SurfaceFlinger.cpp revision 1c8e95cf86f2182986385bc1ee85f13f425f3a3a 
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    property_get("debug.sf.ddms", value, "0");
120    mDebugDDMS = atoi(value);
121    if (mDebugDDMS) {
122        DdmConnection::start(getServiceName());
123    }
124
125    ALOGI_IF(mDebugRegion,       "showupdates enabled");
126    ALOGI_IF(mDebugBackground,   "showbackground enabled");
127    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
128}
129
130void SurfaceFlinger::onFirstRef()
131{
132    mEventQueue.init(this);
133
134    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
135
136    // Wait for the main thread to be done with its initialization
137    mReadyToRunBarrier.wait();
138}
139
140
141SurfaceFlinger::~SurfaceFlinger()
142{
143    glDeleteTextures(1, &mWormholeTexName);
144}
145
146void SurfaceFlinger::binderDied(const wp<IBinder>& who)
147{
148    // the window manager died on us. prepare its eulogy.
149
150    // reset screen orientation
151    Vector<ComposerState> state;
152    setTransactionState(state, eOrientationDefault, 0);
153
154    // restart the boot-animation
155    property_set("ctl.start", "bootanim");
156}
157
158sp<IMemoryHeap> SurfaceFlinger::getCblk() const
159{
160    return mServerHeap;
161}
162
163sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
164{
165    sp<ISurfaceComposerClient> bclient;
166    sp<Client> client(new Client(this));
167    status_t err = client->initCheck();
168    if (err == NO_ERROR) {
169        bclient = client;
170    }
171    return bclient;
172}
173
174sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
175{
176    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
177    return gba;
178}
179
180const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
181{
182    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
183    const GraphicPlane& plane(mGraphicPlanes[dpy]);
184    return plane;
185}
186
187GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
188{
189    return const_cast<GraphicPlane&>(
190        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
191}
192
193void SurfaceFlinger::bootFinished()
194{
195    const nsecs_t now = systemTime();
196    const nsecs_t duration = now - mBootTime;
197    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
198    mBootFinished = true;
199
200    // wait patiently for the window manager death
201    const String16 name("window");
202    sp<IBinder> window(defaultServiceManager()->getService(name));
203    if (window != 0) {
204        window->linkToDeath(this);
205    }
206
207    // stop boot animation
208    property_set("ctl.stop", "bootanim");
209}
210
211static inline uint16_t pack565(int r, int g, int b) {
212    return (r<<11)|(g<<5)|b;
213}
214
215status_t SurfaceFlinger::readyToRun()
216{
217    ALOGI(   "SurfaceFlinger's main thread ready to run. "
218            "Initializing graphics H/W...");
219
220    // we only support one display currently
221    int dpy = 0;
222
223    {
224        // initialize the main display
225        GraphicPlane& plane(graphicPlane(dpy));
226        DisplayHardware* const hw = new DisplayHardware(this, dpy);
227        plane.setDisplayHardware(hw);
228    }
229
230    // create the shared control-block
231    mServerHeap = new MemoryHeapBase(4096,
232            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
233    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
234
235    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
236    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
237
238    new(mServerCblk) surface_flinger_cblk_t;
239
240    // initialize primary screen
241    // (other display should be initialized in the same manner, but
242    // asynchronously, as they could come and go. None of this is supported
243    // yet).
244    const GraphicPlane& plane(graphicPlane(dpy));
245    const DisplayHardware& hw = plane.displayHardware();
246    const uint32_t w = hw.getWidth();
247    const uint32_t h = hw.getHeight();
248    const uint32_t f = hw.getFormat();
249    hw.makeCurrent();
250
251    // initialize the shared control block
252    mServerCblk->connected |= 1<<dpy;
253    display_cblk_t* dcblk = mServerCblk->displays + dpy;
254    memset(dcblk, 0, sizeof(display_cblk_t));
255    dcblk->w            = plane.getWidth();
256    dcblk->h            = plane.getHeight();
257    dcblk->format       = f;
258    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
259    dcblk->xdpi         = hw.getDpiX();
260    dcblk->ydpi         = hw.getDpiY();
261    dcblk->fps          = hw.getRefreshRate();
262    dcblk->density      = hw.getDensity();
263
264    // Initialize OpenGL|ES
265    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
266    glPixelStorei(GL_PACK_ALIGNMENT, 4);
267    glEnableClientState(GL_VERTEX_ARRAY);
268    glEnable(GL_SCISSOR_TEST);
269    glShadeModel(GL_FLAT);
270    glDisable(GL_DITHER);
271    glDisable(GL_CULL_FACE);
272
273    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
274    const uint16_t g1 = pack565(0x17,0x2f,0x17);
275    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
276    glGenTextures(1, &mWormholeTexName);
277    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
278    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
282    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
283            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
284
285    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
286    glGenTextures(1, &mProtectedTexName);
287    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
288    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
292    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
293            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
294
295    glViewport(0, 0, w, h);
296    glMatrixMode(GL_PROJECTION);
297    glLoadIdentity();
298    // put the origin in the left-bottom corner
299    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
300
301
302    // start the EventThread
303    mEventThread = new EventThread(this);
304    mEventQueue.setEventThread(mEventThread);
305    hw.startSleepManagement();
306
307    /*
308     *  We're now ready to accept clients...
309     */
310
311    mReadyToRunBarrier.open();
312
313    // start boot animation
314    property_set("ctl.start", "bootanim");
315
316    return NO_ERROR;
317}
318
319// ----------------------------------------------------------------------------
320
321bool SurfaceFlinger::authenticateSurfaceTexture(
322        const sp<ISurfaceTexture>& surfaceTexture) const {
323    Mutex::Autolock _l(mStateLock);
324    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
325
326    // Check the visible layer list for the ISurface
327    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
328    size_t count = currentLayers.size();
329    for (size_t i=0 ; i<count ; i++) {
330        const sp<LayerBase>& layer(currentLayers[i]);
331        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
332        if (lbc != NULL) {
333            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
334            if (lbcBinder == surfaceTextureBinder) {
335                return true;
336            }
337        }
338    }
339
340    // Check the layers in the purgatory.  This check is here so that if a
341    // SurfaceTexture gets destroyed before all the clients are done using it,
342    // the error will not be reported as "surface XYZ is not authenticated", but
343    // will instead fail later on when the client tries to use the surface,
344    // which should be reported as "surface XYZ returned an -ENODEV".  The
345    // purgatorized layers are no less authentic than the visible ones, so this
346    // should not cause any harm.
347    size_t purgatorySize =  mLayerPurgatory.size();
348    for (size_t i=0 ; i<purgatorySize ; i++) {
349        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
350        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
351        if (lbc != NULL) {
352            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
353            if (lbcBinder == surfaceTextureBinder) {
354                return true;
355            }
356        }
357    }
358
359    return false;
360}
361
362// ----------------------------------------------------------------------------
363
364sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
365    return mEventThread->createEventConnection();
366}
367
368// ----------------------------------------------------------------------------
369
370void SurfaceFlinger::waitForEvent() {
371    mEventQueue.waitMessage();
372}
373
374void SurfaceFlinger::signalTransaction() {
375    mEventQueue.invalidate();
376}
377
378void SurfaceFlinger::signalLayerUpdate() {
379    mEventQueue.invalidate();
380}
381
382void SurfaceFlinger::signalRefresh() {
383    mEventQueue.refresh();
384}
385
386status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
387        nsecs_t reltime, uint32_t flags) {
388    return mEventQueue.postMessage(msg, reltime);
389}
390
391status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
392        nsecs_t reltime, uint32_t flags) {
393    status_t res = mEventQueue.postMessage(msg, reltime);
394    if (res == NO_ERROR) {
395        msg->wait();
396    }
397    return res;
398}
399
400bool SurfaceFlinger::threadLoop()
401{
402    waitForEvent();
403    return true;
404}
405
406void SurfaceFlinger::onMessageReceived(int32_t what)
407{
408    ATRACE_CALL();
409    switch (what) {
410        case MessageQueue::REFRESH: {
411//        case MessageQueue::INVALIDATE: {
412            // check for transactions
413            if (CC_UNLIKELY(mConsoleSignals)) {
414                handleConsoleEvents();
415            }
416
417            // if we're in a global transaction, don't do anything.
418            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
419            uint32_t transactionFlags = peekTransactionFlags(mask);
420            if (CC_UNLIKELY(transactionFlags)) {
421                handleTransaction(transactionFlags);
422            }
423
424            // post surfaces (if needed)
425            handlePageFlip();
426
427//            signalRefresh();
428//
429//        } break;
430//
431//        case MessageQueue::REFRESH: {
432
433            handleRefresh();
434
435            const DisplayHardware& hw(graphicPlane(0).displayHardware());
436
437//            if (mDirtyRegion.isEmpty()) {
438//                return;
439//            }
440
441            if (CC_UNLIKELY(mHwWorkListDirty)) {
442                // build the h/w work list
443                handleWorkList();
444            }
445
446            if (CC_LIKELY(hw.canDraw())) {
447                // repaint the framebuffer (if needed)
448                handleRepaint();
449                // inform the h/w that we're done compositing
450                hw.compositionComplete();
451                postFramebuffer();
452            } else {
453                // pretend we did the post
454                hw.compositionComplete();
455            }
456
457        } break;
458    }
459}
460
461void SurfaceFlinger::postFramebuffer()
462{
463    // mSwapRegion can be empty here is some cases, for instance if a hidden
464    // or fully transparent window is updating.
465    // in that case, we need to flip anyways to not risk a deadlock with
466    // h/w composer.
467
468    const DisplayHardware& hw(graphicPlane(0).displayHardware());
469    const nsecs_t now = systemTime();
470    mDebugInSwapBuffers = now;
471    hw.flip(mSwapRegion);
472
473    size_t numLayers = mVisibleLayersSortedByZ.size();
474    for (size_t i = 0; i < numLayers; i++) {
475        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
476    }
477
478    mLastSwapBufferTime = systemTime() - now;
479    mDebugInSwapBuffers = 0;
480    mSwapRegion.clear();
481}
482
483void SurfaceFlinger::handleConsoleEvents()
484{
485    // something to do with the console
486    const DisplayHardware& hw = graphicPlane(0).displayHardware();
487
488    int what = android_atomic_and(0, &mConsoleSignals);
489    if (what & eConsoleAcquired) {
490        hw.acquireScreen();
491        // this is a temporary work-around, eventually this should be called
492        // by the power-manager
493        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
494    }
495
496    if (what & eConsoleReleased) {
497        if (hw.isScreenAcquired()) {
498            hw.releaseScreen();
499        }
500    }
501
502    mDirtyRegion.set(hw.bounds());
503}
504
505void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
506{
507    Mutex::Autolock _l(mStateLock);
508    const nsecs_t now = systemTime();
509    mDebugInTransaction = now;
510
511    // Here we're guaranteed that some transaction flags are set
512    // so we can call handleTransactionLocked() unconditionally.
