SurfaceFlinger.cpp revision 3e8b853d67c737abdb363f9c978e7d83eac4d888 
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 "EventThread.h"
54#include "GLExtensions.h"
55#include "Layer.h"
56#include "LayerDim.h"
57#include "LayerScreenshot.h"
58#include "SurfaceFlinger.h"
59
60#include "DisplayHardware/DisplayHardware.h"
61#include "DisplayHardware/HWComposer.h"
62
63#include <private/android_filesystem_config.h>
64#include <private/gui/SharedBufferStack.h>
65#include <gui/BitTube.h>
66
67#define EGL_VERSION_HW_ANDROID  0x3143
68
69#define DISPLAY_COUNT       1
70
71namespace android {
72// ---------------------------------------------------------------------------
73
74const String16 sHardwareTest("android.permission.HARDWARE_TEST");
75const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
76const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
77const String16 sDump("android.permission.DUMP");
78
79// ---------------------------------------------------------------------------
80
81SurfaceFlinger::SurfaceFlinger()
82    :   BnSurfaceComposer(), Thread(false),
83        mTransactionFlags(0),
84        mTransationPending(false),
85        mLayersRemoved(false),
86        mBootTime(systemTime()),
87        mVisibleRegionsDirty(false),
88        mHwWorkListDirty(false),
89        mElectronBeamAnimationMode(0),
90        mDebugRegion(0),
91        mDebugDDMS(0),
92        mDebugDisableHWC(0),
93        mDebugDisableTransformHint(0),
94        mDebugInSwapBuffers(0),
95        mLastSwapBufferTime(0),
96        mDebugInTransaction(0),
97        mLastTransactionTime(0),
98        mBootFinished(false),
99        mSecureFrameBuffer(0)
100{
101    init();
102}
103
104void SurfaceFlinger::init()
105{
106    ALOGI("SurfaceFlinger is starting");
107
108    // debugging stuff...
109    char value[PROPERTY_VALUE_MAX];
110
111    property_get("debug.sf.showupdates", value, "0");
112    mDebugRegion = atoi(value);
113
114#ifdef DDMS_DEBUGGING
115    property_get("debug.sf.ddms", value, "0");
116    mDebugDDMS = atoi(value);
117    if (mDebugDDMS) {
118        DdmConnection::start(getServiceName());
119    }
120#endif
121
122    ALOGI_IF(mDebugRegion,       "showupdates enabled");
123    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
124}
125
126void SurfaceFlinger::onFirstRef()
127{
128    mEventQueue.init(this);
129
130    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
131
132    // Wait for the main thread to be done with its initialization
133    mReadyToRunBarrier.wait();
134}
135
136
137SurfaceFlinger::~SurfaceFlinger()
138{
139    glDeleteTextures(1, &mWormholeTexName);
140}
141
142void SurfaceFlinger::binderDied(const wp<IBinder>& who)
143{
144    // the window manager died on us. prepare its eulogy.
145
146    // reset screen orientation
147    Vector<ComposerState> state;
148    setTransactionState(state, eOrientationDefault, 0);
149
150    // restart the boot-animation
151    property_set("ctl.start", "bootanim");
152}
153
154sp<IMemoryHeap> SurfaceFlinger::getCblk() const
155{
156    return mServerHeap;
157}
158
159sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
160{
161    sp<ISurfaceComposerClient> bclient;
162    sp<Client> client(new Client(this));
163    status_t err = client->initCheck();
164    if (err == NO_ERROR) {
165        bclient = client;
166    }
167    return bclient;
168}
169
170sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
171{
172    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
173    return gba;
174}
175
176const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
177{
178    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
179    const GraphicPlane& plane(mGraphicPlanes[dpy]);
180    return plane;
181}
182
183GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
184{
185    return const_cast<GraphicPlane&>(
186        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
187}
188
189void SurfaceFlinger::bootFinished()
190{
191    const nsecs_t now = systemTime();
192    const nsecs_t duration = now - mBootTime;
193    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
194    mBootFinished = true;
195
196    // wait patiently for the window manager death
197    const String16 name("window");
198    sp<IBinder> window(defaultServiceManager()->getService(name));
199    if (window != 0) {
200        window->linkToDeath(this);
201    }
202
203    // stop boot animation
204    property_set("ctl.stop", "bootanim");
205}
206
207static inline uint16_t pack565(int r, int g, int b) {
208    return (r<<11)|(g<<5)|b;
209}
210
211status_t SurfaceFlinger::readyToRun()
212{
213    ALOGI(   "SurfaceFlinger's main thread ready to run. "
214            "Initializing graphics H/W...");
215
216    // we only support one display currently
217    int dpy = 0;
218
219    {
220        // initialize the main display
221        GraphicPlane& plane(graphicPlane(dpy));
222        DisplayHardware* const hw = new DisplayHardware(this, dpy);
223        plane.setDisplayHardware(hw);
224    }
225
226    // create the shared control-block
227    mServerHeap = new MemoryHeapBase(4096,
228            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
229    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
230
231    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
232    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
233
234    new(mServerCblk) surface_flinger_cblk_t;
235
236    // initialize primary screen
237    // (other display should be initialized in the same manner, but
238    // asynchronously, as they could come and go. None of this is supported
239    // yet).
240    const GraphicPlane& plane(graphicPlane(dpy));
241    const DisplayHardware& hw = plane.displayHardware();
242    const uint32_t w = hw.getWidth();
243    const uint32_t h = hw.getHeight();
244    const uint32_t f = hw.getFormat();
245    hw.makeCurrent();
246
247    // initialize the shared control block
248    mServerCblk->connected |= 1<<dpy;
249    display_cblk_t* dcblk = mServerCblk->displays + dpy;
250    memset(dcblk, 0, sizeof(display_cblk_t));
251    dcblk->w            = plane.getWidth();
252    dcblk->h            = plane.getHeight();
253    dcblk->format       = f;
254    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
255    dcblk->xdpi         = hw.getDpiX();
256    dcblk->ydpi         = hw.getDpiY();
257    dcblk->fps          = hw.getRefreshRate();
258    dcblk->density      = hw.getDensity();
259
260    // Initialize OpenGL|ES
261    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
262    glPixelStorei(GL_PACK_ALIGNMENT, 4);
263    glEnableClientState(GL_VERTEX_ARRAY);
264    glShadeModel(GL_FLAT);
265    glDisable(GL_DITHER);
266    glDisable(GL_CULL_FACE);
267
268    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
269    const uint16_t g1 = pack565(0x17,0x2f,0x17);
270    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
271    glGenTextures(1, &mWormholeTexName);
272    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
273    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
274    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
275    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
276    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
277    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
278            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
279
280    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
281    glGenTextures(1, &mProtectedTexName);
282    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
284    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
285    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
286    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
287    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
288            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
289
290    glViewport(0, 0, w, h);
291    glMatrixMode(GL_PROJECTION);
292    glLoadIdentity();
293    // put the origin in the left-bottom corner
294    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
295
296
297    // start the EventThread
298    mEventThread = new EventThread(this);
299    mEventQueue.setEventThread(mEventThread);
300
301    /*
302     *  We're now ready to accept clients...
303     */
304
305    mReadyToRunBarrier.open();
306
307    // start boot animation
308    property_set("ctl.start", "bootanim");
309
310    return NO_ERROR;
311}
312
313// ----------------------------------------------------------------------------
314
315bool SurfaceFlinger::authenticateSurfaceTexture(
316        const sp<ISurfaceTexture>& surfaceTexture) const {
317    Mutex::Autolock _l(mStateLock);
318    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
319
320    // Check the visible layer list for the ISurface
321    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
322    size_t count = currentLayers.size();
323    for (size_t i=0 ; i<count ; i++) {
324        const sp<LayerBase>& layer(currentLayers[i]);
325        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
326        if (lbc != NULL) {
327            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
328            if (lbcBinder == surfaceTextureBinder) {
329                return true;
330            }
331        }
332    }
333
334    // Check the layers in the purgatory.  This check is here so that if a
335    // SurfaceTexture gets destroyed before all the clients are done using it,
336    // the error will not be reported as "surface XYZ is not authenticated", but
337    // will instead fail later on when the client tries to use the surface,
338    // which should be reported as "surface XYZ returned an -ENODEV".  The
339    // purgatorized layers are no less authentic than the visible ones, so this
340    // should not cause any harm.
341    size_t purgatorySize =  mLayerPurgatory.size();
342    for (size_t i=0 ; i<purgatorySize ; i++) {
343        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
344        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
345        if (lbc != NULL) {
346            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
347            if (lbcBinder == surfaceTextureBinder) {
348                return true;
349            }
350        }
351    }
352
353    return false;
354}
355
356// ----------------------------------------------------------------------------
357
358sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
359    return mEventThread->createEventConnection();
360}
361
362// ----------------------------------------------------------------------------
363
364void SurfaceFlinger::waitForEvent() {
365    mEventQueue.waitMessage();
366}
367
368void SurfaceFlinger::signalTransaction() {
369    mEventQueue.invalidate();
370}
371
372void SurfaceFlinger::signalLayerUpdate() {
373    mEventQueue.invalidate();
374}
375
376void SurfaceFlinger::signalRefresh() {
377    mEventQueue.refresh();
378}
379
380status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
381        nsecs_t reltime, uint32_t flags) {
382    return mEventQueue.postMessage(msg, reltime);
383}
384
385status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
386        nsecs_t reltime, uint32_t flags) {
387    status_t res = mEventQueue.postMessage(msg, reltime);
388    if (res == NO_ERROR) {
389        msg->wait();
390    }
391    return res;
392}
393
394bool SurfaceFlinger::threadLoop()
395{
396    waitForEvent();
397    return true;
398}
399
400void SurfaceFlinger::onMessageReceived(int32_t what)
401{
402    ATRACE_CALL();
403    switch (what) {
404        case MessageQueue::REFRESH: {
405//        case MessageQueue::INVALIDATE: {
406            // if we're in a global transaction, don't do anything.
