SurfaceFlinger.cpp revision 90ac799241f077a7b7e6c1875fd933864c8dd2a7 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35#include <binder/PermissionCache.h>
36
37#include <gui/IDisplayEventConnection.h>
38
39#include <utils/String8.h>
40#include <utils/String16.h>
41#include <utils/StopWatch.h>
42
43#include <ui/GraphicBufferAllocator.h>
44#include <ui/PixelFormat.h>
45
46#include <GLES/gl.h>
47
48#include "clz.h"
49#include "DdmConnection.h"
50#include "DisplayEventConnection.h"
51#include "EventThread.h"
52#include "GLExtensions.h"
53#include "Layer.h"
54#include "LayerDim.h"
55#include "LayerScreenshot.h"
56#include "SurfaceFlinger.h"
57
58#include "DisplayHardware/DisplayHardware.h"
59#include "DisplayHardware/HWComposer.h"
60
61#include <private/android_filesystem_config.h>
62#include <private/gui/SharedBufferStack.h>
63
64#define EGL_VERSION_HW_ANDROID  0x3143
65
66#define DISPLAY_COUNT       1
67
68namespace android {
69// ---------------------------------------------------------------------------
70
71const String16 sHardwareTest("android.permission.HARDWARE_TEST");
72const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
73const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
74const String16 sDump("android.permission.DUMP");
75
76// ---------------------------------------------------------------------------
77
78SurfaceFlinger::SurfaceFlinger()
79    :   BnSurfaceComposer(), Thread(false),
80        mTransactionFlags(0),
81        mTransationPending(false),
82        mLayersRemoved(false),
83        mBootTime(systemTime()),
84        mVisibleRegionsDirty(false),
85        mHwWorkListDirty(false),
86        mElectronBeamAnimationMode(0),
87        mDebugRegion(0),
88        mDebugBackground(0),
89        mDebugDDMS(0),
90        mDebugDisableHWC(0),
91        mDebugDisableTransformHint(0),
92        mDebugInSwapBuffers(0),
93        mLastSwapBufferTime(0),
94        mDebugInTransaction(0),
95        mLastTransactionTime(0),
96        mBootFinished(false),
97        mConsoleSignals(0),
98        mSecureFrameBuffer(0)
99{
100    init();
101}
102
103void SurfaceFlinger::init()
104{
105    ALOGI("SurfaceFlinger is starting");
106
107    // debugging stuff...
108    char value[PROPERTY_VALUE_MAX];
109
110    property_get("debug.sf.showupdates", value, "0");
111    mDebugRegion = atoi(value);
112
113    property_get("debug.sf.showbackground", value, "0");
114    mDebugBackground = atoi(value);
115
116    property_get("debug.sf.ddms", value, "0");
117    mDebugDDMS = atoi(value);
118    if (mDebugDDMS) {
119        DdmConnection::start(getServiceName());
120    }
121
122    ALOGI_IF(mDebugRegion,       "showupdates enabled");
123    ALOGI_IF(mDebugBackground,   "showbackground enabled");
124    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
125}
126
127void SurfaceFlinger::onFirstRef()
128{
129    mEventQueue.init(this);
130
131    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
132
133    // Wait for the main thread to be done with its initialization
134    mReadyToRunBarrier.wait();
135}
136
137
138SurfaceFlinger::~SurfaceFlinger()
139{
140    glDeleteTextures(1, &mWormholeTexName);
141}
142
143void SurfaceFlinger::binderDied(const wp<IBinder>& who)
144{
145    // the window manager died on us. prepare its eulogy.
146
147    // reset screen orientation
148    Vector<ComposerState> state;
149    setTransactionState(state, eOrientationDefault, 0);
150
151    // restart the boot-animation
152    property_set("ctl.start", "bootanim");
153}
154
155sp<IMemoryHeap> SurfaceFlinger::getCblk() const
156{
157    return mServerHeap;
158}
159
160sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
161{
162    sp<ISurfaceComposerClient> bclient;
163    sp<Client> client(new Client(this));
164    status_t err = client->initCheck();
165    if (err == NO_ERROR) {
166        bclient = client;
167    }
168    return bclient;
169}
170
171sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
172{
173    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
174    return gba;
175}
176
177const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
178{
179    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
180    const GraphicPlane& plane(mGraphicPlanes[dpy]);
181    return plane;
182}
183
184GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
185{
186    return const_cast<GraphicPlane&>(
187        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
188}
189
190void SurfaceFlinger::bootFinished()
191{
192    const nsecs_t now = systemTime();
193    const nsecs_t duration = now - mBootTime;
194    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
195    mBootFinished = true;
196
197    // wait patiently for the window manager death
198    const String16 name("window");
199    sp<IBinder> window(defaultServiceManager()->getService(name));
200    if (window != 0) {
201        window->linkToDeath(this);
202    }
203
204    // stop boot animation
205    property_set("ctl.stop", "bootanim");
206}
207
208static inline uint16_t pack565(int r, int g, int b) {
209    return (r<<11)|(g<<5)|b;
210}
211
212status_t SurfaceFlinger::readyToRun()
213{
214    ALOGI(   "SurfaceFlinger's main thread ready to run. "
215            "Initializing graphics H/W...");
216
217    // we only support one display currently
218    int dpy = 0;
219
220    {
221        // initialize the main display
222        GraphicPlane& plane(graphicPlane(dpy));
223        DisplayHardware* const hw = new DisplayHardware(this, dpy);
224        plane.setDisplayHardware(hw);
225    }
226
227    // create the shared control-block
228    mServerHeap = new MemoryHeapBase(4096,
229            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
230    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
231
232    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
233    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
234
235    new(mServerCblk) surface_flinger_cblk_t;
236
237    // initialize primary screen
238    // (other display should be initialized in the same manner, but
239    // asynchronously, as they could come and go. None of this is supported
240    // yet).
241    const GraphicPlane& plane(graphicPlane(dpy));
242    const DisplayHardware& hw = plane.displayHardware();
243    const uint32_t w = hw.getWidth();
244    const uint32_t h = hw.getHeight();
245    const uint32_t f = hw.getFormat();
246    hw.makeCurrent();
247
248    // initialize the shared control block
249    mServerCblk->connected |= 1<<dpy;
250    display_cblk_t* dcblk = mServerCblk->displays + dpy;
251    memset(dcblk, 0, sizeof(display_cblk_t));
252    dcblk->w            = plane.getWidth();
253    dcblk->h            = plane.getHeight();
254    dcblk->format       = f;
255    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
256    dcblk->xdpi         = hw.getDpiX();
257    dcblk->ydpi         = hw.getDpiY();
258    dcblk->fps          = hw.getRefreshRate();
259    dcblk->density      = hw.getDensity();
260
261    // Initialize OpenGL|ES
262    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
263    glPixelStorei(GL_PACK_ALIGNMENT, 4);
264    glEnableClientState(GL_VERTEX_ARRAY);
265    glEnable(GL_SCISSOR_TEST);
266    glShadeModel(GL_FLAT);
267    glDisable(GL_DITHER);
268    glDisable(GL_CULL_FACE);
269
270    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
271    const uint16_t g1 = pack565(0x17,0x2f,0x17);
272    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
273    glGenTextures(1, &mWormholeTexName);
274    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
275    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
276    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
277    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
278    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
279    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
280            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
281
282    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
283    glGenTextures(1, &mProtectedTexName);
284    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
285    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
286    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
287    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
288    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
289    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
290            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
291
292    glViewport(0, 0, w, h);
293    glMatrixMode(GL_PROJECTION);
294    glLoadIdentity();
295    // put the origin in the left-bottom corner
296    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
297
298
299    // start the EventThread
300    mEventThread = new EventThread(this);
301    mEventQueue.setEventThread(mEventThread);
302    hw.startSleepManagement();
303
304    /*
305     *  We're now ready to accept clients...
306     */
307
308    mReadyToRunBarrier.open();
309
310    // start boot animation
311    property_set("ctl.start", "bootanim");
312
313    return NO_ERROR;
314}
315
316// ----------------------------------------------------------------------------
317
318bool SurfaceFlinger::authenticateSurfaceTexture(
319        const sp<ISurfaceTexture>& surfaceTexture) const {
320    Mutex::Autolock _l(mStateLock);
321    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
322
323    // Check the visible layer list for the ISurface
324    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
325    size_t count = currentLayers.size();
326    for (size_t i=0 ; i<count ; i++) {
327        const sp<LayerBase>& layer(currentLayers[i]);
328        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
329        if (lbc != NULL) {
330            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
331            if (lbcBinder == surfaceTextureBinder) {
332                return true;
333            }
334        }
335    }
336
337    // Check the layers in the purgatory.  This check is here so that if a
338    // SurfaceTexture gets destroyed before all the clients are done using it,
339    // the error will not be reported as "surface XYZ is not authenticated", but
340    // will instead fail later on when the client tries to use the surface,
341    // which should be reported as "surface XYZ returned an -ENODEV".  The
342    // purgatorized layers are no less authentic than the visible ones, so this
343    // should not cause any harm.
344    size_t purgatorySize =  mLayerPurgatory.size();
345    for (size_t i=0 ; i<purgatorySize ; i++) {
346        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
347        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
348        if (lbc != NULL) {
349            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
350            if (lbcBinder == surfaceTextureBinder) {
351                return true;
352            }
353        }
354    }
355
356    return false;
357}
358
359// ----------------------------------------------------------------------------
360
361sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
362    return mEventThread->createEventConnection();
363}
364
365// ----------------------------------------------------------------------------
366
367void SurfaceFlinger::waitForEvent() {
368    mEventQueue.waitMessage();
369}
370
371void SurfaceFlinger::signalTransaction() {
372    mEventQueue.invalidate();
373}
374
375void SurfaceFlinger::signalLayerUpdate() {
376    mEventQueue.invalidate();
377}
378
379void SurfaceFlinger::signalRefresh() {
380    mEventQueue.refresh();
381}
382
383status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
384        nsecs_t reltime, uint32_t flags) {
385    return mEventQueue.postMessage(msg, reltime);
386}
387
388status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
389        nsecs_t reltime, uint32_t flags) {
390    status_t res = mEventQueue.postMessage(msg, reltime);
391    if (res == NO_ERROR) {
392        msg->wait();
393    }
394    return res;
395}
396
397bool SurfaceFlinger::threadLoop()
398{
399    waitForEvent();
400    return true;
401}
402
403void SurfaceFlinger::onMessageReceived(int32_t what)
404{
405    switch (what) {
406        case MessageQueue::REFRESH: {
407//        case MessageQueue::INVALIDATE: {
408            // check for transactions
409            if (CC_UNLIKELY(mConsoleSignals)) {
410                handleConsoleEvents();
411            }
412
413            // if we're in a global transaction, don't do anything.
