SurfaceFlinger.cpp revision 841cde55549cea7a344a1705b18d57a0c6c8ec45 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <stdint.h>
22#include <unistd.h>
23#include <fcntl.h>
24#include <errno.h>
25#include <math.h>
26#include <limits.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/ioctl.h>
30
31#include <cutils/log.h>
32#include <cutils/properties.h>
33
34#include <binder/IPCThreadState.h>
35#include <binder/IServiceManager.h>
36#include <binder/MemoryHeapBase.h>
37#include <binder/PermissionCache.h>
38
39#include <gui/IDisplayEventConnection.h>
40
41#include <utils/String8.h>
42#include <utils/String16.h>
43#include <utils/StopWatch.h>
44#include <utils/Trace.h>
45
46#include <ui/GraphicBufferAllocator.h>
47#include <ui/PixelFormat.h>
48
49#include <GLES/gl.h>
50
51#include "clz.h"
52#include "DdmConnection.h"
53#include "DisplayEventConnection.h"
54#include "EventThread.h"
55#include "GLExtensions.h"
56#include "Layer.h"
57#include "LayerDim.h"
58#include "LayerScreenshot.h"
59#include "SurfaceFlinger.h"
60
61#include "DisplayHardware/DisplayHardware.h"
62#include "DisplayHardware/HWComposer.h"
63
64#include <private/android_filesystem_config.h>
65#include <private/gui/SharedBufferStack.h>
66
67#define EGL_VERSION_HW_ANDROID  0x3143
68
69#define DISPLAY_COUNT       1
70
71namespace android {
72// ---------------------------------------------------------------------------
73
74const String16 sHardwareTest("android.permission.HARDWARE_TEST");
75const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
76const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
77const String16 sDump("android.permission.DUMP");
78
79// ---------------------------------------------------------------------------
80
81SurfaceFlinger::SurfaceFlinger()
82    :   BnSurfaceComposer(), Thread(false),
83        mTransactionFlags(0),
84        mTransationPending(false),
85        mLayersRemoved(false),
86        mBootTime(systemTime()),
87        mVisibleRegionsDirty(false),
88        mHwWorkListDirty(false),
89        mElectronBeamAnimationMode(0),
90        mDebugRegion(0),
91        mDebugBackground(0),
92        mDebugDDMS(0),
93        mDebugDisableHWC(0),
94        mDebugDisableTransformHint(0),
95        mDebugInSwapBuffers(0),
96        mLastSwapBufferTime(0),
97        mDebugInTransaction(0),
98        mLastTransactionTime(0),
99        mBootFinished(false),
100        mConsoleSignals(0),
101        mSecureFrameBuffer(0)
102{
103    init();
104}
105
106void SurfaceFlinger::init()
107{
108    ALOGI("SurfaceFlinger is starting");
109
110    // debugging stuff...
111    char value[PROPERTY_VALUE_MAX];
112
113    property_get("debug.sf.showupdates", value, "0");
114    mDebugRegion = atoi(value);
115
116    property_get("debug.sf.showbackground", value, "0");
117    mDebugBackground = atoi(value);
118
119    property_get("debug.sf.ddms", value, "0");
120    mDebugDDMS = atoi(value);
121    if (mDebugDDMS) {
122        DdmConnection::start(getServiceName());
123    }
124
125    ALOGI_IF(mDebugRegion,       "showupdates enabled");
126    ALOGI_IF(mDebugBackground,   "showbackground enabled");
127    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
128}
129
130void SurfaceFlinger::onFirstRef()
131{
132    mEventQueue.init(this);
133
134    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
135
136    // Wait for the main thread to be done with its initialization
137    mReadyToRunBarrier.wait();
138}
139
140
141SurfaceFlinger::~SurfaceFlinger()
142{
143    glDeleteTextures(1, &mWormholeTexName);
144}
145
146void SurfaceFlinger::binderDied(const wp<IBinder>& who)
147{
148    // the window manager died on us. prepare its eulogy.
149
150    // reset screen orientation
151    Vector<ComposerState> state;
152    setTransactionState(state, eOrientationDefault, 0);
153
154    // restart the boot-animation
155    property_set("ctl.start", "bootanim");
156}
157
158sp<IMemoryHeap> SurfaceFlinger::getCblk() const
159{
160    return mServerHeap;
161}
162
163sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
164{
165    sp<ISurfaceComposerClient> bclient;
166    sp<Client> client(new Client(this));
167    status_t err = client->initCheck();
168    if (err == NO_ERROR) {
169        bclient = client;
170    }
171    return bclient;
172}
173
174sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
175{
176    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
177    return gba;
178}
179
180const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
181{
182    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
183    const GraphicPlane& plane(mGraphicPlanes[dpy]);
184    return plane;
185}
186
187GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
188{
189    return const_cast<GraphicPlane&>(
190        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
191}
192
193void SurfaceFlinger::bootFinished()
194{
195    const nsecs_t now = systemTime();
196    const nsecs_t duration = now - mBootTime;
197    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
198    mBootFinished = true;
199
200    // wait patiently for the window manager death
201    const String16 name("window");
202    sp<IBinder> window(defaultServiceManager()->getService(name));
203    if (window != 0) {
204        window->linkToDeath(this);
205    }
206
207    // stop boot animation
208    property_set("ctl.stop", "bootanim");
209}
210
211static inline uint16_t pack565(int r, int g, int b) {
212    return (r<<11)|(g<<5)|b;
213}
214
215status_t SurfaceFlinger::readyToRun()
216{
217    ALOGI(   "SurfaceFlinger's main thread ready to run. "
218            "Initializing graphics H/W...");
219
220    // we only support one display currently
221    int dpy = 0;
222
223    {
224        // initialize the main display
225        GraphicPlane& plane(graphicPlane(dpy));
226        DisplayHardware* const hw = new DisplayHardware(this, dpy);
227        plane.setDisplayHardware(hw);
228    }
229
230    // create the shared control-block
231    mServerHeap = new MemoryHeapBase(4096,
232            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
233    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
234
235    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
236    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
237
238    new(mServerCblk) surface_flinger_cblk_t;
239
240    // initialize primary screen
241    // (other display should be initialized in the same manner, but
242    // asynchronously, as they could come and go. None of this is supported
243    // yet).
244    const GraphicPlane& plane(graphicPlane(dpy));
245    const DisplayHardware& hw = plane.displayHardware();
246    const uint32_t w = hw.getWidth();
247    const uint32_t h = hw.getHeight();
248    const uint32_t f = hw.getFormat();
249    hw.makeCurrent();
250
251    // initialize the shared control block
252    mServerCblk->connected |= 1<<dpy;
253    display_cblk_t* dcblk = mServerCblk->displays + dpy;
254    memset(dcblk, 0, sizeof(display_cblk_t));
255    dcblk->w            = plane.getWidth();
256    dcblk->h            = plane.getHeight();
257    dcblk->format       = f;
258    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
259    dcblk->xdpi         = hw.getDpiX();
260    dcblk->ydpi         = hw.getDpiY();
261    dcblk->fps          = hw.getRefreshRate();
262    dcblk->density      = hw.getDensity();
263
264    // Initialize OpenGL|ES
265    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
266    glPixelStorei(GL_PACK_ALIGNMENT, 4);
267    glEnableClientState(GL_VERTEX_ARRAY);
268    glEnable(GL_SCISSOR_TEST);
269    glShadeModel(GL_FLAT);
270    glDisable(GL_DITHER);
271    glDisable(GL_CULL_FACE);
272
273    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
274    const uint16_t g1 = pack565(0x17,0x2f,0x17);
275    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
276    glGenTextures(1, &mWormholeTexName);
277    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
278    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
282    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
283            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
284
285    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
286    glGenTextures(1, &mProtectedTexName);
287    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
288    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
292    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
293            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
294
295    glViewport(0, 0, w, h);
296    glMatrixMode(GL_PROJECTION);
297    glLoadIdentity();
298    // put the origin in the left-bottom corner
299    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
300
301
302    // start the EventThread
303    mEventThread = new EventThread(this);
304    mEventQueue.setEventThread(mEventThread);
305    hw.startSleepManagement();
306
307    /*
308     *  We're now ready to accept clients...
309     */
310
311    mReadyToRunBarrier.open();
312
313    // start boot animation
314    property_set("ctl.start", "bootanim");
315
316    return NO_ERROR;
317}
318
319// ----------------------------------------------------------------------------
320
321bool SurfaceFlinger::authenticateSurfaceTexture(
322        const sp<ISurfaceTexture>& surfaceTexture) const {
323    Mutex::Autolock _l(mStateLock);
324    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
325
326    // Check the visible layer list for the ISurface
327    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
328    size_t count = currentLayers.size();
329    for (size_t i=0 ; i<count ; i++) {
330        const sp<LayerBase>& layer(currentLayers[i]);
331        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
332        if (lbc != NULL) {
333            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
334            if (lbcBinder == surfaceTextureBinder) {
335                return true;
336            }
337        }
338    }
339
340    // Check the layers in the purgatory.  This check is here so that if a
341    // SurfaceTexture gets destroyed before all the clients are done using it,
342    // the error will not be reported as "surface XYZ is not authenticated", but
343    // will instead fail later on when the client tries to use the surface,
344    // which should be reported as "surface XYZ returned an -ENODEV".  The
345    // purgatorized layers are no less authentic than the visible ones, so this
346    // should not cause any harm.
347    size_t purgatorySize =  mLayerPurgatory.size();
348    for (size_t i=0 ; i<purgatorySize ; i++) {
349        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
350        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
351        if (lbc != NULL) {
352            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
353            if (lbcBinder == surfaceTextureBinder) {
354                return true;
355            }
356        }
357    }
358
359    return false;
360}
361
362// ----------------------------------------------------------------------------
363
364sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
365    return mEventThread->createEventConnection();
366}
367
368// ----------------------------------------------------------------------------
369
370void SurfaceFlinger::waitForEvent() {
371    mEventQueue.waitMessage();
372}
373
374void SurfaceFlinger::signalTransaction() {
375    mEventQueue.invalidate();
376}
377
378void SurfaceFlinger::signalLayerUpdate() {
379    mEventQueue.invalidate();
380}
381
382void SurfaceFlinger::signalRefresh() {
383    mEventQueue.refresh();
384}
385
386status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
387        nsecs_t reltime, uint32_t flags) {
388    return mEventQueue.postMessage(msg, reltime);
389}
390
391status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
392        nsecs_t reltime, uint32_t flags) {
393    status_t res = mEventQueue.postMessage(msg, reltime);
394    if (res == NO_ERROR) {
395        msg->wait();
396    }
397    return res;
398}
399
400bool SurfaceFlinger::threadLoop()
401{
402    waitForEvent();
403    return true;
404}
405
406void SurfaceFlinger::onMessageReceived(int32_t what)
407{
408    ATRACE_CALL();
409    switch (what) {
410        case MessageQueue::REFRESH: {
411//        case MessageQueue::INVALIDATE: {
412            // check for transactions
413            if (CC_UNLIKELY(mConsoleSignals)) {
414                handleConsoleEvents();
415            }
416
417            // if we're in a global transaction, don't do anything.
