SurfaceFlinger.cpp revision 3854ed549012f2abf8fea7b0e6db30b104ea5547 
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#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <stdint.h>
22#include <unistd.h>
23#include <fcntl.h>
24#include <errno.h>
25#include <math.h>
26#include <limits.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/ioctl.h>
30
31#include <cutils/log.h>
32#include <cutils/properties.h>
33
34#include <binder/IPCThreadState.h>
35#include <binder/IServiceManager.h>
36#include <binder/MemoryHeapBase.h>
37#include <binder/PermissionCache.h>
38
39#include <gui/IDisplayEventConnection.h>
40
41#include <utils/String8.h>
42#include <utils/String16.h>
43#include <utils/StopWatch.h>
44#include <utils/Trace.h>
45
46#include <ui/GraphicBufferAllocator.h>
47#include <ui/PixelFormat.h>
48
49#include <GLES/gl.h>
50
51#include "clz.h"
52#include "DdmConnection.h"
53#include "DisplayEventConnection.h"
54#include "EventThread.h"
55#include "GLExtensions.h"
56#include "Layer.h"
57#include "LayerDim.h"
58#include "LayerScreenshot.h"
59#include "SurfaceFlinger.h"
60
61#include "DisplayHardware/DisplayHardware.h"
62#include "DisplayHardware/HWComposer.h"
63
64#include <private/android_filesystem_config.h>
65#include <private/gui/SharedBufferStack.h>
66
67#define EGL_VERSION_HW_ANDROID  0x3143
68
69#define DISPLAY_COUNT       1
70
71namespace android {
72// ---------------------------------------------------------------------------
73
74const String16 sHardwareTest("android.permission.HARDWARE_TEST");
75const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
76const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
77const String16 sDump("android.permission.DUMP");
78
79// ---------------------------------------------------------------------------
80
81SurfaceFlinger::SurfaceFlinger()
82    :   BnSurfaceComposer(), Thread(false),
83        mTransactionFlags(0),
84        mTransationPending(false),
85        mLayersRemoved(false),
86        mBootTime(systemTime()),
87        mVisibleRegionsDirty(false),
88        mHwWorkListDirty(false),
89        mElectronBeamAnimationMode(0),
90        mDebugRegion(0),
91        mDebugBackground(0),
92        mDebugDDMS(0),
93        mDebugDisableHWC(0),
94        mDebugDisableTransformHint(0),
95        mDebugInSwapBuffers(0),
96        mLastSwapBufferTime(0),
97        mDebugInTransaction(0),
98        mLastTransactionTime(0),
99        mBootFinished(false),
100        mConsoleSignals(0),
101        mSecureFrameBuffer(0)
102{
103    init();
104}
105
106void SurfaceFlinger::init()
107{
108    ALOGI("SurfaceFlinger is starting");
109
110    // debugging stuff...
111    char value[PROPERTY_VALUE_MAX];
112
113    property_get("debug.sf.showupdates", value, "0");
114    mDebugRegion = atoi(value);
115
116    property_get("debug.sf.showbackground", value, "0");
117    mDebugBackground = atoi(value);
118
119#ifdef DDMS_DEBUGGING
120    property_get("debug.sf.ddms", value, "0");
121    mDebugDDMS = atoi(value);
122    if (mDebugDDMS) {
123        DdmConnection::start(getServiceName());
124    }
125#endif
126
127    ALOGI_IF(mDebugRegion,       "showupdates enabled");
128    ALOGI_IF(mDebugBackground,   "showbackground enabled");
129    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
130}
131
132void SurfaceFlinger::onFirstRef()
133{
134    mEventQueue.init(this);
135
136    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
137
138    // Wait for the main thread to be done with its initialization
139    mReadyToRunBarrier.wait();
140}
141
142
143SurfaceFlinger::~SurfaceFlinger()
144{
145    glDeleteTextures(1, &mWormholeTexName);
146}
147
148void SurfaceFlinger::binderDied(const wp<IBinder>& who)
149{
150    // the window manager died on us. prepare its eulogy.
151
152    // reset screen orientation
153    Vector<ComposerState> state;
154    setTransactionState(state, eOrientationDefault, 0);
155
156    // restart the boot-animation
157    property_set("ctl.start", "bootanim");
158}
159
160sp<IMemoryHeap> SurfaceFlinger::getCblk() const
161{
162    return mServerHeap;
163}
164
165sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
166{
167    sp<ISurfaceComposerClient> bclient;
168    sp<Client> client(new Client(this));
169    status_t err = client->initCheck();
170    if (err == NO_ERROR) {
171        bclient = client;
172    }
173    return bclient;
174}
175
176sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
177{
178    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
179    return gba;
180}
181
182const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
183{
184    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
185    const GraphicPlane& plane(mGraphicPlanes[dpy]);
186    return plane;
187}
188
189GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
190{
191    return const_cast<GraphicPlane&>(
192        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
193}
194
195void SurfaceFlinger::bootFinished()
196{
197    const nsecs_t now = systemTime();
198    const nsecs_t duration = now - mBootTime;
199    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
200    mBootFinished = true;
201
202    // wait patiently for the window manager death
203    const String16 name("window");
204    sp<IBinder> window(defaultServiceManager()->getService(name));
205    if (window != 0) {
206        window->linkToDeath(this);
207    }
208
209    // stop boot animation
210    property_set("ctl.stop", "bootanim");
211}
212
213static inline uint16_t pack565(int r, int g, int b) {
214    return (r<<11)|(g<<5)|b;
215}
216
217status_t SurfaceFlinger::readyToRun()
218{
219    ALOGI(   "SurfaceFlinger's main thread ready to run. "
220            "Initializing graphics H/W...");
221
222    // we only support one display currently
223    int dpy = 0;
224
225    {
226        // initialize the main display
227        GraphicPlane& plane(graphicPlane(dpy));
228        DisplayHardware* const hw = new DisplayHardware(this, dpy);
229        plane.setDisplayHardware(hw);
230    }
231
232    // create the shared control-block
233    mServerHeap = new MemoryHeapBase(4096,
234            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
235    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
236
237    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
238    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
239
240    new(mServerCblk) surface_flinger_cblk_t;
241
242    // initialize primary screen
243    // (other display should be initialized in the same manner, but
244    // asynchronously, as they could come and go. None of this is supported
245    // yet).
246    const GraphicPlane& plane(graphicPlane(dpy));
247    const DisplayHardware& hw = plane.displayHardware();
248    const uint32_t w = hw.getWidth();
249    const uint32_t h = hw.getHeight();
250    const uint32_t f = hw.getFormat();
251    hw.makeCurrent();
252
253    // initialize the shared control block
254    mServerCblk->connected |= 1<<dpy;
255    display_cblk_t* dcblk = mServerCblk->displays + dpy;
256    memset(dcblk, 0, sizeof(display_cblk_t));
257    dcblk->w            = plane.getWidth();
258    dcblk->h            = plane.getHeight();
259    dcblk->format       = f;
260    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
261    dcblk->xdpi         = hw.getDpiX();
262    dcblk->ydpi         = hw.getDpiY();
263    dcblk->fps          = hw.getRefreshRate();
264    dcblk->density      = hw.getDensity();
265
266    // Initialize OpenGL|ES
267    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
268    glPixelStorei(GL_PACK_ALIGNMENT, 4);
269    glEnableClientState(GL_VERTEX_ARRAY);
270    glEnable(GL_SCISSOR_TEST);
271    glShadeModel(GL_FLAT);
272    glDisable(GL_DITHER);
273    glDisable(GL_CULL_FACE);
274
275    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
276    const uint16_t g1 = pack565(0x17,0x2f,0x17);
277    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
278    glGenTextures(1, &mWormholeTexName);
279    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
284    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
285            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
286
287    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
288    glGenTextures(1, &mProtectedTexName);
289    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
292    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
293    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
294    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
295            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
296
297    glViewport(0, 0, w, h);
298    glMatrixMode(GL_PROJECTION);
299    glLoadIdentity();
300    // put the origin in the left-bottom corner
301    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
302
303
304    // start the EventThread
305    mEventThread = new EventThread(this);
306    mEventQueue.setEventThread(mEventThread);
307    hw.startSleepManagement();
308
309    /*
310     *  We're now ready to accept clients...
311     */
312
313    mReadyToRunBarrier.open();
314
315    // start boot animation
316    property_set("ctl.start", "bootanim");
317
318    return NO_ERROR;
319}
320
321// ----------------------------------------------------------------------------
322
323bool SurfaceFlinger::authenticateSurfaceTexture(
324        const sp<ISurfaceTexture>& surfaceTexture) const {
325    Mutex::Autolock _l(mStateLock);
326    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
327
328    // Check the visible layer list for the ISurface
329    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
330    size_t count = currentLayers.size();
331    for (size_t i=0 ; i<count ; i++) {
332        const sp<LayerBase>& layer(currentLayers[i]);
333        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
334        if (lbc != NULL) {
335            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
336            if (lbcBinder == surfaceTextureBinder) {
337                return true;
338            }
339        }
340    }
341
342    // Check the layers in the purgatory.  This check is here so that if a
343    // SurfaceTexture gets destroyed before all the clients are done using it,
344    // the error will not be reported as "surface XYZ is not authenticated", but
345    // will instead fail later on when the client tries to use the surface,
346    // which should be reported as "surface XYZ returned an -ENODEV".  The
347    // purgatorized layers are no less authentic than the visible ones, so this
348    // should not cause any harm.
349    size_t purgatorySize =  mLayerPurgatory.size();
350    for (size_t i=0 ; i<purgatorySize ; i++) {
351        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
352        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
353        if (lbc != NULL) {
354            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
355            if (lbcBinder == surfaceTextureBinder) {
356                return true;
357            }
358        }
359    }
360
361    return false;
362}
363
364// ----------------------------------------------------------------------------
365
366sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
367    return mEventThread->createEventConnection();
368}
369
370// ----------------------------------------------------------------------------
371
372void SurfaceFlinger::waitForEvent() {
373    mEventQueue.waitMessage();
374}
375
376void SurfaceFlinger::signalTransaction() {
377    mEventQueue.invalidate();
378}
379
380void SurfaceFlinger::signalLayerUpdate() {
381    mEventQueue.invalidate();
382}
383
384void SurfaceFlinger::signalRefresh() {
385    mEventQueue.refresh();
386}
387
388status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
389        nsecs_t reltime, uint32_t flags) {
390    return mEventQueue.postMessage(msg, reltime);
391}
392
393status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
394        nsecs_t reltime, uint32_t flags) {
395    status_t res = mEventQueue.postMessage(msg, reltime);
396    if (res == NO_ERROR) {
397        msg->wait();
398    }
399    return res;
400}
401
402bool SurfaceFlinger::threadLoop()
403{
404    waitForEvent();
405    return true;
406}
407
408void SurfaceFlinger::onMessageReceived(int32_t what)
409{
410    ATRACE_CALL();
411    switch (what) {
412        case MessageQueue::REFRESH: {
413//        case MessageQueue::INVALIDATE: {
414            // check for transactions
415            if (CC_UNLIKELY(mConsoleSignals)) {
416                handleConsoleEvents();
417            }
418
419            // if we're in a global transaction, don't do anything.
