SurfaceFlinger.cpp revision db403e8ff0d7727015e1a5009bab20eb7ec205bc 
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 "Client.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#include <gui/BitTube.h>
67
68#define EGL_VERSION_HW_ANDROID  0x3143
69
70#define DISPLAY_COUNT       1
71
72namespace android {
73// ---------------------------------------------------------------------------
74
75const String16 sHardwareTest("android.permission.HARDWARE_TEST");
76const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
77const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
78const String16 sDump("android.permission.DUMP");
79
80// ---------------------------------------------------------------------------
81
82SurfaceFlinger::SurfaceFlinger()
83    :   BnSurfaceComposer(), Thread(false),
84        mTransactionFlags(0),
85        mTransationPending(false),
86        mLayersRemoved(false),
87        mBootTime(systemTime()),
88        mVisibleRegionsDirty(false),
89        mHwWorkListDirty(false),
90        mElectronBeamAnimationMode(0),
91        mDebugRegion(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        mSecureFrameBuffer(0)
101{
102    init();
103}
104
105void SurfaceFlinger::init()
106{
107    ALOGI("SurfaceFlinger is starting");
108
109    // debugging stuff...
110    char value[PROPERTY_VALUE_MAX];
111
112    property_get("debug.sf.showupdates", value, "0");
113    mDebugRegion = atoi(value);
114
115#ifdef DDMS_DEBUGGING
116    property_get("debug.sf.ddms", value, "0");
117    mDebugDDMS = atoi(value);
118    if (mDebugDDMS) {
119        DdmConnection::start(getServiceName());
120    }
121#endif
122
123    ALOGI_IF(mDebugRegion,       "showupdates enabled");
124    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
125}
126
127void SurfaceFlinger::onFirstRef()
128{
129    mEventQueue.init(this);
130
131    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
132
133    // Wait for the main thread to be done with its initialization
134    mReadyToRunBarrier.wait();
135}
136
137
138SurfaceFlinger::~SurfaceFlinger()
139{
140    glDeleteTextures(1, &mWormholeTexName);
141}
142
143void SurfaceFlinger::binderDied(const wp<IBinder>& who)
144{
145    // the window manager died on us. prepare its eulogy.
146
147    // reset screen orientation
148    Vector<ComposerState> state;
149    setTransactionState(state, eOrientationDefault, 0);
150
151    // restart the boot-animation
152    property_set("ctl.start", "bootanim");
153}
154
155sp<IMemoryHeap> SurfaceFlinger::getCblk() const
156{
157    return mServerHeap;
158}
159
160sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
161{
162    sp<ISurfaceComposerClient> bclient;
163    sp<Client> client(new Client(this));
164    status_t err = client->initCheck();
165    if (err == NO_ERROR) {
166        bclient = client;
167    }
168    return bclient;
169}
170
171sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
172{
173    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
174    return gba;
175}
176
177const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
178{
179    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
180    const GraphicPlane& plane(mGraphicPlanes[dpy]);
181    return plane;
182}
183
184GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
185{
186    return const_cast<GraphicPlane&>(
187        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
188}
189
190void SurfaceFlinger::bootFinished()
191{
192    const nsecs_t now = systemTime();
193    const nsecs_t duration = now - mBootTime;
194    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
195    mBootFinished = true;
196
197    // wait patiently for the window manager death
198    const String16 name("window");
199    sp<IBinder> window(defaultServiceManager()->getService(name));
200    if (window != 0) {
201        window->linkToDeath(this);
202    }
203
204    // stop boot animation
205    property_set("ctl.stop", "bootanim");
206}
207
208static inline uint16_t pack565(int r, int g, int b) {
209    return (r<<11)|(g<<5)|b;
210}
211
212status_t SurfaceFlinger::readyToRun()
213{
214    ALOGI(   "SurfaceFlinger's main thread ready to run. "
215            "Initializing graphics H/W...");
216
217    // we only support one display currently
218    int dpy = 0;
219
220    {
221        // initialize the main display
222        GraphicPlane& plane(graphicPlane(dpy));
223        DisplayHardware* const hw = new DisplayHardware(this, dpy);
224        plane.setDisplayHardware(hw);
225    }
226
227    // create the shared control-block
228    mServerHeap = new MemoryHeapBase(4096,
229            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
230    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
231
232    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
233    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
234
235    new(mServerCblk) surface_flinger_cblk_t;
236
237    // initialize primary screen
238    // (other display should be initialized in the same manner, but
239    // asynchronously, as they could come and go. None of this is supported
240    // yet).
241    const GraphicPlane& plane(graphicPlane(dpy));
242    const DisplayHardware& hw = plane.displayHardware();
243    const uint32_t w = hw.getWidth();
244    const uint32_t h = hw.getHeight();
245    const uint32_t f = hw.getFormat();
246    hw.makeCurrent();
247
248    // initialize the shared control block
249    mServerCblk->connected |= 1<<dpy;
250    display_cblk_t* dcblk = mServerCblk->displays + dpy;
251    memset(dcblk, 0, sizeof(display_cblk_t));
252    dcblk->w            = plane.getWidth();
253    dcblk->h            = plane.getHeight();
254    dcblk->format       = f;
255    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
256    dcblk->xdpi         = hw.getDpiX();
257    dcblk->ydpi         = hw.getDpiY();
258    dcblk->fps          = hw.getRefreshRate();
259    dcblk->density      = hw.getDensity();
260
261    // Initialize OpenGL|ES
262    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
263    glPixelStorei(GL_PACK_ALIGNMENT, 4);
264    glEnableClientState(GL_VERTEX_ARRAY);
265    glShadeModel(GL_FLAT);
266    glDisable(GL_DITHER);
267    glDisable(GL_CULL_FACE);
268
269    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
270    const uint16_t g1 = pack565(0x17,0x2f,0x17);
271    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
272    glGenTextures(1, &mWormholeTexName);
273    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
274    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
275    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
276    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
277    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
278    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
279            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
280
281    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
282    glGenTextures(1, &mProtectedTexName);
283    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
284    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
285    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
286    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
287    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
288    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
289            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
290
291    glViewport(0, 0, w, h);
292    glMatrixMode(GL_PROJECTION);
293    glLoadIdentity();
294    // put the origin in the left-bottom corner
295    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
296
297
298    // start the EventThread
299    mEventThread = new EventThread(this);
300    mEventQueue.setEventThread(mEventThread);
301
302    /*
303     *  We're now ready to accept clients...
304     */
305
306    mReadyToRunBarrier.open();
307
308    // start boot animation
309    property_set("ctl.start", "bootanim");
310
311    return NO_ERROR;
312}
313
314// ----------------------------------------------------------------------------
315
316bool SurfaceFlinger::authenticateSurfaceTexture(
317        const sp<ISurfaceTexture>& surfaceTexture) const {
318    Mutex::Autolock _l(mStateLock);
319    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
320
321    // Check the visible layer list for the ISurface
322    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
323    size_t count = currentLayers.size();
324    for (size_t i=0 ; i<count ; i++) {
325        const sp<LayerBase>& layer(currentLayers[i]);
326        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
327        if (lbc != NULL) {
328            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
329            if (lbcBinder == surfaceTextureBinder) {
330                return true;
331            }
332        }
333    }
334
335    // Check the layers in the purgatory.  This check is here so that if a
336    // SurfaceTexture gets destroyed before all the clients are done using it,
337    // the error will not be reported as "surface XYZ is not authenticated", but
338    // will instead fail later on when the client tries to use the surface,
339    // which should be reported as "surface XYZ returned an -ENODEV".  The
340    // purgatorized layers are no less authentic than the visible ones, so this
341    // should not cause any harm.
342    size_t purgatorySize =  mLayerPurgatory.size();
343    for (size_t i=0 ; i<purgatorySize ; i++) {
344        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
345        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
346        if (lbc != NULL) {
347            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
348            if (lbcBinder == surfaceTextureBinder) {
349                return true;
350            }
351        }
352    }
353
354    return false;
355}
356
357// ----------------------------------------------------------------------------
358
359sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
360    return mEventThread->createEventConnection();
361}
362
363// ----------------------------------------------------------------------------
364
365void SurfaceFlinger::waitForEvent() {
366    mEventQueue.waitMessage();
367}
368
369void SurfaceFlinger::signalTransaction() {
370    mEventQueue.invalidate();
371}
372
373void SurfaceFlinger::signalLayerUpdate() {
374    mEventQueue.invalidate();
375}
376
377void SurfaceFlinger::signalRefresh() {
378    mEventQueue.refresh();
379}
380
381status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
382        nsecs_t reltime, uint32_t flags) {
383    return mEventQueue.postMessage(msg, reltime);
384}
385
386status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
387        nsecs_t reltime, uint32_t flags) {
388    status_t res = mEventQueue.postMessage(msg, reltime);
389    if (res == NO_ERROR) {
390        msg->wait();
391    }
392    return res;
393}
394
395bool SurfaceFlinger::threadLoop()
396{
397    waitForEvent();
398    return true;
399}
400
401void SurfaceFlinger::onMessageReceived(int32_t what)
402{
403    ATRACE_CALL();
404    switch (what) {
405        case MessageQueue::REFRESH: {
406//        case MessageQueue::INVALIDATE: {
407            // if we're in a global transaction, don't do anything.
