SurfaceFlinger.cpp revision 303d538bb012e82c6b9a98c4930a03455000f761 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35#include <binder/PermissionCache.h>
36
37#include <gui/IDisplayEventConnection.h>
38
39#include <utils/String8.h>
40#include <utils/String16.h>
41#include <utils/StopWatch.h>
42
43#include <ui/GraphicBufferAllocator.h>
44#include <ui/PixelFormat.h>
45
46#include <pixelflinger/pixelflinger.h>
47#include <GLES/gl.h>
48
49#include "clz.h"
50#include "DisplayEventConnection.h"
51#include "EventThread.h"
52#include "GLExtensions.h"
53#include "DdmConnection.h"
54#include "Layer.h"
55#include "LayerDim.h"
56#include "LayerScreenshot.h"
57#include "SurfaceFlinger.h"
58
59#include "DisplayHardware/DisplayHardware.h"
60#include "DisplayHardware/HWComposer.h"
61
62#include <private/android_filesystem_config.h>
63#include <private/surfaceflinger/SharedBufferStack.h>
64
65#define EGL_VERSION_HW_ANDROID  0x3143
66
67#define DISPLAY_COUNT       1
68
69namespace android {
70// ---------------------------------------------------------------------------
71
72const String16 sHardwareTest("android.permission.HARDWARE_TEST");
73const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
74const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
75const String16 sDump("android.permission.DUMP");
76
77// ---------------------------------------------------------------------------
78
79SurfaceFlinger::SurfaceFlinger()
80    :   BnSurfaceComposer(), Thread(false),
81        mTransactionFlags(0),
82        mTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mElectronBeamAnimationMode(0),
88        mDebugRegion(0),
89        mDebugBackground(0),
90        mDebugDDMS(0),
91        mDebugDisableHWC(0),
92        mDebugDisableTransformHint(0),
93        mDebugInSwapBuffers(0),
94        mLastSwapBufferTime(0),
95        mDebugInTransaction(0),
96        mLastTransactionTime(0),
97        mBootFinished(false),
98        mConsoleSignals(0),
99        mSecureFrameBuffer(0)
100{
101    init();
102}
103
104void SurfaceFlinger::init()
105{
106    ALOGI("SurfaceFlinger is starting");
107
108    // debugging stuff...
109    char value[PROPERTY_VALUE_MAX];
110
111    property_get("debug.sf.showupdates", value, "0");
112    mDebugRegion = atoi(value);
113
114    property_get("debug.sf.showbackground", value, "0");
115    mDebugBackground = atoi(value);
116
117    property_get("debug.sf.ddms", value, "0");
118    mDebugDDMS = atoi(value);
119    if (mDebugDDMS) {
120        DdmConnection::start(getServiceName());
121    }
122
123    ALOGI_IF(mDebugRegion,       "showupdates enabled");
124    ALOGI_IF(mDebugBackground,   "showbackground enabled");
125    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
126}
127
128void SurfaceFlinger::onFirstRef()
129{
130    mEventQueue.init(this);
131
132    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
133
134    // Wait for the main thread to be done with its initialization
135    mReadyToRunBarrier.wait();
136}
137
138
139SurfaceFlinger::~SurfaceFlinger()
140{
141    glDeleteTextures(1, &mWormholeTexName);
142}
143
144void SurfaceFlinger::binderDied(const wp<IBinder>& who)
145{
146    // the window manager died on us. prepare its eulogy.
147
148    // reset screen orientation
149    Vector<ComposerState> state;
150    setTransactionState(state, eOrientationDefault, 0);
151
152    // restart the boot-animation
153    property_set("ctl.start", "bootanim");
154}
155
156sp<IMemoryHeap> SurfaceFlinger::getCblk() const
157{
158    return mServerHeap;
159}
160
161sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
162{
163    sp<ISurfaceComposerClient> bclient;
164    sp<Client> client(new Client(this));
165    status_t err = client->initCheck();
166    if (err == NO_ERROR) {
167        bclient = client;
168    }
169    return bclient;
170}
171
172sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
173{
174    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
175    return gba;
176}
177
178const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
179{
180    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
181    const GraphicPlane& plane(mGraphicPlanes[dpy]);
182    return plane;
183}
184
185GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
186{
187    return const_cast<GraphicPlane&>(
188        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
189}
190
191void SurfaceFlinger::bootFinished()
192{
193    const nsecs_t now = systemTime();
194    const nsecs_t duration = now - mBootTime;
195    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
196    mBootFinished = true;
197
198    // wait patiently for the window manager death
199    const String16 name("window");
200    sp<IBinder> window(defaultServiceManager()->getService(name));
201    if (window != 0) {
202        window->linkToDeath(this);
203    }
204
205    // stop boot animation
206    property_set("ctl.stop", "bootanim");
207}
208
209static inline uint16_t pack565(int r, int g, int b) {
210    return (r<<11)|(g<<5)|b;
211}
212
213status_t SurfaceFlinger::readyToRun()
214{
215    ALOGI(   "SurfaceFlinger's main thread ready to run. "
216            "Initializing graphics H/W...");
217
218    // we only support one display currently
219    int dpy = 0;
220
221    {
222        // initialize the main display
223        GraphicPlane& plane(graphicPlane(dpy));
224        DisplayHardware* const hw = new DisplayHardware(this, dpy);
225        plane.setDisplayHardware(hw);
226    }
227
228    // create the shared control-block
229    mServerHeap = new MemoryHeapBase(4096,
230            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
231    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
232
233    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
234    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
235
236    new(mServerCblk) surface_flinger_cblk_t;
237
238    // initialize primary screen
239    // (other display should be initialized in the same manner, but
240    // asynchronously, as they could come and go. None of this is supported
241    // yet).