420            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
421            uint32_t transactionFlags = peekTransactionFlags(mask);
422            if (CC_UNLIKELY(transactionFlags)) {
423                handleTransaction(transactionFlags);
424            }
425
426            // post surfaces (if needed)
427            handlePageFlip();
428
429//            signalRefresh();
430//
431//        } break;
432//
433//        case MessageQueue::REFRESH: {
434
435            handleRefresh();
436
437            const DisplayHardware& hw(graphicPlane(0).displayHardware());
438
439//            if (mDirtyRegion.isEmpty()) {
440//                return;
441//            }
442
443            if (CC_UNLIKELY(mHwWorkListDirty)) {
444                // build the h/w work list
445                handleWorkList();
446            }
447
448            if (CC_LIKELY(hw.canDraw())) {
449                // repaint the framebuffer (if needed)
450                handleRepaint();
451                // inform the h/w that we're done compositing
452                hw.compositionComplete();
453                postFramebuffer();
454            } else {
455                // pretend we did the post
456                hw.compositionComplete();
457            }
458
459        } break;
460    }
461}
462
463void SurfaceFlinger::postFramebuffer()
464{
465    ATRACE_CALL();
466    // mSwapRegion can be empty here is some cases, for instance if a hidden
467    // or fully transparent window is updating.
468    // in that case, we need to flip anyways to not risk a deadlock with
469    // h/w composer.
470
471    const DisplayHardware& hw(graphicPlane(0).displayHardware());
472    const nsecs_t now = systemTime();
473    mDebugInSwapBuffers = now;
474    hw.flip(mSwapRegion);
475
476    size_t numLayers = mVisibleLayersSortedByZ.size();
477    for (size_t i = 0; i < numLayers; i++) {
478        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
479    }
480
481    mLastSwapBufferTime = systemTime() - now;
482    mDebugInSwapBuffers = 0;
483    mSwapRegion.clear();
484}
485
486void SurfaceFlinger::handleConsoleEvents()
487{
488    // something to do with the console
489    const DisplayHardware& hw = graphicPlane(0).displayHardware();
490
491    int what = android_atomic_and(0, &mConsoleSignals);
492    if (what & eConsoleAcquired) {
493        hw.acquireScreen();
494        // this is a temporary work-around, eventually this should be called
495        // by the power-manager
496        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
497    }
498
499    if (what & eConsoleReleased) {
500        if (hw.isScreenAcquired()) {
501            hw.releaseScreen();
502        }
503    }
504
505    mDirtyRegion.set(hw.bounds());
506}
507
508void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
509{
510    ATRACE_CALL();
511
512    Mutex::Autolock _l(mStateLock);
513    const nsecs_t now = systemTime();
514    mDebugInTransaction = now;
515
516    // Here we're guaranteed that some transaction flags are set
517    // so we can call handleTransactionLocked() unconditionally.
518    // We call getTransactionFlags(), which will also clear the flags,
519    // with mStateLock held to guarantee that mCurrentState won't change
520    // until the transaction is committed.
521
522    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
523    transactionFlags = getTransactionFlags(mask);
524    handleTransactionLocked(transactionFlags);
525
526    mLastTransactionTime = systemTime() - now;
527    mDebugInTransaction = 0;
528    invalidateHwcGeometry();
529    // here the transaction has been committed
530}
531
532void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
533{
534    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
535    const size_t count = currentLayers.size();
536
537    /*
538     * Traversal of the children
539     * (perform the transaction for each of them if needed)
540     */
541
542    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
543    if (layersNeedTransaction) {
544        for (size_t i=0 ; i<count ; i++) {
545            const sp<LayerBase>& layer = currentLayers[i];
546            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
547            if (!trFlags) continue;
548
549            const uint32_t flags = layer->doTransaction(0);
550            if (flags & Layer::eVisibleRegion)
551                mVisibleRegionsDirty = true;
552        }
553    }
554
555    /*
556     * Perform our own transaction if needed
557     */
558
559    if (transactionFlags & eTransactionNeeded) {
560        if (mCurrentState.orientation != mDrawingState.orientation) {
561            // the orientation has changed, recompute all visible regions
562            // and invalidate everything.
563
564            const int dpy = 0;
565            const int orientation = mCurrentState.orientation;
566            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
567            GraphicPlane& plane(graphicPlane(dpy));
568            plane.setOrientation(orientation);
569
570            // update the shared control block
571            const DisplayHardware& hw(plane.displayHardware());
572            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
573            dcblk->orientation = orientation;
574            dcblk->w = plane.getWidth();
575            dcblk->h = plane.getHeight();
576
577            mVisibleRegionsDirty = true;
578            mDirtyRegion.set(hw.bounds());
579        }
580
581        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
582            // layers have been added
583            mVisibleRegionsDirty = true;
584        }
585
586        // some layers might have been removed, so
587        // we need to update the regions they're exposing.
588        if (mLayersRemoved) {
589            mLayersRemoved = false;
590            mVisibleRegionsDirty = true;
591            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
592            const size_t count = previousLayers.size();
593            for (size_t i=0 ; i<count ; i++) {
594                const sp<LayerBase>& layer(previousLayers[i]);
595                if (currentLayers.indexOf( layer ) < 0) {
596                    // this layer is not visible anymore
597                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
598                }
599            }
600        }
601    }
602
603    commitTransaction();
604}
605
606void SurfaceFlinger::computeVisibleRegions(
607    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
608{
609    ATRACE_CALL();
610
611    const GraphicPlane& plane(graphicPlane(0));
612    const Transform& planeTransform(plane.transform());
613    const DisplayHardware& hw(plane.displayHardware());
614    const Region screenRegion(hw.bounds());
615
616    Region aboveOpaqueLayers;
617    Region aboveCoveredLayers;
618    Region dirty;
619
620    bool secureFrameBuffer = false;
621
622    size_t i = currentLayers.size();
623    while (i--) {
624        const sp<LayerBase>& layer = currentLayers[i];
625        layer->validateVisibility(planeTransform);
626
627        // start with the whole surface at its current location
628        const Layer::State& s(layer->drawingState());
629
630        /*
631         * opaqueRegion: area of a surface that is fully opaque.
632         */
633        Region opaqueRegion;
634
635        /*
636         * visibleRegion: area of a surface that is visible on screen
637         * and not fully transparent. This is essentially the layer's
638         * footprint minus the opaque regions above it.
639         * Areas covered by a translucent surface are considered visible.
640         */
641        Region visibleRegion;
642
643        /*
644         * coveredRegion: area of a surface that is covered by all
645         * visible regions above it (which includes the translucent areas).
646         */
647        Region coveredRegion;
648
649
650        // handle hidden surfaces by setting the visible region to empty
651        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
652            const bool translucent = !layer->isOpaque();
653            const Rect bounds(layer->visibleBounds());
654            visibleRegion.set(bounds);
655            visibleRegion.andSelf(screenRegion);
656            if (!visibleRegion.isEmpty()) {
657                // Remove the transparent area from the visible region
658                if (translucent) {
659                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
660                }
661
662                // compute the opaque region
663                const int32_t layerOrientation = layer->getOrientation();
664                if (s.alpha==255 && !translucent &&
665                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
666                    // the opaque region is the layer's footprint
667                    opaqueRegion = visibleRegion;
668                }
669            }
670        }
671
672        // Clip the covered region to the visible region
673        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
674
675        // Update aboveCoveredLayers for next (lower) layer
676        aboveCoveredLayers.orSelf(visibleRegion);
677
678        // subtract the opaque region covered by the layers above us
679        visibleRegion.subtractSelf(aboveOpaqueLayers);
680
681        // compute this layer's dirty region
682        if (layer->contentDirty) {
683            // we need to invalidate the whole region
684            dirty = visibleRegion;
685            // as well, as the old visible region
686            dirty.orSelf(layer->visibleRegionScreen);
687            layer->contentDirty = false;
688        } else {
689            /* compute the exposed region:
690             *   the exposed region consists of two components:
691             *   1) what's VISIBLE now and was COVERED before
692             *   2) what's EXPOSED now less what was EXPOSED before
693             *
694             * note that (1) is conservative, we start with the whole
695             * visible region but only keep what used to be covered by
696             * something -- which mean it may have been exposed.
697             *
698             * (2) handles areas that were not covered by anything but got
699             * exposed because of a resize.
700             */
701            const Region newExposed = visibleRegion - coveredRegion;
702            const Region oldVisibleRegion = layer->visibleRegionScreen;
703            const Region oldCoveredRegion = layer->coveredRegionScreen;
704            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
705            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
706        }
707        dirty.subtractSelf(aboveOpaqueLayers);
708
709        // accumulate to the screen dirty region
710        dirtyRegion.orSelf(dirty);
711
712        // Update aboveOpaqueLayers for next (lower) layer
713        aboveOpaqueLayers.orSelf(opaqueRegion);
714
715        // Store the visible region is screen space
716        layer->setVisibleRegion(visibleRegion);
717        layer->setCoveredRegion(coveredRegion);
718
719        // If a secure layer is partially visible, lock-down the screen!
