SurfaceFlinger.cpp revision cb9732a951d20cacb7ebe2dab132b5738226b1b6 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <stdint.h>
22#include <unistd.h>
23#include <fcntl.h>
24#include <errno.h>
25#include <math.h>
26#include <limits.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/ioctl.h>
30
31#include <cutils/log.h>
32#include <cutils/properties.h>
33
34#include <binder/IPCThreadState.h>
35#include <binder/IServiceManager.h>
36#include <binder/MemoryHeapBase.h>
37#include <binder/PermissionCache.h>
38
39#include <gui/IDisplayEventConnection.h>
40
41#include <utils/String8.h>
42#include <utils/String16.h>
43#include <utils/StopWatch.h>
44#include <utils/Trace.h>
45
46#include <ui/GraphicBufferAllocator.h>
47#include <ui/PixelFormat.h>
48
49#include <GLES/gl.h>
50
51#include "clz.h"
52#include "DdmConnection.h"
53#include "EventThread.h"
54#include "GLExtensions.h"
55#include "Layer.h"
56#include "LayerDim.h"
57#include "LayerScreenshot.h"
58#include "SurfaceFlinger.h"
59
60#include "DisplayHardware/DisplayHardware.h"
61#include "DisplayHardware/HWComposer.h"
62
63#include <private/android_filesystem_config.h>
64#include <private/gui/SharedBufferStack.h>
65
66#define EGL_VERSION_HW_ANDROID  0x3143
67
68#define DISPLAY_COUNT       1
69
70namespace android {
71// ---------------------------------------------------------------------------
72
73const String16 sHardwareTest("android.permission.HARDWARE_TEST");
74const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
75const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
76const String16 sDump("android.permission.DUMP");
77
78// ---------------------------------------------------------------------------
79
80SurfaceFlinger::SurfaceFlinger()
81    :   BnSurfaceComposer(), Thread(false),
82        mTransactionFlags(0),
83        mTransationPending(false),
84        mLayersRemoved(false),
85        mBootTime(systemTime()),
86        mVisibleRegionsDirty(false),
87        mHwWorkListDirty(false),
88        mElectronBeamAnimationMode(0),
89        mDebugRegion(0),
90        mDebugBackground(0),
91        mDebugDDMS(0),
92        mDebugDisableHWC(0),
93        mDebugDisableTransformHint(0),
94        mDebugInSwapBuffers(0),
95        mLastSwapBufferTime(0),
96        mDebugInTransaction(0),
97        mLastTransactionTime(0),
98        mBootFinished(false),
99        mConsoleSignals(0),
100        mSecureFrameBuffer(0)
101{
102    init();
103}
104
105void SurfaceFlinger::init()
106{
107    ALOGI("SurfaceFlinger is starting");
108
109    // debugging stuff...
110    char value[PROPERTY_VALUE_MAX];
111
112    property_get("debug.sf.showupdates", value, "0");
113    mDebugRegion = atoi(value);
114
115    property_get("debug.sf.showbackground", value, "0");
116    mDebugBackground = atoi(value);
117
118#ifdef DDMS_DEBUGGING
119    property_get("debug.sf.ddms", value, "0");
120    mDebugDDMS = atoi(value);
121    if (mDebugDDMS) {
122        DdmConnection::start(getServiceName());
123    }
124#endif
125
126    ALOGI_IF(mDebugRegion,       "showupdates enabled");
127    ALOGI_IF(mDebugBackground,   "showbackground enabled");
128    ALOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
129}
130
131void SurfaceFlinger::onFirstRef()
132{
133    mEventQueue.init(this);
134
135    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
136
137    // Wait for the main thread to be done with its initialization
138    mReadyToRunBarrier.wait();
139}
140
141
142SurfaceFlinger::~SurfaceFlinger()
143{
144    glDeleteTextures(1, &mWormholeTexName);
145}
146
147void SurfaceFlinger::binderDied(const wp<IBinder>& who)
148{
149    // the window manager died on us. prepare its eulogy.
150
151    // reset screen orientation
152    Vector<ComposerState> state;
153    setTransactionState(state, eOrientationDefault, 0);
154
155    // restart the boot-animation
156    property_set("ctl.start", "bootanim");
157}
158
159sp<IMemoryHeap> SurfaceFlinger::getCblk() const
160{
161    return mServerHeap;
162}
163
164sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
165{
166    sp<ISurfaceComposerClient> bclient;
167    sp<Client> client(new Client(this));
168    status_t err = client->initCheck();
169    if (err == NO_ERROR) {
170        bclient = client;
171    }
172    return bclient;
173}
174
175sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
176{
177    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
178    return gba;
179}
180
181const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
182{
183    ALOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
184    const GraphicPlane& plane(mGraphicPlanes[dpy]);
185    return plane;
186}
187
188GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
189{
190    return const_cast<GraphicPlane&>(
191        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
192}
193
194void SurfaceFlinger::bootFinished()
195{
196    const nsecs_t now = systemTime();
197    const nsecs_t duration = now - mBootTime;
198    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
199    mBootFinished = true;
200
201    // wait patiently for the window manager death
202    const String16 name("window");
203    sp<IBinder> window(defaultServiceManager()->getService(name));
204    if (window != 0) {
205        window->linkToDeath(this);
206    }
207
208    // stop boot animation
209    property_set("ctl.stop", "bootanim");
210}
211
212static inline uint16_t pack565(int r, int g, int b) {
213    return (r<<11)|(g<<5)|b;
214}
215
216status_t SurfaceFlinger::readyToRun()
217{
218    ALOGI(   "SurfaceFlinger's main thread ready to run. "
219            "Initializing graphics H/W...");
220
221    // we only support one display currently
222    int dpy = 0;
223
224    {
225        // initialize the main display
226        GraphicPlane& plane(graphicPlane(dpy));
227        DisplayHardware* const hw = new DisplayHardware(this, dpy);
228        plane.setDisplayHardware(hw);
229    }
230
231    // create the shared control-block
232    mServerHeap = new MemoryHeapBase(4096,
233            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
234    ALOGE_IF(mServerHeap==0, "can't create shared memory dealer");
235
236    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
237    ALOGE_IF(mServerCblk==0, "can't get to shared control block's address");
238
239    new(mServerCblk) surface_flinger_cblk_t;
240
241    // initialize primary screen
242    // (other display should be initialized in the same manner, but
243    // asynchronously, as they could come and go. None of this is supported
244    // yet).
245    const GraphicPlane& plane(graphicPlane(dpy));
246    const DisplayHardware& hw = plane.displayHardware();
247    const uint32_t w = hw.getWidth();
248    const uint32_t h = hw.getHeight();
249    const uint32_t f = hw.getFormat();
250    hw.makeCurrent();
251
252    // initialize the shared control block
253    mServerCblk->connected |= 1<<dpy;
254    display_cblk_t* dcblk = mServerCblk->displays + dpy;
255    memset(dcblk, 0, sizeof(display_cblk_t));
256    dcblk->w            = plane.getWidth();
257    dcblk->h            = plane.getHeight();
258    dcblk->format       = f;
259    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
260    dcblk->xdpi         = hw.getDpiX();
261    dcblk->ydpi         = hw.getDpiY();
262    dcblk->fps          = hw.getRefreshRate();
263    dcblk->density      = hw.getDensity();
264
265    // Initialize OpenGL|ES
266    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
267    glPixelStorei(GL_PACK_ALIGNMENT, 4);
268    glEnableClientState(GL_VERTEX_ARRAY);
269    glEnable(GL_SCISSOR_TEST);
270    glShadeModel(GL_FLAT);
271    glDisable(GL_DITHER);
272    glDisable(GL_CULL_FACE);
273
274    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
275    const uint16_t g1 = pack565(0x17,0x2f,0x17);
276    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
277    glGenTextures(1, &mWormholeTexName);
278    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
283    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
284            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
285
286    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
287    glGenTextures(1, &mProtectedTexName);
288    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
292    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
293    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
294            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
295
296    glViewport(0, 0, w, h);
297    glMatrixMode(GL_PROJECTION);
298    glLoadIdentity();
299    // put the origin in the left-bottom corner
300    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
301
302
303    // start the EventThread
304    mEventThread = new EventThread(this);
305    mEventQueue.setEventThread(mEventThread);
306    hw.startSleepManagement();
307
308    /*
309     *  We're now ready to accept clients...
310     */
311
312    mReadyToRunBarrier.open();
313
314    // start boot animation
315    property_set("ctl.start", "bootanim");
316
317    return NO_ERROR;
318}
319
320// ----------------------------------------------------------------------------
321
322bool SurfaceFlinger::authenticateSurfaceTexture(
323        const sp<ISurfaceTexture>& surfaceTexture) const {
324    Mutex::Autolock _l(mStateLock);
325    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
326
327    // Check the visible layer list for the ISurface
328    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
329    size_t count = currentLayers.size();
330    for (size_t i=0 ; i<count ; i++) {
331        const sp<LayerBase>& layer(currentLayers[i]);
332        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
333        if (lbc != NULL) {
334            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
335            if (lbcBinder == surfaceTextureBinder) {
336                return true;
337            }
338        }
339    }
340
341    // Check the layers in the purgatory.  This check is here so that if a
342    // SurfaceTexture gets destroyed before all the clients are done using it,
343    // the error will not be reported as "surface XYZ is not authenticated", but
344    // will instead fail later on when the client tries to use the surface,
345    // which should be reported as "surface XYZ returned an -ENODEV".  The
346    // purgatorized layers are no less authentic than the visible ones, so this
347    // should not cause any harm.
348    size_t purgatorySize =  mLayerPurgatory.size();
349    for (size_t i=0 ; i<purgatorySize ; i++) {
350        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
351        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
352        if (lbc != NULL) {
353            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
354            if (lbcBinder == surfaceTextureBinder) {
355                return true;
356            }
357        }
358    }
359
360    return false;
361}
362
363// ----------------------------------------------------------------------------
364
365sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
366    return mEventThread->createEventConnection();
367}
368
369// ----------------------------------------------------------------------------
370
371void SurfaceFlinger::waitForEvent() {
372    mEventQueue.waitMessage();
373}
374
375void SurfaceFlinger::signalTransaction() {
376    mEventQueue.invalidate();
377}
378
379void SurfaceFlinger::signalLayerUpdate() {
380    mEventQueue.invalidate();
381}
382
383void SurfaceFlinger::signalRefresh() {
384    mEventQueue.refresh();
385}
386
387status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
388        nsecs_t reltime, uint32_t flags) {
389    return mEventQueue.postMessage(msg, reltime);
390}
391
392status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
393        nsecs_t reltime, uint32_t flags) {
394    status_t res = mEventQueue.postMessage(msg, reltime);
395    if (res == NO_ERROR) {
396        msg->wait();
397    }
398    return res;
399}
400
401bool SurfaceFlinger::threadLoop()
402{
403    waitForEvent();
404    return true;
405}
406
407void SurfaceFlinger::onMessageReceived(int32_t what)
408{
409    ATRACE_CALL();
410    switch (what) {
411        case MessageQueue::REFRESH: {
412//        case MessageQueue::INVALIDATE: {
413            // check for transactions
414            if (CC_UNLIKELY(mConsoleSignals)) {
415                handleConsoleEvents();
416            }
417
418            // if we're in a global transaction, don't do anything.