513    // We call getTransactionFlags(), which will also clear the flags,
514    // with mStateLock held to guarantee that mCurrentState won't change
515    // until the transaction is committed.
516
517    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
518    transactionFlags = getTransactionFlags(mask);
519    handleTransactionLocked(transactionFlags);
520
521    mLastTransactionTime = systemTime() - now;
522    mDebugInTransaction = 0;
523    invalidateHwcGeometry();
524    // here the transaction has been committed
525}
526
527void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
528{
529    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
530    const size_t count = currentLayers.size();
531
532    /*
533     * Traversal of the children
534     * (perform the transaction for each of them if needed)
535     */
536
537    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
538    if (layersNeedTransaction) {
539        for (size_t i=0 ; i<count ; i++) {
540            const sp<LayerBase>& layer = currentLayers[i];
541            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
542            if (!trFlags) continue;
543
544            const uint32_t flags = layer->doTransaction(0);
545            if (flags & Layer::eVisibleRegion)
546                mVisibleRegionsDirty = true;
547        }
548    }
549
550    /*
551     * Perform our own transaction if needed
552     */
553
554    if (transactionFlags & eTransactionNeeded) {
555        if (mCurrentState.orientation != mDrawingState.orientation) {
556            // the orientation has changed, recompute all visible regions
557            // and invalidate everything.
558
559            const int dpy = 0;
560            const int orientation = mCurrentState.orientation;
561            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
562            GraphicPlane& plane(graphicPlane(dpy));
563            plane.setOrientation(orientation);
564
565            // update the shared control block
566            const DisplayHardware& hw(plane.displayHardware());
567            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
568            dcblk->orientation = orientation;
569            dcblk->w = plane.getWidth();
570            dcblk->h = plane.getHeight();
571
572            mVisibleRegionsDirty = true;
573            mDirtyRegion.set(hw.bounds());
574        }
575
576        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
577            // layers have been added
578            mVisibleRegionsDirty = true;
579        }
580
581        // some layers might have been removed, so
582        // we need to update the regions they're exposing.
583        if (mLayersRemoved) {
584            mLayersRemoved = false;
585            mVisibleRegionsDirty = true;
586            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
587            const size_t count = previousLayers.size();
588            for (size_t i=0 ; i<count ; i++) {
589                const sp<LayerBase>& layer(previousLayers[i]);
590                if (currentLayers.indexOf( layer ) < 0) {
591                    // this layer is not visible anymore
592                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
593                }
594            }
595        }
596    }
597
598    commitTransaction();
599}
600
601void SurfaceFlinger::computeVisibleRegions(
602    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
603{
604    const GraphicPlane& plane(graphicPlane(0));
605    const Transform& planeTransform(plane.transform());
606    const DisplayHardware& hw(plane.displayHardware());
607    const Region screenRegion(hw.bounds());
608
609    Region aboveOpaqueLayers;
610    Region aboveCoveredLayers;
611    Region dirty;
612
613    bool secureFrameBuffer = false;
614
615    size_t i = currentLayers.size();
616    while (i--) {
617        const sp<LayerBase>& layer = currentLayers[i];
618        layer->validateVisibility(planeTransform);
619
620        // start with the whole surface at its current location
621        const Layer::State& s(layer->drawingState());
622
623        /*
624         * opaqueRegion: area of a surface that is fully opaque.
625         */
626        Region opaqueRegion;
627
628        /*
629         * visibleRegion: area of a surface that is visible on screen
630         * and not fully transparent. This is essentially the layer's
631         * footprint minus the opaque regions above it.
632         * Areas covered by a translucent surface are considered visible.
633         */
634        Region visibleRegion;
635
636        /*
637         * coveredRegion: area of a surface that is covered by all
638         * visible regions above it (which includes the translucent areas).
639         */
640        Region coveredRegion;
641
642
643        // handle hidden surfaces by setting the visible region to empty
644        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
645            const bool translucent = !layer->isOpaque();
646            const Rect bounds(layer->visibleBounds());
647            visibleRegion.set(bounds);
648            visibleRegion.andSelf(screenRegion);
649            if (!visibleRegion.isEmpty()) {
650                // Remove the transparent area from the visible region
651                if (translucent) {
652                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
653                }
654
655                // compute the opaque region
656                const int32_t layerOrientation = layer->getOrientation();
657                if (s.alpha==255 && !translucent &&
658                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
659                    // the opaque region is the layer's footprint
660                    opaqueRegion = visibleRegion;
661                }
662            }
663        }
664
665        // Clip the covered region to the visible region
666        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
667
668        // Update aboveCoveredLayers for next (lower) layer
669        aboveCoveredLayers.orSelf(visibleRegion);
670
671        // subtract the opaque region covered by the layers above us
672        visibleRegion.subtractSelf(aboveOpaqueLayers);
673
674        // compute this layer's dirty region
675        if (layer->contentDirty) {
676            // we need to invalidate the whole region
677            dirty = visibleRegion;
678            // as well, as the old visible region
679            dirty.orSelf(layer->visibleRegionScreen);
680            layer->contentDirty = false;
681        } else {
682            /* compute the exposed region:
683             *   the exposed region consists of two components:
684             *   1) what's VISIBLE now and was COVERED before
685             *   2) what's EXPOSED now less what was EXPOSED before
686             *
687             * note that (1) is conservative, we start with the whole
688             * visible region but only keep what used to be covered by
689             * something -- which mean it may have been exposed.
690             *
691             * (2) handles areas that were not covered by anything but got
692             * exposed because of a resize.
693             */
694            const Region newExposed = visibleRegion - coveredRegion;
695            const Region oldVisibleRegion = layer->visibleRegionScreen;
696            const Region oldCoveredRegion = layer->coveredRegionScreen;
697            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
698            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
699        }
700        dirty.subtractSelf(aboveOpaqueLayers);
701
702        // accumulate to the screen dirty region
703        dirtyRegion.orSelf(dirty);
704
705        // Update aboveOpaqueLayers for next (lower) layer
706        aboveOpaqueLayers.orSelf(opaqueRegion);
707
708        // Store the visible region is screen space
709        layer->setVisibleRegion(visibleRegion);
710        layer->setCoveredRegion(coveredRegion);
711
712        // If a secure layer is partially visible, lock-down the screen!
713        if (layer->isSecure() && !visibleRegion.isEmpty()) {
714            secureFrameBuffer = true;
715        }
716    }
717
718    // invalidate the areas where a layer was removed
719    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
720    mDirtyRegionRemovedLayer.clear();
721
722    mSecureFrameBuffer = secureFrameBuffer;
723    opaqueRegion = aboveOpaqueLayers;
724}
725
726
727void SurfaceFlinger::commitTransaction()
728{
729    if (!mLayersPendingRemoval.isEmpty()) {
730        // Notify removed layers now that they can't be drawn from
731        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
732            mLayersPendingRemoval[i]->onRemoved();
733        }
734        mLayersPendingRemoval.clear();
735    }
736
737    mDrawingState = mCurrentState;
738    mTransationPending = false;
739    mTransactionCV.broadcast();
740}
741
742void SurfaceFlinger::handlePageFlip()
743{
744    ATRACE_CALL();
745    const DisplayHardware& hw = graphicPlane(0).displayHardware();
746    const Region screenRegion(hw.bounds());
747
748    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
749    const bool visibleRegions = lockPageFlip(currentLayers);
750
751        if (visibleRegions || mVisibleRegionsDirty) {
752            Region opaqueRegion;
753            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
754
755            /*
756             *  rebuild the visible layer list
757             */
758            const size_t count = currentLayers.size();
759            mVisibleLayersSortedByZ.clear();
760            mVisibleLayersSortedByZ.setCapacity(count);
761            for (size_t i=0 ; i<count ; i++) {
762                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
763                    mVisibleLayersSortedByZ.add(currentLayers[i]);
764            }
765
766            mWormholeRegion = screenRegion.subtract(opaqueRegion);
767            mVisibleRegionsDirty = false;
768            invalidateHwcGeometry();
769        }
770
771    unlockPageFlip(currentLayers);
772
773    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
774    mDirtyRegion.andSelf(screenRegion);
775}
776
777void SurfaceFlinger::invalidateHwcGeometry()
778{
779    mHwWorkListDirty = true;
780}
781
782bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
783{
784    bool recomputeVisibleRegions = false;
785    size_t count = currentLayers.size();
786    sp<LayerBase> const* layers = currentLayers.array();
787    for (size_t i=0 ; i<count ; i++) {
788        const sp<LayerBase>& layer(layers[i]);
789        layer->lockPageFlip(recomputeVisibleRegions);
790    }
791    return recomputeVisibleRegions;
792}
793
794void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
795{
796    const GraphicPlane& plane(graphicPlane(0));
797    const Transform& planeTransform(plane.transform());
798    const size_t count = currentLayers.size();
799    sp<LayerBase> const* layers = currentLayers.array();
800    for (size_t i=0 ; i<count ; i++) {
801        const sp<LayerBase>& layer(layers[i]);
802        layer->unlockPageFlip(planeTransform, mDirtyRegion);
803    }
804}
805
806void SurfaceFlinger::handleRefresh()
807{
808    bool needInvalidate = false;
809    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
810    const size_t count = currentLayers.size();
811    for (size_t i=0 ; i<count ; i++) {
812        const sp<LayerBase>& layer(currentLayers[i]);
813        if (layer->onPreComposition()) {
814            needInvalidate = true;
815        }
816    }
817    if (needInvalidate) {
818        signalLayerUpdate();
819    }
820}
821
822
823void SurfaceFlinger::handleWorkList()
824{
825    mHwWorkListDirty = false;
826    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
827    if (hwc.initCheck() == NO_ERROR) {
828        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
829        const size_t count = currentLayers.size();
830        hwc.createWorkList(count);
831        hwc_layer_t* const cur(hwc.getLayers());
832        for (size_t i=0 ; cur && i<count ; i++) {
833            currentLayers[i]->setGeometry(&cur[i]);
834            if (mDebugDisableHWC || mDebugRegion) {
835                cur[i].compositionType = HWC_FRAMEBUFFER;
836                cur[i].flags |= HWC_SKIP_LAYER;
837            }
838        }
839    }
840}
841
842void SurfaceFlinger::handleRepaint()
843{
844    // compute the invalid region
845    mSwapRegion.orSelf(mDirtyRegion);
846
847    if (CC_UNLIKELY(mDebugRegion)) {
848        debugFlashRegions();
849    }
850
851    // set the frame buffer
852    const DisplayHardware& hw(graphicPlane(0).displayHardware());
853    glMatrixMode(GL_MODELVIEW);
854    glLoadIdentity();
855
856    uint32_t flags = hw.getFlags();
857    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
858        (flags & DisplayHardware::BUFFER_PRESERVED))
859    {
860        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
861        // takes a rectangle, we must make sure to update that whole
862        // rectangle in that case
863        if (flags & DisplayHardware::SWAP_RECTANGLE) {
864            // TODO: we really should be able to pass a region to
865            // SWAP_RECTANGLE so that we don't have to redraw all this.