408            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
409            uint32_t transactionFlags = peekTransactionFlags(mask);
410            if (CC_UNLIKELY(transactionFlags)) {
411                handleTransaction(transactionFlags);
412            }
413
414            // post surfaces (if needed)
415            handlePageFlip();
416
417//            signalRefresh();
418//
419//        } break;
420//
421//        case MessageQueue::REFRESH: {
422
423            handleRefresh();
424
425            const DisplayHardware& hw(graphicPlane(0).displayHardware());
426
427//            if (mDirtyRegion.isEmpty()) {
428//                return;
429//            }
430
431            if (CC_UNLIKELY(mHwWorkListDirty)) {
432                // build the h/w work list
433                handleWorkList();
434            }
435
436            if (CC_LIKELY(hw.canDraw())) {
437                // repaint the framebuffer (if needed)
438                handleRepaint();
439                // inform the h/w that we're done compositing
440                hw.compositionComplete();
441                postFramebuffer();
442            } else {
443                // pretend we did the post
444                hw.compositionComplete();
445            }
446
447        } break;
448    }
449}
450
451void SurfaceFlinger::postFramebuffer()
452{
453    ATRACE_CALL();
454    // mSwapRegion can be empty here is some cases, for instance if a hidden
455    // or fully transparent window is updating.
456    // in that case, we need to flip anyways to not risk a deadlock with
457    // h/w composer.
458
459    const DisplayHardware& hw(graphicPlane(0).displayHardware());
460    const nsecs_t now = systemTime();
461    mDebugInSwapBuffers = now;
462    hw.flip(mSwapRegion);
463
464    size_t numLayers = mVisibleLayersSortedByZ.size();
465    for (size_t i = 0; i < numLayers; i++) {
466        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
467    }
468
469    mLastSwapBufferTime = systemTime() - now;
470    mDebugInSwapBuffers = 0;
471    mSwapRegion.clear();
472}
473
474void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
475{
476    ATRACE_CALL();
477
478    Mutex::Autolock _l(mStateLock);
479    const nsecs_t now = systemTime();
480    mDebugInTransaction = now;
481
482    // Here we're guaranteed that some transaction flags are set
483    // so we can call handleTransactionLocked() unconditionally.
484    // We call getTransactionFlags(), which will also clear the flags,
485    // with mStateLock held to guarantee that mCurrentState won't change
486    // until the transaction is committed.
487
488    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
489    transactionFlags = getTransactionFlags(mask);
490    handleTransactionLocked(transactionFlags);
491
492    mLastTransactionTime = systemTime() - now;
493    mDebugInTransaction = 0;
494    invalidateHwcGeometry();
495    // here the transaction has been committed
496}
497
498void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
499{
500    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
501    const size_t count = currentLayers.size();
502
503    /*
504     * Traversal of the children
505     * (perform the transaction for each of them if needed)
506     */
507
508    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
509    if (layersNeedTransaction) {
510        for (size_t i=0 ; i<count ; i++) {
511            const sp<LayerBase>& layer = currentLayers[i];
512            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
513            if (!trFlags) continue;
514
515            const uint32_t flags = layer->doTransaction(0);
516            if (flags & Layer::eVisibleRegion)
517                mVisibleRegionsDirty = true;
518        }
519    }
520
521    /*
522     * Perform our own transaction if needed
523     */
524
525    if (transactionFlags & eTransactionNeeded) {
526        if (mCurrentState.orientation != mDrawingState.orientation) {
527            // the orientation has changed, recompute all visible regions
528            // and invalidate everything.
529
530            const int dpy = 0;
531            const int orientation = mCurrentState.orientation;
532            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
533            GraphicPlane& plane(graphicPlane(dpy));
534            plane.setOrientation(orientation);
535
536            // update the shared control block
537            const DisplayHardware& hw(plane.displayHardware());
538            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
539            dcblk->orientation = orientation;
540            dcblk->w = plane.getWidth();
541            dcblk->h = plane.getHeight();
542
543            mVisibleRegionsDirty = true;
544            mDirtyRegion.set(hw.bounds());
545        }
546
547        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
548            // layers have been added
549            mVisibleRegionsDirty = true;
550        }
551
552        // some layers might have been removed, so
553        // we need to update the regions they're exposing.
554        if (mLayersRemoved) {
555            mLayersRemoved = false;
556            mVisibleRegionsDirty = true;
557            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
558            const size_t count = previousLayers.size();
559            for (size_t i=0 ; i<count ; i++) {
560                const sp<LayerBase>& layer(previousLayers[i]);
561                if (currentLayers.indexOf( layer ) < 0) {
562                    // this layer is not visible anymore
563                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
564                }
565            }
566        }
567    }
568
569    commitTransaction();
570}
571
572void SurfaceFlinger::computeVisibleRegions(
573    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
574{
575    ATRACE_CALL();
576
577    const GraphicPlane& plane(graphicPlane(0));
578    const Transform& planeTransform(plane.transform());
579    const DisplayHardware& hw(plane.displayHardware());
580    const Region screenRegion(hw.bounds());
581
582    Region aboveOpaqueLayers;
583    Region aboveCoveredLayers;
584    Region dirty;
585
586    bool secureFrameBuffer = false;
587
588    size_t i = currentLayers.size();
589    while (i--) {
590        const sp<LayerBase>& layer = currentLayers[i];
591        layer->validateVisibility(planeTransform);
592
593        // start with the whole surface at its current location
594        const Layer::State& s(layer->drawingState());
595
596        /*
597         * opaqueRegion: area of a surface that is fully opaque.
598         */
599        Region opaqueRegion;
600
601        /*
602         * visibleRegion: area of a surface that is visible on screen
603         * and not fully transparent. This is essentially the layer's
604         * footprint minus the opaque regions above it.
605         * Areas covered by a translucent surface are considered visible.
606         */
607        Region visibleRegion;
608
609        /*
610         * coveredRegion: area of a surface that is covered by all
611         * visible regions above it (which includes the translucent areas).
612         */
613        Region coveredRegion;
614
615
616        // handle hidden surfaces by setting the visible region to empty
617        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
618            const bool translucent = !layer->isOpaque();
619            const Rect bounds(layer->visibleBounds());
620            visibleRegion.set(bounds);
621            visibleRegion.andSelf(screenRegion);
622            if (!visibleRegion.isEmpty()) {
623                // Remove the transparent area from the visible region
624                if (translucent) {
625                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
626                }
627
628                // compute the opaque region
629                const int32_t layerOrientation = layer->getOrientation();
630                if (s.alpha==255 && !translucent &&
631                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
632                    // the opaque region is the layer's footprint
633                    opaqueRegion = visibleRegion;
634                }
635            }
636        }
637
638        // Clip the covered region to the visible region
639        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
640
641        // Update aboveCoveredLayers for next (lower) layer
642        aboveCoveredLayers.orSelf(visibleRegion);
643
644        // subtract the opaque region covered by the layers above us
645        visibleRegion.subtractSelf(aboveOpaqueLayers);
646
647        // compute this layer's dirty region
648        if (layer->contentDirty) {
649            // we need to invalidate the whole region
650            dirty = visibleRegion;
651            // as well, as the old visible region
652            dirty.orSelf(layer->visibleRegionScreen);
653            layer->contentDirty = false;
654        } else {
655            /* compute the exposed region:
656             *   the exposed region consists of two components:
657             *   1) what's VISIBLE now and was COVERED before
658             *   2) what's EXPOSED now less what was EXPOSED before
659             *
660             * note that (1) is conservative, we start with the whole
661             * visible region but only keep what used to be covered by
662             * something -- which mean it may have been exposed.
663             *
664             * (2) handles areas that were not covered by anything but got
665             * exposed because of a resize.
666             */
667            const Region newExposed = visibleRegion - coveredRegion;
668            const Region oldVisibleRegion = layer->visibleRegionScreen;
669            const Region oldCoveredRegion = layer->coveredRegionScreen;
670            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
671            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
672        }
673        dirty.subtractSelf(aboveOpaqueLayers);
674
675        // accumulate to the screen dirty region
676        dirtyRegion.orSelf(dirty);
677
678        // Update aboveOpaqueLayers for next (lower) layer
679        aboveOpaqueLayers.orSelf(opaqueRegion);
680
681        // Store the visible region is screen space
682        layer->setVisibleRegion(visibleRegion);
683        layer->setCoveredRegion(coveredRegion);
684
685        // If a secure layer is partially visible, lock-down the screen!
