SurfaceFlinger.cpp revision f6de1c04ffc2c7a739578b7612944fddb7011ab7 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35#include <binder/PermissionCache.h>
36
37#include <gui/IDisplayEventConnection.h>
38
39#include <utils/String8.h>
40#include <utils/String16.h>
41#include <utils/StopWatch.h>
42
43#include <ui/GraphicBufferAllocator.h>
44#include <ui/PixelFormat.h>
45
46#include <pixelflinger/pixelflinger.h>
47#include <GLES/gl.h>
48
49#include "clz.h"
50#include "DisplayEventConnection.h"
51#include "EventThread.h"
52#include "GLExtensions.h"
53#include "DdmConnection.h"
54#include "Layer.h"
55#include "LayerDim.h"
56#include "LayerScreenshot.h"
57#include "SurfaceFlinger.h"
58
59#include "DisplayHardware/DisplayHardware.h"
60#include "DisplayHardware/HWComposer.h"
61
62#include <private/android_filesystem_config.h>
63#include <private/surfaceflinger/SharedBufferStack.h>
64
65#define EGL_VERSION_HW_ANDROID  0x3143
66
67#define DISPLAY_COUNT       1
68
69namespace android {
70// ---------------------------------------------------------------------------
71
72const String16 sHardwareTest("android.permission.HARDWARE_TEST");
73const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
74const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
75const String16 sDump("android.permission.DUMP");
76
77// ---------------------------------------------------------------------------
78
79SurfaceFlinger::SurfaceFlinger()
80    :   BnSurfaceComposer(), Thread(false),
81        mTransactionFlags(0),
82        mTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mElectronBeamAnimationMode(0),
88        mDebugRegion(0),
89        mDebugBackground(0),
90        mDebugDDMS(0),
91        mDebugDisableHWC(0),
92        mDebugDisableTransformHint(0),
93        mDebugInSwapBuffers(0),
94        mLastSwapBufferTime(0),
95        mDebugInTransaction(0),
96        mLastTransactionTime(0),
97        mBootFinished(false),
98        mConsoleSignals(0),
99        mSecureFrameBuffer(0)
100{
101    init();
102}
103
104void SurfaceFlinger::init()
105{
106    ALOGI("SurfaceFlinger is starting");
107
108    // debugging stuff...
109    char value[PROPERTY_VALUE_MAX];
110
111    property_get("debug.sf.showupdates", value, "0");
112    mDebugRegion = atoi(value);
113
114    property_get("debug.sf.showbackground", value, "0");
115    mDebugBackground = atoi(value);
116
117    property_get("debug.sf.ddms", value, "0");
118    mDebugDDMS = atoi(value);
119    if (mDebugDDMS) {
120        DdmConnection::start(getServiceName());
121    }
122
123    ALOGI_IF(mDebugRegion,       "showupdates enabled");
124    ALOGI_IF(mDebugBackground,   "showbackground enabled");
125    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
126}
127
128void SurfaceFlinger::onFirstRef()
129{
130    mEventQueue.init(this);
131
132    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
133
134    // Wait for the main thread to be done with its initialization
135    mReadyToRunBarrier.wait();
136}
137
138
139SurfaceFlinger::~SurfaceFlinger()
140{
141    glDeleteTextures(1, &mWormholeTexName);
142}
143
144void SurfaceFlinger::binderDied(const wp<IBinder>& who)
145{
146    // the window manager died on us. prepare its eulogy.
147
148    // reset screen orientation
149    Vector<ComposerState> state;
150    setTransactionState(state, eOrientationDefault, 0);
151
152    // restart the boot-animation
153    property_set("ctl.start", "bootanim");
154}
155
156sp<IMemoryHeap> SurfaceFlinger::getCblk() const
157{
158    return mServerHeap;
159}
160
161sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
162{
163    sp<ISurfaceComposerClient> bclient;
164    sp<Client> client(new Client(this));
165    status_t err = client->initCheck();
166    if (err == NO_ERROR) {
167        bclient = client;
168    }
169    return bclient;
170}
171
172sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
173{
174    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
175    return gba;
176}
177
178const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
179{
180    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
181    const GraphicPlane& plane(mGraphicPlanes[dpy]);
182    return plane;
183}
184
185GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
186{
187    return const_cast<GraphicPlane&>(
188        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
189}
190
191void SurfaceFlinger::bootFinished()
192{
193    const nsecs_t now = systemTime();
194    const nsecs_t duration = now - mBootTime;
195    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
196    mBootFinished = true;
197
198    // wait patiently for the window manager death
199    const String16 name("window");
200    sp<IBinder> window(defaultServiceManager()->getService(name));
201    if (window != 0) {
202        window->linkToDeath(this);
203    }
204
205    // stop boot animation
206    property_set("ctl.stop", "bootanim");
207}
208
209static inline uint16_t pack565(int r, int g, int b) {
210    return (r<<11)|(g<<5)|b;
211}
212
213status_t SurfaceFlinger::readyToRun()
214{
215    ALOGI(   "SurfaceFlinger's main thread ready to run. "
216            "Initializing graphics H/W...");
217
218    // we only support one display currently
219    int dpy = 0;
220
221    {
222        // initialize the main display
223        GraphicPlane& plane(graphicPlane(dpy));
224        DisplayHardware* const hw = new DisplayHardware(this, dpy);
225        plane.setDisplayHardware(hw);
226    }
227
228    // create the shared control-block
229    mServerHeap = new MemoryHeapBase(4096,
230            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
231    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
232
233    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
234    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
235
236    new(mServerCblk) surface_flinger_cblk_t;
237
238    // initialize primary screen
239    // (other display should be initialized in the same manner, but
240    // asynchronously, as they could come and go. None of this is supported
241    // yet).
242    const GraphicPlane& plane(graphicPlane(dpy));
243    const DisplayHardware& hw = plane.displayHardware();
244    const uint32_t w = hw.getWidth();
245    const uint32_t h = hw.getHeight();
246    const uint32_t f = hw.getFormat();
247    hw.makeCurrent();
248
249    // initialize the shared control block
250    mServerCblk->connected |= 1<<dpy;
251    display_cblk_t* dcblk = mServerCblk->displays + dpy;
252    memset(dcblk, 0, sizeof(display_cblk_t));
253    dcblk->w            = plane.getWidth();
254    dcblk->h            = plane.getHeight();
255    dcblk->format       = f;
256    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
257    dcblk->xdpi         = hw.getDpiX();
258    dcblk->ydpi         = hw.getDpiY();
259    dcblk->fps          = hw.getRefreshRate();
260    dcblk->density      = hw.getDensity();
261
262    // Initialize OpenGL|ES
263    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
264    glPixelStorei(GL_PACK_ALIGNMENT, 4);
265    glEnableClientState(GL_VERTEX_ARRAY);
266    glEnable(GL_SCISSOR_TEST);
267    glShadeModel(GL_FLAT);
268    glDisable(GL_DITHER);
269    glDisable(GL_CULL_FACE);
270
271    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
272    const uint16_t g1 = pack565(0x17,0x2f,0x17);
273    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
274    glGenTextures(1, &mWormholeTexName);
275    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
276    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
277    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
278    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
280    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
281            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
282
283    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
284    glGenTextures(1, &mProtectedTexName);
285    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
286    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
287    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
288    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
290    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
291            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
292
293    glViewport(0, 0, w, h);
294    glMatrixMode(GL_PROJECTION);
295    glLoadIdentity();
296    // put the origin in the left-bottom corner
297    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
298
299
300    // start the EventThread
301    mEventThread = new EventThread(this);
302    mEventQueue.setEventThread(mEventThread);
303    hw.startSleepManagement();
304
305    /*
306     *  We're now ready to accept clients...
307     */
308
309    mReadyToRunBarrier.open();
310
311    // start boot animation
312    property_set("ctl.start", "bootanim");
313
314    return NO_ERROR;
315}
316
317// ----------------------------------------------------------------------------
318
319bool SurfaceFlinger::authenticateSurfaceTexture(
320        const sp<ISurfaceTexture>& surfaceTexture) const {
321    Mutex::Autolock _l(mStateLock);
322    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
323
324    // Check the visible layer list for the ISurface
325    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
326    size_t count = currentLayers.size();
327    for (size_t i=0 ; i<count ; i++) {
328        const sp<LayerBase>& layer(currentLayers[i]);
329        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
330        if (lbc != NULL) {
331            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
332            if (lbcBinder == surfaceTextureBinder) {
333                return true;
334            }
335        }
336    }
337
338    // Check the layers in the purgatory.  This check is here so that if a
339    // SurfaceTexture gets destroyed before all the clients are done using it,
340    // the error will not be reported as "surface XYZ is not authenticated", but
341    // will instead fail later on when the client tries to use the surface,
342    // which should be reported as "surface XYZ returned an -ENODEV".  The
343    // purgatorized layers are no less authentic than the visible ones, so this
344    // should not cause any harm.
345    size_t purgatorySize =  mLayerPurgatory.size();
346    for (size_t i=0 ; i<purgatorySize ; i++) {
347        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
348        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
349        if (lbc != NULL) {
350            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
351            if (lbcBinder == surfaceTextureBinder) {
352                return true;
353            }
354        }
355    }
356
357    return false;
358}
359
360// ----------------------------------------------------------------------------
361
362sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
363    return mEventThread->createEventConnection();
364}
365
366// ----------------------------------------------------------------------------
367
368void SurfaceFlinger::waitForEvent() {
369    mEventQueue.waitMessage();
370}
371
372void SurfaceFlinger::signalTransaction() {
373    mEventQueue.invalidate();
374}
375
376void SurfaceFlinger::signalLayerUpdate() {
377    mEventQueue.invalidate();
378}
379
380void SurfaceFlinger::signalRefresh() {
381    mEventQueue.refresh();
382}
383
384status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
385        nsecs_t reltime, uint32_t flags) {
386    return mEventQueue.postMessage(msg, reltime);
387}
388
389status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
390        nsecs_t reltime, uint32_t flags) {
391    status_t res = mEventQueue.postMessage(msg, reltime);
392    if (res == NO_ERROR) {
393        msg->wait();
394    }
395    return res;
396}
397
398bool SurfaceFlinger::threadLoop()
399{
400    waitForEvent();
401    return true;
402}
403
404void SurfaceFlinger::onMessageReceived(int32_t what)
405{
406    switch (what) {
407        case MessageQueue::REFRESH: {
408//        case MessageQueue::INVALIDATE: {
409            // check for transactions
410            if (CC_UNLIKELY(mConsoleSignals)) {
411                handleConsoleEvents();
412            }
413
414            // if we're in a global transaction, don't do anything.