866            mDirtyRegion.set(mSwapRegion.bounds());
867        } else {
868            // in the BUFFER_PRESERVED case, obviously, we can update only
869            // what's needed and nothing more.
870            // NOTE: this is NOT a common case, as preserving the backbuffer
871            // is costly and usually involves copying the whole update back.
872        }
873    } else {
874        if (flags & DisplayHardware::PARTIAL_UPDATES) {
875            // We need to redraw the rectangle that will be updated
876            // (pushed to the framebuffer).
877            // This is needed because PARTIAL_UPDATES only takes one
878            // rectangle instead of a region (see DisplayHardware::flip())
879            mDirtyRegion.set(mSwapRegion.bounds());
880        } else {
881            // we need to redraw everything (the whole screen)
882            mDirtyRegion.set(hw.bounds());
883            mSwapRegion = mDirtyRegion;
884        }
885    }
886
887    setupHardwareComposer(mDirtyRegion);
888    composeSurfaces(mDirtyRegion);
889
890    // update the swap region and clear the dirty region
891    mSwapRegion.orSelf(mDirtyRegion);
892    mDirtyRegion.clear();
893}
894
895void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
896{
897    const DisplayHardware& hw(graphicPlane(0).displayHardware());
898    HWComposer& hwc(hw.getHwComposer());
899    hwc_layer_t* const cur(hwc.getLayers());
900    if (!cur) {
901        return;
902    }
903
904    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
905    size_t count = layers.size();
906
907    ALOGE_IF(hwc.getNumLayers() != count,
908            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
909            hwc.getNumLayers(), count);
910
911    // just to be extra-safe, use the smallest count
912    if (hwc.initCheck() == NO_ERROR) {
913        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
914    }
915
916    /*
917     *  update the per-frame h/w composer data for each layer
918     *  and build the transparent region of the FB
919     */
920    for (size_t i=0 ; i<count ; i++) {
921        const sp<LayerBase>& layer(layers[i]);
922        layer->setPerFrameData(&cur[i]);
923    }
924    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
925    status_t err = hwc.prepare();
926    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
927
928    if (err == NO_ERROR) {
929        // what's happening here is tricky.
930        // we want to clear all the layers with the CLEAR_FB flags
931        // that are opaque.
932        // however, since some GPU are efficient at preserving
933        // the backbuffer, we want to take advantage of that so we do the
934        // clear only in the dirty region (other areas will be preserved
935        // on those GPUs).
936        //   NOTE: on non backbuffer preserving GPU, the dirty region
937        //   has already been expanded as needed, so the code is correct
938        //   there too.
939        //
940        // However, the content of the framebuffer cannot be trusted when
941        // we switch to/from FB/OVERLAY, in which case we need to
942        // expand the dirty region to those areas too.
943        //
944        // Note also that there is a special case when switching from
945        // "no layers in FB" to "some layers in FB", where we need to redraw
946        // the entire FB, since some areas might contain uninitialized
947        // data.
948        //
949        // Also we want to make sure to not clear areas that belong to
950        // layers above that won't redraw (we would just be erasing them),
951        // that is, we can't erase anything outside the dirty region.
952
953        Region transparent;
954
955        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
956            transparent.set(hw.getBounds());
957            dirtyInOut = transparent;
958        } else {
959            for (size_t i=0 ; i<count ; i++) {
960                const sp<LayerBase>& layer(layers[i]);
961                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
962                    transparent.orSelf(layer->visibleRegionScreen);
963                }
964                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
965                if (isOverlay != layer->isOverlay()) {
966                    // we transitioned to/from overlay, so add this layer
967                    // to the dirty region so the framebuffer can be either
968                    // cleared or redrawn.
969                    dirtyInOut.orSelf(layer->visibleRegionScreen);
970                }
971                layer->setOverlay(isOverlay);
972            }
973            // don't erase stuff outside the dirty region
974            transparent.andSelf(dirtyInOut);
975        }
976
977        /*
978         *  clear the area of the FB that need to be transparent
979         */
980        if (!transparent.isEmpty()) {
981            glClearColor(0,0,0,0);
982            Region::const_iterator it = transparent.begin();
983            Region::const_iterator const end = transparent.end();
984            const int32_t height = hw.getHeight();
985            while (it != end) {
986                const Rect& r(*it++);
987                const GLint sy = height - (r.top + r.height());
988                glScissor(r.left, sy, r.width(), r.height());
989                glClear(GL_COLOR_BUFFER_BIT);
990            }
991        }
992    }
993}
994
995void SurfaceFlinger::composeSurfaces(const Region& dirty)
996{
997    const DisplayHardware& hw(graphicPlane(0).displayHardware());
998    HWComposer& hwc(hw.getHwComposer());
999
1000    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
1001    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
1002        // should never happen unless the window manager has a bug
1003        // draw something...
1004        drawWormhole();
1005    }
1006
1007    // FIXME: workaroud for b/6020860
1008    glEnable(GL_SCISSOR_TEST);
1009    glScissor(0,0,0,0);
1010    glClear(GL_COLOR_BUFFER_BIT);
1011    // end-workaround
1012
1013    /*
1014     * and then, render the layers targeted at the framebuffer
1015     */
1016    hwc_layer_t* const cur(hwc.getLayers());
1017    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1018    size_t count = layers.size();
1019    for (size_t i=0 ; i<count ; i++) {
1020        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1021            continue;
1022        }
1023        const sp<LayerBase>& layer(layers[i]);
1024        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1025        if (!clip.isEmpty()) {
1026            layer->draw(clip);
1027        }
1028    }
1029}
1030
1031void SurfaceFlinger::debugFlashRegions()
1032{
1033    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1034    const uint32_t flags = hw.getFlags();
1035    const int32_t height = hw.getHeight();
1036    if (mSwapRegion.isEmpty()) {
1037        return;
1038    }
1039
1040    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1041            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1042        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1043                mDirtyRegion.bounds() : hw.bounds());
1044        composeSurfaces(repaint);
1045    }
1046
1047    glDisable(GL_TEXTURE_EXTERNAL_OES);
1048    glDisable(GL_TEXTURE_2D);
1049    glDisable(GL_BLEND);
1050    glDisable(GL_SCISSOR_TEST);
1051
1052    static int toggle = 0;
1053    toggle = 1 - toggle;
1054    if (toggle) {
1055        glColor4f(1, 0, 1, 1);
1056    } else {
1057        glColor4f(1, 1, 0, 1);
1058    }
1059
1060    Region::const_iterator it = mDirtyRegion.begin();
1061    Region::const_iterator const end = mDirtyRegion.end();
1062    while (it != end) {
1063        const Rect& r = *it++;
1064        GLfloat vertices[][2] = {
1065                { r.left,  height - r.top },
1066                { r.left,  height - r.bottom },
1067                { r.right, height - r.bottom },
1068                { r.right, height - r.top }
1069        };
1070        glVertexPointer(2, GL_FLOAT, 0, vertices);
1071        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1072    }
1073
1074    hw.flip(mSwapRegion);
1075
1076    if (mDebugRegion > 1)
1077        usleep(mDebugRegion * 1000);
1078
1079    glEnable(GL_SCISSOR_TEST);
1080}
1081
1082void SurfaceFlinger::drawWormhole() const
1083{
1084    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1085    if (region.isEmpty())
1086        return;
1087
1088    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1089    const int32_t width = hw.getWidth();
1090    const int32_t height = hw.getHeight();
1091
1092    if (CC_LIKELY(!mDebugBackground)) {
1093        glClearColor(0,0,0,0);
1094        Region::const_iterator it = region.begin();
1095        Region::const_iterator const end = region.end();
1096        while (it != end) {
1097            const Rect& r = *it++;
1098            const GLint sy = height - (r.top + r.height());
1099            glScissor(r.left, sy, r.width(), r.height());
1100            glClear(GL_COLOR_BUFFER_BIT);
1101        }
1102    } else {
1103        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1104                { width, height }, { 0, height }  };
1105        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1106
1107        glVertexPointer(2, GL_SHORT, 0, vertices);
1108        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1109        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1110
1111        glDisable(GL_TEXTURE_EXTERNAL_OES);
1112        glEnable(GL_TEXTURE_2D);
1113        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1114        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1115        glMatrixMode(GL_TEXTURE);
1116        glLoadIdentity();
1117
1118        glDisable(GL_BLEND);
1119
1120        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1121        Region::const_iterator it = region.begin();
1122        Region::const_iterator const end = region.end();
1123        while (it != end) {
1124            const Rect& r = *it++;
1125            const GLint sy = height - (r.top + r.height());
1126            glScissor(r.left, sy, r.width(), r.height());
1127            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1128        }
1129        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1130        glDisable(GL_TEXTURE_2D);
1131        glLoadIdentity();
1132        glMatrixMode(GL_MODELVIEW);
1133    }
1134}
1135
1136status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1137{
1138    Mutex::Autolock _l(mStateLock);
1139    addLayer_l(layer);
1140    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1141    return NO_ERROR;
1142}
1143
1144status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1145{
1146    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1147    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1148}
1149
1150ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1151        const sp<LayerBaseClient>& lbc)
1152{
1153    // attach this layer to the client
1154    size_t name = client->attachLayer(lbc);
1155
1156    Mutex::Autolock _l(mStateLock);
1157
1158    // add this layer to the current state list
1159    addLayer_l(lbc);
1160
1161    return ssize_t(name);
1162}
1163
1164status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1165{
1166    Mutex::Autolock _l(mStateLock);
1167    status_t err = purgatorizeLayer_l(layer);
1168    if (err == NO_ERROR)
1169        setTransactionFlags(eTransactionNeeded);
1170    return err;
1171}
1172
1173status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1174{
1175    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1176    if (lbc != 0) {
1177        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1178    }
1179    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1180    if (index >= 0) {
1181        mLayersRemoved = true;
1182        return NO_ERROR;
1183    }
1184    return status_t(index);
1185}
1186
1187status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1188{
1189    // First add the layer to the purgatory list, which makes sure it won't
1190    // go away, then remove it from the main list (through a transaction).
