SurfaceFlinger.cpp revision 4b2ba53423ac2dc795a5a0bf72f6d787d9dc8950 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <stdint.h>
22#include <unistd.h>
23#include <fcntl.h>
24#include <errno.h>
25#include <math.h>
26#include <limits.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/ioctl.h>
30
31#include <cutils/log.h>
32#include <cutils/properties.h>
33
34#include <binder/IPCThreadState.h>
35#include <binder/IServiceManager.h>
36#include <binder/MemoryHeapBase.h>
37#include <binder/PermissionCache.h>
38
39#include <gui/IDisplayEventConnection.h>
40
41#include <utils/String8.h>
42#include <utils/String16.h>
43#include <utils/StopWatch.h>
44#include <utils/Trace.h>
45
46#include <ui/GraphicBufferAllocator.h>
47#include <ui/PixelFormat.h>
48
49#include <GLES/gl.h>
50
51#include "clz.h"
52#include "DdmConnection.h"
53#include "DisplayEventConnection.h"
54#include "EventThread.h"
55#include "GLExtensions.h"
56#include "Layer.h"
57#include "LayerDim.h"
58#include "LayerScreenshot.h"
59#include "SurfaceFlinger.h"
60
61#include "DisplayHardware/DisplayHardware.h"
62#include "DisplayHardware/HWComposer.h"
63
64#include <private/android_filesystem_config.h>
65#include <private/gui/SharedBufferStack.h>
66
67#define EGL_VERSION_HW_ANDROID  0x3143
68
69#define DISPLAY_COUNT       1
70
71namespace android {
72// ---------------------------------------------------------------------------
73
74const String16 sHardwareTest("android.permission.HARDWARE_TEST");
75const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
76const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
77const String16 sDump("android.permission.DUMP");
78
79// ---------------------------------------------------------------------------
80
81SurfaceFlinger::SurfaceFlinger()
82    :   BnSurfaceComposer(), Thread(false),
83        mTransactionFlags(0),
84        mTransationPending(false),
85        mLayersRemoved(false),
86        mBootTime(systemTime()),
87        mVisibleRegionsDirty(false),
88        mHwWorkListDirty(false),
89        mElectronBeamAnimationMode(0),
90        mDebugRegion(0),
91        mDebugBackground(0),
92        mDebugDDMS(0),
93        mDebugDisableHWC(0),
94        mDebugDisableTransformHint(0),
95        mDebugInSwapBuffers(0),
96        mLastSwapBufferTime(0),
97        mDebugInTransaction(0),
98        mLastTransactionTime(0),
99        mBootFinished(false),
100        mConsoleSignals(0),
101        mSecureFrameBuffer(0)
102{
103    init();
104}
105
106void SurfaceFlinger::init()
107{
108    ALOGI("SurfaceFlinger is starting");
109
110    // debugging stuff...
111    char value[PROPERTY_VALUE_MAX];
112
113    property_get("debug.sf.showupdates", value, "0");
114    mDebugRegion = atoi(value);
115
116    property_get("debug.sf.showbackground", value, "0");
117    mDebugBackground = atoi(value);
118
119#ifdef DDMS_DEBUGGING
120    property_get("debug.sf.ddms", value, "0");
121    mDebugDDMS = atoi(value);
122    if (mDebugDDMS) {
123        DdmConnection::start(getServiceName());
124    }
125#endif
126
127    ALOGI_IF(mDebugRegion,       "showupdates enabled");
128    ALOGI_IF(mDebugBackground,   "showbackground enabled");
129    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
130}
131
132void SurfaceFlinger::onFirstRef()
133{
134    mEventQueue.init(this);
135
136    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
137
138    // Wait for the main thread to be done with its initialization
139    mReadyToRunBarrier.wait();
140}
141
142
143SurfaceFlinger::~SurfaceFlinger()
144{
145    glDeleteTextures(1, &mWormholeTexName);
146}
147
148void SurfaceFlinger::binderDied(const wp<IBinder>& who)
149{
150    // the window manager died on us. prepare its eulogy.
151
152    // reset screen orientation
153    Vector<ComposerState> state;
154    setTransactionState(state, eOrientationDefault, 0);
155
156    // restart the boot-animation
157    property_set("ctl.start", "bootanim");
158}
159
160sp<IMemoryHeap> SurfaceFlinger::getCblk() const
161{
162    return mServerHeap;
163}
164
165sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
166{
167    sp<ISurfaceComposerClient> bclient;
168    sp<Client> client(new Client(this));
169    status_t err = client->initCheck();
170    if (err == NO_ERROR) {
171        bclient = client;
172    }
173    return bclient;
174}
175
176sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
177{
178    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
179    return gba;
180}
181
182const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
183{
184    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
185    const GraphicPlane& plane(mGraphicPlanes[dpy]);
186    return plane;
187}
188
189GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
190{
191    return const_cast<GraphicPlane&>(
192        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
193}
194
195void SurfaceFlinger::bootFinished()
196{
197    const nsecs_t now = systemTime();
198    const nsecs_t duration = now - mBootTime;
199    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
200    mBootFinished = true;
201
202    // wait patiently for the window manager death
203    const String16 name("window");
204    sp<IBinder> window(defaultServiceManager()->getService(name));
205    if (window != 0) {
206        window->linkToDeath(this);
207    }
208
209    // stop boot animation
210    property_set("ctl.stop", "bootanim");
211}
212
213static inline uint16_t pack565(int r, int g, int b) {
214    return (r<<11)|(g<<5)|b;
215}
216
217status_t SurfaceFlinger::readyToRun()
218{
219    ALOGI(   "SurfaceFlinger's main thread ready to run. "
220            "Initializing graphics H/W...");
221
222    // we only support one display currently
223    int dpy = 0;
224
225    {
226        // initialize the main display
227        GraphicPlane& plane(graphicPlane(dpy));
228        DisplayHardware* const hw = new DisplayHardware(this, dpy);
229        plane.setDisplayHardware(hw);
230    }
231
232    // create the shared control-block
233    mServerHeap = new MemoryHeapBase(4096,
234            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
235    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
236
237    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
238    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
239
240    new(mServerCblk) surface_flinger_cblk_t;
241
242    // initialize primary screen
243    // (other display should be initialized in the same manner, but
244    // asynchronously, as they could come and go. None of this is supported
245    // yet).
246    const GraphicPlane& plane(graphicPlane(dpy));
247    const DisplayHardware& hw = plane.displayHardware();
248    const uint32_t w = hw.getWidth();
249    const uint32_t h = hw.getHeight();
250    const uint32_t f = hw.getFormat();
251    hw.makeCurrent();
252
253    // initialize the shared control block
254    mServerCblk->connected |= 1<<dpy;
255    display_cblk_t* dcblk = mServerCblk->displays + dpy;
256    memset(dcblk, 0, sizeof(display_cblk_t));
257    dcblk->w            = plane.getWidth();
258    dcblk->h            = plane.getHeight();
259    dcblk->format       = f;
260    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
261    dcblk->xdpi         = hw.getDpiX();
262    dcblk->ydpi         = hw.getDpiY();
263    dcblk->fps          = hw.getRefreshRate();
264    dcblk->density      = hw.getDensity();
265
266    // Initialize OpenGL|ES
267    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
268    glPixelStorei(GL_PACK_ALIGNMENT, 4);
269    glEnableClientState(GL_VERTEX_ARRAY);
270    glEnable(GL_SCISSOR_TEST);
271    glShadeModel(GL_FLAT);
272    glDisable(GL_DITHER);
273    glDisable(GL_CULL_FACE);
274
275    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
276    const uint16_t g1 = pack565(0x17,0x2f,0x17);
277    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
278    glGenTextures(1, &mWormholeTexName);
279    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
284    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
285            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
286
287    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
288    glGenTextures(1, &mProtectedTexName);
289    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
292    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
293    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
294    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
295            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
296
297    glViewport(0, 0, w, h);
298    glMatrixMode(GL_PROJECTION);
299    glLoadIdentity();
300    // put the origin in the left-bottom corner
301    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
302
303
304    // start the EventThread
305    mEventThread = new EventThread(this);
306    mEventQueue.setEventThread(mEventThread);
307    hw.startSleepManagement();
308
309    /*
310     *  We're now ready to accept clients...
311     */
312
313    mReadyToRunBarrier.open();
314
315    // start boot animation
316    property_set("ctl.start", "bootanim");
317
318    return NO_ERROR;
319}
320
321// ----------------------------------------------------------------------------
322
323bool SurfaceFlinger::authenticateSurfaceTexture(
324        const sp<ISurfaceTexture>& surfaceTexture) const {
325    Mutex::Autolock _l(mStateLock);
326    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
327
328    // Check the visible layer list for the ISurface
329    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
330    size_t count = currentLayers.size();
331    for (size_t i=0 ; i<count ; i++) {
332        const sp<LayerBase>& layer(currentLayers[i]);
333        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
334        if (lbc != NULL) {
335            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
336            if (lbcBinder == surfaceTextureBinder) {
337                return true;
338            }
339        }
340    }
341
342    // Check the layers in the purgatory.  This check is here so that if a
343    // SurfaceTexture gets destroyed before all the clients are done using it,
344    // the error will not be reported as "surface XYZ is not authenticated", but
345    // will instead fail later on when the client tries to use the surface,
346    // which should be reported as "surface XYZ returned an -ENODEV".  The
347    // purgatorized layers are no less authentic than the visible ones, so this
348    // should not cause any harm.
349    size_t purgatorySize =  mLayerPurgatory.size();
350    for (size_t i=0 ; i<purgatorySize ; i++) {
351        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
352        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
353        if (lbc != NULL) {
354            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
355            if (lbcBinder == surfaceTextureBinder) {
356                return true;
357            }
358        }
359    }
360
361    return false;
362}
363
364// ----------------------------------------------------------------------------
365
366sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
367    return mEventThread->createEventConnection();
368}
369
370// ----------------------------------------------------------------------------
371
372void SurfaceFlinger::waitForEvent() {
373    mEventQueue.waitMessage();
374}
375
376void SurfaceFlinger::signalTransaction() {
377    mEventQueue.invalidate();
378}
379
380void SurfaceFlinger::signalLayerUpdate() {
381    mEventQueue.invalidate();
382}
383
384void SurfaceFlinger::signalRefresh() {
385    mEventQueue.refresh();
386}
387
388status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
389        nsecs_t reltime, uint32_t flags) {
390    return mEventQueue.postMessage(msg, reltime);
391}
392
393status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
394        nsecs_t reltime, uint32_t flags) {
395    status_t res = mEventQueue.postMessage(msg, reltime);
396    if (res == NO_ERROR) {
397        msg->wait();
398    }
399    return res;
400}
401
402bool SurfaceFlinger::threadLoop()
403{
404    waitForEvent();
405    return true;
406}
407
408void SurfaceFlinger::onMessageReceived(int32_t what)
409{
410    ATRACE_CALL();
411    switch (what) {
412        case MessageQueue::REFRESH: {
413//        case MessageQueue::INVALIDATE: {
414            // check for transactions
415            if (CC_UNLIKELY(mConsoleSignals)) {
416                handleConsoleEvents();
417            }
418
419            // if we're in a global transaction, don't do anything.
