
433
434//            if (mDirtyRegion.isEmpty()) {
435//                return;
436//            }
437
438            if (CC_UNLIKELY(mHwWorkListDirty)) {
439                // build the h/w work list
440                handleWorkList();
441            }
442
443            if (CC_LIKELY(hw.canDraw())) {
444                // repaint the framebuffer (if needed)
445                handleRepaint();
446                // inform the h/w that we're done compositing
447                hw.compositionComplete();
448                postFramebuffer();
449            } else {
450                // pretend we did the post
451                hw.compositionComplete();
452            }
453
454        } break;
455    }
456}
457
458void SurfaceFlinger::postFramebuffer()
459{
460    // mSwapRegion can be empty here is some cases, for instance if a hidden
461    // or fully transparent window is updating.
462    // in that case, we need to flip anyways to not risk a deadlock with
463    // h/w composer.
464
465    const DisplayHardware& hw(graphicPlane(0).displayHardware());
466    const nsecs_t now = systemTime();
467    mDebugInSwapBuffers = now;
468    hw.flip(mSwapRegion);
469
470    size_t numLayers = mVisibleLayersSortedByZ.size();
471    for (size_t i = 0; i < numLayers; i++) {
472        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
473    }
474
475    mLastSwapBufferTime = systemTime() - now;
476    mDebugInSwapBuffers = 0;
477    mSwapRegion.clear();
478}
479
480void SurfaceFlinger::handleConsoleEvents()
481{
482    // something to do with the console
483    const DisplayHardware& hw = graphicPlane(0).displayHardware();
484
485    int what = android_atomic_and(0, &mConsoleSignals);
486    if (what & eConsoleAcquired) {
487        hw.acquireScreen();
488        // this is a temporary work-around, eventually this should be called
489        // by the power-manager
490        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
491    }
492
493    if (what & eConsoleReleased) {
494        if (hw.isScreenAcquired()) {
495            hw.releaseScreen();
496        }
497    }
498
499    mDirtyRegion.set(hw.bounds());
500}
501
502void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
503{
504    Mutex::Autolock _l(mStateLock);
505    const nsecs_t now = systemTime();
506    mDebugInTransaction = now;
507
508    // Here we're guaranteed that some transaction flags are set
509    // so we can call handleTransactionLocked() unconditionally.
510    // We call getTransactionFlags(), which will also clear the flags,
511    // with mStateLock held to guarantee that mCurrentState won't change
512    // until the transaction is committed.
513
514    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
515    transactionFlags = getTransactionFlags(mask);
516    handleTransactionLocked(transactionFlags);
517
518    mLastTransactionTime = systemTime() - now;
519    mDebugInTransaction = 0;
520    invalidateHwcGeometry();
521    // here the transaction has been committed
522}
523
524void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
525{
526    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
527    const size_t count = currentLayers.size();
528
529    /*
530     * Traversal of the children
531     * (perform the transaction for each of them if needed)
532     */
533
534    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
535    if (layersNeedTransaction) {
536        for (size_t i=0 ; i<count ; i++) {
537            const sp<LayerBase>& layer = currentLayers[i];
538            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
539            if (!trFlags) continue;
540
541            const uint32_t flags = layer->doTransaction(0);
542            if (flags & Layer::eVisibleRegion)
543                mVisibleRegionsDirty = true;
544        }
545    }
546
547    /*
548     * Perform our own transaction if needed
549     */
550
551    if (transactionFlags & eTransactionNeeded) {
552        if (mCurrentState.orientation != mDrawingState.orientation) {
553            // the orientation has changed, recompute all visible regions
554            // and invalidate everything.
555
556            const int dpy = 0;
557            const int orientation = mCurrentState.orientation;
558            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
559            GraphicPlane& plane(graphicPlane(dpy));
560            plane.setOrientation(orientation);
561
562            // update the shared control block
563            const DisplayHardware& hw(plane.displayHardware());
564            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
565            dcblk->orientation = orientation;
566            dcblk->w = plane.getWidth();
567            dcblk->h = plane.getHeight();
568
569            mVisibleRegionsDirty = true;
570            mDirtyRegion.set(hw.bounds());
571        }
572
573        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
574            // layers have been added
575            mVisibleRegionsDirty = true;
576        }
577
578        // some layers might have been removed, so
579        // we need to update the regions they're exposing.
580        if (mLayersRemoved) {
581            mLayersRemoved = false;
582            mVisibleRegionsDirty = true;
583            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
584            const size_t count = previousLayers.size();
585            for (size_t i=0 ; i<count ; i++) {
586                const sp<LayerBase>& layer(previousLayers[i]);
587                if (currentLayers.indexOf( layer ) < 0) {
588                    // this layer is not visible anymore
589                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
590                }
591            }
592        }
593    }
594
595    commitTransaction();
596}
597
598void SurfaceFlinger::computeVisibleRegions(
599    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
600{
601    const GraphicPlane& plane(graphicPlane(0));
602    const Transform& planeTransform(plane.transform());
603    const DisplayHardware& hw(plane.displayHardware());
604    const Region screenRegion(hw.bounds());
605
606    Region aboveOpaqueLayers;
607    Region aboveCoveredLayers;
608    Region dirty;
609
610    bool secureFrameBuffer = false;
611
612    size_t i = currentLayers.size();
613    while (i--) {
614        const sp<LayerBase>& layer = currentLayers[i];
615        layer->validateVisibility(planeTransform);
616
617        // start with the whole surface at its current location
618        const Layer::State& s(layer->drawingState());
619
620        /*
621         * opaqueRegion: area of a surface that is fully opaque.
622         */
623        Region opaqueRegion;
624
625        /*
626         * visibleRegion: area of a surface that is visible on screen
627         * and not fully transparent. This is essentially the layer's
628         * footprint minus the opaque regions above it.
629         * Areas covered by a translucent surface are considered visible.
630         */
631        Region visibleRegion;
632
633        /*
634         * coveredRegion: area of a surface that is covered by all
635         * visible regions above it (which includes the translucent areas).
636         */
637        Region coveredRegion;
638
639
640        // handle hidden surfaces by setting the visible region to empty
641        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
642            const bool translucent = !layer->isOpaque();
643            const Rect bounds(layer->visibleBounds());
644            visibleRegion.set(bounds);
645            visibleRegion.andSelf(screenRegion);
646            if (!visibleRegion.isEmpty()) {
647                // Remove the transparent area from the visible region
648                if (translucent) {
649                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
650                }
651
652                // compute the opaque region
653                const int32_t layerOrientation = layer->getOrientation();
654                if (s.alpha==255 && !translucent &&
655                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
656                    // the opaque region is the layer's footprint
657                    opaqueRegion = visibleRegion;
658                }
659            }
660        }
661
662        // Clip the covered region to the visible region
663        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
664
665        // Update aboveCoveredLayers for next (lower) layer
666        aboveCoveredLayers.orSelf(visibleRegion);
667
668        // subtract the opaque region covered by the layers above us
669        visibleRegion.subtractSelf(aboveOpaqueLayers);
670
671        // compute this layer's dirty region
672        if (layer->contentDirty) {
673            // we need to invalidate the whole region
674            dirty = visibleRegion;
675            // as well, as the old visible region
676            dirty.orSelf(layer->visibleRegionScreen);
677            layer->contentDirty = false;
678        } else {
679            /* compute the exposed region:
680             *   the exposed region consists of two components:
681             *   1) what's VISIBLE now and was COVERED before
682             *   2) what's EXPOSED now less what was EXPOSED before
683             *
684             * note that (1) is conservative, we start with the whole
685             * visible region but only keep what used to be covered by
686             * something -- which mean it may have been exposed.
687             *
688             * (2) handles areas that were not covered by anything but got
689             * exposed because of a resize.
690             */
691            const Region newExposed = visibleRegion - coveredRegion;
692            const Region oldVisibleRegion = layer->visibleRegionScreen;
693            const Region oldCoveredRegion = layer->coveredRegionScreen;
694            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
695            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
696        }
697        dirty.subtractSelf(aboveOpaqueLayers);
698
699        // accumulate to the screen dirty region
700        dirtyRegion.orSelf(dirty);
701
702        // Update aboveOpaqueLayers for next (lower) layer
703        aboveOpaqueLayers.orSelf(opaqueRegion);
704
705        // Store the visible region is screen space
706        layer->setVisibleRegion(visibleRegion);
707        layer->setCoveredRegion(coveredRegion);
708
709        // If a secure layer is partially visible, lock-down the screen!
