SurfaceFlinger.cpp revision 3a3cad30c40c8eb87671262a9fe7f0e214b6a934 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35#include <binder/PermissionCache.h>
36
37#include <utils/String8.h>
38#include <utils/String16.h>
39#include <utils/StopWatch.h>
40
41#include <ui/GraphicBufferAllocator.h>
42#include <ui/GraphicLog.h>
43#include <ui/PixelFormat.h>
44
45#include <pixelflinger/pixelflinger.h>
46#include <GLES/gl.h>
47
48#include "clz.h"
49#include "GLExtensions.h"
50#include "DdmConnection.h"
51#include "Layer.h"
52#include "LayerDim.h"
53#include "SurfaceFlinger.h"
54
55#include "DisplayHardware/DisplayHardware.h"
56#include "DisplayHardware/HWComposer.h"
57
58#include <private/surfaceflinger/SharedBufferStack.h>
59
60/* ideally AID_GRAPHICS would be in a semi-public header
61 * or there would be a way to map a user/group name to its id
62 */
63#ifndef AID_GRAPHICS
64#define AID_GRAPHICS 1003
65#endif
66
67#define DISPLAY_COUNT       1
68
69namespace android {
70// ---------------------------------------------------------------------------
71
72const String16 sHardwareTest("android.permission.HARDWARE_TEST");
73const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
74const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
75const String16 sDump("android.permission.DUMP");
76
77// ---------------------------------------------------------------------------
78
79SurfaceFlinger::SurfaceFlinger()
80    :   BnSurfaceComposer(), Thread(false),
81        mTransactionFlags(0),
82        mResizeTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mFreezeDisplay(false),
88        mElectronBeamAnimationMode(0),
89        mFreezeCount(0),
90        mFreezeDisplayTime(0),
91        mDebugRegion(0),
92        mDebugBackground(0),
93        mDebugDDMS(0),
94        mDebugDisableHWC(0),
95        mDebugDisableTransformHint(0),
96        mDebugInSwapBuffers(0),
97        mLastSwapBufferTime(0),
98        mDebugInTransaction(0),
99        mLastTransactionTime(0),
100        mBootFinished(false),
101        mConsoleSignals(0),
102        mSecureFrameBuffer(0)
103{
104    init();
105}
106
107void SurfaceFlinger::init()
108{
109    LOGI("SurfaceFlinger is starting");
110
111    // debugging stuff...
112    char value[PROPERTY_VALUE_MAX];
113
114    property_get("debug.sf.showupdates", value, "0");
115    mDebugRegion = atoi(value);
116
117    property_get("debug.sf.showbackground", value, "0");
118    mDebugBackground = atoi(value);
119
120    property_get("debug.sf.ddms", value, "0");
121    mDebugDDMS = atoi(value);
122    if (mDebugDDMS) {
123        DdmConnection::start(getServiceName());
124    }
125
126    LOGI_IF(mDebugRegion,       "showupdates enabled");
127    LOGI_IF(mDebugBackground,   "showbackground enabled");
128    LOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
129}
130
131SurfaceFlinger::~SurfaceFlinger()
132{
133    glDeleteTextures(1, &mWormholeTexName);
134}
135
136sp<IMemoryHeap> SurfaceFlinger::getCblk() const
137{
138    return mServerHeap;
139}
140
141sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
142{
143    sp<ISurfaceComposerClient> bclient;
144    sp<Client> client(new Client(this));
145    status_t err = client->initCheck();
146    if (err == NO_ERROR) {
147        bclient = client;
148    }
149    return bclient;
150}
151
152sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
153{
154    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
155    return gba;
156}
157
158const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
159{
160    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
161    const GraphicPlane& plane(mGraphicPlanes[dpy]);
162    return plane;
163}
164
165GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
166{
167    return const_cast<GraphicPlane&>(
168        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
169}
170
171void SurfaceFlinger::bootFinished()
172{
173    const nsecs_t now = systemTime();
174    const nsecs_t duration = now - mBootTime;
175    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
176    mBootFinished = true;
177
178    // wait patiently for the window manager death
179    const String16 name("window");
180    sp<IBinder> window(defaultServiceManager()->getService(name));
181    if (window != 0) {
182        window->linkToDeath(this);
183    }
184
185    // stop boot animation
186    property_set("ctl.stop", "bootanim");
187}
188
189void SurfaceFlinger::binderDied(const wp<IBinder>& who)
190{
191    // the window manager died on us. prepare its eulogy.
192
193    // unfreeze the screen in case it was... frozen
194    mFreezeDisplayTime = 0;
195    mFreezeCount = 0;
196    mFreezeDisplay = false;
197
198    // reset screen orientation
199    setOrientation(0, eOrientationDefault, 0);
200
201    // restart the boot-animation
202    property_set("ctl.start", "bootanim");
203}
204
205void SurfaceFlinger::onFirstRef()
206{
207    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
208
209    // Wait for the main thread to be done with its initialization
210    mReadyToRunBarrier.wait();
211}
212
213static inline uint16_t pack565(int r, int g, int b) {
214    return (r<<11)|(g<<5)|b;
215}
216
217status_t SurfaceFlinger::readyToRun()
218{
219    LOGI(   "SurfaceFlinger's main thread ready to run. "
220            "Initializing graphics H/W...");
221
222    // we only support one display currently
223    int dpy = 0;
224
225    {
226        // initialize the main display
227        GraphicPlane& plane(graphicPlane(dpy));
228        DisplayHardware* const hw = new DisplayHardware(this, dpy);
229        plane.setDisplayHardware(hw);
230    }
231
232    // create the shared control-block
233    mServerHeap = new MemoryHeapBase(4096,
234            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
235    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
236
237    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
238    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
239
240    new(mServerCblk) surface_flinger_cblk_t;
241
242    // initialize primary screen
243    // (other display should be initialized in the same manner, but
244    // asynchronously, as they could come and go. None of this is supported
245    // yet).