242    const GraphicPlane& plane(graphicPlane(dpy));
243    const DisplayHardware& hw = plane.displayHardware();
244    const uint32_t w = hw.getWidth();
245    const uint32_t h = hw.getHeight();
246    const uint32_t f = hw.getFormat();
247    hw.makeCurrent();
248
249    // initialize the shared control block
250    mServerCblk->connected |= 1<<dpy;
251    display_cblk_t* dcblk = mServerCblk->displays + dpy;
252    memset(dcblk, 0, sizeof(display_cblk_t));
253    dcblk->w            = plane.getWidth();
254    dcblk->h            = plane.getHeight();
255    dcblk->format       = f;
256    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
257    dcblk->xdpi         = hw.getDpiX();
258    dcblk->ydpi         = hw.getDpiY();
259    dcblk->fps          = hw.getRefreshRate();
260    dcblk->density      = hw.getDensity();
261
262    // Initialize OpenGL|ES
263    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
264    glPixelStorei(GL_PACK_ALIGNMENT, 4);
265    glEnableClientState(GL_VERTEX_ARRAY);
266    glEnable(GL_SCISSOR_TEST);
267    glShadeModel(GL_FLAT);
268    glDisable(GL_DITHER);
269    glDisable(GL_CULL_FACE);
270
271    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
272    const uint16_t g1 = pack565(0x17,0x2f,0x17);
273    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
274    glGenTextures(1, &mWormholeTexName);
275    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
276    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
277    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
278    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
280    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
281            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
282
283    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
284    glGenTextures(1, &mProtectedTexName);
285    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
286    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
287    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
288    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
290    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
291            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
292
293    glViewport(0, 0, w, h);
294    glMatrixMode(GL_PROJECTION);
295    glLoadIdentity();
296    // put the origin in the left-bottom corner
297    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
298
299
300    // start the EventThread
301    mEventThread = new EventThread(this);
302    mEventQueue.setEventThread(mEventThread);
303
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    /*
1003     * and then, render the layers targeted at the framebuffer
1004     */
1005    hwc_layer_t* const cur(hwc.getLayers());
1006    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1007    size_t count = layers.size();
1008    for (size_t i=0 ; i<count ; i++) {
1009        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1010            continue;
1011        }
1012        const sp<LayerBase>& layer(layers[i]);
1013        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1014        if (!clip.isEmpty()) {
1015            layer->draw(clip);
1016        }
1017    }
1018}
1019
1020void SurfaceFlinger::debugFlashRegions()
1021{
1022    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1023    const uint32_t flags = hw.getFlags();
1024    const int32_t height = hw.getHeight();
1025    if (mSwapRegion.isEmpty()) {
1026        return;
1027    }
1028
1029    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1030            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1031        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1032                mDirtyRegion.bounds() : hw.bounds());
1033        composeSurfaces(repaint);
1034    }
1035
1036    glDisable(GL_TEXTURE_EXTERNAL_OES);
1037    glDisable(GL_TEXTURE_2D);
1038    glDisable(GL_BLEND);
1039    glDisable(GL_SCISSOR_TEST);
1040
1041    static int toggle = 0;
1042    toggle = 1 - toggle;
1043    if (toggle) {
1044        glColor4f(1, 0, 1, 1);
1045    } else {
1046        glColor4f(1, 1, 0, 1);
1047    }
1048
1049    Region::const_iterator it = mDirtyRegion.begin();
1050    Region::const_iterator const end = mDirtyRegion.end();
1051    while (it != end) {
1052        const Rect& r = *it++;
1053        GLfloat vertices[][2] = {
1054                { r.left,  height - r.top },
1055                { r.left,  height - r.bottom },
1056                { r.right, height - r.bottom },
1057                { r.right, height - r.top }
1058        };
1059        glVertexPointer(2, GL_FLOAT, 0, vertices);
1060        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1061    }
1062
1063    hw.flip(mSwapRegion);
1064
1065    if (mDebugRegion > 1)
1066        usleep(mDebugRegion * 1000);
1067
1068    glEnable(GL_SCISSOR_TEST);
1069}
1070
1071void SurfaceFlinger::drawWormhole() const
1072{
1073    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1074    if (region.isEmpty())
1075        return;
1076
1077    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1078    const int32_t width = hw.getWidth();
1079    const int32_t height = hw.getHeight();
1080
1081    if (CC_LIKELY(!mDebugBackground)) {
1082        glClearColor(0,0,0,0);
1083        Region::const_iterator it = region.begin();
1084        Region::const_iterator const end = region.end();
1085        while (it != end) {
1086            const Rect& r = *it++;
1087            const GLint sy = height - (r.top + r.height());
1088            glScissor(r.left, sy, r.width(), r.height());
1089            glClear(GL_COLOR_BUFFER_BIT);
1090        }
1091    } else {
1092        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1093                { width, height }, { 0, height }  };
1094        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1095
1096        glVertexPointer(2, GL_SHORT, 0, vertices);
1097        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1098        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1099
1100        glDisable(GL_TEXTURE_EXTERNAL_OES);
1101        glEnable(GL_TEXTURE_2D);
1102        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1103        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1104        glMatrixMode(GL_TEXTURE);
1105        glLoadIdentity();
1106
1107        glDisable(GL_BLEND);
1108
1109        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1110        Region::const_iterator it = region.begin();
1111        Region::const_iterator const end = region.end();
1112        while (it != end) {
1113            const Rect& r = *it++;
1114            const GLint sy = height - (r.top + r.height());
1115            glScissor(r.left, sy, r.width(), r.height());
1116            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1117        }
1118        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1119        glDisable(GL_TEXTURE_2D);
1120        glLoadIdentity();
1121        glMatrixMode(GL_MODELVIEW);
1122    }
1123}
1124
1125status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1126{
1127    Mutex::Autolock _l(mStateLock);
1128    addLayer_l(layer);
1129    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1130    return NO_ERROR;
1131}
1132
1133status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1134{
1135    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1136    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1137}
1138
1139ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1140        const sp<LayerBaseClient>& lbc)
1141{
1142    // attach this layer to the client
1143    size_t name = client->attachLayer(lbc);
1144
1145    Mutex::Autolock _l(mStateLock);
1146
1147    // add this layer to the current state list
1148    addLayer_l(lbc);
1149
1150    return ssize_t(name);
1151}
1152
1153status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1154{
1155    Mutex::Autolock _l(mStateLock);
1156    status_t err = purgatorizeLayer_l(layer);
1157    if (err == NO_ERROR)
1158        setTransactionFlags(eTransactionNeeded);
1159    return err;
1160}
1161
1162status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1163{
1164    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1165    if (lbc != 0) {
1166        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1167    }
1168    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1169    if (index >= 0) {
1170        mLayersRemoved = true;
1171        return NO_ERROR;
1172    }
1173    return status_t(index);
1174}
1175
1176status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1177{
1178    // First add the layer to the purgatory list, which makes sure it won't
1179    // go away, then remove it from the main list (through a transaction).
1180    ssize_t err = removeLayer_l(layerBase);
1181    if (err >= 0) {
1182        mLayerPurgatory.add(layerBase);
1183    }
1184
1185    mLayersPendingRemoval.push(layerBase);
1186
1187    // it's possible that we don't find a layer, because it might
1188    // have been destroyed already -- this is not technically an error
1189    // from the user because there is a race between Client::destroySurface(),
1190    // ~Client() and ~ISurface().
1191    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1192}
1193
1194status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1195{
1196    layer->forceVisibilityTransaction();
1197    setTransactionFlags(eTraversalNeeded);
1198    return NO_ERROR;
1199}
1200
1201uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1202{
1203    return android_atomic_release_load(&mTransactionFlags);
1204}
1205
1206uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1207{
1208    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1209}
1210
1211uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1212{
1213    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1214    if ((old & flags)==0) { // wake the server up
1215        signalTransaction();
1216    }
1217    return old;
1218}
1219
1220
1221void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1222        int orientation, uint32_t flags) {
1223    Mutex::Autolock _l(mStateLock);
1224
1225    uint32_t transactionFlags = 0;
1226    if (mCurrentState.orientation != orientation) {
1227        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1228            mCurrentState.orientation = orientation;
1229            transactionFlags |= eTransactionNeeded;
1230        } else if (orientation != eOrientationUnchanged) {
1231            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1232                    orientation);
1233        }
1234    }
1235
1236    const size_t count = state.size();
1237    for (size_t i=0 ; i<count ; i++) {
1238        const ComposerState& s(state[i]);
1239        sp<Client> client( static_cast<Client *>(s.client.get()) );
1240        transactionFlags |= setClientStateLocked(client, s.state);
1241    }
1242
1243    if (transactionFlags) {
1244        // this triggers the transaction
1245        setTransactionFlags(transactionFlags);
1246
1247        // if this is a synchronous transaction, wait for it to take effect
1248        // before returning.
1249        if (flags & eSynchronous) {
1250            mTransationPending = true;
1251        }
1252        while (mTransationPending) {
1253            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1254            if (CC_UNLIKELY(err != NO_ERROR)) {
1255                // just in case something goes wrong in SF, return to the
1256                // called after a few seconds.
1257                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1258                mTransationPending = false;
1259                break;
1260            }
1261        }
1262    }
1263}
1264
1265sp<ISurface> SurfaceFlinger::createSurface(
1266        ISurfaceComposerClient::surface_data_t* params,
1267        const String8& name,
1268        const sp<Client>& client,
1269        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1270        uint32_t flags)
1271{
1272    sp<LayerBaseClient> layer;
1273    sp<ISurface> surfaceHandle;
1274
1275    if (int32_t(w|h) < 0) {
1276        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1277                int(w), int(h));
1278        return surfaceHandle;
1279    }
1280
1281    //ALOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1282    sp<Layer> normalLayer;
1283    switch (flags & eFXSurfaceMask) {
1284        case eFXSurfaceNormal:
1285            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1286            layer = normalLayer;
1287            break;
1288        case eFXSurfaceBlur:
1289            // for now we treat Blur as Dim, until we can implement it
1290            // efficiently.