414            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
415            uint32_t transactionFlags = peekTransactionFlags(mask);
416            if (CC_UNLIKELY(transactionFlags)) {
417                handleTransaction(transactionFlags);
418            }
419
420            // post surfaces (if needed)
421            handlePageFlip();
422
423//            signalRefresh();
424//
425//        } break;
426//
427//        case MessageQueue::REFRESH: {
428
429            handleRefresh();
430
431            const DisplayHardware& hw(graphicPlane(0).displayHardware());
432
433//            if (mDirtyRegion.isEmpty()) {
434//                return;
435//            }
436
437            if (CC_UNLIKELY(mHwWorkListDirty)) {
438                // build the h/w work list
439                handleWorkList();
440            }
441
442            if (CC_LIKELY(hw.canDraw())) {
443                // repaint the framebuffer (if needed)
444                handleRepaint();
445                // inform the h/w that we're done compositing
446                hw.compositionComplete();
447                postFramebuffer();
448            } else {
449                // pretend we did the post
450                hw.compositionComplete();
451            }
452
453        } break;
454    }
455}
456
457void SurfaceFlinger::postFramebuffer()
458{
459    // mSwapRegion can be empty here is some cases, for instance if a hidden
460    // or fully transparent window is updating.
461    // in that case, we need to flip anyways to not risk a deadlock with
462    // h/w composer.
463
464    const DisplayHardware& hw(graphicPlane(0).displayHardware());
465    const nsecs_t now = systemTime();
466    mDebugInSwapBuffers = now;
467    hw.flip(mSwapRegion);
468
469    size_t numLayers = mVisibleLayersSortedByZ.size();
470    for (size_t i = 0; i < numLayers; i++) {
471        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
472    }
473
474    mLastSwapBufferTime = systemTime() - now;
475    mDebugInSwapBuffers = 0;
476    mSwapRegion.clear();
477}
478
479void SurfaceFlinger::handleConsoleEvents()
480{
481    // something to do with the console
482    const DisplayHardware& hw = graphicPlane(0).displayHardware();
483
484    int what = android_atomic_and(0, &mConsoleSignals);
485    if (what & eConsoleAcquired) {
486        hw.acquireScreen();
487        // this is a temporary work-around, eventually this should be called
488        // by the power-manager
489        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
490    }
491
492    if (what & eConsoleReleased) {
493        if (hw.isScreenAcquired()) {
494            hw.releaseScreen();
495        }
496    }
497
498    mDirtyRegion.set(hw.bounds());
499}
500
501void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
502{
503    Mutex::Autolock _l(mStateLock);
504    const nsecs_t now = systemTime();
505    mDebugInTransaction = now;
506
507    // Here we're guaranteed that some transaction flags are set
508    // so we can call handleTransactionLocked() unconditionally.
509    // We call getTransactionFlags(), which will also clear the flags,
510    // with mStateLock held to guarantee that mCurrentState won't change
511    // until the transaction is committed.
512
513    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
514    transactionFlags = getTransactionFlags(mask);
515    handleTransactionLocked(transactionFlags);
516
517    mLastTransactionTime = systemTime() - now;
518    mDebugInTransaction = 0;
519    invalidateHwcGeometry();
520    // here the transaction has been committed
521}
522
523void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
524{
525    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
526    const size_t count = currentLayers.size();
527
528    /*
529     * Traversal of the children
530     * (perform the transaction for each of them if needed)
531     */
532
533    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
534    if (layersNeedTransaction) {
535        for (size_t i=0 ; i<count ; i++) {
536            const sp<LayerBase>& layer = currentLayers[i];
537            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
538            if (!trFlags) continue;
539
540            const uint32_t flags = layer->doTransaction(0);
541            if (flags & Layer::eVisibleRegion)
542                mVisibleRegionsDirty = true;
543        }
544    }
545
546    /*
547     * Perform our own transaction if needed
548     */
549
550    if (transactionFlags & eTransactionNeeded) {
551        if (mCurrentState.orientation != mDrawingState.orientation) {
552            // the orientation has changed, recompute all visible regions
553            // and invalidate everything.
554
555            const int dpy = 0;
556            const int orientation = mCurrentState.orientation;
557            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
558            GraphicPlane& plane(graphicPlane(dpy));
559            plane.setOrientation(orientation);
560
561            // update the shared control block
562            const DisplayHardware& hw(plane.displayHardware());
563            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
564            dcblk->orientation = orientation;
565            dcblk->w = plane.getWidth();
566            dcblk->h = plane.getHeight();
567
568            mVisibleRegionsDirty = true;
569            mDirtyRegion.set(hw.bounds());
570        }
571
572        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
573            // layers have been added
574            mVisibleRegionsDirty = true;
575        }
576
577        // some layers might have been removed, so
578        // we need to update the regions they're exposing.
579        if (mLayersRemoved) {
580            mLayersRemoved = false;
581            mVisibleRegionsDirty = true;
582            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
583            const size_t count = previousLayers.size();
584            for (size_t i=0 ; i<count ; i++) {
585                const sp<LayerBase>& layer(previousLayers[i]);
586                if (currentLayers.indexOf( layer ) < 0) {
587                    // this layer is not visible anymore
588                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
589                }
590            }
591        }
592    }
593
594    commitTransaction();
595}
596
597void SurfaceFlinger::computeVisibleRegions(
598    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
599{
600    const GraphicPlane& plane(graphicPlane(0));
601    const Transform& planeTransform(plane.transform());
602    const DisplayHardware& hw(plane.displayHardware());
603    const Region screenRegion(hw.bounds());
604
605    Region aboveOpaqueLayers;
606    Region aboveCoveredLayers;
607    Region dirty;
608
609    bool secureFrameBuffer = false;
610
611    size_t i = currentLayers.size();
612    while (i--) {
613        const sp<LayerBase>& layer = currentLayers[i];
614        layer->validateVisibility(planeTransform);
615
616        // start with the whole surface at its current location
617        const Layer::State& s(layer->drawingState());
618
619        /*
620         * opaqueRegion: area of a surface that is fully opaque.
621         */
622        Region opaqueRegion;
623
624        /*
625         * visibleRegion: area of a surface that is visible on screen
626         * and not fully transparent. This is essentially the layer's
627         * footprint minus the opaque regions above it.
628         * Areas covered by a translucent surface are considered visible.
629         */
630        Region visibleRegion;
631
632        /*
633         * coveredRegion: area of a surface that is covered by all
634         * visible regions above it (which includes the translucent areas).
635         */
636        Region coveredRegion;
637
638
639        // handle hidden surfaces by setting the visible region to empty
640        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
641            const bool translucent = !layer->isOpaque();
642            const Rect bounds(layer->visibleBounds());
643            visibleRegion.set(bounds);
644            visibleRegion.andSelf(screenRegion);
645            if (!visibleRegion.isEmpty()) {
646                // Remove the transparent area from the visible region
647                if (translucent) {
648                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
649                }
650
651                // compute the opaque region
652                const int32_t layerOrientation = layer->getOrientation();
653                if (s.alpha==255 && !translucent &&
654                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
655                    // the opaque region is the layer's footprint
656                    opaqueRegion = visibleRegion;
657                }
658            }
659        }
660
661        // Clip the covered region to the visible region
662        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
663
664        // Update aboveCoveredLayers for next (lower) layer
665        aboveCoveredLayers.orSelf(visibleRegion);
666
667        // subtract the opaque region covered by the layers above us
668        visibleRegion.subtractSelf(aboveOpaqueLayers);
669
670        // compute this layer's dirty region
671        if (layer->contentDirty) {
672            // we need to invalidate the whole region
673            dirty = visibleRegion;
674            // as well, as the old visible region
675            dirty.orSelf(layer->visibleRegionScreen);
676            layer->contentDirty = false;
677        } else {
678            /* compute the exposed region:
679             *   the exposed region consists of two components:
680             *   1) what's VISIBLE now and was COVERED before
681             *   2) what's EXPOSED now less what was EXPOSED before
682             *
683             * note that (1) is conservative, we start with the whole
684             * visible region but only keep what used to be covered by
685             * something -- which mean it may have been exposed.
686             *
687             * (2) handles areas that were not covered by anything but got
688             * exposed because of a resize.
689             */
690            const Region newExposed = visibleRegion - coveredRegion;
691            const Region oldVisibleRegion = layer->visibleRegionScreen;
692            const Region oldCoveredRegion = layer->coveredRegionScreen;
693            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
694            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
695        }
696        dirty.subtractSelf(aboveOpaqueLayers);
697
698        // accumulate to the screen dirty region
699        dirtyRegion.orSelf(dirty);
700
701        // Update aboveOpaqueLayers for next (lower) layer
702        aboveOpaqueLayers.orSelf(opaqueRegion);
703
704        // Store the visible region is screen space
705        layer->setVisibleRegion(visibleRegion);
706        layer->setCoveredRegion(coveredRegion);
707
708        // If a secure layer is partially visible, lock-down the screen!