420            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
421            uint32_t transactionFlags = peekTransactionFlags(mask);
422            if (CC_UNLIKELY(transactionFlags)) {
423                handleTransaction(transactionFlags);
424            }
425
426            // post surfaces (if needed)
427            handlePageFlip();
428
429//            signalRefresh();
430//
431//        } break;
432//
433//        case MessageQueue::REFRESH: {
434
435            handleRefresh();
436
437            const DisplayHardware& hw(graphicPlane(0).displayHardware());
438
439//            if (mDirtyRegion.isEmpty()) {
440//                return;
441//            }
442
443            if (CC_UNLIKELY(mHwWorkListDirty)) {
444                // build the h/w work list
445                handleWorkList();
446            }
447
448            if (CC_LIKELY(hw.canDraw())) {
449                // repaint the framebuffer (if needed)
450                handleRepaint();
451                // inform the h/w that we're done compositing
452                hw.compositionComplete();
453                postFramebuffer();
454            } else {
455                // pretend we did the post
456                hw.compositionComplete();
457            }
458
459        } break;
460    }
461}
462
463void SurfaceFlinger::postFramebuffer()
464{
465    ATRACE_CALL();
466    // mSwapRegion can be empty here is some cases, for instance if a hidden
467    // or fully transparent window is updating.
468    // in that case, we need to flip anyways to not risk a deadlock with
469    // h/w composer.
470
471    const DisplayHardware& hw(graphicPlane(0).displayHardware());
472    const nsecs_t now = systemTime();
473    mDebugInSwapBuffers = now;
474    hw.flip(mSwapRegion);
475
476    size_t numLayers = mVisibleLayersSortedByZ.size();
477    for (size_t i = 0; i < numLayers; i++) {
478        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
479    }
480
481    mLastSwapBufferTime = systemTime() - now;
482    mDebugInSwapBuffers = 0;
483    mSwapRegion.clear();
484}
485
486void SurfaceFlinger::handleConsoleEvents()
487{
488    // something to do with the console
489    const DisplayHardware& hw = graphicPlane(0).displayHardware();
490
491    int what = android_atomic_and(0, &mConsoleSignals);
492    if (what & eConsoleAcquired) {
493        hw.acquireScreen();
494        // this is a temporary work-around, eventually this should be called
495        // by the power-manager
496        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
497    }
498
499    if (what & eConsoleReleased) {
500        if (hw.isScreenAcquired()) {
501            hw.releaseScreen();
502        }
503    }
504
505    mDirtyRegion.set(hw.bounds());
506}
507
508void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
509{
510    ATRACE_CALL();
511
512    Mutex::Autolock _l(mStateLock);
513    const nsecs_t now = systemTime();
514    mDebugInTransaction = now;
515
516    // Here we're guaranteed that some transaction flags are set
517    // so we can call handleTransactionLocked() unconditionally.
518    // We call getTransactionFlags(), which will also clear the flags,
519    // with mStateLock held to guarantee that mCurrentState won't change
520    // until the transaction is committed.
521
522    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
523    transactionFlags = getTransactionFlags(mask);
524    handleTransactionLocked(transactionFlags);
525
526    mLastTransactionTime = systemTime() - now;
527    mDebugInTransaction = 0;
528    invalidateHwcGeometry();
529    // here the transaction has been committed
530}
531
532void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
533{
534    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
535    const size_t count = currentLayers.size();
536
537    /*
538     * Traversal of the children
539     * (perform the transaction for each of them if needed)
540     */
541
542    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
543    if (layersNeedTransaction) {
544        for (size_t i=0 ; i<count ; i++) {
545            const sp<LayerBase>& layer = currentLayers[i];
546            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
547            if (!trFlags) continue;
548
549            const uint32_t flags = layer->doTransaction(0);
550            if (flags & Layer::eVisibleRegion)
551                mVisibleRegionsDirty = true;
552        }
553    }
554
555    /*
556     * Perform our own transaction if needed
557     */
558
559    if (transactionFlags & eTransactionNeeded) {
560        if (mCurrentState.orientation != mDrawingState.orientation) {
561            // the orientation has changed, recompute all visible regions
562            // and invalidate everything.
563
564            const int dpy = 0;
565            const int orientation = mCurrentState.orientation;
566            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
567            GraphicPlane& plane(graphicPlane(dpy));
568            plane.setOrientation(orientation);
569
570            // update the shared control block
571            const DisplayHardware& hw(plane.displayHardware());
572            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
573            dcblk->orientation = orientation;
574            dcblk->w = plane.getWidth();
575            dcblk->h = plane.getHeight();
576
577            mVisibleRegionsDirty = true;
578            mDirtyRegion.set(hw.bounds());
579        }
580
581        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
582            // layers have been added
583            mVisibleRegionsDirty = true;
584        }
585
586        // some layers might have been removed, so
587        // we need to update the regions they're exposing.
588        if (mLayersRemoved) {
589            mLayersRemoved = false;
590            mVisibleRegionsDirty = true;
591            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
592            const size_t count = previousLayers.size();
593            for (size_t i=0 ; i<count ; i++) {
594                const sp<LayerBase>& layer(previousLayers[i]);
595                if (currentLayers.indexOf( layer ) < 0) {
596                    // this layer is not visible anymore
597                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
598                }
599            }
600        }
601    }
602
603    commitTransaction();
604}
605
606void SurfaceFlinger::computeVisibleRegions(
607    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
608{
609    ATRACE_CALL();
610
611    const GraphicPlane& plane(graphicPlane(0));
612    const Transform& planeTransform(plane.transform());
613    const DisplayHardware& hw(plane.displayHardware());
614    const Region screenRegion(hw.bounds());
615
616    Region aboveOpaqueLayers;
617    Region aboveCoveredLayers;
618    Region dirty;
619
620    bool secureFrameBuffer = false;
621
622    size_t i = currentLayers.size();
623    while (i--) {
624        const sp<LayerBase>& layer = currentLayers[i];
625        layer->validateVisibility(planeTransform);
626
627        // start with the whole surface at its current location
628        const Layer::State& s(layer->drawingState());
629
630        /*
631         * opaqueRegion: area of a surface that is fully opaque.
632         */
633        Region opaqueRegion;
634
635        /*
636         * visibleRegion: area of a surface that is visible on screen
637         * and not fully transparent. This is essentially the layer's
638         * footprint minus the opaque regions above it.
639         * Areas covered by a translucent surface are considered visible.
640         */
641        Region visibleRegion;
642
643        /*
644         * coveredRegion: area of a surface that is covered by all
645         * visible regions above it (which includes the translucent areas).
646         */
647        Region coveredRegion;
648
649
650        // handle hidden surfaces by setting the visible region to empty
651        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
652            const bool translucent = !layer->isOpaque();
653            const Rect bounds(layer->visibleBounds());
654            visibleRegion.set(bounds);
655            visibleRegion.andSelf(screenRegion);
656            if (!visibleRegion.isEmpty()) {
657                // Remove the transparent area from the visible region
658                if (translucent) {
659                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
660                }
661
662                // compute the opaque region
663                const int32_t layerOrientation = layer->getOrientation();
664                if (s.alpha==255 && !translucent &&
665                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
666                    // the opaque region is the layer's footprint
667                    opaqueRegion = visibleRegion;
668                }
669            }
670        }
671
672        // Clip the covered region to the visible region
673        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
674
675        // Update aboveCoveredLayers for next (lower) layer
676        aboveCoveredLayers.orSelf(visibleRegion);
677
678        // subtract the opaque region covered by the layers above us
679        visibleRegion.subtractSelf(aboveOpaqueLayers);
680
681        // compute this layer's dirty region
682        if (layer->contentDirty) {
683            // we need to invalidate the whole region
684            dirty = visibleRegion;
685            // as well, as the old visible region
686            dirty.orSelf(layer->visibleRegionScreen);
687            layer->contentDirty = false;
688        } else {
689            /* compute the exposed region:
690             *   the exposed region consists of two components:
691             *   1) what's VISIBLE now and was COVERED before
692             *   2) what's EXPOSED now less what was EXPOSED before
693             *
694             * note that (1) is conservative, we start with the whole
695             * visible region but only keep what used to be covered by
696             * something -- which mean it may have been exposed.
697             *
698             * (2) handles areas that were not covered by anything but got
699             * exposed because of a resize.
700             */
701            const Region newExposed = visibleRegion - coveredRegion;
702            const Region oldVisibleRegion = layer->visibleRegionScreen;
703            const Region oldCoveredRegion = layer->coveredRegionScreen;
704            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
705            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
706        }
707        dirty.subtractSelf(aboveOpaqueLayers);
708
709        // accumulate to the screen dirty region
710        dirtyRegion.orSelf(dirty);
711
712        // Update aboveOpaqueLayers for next (lower) layer
713        aboveOpaqueLayers.orSelf(opaqueRegion);
714
715        // Store the visible region is screen space
716        layer->setVisibleRegion(visibleRegion);
717        layer->setCoveredRegion(coveredRegion);
718
719        // If a secure layer is partially visible, lock-down the screen!