686        if (layer->isSecure() && !visibleRegion.isEmpty()) {
687            secureFrameBuffer = true;
688        }
689    }
690
691    // invalidate the areas where a layer was removed
692    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
693    mDirtyRegionRemovedLayer.clear();
694
695    mSecureFrameBuffer = secureFrameBuffer;
696    opaqueRegion = aboveOpaqueLayers;
697}
698
699
700void SurfaceFlinger::commitTransaction()
701{
702    if (!mLayersPendingRemoval.isEmpty()) {
703        // Notify removed layers now that they can't be drawn from
704        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
705            mLayersPendingRemoval[i]->onRemoved();
706        }
707        mLayersPendingRemoval.clear();
708    }
709
710    mDrawingState = mCurrentState;
711    mTransationPending = false;
712    mTransactionCV.broadcast();
713}
714
715void SurfaceFlinger::handlePageFlip()
716{
717    ATRACE_CALL();
718    const DisplayHardware& hw = graphicPlane(0).displayHardware();
719    const Region screenRegion(hw.bounds());
720
721    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
722    const bool visibleRegions = lockPageFlip(currentLayers);
723
724        if (visibleRegions || mVisibleRegionsDirty) {
725            Region opaqueRegion;
726            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
727
728            /*
729             *  rebuild the visible layer list
730             */
731            const size_t count = currentLayers.size();
732            mVisibleLayersSortedByZ.clear();
733            mVisibleLayersSortedByZ.setCapacity(count);
734            for (size_t i=0 ; i<count ; i++) {
735                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
736                    mVisibleLayersSortedByZ.add(currentLayers[i]);
737            }
738
739            mWormholeRegion = screenRegion.subtract(opaqueRegion);
740            mVisibleRegionsDirty = false;
741            invalidateHwcGeometry();
742        }
743
744    unlockPageFlip(currentLayers);
745
746    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
747    mDirtyRegion.andSelf(screenRegion);
748}
749
750void SurfaceFlinger::invalidateHwcGeometry()
751{
752    mHwWorkListDirty = true;
753}
754
755bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
756{
757    bool recomputeVisibleRegions = false;
758    size_t count = currentLayers.size();
759    sp<LayerBase> const* layers = currentLayers.array();
760    for (size_t i=0 ; i<count ; i++) {
761        const sp<LayerBase>& layer(layers[i]);
762        layer->lockPageFlip(recomputeVisibleRegions);
763    }
764    return recomputeVisibleRegions;
765}
766
767void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
768{
769    const GraphicPlane& plane(graphicPlane(0));
770    const Transform& planeTransform(plane.transform());
771    const size_t count = currentLayers.size();
772    sp<LayerBase> const* layers = currentLayers.array();
773    for (size_t i=0 ; i<count ; i++) {
774        const sp<LayerBase>& layer(layers[i]);
775        layer->unlockPageFlip(planeTransform, mDirtyRegion);
776    }
777}
778
779void SurfaceFlinger::handleRefresh()
780{
781    bool needInvalidate = false;
782    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
783    const size_t count = currentLayers.size();
784    for (size_t i=0 ; i<count ; i++) {
785        const sp<LayerBase>& layer(currentLayers[i]);
786        if (layer->onPreComposition()) {
787            needInvalidate = true;
788        }
789    }
790    if (needInvalidate) {
791        signalLayerUpdate();
792    }
793}
794
795
796void SurfaceFlinger::handleWorkList()
797{
798    mHwWorkListDirty = false;
799    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
800    if (hwc.initCheck() == NO_ERROR) {
801        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
802        const size_t count = currentLayers.size();
803        hwc.createWorkList(count);
804
805        HWComposer::LayerListIterator cur = hwc.begin();
806        const HWComposer::LayerListIterator end = hwc.end();
807        for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
808            currentLayers[i]->setGeometry(*cur);
809            if (mDebugDisableHWC || mDebugRegion) {
810                cur->setSkip(true);
811            }
812        }
813    }
814}
815
816void SurfaceFlinger::handleRepaint()
817{
818    ATRACE_CALL();
819
820    // compute the invalid region
821    mSwapRegion.orSelf(mDirtyRegion);
822
823    if (CC_UNLIKELY(mDebugRegion)) {
824        debugFlashRegions();
825    }
826
827    // set the frame buffer
828    const DisplayHardware& hw(graphicPlane(0).displayHardware());
829    glMatrixMode(GL_MODELVIEW);
830    glLoadIdentity();
831
832    uint32_t flags = hw.getFlags();
833    if (flags & DisplayHardware::SWAP_RECTANGLE) {
834        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
835        // takes a rectangle, we must make sure to update that whole
836        // rectangle in that case
837        mDirtyRegion.set(mSwapRegion.bounds());
838    } else {
839        if (flags & DisplayHardware::PARTIAL_UPDATES) {
840            // We need to redraw the rectangle that will be updated
841            // (pushed to the framebuffer).
842            // This is needed because PARTIAL_UPDATES only takes one
843            // rectangle instead of a region (see DisplayHardware::flip())
844            mDirtyRegion.set(mSwapRegion.bounds());
845        } else {
846            // we need to redraw everything (the whole screen)
847            mDirtyRegion.set(hw.bounds());
848            mSwapRegion = mDirtyRegion;
849        }
850    }
851
852    setupHardwareComposer();
853    composeSurfaces(mDirtyRegion);
854
855    // update the swap region and clear the dirty region
856    mSwapRegion.orSelf(mDirtyRegion);
857    mDirtyRegion.clear();
858}
859
860void SurfaceFlinger::setupHardwareComposer()
861{
862    const DisplayHardware& hw(graphicPlane(0).displayHardware());
863    HWComposer& hwc(hw.getHwComposer());
864
865    HWComposer::LayerListIterator cur = hwc.begin();
866    const HWComposer::LayerListIterator end = hwc.end();
867    if (cur == end) {
868        return;
869    }
870
871    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
872    size_t count = layers.size();
873
874    ALOGE_IF(hwc.getNumLayers() != count,
875            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
876            hwc.getNumLayers(), count);
877
878    // just to be extra-safe, use the smallest count
879    if (hwc.initCheck() == NO_ERROR) {
880        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
881    }
882
883    /*
884     *  update the per-frame h/w composer data for each layer
885     *  and build the transparent region of the FB
886     */
887    for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
888        const sp<LayerBase>& layer(layers[i]);
889        layer->setPerFrameData(*cur);
890    }
891    status_t err = hwc.prepare();
892    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
893}
894
895void SurfaceFlinger::composeSurfaces(const Region& dirty)
896{
897    const DisplayHardware& hw(graphicPlane(0).displayHardware());
898    HWComposer& hwc(hw.getHwComposer());
899    HWComposer::LayerListIterator cur = hwc.begin();
900    const HWComposer::LayerListIterator end = hwc.end();
901
902    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
903    if (cur==end || fbLayerCount) {
904        // Never touch the framebuffer if we don't have any framebuffer layers
905
906        if (hwc.getLayerCount(HWC_OVERLAY)) {
907            // when using overlays, we assume a fully transparent framebuffer
908            // NOTE: we could reduce how much we need to clear, for instance
909            // remove where there are opaque FB layers. however, on some
910            // GPUs doing a "clean slate" glClear might be more efficient.
911            // We'll revisit later if needed.
912            glClearColor(0, 0, 0, 0);
913            glClear(GL_COLOR_BUFFER_BIT);
914        } else {
915            // screen is already cleared here
916            if (!mWormholeRegion.isEmpty()) {
917                // can happen with SurfaceView
918                drawWormhole();
919            }
920        }
921
922        /*
923         * and then, render the layers targeted at the framebuffer
924         */
925
926        const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
927        const size_t count = layers.size();
928        for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
929            const sp<LayerBase>& layer(layers[i]);
930            const Region clip(dirty.intersect(layer->visibleRegionScreen));
931            if (!clip.isEmpty()) {
932                if (cur->getCompositionType() == HWC_OVERLAY) {
933                    if (i && (cur->getHints() & HWC_HINT_CLEAR_FB)
934                            && layer->isOpaque()) {
935                        // never clear the very first layer since we're
936                        // guaranteed the FB is already cleared
937                        layer->clearWithOpenGL(clip);
938                    }
939                    continue;
940                }
941                // render the layer
942                layer->draw(clip);
943            }
944        }
945    }
946}
947
948void SurfaceFlinger::debugFlashRegions()
949{
950    const DisplayHardware& hw(graphicPlane(0).displayHardware());
951    const uint32_t flags = hw.getFlags();
952    const int32_t height = hw.getHeight();
953    if (mSwapRegion.isEmpty()) {
954        return;
955    }
956
957    if (!(flags & DisplayHardware::SWAP_RECTANGLE)) {
958        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
959                mDirtyRegion.bounds() : hw.bounds());
960        composeSurfaces(repaint);
961    }
962
963    glDisable(GL_TEXTURE_EXTERNAL_OES);
964    glDisable(GL_TEXTURE_2D);
965    glDisable(GL_BLEND);
966
967    static int toggle = 0;
968    toggle = 1 - toggle;
969    if (toggle) {
970        glColor4f(1, 0, 1, 1);
971    } else {
972        glColor4f(1, 1, 0, 1);
973    }
974
975    Region::const_iterator it = mDirtyRegion.begin();
976    Region::const_iterator const end = mDirtyRegion.end();
977    while (it != end) {
978        const Rect& r = *it++;
979        GLfloat vertices[][2] = {
980                { r.left,  height - r.top },
981                { r.left,  height - r.bottom },
982                { r.right, height - r.bottom },
983                { r.right, height - r.top }
984        };
985        glVertexPointer(2, GL_FLOAT, 0, vertices);
986        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
987    }
988
989    hw.flip(mSwapRegion);
990
991    if (mDebugRegion > 1)
992        usleep(mDebugRegion * 1000);
993}
994
995void SurfaceFlinger::drawWormhole() const
996{
997    const Region region(mWormholeRegion.intersect(mDirtyRegion));
998    if (region.isEmpty())
999        return;
1000
1001    glDisable(GL_TEXTURE_EXTERNAL_OES);
1002    glDisable(GL_TEXTURE_2D);
1003    glDisable(GL_BLEND);
1004    glColor4f(0,0,0,0);
1005
1006    GLfloat vertices[4][2];
1007    glVertexPointer(2, GL_FLOAT, 0, vertices);
1008    Region::const_iterator it = region.begin();
1009    Region::const_iterator const end = region.end();
1010    while (it != end) {
1011        const Rect& r = *it++;
1012        vertices[0][0] = r.left;
1013        vertices[0][1] = r.top;
1014        vertices[1][0] = r.right;
1015        vertices[1][1] = r.top;
1016        vertices[2][0] = r.right;
1017        vertices[2][1] = r.bottom;
1018        vertices[3][0] = r.left;
1019        vertices[3][1] = r.bottom;
1020        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1021    }
1022}
1023
1024status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1025{
1026    Mutex::Autolock _l(mStateLock);
1027    addLayer_l(layer);
1028    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1029    return NO_ERROR;
1030}
1031
1032status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1033{
1034    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1035    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1036}
1037
1038ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1039        const sp<LayerBaseClient>& lbc)
1040{
1041    // attach this layer to the client
1042    size_t name = client->attachLayer(lbc);
1043
1044    Mutex::Autolock _l(mStateLock);
1045
1046    // add this layer to the current state list
1047    addLayer_l(lbc);
1048
1049    return ssize_t(name);
1050}
1051
1052status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1053{
1054    Mutex::Autolock _l(mStateLock);
1055    status_t err = purgatorizeLayer_l(layer);
1056    if (err == NO_ERROR)
1057        setTransactionFlags(eTransactionNeeded);
1058    return err;
1059}
1060
1061status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1062{
1063    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1064    if (lbc != 0) {
1065        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1066    }
1067    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1068    if (index >= 0) {
1069        mLayersRemoved = true;
1070        return NO_ERROR;
1071    }
1072    return status_t(index);
1073}
1074
1075status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1076{
1077    // First add the layer to the purgatory list, which makes sure it won't
1078    // go away, then remove it from the main list (through a transaction).