709        if (layer->isSecure() && !visibleRegion.isEmpty()) {
710            secureFrameBuffer = true;
711        }
712    }
713
714    // invalidate the areas where a layer was removed
715    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
716    mDirtyRegionRemovedLayer.clear();
717
718    mSecureFrameBuffer = secureFrameBuffer;
719    opaqueRegion = aboveOpaqueLayers;
720}
721
722
723void SurfaceFlinger::commitTransaction()
724{
725    if (!mLayersPendingRemoval.isEmpty()) {
726        // Notify removed layers now that they can't be drawn from
727        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
728            mLayersPendingRemoval[i]->onRemoved();
729        }
730        mLayersPendingRemoval.clear();
731    }
732
733    mDrawingState = mCurrentState;
734    mTransationPending = false;
735    mTransactionCV.broadcast();
736}
737
738void SurfaceFlinger::handlePageFlip()
739{
740    const DisplayHardware& hw = graphicPlane(0).displayHardware();
741    const Region screenRegion(hw.bounds());
742
743    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
744    const bool visibleRegions = lockPageFlip(currentLayers);
745
746        if (visibleRegions || mVisibleRegionsDirty) {
747            Region opaqueRegion;
748            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
749
750            /*
751             *  rebuild the visible layer list
752             */
753            const size_t count = currentLayers.size();
754            mVisibleLayersSortedByZ.clear();
755            mVisibleLayersSortedByZ.setCapacity(count);
756            for (size_t i=0 ; i<count ; i++) {
757                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
758                    mVisibleLayersSortedByZ.add(currentLayers[i]);
759            }
760
761            mWormholeRegion = screenRegion.subtract(opaqueRegion);
762            mVisibleRegionsDirty = false;
763            invalidateHwcGeometry();
764        }
765
766    unlockPageFlip(currentLayers);
767
768    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
769    mDirtyRegion.andSelf(screenRegion);
770}
771
772void SurfaceFlinger::invalidateHwcGeometry()
773{
774    mHwWorkListDirty = true;
775}
776
777bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
778{
779    bool recomputeVisibleRegions = false;
780    size_t count = currentLayers.size();
781    sp<LayerBase> const* layers = currentLayers.array();
782    for (size_t i=0 ; i<count ; i++) {
783        const sp<LayerBase>& layer(layers[i]);
784        layer->lockPageFlip(recomputeVisibleRegions);
785    }
786    return recomputeVisibleRegions;
787}
788
789void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
790{
791    const GraphicPlane& plane(graphicPlane(0));
792    const Transform& planeTransform(plane.transform());
793    const size_t count = currentLayers.size();
794    sp<LayerBase> const* layers = currentLayers.array();
795    for (size_t i=0 ; i<count ; i++) {
796        const sp<LayerBase>& layer(layers[i]);
797        layer->unlockPageFlip(planeTransform, mDirtyRegion);
798    }
799}
800
801void SurfaceFlinger::handleRefresh()
802{
803    bool needInvalidate = false;
804    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
805    const size_t count = currentLayers.size();
806    for (size_t i=0 ; i<count ; i++) {
807        const sp<LayerBase>& layer(currentLayers[i]);
808        if (layer->onPreComposition()) {
809            needInvalidate = true;
810        }
811    }
812    if (needInvalidate) {
813        signalLayerUpdate();
814    }
815}
816
817
818void SurfaceFlinger::handleWorkList()
819{
820    mHwWorkListDirty = false;
821    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
822    if (hwc.initCheck() == NO_ERROR) {
823        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
824        const size_t count = currentLayers.size();
825        hwc.createWorkList(count);
826        hwc_layer_t* const cur(hwc.getLayers());
827        for (size_t i=0 ; cur && i<count ; i++) {
828            currentLayers[i]->setGeometry(&cur[i]);
829            if (mDebugDisableHWC || mDebugRegion) {
830                cur[i].compositionType = HWC_FRAMEBUFFER;
831                cur[i].flags |= HWC_SKIP_LAYER;
832            }
833        }
834    }
835}
836
837void SurfaceFlinger::handleRepaint()
838{
839    // compute the invalid region
840    mSwapRegion.orSelf(mDirtyRegion);
841
842    if (CC_UNLIKELY(mDebugRegion)) {
843        debugFlashRegions();
844    }
845
846    // set the frame buffer
847    const DisplayHardware& hw(graphicPlane(0).displayHardware());
848    glMatrixMode(GL_MODELVIEW);
849    glLoadIdentity();
850
851    uint32_t flags = hw.getFlags();
852    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
853        (flags & DisplayHardware::BUFFER_PRESERVED))
854    {
855        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
856        // takes a rectangle, we must make sure to update that whole
857        // rectangle in that case
858        if (flags & DisplayHardware::SWAP_RECTANGLE) {
859            // TODO: we really should be able to pass a region to
860            // SWAP_RECTANGLE so that we don't have to redraw all this.
861            mDirtyRegion.set(mSwapRegion.bounds());
862        } else {
863            // in the BUFFER_PRESERVED case, obviously, we can update only
864            // what's needed and nothing more.
865            // NOTE: this is NOT a common case, as preserving the backbuffer
866            // is costly and usually involves copying the whole update back.
867        }
868    } else {
869        if (flags & DisplayHardware::PARTIAL_UPDATES) {
870            // We need to redraw the rectangle that will be updated
871            // (pushed to the framebuffer).
872            // This is needed because PARTIAL_UPDATES only takes one
873            // rectangle instead of a region (see DisplayHardware::flip())
874            mDirtyRegion.set(mSwapRegion.bounds());
875        } else {
876            // we need to redraw everything (the whole screen)
877            mDirtyRegion.set(hw.bounds());
878            mSwapRegion = mDirtyRegion;
879        }
880    }
881
882    setupHardwareComposer(mDirtyRegion);
883    composeSurfaces(mDirtyRegion);
884
885    // update the swap region and clear the dirty region
886    mSwapRegion.orSelf(mDirtyRegion);
887    mDirtyRegion.clear();
888}
889
890void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
891{
892    const DisplayHardware& hw(graphicPlane(0).displayHardware());
893    HWComposer& hwc(hw.getHwComposer());
894    hwc_layer_t* const cur(hwc.getLayers());
895    if (!cur) {
896        return;
897    }
898
899    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
900    size_t count = layers.size();
901
902    ALOGE_IF(hwc.getNumLayers() != count,
903            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
904            hwc.getNumLayers(), count);
905
906    // just to be extra-safe, use the smallest count
907    if (hwc.initCheck() == NO_ERROR) {
908        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
909    }
910
911    /*
912     *  update the per-frame h/w composer data for each layer
913     *  and build the transparent region of the FB
914     */
915    for (size_t i=0 ; i<count ; i++) {
916        const sp<LayerBase>& layer(layers[i]);
917        layer->setPerFrameData(&cur[i]);
918    }
919    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
920    status_t err = hwc.prepare();
921    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
922
923    if (err == NO_ERROR) {
924        // what's happening here is tricky.
925        // we want to clear all the layers with the CLEAR_FB flags
926        // that are opaque.
927        // however, since some GPU are efficient at preserving
928        // the backbuffer, we want to take advantage of that so we do the
929        // clear only in the dirty region (other areas will be preserved
930        // on those GPUs).
931        //   NOTE: on non backbuffer preserving GPU, the dirty region
932        //   has already been expanded as needed, so the code is correct
933        //   there too.
934        //
935        // However, the content of the framebuffer cannot be trusted when
936        // we switch to/from FB/OVERLAY, in which case we need to
937        // expand the dirty region to those areas too.
938        //
939        // Note also that there is a special case when switching from
940        // "no layers in FB" to "some layers in FB", where we need to redraw
941        // the entire FB, since some areas might contain uninitialized
942        // data.
943        //
944        // Also we want to make sure to not clear areas that belong to
945        // layers above that won't redraw (we would just be erasing them),
946        // that is, we can't erase anything outside the dirty region.
947
948        Region transparent;
949
950        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
951            transparent.set(hw.getBounds());
952            dirtyInOut = transparent;
953        } else {
954            for (size_t i=0 ; i<count ; i++) {
955                const sp<LayerBase>& layer(layers[i]);
956                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
957                    transparent.orSelf(layer->visibleRegionScreen);
958                }
959                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
960                if (isOverlay != layer->isOverlay()) {
961                    // we transitioned to/from overlay, so add this layer
962                    // to the dirty region so the framebuffer can be either
963                    // cleared or redrawn.
964                    dirtyInOut.orSelf(layer->visibleRegionScreen);
965                }
966                layer->setOverlay(isOverlay);
967            }
968            // don't erase stuff outside the dirty region
969            transparent.andSelf(dirtyInOut);
970        }
971
972        /*
973         *  clear the area of the FB that need to be transparent
974         */
975        if (!transparent.isEmpty()) {
976            glClearColor(0,0,0,0);
977            Region::const_iterator it = transparent.begin();
978            Region::const_iterator const end = transparent.end();
979            const int32_t height = hw.getHeight();
980            while (it != end) {
981                const Rect& r(*it++);
982                const GLint sy = height - (r.top + r.height());
983                glScissor(r.left, sy, r.width(), r.height());
984                glClear(GL_COLOR_BUFFER_BIT);
985            }
986        }
987    }
988}
989
990void SurfaceFlinger::composeSurfaces(const Region& dirty)
991{
992    const DisplayHardware& hw(graphicPlane(0).displayHardware());
993    HWComposer& hwc(hw.getHwComposer());
994
995    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
996    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
997        // should never happen unless the window manager has a bug
998        // draw something...