720        if (layer->isSecure() && !visibleRegion.isEmpty()) {
721            secureFrameBuffer = true;
722        }
723    }
724
725    // invalidate the areas where a layer was removed
726    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
727    mDirtyRegionRemovedLayer.clear();
728
729    mSecureFrameBuffer = secureFrameBuffer;
730    opaqueRegion = aboveOpaqueLayers;
731}
732
733
734void SurfaceFlinger::commitTransaction()
735{
736    if (!mLayersPendingRemoval.isEmpty()) {
737        // Notify removed layers now that they can't be drawn from
738        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
739            mLayersPendingRemoval[i]->onRemoved();
740        }
741        mLayersPendingRemoval.clear();
742    }
743
744    mDrawingState = mCurrentState;
745    mTransationPending = false;
746    mTransactionCV.broadcast();
747}
748
749void SurfaceFlinger::handlePageFlip()
750{
751    ATRACE_CALL();
752    const DisplayHardware& hw = graphicPlane(0).displayHardware();
753    const Region screenRegion(hw.bounds());
754
755    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
756    const bool visibleRegions = lockPageFlip(currentLayers);
757
758        if (visibleRegions || mVisibleRegionsDirty) {
759            Region opaqueRegion;
760            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
761
762            /*
763             *  rebuild the visible layer list
764             */
765            const size_t count = currentLayers.size();
766            mVisibleLayersSortedByZ.clear();
767            mVisibleLayersSortedByZ.setCapacity(count);
768            for (size_t i=0 ; i<count ; i++) {
769                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
770                    mVisibleLayersSortedByZ.add(currentLayers[i]);
771            }
772
773            mWormholeRegion = screenRegion.subtract(opaqueRegion);
774            mVisibleRegionsDirty = false;
775            invalidateHwcGeometry();
776        }
777
778    unlockPageFlip(currentLayers);
779
780    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
781    mDirtyRegion.andSelf(screenRegion);
782}
783
784void SurfaceFlinger::invalidateHwcGeometry()
785{
786    mHwWorkListDirty = true;
787}
788
789bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
790{
791    bool recomputeVisibleRegions = false;
792    size_t count = currentLayers.size();
793    sp<LayerBase> const* layers = currentLayers.array();
794    for (size_t i=0 ; i<count ; i++) {
795        const sp<LayerBase>& layer(layers[i]);
796        layer->lockPageFlip(recomputeVisibleRegions);
797    }
798    return recomputeVisibleRegions;
799}
800
801void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
802{
803    const GraphicPlane& plane(graphicPlane(0));
804    const Transform& planeTransform(plane.transform());
805    const size_t count = currentLayers.size();
806    sp<LayerBase> const* layers = currentLayers.array();
807    for (size_t i=0 ; i<count ; i++) {
808        const sp<LayerBase>& layer(layers[i]);
809        layer->unlockPageFlip(planeTransform, mDirtyRegion);
810    }
811}
812
813void SurfaceFlinger::handleRefresh()
814{
815    bool needInvalidate = false;
816    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
817    const size_t count = currentLayers.size();
818    for (size_t i=0 ; i<count ; i++) {
819        const sp<LayerBase>& layer(currentLayers[i]);
820        if (layer->onPreComposition()) {
821            needInvalidate = true;
822        }
823    }
824    if (needInvalidate) {
825        signalLayerUpdate();
826    }
827}
828
829
830void SurfaceFlinger::handleWorkList()
831{
832    mHwWorkListDirty = false;
833    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
834    if (hwc.initCheck() == NO_ERROR) {
835        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
836        const size_t count = currentLayers.size();
837        hwc.createWorkList(count);
838        hwc_layer_t* const cur(hwc.getLayers());
839        for (size_t i=0 ; cur && i<count ; i++) {
840            currentLayers[i]->setGeometry(&cur[i]);
841            if (mDebugDisableHWC || mDebugRegion) {
842                cur[i].compositionType = HWC_FRAMEBUFFER;
843                cur[i].flags |= HWC_SKIP_LAYER;
844            }
845        }
846    }
847}
848
849void SurfaceFlinger::handleRepaint()
850{
851    ATRACE_CALL();
852
853    // compute the invalid region
854    mSwapRegion.orSelf(mDirtyRegion);
855
856    if (CC_UNLIKELY(mDebugRegion)) {
857        debugFlashRegions();
858    }
859
860    // set the frame buffer
861    const DisplayHardware& hw(graphicPlane(0).displayHardware());
862    glMatrixMode(GL_MODELVIEW);
863    glLoadIdentity();
864
865    uint32_t flags = hw.getFlags();
866    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
867        (flags & DisplayHardware::BUFFER_PRESERVED))
868    {
869        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
870        // takes a rectangle, we must make sure to update that whole
871        // rectangle in that case
872        if (flags & DisplayHardware::SWAP_RECTANGLE) {
873            // TODO: we really should be able to pass a region to
874            // SWAP_RECTANGLE so that we don't have to redraw all this.
875            mDirtyRegion.set(mSwapRegion.bounds());
876        } else {
877            // in the BUFFER_PRESERVED case, obviously, we can update only
878            // what's needed and nothing more.
879            // NOTE: this is NOT a common case, as preserving the backbuffer
880            // is costly and usually involves copying the whole update back.
881        }
882    } else {
883        if (flags & DisplayHardware::PARTIAL_UPDATES) {
884            // We need to redraw the rectangle that will be updated
885            // (pushed to the framebuffer).
886            // This is needed because PARTIAL_UPDATES only takes one
887            // rectangle instead of a region (see DisplayHardware::flip())
888            mDirtyRegion.set(mSwapRegion.bounds());
889        } else {
890            // we need to redraw everything (the whole screen)
891            mDirtyRegion.set(hw.bounds());
892            mSwapRegion = mDirtyRegion;
893        }
894    }
895
896    setupHardwareComposer(mDirtyRegion);
897    composeSurfaces(mDirtyRegion);
898
899    // update the swap region and clear the dirty region
900    mSwapRegion.orSelf(mDirtyRegion);
901    mDirtyRegion.clear();
902}
903
904void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
905{
906    const DisplayHardware& hw(graphicPlane(0).displayHardware());
907    HWComposer& hwc(hw.getHwComposer());
908    hwc_layer_t* const cur(hwc.getLayers());
909    if (!cur) {
910        return;
911    }
912
913    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
914    size_t count = layers.size();
915
916    ALOGE_IF(hwc.getNumLayers() != count,
917            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
918            hwc.getNumLayers(), count);
919
920    // just to be extra-safe, use the smallest count
921    if (hwc.initCheck() == NO_ERROR) {
922        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
923    }
924
925    /*
926     *  update the per-frame h/w composer data for each layer
927     *  and build the transparent region of the FB
928     */
929    for (size_t i=0 ; i<count ; i++) {
930        const sp<LayerBase>& layer(layers[i]);
931        layer->setPerFrameData(&cur[i]);
932    }
933    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
934    status_t err = hwc.prepare();
935    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
936
937    if (err == NO_ERROR) {
938        // what's happening here is tricky.
939        // we want to clear all the layers with the CLEAR_FB flags
940        // that are opaque.
941        // however, since some GPU are efficient at preserving
942        // the backbuffer, we want to take advantage of that so we do the
943        // clear only in the dirty region (other areas will be preserved
944        // on those GPUs).
945        //   NOTE: on non backbuffer preserving GPU, the dirty region
946        //   has already been expanded as needed, so the code is correct
947        //   there too.
948        //
949        // However, the content of the framebuffer cannot be trusted when
950        // we switch to/from FB/OVERLAY, in which case we need to
951        // expand the dirty region to those areas too.
952        //
953        // Note also that there is a special case when switching from
954        // "no layers in FB" to "some layers in FB", where we need to redraw
955        // the entire FB, since some areas might contain uninitialized
956        // data.
957        //
958        // Also we want to make sure to not clear areas that belong to
959        // layers above that won't redraw (we would just be erasing them),
960        // that is, we can't erase anything outside the dirty region.
961
962        Region transparent;
963
964        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
965            transparent.set(hw.getBounds());
966            dirtyInOut = transparent;
967        } else {
968            for (size_t i=0 ; i<count ; i++) {
969                const sp<LayerBase>& layer(layers[i]);
970                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
971                    transparent.orSelf(layer->visibleRegionScreen);
972                }
973                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
974                if (isOverlay != layer->isOverlay()) {
975                    // we transitioned to/from overlay, so add this layer
976                    // to the dirty region so the framebuffer can be either
977                    // cleared or redrawn.
978                    dirtyInOut.orSelf(layer->visibleRegionScreen);
979                }
980                layer->setOverlay(isOverlay);
981            }
982            // don't erase stuff outside the dirty region
983            transparent.andSelf(dirtyInOut);
984        }
985
986        /*
987         *  clear the area of the FB that need to be transparent
988         */
989        if (!transparent.isEmpty()) {
990            glClearColor(0,0,0,0);
991            Region::const_iterator it = transparent.begin();
992            Region::const_iterator const end = transparent.end();
993            const int32_t height = hw.getHeight();
994            while (it != end) {
995                const Rect& r(*it++);
996                const GLint sy = height - (r.top + r.height());
997                glScissor(r.left, sy, r.width(), r.height());
998                glClear(GL_COLOR_BUFFER_BIT);
999            }
1000        }
1001    }
1002}
1003
1004void SurfaceFlinger::composeSurfaces(const Region& dirty)
1005{
1006    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1007    HWComposer& hwc(hw.getHwComposer());
1008
1009    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
1010    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
1011        // should never happen unless the window manager has a bug
1012        // draw something...