415            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
416            uint32_t transactionFlags = peekTransactionFlags(mask);
417            if (CC_UNLIKELY(transactionFlags)) {
418                handleTransaction(transactionFlags);
419            }
420
421            // post surfaces (if needed)
422            handlePageFlip();
423
424//            signalRefresh();
425//
426//        } break;
427//
428//        case MessageQueue::REFRESH: {
429
430            handleRefresh();
431
432            const DisplayHardware& hw(graphicPlane(0).displayHardware());
433
434//            if (mDirtyRegion.isEmpty()) {
435//                return;
436//            }
437
438            if (CC_UNLIKELY(mHwWorkListDirty)) {
439                // build the h/w work list
440                handleWorkList();
441            }
442
443            if (CC_LIKELY(hw.canDraw())) {
444                // repaint the framebuffer (if needed)
445                handleRepaint();
446                // inform the h/w that we're done compositing
447                hw.compositionComplete();
448                postFramebuffer();
449            } else {
450                // pretend we did the post
451                hw.compositionComplete();
452            }
453
454        } break;
455    }
456}
457
458void SurfaceFlinger::postFramebuffer()
459{
460    // mSwapRegion can be empty here is some cases, for instance if a hidden
461    // or fully transparent window is updating.
462    // in that case, we need to flip anyways to not risk a deadlock with
463    // h/w composer.
464
465    const DisplayHardware& hw(graphicPlane(0).displayHardware());
466    const nsecs_t now = systemTime();
467    mDebugInSwapBuffers = now;
468    hw.flip(mSwapRegion);
469
470    size_t numLayers = mVisibleLayersSortedByZ.size();
471    for (size_t i = 0; i < numLayers; i++) {
472        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
473    }
474
475    mLastSwapBufferTime = systemTime() - now;
476    mDebugInSwapBuffers = 0;
477    mSwapRegion.clear();
478}
479
480void SurfaceFlinger::handleConsoleEvents()
481{
482    // something to do with the console
483    const DisplayHardware& hw = graphicPlane(0).displayHardware();
484
485    int what = android_atomic_and(0, &mConsoleSignals);
486    if (what & eConsoleAcquired) {
487        hw.acquireScreen();
488        // this is a temporary work-around, eventually this should be called
489        // by the power-manager
490        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
491    }
492
493    if (what & eConsoleReleased) {
494        if (hw.isScreenAcquired()) {
495            hw.releaseScreen();
496        }
497    }
498
499    mDirtyRegion.set(hw.bounds());
500}
501
502void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
503{
504    Mutex::Autolock _l(mStateLock);
505    const nsecs_t now = systemTime();
506    mDebugInTransaction = now;
507
508    // Here we're guaranteed that some transaction flags are set
509    // so we can call handleTransactionLocked() unconditionally.
510    // We call getTransactionFlags(), which will also clear the flags,
511    // with mStateLock held to guarantee that mCurrentState won't change
512    // until the transaction is committed.
513
514    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
515    transactionFlags = getTransactionFlags(mask);
516    handleTransactionLocked(transactionFlags);
517
518    mLastTransactionTime = systemTime() - now;
519    mDebugInTransaction = 0;
520    invalidateHwcGeometry();
521    // here the transaction has been committed
522}
523
524void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
525{
526    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
527    const size_t count = currentLayers.size();
528
529    /*
530     * Traversal of the children
531     * (perform the transaction for each of them if needed)
532     */
533
534    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
535    if (layersNeedTransaction) {
536        for (size_t i=0 ; i<count ; i++) {
537            const sp<LayerBase>& layer = currentLayers[i];
538            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
539            if (!trFlags) continue;
540
541            const uint32_t flags = layer->doTransaction(0);
542            if (flags & Layer::eVisibleRegion)
543                mVisibleRegionsDirty = true;
544        }
545    }
546
547    /*
548     * Perform our own transaction if needed
549     */
550
551    if (transactionFlags & eTransactionNeeded) {
552        if (mCurrentState.orientation != mDrawingState.orientation) {
553            // the orientation has changed, recompute all visible regions
554            // and invalidate everything.
555
556            const int dpy = 0;
557            const int orientation = mCurrentState.orientation;
558            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
559            GraphicPlane& plane(graphicPlane(dpy));
560            plane.setOrientation(orientation);
561
562            // update the shared control block
563            const DisplayHardware& hw(plane.displayHardware());
564            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
565            dcblk->orientation = orientation;
566            dcblk->w = plane.getWidth();
567            dcblk->h = plane.getHeight();
568
569            mVisibleRegionsDirty = true;
570            mDirtyRegion.set(hw.bounds());
571        }
572
573        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
574            // layers have been added
575            mVisibleRegionsDirty = true;
576        }
577
578        // some layers might have been removed, so
579        // we need to update the regions they're exposing.
580        if (mLayersRemoved) {
581            mLayersRemoved = false;
582            mVisibleRegionsDirty = true;
583            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
584            const size_t count = previousLayers.size();
585            for (size_t i=0 ; i<count ; i++) {
586                const sp<LayerBase>& layer(previousLayers[i]);
587                if (currentLayers.indexOf( layer ) < 0) {
588                    // this layer is not visible anymore
589                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
590                }
591            }
592        }
593    }
594
595    commitTransaction();
596}
597
598void SurfaceFlinger::computeVisibleRegions(
599    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
600{
601    const GraphicPlane& plane(graphicPlane(0));
602    const Transform& planeTransform(plane.transform());
603    const DisplayHardware& hw(plane.displayHardware());
604    const Region screenRegion(hw.bounds());
605
606    Region aboveOpaqueLayers;
607    Region aboveCoveredLayers;
608    Region dirty;
609
610    bool secureFrameBuffer = false;
611
612    size_t i = currentLayers.size();
613    while (i--) {
614        const sp<LayerBase>& layer = currentLayers[i];
615        layer->validateVisibility(planeTransform);
616
617        // start with the whole surface at its current location
618        const Layer::State& s(layer->drawingState());
619
620        /*
621         * opaqueRegion: area of a surface that is fully opaque.
622         */
623        Region opaqueRegion;
624
625        /*
626         * visibleRegion: area of a surface that is visible on screen
627         * and not fully transparent. This is essentially the layer's
628         * footprint minus the opaque regions above it.
629         * Areas covered by a translucent surface are considered visible.
630         */
631        Region visibleRegion;
632
633        /*
634         * coveredRegion: area of a surface that is covered by all
635         * visible regions above it (which includes the translucent areas).
636         */
637        Region coveredRegion;
638
639
640        // handle hidden surfaces by setting the visible region to empty
641        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
642            const bool translucent = !layer->isOpaque();
643            const Rect bounds(layer->visibleBounds());
644            visibleRegion.set(bounds);
645            visibleRegion.andSelf(screenRegion);
646            if (!visibleRegion.isEmpty()) {
647                // Remove the transparent area from the visible region
648                if (translucent) {
649                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
650                }
651
652                // compute the opaque region
653                const int32_t layerOrientation = layer->getOrientation();
654                if (s.alpha==255 && !translucent &&
655                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
656                    // the opaque region is the layer's footprint
657                    opaqueRegion = visibleRegion;
658                }
659            }
660        }
661
662        // Clip the covered region to the visible region
663        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
664
665        // Update aboveCoveredLayers for next (lower) layer
666        aboveCoveredLayers.orSelf(visibleRegion);
667
668        // subtract the opaque region covered by the layers above us
669        visibleRegion.subtractSelf(aboveOpaqueLayers);
670
671        // compute this layer's dirty region
672        if (layer->contentDirty) {
673            // we need to invalidate the whole region
674            dirty = visibleRegion;
675            // as well, as the old visible region
676            dirty.orSelf(layer->visibleRegionScreen);
677            layer->contentDirty = false;
678        } else {
679            /* compute the exposed region:
680             *   the exposed region consists of two components:
681             *   1) what's VISIBLE now and was COVERED before
682             *   2) what's EXPOSED now less what was EXPOSED before
683             *
684             * note that (1) is conservative, we start with the whole
685             * visible region but only keep what used to be covered by
686             * something -- which mean it may have been exposed.
687             *
688             * (2) handles areas that were not covered by anything but got
689             * exposed because of a resize.
690             */
691            const Region newExposed = visibleRegion - coveredRegion;
692            const Region oldVisibleRegion = layer->visibleRegionScreen;
693            const Region oldCoveredRegion = layer->coveredRegionScreen;
694            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
695            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
696        }
697        dirty.subtractSelf(aboveOpaqueLayers);
698
699        // accumulate to the screen dirty region
700        dirtyRegion.orSelf(dirty);
701
702        // Update aboveOpaqueLayers for next (lower) layer
703        aboveOpaqueLayers.orSelf(opaqueRegion);
704
705        // Store the visible region is screen space
706        layer->setVisibleRegion(visibleRegion);
707        layer->setCoveredRegion(coveredRegion);
708
709        // If a secure layer is partially visible, lock-down the screen!