1291        case eFXSurfaceDim:
1292            layer = createDimSurface(client, d, w, h, flags);
1293            break;
1294        case eFXSurfaceScreenshot:
1295            layer = createScreenshotSurface(client, d, w, h, flags);
1296            break;
1297    }
1298
1299    if (layer != 0) {
1300        layer->initStates(w, h, flags);
1301        layer->setName(name);
1302        ssize_t token = addClientLayer(client, layer);
1303
1304        surfaceHandle = layer->getSurface();
1305        if (surfaceHandle != 0) {
1306            params->token = token;
1307            params->identity = layer->getIdentity();
1308            if (normalLayer != 0) {
1309                Mutex::Autolock _l(mStateLock);
1310                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1311            }
1312        }
1313
1314        setTransactionFlags(eTransactionNeeded);
1315    }
1316
1317    return surfaceHandle;
1318}
1319
1320sp<Layer> SurfaceFlinger::createNormalSurface(
1321        const sp<Client>& client, DisplayID display,
1322        uint32_t w, uint32_t h, uint32_t flags,
1323        PixelFormat& format)
1324{
1325    // initialize the surfaces
1326    switch (format) { // TODO: take h/w into account
1327    case PIXEL_FORMAT_TRANSPARENT:
1328    case PIXEL_FORMAT_TRANSLUCENT:
1329        format = PIXEL_FORMAT_RGBA_8888;
1330        break;
1331    case PIXEL_FORMAT_OPAQUE:
1332#ifdef NO_RGBX_8888
1333        format = PIXEL_FORMAT_RGB_565;
1334#else
1335        format = PIXEL_FORMAT_RGBX_8888;
1336#endif
1337        break;
1338    }
1339
1340#ifdef NO_RGBX_8888
1341    if (format == PIXEL_FORMAT_RGBX_8888)
1342        format = PIXEL_FORMAT_RGBA_8888;
1343#endif
1344
1345    sp<Layer> layer = new Layer(this, display, client);
1346    status_t err = layer->setBuffers(w, h, format, flags);
1347    if (CC_LIKELY(err != NO_ERROR)) {
1348        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1349        layer.clear();
1350    }
1351    return layer;
1352}
1353
1354sp<LayerDim> SurfaceFlinger::createDimSurface(
1355        const sp<Client>& client, DisplayID display,
1356        uint32_t w, uint32_t h, uint32_t flags)
1357{
1358    sp<LayerDim> layer = new LayerDim(this, display, client);
1359    return layer;
1360}
1361
1362sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1363        const sp<Client>& client, DisplayID display,
1364        uint32_t w, uint32_t h, uint32_t flags)
1365{
1366    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1367    return layer;
1368}
1369
1370status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1371{
1372    /*
1373     * called by the window manager, when a surface should be marked for
1374     * destruction.
1375     *
1376     * The surface is removed from the current and drawing lists, but placed
1377     * in the purgatory queue, so it's not destroyed right-away (we need
1378     * to wait for all client's references to go away first).
1379     */
1380
1381    status_t err = NAME_NOT_FOUND;
1382    Mutex::Autolock _l(mStateLock);
1383    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1384    if (layer != 0) {
1385        err = purgatorizeLayer_l(layer);
1386        if (err == NO_ERROR) {
1387            setTransactionFlags(eTransactionNeeded);
1388        }
1389    }
1390    return err;
1391}
1392
1393status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1394{
1395    // called by ~ISurface() when all references are gone
1396    status_t err = NO_ERROR;
1397    sp<LayerBaseClient> l(layer.promote());
1398    if (l != NULL) {
1399        Mutex::Autolock _l(mStateLock);
1400        err = removeLayer_l(l);
1401        if (err == NAME_NOT_FOUND) {
1402            // The surface wasn't in the current list, which means it was
1403            // removed already, which means it is in the purgatory,
1404            // and need to be removed from there.
1405            ssize_t idx = mLayerPurgatory.remove(l);
1406            ALOGE_IF(idx < 0,
1407                    "layer=%p is not in the purgatory list", l.get());
1408        }
1409        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1410                "error removing layer=%p (%s)", l.get(), strerror(-err));
1411    }
1412    return err;
1413}
1414
1415uint32_t SurfaceFlinger::setClientStateLocked(
1416        const sp<Client>& client,
1417        const layer_state_t& s)
1418{
1419    uint32_t flags = 0;
1420    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1421    if (layer != 0) {
1422        const uint32_t what = s.what;
1423        if (what & ePositionChanged) {
1424            if (layer->setPosition(s.x, s.y))
1425                flags |= eTraversalNeeded;
1426        }
1427        if (what & eLayerChanged) {
1428            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1429            if (layer->setLayer(s.z)) {
1430                mCurrentState.layersSortedByZ.removeAt(idx);
1431                mCurrentState.layersSortedByZ.add(layer);
1432                // we need traversal (state changed)
1433                // AND transaction (list changed)
1434                flags |= eTransactionNeeded|eTraversalNeeded;
1435            }
1436        }
1437        if (what & eSizeChanged) {
1438            if (layer->setSize(s.w, s.h)) {
1439                flags |= eTraversalNeeded;
1440            }
1441        }
1442        if (what & eAlphaChanged) {
1443            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1444                flags |= eTraversalNeeded;
1445        }
1446        if (what & eMatrixChanged) {
1447            if (layer->setMatrix(s.matrix))
1448                flags |= eTraversalNeeded;
1449        }
1450        if (what & eTransparentRegionChanged) {
1451            if (layer->setTransparentRegionHint(s.transparentRegion))
1452                flags |= eTraversalNeeded;
1453        }
1454        if (what & eVisibilityChanged) {
1455            if (layer->setFlags(s.flags, s.mask))
1456                flags |= eTraversalNeeded;
1457        }
1458    }
1459    return flags;
1460}
1461
1462void SurfaceFlinger::screenReleased(int dpy)
1463{
1464    // this may be called by a signal handler, we can't do too much in here
1465    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1466    signalTransaction();
1467}
1468
1469void SurfaceFlinger::screenAcquired(int dpy)
1470{
1471    // this may be called by a signal handler, we can't do too much in here
1472    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1473    signalTransaction();
1474}
1475
1476status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1477{
1478    const size_t SIZE = 4096;
1479    char buffer[SIZE];
1480    String8 result;
1481
1482    if (!PermissionCache::checkCallingPermission(sDump)) {
1483        snprintf(buffer, SIZE, "Permission Denial: "
1484                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1485                IPCThreadState::self()->getCallingPid(),
1486                IPCThreadState::self()->getCallingUid());
1487        result.append(buffer);
1488    } else {
1489        // Try to get the main lock, but don't insist if we can't
1490        // (this would indicate SF is stuck, but we want to be able to
1491        // print something in dumpsys).