1013        drawWormhole();
1014    }
1015
1016    /*
1017     * and then, render the layers targeted at the framebuffer
1018     */
1019
1020    hwc_layer_t* const cur(hwc.getLayers());
1021    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1022    size_t count = layers.size();
1023
1024
1025    // FIXME: workaround for b/6020860
1026    if (hw.getFlags() & DisplayHardware::BUFFER_PRESERVED) {
1027        for (size_t i=0 ; i<count ; i++) {
1028            if (cur && (cur[i].compositionType == HWC_FRAMEBUFFER)) {
1029                glEnable(GL_SCISSOR_TEST);
1030                glScissor(0,0,0,0);
1031                glClear(GL_COLOR_BUFFER_BIT);
1032                break;
1033            }
1034        }
1035    }
1036    // FIXME: bug6020860 for b/6020860
1037
1038
1039    for (size_t i=0 ; i<count ; i++) {
1040        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1041            continue;
1042        }
1043        const sp<LayerBase>& layer(layers[i]);
1044        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1045        if (!clip.isEmpty()) {
1046            layer->draw(clip);
1047        }
1048    }
1049}
1050
1051void SurfaceFlinger::debugFlashRegions()
1052{
1053    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1054    const uint32_t flags = hw.getFlags();
1055    const int32_t height = hw.getHeight();
1056    if (mSwapRegion.isEmpty()) {
1057        return;
1058    }
1059
1060    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1061            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1062        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1063                mDirtyRegion.bounds() : hw.bounds());
1064        composeSurfaces(repaint);
1065    }
1066
1067    glDisable(GL_TEXTURE_EXTERNAL_OES);
1068    glDisable(GL_TEXTURE_2D);
1069    glDisable(GL_BLEND);
1070    glDisable(GL_SCISSOR_TEST);
1071
1072    static int toggle = 0;
1073    toggle = 1 - toggle;
1074    if (toggle) {
1075        glColor4f(1, 0, 1, 1);
1076    } else {
1077        glColor4f(1, 1, 0, 1);
1078    }
1079
1080    Region::const_iterator it = mDirtyRegion.begin();
1081    Region::const_iterator const end = mDirtyRegion.end();
1082    while (it != end) {
1083        const Rect& r = *it++;
1084        GLfloat vertices[][2] = {
1085                { r.left,  height - r.top },
1086                { r.left,  height - r.bottom },
1087                { r.right, height - r.bottom },
1088                { r.right, height - r.top }
1089        };
1090        glVertexPointer(2, GL_FLOAT, 0, vertices);
1091        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1092    }
1093
1094    hw.flip(mSwapRegion);
1095
1096    if (mDebugRegion > 1)
1097        usleep(mDebugRegion * 1000);
1098
1099    glEnable(GL_SCISSOR_TEST);
1100}
1101
1102void SurfaceFlinger::drawWormhole() const
1103{
1104    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1105    if (region.isEmpty())
1106        return;
1107
1108    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1109    const int32_t width = hw.getWidth();
1110    const int32_t height = hw.getHeight();
1111
1112    if (CC_LIKELY(!mDebugBackground)) {
1113        glClearColor(0,0,0,0);
1114        Region::const_iterator it = region.begin();
1115        Region::const_iterator const end = region.end();
1116        while (it != end) {
1117            const Rect& r = *it++;
1118            const GLint sy = height - (r.top + r.height());
1119            glScissor(r.left, sy, r.width(), r.height());
1120            glClear(GL_COLOR_BUFFER_BIT);
1121        }
1122    } else {
1123        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1124                { width, height }, { 0, height }  };
1125        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1126
1127        glVertexPointer(2, GL_SHORT, 0, vertices);
1128        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1129        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1130
1131        glDisable(GL_TEXTURE_EXTERNAL_OES);
1132        glEnable(GL_TEXTURE_2D);
1133        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1134        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1135        glMatrixMode(GL_TEXTURE);
1136        glLoadIdentity();
1137
1138        glDisable(GL_BLEND);
1139
1140        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1141        Region::const_iterator it = region.begin();
1142        Region::const_iterator const end = region.end();
1143        while (it != end) {
1144            const Rect& r = *it++;
1145            const GLint sy = height - (r.top + r.height());
1146            glScissor(r.left, sy, r.width(), r.height());
1147            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1148        }
1149        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1150        glDisable(GL_TEXTURE_2D);
1151        glLoadIdentity();
1152        glMatrixMode(GL_MODELVIEW);
1153    }
1154}
1155
1156status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1157{
1158    Mutex::Autolock _l(mStateLock);
1159    addLayer_l(layer);
1160    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1161    return NO_ERROR;
1162}
1163
1164status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1165{
1166    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1167    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1168}
1169
1170ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1171        const sp<LayerBaseClient>& lbc)
1172{
1173    // attach this layer to the client
1174    size_t name = client->attachLayer(lbc);
1175
1176    Mutex::Autolock _l(mStateLock);
1177
1178    // add this layer to the current state list
1179    addLayer_l(lbc);
1180
1181    return ssize_t(name);
1182}
1183
1184status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1185{
1186    Mutex::Autolock _l(mStateLock);
1187    status_t err = purgatorizeLayer_l(layer);
1188    if (err == NO_ERROR)
1189        setTransactionFlags(eTransactionNeeded);
1190    return err;
1191}
1192
1193status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1194{
1195    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1196    if (lbc != 0) {
1197        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1198    }
1199    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1200    if (index >= 0) {
1201        mLayersRemoved = true;
1202        return NO_ERROR;
1203    }
1204    return status_t(index);
1205}
1206
1207status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1208{
1209    // First add the layer to the purgatory list, which makes sure it won't
1210    // go away, then remove it from the main list (through a transaction).
1211    ssize_t err = removeLayer_l(layerBase);
1212    if (err >= 0) {
1213        mLayerPurgatory.add(layerBase);
1214    }
1215
1216    mLayersPendingRemoval.push(layerBase);
1217
1218    // it's possible that we don't find a layer, because it might
1219    // have been destroyed already -- this is not technically an error
1220    // from the user because there is a race between Client::destroySurface(),
1221    // ~Client() and ~ISurface().
1222    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1223}
1224
1225status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1226{
1227    layer->forceVisibilityTransaction();
1228    setTransactionFlags(eTraversalNeeded);
1229    return NO_ERROR;
1230}
1231
1232uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1233{
1234    return android_atomic_release_load(&mTransactionFlags);
1235}
1236
1237uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1238{
1239    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1240}
1241
1242uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1243{
1244    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1245    if ((old & flags)==0) { // wake the server up
1246        signalTransaction();
1247    }
1248    return old;
1249}
1250
1251
1252void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1253        int orientation, uint32_t flags) {
1254    Mutex::Autolock _l(mStateLock);
1255
1256    uint32_t transactionFlags = 0;
1257    if (mCurrentState.orientation != orientation) {
1258        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1259            mCurrentState.orientation = orientation;
1260            transactionFlags |= eTransactionNeeded;
1261        } else if (orientation != eOrientationUnchanged) {
1262            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1263                    orientation);
1264        }
1265    }
1266
1267    const size_t count = state.size();
1268    for (size_t i=0 ; i<count ; i++) {
1269        const ComposerState& s(state[i]);
1270        sp<Client> client( static_cast<Client *>(s.client.get()) );
1271        transactionFlags |= setClientStateLocked(client, s.state);
1272    }
1273
1274    if (transactionFlags) {
1275        // this triggers the transaction
1276        setTransactionFlags(transactionFlags);
1277
1278        // if this is a synchronous transaction, wait for it to take effect
1279        // before returning.
1280        if (flags & eSynchronous) {
1281            mTransationPending = true;
1282        }
1283        while (mTransationPending) {
1284            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1285            if (CC_UNLIKELY(err != NO_ERROR)) {
1286                // just in case something goes wrong in SF, return to the
1287                // called after a few seconds.
1288                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1289                mTransationPending = false;
1290                break;
1291            }
1292        }
1293    }
1294}
1295
1296sp<ISurface> SurfaceFlinger::createSurface(
1297        ISurfaceComposerClient::surface_data_t* params,
1298        const String8& name,
1299        const sp<Client>& client,
1300        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1301        uint32_t flags)
1302{
1303    sp<LayerBaseClient> layer;
1304    sp<ISurface> surfaceHandle;
1305
1306    if (int32_t(w|h) < 0) {
1307        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1308                int(w), int(h));
1309        return surfaceHandle;
1310    }
1311
1312    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1313    sp<Layer> normalLayer;
1314    switch (flags & eFXSurfaceMask) {
1315        case eFXSurfaceNormal:
1316            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1317            layer = normalLayer;
1318            break;
1319        case eFXSurfaceBlur:
1320            // for now we treat Blur as Dim, until we can implement it
1321            // efficiently.
1322        case eFXSurfaceDim:
1323            layer = createDimSurface(client, d, w, h, flags);
1324            break;
1325        case eFXSurfaceScreenshot:
1326            layer = createScreenshotSurface(client, d, w, h, flags);
1327            break;
1328    }
1329
1330    if (layer != 0) {
1331        layer->initStates(w, h, flags);
1332        layer->setName(name);
1333        ssize_t token = addClientLayer(client, layer);
1334
1335        surfaceHandle = layer->getSurface();
1336        if (surfaceHandle != 0) {
1337            params->token = token;
1338            params->identity = layer->getIdentity();
1339            if (normalLayer != 0) {
1340                Mutex::Autolock _l(mStateLock);
1341                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1342            }
1343        }
1344
1345        setTransactionFlags(eTransactionNeeded);
1346    }
1347
1348    return surfaceHandle;
1349}
1350
1351sp<Layer> SurfaceFlinger::createNormalSurface(
1352        const sp<Client>& client, DisplayID display,
1353        uint32_t w, uint32_t h, uint32_t flags,
1354        PixelFormat& format)
1355{
1356    // initialize the surfaces
1357    switch (format) { // TODO: take h/w into account
1358    case PIXEL_FORMAT_TRANSPARENT:
1359    case PIXEL_FORMAT_TRANSLUCENT:
1360        format = PIXEL_FORMAT_RGBA_8888;
1361        break;
1362    case PIXEL_FORMAT_OPAQUE:
1363#ifdef NO_RGBX_8888
1364        format = PIXEL_FORMAT_RGB_565;
1365#else
1366        format = PIXEL_FORMAT_RGBX_8888;
1367#endif
1368        break;
1369    }
1370
1371#ifdef NO_RGBX_8888
1372    if (format == PIXEL_FORMAT_RGBX_8888)
1373        format = PIXEL_FORMAT_RGBA_8888;
1374#endif
1375
1376    sp<Layer> layer = new Layer(this, display, client);
1377    status_t err = layer->setBuffers(w, h, format, flags);
1378    if (CC_LIKELY(err != NO_ERROR)) {
1379        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1380        layer.clear();
1381    }
1382    return layer;
1383}
1384
1385sp<LayerDim> SurfaceFlinger::createDimSurface(
1386        const sp<Client>& client, DisplayID display,
1387        uint32_t w, uint32_t h, uint32_t flags)
1388{
1389    sp<LayerDim> layer = new LayerDim(this, display, client);
1390    return layer;
1391}
1392
1393sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1394        const sp<Client>& client, DisplayID display,
1395        uint32_t w, uint32_t h, uint32_t flags)
1396{
1397    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1398    return layer;
1399}
1400
1401status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1402{
1403    /*
1404     * called by the window manager, when a surface should be marked for
1405     * destruction.
1406     *
1407     * The surface is removed from the current and drawing lists, but placed
1408     * in the purgatory queue, so it's not destroyed right-away (we need
1409     * to wait for all client's references to go away first).
1410     */
1411
1412    status_t err = NAME_NOT_FOUND;
1413    Mutex::Autolock _l(mStateLock);
1414    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1415
1416    if (layer != 0) {
1417        err = purgatorizeLayer_l(layer);
1418        if (err == NO_ERROR) {
1419            setTransactionFlags(eTransactionNeeded);
1420        }
1421    }
1422    return err;
1423}
1424
1425status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1426{
1427    // called by ~ISurface() when all references are gone
1428    status_t err = NO_ERROR;
1429    sp<LayerBaseClient> l(layer.promote());
1430    if (l != NULL) {
1431        Mutex::Autolock _l(mStateLock);
1432        err = removeLayer_l(l);
1433        if (err == NAME_NOT_FOUND) {
1434            // The surface wasn't in the current list, which means it was
1435            // removed already, which means it is in the purgatory,
1436            // and need to be removed from there.