407            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
408            uint32_t transactionFlags = peekTransactionFlags(mask);
409            if (CC_UNLIKELY(transactionFlags)) {
410                handleTransaction(transactionFlags);
411            }
412
413            // post surfaces (if needed)
414            handlePageFlip();
415
416//            signalRefresh();
417//
418//        } break;
419//
420//        case MessageQueue::REFRESH: {
421
422            handleRefresh();
423
424            const DisplayHardware& hw(graphicPlane(0).displayHardware());
425
426//            if (mDirtyRegion.isEmpty()) {
427//                return;
428//            }
429
430            if (CC_UNLIKELY(mHwWorkListDirty)) {
431                // build the h/w work list
432                handleWorkList();
433            }
434
435            if (CC_LIKELY(hw.canDraw())) {
436                // repaint the framebuffer (if needed)
437                handleRepaint();
438                // inform the h/w that we're done compositing
439                hw.compositionComplete();
440                postFramebuffer();
441            } else {
442                // pretend we did the post
443                hw.compositionComplete();
444            }
445
446        } break;
447    }
448}
449
450void SurfaceFlinger::postFramebuffer()
451{
452    ATRACE_CALL();
453    // mSwapRegion can be empty here is some cases, for instance if a hidden
454    // or fully transparent window is updating.
455    // in that case, we need to flip anyways to not risk a deadlock with
456    // h/w composer.
457
458    const DisplayHardware& hw(graphicPlane(0).displayHardware());
459    const nsecs_t now = systemTime();
460    mDebugInSwapBuffers = now;
461    hw.flip(mSwapRegion);
462
463    size_t numLayers = mVisibleLayersSortedByZ.size();
464    for (size_t i = 0; i < numLayers; i++) {
465        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
466    }
467
468    mLastSwapBufferTime = systemTime() - now;
469    mDebugInSwapBuffers = 0;
470    mSwapRegion.clear();
471}
472
473void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
474{
475    ATRACE_CALL();
476
477    Mutex::Autolock _l(mStateLock);
478    const nsecs_t now = systemTime();
479    mDebugInTransaction = now;
480
481    // Here we're guaranteed that some transaction flags are set
482    // so we can call handleTransactionLocked() unconditionally.
483    // We call getTransactionFlags(), which will also clear the flags,
484    // with mStateLock held to guarantee that mCurrentState won't change
485    // until the transaction is committed.
486
487    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
488    transactionFlags = getTransactionFlags(mask);
489    handleTransactionLocked(transactionFlags);
490
491    mLastTransactionTime = systemTime() - now;
492    mDebugInTransaction = 0;
493    invalidateHwcGeometry();
494    // here the transaction has been committed
495}
496
497void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
498{
499    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
500    const size_t count = currentLayers.size();
501
502    /*
503     * Traversal of the children
504     * (perform the transaction for each of them if needed)
505     */
506
507    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
508    if (layersNeedTransaction) {
509        for (size_t i=0 ; i<count ; i++) {
510            const sp<LayerBase>& layer = currentLayers[i];
511            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
512            if (!trFlags) continue;
513
514            const uint32_t flags = layer->doTransaction(0);
515            if (flags & Layer::eVisibleRegion)
516                mVisibleRegionsDirty = true;
517        }
518    }
519
520    /*
521     * Perform our own transaction if needed
522     */
523
524    if (transactionFlags & eTransactionNeeded) {
525        if (mCurrentState.orientation != mDrawingState.orientation) {
526            // the orientation has changed, recompute all visible regions
527            // and invalidate everything.
528
529            const int dpy = 0;
530            const int orientation = mCurrentState.orientation;
531            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
532            GraphicPlane& plane(graphicPlane(dpy));
533            plane.setOrientation(orientation);
534
535            // update the shared control block
536            const DisplayHardware& hw(plane.displayHardware());
537            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
538            dcblk->orientation = orientation;
539            dcblk->w = plane.getWidth();
540            dcblk->h = plane.getHeight();
541
542            mVisibleRegionsDirty = true;
543            mDirtyRegion.set(hw.bounds());
544        }
545
546        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
547            // layers have been added
548            mVisibleRegionsDirty = true;
549        }
550
551        // some layers might have been removed, so
552        // we need to update the regions they're exposing.
553        if (mLayersRemoved) {
554            mLayersRemoved = false;
555            mVisibleRegionsDirty = true;
556            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
557            const size_t count = previousLayers.size();
558            for (size_t i=0 ; i<count ; i++) {
559                const sp<LayerBase>& layer(previousLayers[i]);
560                if (currentLayers.indexOf( layer ) < 0) {
561                    // this layer is not visible anymore
562                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
563                }
564            }
565        }
566    }
567
568    commitTransaction();
569}
570
571void SurfaceFlinger::computeVisibleRegions(
572    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
573{
574    ATRACE_CALL();
575
576    const GraphicPlane& plane(graphicPlane(0));
577    const Transform& planeTransform(plane.transform());
578    const DisplayHardware& hw(plane.displayHardware());
579    const Region screenRegion(hw.bounds());
580
581    Region aboveOpaqueLayers;
582    Region aboveCoveredLayers;
583    Region dirty;
584
585    bool secureFrameBuffer = false;
586
587    size_t i = currentLayers.size();
588    while (i--) {
589        const sp<LayerBase>& layer = currentLayers[i];
590        layer->validateVisibility(planeTransform);
591
592        // start with the whole surface at its current location
593        const Layer::State& s(layer->drawingState());
594
595        /*
596         * opaqueRegion: area of a surface that is fully opaque.
597         */
598        Region opaqueRegion;
599
600        /*
601         * visibleRegion: area of a surface that is visible on screen
602         * and not fully transparent. This is essentially the layer's
603         * footprint minus the opaque regions above it.
604         * Areas covered by a translucent surface are considered visible.
605         */
606        Region visibleRegion;
607
608        /*
609         * coveredRegion: area of a surface that is covered by all
610         * visible regions above it (which includes the translucent areas).
611         */
612        Region coveredRegion;
613
614
615        // handle hidden surfaces by setting the visible region to empty
616        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
617            const bool translucent = !layer->isOpaque();
618            const Rect bounds(layer->visibleBounds());
619            visibleRegion.set(bounds);
620            visibleRegion.andSelf(screenRegion);
621            if (!visibleRegion.isEmpty()) {
622                // Remove the transparent area from the visible region
623                if (translucent) {
624                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
625                }
626
627                // compute the opaque region
628                const int32_t layerOrientation = layer->getOrientation();
629                if (s.alpha==255 && !translucent &&
630                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
631                    // the opaque region is the layer's footprint
632                    opaqueRegion = visibleRegion;
633                }
634            }
635        }
636
637        // Clip the covered region to the visible region
638        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
639
640        // Update aboveCoveredLayers for next (lower) layer
641        aboveCoveredLayers.orSelf(visibleRegion);
642
643        // subtract the opaque region covered by the layers above us
644        visibleRegion.subtractSelf(aboveOpaqueLayers);
645
646        // compute this layer's dirty region
647        if (layer->contentDirty) {
648            // we need to invalidate the whole region
649            dirty = visibleRegion;
650            // as well, as the old visible region
651            dirty.orSelf(layer->visibleRegionScreen);
652            layer->contentDirty = false;
653        } else {
654            /* compute the exposed region:
655             *   the exposed region consists of two components:
656             *   1) what's VISIBLE now and was COVERED before
657             *   2) what's EXPOSED now less what was EXPOSED before
658             *
659             * note that (1) is conservative, we start with the whole
660             * visible region but only keep what used to be covered by
661             * something -- which mean it may have been exposed.
662             *
663             * (2) handles areas that were not covered by anything but got
664             * exposed because of a resize.
665             */
666            const Region newExposed = visibleRegion - coveredRegion;
667            const Region oldVisibleRegion = layer->visibleRegionScreen;
668            const Region oldCoveredRegion = layer->coveredRegionScreen;
669            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
670            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
671        }
672        dirty.subtractSelf(aboveOpaqueLayers);
673
674        // accumulate to the screen dirty region
675        dirtyRegion.orSelf(dirty);
676
677        // Update aboveOpaqueLayers for next (lower) layer
678        aboveOpaqueLayers.orSelf(opaqueRegion);
679
680        // Store the visible region is screen space
681        layer->setVisibleRegion(visibleRegion);
682        layer->setCoveredRegion(coveredRegion);
683
684        // If a secure layer is partially visible, lock-down the screen!