418            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
419            uint32_t transactionFlags = peekTransactionFlags(mask);
420            if (CC_UNLIKELY(transactionFlags)) {
421                handleTransaction(transactionFlags);
422            }
423
424            // post surfaces (if needed)
425            handlePageFlip();
426
427//            signalRefresh();
428//
429//        } break;
430//
431//        case MessageQueue::REFRESH: {
432
433            handleRefresh();
434
435            const DisplayHardware& hw(graphicPlane(0).displayHardware());
436
437//            if (mDirtyRegion.isEmpty()) {
438//                return;
439//            }
440
441            if (CC_UNLIKELY(mHwWorkListDirty)) {
442                // build the h/w work list
443                handleWorkList();
444            }
445
446            if (CC_LIKELY(hw.canDraw())) {
447                // repaint the framebuffer (if needed)
448                handleRepaint();
449                // inform the h/w that we're done compositing
450                hw.compositionComplete();
451                postFramebuffer();
452            } else {
453                // pretend we did the post
454                hw.compositionComplete();
455            }
456
457        } break;
458    }
459}
460
461void SurfaceFlinger::postFramebuffer()
462{
463    ATRACE_CALL();
464    // mSwapRegion can be empty here is some cases, for instance if a hidden
465    // or fully transparent window is updating.
466    // in that case, we need to flip anyways to not risk a deadlock with
467    // h/w composer.
468
469    const DisplayHardware& hw(graphicPlane(0).displayHardware());
470    const nsecs_t now = systemTime();
471    mDebugInSwapBuffers = now;
472    hw.flip(mSwapRegion);
473
474    size_t numLayers = mVisibleLayersSortedByZ.size();
475    for (size_t i = 0; i < numLayers; i++) {
476        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
477    }
478
479    mLastSwapBufferTime = systemTime() - now;
480    mDebugInSwapBuffers = 0;
481    mSwapRegion.clear();
482}
483
484void SurfaceFlinger::handleConsoleEvents()
485{
486    // something to do with the console
487    const DisplayHardware& hw = graphicPlane(0).displayHardware();
488
489    int what = android_atomic_and(0, &mConsoleSignals);
490    if (what & eConsoleAcquired) {
491        hw.acquireScreen();
492        // this is a temporary work-around, eventually this should be called
493        // by the power-manager
494        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
495    }
496
497    if (what & eConsoleReleased) {
498        if (hw.isScreenAcquired()) {
499            hw.releaseScreen();
500        }
501    }
502
503    mDirtyRegion.set(hw.bounds());
504}
505
506void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
507{
508    ATRACE_CALL();
509
510    Mutex::Autolock _l(mStateLock);
511    const nsecs_t now = systemTime();
512    mDebugInTransaction = now;
513
514    // Here we're guaranteed that some transaction flags are set
515    // so we can call handleTransactionLocked() unconditionally.
516    // We call getTransactionFlags(), which will also clear the flags,
517    // with mStateLock held to guarantee that mCurrentState won't change
518    // until the transaction is committed.
519
520    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
521    transactionFlags = getTransactionFlags(mask);
522    handleTransactionLocked(transactionFlags);
523
524    mLastTransactionTime = systemTime() - now;
525    mDebugInTransaction = 0;
526    invalidateHwcGeometry();
527    // here the transaction has been committed
528}
529
530void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
531{
532    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
533    const size_t count = currentLayers.size();
534
535    /*
536     * Traversal of the children
537     * (perform the transaction for each of them if needed)
538     */
539
540    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
541    if (layersNeedTransaction) {
542        for (size_t i=0 ; i<count ; i++) {
543            const sp<LayerBase>& layer = currentLayers[i];
544            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
545            if (!trFlags) continue;
546
547            const uint32_t flags = layer->doTransaction(0);
548            if (flags & Layer::eVisibleRegion)
549                mVisibleRegionsDirty = true;
550        }
551    }
552
553    /*
554     * Perform our own transaction if needed
555     */
556
557    if (transactionFlags & eTransactionNeeded) {
558        if (mCurrentState.orientation != mDrawingState.orientation) {
559            // the orientation has changed, recompute all visible regions
560            // and invalidate everything.
561
562            const int dpy = 0;
563            const int orientation = mCurrentState.orientation;
564            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
565            GraphicPlane& plane(graphicPlane(dpy));
566            plane.setOrientation(orientation);
567
568            // update the shared control block
569            const DisplayHardware& hw(plane.displayHardware());
570            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
571            dcblk->orientation = orientation;
572            dcblk->w = plane.getWidth();
573            dcblk->h = plane.getHeight();
574
575            mVisibleRegionsDirty = true;
576            mDirtyRegion.set(hw.bounds());
577        }
578
579        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
580            // layers have been added
581            mVisibleRegionsDirty = true;
582        }
583
584        // some layers might have been removed, so
585        // we need to update the regions they're exposing.
586        if (mLayersRemoved) {
587            mLayersRemoved = false;
588            mVisibleRegionsDirty = true;
589            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
590            const size_t count = previousLayers.size();
591            for (size_t i=0 ; i<count ; i++) {
592                const sp<LayerBase>& layer(previousLayers[i]);
593                if (currentLayers.indexOf( layer ) < 0) {
594                    // this layer is not visible anymore
595                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
596                }
597            }
598        }
599    }
600
601    commitTransaction();
602}
603
604void SurfaceFlinger::computeVisibleRegions(
605    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
606{
607    ATRACE_CALL();
608
609    const GraphicPlane& plane(graphicPlane(0));
610    const Transform& planeTransform(plane.transform());
611    const DisplayHardware& hw(plane.displayHardware());
612    const Region screenRegion(hw.bounds());
613
614    Region aboveOpaqueLayers;
615    Region aboveCoveredLayers;
616    Region dirty;
617
618    bool secureFrameBuffer = false;
619
620    size_t i = currentLayers.size();
621    while (i--) {
622        const sp<LayerBase>& layer = currentLayers[i];
623        layer->validateVisibility(planeTransform);
624
625        // start with the whole surface at its current location
626        const Layer::State& s(layer->drawingState());
627
628        /*
629         * opaqueRegion: area of a surface that is fully opaque.
630         */
631        Region opaqueRegion;
632
633        /*
634         * visibleRegion: area of a surface that is visible on screen
635         * and not fully transparent. This is essentially the layer's
636         * footprint minus the opaque regions above it.
637         * Areas covered by a translucent surface are considered visible.
638         */
639        Region visibleRegion;
640
641        /*
642         * coveredRegion: area of a surface that is covered by all
643         * visible regions above it (which includes the translucent areas).
644         */
645        Region coveredRegion;
646
647
648        // handle hidden surfaces by setting the visible region to empty
649        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
650            const bool translucent = !layer->isOpaque();
651            const Rect bounds(layer->visibleBounds());
652            visibleRegion.set(bounds);
653            visibleRegion.andSelf(screenRegion);
654            if (!visibleRegion.isEmpty()) {
655                // Remove the transparent area from the visible region
656                if (translucent) {
657                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
658                }
659
660                // compute the opaque region
661                const int32_t layerOrientation = layer->getOrientation();
662                if (s.alpha==255 && !translucent &&
663                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
664                    // the opaque region is the layer's footprint
665                    opaqueRegion = visibleRegion;
666                }
667            }
668        }
669
670        // Clip the covered region to the visible region
671        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
672
673        // Update aboveCoveredLayers for next (lower) layer
674        aboveCoveredLayers.orSelf(visibleRegion);
675
676        // subtract the opaque region covered by the layers above us
677        visibleRegion.subtractSelf(aboveOpaqueLayers);
678
679        // compute this layer's dirty region
680        if (layer->contentDirty) {
681            // we need to invalidate the whole region
682            dirty = visibleRegion;
683            // as well, as the old visible region
684            dirty.orSelf(layer->visibleRegionScreen);
685            layer->contentDirty = false;
686        } else {
687            /* compute the exposed region:
688             *   the exposed region consists of two components:
689             *   1) what's VISIBLE now and was COVERED before
690             *   2) what's EXPOSED now less what was EXPOSED before
691             *
692             * note that (1) is conservative, we start with the whole
693             * visible region but only keep what used to be covered by
694             * something -- which mean it may have been exposed.
695             *
696             * (2) handles areas that were not covered by anything but got
697             * exposed because of a resize.
698             */
699            const Region newExposed = visibleRegion - coveredRegion;
700            const Region oldVisibleRegion = layer->visibleRegionScreen;
701            const Region oldCoveredRegion = layer->coveredRegionScreen;
702            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
703            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
704        }
705        dirty.subtractSelf(aboveOpaqueLayers);
706
707        // accumulate to the screen dirty region
708        dirtyRegion.orSelf(dirty);
709
710        // Update aboveOpaqueLayers for next (lower) layer
711        aboveOpaqueLayers.orSelf(opaqueRegion);
712
713        // Store the visible region is screen space
714        layer->setVisibleRegion(visibleRegion);
715        layer->setCoveredRegion(coveredRegion);
716
717        // If a secure layer is partially visible, lock-down the screen!