710        if (layer->isSecure() && !visibleRegion.isEmpty()) {
711            secureFrameBuffer = true;
712        }
713    }
714
715    // invalidate the areas where a layer was removed
716    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
717    mDirtyRegionRemovedLayer.clear();
718
719    mSecureFrameBuffer = secureFrameBuffer;
720    opaqueRegion = aboveOpaqueLayers;
721}
722
723
724void SurfaceFlinger::commitTransaction()
725{
726    if (!mLayersPendingRemoval.isEmpty()) {
727        // Notify removed layers now that they can't be drawn from
728        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
729            mLayersPendingRemoval[i]->onRemoved();
730        }
731        mLayersPendingRemoval.clear();
732    }
733
734    mDrawingState = mCurrentState;
735    mTransationPending = false;
736    mTransactionCV.broadcast();
737}
738
739void SurfaceFlinger::handlePageFlip()
740{
741    const DisplayHardware& hw = graphicPlane(0).displayHardware();
742    const Region screenRegion(hw.bounds());
743
744    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
745    const bool visibleRegions = lockPageFlip(currentLayers);
746
747        if (visibleRegions || mVisibleRegionsDirty) {
748            Region opaqueRegion;
749            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
750
751            /*
752             *  rebuild the visible layer list
753             */
754            const size_t count = currentLayers.size();
755            mVisibleLayersSortedByZ.clear();
756            mVisibleLayersSortedByZ.setCapacity(count);
757            for (size_t i=0 ; i<count ; i++) {
758                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
759                    mVisibleLayersSortedByZ.add(currentLayers[i]);
760            }
761
762            mWormholeRegion = screenRegion.subtract(opaqueRegion);
763            mVisibleRegionsDirty = false;
764            invalidateHwcGeometry();
765        }
766
767    unlockPageFlip(currentLayers);
768
769    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
770    mDirtyRegion.andSelf(screenRegion);
771}
772
773void SurfaceFlinger::invalidateHwcGeometry()
774{
775    mHwWorkListDirty = true;
776}
777
778bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
779{
780    bool recomputeVisibleRegions = false;
781    size_t count = currentLayers.size();
782    sp<LayerBase> const* layers = currentLayers.array();
783    for (size_t i=0 ; i<count ; i++) {
784        const sp<LayerBase>& layer(layers[i]);
785        layer->lockPageFlip(recomputeVisibleRegions);
786    }
787    return recomputeVisibleRegions;
788}
789
790void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
791{
792    const GraphicPlane& plane(graphicPlane(0));
793    const Transform& planeTransform(plane.transform());
794    const size_t count = currentLayers.size();
795    sp<LayerBase> const* layers = currentLayers.array();
796    for (size_t i=0 ; i<count ; i++) {
797        const sp<LayerBase>& layer(layers[i]);
798        layer->unlockPageFlip(planeTransform, mDirtyRegion);
799    }
800}
801
802void SurfaceFlinger::handleRefresh()
803{
804    bool needInvalidate = false;
805    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
806    const size_t count = currentLayers.size();
807    for (size_t i=0 ; i<count ; i++) {
808        const sp<LayerBase>& layer(currentLayers[i]);
809        if (layer->onPreComposition()) {
810            needInvalidate = true;
811        }
812    }
813    if (needInvalidate) {
814        signalLayerUpdate();
815    }
816}
817
818
819void SurfaceFlinger::handleWorkList()
820{
821    mHwWorkListDirty = false;
822    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
823    if (hwc.initCheck() == NO_ERROR) {
824        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
825        const size_t count = currentLayers.size();
826        hwc.createWorkList(count);
827        hwc_layer_t* const cur(hwc.getLayers());
828        for (size_t i=0 ; cur && i<count ; i++) {
829            currentLayers[i]->setGeometry(&cur[i]);
830            if (mDebugDisableHWC || mDebugRegion) {
831                cur[i].compositionType = HWC_FRAMEBUFFER;
832                cur[i].flags |= HWC_SKIP_LAYER;
833            }
834        }
835    }
836}
837
838void SurfaceFlinger::handleRepaint()
839{
840    // compute the invalid region
841    mSwapRegion.orSelf(mDirtyRegion);
842
843    if (CC_UNLIKELY(mDebugRegion)) {
844        debugFlashRegions();
845    }
846
847    // set the frame buffer
848    const DisplayHardware& hw(graphicPlane(0).displayHardware());
849    glMatrixMode(GL_MODELVIEW);
850    glLoadIdentity();
851
852    uint32_t flags = hw.getFlags();
853    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
854        (flags & DisplayHardware::BUFFER_PRESERVED))
855    {
856        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
857        // takes a rectangle, we must make sure to update that whole
858        // rectangle in that case
859        if (flags & DisplayHardware::SWAP_RECTANGLE) {
860            // TODO: we really should be able to pass a region to
861            // SWAP_RECTANGLE so that we don't have to redraw all this.
862            mDirtyRegion.set(mSwapRegion.bounds());
863        } else {
864            // in the BUFFER_PRESERVED case, obviously, we can update only
865            // what's needed and nothing more.
866            // NOTE: this is NOT a common case, as preserving the backbuffer
867            // is costly and usually involves copying the whole update back.
868        }
869    } else {
870        if (flags & DisplayHardware::PARTIAL_UPDATES) {
871            // We need to redraw the rectangle that will be updated
872            // (pushed to the framebuffer).
873            // This is needed because PARTIAL_UPDATES only takes one
874            // rectangle instead of a region (see DisplayHardware::flip())
875            mDirtyRegion.set(mSwapRegion.bounds());
876        } else {
877            // we need to redraw everything (the whole screen)
878            mDirtyRegion.set(hw.bounds());
879            mSwapRegion = mDirtyRegion;
880        }
881    }
882
883    setupHardwareComposer(mDirtyRegion);
884    composeSurfaces(mDirtyRegion);
885
886    // update the swap region and clear the dirty region
887    mSwapRegion.orSelf(mDirtyRegion);
888    mDirtyRegion.clear();
889}
890
891void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
892{
893    const DisplayHardware& hw(graphicPlane(0).displayHardware());
894    HWComposer& hwc(hw.getHwComposer());
895    hwc_layer_t* const cur(hwc.getLayers());
896    if (!cur) {
897        return;
898    }
899
900    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
901    size_t count = layers.size();
902
903    ALOGE_IF(hwc.getNumLayers() != count,
904            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
905            hwc.getNumLayers(), count);
906
907    // just to be extra-safe, use the smallest count
908    if (hwc.initCheck() == NO_ERROR) {
909        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
910    }
911
912    /*
913     *  update the per-frame h/w composer data for each layer
914     *  and build the transparent region of the FB
915     */
916    for (size_t i=0 ; i<count ; i++) {
917        const sp<LayerBase>& layer(layers[i]);
918        layer->setPerFrameData(&cur[i]);
919    }
920    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
921    status_t err = hwc.prepare();
922    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
923
924    if (err == NO_ERROR) {
925        // what's happening here is tricky.
926        // we want to clear all the layers with the CLEAR_FB flags
927        // that are opaque.
928        // however, since some GPU are efficient at preserving
929        // the backbuffer, we want to take advantage of that so we do the
930        // clear only in the dirty region (other areas will be preserved
931        // on those GPUs).
932        //   NOTE: on non backbuffer preserving GPU, the dirty region
933        //   has already been expanded as needed, so the code is correct
934        //   there too.
935        //
936        // However, the content of the framebuffer cannot be trusted when
937        // we switch to/from FB/OVERLAY, in which case we need to
938        // expand the dirty region to those areas too.
939        //
940        // Note also that there is a special case when switching from
941        // "no layers in FB" to "some layers in FB", where we need to redraw
942        // the entire FB, since some areas might contain uninitialized
943        // data.
944        //
945        // Also we want to make sure to not clear areas that belong to
946        // layers above that won't redraw (we would just be erasing them),
947        // that is, we can't erase anything outside the dirty region.
948
949        Region transparent;
950
951        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
952            transparent.set(hw.getBounds());
953            dirtyInOut = transparent;
954        } else {
955            for (size_t i=0 ; i<count ; i++) {
956                const sp<LayerBase>& layer(layers[i]);
957                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
958                    transparent.orSelf(layer->visibleRegionScreen);
959                }
960                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
961                if (isOverlay != layer->isOverlay()) {
962                    // we transitioned to/from overlay, so add this layer
963                    // to the dirty region so the framebuffer can be either
964                    // cleared or redrawn.
965                    dirtyInOut.orSelf(layer->visibleRegionScreen);
966                }
967                layer->setOverlay(isOverlay);
968            }
969            // don't erase stuff outside the dirty region
970            transparent.andSelf(dirtyInOut);
971        }
972
973        /*
974         *  clear the area of the FB that need to be transparent
975         */
976        if (!transparent.isEmpty()) {
977            glClearColor(0,0,0,0);
978            Region::const_iterator it = transparent.begin();
979            Region::const_iterator const end = transparent.end();
980            const int32_t height = hw.getHeight();
981            while (it != end) {
982                const Rect& r(*it++);
983                const GLint sy = height - (r.top + r.height());
984                glScissor(r.left, sy, r.width(), r.height());
985                glClear(GL_COLOR_BUFFER_BIT);
986            }
987        }
988    }
989}
990
991void SurfaceFlinger::composeSurfaces(const Region& dirty)
992{
993    const DisplayHardware& hw(graphicPlane(0).displayHardware());
994    HWComposer& hwc(hw.getHwComposer());
995
996    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
997    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
998        // should never happen unless the window manager has a bug
999        // draw something...