710        if (layer->isSecure() && !visibleRegion.isEmpty()) {
711            secureFrameBuffer = true;
712        }
713    }
714
715    // invalidate the areas where a layer was removed
716    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
717    mDirtyRegionRemovedLayer.clear();
718
719    mSecureFrameBuffer = secureFrameBuffer;
720    opaqueRegion = aboveOpaqueLayers;
721}
722
723
724void SurfaceFlinger::commitTransaction()
725{
726    if (!mLayersPendingRemoval.isEmpty()) {
727        // Notify removed layers now that they can't be drawn from
728        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
729            mLayersPendingRemoval[i]->onRemoved();
730        }
731        mLayersPendingRemoval.clear();
732    }
733
734    mDrawingState = mCurrentState;
735    mTransationPending = false;
736    mTransactionCV.broadcast();
737}
738
739void SurfaceFlinger::handlePageFlip()
740{
741    const DisplayHardware& hw = graphicPlane(0).displayHardware();
742    const Region screenRegion(hw.bounds());
743
744    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
745    const bool visibleRegions = lockPageFlip(currentLayers);
746
747        if (visibleRegions || mVisibleRegionsDirty) {
748            Region opaqueRegion;
749            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
750
751            /*
752             *  rebuild the visible layer list
753             */
754            const size_t count = currentLayers.size();
755            mVisibleLayersSortedByZ.clear();
756            mVisibleLayersSortedByZ.setCapacity(count);
757            for (size_t i=0 ; i<count ; i++) {
758                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
759                    mVisibleLayersSortedByZ.add(currentLayers[i]);
760            }
761
762            mWormholeRegion = screenRegion.subtract(opaqueRegion);
763            mVisibleRegionsDirty = false;
764            invalidateHwcGeometry();
765        }
766
767    unlockPageFlip(currentLayers);
768
769    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
770    mDirtyRegion.andSelf(screenRegion);
771}
772
773void SurfaceFlinger::invalidateHwcGeometry()
774{
775    mHwWorkListDirty = true;
776}
777
778bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
779{
780    bool recomputeVisibleRegions = false;
781    size_t count = currentLayers.size();
782    sp<LayerBase> const* layers = currentLayers.array();
783    for (size_t i=0 ; i<count ; i++) {
784        const sp<LayerBase>& layer(layers[i]);
785        layer->lockPageFlip(recomputeVisibleRegions);
786    }
787    return recomputeVisibleRegions;
788}
789
790void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
791{
792    const GraphicPlane& plane(graphicPlane(0));
793    const Transform& planeTransform(plane.transform());
794    const 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->unlockPageFlip(planeTransform, mDirtyRegion);
799    }
800}
801
802void SurfaceFlinger::handleRefresh()
803{
804    bool needInvalidate = false;
805    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
806    const size_t count = currentLayers.size();
807    for (size_t i=0 ; i<count ; i++) {
808        const sp<LayerBase>& layer(currentLayers[i]);
809        if (layer->onPreComposition()) {
810            needInvalidate = true;
811        }
812    }
813    if (needInvalidate) {
814        signalLayerUpdate();
815    }
816}
817
818
819void SurfaceFlinger::handleWorkList()
820{
821    mHwWorkListDirty = false;
822    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
823    if (hwc.initCheck() == NO_ERROR) {
824        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
825        const size_t count = currentLayers.size();
826        hwc.createWorkList(count);
827        hwc_layer_t* const cur(hwc.getLayers());
828        for (size_t i=0 ; cur && i<count ; i++) {
829            currentLayers[i]->setGeometry(&cur[i]);
830            if (mDebugDisableHWC || mDebugRegion) {
831                cur[i].compositionType = HWC_FRAMEBUFFER;
832                cur[i].flags |= HWC_SKIP_LAYER;
833            }
834        }
835    }
836}
837
838void SurfaceFlinger::handleRepaint()
839{
840    // compute the invalid region
841    mSwapRegion.orSelf(mDirtyRegion);
842
843    if (CC_UNLIKELY(mDebugRegion)) {
844        debugFlashRegions();
845    }
846
847    // set the frame buffer
848    const DisplayHardware& hw(graphicPlane(0).displayHardware());
849    glMatrixMode(GL_MODELVIEW);
850    glLoadIdentity();
851
852    uint32_t flags = hw.getFlags();
853    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
854        (flags & DisplayHardware::BUFFER_PRESERVED))
855    {
856        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
857        // takes a rectangle, we must make sure to update that whole
858        // rectangle in that case
859        if (flags & DisplayHardware::SWAP_RECTANGLE) {
860            // TODO: we really should be able to pass a region to
861            // SWAP_RECTANGLE so that we don't have to redraw all this.
862            mDirtyRegion.set(mSwapRegion.bounds());
863        } else {
864            // in the BUFFER_PRESERVED case, obviously, we can update only
865            // what's needed and nothing more.
866            // NOTE: this is NOT a common case, as preserving the backbuffer
867            // is costly and usually involves copying the whole update back.
868        }
869    } else {
870        if (flags & DisplayHardware::PARTIAL_UPDATES) {
871            // We need to redraw the rectangle that will be updated
872            // (pushed to the framebuffer).
873            // This is needed because PARTIAL_UPDATES only takes one
874            // rectangle instead of a region (see DisplayHardware::flip())
875            mDirtyRegion.set(mSwapRegion.bounds());
876        } else {
877            // we need to redraw everything (the whole screen)
878            mDirtyRegion.set(hw.bounds());
879            mSwapRegion = mDirtyRegion;
880        }
881    }
882
883    setupHardwareComposer(mDirtyRegion);
884    composeSurfaces(mDirtyRegion);
885
886    // update the swap region and clear the dirty region
887    mSwapRegion.orSelf(mDirtyRegion);
888    mDirtyRegion.clear();
889}
890
891void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
892{
893    const DisplayHardware& hw(graphicPlane(0).displayHardware());
894    HWComposer& hwc(hw.getHwComposer());
895    hwc_layer_t* const cur(hwc.getLayers());
896    if (!cur) {
897        return;
898    }
899
900    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
901    size_t count = layers.size();
902
903    ALOGE_IF(hwc.getNumLayers() != count,
904            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
905            hwc.getNumLayers(), count);
906
907    // just to be extra-safe, use the smallest count
908    if (hwc.initCheck() == NO_ERROR) {
909        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
910    }
911
912    /*
913     *  update the per-frame h/w composer data for each layer
914     *  and build the transparent region of the FB
915     */
916    for (size_t i=0 ; i<count ; i++) {
917        const sp<LayerBase>& layer(layers[i]);
918        layer->setPerFrameData(&cur[i]);
919    }
920    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
921    status_t err = hwc.prepare();
922    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
923
924    if (err == NO_ERROR) {
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        //
936        // However, the content of the framebuffer cannot be trusted when
937        // we switch to/from FB/OVERLAY, in which case we need to
938        // expand the dirty region to those areas too.
939        //
940        // Note also that there is a special case when switching from
941        // "no layers in FB" to "some layers in FB", where we need to redraw
942        // the entire FB, since some areas might contain uninitialized
943        // data.
944        //
945        // Also we want to make sure to not clear areas that belong to
946        // layers above that won't redraw (we would just be erasing them),
947        // that is, we can't erase anything outside the dirty region.
948
949        Region transparent;
950
951        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
952            transparent.set(hw.getBounds());
953            dirtyInOut = transparent;
954        } else {
955            for (size_t i=0 ; i<count ; i++) {
956                const sp<LayerBase>& layer(layers[i]);
957                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
958                    transparent.orSelf(layer->visibleRegionScreen);
959                }
960                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
961                if (isOverlay != layer->isOverlay()) {
962                    // we transitioned to/from overlay, so add this layer
963                    // to the dirty region so the framebuffer can be either
964                    // cleared or redrawn.
965                    dirtyInOut.orSelf(layer->visibleRegionScreen);
966                }
967                layer->setOverlay(isOverlay);
968            }
969            // don't erase stuff outside the dirty region
970            transparent.andSelf(dirtyInOut);
971        }
972
973        /*
974         *  clear the area of the FB that need to be transparent
975         */
976        if (!transparent.isEmpty()) {
977            glClearColor(0,0,0,0);
978            Region::const_iterator it = transparent.begin();
979            Region::const_iterator const end = transparent.end();
980            const int32_t height = hw.getHeight();
981            while (it != end) {
982                const Rect& r(*it++);
983                const GLint sy = height - (r.top + r.height());
984                glScissor(r.left, sy, r.width(), r.height());
985                glClear(GL_COLOR_BUFFER_BIT);
986            }
987        }
988    }
989}
990
991void SurfaceFlinger::composeSurfaces(const Region& dirty)
992{
993    const DisplayHardware& hw(graphicPlane(0).displayHardware());
994    HWComposer& hwc(hw.getHwComposer());
995
996    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
997    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
998        // should never happen unless the window manager has a bug
999        // draw something...