419            const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
420            uint32_t transactionFlags = peekTransactionFlags(mask);
421            if (CC_UNLIKELY(transactionFlags)) {
422                handleTransaction(transactionFlags);
423            }
424
425            // post surfaces (if needed)
426            handlePageFlip();
427
428//            signalRefresh();
429//
430//        } break;
431//
432//        case MessageQueue::REFRESH: {
433
434            handleRefresh();
435
436            const DisplayHardware& hw(graphicPlane(0).displayHardware());
437
438//            if (mDirtyRegion.isEmpty()) {
439//                return;
440//            }
441
442            if (CC_UNLIKELY(mHwWorkListDirty)) {
443                // build the h/w work list
444                handleWorkList();
445            }
446
447            if (CC_LIKELY(hw.canDraw())) {
448                // repaint the framebuffer (if needed)
449                handleRepaint();
450                // inform the h/w that we're done compositing
451                hw.compositionComplete();
452                postFramebuffer();
453            } else {
454                // pretend we did the post
455                hw.compositionComplete();
456            }
457
458        } break;
459    }
460}
461
462void SurfaceFlinger::postFramebuffer()
463{
464    ATRACE_CALL();
465    // mSwapRegion can be empty here is some cases, for instance if a hidden
466    // or fully transparent window is updating.
467    // in that case, we need to flip anyways to not risk a deadlock with
468    // h/w composer.
469
470    const DisplayHardware& hw(graphicPlane(0).displayHardware());
471    const nsecs_t now = systemTime();
472    mDebugInSwapBuffers = now;
473    hw.flip(mSwapRegion);
474
475    size_t numLayers = mVisibleLayersSortedByZ.size();
476    for (size_t i = 0; i < numLayers; i++) {
477        mVisibleLayersSortedByZ[i]->onLayerDisplayed();
478    }
479
480    mLastSwapBufferTime = systemTime() - now;
481    mDebugInSwapBuffers = 0;
482    mSwapRegion.clear();
483}
484
485void SurfaceFlinger::handleConsoleEvents()
486{
487    // something to do with the console
488    const DisplayHardware& hw = graphicPlane(0).displayHardware();
489
490    int what = android_atomic_and(0, &mConsoleSignals);
491    if (what & eConsoleAcquired) {
492        hw.acquireScreen();
493        // this is a temporary work-around, eventually this should be called
494        // by the power-manager
495        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
496    }
497
498    if (what & eConsoleReleased) {
499        if (hw.isScreenAcquired()) {
500            hw.releaseScreen();
501        }
502    }
503
504    mDirtyRegion.set(hw.bounds());
505}
506
507void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
508{
509    ATRACE_CALL();
510
511    Mutex::Autolock _l(mStateLock);
512    const nsecs_t now = systemTime();
513    mDebugInTransaction = now;
514
515    // Here we're guaranteed that some transaction flags are set
516    // so we can call handleTransactionLocked() unconditionally.
517    // We call getTransactionFlags(), which will also clear the flags,
518    // with mStateLock held to guarantee that mCurrentState won't change
519    // until the transaction is committed.
520
521    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
522    transactionFlags = getTransactionFlags(mask);
523    handleTransactionLocked(transactionFlags);
524
525    mLastTransactionTime = systemTime() - now;
526    mDebugInTransaction = 0;
527    invalidateHwcGeometry();
528    // here the transaction has been committed
529}
530
531void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
532{
533    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
534    const size_t count = currentLayers.size();
535
536    /*
537     * Traversal of the children
538     * (perform the transaction for each of them if needed)
539     */
540
541    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
542    if (layersNeedTransaction) {
543        for (size_t i=0 ; i<count ; i++) {
544            const sp<LayerBase>& layer = currentLayers[i];
545            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
546            if (!trFlags) continue;
547
548            const uint32_t flags = layer->doTransaction(0);
549            if (flags & Layer::eVisibleRegion)
550                mVisibleRegionsDirty = true;
551        }
552    }
553
554    /*
555     * Perform our own transaction if needed
556     */
557
558    if (transactionFlags & eTransactionNeeded) {
559        if (mCurrentState.orientation != mDrawingState.orientation) {
560            // the orientation has changed, recompute all visible regions
561            // and invalidate everything.
562
563            const int dpy = 0;
564            const int orientation = mCurrentState.orientation;
565            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
566            GraphicPlane& plane(graphicPlane(dpy));
567            plane.setOrientation(orientation);
568
569            // update the shared control block
570            const DisplayHardware& hw(plane.displayHardware());
571            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
572            dcblk->orientation = orientation;
573            dcblk->w = plane.getWidth();
574            dcblk->h = plane.getHeight();
575
576            mVisibleRegionsDirty = true;
577            mDirtyRegion.set(hw.bounds());
578        }
579
580        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
581            // layers have been added
582            mVisibleRegionsDirty = true;
583        }
584
585        // some layers might have been removed, so
586        // we need to update the regions they're exposing.
587        if (mLayersRemoved) {
588            mLayersRemoved = false;
589            mVisibleRegionsDirty = true;
590            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
591            const size_t count = previousLayers.size();
592            for (size_t i=0 ; i<count ; i++) {
593                const sp<LayerBase>& layer(previousLayers[i]);
594                if (currentLayers.indexOf( layer ) < 0) {
595                    // this layer is not visible anymore
596                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
597                }
598            }
599        }
600    }
601
602    commitTransaction();
603}
604
605void SurfaceFlinger::computeVisibleRegions(
606    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
607{
608    ATRACE_CALL();
609
610    const GraphicPlane& plane(graphicPlane(0));
611    const Transform& planeTransform(plane.transform());
612    const DisplayHardware& hw(plane.displayHardware());
613    const Region screenRegion(hw.bounds());
614
615    Region aboveOpaqueLayers;
616    Region aboveCoveredLayers;
617    Region dirty;
618
619    bool secureFrameBuffer = false;
620
621    size_t i = currentLayers.size();
622    while (i--) {
623        const sp<LayerBase>& layer = currentLayers[i];
624        layer->validateVisibility(planeTransform);
625
626        // start with the whole surface at its current location
627        const Layer::State& s(layer->drawingState());
628
629        /*
630         * opaqueRegion: area of a surface that is fully opaque.
631         */
632        Region opaqueRegion;
633
634        /*
635         * visibleRegion: area of a surface that is visible on screen
636         * and not fully transparent. This is essentially the layer's
637         * footprint minus the opaque regions above it.
638         * Areas covered by a translucent surface are considered visible.
639         */
640        Region visibleRegion;
641
642        /*
643         * coveredRegion: area of a surface that is covered by all
644         * visible regions above it (which includes the translucent areas).
645         */
646        Region coveredRegion;
647
648
649        // handle hidden surfaces by setting the visible region to empty
650        if (CC_LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
651            const bool translucent = !layer->isOpaque();
652            const Rect bounds(layer->visibleBounds());
653            visibleRegion.set(bounds);
654            visibleRegion.andSelf(screenRegion);
655            if (!visibleRegion.isEmpty()) {
656                // Remove the transparent area from the visible region
657                if (translucent) {
658                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
659                }
660
661                // compute the opaque region
662                const int32_t layerOrientation = layer->getOrientation();
663                if (s.alpha==255 && !translucent &&
664                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
665                    // the opaque region is the layer's footprint
666                    opaqueRegion = visibleRegion;
667                }
668            }
669        }
670
671        // Clip the covered region to the visible region
672        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
673
674        // Update aboveCoveredLayers for next (lower) layer
675        aboveCoveredLayers.orSelf(visibleRegion);
676
677        // subtract the opaque region covered by the layers above us
678        visibleRegion.subtractSelf(aboveOpaqueLayers);
679
680        // compute this layer's dirty region
681        if (layer->contentDirty) {
682            // we need to invalidate the whole region
683            dirty = visibleRegion;
684            // as well, as the old visible region
685            dirty.orSelf(layer->visibleRegionScreen);
686            layer->contentDirty = false;
687        } else {
688            /* compute the exposed region:
689             *   the exposed region consists of two components:
690             *   1) what's VISIBLE now and was COVERED before
691             *   2) what's EXPOSED now less what was EXPOSED before
692             *
693             * note that (1) is conservative, we start with the whole
694             * visible region but only keep what used to be covered by
695             * something -- which mean it may have been exposed.
696             *
697             * (2) handles areas that were not covered by anything but got
698             * exposed because of a resize.
699             */
700            const Region newExposed = visibleRegion - coveredRegion;
701            const Region oldVisibleRegion = layer->visibleRegionScreen;
702            const Region oldCoveredRegion = layer->coveredRegionScreen;
703            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
704            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
705        }
706        dirty.subtractSelf(aboveOpaqueLayers);
707
708        // accumulate to the screen dirty region
709        dirtyRegion.orSelf(dirty);
710
711        // Update aboveOpaqueLayers for next (lower) layer
712        aboveOpaqueLayers.orSelf(opaqueRegion);
713
714        // Store the visible region is screen space
715        layer->setVisibleRegion(visibleRegion);
716        layer->setCoveredRegion(coveredRegion);
717
718        // If a secure layer is partially visible, lock-down the screen!