999        drawWormhole();
1000    }
1001
1002    // FIXME: workaroud for b/6020860
1003    glEnable(GL_SCISSOR_TEST);
1004    glScissor(0,0,0,0);
1005    glClear(GL_COLOR_BUFFER_BIT);
1006    // end-workaround
1007
1008    /*
1009     * and then, render the layers targeted at the framebuffer
1010     */
1011    hwc_layer_t* const cur(hwc.getLayers());
1012    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1013    size_t count = layers.size();
1014    for (size_t i=0 ; i<count ; i++) {
1015        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1016            continue;
1017        }
1018        const sp<LayerBase>& layer(layers[i]);
1019        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1020        if (!clip.isEmpty()) {
1021            layer->draw(clip);
1022        }
1023    }
1024}
1025
1026void SurfaceFlinger::debugFlashRegions()
1027{
1028    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1029    const uint32_t flags = hw.getFlags();
1030    const int32_t height = hw.getHeight();
1031    if (mSwapRegion.isEmpty()) {
1032        return;
1033    }
1034
1035    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1036            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1037        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1038                mDirtyRegion.bounds() : hw.bounds());
1039        composeSurfaces(repaint);
1040    }
1041
1042    glDisable(GL_TEXTURE_EXTERNAL_OES);
1043    glDisable(GL_TEXTURE_2D);
1044    glDisable(GL_BLEND);
1045    glDisable(GL_SCISSOR_TEST);
1046
1047    static int toggle = 0;
1048    toggle = 1 - toggle;
1049    if (toggle) {
1050        glColor4f(1, 0, 1, 1);
1051    } else {
1052        glColor4f(1, 1, 0, 1);
1053    }
1054
1055    Region::const_iterator it = mDirtyRegion.begin();
1056    Region::const_iterator const end = mDirtyRegion.end();
1057    while (it != end) {
1058        const Rect& r = *it++;
1059        GLfloat vertices[][2] = {
1060                { r.left,  height - r.top },
1061                { r.left,  height - r.bottom },
1062                { r.right, height - r.bottom },
1063                { r.right, height - r.top }
1064        };
1065        glVertexPointer(2, GL_FLOAT, 0, vertices);
1066        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1067    }
1068
1069    hw.flip(mSwapRegion);
1070
1071    if (mDebugRegion > 1)
1072        usleep(mDebugRegion * 1000);
1073
1074    glEnable(GL_SCISSOR_TEST);
1075}
1076
1077void SurfaceFlinger::drawWormhole() const
1078{
1079    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1080    if (region.isEmpty())
1081        return;
1082
1083    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1084    const int32_t width = hw.getWidth();
1085    const int32_t height = hw.getHeight();
1086
1087    if (CC_LIKELY(!mDebugBackground)) {
1088        glClearColor(0,0,0,0);
1089        Region::const_iterator it = region.begin();
1090        Region::const_iterator const end = region.end();
1091        while (it != end) {
1092            const Rect& r = *it++;
1093            const GLint sy = height - (r.top + r.height());
1094            glScissor(r.left, sy, r.width(), r.height());
1095            glClear(GL_COLOR_BUFFER_BIT);
1096        }
1097    } else {
1098        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1099                { width, height }, { 0, height }  };
1100        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1101
1102        glVertexPointer(2, GL_SHORT, 0, vertices);
1103        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1104        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1105
1106        glDisable(GL_TEXTURE_EXTERNAL_OES);
1107        glEnable(GL_TEXTURE_2D);
1108        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1109        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1110        glMatrixMode(GL_TEXTURE);
1111        glLoadIdentity();
1112
1113        glDisable(GL_BLEND);
1114
1115        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1116        Region::const_iterator it = region.begin();
1117        Region::const_iterator const end = region.end();
1118        while (it != end) {
1119            const Rect& r = *it++;
1120            const GLint sy = height - (r.top + r.height());
1121            glScissor(r.left, sy, r.width(), r.height());
1122            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1123        }
1124        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1125        glDisable(GL_TEXTURE_2D);
1126        glLoadIdentity();
1127        glMatrixMode(GL_MODELVIEW);
1128    }
1129}
1130
1131status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1132{
1133    Mutex::Autolock _l(mStateLock);
1134    addLayer_l(layer);
1135    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1136    return NO_ERROR;
1137}
1138
1139status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1140{
1141    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1142    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1143}
1144
1145ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1146        const sp<LayerBaseClient>& lbc)
1147{
1148    // attach this layer to the client
1149    size_t name = client->attachLayer(lbc);
1150
1151    Mutex::Autolock _l(mStateLock);
1152
1153    // add this layer to the current state list
1154    addLayer_l(lbc);
1155
1156    return ssize_t(name);
1157}
1158
1159status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1160{
1161    Mutex::Autolock _l(mStateLock);
1162    status_t err = purgatorizeLayer_l(layer);
1163    if (err == NO_ERROR)
1164        setTransactionFlags(eTransactionNeeded);
1165    return err;
1166}
1167
1168status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1169{
1170    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1171    if (lbc != 0) {
1172        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1173    }
1174    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1175    if (index >= 0) {
1176        mLayersRemoved = true;
1177        return NO_ERROR;
1178    }
1179    return status_t(index);
1180}
1181
1182status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1183{
1184    // First add the layer to the purgatory list, which makes sure it won't
1185    // go away, then remove it from the main list (through a transaction).
1186    ssize_t err = removeLayer_l(layerBase);
1187    if (err >= 0) {
1188        mLayerPurgatory.add(layerBase);
1189    }
1190
1191    mLayersPendingRemoval.push(layerBase);
1192
1193    // it's possible that we don't find a layer, because it might
1194    // have been destroyed already -- this is not technically an error
1195    // from the user because there is a race between Client::destroySurface(),
1196    // ~Client() and ~ISurface().
1197    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1198}
1199
1200status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1201{
1202    layer->forceVisibilityTransaction();
1203    setTransactionFlags(eTraversalNeeded);
1204    return NO_ERROR;
1205}
1206
1207uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1208{
1209    return android_atomic_release_load(&mTransactionFlags);
1210}
1211
1212uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1213{
1214    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1215}
1216
1217uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1218{
1219    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1220    if ((old & flags)==0) { // wake the server up
1221        signalTransaction();
1222    }
1223    return old;
1224}
1225
1226
1227void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1228        int orientation, uint32_t flags) {
1229    Mutex::Autolock _l(mStateLock);
1230
1231    uint32_t transactionFlags = 0;
1232    if (mCurrentState.orientation != orientation) {
1233        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1234            mCurrentState.orientation = orientation;
1235            transactionFlags |= eTransactionNeeded;
1236        } else if (orientation != eOrientationUnchanged) {
1237            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1238                    orientation);
1239        }
1240    }
1241
1242    const size_t count = state.size();
1243    for (size_t i=0 ; i<count ; i++) {
1244        const ComposerState& s(state[i]);
1245        sp<Client> client( static_cast<Client *>(s.client.get()) );
1246        transactionFlags |= setClientStateLocked(client, s.state);
1247    }
1248
1249    if (transactionFlags) {
1250        // this triggers the transaction
1251        setTransactionFlags(transactionFlags);
1252
1253        // if this is a synchronous transaction, wait for it to take effect
1254        // before returning.
1255        if (flags & eSynchronous) {
1256            mTransationPending = true;
1257        }
1258        while (mTransationPending) {
1259            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1260            if (CC_UNLIKELY(err != NO_ERROR)) {
1261                // just in case something goes wrong in SF, return to the
1262                // called after a few seconds.
1263                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1264                mTransationPending = false;
1265                break;
1266            }
1267        }
1268    }
1269}
1270
1271sp<ISurface> SurfaceFlinger::createSurface(
1272        ISurfaceComposerClient::surface_data_t* params,
1273        const String8& name,
1274        const sp<Client>& client,
1275        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1276        uint32_t flags)
1277{
1278    sp<LayerBaseClient> layer;
1279    sp<ISurface> surfaceHandle;
1280
1281    if (int32_t(w|h) < 0) {
1282        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1283                int(w), int(h));
1284        return surfaceHandle;
1285    }
1286
1287    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1288    sp<Layer> normalLayer;
1289    switch (flags & eFXSurfaceMask) {
1290        case eFXSurfaceNormal:
1291            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1292            layer = normalLayer;
1293            break;
1294        case eFXSurfaceBlur:
1295            // for now we treat Blur as Dim, until we can implement it
1296            // efficiently.
1297        case eFXSurfaceDim:
1298            layer = createDimSurface(client, d, w, h, flags);
1299            break;
1300        case eFXSurfaceScreenshot:
1301            layer = createScreenshotSurface(client, d, w, h, flags);
1302            break;
1303    }
1304
1305    if (layer != 0) {
1306        layer->initStates(w, h, flags);
1307        layer->setName(name);
1308        ssize_t token = addClientLayer(client, layer);
1309
1310        surfaceHandle = layer->getSurface();
1311        if (surfaceHandle != 0) {
1312            params->token = token;
1313            params->identity = layer->getIdentity();
1314            if (normalLayer != 0) {
1315                Mutex::Autolock _l(mStateLock);
1316                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1317            }
1318        }
1319
1320        setTransactionFlags(eTransactionNeeded);
1321    }
1322
1323    return surfaceHandle;
1324}
1325
1326sp<Layer> SurfaceFlinger::createNormalSurface(
1327        const sp<Client>& client, DisplayID display,
1328        uint32_t w, uint32_t h, uint32_t flags,
1329        PixelFormat& format)
1330{
1331    // initialize the surfaces
1332    switch (format) { // TODO: take h/w into account
1333    case PIXEL_FORMAT_TRANSPARENT:
1334    case PIXEL_FORMAT_TRANSLUCENT:
1335        format = PIXEL_FORMAT_RGBA_8888;
1336        break;
1337    case PIXEL_FORMAT_OPAQUE:
1338#ifdef NO_RGBX_8888
1339        format = PIXEL_FORMAT_RGB_565;
1340#else
1341        format = PIXEL_FORMAT_RGBX_8888;
1342#endif
1343        break;
1344    }
1345
1346#ifdef NO_RGBX_8888
1347    if (format == PIXEL_FORMAT_RGBX_8888)
1348        format = PIXEL_FORMAT_RGBA_8888;
1349#endif
1350
1351    sp<Layer> layer = new Layer(this, display, client);
1352    status_t err = layer->setBuffers(w, h, format, flags);
1353    if (CC_LIKELY(err != NO_ERROR)) {
1354        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1355        layer.clear();
1356    }
1357    return layer;
1358}
1359
1360sp<LayerDim> SurfaceFlinger::createDimSurface(
1361        const sp<Client>& client, DisplayID display,
1362        uint32_t w, uint32_t h, uint32_t flags)
1363{
1364    sp<LayerDim> layer = new LayerDim(this, display, client);
1365    return layer;
1366}
1367
1368sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1369        const sp<Client>& client, DisplayID display,
1370        uint32_t w, uint32_t h, uint32_t flags)
1371{
1372    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1373    return layer;
1374}
1375
1376status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1377{
1378    /*
1379     * called by the window manager, when a surface should be marked for
1380     * destruction.
1381     *
1382     * The surface is removed from the current and drawing lists, but placed
1383     * in the purgatory queue, so it's not destroyed right-away (we need
1384     * to wait for all client's references to go away first).
1385     */
1386
1387    status_t err = NAME_NOT_FOUND;
1388    Mutex::Autolock _l(mStateLock);
1389    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1390    if (layer != 0) {
1391        err = purgatorizeLayer_l(layer);
1392        if (err == NO_ERROR) {
1393            setTransactionFlags(eTransactionNeeded);
1394        }
1395    }
1396    return err;
1397}
1398
1399status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1400{
1401    // called by ~ISurface() when all references are gone
1402    status_t err = NO_ERROR;
1403    sp<LayerBaseClient> l(layer.promote());
1404    if (l != NULL) {
1405        Mutex::Autolock _l(mStateLock);
1406        err = removeLayer_l(l);
1407        if (err == NAME_NOT_FOUND) {
1408            // The surface wasn't in the current list, which means it was
1409            // removed already, which means it is in the purgatory,
1410            // and need to be removed from there.