1000        drawWormhole();
1001    }
1002
1003    /*
1004     * and then, render the layers targeted at the framebuffer
1005     */
1006    hwc_layer_t* const cur(hwc.getLayers());
1007    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1008    size_t count = layers.size();
1009    for (size_t i=0 ; i<count ; i++) {
1010        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1011            continue;
1012        }
1013        const sp<LayerBase>& layer(layers[i]);
1014        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1015        if (!clip.isEmpty()) {
1016            layer->draw(clip);
1017        }
1018    }
1019}
1020
1021void SurfaceFlinger::debugFlashRegions()
1022{
1023    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1024    const uint32_t flags = hw.getFlags();
1025    const int32_t height = hw.getHeight();
1026    if (mSwapRegion.isEmpty()) {
1027        return;
1028    }
1029
1030    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1031            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1032        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1033                mDirtyRegion.bounds() : hw.bounds());
1034        composeSurfaces(repaint);
1035    }
1036
1037    glDisable(GL_TEXTURE_EXTERNAL_OES);
1038    glDisable(GL_TEXTURE_2D);
1039    glDisable(GL_BLEND);
1040    glDisable(GL_SCISSOR_TEST);
1041
1042    static int toggle = 0;
1043    toggle = 1 - toggle;
1044    if (toggle) {
1045        glColor4f(1, 0, 1, 1);
1046    } else {
1047        glColor4f(1, 1, 0, 1);
1048    }
1049
1050    Region::const_iterator it = mDirtyRegion.begin();
1051    Region::const_iterator const end = mDirtyRegion.end();
1052    while (it != end) {
1053        const Rect& r = *it++;
1054        GLfloat vertices[][2] = {
1055                { r.left,  height - r.top },
1056                { r.left,  height - r.bottom },
1057                { r.right, height - r.bottom },
1058                { r.right, height - r.top }
1059        };
1060        glVertexPointer(2, GL_FLOAT, 0, vertices);
1061        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1062    }
1063
1064    hw.flip(mSwapRegion);
1065
1066    if (mDebugRegion > 1)
1067        usleep(mDebugRegion * 1000);
1068
1069    glEnable(GL_SCISSOR_TEST);
1070}
1071
1072void SurfaceFlinger::drawWormhole() const
1073{
1074    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1075    if (region.isEmpty())
1076        return;
1077
1078    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1079    const int32_t width = hw.getWidth();
1080    const int32_t height = hw.getHeight();
1081
1082    if (CC_LIKELY(!mDebugBackground)) {
1083        glClearColor(0,0,0,0);
1084        Region::const_iterator it = region.begin();
1085        Region::const_iterator const end = region.end();
1086        while (it != end) {
1087            const Rect& r = *it++;
1088            const GLint sy = height - (r.top + r.height());
1089            glScissor(r.left, sy, r.width(), r.height());
1090            glClear(GL_COLOR_BUFFER_BIT);
1091        }
1092    } else {
1093        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1094                { width, height }, { 0, height }  };
1095        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1096
1097        glVertexPointer(2, GL_SHORT, 0, vertices);
1098        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1099        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1100
1101        glDisable(GL_TEXTURE_EXTERNAL_OES);
1102        glEnable(GL_TEXTURE_2D);
1103        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1104        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1105        glMatrixMode(GL_TEXTURE);
1106        glLoadIdentity();
1107
1108        glDisable(GL_BLEND);
1109
1110        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1111        Region::const_iterator it = region.begin();
1112        Region::const_iterator const end = region.end();
1113        while (it != end) {
1114            const Rect& r = *it++;
1115            const GLint sy = height - (r.top + r.height());
1116            glScissor(r.left, sy, r.width(), r.height());
1117            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1118        }
1119        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1120        glDisable(GL_TEXTURE_2D);
1121        glLoadIdentity();
1122        glMatrixMode(GL_MODELVIEW);
1123    }
1124}
1125
1126status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1127{
1128    Mutex::Autolock _l(mStateLock);
1129    addLayer_l(layer);
1130    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1131    return NO_ERROR;
1132}
1133
1134status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1135{
1136    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1137    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1138}
1139
1140ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1141        const sp<LayerBaseClient>& lbc)
1142{
1143    // attach this layer to the client
1144    size_t name = client->attachLayer(lbc);
1145
1146    Mutex::Autolock _l(mStateLock);
1147
1148    // add this layer to the current state list
1149    addLayer_l(lbc);
1150
1151    return ssize_t(name);
1152}
1153
1154status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1155{
1156    Mutex::Autolock _l(mStateLock);
1157    status_t err = purgatorizeLayer_l(layer);
1158    if (err == NO_ERROR)
1159        setTransactionFlags(eTransactionNeeded);
1160    return err;
1161}
1162
1163status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1164{
1165    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1166    if (lbc != 0) {
1167        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1168    }
1169    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1170    if (index >= 0) {
1171        mLayersRemoved = true;
1172        return NO_ERROR;
1173    }
1174    return status_t(index);
1175}
1176
1177status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1178{
1179    // First add the layer to the purgatory list, which makes sure it won't
1180    // go away, then remove it from the main list (through a transaction).
1181    ssize_t err = removeLayer_l(layerBase);
1182    if (err >= 0) {
1183        mLayerPurgatory.add(layerBase);
1184    }
1185
1186    mLayersPendingRemoval.push(layerBase);
1187
1188    // it's possible that we don't find a layer, because it might
1189    // have been destroyed already -- this is not technically an error
1190    // from the user because there is a race between Client::destroySurface(),
1191    // ~Client() and ~ISurface().
1192    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1193}
1194
1195status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1196{
1197    layer->forceVisibilityTransaction();
1198    setTransactionFlags(eTraversalNeeded);
1199    return NO_ERROR;
1200}
1201
1202uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1203{
1204    return android_atomic_release_load(&mTransactionFlags);
1205}
1206
1207uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1208{
1209    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1210}
1211
1212uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1213{
1214    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1215    if ((old & flags)==0) { // wake the server up
1216        signalTransaction();
1217    }
1218    return old;
1219}
1220
1221
1222void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1223        int orientation, uint32_t flags) {
1224    Mutex::Autolock _l(mStateLock);
1225
1226    uint32_t transactionFlags = 0;
1227    if (mCurrentState.orientation != orientation) {
1228        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1229            mCurrentState.orientation = orientation;
1230            transactionFlags |= eTransactionNeeded;
1231        } else if (orientation != eOrientationUnchanged) {
1232            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1233                    orientation);
1234        }
1235    }
1236
1237    const size_t count = state.size();
1238    for (size_t i=0 ; i<count ; i++) {
1239        const ComposerState& s(state[i]);
1240        sp<Client> client( static_cast<Client *>(s.client.get()) );
1241        transactionFlags |= setClientStateLocked(client, s.state);
1242    }
1243
1244    if (transactionFlags) {
1245        // this triggers the transaction
1246        setTransactionFlags(transactionFlags);
1247
1248        // if this is a synchronous transaction, wait for it to take effect
1249        // before returning.
1250        if (flags & eSynchronous) {
1251            mTransationPending = true;
1252        }
1253        while (mTransationPending) {
1254            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1255            if (CC_UNLIKELY(err != NO_ERROR)) {
1256                // just in case something goes wrong in SF, return to the
1257                // called after a few seconds.
1258                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1259                mTransationPending = false;
1260                break;
1261            }
1262        }
1263    }
1264}
1265
1266sp<ISurface> SurfaceFlinger::createSurface(
1267        ISurfaceComposerClient::surface_data_t* params,
1268        const String8& name,
1269        const sp<Client>& client,
1270        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1271        uint32_t flags)
1272{
1273    sp<LayerBaseClient> layer;
1274    sp<ISurface> surfaceHandle;
1275
1276    if (int32_t(w|h) < 0) {
1277        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1278                int(w), int(h));
1279        return surfaceHandle;
1280    }
1281
1282    //ALOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1283    sp<Layer> normalLayer;
1284    switch (flags & eFXSurfaceMask) {
1285        case eFXSurfaceNormal:
1286            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1287            layer = normalLayer;
1288            break;
1289        case eFXSurfaceBlur:
1290            // for now we treat Blur as Dim, until we can implement it
1291            // efficiently.
1292        case eFXSurfaceDim:
1293            layer = createDimSurface(client, d, w, h, flags);
1294            break;
1295        case eFXSurfaceScreenshot:
1296            layer = createScreenshotSurface(client, d, w, h, flags);
1297            break;
1298    }
1299
1300    if (layer != 0) {
1301        layer->initStates(w, h, flags);
1302        layer->setName(name);
1303        ssize_t token = addClientLayer(client, layer);
1304
1305        surfaceHandle = layer->getSurface();
1306        if (surfaceHandle != 0) {
1307            params->token = token;
1308            params->identity = layer->getIdentity();
1309            if (normalLayer != 0) {
1310                Mutex::Autolock _l(mStateLock);
1311                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1312            }
1313        }
1314
1315        setTransactionFlags(eTransactionNeeded);
1316    }
1317
1318    return surfaceHandle;
1319}
1320
1321sp<Layer> SurfaceFlinger::createNormalSurface(
1322        const sp<Client>& client, DisplayID display,
1323        uint32_t w, uint32_t h, uint32_t flags,
1324        PixelFormat& format)
1325{
1326    // initialize the surfaces
1327    switch (format) { // TODO: take h/w into account
1328    case PIXEL_FORMAT_TRANSPARENT:
1329    case PIXEL_FORMAT_TRANSLUCENT:
1330        format = PIXEL_FORMAT_RGBA_8888;
1331        break;
1332    case PIXEL_FORMAT_OPAQUE:
1333#ifdef NO_RGBX_8888
1334        format = PIXEL_FORMAT_RGB_565;
1335#else
1336        format = PIXEL_FORMAT_RGBX_8888;
1337#endif
1338        break;
1339    }
1340
1341#ifdef NO_RGBX_8888
1342    if (format == PIXEL_FORMAT_RGBX_8888)
1343        format = PIXEL_FORMAT_RGBA_8888;
1344#endif
1345
1346    sp<Layer> layer = new Layer(this, display, client);
1347    status_t err = layer->setBuffers(w, h, format, flags);
1348    if (CC_LIKELY(err != NO_ERROR)) {
1349        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1350        layer.clear();
1351    }
1352    return layer;
1353}
1354
1355sp<LayerDim> SurfaceFlinger::createDimSurface(
1356        const sp<Client>& client, DisplayID display,
1357        uint32_t w, uint32_t h, uint32_t flags)
1358{
1359    sp<LayerDim> layer = new LayerDim(this, display, client);
1360    return layer;
1361}
1362
1363sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1364        const sp<Client>& client, DisplayID display,
1365        uint32_t w, uint32_t h, uint32_t flags)
1366{
1367    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1368    return layer;
1369}
1370
1371status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1372{
1373    /*
1374     * called by the window manager, when a surface should be marked for
1375     * destruction.