1079    ssize_t err = removeLayer_l(layerBase);
1080    if (err >= 0) {
1081        mLayerPurgatory.add(layerBase);
1082    }
1083
1084    mLayersPendingRemoval.push(layerBase);
1085
1086    // it's possible that we don't find a layer, because it might
1087    // have been destroyed already -- this is not technically an error
1088    // from the user because there is a race between Client::destroySurface(),
1089    // ~Client() and ~ISurface().
1090    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1091}
1092
1093status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1094{
1095    layer->forceVisibilityTransaction();
1096    setTransactionFlags(eTraversalNeeded);
1097    return NO_ERROR;
1098}
1099
1100uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1101{
1102    return android_atomic_release_load(&mTransactionFlags);
1103}
1104
1105uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1106{
1107    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1108}
1109
1110uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1111{
1112    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1113    if ((old & flags)==0) { // wake the server up
1114        signalTransaction();
1115    }
1116    return old;
1117}
1118
1119
1120void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1121        int orientation, uint32_t flags) {
1122    Mutex::Autolock _l(mStateLock);
1123
1124    uint32_t transactionFlags = 0;
1125    if (mCurrentState.orientation != orientation) {
1126        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1127            mCurrentState.orientation = orientation;
1128            transactionFlags |= eTransactionNeeded;
1129        } else if (orientation != eOrientationUnchanged) {
1130            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1131                    orientation);
1132        }
1133    }
1134
1135    const size_t count = state.size();
1136    for (size_t i=0 ; i<count ; i++) {
1137        const ComposerState& s(state[i]);
1138        sp<Client> client( static_cast<Client *>(s.client.get()) );
1139        transactionFlags |= setClientStateLocked(client, s.state);
1140    }
1141
1142    if (transactionFlags) {
1143        // this triggers the transaction
1144        setTransactionFlags(transactionFlags);
1145
1146        // if this is a synchronous transaction, wait for it to take effect
1147        // before returning.
1148        if (flags & eSynchronous) {
1149            mTransationPending = true;
1150        }
1151        while (mTransationPending) {
1152            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1153            if (CC_UNLIKELY(err != NO_ERROR)) {
1154                // just in case something goes wrong in SF, return to the
1155                // called after a few seconds.
1156                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1157                mTransationPending = false;
1158                break;
1159            }
1160        }
1161    }
1162}
1163
1164sp<ISurface> SurfaceFlinger::createSurface(
1165        ISurfaceComposerClient::surface_data_t* params,
1166        const String8& name,
1167        const sp<Client>& client,
1168        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1169        uint32_t flags)
1170{
1171    sp<LayerBaseClient> layer;
1172    sp<ISurface> surfaceHandle;
1173
1174    if (int32_t(w|h) < 0) {
1175        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1176                int(w), int(h));
1177        return surfaceHandle;
1178    }
1179
1180    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1181    sp<Layer> normalLayer;
1182    switch (flags & eFXSurfaceMask) {
1183        case eFXSurfaceNormal:
1184            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1185            layer = normalLayer;
1186            break;
1187        case eFXSurfaceBlur:
1188            // for now we treat Blur as Dim, until we can implement it
1189            // efficiently.
1190        case eFXSurfaceDim:
1191            layer = createDimSurface(client, d, w, h, flags);
1192            break;
1193        case eFXSurfaceScreenshot:
1194            layer = createScreenshotSurface(client, d, w, h, flags);
1195            break;
1196    }
1197
1198    if (layer != 0) {
1199        layer->initStates(w, h, flags);
1200        layer->setName(name);
1201        ssize_t token = addClientLayer(client, layer);
1202
1203        surfaceHandle = layer->getSurface();
1204        if (surfaceHandle != 0) {
1205            params->token = token;
1206            params->identity = layer->getIdentity();
1207            if (normalLayer != 0) {
1208                Mutex::Autolock _l(mStateLock);
1209                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1210            }
1211        }
1212
1213        setTransactionFlags(eTransactionNeeded);
1214    }
1215
1216    return surfaceHandle;
1217}
1218
1219sp<Layer> SurfaceFlinger::createNormalSurface(
1220        const sp<Client>& client, DisplayID display,
1221        uint32_t w, uint32_t h, uint32_t flags,
1222        PixelFormat& format)
1223{
1224    // initialize the surfaces
1225    switch (format) { // TODO: take h/w into account
1226    case PIXEL_FORMAT_TRANSPARENT:
1227    case PIXEL_FORMAT_TRANSLUCENT:
1228        format = PIXEL_FORMAT_RGBA_8888;
1229        break;
1230    case PIXEL_FORMAT_OPAQUE:
1231#ifdef NO_RGBX_8888
1232        format = PIXEL_FORMAT_RGB_565;
1233#else
1234        format = PIXEL_FORMAT_RGBX_8888;
1235#endif
1236        break;
1237    }
1238
1239#ifdef NO_RGBX_8888
1240    if (format == PIXEL_FORMAT_RGBX_8888)
1241        format = PIXEL_FORMAT_RGBA_8888;
1242#endif
1243
1244    sp<Layer> layer = new Layer(this, display, client);
1245    status_t err = layer->setBuffers(w, h, format, flags);
1246    if (CC_LIKELY(err != NO_ERROR)) {
1247        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1248        layer.clear();
1249    }
1250    return layer;
1251}
1252
1253sp<LayerDim> SurfaceFlinger::createDimSurface(
1254        const sp<Client>& client, DisplayID display,
1255        uint32_t w, uint32_t h, uint32_t flags)
1256{
1257    sp<LayerDim> layer = new LayerDim(this, display, client);
1258    return layer;
1259}
1260
1261sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1262        const sp<Client>& client, DisplayID display,
1263        uint32_t w, uint32_t h, uint32_t flags)
1264{
1265    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1266    return layer;
1267}
1268
1269status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1270{
1271    /*
1272     * called by the window manager, when a surface should be marked for
1273     * destruction.
1274     *
1275     * The surface is removed from the current and drawing lists, but placed
1276     * in the purgatory queue, so it's not destroyed right-away (we need
1277     * to wait for all client's references to go away first).
1278     */
1279
1280    status_t err = NAME_NOT_FOUND;
1281    Mutex::Autolock _l(mStateLock);
1282    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1283
1284    if (layer != 0) {
1285        err = purgatorizeLayer_l(layer);
1286        if (err == NO_ERROR) {
1287            setTransactionFlags(eTransactionNeeded);
1288        }
1289    }
1290    return err;
1291}
1292
1293status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1294{
1295    // called by ~ISurface() when all references are gone
1296    status_t err = NO_ERROR;
1297    sp<LayerBaseClient> l(layer.promote());
1298    if (l != NULL) {
1299        Mutex::Autolock _l(mStateLock);
1300        err = removeLayer_l(l);
1301        if (err == NAME_NOT_FOUND) {
1302            // The surface wasn't in the current list, which means it was
1303            // removed already, which means it is in the purgatory,
1304            // and need to be removed from there.
1305            ssize_t idx = mLayerPurgatory.remove(l);
1306            ALOGE_IF(idx < 0,
1307                    "layer=%p is not in the purgatory list", l.get());
1308        }
1309        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1310                "error removing layer=%p (%s)", l.get(), strerror(-err));
1311    }
1312    return err;
1313}
1314
1315uint32_t SurfaceFlinger::setClientStateLocked(
1316        const sp<Client>& client,
1317        const layer_state_t& s)
1318{
1319    uint32_t flags = 0;
1320    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1321    if (layer != 0) {
1322        const uint32_t what = s.what;
1323        if (what & ePositionChanged) {
1324            if (layer->setPosition(s.x, s.y))
1325                flags |= eTraversalNeeded;
1326        }
1327        if (what & eLayerChanged) {
1328            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1329            if (layer->setLayer(s.z)) {
1330                mCurrentState.layersSortedByZ.removeAt(idx);
1331                mCurrentState.layersSortedByZ.add(layer);
1332                // we need traversal (state changed)
1333                // AND transaction (list changed)
1334                flags |= eTransactionNeeded|eTraversalNeeded;
1335            }
1336        }
1337        if (what & eSizeChanged) {
1338            if (layer->setSize(s.w, s.h)) {
1339                flags |= eTraversalNeeded;
1340            }
1341        }
1342        if (what & eAlphaChanged) {
1343            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1344                flags |= eTraversalNeeded;
1345        }
1346        if (what & eMatrixChanged) {
1347            if (layer->setMatrix(s.matrix))
1348                flags |= eTraversalNeeded;
1349        }
1350        if (what & eTransparentRegionChanged) {
1351            if (layer->setTransparentRegionHint(s.transparentRegion))
1352                flags |= eTraversalNeeded;
1353        }
1354        if (what & eVisibilityChanged) {
1355            if (layer->setFlags(s.flags, s.mask))
1356                flags |= eTraversalNeeded;
1357        }
1358        if (what & eCropChanged) {
1359            if (layer->setCrop(s.crop))
1360                flags |= eTraversalNeeded;
1361        }
1362    }
1363    return flags;
1364}
1365
1366// ---------------------------------------------------------------------------
1367
1368void SurfaceFlinger::onScreenAcquired() {
1369    ALOGD("Screen about to return, flinger = %p", this);
1370    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1371    hw.acquireScreen();
1372    mEventThread->onScreenAcquired();
1373    // this is a temporary work-around, eventually this should be called
1374    // by the power-manager
1375    SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
1376    // from this point on, SF will process updates again
1377    repaintEverything();
1378}
1379
1380void SurfaceFlinger::onScreenReleased() {
1381    ALOGD("About to give-up screen, flinger = %p", this);
1382    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1383    if (hw.isScreenAcquired()) {
1384        mEventThread->onScreenReleased();
1385        hw.releaseScreen();
1386        // from this point on, SF will stop drawing
1387    }
1388}
1389
1390void SurfaceFlinger::unblank() {
1391    class MessageScreenAcquired : public MessageBase {
1392        SurfaceFlinger* flinger;
1393    public:
1394        MessageScreenAcquired(SurfaceFlinger* flinger) : flinger(flinger) { }
1395        virtual bool handler() {
1396            flinger->onScreenAcquired();
1397            return true;
1398        }
1399    };
1400    sp<MessageBase> msg = new MessageScreenAcquired(this);
1401    postMessageSync(msg);
1402}
1403
1404void SurfaceFlinger::blank() {
1405    class MessageScreenReleased : public MessageBase {
1406        SurfaceFlinger* flinger;
1407    public:
1408        MessageScreenReleased(SurfaceFlinger* flinger) : flinger(flinger) { }
1409        virtual bool handler() {
1410            flinger->onScreenReleased();
1411            return true;
1412        }
1413    };
1414    sp<MessageBase> msg = new MessageScreenReleased(this);
1415    postMessageSync(msg);
1416}
1417
1418// ---------------------------------------------------------------------------
1419
1420status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1421{
1422    const size_t SIZE = 4096;
1423    char buffer[SIZE];
1424    String8 result;
1425
1426    if (!PermissionCache::checkCallingPermission(sDump)) {
1427        snprintf(buffer, SIZE, "Permission Denial: "
1428                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1429                IPCThreadState::self()->getCallingPid(),
1430                IPCThreadState::self()->getCallingUid());
1431        result.append(buffer);
1432    } else {
1433        // Try to get the main lock, but don't insist if we can't
1434        // (this would indicate SF is stuck, but we want to be able to
1435        // print something in dumpsys).