1411            ssize_t idx = mLayerPurgatory.remove(l);
1412            ALOGE_IF(idx < 0,
1413                    "layer=%p is not in the purgatory list", l.get());
1414        }
1415        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1416                "error removing layer=%p (%s)", l.get(), strerror(-err));
1417    }
1418    return err;
1419}
1420
1421uint32_t SurfaceFlinger::setClientStateLocked(
1422        const sp<Client>& client,
1423        const layer_state_t& s)
1424{
1425    uint32_t flags = 0;
1426    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1427    if (layer != 0) {
1428        const uint32_t what = s.what;
1429        if (what & ePositionChanged) {
1430            if (layer->setPosition(s.x, s.y))
1431                flags |= eTraversalNeeded;
1432        }
1433        if (what & eLayerChanged) {
1434            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1435            if (layer->setLayer(s.z)) {
1436                mCurrentState.layersSortedByZ.removeAt(idx);
1437                mCurrentState.layersSortedByZ.add(layer);
1438                // we need traversal (state changed)
1439                // AND transaction (list changed)
1440                flags |= eTransactionNeeded|eTraversalNeeded;
1441            }
1442        }
1443        if (what & eSizeChanged) {
1444            if (layer->setSize(s.w, s.h)) {
1445                flags |= eTraversalNeeded;
1446            }
1447        }
1448        if (what & eAlphaChanged) {
1449            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1450                flags |= eTraversalNeeded;
1451        }
1452        if (what & eMatrixChanged) {
1453            if (layer->setMatrix(s.matrix))
1454                flags |= eTraversalNeeded;
1455        }
1456        if (what & eTransparentRegionChanged) {
1457            if (layer->setTransparentRegionHint(s.transparentRegion))
1458                flags |= eTraversalNeeded;
1459        }
1460        if (what & eVisibilityChanged) {
1461            if (layer->setFlags(s.flags, s.mask))
1462                flags |= eTraversalNeeded;
1463        }
1464    }
1465    return flags;
1466}
1467
1468void SurfaceFlinger::screenReleased(int dpy)
1469{
1470    // this may be called by a signal handler, we can't do too much in here
1471    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1472    signalTransaction();
1473}
1474
1475void SurfaceFlinger::screenAcquired(int dpy)
1476{
1477    // this may be called by a signal handler, we can't do too much in here
1478    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1479    signalTransaction();
1480}
1481
1482status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1483{
1484    const size_t SIZE = 4096;
1485    char buffer[SIZE];
1486    String8 result;
1487
1488    if (!PermissionCache::checkCallingPermission(sDump)) {
1489        snprintf(buffer, SIZE, "Permission Denial: "
1490                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1491                IPCThreadState::self()->getCallingPid(),
1492                IPCThreadState::self()->getCallingUid());
1493        result.append(buffer);
1494    } else {
1495        // Try to get the main lock, but don't insist if we can't
1496        // (this would indicate SF is stuck, but we want to be able to
1497        // print something in dumpsys).
1498        int retry = 3;
1499        while (mStateLock.tryLock()<0 && --retry>=0) {
1500            usleep(1000000);
1501        }
1502        const bool locked(retry >= 0);
1503        if (!locked) {
1504            snprintf(buffer, SIZE,
1505                    "SurfaceFlinger appears to be unresponsive, "
1506                    "dumping anyways (no locks held)\n");
1507            result.append(buffer);
1508        }
1509
1510        bool dumpAll = true;
1511        size_t index = 0;
1512        size_t numArgs = args.size();
1513        if (numArgs) {
1514            dumpAll = false;
1515
1516            if ((index < numArgs) &&
1517                    (args[index] == String16("--list"))) {
1518                index++;
1519                listLayersLocked(args, index, result, buffer, SIZE);
1520            }
1521
1522            if ((index < numArgs) &&
1523                    (args[index] == String16("--latency"))) {
1524                index++;
1525                dumpStatsLocked(args, index, result, buffer, SIZE);
1526            }
1527
1528            if ((index < numArgs) &&
1529                    (args[index] == String16("--latency-clear"))) {
1530                index++;
1531                clearStatsLocked(args, index, result, buffer, SIZE);
1532            }
1533        }
1534
1535        if (dumpAll) {
1536            dumpAllLocked(result, buffer, SIZE);
1537        }
1538
1539        if (locked) {
1540            mStateLock.unlock();
1541        }
1542    }
1543    write(fd, result.string(), result.size());
1544    return NO_ERROR;
1545}
1546
1547void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1548        String8& result, char* buffer, size_t SIZE) const
1549{
1550    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1551    const size_t count = currentLayers.size();
1552    for (size_t i=0 ; i<count ; i++) {
1553        const sp<LayerBase>& layer(currentLayers[i]);
1554        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1555        result.append(buffer);
1556    }
1557}
1558
1559void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1560        String8& result, char* buffer, size_t SIZE) const
1561{
1562    String8 name;
1563    if (index < args.size()) {
1564        name = String8(args[index]);
1565        index++;
1566    }
1567
1568    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1569    const size_t count = currentLayers.size();
1570    for (size_t i=0 ; i<count ; i++) {
1571        const sp<LayerBase>& layer(currentLayers[i]);
1572        if (name.isEmpty()) {
1573            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1574            result.append(buffer);
1575        }
1576        if (name.isEmpty() || (name == layer->getName())) {
1577            layer->dumpStats(result, buffer, SIZE);
1578        }
1579    }
1580}
1581
1582void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1583        String8& result, char* buffer, size_t SIZE) const
1584{
1585    String8 name;
1586    if (index < args.size()) {
1587        name = String8(args[index]);
1588        index++;
1589    }
1590
1591    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1592    const size_t count = currentLayers.size();
1593    for (size_t i=0 ; i<count ; i++) {
1594        const sp<LayerBase>& layer(currentLayers[i]);
1595        if (name.isEmpty() || (name == layer->getName())) {
1596            layer->clearStats();
1597        }
1598    }
1599}
1600
1601void SurfaceFlinger::dumpAllLocked(
1602        String8& result, char* buffer, size_t SIZE) const
1603{
1604    // figure out if we're stuck somewhere
1605    const nsecs_t now = systemTime();
1606    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1607    const nsecs_t inTransaction(mDebugInTransaction);
1608    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1609    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1610
1611    /*
1612     * Dump the visible layer list
1613     */
1614    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1615    const size_t count = currentLayers.size();
1616    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1617    result.append(buffer);
1618    for (size_t i=0 ; i<count ; i++) {
1619        const sp<LayerBase>& layer(currentLayers[i]);
1620        layer->dump(result, buffer, SIZE);
1621    }
1622
1623    /*
1624     * Dump the layers in the purgatory
1625     */
1626
1627    const size_t purgatorySize = mLayerPurgatory.size();
1628    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1629    result.append(buffer);
1630    for (size_t i=0 ; i<purgatorySize ; i++) {
1631        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1632        layer->shortDump(result, buffer, SIZE);
1633    }
1634
1635    /*
1636     * Dump SurfaceFlinger global state
1637     */
1638
1639    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1640    result.append(buffer);
1641
1642    const GLExtensions& extensions(GLExtensions::getInstance());
1643    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1644            extensions.getVendor(),
1645            extensions.getRenderer(),
1646            extensions.getVersion());
1647    result.append(buffer);
1648
1649    snprintf(buffer, SIZE, "EGL : %s\n",
1650            eglQueryString(graphicPlane(0).getEGLDisplay(),
1651                    EGL_VERSION_HW_ANDROID));
1652    result.append(buffer);
1653
1654    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1655    result.append(buffer);
1656
1657    mWormholeRegion.dump(result, "WormholeRegion");
1658    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1659    snprintf(buffer, SIZE,
1660            "  orientation=%d, canDraw=%d\n",
1661            mCurrentState.orientation, hw.canDraw());
1662    result.append(buffer);
1663    snprintf(buffer, SIZE,
1664            "  last eglSwapBuffers() time: %f us\n"
1665            "  last transaction time     : %f us\n"
1666            "  transaction-flags         : %08x\n"
1667            "  refresh-rate              : %f fps\n"
1668            "  x-dpi                     : %f\n"
1669            "  y-dpi                     : %f\n",
1670            mLastSwapBufferTime/1000.0,
1671            mLastTransactionTime/1000.0,
1672            mTransactionFlags,
1673            hw.getRefreshRate(),
1674            hw.getDpiX(),
1675            hw.getDpiY());
1676    result.append(buffer);
1677
1678    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1679            inSwapBuffersDuration/1000.0);
1680    result.append(buffer);
1681
1682    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1683            inTransactionDuration/1000.0);
1684    result.append(buffer);
1685
1686    /*
1687     * VSYNC state
1688     */
1689    mEventThread->dump(result, buffer, SIZE);
1690
1691    /*
1692     * Dump HWComposer state
1693     */
1694    HWComposer& hwc(hw.getHwComposer());
1695    snprintf(buffer, SIZE, "h/w composer state:\n");
1696    result.append(buffer);
1697    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1698            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1699                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1700    result.append(buffer);
1701    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1702
1703    /*
1704     * Dump gralloc state
1705     */
1706    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1707    alloc.dump(result);
1708    hw.dump(result);
1709}
1710
1711status_t SurfaceFlinger::onTransact(
1712    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1713{
1714    switch (code) {
1715        case CREATE_CONNECTION:
1716        case SET_TRANSACTION_STATE:
1717        case SET_ORIENTATION:
1718        case BOOT_FINISHED:
1719        case TURN_ELECTRON_BEAM_OFF:
1720        case TURN_ELECTRON_BEAM_ON:
1721        {
1722            // codes that require permission check
1723            IPCThreadState* ipc = IPCThreadState::self();
1724            const int pid = ipc->getCallingPid();
1725            const int uid = ipc->getCallingUid();
1726            if ((uid != AID_GRAPHICS) &&
1727                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1728                ALOGE("Permission Denial: "
1729                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1730                return PERMISSION_DENIED;
1731            }
1732            break;
1733        }
1734        case CAPTURE_SCREEN:
1735        {
1736            // codes that require permission check
1737            IPCThreadState* ipc = IPCThreadState::self();
1738            const int pid = ipc->getCallingPid();
1739            const int uid = ipc->getCallingUid();
1740            if ((uid != AID_GRAPHICS) &&
1741                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1742                ALOGE("Permission Denial: "
1743                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1744                return PERMISSION_DENIED;
1745            }
1746            break;
1747        }
1748    }
1749
1750    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1751    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1752        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1753        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1754            IPCThreadState* ipc = IPCThreadState::self();
1755            const int pid = ipc->getCallingPid();
1756            const int uid = ipc->getCallingUid();
1757            ALOGE("Permission Denial: "
1758                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1759            return PERMISSION_DENIED;
1760        }
1761        int n;
1762        switch (code) {
1763            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1764            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1765                return NO_ERROR;
1766            case 1002:  // SHOW_UPDATES
1767                n = data.readInt32();
1768                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1769                invalidateHwcGeometry();
1770                repaintEverything();
1771                return NO_ERROR;
1772            case 1003:  // SHOW_BACKGROUND
1773                n = data.readInt32();
1774                mDebugBackground = n ? 1 : 0;
1775                return NO_ERROR;
1776            case 1004:{ // repaint everything
1777                repaintEverything();
1778                return NO_ERROR;
1779            }
1780            case 1005:{ // force transaction
1781                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1782                return NO_ERROR;
1783            }
1784            case 1006:{ // send empty update
1785                signalRefresh();
1786                return NO_ERROR;
1787            }
1788            case 1008:  // toggle use of hw composer
1789                n = data.readInt32();
1790                mDebugDisableHWC = n ? 1 : 0;
1791                invalidateHwcGeometry();
1792                repaintEverything();
1793                return NO_ERROR;
1794            case 1009:  // toggle use of transform hint
1795                n = data.readInt32();
1796                mDebugDisableTransformHint = n ? 1 : 0;
1797                invalidateHwcGeometry();
1798                repaintEverything();
1799                return NO_ERROR;
1800            case 1010:  // interrogate.