1492        int retry = 3;
1493        while (mStateLock.tryLock()<0 && --retry>=0) {
1494            usleep(1000000);
1495        }
1496        const bool locked(retry >= 0);
1497        if (!locked) {
1498            snprintf(buffer, SIZE,
1499                    "SurfaceFlinger appears to be unresponsive, "
1500                    "dumping anyways (no locks held)\n");
1501            result.append(buffer);
1502        }
1503
1504        bool dumpAll = true;
1505        size_t index = 0;
1506        size_t numArgs = args.size();
1507        if (numArgs) {
1508            dumpAll = false;
1509
1510            if ((index < numArgs) &&
1511                    (args[index] == String16("--list"))) {
1512                index++;
1513                listLayersLocked(args, index, result, buffer, SIZE);
1514            }
1515
1516            if ((index < numArgs) &&
1517                    (args[index] == String16("--latency"))) {
1518                index++;
1519                dumpStatsLocked(args, index, result, buffer, SIZE);
1520            }
1521
1522            if ((index < numArgs) &&
1523                    (args[index] == String16("--latency-clear"))) {
1524                index++;
1525                clearStatsLocked(args, index, result, buffer, SIZE);
1526            }
1527        }
1528
1529        if (dumpAll) {
1530            dumpAllLocked(result, buffer, SIZE);
1531        }
1532
1533        if (locked) {
1534            mStateLock.unlock();
1535        }
1536    }
1537    write(fd, result.string(), result.size());
1538    return NO_ERROR;
1539}
1540
1541void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1542        String8& result, char* buffer, size_t SIZE) const
1543{
1544    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1545    const size_t count = currentLayers.size();
1546    for (size_t i=0 ; i<count ; i++) {
1547        const sp<LayerBase>& layer(currentLayers[i]);
1548        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1549        result.append(buffer);
1550    }
1551}
1552
1553void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1554        String8& result, char* buffer, size_t SIZE) const
1555{
1556    String8 name;
1557    if (index < args.size()) {
1558        name = String8(args[index]);
1559        index++;
1560    }
1561
1562    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1563    const size_t count = currentLayers.size();
1564    for (size_t i=0 ; i<count ; i++) {
1565        const sp<LayerBase>& layer(currentLayers[i]);
1566        if (name.isEmpty()) {
1567            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1568            result.append(buffer);
1569        }
1570        if (name.isEmpty() || (name == layer->getName())) {
1571            layer->dumpStats(result, buffer, SIZE);
1572        }
1573    }
1574}
1575
1576void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1577        String8& result, char* buffer, size_t SIZE) const
1578{
1579    String8 name;
1580    if (index < args.size()) {
1581        name = String8(args[index]);
1582        index++;
1583    }
1584
1585    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1586    const size_t count = currentLayers.size();
1587    for (size_t i=0 ; i<count ; i++) {
1588        const sp<LayerBase>& layer(currentLayers[i]);
1589        if (name.isEmpty() || (name == layer->getName())) {
1590            layer->clearStats();
1591        }
1592    }
1593}
1594
1595void SurfaceFlinger::dumpAllLocked(
1596        String8& result, char* buffer, size_t SIZE) const
1597{
1598    // figure out if we're stuck somewhere
1599    const nsecs_t now = systemTime();
1600    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1601    const nsecs_t inTransaction(mDebugInTransaction);
1602    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1603    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1604
1605    /*
1606     * Dump the visible layer list
1607     */
1608    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1609    const size_t count = currentLayers.size();
1610    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1611    result.append(buffer);
1612    for (size_t i=0 ; i<count ; i++) {
1613        const sp<LayerBase>& layer(currentLayers[i]);
1614        layer->dump(result, buffer, SIZE);
1615    }
1616
1617    /*
1618     * Dump the layers in the purgatory
1619     */
1620
1621    const size_t purgatorySize = mLayerPurgatory.size();
1622    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1623    result.append(buffer);
1624    for (size_t i=0 ; i<purgatorySize ; i++) {
1625        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1626        layer->shortDump(result, buffer, SIZE);
1627    }
1628
1629    /*
1630     * Dump SurfaceFlinger global state
1631     */
1632
1633    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1634    result.append(buffer);
1635
1636    const GLExtensions& extensions(GLExtensions::getInstance());
1637    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1638            extensions.getVendor(),
1639            extensions.getRenderer(),
1640            extensions.getVersion());
1641    result.append(buffer);
1642
1643    snprintf(buffer, SIZE, "EGL : %s\n",
1644            eglQueryString(graphicPlane(0).getEGLDisplay(),
1645                    EGL_VERSION_HW_ANDROID));
1646    result.append(buffer);
1647
1648    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1649    result.append(buffer);
1650
1651    mWormholeRegion.dump(result, "WormholeRegion");
1652    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1653    snprintf(buffer, SIZE,
1654            "  orientation=%d, canDraw=%d\n",
1655            mCurrentState.orientation, hw.canDraw());
1656    result.append(buffer);
1657    snprintf(buffer, SIZE,
1658            "  last eglSwapBuffers() time: %f us\n"
1659            "  last transaction time     : %f us\n"
1660            "  transaction-flags         : %08x\n"
1661            "  refresh-rate              : %f fps\n"
1662            "  x-dpi                     : %f\n"
1663            "  y-dpi                     : %f\n",
1664            mLastSwapBufferTime/1000.0,
1665            mLastTransactionTime/1000.0,
1666            mTransactionFlags,
1667            hw.getRefreshRate(),
1668            hw.getDpiX(),
1669            hw.getDpiY());
1670    result.append(buffer);
1671
1672    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1673            inSwapBuffersDuration/1000.0);
1674    result.append(buffer);
1675
1676    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1677            inTransactionDuration/1000.0);
1678    result.append(buffer);
1679
1680    /*
1681     * VSYNC state
1682     */
1683    mEventThread->dump(result, buffer, SIZE);
1684
1685    /*
1686     * Dump HWComposer state
1687     */
1688    HWComposer& hwc(hw.getHwComposer());
1689    snprintf(buffer, SIZE, "h/w composer state:\n");
1690    result.append(buffer);
1691    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1692            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1693                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1694    result.append(buffer);
1695    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1696
1697    /*
1698     * Dump gralloc state
1699     */
1700    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1701    alloc.dump(result);
1702    hw.dump(result);
1703}
1704
1705status_t SurfaceFlinger::onTransact(
1706    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1707{
1708    switch (code) {
1709        case CREATE_CONNECTION:
1710        case SET_TRANSACTION_STATE:
1711        case SET_ORIENTATION:
1712        case BOOT_FINISHED:
1713        case TURN_ELECTRON_BEAM_OFF:
1714        case TURN_ELECTRON_BEAM_ON:
1715        {
1716            // codes that require permission check
1717            IPCThreadState* ipc = IPCThreadState::self();
1718            const int pid = ipc->getCallingPid();
1719            const int uid = ipc->getCallingUid();
1720            if ((uid != AID_GRAPHICS) &&
1721                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1722                ALOGE("Permission Denial: "
1723                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1724                return PERMISSION_DENIED;
1725            }
1726            break;
1727        }
1728        case CAPTURE_SCREEN:
1729        {
1730            // codes that require permission check
1731            IPCThreadState* ipc = IPCThreadState::self();
1732            const int pid = ipc->getCallingPid();
1733            const int uid = ipc->getCallingUid();
1734            if ((uid != AID_GRAPHICS) &&
1735                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1736                ALOGE("Permission Denial: "
1737                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1738                return PERMISSION_DENIED;
1739            }
1740            break;
1741        }
1742    }
1743
1744    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1745    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1746        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1747        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1748            IPCThreadState* ipc = IPCThreadState::self();
1749            const int pid = ipc->getCallingPid();
1750            const int uid = ipc->getCallingUid();
1751            ALOGE("Permission Denial: "
1752                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1753            return PERMISSION_DENIED;
1754        }
1755        int n;
1756        switch (code) {
1757            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1758            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1759                return NO_ERROR;
1760            case 1002:  // SHOW_UPDATES
1761                n = data.readInt32();
1762                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1763                invalidateHwcGeometry();
1764                repaintEverything();
1765                return NO_ERROR;
1766            case 1003:  // SHOW_BACKGROUND
1767                n = data.readInt32();
1768                mDebugBackground = n ? 1 : 0;
1769                return NO_ERROR;
1770            case 1004:{ // repaint everything
1771                repaintEverything();
1772                return NO_ERROR;
1773            }
1774            case 1005:{ // force transaction
1775                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1776                return NO_ERROR;
1777            }
1778            case 1008:  // toggle use of hw composer
1779                n = data.readInt32();
1780                mDebugDisableHWC = n ? 1 : 0;
1781                invalidateHwcGeometry();
1782                repaintEverything();
1783                return NO_ERROR;
1784            case 1009:  // toggle use of transform hint
1785                n = data.readInt32();
1786                mDebugDisableTransformHint = n ? 1 : 0;
1787                invalidateHwcGeometry();
1788                repaintEverything();
1789                return NO_ERROR;
1790            case 1010:  // interrogate.