1436        int retry = 3;
1437        while (mStateLock.tryLock()<0 && --retry>=0) {
1438            usleep(1000000);
1439        }
1440        const bool locked(retry >= 0);
1441        if (!locked) {
1442            snprintf(buffer, SIZE,
1443                    "SurfaceFlinger appears to be unresponsive, "
1444                    "dumping anyways (no locks held)\n");
1445            result.append(buffer);
1446        }
1447
1448        bool dumpAll = true;
1449        size_t index = 0;
1450        size_t numArgs = args.size();
1451        if (numArgs) {
1452            if ((index < numArgs) &&
1453                    (args[index] == String16("--list"))) {
1454                index++;
1455                listLayersLocked(args, index, result, buffer, SIZE);
1456                dumpAll = false;
1457            }
1458
1459            if ((index < numArgs) &&
1460                    (args[index] == String16("--latency"))) {
1461                index++;
1462                dumpStatsLocked(args, index, result, buffer, SIZE);
1463                dumpAll = false;
1464            }
1465
1466            if ((index < numArgs) &&
1467                    (args[index] == String16("--latency-clear"))) {
1468                index++;
1469                clearStatsLocked(args, index, result, buffer, SIZE);
1470                dumpAll = false;
1471            }
1472        }
1473
1474        if (dumpAll) {
1475            dumpAllLocked(result, buffer, SIZE);
1476        }
1477
1478        if (locked) {
1479            mStateLock.unlock();
1480        }
1481    }
1482    write(fd, result.string(), result.size());
1483    return NO_ERROR;
1484}
1485
1486void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1487        String8& result, char* buffer, size_t SIZE) const
1488{
1489    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1490    const size_t count = currentLayers.size();
1491    for (size_t i=0 ; i<count ; i++) {
1492        const sp<LayerBase>& layer(currentLayers[i]);
1493        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1494        result.append(buffer);
1495    }
1496}
1497
1498void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1499        String8& result, char* buffer, size_t SIZE) const
1500{
1501    String8 name;
1502    if (index < args.size()) {
1503        name = String8(args[index]);
1504        index++;
1505    }
1506
1507    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1508    const size_t count = currentLayers.size();
1509    for (size_t i=0 ; i<count ; i++) {
1510        const sp<LayerBase>& layer(currentLayers[i]);
1511        if (name.isEmpty()) {
1512            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1513            result.append(buffer);
1514        }
1515        if (name.isEmpty() || (name == layer->getName())) {
1516            layer->dumpStats(result, buffer, SIZE);
1517        }
1518    }
1519}
1520
1521void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1522        String8& result, char* buffer, size_t SIZE) const
1523{
1524    String8 name;
1525    if (index < args.size()) {
1526        name = String8(args[index]);
1527        index++;
1528    }
1529
1530    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1531    const size_t count = currentLayers.size();
1532    for (size_t i=0 ; i<count ; i++) {
1533        const sp<LayerBase>& layer(currentLayers[i]);
1534        if (name.isEmpty() || (name == layer->getName())) {
1535            layer->clearStats();
1536        }
1537    }
1538}
1539
1540void SurfaceFlinger::dumpAllLocked(
1541        String8& result, char* buffer, size_t SIZE) const
1542{
1543    // figure out if we're stuck somewhere
1544    const nsecs_t now = systemTime();
1545    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1546    const nsecs_t inTransaction(mDebugInTransaction);
1547    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1548    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1549
1550    /*
1551     * Dump the visible layer list
1552     */
1553    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1554    const size_t count = currentLayers.size();
1555    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1556    result.append(buffer);
1557    for (size_t i=0 ; i<count ; i++) {
1558        const sp<LayerBase>& layer(currentLayers[i]);
1559        layer->dump(result, buffer, SIZE);
1560    }
1561
1562    /*
1563     * Dump the layers in the purgatory
1564     */
1565
1566    const size_t purgatorySize = mLayerPurgatory.size();
1567    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1568    result.append(buffer);
1569    for (size_t i=0 ; i<purgatorySize ; i++) {
1570        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1571        layer->shortDump(result, buffer, SIZE);
1572    }
1573
1574    /*
1575     * Dump SurfaceFlinger global state
1576     */
1577
1578    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1579    result.append(buffer);
1580
1581    const GLExtensions& extensions(GLExtensions::getInstance());
1582    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1583            extensions.getVendor(),
1584            extensions.getRenderer(),
1585            extensions.getVersion());
1586    result.append(buffer);
1587
1588    snprintf(buffer, SIZE, "EGL : %s\n",
1589            eglQueryString(graphicPlane(0).getEGLDisplay(),
1590                    EGL_VERSION_HW_ANDROID));
1591    result.append(buffer);
1592
1593    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1594    result.append(buffer);
1595
1596    mWormholeRegion.dump(result, "WormholeRegion");
1597    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1598    snprintf(buffer, SIZE,
1599            "  orientation=%d, canDraw=%d\n",
1600            mCurrentState.orientation, hw.canDraw());
1601    result.append(buffer);
1602    snprintf(buffer, SIZE,
1603            "  last eglSwapBuffers() time: %f us\n"
1604            "  last transaction time     : %f us\n"
1605            "  transaction-flags         : %08x\n"
1606            "  refresh-rate              : %f fps\n"
1607            "  x-dpi                     : %f\n"
1608            "  y-dpi                     : %f\n"
1609            "  density                   : %f\n",
1610            mLastSwapBufferTime/1000.0,
1611            mLastTransactionTime/1000.0,
1612            mTransactionFlags,
1613            hw.getRefreshRate(),
1614            hw.getDpiX(),
1615            hw.getDpiY(),
1616            hw.getDensity());
1617    result.append(buffer);
1618
1619    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1620            inSwapBuffersDuration/1000.0);
1621    result.append(buffer);
1622
1623    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1624            inTransactionDuration/1000.0);
1625    result.append(buffer);
1626
1627    /*
1628     * VSYNC state
1629     */
1630    mEventThread->dump(result, buffer, SIZE);
1631
1632    /*
1633     * Dump HWComposer state
1634     */
1635    HWComposer& hwc(hw.getHwComposer());
1636    snprintf(buffer, SIZE, "h/w composer state:\n");
1637    result.append(buffer);
1638    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1639            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1640                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1641    result.append(buffer);
1642    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1643
1644    /*
1645     * Dump gralloc state
1646     */
1647    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1648    alloc.dump(result);
1649    hw.dump(result);
1650}
1651
1652status_t SurfaceFlinger::onTransact(
1653    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1654{
1655    switch (code) {
1656        case CREATE_CONNECTION:
1657        case SET_TRANSACTION_STATE:
1658        case SET_ORIENTATION:
1659        case BOOT_FINISHED:
1660        case TURN_ELECTRON_BEAM_OFF:
1661        case TURN_ELECTRON_BEAM_ON:
1662        case BLANK:
1663        case UNBLANK:
1664        {
1665            // codes that require permission check
1666            IPCThreadState* ipc = IPCThreadState::self();
1667            const int pid = ipc->getCallingPid();
1668            const int uid = ipc->getCallingUid();
1669            if ((uid != AID_GRAPHICS) &&
1670                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1671                ALOGE("Permission Denial: "
1672                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1673                return PERMISSION_DENIED;
1674            }
1675            break;
1676        }
1677        case CAPTURE_SCREEN:
1678        {
1679            // codes that require permission check
1680            IPCThreadState* ipc = IPCThreadState::self();
1681            const int pid = ipc->getCallingPid();
1682            const int uid = ipc->getCallingUid();
1683            if ((uid != AID_GRAPHICS) &&
1684                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1685                ALOGE("Permission Denial: "
1686                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1687                return PERMISSION_DENIED;
1688            }
1689            break;
1690        }
1691    }
1692
1693    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1694    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1695        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1696        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1697            IPCThreadState* ipc = IPCThreadState::self();
1698            const int pid = ipc->getCallingPid();
1699            const int uid = ipc->getCallingUid();
1700            ALOGE("Permission Denial: "
1701                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1702            return PERMISSION_DENIED;
1703        }
1704        int n;
1705        switch (code) {
1706            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1707            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1708                return NO_ERROR;
1709            case 1002:  // SHOW_UPDATES
1710                n = data.readInt32();
1711                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1712                invalidateHwcGeometry();
1713                repaintEverything();
1714                return NO_ERROR;
1715            case 1004:{ // repaint everything
1716                repaintEverything();
1717                return NO_ERROR;
1718            }
1719            case 1005:{ // force transaction
1720                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1721                return NO_ERROR;
1722            }
1723            case 1006:{ // send empty update
1724                signalRefresh();
1725                return NO_ERROR;
1726            }
1727            case 1008:  // toggle use of hw composer
1728                n = data.readInt32();
1729                mDebugDisableHWC = n ? 1 : 0;
1730                invalidateHwcGeometry();
1731                repaintEverything();
1732                return NO_ERROR;
1733            case 1009:  // toggle use of transform hint
1734                n = data.readInt32();
1735                mDebugDisableTransformHint = n ? 1 : 0;
1736                invalidateHwcGeometry();
1737                repaintEverything();
1738                return NO_ERROR;
1739            case 1010:  // interrogate.