685        if (layer->isSecure() && !visibleRegion.isEmpty()) {
686            secureFrameBuffer = true;
687        }
688    }
689
690    // invalidate the areas where a layer was removed
691    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
692    mDirtyRegionRemovedLayer.clear();
693
694    mSecureFrameBuffer = secureFrameBuffer;
695    opaqueRegion = aboveOpaqueLayers;
696}
697
698
699void SurfaceFlinger::commitTransaction()
700{
701    if (!mLayersPendingRemoval.isEmpty()) {
702        // Notify removed layers now that they can't be drawn from
703        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
704            mLayersPendingRemoval[i]->onRemoved();
705        }
706        mLayersPendingRemoval.clear();
707    }
708
709    mDrawingState = mCurrentState;
710    mTransationPending = false;
711    mTransactionCV.broadcast();
712}
713
714void SurfaceFlinger::handlePageFlip()
715{
716    ATRACE_CALL();
717    const DisplayHardware& hw = graphicPlane(0).displayHardware();
718    const Region screenRegion(hw.bounds());
719
720    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
721    const bool visibleRegions = lockPageFlip(currentLayers);
722
723        if (visibleRegions || mVisibleRegionsDirty) {
724            Region opaqueRegion;
725            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
726
727            /*
728             *  rebuild the visible layer list
729             */
730            const size_t count = currentLayers.size();
731            mVisibleLayersSortedByZ.clear();
732            mVisibleLayersSortedByZ.setCapacity(count);
733            for (size_t i=0 ; i<count ; i++) {
734                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
735                    mVisibleLayersSortedByZ.add(currentLayers[i]);
736            }
737
738            mWormholeRegion = screenRegion.subtract(opaqueRegion);
739            mVisibleRegionsDirty = false;
740            invalidateHwcGeometry();
741        }
742
743    unlockPageFlip(currentLayers);
744
745    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
746    mDirtyRegion.andSelf(screenRegion);
747}
748
749void SurfaceFlinger::invalidateHwcGeometry()
750{
751    mHwWorkListDirty = true;
752}
753
754bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
755{
756    bool recomputeVisibleRegions = false;
757    size_t count = currentLayers.size();
758    sp<LayerBase> const* layers = currentLayers.array();
759    for (size_t i=0 ; i<count ; i++) {
760        const sp<LayerBase>& layer(layers[i]);
761        layer->lockPageFlip(recomputeVisibleRegions);
762    }
763    return recomputeVisibleRegions;
764}
765
766void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
767{
768    const GraphicPlane& plane(graphicPlane(0));
769    const Transform& planeTransform(plane.transform());
770    const size_t count = currentLayers.size();
771    sp<LayerBase> const* layers = currentLayers.array();
772    for (size_t i=0 ; i<count ; i++) {
773        const sp<LayerBase>& layer(layers[i]);
774        layer->unlockPageFlip(planeTransform, mDirtyRegion);
775    }
776}
777
778void SurfaceFlinger::handleRefresh()
779{
780    bool needInvalidate = false;
781    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
782    const size_t count = currentLayers.size();
783    for (size_t i=0 ; i<count ; i++) {
784        const sp<LayerBase>& layer(currentLayers[i]);
785        if (layer->onPreComposition()) {
786            needInvalidate = true;
787        }
788    }
789    if (needInvalidate) {
790        signalLayerUpdate();
791    }
792}
793
794
795void SurfaceFlinger::handleWorkList()
796{
797    mHwWorkListDirty = false;
798    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
799    if (hwc.initCheck() == NO_ERROR) {
800        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
801        const size_t count = currentLayers.size();
802        hwc.createWorkList(count);
803
804        HWComposer::LayerListIterator cur = hwc.begin();
805        const HWComposer::LayerListIterator end = hwc.end();
806        for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
807            currentLayers[i]->setGeometry(*cur);
808            if (mDebugDisableHWC || mDebugRegion) {
809                cur->setSkip(true);
810            }
811        }
812    }
813}
814
815void SurfaceFlinger::handleRepaint()
816{
817    ATRACE_CALL();
818
819    // compute the invalid region
820    mSwapRegion.orSelf(mDirtyRegion);
821
822    if (CC_UNLIKELY(mDebugRegion)) {
823        debugFlashRegions();
824    }
825
826    // set the frame buffer
827    const DisplayHardware& hw(graphicPlane(0).displayHardware());
828    glMatrixMode(GL_MODELVIEW);
829    glLoadIdentity();
830
831    uint32_t flags = hw.getFlags();
832    if (flags & DisplayHardware::SWAP_RECTANGLE) {
833        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
834        // takes a rectangle, we must make sure to update that whole
835        // rectangle in that case
836        mDirtyRegion.set(mSwapRegion.bounds());
837    } else {
838        if (flags & DisplayHardware::PARTIAL_UPDATES) {
839            // We need to redraw the rectangle that will be updated
840            // (pushed to the framebuffer).
841            // This is needed because PARTIAL_UPDATES only takes one
842            // rectangle instead of a region (see DisplayHardware::flip())
843            mDirtyRegion.set(mSwapRegion.bounds());
844        } else {
845            // we need to redraw everything (the whole screen)
846            mDirtyRegion.set(hw.bounds());
847            mSwapRegion = mDirtyRegion;
848        }
849    }
850
851    setupHardwareComposer();
852    composeSurfaces(mDirtyRegion);
853
854    // update the swap region and clear the dirty region
855    mSwapRegion.orSelf(mDirtyRegion);
856    mDirtyRegion.clear();
857}
858
859void SurfaceFlinger::setupHardwareComposer()
860{
861    const DisplayHardware& hw(graphicPlane(0).displayHardware());
862    HWComposer& hwc(hw.getHwComposer());
863
864    HWComposer::LayerListIterator cur = hwc.begin();
865    const HWComposer::LayerListIterator end = hwc.end();
866    if (cur == end) {
867        return;
868    }
869
870    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
871    size_t count = layers.size();
872
873    ALOGE_IF(hwc.getNumLayers() != count,
874            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
875            hwc.getNumLayers(), count);
876
877    // just to be extra-safe, use the smallest count
878    if (hwc.initCheck() == NO_ERROR) {
879        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
880    }
881
882    /*
883     *  update the per-frame h/w composer data for each layer
884     *  and build the transparent region of the FB
885     */
886    for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
887        const sp<LayerBase>& layer(layers[i]);
888        layer->setPerFrameData(*cur);
889    }
890    status_t err = hwc.prepare();
891    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
892}
893
894void SurfaceFlinger::composeSurfaces(const Region& dirty)
895{
896    const DisplayHardware& hw(graphicPlane(0).displayHardware());
897    HWComposer& hwc(hw.getHwComposer());
898    HWComposer::LayerListIterator cur = hwc.begin();
899    const HWComposer::LayerListIterator end = hwc.end();
900
901    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
902    if (cur==end || fbLayerCount) {
903        // Never touch the framebuffer if we don't have any framebuffer layers
904
905        if (hwc.getLayerCount(HWC_OVERLAY)) {
906            // when using overlays, we assume a fully transparent framebuffer
907            // NOTE: we could reduce how much we need to clear, for instance
908            // remove where there are opaque FB layers. however, on some
909            // GPUs doing a "clean slate" glClear might be more efficient.
910            // We'll revisit later if needed.
911            glClearColor(0, 0, 0, 0);
912            glClear(GL_COLOR_BUFFER_BIT);
913        } else {
914            // screen is already cleared here
915            if (!mWormholeRegion.isEmpty()) {
916                // can happen with SurfaceView
917                drawWormhole();
918            }
919        }
920
921        /*
922         * and then, render the layers targeted at the framebuffer
923         */
924
925        const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
926        const size_t count = layers.size();
927        for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
928            const sp<LayerBase>& layer(layers[i]);
929            const Region clip(dirty.intersect(layer->visibleRegionScreen));
930            if (!clip.isEmpty()) {
931                if (cur->getCompositionType() == HWC_OVERLAY) {
932                    if (i && (cur->getHints() & HWC_HINT_CLEAR_FB)
933                            && layer->isOpaque()) {
934                        // never clear the very first layer since we're
935                        // guaranteed the FB is already cleared
936                        layer->clearWithOpenGL(clip);
937                    }
938                    continue;
939                }
940                // render the layer
941                layer->draw(clip);
942            }
943        }
944    }
945}
946
947void SurfaceFlinger::debugFlashRegions()
948{
949    const DisplayHardware& hw(graphicPlane(0).displayHardware());
950    const uint32_t flags = hw.getFlags();
951    const int32_t height = hw.getHeight();
952    if (mSwapRegion.isEmpty()) {
953        return;
954    }
955
956    if (!(flags & DisplayHardware::SWAP_RECTANGLE)) {
957        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
958                mDirtyRegion.bounds() : hw.bounds());
959        composeSurfaces(repaint);
960    }
961
962    glDisable(GL_TEXTURE_EXTERNAL_OES);
963    glDisable(GL_TEXTURE_2D);
964    glDisable(GL_BLEND);
965
966    static int toggle = 0;
967    toggle = 1 - toggle;
968    if (toggle) {
969        glColor4f(1, 0, 1, 1);
970    } else {
971        glColor4f(1, 1, 0, 1);
972    }
973
974    Region::const_iterator it = mDirtyRegion.begin();
975    Region::const_iterator const end = mDirtyRegion.end();
976    while (it != end) {
977        const Rect& r = *it++;
978        GLfloat vertices[][2] = {
979                { r.left,  height - r.top },
980                { r.left,  height - r.bottom },
981                { r.right, height - r.bottom },
982                { r.right, height - r.top }
983        };
984        glVertexPointer(2, GL_FLOAT, 0, vertices);
985        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
986    }
987
988    hw.flip(mSwapRegion);
989
990    if (mDebugRegion > 1)
991        usleep(mDebugRegion * 1000);
992}
993
994void SurfaceFlinger::drawWormhole() const
995{
996    const Region region(mWormholeRegion.intersect(mDirtyRegion));
997    if (region.isEmpty())
998        return;
999
1000    glDisable(GL_TEXTURE_EXTERNAL_OES);
1001    glDisable(GL_TEXTURE_2D);
1002    glDisable(GL_BLEND);
1003    glColor4f(0,0,0,0);
1004
1005    GLfloat vertices[4][2];
1006    glVertexPointer(2, GL_FLOAT, 0, vertices);
1007    Region::const_iterator it = region.begin();
1008    Region::const_iterator const end = region.end();
1009    while (it != end) {
1010        const Rect& r = *it++;
1011        vertices[0][0] = r.left;
1012        vertices[0][1] = r.top;
1013        vertices[1][0] = r.right;
1014        vertices[1][1] = r.top;
1015        vertices[2][0] = r.right;
1016        vertices[2][1] = r.bottom;
1017        vertices[3][0] = r.left;
1018        vertices[3][1] = r.bottom;
1019        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1020    }
1021}
1022
1023status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1024{
1025    Mutex::Autolock _l(mStateLock);
1026    addLayer_l(layer);
1027    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1028    return NO_ERROR;
1029}
1030
1031status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1032{
1033    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1034    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1035}
1036
1037ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1038        const sp<LayerBaseClient>& lbc)
1039{
1040    // attach this layer to the client
1041    size_t name = client->attachLayer(lbc);
1042
1043    Mutex::Autolock _l(mStateLock);
1044
1045    // add this layer to the current state list
1046    addLayer_l(lbc);
1047
1048    return ssize_t(name);
1049}
1050
1051status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1052{
1053    Mutex::Autolock _l(mStateLock);
1054    status_t err = purgatorizeLayer_l(layer);
1055    if (err == NO_ERROR)
1056        setTransactionFlags(eTransactionNeeded);
1057    return err;
1058}
1059
1060status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1061{
1062    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1063    if (lbc != 0) {
1064        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1065    }
1066    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1067    if (index >= 0) {
1068        mLayersRemoved = true;
1069        return NO_ERROR;
1070    }
1071    return status_t(index);
1072}
1073
1074status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1075{
1076    // First add the layer to the purgatory list, which makes sure it won't
1077    // go away, then remove it from the main list (through a transaction).
1078    ssize_t err = removeLayer_l(layerBase);
1079    if (err >= 0) {
1080        mLayerPurgatory.add(layerBase);
1081    }
1082
1083    mLayersPendingRemoval.push(layerBase);
1084
1085    // it's possible that we don't find a layer, because it might
1086    // have been destroyed already -- this is not technically an error
1087    // from the user because there is a race between Client::destroySurface(),
1088    // ~Client() and ~ISurface().