1000        drawWormhole();
1001    }
1002
1003    /*
1004     * and then, render the layers targeted at the framebuffer
1005     */
1006    hwc_layer_t* const cur(hwc.getLayers());
1007    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1008    size_t count = layers.size();
1009    for (size_t i=0 ; i<count ; i++) {
1010        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1011            continue;
1012        }
1013        const sp<LayerBase>& layer(layers[i]);
1014        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1015        if (!clip.isEmpty()) {
1016            layer->draw(clip);
1017        }
1018    }
1019}
1020
1021void SurfaceFlinger::debugFlashRegions()
1022{
1023    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1024    const uint32_t flags = hw.getFlags();
1025    const int32_t height = hw.getHeight();
1026    if (mSwapRegion.isEmpty()) {
1027        return;
1028    }
1029
1030    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1031            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1032        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1033                mDirtyRegion.bounds() : hw.bounds());
1034        composeSurfaces(repaint);
1035    }
1036
1037    glDisable(GL_TEXTURE_EXTERNAL_OES);
1038    glDisable(GL_TEXTURE_2D);
1039    glDisable(GL_BLEND);
1040    glDisable(GL_SCISSOR_TEST);
1041
1042    static int toggle = 0;
1043    toggle = 1 - toggle;
1044    if (toggle) {
1045        glColor4f(1, 0, 1, 1);
1046    } else {
1047        glColor4f(1, 1, 0, 1);
1048    }
1049
1050    Region::const_iterator it = mDirtyRegion.begin();
1051    Region::const_iterator const end = mDirtyRegion.end();
1052    while (it != end) {
1053        const Rect& r = *it++;
1054        GLfloat vertices[][2] = {
1055                { r.left,  height - r.top },
1056                { r.left,  height - r.bottom },
1057                { r.right, height - r.bottom },
1058                { r.right, height - r.top }
1059        };
1060        glVertexPointer(2, GL_FLOAT, 0, vertices);
1061        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1062    }
1063
1064    hw.flip(mSwapRegion);
1065
1066    if (mDebugRegion > 1)
1067        usleep(mDebugRegion * 1000);
1068
1069    glEnable(GL_SCISSOR_TEST);
1070}
1071
1072void SurfaceFlinger::drawWormhole() const
1073{
1074    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1075    if (region.isEmpty())
1076        return;
1077
1078    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1079    const int32_t width = hw.getWidth();
1080    const int32_t height = hw.getHeight();
1081
1082    if (CC_LIKELY(!mDebugBackground)) {
1083        glClearColor(0,0,0,0);
1084        Region::const_iterator it = region.begin();
1085        Region::const_iterator const end = region.end();
1086        while (it != end) {
1087            const Rect& r = *it++;
1088            const GLint sy = height - (r.top + r.height());
1089            glScissor(r.left, sy, r.width(), r.height());
1090            glClear(GL_COLOR_BUFFER_BIT);
1091        }
1092    } else {
1093        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1094                { width, height }, { 0, height }  };
1095        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1096
1097        glVertexPointer(2, GL_SHORT, 0, vertices);
1098        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1099        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1100
1101        glDisable(GL_TEXTURE_EXTERNAL_OES);
1102        glEnable(GL_TEXTURE_2D);
1103        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1104        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1105        glMatrixMode(GL_TEXTURE);
1106        glLoadIdentity();
1107
1108        glDisable(GL_BLEND);
1109
1110        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1111        Region::const_iterator it = region.begin();
1112        Region::const_iterator const end = region.end();
1113        while (it != end) {
1114            const Rect& r = *it++;
1115            const GLint sy = height - (r.top + r.height());
1116            glScissor(r.left, sy, r.width(), r.height());
1117            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1118        }
1119        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1120        glDisable(GL_TEXTURE_2D);
1121        glLoadIdentity();
1122        glMatrixMode(GL_MODELVIEW);
1123    }
1124}
1125
1126status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1127{
1128    Mutex::Autolock _l(mStateLock);
1129    addLayer_l(layer);
1130    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1131    return NO_ERROR;
1132}
1133
1134status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1135{
1136    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1137    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1138}
1139
1140ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1141        const sp<LayerBaseClient>& lbc)
1142{
1143    // attach this layer to the client
1144    size_t name = client->attachLayer(lbc);
1145
1146    Mutex::Autolock _l(mStateLock);
1147
1148    // add this layer to the current state list
1149    addLayer_l(lbc);
1150
1151    return ssize_t(name);
1152}
1153
1154status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1155{
1156    Mutex::Autolock _l(mStateLock);
1157    status_t err = purgatorizeLayer_l(layer);
1158    if (err == NO_ERROR)
1159        setTransactionFlags(eTransactionNeeded);
1160    return err;
1161}
1162
1163status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1164{
1165    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1166    if (lbc != 0) {
1167        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1168    }
1169    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1170    if (index >= 0) {
1171        mLayersRemoved = true;
1172        return NO_ERROR;
1173    }
1174    return status_t(index);
1175}
1176
1177status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1178{
1179    // First add the layer to the purgatory list, which makes sure it won't
1180    // go away, then remove it from the main list (through a transaction).
1181    ssize_t err = removeLayer_l(layerBase);
1182    if (err >= 0) {
1183        mLayerPurgatory.add(layerBase);
1184    }
1185
1186    mLayersPendingRemoval.push(layerBase);
1187
1188    // it's possible that we don't find a layer, because it might
1189    // have been destroyed already -- this is not technically an error
1190    // from the user because there is a race between Client::destroySurface(),
1191    // ~Client() and ~ISurface().
1192    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1193}
1194
1195status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1196{
1197    layer->forceVisibilityTransaction();
1198    setTransactionFlags(eTraversalNeeded);
1199    return NO_ERROR;
1200}
1201
1202uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1203{
1204    return android_atomic_release_load(&mTransactionFlags);
1205}
1206
1207uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1208{
1209    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1210}
1211
1212uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1213{
1214    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1215    if ((old & flags)==0) { // wake the server up
1216        signalTransaction();
1217    }
1218    return old;
1219}
1220
1221
1222void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1223        int orientation, uint32_t flags) {
1224    Mutex::Autolock _l(mStateLock);
1225
1226    uint32_t transactionFlags = 0;
1227    if (mCurrentState.orientation != orientation) {
1228        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1229            mCurrentState.orientation = orientation;
1230            transactionFlags |= eTransactionNeeded;
1231        } else if (orientation != eOrientationUnchanged) {
1232            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1233                    orientation);
1234        }
1235    }
1236
1237    const size_t count = state.size();
1238    for (size_t i=0 ; i<count ; i++) {
1239        const ComposerState& s(state[i]);
1240        sp<Client> client( static_cast<Client *>(s.client.get()) );
1241        transactionFlags |= setClientStateLocked(client, s.state);
1242    }
1243
1244    if (transactionFlags) {
1245        // this triggers the transaction
1246        setTransactionFlags(transactionFlags);
1247
1248        // if this is a synchronous transaction, wait for it to take effect
1249        // before returning.
1250        if (flags & eSynchronous) {
1251            mTransationPending = true;
1252        }
1253        while (mTransationPending) {
1254            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1255            if (CC_UNLIKELY(err != NO_ERROR)) {
1256                // just in case something goes wrong in SF, return to the
1257                // called after a few seconds.
1258                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1259                mTransationPending = false;
1260                break;
1261            }
1262        }
1263    }
1264}
1265
1266sp<ISurface> SurfaceFlinger::createSurface(
1267        ISurfaceComposerClient::surface_data_t* params,
1268        const String8& name,
1269        const sp<Client>& client,
1270        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1271        uint32_t flags)
1272{
1273    sp<LayerBaseClient> layer;
1274    sp<ISurface> surfaceHandle;
1275
1276    if (int32_t(w|h) < 0) {
1277        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1278                int(w), int(h));
1279        return surfaceHandle;
1280    }
1281
1282    //ALOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1283    sp<Layer> normalLayer;
1284    switch (flags & eFXSurfaceMask) {
1285        case eFXSurfaceNormal:
1286            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1287            layer = normalLayer;
1288            break;
1289        case eFXSurfaceBlur:
1290            // for now we treat Blur as Dim, until we can implement it
1291            // efficiently.
1292        case eFXSurfaceDim:
1293            layer = createDimSurface(client, d, w, h, flags);
1294            break;
1295        case eFXSurfaceScreenshot:
1296            layer = createScreenshotSurface(client, d, w, h, flags);
1297            break;
1298    }
1299
1300    if (layer != 0) {
1301        layer->initStates(w, h, flags);
1302        layer->setName(name);
1303        ssize_t token = addClientLayer(client, layer);
1304
1305        surfaceHandle = layer->getSurface();
1306        if (surfaceHandle != 0) {
1307            params->token = token;
1308            params->identity = layer->getIdentity();
1309            if (normalLayer != 0) {
1310                Mutex::Autolock _l(mStateLock);
1311                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1312            }
1313        }
1314
1315        setTransactionFlags(eTransactionNeeded);
1316    }
1317
1318    return surfaceHandle;
1319}
1320
1321sp<Layer> SurfaceFlinger::createNormalSurface(
1322        const sp<Client>& client, DisplayID display,
1323        uint32_t w, uint32_t h, uint32_t flags,
1324        PixelFormat& format)
1325{
1326    // initialize the surfaces
1327    switch (format) { // TODO: take h/w into account
1328    case PIXEL_FORMAT_TRANSPARENT:
1329    case PIXEL_FORMAT_TRANSLUCENT:
1330        format = PIXEL_FORMAT_RGBA_8888;
1331        break;
1332    case PIXEL_FORMAT_OPAQUE:
1333#ifdef NO_RGBX_8888
1334        format = PIXEL_FORMAT_RGB_565;
1335#else
1336        format = PIXEL_FORMAT_RGBX_8888;
1337#endif
1338        break;
1339    }
1340
1341#ifdef NO_RGBX_8888
1342    if (format == PIXEL_FORMAT_RGBX_8888)
1343        format = PIXEL_FORMAT_RGBA_8888;
1344#endif
1345
1346    sp<Layer> layer = new Layer(this, display, client);
1347    status_t err = layer->setBuffers(w, h, format, flags);
1348    if (CC_LIKELY(err != NO_ERROR)) {
1349        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1350        layer.clear();
1351    }
1352    return layer;
1353}
1354
1355sp<LayerDim> SurfaceFlinger::createDimSurface(
1356        const sp<Client>& client, DisplayID display,
1357        uint32_t w, uint32_t h, uint32_t flags)
1358{
1359    sp<LayerDim> layer = new LayerDim(this, display, client);
1360    return layer;
1361}
1362
1363sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1364        const sp<Client>& client, DisplayID display,
1365        uint32_t w, uint32_t h, uint32_t flags)
1366{
1367    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1368    return layer;
1369}
1370
1371status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1372{
1373    /*
1374     * called by the window manager, when a surface should be marked for
1375     * destruction.
1376     *
1377     * The surface is removed from the current and drawing lists, but placed
1378     * in the purgatory queue, so it's not destroyed right-away (we need
1379     * to wait for all client's references to go away first).
1380     */
1381
1382    status_t err = NAME_NOT_FOUND;
1383    Mutex::Autolock _l(mStateLock);
1384    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1385    if (layer != 0) {
1386        err = purgatorizeLayer_l(layer);
1387        if (err == NO_ERROR) {
1388            setTransactionFlags(eTransactionNeeded);
1389        }
1390    }
1391    return err;
1392}
1393
1394status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1395{
1396    // called by ~ISurface() when all references are gone
1397    status_t err = NO_ERROR;
1398    sp<LayerBaseClient> l(layer.promote());
1399    if (l != NULL) {
1400        Mutex::Autolock _l(mStateLock);
1401        err = removeLayer_l(l);
1402        if (err == NAME_NOT_FOUND) {
1403            // The surface wasn't in the current list, which means it was
1404            // removed already, which means it is in the purgatory,
1405            // and need to be removed from there.