1740                reply->writeInt32(0);
1741                reply->writeInt32(0);
1742                reply->writeInt32(mDebugRegion);
1743                reply->writeInt32(0);
1744                reply->writeInt32(mDebugDisableHWC);
1745                return NO_ERROR;
1746            case 1013: {
1747                Mutex::Autolock _l(mStateLock);
1748                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1749                reply->writeInt32(hw.getPageFlipCount());
1750            }
1751            return NO_ERROR;
1752        }
1753    }
1754    return err;
1755}
1756
1757void SurfaceFlinger::repaintEverything() {
1758    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1759    const Rect bounds(hw.getBounds());
1760    setInvalidateRegion(Region(bounds));
1761    signalTransaction();
1762}
1763
1764void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1765    Mutex::Autolock _l(mInvalidateLock);
1766    mInvalidateRegion = reg;
1767}
1768
1769Region SurfaceFlinger::getAndClearInvalidateRegion() {
1770    Mutex::Autolock _l(mInvalidateLock);
1771    Region reg(mInvalidateRegion);
1772    mInvalidateRegion.clear();
1773    return reg;
1774}
1775
1776// ---------------------------------------------------------------------------
1777
1778status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1779        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1780{
1781    Mutex::Autolock _l(mStateLock);
1782    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1783}
1784
1785status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1786        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1787{
1788    ATRACE_CALL();
1789
1790    if (!GLExtensions::getInstance().haveFramebufferObject())
1791        return INVALID_OPERATION;
1792
1793    // get screen geometry
1794    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1795    const uint32_t hw_w = hw.getWidth();
1796    const uint32_t hw_h = hw.getHeight();
1797    GLfloat u = 1;
1798    GLfloat v = 1;
1799
1800    // make sure to clear all GL error flags
1801    while ( glGetError() != GL_NO_ERROR ) ;
1802
1803    // create a FBO
1804    GLuint name, tname;
1805    glGenTextures(1, &tname);
1806    glBindTexture(GL_TEXTURE_2D, tname);
1807    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1808    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1809    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1810            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1811    if (glGetError() != GL_NO_ERROR) {
1812        while ( glGetError() != GL_NO_ERROR ) ;
1813        GLint tw = (2 << (31 - clz(hw_w)));
1814        GLint th = (2 << (31 - clz(hw_h)));
1815        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1816                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1817        u = GLfloat(hw_w) / tw;
1818        v = GLfloat(hw_h) / th;
1819    }
1820    glGenFramebuffersOES(1, &name);
1821    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1822    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1823            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1824
1825    // redraw the screen entirely...
1826    glDisable(GL_TEXTURE_EXTERNAL_OES);
1827    glDisable(GL_TEXTURE_2D);
1828    glClearColor(0,0,0,1);
1829    glClear(GL_COLOR_BUFFER_BIT);
1830    glMatrixMode(GL_MODELVIEW);
1831    glLoadIdentity();
1832    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1833    const size_t count = layers.size();
1834    for (size_t i=0 ; i<count ; ++i) {
1835        const sp<LayerBase>& layer(layers[i]);
1836        layer->drawForSreenShot();
1837    }
1838
1839    hw.compositionComplete();
1840
1841    // back to main framebuffer
1842    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1843    glDeleteFramebuffersOES(1, &name);
1844
1845    *textureName = tname;
1846    *uOut = u;
1847    *vOut = v;
1848    return NO_ERROR;
1849}
1850
1851// ---------------------------------------------------------------------------
1852
1853class VSyncWaiter {
1854    DisplayEventReceiver::Event buffer[4];
1855    sp<Looper> looper;
1856    sp<IDisplayEventConnection> events;
1857    sp<BitTube> eventTube;
1858public:
1859    VSyncWaiter(const sp<EventThread>& eventThread) {
1860        looper = new Looper(true);
1861        events = eventThread->createEventConnection();
1862        eventTube = events->getDataChannel();
1863        looper->addFd(eventTube->getFd(), 0, ALOOPER_EVENT_INPUT, 0, 0);
1864        events->requestNextVsync();
1865    }
1866
1867    void wait() {
1868        ssize_t n;
1869
1870        looper->pollOnce(-1);
1871        // we don't handle any errors here, it doesn't matter
1872        // and we don't want to take the risk to get stuck.
1873
1874        // drain the events...
1875        while ((n = DisplayEventReceiver::getEvents(
1876                eventTube, buffer, 4)) > 0) ;
1877
1878        events->requestNextVsync();
1879    }
1880};
1881
1882status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1883{
1884    // get screen geometry
1885    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1886    const uint32_t hw_w = hw.getWidth();
1887    const uint32_t hw_h = hw.getHeight();
1888    const Region screenBounds(hw.getBounds());
1889
1890    GLfloat u, v;
1891    GLuint tname;
1892    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1893    if (result != NO_ERROR) {
1894        return result;
1895    }
1896
1897    GLfloat vtx[8];
1898    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1899    glBindTexture(GL_TEXTURE_2D, tname);
1900    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1901    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1902    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1903    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1904    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1905    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1906    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1907    glVertexPointer(2, GL_FLOAT, 0, vtx);
1908
1909    /*
1910     * Texture coordinate mapping
1911     *
1912     *                 u
1913     *    1 +----------+---+
1914     *      |     |    |   |  image is inverted
1915     *      |     V    |   |  w.r.t. the texture
1916     *  1-v +----------+   |  coordinates
1917     *      |              |
1918     *      |              |
1919     *      |              |
1920     *    0 +--------------+
1921     *      0              1
1922     *
1923     */
1924
1925    class s_curve_interpolator {
1926        const float nbFrames, s, v;
1927    public:
1928        s_curve_interpolator(int nbFrames, float s)
1929        : nbFrames(1.0f / (nbFrames-1)), s(s),
1930          v(1.0f + expf(-s + 0.5f*s)) {
1931        }
1932        float operator()(int f) {
1933            const float x = f * nbFrames;
1934            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1935        }
1936    };
1937
1938    class v_stretch {
1939        const GLfloat hw_w, hw_h;
1940    public:
1941        v_stretch(uint32_t hw_w, uint32_t hw_h)
1942        : hw_w(hw_w), hw_h(hw_h) {
1943        }
1944        void operator()(GLfloat* vtx, float v) {
1945            const GLfloat w = hw_w + (hw_w * v);
1946            const GLfloat h = hw_h - (hw_h * v);
1947            const GLfloat x = (hw_w - w) * 0.5f;
1948            const GLfloat y = (hw_h - h) * 0.5f;
1949            vtx[0] = x;         vtx[1] = y;
1950            vtx[2] = x;         vtx[3] = y + h;
1951            vtx[4] = x + w;     vtx[5] = y + h;
1952            vtx[6] = x + w;     vtx[7] = y;
1953        }
1954    };
1955
1956    class h_stretch {
1957        const GLfloat hw_w, hw_h;
1958    public:
1959        h_stretch(uint32_t hw_w, uint32_t hw_h)
1960        : hw_w(hw_w), hw_h(hw_h) {
1961        }
1962        void operator()(GLfloat* vtx, float v) {
1963            const GLfloat w = hw_w - (hw_w * v);
1964            const GLfloat h = 1.0f;
1965            const GLfloat x = (hw_w - w) * 0.5f;
1966            const GLfloat y = (hw_h - h) * 0.5f;
1967            vtx[0] = x;         vtx[1] = y;
1968            vtx[2] = x;         vtx[3] = y + h;
1969            vtx[4] = x + w;     vtx[5] = y + h;
1970            vtx[6] = x + w;     vtx[7] = y;
1971        }
1972    };
1973
1974    VSyncWaiter vsync(mEventThread);
1975
1976    // the full animation is 24 frames
1977    char value[PROPERTY_VALUE_MAX];
1978    property_get("debug.sf.electron_frames", value, "24");
1979    int nbFrames = (atoi(value) + 1) >> 1;
1980    if (nbFrames <= 0) // just in case
1981        nbFrames = 24;
1982
1983    s_curve_interpolator itr(nbFrames, 7.5f);
1984    s_curve_interpolator itg(nbFrames, 8.0f);
1985    s_curve_interpolator itb(nbFrames, 8.5f);
1986
1987    v_stretch vverts(hw_w, hw_h);
1988
1989    glMatrixMode(GL_TEXTURE);
1990    glLoadIdentity();
1991    glMatrixMode(GL_MODELVIEW);
1992    glLoadIdentity();
1993
1994    glEnable(GL_BLEND);
1995    glBlendFunc(GL_ONE, GL_ONE);
1996    for (int i=0 ; i<nbFrames ; i++) {
1997        float x, y, w, h;
1998        const float vr = itr(i);
1999        const float vg = itg(i);
2000        const float vb = itb(i);
2001
2002        // wait for vsync
2003        vsync.wait();
2004
2005        // clear screen
2006        glColorMask(1,1,1,1);
2007        glClear(GL_COLOR_BUFFER_BIT);
2008        glEnable(GL_TEXTURE_2D);
2009
2010        // draw the red plane
2011        vverts(vtx, vr);
2012        glColorMask(1,0,0,1);
2013        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2014
2015        // draw the green plane
2016        vverts(vtx, vg);
2017        glColorMask(0,1,0,1);
2018        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2019
2020        // draw the blue plane
2021        vverts(vtx, vb);
2022        glColorMask(0,0,1,1);
2023        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2024
2025        // draw the white highlight (we use the last vertices)
2026        glDisable(GL_TEXTURE_2D);
2027        glColorMask(1,1,1,1);
2028        glColor4f(vg, vg, vg, 1);
2029        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2030        hw.flip(screenBounds);
2031    }
2032
2033    h_stretch hverts(hw_w, hw_h);
2034    glDisable(GL_BLEND);
2035    glDisable(GL_TEXTURE_2D);
2036    glColorMask(1,1,1,1);
2037    for (int i=0 ; i<nbFrames ; i++) {
2038        const float v = itg(i);
2039        hverts(vtx, v);
2040
2041        // wait for vsync
2042        vsync.wait();
2043
2044        glClear(GL_COLOR_BUFFER_BIT);
2045        glColor4f(1-v, 1-v, 1-v, 1);
2046        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2047        hw.flip(screenBounds);
2048    }
2049
2050    glColorMask(1,1,1,1);
2051    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2052    glDeleteTextures(1, &tname);
2053    glDisable(GL_TEXTURE_2D);