718        if (layer->isSecure() && !visibleRegion.isEmpty()) {
719            secureFrameBuffer = true;
720        }
721    }
722
723    // invalidate the areas where a layer was removed
724    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
725    mDirtyRegionRemovedLayer.clear();
726
727    mSecureFrameBuffer = secureFrameBuffer;
728    opaqueRegion = aboveOpaqueLayers;
729}
730
731
732void SurfaceFlinger::commitTransaction()
733{
734    if (!mLayersPendingRemoval.isEmpty()) {
735        // Notify removed layers now that they can't be drawn from
736        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
737            mLayersPendingRemoval[i]->onRemoved();
738        }
739        mLayersPendingRemoval.clear();
740    }
741
742    mDrawingState = mCurrentState;
743    mTransationPending = false;
744    mTransactionCV.broadcast();
745}
746
747void SurfaceFlinger::handlePageFlip()
748{
749    ATRACE_CALL();
750    const DisplayHardware& hw = graphicPlane(0).displayHardware();
751    const Region screenRegion(hw.bounds());
752
753    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
754    const bool visibleRegions = lockPageFlip(currentLayers);
755
756        if (visibleRegions || mVisibleRegionsDirty) {
757            Region opaqueRegion;
758            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
759
760            /*
761             *  rebuild the visible layer list
762             */
763            const size_t count = currentLayers.size();
764            mVisibleLayersSortedByZ.clear();
765            mVisibleLayersSortedByZ.setCapacity(count);
766            for (size_t i=0 ; i<count ; i++) {
767                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
768                    mVisibleLayersSortedByZ.add(currentLayers[i]);
769            }
770
771            mWormholeRegion = screenRegion.subtract(opaqueRegion);
772            mVisibleRegionsDirty = false;
773            invalidateHwcGeometry();
774        }
775
776    unlockPageFlip(currentLayers);
777
778    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
779    mDirtyRegion.andSelf(screenRegion);
780}
781
782void SurfaceFlinger::invalidateHwcGeometry()
783{
784    mHwWorkListDirty = true;
785}
786
787bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
788{
789    bool recomputeVisibleRegions = false;
790    size_t count = currentLayers.size();
791    sp<LayerBase> const* layers = currentLayers.array();
792    for (size_t i=0 ; i<count ; i++) {
793        const sp<LayerBase>& layer(layers[i]);
794        layer->lockPageFlip(recomputeVisibleRegions);
795    }
796    return recomputeVisibleRegions;
797}
798
799void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
800{
801    const GraphicPlane& plane(graphicPlane(0));
802    const Transform& planeTransform(plane.transform());
803    const size_t count = currentLayers.size();
804    sp<LayerBase> const* layers = currentLayers.array();
805    for (size_t i=0 ; i<count ; i++) {
806        const sp<LayerBase>& layer(layers[i]);
807        layer->unlockPageFlip(planeTransform, mDirtyRegion);
808    }
809}
810
811void SurfaceFlinger::handleRefresh()
812{
813    bool needInvalidate = false;
814    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
815    const size_t count = currentLayers.size();
816    for (size_t i=0 ; i<count ; i++) {
817        const sp<LayerBase>& layer(currentLayers[i]);
818        if (layer->onPreComposition()) {
819            needInvalidate = true;
820        }
821    }
822    if (needInvalidate) {
823        signalLayerUpdate();
824    }
825}
826
827
828void SurfaceFlinger::handleWorkList()
829{
830    mHwWorkListDirty = false;
831    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
832    if (hwc.initCheck() == NO_ERROR) {
833        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
834        const size_t count = currentLayers.size();
835        hwc.createWorkList(count);
836        hwc_layer_t* const cur(hwc.getLayers());
837        for (size_t i=0 ; cur && i<count ; i++) {
838            currentLayers[i]->setGeometry(&cur[i]);
839            if (mDebugDisableHWC || mDebugRegion) {
840                cur[i].compositionType = HWC_FRAMEBUFFER;
841                cur[i].flags |= HWC_SKIP_LAYER;
842            }
843        }
844    }
845}
846
847void SurfaceFlinger::handleRepaint()
848{
849    ATRACE_CALL();
850
851    // compute the invalid region
852    mSwapRegion.orSelf(mDirtyRegion);
853
854    if (CC_UNLIKELY(mDebugRegion)) {
855        debugFlashRegions();
856    }
857
858    // set the frame buffer
859    const DisplayHardware& hw(graphicPlane(0).displayHardware());
860    glMatrixMode(GL_MODELVIEW);
861    glLoadIdentity();
862
863    uint32_t flags = hw.getFlags();
864    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
865        (flags & DisplayHardware::BUFFER_PRESERVED))
866    {
867        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
868        // takes a rectangle, we must make sure to update that whole
869        // rectangle in that case
870        if (flags & DisplayHardware::SWAP_RECTANGLE) {
871            // TODO: we really should be able to pass a region to
872            // SWAP_RECTANGLE so that we don't have to redraw all this.
873            mDirtyRegion.set(mSwapRegion.bounds());
874        } else {
875            // in the BUFFER_PRESERVED case, obviously, we can update only
876            // what's needed and nothing more.
877            // NOTE: this is NOT a common case, as preserving the backbuffer
878            // is costly and usually involves copying the whole update back.
879        }
880    } else {
881        if (flags & DisplayHardware::PARTIAL_UPDATES) {
882            // We need to redraw the rectangle that will be updated
883            // (pushed to the framebuffer).
884            // This is needed because PARTIAL_UPDATES only takes one
885            // rectangle instead of a region (see DisplayHardware::flip())
886            mDirtyRegion.set(mSwapRegion.bounds());
887        } else {
888            // we need to redraw everything (the whole screen)
889            mDirtyRegion.set(hw.bounds());
890            mSwapRegion = mDirtyRegion;
891        }
892    }
893
894    setupHardwareComposer(mDirtyRegion);
895    composeSurfaces(mDirtyRegion);
896
897    // update the swap region and clear the dirty region
898    mSwapRegion.orSelf(mDirtyRegion);
899    mDirtyRegion.clear();
900}
901
902void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
903{
904    const DisplayHardware& hw(graphicPlane(0).displayHardware());
905    HWComposer& hwc(hw.getHwComposer());
906    hwc_layer_t* const cur(hwc.getLayers());
907    if (!cur) {
908        return;
909    }
910
911    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
912    size_t count = layers.size();
913
914    ALOGE_IF(hwc.getNumLayers() != count,
915            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
916            hwc.getNumLayers(), count);
917
918    // just to be extra-safe, use the smallest count
919    if (hwc.initCheck() == NO_ERROR) {
920        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
921    }
922
923    /*
924     *  update the per-frame h/w composer data for each layer
925     *  and build the transparent region of the FB
926     */
927    for (size_t i=0 ; i<count ; i++) {
928        const sp<LayerBase>& layer(layers[i]);
929        layer->setPerFrameData(&cur[i]);
930    }
931    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
932    status_t err = hwc.prepare();
933    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
934
935    if (err == NO_ERROR) {
936        // what's happening here is tricky.
937        // we want to clear all the layers with the CLEAR_FB flags
938        // that are opaque.
939        // however, since some GPU are efficient at preserving
940        // the backbuffer, we want to take advantage of that so we do the
941        // clear only in the dirty region (other areas will be preserved
942        // on those GPUs).
943        //   NOTE: on non backbuffer preserving GPU, the dirty region
944        //   has already been expanded as needed, so the code is correct
945        //   there too.
946        //
947        // However, the content of the framebuffer cannot be trusted when
948        // we switch to/from FB/OVERLAY, in which case we need to
949        // expand the dirty region to those areas too.
950        //
951        // Note also that there is a special case when switching from
952        // "no layers in FB" to "some layers in FB", where we need to redraw
953        // the entire FB, since some areas might contain uninitialized
954        // data.
955        //
956        // Also we want to make sure to not clear areas that belong to
957        // layers above that won't redraw (we would just be erasing them),
958        // that is, we can't erase anything outside the dirty region.
959
960        Region transparent;
961
962        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
963            transparent.set(hw.getBounds());
964            dirtyInOut = transparent;
965        } else {
966            for (size_t i=0 ; i<count ; i++) {
967                const sp<LayerBase>& layer(layers[i]);
968                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
969                    transparent.orSelf(layer->visibleRegionScreen);
970                }
971                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
972                if (isOverlay != layer->isOverlay()) {
973                    // we transitioned to/from overlay, so add this layer
974                    // to the dirty region so the framebuffer can be either
975                    // cleared or redrawn.
976                    dirtyInOut.orSelf(layer->visibleRegionScreen);
977                }
978                layer->setOverlay(isOverlay);
979            }
980            // don't erase stuff outside the dirty region
981            transparent.andSelf(dirtyInOut);
982        }
983
984        /*
985         *  clear the area of the FB that need to be transparent
986         */
987        if (!transparent.isEmpty()) {
988            glClearColor(0,0,0,0);
989            Region::const_iterator it = transparent.begin();
990            Region::const_iterator const end = transparent.end();
991            const int32_t height = hw.getHeight();
992            while (it != end) {
993                const Rect& r(*it++);
994                const GLint sy = height - (r.top + r.height());
995                glScissor(r.left, sy, r.width(), r.height());
996                glClear(GL_COLOR_BUFFER_BIT);
997            }
998        }
999    }
1000}
1001
1002void SurfaceFlinger::composeSurfaces(const Region& dirty)
1003{
1004    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1005    HWComposer& hwc(hw.getHwComposer());
1006
1007    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
1008    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
1009        // should never happen unless the window manager has a bug
1010        // draw something...