1406            ssize_t idx = mLayerPurgatory.remove(l);
1407            ALOGE_IF(idx < 0,
1408                    "layer=%p is not in the purgatory list", l.get());
1409        }
1410        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1411                "error removing layer=%p (%s)", l.get(), strerror(-err));
1412    }
1413    return err;
1414}
1415
1416uint32_t SurfaceFlinger::setClientStateLocked(
1417        const sp<Client>& client,
1418        const layer_state_t& s)
1419{
1420    uint32_t flags = 0;
1421    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1422    if (layer != 0) {
1423        const uint32_t what = s.what;
1424        if (what & ePositionChanged) {
1425            if (layer->setPosition(s.x, s.y))
1426                flags |= eTraversalNeeded;
1427        }
1428        if (what & eLayerChanged) {
1429            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1430            if (layer->setLayer(s.z)) {
1431                mCurrentState.layersSortedByZ.removeAt(idx);
1432                mCurrentState.layersSortedByZ.add(layer);
1433                // we need traversal (state changed)
1434                // AND transaction (list changed)
1435                flags |= eTransactionNeeded|eTraversalNeeded;
1436            }
1437        }
1438        if (what & eSizeChanged) {
1439            if (layer->setSize(s.w, s.h)) {
1440                flags |= eTraversalNeeded;
1441            }
1442        }
1443        if (what & eAlphaChanged) {
1444            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1445                flags |= eTraversalNeeded;
1446        }
1447        if (what & eMatrixChanged) {
1448            if (layer->setMatrix(s.matrix))
1449                flags |= eTraversalNeeded;
1450        }
1451        if (what & eTransparentRegionChanged) {
1452            if (layer->setTransparentRegionHint(s.transparentRegion))
1453                flags |= eTraversalNeeded;
1454        }
1455        if (what & eVisibilityChanged) {
1456            if (layer->setFlags(s.flags, s.mask))
1457                flags |= eTraversalNeeded;
1458        }
1459    }
1460    return flags;
1461}
1462
1463void SurfaceFlinger::screenReleased(int dpy)
1464{
1465    // this may be called by a signal handler, we can't do too much in here
1466    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1467    signalTransaction();
1468}
1469
1470void SurfaceFlinger::screenAcquired(int dpy)
1471{
1472    // this may be called by a signal handler, we can't do too much in here
1473    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1474    signalTransaction();
1475}
1476
1477status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1478{
1479    const size_t SIZE = 4096;
1480    char buffer[SIZE];
1481    String8 result;
1482
1483    if (!PermissionCache::checkCallingPermission(sDump)) {
1484        snprintf(buffer, SIZE, "Permission Denial: "
1485                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1486                IPCThreadState::self()->getCallingPid(),
1487                IPCThreadState::self()->getCallingUid());
1488        result.append(buffer);
1489    } else {
1490        // Try to get the main lock, but don't insist if we can't
1491        // (this would indicate SF is stuck, but we want to be able to
1492        // print something in dumpsys).
1493        int retry = 3;
1494        while (mStateLock.tryLock()<0 && --retry>=0) {
1495            usleep(1000000);
1496        }
1497        const bool locked(retry >= 0);
1498        if (!locked) {
1499            snprintf(buffer, SIZE,
1500                    "SurfaceFlinger appears to be unresponsive, "
1501                    "dumping anyways (no locks held)\n");
1502            result.append(buffer);
1503        }
1504
1505        bool dumpAll = true;
1506        size_t index = 0;
1507        size_t numArgs = args.size();
1508        if (numArgs) {
1509            dumpAll = false;
1510
1511            if ((index < numArgs) &&
1512                    (args[index] == String16("--list"))) {
1513                index++;
1514                listLayersLocked(args, index, result, buffer, SIZE);
1515            }
1516
1517            if ((index < numArgs) &&
1518                    (args[index] == String16("--latency"))) {
1519                index++;
1520                dumpStatsLocked(args, index, result, buffer, SIZE);
1521            }
1522
1523            if ((index < numArgs) &&
1524                    (args[index] == String16("--latency-clear"))) {
1525                index++;
1526                clearStatsLocked(args, index, result, buffer, SIZE);
1527            }
1528        }
1529
1530        if (dumpAll) {
1531            dumpAllLocked(result, buffer, SIZE);
1532        }
1533
1534        if (locked) {
1535            mStateLock.unlock();
1536        }
1537    }
1538    write(fd, result.string(), result.size());
1539    return NO_ERROR;
1540}
1541
1542void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1543        String8& result, char* buffer, size_t SIZE) const
1544{
1545    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1546    const size_t count = currentLayers.size();
1547    for (size_t i=0 ; i<count ; i++) {
1548        const sp<LayerBase>& layer(currentLayers[i]);
1549        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1550        result.append(buffer);
1551    }
1552}
1553
1554void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1555        String8& result, char* buffer, size_t SIZE) const
1556{
1557    String8 name;
1558    if (index < args.size()) {
1559        name = String8(args[index]);
1560        index++;
1561    }
1562
1563    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1564    const size_t count = currentLayers.size();
1565    for (size_t i=0 ; i<count ; i++) {
1566        const sp<LayerBase>& layer(currentLayers[i]);
1567        if (name.isEmpty()) {
1568            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1569            result.append(buffer);
1570        }
1571        if (name.isEmpty() || (name == layer->getName())) {
1572            layer->dumpStats(result, buffer, SIZE);
1573        }
1574    }
1575}
1576
1577void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1578        String8& result, char* buffer, size_t SIZE) const
1579{
1580    String8 name;
1581    if (index < args.size()) {
1582        name = String8(args[index]);
1583        index++;
1584    }
1585
1586    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1587    const size_t count = currentLayers.size();
1588    for (size_t i=0 ; i<count ; i++) {
1589        const sp<LayerBase>& layer(currentLayers[i]);
1590        if (name.isEmpty() || (name == layer->getName())) {
1591            layer->clearStats();
1592        }
1593    }
1594}
1595
1596void SurfaceFlinger::dumpAllLocked(
1597        String8& result, char* buffer, size_t SIZE) const
1598{
1599    // figure out if we're stuck somewhere
1600    const nsecs_t now = systemTime();
1601    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1602    const nsecs_t inTransaction(mDebugInTransaction);
1603    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1604    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1605
1606    /*
1607     * Dump the visible layer list
1608     */
1609    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1610    const size_t count = currentLayers.size();
1611    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1612    result.append(buffer);
1613    for (size_t i=0 ; i<count ; i++) {
1614        const sp<LayerBase>& layer(currentLayers[i]);
1615        layer->dump(result, buffer, SIZE);
1616    }
1617
1618    /*
1619     * Dump the layers in the purgatory
1620     */
1621
1622    const size_t purgatorySize = mLayerPurgatory.size();
1623    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1624    result.append(buffer);
1625    for (size_t i=0 ; i<purgatorySize ; i++) {
1626        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1627        layer->shortDump(result, buffer, SIZE);
1628    }
1629
1630    /*
1631     * Dump SurfaceFlinger global state
1632     */
1633
1634    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1635    result.append(buffer);
1636
1637    const GLExtensions& extensions(GLExtensions::getInstance());
1638    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1639            extensions.getVendor(),
1640            extensions.getRenderer(),
1641            extensions.getVersion());
1642    result.append(buffer);
1643
1644    snprintf(buffer, SIZE, "EGL : %s\n",
1645            eglQueryString(graphicPlane(0).getEGLDisplay(),
1646                    EGL_VERSION_HW_ANDROID));
1647    result.append(buffer);
1648
1649    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1650    result.append(buffer);
1651
1652    mWormholeRegion.dump(result, "WormholeRegion");
1653    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1654    snprintf(buffer, SIZE,
1655            "  orientation=%d, canDraw=%d\n",
1656            mCurrentState.orientation, hw.canDraw());
1657    result.append(buffer);
1658    snprintf(buffer, SIZE,
1659            "  last eglSwapBuffers() time: %f us\n"
1660            "  last transaction time     : %f us\n"
1661            "  transaction-flags         : %08x\n"
1662            "  refresh-rate              : %f fps\n"
1663            "  x-dpi                     : %f\n"
1664            "  y-dpi                     : %f\n",
1665            mLastSwapBufferTime/1000.0,
1666            mLastTransactionTime/1000.0,
1667            mTransactionFlags,
1668            hw.getRefreshRate(),
1669            hw.getDpiX(),
1670            hw.getDpiY());
1671    result.append(buffer);
1672
1673    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1674            inSwapBuffersDuration/1000.0);
1675    result.append(buffer);
1676
1677    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1678            inTransactionDuration/1000.0);
1679    result.append(buffer);
1680
1681    /*
1682     * VSYNC state
1683     */
1684    mEventThread->dump(result, buffer, SIZE);
1685
1686    /*
1687     * Dump HWComposer state
1688     */
1689    HWComposer& hwc(hw.getHwComposer());
1690    snprintf(buffer, SIZE, "h/w composer state:\n");
1691    result.append(buffer);
1692    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1693            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1694                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1695    result.append(buffer);
1696    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1697
1698    /*
1699     * Dump gralloc state
1700     */
1701    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1702    alloc.dump(result);
1703    hw.dump(result);
1704}
1705
1706status_t SurfaceFlinger::onTransact(
1707    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1708{
1709    switch (code) {
1710        case CREATE_CONNECTION:
1711        case SET_TRANSACTION_STATE:
1712        case SET_ORIENTATION:
1713        case BOOT_FINISHED:
1714        case TURN_ELECTRON_BEAM_OFF:
1715        case TURN_ELECTRON_BEAM_ON:
1716        {
1717            // codes that require permission check
1718            IPCThreadState* ipc = IPCThreadState::self();
1719            const int pid = ipc->getCallingPid();
1720            const int uid = ipc->getCallingUid();
1721            if ((uid != AID_GRAPHICS) &&
1722                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1723                ALOGE("Permission Denial: "
1724                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1725                return PERMISSION_DENIED;
1726            }
1727            break;
1728        }
1729        case CAPTURE_SCREEN:
1730        {
1731            // codes that require permission check
1732            IPCThreadState* ipc = IPCThreadState::self();
1733            const int pid = ipc->getCallingPid();
1734            const int uid = ipc->getCallingUid();
1735            if ((uid != AID_GRAPHICS) &&
1736                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1737                ALOGE("Permission Denial: "
1738                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1739                return PERMISSION_DENIED;
1740            }
1741            break;
1742        }
1743    }
1744
1745    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1746    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1747        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1748        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1749            IPCThreadState* ipc = IPCThreadState::self();
1750            const int pid = ipc->getCallingPid();
1751            const int uid = ipc->getCallingUid();
1752            ALOGE("Permission Denial: "
1753                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1754            return PERMISSION_DENIED;
1755        }
1756        int n;
1757        switch (code) {
1758            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1759            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1760                return NO_ERROR;
1761            case 1002:  // SHOW_UPDATES
1762                n = data.readInt32();
1763                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1764                invalidateHwcGeometry();
1765                repaintEverything();
1766                return NO_ERROR;
1767            case 1003:  // SHOW_BACKGROUND
1768                n = data.readInt32();
1769                mDebugBackground = n ? 1 : 0;
1770                return NO_ERROR;
1771            case 1004:{ // repaint everything
1772                repaintEverything();
1773                return NO_ERROR;
1774            }
1775            case 1005:{ // force transaction
1776                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1777                return NO_ERROR;
1778            }
1779            case 1008:  // toggle use of hw composer
1780                n = data.readInt32();
1781                mDebugDisableHWC = n ? 1 : 0;
1782                invalidateHwcGeometry();
1783                repaintEverything();
1784                return NO_ERROR;
1785            case 1009:  // toggle use of transform hint
1786                n = data.readInt32();
1787                mDebugDisableTransformHint = n ? 1 : 0;
1788                invalidateHwcGeometry();
1789                repaintEverything();
1790                return NO_ERROR;
1791            case 1010:  // interrogate.