1791                reply->writeInt32(0);
1792                reply->writeInt32(0);
1793                reply->writeInt32(mDebugRegion);
1794                reply->writeInt32(mDebugBackground);
1795                return NO_ERROR;
1796            case 1013: {
1797                Mutex::Autolock _l(mStateLock);
1798                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1799                reply->writeInt32(hw.getPageFlipCount());
1800            }
1801            return NO_ERROR;
1802        }
1803    }
1804    return err;
1805}
1806
1807void SurfaceFlinger::repaintEverything() {
1808    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1809    const Rect bounds(hw.getBounds());
1810    setInvalidateRegion(Region(bounds));
1811    signalTransaction();
1812}
1813
1814void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1815    Mutex::Autolock _l(mInvalidateLock);
1816    mInvalidateRegion = reg;
1817}
1818
1819Region SurfaceFlinger::getAndClearInvalidateRegion() {
1820    Mutex::Autolock _l(mInvalidateLock);
1821    Region reg(mInvalidateRegion);
1822    mInvalidateRegion.clear();
1823    return reg;
1824}
1825
1826// ---------------------------------------------------------------------------
1827
1828status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1829        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1830{
1831    Mutex::Autolock _l(mStateLock);
1832    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1833}
1834
1835status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1836        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1837{
1838    if (!GLExtensions::getInstance().haveFramebufferObject())
1839        return INVALID_OPERATION;
1840
1841    // get screen geometry
1842    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1843    const uint32_t hw_w = hw.getWidth();
1844    const uint32_t hw_h = hw.getHeight();
1845    GLfloat u = 1;
1846    GLfloat v = 1;
1847
1848    // make sure to clear all GL error flags
1849    while ( glGetError() != GL_NO_ERROR ) ;
1850
1851    // create a FBO
1852    GLuint name, tname;
1853    glGenTextures(1, &tname);
1854    glBindTexture(GL_TEXTURE_2D, tname);
1855    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1856            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1857    if (glGetError() != GL_NO_ERROR) {
1858        while ( glGetError() != GL_NO_ERROR ) ;
1859        GLint tw = (2 << (31 - clz(hw_w)));
1860        GLint th = (2 << (31 - clz(hw_h)));
1861        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1862                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1863        u = GLfloat(hw_w) / tw;
1864        v = GLfloat(hw_h) / th;
1865    }
1866    glGenFramebuffersOES(1, &name);
1867    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1868    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1869            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1870
1871    // redraw the screen entirely...
1872    glDisable(GL_TEXTURE_EXTERNAL_OES);
1873    glDisable(GL_TEXTURE_2D);
1874    glDisable(GL_SCISSOR_TEST);
1875    glClearColor(0,0,0,1);
1876    glClear(GL_COLOR_BUFFER_BIT);
1877    glEnable(GL_SCISSOR_TEST);
1878    glMatrixMode(GL_MODELVIEW);
1879    glLoadIdentity();
1880    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1881    const size_t count = layers.size();
1882    for (size_t i=0 ; i<count ; ++i) {
1883        const sp<LayerBase>& layer(layers[i]);
1884        layer->drawForSreenShot();
1885    }
1886
1887    hw.compositionComplete();
1888
1889    // back to main framebuffer
1890    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1891    glDisable(GL_SCISSOR_TEST);
1892    glDeleteFramebuffersOES(1, &name);
1893
1894    *textureName = tname;
1895    *uOut = u;
1896    *vOut = v;
1897    return NO_ERROR;
1898}
1899
1900// ---------------------------------------------------------------------------
1901
1902status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1903{
1904    // get screen geometry
1905    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1906    const uint32_t hw_w = hw.getWidth();
1907    const uint32_t hw_h = hw.getHeight();
1908    const Region screenBounds(hw.getBounds());
1909
1910    GLfloat u, v;
1911    GLuint tname;
1912    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1913    if (result != NO_ERROR) {
1914        return result;
1915    }
1916
1917    GLfloat vtx[8];
1918    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1919    glBindTexture(GL_TEXTURE_2D, tname);
1920    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1921    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1922    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1923    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1924    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1925    glVertexPointer(2, GL_FLOAT, 0, vtx);
1926
1927    /*
1928     * Texture coordinate mapping
1929     *
1930     *                 u
1931     *    1 +----------+---+
1932     *      |     |    |   |  image is inverted
1933     *      |     V    |   |  w.r.t. the texture
1934     *  1-v +----------+   |  coordinates
1935     *      |              |
1936     *      |              |
1937     *      |              |
1938     *    0 +--------------+
1939     *      0              1
1940     *
1941     */
1942
1943    class s_curve_interpolator {
1944        const float nbFrames, s, v;
1945    public:
1946        s_curve_interpolator(int nbFrames, float s)
1947        : nbFrames(1.0f / (nbFrames-1)), s(s),
1948          v(1.0f + expf(-s + 0.5f*s)) {
1949        }
1950        float operator()(int f) {
1951            const float x = f * nbFrames;
1952            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1953        }
1954    };
1955
1956    class v_stretch {
1957        const GLfloat hw_w, hw_h;
1958    public:
1959        v_stretch(uint32_t hw_w, uint32_t hw_h)
1960        : hw_w(hw_w), hw_h(hw_h) {
1961        }
1962        void operator()(GLfloat* vtx, float v) {
1963            const GLfloat w = hw_w + (hw_w * v);
1964            const GLfloat h = hw_h - (hw_h * v);
1965            const GLfloat x = (hw_w - w) * 0.5f;
1966            const GLfloat y = (hw_h - h) * 0.5f;
1967            vtx[0] = x;         vtx[1] = y;
1968            vtx[2] = x;         vtx[3] = y + h;
1969            vtx[4] = x + w;     vtx[5] = y + h;
1970            vtx[6] = x + w;     vtx[7] = y;
1971        }
1972    };
1973
1974    class h_stretch {
1975        const GLfloat hw_w, hw_h;
1976    public:
1977        h_stretch(uint32_t hw_w, uint32_t hw_h)
1978        : hw_w(hw_w), hw_h(hw_h) {
1979        }
1980        void operator()(GLfloat* vtx, float v) {
1981            const GLfloat w = hw_w - (hw_w * v);
1982            const GLfloat h = 1.0f;
1983            const GLfloat x = (hw_w - w) * 0.5f;
1984            const GLfloat y = (hw_h - h) * 0.5f;
1985            vtx[0] = x;         vtx[1] = y;
1986            vtx[2] = x;         vtx[3] = y + h;
1987            vtx[4] = x + w;     vtx[5] = y + h;
1988            vtx[6] = x + w;     vtx[7] = y;
1989        }
1990    };
1991
1992    // the full animation is 24 frames
1993    char value[PROPERTY_VALUE_MAX];
1994    property_get("debug.sf.electron_frames", value, "24");
1995    int nbFrames = (atoi(value) + 1) >> 1;
1996    if (nbFrames <= 0) // just in case
1997        nbFrames = 24;
1998
1999    s_curve_interpolator itr(nbFrames, 7.5f);
2000    s_curve_interpolator itg(nbFrames, 8.0f);
2001    s_curve_interpolator itb(nbFrames, 8.5f);
2002
2003    v_stretch vverts(hw_w, hw_h);
2004
2005    glMatrixMode(GL_TEXTURE);
2006    glLoadIdentity();
2007    glMatrixMode(GL_MODELVIEW);
2008    glLoadIdentity();
2009
2010    glEnable(GL_BLEND);
2011    glBlendFunc(GL_ONE, GL_ONE);
2012    for (int i=0 ; i<nbFrames ; i++) {
2013        float x, y, w, h;
2014        const float vr = itr(i);
2015        const float vg = itg(i);
2016        const float vb = itb(i);
2017
2018        // clear screen
2019        glColorMask(1,1,1,1);
2020        glClear(GL_COLOR_BUFFER_BIT);
2021        glEnable(GL_TEXTURE_2D);
2022
2023        // draw the red plane
2024        vverts(vtx, vr);
2025        glColorMask(1,0,0,1);
2026        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2027
2028        // draw the green plane
2029        vverts(vtx, vg);
2030        glColorMask(0,1,0,1);
2031        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2032
2033        // draw the blue plane
2034        vverts(vtx, vb);
2035        glColorMask(0,0,1,1);
2036        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2037
2038        // draw the white highlight (we use the last vertices)
2039        glDisable(GL_TEXTURE_2D);
2040        glColorMask(1,1,1,1);
2041        glColor4f(vg, vg, vg, 1);
2042        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2043        hw.flip(screenBounds);
2044    }
2045
2046    h_stretch hverts(hw_w, hw_h);
2047    glDisable(GL_BLEND);
2048    glDisable(GL_TEXTURE_2D);
2049    glColorMask(1,1,1,1);
2050    for (int i=0 ; i<nbFrames ; i++) {
2051        const float v = itg(i);
2052        hverts(vtx, v);
2053        glClear(GL_COLOR_BUFFER_BIT);
2054        glColor4f(1-v, 1-v, 1-v, 1);
2055        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2056        hw.flip(screenBounds);