1011        drawWormhole();
1012    }
1013
1014    // FIXME: workaroud for b/6020860
1015    glEnable(GL_SCISSOR_TEST);
1016    glScissor(0,0,0,0);
1017    glClear(GL_COLOR_BUFFER_BIT);
1018    // end-workaround
1019
1020    /*
1021     * and then, render the layers targeted at the framebuffer
1022     */
1023    hwc_layer_t* const cur(hwc.getLayers());
1024    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1025    size_t count = layers.size();
1026    for (size_t i=0 ; i<count ; i++) {
1027        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1028            continue;
1029        }
1030        const sp<LayerBase>& layer(layers[i]);
1031        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1032        if (!clip.isEmpty()) {
1033            layer->draw(clip);
1034        }
1035    }
1036}
1037
1038void SurfaceFlinger::debugFlashRegions()
1039{
1040    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1041    const uint32_t flags = hw.getFlags();
1042    const int32_t height = hw.getHeight();
1043    if (mSwapRegion.isEmpty()) {
1044        return;
1045    }
1046
1047    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1048            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1049        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1050                mDirtyRegion.bounds() : hw.bounds());
1051        composeSurfaces(repaint);
1052    }
1053
1054    glDisable(GL_TEXTURE_EXTERNAL_OES);
1055    glDisable(GL_TEXTURE_2D);
1056    glDisable(GL_BLEND);
1057    glDisable(GL_SCISSOR_TEST);
1058
1059    static int toggle = 0;
1060    toggle = 1 - toggle;
1061    if (toggle) {
1062        glColor4f(1, 0, 1, 1);
1063    } else {
1064        glColor4f(1, 1, 0, 1);
1065    }
1066
1067    Region::const_iterator it = mDirtyRegion.begin();
1068    Region::const_iterator const end = mDirtyRegion.end();
1069    while (it != end) {
1070        const Rect& r = *it++;
1071        GLfloat vertices[][2] = {
1072                { r.left,  height - r.top },
1073                { r.left,  height - r.bottom },
1074                { r.right, height - r.bottom },
1075                { r.right, height - r.top }
1076        };
1077        glVertexPointer(2, GL_FLOAT, 0, vertices);
1078        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1079    }
1080
1081    hw.flip(mSwapRegion);
1082
1083    if (mDebugRegion > 1)
1084        usleep(mDebugRegion * 1000);
1085
1086    glEnable(GL_SCISSOR_TEST);
1087}
1088
1089void SurfaceFlinger::drawWormhole() const
1090{
1091    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1092    if (region.isEmpty())
1093        return;
1094
1095    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1096    const int32_t width = hw.getWidth();
1097    const int32_t height = hw.getHeight();
1098
1099    if (CC_LIKELY(!mDebugBackground)) {
1100        glClearColor(0,0,0,0);
1101        Region::const_iterator it = region.begin();
1102        Region::const_iterator const end = region.end();
1103        while (it != end) {
1104            const Rect& r = *it++;
1105            const GLint sy = height - (r.top + r.height());
1106            glScissor(r.left, sy, r.width(), r.height());
1107            glClear(GL_COLOR_BUFFER_BIT);
1108        }
1109    } else {
1110        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1111                { width, height }, { 0, height }  };
1112        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1113
1114        glVertexPointer(2, GL_SHORT, 0, vertices);
1115        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1116        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1117
1118        glDisable(GL_TEXTURE_EXTERNAL_OES);
1119        glEnable(GL_TEXTURE_2D);
1120        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1121        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1122        glMatrixMode(GL_TEXTURE);
1123        glLoadIdentity();
1124
1125        glDisable(GL_BLEND);
1126
1127        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1128        Region::const_iterator it = region.begin();
1129        Region::const_iterator const end = region.end();
1130        while (it != end) {
1131            const Rect& r = *it++;
1132            const GLint sy = height - (r.top + r.height());
1133            glScissor(r.left, sy, r.width(), r.height());
1134            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1135        }
1136        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1137        glDisable(GL_TEXTURE_2D);
1138        glLoadIdentity();
1139        glMatrixMode(GL_MODELVIEW);
1140    }
1141}
1142
1143status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1144{
1145    Mutex::Autolock _l(mStateLock);
1146    addLayer_l(layer);
1147    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1148    return NO_ERROR;
1149}
1150
1151status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1152{
1153    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1154    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1155}
1156
1157ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1158        const sp<LayerBaseClient>& lbc)
1159{
1160    // attach this layer to the client
1161    size_t name = client->attachLayer(lbc);
1162
1163    Mutex::Autolock _l(mStateLock);
1164
1165    // add this layer to the current state list
1166    addLayer_l(lbc);
1167
1168    return ssize_t(name);
1169}
1170
1171status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1172{
1173    Mutex::Autolock _l(mStateLock);
1174    status_t err = purgatorizeLayer_l(layer);
1175    if (err == NO_ERROR)
1176        setTransactionFlags(eTransactionNeeded);
1177    return err;
1178}
1179
1180status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1181{
1182    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1183    if (lbc != 0) {
1184        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1185    }
1186    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1187    if (index >= 0) {
1188        mLayersRemoved = true;
1189        return NO_ERROR;
1190    }
1191    return status_t(index);
1192}
1193
1194status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1195{
1196    // First add the layer to the purgatory list, which makes sure it won't
1197    // go away, then remove it from the main list (through a transaction).
1198    ssize_t err = removeLayer_l(layerBase);
1199    if (err >= 0) {
1200        mLayerPurgatory.add(layerBase);
1201    }
1202
1203    mLayersPendingRemoval.push(layerBase);
1204
1205    // it's possible that we don't find a layer, because it might
1206    // have been destroyed already -- this is not technically an error
1207    // from the user because there is a race between Client::destroySurface(),
1208    // ~Client() and ~ISurface().
1209    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1210}
1211
1212status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1213{
1214    layer->forceVisibilityTransaction();
1215    setTransactionFlags(eTraversalNeeded);
1216    return NO_ERROR;
1217}
1218
1219uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1220{
1221    return android_atomic_release_load(&mTransactionFlags);
1222}
1223
1224uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1225{
1226    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1227}
1228
1229uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1230{
1231    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1232    if ((old & flags)==0) { // wake the server up
1233        signalTransaction();
1234    }
1235    return old;
1236}
1237
1238
1239void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1240        int orientation, uint32_t flags) {
1241    Mutex::Autolock _l(mStateLock);
1242
1243    uint32_t transactionFlags = 0;
1244    if (mCurrentState.orientation != orientation) {
1245        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1246            mCurrentState.orientation = orientation;
1247            transactionFlags |= eTransactionNeeded;
1248        } else if (orientation != eOrientationUnchanged) {
1249            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1250                    orientation);
1251        }
1252    }
1253
1254    const size_t count = state.size();
1255    for (size_t i=0 ; i<count ; i++) {
1256        const ComposerState& s(state[i]);
1257        sp<Client> client( static_cast<Client *>(s.client.get()) );
1258        transactionFlags |= setClientStateLocked(client, s.state);
1259    }
1260
1261    if (transactionFlags) {
1262        // this triggers the transaction
1263        setTransactionFlags(transactionFlags);
1264
1265        // if this is a synchronous transaction, wait for it to take effect
1266        // before returning.
1267        if (flags & eSynchronous) {
1268            mTransationPending = true;
1269        }
1270        while (mTransationPending) {
1271            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1272            if (CC_UNLIKELY(err != NO_ERROR)) {
1273                // just in case something goes wrong in SF, return to the
1274                // called after a few seconds.
1275                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1276                mTransationPending = false;
1277                break;
1278            }
1279        }
1280    }
1281}
1282
1283sp<ISurface> SurfaceFlinger::createSurface(
1284        ISurfaceComposerClient::surface_data_t* params,
1285        const String8& name,
1286        const sp<Client>& client,
1287        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1288        uint32_t flags)
1289{
1290    sp<LayerBaseClient> layer;
1291    sp<ISurface> surfaceHandle;
1292
1293    if (int32_t(w|h) < 0) {
1294        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1295                int(w), int(h));
1296        return surfaceHandle;
1297    }
1298
1299    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1300    sp<Layer> normalLayer;
1301    switch (flags & eFXSurfaceMask) {
1302        case eFXSurfaceNormal:
1303            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1304            layer = normalLayer;
1305            break;
1306        case eFXSurfaceBlur:
1307            // for now we treat Blur as Dim, until we can implement it
1308            // efficiently.
1309        case eFXSurfaceDim:
1310            layer = createDimSurface(client, d, w, h, flags);
1311            break;
1312        case eFXSurfaceScreenshot:
1313            layer = createScreenshotSurface(client, d, w, h, flags);
1314            break;
1315    }
1316
1317    if (layer != 0) {
1318        layer->initStates(w, h, flags);
1319        layer->setName(name);
1320        ssize_t token = addClientLayer(client, layer);
1321
1322        surfaceHandle = layer->getSurface();
1323        if (surfaceHandle != 0) {
1324            params->token = token;
1325            params->identity = layer->getIdentity();
1326            if (normalLayer != 0) {
1327                Mutex::Autolock _l(mStateLock);
1328                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1329            }
1330        }
1331
1332        setTransactionFlags(eTransactionNeeded);
1333    }
1334
1335    return surfaceHandle;
1336}
1337
1338sp<Layer> SurfaceFlinger::createNormalSurface(
1339        const sp<Client>& client, DisplayID display,
1340        uint32_t w, uint32_t h, uint32_t flags,
1341        PixelFormat& format)
1342{
1343    // initialize the surfaces
1344    switch (format) { // TODO: take h/w into account
1345    case PIXEL_FORMAT_TRANSPARENT:
1346    case PIXEL_FORMAT_TRANSLUCENT:
1347        format = PIXEL_FORMAT_RGBA_8888;
1348        break;
1349    case PIXEL_FORMAT_OPAQUE:
1350#ifdef NO_RGBX_8888
1351        format = PIXEL_FORMAT_RGB_565;
1352#else
1353        format = PIXEL_FORMAT_RGBX_8888;
1354#endif
1355        break;
1356    }
1357
1358#ifdef NO_RGBX_8888
1359    if (format == PIXEL_FORMAT_RGBX_8888)
1360        format = PIXEL_FORMAT_RGBA_8888;
1361#endif
1362
1363    sp<Layer> layer = new Layer(this, display, client);
1364    status_t err = layer->setBuffers(w, h, format, flags);
1365    if (CC_LIKELY(err != NO_ERROR)) {
1366        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1367        layer.clear();
1368    }
1369    return layer;
1370}
1371
1372sp<LayerDim> SurfaceFlinger::createDimSurface(
1373        const sp<Client>& client, DisplayID display,
1374        uint32_t w, uint32_t h, uint32_t flags)
1375{
1376    sp<LayerDim> layer = new LayerDim(this, display, client);
1377    return layer;
1378}
1379
1380sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1381        const sp<Client>& client, DisplayID display,
1382        uint32_t w, uint32_t h, uint32_t flags)
1383{
1384    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1385    return layer;
1386}
1387
1388status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1389{
1390    /*
1391     * called by the window manager, when a surface should be marked for
1392     * destruction.
1393     *
1394     * The surface is removed from the current and drawing lists, but placed
1395     * in the purgatory queue, so it's not destroyed right-away (we need
1396     * to wait for all client's references to go away first).
1397     */
1398
1399    status_t err = NAME_NOT_FOUND;
1400    Mutex::Autolock _l(mStateLock);
1401    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1402    if (layer != 0) {
1403        err = purgatorizeLayer_l(layer);
1404        if (err == NO_ERROR) {
1405            setTransactionFlags(eTransactionNeeded);
1406        }
1407    }
1408    return err;
1409}
1410
1411status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1412{
1413    // called by ~ISurface() when all references are gone
1414    status_t err = NO_ERROR;
1415    sp<LayerBaseClient> l(layer.promote());
1416    if (l != NULL) {
1417        Mutex::Autolock _l(mStateLock);
1418        err = removeLayer_l(l);
1419        if (err == NAME_NOT_FOUND) {
1420            // The surface wasn't in the current list, which means it was
1421            // removed already, which means it is in the purgatory,
1422            // and need to be removed from there.