1089    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1090}
1091
1092status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1093{
1094    layer->forceVisibilityTransaction();
1095    setTransactionFlags(eTraversalNeeded);
1096    return NO_ERROR;
1097}
1098
1099uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1100{
1101    return android_atomic_release_load(&mTransactionFlags);
1102}
1103
1104uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1105{
1106    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1107}
1108
1109uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1110{
1111    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1112    if ((old & flags)==0) { // wake the server up
1113        signalTransaction();
1114    }
1115    return old;
1116}
1117
1118
1119void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1120        int orientation, uint32_t flags) {
1121    Mutex::Autolock _l(mStateLock);
1122
1123    uint32_t transactionFlags = 0;
1124    if (mCurrentState.orientation != orientation) {
1125        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1126            mCurrentState.orientation = orientation;
1127            transactionFlags |= eTransactionNeeded;
1128        } else if (orientation != eOrientationUnchanged) {
1129            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1130                    orientation);
1131        }
1132    }
1133
1134    const size_t count = state.size();
1135    for (size_t i=0 ; i<count ; i++) {
1136        const ComposerState& s(state[i]);
1137        sp<Client> client( static_cast<Client *>(s.client.get()) );
1138        transactionFlags |= setClientStateLocked(client, s.state);
1139    }
1140
1141    if (transactionFlags) {
1142        // this triggers the transaction
1143        setTransactionFlags(transactionFlags);
1144
1145        // if this is a synchronous transaction, wait for it to take effect
1146        // before returning.
1147        if (flags & eSynchronous) {
1148            mTransationPending = true;
1149        }
1150        while (mTransationPending) {
1151            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1152            if (CC_UNLIKELY(err != NO_ERROR)) {
1153                // just in case something goes wrong in SF, return to the
1154                // called after a few seconds.
1155                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1156                mTransationPending = false;
1157                break;
1158            }
1159        }
1160    }
1161}
1162
1163sp<ISurface> SurfaceFlinger::createSurface(
1164        ISurfaceComposerClient::surface_data_t* params,
1165        const String8& name,
1166        const sp<Client>& client,
1167        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1168        uint32_t flags)
1169{
1170    sp<LayerBaseClient> layer;
1171    sp<ISurface> surfaceHandle;
1172
1173    if (int32_t(w|h) < 0) {
1174        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1175                int(w), int(h));
1176        return surfaceHandle;
1177    }
1178
1179    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1180    sp<Layer> normalLayer;
1181    switch (flags & eFXSurfaceMask) {
1182        case eFXSurfaceNormal:
1183            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1184            layer = normalLayer;
1185            break;
1186        case eFXSurfaceBlur:
1187            // for now we treat Blur as Dim, until we can implement it
1188            // efficiently.
1189        case eFXSurfaceDim:
1190            layer = createDimSurface(client, d, w, h, flags);
1191            break;
1192        case eFXSurfaceScreenshot:
1193            layer = createScreenshotSurface(client, d, w, h, flags);
1194            break;
1195    }
1196
1197    if (layer != 0) {
1198        layer->initStates(w, h, flags);
1199        layer->setName(name);
1200        ssize_t token = addClientLayer(client, layer);
1201
1202        surfaceHandle = layer->getSurface();
1203        if (surfaceHandle != 0) {
1204            params->token = token;
1205            params->identity = layer->getIdentity();
1206            if (normalLayer != 0) {
1207                Mutex::Autolock _l(mStateLock);
1208                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1209            }
1210        }
1211
1212        setTransactionFlags(eTransactionNeeded);
1213    }
1214
1215    return surfaceHandle;
1216}
1217
1218sp<Layer> SurfaceFlinger::createNormalSurface(
1219        const sp<Client>& client, DisplayID display,
1220        uint32_t w, uint32_t h, uint32_t flags,
1221        PixelFormat& format)
1222{
1223    // initialize the surfaces
1224    switch (format) { // TODO: take h/w into account
1225    case PIXEL_FORMAT_TRANSPARENT:
1226    case PIXEL_FORMAT_TRANSLUCENT:
1227        format = PIXEL_FORMAT_RGBA_8888;
1228        break;
1229    case PIXEL_FORMAT_OPAQUE:
1230#ifdef NO_RGBX_8888
1231        format = PIXEL_FORMAT_RGB_565;
1232#else
1233        format = PIXEL_FORMAT_RGBX_8888;
1234#endif
1235        break;
1236    }
1237
1238#ifdef NO_RGBX_8888
1239    if (format == PIXEL_FORMAT_RGBX_8888)
1240        format = PIXEL_FORMAT_RGBA_8888;
1241#endif
1242
1243    sp<Layer> layer = new Layer(this, display, client);
1244    status_t err = layer->setBuffers(w, h, format, flags);
1245    if (CC_LIKELY(err != NO_ERROR)) {
1246        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1247        layer.clear();
1248    }
1249    return layer;
1250}
1251
1252sp<LayerDim> SurfaceFlinger::createDimSurface(
1253        const sp<Client>& client, DisplayID display,
1254        uint32_t w, uint32_t h, uint32_t flags)
1255{
1256    sp<LayerDim> layer = new LayerDim(this, display, client);
1257    return layer;
1258}
1259
1260sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1261        const sp<Client>& client, DisplayID display,
1262        uint32_t w, uint32_t h, uint32_t flags)
1263{
1264    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1265    return layer;
1266}
1267
1268status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1269{
1270    /*
1271     * called by the window manager, when a surface should be marked for
1272     * destruction.
1273     *
1274     * The surface is removed from the current and drawing lists, but placed
1275     * in the purgatory queue, so it's not destroyed right-away (we need
1276     * to wait for all client's references to go away first).
1277     */
1278
1279    status_t err = NAME_NOT_FOUND;
1280    Mutex::Autolock _l(mStateLock);
1281    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1282
1283    if (layer != 0) {
1284        err = purgatorizeLayer_l(layer);
1285        if (err == NO_ERROR) {
1286            setTransactionFlags(eTransactionNeeded);
1287        }
1288    }
1289    return err;
1290}
1291
1292status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1293{
1294    // called by ~ISurface() when all references are gone
1295    status_t err = NO_ERROR;
1296    sp<LayerBaseClient> l(layer.promote());
1297    if (l != NULL) {
1298        Mutex::Autolock _l(mStateLock);
1299        err = removeLayer_l(l);
1300        if (err == NAME_NOT_FOUND) {
1301            // The surface wasn't in the current list, which means it was
1302            // removed already, which means it is in the purgatory,
1303            // and need to be removed from there.
1304            ssize_t idx = mLayerPurgatory.remove(l);
1305            ALOGE_IF(idx < 0,
1306                    "layer=%p is not in the purgatory list", l.get());
1307        }
1308        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1309                "error removing layer=%p (%s)", l.get(), strerror(-err));
1310    }
1311    return err;
1312}
1313
1314uint32_t SurfaceFlinger::setClientStateLocked(
1315        const sp<Client>& client,
1316        const layer_state_t& s)
1317{
1318    uint32_t flags = 0;
1319    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1320    if (layer != 0) {
1321        const uint32_t what = s.what;
1322        if (what & ePositionChanged) {
1323            if (layer->setPosition(s.x, s.y))
1324                flags |= eTraversalNeeded;
1325        }
1326        if (what & eLayerChanged) {
1327            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1328            if (layer->setLayer(s.z)) {
1329                mCurrentState.layersSortedByZ.removeAt(idx);
1330                mCurrentState.layersSortedByZ.add(layer);
1331                // we need traversal (state changed)
1332                // AND transaction (list changed)
1333                flags |= eTransactionNeeded|eTraversalNeeded;
1334            }
1335        }
1336        if (what & eSizeChanged) {
1337            if (layer->setSize(s.w, s.h)) {
1338                flags |= eTraversalNeeded;
1339            }
1340        }
1341        if (what & eAlphaChanged) {
1342            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1343                flags |= eTraversalNeeded;
1344        }
1345        if (what & eMatrixChanged) {
1346            if (layer->setMatrix(s.matrix))
1347                flags |= eTraversalNeeded;
1348        }
1349        if (what & eTransparentRegionChanged) {
1350            if (layer->setTransparentRegionHint(s.transparentRegion))
1351                flags |= eTraversalNeeded;
1352        }
1353        if (what & eVisibilityChanged) {
1354            if (layer->setFlags(s.flags, s.mask))
1355                flags |= eTraversalNeeded;
1356        }
1357        if (what & eCropChanged) {
1358            if (layer->setCrop(s.crop))
1359                flags |= eTraversalNeeded;
1360        }
1361    }
1362    return flags;
1363}
1364
1365// ---------------------------------------------------------------------------
1366
1367void SurfaceFlinger::onScreenAcquired() {
1368    ALOGD("Screen about to return, flinger = %p", this);
1369    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1370    hw.acquireScreen();
1371    mEventThread->onScreenAcquired();
1372    // this is a temporary work-around, eventually this should be called
1373    // by the power-manager
1374    SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
1375    // from this point on, SF will process updates again
1376    repaintEverything();
1377}
1378
1379void SurfaceFlinger::onScreenReleased() {
1380    ALOGD("About to give-up screen, flinger = %p", this);
1381    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1382    if (hw.isScreenAcquired()) {
1383        mEventThread->onScreenReleased();
1384        hw.releaseScreen();
1385        // from this point on, SF will stop drawing
1386    }
1387}
1388
1389void SurfaceFlinger::unblank() {
1390    class MessageScreenAcquired : public MessageBase {
1391        SurfaceFlinger* flinger;
1392    public:
1393        MessageScreenAcquired(SurfaceFlinger* flinger) : flinger(flinger) { }
1394        virtual bool handler() {
1395            flinger->onScreenAcquired();
1396            return true;
1397        }
1398    };
1399    sp<MessageBase> msg = new MessageScreenAcquired(this);
1400    postMessageSync(msg);
1401}
1402
1403void SurfaceFlinger::blank() {
1404    class MessageScreenReleased : public MessageBase {
1405        SurfaceFlinger* flinger;
1406    public:
1407        MessageScreenReleased(SurfaceFlinger* flinger) : flinger(flinger) { }
1408        virtual bool handler() {
1409            flinger->onScreenReleased();
1410            return true;
1411        }
1412    };
1413    sp<MessageBase> msg = new MessageScreenReleased(this);
1414    postMessageSync(msg);
1415}
1416
1417// ---------------------------------------------------------------------------
1418
1419status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1420{
1421    const size_t SIZE = 4096;
1422    char buffer[SIZE];
1423    String8 result;
1424
1425    if (!PermissionCache::checkCallingPermission(sDump)) {
1426        snprintf(buffer, SIZE, "Permission Denial: "
1427                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1428                IPCThreadState::self()->getCallingPid(),
1429                IPCThreadState::self()->getCallingUid());
1430        result.append(buffer);
1431    } else {
1432        // Try to get the main lock, but don't insist if we can't
1433        // (this would indicate SF is stuck, but we want to be able to
1434        // print something in dumpsys).