1801                reply->writeInt32(0);
1802                reply->writeInt32(0);
1803                reply->writeInt32(mDebugRegion);
1804                reply->writeInt32(mDebugBackground);
1805                reply->writeInt32(mDebugDisableHWC);
1806                return NO_ERROR;
1807            case 1013: {
1808                Mutex::Autolock _l(mStateLock);
1809                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1810                reply->writeInt32(hw.getPageFlipCount());
1811            }
1812            return NO_ERROR;
1813        }
1814    }
1815    return err;
1816}
1817
1818void SurfaceFlinger::repaintEverything() {
1819    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1820    const Rect bounds(hw.getBounds());
1821    setInvalidateRegion(Region(bounds));
1822    signalTransaction();
1823}
1824
1825void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1826    Mutex::Autolock _l(mInvalidateLock);
1827    mInvalidateRegion = reg;
1828}
1829
1830Region SurfaceFlinger::getAndClearInvalidateRegion() {
1831    Mutex::Autolock _l(mInvalidateLock);
1832    Region reg(mInvalidateRegion);
1833    mInvalidateRegion.clear();
1834    return reg;
1835}
1836
1837// ---------------------------------------------------------------------------
1838
1839status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1840        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1841{
1842    Mutex::Autolock _l(mStateLock);
1843    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1844}
1845
1846status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1847        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1848{
1849    if (!GLExtensions::getInstance().haveFramebufferObject())
1850        return INVALID_OPERATION;
1851
1852    // get screen geometry
1853    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1854    const uint32_t hw_w = hw.getWidth();
1855    const uint32_t hw_h = hw.getHeight();
1856    GLfloat u = 1;
1857    GLfloat v = 1;
1858
1859    // make sure to clear all GL error flags
1860    while ( glGetError() != GL_NO_ERROR ) ;
1861
1862    // create a FBO
1863    GLuint name, tname;
1864    glGenTextures(1, &tname);
1865    glBindTexture(GL_TEXTURE_2D, tname);
1866    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1867            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1868    if (glGetError() != GL_NO_ERROR) {
1869        while ( glGetError() != GL_NO_ERROR ) ;
1870        GLint tw = (2 << (31 - clz(hw_w)));
1871        GLint th = (2 << (31 - clz(hw_h)));
1872        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1873                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1874        u = GLfloat(hw_w) / tw;
1875        v = GLfloat(hw_h) / th;
1876    }
1877    glGenFramebuffersOES(1, &name);
1878    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1879    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1880            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1881
1882    // redraw the screen entirely...
1883    glDisable(GL_TEXTURE_EXTERNAL_OES);
1884    glDisable(GL_TEXTURE_2D);
1885    glDisable(GL_SCISSOR_TEST);
1886    glClearColor(0,0,0,1);
1887    glClear(GL_COLOR_BUFFER_BIT);
1888    glEnable(GL_SCISSOR_TEST);
1889    glMatrixMode(GL_MODELVIEW);
1890    glLoadIdentity();
1891    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1892    const size_t count = layers.size();
1893    for (size_t i=0 ; i<count ; ++i) {
1894        const sp<LayerBase>& layer(layers[i]);
1895        layer->drawForSreenShot();
1896    }
1897
1898    hw.compositionComplete();
1899
1900    // back to main framebuffer
1901    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1902    glDisable(GL_SCISSOR_TEST);
1903    glDeleteFramebuffersOES(1, &name);
1904
1905    *textureName = tname;
1906    *uOut = u;
1907    *vOut = v;
1908    return NO_ERROR;
1909}
1910
1911// ---------------------------------------------------------------------------
1912
1913status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1914{
1915    // get screen geometry
1916    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1917    const uint32_t hw_w = hw.getWidth();
1918    const uint32_t hw_h = hw.getHeight();
1919    const Region screenBounds(hw.getBounds());
1920
1921    GLfloat u, v;
1922    GLuint tname;
1923    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1924    if (result != NO_ERROR) {
1925        return result;
1926    }
1927
1928    GLfloat vtx[8];
1929    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1930    glBindTexture(GL_TEXTURE_2D, tname);
1931    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1932    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1933    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1934    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1935    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1936    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1937    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1938    glVertexPointer(2, GL_FLOAT, 0, vtx);
1939
1940    /*
1941     * Texture coordinate mapping
1942     *
1943     *                 u
1944     *    1 +----------+---+
1945     *      |     |    |   |  image is inverted
1946     *      |     V    |   |  w.r.t. the texture
1947     *  1-v +----------+   |  coordinates
1948     *      |              |
1949     *      |              |
1950     *      |              |
1951     *    0 +--------------+
1952     *      0              1
1953     *
1954     */
1955
1956    class s_curve_interpolator {
1957        const float nbFrames, s, v;
1958    public:
1959        s_curve_interpolator(int nbFrames, float s)
1960        : nbFrames(1.0f / (nbFrames-1)), s(s),
1961          v(1.0f + expf(-s + 0.5f*s)) {
1962        }
1963        float operator()(int f) {
1964            const float x = f * nbFrames;
1965            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1966        }
1967    };
1968
1969    class v_stretch {
1970        const GLfloat hw_w, hw_h;
1971    public:
1972        v_stretch(uint32_t hw_w, uint32_t hw_h)
1973        : hw_w(hw_w), hw_h(hw_h) {
1974        }
1975        void operator()(GLfloat* vtx, float v) {
1976            const GLfloat w = hw_w + (hw_w * v);
1977            const GLfloat h = hw_h - (hw_h * v);
1978            const GLfloat x = (hw_w - w) * 0.5f;
1979            const GLfloat y = (hw_h - h) * 0.5f;
1980            vtx[0] = x;         vtx[1] = y;
1981            vtx[2] = x;         vtx[3] = y + h;
1982            vtx[4] = x + w;     vtx[5] = y + h;
1983            vtx[6] = x + w;     vtx[7] = y;
1984        }
1985    };
1986
1987    class h_stretch {
1988        const GLfloat hw_w, hw_h;
1989    public:
1990        h_stretch(uint32_t hw_w, uint32_t hw_h)
1991        : hw_w(hw_w), hw_h(hw_h) {
1992        }
1993        void operator()(GLfloat* vtx, float v) {
1994            const GLfloat w = hw_w - (hw_w * v);
1995            const GLfloat h = 1.0f;
1996            const GLfloat x = (hw_w - w) * 0.5f;
1997            const GLfloat y = (hw_h - h) * 0.5f;
1998            vtx[0] = x;         vtx[1] = y;
1999            vtx[2] = x;         vtx[3] = y + h;
2000            vtx[4] = x + w;     vtx[5] = y + h;
2001            vtx[6] = x + w;     vtx[7] = y;
2002        }
2003    };
2004
2005    // the full animation is 24 frames
2006    char value[PROPERTY_VALUE_MAX];
2007    property_get("debug.sf.electron_frames", value, "24");
2008    int nbFrames = (atoi(value) + 1) >> 1;
2009    if (nbFrames <= 0) // just in case
2010        nbFrames = 24;
2011
2012    s_curve_interpolator itr(nbFrames, 7.5f);
2013    s_curve_interpolator itg(nbFrames, 8.0f);
2014    s_curve_interpolator itb(nbFrames, 8.5f);
2015
2016    v_stretch vverts(hw_w, hw_h);
2017
2018    glMatrixMode(GL_TEXTURE);
2019    glLoadIdentity();
2020    glMatrixMode(GL_MODELVIEW);
2021    glLoadIdentity();
2022
2023    glEnable(GL_BLEND);
2024    glBlendFunc(GL_ONE, GL_ONE);
2025    for (int i=0 ; i<nbFrames ; i++) {
2026        float x, y, w, h;
2027        const float vr = itr(i);
2028        const float vg = itg(i);
2029        const float vb = itb(i);
2030
2031        // clear screen
2032        glColorMask(1,1,1,1);
2033        glClear(GL_COLOR_BUFFER_BIT);
2034        glEnable(GL_TEXTURE_2D);
2035
2036        // draw the red plane
2037        vverts(vtx, vr);
2038        glColorMask(1,0,0,1);
2039        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2040
2041        // draw the green plane
2042        vverts(vtx, vg);
2043        glColorMask(0,1,0,1);
2044        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2045
2046        // draw the blue plane
2047        vverts(vtx, vb);
2048        glColorMask(0,0,1,1);
2049        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2050
2051        // draw the white highlight (we use the last vertices)
2052        glDisable(GL_TEXTURE_2D);
2053        glColorMask(1,1,1,1);
2054        glColor4f(vg, vg, vg, 1);
2055        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2056        hw.flip(screenBounds);
2057    }
2058
2059    h_stretch hverts(hw_w, hw_h);
2060    glDisable(GL_BLEND);
2061    glDisable(GL_TEXTURE_2D);
2062    glColorMask(1,1,1,1);
2063    for (int i=0 ; i<nbFrames ; i++) {
2064        const float v = itg(i);
2065        hverts(vtx, v);
2066        glClear(GL_COLOR_BUFFER_BIT);
2067        glColor4f(1-v, 1-v, 1-v, 1);
2068        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2069        hw.flip(screenBounds);
2070    }
2071
2072    glColorMask(1,1,1,1);
2073    glEnable(GL_SCISSOR_TEST);
2074    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2075    glDeleteTextures(1, &tname);
2076    glDisable(GL_TEXTURE_2D);
2077    glDisable(GL_BLEND);
2078    return NO_ERROR;
2079}
2080
2081status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2082{
2083    status_t result = PERMISSION_DENIED;
2084
2085    if (!GLExtensions::getInstance().haveFramebufferObject())
2086        return INVALID_OPERATION;
2087
2088
2089    // get screen geometry
2090    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2091    const uint32_t hw_w = hw.getWidth();
2092    const uint32_t hw_h = hw.getHeight();
2093    const Region screenBounds(hw.bounds());
2094