1423            ssize_t idx = mLayerPurgatory.remove(l);
1424            ALOGE_IF(idx < 0,
1425                    "layer=%p is not in the purgatory list", l.get());
1426        }
1427        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1428                "error removing layer=%p (%s)", l.get(), strerror(-err));
1429    }
1430    return err;
1431}
1432
1433uint32_t SurfaceFlinger::setClientStateLocked(
1434        const sp<Client>& client,
1435        const layer_state_t& s)
1436{
1437    uint32_t flags = 0;
1438    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1439    if (layer != 0) {
1440        const uint32_t what = s.what;
1441        if (what & ePositionChanged) {
1442            if (layer->setPosition(s.x, s.y))
1443                flags |= eTraversalNeeded;
1444        }
1445        if (what & eLayerChanged) {
1446            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1447            if (layer->setLayer(s.z)) {
1448                mCurrentState.layersSortedByZ.removeAt(idx);
1449                mCurrentState.layersSortedByZ.add(layer);
1450                // we need traversal (state changed)
1451                // AND transaction (list changed)
1452                flags |= eTransactionNeeded|eTraversalNeeded;
1453            }
1454        }
1455        if (what & eSizeChanged) {
1456            if (layer->setSize(s.w, s.h)) {
1457                flags |= eTraversalNeeded;
1458            }
1459        }
1460        if (what & eAlphaChanged) {
1461            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1462                flags |= eTraversalNeeded;
1463        }
1464        if (what & eMatrixChanged) {
1465            if (layer->setMatrix(s.matrix))
1466                flags |= eTraversalNeeded;
1467        }
1468        if (what & eTransparentRegionChanged) {
1469            if (layer->setTransparentRegionHint(s.transparentRegion))
1470                flags |= eTraversalNeeded;
1471        }
1472        if (what & eVisibilityChanged) {
1473            if (layer->setFlags(s.flags, s.mask))
1474                flags |= eTraversalNeeded;
1475        }
1476    }
1477    return flags;
1478}
1479
1480void SurfaceFlinger::screenReleased(int dpy)
1481{
1482    // this may be called by a signal handler, we can't do too much in here
1483    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1484    signalTransaction();
1485}
1486
1487void SurfaceFlinger::screenAcquired(int dpy)
1488{
1489    // this may be called by a signal handler, we can't do too much in here
1490    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1491    signalTransaction();
1492}
1493
1494status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1495{
1496    const size_t SIZE = 4096;
1497    char buffer[SIZE];
1498    String8 result;
1499
1500    if (!PermissionCache::checkCallingPermission(sDump)) {
1501        snprintf(buffer, SIZE, "Permission Denial: "
1502                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1503                IPCThreadState::self()->getCallingPid(),
1504                IPCThreadState::self()->getCallingUid());
1505        result.append(buffer);
1506    } else {
1507        // Try to get the main lock, but don't insist if we can't
1508        // (this would indicate SF is stuck, but we want to be able to
1509        // print something in dumpsys).
1510        int retry = 3;
1511        while (mStateLock.tryLock()<0 && --retry>=0) {
1512            usleep(1000000);
1513        }
1514        const bool locked(retry >= 0);
1515        if (!locked) {
1516            snprintf(buffer, SIZE,
1517                    "SurfaceFlinger appears to be unresponsive, "
1518                    "dumping anyways (no locks held)\n");
1519            result.append(buffer);
1520        }
1521
1522        bool dumpAll = true;
1523        size_t index = 0;
1524        size_t numArgs = args.size();
1525        if (numArgs) {
1526            dumpAll = false;
1527
1528            if ((index < numArgs) &&
1529                    (args[index] == String16("--list"))) {
1530                index++;
1531                listLayersLocked(args, index, result, buffer, SIZE);
1532            }
1533
1534            if ((index < numArgs) &&
1535                    (args[index] == String16("--latency"))) {
1536                index++;
1537                dumpStatsLocked(args, index, result, buffer, SIZE);
1538            }
1539
1540            if ((index < numArgs) &&
1541                    (args[index] == String16("--latency-clear"))) {
1542                index++;
1543                clearStatsLocked(args, index, result, buffer, SIZE);
1544            }
1545        }
1546
1547        if (dumpAll) {
1548            dumpAllLocked(result, buffer, SIZE);
1549        }
1550
1551        if (locked) {
1552            mStateLock.unlock();
1553        }
1554    }
1555    write(fd, result.string(), result.size());
1556    return NO_ERROR;
1557}
1558
1559void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1560        String8& result, char* buffer, size_t SIZE) const
1561{
1562    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1563    const size_t count = currentLayers.size();
1564    for (size_t i=0 ; i<count ; i++) {
1565        const sp<LayerBase>& layer(currentLayers[i]);
1566        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1567        result.append(buffer);
1568    }
1569}
1570
1571void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1572        String8& result, char* buffer, size_t SIZE) const
1573{
1574    String8 name;
1575    if (index < args.size()) {
1576        name = String8(args[index]);
1577        index++;
1578    }
1579
1580    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1581    const size_t count = currentLayers.size();
1582    for (size_t i=0 ; i<count ; i++) {
1583        const sp<LayerBase>& layer(currentLayers[i]);
1584        if (name.isEmpty()) {
1585            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1586            result.append(buffer);
1587        }
1588        if (name.isEmpty() || (name == layer->getName())) {
1589            layer->dumpStats(result, buffer, SIZE);
1590        }
1591    }
1592}
1593
1594void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1595        String8& result, char* buffer, size_t SIZE) const
1596{
1597    String8 name;
1598    if (index < args.size()) {
1599        name = String8(args[index]);
1600        index++;
1601    }
1602
1603    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1604    const size_t count = currentLayers.size();
1605    for (size_t i=0 ; i<count ; i++) {
1606        const sp<LayerBase>& layer(currentLayers[i]);
1607        if (name.isEmpty() || (name == layer->getName())) {
1608            layer->clearStats();
1609        }
1610    }
1611}
1612
1613void SurfaceFlinger::dumpAllLocked(
1614        String8& result, char* buffer, size_t SIZE) const
1615{
1616    // figure out if we're stuck somewhere
1617    const nsecs_t now = systemTime();
1618    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1619    const nsecs_t inTransaction(mDebugInTransaction);
1620    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1621    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1622
1623    /*
1624     * Dump the visible layer list
1625     */
1626    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1627    const size_t count = currentLayers.size();
1628    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1629    result.append(buffer);
1630    for (size_t i=0 ; i<count ; i++) {
1631        const sp<LayerBase>& layer(currentLayers[i]);
1632        layer->dump(result, buffer, SIZE);
1633    }
1634
1635    /*
1636     * Dump the layers in the purgatory
1637     */
1638
1639    const size_t purgatorySize = mLayerPurgatory.size();
1640    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1641    result.append(buffer);
1642    for (size_t i=0 ; i<purgatorySize ; i++) {
1643        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1644        layer->shortDump(result, buffer, SIZE);
1645    }
1646
1647    /*
1648     * Dump SurfaceFlinger global state
1649     */
1650
1651    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1652    result.append(buffer);
1653
1654    const GLExtensions& extensions(GLExtensions::getInstance());
1655    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1656            extensions.getVendor(),
1657            extensions.getRenderer(),
1658            extensions.getVersion());
1659    result.append(buffer);
1660
1661    snprintf(buffer, SIZE, "EGL : %s\n",
1662            eglQueryString(graphicPlane(0).getEGLDisplay(),
1663                    EGL_VERSION_HW_ANDROID));
1664    result.append(buffer);
1665
1666    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1667    result.append(buffer);
1668
1669    mWormholeRegion.dump(result, "WormholeRegion");
1670    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1671    snprintf(buffer, SIZE,
1672            "  orientation=%d, canDraw=%d\n",
1673            mCurrentState.orientation, hw.canDraw());
1674    result.append(buffer);
1675    snprintf(buffer, SIZE,
1676            "  last eglSwapBuffers() time: %f us\n"
1677            "  last transaction time     : %f us\n"
1678            "  transaction-flags         : %08x\n"
1679            "  refresh-rate              : %f fps\n"
1680            "  x-dpi                     : %f\n"
1681            "  y-dpi                     : %f\n",
1682            mLastSwapBufferTime/1000.0,
1683            mLastTransactionTime/1000.0,
1684            mTransactionFlags,
1685            hw.getRefreshRate(),
1686            hw.getDpiX(),
1687            hw.getDpiY());
1688    result.append(buffer);
1689
1690    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1691            inSwapBuffersDuration/1000.0);
1692    result.append(buffer);
1693
1694    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1695            inTransactionDuration/1000.0);
1696    result.append(buffer);
1697
1698    /*
1699     * VSYNC state
1700     */
1701    mEventThread->dump(result, buffer, SIZE);
1702
1703    /*
1704     * Dump HWComposer state
1705     */
1706    HWComposer& hwc(hw.getHwComposer());
1707    snprintf(buffer, SIZE, "h/w composer state:\n");
1708    result.append(buffer);
1709    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1710            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1711                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1712    result.append(buffer);
1713    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1714
1715    /*
1716     * Dump gralloc state
1717     */
1718    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1719    alloc.dump(result);
1720    hw.dump(result);
1721}
1722
1723status_t SurfaceFlinger::onTransact(
1724    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1725{
1726    switch (code) {
1727        case CREATE_CONNECTION:
1728        case SET_TRANSACTION_STATE:
1729        case SET_ORIENTATION:
1730        case BOOT_FINISHED:
1731        case TURN_ELECTRON_BEAM_OFF:
1732        case TURN_ELECTRON_BEAM_ON:
1733        {
1734            // codes that require permission check
1735            IPCThreadState* ipc = IPCThreadState::self();
1736            const int pid = ipc->getCallingPid();
1737            const int uid = ipc->getCallingUid();
1738            if ((uid != AID_GRAPHICS) &&
1739                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1740                ALOGE("Permission Denial: "
1741                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1742                return PERMISSION_DENIED;
1743            }
1744            break;
1745        }
1746        case CAPTURE_SCREEN:
1747        {
1748            // codes that require permission check
1749            IPCThreadState* ipc = IPCThreadState::self();
1750            const int pid = ipc->getCallingPid();
1751            const int uid = ipc->getCallingUid();
1752            if ((uid != AID_GRAPHICS) &&
1753                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1754                ALOGE("Permission Denial: "
1755                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1756                return PERMISSION_DENIED;
1757            }
1758            break;
1759        }
1760    }
1761
1762    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1763    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1764        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1765        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1766            IPCThreadState* ipc = IPCThreadState::self();
1767            const int pid = ipc->getCallingPid();
1768            const int uid = ipc->getCallingUid();
1769            ALOGE("Permission Denial: "
1770                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1771            return PERMISSION_DENIED;
1772        }
1773        int n;
1774        switch (code) {
1775            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1776            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1777                return NO_ERROR;
1778            case 1002:  // SHOW_UPDATES
1779                n = data.readInt32();
1780                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1781                invalidateHwcGeometry();
1782                repaintEverything();
1783                return NO_ERROR;
1784            case 1003:  // SHOW_BACKGROUND
1785                n = data.readInt32();
1786                mDebugBackground = n ? 1 : 0;
1787                return NO_ERROR;
1788            case 1004:{ // repaint everything
1789                repaintEverything();
1790                return NO_ERROR;
1791            }
1792            case 1005:{ // force transaction
1793                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1794                return NO_ERROR;
1795            }
1796            case 1006:{ // send empty update
1797                signalRefresh();
1798                return NO_ERROR;
1799            }
1800            case 1008:  // toggle use of hw composer
1801                n = data.readInt32();
1802                mDebugDisableHWC = n ? 1 : 0;
1803                invalidateHwcGeometry();
1804                repaintEverything();
1805                return NO_ERROR;
1806            case 1009:  // toggle use of transform hint
1807                n = data.readInt32();
1808                mDebugDisableTransformHint = n ? 1 : 0;
1809                invalidateHwcGeometry();
1810                repaintEverything();
1811                return NO_ERROR;
1812            case 1010:  // interrogate.