2057    }
2058
2059    glColorMask(1,1,1,1);
2060    glEnable(GL_SCISSOR_TEST);
2061    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2062    glDeleteTextures(1, &tname);
2063    glDisable(GL_TEXTURE_2D);
2064    glDisable(GL_BLEND);
2065    return NO_ERROR;
2066}
2067
2068status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2069{
2070    status_t result = PERMISSION_DENIED;
2071
2072    if (!GLExtensions::getInstance().haveFramebufferObject())
2073        return INVALID_OPERATION;
2074
2075
2076    // get screen geometry
2077    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2078    const uint32_t hw_w = hw.getWidth();
2079    const uint32_t hw_h = hw.getHeight();
2080    const Region screenBounds(hw.bounds());
2081
2082    GLfloat u, v;
2083    GLuint tname;
2084    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2085    if (result != NO_ERROR) {
2086        return result;
2087    }
2088
2089    GLfloat vtx[8];
2090    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2091    glBindTexture(GL_TEXTURE_2D, tname);
2092    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2093    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2094    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2095    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2096    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2097    glVertexPointer(2, GL_FLOAT, 0, vtx);
2098
2099    class s_curve_interpolator {
2100        const float nbFrames, s, v;
2101    public:
2102        s_curve_interpolator(int nbFrames, float s)
2103        : nbFrames(1.0f / (nbFrames-1)), s(s),
2104          v(1.0f + expf(-s + 0.5f*s)) {
2105        }
2106        float operator()(int f) {
2107            const float x = f * nbFrames;
2108            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2109        }
2110    };
2111
2112    class v_stretch {
2113        const GLfloat hw_w, hw_h;
2114    public:
2115        v_stretch(uint32_t hw_w, uint32_t hw_h)
2116        : hw_w(hw_w), hw_h(hw_h) {
2117        }
2118        void operator()(GLfloat* vtx, float v) {
2119            const GLfloat w = hw_w + (hw_w * v);
2120            const GLfloat h = hw_h - (hw_h * v);
2121            const GLfloat x = (hw_w - w) * 0.5f;
2122            const GLfloat y = (hw_h - h) * 0.5f;
2123            vtx[0] = x;         vtx[1] = y;
2124            vtx[2] = x;         vtx[3] = y + h;
2125            vtx[4] = x + w;     vtx[5] = y + h;
2126            vtx[6] = x + w;     vtx[7] = y;
2127        }
2128    };
2129
2130    class h_stretch {
2131        const GLfloat hw_w, hw_h;
2132    public:
2133        h_stretch(uint32_t hw_w, uint32_t hw_h)
2134        : hw_w(hw_w), hw_h(hw_h) {
2135        }
2136        void operator()(GLfloat* vtx, float v) {
2137            const GLfloat w = hw_w - (hw_w * v);
2138            const GLfloat h = 1.0f;
2139            const GLfloat x = (hw_w - w) * 0.5f;
2140            const GLfloat y = (hw_h - h) * 0.5f;
2141            vtx[0] = x;         vtx[1] = y;
2142            vtx[2] = x;         vtx[3] = y + h;
2143            vtx[4] = x + w;     vtx[5] = y + h;
2144            vtx[6] = x + w;     vtx[7] = y;
2145        }
2146    };
2147
2148    // the full animation is 12 frames
2149    int nbFrames = 8;
2150    s_curve_interpolator itr(nbFrames, 7.5f);
2151    s_curve_interpolator itg(nbFrames, 8.0f);
2152    s_curve_interpolator itb(nbFrames, 8.5f);
2153
2154    h_stretch hverts(hw_w, hw_h);
2155    glDisable(GL_BLEND);
2156    glDisable(GL_TEXTURE_2D);
2157    glColorMask(1,1,1,1);
2158    for (int i=nbFrames-1 ; i>=0 ; i--) {
2159        const float v = itg(i);
2160        hverts(vtx, v);
2161        glClear(GL_COLOR_BUFFER_BIT);
2162        glColor4f(1-v, 1-v, 1-v, 1);
2163        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2164        hw.flip(screenBounds);
2165    }
2166
2167    nbFrames = 4;
2168    v_stretch vverts(hw_w, hw_h);
2169    glEnable(GL_BLEND);
2170    glBlendFunc(GL_ONE, GL_ONE);
2171    for (int i=nbFrames-1 ; i>=0 ; i--) {
2172        float x, y, w, h;
2173        const float vr = itr(i);
2174        const float vg = itg(i);
2175        const float vb = itb(i);
2176
2177        // clear screen
2178        glColorMask(1,1,1,1);
2179        glClear(GL_COLOR_BUFFER_BIT);
2180        glEnable(GL_TEXTURE_2D);
2181
2182        // draw the red plane
2183        vverts(vtx, vr);
2184        glColorMask(1,0,0,1);
2185        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2186
2187        // draw the green plane
2188        vverts(vtx, vg);
2189        glColorMask(0,1,0,1);
2190        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2191
2192        // draw the blue plane
2193        vverts(vtx, vb);
2194        glColorMask(0,0,1,1);
2195        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2196
2197        hw.flip(screenBounds);
2198    }
2199
2200    glColorMask(1,1,1,1);
2201    glEnable(GL_SCISSOR_TEST);
2202    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2203    glDeleteTextures(1, &tname);
2204    glDisable(GL_TEXTURE_2D);
2205    glDisable(GL_BLEND);
2206
2207    return NO_ERROR;
2208}
2209
2210// ---------------------------------------------------------------------------
2211
2212status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2213{
2214    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2215    if (!hw.canDraw()) {
2216        // we're already off
2217        return NO_ERROR;
2218    }
2219
2220    // turn off hwc while we're doing the animation
2221    hw.getHwComposer().disable();
2222    // and make sure to turn it back on (if needed) next time we compose
2223    invalidateHwcGeometry();
2224
2225    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2226        electronBeamOffAnimationImplLocked();
2227    }
2228
2229    // always clear the whole screen at the end of the animation
2230    glClearColor(0,0,0,1);
2231    glDisable(GL_SCISSOR_TEST);
2232    glClear(GL_COLOR_BUFFER_BIT);
2233    glEnable(GL_SCISSOR_TEST);
2234    hw.flip( Region(hw.bounds()) );
2235
2236    return NO_ERROR;
2237}
2238
2239status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2240{
2241    class MessageTurnElectronBeamOff : public MessageBase {
2242        SurfaceFlinger* flinger;
2243        int32_t mode;
2244        status_t result;
2245    public:
2246        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2247            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2248        }
2249        status_t getResult() const {
2250            return result;
2251        }
2252        virtual bool handler() {
2253            Mutex::Autolock _l(flinger->mStateLock);
2254            result = flinger->turnElectronBeamOffImplLocked(mode);
2255            return true;
2256        }
2257    };
2258
2259    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2260    status_t res = postMessageSync(msg);
2261    if (res == NO_ERROR) {
2262        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2263
2264        // work-around: when the power-manager calls us we activate the
2265        // animation. eventually, the "on" animation will be called
2266        // by the power-manager itself
2267        mElectronBeamAnimationMode = mode;
2268    }
2269    return res;
2270}
2271
2272// ---------------------------------------------------------------------------
2273
2274status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2275{
2276    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2277    if (hw.canDraw()) {
2278        // we're already on
2279        return NO_ERROR;
2280    }
2281    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2282        electronBeamOnAnimationImplLocked();
2283    }
2284
2285    // make sure to redraw the whole screen when the animation is done
2286    mDirtyRegion.set(hw.bounds());
2287    signalTransaction();
2288
2289    return NO_ERROR;
2290}
2291
2292status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2293{
2294    class MessageTurnElectronBeamOn : public MessageBase {
2295        SurfaceFlinger* flinger;
2296        int32_t mode;
2297        status_t result;
2298    public:
2299        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2300            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2301        }
2302        status_t getResult() const {
2303            return result;
2304        }
2305        virtual bool handler() {
2306            Mutex::Autolock _l(flinger->mStateLock);
2307            result = flinger->turnElectronBeamOnImplLocked(mode);
2308            return true;
2309        }
2310    };
2311
2312    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2313    return NO_ERROR;
2314}
2315
2316// ---------------------------------------------------------------------------
2317
2318status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2319        sp<IMemoryHeap>* heap,
2320        uint32_t* w, uint32_t* h, PixelFormat* f,
2321        uint32_t sw, uint32_t sh,
2322        uint32_t minLayerZ, uint32_t maxLayerZ)
2323{
2324    status_t result = PERMISSION_DENIED;
2325
2326    // only one display supported for now
2327    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2328        return BAD_VALUE;
2329
2330    if (!GLExtensions::getInstance().haveFramebufferObject())