720        if (layer->isSecure() && !visibleRegion.isEmpty()) {
721            secureFrameBuffer = true;
722        }
723    }
724
725    // invalidate the areas where a layer was removed
726    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
727    mDirtyRegionRemovedLayer.clear();
728
729    mSecureFrameBuffer = secureFrameBuffer;
730    opaqueRegion = aboveOpaqueLayers;
731}
732
733
734void SurfaceFlinger::commitTransaction()
735{
736    if (!mLayersPendingRemoval.isEmpty()) {
737        // Notify removed layers now that they can't be drawn from
738        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
739            mLayersPendingRemoval[i]->onRemoved();
740        }
741        mLayersPendingRemoval.clear();
742    }
743
744    mDrawingState = mCurrentState;
745    mTransationPending = false;
746    mTransactionCV.broadcast();
747}
748
749void SurfaceFlinger::handlePageFlip()
750{
751    ATRACE_CALL();
752    const DisplayHardware& hw = graphicPlane(0).displayHardware();
753    const Region screenRegion(hw.bounds());
754
755    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
756    const bool visibleRegions = lockPageFlip(currentLayers);
757
758        if (visibleRegions || mVisibleRegionsDirty) {
759            Region opaqueRegion;
760            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
761
762            /*
763             *  rebuild the visible layer list
764             */
765            const size_t count = currentLayers.size();
766            mVisibleLayersSortedByZ.clear();
767            mVisibleLayersSortedByZ.setCapacity(count);
768            for (size_t i=0 ; i<count ; i++) {
769                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
770                    mVisibleLayersSortedByZ.add(currentLayers[i]);
771            }
772
773            mWormholeRegion = screenRegion.subtract(opaqueRegion);
774            mVisibleRegionsDirty = false;
775            invalidateHwcGeometry();
776        }
777
778    unlockPageFlip(currentLayers);
779
780    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
781    mDirtyRegion.andSelf(screenRegion);
782}
783
784void SurfaceFlinger::invalidateHwcGeometry()
785{
786    mHwWorkListDirty = true;
787}
788
789bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
790{
791    bool recomputeVisibleRegions = false;
792    size_t count = currentLayers.size();
793    sp<LayerBase> const* layers = currentLayers.array();
794    for (size_t i=0 ; i<count ; i++) {
795        const sp<LayerBase>& layer(layers[i]);
796        layer->lockPageFlip(recomputeVisibleRegions);
797    }
798    return recomputeVisibleRegions;
799}
800
801void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
802{
803    const GraphicPlane& plane(graphicPlane(0));
804    const Transform& planeTransform(plane.transform());
805    const size_t count = currentLayers.size();
806    sp<LayerBase> const* layers = currentLayers.array();
807    for (size_t i=0 ; i<count ; i++) {
808        const sp<LayerBase>& layer(layers[i]);
809        layer->unlockPageFlip(planeTransform, mDirtyRegion);
810    }
811}
812
813void SurfaceFlinger::handleRefresh()
814{
815    bool needInvalidate = false;
816    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
817    const size_t count = currentLayers.size();
818    for (size_t i=0 ; i<count ; i++) {
819        const sp<LayerBase>& layer(currentLayers[i]);
820        if (layer->onPreComposition()) {
821            needInvalidate = true;
822        }
823    }
824    if (needInvalidate) {
825        signalLayerUpdate();
826    }
827}
828
829
830void SurfaceFlinger::handleWorkList()
831{
832    mHwWorkListDirty = false;
833    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
834    if (hwc.initCheck() == NO_ERROR) {
835        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
836        const size_t count = currentLayers.size();
837        hwc.createWorkList(count);
838        hwc_layer_t* const cur(hwc.getLayers());
839        for (size_t i=0 ; cur && i<count ; i++) {
840            currentLayers[i]->setGeometry(&cur[i]);
841            if (mDebugDisableHWC || mDebugRegion) {
842                cur[i].compositionType = HWC_FRAMEBUFFER;
843                cur[i].flags |= HWC_SKIP_LAYER;
844            }
845        }
846    }
847}
848
849void SurfaceFlinger::handleRepaint()
850{
851    ATRACE_CALL();
852
853    // compute the invalid region
854    mSwapRegion.orSelf(mDirtyRegion);
855
856    if (CC_UNLIKELY(mDebugRegion)) {
857        debugFlashRegions();
858    }
859
860    // set the frame buffer
861    const DisplayHardware& hw(graphicPlane(0).displayHardware());
862    glMatrixMode(GL_MODELVIEW);
863    glLoadIdentity();
864
865    uint32_t flags = hw.getFlags();
866    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
867        (flags & DisplayHardware::BUFFER_PRESERVED))
868    {
869        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
870        // takes a rectangle, we must make sure to update that whole
871        // rectangle in that case
872        if (flags & DisplayHardware::SWAP_RECTANGLE) {
873            // TODO: we really should be able to pass a region to
874            // SWAP_RECTANGLE so that we don't have to redraw all this.
875            mDirtyRegion.set(mSwapRegion.bounds());
876        } else {
877            // in the BUFFER_PRESERVED case, obviously, we can update only
878            // what's needed and nothing more.
879            // NOTE: this is NOT a common case, as preserving the backbuffer
880            // is costly and usually involves copying the whole update back.
881        }
882    } else {
883        if (flags & DisplayHardware::PARTIAL_UPDATES) {
884            // We need to redraw the rectangle that will be updated
885            // (pushed to the framebuffer).
886            // This is needed because PARTIAL_UPDATES only takes one
887            // rectangle instead of a region (see DisplayHardware::flip())
888            mDirtyRegion.set(mSwapRegion.bounds());
889        } else {
890            // we need to redraw everything (the whole screen)
891            mDirtyRegion.set(hw.bounds());
892            mSwapRegion = mDirtyRegion;
893        }
894    }
895
896    setupHardwareComposer(mDirtyRegion);
897    composeSurfaces(mDirtyRegion);
898
899    // update the swap region and clear the dirty region
900    mSwapRegion.orSelf(mDirtyRegion);
901    mDirtyRegion.clear();
902}
903
904void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
905{
906    const DisplayHardware& hw(graphicPlane(0).displayHardware());
907    HWComposer& hwc(hw.getHwComposer());
908    hwc_layer_t* const cur(hwc.getLayers());
909    if (!cur) {
910        return;
911    }
912
913    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
914    size_t count = layers.size();
915
916    ALOGE_IF(hwc.getNumLayers() != count,
917            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
918            hwc.getNumLayers(), count);
919
920    // just to be extra-safe, use the smallest count
921    if (hwc.initCheck() == NO_ERROR) {
922        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
923    }
924
925    /*
926     *  update the per-frame h/w composer data for each layer
927     *  and build the transparent region of the FB
928     */
929    for (size_t i=0 ; i<count ; i++) {
930        const sp<LayerBase>& layer(layers[i]);
931        layer->setPerFrameData(&cur[i]);
932    }
933    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
934    status_t err = hwc.prepare();
935    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
936
937    if (err == NO_ERROR) {
938        // what's happening here is tricky.
939        // we want to clear all the layers with the CLEAR_FB flags
940        // that are opaque.
941        // however, since some GPU are efficient at preserving
942        // the backbuffer, we want to take advantage of that so we do the
943        // clear only in the dirty region (other areas will be preserved
944        // on those GPUs).
945        //   NOTE: on non backbuffer preserving GPU, the dirty region
946        //   has already been expanded as needed, so the code is correct
947        //   there too.
948        //
949        // However, the content of the framebuffer cannot be trusted when
950        // we switch to/from FB/OVERLAY, in which case we need to
951        // expand the dirty region to those areas too.
952        //
953        // Note also that there is a special case when switching from
954        // "no layers in FB" to "some layers in FB", where we need to redraw
955        // the entire FB, since some areas might contain uninitialized
956        // data.
957        //
958        // Also we want to make sure to not clear areas that belong to
959        // layers above that won't redraw (we would just be erasing them),
960        // that is, we can't erase anything outside the dirty region.
961
962        Region transparent;
963
964        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
965            transparent.set(hw.getBounds());
966            dirtyInOut = transparent;
967        } else {
968            for (size_t i=0 ; i<count ; i++) {
969                const sp<LayerBase>& layer(layers[i]);
970                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
971                    transparent.orSelf(layer->visibleRegionScreen);
972                }
973                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
974                if (isOverlay != layer->isOverlay()) {
975                    // we transitioned to/from overlay, so add this layer
976                    // to the dirty region so the framebuffer can be either
977                    // cleared or redrawn.
978                    dirtyInOut.orSelf(layer->visibleRegionScreen);
979                }
980                layer->setOverlay(isOverlay);
981            }
982            // don't erase stuff outside the dirty region
983            transparent.andSelf(dirtyInOut);
984        }
985
986        /*
987         *  clear the area of the FB that need to be transparent
988         */
989        if (!transparent.isEmpty()) {
990            glClearColor(0,0,0,0);
991            Region::const_iterator it = transparent.begin();
992            Region::const_iterator const end = transparent.end();
993            const int32_t height = hw.getHeight();
994            while (it != end) {
995                const Rect& r(*it++);
996                const GLint sy = height - (r.top + r.height());
997                glScissor(r.left, sy, r.width(), r.height());
998                glClear(GL_COLOR_BUFFER_BIT);
999            }
1000        }
1001    }
1002}
1003
1004void SurfaceFlinger::composeSurfaces(const Region& dirty)
1005{
1006    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1007    HWComposer& hwc(hw.getHwComposer());
1008
1009    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
1010    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
1011        // should never happen unless the window manager has a bug
1012        // draw something...