1813                reply->writeInt32(0);
1814                reply->writeInt32(0);
1815                reply->writeInt32(mDebugRegion);
1816                reply->writeInt32(mDebugBackground);
1817                reply->writeInt32(mDebugDisableHWC);
1818                return NO_ERROR;
1819            case 1013: {
1820                Mutex::Autolock _l(mStateLock);
1821                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1822                reply->writeInt32(hw.getPageFlipCount());
1823            }
1824            return NO_ERROR;
1825        }
1826    }
1827    return err;
1828}
1829
1830void SurfaceFlinger::repaintEverything() {
1831    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1832    const Rect bounds(hw.getBounds());
1833    setInvalidateRegion(Region(bounds));
1834    signalTransaction();
1835}
1836
1837void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1838    Mutex::Autolock _l(mInvalidateLock);
1839    mInvalidateRegion = reg;
1840}
1841
1842Region SurfaceFlinger::getAndClearInvalidateRegion() {
1843    Mutex::Autolock _l(mInvalidateLock);
1844    Region reg(mInvalidateRegion);
1845    mInvalidateRegion.clear();
1846    return reg;
1847}
1848
1849// ---------------------------------------------------------------------------
1850
1851status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1852        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1853{
1854    Mutex::Autolock _l(mStateLock);
1855    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1856}
1857
1858status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1859        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1860{
1861    if (!GLExtensions::getInstance().haveFramebufferObject())
1862        return INVALID_OPERATION;
1863
1864    // get screen geometry
1865    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1866    const uint32_t hw_w = hw.getWidth();
1867    const uint32_t hw_h = hw.getHeight();
1868    GLfloat u = 1;
1869    GLfloat v = 1;
1870
1871    // make sure to clear all GL error flags
1872    while ( glGetError() != GL_NO_ERROR ) ;
1873
1874    // create a FBO
1875    GLuint name, tname;
1876    glGenTextures(1, &tname);
1877    glBindTexture(GL_TEXTURE_2D, tname);
1878    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1879            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1880    if (glGetError() != GL_NO_ERROR) {
1881        while ( glGetError() != GL_NO_ERROR ) ;
1882        GLint tw = (2 << (31 - clz(hw_w)));
1883        GLint th = (2 << (31 - clz(hw_h)));
1884        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1885                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1886        u = GLfloat(hw_w) / tw;
1887        v = GLfloat(hw_h) / th;
1888    }
1889    glGenFramebuffersOES(1, &name);
1890    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1891    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1892            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1893
1894    // redraw the screen entirely...
1895    glDisable(GL_TEXTURE_EXTERNAL_OES);
1896    glDisable(GL_TEXTURE_2D);
1897    glDisable(GL_SCISSOR_TEST);
1898    glClearColor(0,0,0,1);
1899    glClear(GL_COLOR_BUFFER_BIT);
1900    glEnable(GL_SCISSOR_TEST);
1901    glMatrixMode(GL_MODELVIEW);
1902    glLoadIdentity();
1903    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1904    const size_t count = layers.size();
1905    for (size_t i=0 ; i<count ; ++i) {
1906        const sp<LayerBase>& layer(layers[i]);
1907        layer->drawForSreenShot();
1908    }
1909
1910    hw.compositionComplete();
1911
1912    // back to main framebuffer
1913    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1914    glDisable(GL_SCISSOR_TEST);
1915    glDeleteFramebuffersOES(1, &name);
1916
1917    *textureName = tname;
1918    *uOut = u;
1919    *vOut = v;
1920    return NO_ERROR;
1921}
1922
1923// ---------------------------------------------------------------------------
1924
1925status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1926{
1927    // get screen geometry
1928    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1929    const uint32_t hw_w = hw.getWidth();
1930    const uint32_t hw_h = hw.getHeight();
1931    const Region screenBounds(hw.getBounds());
1932
1933    GLfloat u, v;
1934    GLuint tname;
1935    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1936    if (result != NO_ERROR) {
1937        return result;
1938    }
1939
1940    GLfloat vtx[8];
1941    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1942    glBindTexture(GL_TEXTURE_2D, tname);
1943    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1944    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1945    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1946    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1947    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1948    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1949    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1950    glVertexPointer(2, GL_FLOAT, 0, vtx);
1951
1952    /*
1953     * Texture coordinate mapping
1954     *
1955     *                 u
1956     *    1 +----------+---+
1957     *      |     |    |   |  image is inverted
1958     *      |     V    |   |  w.r.t. the texture
1959     *  1-v +----------+   |  coordinates
1960     *      |              |
1961     *      |              |
1962     *      |              |
1963     *    0 +--------------+
1964     *      0              1
1965     *
1966     */
1967
1968    class s_curve_interpolator {
1969        const float nbFrames, s, v;
1970    public:
1971        s_curve_interpolator(int nbFrames, float s)
1972        : nbFrames(1.0f / (nbFrames-1)), s(s),
1973          v(1.0f + expf(-s + 0.5f*s)) {
1974        }
1975        float operator()(int f) {
1976            const float x = f * nbFrames;
1977            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1978        }
1979    };
1980
1981    class v_stretch {
1982        const GLfloat hw_w, hw_h;
1983    public:
1984        v_stretch(uint32_t hw_w, uint32_t hw_h)
1985        : hw_w(hw_w), hw_h(hw_h) {
1986        }
1987        void operator()(GLfloat* vtx, float v) {
1988            const GLfloat w = hw_w + (hw_w * v);
1989            const GLfloat h = hw_h - (hw_h * v);
1990            const GLfloat x = (hw_w - w) * 0.5f;
1991            const GLfloat y = (hw_h - h) * 0.5f;
1992            vtx[0] = x;         vtx[1] = y;
1993            vtx[2] = x;         vtx[3] = y + h;
1994            vtx[4] = x + w;     vtx[5] = y + h;
1995            vtx[6] = x + w;     vtx[7] = y;
1996        }
1997    };
1998
1999    class h_stretch {
2000        const GLfloat hw_w, hw_h;
2001    public:
2002        h_stretch(uint32_t hw_w, uint32_t hw_h)
2003        : hw_w(hw_w), hw_h(hw_h) {
2004        }
2005        void operator()(GLfloat* vtx, float v) {
2006            const GLfloat w = hw_w - (hw_w * v);
2007            const GLfloat h = 1.0f;
2008            const GLfloat x = (hw_w - w) * 0.5f;
2009            const GLfloat y = (hw_h - h) * 0.5f;
2010            vtx[0] = x;         vtx[1] = y;
2011            vtx[2] = x;         vtx[3] = y + h;
2012            vtx[4] = x + w;     vtx[5] = y + h;
2013            vtx[6] = x + w;     vtx[7] = y;
2014        }
2015    };
2016
2017    // the full animation is 24 frames
2018    char value[PROPERTY_VALUE_MAX];
2019    property_get("debug.sf.electron_frames", value, "24");
2020    int nbFrames = (atoi(value) + 1) >> 1;
2021    if (nbFrames <= 0) // just in case
2022        nbFrames = 24;
2023
2024    s_curve_interpolator itr(nbFrames, 7.5f);
2025    s_curve_interpolator itg(nbFrames, 8.0f);
2026    s_curve_interpolator itb(nbFrames, 8.5f);
2027
2028    v_stretch vverts(hw_w, hw_h);
2029
2030    glMatrixMode(GL_TEXTURE);
2031    glLoadIdentity();
2032    glMatrixMode(GL_MODELVIEW);
2033    glLoadIdentity();
2034
2035    glEnable(GL_BLEND);
2036    glBlendFunc(GL_ONE, GL_ONE);
2037    for (int i=0 ; i<nbFrames ; i++) {
2038        float x, y, w, h;
2039        const float vr = itr(i);
2040        const float vg = itg(i);
2041        const float vb = itb(i);
2042
2043        // clear screen
2044        glColorMask(1,1,1,1);
2045        glClear(GL_COLOR_BUFFER_BIT);
2046        glEnable(GL_TEXTURE_2D);
2047
2048        // draw the red plane
2049        vverts(vtx, vr);
2050        glColorMask(1,0,0,1);
2051        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2052
2053        // draw the green plane
2054        vverts(vtx, vg);
2055        glColorMask(0,1,0,1);
2056        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2057
2058        // draw the blue plane
2059        vverts(vtx, vb);
2060        glColorMask(0,0,1,1);
2061        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2062
2063        // draw the white highlight (we use the last vertices)
2064        glDisable(GL_TEXTURE_2D);
2065        glColorMask(1,1,1,1);
2066        glColor4f(vg, vg, vg, 1);
2067        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2068        hw.flip(screenBounds);
2069    }
2070
2071    h_stretch hverts(hw_w, hw_h);
2072    glDisable(GL_BLEND);
2073    glDisable(GL_TEXTURE_2D);
2074    glColorMask(1,1,1,1);
2075    for (int i=0 ; i<nbFrames ; i++) {
2076        const float v = itg(i);
2077        hverts(vtx, v);
2078        glClear(GL_COLOR_BUFFER_BIT);
2079        glColor4f(1-v, 1-v, 1-v, 1);
2080        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2081        hw.flip(screenBounds);
2082    }
2083
2084    glColorMask(1,1,1,1);
2085    glEnable(GL_SCISSOR_TEST);
2086    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2087    glDeleteTextures(1, &tname);
2088    glDisable(GL_TEXTURE_2D);
2089    glDisable(GL_BLEND);
2090    return NO_ERROR;
2091}
2092
2093status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2094{
2095    status_t result = PERMISSION_DENIED;
2096
2097    if (!GLExtensions::getInstance().haveFramebufferObject())
2098        return INVALID_OPERATION;
2099
2100
2101    // get screen geometry
2102    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2103    const uint32_t hw_w = hw.getWidth();
2104    const uint32_t hw_h = hw.getHeight();
2105    const Region screenBounds(hw.bounds());
2106