719        if (layer->isSecure() && !visibleRegion.isEmpty()) {
720            secureFrameBuffer = true;
721        }
722    }
723
724    // invalidate the areas where a layer was removed
725    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
726    mDirtyRegionRemovedLayer.clear();
727
728    mSecureFrameBuffer = secureFrameBuffer;
729    opaqueRegion = aboveOpaqueLayers;
730}
731
732
733void SurfaceFlinger::commitTransaction()
734{
735    if (!mLayersPendingRemoval.isEmpty()) {
736        // Notify removed layers now that they can't be drawn from
737        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
738            mLayersPendingRemoval[i]->onRemoved();
739        }
740        mLayersPendingRemoval.clear();
741    }
742
743    mDrawingState = mCurrentState;
744    mTransationPending = false;
745    mTransactionCV.broadcast();
746}
747
748void SurfaceFlinger::handlePageFlip()
749{
750    ATRACE_CALL();
751    const DisplayHardware& hw = graphicPlane(0).displayHardware();
752    const Region screenRegion(hw.bounds());
753
754    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
755    const bool visibleRegions = lockPageFlip(currentLayers);
756
757        if (visibleRegions || mVisibleRegionsDirty) {
758            Region opaqueRegion;
759            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
760
761            /*
762             *  rebuild the visible layer list
763             */
764            const size_t count = currentLayers.size();
765            mVisibleLayersSortedByZ.clear();
766            mVisibleLayersSortedByZ.setCapacity(count);
767            for (size_t i=0 ; i<count ; i++) {
768                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
769                    mVisibleLayersSortedByZ.add(currentLayers[i]);
770            }
771
772            mWormholeRegion = screenRegion.subtract(opaqueRegion);
773            mVisibleRegionsDirty = false;
774            invalidateHwcGeometry();
775        }
776
777    unlockPageFlip(currentLayers);
778
779    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
780    mDirtyRegion.andSelf(screenRegion);
781}
782
783void SurfaceFlinger::invalidateHwcGeometry()
784{
785    mHwWorkListDirty = true;
786}
787
788bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
789{
790    bool recomputeVisibleRegions = false;
791    size_t count = currentLayers.size();
792    sp<LayerBase> const* layers = currentLayers.array();
793    for (size_t i=0 ; i<count ; i++) {
794        const sp<LayerBase>& layer(layers[i]);
795        layer->lockPageFlip(recomputeVisibleRegions);
796    }
797    return recomputeVisibleRegions;
798}
799
800void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
801{
802    const GraphicPlane& plane(graphicPlane(0));
803    const Transform& planeTransform(plane.transform());
804    const size_t count = currentLayers.size();
805    sp<LayerBase> const* layers = currentLayers.array();
806    for (size_t i=0 ; i<count ; i++) {
807        const sp<LayerBase>& layer(layers[i]);
808        layer->unlockPageFlip(planeTransform, mDirtyRegion);
809    }
810}
811
812void SurfaceFlinger::handleRefresh()
813{
814    bool needInvalidate = false;
815    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
816    const size_t count = currentLayers.size();
817    for (size_t i=0 ; i<count ; i++) {
818        const sp<LayerBase>& layer(currentLayers[i]);
819        if (layer->onPreComposition()) {
820            needInvalidate = true;
821        }
822    }
823    if (needInvalidate) {
824        signalLayerUpdate();
825    }
826}
827
828
829void SurfaceFlinger::handleWorkList()
830{
831    mHwWorkListDirty = false;
832    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
833    if (hwc.initCheck() == NO_ERROR) {
834        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
835        const size_t count = currentLayers.size();
836        hwc.createWorkList(count);
837        hwc_layer_t* const cur(hwc.getLayers());
838        for (size_t i=0 ; cur && i<count ; i++) {
839            currentLayers[i]->setGeometry(&cur[i]);
840            if (mDebugDisableHWC || mDebugRegion) {
841                cur[i].compositionType = HWC_FRAMEBUFFER;
842                cur[i].flags |= HWC_SKIP_LAYER;
843            }
844        }
845    }
846}
847
848void SurfaceFlinger::handleRepaint()
849{
850    ATRACE_CALL();
851
852    // compute the invalid region
853    mSwapRegion.orSelf(mDirtyRegion);
854
855    if (CC_UNLIKELY(mDebugRegion)) {
856        debugFlashRegions();
857    }
858
859    // set the frame buffer
860    const DisplayHardware& hw(graphicPlane(0).displayHardware());
861    glMatrixMode(GL_MODELVIEW);
862    glLoadIdentity();
863
864    uint32_t flags = hw.getFlags();
865    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
866        (flags & DisplayHardware::BUFFER_PRESERVED))
867    {
868        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
869        // takes a rectangle, we must make sure to update that whole
870        // rectangle in that case
871        if (flags & DisplayHardware::SWAP_RECTANGLE) {
872            // TODO: we really should be able to pass a region to
873            // SWAP_RECTANGLE so that we don't have to redraw all this.
874            mDirtyRegion.set(mSwapRegion.bounds());
875        } else {
876            // in the BUFFER_PRESERVED case, obviously, we can update only
877            // what's needed and nothing more.
878            // NOTE: this is NOT a common case, as preserving the backbuffer
879            // is costly and usually involves copying the whole update back.
880        }
881    } else {
882        if (flags & DisplayHardware::PARTIAL_UPDATES) {
883            // We need to redraw the rectangle that will be updated
884            // (pushed to the framebuffer).
885            // This is needed because PARTIAL_UPDATES only takes one
886            // rectangle instead of a region (see DisplayHardware::flip())
887            mDirtyRegion.set(mSwapRegion.bounds());
888        } else {
889            // we need to redraw everything (the whole screen)
890            mDirtyRegion.set(hw.bounds());
891            mSwapRegion = mDirtyRegion;
892        }
893    }
894
895    setupHardwareComposer(mDirtyRegion);
896    composeSurfaces(mDirtyRegion);
897
898    // update the swap region and clear the dirty region
899    mSwapRegion.orSelf(mDirtyRegion);
900    mDirtyRegion.clear();
901}
902
903void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
904{
905    const DisplayHardware& hw(graphicPlane(0).displayHardware());
906    HWComposer& hwc(hw.getHwComposer());
907    hwc_layer_t* const cur(hwc.getLayers());
908    if (!cur) {
909        return;
910    }
911
912    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
913    size_t count = layers.size();
914
915    ALOGE_IF(hwc.getNumLayers() != count,
916            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
917            hwc.getNumLayers(), count);
918
919    // just to be extra-safe, use the smallest count
920    if (hwc.initCheck() == NO_ERROR) {
921        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
922    }
923
924    /*
925     *  update the per-frame h/w composer data for each layer
926     *  and build the transparent region of the FB
927     */
928    for (size_t i=0 ; i<count ; i++) {
929        const sp<LayerBase>& layer(layers[i]);
930        layer->setPerFrameData(&cur[i]);
931    }
932    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
933    status_t err = hwc.prepare();
934    ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
935
936    if (err == NO_ERROR) {
937        // what's happening here is tricky.
938        // we want to clear all the layers with the CLEAR_FB flags
939        // that are opaque.
940        // however, since some GPU are efficient at preserving
941        // the backbuffer, we want to take advantage of that so we do the
942        // clear only in the dirty region (other areas will be preserved
943        // on those GPUs).
944        //   NOTE: on non backbuffer preserving GPU, the dirty region
945        //   has already been expanded as needed, so the code is correct
946        //   there too.
947        //
948        // However, the content of the framebuffer cannot be trusted when
949        // we switch to/from FB/OVERLAY, in which case we need to
950        // expand the dirty region to those areas too.
951        //
952        // Note also that there is a special case when switching from
953        // "no layers in FB" to "some layers in FB", where we need to redraw
954        // the entire FB, since some areas might contain uninitialized
955        // data.
956        //
957        // Also we want to make sure to not clear areas that belong to
958        // layers above that won't redraw (we would just be erasing them),
959        // that is, we can't erase anything outside the dirty region.
960
961        Region transparent;
962
963        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
964            transparent.set(hw.getBounds());
965            dirtyInOut = transparent;
966        } else {
967            for (size_t i=0 ; i<count ; i++) {
968                const sp<LayerBase>& layer(layers[i]);
969                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
970                    transparent.orSelf(layer->visibleRegionScreen);
971                }
972                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
973                if (isOverlay != layer->isOverlay()) {
974                    // we transitioned to/from overlay, so add this layer
975                    // to the dirty region so the framebuffer can be either
976                    // cleared or redrawn.
977                    dirtyInOut.orSelf(layer->visibleRegionScreen);
978                }
979                layer->setOverlay(isOverlay);
980            }
981            // don't erase stuff outside the dirty region
982            transparent.andSelf(dirtyInOut);
983        }
984
985        /*
986         *  clear the area of the FB that need to be transparent
987         */
988        if (!transparent.isEmpty()) {
989            glClearColor(0,0,0,0);
990            Region::const_iterator it = transparent.begin();
991            Region::const_iterator const end = transparent.end();
992            const int32_t height = hw.getHeight();
993            while (it != end) {
994                const Rect& r(*it++);
995                const GLint sy = height - (r.top + r.height());
996                glScissor(r.left, sy, r.width(), r.height());
997                glClear(GL_COLOR_BUFFER_BIT);
998            }
999        }
1000    }
1001}
1002
1003void SurfaceFlinger::composeSurfaces(const Region& dirty)
1004{
1005    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1006    HWComposer& hwc(hw.getHwComposer());
1007
1008    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
1009    if (CC_UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
1010        // should never happen unless the window manager has a bug
1011        // draw something...