1435        int retry = 3;
1436        while (mStateLock.tryLock()<0 && --retry>=0) {
1437            usleep(1000000);
1438        }
1439        const bool locked(retry >= 0);
1440        if (!locked) {
1441            snprintf(buffer, SIZE,
1442                    "SurfaceFlinger appears to be unresponsive, "
1443                    "dumping anyways (no locks held)\n");
1444            result.append(buffer);
1445        }
1446
1447        bool dumpAll = true;
1448        size_t index = 0;
1449        size_t numArgs = args.size();
1450        if (numArgs) {
1451            if ((index < numArgs) &&
1452                    (args[index] == String16("--list"))) {
1453                index++;
1454                listLayersLocked(args, index, result, buffer, SIZE);
1455                dumpAll = false;
1456            }
1457
1458            if ((index < numArgs) &&
1459                    (args[index] == String16("--latency"))) {
1460                index++;
1461                dumpStatsLocked(args, index, result, buffer, SIZE);
1462                dumpAll = false;
1463            }
1464
1465            if ((index < numArgs) &&
1466                    (args[index] == String16("--latency-clear"))) {
1467                index++;
1468                clearStatsLocked(args, index, result, buffer, SIZE);
1469                dumpAll = false;
1470            }
1471        }
1472
1473        if (dumpAll) {
1474            dumpAllLocked(result, buffer, SIZE);
1475        }
1476
1477        if (locked) {
1478            mStateLock.unlock();
1479        }
1480    }
1481    write(fd, result.string(), result.size());
1482    return NO_ERROR;
1483}
1484
1485void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1486        String8& result, char* buffer, size_t SIZE) const
1487{
1488    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1489    const size_t count = currentLayers.size();
1490    for (size_t i=0 ; i<count ; i++) {
1491        const sp<LayerBase>& layer(currentLayers[i]);
1492        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1493        result.append(buffer);
1494    }
1495}
1496
1497void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1498        String8& result, char* buffer, size_t SIZE) const
1499{
1500    String8 name;
1501    if (index < args.size()) {
1502        name = String8(args[index]);
1503        index++;
1504    }
1505
1506    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1507    const size_t count = currentLayers.size();
1508    for (size_t i=0 ; i<count ; i++) {
1509        const sp<LayerBase>& layer(currentLayers[i]);
1510        if (name.isEmpty()) {
1511            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1512            result.append(buffer);
1513        }
1514        if (name.isEmpty() || (name == layer->getName())) {
1515            layer->dumpStats(result, buffer, SIZE);
1516        }
1517    }
1518}
1519
1520void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1521        String8& result, char* buffer, size_t SIZE) const
1522{
1523    String8 name;
1524    if (index < args.size()) {
1525        name = String8(args[index]);
1526        index++;
1527    }
1528
1529    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1530    const size_t count = currentLayers.size();
1531    for (size_t i=0 ; i<count ; i++) {
1532        const sp<LayerBase>& layer(currentLayers[i]);
1533        if (name.isEmpty() || (name == layer->getName())) {
1534            layer->clearStats();
1535        }
1536    }
1537}
1538
1539void SurfaceFlinger::dumpAllLocked(
1540        String8& result, char* buffer, size_t SIZE) const
1541{
1542    // figure out if we're stuck somewhere
1543    const nsecs_t now = systemTime();
1544    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1545    const nsecs_t inTransaction(mDebugInTransaction);
1546    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1547    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1548
1549    /*
1550     * Dump the visible layer list
1551     */
1552    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1553    const size_t count = currentLayers.size();
1554    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1555    result.append(buffer);
1556    for (size_t i=0 ; i<count ; i++) {
1557        const sp<LayerBase>& layer(currentLayers[i]);
1558        layer->dump(result, buffer, SIZE);
1559    }
1560
1561    /*
1562     * Dump the layers in the purgatory
1563     */
1564
1565    const size_t purgatorySize = mLayerPurgatory.size();
1566    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1567    result.append(buffer);
1568    for (size_t i=0 ; i<purgatorySize ; i++) {
1569        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1570        layer->shortDump(result, buffer, SIZE);
1571    }
1572
1573    /*
1574     * Dump SurfaceFlinger global state
1575     */
1576
1577    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1578    result.append(buffer);
1579
1580    const GLExtensions& extensions(GLExtensions::getInstance());
1581    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1582            extensions.getVendor(),
1583            extensions.getRenderer(),
1584            extensions.getVersion());
1585    result.append(buffer);
1586
1587    snprintf(buffer, SIZE, "EGL : %s\n",
1588            eglQueryString(graphicPlane(0).getEGLDisplay(),
1589                    EGL_VERSION_HW_ANDROID));
1590    result.append(buffer);
1591
1592    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1593    result.append(buffer);
1594
1595    mWormholeRegion.dump(result, "WormholeRegion");
1596    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1597    snprintf(buffer, SIZE,
1598            "  orientation=%d, canDraw=%d\n",
1599            mCurrentState.orientation, hw.canDraw());
1600    result.append(buffer);
1601    snprintf(buffer, SIZE,
1602            "  last eglSwapBuffers() time: %f us\n"
1603            "  last transaction time     : %f us\n"
1604            "  transaction-flags         : %08x\n"
1605            "  refresh-rate              : %f fps\n"
1606            "  x-dpi                     : %f\n"
1607            "  y-dpi                     : %f\n"
1608            "  density                   : %f\n",
1609            mLastSwapBufferTime/1000.0,
1610            mLastTransactionTime/1000.0,
1611            mTransactionFlags,
1612            hw.getRefreshRate(),
1613            hw.getDpiX(),
1614            hw.getDpiY(),
1615            hw.getDensity());
1616    result.append(buffer);
1617
1618    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1619            inSwapBuffersDuration/1000.0);
1620    result.append(buffer);
1621
1622    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1623            inTransactionDuration/1000.0);
1624    result.append(buffer);
1625
1626    /*
1627     * VSYNC state
1628     */
1629    mEventThread->dump(result, buffer, SIZE);
1630
1631    /*
1632     * Dump HWComposer state
1633     */
1634    HWComposer& hwc(hw.getHwComposer());
1635    snprintf(buffer, SIZE, "h/w composer state:\n");
1636    result.append(buffer);
1637    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1638            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1639                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1640    result.append(buffer);
1641    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1642
1643    /*
1644     * Dump gralloc state
1645     */
1646    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1647    alloc.dump(result);
1648    hw.dump(result);
1649}
1650
1651status_t SurfaceFlinger::onTransact(
1652    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1653{
1654    switch (code) {
1655        case CREATE_CONNECTION:
1656        case SET_TRANSACTION_STATE:
1657        case SET_ORIENTATION:
1658        case BOOT_FINISHED:
1659        case TURN_ELECTRON_BEAM_OFF:
1660        case TURN_ELECTRON_BEAM_ON:
1661        case BLANK:
1662        case UNBLANK:
1663        {
1664            // codes that require permission check
1665            IPCThreadState* ipc = IPCThreadState::self();
1666            const int pid = ipc->getCallingPid();
1667            const int uid = ipc->getCallingUid();
1668            if ((uid != AID_GRAPHICS) &&
1669                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1670                ALOGE("Permission Denial: "
1671                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1672                return PERMISSION_DENIED;
1673            }
1674            break;
1675        }
1676        case CAPTURE_SCREEN:
1677        {
1678            // codes that require permission check
1679            IPCThreadState* ipc = IPCThreadState::self();
1680            const int pid = ipc->getCallingPid();
1681            const int uid = ipc->getCallingUid();
1682            if ((uid != AID_GRAPHICS) &&
1683                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1684                ALOGE("Permission Denial: "
1685                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1686                return PERMISSION_DENIED;
1687            }
1688            break;
1689        }
1690    }
1691
1692    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1693    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1694        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1695        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1696            IPCThreadState* ipc = IPCThreadState::self();
1697            const int pid = ipc->getCallingPid();
1698            const int uid = ipc->getCallingUid();
1699            ALOGE("Permission Denial: "
1700                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1701            return PERMISSION_DENIED;
1702        }
1703        int n;
1704        switch (code) {
1705            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1706            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1707                return NO_ERROR;
1708            case 1002:  // SHOW_UPDATES
1709                n = data.readInt32();
1710                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1711                invalidateHwcGeometry();
1712                repaintEverything();
1713                return NO_ERROR;
1714            case 1004:{ // repaint everything
1715                repaintEverything();
1716                return NO_ERROR;
1717            }
1718            case 1005:{ // force transaction
1719                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1720                return NO_ERROR;
1721            }
1722            case 1006:{ // send empty update
1723                signalRefresh();
1724                return NO_ERROR;
1725            }
1726            case 1008:  // toggle use of hw composer
1727                n = data.readInt32();
1728                mDebugDisableHWC = n ? 1 : 0;
1729                invalidateHwcGeometry();
1730                repaintEverything();
1731                return NO_ERROR;
1732            case 1009:  // toggle use of transform hint
1733                n = data.readInt32();
1734                mDebugDisableTransformHint = n ? 1 : 0;
1735                invalidateHwcGeometry();
1736                repaintEverything();
1737                return NO_ERROR;
1738            case 1010:  // interrogate.