2054    glDisable(GL_BLEND);
2055    return NO_ERROR;
2056}
2057
2058status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2059{
2060    status_t result = PERMISSION_DENIED;
2061
2062    if (!GLExtensions::getInstance().haveFramebufferObject())
2063        return INVALID_OPERATION;
2064
2065
2066    // get screen geometry
2067    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2068    const uint32_t hw_w = hw.getWidth();
2069    const uint32_t hw_h = hw.getHeight();
2070    const Region screenBounds(hw.bounds());
2071
2072    GLfloat u, v;
2073    GLuint tname;
2074    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2075    if (result != NO_ERROR) {
2076        return result;
2077    }
2078
2079    GLfloat vtx[8];
2080    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2081    glBindTexture(GL_TEXTURE_2D, tname);
2082    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2083    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2084    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2085    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2086    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2087    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2088    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2089    glVertexPointer(2, GL_FLOAT, 0, vtx);
2090
2091    class s_curve_interpolator {
2092        const float nbFrames, s, v;
2093    public:
2094        s_curve_interpolator(int nbFrames, float s)
2095        : nbFrames(1.0f / (nbFrames-1)), s(s),
2096          v(1.0f + expf(-s + 0.5f*s)) {
2097        }
2098        float operator()(int f) {
2099            const float x = f * nbFrames;
2100            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2101        }
2102    };
2103
2104    class v_stretch {
2105        const GLfloat hw_w, hw_h;
2106    public:
2107        v_stretch(uint32_t hw_w, uint32_t hw_h)
2108        : hw_w(hw_w), hw_h(hw_h) {
2109        }
2110        void operator()(GLfloat* vtx, float v) {
2111            const GLfloat w = hw_w + (hw_w * v);
2112            const GLfloat h = hw_h - (hw_h * v);
2113            const GLfloat x = (hw_w - w) * 0.5f;
2114            const GLfloat y = (hw_h - h) * 0.5f;
2115            vtx[0] = x;         vtx[1] = y;
2116            vtx[2] = x;         vtx[3] = y + h;
2117            vtx[4] = x + w;     vtx[5] = y + h;
2118            vtx[6] = x + w;     vtx[7] = y;
2119        }
2120    };
2121
2122    class h_stretch {
2123        const GLfloat hw_w, hw_h;
2124    public:
2125        h_stretch(uint32_t hw_w, uint32_t hw_h)
2126        : hw_w(hw_w), hw_h(hw_h) {
2127        }
2128        void operator()(GLfloat* vtx, float v) {
2129            const GLfloat w = hw_w - (hw_w * v);
2130            const GLfloat h = 1.0f;
2131            const GLfloat x = (hw_w - w) * 0.5f;
2132            const GLfloat y = (hw_h - h) * 0.5f;
2133            vtx[0] = x;         vtx[1] = y;
2134            vtx[2] = x;         vtx[3] = y + h;
2135            vtx[4] = x + w;     vtx[5] = y + h;
2136            vtx[6] = x + w;     vtx[7] = y;
2137        }
2138    };
2139
2140    VSyncWaiter vsync(mEventThread);
2141
2142    // the full animation is 12 frames
2143    int nbFrames = 8;
2144    s_curve_interpolator itr(nbFrames, 7.5f);
2145    s_curve_interpolator itg(nbFrames, 8.0f);
2146    s_curve_interpolator itb(nbFrames, 8.5f);
2147
2148    h_stretch hverts(hw_w, hw_h);
2149    glDisable(GL_BLEND);
2150    glDisable(GL_TEXTURE_2D);
2151    glColorMask(1,1,1,1);
2152    for (int i=nbFrames-1 ; i>=0 ; i--) {
2153        const float v = itg(i);
2154        hverts(vtx, v);
2155
2156        // wait for vsync
2157        vsync.wait();
2158
2159        glClear(GL_COLOR_BUFFER_BIT);
2160        glColor4f(1-v, 1-v, 1-v, 1);
2161        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2162        hw.flip(screenBounds);
2163    }
2164
2165    nbFrames = 4;
2166    v_stretch vverts(hw_w, hw_h);
2167    glEnable(GL_BLEND);
2168    glBlendFunc(GL_ONE, GL_ONE);
2169    for (int i=nbFrames-1 ; i>=0 ; i--) {
2170        float x, y, w, h;
2171        const float vr = itr(i);
2172        const float vg = itg(i);
2173        const float vb = itb(i);
2174
2175        // wait for vsync
2176        vsync.wait();
2177
2178        // clear screen
2179        glColorMask(1,1,1,1);
2180        glClear(GL_COLOR_BUFFER_BIT);
2181        glEnable(GL_TEXTURE_2D);
2182
2183        // draw the red plane
2184        vverts(vtx, vr);
2185        glColorMask(1,0,0,1);
2186        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2187
2188        // draw the green plane
2189        vverts(vtx, vg);
2190        glColorMask(0,1,0,1);
2191        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2192
2193        // draw the blue plane
2194        vverts(vtx, vb);
2195        glColorMask(0,0,1,1);
2196        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2197
2198        hw.flip(screenBounds);
2199    }
2200
2201    glColorMask(1,1,1,1);
2202    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2203    glDeleteTextures(1, &tname);
2204    glDisable(GL_TEXTURE_2D);
2205    glDisable(GL_BLEND);
2206
2207    return NO_ERROR;
2208}
2209
2210// ---------------------------------------------------------------------------
2211
2212status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2213{
2214    ATRACE_CALL();
2215
2216    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2217    if (!hw.canDraw()) {
2218        // we're already off
2219        return NO_ERROR;
2220    }
2221
2222    // turn off hwc while we're doing the animation
2223    hw.getHwComposer().disable();
2224    // and make sure to turn it back on (if needed) next time we compose
2225    invalidateHwcGeometry();
2226
2227    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2228        electronBeamOffAnimationImplLocked();
2229    }
2230
2231    // always clear the whole screen at the end of the animation
2232    glClearColor(0,0,0,1);
2233    glClear(GL_COLOR_BUFFER_BIT);
2234    hw.flip( Region(hw.bounds()) );
2235
2236    return NO_ERROR;
2237}
2238
2239status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2240{
2241    class MessageTurnElectronBeamOff : public MessageBase {
2242        SurfaceFlinger* flinger;
2243        int32_t mode;
2244        status_t result;
2245    public:
2246        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2247            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2248        }
2249        status_t getResult() const {
2250            return result;
2251        }
2252        virtual bool handler() {
2253            Mutex::Autolock _l(flinger->mStateLock);
2254            result = flinger->turnElectronBeamOffImplLocked(mode);
2255            return true;
2256        }
2257    };
2258
2259    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2260    status_t res = postMessageSync(msg);
2261    if (res == NO_ERROR) {
2262        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2263
2264        // work-around: when the power-manager calls us we activate the
2265        // animation. eventually, the "on" animation will be called
2266        // by the power-manager itself
2267        mElectronBeamAnimationMode = mode;
2268    }
2269    return res;
2270}
2271
2272// ---------------------------------------------------------------------------
2273
2274status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2275{
2276    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2277    if (hw.canDraw()) {
2278        // we're already on
2279        return NO_ERROR;
2280    }
2281    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2282        electronBeamOnAnimationImplLocked();
2283    }
2284
2285    // make sure to redraw the whole screen when the animation is done
2286    mDirtyRegion.set(hw.bounds());
2287    signalTransaction();
2288
2289    return NO_ERROR;
2290}
2291
2292status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2293{
2294    class MessageTurnElectronBeamOn : public MessageBase {
2295        SurfaceFlinger* flinger;
2296        int32_t mode;
2297        status_t result;
2298    public:
2299        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2300            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2301        }
2302        status_t getResult() const {
2303            return result;
2304        }
2305        virtual bool handler() {
2306            Mutex::Autolock _l(flinger->mStateLock);
2307            result = flinger->turnElectronBeamOnImplLocked(mode);
2308            return true;
2309        }
2310    };
2311
2312    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2313    return NO_ERROR;
2314}
2315
2316// ---------------------------------------------------------------------------
2317
2318status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2319        sp<IMemoryHeap>* heap,
2320        uint32_t* w, uint32_t* h, PixelFormat* f,
2321        uint32_t sw, uint32_t sh,
2322        uint32_t minLayerZ, uint32_t maxLayerZ)
2323{
2324    ATRACE_CALL();
2325
2326    status_t result = PERMISSION_DENIED;
2327
2328    // only one display supported for now
2329    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2330        return BAD_VALUE;
2331
2332    if (!GLExtensions::getInstance().haveFramebufferObject())
2333        return INVALID_OPERATION;
2334
2335    // get screen geometry
2336    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2337    const uint32_t hw_w = hw.getWidth();
2338    const uint32_t hw_h = hw.getHeight();
2339
2340    if ((sw > hw_w) || (sh > hw_h))
2341        return BAD_VALUE;
2342
2343    sw = (!sw) ? hw_w : sw;
2344    sh = (!sh) ? hw_h : sh;
2345    const size_t size = sw * sh * 4;
2346
2347    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2348    //        sw, sh, minLayerZ, maxLayerZ);
2349
2350    // make sure to clear all GL error flags
2351    while ( glGetError() != GL_NO_ERROR ) ;
2352
2353    // create a FBO
2354    GLuint name, tname;
2355    glGenRenderbuffersOES(1, &tname);
2356    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2357    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2358
2359    glGenFramebuffersOES(1, &name);
2360    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2361    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2362            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2363
2364    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2365
2366    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2367
2368        // invert everything, b/c glReadPixel() below will invert the FB
2369        glViewport(0, 0, sw, sh);
2370        glMatrixMode(GL_PROJECTION);
2371        glPushMatrix();
2372        glLoadIdentity();
2373        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2374        glMatrixMode(GL_MODELVIEW);
2375
2376        // redraw the screen entirely...