2331        return INVALID_OPERATION;
2332
2333    // get screen geometry
2334    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2335    const uint32_t hw_w = hw.getWidth();
2336    const uint32_t hw_h = hw.getHeight();
2337
2338    if ((sw > hw_w) || (sh > hw_h))
2339        return BAD_VALUE;
2340
2341    sw = (!sw) ? hw_w : sw;
2342    sh = (!sh) ? hw_h : sh;
2343    const size_t size = sw * sh * 4;
2344
2345    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2346    //        sw, sh, minLayerZ, maxLayerZ);
2347
2348    // make sure to clear all GL error flags
2349    while ( glGetError() != GL_NO_ERROR ) ;
2350
2351    // create a FBO
2352    GLuint name, tname;
2353    glGenRenderbuffersOES(1, &tname);
2354    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2355    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2356    glGenFramebuffersOES(1, &name);
2357    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2358    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2359            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2360
2361    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2362
2363    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2364
2365        // invert everything, b/c glReadPixel() below will invert the FB
2366        glViewport(0, 0, sw, sh);
2367        glScissor(0, 0, sw, sh);
2368        glEnable(GL_SCISSOR_TEST);
2369        glMatrixMode(GL_PROJECTION);
2370        glPushMatrix();
2371        glLoadIdentity();
2372        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2373        glMatrixMode(GL_MODELVIEW);
2374
2375        // redraw the screen entirely...
2376        glClearColor(0,0,0,1);
2377        glClear(GL_COLOR_BUFFER_BIT);
2378
2379        const LayerVector& layers(mDrawingState.layersSortedByZ);
2380        const size_t count = layers.size();
2381        for (size_t i=0 ; i<count ; ++i) {
2382            const sp<LayerBase>& layer(layers[i]);
2383            const uint32_t flags = layer->drawingState().flags;
2384            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2385                const uint32_t z = layer->drawingState().z;
2386                if (z >= minLayerZ && z <= maxLayerZ) {
2387                    layer->drawForSreenShot();
2388                }
2389            }
2390        }
2391
2392        // XXX: this is needed on tegra
2393        glEnable(GL_SCISSOR_TEST);
2394        glScissor(0, 0, sw, sh);
2395
2396        // check for errors and return screen capture
2397        if (glGetError() != GL_NO_ERROR) {
2398            // error while rendering
2399            result = INVALID_OPERATION;
2400        } else {
2401            // allocate shared memory large enough to hold the
2402            // screen capture
2403            sp<MemoryHeapBase> base(
2404                    new MemoryHeapBase(size, 0, "screen-capture") );
2405            void* const ptr = base->getBase();
2406            if (ptr) {
2407                // capture the screen with glReadPixels()
2408                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2409                if (glGetError() == GL_NO_ERROR) {
2410                    *heap = base;
2411                    *w = sw;
2412                    *h = sh;
2413                    *f = PIXEL_FORMAT_RGBA_8888;
2414                    result = NO_ERROR;
2415                }
2416            } else {
2417                result = NO_MEMORY;
2418            }
2419        }
2420        glEnable(GL_SCISSOR_TEST);
2421        glViewport(0, 0, hw_w, hw_h);
2422        glMatrixMode(GL_PROJECTION);
2423        glPopMatrix();
2424        glMatrixMode(GL_MODELVIEW);
2425    } else {
2426        result = BAD_VALUE;
2427    }
2428
2429    // release FBO resources
2430    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2431    glDeleteRenderbuffersOES(1, &tname);
2432    glDeleteFramebuffersOES(1, &name);
2433
2434    hw.compositionComplete();
2435
2436    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2437
2438    return result;
2439}
2440
2441
2442status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2443        sp<IMemoryHeap>* heap,
2444        uint32_t* width, uint32_t* height, PixelFormat* format,
2445        uint32_t sw, uint32_t sh,
2446        uint32_t minLayerZ, uint32_t maxLayerZ)
2447{
2448    // only one display supported for now
2449    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2450        return BAD_VALUE;
2451
2452    if (!GLExtensions::getInstance().haveFramebufferObject())
2453        return INVALID_OPERATION;
2454
2455    class MessageCaptureScreen : public MessageBase {
2456        SurfaceFlinger* flinger;
2457        DisplayID dpy;
2458        sp<IMemoryHeap>* heap;
2459        uint32_t* w;
2460        uint32_t* h;
2461        PixelFormat* f;
2462        uint32_t sw;
2463        uint32_t sh;
2464        uint32_t minLayerZ;
2465        uint32_t maxLayerZ;
2466        status_t result;
2467    public:
2468        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2469                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2470                uint32_t sw, uint32_t sh,
2471                uint32_t minLayerZ, uint32_t maxLayerZ)
2472            : flinger(flinger), dpy(dpy),
2473              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2474              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2475              result(PERMISSION_DENIED)
2476        {
2477        }
2478        status_t getResult() const {
2479            return result;
2480        }
2481        virtual bool handler() {
2482            Mutex::Autolock _l(flinger->mStateLock);
2483
2484            // if we have secure windows, never allow the screen capture
2485            if (flinger->mSecureFrameBuffer)
2486                return true;
2487
2488            result = flinger->captureScreenImplLocked(dpy,
2489                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2490
2491            return true;
2492        }
2493    };
2494
2495    sp<MessageBase> msg = new MessageCaptureScreen(this,
2496            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2497    status_t res = postMessageSync(msg);
2498    if (res == NO_ERROR) {
2499        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2500    }
2501    return res;
2502}
2503
2504// ---------------------------------------------------------------------------
2505
2506sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2507{
2508    sp<Layer> result;
2509    Mutex::Autolock _l(mStateLock);
2510    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2511    return result;
2512}
2513
2514// ---------------------------------------------------------------------------
2515
2516Client::Client(const sp<SurfaceFlinger>& flinger)
2517    : mFlinger(flinger), mNameGenerator(1)
2518{
2519}
2520
2521Client::~Client()
2522{
2523    const size_t count = mLayers.size();
2524    for (size_t i=0 ; i<count ; i++) {
2525        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2526        if (layer != 0) {
2527            mFlinger->removeLayer(layer);
2528        }
2529    }
2530}
2531
2532status_t Client::initCheck() const {
2533    return NO_ERROR;
2534}
2535
2536size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2537{
2538    Mutex::Autolock _l(mLock);
2539    size_t name = mNameGenerator++;
2540    mLayers.add(name, layer);
2541    return name;
2542}
2543
2544void Client::detachLayer(const LayerBaseClient* layer)
2545{
2546    Mutex::Autolock _l(mLock);
2547    // we do a linear search here, because this doesn't happen often
2548    const size_t count = mLayers.size();
2549    for (size_t i=0 ; i<count ; i++) {
2550        if (mLayers.valueAt(i) == layer) {
2551            mLayers.removeItemsAt(i, 1);
2552            break;
2553        }
2554    }
2555}
2556sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2557{
2558    Mutex::Autolock _l(mLock);
2559    sp<LayerBaseClient> lbc;
2560    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2561    if (layer != 0) {
2562        lbc = layer.promote();
2563        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2564    }
2565    return lbc;
2566}
2567
2568
2569status_t Client::onTransact(
2570    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2571{
2572    // these must be checked
2573     IPCThreadState* ipc = IPCThreadState::self();
2574     const int pid = ipc->getCallingPid();
2575     const int uid = ipc->getCallingUid();
2576     const int self_pid = getpid();
2577     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2578         // we're called from a different process, do the real check
2579         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2580         {
2581             ALOGE("Permission Denial: "
2582                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2583             return PERMISSION_DENIED;
2584         }
2585     }
2586     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2587}
2588
2589
2590sp<ISurface> Client::createSurface(
2591        ISurfaceComposerClient::surface_data_t* params,
2592        const String8& name,
2593        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2594        uint32_t flags)
2595{
2596    /*
2597     * createSurface must be called from the GL thread so that it can
2598     * have access to the GL context.