1739                reply->writeInt32(0);
1740                reply->writeInt32(0);
1741                reply->writeInt32(mDebugRegion);
1742                reply->writeInt32(0);
1743                reply->writeInt32(mDebugDisableHWC);
1744                return NO_ERROR;
1745            case 1013: {
1746                Mutex::Autolock _l(mStateLock);
1747                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1748                reply->writeInt32(hw.getPageFlipCount());
1749            }
1750            return NO_ERROR;
1751        }
1752    }
1753    return err;
1754}
1755
1756void SurfaceFlinger::repaintEverything() {
1757    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1758    const Rect bounds(hw.getBounds());
1759    setInvalidateRegion(Region(bounds));
1760    signalTransaction();
1761}
1762
1763void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1764    Mutex::Autolock _l(mInvalidateLock);
1765    mInvalidateRegion = reg;
1766}
1767
1768Region SurfaceFlinger::getAndClearInvalidateRegion() {
1769    Mutex::Autolock _l(mInvalidateLock);
1770    Region reg(mInvalidateRegion);
1771    mInvalidateRegion.clear();
1772    return reg;
1773}
1774
1775// ---------------------------------------------------------------------------
1776
1777status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1778        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1779{
1780    Mutex::Autolock _l(mStateLock);
1781    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1782}
1783
1784status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1785        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1786{
1787    ATRACE_CALL();
1788
1789    if (!GLExtensions::getInstance().haveFramebufferObject())
1790        return INVALID_OPERATION;
1791
1792    // get screen geometry
1793    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1794    const uint32_t hw_w = hw.getWidth();
1795    const uint32_t hw_h = hw.getHeight();
1796    GLfloat u = 1;
1797    GLfloat v = 1;
1798
1799    // make sure to clear all GL error flags
1800    while ( glGetError() != GL_NO_ERROR ) ;
1801
1802    // create a FBO
1803    GLuint name, tname;
1804    glGenTextures(1, &tname);
1805    glBindTexture(GL_TEXTURE_2D, tname);
1806    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1807    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1808    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1809            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1810    if (glGetError() != GL_NO_ERROR) {
1811        while ( glGetError() != GL_NO_ERROR ) ;
1812        GLint tw = (2 << (31 - clz(hw_w)));
1813        GLint th = (2 << (31 - clz(hw_h)));
1814        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1815                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1816        u = GLfloat(hw_w) / tw;
1817        v = GLfloat(hw_h) / th;
1818    }
1819    glGenFramebuffersOES(1, &name);
1820    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1821    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1822            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1823
1824    // redraw the screen entirely...
1825    glDisable(GL_TEXTURE_EXTERNAL_OES);
1826    glDisable(GL_TEXTURE_2D);
1827    glClearColor(0,0,0,1);
1828    glClear(GL_COLOR_BUFFER_BIT);
1829    glMatrixMode(GL_MODELVIEW);
1830    glLoadIdentity();
1831    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1832    const size_t count = layers.size();
1833    for (size_t i=0 ; i<count ; ++i) {
1834        const sp<LayerBase>& layer(layers[i]);
1835        layer->drawForSreenShot();
1836    }
1837
1838    hw.compositionComplete();
1839
1840    // back to main framebuffer
1841    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1842    glDeleteFramebuffersOES(1, &name);
1843
1844    *textureName = tname;
1845    *uOut = u;
1846    *vOut = v;
1847    return NO_ERROR;
1848}
1849
1850// ---------------------------------------------------------------------------
1851
1852class VSyncWaiter {
1853    DisplayEventReceiver::Event buffer[4];
1854    sp<Looper> looper;
1855    sp<IDisplayEventConnection> events;
1856    sp<BitTube> eventTube;
1857public:
1858    VSyncWaiter(const sp<EventThread>& eventThread) {
1859        looper = new Looper(true);
1860        events = eventThread->createEventConnection();
1861        eventTube = events->getDataChannel();
1862        looper->addFd(eventTube->getFd(), 0, ALOOPER_EVENT_INPUT, 0, 0);
1863        events->requestNextVsync();
1864    }
1865
1866    void wait() {
1867        ssize_t n;
1868
1869        looper->pollOnce(-1);
1870        // we don't handle any errors here, it doesn't matter
1871        // and we don't want to take the risk to get stuck.
1872
1873        // drain the events...
1874        while ((n = DisplayEventReceiver::getEvents(
1875                eventTube, buffer, 4)) > 0) ;
1876
1877        events->requestNextVsync();
1878    }
1879};
1880
1881status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1882{
1883    // get screen geometry
1884    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1885    const uint32_t hw_w = hw.getWidth();
1886    const uint32_t hw_h = hw.getHeight();
1887    const Region screenBounds(hw.getBounds());
1888
1889    GLfloat u, v;
1890    GLuint tname;
1891    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1892    if (result != NO_ERROR) {
1893        return result;
1894    }
1895
1896    GLfloat vtx[8];
1897    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1898    glBindTexture(GL_TEXTURE_2D, tname);
1899    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1900    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1901    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1902    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1903    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1904    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1905    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1906    glVertexPointer(2, GL_FLOAT, 0, vtx);
1907
1908    /*
1909     * Texture coordinate mapping
1910     *
1911     *                 u
1912     *    1 +----------+---+
1913     *      |     |    |   |  image is inverted
1914     *      |     V    |   |  w.r.t. the texture
1915     *  1-v +----------+   |  coordinates
1916     *      |              |
1917     *      |              |
1918     *      |              |
1919     *    0 +--------------+
1920     *      0              1
1921     *
1922     */
1923
1924    class s_curve_interpolator {
1925        const float nbFrames, s, v;
1926    public:
1927        s_curve_interpolator(int nbFrames, float s)
1928        : nbFrames(1.0f / (nbFrames-1)), s(s),
1929          v(1.0f + expf(-s + 0.5f*s)) {
1930        }
1931        float operator()(int f) {
1932            const float x = f * nbFrames;
1933            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1934        }
1935    };
1936
1937    class v_stretch {
1938        const GLfloat hw_w, hw_h;
1939    public:
1940        v_stretch(uint32_t hw_w, uint32_t hw_h)
1941        : hw_w(hw_w), hw_h(hw_h) {
1942        }
1943        void operator()(GLfloat* vtx, float v) {
1944            const GLfloat w = hw_w + (hw_w * v);
1945            const GLfloat h = hw_h - (hw_h * v);
1946            const GLfloat x = (hw_w - w) * 0.5f;
1947            const GLfloat y = (hw_h - h) * 0.5f;
1948            vtx[0] = x;         vtx[1] = y;
1949            vtx[2] = x;         vtx[3] = y + h;
1950            vtx[4] = x + w;     vtx[5] = y + h;
1951            vtx[6] = x + w;     vtx[7] = y;
1952        }
1953    };
1954
1955    class h_stretch {
1956        const GLfloat hw_w, hw_h;
1957    public:
1958        h_stretch(uint32_t hw_w, uint32_t hw_h)
1959        : hw_w(hw_w), hw_h(hw_h) {
1960        }
1961        void operator()(GLfloat* vtx, float v) {
1962            const GLfloat w = hw_w - (hw_w * v);
1963            const GLfloat h = 1.0f;
1964            const GLfloat x = (hw_w - w) * 0.5f;
1965            const GLfloat y = (hw_h - h) * 0.5f;
1966            vtx[0] = x;         vtx[1] = y;
1967            vtx[2] = x;         vtx[3] = y + h;
1968            vtx[4] = x + w;     vtx[5] = y + h;
1969            vtx[6] = x + w;     vtx[7] = y;
1970        }
1971    };
1972
1973    VSyncWaiter vsync(mEventThread);
1974
1975    // the full animation is 24 frames
1976    char value[PROPERTY_VALUE_MAX];
1977    property_get("debug.sf.electron_frames", value, "24");
1978    int nbFrames = (atoi(value) + 1) >> 1;
1979    if (nbFrames <= 0) // just in case
1980        nbFrames = 24;
1981
1982    s_curve_interpolator itr(nbFrames, 7.5f);
1983    s_curve_interpolator itg(nbFrames, 8.0f);
1984    s_curve_interpolator itb(nbFrames, 8.5f);
1985
1986    v_stretch vverts(hw_w, hw_h);
1987
1988    glMatrixMode(GL_TEXTURE);
1989    glLoadIdentity();
1990    glMatrixMode(GL_MODELVIEW);
1991    glLoadIdentity();
1992
1993    glEnable(GL_BLEND);
1994    glBlendFunc(GL_ONE, GL_ONE);
1995    for (int i=0 ; i<nbFrames ; i++) {
1996        float x, y, w, h;
1997        const float vr = itr(i);
1998        const float vg = itg(i);
1999        const float vb = itb(i);
2000
2001        // wait for vsync
2002        vsync.wait();
2003
2004        // clear screen
2005        glColorMask(1,1,1,1);
2006        glClear(GL_COLOR_BUFFER_BIT);
2007        glEnable(GL_TEXTURE_2D);
2008
2009        // draw the red plane
2010        vverts(vtx, vr);
2011        glColorMask(1,0,0,1);
2012        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2013
2014        // draw the green plane
2015        vverts(vtx, vg);
2016        glColorMask(0,1,0,1);
2017        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2018
2019        // draw the blue plane
2020        vverts(vtx, vb);
2021        glColorMask(0,0,1,1);
2022        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2023
2024        // draw the white highlight (we use the last vertices)
2025        glDisable(GL_TEXTURE_2D);
2026        glColorMask(1,1,1,1);
2027        glColor4f(vg, vg, vg, 1);
2028        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2029        hw.flip(screenBounds);
2030    }
2031
2032    h_stretch hverts(hw_w, hw_h);
2033    glDisable(GL_BLEND);
2034    glDisable(GL_TEXTURE_2D);
2035    glColorMask(1,1,1,1);
2036    for (int i=0 ; i<nbFrames ; i++) {
2037        const float v = itg(i);
2038        hverts(vtx, v);
2039
2040        // wait for vsync
2041        vsync.wait();
2042
2043        glClear(GL_COLOR_BUFFER_BIT);
2044        glColor4f(1-v, 1-v, 1-v, 1);
2045        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2046        hw.flip(screenBounds);
2047    }
2048
2049    glColorMask(1,1,1,1);
2050    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2051    glDeleteTextures(1, &tname);
2052    glDisable(GL_TEXTURE_2D);