1191    ssize_t err = removeLayer_l(layerBase);
1192    if (err >= 0) {
1193        mLayerPurgatory.add(layerBase);
1194    }
1195
1196    mLayersPendingRemoval.push(layerBase);
1197
1198    // it's possible that we don't find a layer, because it might
1199    // have been destroyed already -- this is not technically an error
1200    // from the user because there is a race between Client::destroySurface(),
1201    // ~Client() and ~ISurface().
1202    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1203}
1204
1205status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1206{
1207    layer->forceVisibilityTransaction();
1208    setTransactionFlags(eTraversalNeeded);
1209    return NO_ERROR;
1210}
1211
1212uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1213{
1214    return android_atomic_release_load(&mTransactionFlags);
1215}
1216
1217uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1218{
1219    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1220}
1221
1222uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1223{
1224    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1225    if ((old & flags)==0) { // wake the server up
1226        signalTransaction();
1227    }
1228    return old;
1229}
1230
1231
1232void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1233        int orientation, uint32_t flags) {
1234    Mutex::Autolock _l(mStateLock);
1235
1236    uint32_t transactionFlags = 0;
1237    if (mCurrentState.orientation != orientation) {
1238        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1239            mCurrentState.orientation = orientation;
1240            transactionFlags |= eTransactionNeeded;
1241        } else if (orientation != eOrientationUnchanged) {
1242            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1243                    orientation);
1244        }
1245    }
1246
1247    const size_t count = state.size();
1248    for (size_t i=0 ; i<count ; i++) {
1249        const ComposerState& s(state[i]);
1250        sp<Client> client( static_cast<Client *>(s.client.get()) );
1251        transactionFlags |= setClientStateLocked(client, s.state);
1252    }
1253
1254    if (transactionFlags) {
1255        // this triggers the transaction
1256        setTransactionFlags(transactionFlags);
1257
1258        // if this is a synchronous transaction, wait for it to take effect
1259        // before returning.
1260        if (flags & eSynchronous) {
1261            mTransationPending = true;
1262        }
1263        while (mTransationPending) {
1264            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1265            if (CC_UNLIKELY(err != NO_ERROR)) {
1266                // just in case something goes wrong in SF, return to the
1267                // called after a few seconds.
1268                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1269                mTransationPending = false;
1270                break;
1271            }
1272        }
1273    }
1274}
1275
1276sp<ISurface> SurfaceFlinger::createSurface(
1277        ISurfaceComposerClient::surface_data_t* params,
1278        const String8& name,
1279        const sp<Client>& client,
1280        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1281        uint32_t flags)
1282{
1283    sp<LayerBaseClient> layer;
1284    sp<ISurface> surfaceHandle;
1285
1286    if (int32_t(w|h) < 0) {
1287        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1288                int(w), int(h));
1289        return surfaceHandle;
1290    }
1291
1292    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1293    sp<Layer> normalLayer;
1294    switch (flags & eFXSurfaceMask) {
1295        case eFXSurfaceNormal:
1296            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1297            layer = normalLayer;
1298            break;
1299        case eFXSurfaceBlur:
1300            // for now we treat Blur as Dim, until we can implement it
1301            // efficiently.
1302        case eFXSurfaceDim:
1303            layer = createDimSurface(client, d, w, h, flags);
1304            break;
1305        case eFXSurfaceScreenshot:
1306            layer = createScreenshotSurface(client, d, w, h, flags);
1307            break;
1308    }
1309
1310    if (layer != 0) {
1311        layer->initStates(w, h, flags);
1312        layer->setName(name);
1313        ssize_t token = addClientLayer(client, layer);
1314
1315        surfaceHandle = layer->getSurface();
1316        if (surfaceHandle != 0) {
1317            params->token = token;
1318            params->identity = layer->getIdentity();
1319            if (normalLayer != 0) {
1320                Mutex::Autolock _l(mStateLock);
1321                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1322            }
1323        }
1324
1325        setTransactionFlags(eTransactionNeeded);
1326    }
1327
1328    return surfaceHandle;
1329}
1330
1331sp<Layer> SurfaceFlinger::createNormalSurface(
1332        const sp<Client>& client, DisplayID display,
1333        uint32_t w, uint32_t h, uint32_t flags,
1334        PixelFormat& format)
1335{
1336    // initialize the surfaces
1337    switch (format) { // TODO: take h/w into account
1338    case PIXEL_FORMAT_TRANSPARENT:
1339    case PIXEL_FORMAT_TRANSLUCENT:
1340        format = PIXEL_FORMAT_RGBA_8888;
1341        break;
1342    case PIXEL_FORMAT_OPAQUE:
1343#ifdef NO_RGBX_8888
1344        format = PIXEL_FORMAT_RGB_565;
1345#else
1346        format = PIXEL_FORMAT_RGBX_8888;
1347#endif
1348        break;
1349    }
1350
1351#ifdef NO_RGBX_8888
1352    if (format == PIXEL_FORMAT_RGBX_8888)
1353        format = PIXEL_FORMAT_RGBA_8888;
1354#endif
1355
1356    sp<Layer> layer = new Layer(this, display, client);
1357    status_t err = layer->setBuffers(w, h, format, flags);
1358    if (CC_LIKELY(err != NO_ERROR)) {
1359        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1360        layer.clear();
1361    }
1362    return layer;
1363}
1364
1365sp<LayerDim> SurfaceFlinger::createDimSurface(
1366        const sp<Client>& client, DisplayID display,
1367        uint32_t w, uint32_t h, uint32_t flags)
1368{
1369    sp<LayerDim> layer = new LayerDim(this, display, client);
1370    return layer;
1371}
1372
1373sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1374        const sp<Client>& client, DisplayID display,
1375        uint32_t w, uint32_t h, uint32_t flags)
1376{
1377    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1378    return layer;
1379}
1380
1381status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1382{
1383    /*
1384     * called by the window manager, when a surface should be marked for
1385     * destruction.
1386     *
1387     * The surface is removed from the current and drawing lists, but placed
1388     * in the purgatory queue, so it's not destroyed right-away (we need
1389     * to wait for all client's references to go away first).
1390     */
1391
1392    status_t err = NAME_NOT_FOUND;
1393    Mutex::Autolock _l(mStateLock);
1394    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1395    if (layer != 0) {
1396        err = purgatorizeLayer_l(layer);
1397        if (err == NO_ERROR) {
1398            setTransactionFlags(eTransactionNeeded);
1399        }
1400    }
1401    return err;
1402}
1403
1404status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1405{
1406    // called by ~ISurface() when all references are gone
1407    status_t err = NO_ERROR;
1408    sp<LayerBaseClient> l(layer.promote());
1409    if (l != NULL) {
1410        Mutex::Autolock _l(mStateLock);
1411        err = removeLayer_l(l);
1412        if (err == NAME_NOT_FOUND) {
1413            // The surface wasn't in the current list, which means it was
1414            // removed already, which means it is in the purgatory,
1415            // and need to be removed from there.
1416            ssize_t idx = mLayerPurgatory.remove(l);
1417            ALOGE_IF(idx < 0,
1418                    "layer=%p is not in the purgatory list", l.get());
1419        }
1420        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1421                "error removing layer=%p (%s)", l.get(), strerror(-err));
1422    }
1423    return err;
1424}
1425
1426uint32_t SurfaceFlinger::setClientStateLocked(
1427        const sp<Client>& client,
1428        const layer_state_t& s)
1429{
1430    uint32_t flags = 0;
1431    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1432    if (layer != 0) {
1433        const uint32_t what = s.what;
1434        if (what & ePositionChanged) {
1435            if (layer->setPosition(s.x, s.y))
1436                flags |= eTraversalNeeded;
1437        }
1438        if (what & eLayerChanged) {
1439            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1440            if (layer->setLayer(s.z)) {
1441                mCurrentState.layersSortedByZ.removeAt(idx);
1442                mCurrentState.layersSortedByZ.add(layer);
1443                // we need traversal (state changed)
1444                // AND transaction (list changed)
1445                flags |= eTransactionNeeded|eTraversalNeeded;
1446            }
1447        }
1448        if (what & eSizeChanged) {
1449            if (layer->setSize(s.w, s.h)) {
1450                flags |= eTraversalNeeded;
1451            }
1452        }
1453        if (what & eAlphaChanged) {
1454            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1455                flags |= eTraversalNeeded;
1456        }
1457        if (what & eMatrixChanged) {
1458            if (layer->setMatrix(s.matrix))
1459                flags |= eTraversalNeeded;
1460        }
1461        if (what & eTransparentRegionChanged) {
1462            if (layer->setTransparentRegionHint(s.transparentRegion))
1463                flags |= eTraversalNeeded;
1464        }
1465        if (what & eVisibilityChanged) {
1466            if (layer->setFlags(s.flags, s.mask))
1467                flags |= eTraversalNeeded;
1468        }
1469    }
1470    return flags;
1471}
1472
1473void SurfaceFlinger::screenReleased(int dpy)
1474{
1475    // this may be called by a signal handler, we can't do too much in here
1476    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1477    signalTransaction();
1478}
1479
1480void SurfaceFlinger::screenAcquired(int dpy)
1481{
1482    // this may be called by a signal handler, we can't do too much in here
1483    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1484    signalTransaction();
1485}
1486
1487status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1488{
1489    const size_t SIZE = 4096;
1490    char buffer[SIZE];
1491    String8 result;
1492
1493    if (!PermissionCache::checkCallingPermission(sDump)) {
1494        snprintf(buffer, SIZE, "Permission Denial: "
1495                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1496                IPCThreadState::self()->getCallingPid(),
1497                IPCThreadState::self()->getCallingUid());
1498        result.append(buffer);
1499    } else {
1500        // Try to get the main lock, but don't insist if we can't
1501        // (this would indicate SF is stuck, but we want to be able to
1502        // print something in dumpsys).