1437            ssize_t idx = mLayerPurgatory.remove(l);
1438            ALOGE_IF(idx < 0,
1439                    "layer=%p is not in the purgatory list", l.get());
1440        }
1441        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1442                "error removing layer=%p (%s)", l.get(), strerror(-err));
1443    }
1444    return err;
1445}
1446
1447uint32_t SurfaceFlinger::setClientStateLocked(
1448        const sp<Client>& client,
1449        const layer_state_t& s)
1450{
1451    uint32_t flags = 0;
1452    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1453    if (layer != 0) {
1454        const uint32_t what = s.what;
1455        if (what & ePositionChanged) {
1456            if (layer->setPosition(s.x, s.y))
1457                flags |= eTraversalNeeded;
1458        }
1459        if (what & eLayerChanged) {
1460            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1461            if (layer->setLayer(s.z)) {
1462                mCurrentState.layersSortedByZ.removeAt(idx);
1463                mCurrentState.layersSortedByZ.add(layer);
1464                // we need traversal (state changed)
1465                // AND transaction (list changed)
1466                flags |= eTransactionNeeded|eTraversalNeeded;
1467            }
1468        }
1469        if (what & eSizeChanged) {
1470            if (layer->setSize(s.w, s.h)) {
1471                flags |= eTraversalNeeded;
1472            }
1473        }
1474        if (what & eAlphaChanged) {
1475            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1476                flags |= eTraversalNeeded;
1477        }
1478        if (what & eMatrixChanged) {
1479            if (layer->setMatrix(s.matrix))
1480                flags |= eTraversalNeeded;
1481        }
1482        if (what & eTransparentRegionChanged) {
1483            if (layer->setTransparentRegionHint(s.transparentRegion))
1484                flags |= eTraversalNeeded;
1485        }
1486        if (what & eVisibilityChanged) {
1487            if (layer->setFlags(s.flags, s.mask))
1488                flags |= eTraversalNeeded;
1489        }
1490    }
1491    return flags;
1492}
1493
1494void SurfaceFlinger::screenReleased(int dpy)
1495{
1496    // this may be called by a signal handler, we can't do too much in here
1497    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1498    signalTransaction();
1499}
1500
1501void SurfaceFlinger::screenAcquired(int dpy)
1502{
1503    // this may be called by a signal handler, we can't do too much in here
1504    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1505    signalTransaction();
1506}
1507
1508status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1509{
1510    const size_t SIZE = 4096;
1511    char buffer[SIZE];
1512    String8 result;
1513
1514    if (!PermissionCache::checkCallingPermission(sDump)) {
1515        snprintf(buffer, SIZE, "Permission Denial: "
1516                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1517                IPCThreadState::self()->getCallingPid(),
1518                IPCThreadState::self()->getCallingUid());
1519        result.append(buffer);
1520    } else {
1521        // Try to get the main lock, but don't insist if we can't
1522        // (this would indicate SF is stuck, but we want to be able to
1523        // print something in dumpsys).
1524        int retry = 3;
1525        while (mStateLock.tryLock()<0 && --retry>=0) {
1526            usleep(1000000);
1527        }
1528        const bool locked(retry >= 0);
1529        if (!locked) {
1530            snprintf(buffer, SIZE,
1531                    "SurfaceFlinger appears to be unresponsive, "
1532                    "dumping anyways (no locks held)\n");
1533            result.append(buffer);
1534        }
1535
1536        bool dumpAll = true;
1537        size_t index = 0;
1538        size_t numArgs = args.size();
1539        if (numArgs) {
1540            if ((index < numArgs) &&
1541                    (args[index] == String16("--list"))) {
1542                index++;
1543                listLayersLocked(args, index, result, buffer, SIZE);
1544                dumpAll = false;
1545            }
1546
1547            if ((index < numArgs) &&
1548                    (args[index] == String16("--latency"))) {
1549                index++;
1550                dumpStatsLocked(args, index, result, buffer, SIZE);
1551                dumpAll = false;
1552            }
1553
1554            if ((index < numArgs) &&
1555                    (args[index] == String16("--latency-clear"))) {
1556                index++;
1557                clearStatsLocked(args, index, result, buffer, SIZE);
1558                dumpAll = false;
1559            }
1560        }
1561
1562        if (dumpAll) {
1563            dumpAllLocked(result, buffer, SIZE);
1564        }
1565
1566        if (locked) {
1567            mStateLock.unlock();
1568        }
1569    }
1570    write(fd, result.string(), result.size());
1571    return NO_ERROR;
1572}
1573
1574void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1575        String8& result, char* buffer, size_t SIZE) const
1576{
1577    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1578    const size_t count = currentLayers.size();
1579    for (size_t i=0 ; i<count ; i++) {
1580        const sp<LayerBase>& layer(currentLayers[i]);
1581        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1582        result.append(buffer);
1583    }
1584}
1585
1586void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1587        String8& result, char* buffer, size_t SIZE) const
1588{
1589    String8 name;
1590    if (index < args.size()) {
1591        name = String8(args[index]);
1592        index++;
1593    }
1594
1595    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1596    const size_t count = currentLayers.size();
1597    for (size_t i=0 ; i<count ; i++) {
1598        const sp<LayerBase>& layer(currentLayers[i]);
1599        if (name.isEmpty()) {
1600            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1601            result.append(buffer);
1602        }
1603        if (name.isEmpty() || (name == layer->getName())) {
1604            layer->dumpStats(result, buffer, SIZE);
1605        }
1606    }
1607}
1608
1609void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1610        String8& result, char* buffer, size_t SIZE) const
1611{
1612    String8 name;
1613    if (index < args.size()) {
1614        name = String8(args[index]);
1615        index++;
1616    }
1617
1618    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1619    const size_t count = currentLayers.size();
1620    for (size_t i=0 ; i<count ; i++) {
1621        const sp<LayerBase>& layer(currentLayers[i]);
1622        if (name.isEmpty() || (name == layer->getName())) {
1623            layer->clearStats();
1624        }
1625    }
1626}
1627
1628void SurfaceFlinger::dumpAllLocked(
1629        String8& result, char* buffer, size_t SIZE) const
1630{
1631    // figure out if we're stuck somewhere
1632    const nsecs_t now = systemTime();
1633    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1634    const nsecs_t inTransaction(mDebugInTransaction);
1635    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1636    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1637
1638    /*
1639     * Dump the visible layer list
1640     */
1641    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1642    const size_t count = currentLayers.size();
1643    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1644    result.append(buffer);
1645    for (size_t i=0 ; i<count ; i++) {
1646        const sp<LayerBase>& layer(currentLayers[i]);
1647        layer->dump(result, buffer, SIZE);
1648    }
1649
1650    /*
1651     * Dump the layers in the purgatory
1652     */
1653
1654    const size_t purgatorySize = mLayerPurgatory.size();
1655    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1656    result.append(buffer);
1657    for (size_t i=0 ; i<purgatorySize ; i++) {
1658        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1659        layer->shortDump(result, buffer, SIZE);
1660    }
1661
1662    /*
1663     * Dump SurfaceFlinger global state
1664     */
1665
1666    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1667    result.append(buffer);
1668
1669    const GLExtensions& extensions(GLExtensions::getInstance());
1670    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1671            extensions.getVendor(),
1672            extensions.getRenderer(),
1673            extensions.getVersion());
1674    result.append(buffer);
1675
1676    snprintf(buffer, SIZE, "EGL : %s\n",
1677            eglQueryString(graphicPlane(0).getEGLDisplay(),
1678                    EGL_VERSION_HW_ANDROID));
1679    result.append(buffer);
1680
1681    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1682    result.append(buffer);
1683
1684    mWormholeRegion.dump(result, "WormholeRegion");
1685    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1686    snprintf(buffer, SIZE,
1687            "  orientation=%d, canDraw=%d\n",
1688            mCurrentState.orientation, hw.canDraw());
1689    result.append(buffer);
1690    snprintf(buffer, SIZE,
1691            "  last eglSwapBuffers() time: %f us\n"
1692            "  last transaction time     : %f us\n"
1693            "  transaction-flags         : %08x\n"
1694            "  refresh-rate              : %f fps\n"
1695            "  x-dpi                     : %f\n"
1696            "  y-dpi                     : %f\n"
1697            "  density                   : %f\n",
1698            mLastSwapBufferTime/1000.0,
1699            mLastTransactionTime/1000.0,
1700            mTransactionFlags,
1701            hw.getRefreshRate(),
1702            hw.getDpiX(),
1703            hw.getDpiY(),
1704            hw.getDensity());
1705    result.append(buffer);
1706
1707    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1708            inSwapBuffersDuration/1000.0);
1709    result.append(buffer);
1710
1711    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1712            inTransactionDuration/1000.0);
1713    result.append(buffer);
1714
1715    /*
1716     * VSYNC state
1717     */
1718    mEventThread->dump(result, buffer, SIZE);
1719
1720    /*
1721     * Dump HWComposer state
1722     */
1723    HWComposer& hwc(hw.getHwComposer());
1724    snprintf(buffer, SIZE, "h/w composer state:\n");
1725    result.append(buffer);
1726    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1727            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1728                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1729    result.append(buffer);
1730    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1731
1732    /*
1733     * Dump gralloc state
1734     */
1735    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1736    alloc.dump(result);
1737    hw.dump(result);
1738}
1739
1740status_t SurfaceFlinger::onTransact(
1741    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1742{
1743    switch (code) {
1744        case CREATE_CONNECTION:
1745        case SET_TRANSACTION_STATE:
1746        case SET_ORIENTATION:
1747        case BOOT_FINISHED:
1748        case TURN_ELECTRON_BEAM_OFF:
1749        case TURN_ELECTRON_BEAM_ON:
1750        {
1751            // codes that require permission check
1752            IPCThreadState* ipc = IPCThreadState::self();
1753            const int pid = ipc->getCallingPid();
1754            const int uid = ipc->getCallingUid();
1755            if ((uid != AID_GRAPHICS) &&
1756                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1757                ALOGE("Permission Denial: "
1758                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1759                return PERMISSION_DENIED;
1760            }
1761            break;
1762        }
1763        case CAPTURE_SCREEN:
1764        {
1765            // codes that require permission check
1766            IPCThreadState* ipc = IPCThreadState::self();
1767            const int pid = ipc->getCallingPid();
1768            const int uid = ipc->getCallingUid();
1769            if ((uid != AID_GRAPHICS) &&
1770                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1771                ALOGE("Permission Denial: "
1772                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1773                return PERMISSION_DENIED;
1774            }
1775            break;
1776        }
1777    }
1778
1779    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1780    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1781        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1782        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1783            IPCThreadState* ipc = IPCThreadState::self();
1784            const int pid = ipc->getCallingPid();
1785            const int uid = ipc->getCallingUid();
1786            ALOGE("Permission Denial: "
1787                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1788            return PERMISSION_DENIED;
1789        }
1790        int n;
1791        switch (code) {
1792            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1793            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1794                return NO_ERROR;
1795            case 1002:  // SHOW_UPDATES
1796                n = data.readInt32();
1797                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1798                invalidateHwcGeometry();
1799                repaintEverything();
1800                return NO_ERROR;
1801            case 1003:  // SHOW_BACKGROUND
1802                n = data.readInt32();
1803                mDebugBackground = n ? 1 : 0;
1804                return NO_ERROR;
1805            case 1004:{ // repaint everything
1806                repaintEverything();
1807                return NO_ERROR;
1808            }
1809            case 1005:{ // force transaction
1810                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1811                return NO_ERROR;
1812            }
1813            case 1006:{ // send empty update
1814                signalRefresh();
1815                return NO_ERROR;
1816            }
1817            case 1008:  // toggle use of hw composer
1818                n = data.readInt32();
1819                mDebugDisableHWC = n ? 1 : 0;
1820                invalidateHwcGeometry();
1821                repaintEverything();
1822                return NO_ERROR;
1823            case 1009:  // toggle use of transform hint
1824                n = data.readInt32();
1825                mDebugDisableTransformHint = n ? 1 : 0;
1826                invalidateHwcGeometry();
1827                repaintEverything();
1828                return NO_ERROR;
1829            case 1010:  // interrogate.