2053    glDisable(GL_BLEND);
2054    return NO_ERROR;
2055}
2056
2057status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2058{
2059    status_t result = PERMISSION_DENIED;
2060
2061    if (!GLExtensions::getInstance().haveFramebufferObject())
2062        return INVALID_OPERATION;
2063
2064
2065    // get screen geometry
2066    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2067    const uint32_t hw_w = hw.getWidth();
2068    const uint32_t hw_h = hw.getHeight();
2069    const Region screenBounds(hw.bounds());
2070
2071    GLfloat u, v;
2072    GLuint tname;
2073    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2074    if (result != NO_ERROR) {
2075        return result;
2076    }
2077
2078    GLfloat vtx[8];
2079    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2080    glBindTexture(GL_TEXTURE_2D, tname);
2081    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2082    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2083    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2084    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2085    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2086    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2087    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2088    glVertexPointer(2, GL_FLOAT, 0, vtx);
2089
2090    class s_curve_interpolator {
2091        const float nbFrames, s, v;
2092    public:
2093        s_curve_interpolator(int nbFrames, float s)
2094        : nbFrames(1.0f / (nbFrames-1)), s(s),
2095          v(1.0f + expf(-s + 0.5f*s)) {
2096        }
2097        float operator()(int f) {
2098            const float x = f * nbFrames;
2099            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2100        }
2101    };
2102
2103    class v_stretch {
2104        const GLfloat hw_w, hw_h;
2105    public:
2106        v_stretch(uint32_t hw_w, uint32_t hw_h)
2107        : hw_w(hw_w), hw_h(hw_h) {
2108        }
2109        void operator()(GLfloat* vtx, float v) {
2110            const GLfloat w = hw_w + (hw_w * v);
2111            const GLfloat h = hw_h - (hw_h * v);
2112            const GLfloat x = (hw_w - w) * 0.5f;
2113            const GLfloat y = (hw_h - h) * 0.5f;
2114            vtx[0] = x;         vtx[1] = y;
2115            vtx[2] = x;         vtx[3] = y + h;
2116            vtx[4] = x + w;     vtx[5] = y + h;
2117            vtx[6] = x + w;     vtx[7] = y;
2118        }
2119    };
2120
2121    class h_stretch {
2122        const GLfloat hw_w, hw_h;
2123    public:
2124        h_stretch(uint32_t hw_w, uint32_t hw_h)
2125        : hw_w(hw_w), hw_h(hw_h) {
2126        }
2127        void operator()(GLfloat* vtx, float v) {
2128            const GLfloat w = hw_w - (hw_w * v);
2129            const GLfloat h = 1.0f;
2130            const GLfloat x = (hw_w - w) * 0.5f;
2131            const GLfloat y = (hw_h - h) * 0.5f;
2132            vtx[0] = x;         vtx[1] = y;
2133            vtx[2] = x;         vtx[3] = y + h;
2134            vtx[4] = x + w;     vtx[5] = y + h;
2135            vtx[6] = x + w;     vtx[7] = y;
2136        }
2137    };
2138
2139    VSyncWaiter vsync(mEventThread);
2140
2141    // the full animation is 12 frames
2142    int nbFrames = 8;
2143    s_curve_interpolator itr(nbFrames, 7.5f);
2144    s_curve_interpolator itg(nbFrames, 8.0f);
2145    s_curve_interpolator itb(nbFrames, 8.5f);
2146
2147    h_stretch hverts(hw_w, hw_h);
2148    glDisable(GL_BLEND);
2149    glDisable(GL_TEXTURE_2D);
2150    glColorMask(1,1,1,1);
2151    for (int i=nbFrames-1 ; i>=0 ; i--) {
2152        const float v = itg(i);
2153        hverts(vtx, v);
2154
2155        // wait for vsync
2156        vsync.wait();
2157
2158        glClear(GL_COLOR_BUFFER_BIT);
2159        glColor4f(1-v, 1-v, 1-v, 1);
2160        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2161        hw.flip(screenBounds);
2162    }
2163
2164    nbFrames = 4;
2165    v_stretch vverts(hw_w, hw_h);
2166    glEnable(GL_BLEND);
2167    glBlendFunc(GL_ONE, GL_ONE);
2168    for (int i=nbFrames-1 ; i>=0 ; i--) {
2169        float x, y, w, h;
2170        const float vr = itr(i);
2171        const float vg = itg(i);
2172        const float vb = itb(i);
2173
2174        // wait for vsync
2175        vsync.wait();
2176
2177        // clear screen
2178        glColorMask(1,1,1,1);
2179        glClear(GL_COLOR_BUFFER_BIT);
2180        glEnable(GL_TEXTURE_2D);
2181
2182        // draw the red plane
2183        vverts(vtx, vr);
2184        glColorMask(1,0,0,1);
2185        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2186
2187        // draw the green plane
2188        vverts(vtx, vg);
2189        glColorMask(0,1,0,1);
2190        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2191
2192        // draw the blue plane
2193        vverts(vtx, vb);
2194        glColorMask(0,0,1,1);
2195        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2196
2197        hw.flip(screenBounds);
2198    }
2199
2200    glColorMask(1,1,1,1);
2201    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2202    glDeleteTextures(1, &tname);
2203    glDisable(GL_TEXTURE_2D);
2204    glDisable(GL_BLEND);
2205
2206    return NO_ERROR;
2207}
2208
2209// ---------------------------------------------------------------------------
2210
2211status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2212{
2213    ATRACE_CALL();
2214
2215    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2216    if (!hw.canDraw()) {
2217        // we're already off
2218        return NO_ERROR;
2219    }
2220
2221    // turn off hwc while we're doing the animation
2222    hw.getHwComposer().disable();
2223    // and make sure to turn it back on (if needed) next time we compose
2224    invalidateHwcGeometry();
2225
2226    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2227        electronBeamOffAnimationImplLocked();
2228    }
2229
2230    // always clear the whole screen at the end of the animation
2231    glClearColor(0,0,0,1);
2232    glClear(GL_COLOR_BUFFER_BIT);
2233    hw.flip( Region(hw.bounds()) );
2234
2235    return NO_ERROR;
2236}
2237
2238status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2239{
2240    class MessageTurnElectronBeamOff : public MessageBase {
2241        SurfaceFlinger* flinger;
2242        int32_t mode;
2243        status_t result;
2244    public:
2245        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2246            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2247        }
2248        status_t getResult() const {
2249            return result;
2250        }
2251        virtual bool handler() {
2252            Mutex::Autolock _l(flinger->mStateLock);
2253            result = flinger->turnElectronBeamOffImplLocked(mode);
2254            return true;
2255        }
2256    };
2257
2258    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2259    status_t res = postMessageSync(msg);
2260    if (res == NO_ERROR) {
2261        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2262
2263        // work-around: when the power-manager calls us we activate the
2264        // animation. eventually, the "on" animation will be called
2265        // by the power-manager itself
2266        mElectronBeamAnimationMode = mode;
2267    }
2268    return res;
2269}
2270
2271// ---------------------------------------------------------------------------
2272
2273status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2274{
2275    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2276    if (hw.canDraw()) {
2277        // we're already on
2278        return NO_ERROR;
2279    }
2280    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2281        electronBeamOnAnimationImplLocked();
2282    }
2283
2284    // make sure to redraw the whole screen when the animation is done
2285    mDirtyRegion.set(hw.bounds());
2286    signalTransaction();
2287
2288    return NO_ERROR;
2289}
2290
2291status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2292{
2293    class MessageTurnElectronBeamOn : public MessageBase {
2294        SurfaceFlinger* flinger;
2295        int32_t mode;
2296        status_t result;
2297    public:
2298        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2299            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2300        }
2301        status_t getResult() const {
2302            return result;
2303        }
2304        virtual bool handler() {
2305            Mutex::Autolock _l(flinger->mStateLock);
2306            result = flinger->turnElectronBeamOnImplLocked(mode);
2307            return true;
2308        }
2309    };
2310
2311    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2312    return NO_ERROR;
2313}
2314
2315// ---------------------------------------------------------------------------
2316
2317status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2318        sp<IMemoryHeap>* heap,
2319        uint32_t* w, uint32_t* h, PixelFormat* f,
2320        uint32_t sw, uint32_t sh,
2321        uint32_t minLayerZ, uint32_t maxLayerZ)
2322{
2323    ATRACE_CALL();
2324
2325    status_t result = PERMISSION_DENIED;
2326
2327    // only one display supported for now
2328    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2329        return BAD_VALUE;
2330
2331    if (!GLExtensions::getInstance().haveFramebufferObject())
2332        return INVALID_OPERATION;
2333
2334    // get screen geometry
2335    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2336    const uint32_t hw_w = hw.getWidth();
2337    const uint32_t hw_h = hw.getHeight();
2338
2339    if ((sw > hw_w) || (sh > hw_h))
2340        return BAD_VALUE;
2341
2342    sw = (!sw) ? hw_w : sw;
2343    sh = (!sh) ? hw_h : sh;
2344    const size_t size = sw * sh * 4;
2345
2346    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2347    //        sw, sh, minLayerZ, maxLayerZ);
2348
2349    // make sure to clear all GL error flags
2350    while ( glGetError() != GL_NO_ERROR ) ;
2351
2352    // create a FBO
2353    GLuint name, tname;
2354    glGenRenderbuffersOES(1, &tname);
2355    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2356    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2357
2358    glGenFramebuffersOES(1, &name);
2359    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2360    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2361            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2362
2363    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2364
2365    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2366
2367        // invert everything, b/c glReadPixel() below will invert the FB
2368        glViewport(0, 0, sw, sh);
2369        glMatrixMode(GL_PROJECTION);
2370        glPushMatrix();
2371        glLoadIdentity();
2372        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2373        glMatrixMode(GL_MODELVIEW);
2374
2375        // redraw the screen entirely...