1376     *
1377     * The surface is removed from the current and drawing lists, but placed
1378     * in the purgatory queue, so it's not destroyed right-away (we need
1379     * to wait for all client's references to go away first).
1380     */
1381
1382    status_t err = NAME_NOT_FOUND;
1383    Mutex::Autolock _l(mStateLock);
1384    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1385    if (layer != 0) {
1386        err = purgatorizeLayer_l(layer);
1387        if (err == NO_ERROR) {
1388            setTransactionFlags(eTransactionNeeded);
1389        }
1390    }
1391    return err;
1392}
1393
1394status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1395{
1396    // called by ~ISurface() when all references are gone
1397    status_t err = NO_ERROR;
1398    sp<LayerBaseClient> l(layer.promote());
1399    if (l != NULL) {
1400        Mutex::Autolock _l(mStateLock);
1401        err = removeLayer_l(l);
1402        if (err == NAME_NOT_FOUND) {
1403            // The surface wasn't in the current list, which means it was
1404            // removed already, which means it is in the purgatory,
1405            // and need to be removed from there.
1406            ssize_t idx = mLayerPurgatory.remove(l);
1407            ALOGE_IF(idx < 0,
1408                    "layer=%p is not in the purgatory list", l.get());
1409        }
1410        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1411                "error removing layer=%p (%s)", l.get(), strerror(-err));
1412    }
1413    return err;
1414}
1415
1416uint32_t SurfaceFlinger::setClientStateLocked(
1417        const sp<Client>& client,
1418        const layer_state_t& s)
1419{
1420    uint32_t flags = 0;
1421    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1422    if (layer != 0) {
1423        const uint32_t what = s.what;
1424        if (what & ePositionChanged) {
1425            if (layer->setPosition(s.x, s.y))
1426                flags |= eTraversalNeeded;
1427        }
1428        if (what & eLayerChanged) {
1429            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1430            if (layer->setLayer(s.z)) {
1431                mCurrentState.layersSortedByZ.removeAt(idx);
1432                mCurrentState.layersSortedByZ.add(layer);
1433                // we need traversal (state changed)
1434                // AND transaction (list changed)
1435                flags |= eTransactionNeeded|eTraversalNeeded;
1436            }
1437        }
1438        if (what & eSizeChanged) {
1439            if (layer->setSize(s.w, s.h)) {
1440                flags |= eTraversalNeeded;
1441            }
1442        }
1443        if (what & eAlphaChanged) {
1444            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1445                flags |= eTraversalNeeded;
1446        }
1447        if (what & eMatrixChanged) {
1448            if (layer->setMatrix(s.matrix))
1449                flags |= eTraversalNeeded;
1450        }
1451        if (what & eTransparentRegionChanged) {
1452            if (layer->setTransparentRegionHint(s.transparentRegion))
1453                flags |= eTraversalNeeded;
1454        }
1455        if (what & eVisibilityChanged) {
1456            if (layer->setFlags(s.flags, s.mask))
1457                flags |= eTraversalNeeded;
1458        }
1459    }
1460    return flags;
1461}
1462
1463void SurfaceFlinger::screenReleased(int dpy)
1464{
1465    // this may be called by a signal handler, we can't do too much in here
1466    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1467    signalTransaction();
1468}
1469
1470void SurfaceFlinger::screenAcquired(int dpy)
1471{
1472    // this may be called by a signal handler, we can't do too much in here
1473    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1474    signalTransaction();
1475}
1476
1477status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1478{
1479    const size_t SIZE = 4096;
1480    char buffer[SIZE];
1481    String8 result;
1482
1483    if (!PermissionCache::checkCallingPermission(sDump)) {
1484        snprintf(buffer, SIZE, "Permission Denial: "
1485                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1486                IPCThreadState::self()->getCallingPid(),
1487                IPCThreadState::self()->getCallingUid());
1488        result.append(buffer);
1489    } else {
1490        // Try to get the main lock, but don't insist if we can't
1491        // (this would indicate SF is stuck, but we want to be able to
1492        // print something in dumpsys).
1493        int retry = 3;
1494        while (mStateLock.tryLock()<0 && --retry>=0) {
1495            usleep(1000000);
1496        }
1497        const bool locked(retry >= 0);
1498        if (!locked) {
1499            snprintf(buffer, SIZE,
1500                    "SurfaceFlinger appears to be unresponsive, "
1501                    "dumping anyways (no locks held)\n");
1502            result.append(buffer);
1503        }
1504
1505        bool dumpAll = true;
1506        size_t index = 0;
1507        size_t numArgs = args.size();
1508        if (numArgs) {
1509            dumpAll = false;
1510
1511            if ((index < numArgs) &&
1512                    (args[index] == String16("--list"))) {
1513                index++;
1514                listLayersLocked(args, index, result, buffer, SIZE);
1515            }
1516
1517            if ((index < numArgs) &&
1518                    (args[index] == String16("--latency"))) {
1519                index++;
1520                dumpStatsLocked(args, index, result, buffer, SIZE);
1521            }
1522
1523            if ((index < numArgs) &&
1524                    (args[index] == String16("--latency-clear"))) {
1525                index++;
1526                clearStatsLocked(args, index, result, buffer, SIZE);
1527            }
1528        }
1529
1530        if (dumpAll) {
1531            dumpAllLocked(result, buffer, SIZE);
1532        }
1533
1534        if (locked) {
1535            mStateLock.unlock();
1536        }
1537    }
1538    write(fd, result.string(), result.size());
1539    return NO_ERROR;
1540}
1541
1542void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1543        String8& result, char* buffer, size_t SIZE) const
1544{
1545    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1546    const size_t count = currentLayers.size();
1547    for (size_t i=0 ; i<count ; i++) {
1548        const sp<LayerBase>& layer(currentLayers[i]);
1549        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1550        result.append(buffer);
1551    }
1552}
1553
1554void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1555        String8& result, char* buffer, size_t SIZE) const
1556{
1557    String8 name;
1558    if (index < args.size()) {
1559        name = String8(args[index]);
1560        index++;
1561    }
1562
1563    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1564    const size_t count = currentLayers.size();
1565    for (size_t i=0 ; i<count ; i++) {
1566        const sp<LayerBase>& layer(currentLayers[i]);
1567        if (name.isEmpty()) {
1568            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1569            result.append(buffer);
1570        }
1571        if (name.isEmpty() || (name == layer->getName())) {
1572            layer->dumpStats(result, buffer, SIZE);
1573        }
1574    }
1575}
1576
1577void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1578        String8& result, char* buffer, size_t SIZE) const
1579{
1580    String8 name;
1581    if (index < args.size()) {
1582        name = String8(args[index]);
1583        index++;
1584    }
1585
1586    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1587    const size_t count = currentLayers.size();
1588    for (size_t i=0 ; i<count ; i++) {
1589        const sp<LayerBase>& layer(currentLayers[i]);
1590        if (name.isEmpty() || (name == layer->getName())) {
1591            layer->clearStats();
1592        }
1593    }
1594}
1595
1596void SurfaceFlinger::dumpAllLocked(
1597        String8& result, char* buffer, size_t SIZE) const
1598{
1599    // figure out if we're stuck somewhere
1600    const nsecs_t now = systemTime();
1601    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1602    const nsecs_t inTransaction(mDebugInTransaction);
1603    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1604    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1605
1606    /*
1607     * Dump the visible layer list
1608     */
1609    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1610    const size_t count = currentLayers.size();
1611    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1612    result.append(buffer);
1613    for (size_t i=0 ; i<count ; i++) {
1614        const sp<LayerBase>& layer(currentLayers[i]);
1615        layer->dump(result, buffer, SIZE);
1616    }
1617
1618    /*
1619     * Dump the layers in the purgatory
1620     */
1621
1622    const size_t purgatorySize = mLayerPurgatory.size();
1623    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1624    result.append(buffer);
1625    for (size_t i=0 ; i<purgatorySize ; i++) {
1626        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1627        layer->shortDump(result, buffer, SIZE);
1628    }
1629
1630    /*
1631     * Dump SurfaceFlinger global state
1632     */
1633
1634    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1635    result.append(buffer);
1636
1637    const GLExtensions& extensions(GLExtensions::getInstance());