1013        drawWormhole();
1014    }
1015
1016    // FIXME: workaroud for b/6020860
1017    glEnable(GL_SCISSOR_TEST);
1018    glScissor(0,0,0,0);
1019    glClear(GL_COLOR_BUFFER_BIT);
1020    // end-workaround
1021
1022    /*
1023     * and then, render the layers targeted at the framebuffer
1024     */
1025    hwc_layer_t* const cur(hwc.getLayers());
1026    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1027    size_t count = layers.size();
1028    for (size_t i=0 ; i<count ; i++) {
1029        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1030            continue;
1031        }
1032        const sp<LayerBase>& layer(layers[i]);
1033        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1034        if (!clip.isEmpty()) {
1035            layer->draw(clip);
1036        }
1037    }
1038}
1039
1040void SurfaceFlinger::debugFlashRegions()
1041{
1042    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1043    const uint32_t flags = hw.getFlags();
1044    const int32_t height = hw.getHeight();
1045    if (mSwapRegion.isEmpty()) {
1046        return;
1047    }
1048
1049    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1050            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1051        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1052                mDirtyRegion.bounds() : hw.bounds());
1053        composeSurfaces(repaint);
1054    }
1055
1056    glDisable(GL_TEXTURE_EXTERNAL_OES);
1057    glDisable(GL_TEXTURE_2D);
1058    glDisable(GL_BLEND);
1059    glDisable(GL_SCISSOR_TEST);
1060
1061    static int toggle = 0;
1062    toggle = 1 - toggle;
1063    if (toggle) {
1064        glColor4f(1, 0, 1, 1);
1065    } else {
1066        glColor4f(1, 1, 0, 1);
1067    }
1068
1069    Region::const_iterator it = mDirtyRegion.begin();
1070    Region::const_iterator const end = mDirtyRegion.end();
1071    while (it != end) {
1072        const Rect& r = *it++;
1073        GLfloat vertices[][2] = {
1074                { r.left,  height - r.top },
1075                { r.left,  height - r.bottom },
1076                { r.right, height - r.bottom },
1077                { r.right, height - r.top }
1078        };
1079        glVertexPointer(2, GL_FLOAT, 0, vertices);
1080        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1081    }
1082
1083    hw.flip(mSwapRegion);
1084
1085    if (mDebugRegion > 1)
1086        usleep(mDebugRegion * 1000);
1087
1088    glEnable(GL_SCISSOR_TEST);
1089}
1090
1091void SurfaceFlinger::drawWormhole() const
1092{
1093    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1094    if (region.isEmpty())
1095        return;
1096
1097    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1098    const int32_t width = hw.getWidth();
1099    const int32_t height = hw.getHeight();
1100
1101    if (CC_LIKELY(!mDebugBackground)) {
1102        glClearColor(0,0,0,0);
1103        Region::const_iterator it = region.begin();
1104        Region::const_iterator const end = region.end();
1105        while (it != end) {
1106            const Rect& r = *it++;
1107            const GLint sy = height - (r.top + r.height());
1108            glScissor(r.left, sy, r.width(), r.height());
1109            glClear(GL_COLOR_BUFFER_BIT);
1110        }
1111    } else {
1112        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1113                { width, height }, { 0, height }  };
1114        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1115
1116        glVertexPointer(2, GL_SHORT, 0, vertices);
1117        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1118        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1119
1120        glDisable(GL_TEXTURE_EXTERNAL_OES);
1121        glEnable(GL_TEXTURE_2D);
1122        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1123        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1124        glMatrixMode(GL_TEXTURE);
1125        glLoadIdentity();
1126
1127        glDisable(GL_BLEND);
1128
1129        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1130        Region::const_iterator it = region.begin();
1131        Region::const_iterator const end = region.end();
1132        while (it != end) {
1133            const Rect& r = *it++;
1134            const GLint sy = height - (r.top + r.height());
1135            glScissor(r.left, sy, r.width(), r.height());
1136            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1137        }
1138        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1139        glDisable(GL_TEXTURE_2D);
1140        glLoadIdentity();
1141        glMatrixMode(GL_MODELVIEW);
1142    }
1143}
1144
1145status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1146{
1147    Mutex::Autolock _l(mStateLock);
1148    addLayer_l(layer);
1149    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1150    return NO_ERROR;
1151}
1152
1153status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1154{
1155    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1156    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1157}
1158
1159ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1160        const sp<LayerBaseClient>& lbc)
1161{
1162    // attach this layer to the client
1163    size_t name = client->attachLayer(lbc);
1164
1165    Mutex::Autolock _l(mStateLock);
1166
1167    // add this layer to the current state list
1168    addLayer_l(lbc);
1169
1170    return ssize_t(name);
1171}
1172
1173status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1174{
1175    Mutex::Autolock _l(mStateLock);
1176    status_t err = purgatorizeLayer_l(layer);
1177    if (err == NO_ERROR)
1178        setTransactionFlags(eTransactionNeeded);
1179    return err;
1180}
1181
1182status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1183{
1184    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1185    if (lbc != 0) {
1186        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1187    }
1188    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1189    if (index >= 0) {
1190        mLayersRemoved = true;
1191        return NO_ERROR;
1192    }
1193    return status_t(index);
1194}
1195
1196status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1197{
1198    // First add the layer to the purgatory list, which makes sure it won't
1199    // go away, then remove it from the main list (through a transaction).
1200    ssize_t err = removeLayer_l(layerBase);
1201    if (err >= 0) {
1202        mLayerPurgatory.add(layerBase);
1203    }
1204
1205    mLayersPendingRemoval.push(layerBase);
1206
1207    // it's possible that we don't find a layer, because it might
1208    // have been destroyed already -- this is not technically an error
1209    // from the user because there is a race between Client::destroySurface(),
1210    // ~Client() and ~ISurface().
1211    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1212}
1213
1214status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1215{
1216    layer->forceVisibilityTransaction();
1217    setTransactionFlags(eTraversalNeeded);
1218    return NO_ERROR;
1219}
1220
1221uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1222{
1223    return android_atomic_release_load(&mTransactionFlags);
1224}
1225
1226uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1227{
1228    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1229}
1230
1231uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1232{
1233    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1234    if ((old & flags)==0) { // wake the server up
1235        signalTransaction();
1236    }
1237    return old;
1238}
1239
1240
1241void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1242        int orientation, uint32_t flags) {
1243    Mutex::Autolock _l(mStateLock);
1244
1245    uint32_t transactionFlags = 0;
1246    if (mCurrentState.orientation != orientation) {
1247        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1248            mCurrentState.orientation = orientation;
1249            transactionFlags |= eTransactionNeeded;
1250        } else if (orientation != eOrientationUnchanged) {
1251            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1252                    orientation);
1253        }
1254    }
1255
1256    const size_t count = state.size();
1257    for (size_t i=0 ; i<count ; i++) {
1258        const ComposerState& s(state[i]);
1259        sp<Client> client( static_cast<Client *>(s.client.get()) );
1260        transactionFlags |= setClientStateLocked(client, s.state);
1261    }
1262
1263    if (transactionFlags) {
1264        // this triggers the transaction
1265        setTransactionFlags(transactionFlags);
1266
1267        // if this is a synchronous transaction, wait for it to take effect
1268        // before returning.
1269        if (flags & eSynchronous) {
1270            mTransationPending = true;
1271        }
1272        while (mTransationPending) {
1273            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1274            if (CC_UNLIKELY(err != NO_ERROR)) {
1275                // just in case something goes wrong in SF, return to the
1276                // called after a few seconds.
1277                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1278                mTransationPending = false;
1279                break;
1280            }
1281        }
1282    }
1283}
1284
1285sp<ISurface> SurfaceFlinger::createSurface(
1286        ISurfaceComposerClient::surface_data_t* params,
1287        const String8& name,
1288        const sp<Client>& client,
1289        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1290        uint32_t flags)
1291{
1292    sp<LayerBaseClient> layer;
1293    sp<ISurface> surfaceHandle;
1294
1295    if (int32_t(w|h) < 0) {
1296        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1297                int(w), int(h));
1298        return surfaceHandle;
1299    }
1300
1301    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1302    sp<Layer> normalLayer;
1303    switch (flags & eFXSurfaceMask) {
1304        case eFXSurfaceNormal:
1305            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1306            layer = normalLayer;
1307            break;
1308        case eFXSurfaceBlur:
1309            // for now we treat Blur as Dim, until we can implement it
1310            // efficiently.
1311        case eFXSurfaceDim:
1312            layer = createDimSurface(client, d, w, h, flags);
1313            break;
1314        case eFXSurfaceScreenshot:
1315            layer = createScreenshotSurface(client, d, w, h, flags);
1316            break;
1317    }
1318
1319    if (layer != 0) {
1320        layer->initStates(w, h, flags);
1321        layer->setName(name);
1322        ssize_t token = addClientLayer(client, layer);
1323
1324        surfaceHandle = layer->getSurface();
1325        if (surfaceHandle != 0) {
1326            params->token = token;
1327            params->identity = layer->getIdentity();
1328            if (normalLayer != 0) {
1329                Mutex::Autolock _l(mStateLock);
1330                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1331            }
1332        }
1333
1334        setTransactionFlags(eTransactionNeeded);
1335    }
1336
1337    return surfaceHandle;
1338}
1339
1340sp<Layer> SurfaceFlinger::createNormalSurface(
1341        const sp<Client>& client, DisplayID display,
1342        uint32_t w, uint32_t h, uint32_t flags,
1343        PixelFormat& format)
1344{
1345    // initialize the surfaces
1346    switch (format) { // TODO: take h/w into account
1347    case PIXEL_FORMAT_TRANSPARENT:
1348    case PIXEL_FORMAT_TRANSLUCENT:
1349        format = PIXEL_FORMAT_RGBA_8888;
1350        break;
1351    case PIXEL_FORMAT_OPAQUE:
1352#ifdef NO_RGBX_8888
1353        format = PIXEL_FORMAT_RGB_565;
1354#else
1355        format = PIXEL_FORMAT_RGBX_8888;
1356#endif
1357        break;
1358    }
1359
1360#ifdef NO_RGBX_8888
1361    if (format == PIXEL_FORMAT_RGBX_8888)
1362        format = PIXEL_FORMAT_RGBA_8888;
1363#endif
1364
1365    sp<Layer> layer = new Layer(this, display, client);
1366    status_t err = layer->setBuffers(w, h, format, flags);
1367    if (CC_LIKELY(err != NO_ERROR)) {
1368        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1369        layer.clear();
1370    }
1371    return layer;
1372}
1373
1374sp<LayerDim> SurfaceFlinger::createDimSurface(
1375        const sp<Client>& client, DisplayID display,
1376        uint32_t w, uint32_t h, uint32_t flags)
1377{
1378    sp<LayerDim> layer = new LayerDim(this, display, client);
1379    return layer;
1380}
1381
1382sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1383        const sp<Client>& client, DisplayID display,
1384        uint32_t w, uint32_t h, uint32_t flags)
1385{
1386    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1387    return layer;
1388}
1389
1390status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1391{
1392    /*
1393     * called by the window manager, when a surface should be marked for
1394     * destruction.
1395     *
1396     * The surface is removed from the current and drawing lists, but placed
1397     * in the purgatory queue, so it's not destroyed right-away (we need
1398     * to wait for all client's references to go away first).
1399     */
1400
1401    status_t err = NAME_NOT_FOUND;
1402    Mutex::Autolock _l(mStateLock);
1403    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1404
1405    if (layer != 0) {
1406        err = purgatorizeLayer_l(layer);
1407        if (err == NO_ERROR) {
1408            setTransactionFlags(eTransactionNeeded);
1409        }
1410    }
1411    return err;
1412}
1413
1414status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1415{
1416    // called by ~ISurface() when all references are gone
1417    status_t err = NO_ERROR;
1418    sp<LayerBaseClient> l(layer.promote());
1419    if (l != NULL) {
1420        Mutex::Autolock _l(mStateLock);
1421        err = removeLayer_l(l);
1422        if (err == NAME_NOT_FOUND) {
1423            // The surface wasn't in the current list, which means it was
1424            // removed already, which means it is in the purgatory,
1425            // and need to be removed from there.