1012        drawWormhole();
1013    }
1014
1015    /*
1016     * and then, render the layers targeted at the framebuffer
1017     */
1018
1019    hwc_layer_t* const cur(hwc.getLayers());
1020    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1021    size_t count = layers.size();
1022
1023
1024    // FIXME: workaround for b/6020860
1025    if (hw.getFlags() & DisplayHardware::BUFFER_PRESERVED) {
1026        for (size_t i=0 ; i<count ; i++) {
1027            if (cur && (cur[i].compositionType == HWC_FRAMEBUFFER)) {
1028                glEnable(GL_SCISSOR_TEST);
1029                glScissor(0,0,0,0);
1030                glClear(GL_COLOR_BUFFER_BIT);
1031                break;
1032            }
1033        }
1034    }
1035    // FIXME: bug6020860 for b/6020860
1036
1037
1038    for (size_t i=0 ; i<count ; i++) {
1039        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1040            continue;
1041        }
1042        const sp<LayerBase>& layer(layers[i]);
1043        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1044        if (!clip.isEmpty()) {
1045            layer->draw(clip);
1046        }
1047    }
1048}
1049
1050void SurfaceFlinger::debugFlashRegions()
1051{
1052    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1053    const uint32_t flags = hw.getFlags();
1054    const int32_t height = hw.getHeight();
1055    if (mSwapRegion.isEmpty()) {
1056        return;
1057    }
1058
1059    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1060            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1061        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1062                mDirtyRegion.bounds() : hw.bounds());
1063        composeSurfaces(repaint);
1064    }
1065
1066    glDisable(GL_TEXTURE_EXTERNAL_OES);
1067    glDisable(GL_TEXTURE_2D);
1068    glDisable(GL_BLEND);
1069    glDisable(GL_SCISSOR_TEST);
1070
1071    static int toggle = 0;
1072    toggle = 1 - toggle;
1073    if (toggle) {
1074        glColor4f(1, 0, 1, 1);
1075    } else {
1076        glColor4f(1, 1, 0, 1);
1077    }
1078
1079    Region::const_iterator it = mDirtyRegion.begin();
1080    Region::const_iterator const end = mDirtyRegion.end();
1081    while (it != end) {
1082        const Rect& r = *it++;
1083        GLfloat vertices[][2] = {
1084                { r.left,  height - r.top },
1085                { r.left,  height - r.bottom },
1086                { r.right, height - r.bottom },
1087                { r.right, height - r.top }
1088        };
1089        glVertexPointer(2, GL_FLOAT, 0, vertices);
1090        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1091    }
1092
1093    hw.flip(mSwapRegion);
1094
1095    if (mDebugRegion > 1)
1096        usleep(mDebugRegion * 1000);
1097
1098    glEnable(GL_SCISSOR_TEST);
1099}
1100
1101void SurfaceFlinger::drawWormhole() const
1102{
1103    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1104    if (region.isEmpty())
1105        return;
1106
1107    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1108    const int32_t width = hw.getWidth();
1109    const int32_t height = hw.getHeight();
1110
1111    if (CC_LIKELY(!mDebugBackground)) {
1112        glClearColor(0,0,0,0);
1113        Region::const_iterator it = region.begin();
1114        Region::const_iterator const end = region.end();
1115        while (it != end) {
1116            const Rect& r = *it++;
1117            const GLint sy = height - (r.top + r.height());
1118            glScissor(r.left, sy, r.width(), r.height());
1119            glClear(GL_COLOR_BUFFER_BIT);
1120        }
1121    } else {
1122        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1123                { width, height }, { 0, height }  };
1124        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1125
1126        glVertexPointer(2, GL_SHORT, 0, vertices);
1127        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1128        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1129
1130        glDisable(GL_TEXTURE_EXTERNAL_OES);
1131        glEnable(GL_TEXTURE_2D);
1132        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1133        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1134        glMatrixMode(GL_TEXTURE);
1135        glLoadIdentity();
1136
1137        glDisable(GL_BLEND);
1138
1139        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1140        Region::const_iterator it = region.begin();
1141        Region::const_iterator const end = region.end();
1142        while (it != end) {
1143            const Rect& r = *it++;
1144            const GLint sy = height - (r.top + r.height());
1145            glScissor(r.left, sy, r.width(), r.height());
1146            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1147        }
1148        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1149        glDisable(GL_TEXTURE_2D);
1150        glLoadIdentity();
1151        glMatrixMode(GL_MODELVIEW);
1152    }
1153}
1154
1155status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1156{
1157    Mutex::Autolock _l(mStateLock);
1158    addLayer_l(layer);
1159    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1160    return NO_ERROR;
1161}
1162
1163status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1164{
1165    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1166    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1167}
1168
1169ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1170        const sp<LayerBaseClient>& lbc)
1171{
1172    // attach this layer to the client
1173    size_t name = client->attachLayer(lbc);
1174
1175    Mutex::Autolock _l(mStateLock);
1176
1177    // add this layer to the current state list
1178    addLayer_l(lbc);
1179
1180    return ssize_t(name);
1181}
1182
1183status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1184{
1185    Mutex::Autolock _l(mStateLock);
1186    status_t err = purgatorizeLayer_l(layer);
1187    if (err == NO_ERROR)
1188        setTransactionFlags(eTransactionNeeded);
1189    return err;
1190}
1191
1192status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1193{
1194    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1195    if (lbc != 0) {
1196        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1197    }
1198    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1199    if (index >= 0) {
1200        mLayersRemoved = true;
1201        return NO_ERROR;
1202    }
1203    return status_t(index);
1204}
1205
1206status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1207{
1208    // First add the layer to the purgatory list, which makes sure it won't
1209    // go away, then remove it from the main list (through a transaction).
1210    ssize_t err = removeLayer_l(layerBase);
1211    if (err >= 0) {
1212        mLayerPurgatory.add(layerBase);
1213    }
1214
1215    mLayersPendingRemoval.push(layerBase);
1216
1217    // it's possible that we don't find a layer, because it might
1218    // have been destroyed already -- this is not technically an error
1219    // from the user because there is a race between Client::destroySurface(),
1220    // ~Client() and ~ISurface().
1221    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1222}
1223
1224status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1225{
1226    layer->forceVisibilityTransaction();
1227    setTransactionFlags(eTraversalNeeded);
1228    return NO_ERROR;
1229}
1230
1231uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1232{
1233    return android_atomic_release_load(&mTransactionFlags);
1234}
1235
1236uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1237{
1238    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1239}
1240
1241uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1242{
1243    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1244    if ((old & flags)==0) { // wake the server up
1245        signalTransaction();
1246    }
1247    return old;
1248}
1249
1250
1251void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1252        int orientation, uint32_t flags) {
1253    Mutex::Autolock _l(mStateLock);
1254
1255    uint32_t transactionFlags = 0;
1256    if (mCurrentState.orientation != orientation) {
1257        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1258            mCurrentState.orientation = orientation;
1259            transactionFlags |= eTransactionNeeded;
1260        } else if (orientation != eOrientationUnchanged) {
1261            ALOGW("setTransactionState: ignoring unrecognized orientation: %d",
1262                    orientation);
1263        }
1264    }
1265
1266    const size_t count = state.size();
1267    for (size_t i=0 ; i<count ; i++) {
1268        const ComposerState& s(state[i]);
1269        sp<Client> client( static_cast<Client *>(s.client.get()) );
1270        transactionFlags |= setClientStateLocked(client, s.state);
1271    }
1272
1273    if (transactionFlags) {
1274        // this triggers the transaction
1275        setTransactionFlags(transactionFlags);
1276
1277        // if this is a synchronous transaction, wait for it to take effect
1278        // before returning.
1279        if (flags & eSynchronous) {
1280            mTransationPending = true;
1281        }
1282        while (mTransationPending) {
1283            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1284            if (CC_UNLIKELY(err != NO_ERROR)) {
1285                // just in case something goes wrong in SF, return to the
1286                // called after a few seconds.
1287                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1288                mTransationPending = false;
1289                break;
1290            }
1291        }
1292    }
1293}
1294
1295sp<ISurface> SurfaceFlinger::createSurface(
1296        ISurfaceComposerClient::surface_data_t* params,
1297        const String8& name,
1298        const sp<Client>& client,
1299        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1300        uint32_t flags)
1301{
1302    sp<LayerBaseClient> layer;
1303    sp<ISurface> surfaceHandle;
1304
1305    if (int32_t(w|h) < 0) {
1306        ALOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1307                int(w), int(h));
1308        return surfaceHandle;
1309    }
1310
1311    //ALOGD("createSurface for (%d x %d), name=%s", w, h, name.string());
1312    sp<Layer> normalLayer;
1313    switch (flags & eFXSurfaceMask) {
1314        case eFXSurfaceNormal:
1315            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1316            layer = normalLayer;
1317            break;
1318        case eFXSurfaceBlur:
1319            // for now we treat Blur as Dim, until we can implement it
1320            // efficiently.
1321        case eFXSurfaceDim:
1322            layer = createDimSurface(client, d, w, h, flags);
1323            break;
1324        case eFXSurfaceScreenshot:
1325            layer = createScreenshotSurface(client, d, w, h, flags);
1326            break;
1327    }
1328
1329    if (layer != 0) {
1330        layer->initStates(w, h, flags);
1331        layer->setName(name);
1332        ssize_t token = addClientLayer(client, layer);
1333
1334        surfaceHandle = layer->getSurface();
1335        if (surfaceHandle != 0) {
1336            params->token = token;
1337            params->identity = layer->getIdentity();
1338            if (normalLayer != 0) {
1339                Mutex::Autolock _l(mStateLock);
1340                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1341            }
1342        }
1343
1344        setTransactionFlags(eTransactionNeeded);
1345    }
1346
1347    return surfaceHandle;
1348}
1349
1350sp<Layer> SurfaceFlinger::createNormalSurface(
1351        const sp<Client>& client, DisplayID display,
1352        uint32_t w, uint32_t h, uint32_t flags,
1353        PixelFormat& format)
1354{
1355    // initialize the surfaces
1356    switch (format) { // TODO: take h/w into account
1357    case PIXEL_FORMAT_TRANSPARENT:
1358    case PIXEL_FORMAT_TRANSLUCENT:
1359        format = PIXEL_FORMAT_RGBA_8888;
1360        break;
1361    case PIXEL_FORMAT_OPAQUE:
1362#ifdef NO_RGBX_8888
1363        format = PIXEL_FORMAT_RGB_565;
1364#else
1365        format = PIXEL_FORMAT_RGBX_8888;
1366#endif
1367        break;
1368    }
1369
1370#ifdef NO_RGBX_8888
1371    if (format == PIXEL_FORMAT_RGBX_8888)
1372        format = PIXEL_FORMAT_RGBA_8888;
1373#endif
1374
1375    sp<Layer> layer = new Layer(this, display, client);
1376    status_t err = layer->setBuffers(w, h, format, flags);
1377    if (CC_LIKELY(err != NO_ERROR)) {
1378        ALOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1379        layer.clear();
1380    }
1381    return layer;
1382}
1383
1384sp<LayerDim> SurfaceFlinger::createDimSurface(
1385        const sp<Client>& client, DisplayID display,
1386        uint32_t w, uint32_t h, uint32_t flags)
1387{
1388    sp<LayerDim> layer = new LayerDim(this, display, client);
1389    return layer;
1390}
1391
1392sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1393        const sp<Client>& client, DisplayID display,
1394        uint32_t w, uint32_t h, uint32_t flags)
1395{
1396    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1397    return layer;
1398}
1399
1400status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1401{
1402    /*
1403     * called by the window manager, when a surface should be marked for
1404     * destruction.
1405     *
1406     * The surface is removed from the current and drawing lists, but placed
1407     * in the purgatory queue, so it's not destroyed right-away (we need
1408     * to wait for all client's references to go away first).
1409     */
1410
1411    status_t err = NAME_NOT_FOUND;
1412    Mutex::Autolock _l(mStateLock);
1413    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1414
1415    if (layer != 0) {
1416        err = purgatorizeLayer_l(layer);
1417        if (err == NO_ERROR) {
1418            setTransactionFlags(eTransactionNeeded);
1419        }
1420    }
1421    return err;
1422}
1423
1424status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1425{
1426    // called by ~ISurface() when all references are gone
1427    status_t err = NO_ERROR;
1428    sp<LayerBaseClient> l(layer.promote());
1429    if (l != NULL) {
1430        Mutex::Autolock _l(mStateLock);
1431        err = removeLayer_l(l);
1432        if (err == NAME_NOT_FOUND) {
1433            // The surface wasn't in the current list, which means it was
1434            // removed already, which means it is in the purgatory,
1435            // and need to be removed from there.