1638    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1639            extensions.getVendor(),
1640            extensions.getRenderer(),
1641            extensions.getVersion());
1642    result.append(buffer);
1643
1644    snprintf(buffer, SIZE, "EGL : %s\n",
1645            eglQueryString(graphicPlane(0).getEGLDisplay(),
1646                    EGL_VERSION_HW_ANDROID));
1647    result.append(buffer);
1648
1649    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1650    result.append(buffer);
1651
1652    mWormholeRegion.dump(result, "WormholeRegion");
1653    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1654    snprintf(buffer, SIZE,
1655            "  orientation=%d, canDraw=%d\n",
1656            mCurrentState.orientation, hw.canDraw());
1657    result.append(buffer);
1658    snprintf(buffer, SIZE,
1659            "  last eglSwapBuffers() time: %f us\n"
1660            "  last transaction time     : %f us\n"
1661            "  transaction-flags         : %08x\n"
1662            "  refresh-rate              : %f fps\n"
1663            "  x-dpi                     : %f\n"
1664            "  y-dpi                     : %f\n",
1665            mLastSwapBufferTime/1000.0,
1666            mLastTransactionTime/1000.0,
1667            mTransactionFlags,
1668            hw.getRefreshRate(),
1669            hw.getDpiX(),
1670            hw.getDpiY());
1671    result.append(buffer);
1672
1673    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1674            inSwapBuffersDuration/1000.0);
1675    result.append(buffer);
1676
1677    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1678            inTransactionDuration/1000.0);
1679    result.append(buffer);
1680
1681    /*
1682     * VSYNC state
1683     */
1684    mEventThread->dump(result, buffer, SIZE);
1685
1686    /*
1687     * Dump HWComposer state
1688     */
1689    HWComposer& hwc(hw.getHwComposer());
1690    snprintf(buffer, SIZE, "h/w composer state:\n");
1691    result.append(buffer);
1692    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1693            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1694                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1695    result.append(buffer);
1696    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1697
1698    /*
1699     * Dump gralloc state
1700     */
1701    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1702    alloc.dump(result);
1703    hw.dump(result);
1704}
1705
1706status_t SurfaceFlinger::onTransact(
1707    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1708{
1709    switch (code) {
1710        case CREATE_CONNECTION:
1711        case SET_TRANSACTION_STATE:
1712        case SET_ORIENTATION:
1713        case BOOT_FINISHED:
1714        case TURN_ELECTRON_BEAM_OFF:
1715        case TURN_ELECTRON_BEAM_ON:
1716        {
1717            // codes that require permission check
1718            IPCThreadState* ipc = IPCThreadState::self();
1719            const int pid = ipc->getCallingPid();
1720            const int uid = ipc->getCallingUid();
1721            if ((uid != AID_GRAPHICS) &&
1722                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1723                ALOGE("Permission Denial: "
1724                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1725                return PERMISSION_DENIED;
1726            }
1727            break;
1728        }
1729        case CAPTURE_SCREEN:
1730        {
1731            // codes that require permission check
1732            IPCThreadState* ipc = IPCThreadState::self();
1733            const int pid = ipc->getCallingPid();
1734            const int uid = ipc->getCallingUid();
1735            if ((uid != AID_GRAPHICS) &&
1736                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1737                ALOGE("Permission Denial: "
1738                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1739                return PERMISSION_DENIED;
1740            }
1741            break;
1742        }
1743    }
1744
1745    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1746    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1747        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1748        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1749            IPCThreadState* ipc = IPCThreadState::self();
1750            const int pid = ipc->getCallingPid();
1751            const int uid = ipc->getCallingUid();
1752            ALOGE("Permission Denial: "
1753                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1754            return PERMISSION_DENIED;
1755        }
1756        int n;
1757        switch (code) {
1758            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1759            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1760                return NO_ERROR;
1761            case 1002:  // SHOW_UPDATES
1762                n = data.readInt32();
1763                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1764                invalidateHwcGeometry();
1765                repaintEverything();
1766                return NO_ERROR;
1767            case 1003:  // SHOW_BACKGROUND
1768                n = data.readInt32();
1769                mDebugBackground = n ? 1 : 0;
1770                return NO_ERROR;
1771            case 1004:{ // repaint everything
1772                repaintEverything();
1773                return NO_ERROR;
1774            }
1775            case 1005:{ // force transaction
1776                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1777                return NO_ERROR;
1778            }
1779            case 1006:{ // send empty update
1780                signalRefresh();
1781                return NO_ERROR;
1782            }
1783            case 1008:  // toggle use of hw composer
1784                n = data.readInt32();
1785                mDebugDisableHWC = n ? 1 : 0;
1786                invalidateHwcGeometry();
1787                repaintEverything();
1788                return NO_ERROR;
1789            case 1009:  // toggle use of transform hint
1790                n = data.readInt32();
1791                mDebugDisableTransformHint = n ? 1 : 0;
1792                invalidateHwcGeometry();
1793                repaintEverything();
1794                return NO_ERROR;
1795            case 1010:  // interrogate.
1796                reply->writeInt32(0);
1797                reply->writeInt32(0);
1798                reply->writeInt32(mDebugRegion);
1799                reply->writeInt32(mDebugBackground);
1800                reply->writeInt32(mDebugDisableHWC);
1801                return NO_ERROR;
1802            case 1013: {
1803                Mutex::Autolock _l(mStateLock);
1804                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1805                reply->writeInt32(hw.getPageFlipCount());
1806            }
1807            return NO_ERROR;
1808        }
1809    }
1810    return err;
1811}
1812
1813void SurfaceFlinger::repaintEverything() {
1814    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1815    const Rect bounds(hw.getBounds());
1816    setInvalidateRegion(Region(bounds));
1817    signalTransaction();
1818}
1819
1820void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1821    Mutex::Autolock _l(mInvalidateLock);
1822    mInvalidateRegion = reg;
1823}
1824
1825Region SurfaceFlinger::getAndClearInvalidateRegion() {
1826    Mutex::Autolock _l(mInvalidateLock);
1827    Region reg(mInvalidateRegion);
1828    mInvalidateRegion.clear();
1829    return reg;
1830}
1831
1832// ---------------------------------------------------------------------------
1833
1834status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1835        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1836{
1837    Mutex::Autolock _l(mStateLock);
1838    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1839}
1840
1841status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1842        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1843{
1844    if (!GLExtensions::getInstance().haveFramebufferObject())
1845        return INVALID_OPERATION;
1846
1847    // get screen geometry
1848    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1849    const uint32_t hw_w = hw.getWidth();
1850    const uint32_t hw_h = hw.getHeight();
1851    GLfloat u = 1;
1852    GLfloat v = 1;
1853
1854    // make sure to clear all GL error flags
1855    while ( glGetError() != GL_NO_ERROR ) ;
1856
1857    // create a FBO
1858    GLuint name, tname;
1859    glGenTextures(1, &tname);
1860    glBindTexture(GL_TEXTURE_2D, tname);
1861    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1862            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1863    if (glGetError() != GL_NO_ERROR) {
1864        while ( glGetError() != GL_NO_ERROR ) ;
1865        GLint tw = (2 << (31 - clz(hw_w)));
1866        GLint th = (2 << (31 - clz(hw_h)));
1867        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1868                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1869        u = GLfloat(hw_w) / tw;
1870        v = GLfloat(hw_h) / th;
1871    }
1872    glGenFramebuffersOES(1, &name);
1873    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1874    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1875            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1876
1877    // redraw the screen entirely...