1426            ssize_t idx = mLayerPurgatory.remove(l);
1427            ALOGE_IF(idx < 0,
1428                    "layer=%p is not in the purgatory list", l.get());
1429        }
1430        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1431                "error removing layer=%p (%s)", l.get(), strerror(-err));
1432    }
1433    return err;
1434}
1435
1436uint32_t SurfaceFlinger::setClientStateLocked(
1437        const sp<Client>& client,
1438        const layer_state_t& s)
1439{
1440    uint32_t flags = 0;
1441    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1442    if (layer != 0) {
1443        const uint32_t what = s.what;
1444        if (what & ePositionChanged) {
1445            if (layer->setPosition(s.x, s.y))
1446                flags |= eTraversalNeeded;
1447        }
1448        if (what & eLayerChanged) {
1449            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1450            if (layer->setLayer(s.z)) {
1451                mCurrentState.layersSortedByZ.removeAt(idx);
1452                mCurrentState.layersSortedByZ.add(layer);
1453                // we need traversal (state changed)
1454                // AND transaction (list changed)
1455                flags |= eTransactionNeeded|eTraversalNeeded;
1456            }
1457        }
1458        if (what & eSizeChanged) {
1459            if (layer->setSize(s.w, s.h)) {
1460                flags |= eTraversalNeeded;
1461            }
1462        }
1463        if (what & eAlphaChanged) {
1464            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1465                flags |= eTraversalNeeded;
1466        }
1467        if (what & eMatrixChanged) {
1468            if (layer->setMatrix(s.matrix))
1469                flags |= eTraversalNeeded;
1470        }
1471        if (what & eTransparentRegionChanged) {
1472            if (layer->setTransparentRegionHint(s.transparentRegion))
1473                flags |= eTraversalNeeded;
1474        }
1475        if (what & eVisibilityChanged) {
1476            if (layer->setFlags(s.flags, s.mask))
1477                flags |= eTraversalNeeded;
1478        }
1479    }
1480    return flags;
1481}
1482
1483void SurfaceFlinger::screenReleased(int dpy)
1484{
1485    // this may be called by a signal handler, we can't do too much in here
1486    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1487    signalTransaction();
1488}
1489
1490void SurfaceFlinger::screenAcquired(int dpy)
1491{
1492    // this may be called by a signal handler, we can't do too much in here
1493    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1494    signalTransaction();
1495}
1496
1497status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1498{
1499    const size_t SIZE = 4096;
1500    char buffer[SIZE];
1501    String8 result;
1502
1503    if (!PermissionCache::checkCallingPermission(sDump)) {
1504        snprintf(buffer, SIZE, "Permission Denial: "
1505                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1506                IPCThreadState::self()->getCallingPid(),
1507                IPCThreadState::self()->getCallingUid());
1508        result.append(buffer);
1509    } else {
1510        // Try to get the main lock, but don't insist if we can't
1511        // (this would indicate SF is stuck, but we want to be able to
1512        // print something in dumpsys).
1513        int retry = 3;
1514        while (mStateLock.tryLock()<0 && --retry>=0) {
1515            usleep(1000000);
1516        }
1517        const bool locked(retry >= 0);
1518        if (!locked) {
1519            snprintf(buffer, SIZE,
1520                    "SurfaceFlinger appears to be unresponsive, "
1521                    "dumping anyways (no locks held)\n");
1522            result.append(buffer);
1523        }
1524
1525        bool dumpAll = true;
1526        size_t index = 0;
1527        size_t numArgs = args.size();
1528        if (numArgs) {
1529            if ((index < numArgs) &&
1530                    (args[index] == String16("--list"))) {
1531                index++;
1532                listLayersLocked(args, index, result, buffer, SIZE);
1533                dumpAll = false;
1534            }
1535
1536            if ((index < numArgs) &&
1537                    (args[index] == String16("--latency"))) {
1538                index++;
1539                dumpStatsLocked(args, index, result, buffer, SIZE);
1540                dumpAll = false;
1541            }
1542
1543            if ((index < numArgs) &&
1544                    (args[index] == String16("--latency-clear"))) {
1545                index++;
1546                clearStatsLocked(args, index, result, buffer, SIZE);
1547                dumpAll = false;
1548            }
1549        }
1550
1551        if (dumpAll) {
1552            dumpAllLocked(result, buffer, SIZE);
1553        }
1554
1555        if (locked) {
1556            mStateLock.unlock();
1557        }
1558    }
1559    write(fd, result.string(), result.size());
1560    return NO_ERROR;
1561}
1562
1563void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1564        String8& result, char* buffer, size_t SIZE) const
1565{
1566    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1567    const size_t count = currentLayers.size();
1568    for (size_t i=0 ; i<count ; i++) {
1569        const sp<LayerBase>& layer(currentLayers[i]);
1570        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1571        result.append(buffer);
1572    }
1573}
1574
1575void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1576        String8& result, char* buffer, size_t SIZE) const
1577{
1578    String8 name;
1579    if (index < args.size()) {
1580        name = String8(args[index]);
1581        index++;
1582    }
1583
1584    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1585    const size_t count = currentLayers.size();
1586    for (size_t i=0 ; i<count ; i++) {
1587        const sp<LayerBase>& layer(currentLayers[i]);
1588        if (name.isEmpty()) {
1589            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1590            result.append(buffer);
1591        }
1592        if (name.isEmpty() || (name == layer->getName())) {
1593            layer->dumpStats(result, buffer, SIZE);
1594        }
1595    }
1596}
1597
1598void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1599        String8& result, char* buffer, size_t SIZE) const
1600{
1601    String8 name;
1602    if (index < args.size()) {
1603        name = String8(args[index]);
1604        index++;
1605    }
1606
1607    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1608    const size_t count = currentLayers.size();
1609    for (size_t i=0 ; i<count ; i++) {
1610        const sp<LayerBase>& layer(currentLayers[i]);
1611        if (name.isEmpty() || (name == layer->getName())) {
1612            layer->clearStats();
1613        }
1614    }
1615}
1616
1617void SurfaceFlinger::dumpAllLocked(
1618        String8& result, char* buffer, size_t SIZE) const
1619{
1620    // figure out if we're stuck somewhere
1621    const nsecs_t now = systemTime();
1622    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1623    const nsecs_t inTransaction(mDebugInTransaction);
1624    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1625    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1626
1627    /*
1628     * Dump the visible layer list
1629     */
1630    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1631    const size_t count = currentLayers.size();
1632    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1633    result.append(buffer);
1634    for (size_t i=0 ; i<count ; i++) {
1635        const sp<LayerBase>& layer(currentLayers[i]);
1636        layer->dump(result, buffer, SIZE);
1637    }
1638
1639    /*
1640     * Dump the layers in the purgatory
1641     */
1642
1643    const size_t purgatorySize = mLayerPurgatory.size();
1644    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1645    result.append(buffer);
1646    for (size_t i=0 ; i<purgatorySize ; i++) {
1647        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1648        layer->shortDump(result, buffer, SIZE);
1649    }
1650
1651    /*
1652     * Dump SurfaceFlinger global state
1653     */
1654
1655    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1656    result.append(buffer);
1657
1658    const GLExtensions& extensions(GLExtensions::getInstance());
1659    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1660            extensions.getVendor(),
1661            extensions.getRenderer(),
1662            extensions.getVersion());
1663    result.append(buffer);
1664
1665    snprintf(buffer, SIZE, "EGL : %s\n",
1666            eglQueryString(graphicPlane(0).getEGLDisplay(),
1667                    EGL_VERSION_HW_ANDROID));
1668    result.append(buffer);
1669
1670    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1671    result.append(buffer);
1672
1673    mWormholeRegion.dump(result, "WormholeRegion");
1674    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1675    snprintf(buffer, SIZE,
1676            "  orientation=%d, canDraw=%d\n",
1677            mCurrentState.orientation, hw.canDraw());
1678    result.append(buffer);
1679    snprintf(buffer, SIZE,
1680            "  last eglSwapBuffers() time: %f us\n"
1681            "  last transaction time     : %f us\n"
1682            "  transaction-flags         : %08x\n"
1683            "  refresh-rate              : %f fps\n"
1684            "  x-dpi                     : %f\n"
1685            "  y-dpi                     : %f\n"
1686            "  density                   : %f\n",
1687            mLastSwapBufferTime/1000.0,
1688            mLastTransactionTime/1000.0,
1689            mTransactionFlags,
1690            hw.getRefreshRate(),
1691            hw.getDpiX(),
1692            hw.getDpiY(),
1693            hw.getDensity());
1694    result.append(buffer);
1695
1696    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1697            inSwapBuffersDuration/1000.0);
1698    result.append(buffer);
1699
1700    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1701            inTransactionDuration/1000.0);
1702    result.append(buffer);
1703
1704    /*
1705     * VSYNC state
1706     */
1707    mEventThread->dump(result, buffer, SIZE);
1708
1709    /*
1710     * Dump HWComposer state
1711     */
1712    HWComposer& hwc(hw.getHwComposer());
1713    snprintf(buffer, SIZE, "h/w composer state:\n");
1714    result.append(buffer);
1715    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1716            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1717                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1718    result.append(buffer);
1719    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1720
1721    /*
1722     * Dump gralloc state
1723     */
1724    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1725    alloc.dump(result);
1726    hw.dump(result);
1727}
1728
1729status_t SurfaceFlinger::onTransact(
1730    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1731{
1732    switch (code) {
1733        case CREATE_CONNECTION:
1734        case SET_TRANSACTION_STATE:
1735        case SET_ORIENTATION:
1736        case BOOT_FINISHED:
1737        case TURN_ELECTRON_BEAM_OFF:
1738        case TURN_ELECTRON_BEAM_ON:
1739        {
1740            // codes that require permission check
1741            IPCThreadState* ipc = IPCThreadState::self();
1742            const int pid = ipc->getCallingPid();
1743            const int uid = ipc->getCallingUid();
1744            if ((uid != AID_GRAPHICS) &&
1745                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1746                ALOGE("Permission Denial: "
1747                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1748                return PERMISSION_DENIED;
1749            }
1750            break;
1751        }
1752        case CAPTURE_SCREEN:
1753        {
1754            // codes that require permission check
1755            IPCThreadState* ipc = IPCThreadState::self();
1756            const int pid = ipc->getCallingPid();
1757            const int uid = ipc->getCallingUid();
1758            if ((uid != AID_GRAPHICS) &&
1759                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1760                ALOGE("Permission Denial: "
1761                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1762                return PERMISSION_DENIED;
1763            }
1764            break;
1765        }
1766    }
1767
1768    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1769    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1770        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1771        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1772            IPCThreadState* ipc = IPCThreadState::self();
1773            const int pid = ipc->getCallingPid();
1774            const int uid = ipc->getCallingUid();
1775            ALOGE("Permission Denial: "
1776                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1777            return PERMISSION_DENIED;
1778        }
1779        int n;
1780        switch (code) {
1781            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1782            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1783                return NO_ERROR;
1784            case 1002:  // SHOW_UPDATES
1785                n = data.readInt32();
1786                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1787                invalidateHwcGeometry();
1788                repaintEverything();
1789                return NO_ERROR;
1790            case 1003:  // SHOW_BACKGROUND
1791                n = data.readInt32();
1792                mDebugBackground = n ? 1 : 0;
1793                return NO_ERROR;
1794            case 1004:{ // repaint everything
1795                repaintEverything();
1796                return NO_ERROR;
1797            }
1798            case 1005:{ // force transaction
1799                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1800                return NO_ERROR;
1801            }
1802            case 1006:{ // send empty update
1803                signalRefresh();
1804                return NO_ERROR;
1805            }
1806            case 1008:  // toggle use of hw composer
1807                n = data.readInt32();
1808                mDebugDisableHWC = n ? 1 : 0;
1809                invalidateHwcGeometry();
1810                repaintEverything();
1811                return NO_ERROR;
1812            case 1009:  // toggle use of transform hint
1813                n = data.readInt32();
1814                mDebugDisableTransformHint = n ? 1 : 0;
1815                invalidateHwcGeometry();
1816                repaintEverything();
1817                return NO_ERROR;
1818            case 1010:  // interrogate.