1830                reply->writeInt32(0);
1831                reply->writeInt32(0);
1832                reply->writeInt32(mDebugRegion);
1833                reply->writeInt32(mDebugBackground);
1834                reply->writeInt32(mDebugDisableHWC);
1835                return NO_ERROR;
1836            case 1013: {
1837                Mutex::Autolock _l(mStateLock);
1838                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1839                reply->writeInt32(hw.getPageFlipCount());
1840            }
1841            return NO_ERROR;
1842        }
1843    }
1844    return err;
1845}
1846
1847void SurfaceFlinger::repaintEverything() {
1848    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1849    const Rect bounds(hw.getBounds());
1850    setInvalidateRegion(Region(bounds));
1851    signalTransaction();
1852}
1853
1854void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1855    Mutex::Autolock _l(mInvalidateLock);
1856    mInvalidateRegion = reg;
1857}
1858
1859Region SurfaceFlinger::getAndClearInvalidateRegion() {
1860    Mutex::Autolock _l(mInvalidateLock);
1861    Region reg(mInvalidateRegion);
1862    mInvalidateRegion.clear();
1863    return reg;
1864}
1865
1866// ---------------------------------------------------------------------------
1867
1868status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1869        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1870{
1871    Mutex::Autolock _l(mStateLock);
1872    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1873}
1874
1875status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1876        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1877{
1878    if (!GLExtensions::getInstance().haveFramebufferObject())
1879        return INVALID_OPERATION;
1880
1881    // get screen geometry
1882    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1883    const uint32_t hw_w = hw.getWidth();
1884    const uint32_t hw_h = hw.getHeight();
1885    GLfloat u = 1;
1886    GLfloat v = 1;
1887
1888    // make sure to clear all GL error flags
1889    while ( glGetError() != GL_NO_ERROR ) ;
1890
1891    // create a FBO
1892    GLuint name, tname;
1893    glGenTextures(1, &tname);
1894    glBindTexture(GL_TEXTURE_2D, tname);
1895    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1896            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1897    if (glGetError() != GL_NO_ERROR) {
1898        while ( glGetError() != GL_NO_ERROR ) ;
1899        GLint tw = (2 << (31 - clz(hw_w)));
1900        GLint th = (2 << (31 - clz(hw_h)));
1901        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1902                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1903        u = GLfloat(hw_w) / tw;
1904        v = GLfloat(hw_h) / th;
1905    }
1906    glGenFramebuffersOES(1, &name);
1907    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1908    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1909            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1910
1911    // redraw the screen entirely...
1912    glDisable(GL_TEXTURE_EXTERNAL_OES);
1913    glDisable(GL_TEXTURE_2D);
1914    glDisable(GL_SCISSOR_TEST);
1915    glClearColor(0,0,0,1);
1916    glClear(GL_COLOR_BUFFER_BIT);
1917    glEnable(GL_SCISSOR_TEST);
1918    glMatrixMode(GL_MODELVIEW);
1919    glLoadIdentity();
1920    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1921    const size_t count = layers.size();
1922    for (size_t i=0 ; i<count ; ++i) {
1923        const sp<LayerBase>& layer(layers[i]);
1924        layer->drawForSreenShot();
1925    }
1926
1927    hw.compositionComplete();
1928
1929    // back to main framebuffer
1930    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1931    glDisable(GL_SCISSOR_TEST);
1932    glDeleteFramebuffersOES(1, &name);
1933
1934    *textureName = tname;
1935    *uOut = u;
1936    *vOut = v;
1937    return NO_ERROR;
1938}
1939
1940// ---------------------------------------------------------------------------
1941
1942status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1943{
1944    // get screen geometry
1945    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1946    const uint32_t hw_w = hw.getWidth();
1947    const uint32_t hw_h = hw.getHeight();
1948    const Region screenBounds(hw.getBounds());
1949
1950    GLfloat u, v;
1951    GLuint tname;
1952    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1953    if (result != NO_ERROR) {
1954        return result;
1955    }
1956
1957    GLfloat vtx[8];
1958    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1959    glBindTexture(GL_TEXTURE_2D, tname);
1960    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1961    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1962    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1963    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1964    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1965    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1966    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1967    glVertexPointer(2, GL_FLOAT, 0, vtx);
1968
1969    /*
1970     * Texture coordinate mapping
1971     *
1972     *                 u
1973     *    1 +----------+---+
1974     *      |     |    |   |  image is inverted
1975     *      |     V    |   |  w.r.t. the texture
1976     *  1-v +----------+   |  coordinates
1977     *      |              |
1978     *      |              |
1979     *      |              |
1980     *    0 +--------------+
1981     *      0              1
1982     *
1983     */
1984
1985    class s_curve_interpolator {
1986        const float nbFrames, s, v;
1987    public:
1988        s_curve_interpolator(int nbFrames, float s)
1989        : nbFrames(1.0f / (nbFrames-1)), s(s),
1990          v(1.0f + expf(-s + 0.5f*s)) {
1991        }
1992        float operator()(int f) {
1993            const float x = f * nbFrames;
1994            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1995        }
1996    };
1997
1998    class v_stretch {
1999        const GLfloat hw_w, hw_h;
2000    public:
2001        v_stretch(uint32_t hw_w, uint32_t hw_h)
2002        : hw_w(hw_w), hw_h(hw_h) {
2003        }
2004        void operator()(GLfloat* vtx, float v) {
2005            const GLfloat w = hw_w + (hw_w * v);
2006            const GLfloat h = hw_h - (hw_h * v);
2007            const GLfloat x = (hw_w - w) * 0.5f;
2008            const GLfloat y = (hw_h - h) * 0.5f;
2009            vtx[0] = x;         vtx[1] = y;
2010            vtx[2] = x;         vtx[3] = y + h;
2011            vtx[4] = x + w;     vtx[5] = y + h;
2012            vtx[6] = x + w;     vtx[7] = y;
2013        }
2014    };
2015
2016    class h_stretch {
2017        const GLfloat hw_w, hw_h;
2018    public:
2019        h_stretch(uint32_t hw_w, uint32_t hw_h)
2020        : hw_w(hw_w), hw_h(hw_h) {
2021        }
2022        void operator()(GLfloat* vtx, float v) {
2023            const GLfloat w = hw_w - (hw_w * v);
2024            const GLfloat h = 1.0f;
2025            const GLfloat x = (hw_w - w) * 0.5f;
2026            const GLfloat y = (hw_h - h) * 0.5f;
2027            vtx[0] = x;         vtx[1] = y;
2028            vtx[2] = x;         vtx[3] = y + h;
2029            vtx[4] = x + w;     vtx[5] = y + h;
2030            vtx[6] = x + w;     vtx[7] = y;
2031        }
2032    };
2033
2034    // the full animation is 24 frames
2035    char value[PROPERTY_VALUE_MAX];
2036    property_get("debug.sf.electron_frames", value, "24");
2037    int nbFrames = (atoi(value) + 1) >> 1;
2038    if (nbFrames <= 0) // just in case
2039        nbFrames = 24;
2040
2041    s_curve_interpolator itr(nbFrames, 7.5f);
2042    s_curve_interpolator itg(nbFrames, 8.0f);
2043    s_curve_interpolator itb(nbFrames, 8.5f);
2044
2045    v_stretch vverts(hw_w, hw_h);
2046
2047    glMatrixMode(GL_TEXTURE);
2048    glLoadIdentity();
2049    glMatrixMode(GL_MODELVIEW);
2050    glLoadIdentity();
2051
2052    glEnable(GL_BLEND);
2053    glBlendFunc(GL_ONE, GL_ONE);
2054    for (int i=0 ; i<nbFrames ; i++) {
2055        float x, y, w, h;
2056        const float vr = itr(i);
2057        const float vg = itg(i);
2058        const float vb = itb(i);
2059
2060        // clear screen
2061        glColorMask(1,1,1,1);
2062        glClear(GL_COLOR_BUFFER_BIT);
2063        glEnable(GL_TEXTURE_2D);
2064
2065        // draw the red plane
2066        vverts(vtx, vr);
2067        glColorMask(1,0,0,1);
2068        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2069
2070        // draw the green plane
2071        vverts(vtx, vg);
2072        glColorMask(0,1,0,1);
2073        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2074
2075        // draw the blue plane
2076        vverts(vtx, vb);
2077        glColorMask(0,0,1,1);
2078        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2079
2080        // draw the white highlight (we use the last vertices)
2081        glDisable(GL_TEXTURE_2D);
2082        glColorMask(1,1,1,1);
2083        glColor4f(vg, vg, vg, 1);
2084        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2085        hw.flip(screenBounds);
2086    }
2087
2088    h_stretch hverts(hw_w, hw_h);
2089    glDisable(GL_BLEND);
2090    glDisable(GL_TEXTURE_2D);
2091    glColorMask(1,1,1,1);
2092    for (int i=0 ; i<nbFrames ; i++) {
2093        const float v = itg(i);
2094        hverts(vtx, v);
2095        glClear(GL_COLOR_BUFFER_BIT);
2096        glColor4f(1-v, 1-v, 1-v, 1);
2097        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2098        hw.flip(screenBounds);
2099    }
2100
2101    glColorMask(1,1,1,1);
2102    glEnable(GL_SCISSOR_TEST);
2103    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2104    glDeleteTextures(1, &tname);
2105    glDisable(GL_TEXTURE_2D);
2106    glDisable(GL_BLEND);
2107    return NO_ERROR;
2108}
2109
2110status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2111{
2112    status_t result = PERMISSION_DENIED;
2113
2114    if (!GLExtensions::getInstance().haveFramebufferObject())
2115        return INVALID_OPERATION;
2116
2117
2118    // get screen geometry
2119    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2120    const uint32_t hw_w = hw.getWidth();
2121    const uint32_t hw_h = hw.getHeight();
2122    const Region screenBounds(hw.bounds());
2123
2124    GLfloat u, v;