1878    glDisable(GL_TEXTURE_EXTERNAL_OES);
1879    glDisable(GL_TEXTURE_2D);
1880    glDisable(GL_SCISSOR_TEST);
1881    glClearColor(0,0,0,1);
1882    glClear(GL_COLOR_BUFFER_BIT);
1883    glEnable(GL_SCISSOR_TEST);
1884    glMatrixMode(GL_MODELVIEW);
1885    glLoadIdentity();
1886    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1887    const size_t count = layers.size();
1888    for (size_t i=0 ; i<count ; ++i) {
1889        const sp<LayerBase>& layer(layers[i]);
1890        layer->drawForSreenShot();
1891    }
1892
1893    hw.compositionComplete();
1894
1895    // back to main framebuffer
1896    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1897    glDisable(GL_SCISSOR_TEST);
1898    glDeleteFramebuffersOES(1, &name);
1899
1900    *textureName = tname;
1901    *uOut = u;
1902    *vOut = v;
1903    return NO_ERROR;
1904}
1905
1906// ---------------------------------------------------------------------------
1907
1908status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1909{
1910    // get screen geometry
1911    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1912    const uint32_t hw_w = hw.getWidth();
1913    const uint32_t hw_h = hw.getHeight();
1914    const Region screenBounds(hw.getBounds());
1915
1916    GLfloat u, v;
1917    GLuint tname;
1918    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1919    if (result != NO_ERROR) {
1920        return result;
1921    }
1922
1923    GLfloat vtx[8];
1924    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1925    glBindTexture(GL_TEXTURE_2D, tname);
1926    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1927    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1928    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1929    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1930    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1931    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1932    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1933    glVertexPointer(2, GL_FLOAT, 0, vtx);
1934
1935    /*
1936     * Texture coordinate mapping
1937     *
1938     *                 u
1939     *    1 +----------+---+
1940     *      |     |    |   |  image is inverted
1941     *      |     V    |   |  w.r.t. the texture
1942     *  1-v +----------+   |  coordinates
1943     *      |              |
1944     *      |              |
1945     *      |              |
1946     *    0 +--------------+
1947     *      0              1
1948     *
1949     */
1950
1951    class s_curve_interpolator {
1952        const float nbFrames, s, v;
1953    public:
1954        s_curve_interpolator(int nbFrames, float s)
1955        : nbFrames(1.0f / (nbFrames-1)), s(s),
1956          v(1.0f + expf(-s + 0.5f*s)) {
1957        }
1958        float operator()(int f) {
1959            const float x = f * nbFrames;
1960            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1961        }
1962    };
1963
1964    class v_stretch {
1965        const GLfloat hw_w, hw_h;
1966    public:
1967        v_stretch(uint32_t hw_w, uint32_t hw_h)
1968        : hw_w(hw_w), hw_h(hw_h) {
1969        }
1970        void operator()(GLfloat* vtx, float v) {
1971            const GLfloat w = hw_w + (hw_w * v);
1972            const GLfloat h = hw_h - (hw_h * v);
1973            const GLfloat x = (hw_w - w) * 0.5f;
1974            const GLfloat y = (hw_h - h) * 0.5f;
1975            vtx[0] = x;         vtx[1] = y;
1976            vtx[2] = x;         vtx[3] = y + h;
1977            vtx[4] = x + w;     vtx[5] = y + h;
1978            vtx[6] = x + w;     vtx[7] = y;
1979        }
1980    };
1981
1982    class h_stretch {
1983        const GLfloat hw_w, hw_h;
1984    public:
1985        h_stretch(uint32_t hw_w, uint32_t hw_h)
1986        : hw_w(hw_w), hw_h(hw_h) {
1987        }
1988        void operator()(GLfloat* vtx, float v) {
1989            const GLfloat w = hw_w - (hw_w * v);
1990            const GLfloat h = 1.0f;
1991            const GLfloat x = (hw_w - w) * 0.5f;
1992            const GLfloat y = (hw_h - h) * 0.5f;
1993            vtx[0] = x;         vtx[1] = y;
1994            vtx[2] = x;         vtx[3] = y + h;
1995            vtx[4] = x + w;     vtx[5] = y + h;
1996            vtx[6] = x + w;     vtx[7] = y;
1997        }
1998    };
1999
2000    // the full animation is 24 frames
2001    char value[PROPERTY_VALUE_MAX];
2002    property_get("debug.sf.electron_frames", value, "24");
2003    int nbFrames = (atoi(value) + 1) >> 1;
2004    if (nbFrames <= 0) // just in case
2005        nbFrames = 24;
2006
2007    s_curve_interpolator itr(nbFrames, 7.5f);
2008    s_curve_interpolator itg(nbFrames, 8.0f);
2009    s_curve_interpolator itb(nbFrames, 8.5f);
2010
2011    v_stretch vverts(hw_w, hw_h);
2012
2013    glMatrixMode(GL_TEXTURE);
2014    glLoadIdentity();
2015    glMatrixMode(GL_MODELVIEW);
2016    glLoadIdentity();
2017
2018    glEnable(GL_BLEND);
2019    glBlendFunc(GL_ONE, GL_ONE);
2020    for (int i=0 ; i<nbFrames ; i++) {
2021        float x, y, w, h;
2022        const float vr = itr(i);
2023        const float vg = itg(i);
2024        const float vb = itb(i);
2025
2026        // clear screen
2027        glColorMask(1,1,1,1);
2028        glClear(GL_COLOR_BUFFER_BIT);
2029        glEnable(GL_TEXTURE_2D);
2030
2031        // draw the red plane
2032        vverts(vtx, vr);
2033        glColorMask(1,0,0,1);
2034        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2035
2036        // draw the green plane
2037        vverts(vtx, vg);
2038        glColorMask(0,1,0,1);
2039        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2040
2041        // draw the blue plane
2042        vverts(vtx, vb);
2043        glColorMask(0,0,1,1);
2044        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2045
2046        // draw the white highlight (we use the last vertices)
2047        glDisable(GL_TEXTURE_2D);
2048        glColorMask(1,1,1,1);
2049        glColor4f(vg, vg, vg, 1);
2050        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2051        hw.flip(screenBounds);
2052    }
2053
2054    h_stretch hverts(hw_w, hw_h);
2055    glDisable(GL_BLEND);
2056    glDisable(GL_TEXTURE_2D);
2057    glColorMask(1,1,1,1);
2058    for (int i=0 ; i<nbFrames ; i++) {
2059        const float v = itg(i);
2060        hverts(vtx, v);
2061        glClear(GL_COLOR_BUFFER_BIT);
2062        glColor4f(1-v, 1-v, 1-v, 1);
2063        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2064        hw.flip(screenBounds);
2065    }
2066
2067    glColorMask(1,1,1,1);
2068    glEnable(GL_SCISSOR_TEST);
2069    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2070    glDeleteTextures(1, &tname);
2071    glDisable(GL_TEXTURE_2D);
2072    glDisable(GL_BLEND);
2073    return NO_ERROR;
2074}
2075
2076status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2077{
2078    status_t result = PERMISSION_DENIED;
2079
2080    if (!GLExtensions::getInstance().haveFramebufferObject())
2081        return INVALID_OPERATION;
2082
2083
2084    // get screen geometry
2085    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2086    const uint32_t hw_w = hw.getWidth();
2087    const uint32_t hw_h = hw.getHeight();
2088    const Region screenBounds(hw.bounds());
2089
2090    GLfloat u, v;
2091    GLuint tname;
2092    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2093    if (result != NO_ERROR) {
2094        return result;
2095    }
2096
2097    GLfloat vtx[8];
2098    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2099    glBindTexture(GL_TEXTURE_2D, tname);
2100    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2101    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2102    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2103    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2104    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2105    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2106    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2107    glVertexPointer(2, GL_FLOAT, 0, vtx);
2108
2109    class s_curve_interpolator {
2110        const float nbFrames, s, v;
2111    public:
2112        s_curve_interpolator(int nbFrames, float s)
2113        : nbFrames(1.0f / (nbFrames-1)), s(s),
2114          v(1.0f + expf(-s + 0.5f*s)) {
2115        }
2116        float operator()(int f) {
2117            const float x = f * nbFrames;
2118            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2119        }
2120    };
2121
2122    class v_stretch {
2123        const GLfloat hw_w, hw_h;
2124    public:
2125        v_stretch(uint32_t hw_w, uint32_t hw_h)
2126        : hw_w(hw_w), hw_h(hw_h) {
2127        }
2128        void operator()(GLfloat* vtx, float v) {
2129            const GLfloat w = hw_w + (hw_w * v);
2130            const GLfloat h = hw_h - (hw_h * v);
2131            const GLfloat x = (hw_w - w) * 0.5f;
2132            const GLfloat y = (hw_h - h) * 0.5f;
2133            vtx[0] = x;         vtx[1] = y;
2134            vtx[2] = x;         vtx[3] = y + h;
2135            vtx[4] = x + w;     vtx[5] = y + h;
2136            vtx[6] = x + w;     vtx[7] = y;
2137        }
2138    };
2139
2140    class h_stretch {
2141        const GLfloat hw_w, hw_h;
2142    public:
2143        h_stretch(uint32_t hw_w, uint32_t hw_h)
2144        : hw_w(hw_w), hw_h(hw_h) {
2145        }
2146        void operator()(GLfloat* vtx, float v) {
2147            const GLfloat w = hw_w - (hw_w * v);
2148            const GLfloat h = 1.0f;
2149            const GLfloat x = (hw_w - w) * 0.5f;
2150            const GLfloat y = (hw_h - h) * 0.5f;
2151            vtx[0] = x;         vtx[1] = y;
2152            vtx[2] = x;         vtx[3] = y + h;
2153            vtx[4] = x + w;     vtx[5] = y + h;
2154            vtx[6] = x + w;     vtx[7] = y;
2155        }
2156    };
2157
2158    // the full animation is 12 frames
2159    int nbFrames = 8;
2160    s_curve_interpolator itr(nbFrames, 7.5f);
2161    s_curve_interpolator itg(nbFrames, 8.0f);
2162    s_curve_interpolator itb(nbFrames, 8.5f);
2163
2164    h_stretch hverts(hw_w, hw_h);
2165    glDisable(GL_BLEND);
2166    glDisable(GL_TEXTURE_2D);
2167    glColorMask(1,1,1,1);
2168    for (int i=nbFrames-1 ; i>=0 ; i--) {
2169        const float v = itg(i);
2170        hverts(vtx, v);
2171        glClear(GL_COLOR_BUFFER_BIT);
2172        glColor4f(1-v, 1-v, 1-v, 1);
2173        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2174        hw.flip(screenBounds);