1503        int retry = 3;
1504        while (mStateLock.tryLock()<0 && --retry>=0) {
1505            usleep(1000000);
1506        }
1507        const bool locked(retry >= 0);
1508        if (!locked) {
1509            snprintf(buffer, SIZE,
1510                    "SurfaceFlinger appears to be unresponsive, "
1511                    "dumping anyways (no locks held)\n");
1512            result.append(buffer);
1513        }
1514
1515        bool dumpAll = true;
1516        size_t index = 0;
1517        size_t numArgs = args.size();
1518        if (numArgs) {
1519            dumpAll = false;
1520
1521            if ((index < numArgs) &&
1522                    (args[index] == String16("--list"))) {
1523                index++;
1524                listLayersLocked(args, index, result, buffer, SIZE);
1525            }
1526
1527            if ((index < numArgs) &&
1528                    (args[index] == String16("--latency"))) {
1529                index++;
1530                dumpStatsLocked(args, index, result, buffer, SIZE);
1531            }
1532
1533            if ((index < numArgs) &&
1534                    (args[index] == String16("--latency-clear"))) {
1535                index++;
1536                clearStatsLocked(args, index, result, buffer, SIZE);
1537            }
1538        }
1539
1540        if (dumpAll) {
1541            dumpAllLocked(result, buffer, SIZE);
1542        }
1543
1544        if (locked) {
1545            mStateLock.unlock();
1546        }
1547    }
1548    write(fd, result.string(), result.size());
1549    return NO_ERROR;
1550}
1551
1552void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1553        String8& result, char* buffer, size_t SIZE) const
1554{
1555    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1556    const size_t count = currentLayers.size();
1557    for (size_t i=0 ; i<count ; i++) {
1558        const sp<LayerBase>& layer(currentLayers[i]);
1559        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1560        result.append(buffer);
1561    }
1562}
1563
1564void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1565        String8& result, char* buffer, size_t SIZE) const
1566{
1567    String8 name;
1568    if (index < args.size()) {
1569        name = String8(args[index]);
1570        index++;
1571    }
1572
1573    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1574    const size_t count = currentLayers.size();
1575    for (size_t i=0 ; i<count ; i++) {
1576        const sp<LayerBase>& layer(currentLayers[i]);
1577        if (name.isEmpty()) {
1578            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1579            result.append(buffer);
1580        }
1581        if (name.isEmpty() || (name == layer->getName())) {
1582            layer->dumpStats(result, buffer, SIZE);
1583        }
1584    }
1585}
1586
1587void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1588        String8& result, char* buffer, size_t SIZE) const
1589{
1590    String8 name;
1591    if (index < args.size()) {
1592        name = String8(args[index]);
1593        index++;
1594    }
1595
1596    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1597    const size_t count = currentLayers.size();
1598    for (size_t i=0 ; i<count ; i++) {
1599        const sp<LayerBase>& layer(currentLayers[i]);
1600        if (name.isEmpty() || (name == layer->getName())) {
1601            layer->clearStats();
1602        }
1603    }
1604}
1605
1606void SurfaceFlinger::dumpAllLocked(
1607        String8& result, char* buffer, size_t SIZE) const
1608{
1609    // figure out if we're stuck somewhere
1610    const nsecs_t now = systemTime();
1611    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1612    const nsecs_t inTransaction(mDebugInTransaction);
1613    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1614    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1615
1616    /*
1617     * Dump the visible layer list
1618     */
1619    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1620    const size_t count = currentLayers.size();
1621    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1622    result.append(buffer);
1623    for (size_t i=0 ; i<count ; i++) {
1624        const sp<LayerBase>& layer(currentLayers[i]);
1625        layer->dump(result, buffer, SIZE);
1626    }
1627
1628    /*
1629     * Dump the layers in the purgatory
1630     */
1631
1632    const size_t purgatorySize = mLayerPurgatory.size();
1633    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1634    result.append(buffer);
1635    for (size_t i=0 ; i<purgatorySize ; i++) {
1636        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1637        layer->shortDump(result, buffer, SIZE);
1638    }
1639
1640    /*
1641     * Dump SurfaceFlinger global state
1642     */
1643
1644    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1645    result.append(buffer);
1646
1647    const GLExtensions& extensions(GLExtensions::getInstance());
1648    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1649            extensions.getVendor(),
1650            extensions.getRenderer(),
1651            extensions.getVersion());
1652    result.append(buffer);
1653
1654    snprintf(buffer, SIZE, "EGL : %s\n",
1655            eglQueryString(graphicPlane(0).getEGLDisplay(),
1656                    EGL_VERSION_HW_ANDROID));
1657    result.append(buffer);
1658
1659    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1660    result.append(buffer);
1661
1662    mWormholeRegion.dump(result, "WormholeRegion");
1663    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1664    snprintf(buffer, SIZE,
1665            "  orientation=%d, canDraw=%d\n",
1666            mCurrentState.orientation, hw.canDraw());
1667    result.append(buffer);
1668    snprintf(buffer, SIZE,
1669            "  last eglSwapBuffers() time: %f us\n"
1670            "  last transaction time     : %f us\n"
1671            "  transaction-flags         : %08x\n"
1672            "  refresh-rate              : %f fps\n"
1673            "  x-dpi                     : %f\n"
1674            "  y-dpi                     : %f\n",
1675            mLastSwapBufferTime/1000.0,
1676            mLastTransactionTime/1000.0,
1677            mTransactionFlags,
1678            hw.getRefreshRate(),
1679            hw.getDpiX(),
1680            hw.getDpiY());
1681    result.append(buffer);
1682
1683    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1684            inSwapBuffersDuration/1000.0);
1685    result.append(buffer);
1686
1687    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1688            inTransactionDuration/1000.0);
1689    result.append(buffer);
1690
1691    /*
1692     * VSYNC state
1693     */
1694    mEventThread->dump(result, buffer, SIZE);
1695
1696    /*
1697     * Dump HWComposer state
1698     */
1699    HWComposer& hwc(hw.getHwComposer());
1700    snprintf(buffer, SIZE, "h/w composer state:\n");
1701    result.append(buffer);
1702    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1703            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1704                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1705    result.append(buffer);
1706    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1707
1708    /*
1709     * Dump gralloc state
1710     */
1711    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1712    alloc.dump(result);
1713    hw.dump(result);
1714}
1715
1716status_t SurfaceFlinger::onTransact(
1717    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1718{
1719    switch (code) {
1720        case CREATE_CONNECTION:
1721        case SET_TRANSACTION_STATE:
1722        case SET_ORIENTATION:
1723        case BOOT_FINISHED:
1724        case TURN_ELECTRON_BEAM_OFF:
1725        case TURN_ELECTRON_BEAM_ON:
1726        {
1727            // codes that require permission check
1728            IPCThreadState* ipc = IPCThreadState::self();
1729            const int pid = ipc->getCallingPid();
1730            const int uid = ipc->getCallingUid();
1731            if ((uid != AID_GRAPHICS) &&
1732                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1733                ALOGE("Permission Denial: "
1734                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1735                return PERMISSION_DENIED;
1736            }
1737            break;
1738        }
1739        case CAPTURE_SCREEN:
1740        {
1741            // codes that require permission check
1742            IPCThreadState* ipc = IPCThreadState::self();
1743            const int pid = ipc->getCallingPid();
1744            const int uid = ipc->getCallingUid();
1745            if ((uid != AID_GRAPHICS) &&
1746                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1747                ALOGE("Permission Denial: "
1748                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1749                return PERMISSION_DENIED;
1750            }
1751            break;
1752        }
1753    }
1754
1755    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1756    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1757        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1758        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1759            IPCThreadState* ipc = IPCThreadState::self();
1760            const int pid = ipc->getCallingPid();
1761            const int uid = ipc->getCallingUid();
1762            ALOGE("Permission Denial: "
1763                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1764            return PERMISSION_DENIED;
1765        }
1766        int n;
1767        switch (code) {
1768            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1769            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1770                return NO_ERROR;
1771            case 1002:  // SHOW_UPDATES
1772                n = data.readInt32();
1773                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1774                invalidateHwcGeometry();
1775                repaintEverything();
1776                return NO_ERROR;
1777            case 1003:  // SHOW_BACKGROUND
1778                n = data.readInt32();
1779                mDebugBackground = n ? 1 : 0;
1780                return NO_ERROR;
1781            case 1004:{ // repaint everything
1782                repaintEverything();
1783                return NO_ERROR;
1784            }
1785            case 1005:{ // force transaction
1786                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1787                return NO_ERROR;
1788            }
1789            case 1006:{ // send empty update
1790                signalRefresh();
1791                return NO_ERROR;
1792            }
1793            case 1008:  // toggle use of hw composer
1794                n = data.readInt32();
1795                mDebugDisableHWC = n ? 1 : 0;
1796                invalidateHwcGeometry();
1797                repaintEverything();
1798                return NO_ERROR;
1799            case 1009:  // toggle use of transform hint
1800                n = data.readInt32();
1801                mDebugDisableTransformHint = n ? 1 : 0;
1802                invalidateHwcGeometry();
1803                repaintEverything();
1804                return NO_ERROR;
1805            case 1010:  // interrogate.