2125    GLuint tname;
2126    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2127    if (result != NO_ERROR) {
2128        return result;
2129    }
2130
2131    GLfloat vtx[8];
2132    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2133    glBindTexture(GL_TEXTURE_2D, tname);
2134    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2135    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2136    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2137    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2138    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2139    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2140    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2141    glVertexPointer(2, GL_FLOAT, 0, vtx);
2142
2143    class s_curve_interpolator {
2144        const float nbFrames, s, v;
2145    public:
2146        s_curve_interpolator(int nbFrames, float s)
2147        : nbFrames(1.0f / (nbFrames-1)), s(s),
2148          v(1.0f + expf(-s + 0.5f*s)) {
2149        }
2150        float operator()(int f) {
2151            const float x = f * nbFrames;
2152            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2153        }
2154    };
2155
2156    class v_stretch {
2157        const GLfloat hw_w, hw_h;
2158    public:
2159        v_stretch(uint32_t hw_w, uint32_t hw_h)
2160        : hw_w(hw_w), hw_h(hw_h) {
2161        }
2162        void operator()(GLfloat* vtx, float v) {
2163            const GLfloat w = hw_w + (hw_w * v);
2164            const GLfloat h = hw_h - (hw_h * v);
2165            const GLfloat x = (hw_w - w) * 0.5f;
2166            const GLfloat y = (hw_h - h) * 0.5f;
2167            vtx[0] = x;         vtx[1] = y;
2168            vtx[2] = x;         vtx[3] = y + h;
2169            vtx[4] = x + w;     vtx[5] = y + h;
2170            vtx[6] = x + w;     vtx[7] = y;
2171        }
2172    };
2173
2174    class h_stretch {
2175        const GLfloat hw_w, hw_h;
2176    public:
2177        h_stretch(uint32_t hw_w, uint32_t hw_h)
2178        : hw_w(hw_w), hw_h(hw_h) {
2179        }
2180        void operator()(GLfloat* vtx, float v) {
2181            const GLfloat w = hw_w - (hw_w * v);
2182            const GLfloat h = 1.0f;
2183            const GLfloat x = (hw_w - w) * 0.5f;
2184            const GLfloat y = (hw_h - h) * 0.5f;
2185            vtx[0] = x;         vtx[1] = y;
2186            vtx[2] = x;         vtx[3] = y + h;
2187            vtx[4] = x + w;     vtx[5] = y + h;
2188            vtx[6] = x + w;     vtx[7] = y;
2189        }
2190    };
2191
2192    // the full animation is 12 frames
2193    int nbFrames = 8;
2194    s_curve_interpolator itr(nbFrames, 7.5f);
2195    s_curve_interpolator itg(nbFrames, 8.0f);
2196    s_curve_interpolator itb(nbFrames, 8.5f);
2197
2198    h_stretch hverts(hw_w, hw_h);
2199    glDisable(GL_BLEND);
2200    glDisable(GL_TEXTURE_2D);
2201    glColorMask(1,1,1,1);
2202    for (int i=nbFrames-1 ; i>=0 ; i--) {
2203        const float v = itg(i);
2204        hverts(vtx, v);
2205        glClear(GL_COLOR_BUFFER_BIT);
2206        glColor4f(1-v, 1-v, 1-v, 1);
2207        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2208        hw.flip(screenBounds);
2209    }
2210
2211    nbFrames = 4;
2212    v_stretch vverts(hw_w, hw_h);
2213    glEnable(GL_BLEND);
2214    glBlendFunc(GL_ONE, GL_ONE);
2215    for (int i=nbFrames-1 ; i>=0 ; i--) {
2216        float x, y, w, h;
2217        const float vr = itr(i);
2218        const float vg = itg(i);
2219        const float vb = itb(i);
2220
2221        // clear screen
2222        glColorMask(1,1,1,1);
2223        glClear(GL_COLOR_BUFFER_BIT);
2224        glEnable(GL_TEXTURE_2D);
2225
2226        // draw the red plane
2227        vverts(vtx, vr);
2228        glColorMask(1,0,0,1);
2229        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2230
2231        // draw the green plane
2232        vverts(vtx, vg);
2233        glColorMask(0,1,0,1);
2234        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2235
2236        // draw the blue plane
2237        vverts(vtx, vb);
2238        glColorMask(0,0,1,1);
2239        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2240
2241        hw.flip(screenBounds);
2242    }
2243
2244    glColorMask(1,1,1,1);
2245    glEnable(GL_SCISSOR_TEST);
2246    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2247    glDeleteTextures(1, &tname);
2248    glDisable(GL_TEXTURE_2D);
2249    glDisable(GL_BLEND);
2250
2251    return NO_ERROR;
2252}
2253
2254// ---------------------------------------------------------------------------
2255
2256status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2257{
2258    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2259    if (!hw.canDraw()) {
2260        // we're already off
2261        return NO_ERROR;
2262    }
2263
2264    // turn off hwc while we're doing the animation
2265    hw.getHwComposer().disable();
2266    // and make sure to turn it back on (if needed) next time we compose
2267    invalidateHwcGeometry();
2268
2269    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2270        electronBeamOffAnimationImplLocked();
2271    }
2272
2273    // always clear the whole screen at the end of the animation
2274    glClearColor(0,0,0,1);
2275    glDisable(GL_SCISSOR_TEST);
2276    glClear(GL_COLOR_BUFFER_BIT);
2277    glEnable(GL_SCISSOR_TEST);
2278    hw.flip( Region(hw.bounds()) );
2279
2280    return NO_ERROR;
2281}
2282
2283status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2284{
2285    class MessageTurnElectronBeamOff : public MessageBase {
2286        SurfaceFlinger* flinger;
2287        int32_t mode;
2288        status_t result;
2289    public:
2290        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2291            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2292        }
2293        status_t getResult() const {
2294            return result;
2295        }
2296        virtual bool handler() {
2297            Mutex::Autolock _l(flinger->mStateLock);
2298            result = flinger->turnElectronBeamOffImplLocked(mode);
2299            return true;
2300        }
2301    };
2302
2303    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2304    status_t res = postMessageSync(msg);
2305    if (res == NO_ERROR) {
2306        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2307
2308        // work-around: when the power-manager calls us we activate the
2309        // animation. eventually, the "on" animation will be called
2310        // by the power-manager itself
2311        mElectronBeamAnimationMode = mode;
2312    }
2313    return res;
2314}
2315
2316// ---------------------------------------------------------------------------
2317
2318status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2319{
2320    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2321    if (hw.canDraw()) {
2322        // we're already on
2323        return NO_ERROR;
2324    }
2325    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2326        electronBeamOnAnimationImplLocked();
2327    }
2328
2329    // make sure to redraw the whole screen when the animation is done
2330    mDirtyRegion.set(hw.bounds());
2331    signalTransaction();
2332
2333    return NO_ERROR;
2334}
2335
2336status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2337{
2338    class MessageTurnElectronBeamOn : public MessageBase {
2339        SurfaceFlinger* flinger;
2340        int32_t mode;
2341        status_t result;
2342    public:
2343        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2344            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2345        }
2346        status_t getResult() const {
2347            return result;
2348        }
2349        virtual bool handler() {
2350            Mutex::Autolock _l(flinger->mStateLock);
2351            result = flinger->turnElectronBeamOnImplLocked(mode);
2352            return true;
2353        }
2354    };
2355
2356    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2357    return NO_ERROR;
2358}
2359
2360// ---------------------------------------------------------------------------
2361
2362status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2363        sp<IMemoryHeap>* heap,
2364        uint32_t* w, uint32_t* h, PixelFormat* f,
2365        uint32_t sw, uint32_t sh,
2366        uint32_t minLayerZ, uint32_t maxLayerZ)
2367{
2368    ATRACE_CALL();
2369
2370    status_t result = PERMISSION_DENIED;
2371
2372    // only one display supported for now
2373    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2374        return BAD_VALUE;
2375
2376    if (!GLExtensions::getInstance().haveFramebufferObject())
2377        return INVALID_OPERATION;
2378
2379    // get screen geometry
2380    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2381    const uint32_t hw_w = hw.getWidth();
2382    const uint32_t hw_h = hw.getHeight();
2383
2384    if ((sw > hw_w) || (sh > hw_h))
2385        return BAD_VALUE;
2386
2387    sw = (!sw) ? hw_w : sw;
2388    sh = (!sh) ? hw_h : sh;
2389    const size_t size = sw * sh * 4;
2390
2391    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2392    //        sw, sh, minLayerZ, maxLayerZ);
2393
2394    // make sure to clear all GL error flags
2395    while ( glGetError() != GL_NO_ERROR ) ;
2396
2397    // create a FBO
2398    GLuint name, tname;
2399    glGenRenderbuffersOES(1, &tname);
2400    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2401    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2402
2403    glGenFramebuffersOES(1, &name);
2404    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2405    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2406            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2407
2408    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2409
2410    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2411
2412        // invert everything, b/c glReadPixel() below will invert the FB
2413        glViewport(0, 0, sw, sh);
2414        glScissor(0, 0, sw, sh);
2415        glEnable(GL_SCISSOR_TEST);
2416        glMatrixMode(GL_PROJECTION);
2417        glPushMatrix();
2418        glLoadIdentity();
2419        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2420        glMatrixMode(GL_MODELVIEW);
2421
2422        // redraw the screen entirely...