1792                reply->writeInt32(0);
1793                reply->writeInt32(0);
1794                reply->writeInt32(mDebugRegion);
1795                reply->writeInt32(mDebugBackground);
1796                return NO_ERROR;
1797            case 1013: {
1798                Mutex::Autolock _l(mStateLock);
1799                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1800                reply->writeInt32(hw.getPageFlipCount());
1801            }
1802            return NO_ERROR;
1803        }
1804    }
1805    return err;
1806}
1807
1808void SurfaceFlinger::repaintEverything() {
1809    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1810    const Rect bounds(hw.getBounds());
1811    setInvalidateRegion(Region(bounds));
1812    signalTransaction();
1813}
1814
1815void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1816    Mutex::Autolock _l(mInvalidateLock);
1817    mInvalidateRegion = reg;
1818}
1819
1820Region SurfaceFlinger::getAndClearInvalidateRegion() {
1821    Mutex::Autolock _l(mInvalidateLock);
1822    Region reg(mInvalidateRegion);
1823    mInvalidateRegion.clear();
1824    return reg;
1825}
1826
1827// ---------------------------------------------------------------------------
1828
1829status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1830        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1831{
1832    Mutex::Autolock _l(mStateLock);
1833    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1834}
1835
1836status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1837        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1838{
1839    if (!GLExtensions::getInstance().haveFramebufferObject())
1840        return INVALID_OPERATION;
1841
1842    // get screen geometry
1843    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1844    const uint32_t hw_w = hw.getWidth();
1845    const uint32_t hw_h = hw.getHeight();
1846    GLfloat u = 1;
1847    GLfloat v = 1;
1848
1849    // make sure to clear all GL error flags
1850    while ( glGetError() != GL_NO_ERROR ) ;
1851
1852    // create a FBO
1853    GLuint name, tname;
1854    glGenTextures(1, &tname);
1855    glBindTexture(GL_TEXTURE_2D, tname);
1856    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1857            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1858    if (glGetError() != GL_NO_ERROR) {
1859        while ( glGetError() != GL_NO_ERROR ) ;
1860        GLint tw = (2 << (31 - clz(hw_w)));
1861        GLint th = (2 << (31 - clz(hw_h)));
1862        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1863                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1864        u = GLfloat(hw_w) / tw;
1865        v = GLfloat(hw_h) / th;
1866    }
1867    glGenFramebuffersOES(1, &name);
1868    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1869    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1870            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1871
1872    // redraw the screen entirely...
1873    glDisable(GL_TEXTURE_EXTERNAL_OES);
1874    glDisable(GL_TEXTURE_2D);
1875    glDisable(GL_SCISSOR_TEST);
1876    glClearColor(0,0,0,1);
1877    glClear(GL_COLOR_BUFFER_BIT);
1878    glEnable(GL_SCISSOR_TEST);
1879    glMatrixMode(GL_MODELVIEW);
1880    glLoadIdentity();
1881    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1882    const size_t count = layers.size();
1883    for (size_t i=0 ; i<count ; ++i) {
1884        const sp<LayerBase>& layer(layers[i]);
1885        layer->drawForSreenShot();
1886    }
1887
1888    hw.compositionComplete();
1889
1890    // back to main framebuffer
1891    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1892    glDisable(GL_SCISSOR_TEST);
1893    glDeleteFramebuffersOES(1, &name);
1894
1895    *textureName = tname;
1896    *uOut = u;
1897    *vOut = v;
1898    return NO_ERROR;
1899}
1900
1901// ---------------------------------------------------------------------------
1902
1903status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1904{
1905    // get screen geometry
1906    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1907    const uint32_t hw_w = hw.getWidth();
1908    const uint32_t hw_h = hw.getHeight();
1909    const Region screenBounds(hw.getBounds());
1910
1911    GLfloat u, v;
1912    GLuint tname;
1913    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1914    if (result != NO_ERROR) {
1915        return result;
1916    }
1917
1918    GLfloat vtx[8];
1919    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1920    glBindTexture(GL_TEXTURE_2D, tname);
1921    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1922    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1923    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1924    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1925    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1926    glVertexPointer(2, GL_FLOAT, 0, vtx);
1927
1928    /*
1929     * Texture coordinate mapping
1930     *
1931     *                 u
1932     *    1 +----------+---+
1933     *      |     |    |   |  image is inverted
1934     *      |     V    |   |  w.r.t. the texture
1935     *  1-v +----------+   |  coordinates
1936     *      |              |
1937     *      |              |
1938     *      |              |
1939     *    0 +--------------+
1940     *      0              1
1941     *
1942     */
1943
1944    class s_curve_interpolator {
1945        const float nbFrames, s, v;
1946    public:
1947        s_curve_interpolator(int nbFrames, float s)
1948        : nbFrames(1.0f / (nbFrames-1)), s(s),
1949          v(1.0f + expf(-s + 0.5f*s)) {
1950        }
1951        float operator()(int f) {
1952            const float x = f * nbFrames;
1953            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1954        }
1955    };
1956
1957    class v_stretch {
1958        const GLfloat hw_w, hw_h;
1959    public:
1960        v_stretch(uint32_t hw_w, uint32_t hw_h)
1961        : hw_w(hw_w), hw_h(hw_h) {
1962        }
1963        void operator()(GLfloat* vtx, float v) {
1964            const GLfloat w = hw_w + (hw_w * v);
1965            const GLfloat h = hw_h - (hw_h * v);
1966            const GLfloat x = (hw_w - w) * 0.5f;
1967            const GLfloat y = (hw_h - h) * 0.5f;
1968            vtx[0] = x;         vtx[1] = y;
1969            vtx[2] = x;         vtx[3] = y + h;
1970            vtx[4] = x + w;     vtx[5] = y + h;
1971            vtx[6] = x + w;     vtx[7] = y;
1972        }
1973    };
1974
1975    class h_stretch {
1976        const GLfloat hw_w, hw_h;
1977    public:
1978        h_stretch(uint32_t hw_w, uint32_t hw_h)
1979        : hw_w(hw_w), hw_h(hw_h) {
1980        }
1981        void operator()(GLfloat* vtx, float v) {
1982            const GLfloat w = hw_w - (hw_w * v);
1983            const GLfloat h = 1.0f;
1984            const GLfloat x = (hw_w - w) * 0.5f;
1985            const GLfloat y = (hw_h - h) * 0.5f;
1986            vtx[0] = x;         vtx[1] = y;
1987            vtx[2] = x;         vtx[3] = y + h;
1988            vtx[4] = x + w;     vtx[5] = y + h;
1989            vtx[6] = x + w;     vtx[7] = y;
1990        }
1991    };
1992
1993    // the full animation is 24 frames
1994    char value[PROPERTY_VALUE_MAX];
1995    property_get("debug.sf.electron_frames", value, "24");
1996    int nbFrames = (atoi(value) + 1) >> 1;
1997    if (nbFrames <= 0) // just in case
1998        nbFrames = 24;
1999
2000    s_curve_interpolator itr(nbFrames, 7.5f);
2001    s_curve_interpolator itg(nbFrames, 8.0f);
2002    s_curve_interpolator itb(nbFrames, 8.5f);
2003
2004    v_stretch vverts(hw_w, hw_h);
2005
2006    glMatrixMode(GL_TEXTURE);
2007    glLoadIdentity();
2008    glMatrixMode(GL_MODELVIEW);
2009    glLoadIdentity();
2010
2011    glEnable(GL_BLEND);
2012    glBlendFunc(GL_ONE, GL_ONE);
2013    for (int i=0 ; i<nbFrames ; i++) {
2014        float x, y, w, h;
2015        const float vr = itr(i);
2016        const float vg = itg(i);
2017        const float vb = itb(i);
2018
2019        // clear screen
2020        glColorMask(1,1,1,1);
2021        glClear(GL_COLOR_BUFFER_BIT);
2022        glEnable(GL_TEXTURE_2D);
2023
2024        // draw the red plane
2025        vverts(vtx, vr);
2026        glColorMask(1,0,0,1);
2027        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2028
2029        // draw the green plane
2030        vverts(vtx, vg);
2031        glColorMask(0,1,0,1);
2032        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2033
2034        // draw the blue plane
2035        vverts(vtx, vb);
2036        glColorMask(0,0,1,1);
2037        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2038
2039        // draw the white highlight (we use the last vertices)
2040        glDisable(GL_TEXTURE_2D);
2041        glColorMask(1,1,1,1);
2042        glColor4f(vg, vg, vg, 1);
2043        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2044        hw.flip(screenBounds);
2045    }
2046
2047    h_stretch hverts(hw_w, hw_h);
2048    glDisable(GL_BLEND);
2049    glDisable(GL_TEXTURE_2D);
2050    glColorMask(1,1,1,1);
2051    for (int i=0 ; i<nbFrames ; i++) {
2052        const float v = itg(i);
2053        hverts(vtx, v);
2054        glClear(GL_COLOR_BUFFER_BIT);
2055        glColor4f(1-v, 1-v, 1-v, 1);
2056        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2057        hw.flip(screenBounds);
2058    }
2059
2060    glColorMask(1,1,1,1);
2061    glEnable(GL_SCISSOR_TEST);
2062    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2063    glDeleteTextures(1, &tname);
2064    glDisable(GL_TEXTURE_2D);
2065    glDisable(GL_BLEND);
2066    return NO_ERROR;
2067}
2068
2069status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2070{
2071    status_t result = PERMISSION_DENIED;
2072
2073    if (!GLExtensions::getInstance().haveFramebufferObject())
2074        return INVALID_OPERATION;
2075
2076
2077    // get screen geometry
2078    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2079    const uint32_t hw_w = hw.getWidth();
2080    const uint32_t hw_h = hw.getHeight();
2081    const Region screenBounds(hw.bounds());
2082
2083    GLfloat u, v;
2084    GLuint tname;