2095    GLfloat u, v;
2096    GLuint tname;
2097    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2098    if (result != NO_ERROR) {
2099        return result;
2100    }
2101
2102    GLfloat vtx[8];
2103    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2104    glBindTexture(GL_TEXTURE_2D, tname);
2105    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2106    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2107    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2108    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2109    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2110    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2111    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2112    glVertexPointer(2, GL_FLOAT, 0, vtx);
2113
2114    class s_curve_interpolator {
2115        const float nbFrames, s, v;
2116    public:
2117        s_curve_interpolator(int nbFrames, float s)
2118        : nbFrames(1.0f / (nbFrames-1)), s(s),
2119          v(1.0f + expf(-s + 0.5f*s)) {
2120        }
2121        float operator()(int f) {
2122            const float x = f * nbFrames;
2123            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2124        }
2125    };
2126
2127    class v_stretch {
2128        const GLfloat hw_w, hw_h;
2129    public:
2130        v_stretch(uint32_t hw_w, uint32_t hw_h)
2131        : hw_w(hw_w), hw_h(hw_h) {
2132        }
2133        void operator()(GLfloat* vtx, float v) {
2134            const GLfloat w = hw_w + (hw_w * v);
2135            const GLfloat h = hw_h - (hw_h * v);
2136            const GLfloat x = (hw_w - w) * 0.5f;
2137            const GLfloat y = (hw_h - h) * 0.5f;
2138            vtx[0] = x;         vtx[1] = y;
2139            vtx[2] = x;         vtx[3] = y + h;
2140            vtx[4] = x + w;     vtx[5] = y + h;
2141            vtx[6] = x + w;     vtx[7] = y;
2142        }
2143    };
2144
2145    class h_stretch {
2146        const GLfloat hw_w, hw_h;
2147    public:
2148        h_stretch(uint32_t hw_w, uint32_t hw_h)
2149        : hw_w(hw_w), hw_h(hw_h) {
2150        }
2151        void operator()(GLfloat* vtx, float v) {
2152            const GLfloat w = hw_w - (hw_w * v);
2153            const GLfloat h = 1.0f;
2154            const GLfloat x = (hw_w - w) * 0.5f;
2155            const GLfloat y = (hw_h - h) * 0.5f;
2156            vtx[0] = x;         vtx[1] = y;
2157            vtx[2] = x;         vtx[3] = y + h;
2158            vtx[4] = x + w;     vtx[5] = y + h;
2159            vtx[6] = x + w;     vtx[7] = y;
2160        }
2161    };
2162
2163    // the full animation is 12 frames
2164    int nbFrames = 8;
2165    s_curve_interpolator itr(nbFrames, 7.5f);
2166    s_curve_interpolator itg(nbFrames, 8.0f);
2167    s_curve_interpolator itb(nbFrames, 8.5f);
2168
2169    h_stretch hverts(hw_w, hw_h);
2170    glDisable(GL_BLEND);
2171    glDisable(GL_TEXTURE_2D);
2172    glColorMask(1,1,1,1);
2173    for (int i=nbFrames-1 ; i>=0 ; i--) {
2174        const float v = itg(i);
2175        hverts(vtx, v);
2176        glClear(GL_COLOR_BUFFER_BIT);
2177        glColor4f(1-v, 1-v, 1-v, 1);
2178        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2179        hw.flip(screenBounds);
2180    }
2181
2182    nbFrames = 4;
2183    v_stretch vverts(hw_w, hw_h);
2184    glEnable(GL_BLEND);
2185    glBlendFunc(GL_ONE, GL_ONE);
2186    for (int i=nbFrames-1 ; i>=0 ; i--) {
2187        float x, y, w, h;
2188        const float vr = itr(i);
2189        const float vg = itg(i);
2190        const float vb = itb(i);
2191
2192        // clear screen
2193        glColorMask(1,1,1,1);
2194        glClear(GL_COLOR_BUFFER_BIT);
2195        glEnable(GL_TEXTURE_2D);
2196
2197        // draw the red plane
2198        vverts(vtx, vr);
2199        glColorMask(1,0,0,1);
2200        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2201
2202        // draw the green plane
2203        vverts(vtx, vg);
2204        glColorMask(0,1,0,1);
2205        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2206
2207        // draw the blue plane
2208        vverts(vtx, vb);
2209        glColorMask(0,0,1,1);
2210        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2211
2212        hw.flip(screenBounds);
2213    }
2214
2215    glColorMask(1,1,1,1);
2216    glEnable(GL_SCISSOR_TEST);
2217    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2218    glDeleteTextures(1, &tname);
2219    glDisable(GL_TEXTURE_2D);
2220    glDisable(GL_BLEND);
2221
2222    return NO_ERROR;
2223}
2224
2225// ---------------------------------------------------------------------------
2226
2227status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2228{
2229    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2230    if (!hw.canDraw()) {
2231        // we're already off
2232        return NO_ERROR;
2233    }
2234
2235    // turn off hwc while we're doing the animation
2236    hw.getHwComposer().disable();
2237    // and make sure to turn it back on (if needed) next time we compose
2238    invalidateHwcGeometry();
2239
2240    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2241        electronBeamOffAnimationImplLocked();
2242    }
2243
2244    // always clear the whole screen at the end of the animation
2245    glClearColor(0,0,0,1);
2246    glDisable(GL_SCISSOR_TEST);
2247    glClear(GL_COLOR_BUFFER_BIT);
2248    glEnable(GL_SCISSOR_TEST);
2249    hw.flip( Region(hw.bounds()) );
2250
2251    return NO_ERROR;
2252}
2253
2254status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2255{
2256    class MessageTurnElectronBeamOff : public MessageBase {
2257        SurfaceFlinger* flinger;
2258        int32_t mode;
2259        status_t result;
2260    public:
2261        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2262            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2263        }
2264        status_t getResult() const {
2265            return result;
2266        }
2267        virtual bool handler() {
2268            Mutex::Autolock _l(flinger->mStateLock);
2269            result = flinger->turnElectronBeamOffImplLocked(mode);
2270            return true;
2271        }
2272    };
2273
2274    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2275    status_t res = postMessageSync(msg);
2276    if (res == NO_ERROR) {
2277        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2278
2279        // work-around: when the power-manager calls us we activate the
2280        // animation. eventually, the "on" animation will be called
2281        // by the power-manager itself
2282        mElectronBeamAnimationMode = mode;
2283    }
2284    return res;
2285}
2286
2287// ---------------------------------------------------------------------------
2288
2289status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2290{
2291    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2292    if (hw.canDraw()) {
2293        // we're already on
2294        return NO_ERROR;
2295    }
2296    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2297        electronBeamOnAnimationImplLocked();
2298    }
2299
2300    // make sure to redraw the whole screen when the animation is done
2301    mDirtyRegion.set(hw.bounds());
2302    signalTransaction();
2303
2304    return NO_ERROR;
2305}
2306
2307status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2308{
2309    class MessageTurnElectronBeamOn : public MessageBase {
2310        SurfaceFlinger* flinger;
2311        int32_t mode;
2312        status_t result;
2313    public:
2314        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2315            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2316        }
2317        status_t getResult() const {
2318            return result;
2319        }
2320        virtual bool handler() {
2321            Mutex::Autolock _l(flinger->mStateLock);
2322            result = flinger->turnElectronBeamOnImplLocked(mode);
2323            return true;
2324        }
2325    };
2326
2327    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2328    return NO_ERROR;
2329}
2330
2331// ---------------------------------------------------------------------------
2332
2333status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2334        sp<IMemoryHeap>* heap,
2335        uint32_t* w, uint32_t* h, PixelFormat* f,
2336        uint32_t sw, uint32_t sh,
2337        uint32_t minLayerZ, uint32_t maxLayerZ)
2338{
2339    status_t result = PERMISSION_DENIED;
2340
2341    // only one display supported for now
2342    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2343        return BAD_VALUE;
2344
2345    if (!GLExtensions::getInstance().haveFramebufferObject())
2346        return INVALID_OPERATION;
2347
2348    // get screen geometry
2349    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2350    const uint32_t hw_w = hw.getWidth();
2351    const uint32_t hw_h = hw.getHeight();
2352
2353    if ((sw > hw_w) || (sh > hw_h))
2354        return BAD_VALUE;
2355
2356    sw = (!sw) ? hw_w : sw;
2357    sh = (!sh) ? hw_h : sh;
2358    const size_t size = sw * sh * 4;
2359
2360    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2361    //        sw, sh, minLayerZ, maxLayerZ);
2362
2363    // make sure to clear all GL error flags
2364    while ( glGetError() != GL_NO_ERROR ) ;
2365
2366    // create a FBO
2367    GLuint name, tname;
2368    glGenRenderbuffersOES(1, &tname);
2369    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2370    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2371    glGenFramebuffersOES(1, &name);
2372    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2373    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2374            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2375
2376    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2377
2378    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2379
2380        // invert everything, b/c glReadPixel() below will invert the FB
2381        glViewport(0, 0, sw, sh);
2382        glScissor(0, 0, sw, sh);
2383        glEnable(GL_SCISSOR_TEST);
2384        glMatrixMode(GL_PROJECTION);
2385        glPushMatrix();
2386        glLoadIdentity();
2387        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2388        glMatrixMode(GL_MODELVIEW);
2389
2390        // redraw the screen entirely...