2376        glClearColor(0,0,0,1);
2377        glClear(GL_COLOR_BUFFER_BIT);
2378
2379        const LayerVector& layers(mDrawingState.layersSortedByZ);
2380        const size_t count = layers.size();
2381        for (size_t i=0 ; i<count ; ++i) {
2382            const sp<LayerBase>& layer(layers[i]);
2383            const uint32_t flags = layer->drawingState().flags;
2384            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2385                const uint32_t z = layer->drawingState().z;
2386                if (z >= minLayerZ && z <= maxLayerZ) {
2387                    layer->drawForSreenShot();
2388                }
2389            }
2390        }
2391
2392        // check for errors and return screen capture
2393        if (glGetError() != GL_NO_ERROR) {
2394            // error while rendering
2395            result = INVALID_OPERATION;
2396        } else {
2397            // allocate shared memory large enough to hold the
2398            // screen capture
2399            sp<MemoryHeapBase> base(
2400                    new MemoryHeapBase(size, 0, "screen-capture") );
2401            void* const ptr = base->getBase();
2402            if (ptr) {
2403                // capture the screen with glReadPixels()
2404                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2405                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2406                if (glGetError() == GL_NO_ERROR) {
2407                    *heap = base;
2408                    *w = sw;
2409                    *h = sh;
2410                    *f = PIXEL_FORMAT_RGBA_8888;
2411                    result = NO_ERROR;
2412                }
2413            } else {
2414                result = NO_MEMORY;
2415            }
2416        }
2417        glViewport(0, 0, hw_w, hw_h);
2418        glMatrixMode(GL_PROJECTION);
2419        glPopMatrix();
2420        glMatrixMode(GL_MODELVIEW);
2421    } else {
2422        result = BAD_VALUE;
2423    }
2424
2425    // release FBO resources
2426    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2427    glDeleteRenderbuffersOES(1, &tname);
2428    glDeleteFramebuffersOES(1, &name);
2429
2430    hw.compositionComplete();
2431
2432    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2433
2434    return result;
2435}
2436
2437
2438status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2439        sp<IMemoryHeap>* heap,
2440        uint32_t* width, uint32_t* height, PixelFormat* format,
2441        uint32_t sw, uint32_t sh,
2442        uint32_t minLayerZ, uint32_t maxLayerZ)
2443{
2444    // only one display supported for now
2445    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2446        return BAD_VALUE;
2447
2448    if (!GLExtensions::getInstance().haveFramebufferObject())
2449        return INVALID_OPERATION;
2450
2451    class MessageCaptureScreen : public MessageBase {
2452        SurfaceFlinger* flinger;
2453        DisplayID dpy;
2454        sp<IMemoryHeap>* heap;
2455        uint32_t* w;
2456        uint32_t* h;
2457        PixelFormat* f;
2458        uint32_t sw;
2459        uint32_t sh;
2460        uint32_t minLayerZ;
2461        uint32_t maxLayerZ;
2462        status_t result;
2463    public:
2464        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2465                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2466                uint32_t sw, uint32_t sh,
2467                uint32_t minLayerZ, uint32_t maxLayerZ)
2468            : flinger(flinger), dpy(dpy),
2469              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2470              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2471              result(PERMISSION_DENIED)
2472        {
2473        }
2474        status_t getResult() const {
2475            return result;
2476        }
2477        virtual bool handler() {
2478            Mutex::Autolock _l(flinger->mStateLock);
2479
2480            // if we have secure windows, never allow the screen capture
2481            if (flinger->mSecureFrameBuffer)
2482                return true;
2483
2484            result = flinger->captureScreenImplLocked(dpy,
2485                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2486
2487            return true;
2488        }
2489    };
2490
2491    sp<MessageBase> msg = new MessageCaptureScreen(this,
2492            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2493    status_t res = postMessageSync(msg);
2494    if (res == NO_ERROR) {
2495        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2496    }
2497    return res;
2498}
2499
2500// ---------------------------------------------------------------------------
2501
2502sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2503{
2504    sp<Layer> result;
2505    Mutex::Autolock _l(mStateLock);
2506    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2507    return result;
2508}
2509
2510// ---------------------------------------------------------------------------
2511
2512Client::Client(const sp<SurfaceFlinger>& flinger)
2513    : mFlinger(flinger), mNameGenerator(1)
2514{
2515}
2516
2517Client::~Client()
2518{
2519    const size_t count = mLayers.size();
2520    for (size_t i=0 ; i<count ; i++) {
2521        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2522        if (layer != 0) {
2523            mFlinger->removeLayer(layer);
2524        }
2525    }
2526}
2527
2528status_t Client::initCheck() const {
2529    return NO_ERROR;
2530}
2531
2532size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2533{
2534    Mutex::Autolock _l(mLock);
2535    size_t name = mNameGenerator++;
2536    mLayers.add(name, layer);
2537    return name;
2538}
2539
2540void Client::detachLayer(const LayerBaseClient* layer)
2541{
2542    Mutex::Autolock _l(mLock);
2543    // we do a linear search here, because this doesn't happen often
2544    const size_t count = mLayers.size();
2545    for (size_t i=0 ; i<count ; i++) {
2546        if (mLayers.valueAt(i) == layer) {
2547            mLayers.removeItemsAt(i, 1);
2548            break;
2549        }
2550    }
2551}
2552sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2553{
2554    Mutex::Autolock _l(mLock);
2555    sp<LayerBaseClient> lbc;
2556    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2557    if (layer != 0) {
2558        lbc = layer.promote();
2559        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2560    }
2561    return lbc;
2562}
2563
2564
2565status_t Client::onTransact(
2566    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2567{
2568    // these must be checked
2569     IPCThreadState* ipc = IPCThreadState::self();
2570     const int pid = ipc->getCallingPid();
2571     const int uid = ipc->getCallingUid();
2572     const int self_pid = getpid();
2573     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2574         // we're called from a different process, do the real check
2575         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2576         {
2577             ALOGE("Permission Denial: "
2578                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2579             return PERMISSION_DENIED;
2580         }
2581     }
2582     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2583}
2584
2585
2586sp<ISurface> Client::createSurface(
2587        ISurfaceComposerClient::surface_data_t* params,
2588        const String8& name,
2589        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2590        uint32_t flags)
2591{
2592    /*
2593     * createSurface must be called from the GL thread so that it can
2594     * have access to the GL context.
2595     */
2596
2597    class MessageCreateSurface : public MessageBase {
2598        sp<ISurface> result;
2599        SurfaceFlinger* flinger;
2600        ISurfaceComposerClient::surface_data_t* params;
2601        Client* client;
2602        const String8& name;
2603        DisplayID display;
2604        uint32_t w, h;
2605        PixelFormat format;
2606        uint32_t flags;
2607    public:
2608        MessageCreateSurface(SurfaceFlinger* flinger,
2609                ISurfaceComposerClient::surface_data_t* params,
2610                const String8& name, Client* client,
2611                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2612                uint32_t flags)
2613            : flinger(flinger), params(params), client(client), name(name),
2614              display(display), w(w), h(h), format(format), flags(flags)
2615        {
2616        }
2617        sp<ISurface> getResult() const { return result; }
2618        virtual bool handler() {
2619            result = flinger->createSurface(params, name, client,
2620                    display, w, h, format, flags);
2621            return true;
2622        }
2623    };
2624
2625    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2626            params, name, this, display, w, h, format, flags);
2627    mFlinger->postMessageSync(msg);
2628    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2629}
2630status_t Client::destroySurface(SurfaceID sid) {
2631    return mFlinger->removeSurface(this, sid);
2632}
2633
2634// ---------------------------------------------------------------------------
2635
2636GraphicBufferAlloc::GraphicBufferAlloc() {}
2637
2638GraphicBufferAlloc::~GraphicBufferAlloc() {}
2639
2640sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2641        PixelFormat format, uint32_t usage, status_t* error) {
2642    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2643    status_t err = graphicBuffer->initCheck();
2644    *error = err;
2645    if (err != 0 || graphicBuffer->handle == 0) {
2646        if (err == NO_MEMORY) {
2647            GraphicBuffer::dumpAllocationsToSystemLog();
2648        }
2649        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2650             "failed (%s), handle=%p",
2651                w, h, strerror(-err), graphicBuffer->handle);
2652        return 0;
2653    }
2654    return graphicBuffer;
2655}
2656
2657// ---------------------------------------------------------------------------
2658
2659GraphicPlane::GraphicPlane()
2660    : mHw(0)
2661{
2662}
2663
2664GraphicPlane::~GraphicPlane() {
2665    delete mHw;
2666}
2667
2668bool GraphicPlane::initialized() const {
2669    return mHw ? true : false;
2670}
2671
2672int GraphicPlane::getWidth() const {
2673    return mWidth;
2674}
2675
2676int GraphicPlane::getHeight() const {
2677    return mHeight;
2678}
2679
2680void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2681{
2682    mHw = hw;
2683
2684    // initialize the display orientation transform.
2685    // it's a constant that should come from the display driver.
2686    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2687    char property[PROPERTY_VALUE_MAX];
2688    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2689        //displayOrientation
2690        switch (atoi(property)) {
2691        case 90:
2692            displayOrientation = ISurfaceComposer::eOrientation90;
2693            break;
2694        case 270:
2695            displayOrientation = ISurfaceComposer::eOrientation270;
2696            break;
2697        }
2698    }
2699
2700    const float w = hw->getWidth();
2701    const float h = hw->getHeight();
2702    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2703            &mDisplayTransform);
2704    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2705        mDisplayWidth = h;
2706        mDisplayHeight = w;
2707    } else {
2708        mDisplayWidth = w;
2709        mDisplayHeight = h;
2710    }
2711
2712    setOrientation(ISurfaceComposer::eOrientationDefault);
2713}
2714
2715status_t GraphicPlane::orientationToTransfrom(
2716        int orientation, int w, int h, Transform* tr)
2717{
2718    uint32_t flags = 0;
2719    switch (orientation) {
2720    case ISurfaceComposer::eOrientationDefault:
2721        flags = Transform::ROT_0;
2722        break;
2723    case ISurfaceComposer::eOrientation90:
2724        flags = Transform::ROT_90;
2725        break;
2726    case ISurfaceComposer::eOrientation180:
2727        flags = Transform::ROT_180;
2728        break;
2729    case ISurfaceComposer::eOrientation270:
2730        flags = Transform::ROT_270;
2731        break;
2732    default:
2733        return BAD_VALUE;
2734    }
2735    tr->set(flags, w, h);
2736    return NO_ERROR;
2737}
2738
2739status_t GraphicPlane::setOrientation(int orientation)
2740{
2741    // If the rotation can be handled in hardware, this is where
2742    // the magic should happen.
2743
2744    const DisplayHardware& hw(displayHardware());
2745    const float w = mDisplayWidth;
2746    const float h = mDisplayHeight;
2747    mWidth = int(w);
2748    mHeight = int(h);
2749
2750    Transform orientationTransform;
2751    GraphicPlane::orientationToTransfrom(orientation, w, h,
2752            &orientationTransform);
2753    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2754        mWidth = int(h);
2755        mHeight = int(w);
2756    }
2757
2758    mOrientation = orientation;
2759    mGlobalTransform = mDisplayTransform * orientationTransform;
2760    return NO_ERROR;
2761}
2762
2763const DisplayHardware& GraphicPlane::displayHardware() const {
2764    return *mHw;
2765}
2766
2767DisplayHardware& GraphicPlane::editDisplayHardware() {
2768    return *mHw;
2769}
2770
2771const Transform& GraphicPlane::transform() const {
2772    return mGlobalTransform;
2773}
2774
2775EGLDisplay GraphicPlane::getEGLDisplay() const {
2776    return mHw->getEGLDisplay();
2777}
2778
2779// ---------------------------------------------------------------------------
2780
2781}; // namespace android
2782