2599     */
2600
2601    class MessageCreateSurface : public MessageBase {
2602        sp<ISurface> result;
2603        SurfaceFlinger* flinger;
2604        ISurfaceComposerClient::surface_data_t* params;
2605        Client* client;
2606        const String8& name;
2607        DisplayID display;
2608        uint32_t w, h;
2609        PixelFormat format;
2610        uint32_t flags;
2611    public:
2612        MessageCreateSurface(SurfaceFlinger* flinger,
2613                ISurfaceComposerClient::surface_data_t* params,
2614                const String8& name, Client* client,
2615                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2616                uint32_t flags)
2617            : flinger(flinger), params(params), client(client), name(name),
2618              display(display), w(w), h(h), format(format), flags(flags)
2619        {
2620        }
2621        sp<ISurface> getResult() const { return result; }
2622        virtual bool handler() {
2623            result = flinger->createSurface(params, name, client,
2624                    display, w, h, format, flags);
2625            return true;
2626        }
2627    };
2628
2629    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2630            params, name, this, display, w, h, format, flags);
2631    mFlinger->postMessageSync(msg);
2632    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2633}
2634status_t Client::destroySurface(SurfaceID sid) {
2635    return mFlinger->removeSurface(this, sid);
2636}
2637
2638// ---------------------------------------------------------------------------
2639
2640GraphicBufferAlloc::GraphicBufferAlloc() {}
2641
2642GraphicBufferAlloc::~GraphicBufferAlloc() {}
2643
2644sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2645        PixelFormat format, uint32_t usage, status_t* error) {
2646    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2647    status_t err = graphicBuffer->initCheck();
2648    *error = err;
2649    if (err != 0 || graphicBuffer->handle == 0) {
2650        if (err == NO_MEMORY) {
2651            GraphicBuffer::dumpAllocationsToSystemLog();
2652        }
2653        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2654             "failed (%s), handle=%p",
2655                w, h, strerror(-err), graphicBuffer->handle);
2656        return 0;
2657    }
2658    return graphicBuffer;
2659}
2660
2661// ---------------------------------------------------------------------------
2662
2663GraphicPlane::GraphicPlane()
2664    : mHw(0)
2665{
2666}
2667
2668GraphicPlane::~GraphicPlane() {
2669    delete mHw;
2670}
2671
2672bool GraphicPlane::initialized() const {
2673    return mHw ? true : false;
2674}
2675
2676int GraphicPlane::getWidth() const {
2677    return mWidth;
2678}
2679
2680int GraphicPlane::getHeight() const {
2681    return mHeight;
2682}
2683
2684void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2685{
2686    mHw = hw;
2687
2688    // initialize the display orientation transform.
2689    // it's a constant that should come from the display driver.
2690    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2691    char property[PROPERTY_VALUE_MAX];
2692    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2693        //displayOrientation
2694        switch (atoi(property)) {
2695        case 90:
2696            displayOrientation = ISurfaceComposer::eOrientation90;
2697            break;
2698        case 270:
2699            displayOrientation = ISurfaceComposer::eOrientation270;
2700            break;
2701        }
2702    }
2703
2704    const float w = hw->getWidth();
2705    const float h = hw->getHeight();
2706    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2707            &mDisplayTransform);
2708    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2709        mDisplayWidth = h;
2710        mDisplayHeight = w;
2711    } else {
2712        mDisplayWidth = w;
2713        mDisplayHeight = h;
2714    }
2715
2716    setOrientation(ISurfaceComposer::eOrientationDefault);
2717}
2718
2719status_t GraphicPlane::orientationToTransfrom(
2720        int orientation, int w, int h, Transform* tr)
2721{
2722    uint32_t flags = 0;
2723    switch (orientation) {
2724    case ISurfaceComposer::eOrientationDefault:
2725        flags = Transform::ROT_0;
2726        break;
2727    case ISurfaceComposer::eOrientation90:
2728        flags = Transform::ROT_90;
2729        break;
2730    case ISurfaceComposer::eOrientation180:
2731        flags = Transform::ROT_180;
2732        break;
2733    case ISurfaceComposer::eOrientation270:
2734        flags = Transform::ROT_270;
2735        break;
2736    default:
2737        return BAD_VALUE;
2738    }
2739    tr->set(flags, w, h);
2740    return NO_ERROR;
2741}
2742
2743status_t GraphicPlane::setOrientation(int orientation)
2744{
2745    // If the rotation can be handled in hardware, this is where
2746    // the magic should happen.
2747
2748    const DisplayHardware& hw(displayHardware());
2749    const float w = mDisplayWidth;
2750    const float h = mDisplayHeight;
2751    mWidth = int(w);
2752    mHeight = int(h);
2753
2754    Transform orientationTransform;
2755    GraphicPlane::orientationToTransfrom(orientation, w, h,
2756            &orientationTransform);
2757    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2758        mWidth = int(h);
2759        mHeight = int(w);
2760    }
2761
2762    mOrientation = orientation;
2763    mGlobalTransform = mDisplayTransform * orientationTransform;
2764    return NO_ERROR;
2765}
2766
2767const DisplayHardware& GraphicPlane::displayHardware() const {
2768    return *mHw;
2769}
2770
2771DisplayHardware& GraphicPlane::editDisplayHardware() {
2772    return *mHw;
2773}
2774
2775const Transform& GraphicPlane::transform() const {
2776    return mGlobalTransform;
2777}
2778
2779EGLDisplay GraphicPlane::getEGLDisplay() const {
2780    return mHw->getEGLDisplay();
2781}
2782
2783// ---------------------------------------------------------------------------
2784
2785}; // namespace android
2786