2107    GLfloat u, v;
2108    GLuint tname;
2109    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2110    if (result != NO_ERROR) {
2111        return result;
2112    }
2113
2114    GLfloat vtx[8];
2115    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2116    glBindTexture(GL_TEXTURE_2D, tname);
2117    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2118    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2119    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2120    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2121    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2122    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2123    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2124    glVertexPointer(2, GL_FLOAT, 0, vtx);
2125
2126    class s_curve_interpolator {
2127        const float nbFrames, s, v;
2128    public:
2129        s_curve_interpolator(int nbFrames, float s)
2130        : nbFrames(1.0f / (nbFrames-1)), s(s),
2131          v(1.0f + expf(-s + 0.5f*s)) {
2132        }
2133        float operator()(int f) {
2134            const float x = f * nbFrames;
2135            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2136        }
2137    };
2138
2139    class v_stretch {
2140        const GLfloat hw_w, hw_h;
2141    public:
2142        v_stretch(uint32_t hw_w, uint32_t hw_h)
2143        : hw_w(hw_w), hw_h(hw_h) {
2144        }
2145        void operator()(GLfloat* vtx, float v) {
2146            const GLfloat w = hw_w + (hw_w * v);
2147            const GLfloat h = hw_h - (hw_h * v);
2148            const GLfloat x = (hw_w - w) * 0.5f;
2149            const GLfloat y = (hw_h - h) * 0.5f;
2150            vtx[0] = x;         vtx[1] = y;
2151            vtx[2] = x;         vtx[3] = y + h;
2152            vtx[4] = x + w;     vtx[5] = y + h;
2153            vtx[6] = x + w;     vtx[7] = y;
2154        }
2155    };
2156
2157    class h_stretch {
2158        const GLfloat hw_w, hw_h;
2159    public:
2160        h_stretch(uint32_t hw_w, uint32_t hw_h)
2161        : hw_w(hw_w), hw_h(hw_h) {
2162        }
2163        void operator()(GLfloat* vtx, float v) {
2164            const GLfloat w = hw_w - (hw_w * v);
2165            const GLfloat h = 1.0f;
2166            const GLfloat x = (hw_w - w) * 0.5f;
2167            const GLfloat y = (hw_h - h) * 0.5f;
2168            vtx[0] = x;         vtx[1] = y;
2169            vtx[2] = x;         vtx[3] = y + h;
2170            vtx[4] = x + w;     vtx[5] = y + h;
2171            vtx[6] = x + w;     vtx[7] = y;
2172        }
2173    };
2174
2175    // the full animation is 12 frames
2176    int nbFrames = 8;
2177    s_curve_interpolator itr(nbFrames, 7.5f);
2178    s_curve_interpolator itg(nbFrames, 8.0f);
2179    s_curve_interpolator itb(nbFrames, 8.5f);
2180
2181    h_stretch hverts(hw_w, hw_h);
2182    glDisable(GL_BLEND);
2183    glDisable(GL_TEXTURE_2D);
2184    glColorMask(1,1,1,1);
2185    for (int i=nbFrames-1 ; i>=0 ; i--) {
2186        const float v = itg(i);
2187        hverts(vtx, v);
2188        glClear(GL_COLOR_BUFFER_BIT);
2189        glColor4f(1-v, 1-v, 1-v, 1);
2190        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2191        hw.flip(screenBounds);
2192    }
2193
2194    nbFrames = 4;
2195    v_stretch vverts(hw_w, hw_h);
2196    glEnable(GL_BLEND);
2197    glBlendFunc(GL_ONE, GL_ONE);
2198    for (int i=nbFrames-1 ; i>=0 ; i--) {
2199        float x, y, w, h;
2200        const float vr = itr(i);
2201        const float vg = itg(i);
2202        const float vb = itb(i);
2203
2204        // clear screen
2205        glColorMask(1,1,1,1);
2206        glClear(GL_COLOR_BUFFER_BIT);
2207        glEnable(GL_TEXTURE_2D);
2208
2209        // draw the red plane
2210        vverts(vtx, vr);
2211        glColorMask(1,0,0,1);
2212        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2213
2214        // draw the green plane
2215        vverts(vtx, vg);
2216        glColorMask(0,1,0,1);
2217        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2218
2219        // draw the blue plane
2220        vverts(vtx, vb);
2221        glColorMask(0,0,1,1);
2222        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2223
2224        hw.flip(screenBounds);
2225    }
2226
2227    glColorMask(1,1,1,1);
2228    glEnable(GL_SCISSOR_TEST);
2229    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2230    glDeleteTextures(1, &tname);
2231    glDisable(GL_TEXTURE_2D);
2232    glDisable(GL_BLEND);
2233
2234    return NO_ERROR;
2235}
2236
2237// ---------------------------------------------------------------------------
2238
2239status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2240{
2241    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2242    if (!hw.canDraw()) {
2243        // we're already off
2244        return NO_ERROR;
2245    }
2246
2247    // turn off hwc while we're doing the animation
2248    hw.getHwComposer().disable();
2249    // and make sure to turn it back on (if needed) next time we compose
2250    invalidateHwcGeometry();
2251
2252    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2253        electronBeamOffAnimationImplLocked();
2254    }
2255
2256    // always clear the whole screen at the end of the animation
2257    glClearColor(0,0,0,1);
2258    glDisable(GL_SCISSOR_TEST);
2259    glClear(GL_COLOR_BUFFER_BIT);
2260    glEnable(GL_SCISSOR_TEST);
2261    hw.flip( Region(hw.bounds()) );
2262
2263    return NO_ERROR;
2264}
2265
2266status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2267{
2268    class MessageTurnElectronBeamOff : public MessageBase {
2269        SurfaceFlinger* flinger;
2270        int32_t mode;
2271        status_t result;
2272    public:
2273        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2274            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2275        }
2276        status_t getResult() const {
2277            return result;
2278        }
2279        virtual bool handler() {
2280            Mutex::Autolock _l(flinger->mStateLock);
2281            result = flinger->turnElectronBeamOffImplLocked(mode);
2282            return true;
2283        }
2284    };
2285
2286    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2287    status_t res = postMessageSync(msg);
2288    if (res == NO_ERROR) {
2289        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2290
2291        // work-around: when the power-manager calls us we activate the
2292        // animation. eventually, the "on" animation will be called
2293        // by the power-manager itself
2294        mElectronBeamAnimationMode = mode;
2295    }
2296    return res;
2297}
2298
2299// ---------------------------------------------------------------------------
2300
2301status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2302{
2303    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2304    if (hw.canDraw()) {
2305        // we're already on
2306        return NO_ERROR;
2307    }
2308    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2309        electronBeamOnAnimationImplLocked();
2310    }
2311
2312    // make sure to redraw the whole screen when the animation is done
2313    mDirtyRegion.set(hw.bounds());
2314    signalTransaction();
2315
2316    return NO_ERROR;
2317}
2318
2319status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2320{
2321    class MessageTurnElectronBeamOn : public MessageBase {
2322        SurfaceFlinger* flinger;
2323        int32_t mode;
2324        status_t result;
2325    public:
2326        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2327            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2328        }
2329        status_t getResult() const {
2330            return result;
2331        }
2332        virtual bool handler() {
2333            Mutex::Autolock _l(flinger->mStateLock);
2334            result = flinger->turnElectronBeamOnImplLocked(mode);
2335            return true;
2336        }
2337    };
2338
2339    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2340    return NO_ERROR;
2341}
2342
2343// ---------------------------------------------------------------------------
2344
2345status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2346        sp<IMemoryHeap>* heap,
2347        uint32_t* w, uint32_t* h, PixelFormat* f,
2348        uint32_t sw, uint32_t sh,
2349        uint32_t minLayerZ, uint32_t maxLayerZ)
2350{
2351    status_t result = PERMISSION_DENIED;
2352
2353    // only one display supported for now
2354    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2355        return BAD_VALUE;
2356
2357    if (!GLExtensions::getInstance().haveFramebufferObject())
2358        return INVALID_OPERATION;
2359
2360    // get screen geometry
2361    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2362    const uint32_t hw_w = hw.getWidth();
2363    const uint32_t hw_h = hw.getHeight();
2364
2365    if ((sw > hw_w) || (sh > hw_h))
2366        return BAD_VALUE;
2367
2368    sw = (!sw) ? hw_w : sw;
2369    sh = (!sh) ? hw_h : sh;
2370    const size_t size = sw * sh * 4;
2371
2372    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2373    //        sw, sh, minLayerZ, maxLayerZ);
2374
2375    // make sure to clear all GL error flags
2376    while ( glGetError() != GL_NO_ERROR ) ;
2377
2378    // create a FBO
2379    GLuint name, tname;
2380    glGenRenderbuffersOES(1, &tname);
2381    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2382    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2383    glGenFramebuffersOES(1, &name);
2384    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2385    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2386            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2387
2388    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2389
2390    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2391
2392        // invert everything, b/c glReadPixel() below will invert the FB
2393        glViewport(0, 0, sw, sh);
2394        glScissor(0, 0, sw, sh);
2395        glEnable(GL_SCISSOR_TEST);
2396        glMatrixMode(GL_PROJECTION);
2397        glPushMatrix();
2398        glLoadIdentity();
2399        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2400        glMatrixMode(GL_MODELVIEW);
2401
2402        // redraw the screen entirely...