1806                reply->writeInt32(0);
1807                reply->writeInt32(0);
1808                reply->writeInt32(mDebugRegion);
1809                reply->writeInt32(mDebugBackground);
1810                reply->writeInt32(mDebugDisableHWC);
1811                return NO_ERROR;
1812            case 1013: {
1813                Mutex::Autolock _l(mStateLock);
1814                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1815                reply->writeInt32(hw.getPageFlipCount());
1816            }
1817            return NO_ERROR;
1818        }
1819    }
1820    return err;
1821}
1822
1823void SurfaceFlinger::repaintEverything() {
1824    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1825    const Rect bounds(hw.getBounds());
1826    setInvalidateRegion(Region(bounds));
1827    signalTransaction();
1828}
1829
1830void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1831    Mutex::Autolock _l(mInvalidateLock);
1832    mInvalidateRegion = reg;
1833}
1834
1835Region SurfaceFlinger::getAndClearInvalidateRegion() {
1836    Mutex::Autolock _l(mInvalidateLock);
1837    Region reg(mInvalidateRegion);
1838    mInvalidateRegion.clear();
1839    return reg;
1840}
1841
1842// ---------------------------------------------------------------------------
1843
1844status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1845        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1846{
1847    Mutex::Autolock _l(mStateLock);
1848    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1849}
1850
1851status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1852        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1853{
1854    if (!GLExtensions::getInstance().haveFramebufferObject())
1855        return INVALID_OPERATION;
1856
1857    // get screen geometry
1858    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1859    const uint32_t hw_w = hw.getWidth();
1860    const uint32_t hw_h = hw.getHeight();
1861    GLfloat u = 1;
1862    GLfloat v = 1;
1863
1864    // make sure to clear all GL error flags
1865    while ( glGetError() != GL_NO_ERROR ) ;
1866
1867    // create a FBO
1868    GLuint name, tname;
1869    glGenTextures(1, &tname);
1870    glBindTexture(GL_TEXTURE_2D, tname);
1871    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1872            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1873    if (glGetError() != GL_NO_ERROR) {
1874        while ( glGetError() != GL_NO_ERROR ) ;
1875        GLint tw = (2 << (31 - clz(hw_w)));
1876        GLint th = (2 << (31 - clz(hw_h)));
1877        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1878                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1879        u = GLfloat(hw_w) / tw;
1880        v = GLfloat(hw_h) / th;
1881    }
1882    glGenFramebuffersOES(1, &name);
1883    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1884    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1885            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1886
1887    // redraw the screen entirely...
1888    glDisable(GL_TEXTURE_EXTERNAL_OES);
1889    glDisable(GL_TEXTURE_2D);
1890    glDisable(GL_SCISSOR_TEST);
1891    glClearColor(0,0,0,1);
1892    glClear(GL_COLOR_BUFFER_BIT);
1893    glEnable(GL_SCISSOR_TEST);
1894    glMatrixMode(GL_MODELVIEW);
1895    glLoadIdentity();
1896    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1897    const size_t count = layers.size();
1898    for (size_t i=0 ; i<count ; ++i) {
1899        const sp<LayerBase>& layer(layers[i]);
1900        layer->drawForSreenShot();
1901    }
1902
1903    hw.compositionComplete();
1904
1905    // back to main framebuffer
1906    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1907    glDisable(GL_SCISSOR_TEST);
1908    glDeleteFramebuffersOES(1, &name);
1909
1910    *textureName = tname;
1911    *uOut = u;
1912    *vOut = v;
1913    return NO_ERROR;
1914}
1915
1916// ---------------------------------------------------------------------------
1917
1918status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1919{
1920    // get screen geometry
1921    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1922    const uint32_t hw_w = hw.getWidth();
1923    const uint32_t hw_h = hw.getHeight();
1924    const Region screenBounds(hw.getBounds());
1925
1926    GLfloat u, v;
1927    GLuint tname;
1928    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1929    if (result != NO_ERROR) {
1930        return result;
1931    }
1932
1933    GLfloat vtx[8];
1934    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1935    glBindTexture(GL_TEXTURE_2D, tname);
1936    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1937    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1938    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1939    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1940    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1941    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1942    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1943    glVertexPointer(2, GL_FLOAT, 0, vtx);
1944
1945    /*
1946     * Texture coordinate mapping
1947     *
1948     *                 u
1949     *    1 +----------+---+
1950     *      |     |    |   |  image is inverted
1951     *      |     V    |   |  w.r.t. the texture
1952     *  1-v +----------+   |  coordinates
1953     *      |              |
1954     *      |              |
1955     *      |              |
1956     *    0 +--------------+
1957     *      0              1
1958     *
1959     */
1960
1961    class s_curve_interpolator {
1962        const float nbFrames, s, v;
1963    public:
1964        s_curve_interpolator(int nbFrames, float s)
1965        : nbFrames(1.0f / (nbFrames-1)), s(s),
1966          v(1.0f + expf(-s + 0.5f*s)) {
1967        }
1968        float operator()(int f) {
1969            const float x = f * nbFrames;
1970            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1971        }
1972    };
1973
1974    class v_stretch {
1975        const GLfloat hw_w, hw_h;
1976    public:
1977        v_stretch(uint32_t hw_w, uint32_t hw_h)
1978        : hw_w(hw_w), hw_h(hw_h) {
1979        }
1980        void operator()(GLfloat* vtx, float v) {
1981            const GLfloat w = hw_w + (hw_w * v);
1982            const GLfloat h = hw_h - (hw_h * v);
1983            const GLfloat x = (hw_w - w) * 0.5f;
1984            const GLfloat y = (hw_h - h) * 0.5f;
1985            vtx[0] = x;         vtx[1] = y;
1986            vtx[2] = x;         vtx[3] = y + h;
1987            vtx[4] = x + w;     vtx[5] = y + h;
1988            vtx[6] = x + w;     vtx[7] = y;
1989        }
1990    };
1991
1992    class h_stretch {
1993        const GLfloat hw_w, hw_h;
1994    public:
1995        h_stretch(uint32_t hw_w, uint32_t hw_h)
1996        : hw_w(hw_w), hw_h(hw_h) {
1997        }
1998        void operator()(GLfloat* vtx, float v) {
1999            const GLfloat w = hw_w - (hw_w * v);
2000            const GLfloat h = 1.0f;
2001            const GLfloat x = (hw_w - w) * 0.5f;
2002            const GLfloat y = (hw_h - h) * 0.5f;
2003            vtx[0] = x;         vtx[1] = y;
2004            vtx[2] = x;         vtx[3] = y + h;
2005            vtx[4] = x + w;     vtx[5] = y + h;
2006            vtx[6] = x + w;     vtx[7] = y;
2007        }
2008    };
2009
2010    // the full animation is 24 frames
2011    char value[PROPERTY_VALUE_MAX];
2012    property_get("debug.sf.electron_frames", value, "24");
2013    int nbFrames = (atoi(value) + 1) >> 1;
2014    if (nbFrames <= 0) // just in case
2015        nbFrames = 24;
2016
2017    s_curve_interpolator itr(nbFrames, 7.5f);
2018    s_curve_interpolator itg(nbFrames, 8.0f);
2019    s_curve_interpolator itb(nbFrames, 8.5f);
2020
2021    v_stretch vverts(hw_w, hw_h);
2022
2023    glMatrixMode(GL_TEXTURE);
2024    glLoadIdentity();
2025    glMatrixMode(GL_MODELVIEW);
2026    glLoadIdentity();
2027
2028    glEnable(GL_BLEND);
2029    glBlendFunc(GL_ONE, GL_ONE);
2030    for (int i=0 ; i<nbFrames ; i++) {
2031        float x, y, w, h;
2032        const float vr = itr(i);
2033        const float vg = itg(i);
2034        const float vb = itb(i);
2035
2036        // clear screen
2037        glColorMask(1,1,1,1);
2038        glClear(GL_COLOR_BUFFER_BIT);
2039        glEnable(GL_TEXTURE_2D);
2040
2041        // draw the red plane
2042        vverts(vtx, vr);
2043        glColorMask(1,0,0,1);
2044        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2045
2046        // draw the green plane
2047        vverts(vtx, vg);
2048        glColorMask(0,1,0,1);
2049        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2050
2051        // draw the blue plane
2052        vverts(vtx, vb);
2053        glColorMask(0,0,1,1);
2054        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2055
2056        // draw the white highlight (we use the last vertices)
2057        glDisable(GL_TEXTURE_2D);
2058        glColorMask(1,1,1,1);
2059        glColor4f(vg, vg, vg, 1);
2060        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2061        hw.flip(screenBounds);
2062    }
2063
2064    h_stretch hverts(hw_w, hw_h);
2065    glDisable(GL_BLEND);
2066    glDisable(GL_TEXTURE_2D);
2067    glColorMask(1,1,1,1);
2068    for (int i=0 ; i<nbFrames ; i++) {
2069        const float v = itg(i);
2070        hverts(vtx, v);
2071        glClear(GL_COLOR_BUFFER_BIT);
2072        glColor4f(1-v, 1-v, 1-v, 1);
2073        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2074        hw.flip(screenBounds);
2075    }
2076
2077    glColorMask(1,1,1,1);
2078    glEnable(GL_SCISSOR_TEST);
2079    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2080    glDeleteTextures(1, &tname);
2081    glDisable(GL_TEXTURE_2D);
2082    glDisable(GL_BLEND);
2083    return NO_ERROR;
2084}
2085
2086status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2087{
2088    status_t result = PERMISSION_DENIED;
2089
2090    if (!GLExtensions::getInstance().haveFramebufferObject())
2091        return INVALID_OPERATION;
2092
2093
2094    // get screen geometry
2095    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2096    const uint32_t hw_w = hw.getWidth();
2097    const uint32_t hw_h = hw.getHeight();
2098    const Region screenBounds(hw.bounds());
2099