1819                reply->writeInt32(0);
1820                reply->writeInt32(0);
1821                reply->writeInt32(mDebugRegion);
1822                reply->writeInt32(mDebugBackground);
1823                reply->writeInt32(mDebugDisableHWC);
1824                return NO_ERROR;
1825            case 1013: {
1826                Mutex::Autolock _l(mStateLock);
1827                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1828                reply->writeInt32(hw.getPageFlipCount());
1829            }
1830            return NO_ERROR;
1831        }
1832    }
1833    return err;
1834}
1835
1836void SurfaceFlinger::repaintEverything() {
1837    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1838    const Rect bounds(hw.getBounds());
1839    setInvalidateRegion(Region(bounds));
1840    signalTransaction();
1841}
1842
1843void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1844    Mutex::Autolock _l(mInvalidateLock);
1845    mInvalidateRegion = reg;
1846}
1847
1848Region SurfaceFlinger::getAndClearInvalidateRegion() {
1849    Mutex::Autolock _l(mInvalidateLock);
1850    Region reg(mInvalidateRegion);
1851    mInvalidateRegion.clear();
1852    return reg;
1853}
1854
1855// ---------------------------------------------------------------------------
1856
1857status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1858        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1859{
1860    Mutex::Autolock _l(mStateLock);
1861    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1862}
1863
1864status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1865        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1866{
1867    if (!GLExtensions::getInstance().haveFramebufferObject())
1868        return INVALID_OPERATION;
1869
1870    // get screen geometry
1871    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1872    const uint32_t hw_w = hw.getWidth();
1873    const uint32_t hw_h = hw.getHeight();
1874    GLfloat u = 1;
1875    GLfloat v = 1;
1876
1877    // make sure to clear all GL error flags
1878    while ( glGetError() != GL_NO_ERROR ) ;
1879
1880    // create a FBO
1881    GLuint name, tname;
1882    glGenTextures(1, &tname);
1883    glBindTexture(GL_TEXTURE_2D, tname);
1884    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1885            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1886    if (glGetError() != GL_NO_ERROR) {
1887        while ( glGetError() != GL_NO_ERROR ) ;
1888        GLint tw = (2 << (31 - clz(hw_w)));
1889        GLint th = (2 << (31 - clz(hw_h)));
1890        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1891                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1892        u = GLfloat(hw_w) / tw;
1893        v = GLfloat(hw_h) / th;
1894    }
1895    glGenFramebuffersOES(1, &name);
1896    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1897    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1898            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1899
1900    // redraw the screen entirely...
1901    glDisable(GL_TEXTURE_EXTERNAL_OES);
1902    glDisable(GL_TEXTURE_2D);
1903    glDisable(GL_SCISSOR_TEST);
1904    glClearColor(0,0,0,1);
1905    glClear(GL_COLOR_BUFFER_BIT);
1906    glEnable(GL_SCISSOR_TEST);
1907    glMatrixMode(GL_MODELVIEW);
1908    glLoadIdentity();
1909    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1910    const size_t count = layers.size();
1911    for (size_t i=0 ; i<count ; ++i) {
1912        const sp<LayerBase>& layer(layers[i]);
1913        layer->drawForSreenShot();
1914    }
1915
1916    hw.compositionComplete();
1917
1918    // back to main framebuffer
1919    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1920    glDisable(GL_SCISSOR_TEST);
1921    glDeleteFramebuffersOES(1, &name);
1922
1923    *textureName = tname;
1924    *uOut = u;
1925    *vOut = v;
1926    return NO_ERROR;
1927}
1928
1929// ---------------------------------------------------------------------------
1930
1931status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1932{
1933    // get screen geometry
1934    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1935    const uint32_t hw_w = hw.getWidth();
1936    const uint32_t hw_h = hw.getHeight();
1937    const Region screenBounds(hw.getBounds());
1938
1939    GLfloat u, v;
1940    GLuint tname;
1941    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1942    if (result != NO_ERROR) {
1943        return result;
1944    }
1945
1946    GLfloat vtx[8];
1947    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1948    glBindTexture(GL_TEXTURE_2D, tname);
1949    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1950    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1951    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1952    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1953    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1954    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1955    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1956    glVertexPointer(2, GL_FLOAT, 0, vtx);
1957
1958    /*
1959     * Texture coordinate mapping
1960     *
1961     *                 u
1962     *    1 +----------+---+
1963     *      |     |    |   |  image is inverted
1964     *      |     V    |   |  w.r.t. the texture
1965     *  1-v +----------+   |  coordinates
1966     *      |              |
1967     *      |              |
1968     *      |              |
1969     *    0 +--------------+
1970     *      0              1
1971     *
1972     */
1973
1974    class s_curve_interpolator {
1975        const float nbFrames, s, v;
1976    public:
1977        s_curve_interpolator(int nbFrames, float s)
1978        : nbFrames(1.0f / (nbFrames-1)), s(s),
1979          v(1.0f + expf(-s + 0.5f*s)) {
1980        }
1981        float operator()(int f) {
1982            const float x = f * nbFrames;
1983            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1984        }
1985    };
1986
1987    class v_stretch {
1988        const GLfloat hw_w, hw_h;
1989    public:
1990        v_stretch(uint32_t hw_w, uint32_t hw_h)
1991        : hw_w(hw_w), hw_h(hw_h) {
1992        }
1993        void operator()(GLfloat* vtx, float v) {
1994            const GLfloat w = hw_w + (hw_w * v);
1995            const GLfloat h = hw_h - (hw_h * v);
1996            const GLfloat x = (hw_w - w) * 0.5f;
1997            const GLfloat y = (hw_h - h) * 0.5f;
1998            vtx[0] = x;         vtx[1] = y;
1999            vtx[2] = x;         vtx[3] = y + h;
2000            vtx[4] = x + w;     vtx[5] = y + h;
2001            vtx[6] = x + w;     vtx[7] = y;
2002        }
2003    };
2004
2005    class h_stretch {
2006        const GLfloat hw_w, hw_h;
2007    public:
2008        h_stretch(uint32_t hw_w, uint32_t hw_h)
2009        : hw_w(hw_w), hw_h(hw_h) {
2010        }
2011        void operator()(GLfloat* vtx, float v) {
2012            const GLfloat w = hw_w - (hw_w * v);
2013            const GLfloat h = 1.0f;
2014            const GLfloat x = (hw_w - w) * 0.5f;
2015            const GLfloat y = (hw_h - h) * 0.5f;
2016            vtx[0] = x;         vtx[1] = y;
2017            vtx[2] = x;         vtx[3] = y + h;
2018            vtx[4] = x + w;     vtx[5] = y + h;
2019            vtx[6] = x + w;     vtx[7] = y;
2020        }
2021    };
2022
2023    // the full animation is 24 frames
2024    char value[PROPERTY_VALUE_MAX];
2025    property_get("debug.sf.electron_frames", value, "24");
2026    int nbFrames = (atoi(value) + 1) >> 1;
2027    if (nbFrames <= 0) // just in case
2028        nbFrames = 24;
2029
2030    s_curve_interpolator itr(nbFrames, 7.5f);
2031    s_curve_interpolator itg(nbFrames, 8.0f);
2032    s_curve_interpolator itb(nbFrames, 8.5f);
2033
2034    v_stretch vverts(hw_w, hw_h);
2035
2036    glMatrixMode(GL_TEXTURE);
2037    glLoadIdentity();
2038    glMatrixMode(GL_MODELVIEW);
2039    glLoadIdentity();
2040
2041    glEnable(GL_BLEND);
2042    glBlendFunc(GL_ONE, GL_ONE);
2043    for (int i=0 ; i<nbFrames ; i++) {
2044        float x, y, w, h;
2045        const float vr = itr(i);
2046        const float vg = itg(i);
2047        const float vb = itb(i);
2048
2049        // clear screen
2050        glColorMask(1,1,1,1);
2051        glClear(GL_COLOR_BUFFER_BIT);
2052        glEnable(GL_TEXTURE_2D);
2053
2054        // draw the red plane
2055        vverts(vtx, vr);
2056        glColorMask(1,0,0,1);
2057        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2058
2059        // draw the green plane
2060        vverts(vtx, vg);
2061        glColorMask(0,1,0,1);
2062        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2063
2064        // draw the blue plane
2065        vverts(vtx, vb);
2066        glColorMask(0,0,1,1);
2067        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2068
2069        // draw the white highlight (we use the last vertices)
2070        glDisable(GL_TEXTURE_2D);
2071        glColorMask(1,1,1,1);
2072        glColor4f(vg, vg, vg, 1);
2073        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2074        hw.flip(screenBounds);
2075    }
2076
2077    h_stretch hverts(hw_w, hw_h);
2078    glDisable(GL_BLEND);
2079    glDisable(GL_TEXTURE_2D);
2080    glColorMask(1,1,1,1);
2081    for (int i=0 ; i<nbFrames ; i++) {
2082        const float v = itg(i);
2083        hverts(vtx, v);
2084        glClear(GL_COLOR_BUFFER_BIT);
2085        glColor4f(1-v, 1-v, 1-v, 1);
2086        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2087        hw.flip(screenBounds);
2088    }
2089
2090    glColorMask(1,1,1,1);
2091    glEnable(GL_SCISSOR_TEST);
2092    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2093    glDeleteTextures(1, &tname);
2094    glDisable(GL_TEXTURE_2D);
2095    glDisable(GL_BLEND);
2096    return NO_ERROR;
2097}
2098
2099status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2100{
2101    status_t result = PERMISSION_DENIED;
2102
2103    if (!GLExtensions::getInstance().haveFramebufferObject())
2104        return INVALID_OPERATION;
2105
2106
2107    // get screen geometry
2108    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2109    const uint32_t hw_w = hw.getWidth();
2110    const uint32_t hw_h = hw.getHeight();
2111    const Region screenBounds(hw.bounds());
2112
2113    GLfloat u, v;