2403        glClearColor(0,0,0,1);
2404        glClear(GL_COLOR_BUFFER_BIT);
2405
2406        const LayerVector& layers(mDrawingState.layersSortedByZ);
2407        const size_t count = layers.size();
2408        for (size_t i=0 ; i<count ; ++i) {
2409            const sp<LayerBase>& layer(layers[i]);
2410            const uint32_t flags = layer->drawingState().flags;
2411            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2412                const uint32_t z = layer->drawingState().z;
2413                if (z >= minLayerZ && z <= maxLayerZ) {
2414                    layer->drawForSreenShot();
2415                }
2416            }
2417        }
2418
2419        // XXX: this is needed on tegra
2420        glEnable(GL_SCISSOR_TEST);
2421        glScissor(0, 0, sw, sh);
2422
2423        // check for errors and return screen capture
2424        if (glGetError() != GL_NO_ERROR) {
2425            // error while rendering
2426            result = INVALID_OPERATION;
2427        } else {
2428            // allocate shared memory large enough to hold the
2429            // screen capture
2430            sp<MemoryHeapBase> base(
2431                    new MemoryHeapBase(size, 0, "screen-capture") );
2432            void* const ptr = base->getBase();
2433            if (ptr) {
2434                // capture the screen with glReadPixels()
2435                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2436                if (glGetError() == GL_NO_ERROR) {
2437                    *heap = base;
2438                    *w = sw;
2439                    *h = sh;
2440                    *f = PIXEL_FORMAT_RGBA_8888;
2441                    result = NO_ERROR;
2442                }
2443            } else {
2444                result = NO_MEMORY;
2445            }
2446        }
2447        glEnable(GL_SCISSOR_TEST);
2448        glViewport(0, 0, hw_w, hw_h);
2449        glMatrixMode(GL_PROJECTION);
2450        glPopMatrix();
2451        glMatrixMode(GL_MODELVIEW);
2452    } else {
2453        result = BAD_VALUE;
2454    }
2455
2456    // release FBO resources
2457    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2458    glDeleteRenderbuffersOES(1, &tname);
2459    glDeleteFramebuffersOES(1, &name);
2460
2461    hw.compositionComplete();
2462
2463    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2464
2465    return result;
2466}
2467
2468
2469status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2470        sp<IMemoryHeap>* heap,
2471        uint32_t* width, uint32_t* height, PixelFormat* format,
2472        uint32_t sw, uint32_t sh,
2473        uint32_t minLayerZ, uint32_t maxLayerZ)
2474{
2475    // only one display supported for now
2476    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2477        return BAD_VALUE;
2478
2479    if (!GLExtensions::getInstance().haveFramebufferObject())
2480        return INVALID_OPERATION;
2481
2482    class MessageCaptureScreen : public MessageBase {
2483        SurfaceFlinger* flinger;
2484        DisplayID dpy;
2485        sp<IMemoryHeap>* heap;
2486        uint32_t* w;
2487        uint32_t* h;
2488        PixelFormat* f;
2489        uint32_t sw;
2490        uint32_t sh;
2491        uint32_t minLayerZ;
2492        uint32_t maxLayerZ;
2493        status_t result;
2494    public:
2495        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2496                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2497                uint32_t sw, uint32_t sh,
2498                uint32_t minLayerZ, uint32_t maxLayerZ)
2499            : flinger(flinger), dpy(dpy),
2500              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2501              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2502              result(PERMISSION_DENIED)
2503        {
2504        }
2505        status_t getResult() const {
2506            return result;
2507        }
2508        virtual bool handler() {
2509            Mutex::Autolock _l(flinger->mStateLock);
2510
2511            // if we have secure windows, never allow the screen capture
2512            if (flinger->mSecureFrameBuffer)
2513                return true;
2514
2515            result = flinger->captureScreenImplLocked(dpy,
2516                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2517
2518            return true;
2519        }
2520    };
2521
2522    sp<MessageBase> msg = new MessageCaptureScreen(this,
2523            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2524    status_t res = postMessageSync(msg);
2525    if (res == NO_ERROR) {
2526        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2527    }
2528    return res;
2529}
2530
2531// ---------------------------------------------------------------------------
2532
2533sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2534{
2535    sp<Layer> result;
2536    Mutex::Autolock _l(mStateLock);
2537    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2538    return result;
2539}
2540
2541// ---------------------------------------------------------------------------
2542
2543Client::Client(const sp<SurfaceFlinger>& flinger)
2544    : mFlinger(flinger), mNameGenerator(1)
2545{
2546}
2547
2548Client::~Client()
2549{
2550    const size_t count = mLayers.size();
2551    for (size_t i=0 ; i<count ; i++) {
2552        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2553        if (layer != 0) {
2554            mFlinger->removeLayer(layer);
2555        }
2556    }
2557}
2558
2559status_t Client::initCheck() const {
2560    return NO_ERROR;
2561}
2562
2563size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2564{
2565    Mutex::Autolock _l(mLock);
2566    size_t name = mNameGenerator++;
2567    mLayers.add(name, layer);
2568    return name;
2569}
2570
2571void Client::detachLayer(const LayerBaseClient* layer)
2572{
2573    Mutex::Autolock _l(mLock);
2574    // we do a linear search here, because this doesn't happen often
2575    const size_t count = mLayers.size();
2576    for (size_t i=0 ; i<count ; i++) {
2577        if (mLayers.valueAt(i) == layer) {
2578            mLayers.removeItemsAt(i, 1);
2579            break;
2580        }
2581    }
2582}
2583sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2584{
2585    Mutex::Autolock _l(mLock);
2586    sp<LayerBaseClient> lbc;
2587    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2588    if (layer != 0) {
2589        lbc = layer.promote();
2590        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2591    }
2592    return lbc;
2593}
2594
2595
2596status_t Client::onTransact(
2597    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2598{
2599    // these must be checked
2600     IPCThreadState* ipc = IPCThreadState::self();
2601     const int pid = ipc->getCallingPid();
2602     const int uid = ipc->getCallingUid();
2603     const int self_pid = getpid();
2604     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2605         // we're called from a different process, do the real check
2606         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2607         {
2608             ALOGE("Permission Denial: "
2609                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2610             return PERMISSION_DENIED;
2611         }
2612     }
2613     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2614}
2615
2616
2617sp<ISurface> Client::createSurface(
2618        ISurfaceComposerClient::surface_data_t* params,
2619        const String8& name,
2620        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2621        uint32_t flags)
2622{
2623    /*
2624     * createSurface must be called from the GL thread so that it can
2625     * have access to the GL context.
2626     */
2627
2628    class MessageCreateSurface : public MessageBase {
2629        sp<ISurface> result;
2630        SurfaceFlinger* flinger;
2631        ISurfaceComposerClient::surface_data_t* params;
2632        Client* client;
2633        const String8& name;
2634        DisplayID display;
2635        uint32_t w, h;
2636        PixelFormat format;
2637        uint32_t flags;
2638    public:
2639        MessageCreateSurface(SurfaceFlinger* flinger,
2640                ISurfaceComposerClient::surface_data_t* params,
2641                const String8& name, Client* client,
2642                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2643                uint32_t flags)
2644            : flinger(flinger), params(params), client(client), name(name),
2645              display(display), w(w), h(h), format(format), flags(flags)
2646        {
2647        }
2648        sp<ISurface> getResult() const { return result; }
2649        virtual bool handler() {
2650            result = flinger->createSurface(params, name, client,
2651                    display, w, h, format, flags);
2652            return true;
2653        }
2654    };
2655
2656    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2657            params, name, this, display, w, h, format, flags);
2658    mFlinger->postMessageSync(msg);
2659    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2660}
2661status_t Client::destroySurface(SurfaceID sid) {
2662    return mFlinger->removeSurface(this, sid);
2663}
2664
2665// ---------------------------------------------------------------------------
2666
2667GraphicBufferAlloc::GraphicBufferAlloc() {}
2668
2669GraphicBufferAlloc::~GraphicBufferAlloc() {}
2670
2671sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2672        PixelFormat format, uint32_t usage, status_t* error) {
2673    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2674    status_t err = graphicBuffer->initCheck();
2675    *error = err;
2676    if (err != 0 || graphicBuffer->handle == 0) {
2677        if (err == NO_MEMORY) {
2678            GraphicBuffer::dumpAllocationsToSystemLog();
2679        }
2680        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2681             "failed (%s), handle=%p",
2682                w, h, strerror(-err), graphicBuffer->handle);
2683        return 0;
2684    }
2685    return graphicBuffer;
2686}
2687
2688// ---------------------------------------------------------------------------
2689
2690GraphicPlane::GraphicPlane()
2691    : mHw(0)
2692{
2693}
2694
2695GraphicPlane::~GraphicPlane() {
2696    delete mHw;
2697}
2698
2699bool GraphicPlane::initialized() const {
2700    return mHw ? true : false;
2701}
2702
2703int GraphicPlane::getWidth() const {
2704    return mWidth;
2705}
2706
2707int GraphicPlane::getHeight() const {
2708    return mHeight;
2709}
2710
2711void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2712{
2713    mHw = hw;
2714
2715    // initialize the display orientation transform.
2716    // it's a constant that should come from the display driver.
2717    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2718    char property[PROPERTY_VALUE_MAX];
2719    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2720        //displayOrientation
2721        switch (atoi(property)) {
2722        case 90:
2723            displayOrientation = ISurfaceComposer::eOrientation90;
2724            break;
2725        case 270:
2726            displayOrientation = ISurfaceComposer::eOrientation270;
2727            break;
2728        }
2729    }
2730
2731    const float w = hw->getWidth();
2732    const float h = hw->getHeight();
2733    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2734            &mDisplayTransform);
2735    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2736        mDisplayWidth = h;
2737        mDisplayHeight = w;
2738    } else {
2739        mDisplayWidth = w;
2740        mDisplayHeight = h;
2741    }
2742
2743    setOrientation(ISurfaceComposer::eOrientationDefault);
2744}
2745
2746status_t GraphicPlane::orientationToTransfrom(
2747        int orientation, int w, int h, Transform* tr)
2748{
2749    uint32_t flags = 0;
2750    switch (orientation) {
2751    case ISurfaceComposer::eOrientationDefault:
2752        flags = Transform::ROT_0;
2753        break;
2754    case ISurfaceComposer::eOrientation90:
2755        flags = Transform::ROT_90;
2756        break;
2757    case ISurfaceComposer::eOrientation180:
2758        flags = Transform::ROT_180;
2759        break;
2760    case ISurfaceComposer::eOrientation270:
2761        flags = Transform::ROT_270;
2762        break;
2763    default:
2764        return BAD_VALUE;
2765    }
2766    tr->set(flags, w, h);
2767    return NO_ERROR;
2768}
2769
2770status_t GraphicPlane::setOrientation(int orientation)
2771{
2772    // If the rotation can be handled in hardware, this is where
2773    // the magic should happen.
2774
2775    const DisplayHardware& hw(displayHardware());
2776    const float w = mDisplayWidth;
2777    const float h = mDisplayHeight;
2778    mWidth = int(w);
2779    mHeight = int(h);
2780
2781    Transform orientationTransform;
2782    GraphicPlane::orientationToTransfrom(orientation, w, h,
2783            &orientationTransform);
2784    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2785        mWidth = int(h);
2786        mHeight = int(w);
2787    }
2788
2789    mOrientation = orientation;
2790    mGlobalTransform = mDisplayTransform * orientationTransform;
2791    return NO_ERROR;
2792}
2793
2794const DisplayHardware& GraphicPlane::displayHardware() const {
2795    return *mHw;
2796}
2797
2798DisplayHardware& GraphicPlane::editDisplayHardware() {
2799    return *mHw;
2800}
2801
2802const Transform& GraphicPlane::transform() const {
2803    return mGlobalTransform;
2804}
2805
2806EGLDisplay GraphicPlane::getEGLDisplay() const {
2807    return mHw->getEGLDisplay();
2808}
2809
2810// ---------------------------------------------------------------------------
2811
2812}; // namespace android
2813