2175    }
2176
2177    nbFrames = 4;
2178    v_stretch vverts(hw_w, hw_h);
2179    glEnable(GL_BLEND);
2180    glBlendFunc(GL_ONE, GL_ONE);
2181    for (int i=nbFrames-1 ; i>=0 ; i--) {
2182        float x, y, w, h;
2183        const float vr = itr(i);
2184        const float vg = itg(i);
2185        const float vb = itb(i);
2186
2187        // clear screen
2188        glColorMask(1,1,1,1);
2189        glClear(GL_COLOR_BUFFER_BIT);
2190        glEnable(GL_TEXTURE_2D);
2191
2192        // draw the red plane
2193        vverts(vtx, vr);
2194        glColorMask(1,0,0,1);
2195        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2196
2197        // draw the green plane
2198        vverts(vtx, vg);
2199        glColorMask(0,1,0,1);
2200        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2201
2202        // draw the blue plane
2203        vverts(vtx, vb);
2204        glColorMask(0,0,1,1);
2205        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2206
2207        hw.flip(screenBounds);
2208    }
2209
2210    glColorMask(1,1,1,1);
2211    glEnable(GL_SCISSOR_TEST);
2212    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2213    glDeleteTextures(1, &tname);
2214    glDisable(GL_TEXTURE_2D);
2215    glDisable(GL_BLEND);
2216
2217    return NO_ERROR;
2218}
2219
2220// ---------------------------------------------------------------------------
2221
2222status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2223{
2224    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2225    if (!hw.canDraw()) {
2226        // we're already off
2227        return NO_ERROR;
2228    }
2229
2230    // turn off hwc while we're doing the animation
2231    hw.getHwComposer().disable();
2232    // and make sure to turn it back on (if needed) next time we compose
2233    invalidateHwcGeometry();
2234
2235    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2236        electronBeamOffAnimationImplLocked();
2237    }
2238
2239    // always clear the whole screen at the end of the animation
2240    glClearColor(0,0,0,1);
2241    glDisable(GL_SCISSOR_TEST);
2242    glClear(GL_COLOR_BUFFER_BIT);
2243    glEnable(GL_SCISSOR_TEST);
2244    hw.flip( Region(hw.bounds()) );
2245
2246    return NO_ERROR;
2247}
2248
2249status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2250{
2251    class MessageTurnElectronBeamOff : public MessageBase {
2252        SurfaceFlinger* flinger;
2253        int32_t mode;
2254        status_t result;
2255    public:
2256        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2257            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2258        }
2259        status_t getResult() const {
2260            return result;
2261        }
2262        virtual bool handler() {
2263            Mutex::Autolock _l(flinger->mStateLock);
2264            result = flinger->turnElectronBeamOffImplLocked(mode);
2265            return true;
2266        }
2267    };
2268
2269    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2270    status_t res = postMessageSync(msg);
2271    if (res == NO_ERROR) {
2272        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2273
2274        // work-around: when the power-manager calls us we activate the
2275        // animation. eventually, the "on" animation will be called
2276        // by the power-manager itself
2277        mElectronBeamAnimationMode = mode;
2278    }
2279    return res;
2280}
2281
2282// ---------------------------------------------------------------------------
2283
2284status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2285{
2286    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2287    if (hw.canDraw()) {
2288        // we're already on
2289        return NO_ERROR;
2290    }
2291    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2292        electronBeamOnAnimationImplLocked();
2293    }
2294
2295    // make sure to redraw the whole screen when the animation is done
2296    mDirtyRegion.set(hw.bounds());
2297    signalTransaction();
2298
2299    return NO_ERROR;
2300}
2301
2302status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2303{
2304    class MessageTurnElectronBeamOn : public MessageBase {
2305        SurfaceFlinger* flinger;
2306        int32_t mode;
2307        status_t result;
2308    public:
2309        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2310            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2311        }
2312        status_t getResult() const {
2313            return result;
2314        }
2315        virtual bool handler() {
2316            Mutex::Autolock _l(flinger->mStateLock);
2317            result = flinger->turnElectronBeamOnImplLocked(mode);
2318            return true;
2319        }
2320    };
2321
2322    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2323    return NO_ERROR;
2324}
2325
2326// ---------------------------------------------------------------------------
2327
2328status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2329        sp<IMemoryHeap>* heap,
2330        uint32_t* w, uint32_t* h, PixelFormat* f,
2331        uint32_t sw, uint32_t sh,
2332        uint32_t minLayerZ, uint32_t maxLayerZ)
2333{
2334    status_t result = PERMISSION_DENIED;
2335
2336    // only one display supported for now
2337    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2338        return BAD_VALUE;
2339
2340    if (!GLExtensions::getInstance().haveFramebufferObject())
2341        return INVALID_OPERATION;
2342
2343    // get screen geometry
2344    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2345    const uint32_t hw_w = hw.getWidth();
2346    const uint32_t hw_h = hw.getHeight();
2347
2348    if ((sw > hw_w) || (sh > hw_h))
2349        return BAD_VALUE;
2350
2351    sw = (!sw) ? hw_w : sw;
2352    sh = (!sh) ? hw_h : sh;
2353    const size_t size = sw * sh * 4;
2354
2355    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2356    //        sw, sh, minLayerZ, maxLayerZ);
2357
2358    // make sure to clear all GL error flags
2359    while ( glGetError() != GL_NO_ERROR ) ;
2360
2361    // create a FBO
2362    GLuint name, tname;
2363    glGenRenderbuffersOES(1, &tname);
2364    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2365    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2366    glGenFramebuffersOES(1, &name);
2367    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2368    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2369            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2370
2371    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2372
2373    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2374
2375        // invert everything, b/c glReadPixel() below will invert the FB
2376        glViewport(0, 0, sw, sh);
2377        glScissor(0, 0, sw, sh);
2378        glEnable(GL_SCISSOR_TEST);
2379        glMatrixMode(GL_PROJECTION);
2380        glPushMatrix();
2381        glLoadIdentity();
2382        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2383        glMatrixMode(GL_MODELVIEW);
2384
2385        // redraw the screen entirely...
2386        glClearColor(0,0,0,1);
2387        glClear(GL_COLOR_BUFFER_BIT);
2388
2389        const LayerVector& layers(mDrawingState.layersSortedByZ);
2390        const size_t count = layers.size();
2391        for (size_t i=0 ; i<count ; ++i) {
2392            const sp<LayerBase>& layer(layers[i]);
2393            const uint32_t flags = layer->drawingState().flags;
2394            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2395                const uint32_t z = layer->drawingState().z;
2396                if (z >= minLayerZ && z <= maxLayerZ) {
2397                    layer->drawForSreenShot();
2398                }
2399            }
2400        }
2401
2402        // XXX: this is needed on tegra
2403        glEnable(GL_SCISSOR_TEST);
2404        glScissor(0, 0, sw, sh);
2405
2406        // check for errors and return screen capture
2407        if (glGetError() != GL_NO_ERROR) {
2408            // error while rendering
2409            result = INVALID_OPERATION;
2410        } else {
2411            // allocate shared memory large enough to hold the
2412            // screen capture
2413            sp<MemoryHeapBase> base(
2414                    new MemoryHeapBase(size, 0, "screen-capture") );
2415            void* const ptr = base->getBase();
2416            if (ptr) {
2417                // capture the screen with glReadPixels()
2418                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2419                if (glGetError() == GL_NO_ERROR) {
2420                    *heap = base;
2421                    *w = sw;
2422                    *h = sh;
2423                    *f = PIXEL_FORMAT_RGBA_8888;
2424                    result = NO_ERROR;
2425                }
2426            } else {
2427                result = NO_MEMORY;
2428            }
2429        }
2430        glEnable(GL_SCISSOR_TEST);
2431        glViewport(0, 0, hw_w, hw_h);
2432        glMatrixMode(GL_PROJECTION);
2433        glPopMatrix();
2434        glMatrixMode(GL_MODELVIEW);
2435    } else {
2436        result = BAD_VALUE;
2437    }
2438
2439    // release FBO resources
2440    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2441    glDeleteRenderbuffersOES(1, &tname);
2442    glDeleteFramebuffersOES(1, &name);
2443
2444    hw.compositionComplete();
2445
2446    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2447
2448    return result;
2449}
2450
2451
2452status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2453        sp<IMemoryHeap>* heap,
2454        uint32_t* width, uint32_t* height, PixelFormat* format,
2455        uint32_t sw, uint32_t sh,
2456        uint32_t minLayerZ, uint32_t maxLayerZ)
2457{
2458    // only one display supported for now
2459    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2460        return BAD_VALUE;
2461
2462    if (!GLExtensions::getInstance().haveFramebufferObject())
2463        return INVALID_OPERATION;
2464
2465    class MessageCaptureScreen : public MessageBase {
2466        SurfaceFlinger* flinger;
2467        DisplayID dpy;
2468        sp<IMemoryHeap>* heap;
2469        uint32_t* w;
2470        uint32_t* h;
2471        PixelFormat* f;
2472        uint32_t sw;
2473        uint32_t sh;
2474        uint32_t minLayerZ;
2475        uint32_t maxLayerZ;
2476        status_t result;
2477    public:
2478        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2479                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2480                uint32_t sw, uint32_t sh,
2481                uint32_t minLayerZ, uint32_t maxLayerZ)
2482            : flinger(flinger), dpy(dpy),
2483              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2484              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2485              result(PERMISSION_DENIED)
2486        {
2487        }
2488        status_t getResult() const {
2489            return result;
2490        }
2491        virtual bool handler() {
2492            Mutex::Autolock _l(flinger->mStateLock);
2493
2494            // if we have secure windows, never allow the screen capture
2495            if (flinger->mSecureFrameBuffer)
2496                return true;
2497
2498            result = flinger->captureScreenImplLocked(dpy,
2499                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2500
2501            return true;
2502        }
2503    };
2504
2505    sp<MessageBase> msg = new MessageCaptureScreen(this,
2506            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2507    status_t res = postMessageSync(msg);
2508    if (res == NO_ERROR) {
2509        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2510    }
2511    return res;
2512}
2513
2514// ---------------------------------------------------------------------------
2515
2516sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2517{
2518    sp<Layer> result;
2519    Mutex::Autolock _l(mStateLock);
2520    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2521    return result;
2522}
2523
2524// ---------------------------------------------------------------------------
2525
2526Client::Client(const sp<SurfaceFlinger>& flinger)
2527    : mFlinger(flinger), mNameGenerator(1)
2528{
2529}
2530
2531Client::~Client()
2532{
2533    const size_t count = mLayers.size();
2534    for (size_t i=0 ; i<count ; i++) {
2535        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2536        if (layer != 0) {
2537            mFlinger->removeLayer(layer);
2538        }
2539    }
2540}
2541
2542status_t Client::initCheck() const {
2543    return NO_ERROR;
2544}
2545
2546size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2547{
2548    Mutex::Autolock _l(mLock);
2549    size_t name = mNameGenerator++;
2550    mLayers.add(name, layer);
2551    return name;
2552}
2553
2554void Client::detachLayer(const LayerBaseClient* layer)
2555{
2556    Mutex::Autolock _l(mLock);
2557    // we do a linear search here, because this doesn't happen often
2558    const size_t count = mLayers.size();
2559    for (size_t i=0 ; i<count ; i++) {
2560        if (mLayers.valueAt(i) == layer) {
2561            mLayers.removeItemsAt(i, 1);
2562            break;
2563        }
2564    }
2565}
2566sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2567{
2568    Mutex::Autolock _l(mLock);
2569    sp<LayerBaseClient> lbc;
2570    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2571    if (layer != 0) {
2572        lbc = layer.promote();
2573        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2574    }
2575    return lbc;
2576}
2577
2578
2579status_t Client::onTransact(
2580    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2581{
2582    // these must be checked
2583     IPCThreadState* ipc = IPCThreadState::self();
2584     const int pid = ipc->getCallingPid();
2585     const int uid = ipc->getCallingUid();
2586     const int self_pid = getpid();
2587     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2588         // we're called from a different process, do the real check
2589         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2590         {
2591             ALOGE("Permission Denial: "
2592                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2593             return PERMISSION_DENIED;
2594         }
2595     }
2596     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2597}
2598
2599
2600sp<ISurface> Client::createSurface(
2601        ISurfaceComposerClient::surface_data_t* params,
2602        const String8& name,
2603        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2604        uint32_t flags)
2605{
2606    /*
2607     * createSurface must be called from the GL thread so that it can
2608     * have access to the GL context.
2609     */
2610
2611    class MessageCreateSurface : public MessageBase {
2612        sp<ISurface> result;
2613        SurfaceFlinger* flinger;
2614        ISurfaceComposerClient::surface_data_t* params;
2615        Client* client;
2616        const String8& name;
2617        DisplayID display;
2618        uint32_t w, h;
2619        PixelFormat format;
2620        uint32_t flags;
2621    public:
2622        MessageCreateSurface(SurfaceFlinger* flinger,
2623                ISurfaceComposerClient::surface_data_t* params,
2624                const String8& name, Client* client,
2625                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2626                uint32_t flags)
2627            : flinger(flinger), params(params), client(client), name(name),
2628              display(display), w(w), h(h), format(format), flags(flags)
2629        {
2630        }
2631        sp<ISurface> getResult() const { return result; }
2632        virtual bool handler() {
2633            result = flinger->createSurface(params, name, client,
2634                    display, w, h, format, flags);
2635            return true;
2636        }
2637    };
2638
2639    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2640            params, name, this, display, w, h, format, flags);
2641    mFlinger->postMessageSync(msg);
2642    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2643}
2644status_t Client::destroySurface(SurfaceID sid) {
2645    return mFlinger->removeSurface(this, sid);
2646}
2647
2648// ---------------------------------------------------------------------------
2649
2650GraphicBufferAlloc::GraphicBufferAlloc() {}
2651
2652GraphicBufferAlloc::~GraphicBufferAlloc() {}
2653
2654sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2655        PixelFormat format, uint32_t usage, status_t* error) {
2656    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2657    status_t err = graphicBuffer->initCheck();
2658    *error = err;
2659    if (err != 0 || graphicBuffer->handle == 0) {
2660        if (err == NO_MEMORY) {
2661            GraphicBuffer::dumpAllocationsToSystemLog();
2662        }
2663        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2664             "failed (%s), handle=%p",
2665                w, h, strerror(-err), graphicBuffer->handle);
2666        return 0;
2667    }
2668    return graphicBuffer;
2669}
2670
2671// ---------------------------------------------------------------------------
2672
2673GraphicPlane::GraphicPlane()
2674    : mHw(0)
2675{
2676}
2677
2678GraphicPlane::~GraphicPlane() {
2679    delete mHw;
2680}
2681
2682bool GraphicPlane::initialized() const {
2683    return mHw ? true : false;
2684}
2685
2686int GraphicPlane::getWidth() const {
2687    return mWidth;
2688}
2689
2690int GraphicPlane::getHeight() const {
2691    return mHeight;
2692}
2693
2694void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2695{
2696    mHw = hw;
2697
2698    // initialize the display orientation transform.
2699    // it's a constant that should come from the display driver.
2700    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2701    char property[PROPERTY_VALUE_MAX];
2702    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2703        //displayOrientation
2704        switch (atoi(property)) {
2705        case 90:
2706            displayOrientation = ISurfaceComposer::eOrientation90;
2707            break;
2708        case 270:
2709            displayOrientation = ISurfaceComposer::eOrientation270;
2710            break;
2711        }
2712    }
2713
2714    const float w = hw->getWidth();
2715    const float h = hw->getHeight();
2716    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2717            &mDisplayTransform);
2718    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2719        mDisplayWidth = h;
2720        mDisplayHeight = w;
2721    } else {
2722        mDisplayWidth = w;
2723        mDisplayHeight = h;
2724    }
2725
2726    setOrientation(ISurfaceComposer::eOrientationDefault);
2727}
2728
2729status_t GraphicPlane::orientationToTransfrom(
2730        int orientation, int w, int h, Transform* tr)
2731{
2732    uint32_t flags = 0;
2733    switch (orientation) {
2734    case ISurfaceComposer::eOrientationDefault:
2735        flags = Transform::ROT_0;
2736        break;
2737    case ISurfaceComposer::eOrientation90:
2738        flags = Transform::ROT_90;
2739        break;
2740    case ISurfaceComposer::eOrientation180:
2741        flags = Transform::ROT_180;
2742        break;
2743    case ISurfaceComposer::eOrientation270:
2744        flags = Transform::ROT_270;
2745        break;
2746    default:
2747        return BAD_VALUE;
2748    }
2749    tr->set(flags, w, h);
2750    return NO_ERROR;
2751}
2752
2753status_t GraphicPlane::setOrientation(int orientation)
2754{
2755    // If the rotation can be handled in hardware, this is where
2756    // the magic should happen.
2757
2758    const DisplayHardware& hw(displayHardware());
2759    const float w = mDisplayWidth;
2760    const float h = mDisplayHeight;
2761    mWidth = int(w);
2762    mHeight = int(h);
2763
2764    Transform orientationTransform;
2765    GraphicPlane::orientationToTransfrom(orientation, w, h,
2766            &orientationTransform);
2767    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2768        mWidth = int(h);
2769        mHeight = int(w);
2770    }
2771
2772    mOrientation = orientation;
2773    mGlobalTransform = mDisplayTransform * orientationTransform;
2774    return NO_ERROR;
2775}
2776
2777const DisplayHardware& GraphicPlane::displayHardware() const {
2778    return *mHw;
2779}
2780
2781DisplayHardware& GraphicPlane::editDisplayHardware() {
2782    return *mHw;
2783}
2784
2785const Transform& GraphicPlane::transform() const {
2786    return mGlobalTransform;
2787}
2788
2789EGLDisplay GraphicPlane::getEGLDisplay() const {
2790    return mHw->getEGLDisplay();
2791}
2792
2793// ---------------------------------------------------------------------------
2794
2795}; // namespace android
2796