1436            ssize_t idx = mLayerPurgatory.remove(l);
1437            ALOGE_IF(idx < 0,
1438                    "layer=%p is not in the purgatory list", l.get());
1439        }
1440        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1441                "error removing layer=%p (%s)", l.get(), strerror(-err));
1442    }
1443    return err;
1444}
1445
1446uint32_t SurfaceFlinger::setClientStateLocked(
1447        const sp<Client>& client,
1448        const layer_state_t& s)
1449{
1450    uint32_t flags = 0;
1451    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1452    if (layer != 0) {
1453        const uint32_t what = s.what;
1454        if (what & ePositionChanged) {
1455            if (layer->setPosition(s.x, s.y))
1456                flags |= eTraversalNeeded;
1457        }
1458        if (what & eLayerChanged) {
1459            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1460            if (layer->setLayer(s.z)) {
1461                mCurrentState.layersSortedByZ.removeAt(idx);
1462                mCurrentState.layersSortedByZ.add(layer);
1463                // we need traversal (state changed)
1464                // AND transaction (list changed)
1465                flags |= eTransactionNeeded|eTraversalNeeded;
1466            }
1467        }
1468        if (what & eSizeChanged) {
1469            if (layer->setSize(s.w, s.h)) {
1470                flags |= eTraversalNeeded;
1471            }
1472        }
1473        if (what & eAlphaChanged) {
1474            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1475                flags |= eTraversalNeeded;
1476        }
1477        if (what & eMatrixChanged) {
1478            if (layer->setMatrix(s.matrix))
1479                flags |= eTraversalNeeded;
1480        }
1481        if (what & eTransparentRegionChanged) {
1482            if (layer->setTransparentRegionHint(s.transparentRegion))
1483                flags |= eTraversalNeeded;
1484        }
1485        if (what & eVisibilityChanged) {
1486            if (layer->setFlags(s.flags, s.mask))
1487                flags |= eTraversalNeeded;
1488        }
1489    }
1490    return flags;
1491}
1492
1493void SurfaceFlinger::screenReleased(int dpy)
1494{
1495    // this may be called by a signal handler, we can't do too much in here
1496    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1497    signalTransaction();
1498}
1499
1500void SurfaceFlinger::screenAcquired(int dpy)
1501{
1502    // this may be called by a signal handler, we can't do too much in here
1503    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1504    signalTransaction();
1505}
1506
1507status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1508{
1509    const size_t SIZE = 4096;
1510    char buffer[SIZE];
1511    String8 result;
1512
1513    if (!PermissionCache::checkCallingPermission(sDump)) {
1514        snprintf(buffer, SIZE, "Permission Denial: "
1515                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1516                IPCThreadState::self()->getCallingPid(),
1517                IPCThreadState::self()->getCallingUid());
1518        result.append(buffer);
1519    } else {
1520        // Try to get the main lock, but don't insist if we can't
1521        // (this would indicate SF is stuck, but we want to be able to
1522        // print something in dumpsys).
1523        int retry = 3;
1524        while (mStateLock.tryLock()<0 && --retry>=0) {
1525            usleep(1000000);
1526        }
1527        const bool locked(retry >= 0);
1528        if (!locked) {
1529            snprintf(buffer, SIZE,
1530                    "SurfaceFlinger appears to be unresponsive, "
1531                    "dumping anyways (no locks held)\n");
1532            result.append(buffer);
1533        }
1534
1535        bool dumpAll = true;
1536        size_t index = 0;
1537        size_t numArgs = args.size();
1538        if (numArgs) {
1539            if ((index < numArgs) &&
1540                    (args[index] == String16("--list"))) {
1541                index++;
1542                listLayersLocked(args, index, result, buffer, SIZE);
1543                dumpAll = false;
1544            }
1545
1546            if ((index < numArgs) &&
1547                    (args[index] == String16("--latency"))) {
1548                index++;
1549                dumpStatsLocked(args, index, result, buffer, SIZE);
1550                dumpAll = false;
1551            }
1552
1553            if ((index < numArgs) &&
1554                    (args[index] == String16("--latency-clear"))) {
1555                index++;
1556                clearStatsLocked(args, index, result, buffer, SIZE);
1557                dumpAll = false;
1558            }
1559        }
1560
1561        if (dumpAll) {
1562            dumpAllLocked(result, buffer, SIZE);
1563        }
1564
1565        if (locked) {
1566            mStateLock.unlock();
1567        }
1568    }
1569    write(fd, result.string(), result.size());
1570    return NO_ERROR;
1571}
1572
1573void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1574        String8& result, char* buffer, size_t SIZE) const
1575{
1576    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1577    const size_t count = currentLayers.size();
1578    for (size_t i=0 ; i<count ; i++) {
1579        const sp<LayerBase>& layer(currentLayers[i]);
1580        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1581        result.append(buffer);
1582    }
1583}
1584
1585void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1586        String8& result, char* buffer, size_t SIZE) const
1587{
1588    String8 name;
1589    if (index < args.size()) {
1590        name = String8(args[index]);
1591        index++;
1592    }
1593
1594    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1595    const size_t count = currentLayers.size();
1596    for (size_t i=0 ; i<count ; i++) {
1597        const sp<LayerBase>& layer(currentLayers[i]);
1598        if (name.isEmpty()) {
1599            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1600            result.append(buffer);
1601        }
1602        if (name.isEmpty() || (name == layer->getName())) {
1603            layer->dumpStats(result, buffer, SIZE);
1604        }
1605    }
1606}
1607
1608void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1609        String8& result, char* buffer, size_t SIZE) const
1610{
1611    String8 name;
1612    if (index < args.size()) {
1613        name = String8(args[index]);
1614        index++;
1615    }
1616
1617    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1618    const size_t count = currentLayers.size();
1619    for (size_t i=0 ; i<count ; i++) {
1620        const sp<LayerBase>& layer(currentLayers[i]);
1621        if (name.isEmpty() || (name == layer->getName())) {
1622            layer->clearStats();
1623        }
1624    }
1625}
1626
1627void SurfaceFlinger::dumpAllLocked(
1628        String8& result, char* buffer, size_t SIZE) const
1629{
1630    // figure out if we're stuck somewhere
1631    const nsecs_t now = systemTime();
1632    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1633    const nsecs_t inTransaction(mDebugInTransaction);
1634    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1635    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1636
1637    /*
1638     * Dump the visible layer list
1639     */
1640    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1641    const size_t count = currentLayers.size();
1642    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1643    result.append(buffer);
1644    for (size_t i=0 ; i<count ; i++) {
1645        const sp<LayerBase>& layer(currentLayers[i]);
1646        layer->dump(result, buffer, SIZE);
1647    }
1648
1649    /*
1650     * Dump the layers in the purgatory
1651     */
1652
1653    const size_t purgatorySize = mLayerPurgatory.size();
1654    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1655    result.append(buffer);
1656    for (size_t i=0 ; i<purgatorySize ; i++) {
1657        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1658        layer->shortDump(result, buffer, SIZE);
1659    }
1660
1661    /*
1662     * Dump SurfaceFlinger global state
1663     */
1664
1665    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1666    result.append(buffer);
1667
1668    const GLExtensions& extensions(GLExtensions::getInstance());
1669    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1670            extensions.getVendor(),
1671            extensions.getRenderer(),
1672            extensions.getVersion());
1673    result.append(buffer);
1674
1675    snprintf(buffer, SIZE, "EGL : %s\n",
1676            eglQueryString(graphicPlane(0).getEGLDisplay(),
1677                    EGL_VERSION_HW_ANDROID));
1678    result.append(buffer);
1679
1680    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1681    result.append(buffer);
1682
1683    mWormholeRegion.dump(result, "WormholeRegion");
1684    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1685    snprintf(buffer, SIZE,
1686            "  orientation=%d, canDraw=%d\n",
1687            mCurrentState.orientation, hw.canDraw());
1688    result.append(buffer);
1689    snprintf(buffer, SIZE,
1690            "  last eglSwapBuffers() time: %f us\n"
1691            "  last transaction time     : %f us\n"
1692            "  transaction-flags         : %08x\n"
1693            "  refresh-rate              : %f fps\n"
1694            "  x-dpi                     : %f\n"
1695            "  y-dpi                     : %f\n"
1696            "  density                   : %f\n",
1697            mLastSwapBufferTime/1000.0,
1698            mLastTransactionTime/1000.0,
1699            mTransactionFlags,
1700            hw.getRefreshRate(),
1701            hw.getDpiX(),
1702            hw.getDpiY(),
1703            hw.getDensity());
1704    result.append(buffer);
1705
1706    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1707            inSwapBuffersDuration/1000.0);
1708    result.append(buffer);
1709
1710    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1711            inTransactionDuration/1000.0);
1712    result.append(buffer);
1713
1714    /*
1715     * VSYNC state
1716     */
1717    mEventThread->dump(result, buffer, SIZE);
1718
1719    /*
1720     * Dump HWComposer state
1721     */
1722    HWComposer& hwc(hw.getHwComposer());
1723    snprintf(buffer, SIZE, "h/w composer state:\n");
1724    result.append(buffer);
1725    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1726            hwc.initCheck()==NO_ERROR ? "present" : "not present",
1727                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1728    result.append(buffer);
1729    hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1730
1731    /*
1732     * Dump gralloc state
1733     */
1734    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1735    alloc.dump(result);
1736    hw.dump(result);
1737}
1738
1739status_t SurfaceFlinger::onTransact(
1740    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1741{
1742    switch (code) {
1743        case CREATE_CONNECTION:
1744        case SET_TRANSACTION_STATE:
1745        case SET_ORIENTATION:
1746        case BOOT_FINISHED:
1747        case TURN_ELECTRON_BEAM_OFF:
1748        case TURN_ELECTRON_BEAM_ON:
1749        {
1750            // codes that require permission check
1751            IPCThreadState* ipc = IPCThreadState::self();
1752            const int pid = ipc->getCallingPid();
1753            const int uid = ipc->getCallingUid();
1754            if ((uid != AID_GRAPHICS) &&
1755                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1756                ALOGE("Permission Denial: "
1757                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1758                return PERMISSION_DENIED;
1759            }
1760            break;
1761        }
1762        case CAPTURE_SCREEN:
1763        {
1764            // codes that require permission check
1765            IPCThreadState* ipc = IPCThreadState::self();
1766            const int pid = ipc->getCallingPid();
1767            const int uid = ipc->getCallingUid();
1768            if ((uid != AID_GRAPHICS) &&
1769                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1770                ALOGE("Permission Denial: "
1771                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1772                return PERMISSION_DENIED;
1773            }
1774            break;
1775        }
1776    }
1777
1778    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1779    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1780        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1781        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1782            IPCThreadState* ipc = IPCThreadState::self();
1783            const int pid = ipc->getCallingPid();
1784            const int uid = ipc->getCallingUid();
1785            ALOGE("Permission Denial: "
1786                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1787            return PERMISSION_DENIED;
1788        }
1789        int n;
1790        switch (code) {
1791            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1792            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1793                return NO_ERROR;
1794            case 1002:  // SHOW_UPDATES
1795                n = data.readInt32();
1796                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1797                invalidateHwcGeometry();
1798                repaintEverything();
1799                return NO_ERROR;
1800            case 1003:  // SHOW_BACKGROUND
1801                n = data.readInt32();
1802                mDebugBackground = n ? 1 : 0;
1803                return NO_ERROR;
1804            case 1004:{ // repaint everything
1805                repaintEverything();
1806                return NO_ERROR;
1807            }
1808            case 1005:{ // force transaction
1809                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1810                return NO_ERROR;
1811            }
1812            case 1006:{ // send empty update
1813                signalRefresh();
1814                return NO_ERROR;
1815            }
1816            case 1008:  // toggle use of hw composer
1817                n = data.readInt32();
1818                mDebugDisableHWC = n ? 1 : 0;
1819                invalidateHwcGeometry();
1820                repaintEverything();
1821                return NO_ERROR;
1822            case 1009:  // toggle use of transform hint
1823                n = data.readInt32();
1824                mDebugDisableTransformHint = n ? 1 : 0;
1825                invalidateHwcGeometry();
1826                repaintEverything();
1827                return NO_ERROR;
1828            case 1010:  // interrogate.