2100    GLfloat u, v;
2101    GLuint tname;
2102    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2103    if (result != NO_ERROR) {
2104        return result;
2105    }
2106
2107    GLfloat vtx[8];
2108    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2109    glBindTexture(GL_TEXTURE_2D, tname);
2110    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2111    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2112    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2113    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2114    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2115    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2116    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2117    glVertexPointer(2, GL_FLOAT, 0, vtx);
2118
2119    class s_curve_interpolator {
2120        const float nbFrames, s, v;
2121    public:
2122        s_curve_interpolator(int nbFrames, float s)
2123        : nbFrames(1.0f / (nbFrames-1)), s(s),
2124          v(1.0f + expf(-s + 0.5f*s)) {
2125        }
2126        float operator()(int f) {
2127            const float x = f * nbFrames;
2128            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2129        }
2130    };
2131
2132    class v_stretch {
2133        const GLfloat hw_w, hw_h;
2134    public:
2135        v_stretch(uint32_t hw_w, uint32_t hw_h)
2136        : hw_w(hw_w), hw_h(hw_h) {
2137        }
2138        void operator()(GLfloat* vtx, float v) {
2139            const GLfloat w = hw_w + (hw_w * v);
2140            const GLfloat h = hw_h - (hw_h * v);
2141            const GLfloat x = (hw_w - w) * 0.5f;
2142            const GLfloat y = (hw_h - h) * 0.5f;
2143            vtx[0] = x;         vtx[1] = y;
2144            vtx[2] = x;         vtx[3] = y + h;
2145            vtx[4] = x + w;     vtx[5] = y + h;
2146            vtx[6] = x + w;     vtx[7] = y;
2147        }
2148    };
2149
2150    class h_stretch {
2151        const GLfloat hw_w, hw_h;
2152    public:
2153        h_stretch(uint32_t hw_w, uint32_t hw_h)
2154        : hw_w(hw_w), hw_h(hw_h) {
2155        }
2156        void operator()(GLfloat* vtx, float v) {
2157            const GLfloat w = hw_w - (hw_w * v);
2158            const GLfloat h = 1.0f;
2159            const GLfloat x = (hw_w - w) * 0.5f;
2160            const GLfloat y = (hw_h - h) * 0.5f;
2161            vtx[0] = x;         vtx[1] = y;
2162            vtx[2] = x;         vtx[3] = y + h;
2163            vtx[4] = x + w;     vtx[5] = y + h;
2164            vtx[6] = x + w;     vtx[7] = y;
2165        }
2166    };
2167
2168    // the full animation is 12 frames
2169    int nbFrames = 8;
2170    s_curve_interpolator itr(nbFrames, 7.5f);
2171    s_curve_interpolator itg(nbFrames, 8.0f);
2172    s_curve_interpolator itb(nbFrames, 8.5f);
2173
2174    h_stretch hverts(hw_w, hw_h);
2175    glDisable(GL_BLEND);
2176    glDisable(GL_TEXTURE_2D);
2177    glColorMask(1,1,1,1);
2178    for (int i=nbFrames-1 ; i>=0 ; i--) {
2179        const float v = itg(i);
2180        hverts(vtx, v);
2181        glClear(GL_COLOR_BUFFER_BIT);
2182        glColor4f(1-v, 1-v, 1-v, 1);
2183        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2184        hw.flip(screenBounds);
2185    }
2186
2187    nbFrames = 4;
2188    v_stretch vverts(hw_w, hw_h);
2189    glEnable(GL_BLEND);
2190    glBlendFunc(GL_ONE, GL_ONE);
2191    for (int i=nbFrames-1 ; i>=0 ; i--) {
2192        float x, y, w, h;
2193        const float vr = itr(i);
2194        const float vg = itg(i);
2195        const float vb = itb(i);
2196
2197        // clear screen
2198        glColorMask(1,1,1,1);
2199        glClear(GL_COLOR_BUFFER_BIT);
2200        glEnable(GL_TEXTURE_2D);
2201
2202        // draw the red plane
2203        vverts(vtx, vr);
2204        glColorMask(1,0,0,1);
2205        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2206
2207        // draw the green plane
2208        vverts(vtx, vg);
2209        glColorMask(0,1,0,1);
2210        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2211
2212        // draw the blue plane
2213        vverts(vtx, vb);
2214        glColorMask(0,0,1,1);
2215        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2216
2217        hw.flip(screenBounds);
2218    }
2219
2220    glColorMask(1,1,1,1);
2221    glEnable(GL_SCISSOR_TEST);
2222    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2223    glDeleteTextures(1, &tname);
2224    glDisable(GL_TEXTURE_2D);
2225    glDisable(GL_BLEND);
2226
2227    return NO_ERROR;
2228}
2229
2230// ---------------------------------------------------------------------------
2231
2232status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2233{
2234    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2235    if (!hw.canDraw()) {
2236        // we're already off
2237        return NO_ERROR;
2238    }
2239
2240    // turn off hwc while we're doing the animation
2241    hw.getHwComposer().disable();
2242    // and make sure to turn it back on (if needed) next time we compose
2243    invalidateHwcGeometry();
2244
2245    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2246        electronBeamOffAnimationImplLocked();
2247    }
2248
2249    // always clear the whole screen at the end of the animation
2250    glClearColor(0,0,0,1);
2251    glDisable(GL_SCISSOR_TEST);
2252    glClear(GL_COLOR_BUFFER_BIT);
2253    glEnable(GL_SCISSOR_TEST);
2254    hw.flip( Region(hw.bounds()) );
2255
2256    return NO_ERROR;
2257}
2258
2259status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2260{
2261    class MessageTurnElectronBeamOff : public MessageBase {
2262        SurfaceFlinger* flinger;
2263        int32_t mode;
2264        status_t result;
2265    public:
2266        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2267            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2268        }
2269        status_t getResult() const {
2270            return result;
2271        }
2272        virtual bool handler() {
2273            Mutex::Autolock _l(flinger->mStateLock);
2274            result = flinger->turnElectronBeamOffImplLocked(mode);
2275            return true;
2276        }
2277    };
2278
2279    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2280    status_t res = postMessageSync(msg);
2281    if (res == NO_ERROR) {
2282        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2283
2284        // work-around: when the power-manager calls us we activate the
2285        // animation. eventually, the "on" animation will be called
2286        // by the power-manager itself
2287        mElectronBeamAnimationMode = mode;
2288    }
2289    return res;
2290}
2291
2292// ---------------------------------------------------------------------------
2293
2294status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2295{
2296    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2297    if (hw.canDraw()) {
2298        // we're already on
2299        return NO_ERROR;
2300    }
2301    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2302        electronBeamOnAnimationImplLocked();
2303    }
2304
2305    // make sure to redraw the whole screen when the animation is done
2306    mDirtyRegion.set(hw.bounds());
2307    signalTransaction();
2308
2309    return NO_ERROR;
2310}
2311
2312status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2313{
2314    class MessageTurnElectronBeamOn : public MessageBase {
2315        SurfaceFlinger* flinger;
2316        int32_t mode;
2317        status_t result;
2318    public:
2319        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2320            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2321        }
2322        status_t getResult() const {
2323            return result;
2324        }
2325        virtual bool handler() {
2326            Mutex::Autolock _l(flinger->mStateLock);
2327            result = flinger->turnElectronBeamOnImplLocked(mode);
2328            return true;
2329        }
2330    };
2331
2332    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2333    return NO_ERROR;
2334}
2335
2336// ---------------------------------------------------------------------------
2337
2338status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2339        sp<IMemoryHeap>* heap,
2340        uint32_t* w, uint32_t* h, PixelFormat* f,
2341        uint32_t sw, uint32_t sh,
2342        uint32_t minLayerZ, uint32_t maxLayerZ)
2343{
2344    status_t result = PERMISSION_DENIED;
2345
2346    // only one display supported for now
2347    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2348        return BAD_VALUE;
2349
2350    if (!GLExtensions::getInstance().haveFramebufferObject())
2351        return INVALID_OPERATION;
2352
2353    // get screen geometry
2354    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2355    const uint32_t hw_w = hw.getWidth();
2356    const uint32_t hw_h = hw.getHeight();
2357
2358    if ((sw > hw_w) || (sh > hw_h))
2359        return BAD_VALUE;
2360
2361    sw = (!sw) ? hw_w : sw;
2362    sh = (!sh) ? hw_h : sh;
2363    const size_t size = sw * sh * 4;
2364
2365    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2366    //        sw, sh, minLayerZ, maxLayerZ);
2367
2368    // make sure to clear all GL error flags
2369    while ( glGetError() != GL_NO_ERROR ) ;
2370
2371    // create a FBO
2372    GLuint name, tname;
2373    glGenRenderbuffersOES(1, &tname);
2374    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2375    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2376    glGenFramebuffersOES(1, &name);
2377    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2378    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2379            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2380
2381    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2382
2383    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2384
2385        // invert everything, b/c glReadPixel() below will invert the FB
2386        glViewport(0, 0, sw, sh);
2387        glScissor(0, 0, sw, sh);
2388        glEnable(GL_SCISSOR_TEST);
2389        glMatrixMode(GL_PROJECTION);
2390        glPushMatrix();
2391        glLoadIdentity();
2392        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2393        glMatrixMode(GL_MODELVIEW);
2394
2395        // redraw the screen entirely...