2377        glClearColor(0,0,0,1);
2378        glClear(GL_COLOR_BUFFER_BIT);
2379
2380        const LayerVector& layers(mDrawingState.layersSortedByZ);
2381        const size_t count = layers.size();
2382        for (size_t i=0 ; i<count ; ++i) {
2383            const sp<LayerBase>& layer(layers[i]);
2384            const uint32_t flags = layer->drawingState().flags;
2385            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2386                const uint32_t z = layer->drawingState().z;
2387                if (z >= minLayerZ && z <= maxLayerZ) {
2388                    layer->drawForSreenShot();
2389                }
2390            }
2391        }
2392
2393        // check for errors and return screen capture
2394        if (glGetError() != GL_NO_ERROR) {
2395            // error while rendering
2396            result = INVALID_OPERATION;
2397        } else {
2398            // allocate shared memory large enough to hold the
2399            // screen capture
2400            sp<MemoryHeapBase> base(
2401                    new MemoryHeapBase(size, 0, "screen-capture") );
2402            void* const ptr = base->getBase();
2403            if (ptr) {
2404                // capture the screen with glReadPixels()
2405                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2406                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2407                if (glGetError() == GL_NO_ERROR) {
2408                    *heap = base;
2409                    *w = sw;
2410                    *h = sh;
2411                    *f = PIXEL_FORMAT_RGBA_8888;
2412                    result = NO_ERROR;
2413                }
2414            } else {
2415                result = NO_MEMORY;
2416            }
2417        }
2418        glViewport(0, 0, hw_w, hw_h);
2419        glMatrixMode(GL_PROJECTION);
2420        glPopMatrix();
2421        glMatrixMode(GL_MODELVIEW);
2422    } else {
2423        result = BAD_VALUE;
2424    }
2425
2426    // release FBO resources
2427    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2428    glDeleteRenderbuffersOES(1, &tname);
2429    glDeleteFramebuffersOES(1, &name);
2430
2431    hw.compositionComplete();
2432
2433    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2434
2435    return result;
2436}
2437
2438
2439status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2440        sp<IMemoryHeap>* heap,
2441        uint32_t* width, uint32_t* height, PixelFormat* format,
2442        uint32_t sw, uint32_t sh,
2443        uint32_t minLayerZ, uint32_t maxLayerZ)
2444{
2445    // only one display supported for now
2446    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2447        return BAD_VALUE;
2448
2449    if (!GLExtensions::getInstance().haveFramebufferObject())
2450        return INVALID_OPERATION;
2451
2452    class MessageCaptureScreen : public MessageBase {
2453        SurfaceFlinger* flinger;
2454        DisplayID dpy;
2455        sp<IMemoryHeap>* heap;
2456        uint32_t* w;
2457        uint32_t* h;
2458        PixelFormat* f;
2459        uint32_t sw;
2460        uint32_t sh;
2461        uint32_t minLayerZ;
2462        uint32_t maxLayerZ;
2463        status_t result;
2464    public:
2465        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2466                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2467                uint32_t sw, uint32_t sh,
2468                uint32_t minLayerZ, uint32_t maxLayerZ)
2469            : flinger(flinger), dpy(dpy),
2470              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2471              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2472              result(PERMISSION_DENIED)
2473        {
2474        }
2475        status_t getResult() const {
2476            return result;
2477        }
2478        virtual bool handler() {
2479            Mutex::Autolock _l(flinger->mStateLock);
2480
2481            // if we have secure windows, never allow the screen capture
2482            if (flinger->mSecureFrameBuffer)
2483                return true;
2484
2485            result = flinger->captureScreenImplLocked(dpy,
2486                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2487
2488            return true;
2489        }
2490    };
2491
2492    sp<MessageBase> msg = new MessageCaptureScreen(this,
2493            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2494    status_t res = postMessageSync(msg);
2495    if (res == NO_ERROR) {
2496        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2497    }
2498    return res;
2499}
2500
2501// ---------------------------------------------------------------------------
2502
2503sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2504{
2505    sp<Layer> result;
2506    Mutex::Autolock _l(mStateLock);
2507    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2508    return result;
2509}
2510
2511// ---------------------------------------------------------------------------
2512
2513GraphicBufferAlloc::GraphicBufferAlloc() {}
2514
2515GraphicBufferAlloc::~GraphicBufferAlloc() {}
2516
2517sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2518        PixelFormat format, uint32_t usage, status_t* error) {
2519    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2520    status_t err = graphicBuffer->initCheck();
2521    *error = err;
2522    if (err != 0 || graphicBuffer->handle == 0) {
2523        if (err == NO_MEMORY) {
2524            GraphicBuffer::dumpAllocationsToSystemLog();
2525        }
2526        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2527             "failed (%s), handle=%p",
2528                w, h, strerror(-err), graphicBuffer->handle);
2529        return 0;
2530    }
2531    return graphicBuffer;
2532}
2533
2534// ---------------------------------------------------------------------------
2535
2536GraphicPlane::GraphicPlane()
2537    : mHw(0)
2538{
2539}
2540
2541GraphicPlane::~GraphicPlane() {
2542    delete mHw;
2543}
2544
2545bool GraphicPlane::initialized() const {
2546    return mHw ? true : false;
2547}
2548
2549int GraphicPlane::getWidth() const {
2550    return mWidth;
2551}
2552
2553int GraphicPlane::getHeight() const {
2554    return mHeight;
2555}
2556
2557void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2558{
2559    mHw = hw;
2560
2561    // initialize the display orientation transform.
2562    // it's a constant that should come from the display driver.
2563    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2564    char property[PROPERTY_VALUE_MAX];
2565    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2566        //displayOrientation
2567        switch (atoi(property)) {
2568        case 90:
2569            displayOrientation = ISurfaceComposer::eOrientation90;
2570            break;
2571        case 270:
2572            displayOrientation = ISurfaceComposer::eOrientation270;
2573            break;
2574        }
2575    }
2576
2577    const float w = hw->getWidth();
2578    const float h = hw->getHeight();
2579    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2580            &mDisplayTransform);
2581    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2582        mDisplayWidth = h;
2583        mDisplayHeight = w;
2584    } else {
2585        mDisplayWidth = w;
2586        mDisplayHeight = h;
2587    }
2588
2589    setOrientation(ISurfaceComposer::eOrientationDefault);
2590}
2591
2592status_t GraphicPlane::orientationToTransfrom(
2593        int orientation, int w, int h, Transform* tr)
2594{
2595    uint32_t flags = 0;
2596    switch (orientation) {
2597    case ISurfaceComposer::eOrientationDefault:
2598        flags = Transform::ROT_0;
2599        break;
2600    case ISurfaceComposer::eOrientation90:
2601        flags = Transform::ROT_90;
2602        break;
2603    case ISurfaceComposer::eOrientation180:
2604        flags = Transform::ROT_180;
2605        break;
2606    case ISurfaceComposer::eOrientation270:
2607        flags = Transform::ROT_270;
2608        break;
2609    default:
2610        return BAD_VALUE;
2611    }
2612    tr->set(flags, w, h);
2613    return NO_ERROR;
2614}
2615
2616status_t GraphicPlane::setOrientation(int orientation)
2617{
2618    // If the rotation can be handled in hardware, this is where
2619    // the magic should happen.
2620
2621    const DisplayHardware& hw(displayHardware());
2622    const float w = mDisplayWidth;
2623    const float h = mDisplayHeight;
2624    mWidth = int(w);
2625    mHeight = int(h);
2626
2627    Transform orientationTransform;
2628    GraphicPlane::orientationToTransfrom(orientation, w, h,
2629            &orientationTransform);
2630    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2631        mWidth = int(h);
2632        mHeight = int(w);
2633    }
2634
2635    mOrientation = orientation;
2636    mGlobalTransform = mDisplayTransform * orientationTransform;
2637    return NO_ERROR;
2638}
2639
2640const DisplayHardware& GraphicPlane::displayHardware() const {
2641    return *mHw;
2642}
2643
2644DisplayHardware& GraphicPlane::editDisplayHardware() {
2645    return *mHw;
2646}
2647
2648const Transform& GraphicPlane::transform() const {
2649    return mGlobalTransform;
2650}
2651
2652EGLDisplay GraphicPlane::getEGLDisplay() const {
2653    return mHw->getEGLDisplay();
2654}
2655
2656// ---------------------------------------------------------------------------
2657
2658}; // namespace android
2659