1829                reply->writeInt32(0);
1830                reply->writeInt32(0);
1831                reply->writeInt32(mDebugRegion);
1832                reply->writeInt32(mDebugBackground);
1833                reply->writeInt32(mDebugDisableHWC);
1834                return NO_ERROR;
1835            case 1013: {
1836                Mutex::Autolock _l(mStateLock);
1837                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1838                reply->writeInt32(hw.getPageFlipCount());
1839            }
1840            return NO_ERROR;
1841        }
1842    }
1843    return err;
1844}
1845
1846void SurfaceFlinger::repaintEverything() {
1847    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1848    const Rect bounds(hw.getBounds());
1849    setInvalidateRegion(Region(bounds));
1850    signalTransaction();
1851}
1852
1853void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1854    Mutex::Autolock _l(mInvalidateLock);
1855    mInvalidateRegion = reg;
1856}
1857
1858Region SurfaceFlinger::getAndClearInvalidateRegion() {
1859    Mutex::Autolock _l(mInvalidateLock);
1860    Region reg(mInvalidateRegion);
1861    mInvalidateRegion.clear();
1862    return reg;
1863}
1864
1865// ---------------------------------------------------------------------------
1866
1867status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1868        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1869{
1870    Mutex::Autolock _l(mStateLock);
1871    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1872}
1873
1874status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1875        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1876{
1877    if (!GLExtensions::getInstance().haveFramebufferObject())
1878        return INVALID_OPERATION;
1879
1880    // get screen geometry
1881    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1882    const uint32_t hw_w = hw.getWidth();
1883    const uint32_t hw_h = hw.getHeight();
1884    GLfloat u = 1;
1885    GLfloat v = 1;
1886
1887    // make sure to clear all GL error flags
1888    while ( glGetError() != GL_NO_ERROR ) ;
1889
1890    // create a FBO
1891    GLuint name, tname;
1892    glGenTextures(1, &tname);
1893    glBindTexture(GL_TEXTURE_2D, tname);
1894    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1895            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1896    if (glGetError() != GL_NO_ERROR) {
1897        while ( glGetError() != GL_NO_ERROR ) ;
1898        GLint tw = (2 << (31 - clz(hw_w)));
1899        GLint th = (2 << (31 - clz(hw_h)));
1900        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1901                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1902        u = GLfloat(hw_w) / tw;
1903        v = GLfloat(hw_h) / th;
1904    }
1905    glGenFramebuffersOES(1, &name);
1906    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1907    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1908            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1909
1910    // redraw the screen entirely...
1911    glDisable(GL_TEXTURE_EXTERNAL_OES);
1912    glDisable(GL_TEXTURE_2D);
1913    glDisable(GL_SCISSOR_TEST);
1914    glClearColor(0,0,0,1);
1915    glClear(GL_COLOR_BUFFER_BIT);
1916    glEnable(GL_SCISSOR_TEST);
1917    glMatrixMode(GL_MODELVIEW);
1918    glLoadIdentity();
1919    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1920    const size_t count = layers.size();
1921    for (size_t i=0 ; i<count ; ++i) {
1922        const sp<LayerBase>& layer(layers[i]);
1923        layer->drawForSreenShot();
1924    }
1925
1926    hw.compositionComplete();
1927
1928    // back to main framebuffer
1929    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1930    glDisable(GL_SCISSOR_TEST);
1931    glDeleteFramebuffersOES(1, &name);
1932
1933    *textureName = tname;
1934    *uOut = u;
1935    *vOut = v;
1936    return NO_ERROR;
1937}
1938
1939// ---------------------------------------------------------------------------
1940
1941status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1942{
1943    // get screen geometry
1944    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1945    const uint32_t hw_w = hw.getWidth();
1946    const uint32_t hw_h = hw.getHeight();
1947    const Region screenBounds(hw.getBounds());
1948
1949    GLfloat u, v;
1950    GLuint tname;
1951    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1952    if (result != NO_ERROR) {
1953        return result;
1954    }
1955
1956    GLfloat vtx[8];
1957    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1958    glBindTexture(GL_TEXTURE_2D, tname);
1959    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1960    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1961    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1962    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1963    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1964    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1965    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1966    glVertexPointer(2, GL_FLOAT, 0, vtx);
1967
1968    /*
1969     * Texture coordinate mapping
1970     *
1971     *                 u
1972     *    1 +----------+---+
1973     *      |     |    |   |  image is inverted
1974     *      |     V    |   |  w.r.t. the texture
1975     *  1-v +----------+   |  coordinates
1976     *      |              |
1977     *      |              |
1978     *      |              |
1979     *    0 +--------------+
1980     *      0              1
1981     *
1982     */
1983
1984    class s_curve_interpolator {
1985        const float nbFrames, s, v;
1986    public:
1987        s_curve_interpolator(int nbFrames, float s)
1988        : nbFrames(1.0f / (nbFrames-1)), s(s),
1989          v(1.0f + expf(-s + 0.5f*s)) {
1990        }
1991        float operator()(int f) {
1992            const float x = f * nbFrames;
1993            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1994        }
1995    };
1996
1997    class v_stretch {
1998        const GLfloat hw_w, hw_h;
1999    public:
2000        v_stretch(uint32_t hw_w, uint32_t hw_h)
2001        : hw_w(hw_w), hw_h(hw_h) {
2002        }
2003        void operator()(GLfloat* vtx, float v) {
2004            const GLfloat w = hw_w + (hw_w * v);
2005            const GLfloat h = hw_h - (hw_h * v);
2006            const GLfloat x = (hw_w - w) * 0.5f;
2007            const GLfloat y = (hw_h - h) * 0.5f;
2008            vtx[0] = x;         vtx[1] = y;
2009            vtx[2] = x;         vtx[3] = y + h;
2010            vtx[4] = x + w;     vtx[5] = y + h;
2011            vtx[6] = x + w;     vtx[7] = y;
2012        }
2013    };
2014
2015    class h_stretch {
2016        const GLfloat hw_w, hw_h;
2017    public:
2018        h_stretch(uint32_t hw_w, uint32_t hw_h)
2019        : hw_w(hw_w), hw_h(hw_h) {
2020        }
2021        void operator()(GLfloat* vtx, float v) {
2022            const GLfloat w = hw_w - (hw_w * v);
2023            const GLfloat h = 1.0f;
2024            const GLfloat x = (hw_w - w) * 0.5f;
2025            const GLfloat y = (hw_h - h) * 0.5f;
2026            vtx[0] = x;         vtx[1] = y;
2027            vtx[2] = x;         vtx[3] = y + h;
2028            vtx[4] = x + w;     vtx[5] = y + h;
2029            vtx[6] = x + w;     vtx[7] = y;
2030        }
2031    };
2032
2033    // the full animation is 24 frames
2034    char value[PROPERTY_VALUE_MAX];
2035    property_get("debug.sf.electron_frames", value, "24");
2036    int nbFrames = (atoi(value) + 1) >> 1;
2037    if (nbFrames <= 0) // just in case
2038        nbFrames = 24;
2039
2040    s_curve_interpolator itr(nbFrames, 7.5f);
2041    s_curve_interpolator itg(nbFrames, 8.0f);
2042    s_curve_interpolator itb(nbFrames, 8.5f);
2043
2044    v_stretch vverts(hw_w, hw_h);
2045
2046    glMatrixMode(GL_TEXTURE);
2047    glLoadIdentity();
2048    glMatrixMode(GL_MODELVIEW);
2049    glLoadIdentity();
2050
2051    glEnable(GL_BLEND);
2052    glBlendFunc(GL_ONE, GL_ONE);
2053    for (int i=0 ; i<nbFrames ; i++) {
2054        float x, y, w, h;
2055        const float vr = itr(i);
2056        const float vg = itg(i);
2057        const float vb = itb(i);
2058
2059        // clear screen
2060        glColorMask(1,1,1,1);
2061        glClear(GL_COLOR_BUFFER_BIT);
2062        glEnable(GL_TEXTURE_2D);
2063
2064        // draw the red plane
2065        vverts(vtx, vr);
2066        glColorMask(1,0,0,1);
2067        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2068
2069        // draw the green plane
2070        vverts(vtx, vg);
2071        glColorMask(0,1,0,1);
2072        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2073
2074        // draw the blue plane
2075        vverts(vtx, vb);
2076        glColorMask(0,0,1,1);
2077        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2078
2079        // draw the white highlight (we use the last vertices)
2080        glDisable(GL_TEXTURE_2D);
2081        glColorMask(1,1,1,1);
2082        glColor4f(vg, vg, vg, 1);
2083        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2084        hw.flip(screenBounds);
2085    }
2086
2087    h_stretch hverts(hw_w, hw_h);
2088    glDisable(GL_BLEND);
2089    glDisable(GL_TEXTURE_2D);
2090    glColorMask(1,1,1,1);
2091    for (int i=0 ; i<nbFrames ; i++) {
2092        const float v = itg(i);
2093        hverts(vtx, v);
2094        glClear(GL_COLOR_BUFFER_BIT);
2095        glColor4f(1-v, 1-v, 1-v, 1);
2096        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2097        hw.flip(screenBounds);
2098    }
2099
2100    glColorMask(1,1,1,1);
2101    glEnable(GL_SCISSOR_TEST);
2102    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2103    glDeleteTextures(1, &tname);
2104    glDisable(GL_TEXTURE_2D);
2105    glDisable(GL_BLEND);
2106    return NO_ERROR;
2107}
2108
2109status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2110{
2111    status_t result = PERMISSION_DENIED;
2112
2113    if (!GLExtensions::getInstance().haveFramebufferObject())
2114        return INVALID_OPERATION;
2115
2116
2117    // get screen geometry
2118    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2119    const uint32_t hw_w = hw.getWidth();
2120    const uint32_t hw_h = hw.getHeight();
2121    const Region screenBounds(hw.bounds());
2122
2123    GLfloat u, v;