2114    GLuint tname;
2115    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2116    if (result != NO_ERROR) {
2117        return result;
2118    }
2119
2120    GLfloat vtx[8];
2121    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2122    glBindTexture(GL_TEXTURE_2D, tname);
2123    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2124    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2125    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2126    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2127    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2128    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2129    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2130    glVertexPointer(2, GL_FLOAT, 0, vtx);
2131
2132    class s_curve_interpolator {
2133        const float nbFrames, s, v;
2134    public:
2135        s_curve_interpolator(int nbFrames, float s)
2136        : nbFrames(1.0f / (nbFrames-1)), s(s),
2137          v(1.0f + expf(-s + 0.5f*s)) {
2138        }
2139        float operator()(int f) {
2140            const float x = f * nbFrames;
2141            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2142        }
2143    };
2144
2145    class v_stretch {
2146        const GLfloat hw_w, hw_h;
2147    public:
2148        v_stretch(uint32_t hw_w, uint32_t hw_h)
2149        : hw_w(hw_w), hw_h(hw_h) {
2150        }
2151        void operator()(GLfloat* vtx, float v) {
2152            const GLfloat w = hw_w + (hw_w * v);
2153            const GLfloat h = hw_h - (hw_h * v);
2154            const GLfloat x = (hw_w - w) * 0.5f;
2155            const GLfloat y = (hw_h - h) * 0.5f;
2156            vtx[0] = x;         vtx[1] = y;
2157            vtx[2] = x;         vtx[3] = y + h;
2158            vtx[4] = x + w;     vtx[5] = y + h;
2159            vtx[6] = x + w;     vtx[7] = y;
2160        }
2161    };
2162
2163    class h_stretch {
2164        const GLfloat hw_w, hw_h;
2165    public:
2166        h_stretch(uint32_t hw_w, uint32_t hw_h)
2167        : hw_w(hw_w), hw_h(hw_h) {
2168        }
2169        void operator()(GLfloat* vtx, float v) {
2170            const GLfloat w = hw_w - (hw_w * v);
2171            const GLfloat h = 1.0f;
2172            const GLfloat x = (hw_w - w) * 0.5f;
2173            const GLfloat y = (hw_h - h) * 0.5f;
2174            vtx[0] = x;         vtx[1] = y;
2175            vtx[2] = x;         vtx[3] = y + h;
2176            vtx[4] = x + w;     vtx[5] = y + h;
2177            vtx[6] = x + w;     vtx[7] = y;
2178        }
2179    };
2180
2181    // the full animation is 12 frames
2182    int nbFrames = 8;
2183    s_curve_interpolator itr(nbFrames, 7.5f);
2184    s_curve_interpolator itg(nbFrames, 8.0f);
2185    s_curve_interpolator itb(nbFrames, 8.5f);
2186
2187    h_stretch hverts(hw_w, hw_h);
2188    glDisable(GL_BLEND);
2189    glDisable(GL_TEXTURE_2D);
2190    glColorMask(1,1,1,1);
2191    for (int i=nbFrames-1 ; i>=0 ; i--) {
2192        const float v = itg(i);
2193        hverts(vtx, v);
2194        glClear(GL_COLOR_BUFFER_BIT);
2195        glColor4f(1-v, 1-v, 1-v, 1);
2196        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2197        hw.flip(screenBounds);
2198    }
2199
2200    nbFrames = 4;
2201    v_stretch vverts(hw_w, hw_h);
2202    glEnable(GL_BLEND);
2203    glBlendFunc(GL_ONE, GL_ONE);
2204    for (int i=nbFrames-1 ; i>=0 ; i--) {
2205        float x, y, w, h;
2206        const float vr = itr(i);
2207        const float vg = itg(i);
2208        const float vb = itb(i);
2209
2210        // clear screen
2211        glColorMask(1,1,1,1);
2212        glClear(GL_COLOR_BUFFER_BIT);
2213        glEnable(GL_TEXTURE_2D);
2214
2215        // draw the red plane
2216        vverts(vtx, vr);
2217        glColorMask(1,0,0,1);
2218        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2219
2220        // draw the green plane
2221        vverts(vtx, vg);
2222        glColorMask(0,1,0,1);
2223        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2224
2225        // draw the blue plane
2226        vverts(vtx, vb);
2227        glColorMask(0,0,1,1);
2228        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2229
2230        hw.flip(screenBounds);
2231    }
2232
2233    glColorMask(1,1,1,1);
2234    glEnable(GL_SCISSOR_TEST);
2235    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2236    glDeleteTextures(1, &tname);
2237    glDisable(GL_TEXTURE_2D);
2238    glDisable(GL_BLEND);
2239
2240    return NO_ERROR;
2241}
2242
2243// ---------------------------------------------------------------------------
2244
2245status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2246{
2247    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2248    if (!hw.canDraw()) {
2249        // we're already off
2250        return NO_ERROR;
2251    }
2252
2253    // turn off hwc while we're doing the animation
2254    hw.getHwComposer().disable();
2255    // and make sure to turn it back on (if needed) next time we compose
2256    invalidateHwcGeometry();
2257
2258    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2259        electronBeamOffAnimationImplLocked();
2260    }
2261
2262    // always clear the whole screen at the end of the animation
2263    glClearColor(0,0,0,1);
2264    glDisable(GL_SCISSOR_TEST);
2265    glClear(GL_COLOR_BUFFER_BIT);
2266    glEnable(GL_SCISSOR_TEST);
2267    hw.flip( Region(hw.bounds()) );
2268
2269    return NO_ERROR;
2270}
2271
2272status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2273{
2274    class MessageTurnElectronBeamOff : public MessageBase {
2275        SurfaceFlinger* flinger;
2276        int32_t mode;
2277        status_t result;
2278    public:
2279        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2280            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2281        }
2282        status_t getResult() const {
2283            return result;
2284        }
2285        virtual bool handler() {
2286            Mutex::Autolock _l(flinger->mStateLock);
2287            result = flinger->turnElectronBeamOffImplLocked(mode);
2288            return true;
2289        }
2290    };
2291
2292    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2293    status_t res = postMessageSync(msg);
2294    if (res == NO_ERROR) {
2295        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2296
2297        // work-around: when the power-manager calls us we activate the
2298        // animation. eventually, the "on" animation will be called
2299        // by the power-manager itself
2300        mElectronBeamAnimationMode = mode;
2301    }
2302    return res;
2303}
2304
2305// ---------------------------------------------------------------------------
2306
2307status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2308{
2309    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2310    if (hw.canDraw()) {
2311        // we're already on
2312        return NO_ERROR;
2313    }
2314    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2315        electronBeamOnAnimationImplLocked();
2316    }
2317
2318    // make sure to redraw the whole screen when the animation is done
2319    mDirtyRegion.set(hw.bounds());
2320    signalTransaction();
2321
2322    return NO_ERROR;
2323}
2324
2325status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2326{
2327    class MessageTurnElectronBeamOn : public MessageBase {
2328        SurfaceFlinger* flinger;
2329        int32_t mode;
2330        status_t result;
2331    public:
2332        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2333            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2334        }
2335        status_t getResult() const {
2336            return result;
2337        }
2338        virtual bool handler() {
2339            Mutex::Autolock _l(flinger->mStateLock);
2340            result = flinger->turnElectronBeamOnImplLocked(mode);
2341            return true;
2342        }
2343    };
2344
2345    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2346    return NO_ERROR;
2347}
2348
2349// ---------------------------------------------------------------------------
2350
2351status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2352        sp<IMemoryHeap>* heap,
2353        uint32_t* w, uint32_t* h, PixelFormat* f,
2354        uint32_t sw, uint32_t sh,
2355        uint32_t minLayerZ, uint32_t maxLayerZ)
2356{
2357    ATRACE_CALL();
2358
2359    status_t result = PERMISSION_DENIED;
2360
2361    // only one display supported for now
2362    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2363        return BAD_VALUE;
2364
2365    if (!GLExtensions::getInstance().haveFramebufferObject())
2366        return INVALID_OPERATION;
2367
2368    // get screen geometry
2369    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2370    const uint32_t hw_w = hw.getWidth();
2371    const uint32_t hw_h = hw.getHeight();
2372
2373    if ((sw > hw_w) || (sh > hw_h))
2374        return BAD_VALUE;
2375
2376    sw = (!sw) ? hw_w : sw;
2377    sh = (!sh) ? hw_h : sh;
2378    const size_t size = sw * sh * 4;
2379
2380    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2381    //        sw, sh, minLayerZ, maxLayerZ);
2382
2383    // make sure to clear all GL error flags
2384    while ( glGetError() != GL_NO_ERROR ) ;
2385
2386    // create a FBO
2387    GLuint name, tname;
2388    glGenRenderbuffersOES(1, &tname);
2389    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2390    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2391
2392    glGenFramebuffersOES(1, &name);
2393    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2394    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2395            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2396
2397    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2398
2399    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2400
2401        // invert everything, b/c glReadPixel() below will invert the FB
2402        glViewport(0, 0, sw, sh);
2403        glScissor(0, 0, sw, sh);
2404        glEnable(GL_SCISSOR_TEST);
2405        glMatrixMode(GL_PROJECTION);
2406        glPushMatrix();
2407        glLoadIdentity();
2408        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2409        glMatrixMode(GL_MODELVIEW);
2410
2411        // redraw the screen entirely...