2085    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2086    if (result != NO_ERROR) {
2087        return result;
2088    }
2089
2090    GLfloat vtx[8];
2091    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2092    glBindTexture(GL_TEXTURE_2D, tname);
2093    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2094    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2095    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2096    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2097    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2098    glVertexPointer(2, GL_FLOAT, 0, vtx);
2099
2100    class s_curve_interpolator {
2101        const float nbFrames, s, v;
2102    public:
2103        s_curve_interpolator(int nbFrames, float s)
2104        : nbFrames(1.0f / (nbFrames-1)), s(s),
2105          v(1.0f + expf(-s + 0.5f*s)) {
2106        }
2107        float operator()(int f) {
2108            const float x = f * nbFrames;
2109            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2110        }
2111    };
2112
2113    class v_stretch {
2114        const GLfloat hw_w, hw_h;
2115    public:
2116        v_stretch(uint32_t hw_w, uint32_t hw_h)
2117        : hw_w(hw_w), hw_h(hw_h) {
2118        }
2119        void operator()(GLfloat* vtx, float v) {
2120            const GLfloat w = hw_w + (hw_w * v);
2121            const GLfloat h = hw_h - (hw_h * v);
2122            const GLfloat x = (hw_w - w) * 0.5f;
2123            const GLfloat y = (hw_h - h) * 0.5f;
2124            vtx[0] = x;         vtx[1] = y;
2125            vtx[2] = x;         vtx[3] = y + h;
2126            vtx[4] = x + w;     vtx[5] = y + h;
2127            vtx[6] = x + w;     vtx[7] = y;
2128        }
2129    };
2130
2131    class h_stretch {
2132        const GLfloat hw_w, hw_h;
2133    public:
2134        h_stretch(uint32_t hw_w, uint32_t hw_h)
2135        : hw_w(hw_w), hw_h(hw_h) {
2136        }
2137        void operator()(GLfloat* vtx, float v) {
2138            const GLfloat w = hw_w - (hw_w * v);
2139            const GLfloat h = 1.0f;
2140            const GLfloat x = (hw_w - w) * 0.5f;
2141            const GLfloat y = (hw_h - h) * 0.5f;
2142            vtx[0] = x;         vtx[1] = y;
2143            vtx[2] = x;         vtx[3] = y + h;
2144            vtx[4] = x + w;     vtx[5] = y + h;
2145            vtx[6] = x + w;     vtx[7] = y;
2146        }
2147    };
2148
2149    // the full animation is 12 frames
2150    int nbFrames = 8;
2151    s_curve_interpolator itr(nbFrames, 7.5f);
2152    s_curve_interpolator itg(nbFrames, 8.0f);
2153    s_curve_interpolator itb(nbFrames, 8.5f);
2154
2155    h_stretch hverts(hw_w, hw_h);
2156    glDisable(GL_BLEND);
2157    glDisable(GL_TEXTURE_2D);
2158    glColorMask(1,1,1,1);
2159    for (int i=nbFrames-1 ; i>=0 ; i--) {
2160        const float v = itg(i);
2161        hverts(vtx, v);
2162        glClear(GL_COLOR_BUFFER_BIT);
2163        glColor4f(1-v, 1-v, 1-v, 1);
2164        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2165        hw.flip(screenBounds);
2166    }
2167
2168    nbFrames = 4;
2169    v_stretch vverts(hw_w, hw_h);
2170    glEnable(GL_BLEND);
2171    glBlendFunc(GL_ONE, GL_ONE);
2172    for (int i=nbFrames-1 ; i>=0 ; i--) {
2173        float x, y, w, h;
2174        const float vr = itr(i);
2175        const float vg = itg(i);
2176        const float vb = itb(i);
2177
2178        // clear screen
2179        glColorMask(1,1,1,1);
2180        glClear(GL_COLOR_BUFFER_BIT);
2181        glEnable(GL_TEXTURE_2D);
2182
2183        // draw the red plane
2184        vverts(vtx, vr);
2185        glColorMask(1,0,0,1);
2186        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2187
2188        // draw the green plane
2189        vverts(vtx, vg);
2190        glColorMask(0,1,0,1);
2191        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2192
2193        // draw the blue plane
2194        vverts(vtx, vb);
2195        glColorMask(0,0,1,1);
2196        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2197
2198        hw.flip(screenBounds);
2199    }
2200
2201    glColorMask(1,1,1,1);
2202    glEnable(GL_SCISSOR_TEST);
2203    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2204    glDeleteTextures(1, &tname);
2205    glDisable(GL_TEXTURE_2D);
2206    glDisable(GL_BLEND);
2207
2208    return NO_ERROR;
2209}
2210
2211// ---------------------------------------------------------------------------
2212
2213status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2214{
2215    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2216    if (!hw.canDraw()) {
2217        // we're already off
2218        return NO_ERROR;
2219    }
2220
2221    // turn off hwc while we're doing the animation
2222    hw.getHwComposer().disable();
2223    // and make sure to turn it back on (if needed) next time we compose
2224    invalidateHwcGeometry();
2225
2226    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2227        electronBeamOffAnimationImplLocked();
2228    }
2229
2230    // always clear the whole screen at the end of the animation
2231    glClearColor(0,0,0,1);
2232    glDisable(GL_SCISSOR_TEST);
2233    glClear(GL_COLOR_BUFFER_BIT);
2234    glEnable(GL_SCISSOR_TEST);
2235    hw.flip( Region(hw.bounds()) );
2236
2237    return NO_ERROR;
2238}
2239
2240status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2241{
2242    class MessageTurnElectronBeamOff : public MessageBase {
2243        SurfaceFlinger* flinger;
2244        int32_t mode;
2245        status_t result;
2246    public:
2247        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2248            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2249        }
2250        status_t getResult() const {
2251            return result;
2252        }
2253        virtual bool handler() {
2254            Mutex::Autolock _l(flinger->mStateLock);
2255            result = flinger->turnElectronBeamOffImplLocked(mode);
2256            return true;
2257        }
2258    };
2259
2260    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2261    status_t res = postMessageSync(msg);
2262    if (res == NO_ERROR) {
2263        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2264
2265        // work-around: when the power-manager calls us we activate the
2266        // animation. eventually, the "on" animation will be called
2267        // by the power-manager itself
2268        mElectronBeamAnimationMode = mode;
2269    }
2270    return res;
2271}
2272
2273// ---------------------------------------------------------------------------
2274
2275status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2276{
2277    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2278    if (hw.canDraw()) {
2279        // we're already on
2280        return NO_ERROR;
2281    }
2282    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2283        electronBeamOnAnimationImplLocked();
2284    }
2285
2286    // make sure to redraw the whole screen when the animation is done
2287    mDirtyRegion.set(hw.bounds());
2288    signalTransaction();
2289
2290    return NO_ERROR;
2291}
2292
2293status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2294{
2295    class MessageTurnElectronBeamOn : public MessageBase {
2296        SurfaceFlinger* flinger;
2297        int32_t mode;
2298        status_t result;
2299    public:
2300        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2301            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2302        }
2303        status_t getResult() const {
2304            return result;
2305        }
2306        virtual bool handler() {
2307            Mutex::Autolock _l(flinger->mStateLock);
2308            result = flinger->turnElectronBeamOnImplLocked(mode);
2309            return true;
2310        }
2311    };
2312
2313    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2314    return NO_ERROR;
2315}
2316
2317// ---------------------------------------------------------------------------
2318
2319status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2320        sp<IMemoryHeap>* heap,
2321        uint32_t* w, uint32_t* h, PixelFormat* f,
2322        uint32_t sw, uint32_t sh,
2323        uint32_t minLayerZ, uint32_t maxLayerZ)
2324{
2325    status_t result = PERMISSION_DENIED;
2326
2327    // only one display supported for now
2328    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2329        return BAD_VALUE;
2330
2331    if (!GLExtensions::getInstance().haveFramebufferObject())
2332        return INVALID_OPERATION;
2333
2334    // get screen geometry
2335    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2336    const uint32_t hw_w = hw.getWidth();
2337    const uint32_t hw_h = hw.getHeight();
2338
2339    if ((sw > hw_w) || (sh > hw_h))
2340        return BAD_VALUE;
2341
2342    sw = (!sw) ? hw_w : sw;
2343    sh = (!sh) ? hw_h : sh;
2344    const size_t size = sw * sh * 4;
2345
2346    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2347    //        sw, sh, minLayerZ, maxLayerZ);
2348
2349    // make sure to clear all GL error flags
2350    while ( glGetError() != GL_NO_ERROR ) ;
2351
2352    // create a FBO
2353    GLuint name, tname;
2354    glGenRenderbuffersOES(1, &tname);
2355    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2356    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2357    glGenFramebuffersOES(1, &name);
2358    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2359    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2360            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2361
2362    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2363
2364    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2365
2366        // invert everything, b/c glReadPixel() below will invert the FB
2367        glViewport(0, 0, sw, sh);
2368        glScissor(0, 0, sw, sh);
2369        glEnable(GL_SCISSOR_TEST);
2370        glMatrixMode(GL_PROJECTION);
2371        glPushMatrix();
2372        glLoadIdentity();
2373        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2374        glMatrixMode(GL_MODELVIEW);
2375
2376        // redraw the screen entirely...