2391        glClearColor(0,0,0,1);
2392        glClear(GL_COLOR_BUFFER_BIT);
2393
2394        const LayerVector& layers(mDrawingState.layersSortedByZ);
2395        const size_t count = layers.size();
2396        for (size_t i=0 ; i<count ; ++i) {
2397            const sp<LayerBase>& layer(layers[i]);
2398            const uint32_t flags = layer->drawingState().flags;
2399            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2400                const uint32_t z = layer->drawingState().z;
2401                if (z >= minLayerZ && z <= maxLayerZ) {
2402                    layer->drawForSreenShot();
2403                }
2404            }
2405        }
2406
2407        // XXX: this is needed on tegra
2408        glEnable(GL_SCISSOR_TEST);
2409        glScissor(0, 0, sw, sh);
2410
2411        // check for errors and return screen capture
2412        if (glGetError() != GL_NO_ERROR) {
2413            // error while rendering
2414            result = INVALID_OPERATION;
2415        } else {
2416            // allocate shared memory large enough to hold the
2417            // screen capture
2418            sp<MemoryHeapBase> base(
2419                    new MemoryHeapBase(size, 0, "screen-capture") );
2420            void* const ptr = base->getBase();
2421            if (ptr) {
2422                // capture the screen with glReadPixels()
2423                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2424                if (glGetError() == GL_NO_ERROR) {
2425                    *heap = base;
2426                    *w = sw;
2427                    *h = sh;
2428                    *f = PIXEL_FORMAT_RGBA_8888;
2429                    result = NO_ERROR;
2430                }
2431            } else {
2432                result = NO_MEMORY;
2433            }
2434        }
2435        glEnable(GL_SCISSOR_TEST);
2436        glViewport(0, 0, hw_w, hw_h);
2437        glMatrixMode(GL_PROJECTION);
2438        glPopMatrix();
2439        glMatrixMode(GL_MODELVIEW);
2440    } else {
2441        result = BAD_VALUE;
2442    }
2443
2444    // release FBO resources
2445    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2446    glDeleteRenderbuffersOES(1, &tname);
2447    glDeleteFramebuffersOES(1, &name);
2448
2449    hw.compositionComplete();
2450
2451    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2452
2453    return result;
2454}
2455
2456
2457status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2458        sp<IMemoryHeap>* heap,
2459        uint32_t* width, uint32_t* height, PixelFormat* format,
2460        uint32_t sw, uint32_t sh,
2461        uint32_t minLayerZ, uint32_t maxLayerZ)
2462{
2463    // only one display supported for now
2464    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2465        return BAD_VALUE;
2466
2467    if (!GLExtensions::getInstance().haveFramebufferObject())
2468        return INVALID_OPERATION;
2469
2470    class MessageCaptureScreen : public MessageBase {
2471        SurfaceFlinger* flinger;
2472        DisplayID dpy;
2473        sp<IMemoryHeap>* heap;
2474        uint32_t* w;
2475        uint32_t* h;
2476        PixelFormat* f;
2477        uint32_t sw;
2478        uint32_t sh;
2479        uint32_t minLayerZ;
2480        uint32_t maxLayerZ;
2481        status_t result;
2482    public:
2483        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2484                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2485                uint32_t sw, uint32_t sh,
2486                uint32_t minLayerZ, uint32_t maxLayerZ)
2487            : flinger(flinger), dpy(dpy),
2488              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2489              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2490              result(PERMISSION_DENIED)
2491        {
2492        }
2493        status_t getResult() const {
2494            return result;
2495        }
2496        virtual bool handler() {
2497            Mutex::Autolock _l(flinger->mStateLock);
2498
2499            // if we have secure windows, never allow the screen capture
2500            if (flinger->mSecureFrameBuffer)
2501                return true;
2502
2503            result = flinger->captureScreenImplLocked(dpy,
2504                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2505
2506            return true;
2507        }
2508    };
2509
2510    sp<MessageBase> msg = new MessageCaptureScreen(this,
2511            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2512    status_t res = postMessageSync(msg);
2513    if (res == NO_ERROR) {
2514        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2515    }
2516    return res;
2517}
2518
2519// ---------------------------------------------------------------------------
2520
2521sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2522{
2523    sp<Layer> result;
2524    Mutex::Autolock _l(mStateLock);
2525    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2526    return result;
2527}
2528
2529// ---------------------------------------------------------------------------
2530
2531Client::Client(const sp<SurfaceFlinger>& flinger)
2532    : mFlinger(flinger), mNameGenerator(1)
2533{
2534}
2535
2536Client::~Client()
2537{
2538    const size_t count = mLayers.size();
2539    for (size_t i=0 ; i<count ; i++) {
2540        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2541        if (layer != 0) {
2542            mFlinger->removeLayer(layer);
2543        }
2544    }
2545}
2546
2547status_t Client::initCheck() const {
2548    return NO_ERROR;
2549}
2550
2551size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2552{
2553    Mutex::Autolock _l(mLock);
2554    size_t name = mNameGenerator++;
2555    mLayers.add(name, layer);
2556    return name;
2557}
2558
2559void Client::detachLayer(const LayerBaseClient* layer)
2560{
2561    Mutex::Autolock _l(mLock);
2562    // we do a linear search here, because this doesn't happen often
2563    const size_t count = mLayers.size();
2564    for (size_t i=0 ; i<count ; i++) {
2565        if (mLayers.valueAt(i) == layer) {
2566            mLayers.removeItemsAt(i, 1);
2567            break;
2568        }
2569    }
2570}
2571sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2572{
2573    Mutex::Autolock _l(mLock);
2574    sp<LayerBaseClient> lbc;
2575    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2576    if (layer != 0) {
2577        lbc = layer.promote();
2578        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2579    }
2580    return lbc;
2581}
2582
2583
2584status_t Client::onTransact(
2585    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2586{
2587    // these must be checked
2588     IPCThreadState* ipc = IPCThreadState::self();
2589     const int pid = ipc->getCallingPid();
2590     const int uid = ipc->getCallingUid();
2591     const int self_pid = getpid();
2592     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2593         // we're called from a different process, do the real check
2594         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2595         {
2596             ALOGE("Permission Denial: "
2597                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2598             return PERMISSION_DENIED;
2599         }
2600     }
2601     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2602}
2603
2604
2605sp<ISurface> Client::createSurface(
2606        ISurfaceComposerClient::surface_data_t* params,
2607        const String8& name,
2608        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2609        uint32_t flags)
2610{
2611    /*
2612     * createSurface must be called from the GL thread so that it can
2613     * have access to the GL context.
2614     */
2615
2616    class MessageCreateSurface : public MessageBase {
2617        sp<ISurface> result;
2618        SurfaceFlinger* flinger;
2619        ISurfaceComposerClient::surface_data_t* params;
2620        Client* client;
2621        const String8& name;
2622        DisplayID display;
2623        uint32_t w, h;
2624        PixelFormat format;
2625        uint32_t flags;
2626    public:
2627        MessageCreateSurface(SurfaceFlinger* flinger,
2628                ISurfaceComposerClient::surface_data_t* params,
2629                const String8& name, Client* client,
2630                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2631                uint32_t flags)
2632            : flinger(flinger), params(params), client(client), name(name),
2633              display(display), w(w), h(h), format(format), flags(flags)
2634        {
2635        }
2636        sp<ISurface> getResult() const { return result; }
2637        virtual bool handler() {
2638            result = flinger->createSurface(params, name, client,
2639                    display, w, h, format, flags);
2640            return true;
2641        }
2642    };
2643
2644    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2645            params, name, this, display, w, h, format, flags);
2646    mFlinger->postMessageSync(msg);
2647    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2648}
2649status_t Client::destroySurface(SurfaceID sid) {
2650    return mFlinger->removeSurface(this, sid);
2651}
2652
2653// ---------------------------------------------------------------------------
2654
2655GraphicBufferAlloc::GraphicBufferAlloc() {}
2656
2657GraphicBufferAlloc::~GraphicBufferAlloc() {}
2658
2659sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2660        PixelFormat format, uint32_t usage, status_t* error) {
2661    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2662    status_t err = graphicBuffer->initCheck();
2663    *error = err;
2664    if (err != 0 || graphicBuffer->handle == 0) {
2665        if (err == NO_MEMORY) {
2666            GraphicBuffer::dumpAllocationsToSystemLog();
2667        }
2668        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2669             "failed (%s), handle=%p",
2670                w, h, strerror(-err), graphicBuffer->handle);
2671        return 0;
2672    }
2673    return graphicBuffer;
2674}
2675
2676// ---------------------------------------------------------------------------
2677
2678GraphicPlane::GraphicPlane()
2679    : mHw(0)
2680{
2681}
2682
2683GraphicPlane::~GraphicPlane() {
2684    delete mHw;
2685}
2686
2687bool GraphicPlane::initialized() const {
2688    return mHw ? true : false;
2689}
2690
2691int GraphicPlane::getWidth() const {
2692    return mWidth;
2693}
2694
2695int GraphicPlane::getHeight() const {
2696    return mHeight;
2697}
2698
2699void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2700{
2701    mHw = hw;
2702
2703    // initialize the display orientation transform.
2704    // it's a constant that should come from the display driver.
2705    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2706    char property[PROPERTY_VALUE_MAX];
2707    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2708        //displayOrientation
2709        switch (atoi(property)) {
2710        case 90:
2711            displayOrientation = ISurfaceComposer::eOrientation90;
2712            break;
2713        case 270:
2714            displayOrientation = ISurfaceComposer::eOrientation270;
2715            break;
2716        }
2717    }
2718
2719    const float w = hw->getWidth();
2720    const float h = hw->getHeight();
2721    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2722            &mDisplayTransform);
2723    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2724        mDisplayWidth = h;
2725        mDisplayHeight = w;
2726    } else {
2727        mDisplayWidth = w;
2728        mDisplayHeight = h;
2729    }
2730
2731    setOrientation(ISurfaceComposer::eOrientationDefault);
2732}
2733
2734status_t GraphicPlane::orientationToTransfrom(
2735        int orientation, int w, int h, Transform* tr)
2736{
2737    uint32_t flags = 0;
2738    switch (orientation) {
2739    case ISurfaceComposer::eOrientationDefault:
2740        flags = Transform::ROT_0;
2741        break;
2742    case ISurfaceComposer::eOrientation90:
2743        flags = Transform::ROT_90;
2744        break;
2745    case ISurfaceComposer::eOrientation180:
2746        flags = Transform::ROT_180;
2747        break;
2748    case ISurfaceComposer::eOrientation270:
2749        flags = Transform::ROT_270;
2750        break;
2751    default:
2752        return BAD_VALUE;
2753    }
2754    tr->set(flags, w, h);
2755    return NO_ERROR;
2756}
2757
2758status_t GraphicPlane::setOrientation(int orientation)
2759{
2760    // If the rotation can be handled in hardware, this is where
2761    // the magic should happen.
2762
2763    const DisplayHardware& hw(displayHardware());
2764    const float w = mDisplayWidth;
2765    const float h = mDisplayHeight;
2766    mWidth = int(w);
2767    mHeight = int(h);
2768
2769    Transform orientationTransform;
2770    GraphicPlane::orientationToTransfrom(orientation, w, h,
2771            &orientationTransform);
2772    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2773        mWidth = int(h);
2774        mHeight = int(w);
2775    }
2776
2777    mOrientation = orientation;
2778    mGlobalTransform = mDisplayTransform * orientationTransform;
2779    return NO_ERROR;
2780}
2781
2782const DisplayHardware& GraphicPlane::displayHardware() const {
2783    return *mHw;
2784}
2785
2786DisplayHardware& GraphicPlane::editDisplayHardware() {
2787    return *mHw;
2788}
2789
2790const Transform& GraphicPlane::transform() const {
2791    return mGlobalTransform;
2792}
2793
2794EGLDisplay GraphicPlane::getEGLDisplay() const {
2795    return mHw->getEGLDisplay();
2796}
2797
2798// ---------------------------------------------------------------------------
2799
2800}; // namespace android
2801