2412        glClearColor(0,0,0,1);
2413        glClear(GL_COLOR_BUFFER_BIT);
2414
2415        const LayerVector& layers(mDrawingState.layersSortedByZ);
2416        const size_t count = layers.size();
2417        for (size_t i=0 ; i<count ; ++i) {
2418            const sp<LayerBase>& layer(layers[i]);
2419            const uint32_t flags = layer->drawingState().flags;
2420            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2421                const uint32_t z = layer->drawingState().z;
2422                if (z >= minLayerZ && z <= maxLayerZ) {
2423                    layer->drawForSreenShot();
2424                }
2425            }
2426        }
2427
2428        // XXX: this is needed on tegra
2429        glEnable(GL_SCISSOR_TEST);
2430        glScissor(0, 0, sw, sh);
2431
2432        // check for errors and return screen capture
2433        if (glGetError() != GL_NO_ERROR) {
2434            // error while rendering
2435            result = INVALID_OPERATION;
2436        } else {
2437            // allocate shared memory large enough to hold the
2438            // screen capture
2439            sp<MemoryHeapBase> base(
2440                    new MemoryHeapBase(size, 0, "screen-capture") );
2441            void* const ptr = base->getBase();
2442            if (ptr) {
2443                // capture the screen with glReadPixels()
2444                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2445                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2446                if (glGetError() == GL_NO_ERROR) {
2447                    *heap = base;
2448                    *w = sw;
2449                    *h = sh;
2450                    *f = PIXEL_FORMAT_RGBA_8888;
2451                    result = NO_ERROR;
2452                }
2453            } else {
2454                result = NO_MEMORY;
2455            }
2456        }
2457        glEnable(GL_SCISSOR_TEST);
2458        glViewport(0, 0, hw_w, hw_h);
2459        glMatrixMode(GL_PROJECTION);
2460        glPopMatrix();
2461        glMatrixMode(GL_MODELVIEW);
2462    } else {
2463        result = BAD_VALUE;
2464    }
2465
2466    // release FBO resources
2467    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2468    glDeleteRenderbuffersOES(1, &tname);
2469    glDeleteFramebuffersOES(1, &name);
2470
2471    hw.compositionComplete();
2472
2473    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2474
2475    return result;
2476}
2477
2478
2479status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2480        sp<IMemoryHeap>* heap,
2481        uint32_t* width, uint32_t* height, PixelFormat* format,
2482        uint32_t sw, uint32_t sh,
2483        uint32_t minLayerZ, uint32_t maxLayerZ)
2484{
2485    // only one display supported for now
2486    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2487        return BAD_VALUE;
2488
2489    if (!GLExtensions::getInstance().haveFramebufferObject())
2490        return INVALID_OPERATION;
2491
2492    class MessageCaptureScreen : public MessageBase {
2493        SurfaceFlinger* flinger;
2494        DisplayID dpy;
2495        sp<IMemoryHeap>* heap;
2496        uint32_t* w;
2497        uint32_t* h;
2498        PixelFormat* f;
2499        uint32_t sw;
2500        uint32_t sh;
2501        uint32_t minLayerZ;
2502        uint32_t maxLayerZ;
2503        status_t result;
2504    public:
2505        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2506                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2507                uint32_t sw, uint32_t sh,
2508                uint32_t minLayerZ, uint32_t maxLayerZ)
2509            : flinger(flinger), dpy(dpy),
2510              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2511              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2512              result(PERMISSION_DENIED)
2513        {
2514        }
2515        status_t getResult() const {
2516            return result;
2517        }
2518        virtual bool handler() {
2519            Mutex::Autolock _l(flinger->mStateLock);
2520
2521            // if we have secure windows, never allow the screen capture
2522            if (flinger->mSecureFrameBuffer)
2523                return true;
2524
2525            result = flinger->captureScreenImplLocked(dpy,
2526                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2527
2528            return true;
2529        }
2530    };
2531
2532    sp<MessageBase> msg = new MessageCaptureScreen(this,
2533            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2534    status_t res = postMessageSync(msg);
2535    if (res == NO_ERROR) {
2536        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2537    }
2538    return res;
2539}
2540
2541// ---------------------------------------------------------------------------
2542
2543sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2544{
2545    sp<Layer> result;
2546    Mutex::Autolock _l(mStateLock);
2547    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2548    return result;
2549}
2550
2551// ---------------------------------------------------------------------------
2552
2553Client::Client(const sp<SurfaceFlinger>& flinger)
2554    : mFlinger(flinger), mNameGenerator(1)
2555{
2556}
2557
2558Client::~Client()
2559{
2560    const size_t count = mLayers.size();
2561    for (size_t i=0 ; i<count ; i++) {
2562        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2563        if (layer != 0) {
2564            mFlinger->removeLayer(layer);
2565        }
2566    }
2567}
2568
2569status_t Client::initCheck() const {
2570    return NO_ERROR;
2571}
2572
2573size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2574{
2575    Mutex::Autolock _l(mLock);
2576    size_t name = mNameGenerator++;
2577    mLayers.add(name, layer);
2578    return name;
2579}
2580
2581void Client::detachLayer(const LayerBaseClient* layer)
2582{
2583    Mutex::Autolock _l(mLock);
2584    // we do a linear search here, because this doesn't happen often
2585    const size_t count = mLayers.size();
2586    for (size_t i=0 ; i<count ; i++) {
2587        if (mLayers.valueAt(i) == layer) {
2588            mLayers.removeItemsAt(i, 1);
2589            break;
2590        }
2591    }
2592}
2593sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2594{
2595    Mutex::Autolock _l(mLock);
2596    sp<LayerBaseClient> lbc;
2597    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2598    if (layer != 0) {
2599        lbc = layer.promote();
2600        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2601    }
2602    return lbc;
2603}
2604
2605
2606status_t Client::onTransact(
2607    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2608{
2609    // these must be checked
2610     IPCThreadState* ipc = IPCThreadState::self();
2611     const int pid = ipc->getCallingPid();
2612     const int uid = ipc->getCallingUid();
2613     const int self_pid = getpid();
2614     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2615         // we're called from a different process, do the real check
2616         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2617         {
2618             ALOGE("Permission Denial: "
2619                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2620             return PERMISSION_DENIED;
2621         }
2622     }
2623     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2624}
2625
2626
2627sp<ISurface> Client::createSurface(
2628        ISurfaceComposerClient::surface_data_t* params,
2629        const String8& name,
2630        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2631        uint32_t flags)
2632{
2633    /*
2634     * createSurface must be called from the GL thread so that it can
2635     * have access to the GL context.
2636     */
2637
2638    class MessageCreateSurface : public MessageBase {
2639        sp<ISurface> result;
2640        SurfaceFlinger* flinger;
2641        ISurfaceComposerClient::surface_data_t* params;
2642        Client* client;
2643        const String8& name;
2644        DisplayID display;
2645        uint32_t w, h;
2646        PixelFormat format;
2647        uint32_t flags;
2648    public:
2649        MessageCreateSurface(SurfaceFlinger* flinger,
2650                ISurfaceComposerClient::surface_data_t* params,
2651                const String8& name, Client* client,
2652                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2653                uint32_t flags)
2654            : flinger(flinger), params(params), client(client), name(name),
2655              display(display), w(w), h(h), format(format), flags(flags)
2656        {
2657        }
2658        sp<ISurface> getResult() const { return result; }
2659        virtual bool handler() {
2660            result = flinger->createSurface(params, name, client,
2661                    display, w, h, format, flags);
2662            return true;
2663        }
2664    };
2665
2666    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2667            params, name, this, display, w, h, format, flags);
2668    mFlinger->postMessageSync(msg);
2669    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2670}
2671status_t Client::destroySurface(SurfaceID sid) {
2672    return mFlinger->removeSurface(this, sid);
2673}
2674
2675// ---------------------------------------------------------------------------
2676
2677GraphicBufferAlloc::GraphicBufferAlloc() {}
2678
2679GraphicBufferAlloc::~GraphicBufferAlloc() {}
2680
2681sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2682        PixelFormat format, uint32_t usage, status_t* error) {
2683    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2684    status_t err = graphicBuffer->initCheck();
2685    *error = err;
2686    if (err != 0 || graphicBuffer->handle == 0) {
2687        if (err == NO_MEMORY) {
2688            GraphicBuffer::dumpAllocationsToSystemLog();
2689        }
2690        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2691             "failed (%s), handle=%p",
2692                w, h, strerror(-err), graphicBuffer->handle);
2693        return 0;
2694    }
2695    return graphicBuffer;
2696}
2697
2698// ---------------------------------------------------------------------------
2699
2700GraphicPlane::GraphicPlane()
2701    : mHw(0)
2702{
2703}
2704
2705GraphicPlane::~GraphicPlane() {
2706    delete mHw;
2707}
2708
2709bool GraphicPlane::initialized() const {
2710    return mHw ? true : false;
2711}
2712
2713int GraphicPlane::getWidth() const {
2714    return mWidth;
2715}
2716
2717int GraphicPlane::getHeight() const {
2718    return mHeight;
2719}
2720
2721void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2722{
2723    mHw = hw;
2724
2725    // initialize the display orientation transform.
2726    // it's a constant that should come from the display driver.
2727    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2728    char property[PROPERTY_VALUE_MAX];
2729    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2730        //displayOrientation
2731        switch (atoi(property)) {
2732        case 90:
2733            displayOrientation = ISurfaceComposer::eOrientation90;
2734            break;
2735        case 270:
2736            displayOrientation = ISurfaceComposer::eOrientation270;
2737            break;
2738        }
2739    }
2740
2741    const float w = hw->getWidth();
2742    const float h = hw->getHeight();
2743    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2744            &mDisplayTransform);
2745    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2746        mDisplayWidth = h;
2747        mDisplayHeight = w;
2748    } else {
2749        mDisplayWidth = w;
2750        mDisplayHeight = h;
2751    }
2752
2753    setOrientation(ISurfaceComposer::eOrientationDefault);
2754}
2755
2756status_t GraphicPlane::orientationToTransfrom(
2757        int orientation, int w, int h, Transform* tr)
2758{
2759    uint32_t flags = 0;
2760    switch (orientation) {
2761    case ISurfaceComposer::eOrientationDefault:
2762        flags = Transform::ROT_0;
2763        break;
2764    case ISurfaceComposer::eOrientation90:
2765        flags = Transform::ROT_90;
2766        break;
2767    case ISurfaceComposer::eOrientation180:
2768        flags = Transform::ROT_180;
2769        break;
2770    case ISurfaceComposer::eOrientation270:
2771        flags = Transform::ROT_270;
2772        break;
2773    default:
2774        return BAD_VALUE;
2775    }
2776    tr->set(flags, w, h);
2777    return NO_ERROR;
2778}
2779
2780status_t GraphicPlane::setOrientation(int orientation)
2781{
2782    // If the rotation can be handled in hardware, this is where
2783    // the magic should happen.
2784
2785    const DisplayHardware& hw(displayHardware());
2786    const float w = mDisplayWidth;
2787    const float h = mDisplayHeight;
2788    mWidth = int(w);
2789    mHeight = int(h);
2790
2791    Transform orientationTransform;
2792    GraphicPlane::orientationToTransfrom(orientation, w, h,
2793            &orientationTransform);
2794    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2795        mWidth = int(h);
2796        mHeight = int(w);
2797    }
2798
2799    mOrientation = orientation;
2800    mGlobalTransform = mDisplayTransform * orientationTransform;
2801    return NO_ERROR;
2802}
2803
2804const DisplayHardware& GraphicPlane::displayHardware() const {
2805    return *mHw;
2806}
2807
2808DisplayHardware& GraphicPlane::editDisplayHardware() {
2809    return *mHw;
2810}
2811
2812const Transform& GraphicPlane::transform() const {
2813    return mGlobalTransform;
2814}
2815
2816EGLDisplay GraphicPlane::getEGLDisplay() const {
2817    return mHw->getEGLDisplay();
2818}
2819
2820// ---------------------------------------------------------------------------
2821
2822}; // namespace android
2823