2423        glClearColor(0,0,0,1);
2424        glClear(GL_COLOR_BUFFER_BIT);
2425
2426        const LayerVector& layers(mDrawingState.layersSortedByZ);
2427        const size_t count = layers.size();
2428        for (size_t i=0 ; i<count ; ++i) {
2429            const sp<LayerBase>& layer(layers[i]);
2430            const uint32_t flags = layer->drawingState().flags;
2431            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2432                const uint32_t z = layer->drawingState().z;
2433                if (z >= minLayerZ && z <= maxLayerZ) {
2434                    layer->drawForSreenShot();
2435                }
2436            }
2437        }
2438
2439        // XXX: this is needed on tegra
2440        glEnable(GL_SCISSOR_TEST);
2441        glScissor(0, 0, sw, sh);
2442
2443        // check for errors and return screen capture
2444        if (glGetError() != GL_NO_ERROR) {
2445            // error while rendering
2446            result = INVALID_OPERATION;
2447        } else {
2448            // allocate shared memory large enough to hold the
2449            // screen capture
2450            sp<MemoryHeapBase> base(
2451                    new MemoryHeapBase(size, 0, "screen-capture") );
2452            void* const ptr = base->getBase();
2453            if (ptr) {
2454                // capture the screen with glReadPixels()
2455                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2456                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2457                if (glGetError() == GL_NO_ERROR) {
2458                    *heap = base;
2459                    *w = sw;
2460                    *h = sh;
2461                    *f = PIXEL_FORMAT_RGBA_8888;
2462                    result = NO_ERROR;
2463                }
2464            } else {
2465                result = NO_MEMORY;
2466            }
2467        }
2468        glEnable(GL_SCISSOR_TEST);
2469        glViewport(0, 0, hw_w, hw_h);
2470        glMatrixMode(GL_PROJECTION);
2471        glPopMatrix();
2472        glMatrixMode(GL_MODELVIEW);
2473    } else {
2474        result = BAD_VALUE;
2475    }
2476
2477    // release FBO resources
2478    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2479    glDeleteRenderbuffersOES(1, &tname);
2480    glDeleteFramebuffersOES(1, &name);
2481
2482    hw.compositionComplete();
2483
2484    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2485
2486    return result;
2487}
2488
2489
2490status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2491        sp<IMemoryHeap>* heap,
2492        uint32_t* width, uint32_t* height, PixelFormat* format,
2493        uint32_t sw, uint32_t sh,
2494        uint32_t minLayerZ, uint32_t maxLayerZ)
2495{
2496    // only one display supported for now
2497    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2498        return BAD_VALUE;
2499
2500    if (!GLExtensions::getInstance().haveFramebufferObject())
2501        return INVALID_OPERATION;
2502
2503    class MessageCaptureScreen : public MessageBase {
2504        SurfaceFlinger* flinger;
2505        DisplayID dpy;
2506        sp<IMemoryHeap>* heap;
2507        uint32_t* w;
2508        uint32_t* h;
2509        PixelFormat* f;
2510        uint32_t sw;
2511        uint32_t sh;
2512        uint32_t minLayerZ;
2513        uint32_t maxLayerZ;
2514        status_t result;
2515    public:
2516        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2517                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2518                uint32_t sw, uint32_t sh,
2519                uint32_t minLayerZ, uint32_t maxLayerZ)
2520            : flinger(flinger), dpy(dpy),
2521              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2522              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2523              result(PERMISSION_DENIED)
2524        {
2525        }
2526        status_t getResult() const {
2527            return result;
2528        }
2529        virtual bool handler() {
2530            Mutex::Autolock _l(flinger->mStateLock);
2531
2532            // if we have secure windows, never allow the screen capture
2533            if (flinger->mSecureFrameBuffer)
2534                return true;
2535
2536            result = flinger->captureScreenImplLocked(dpy,
2537                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2538
2539            return true;
2540        }
2541    };
2542
2543    sp<MessageBase> msg = new MessageCaptureScreen(this,
2544            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2545    status_t res = postMessageSync(msg);
2546    if (res == NO_ERROR) {
2547        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2548    }
2549    return res;
2550}
2551
2552// ---------------------------------------------------------------------------
2553
2554sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2555{
2556    sp<Layer> result;
2557    Mutex::Autolock _l(mStateLock);
2558    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2559    return result;
2560}
2561
2562// ---------------------------------------------------------------------------
2563
2564Client::Client(const sp<SurfaceFlinger>& flinger)
2565    : mFlinger(flinger), mNameGenerator(1)
2566{
2567}
2568
2569Client::~Client()
2570{
2571    const size_t count = mLayers.size();
2572    for (size_t i=0 ; i<count ; i++) {
2573        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2574        if (layer != 0) {
2575            mFlinger->removeLayer(layer);
2576        }
2577    }
2578}
2579
2580status_t Client::initCheck() const {
2581    return NO_ERROR;
2582}
2583
2584size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2585{
2586    Mutex::Autolock _l(mLock);
2587    size_t name = mNameGenerator++;
2588    mLayers.add(name, layer);
2589    return name;
2590}
2591
2592void Client::detachLayer(const LayerBaseClient* layer)
2593{
2594    Mutex::Autolock _l(mLock);
2595    // we do a linear search here, because this doesn't happen often
2596    const size_t count = mLayers.size();
2597    for (size_t i=0 ; i<count ; i++) {
2598        if (mLayers.valueAt(i) == layer) {
2599            mLayers.removeItemsAt(i, 1);
2600            break;
2601        }
2602    }
2603}
2604sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2605{
2606    Mutex::Autolock _l(mLock);
2607    sp<LayerBaseClient> lbc;
2608    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2609    if (layer != 0) {
2610        lbc = layer.promote();
2611        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2612    }
2613    return lbc;
2614}
2615
2616
2617status_t Client::onTransact(
2618    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2619{
2620    // these must be checked
2621     IPCThreadState* ipc = IPCThreadState::self();
2622     const int pid = ipc->getCallingPid();
2623     const int uid = ipc->getCallingUid();
2624     const int self_pid = getpid();
2625     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2626         // we're called from a different process, do the real check
2627         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2628         {
2629             ALOGE("Permission Denial: "
2630                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2631             return PERMISSION_DENIED;
2632         }
2633     }
2634     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2635}
2636
2637
2638sp<ISurface> Client::createSurface(
2639        ISurfaceComposerClient::surface_data_t* params,
2640        const String8& name,
2641        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2642        uint32_t flags)
2643{
2644    /*
2645     * createSurface must be called from the GL thread so that it can
2646     * have access to the GL context.
2647     */
2648
2649    class MessageCreateSurface : public MessageBase {
2650        sp<ISurface> result;
2651        SurfaceFlinger* flinger;
2652        ISurfaceComposerClient::surface_data_t* params;
2653        Client* client;
2654        const String8& name;
2655        DisplayID display;
2656        uint32_t w, h;
2657        PixelFormat format;
2658        uint32_t flags;
2659    public:
2660        MessageCreateSurface(SurfaceFlinger* flinger,
2661                ISurfaceComposerClient::surface_data_t* params,
2662                const String8& name, Client* client,
2663                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2664                uint32_t flags)
2665            : flinger(flinger), params(params), client(client), name(name),
2666              display(display), w(w), h(h), format(format), flags(flags)
2667        {
2668        }
2669        sp<ISurface> getResult() const { return result; }
2670        virtual bool handler() {
2671            result = flinger->createSurface(params, name, client,
2672                    display, w, h, format, flags);
2673            return true;
2674        }
2675    };
2676
2677    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2678            params, name, this, display, w, h, format, flags);
2679    mFlinger->postMessageSync(msg);
2680    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2681}
2682status_t Client::destroySurface(SurfaceID sid) {
2683    return mFlinger->removeSurface(this, sid);
2684}
2685
2686// ---------------------------------------------------------------------------
2687
2688GraphicBufferAlloc::GraphicBufferAlloc() {}
2689
2690GraphicBufferAlloc::~GraphicBufferAlloc() {}
2691
2692sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2693        PixelFormat format, uint32_t usage, status_t* error) {
2694    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2695    status_t err = graphicBuffer->initCheck();
2696    *error = err;
2697    if (err != 0 || graphicBuffer->handle == 0) {
2698        if (err == NO_MEMORY) {
2699            GraphicBuffer::dumpAllocationsToSystemLog();
2700        }
2701        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2702             "failed (%s), handle=%p",
2703                w, h, strerror(-err), graphicBuffer->handle);
2704        return 0;
2705    }
2706    return graphicBuffer;
2707}
2708
2709// ---------------------------------------------------------------------------
2710
2711GraphicPlane::GraphicPlane()
2712    : mHw(0)
2713{
2714}
2715
2716GraphicPlane::~GraphicPlane() {
2717    delete mHw;
2718}
2719
2720bool GraphicPlane::initialized() const {
2721    return mHw ? true : false;
2722}
2723
2724int GraphicPlane::getWidth() const {
2725    return mWidth;
2726}
2727
2728int GraphicPlane::getHeight() const {
2729    return mHeight;
2730}
2731
2732void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2733{
2734    mHw = hw;
2735
2736    // initialize the display orientation transform.
2737    // it's a constant that should come from the display driver.
2738    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2739    char property[PROPERTY_VALUE_MAX];
2740    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2741        //displayOrientation
2742        switch (atoi(property)) {
2743        case 90:
2744            displayOrientation = ISurfaceComposer::eOrientation90;
2745            break;
2746        case 270:
2747            displayOrientation = ISurfaceComposer::eOrientation270;
2748            break;
2749        }
2750    }
2751
2752    const float w = hw->getWidth();
2753    const float h = hw->getHeight();
2754    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2755            &mDisplayTransform);
2756    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2757        mDisplayWidth = h;
2758        mDisplayHeight = w;
2759    } else {
2760        mDisplayWidth = w;
2761        mDisplayHeight = h;
2762    }
2763
2764    setOrientation(ISurfaceComposer::eOrientationDefault);
2765}
2766
2767status_t GraphicPlane::orientationToTransfrom(
2768        int orientation, int w, int h, Transform* tr)
2769{
2770    uint32_t flags = 0;
2771    switch (orientation) {
2772    case ISurfaceComposer::eOrientationDefault:
2773        flags = Transform::ROT_0;
2774        break;
2775    case ISurfaceComposer::eOrientation90:
2776        flags = Transform::ROT_90;
2777        break;
2778    case ISurfaceComposer::eOrientation180:
2779        flags = Transform::ROT_180;
2780        break;
2781    case ISurfaceComposer::eOrientation270:
2782        flags = Transform::ROT_270;
2783        break;
2784    default:
2785        return BAD_VALUE;
2786    }
2787    tr->set(flags, w, h);
2788    return NO_ERROR;
2789}
2790
2791status_t GraphicPlane::setOrientation(int orientation)
2792{
2793    // If the rotation can be handled in hardware, this is where
2794    // the magic should happen.
2795
2796    const DisplayHardware& hw(displayHardware());
2797    const float w = mDisplayWidth;
2798    const float h = mDisplayHeight;
2799    mWidth = int(w);
2800    mHeight = int(h);
2801
2802    Transform orientationTransform;
2803    GraphicPlane::orientationToTransfrom(orientation, w, h,
2804            &orientationTransform);
2805    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2806        mWidth = int(h);
2807        mHeight = int(w);
2808    }
2809
2810    mOrientation = orientation;
2811    mGlobalTransform = mDisplayTransform * orientationTransform;
2812    return NO_ERROR;
2813}
2814
2815const DisplayHardware& GraphicPlane::displayHardware() const {
2816    return *mHw;
2817}
2818
2819DisplayHardware& GraphicPlane::editDisplayHardware() {
2820    return *mHw;
2821}
2822
2823const Transform& GraphicPlane::transform() const {
2824    return mGlobalTransform;
2825}
2826
2827EGLDisplay GraphicPlane::getEGLDisplay() const {
2828    return mHw->getEGLDisplay();
2829}
2830
2831// ---------------------------------------------------------------------------
2832
2833}; // namespace android
2834