2124    GLuint tname;
2125    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2126    if (result != NO_ERROR) {
2127        return result;
2128    }
2129
2130    GLfloat vtx[8];
2131    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2132    glBindTexture(GL_TEXTURE_2D, tname);
2133    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2134    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2135    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2136    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2137    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2138    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2139    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2140    glVertexPointer(2, GL_FLOAT, 0, vtx);
2141
2142    class s_curve_interpolator {
2143        const float nbFrames, s, v;
2144    public:
2145        s_curve_interpolator(int nbFrames, float s)
2146        : nbFrames(1.0f / (nbFrames-1)), s(s),
2147          v(1.0f + expf(-s + 0.5f*s)) {
2148        }
2149        float operator()(int f) {
2150            const float x = f * nbFrames;
2151            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2152        }
2153    };
2154
2155    class v_stretch {
2156        const GLfloat hw_w, hw_h;
2157    public:
2158        v_stretch(uint32_t hw_w, uint32_t hw_h)
2159        : hw_w(hw_w), hw_h(hw_h) {
2160        }
2161        void operator()(GLfloat* vtx, float v) {
2162            const GLfloat w = hw_w + (hw_w * v);
2163            const GLfloat h = hw_h - (hw_h * v);
2164            const GLfloat x = (hw_w - w) * 0.5f;
2165            const GLfloat y = (hw_h - h) * 0.5f;
2166            vtx[0] = x;         vtx[1] = y;
2167            vtx[2] = x;         vtx[3] = y + h;
2168            vtx[4] = x + w;     vtx[5] = y + h;
2169            vtx[6] = x + w;     vtx[7] = y;
2170        }
2171    };
2172
2173    class h_stretch {
2174        const GLfloat hw_w, hw_h;
2175    public:
2176        h_stretch(uint32_t hw_w, uint32_t hw_h)
2177        : hw_w(hw_w), hw_h(hw_h) {
2178        }
2179        void operator()(GLfloat* vtx, float v) {
2180            const GLfloat w = hw_w - (hw_w * v);
2181            const GLfloat h = 1.0f;
2182            const GLfloat x = (hw_w - w) * 0.5f;
2183            const GLfloat y = (hw_h - h) * 0.5f;
2184            vtx[0] = x;         vtx[1] = y;
2185            vtx[2] = x;         vtx[3] = y + h;
2186            vtx[4] = x + w;     vtx[5] = y + h;
2187            vtx[6] = x + w;     vtx[7] = y;
2188        }
2189    };
2190
2191    // the full animation is 12 frames
2192    int nbFrames = 8;
2193    s_curve_interpolator itr(nbFrames, 7.5f);
2194    s_curve_interpolator itg(nbFrames, 8.0f);
2195    s_curve_interpolator itb(nbFrames, 8.5f);
2196
2197    h_stretch hverts(hw_w, hw_h);
2198    glDisable(GL_BLEND);
2199    glDisable(GL_TEXTURE_2D);
2200    glColorMask(1,1,1,1);
2201    for (int i=nbFrames-1 ; i>=0 ; i--) {
2202        const float v = itg(i);
2203        hverts(vtx, v);
2204        glClear(GL_COLOR_BUFFER_BIT);
2205        glColor4f(1-v, 1-v, 1-v, 1);
2206        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2207        hw.flip(screenBounds);
2208    }
2209
2210    nbFrames = 4;
2211    v_stretch vverts(hw_w, hw_h);
2212    glEnable(GL_BLEND);
2213    glBlendFunc(GL_ONE, GL_ONE);
2214    for (int i=nbFrames-1 ; i>=0 ; i--) {
2215        float x, y, w, h;
2216        const float vr = itr(i);
2217        const float vg = itg(i);
2218        const float vb = itb(i);
2219
2220        // clear screen
2221        glColorMask(1,1,1,1);
2222        glClear(GL_COLOR_BUFFER_BIT);
2223        glEnable(GL_TEXTURE_2D);
2224
2225        // draw the red plane
2226        vverts(vtx, vr);
2227        glColorMask(1,0,0,1);
2228        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2229
2230        // draw the green plane
2231        vverts(vtx, vg);
2232        glColorMask(0,1,0,1);
2233        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2234
2235        // draw the blue plane
2236        vverts(vtx, vb);
2237        glColorMask(0,0,1,1);
2238        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2239
2240        hw.flip(screenBounds);
2241    }
2242
2243    glColorMask(1,1,1,1);
2244    glEnable(GL_SCISSOR_TEST);
2245    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2246    glDeleteTextures(1, &tname);
2247    glDisable(GL_TEXTURE_2D);
2248    glDisable(GL_BLEND);
2249
2250    return NO_ERROR;
2251}
2252
2253// ---------------------------------------------------------------------------
2254
2255status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2256{
2257    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2258    if (!hw.canDraw()) {
2259        // we're already off
2260        return NO_ERROR;
2261    }
2262
2263    // turn off hwc while we're doing the animation
2264    hw.getHwComposer().disable();
2265    // and make sure to turn it back on (if needed) next time we compose
2266    invalidateHwcGeometry();
2267
2268    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2269        electronBeamOffAnimationImplLocked();
2270    }
2271
2272    // always clear the whole screen at the end of the animation
2273    glClearColor(0,0,0,1);
2274    glDisable(GL_SCISSOR_TEST);
2275    glClear(GL_COLOR_BUFFER_BIT);
2276    glEnable(GL_SCISSOR_TEST);
2277    hw.flip( Region(hw.bounds()) );
2278
2279    return NO_ERROR;
2280}
2281
2282status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2283{
2284    class MessageTurnElectronBeamOff : public MessageBase {
2285        SurfaceFlinger* flinger;
2286        int32_t mode;
2287        status_t result;
2288    public:
2289        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2290            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2291        }
2292        status_t getResult() const {
2293            return result;
2294        }
2295        virtual bool handler() {
2296            Mutex::Autolock _l(flinger->mStateLock);
2297            result = flinger->turnElectronBeamOffImplLocked(mode);
2298            return true;
2299        }
2300    };
2301
2302    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2303    status_t res = postMessageSync(msg);
2304    if (res == NO_ERROR) {
2305        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2306
2307        // work-around: when the power-manager calls us we activate the
2308        // animation. eventually, the "on" animation will be called
2309        // by the power-manager itself
2310        mElectronBeamAnimationMode = mode;
2311    }
2312    return res;
2313}
2314
2315// ---------------------------------------------------------------------------
2316
2317status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2318{
2319    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2320    if (hw.canDraw()) {
2321        // we're already on
2322        return NO_ERROR;
2323    }
2324    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2325        electronBeamOnAnimationImplLocked();
2326    }
2327
2328    // make sure to redraw the whole screen when the animation is done
2329    mDirtyRegion.set(hw.bounds());
2330    signalTransaction();
2331
2332    return NO_ERROR;
2333}
2334
2335status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2336{
2337    class MessageTurnElectronBeamOn : public MessageBase {
2338        SurfaceFlinger* flinger;
2339        int32_t mode;
2340        status_t result;
2341    public:
2342        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2343            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2344        }
2345        status_t getResult() const {
2346            return result;
2347        }
2348        virtual bool handler() {
2349            Mutex::Autolock _l(flinger->mStateLock);
2350            result = flinger->turnElectronBeamOnImplLocked(mode);
2351            return true;
2352        }
2353    };
2354
2355    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2356    return NO_ERROR;
2357}
2358
2359// ---------------------------------------------------------------------------
2360
2361status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2362        sp<IMemoryHeap>* heap,
2363        uint32_t* w, uint32_t* h, PixelFormat* f,
2364        uint32_t sw, uint32_t sh,
2365        uint32_t minLayerZ, uint32_t maxLayerZ)
2366{
2367    ATRACE_CALL();
2368
2369    status_t result = PERMISSION_DENIED;
2370
2371    // only one display supported for now
2372    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2373        return BAD_VALUE;
2374
2375    if (!GLExtensions::getInstance().haveFramebufferObject())
2376        return INVALID_OPERATION;
2377
2378    // get screen geometry
2379    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2380    const uint32_t hw_w = hw.getWidth();
2381    const uint32_t hw_h = hw.getHeight();
2382
2383    if ((sw > hw_w) || (sh > hw_h))
2384        return BAD_VALUE;
2385
2386    sw = (!sw) ? hw_w : sw;
2387    sh = (!sh) ? hw_h : sh;
2388    const size_t size = sw * sh * 4;
2389
2390    //ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2391    //        sw, sh, minLayerZ, maxLayerZ);
2392
2393    // make sure to clear all GL error flags
2394    while ( glGetError() != GL_NO_ERROR ) ;
2395
2396    // create a FBO
2397    GLuint name, tname;
2398    glGenRenderbuffersOES(1, &tname);
2399    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2400    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2401
2402    glGenFramebuffersOES(1, &name);
2403    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2404    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2405            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2406
2407    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2408
2409    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2410
2411        // invert everything, b/c glReadPixel() below will invert the FB
2412        glViewport(0, 0, sw, sh);
2413        glScissor(0, 0, sw, sh);
2414        glEnable(GL_SCISSOR_TEST);
2415        glMatrixMode(GL_PROJECTION);
2416        glPushMatrix();
2417        glLoadIdentity();
2418        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2419        glMatrixMode(GL_MODELVIEW);
2420
2421        // redraw the screen entirely...