2377        glClearColor(0,0,0,1);
2378        glClear(GL_COLOR_BUFFER_BIT);
2379
2380        const LayerVector& layers(mDrawingState.layersSortedByZ);
2381        const size_t count = layers.size();
2382        for (size_t i=0 ; i<count ; ++i) {
2383            const sp<LayerBase>& layer(layers[i]);
2384            const uint32_t flags = layer->drawingState().flags;
2385            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2386                const uint32_t z = layer->drawingState().z;
2387                if (z >= minLayerZ && z <= maxLayerZ) {
2388                    layer->drawForSreenShot();
2389                }
2390            }
2391        }
2392
2393        // XXX: this is needed on tegra
2394        glEnable(GL_SCISSOR_TEST);
2395        glScissor(0, 0, sw, sh);
2396
2397        // check for errors and return screen capture
2398        if (glGetError() != GL_NO_ERROR) {
2399            // error while rendering
2400            result = INVALID_OPERATION;
2401        } else {
2402            // allocate shared memory large enough to hold the
2403            // screen capture
2404            sp<MemoryHeapBase> base(
2405                    new MemoryHeapBase(size, 0, "screen-capture") );
2406            void* const ptr = base->getBase();
2407            if (ptr) {
2408                // capture the screen with glReadPixels()
2409                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2410                if (glGetError() == GL_NO_ERROR) {
2411                    *heap = base;
2412                    *w = sw;
2413                    *h = sh;
2414                    *f = PIXEL_FORMAT_RGBA_8888;
2415                    result = NO_ERROR;
2416                }
2417            } else {
2418                result = NO_MEMORY;
2419            }
2420        }
2421        glEnable(GL_SCISSOR_TEST);
2422        glViewport(0, 0, hw_w, hw_h);
2423        glMatrixMode(GL_PROJECTION);
2424        glPopMatrix();
2425        glMatrixMode(GL_MODELVIEW);
2426    } else {
2427        result = BAD_VALUE;
2428    }
2429
2430    // release FBO resources
2431    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2432    glDeleteRenderbuffersOES(1, &tname);
2433    glDeleteFramebuffersOES(1, &name);
2434
2435    hw.compositionComplete();
2436
2437    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2438
2439    return result;
2440}
2441
2442
2443status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2444        sp<IMemoryHeap>* heap,
2445        uint32_t* width, uint32_t* height, PixelFormat* format,
2446        uint32_t sw, uint32_t sh,
2447        uint32_t minLayerZ, uint32_t maxLayerZ)
2448{
2449    // only one display supported for now
2450    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2451        return BAD_VALUE;
2452
2453    if (!GLExtensions::getInstance().haveFramebufferObject())
2454        return INVALID_OPERATION;
2455
2456    class MessageCaptureScreen : public MessageBase {
2457        SurfaceFlinger* flinger;
2458        DisplayID dpy;
2459        sp<IMemoryHeap>* heap;
2460        uint32_t* w;
2461        uint32_t* h;
2462        PixelFormat* f;
2463        uint32_t sw;
2464        uint32_t sh;
2465        uint32_t minLayerZ;
2466        uint32_t maxLayerZ;
2467        status_t result;
2468    public:
2469        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2470                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2471                uint32_t sw, uint32_t sh,
2472                uint32_t minLayerZ, uint32_t maxLayerZ)
2473            : flinger(flinger), dpy(dpy),
2474              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2475              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2476              result(PERMISSION_DENIED)
2477        {
2478        }
2479        status_t getResult() const {
2480            return result;
2481        }
2482        virtual bool handler() {
2483            Mutex::Autolock _l(flinger->mStateLock);
2484
2485            // if we have secure windows, never allow the screen capture
2486            if (flinger->mSecureFrameBuffer)
2487                return true;
2488
2489            result = flinger->captureScreenImplLocked(dpy,
2490                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2491
2492            return true;
2493        }
2494    };
2495
2496    sp<MessageBase> msg = new MessageCaptureScreen(this,
2497            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2498    status_t res = postMessageSync(msg);
2499    if (res == NO_ERROR) {
2500        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2501    }
2502    return res;
2503}
2504
2505// ---------------------------------------------------------------------------
2506
2507sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2508{
2509    sp<Layer> result;
2510    Mutex::Autolock _l(mStateLock);
2511    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2512    return result;
2513}
2514
2515// ---------------------------------------------------------------------------
2516
2517Client::Client(const sp<SurfaceFlinger>& flinger)
2518    : mFlinger(flinger), mNameGenerator(1)
2519{
2520}
2521
2522Client::~Client()
2523{
2524    const size_t count = mLayers.size();
2525    for (size_t i=0 ; i<count ; i++) {
2526        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2527        if (layer != 0) {
2528            mFlinger->removeLayer(layer);
2529        }
2530    }
2531}
2532
2533status_t Client::initCheck() const {
2534    return NO_ERROR;
2535}
2536
2537size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2538{
2539    Mutex::Autolock _l(mLock);
2540    size_t name = mNameGenerator++;
2541    mLayers.add(name, layer);
2542    return name;
2543}
2544
2545void Client::detachLayer(const LayerBaseClient* layer)
2546{
2547    Mutex::Autolock _l(mLock);
2548    // we do a linear search here, because this doesn't happen often
2549    const size_t count = mLayers.size();
2550    for (size_t i=0 ; i<count ; i++) {
2551        if (mLayers.valueAt(i) == layer) {
2552            mLayers.removeItemsAt(i, 1);
2553            break;
2554        }
2555    }
2556}
2557sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2558{
2559    Mutex::Autolock _l(mLock);
2560    sp<LayerBaseClient> lbc;
2561    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2562    if (layer != 0) {
2563        lbc = layer.promote();
2564        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2565    }
2566    return lbc;
2567}
2568
2569
2570status_t Client::onTransact(
2571    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2572{
2573    // these must be checked
2574     IPCThreadState* ipc = IPCThreadState::self();
2575     const int pid = ipc->getCallingPid();
2576     const int uid = ipc->getCallingUid();
2577     const int self_pid = getpid();
2578     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2579         // we're called from a different process, do the real check
2580         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2581         {
2582             ALOGE("Permission Denial: "
2583                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2584             return PERMISSION_DENIED;
2585         }
2586     }
2587     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2588}
2589
2590
2591sp<ISurface> Client::createSurface(
2592        ISurfaceComposerClient::surface_data_t* params,
2593        const String8& name,
2594        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2595        uint32_t flags)
2596{
2597    /*
2598     * createSurface must be called from the GL thread so that it can
2599     * have access to the GL context.
2600     */
2601
2602    class MessageCreateSurface : public MessageBase {
2603        sp<ISurface> result;
2604        SurfaceFlinger* flinger;
2605        ISurfaceComposerClient::surface_data_t* params;
2606        Client* client;
2607        const String8& name;
2608        DisplayID display;
2609        uint32_t w, h;
2610        PixelFormat format;
2611        uint32_t flags;
2612    public:
2613        MessageCreateSurface(SurfaceFlinger* flinger,
2614                ISurfaceComposerClient::surface_data_t* params,
2615                const String8& name, Client* client,
2616                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2617                uint32_t flags)
2618            : flinger(flinger), params(params), client(client), name(name),
2619              display(display), w(w), h(h), format(format), flags(flags)
2620        {
2621        }
2622        sp<ISurface> getResult() const { return result; }
2623        virtual bool handler() {
2624            result = flinger->createSurface(params, name, client,
2625                    display, w, h, format, flags);
2626            return true;
2627        }
2628    };
2629
2630    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2631            params, name, this, display, w, h, format, flags);
2632    mFlinger->postMessageSync(msg);
2633    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2634}
2635status_t Client::destroySurface(SurfaceID sid) {
2636    return mFlinger->removeSurface(this, sid);
2637}
2638
2639// ---------------------------------------------------------------------------
2640
2641GraphicBufferAlloc::GraphicBufferAlloc() {}
2642
2643GraphicBufferAlloc::~GraphicBufferAlloc() {}
2644
2645sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2646        PixelFormat format, uint32_t usage, status_t* error) {
2647    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2648    status_t err = graphicBuffer->initCheck();
2649    *error = err;
2650    if (err != 0 || graphicBuffer->handle == 0) {
2651        if (err == NO_MEMORY) {
2652            GraphicBuffer::dumpAllocationsToSystemLog();
2653        }
2654        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2655             "failed (%s), handle=%p",
2656                w, h, strerror(-err), graphicBuffer->handle);
2657        return 0;
2658    }
2659    return graphicBuffer;
2660}
2661
2662// ---------------------------------------------------------------------------
2663
2664GraphicPlane::GraphicPlane()
2665    : mHw(0)
2666{
2667}
2668
2669GraphicPlane::~GraphicPlane() {
2670    delete mHw;
2671}
2672
2673bool GraphicPlane::initialized() const {
2674    return mHw ? true : false;
2675}
2676
2677int GraphicPlane::getWidth() const {
2678    return mWidth;
2679}
2680
2681int GraphicPlane::getHeight() const {
2682    return mHeight;
2683}
2684
2685void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2686{
2687    mHw = hw;
2688
2689    // initialize the display orientation transform.
2690    // it's a constant that should come from the display driver.
2691    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2692    char property[PROPERTY_VALUE_MAX];
2693    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2694        //displayOrientation
2695        switch (atoi(property)) {
2696        case 90:
2697            displayOrientation = ISurfaceComposer::eOrientation90;
2698            break;
2699        case 270:
2700            displayOrientation = ISurfaceComposer::eOrientation270;
2701            break;
2702        }
2703    }
2704
2705    const float w = hw->getWidth();
2706    const float h = hw->getHeight();
2707    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2708            &mDisplayTransform);
2709    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2710        mDisplayWidth = h;
2711        mDisplayHeight = w;
2712    } else {
2713        mDisplayWidth = w;
2714        mDisplayHeight = h;
2715    }
2716
2717    setOrientation(ISurfaceComposer::eOrientationDefault);
2718}
2719
2720status_t GraphicPlane::orientationToTransfrom(
2721        int orientation, int w, int h, Transform* tr)
2722{
2723    uint32_t flags = 0;
2724    switch (orientation) {
2725    case ISurfaceComposer::eOrientationDefault:
2726        flags = Transform::ROT_0;
2727        break;
2728    case ISurfaceComposer::eOrientation90:
2729        flags = Transform::ROT_90;
2730        break;
2731    case ISurfaceComposer::eOrientation180:
2732        flags = Transform::ROT_180;
2733        break;
2734    case ISurfaceComposer::eOrientation270:
2735        flags = Transform::ROT_270;
2736        break;
2737    default:
2738        return BAD_VALUE;
2739    }
2740    tr->set(flags, w, h);
2741    return NO_ERROR;
2742}
2743
2744status_t GraphicPlane::setOrientation(int orientation)
2745{
2746    // If the rotation can be handled in hardware, this is where
2747    // the magic should happen.
2748
2749    const DisplayHardware& hw(displayHardware());
2750    const float w = mDisplayWidth;
2751    const float h = mDisplayHeight;
2752    mWidth = int(w);
2753    mHeight = int(h);
2754
2755    Transform orientationTransform;
2756    GraphicPlane::orientationToTransfrom(orientation, w, h,
2757            &orientationTransform);
2758    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2759        mWidth = int(h);
2760        mHeight = int(w);
2761    }
2762
2763    mOrientation = orientation;
2764    mGlobalTransform = mDisplayTransform * orientationTransform;
2765    return NO_ERROR;
2766}
2767
2768const DisplayHardware& GraphicPlane::displayHardware() const {
2769    return *mHw;
2770}
2771
2772DisplayHardware& GraphicPlane::editDisplayHardware() {
2773    return *mHw;
2774}
2775
2776const Transform& GraphicPlane::transform() const {
2777    return mGlobalTransform;
2778}
2779
2780EGLDisplay GraphicPlane::getEGLDisplay() const {
2781    return mHw->getEGLDisplay();
2782}
2783
2784// ---------------------------------------------------------------------------
2785
2786}; // namespace android
2787