2396        glClearColor(0,0,0,1);
2397        glClear(GL_COLOR_BUFFER_BIT);
2398
2399        const LayerVector& layers(mDrawingState.layersSortedByZ);
2400        const size_t count = layers.size();
2401        for (size_t i=0 ; i<count ; ++i) {
2402            const sp<LayerBase>& layer(layers[i]);
2403            const uint32_t flags = layer->drawingState().flags;
2404            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2405                const uint32_t z = layer->drawingState().z;
2406                if (z >= minLayerZ && z <= maxLayerZ) {
2407                    layer->drawForSreenShot();
2408                }
2409            }
2410        }
2411
2412        // XXX: this is needed on tegra
2413        glEnable(GL_SCISSOR_TEST);
2414        glScissor(0, 0, sw, sh);
2415
2416        // check for errors and return screen capture
2417        if (glGetError() != GL_NO_ERROR) {
2418            // error while rendering
2419            result = INVALID_OPERATION;
2420        } else {
2421            // allocate shared memory large enough to hold the
2422            // screen capture
2423            sp<MemoryHeapBase> base(
2424                    new MemoryHeapBase(size, 0, "screen-capture") );
2425            void* const ptr = base->getBase();
2426            if (ptr) {
2427                // capture the screen with glReadPixels()
2428                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2429                if (glGetError() == GL_NO_ERROR) {
2430                    *heap = base;
2431                    *w = sw;
2432                    *h = sh;
2433                    *f = PIXEL_FORMAT_RGBA_8888;
2434                    result = NO_ERROR;
2435                }
2436            } else {
2437                result = NO_MEMORY;
2438            }
2439        }
2440        glEnable(GL_SCISSOR_TEST);
2441        glViewport(0, 0, hw_w, hw_h);
2442        glMatrixMode(GL_PROJECTION);
2443        glPopMatrix();
2444        glMatrixMode(GL_MODELVIEW);
2445    } else {
2446        result = BAD_VALUE;
2447    }
2448
2449    // release FBO resources
2450    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2451    glDeleteRenderbuffersOES(1, &tname);
2452    glDeleteFramebuffersOES(1, &name);
2453
2454    hw.compositionComplete();
2455
2456    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2457
2458    return result;
2459}
2460
2461
2462status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2463        sp<IMemoryHeap>* heap,
2464        uint32_t* width, uint32_t* height, PixelFormat* format,
2465        uint32_t sw, uint32_t sh,
2466        uint32_t minLayerZ, uint32_t maxLayerZ)
2467{
2468    // only one display supported for now
2469    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2470        return BAD_VALUE;
2471
2472    if (!GLExtensions::getInstance().haveFramebufferObject())
2473        return INVALID_OPERATION;
2474
2475    class MessageCaptureScreen : public MessageBase {
2476        SurfaceFlinger* flinger;
2477        DisplayID dpy;
2478        sp<IMemoryHeap>* heap;
2479        uint32_t* w;
2480        uint32_t* h;
2481        PixelFormat* f;
2482        uint32_t sw;
2483        uint32_t sh;
2484        uint32_t minLayerZ;
2485        uint32_t maxLayerZ;
2486        status_t result;
2487    public:
2488        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2489                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2490                uint32_t sw, uint32_t sh,
2491                uint32_t minLayerZ, uint32_t maxLayerZ)
2492            : flinger(flinger), dpy(dpy),
2493              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2494              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2495              result(PERMISSION_DENIED)
2496        {
2497        }
2498        status_t getResult() const {
2499            return result;
2500        }
2501        virtual bool handler() {
2502            Mutex::Autolock _l(flinger->mStateLock);
2503
2504            // if we have secure windows, never allow the screen capture
2505            if (flinger->mSecureFrameBuffer)
2506                return true;
2507
2508            result = flinger->captureScreenImplLocked(dpy,
2509                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2510
2511            return true;
2512        }
2513    };
2514
2515    sp<MessageBase> msg = new MessageCaptureScreen(this,
2516            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2517    status_t res = postMessageSync(msg);
2518    if (res == NO_ERROR) {
2519        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2520    }
2521    return res;
2522}
2523
2524// ---------------------------------------------------------------------------
2525
2526sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2527{
2528    sp<Layer> result;
2529    Mutex::Autolock _l(mStateLock);
2530    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2531    return result;
2532}
2533
2534// ---------------------------------------------------------------------------
2535
2536Client::Client(const sp<SurfaceFlinger>& flinger)
2537    : mFlinger(flinger), mNameGenerator(1)
2538{
2539}
2540
2541Client::~Client()
2542{
2543    const size_t count = mLayers.size();
2544    for (size_t i=0 ; i<count ; i++) {
2545        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2546        if (layer != 0) {
2547            mFlinger->removeLayer(layer);
2548        }
2549    }
2550}
2551
2552status_t Client::initCheck() const {
2553    return NO_ERROR;
2554}
2555
2556size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2557{
2558    Mutex::Autolock _l(mLock);
2559    size_t name = mNameGenerator++;
2560    mLayers.add(name, layer);
2561    return name;
2562}
2563
2564void Client::detachLayer(const LayerBaseClient* layer)
2565{
2566    Mutex::Autolock _l(mLock);
2567    // we do a linear search here, because this doesn't happen often
2568    const size_t count = mLayers.size();
2569    for (size_t i=0 ; i<count ; i++) {
2570        if (mLayers.valueAt(i) == layer) {
2571            mLayers.removeItemsAt(i, 1);
2572            break;
2573        }
2574    }
2575}
2576sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2577{
2578    Mutex::Autolock _l(mLock);
2579    sp<LayerBaseClient> lbc;
2580    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2581    if (layer != 0) {
2582        lbc = layer.promote();
2583        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2584    }
2585    return lbc;
2586}
2587
2588
2589status_t Client::onTransact(
2590    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2591{
2592    // these must be checked
2593     IPCThreadState* ipc = IPCThreadState::self();
2594     const int pid = ipc->getCallingPid();
2595     const int uid = ipc->getCallingUid();
2596     const int self_pid = getpid();
2597     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2598         // we're called from a different process, do the real check
2599         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2600         {
2601             ALOGE("Permission Denial: "
2602                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2603             return PERMISSION_DENIED;
2604         }
2605     }
2606     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2607}
2608
2609
2610sp<ISurface> Client::createSurface(
2611        ISurfaceComposerClient::surface_data_t* params,
2612        const String8& name,
2613        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2614        uint32_t flags)
2615{
2616    /*
2617     * createSurface must be called from the GL thread so that it can
2618     * have access to the GL context.
2619     */
2620
2621    class MessageCreateSurface : public MessageBase {
2622        sp<ISurface> result;
2623        SurfaceFlinger* flinger;
2624        ISurfaceComposerClient::surface_data_t* params;
2625        Client* client;
2626        const String8& name;
2627        DisplayID display;
2628        uint32_t w, h;
2629        PixelFormat format;
2630        uint32_t flags;
2631    public:
2632        MessageCreateSurface(SurfaceFlinger* flinger,
2633                ISurfaceComposerClient::surface_data_t* params,
2634                const String8& name, Client* client,
2635                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2636                uint32_t flags)
2637            : flinger(flinger), params(params), client(client), name(name),
2638              display(display), w(w), h(h), format(format), flags(flags)
2639        {
2640        }
2641        sp<ISurface> getResult() const { return result; }
2642        virtual bool handler() {
2643            result = flinger->createSurface(params, name, client,
2644                    display, w, h, format, flags);
2645            return true;
2646        }
2647    };
2648
2649    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2650            params, name, this, display, w, h, format, flags);
2651    mFlinger->postMessageSync(msg);
2652    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2653}
2654status_t Client::destroySurface(SurfaceID sid) {
2655    return mFlinger->removeSurface(this, sid);
2656}
2657
2658// ---------------------------------------------------------------------------
2659
2660GraphicBufferAlloc::GraphicBufferAlloc() {}
2661
2662GraphicBufferAlloc::~GraphicBufferAlloc() {}
2663
2664sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2665        PixelFormat format, uint32_t usage, status_t* error) {
2666    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2667    status_t err = graphicBuffer->initCheck();
2668    *error = err;
2669    if (err != 0 || graphicBuffer->handle == 0) {
2670        if (err == NO_MEMORY) {
2671            GraphicBuffer::dumpAllocationsToSystemLog();
2672        }
2673        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2674             "failed (%s), handle=%p",
2675                w, h, strerror(-err), graphicBuffer->handle);
2676        return 0;
2677    }
2678    return graphicBuffer;
2679}
2680
2681// ---------------------------------------------------------------------------
2682
2683GraphicPlane::GraphicPlane()
2684    : mHw(0)
2685{
2686}
2687
2688GraphicPlane::~GraphicPlane() {
2689    delete mHw;
2690}
2691
2692bool GraphicPlane::initialized() const {
2693    return mHw ? true : false;
2694}
2695
2696int GraphicPlane::getWidth() const {
2697    return mWidth;
2698}
2699
2700int GraphicPlane::getHeight() const {
2701    return mHeight;
2702}
2703
2704void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2705{
2706    mHw = hw;
2707
2708    // initialize the display orientation transform.
2709    // it's a constant that should come from the display driver.
2710    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2711    char property[PROPERTY_VALUE_MAX];
2712    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2713        //displayOrientation
2714        switch (atoi(property)) {
2715        case 90:
2716            displayOrientation = ISurfaceComposer::eOrientation90;
2717            break;
2718        case 270:
2719            displayOrientation = ISurfaceComposer::eOrientation270;
2720            break;
2721        }
2722    }
2723
2724    const float w = hw->getWidth();
2725    const float h = hw->getHeight();
2726    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2727            &mDisplayTransform);
2728    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2729        mDisplayWidth = h;
2730        mDisplayHeight = w;
2731    } else {
2732        mDisplayWidth = w;
2733        mDisplayHeight = h;
2734    }
2735
2736    setOrientation(ISurfaceComposer::eOrientationDefault);
2737}
2738
2739status_t GraphicPlane::orientationToTransfrom(
2740        int orientation, int w, int h, Transform* tr)
2741{
2742    uint32_t flags = 0;
2743    switch (orientation) {
2744    case ISurfaceComposer::eOrientationDefault:
2745        flags = Transform::ROT_0;
2746        break;
2747    case ISurfaceComposer::eOrientation90:
2748        flags = Transform::ROT_90;
2749        break;
2750    case ISurfaceComposer::eOrientation180:
2751        flags = Transform::ROT_180;
2752        break;
2753    case ISurfaceComposer::eOrientation270:
2754        flags = Transform::ROT_270;
2755        break;
2756    default:
2757        return BAD_VALUE;
2758    }
2759    tr->set(flags, w, h);
2760    return NO_ERROR;
2761}
2762
2763status_t GraphicPlane::setOrientation(int orientation)
2764{
2765    // If the rotation can be handled in hardware, this is where
2766    // the magic should happen.
2767
2768    const DisplayHardware& hw(displayHardware());
2769    const float w = mDisplayWidth;
2770    const float h = mDisplayHeight;
2771    mWidth = int(w);
2772    mHeight = int(h);
2773
2774    Transform orientationTransform;
2775    GraphicPlane::orientationToTransfrom(orientation, w, h,
2776            &orientationTransform);
2777    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2778        mWidth = int(h);
2779        mHeight = int(w);
2780    }
2781
2782    mOrientation = orientation;
2783    mGlobalTransform = mDisplayTransform * orientationTransform;
2784    return NO_ERROR;
2785}
2786
2787const DisplayHardware& GraphicPlane::displayHardware() const {
2788    return *mHw;
2789}
2790
2791DisplayHardware& GraphicPlane::editDisplayHardware() {
2792    return *mHw;
2793}
2794
2795const Transform& GraphicPlane::transform() const {
2796    return mGlobalTransform;
2797}
2798
2799EGLDisplay GraphicPlane::getEGLDisplay() const {
2800    return mHw->getEGLDisplay();
2801}
2802
2803// ---------------------------------------------------------------------------
2804
2805}; // namespace android
2806