2422        glClearColor(0,0,0,1);
2423        glClear(GL_COLOR_BUFFER_BIT);
2424
2425        const LayerVector& layers(mDrawingState.layersSortedByZ);
2426        const size_t count = layers.size();
2427        for (size_t i=0 ; i<count ; ++i) {
2428            const sp<LayerBase>& layer(layers[i]);
2429            const uint32_t flags = layer->drawingState().flags;
2430            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2431                const uint32_t z = layer->drawingState().z;
2432                if (z >= minLayerZ && z <= maxLayerZ) {
2433                    layer->drawForSreenShot();
2434                }
2435            }
2436        }
2437
2438        // XXX: this is needed on tegra
2439        glEnable(GL_SCISSOR_TEST);
2440        glScissor(0, 0, sw, sh);
2441
2442        // check for errors and return screen capture
2443        if (glGetError() != GL_NO_ERROR) {
2444            // error while rendering
2445            result = INVALID_OPERATION;
2446        } else {
2447            // allocate shared memory large enough to hold the
2448            // screen capture
2449            sp<MemoryHeapBase> base(
2450                    new MemoryHeapBase(size, 0, "screen-capture") );
2451            void* const ptr = base->getBase();
2452            if (ptr) {
2453                // capture the screen with glReadPixels()
2454                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2455                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2456                if (glGetError() == GL_NO_ERROR) {
2457                    *heap = base;
2458                    *w = sw;
2459                    *h = sh;
2460                    *f = PIXEL_FORMAT_RGBA_8888;
2461                    result = NO_ERROR;
2462                }
2463            } else {
2464                result = NO_MEMORY;
2465            }
2466        }
2467        glEnable(GL_SCISSOR_TEST);
2468        glViewport(0, 0, hw_w, hw_h);
2469        glMatrixMode(GL_PROJECTION);
2470        glPopMatrix();
2471        glMatrixMode(GL_MODELVIEW);
2472    } else {
2473        result = BAD_VALUE;
2474    }
2475
2476    // release FBO resources
2477    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2478    glDeleteRenderbuffersOES(1, &tname);
2479    glDeleteFramebuffersOES(1, &name);
2480
2481    hw.compositionComplete();
2482
2483    // ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2484
2485    return result;
2486}
2487
2488
2489status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2490        sp<IMemoryHeap>* heap,
2491        uint32_t* width, uint32_t* height, PixelFormat* format,
2492        uint32_t sw, uint32_t sh,
2493        uint32_t minLayerZ, uint32_t maxLayerZ)
2494{
2495    // only one display supported for now
2496    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2497        return BAD_VALUE;
2498
2499    if (!GLExtensions::getInstance().haveFramebufferObject())
2500        return INVALID_OPERATION;
2501
2502    class MessageCaptureScreen : public MessageBase {
2503        SurfaceFlinger* flinger;
2504        DisplayID dpy;
2505        sp<IMemoryHeap>* heap;
2506        uint32_t* w;
2507        uint32_t* h;
2508        PixelFormat* f;
2509        uint32_t sw;
2510        uint32_t sh;
2511        uint32_t minLayerZ;
2512        uint32_t maxLayerZ;
2513        status_t result;
2514    public:
2515        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2516                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2517                uint32_t sw, uint32_t sh,
2518                uint32_t minLayerZ, uint32_t maxLayerZ)
2519            : flinger(flinger), dpy(dpy),
2520              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2521              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2522              result(PERMISSION_DENIED)
2523        {
2524        }
2525        status_t getResult() const {
2526            return result;
2527        }
2528        virtual bool handler() {
2529            Mutex::Autolock _l(flinger->mStateLock);
2530
2531            // if we have secure windows, never allow the screen capture
2532            if (flinger->mSecureFrameBuffer)
2533                return true;
2534
2535            result = flinger->captureScreenImplLocked(dpy,
2536                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2537
2538            return true;
2539        }
2540    };
2541
2542    sp<MessageBase> msg = new MessageCaptureScreen(this,
2543            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2544    status_t res = postMessageSync(msg);
2545    if (res == NO_ERROR) {
2546        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2547    }
2548    return res;
2549}
2550
2551// ---------------------------------------------------------------------------
2552
2553sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2554{
2555    sp<Layer> result;
2556    Mutex::Autolock _l(mStateLock);
2557    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2558    return result;
2559}
2560
2561// ---------------------------------------------------------------------------
2562
2563Client::Client(const sp<SurfaceFlinger>& flinger)
2564    : mFlinger(flinger), mNameGenerator(1)
2565{
2566}
2567
2568Client::~Client()
2569{
2570    const size_t count = mLayers.size();
2571    for (size_t i=0 ; i<count ; i++) {
2572        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2573        if (layer != 0) {
2574            mFlinger->removeLayer(layer);
2575        }
2576    }
2577}
2578
2579status_t Client::initCheck() const {
2580    return NO_ERROR;
2581}
2582
2583size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2584{
2585    Mutex::Autolock _l(mLock);
2586    size_t name = mNameGenerator++;
2587    mLayers.add(name, layer);
2588    return name;
2589}
2590
2591void Client::detachLayer(const LayerBaseClient* layer)
2592{
2593    Mutex::Autolock _l(mLock);
2594    // we do a linear search here, because this doesn't happen often
2595    const size_t count = mLayers.size();
2596    for (size_t i=0 ; i<count ; i++) {
2597        if (mLayers.valueAt(i) == layer) {
2598            mLayers.removeItemsAt(i, 1);
2599            break;
2600        }
2601    }
2602}
2603sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2604{
2605    Mutex::Autolock _l(mLock);
2606    sp<LayerBaseClient> lbc;
2607    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2608    if (layer != 0) {
2609        lbc = layer.promote();
2610        ALOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2611    }
2612    return lbc;
2613}
2614
2615
2616status_t Client::onTransact(
2617    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2618{
2619    // these must be checked
2620     IPCThreadState* ipc = IPCThreadState::self();
2621     const int pid = ipc->getCallingPid();
2622     const int uid = ipc->getCallingUid();
2623     const int self_pid = getpid();
2624     if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2625         // we're called from a different process, do the real check
2626         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2627         {
2628             ALOGE("Permission Denial: "
2629                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2630             return PERMISSION_DENIED;
2631         }
2632     }
2633     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2634}
2635
2636
2637sp<ISurface> Client::createSurface(
2638        ISurfaceComposerClient::surface_data_t* params,
2639        const String8& name,
2640        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2641        uint32_t flags)
2642{
2643    /*
2644     * createSurface must be called from the GL thread so that it can
2645     * have access to the GL context.
2646     */
2647
2648    class MessageCreateSurface : public MessageBase {
2649        sp<ISurface> result;
2650        SurfaceFlinger* flinger;
2651        ISurfaceComposerClient::surface_data_t* params;
2652        Client* client;
2653        const String8& name;
2654        DisplayID display;
2655        uint32_t w, h;
2656        PixelFormat format;
2657        uint32_t flags;
2658    public:
2659        MessageCreateSurface(SurfaceFlinger* flinger,
2660                ISurfaceComposerClient::surface_data_t* params,
2661                const String8& name, Client* client,
2662                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2663                uint32_t flags)
2664            : flinger(flinger), params(params), client(client), name(name),
2665              display(display), w(w), h(h), format(format), flags(flags)
2666        {
2667        }
2668        sp<ISurface> getResult() const { return result; }
2669        virtual bool handler() {
2670            result = flinger->createSurface(params, name, client,
2671                    display, w, h, format, flags);
2672            return true;
2673        }
2674    };
2675
2676    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2677            params, name, this, display, w, h, format, flags);
2678    mFlinger->postMessageSync(msg);
2679    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2680}
2681status_t Client::destroySurface(SurfaceID sid) {
2682    return mFlinger->removeSurface(this, sid);
2683}
2684
2685// ---------------------------------------------------------------------------
2686
2687GraphicBufferAlloc::GraphicBufferAlloc() {}
2688
2689GraphicBufferAlloc::~GraphicBufferAlloc() {}
2690
2691sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2692        PixelFormat format, uint32_t usage, status_t* error) {
2693    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2694    status_t err = graphicBuffer->initCheck();
2695    *error = err;
2696    if (err != 0 || graphicBuffer->handle == 0) {
2697        if (err == NO_MEMORY) {
2698            GraphicBuffer::dumpAllocationsToSystemLog();
2699        }
2700        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2701             "failed (%s), handle=%p",
2702                w, h, strerror(-err), graphicBuffer->handle);
2703        return 0;
2704    }
2705    return graphicBuffer;
2706}
2707
2708// ---------------------------------------------------------------------------
2709
2710GraphicPlane::GraphicPlane()
2711    : mHw(0)
2712{
2713}
2714
2715GraphicPlane::~GraphicPlane() {
2716    delete mHw;
2717}
2718
2719bool GraphicPlane::initialized() const {
2720    return mHw ? true : false;
2721}
2722
2723int GraphicPlane::getWidth() const {
2724    return mWidth;
2725}
2726
2727int GraphicPlane::getHeight() const {
2728    return mHeight;
2729}
2730
2731void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2732{
2733    mHw = hw;
2734
2735    // initialize the display orientation transform.
2736    // it's a constant that should come from the display driver.
2737    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2738    char property[PROPERTY_VALUE_MAX];
2739    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2740        //displayOrientation
2741        switch (atoi(property)) {
2742        case 90:
2743            displayOrientation = ISurfaceComposer::eOrientation90;
2744            break;
2745        case 270:
2746            displayOrientation = ISurfaceComposer::eOrientation270;
2747            break;
2748        }
2749    }
2750
2751    const float w = hw->getWidth();
2752    const float h = hw->getHeight();
2753    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2754            &mDisplayTransform);
2755    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2756        mDisplayWidth = h;
2757        mDisplayHeight = w;
2758    } else {
2759        mDisplayWidth = w;
2760        mDisplayHeight = h;
2761    }
2762
2763    setOrientation(ISurfaceComposer::eOrientationDefault);
2764}
2765
2766status_t GraphicPlane::orientationToTransfrom(
2767        int orientation, int w, int h, Transform* tr)
2768{
2769    uint32_t flags = 0;
2770    switch (orientation) {
2771    case ISurfaceComposer::eOrientationDefault:
2772        flags = Transform::ROT_0;
2773        break;
2774    case ISurfaceComposer::eOrientation90:
2775        flags = Transform::ROT_90;
2776        break;
2777    case ISurfaceComposer::eOrientation180:
2778        flags = Transform::ROT_180;
2779        break;
2780    case ISurfaceComposer::eOrientation270:
2781        flags = Transform::ROT_270;
2782        break;
2783    default:
2784        return BAD_VALUE;
2785    }
2786    tr->set(flags, w, h);
2787    return NO_ERROR;
2788}
2789
2790status_t GraphicPlane::setOrientation(int orientation)
2791{
2792    // If the rotation can be handled in hardware, this is where
2793    // the magic should happen.
2794
2795    const DisplayHardware& hw(displayHardware());
2796    const float w = mDisplayWidth;
2797    const float h = mDisplayHeight;
2798    mWidth = int(w);
2799    mHeight = int(h);
2800
2801    Transform orientationTransform;
2802    GraphicPlane::orientationToTransfrom(orientation, w, h,
2803            &orientationTransform);
2804    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2805        mWidth = int(h);
2806        mHeight = int(w);
2807    }
2808
2809    mOrientation = orientation;
2810    mGlobalTransform = mDisplayTransform * orientationTransform;
2811    return NO_ERROR;
2812}
2813
2814const DisplayHardware& GraphicPlane::displayHardware() const {
2815    return *mHw;
2816}
2817
2818DisplayHardware& GraphicPlane::editDisplayHardware() {
2819    return *mHw;
2820}
2821
2822const Transform& GraphicPlane::transform() const {
2823    return mGlobalTransform;
2824}
2825
2826EGLDisplay GraphicPlane::getEGLDisplay() const {
2827    return mHw->getEGLDisplay();
2828}
2829
2830// ---------------------------------------------------------------------------
2831
2832}; // namespace android
2833