246    const GraphicPlane& plane(graphicPlane(dpy));
247    const DisplayHardware& hw = plane.displayHardware();
248    const uint32_t w = hw.getWidth();
249    const uint32_t h = hw.getHeight();
250    const uint32_t f = hw.getFormat();
251    hw.makeCurrent();
252
253    // initialize the shared control block
254    mServerCblk->connected |= 1<<dpy;
255    display_cblk_t* dcblk = mServerCblk->displays + dpy;
256    memset(dcblk, 0, sizeof(display_cblk_t));
257    dcblk->w            = plane.getWidth();
258    dcblk->h            = plane.getHeight();
259    dcblk->format       = f;
260    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
261    dcblk->xdpi         = hw.getDpiX();
262    dcblk->ydpi         = hw.getDpiY();
263    dcblk->fps          = hw.getRefreshRate();
264    dcblk->density      = hw.getDensity();
265
266    // Initialize OpenGL|ES
267    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
268    glPixelStorei(GL_PACK_ALIGNMENT, 4);
269    glEnableClientState(GL_VERTEX_ARRAY);
270    glEnable(GL_SCISSOR_TEST);
271    glShadeModel(GL_FLAT);
272    glDisable(GL_DITHER);
273    glDisable(GL_CULL_FACE);
274
275    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
276    const uint16_t g1 = pack565(0x17,0x2f,0x17);
277    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
278    glGenTextures(1, &mWormholeTexName);
279    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
284    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
285            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
286
287    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
288    glGenTextures(1, &mProtectedTexName);
289    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
292    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
293    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
294    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
295            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
296
297    glViewport(0, 0, w, h);
298    glMatrixMode(GL_PROJECTION);
299    glLoadIdentity();
300    // put the origin in the left-bottom corner
301    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
302
303    mReadyToRunBarrier.open();
304
305    /*
306     *  We're now ready to accept clients...
307     */
308
309    // start boot animation
310    property_set("ctl.start", "bootanim");
311
312    return NO_ERROR;
313}
314
315// ----------------------------------------------------------------------------
316#if 0
317#pragma mark -
318#pragma mark Events Handler
319#endif
320
321void SurfaceFlinger::waitForEvent()
322{
323    while (true) {
324        nsecs_t timeout = -1;
325        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
326        if (UNLIKELY(isFrozen())) {
327            // wait 5 seconds
328            const nsecs_t now = systemTime();
329            if (mFreezeDisplayTime == 0) {
330                mFreezeDisplayTime = now;
331            }
332            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
333            timeout = waitTime>0 ? waitTime : 0;
334        }
335
336        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
337
338        // see if we timed out
339        if (isFrozen()) {
340            const nsecs_t now = systemTime();
341            nsecs_t frozenTime = (now - mFreezeDisplayTime);
342            if (frozenTime >= freezeDisplayTimeout) {
343                // we timed out and are still frozen
344                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
345                        mFreezeDisplay, mFreezeCount);
346                mFreezeDisplayTime = 0;
347                mFreezeCount = 0;
348                mFreezeDisplay = false;
349            }
350        }
351
352        if (msg != 0) {
353            switch (msg->what) {
354                case MessageQueue::INVALIDATE:
355                    // invalidate message, just return to the main loop
356                    return;
357            }
358        }
359    }
360}
361
362void SurfaceFlinger::signalEvent() {
363    mEventQueue.invalidate();
364}
365
366bool SurfaceFlinger::authenticateSurfaceTexture(
367        const sp<ISurfaceTexture>& surfaceTexture) const {
368    Mutex::Autolock _l(mStateLock);
369    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
370
371    // Check the visible layer list for the ISurface
372    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
373    size_t count = currentLayers.size();
374    for (size_t i=0 ; i<count ; i++) {
375        const sp<LayerBase>& layer(currentLayers[i]);
376        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
377        if (lbc != NULL) {
378            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
379            if (lbcBinder == surfaceTextureBinder) {
380                return true;
381            }
382        }
383    }
384
385    // Check the layers in the purgatory.  This check is here so that if a
386    // SurfaceTexture gets destroyed before all the clients are done using it,
387    // the error will not be reported as "surface XYZ is not authenticated", but
388    // will instead fail later on when the client tries to use the surface,
389    // which should be reported as "surface XYZ returned an -ENODEV".  The
390    // purgatorized layers are no less authentic than the visible ones, so this
391    // should not cause any harm.
392    size_t purgatorySize =  mLayerPurgatory.size();
393    for (size_t i=0 ; i<purgatorySize ; i++) {
394        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
395        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
396        if (lbc != NULL) {
397            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
398            if (lbcBinder == surfaceTextureBinder) {
399                return true;
400            }
401        }
402    }
403
404    return false;
405}
406
407status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
408        nsecs_t reltime, uint32_t flags)
409{
410    return mEventQueue.postMessage(msg, reltime, flags);
411}
412
413status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
414        nsecs_t reltime, uint32_t flags)
415{
416    status_t res = mEventQueue.postMessage(msg, reltime, flags);
417    if (res == NO_ERROR) {
418        msg->wait();
419    }
420    return res;
421}
422
423// ----------------------------------------------------------------------------
424#if 0
425#pragma mark -
426#pragma mark Main loop
427#endif
428
429bool SurfaceFlinger::threadLoop()
430{
431    waitForEvent();
432
433    // check for transactions
434    if (UNLIKELY(mConsoleSignals)) {
435        handleConsoleEvents();
436    }
437
438    // if we're in a global transaction, don't do anything.
439    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
440    uint32_t transactionFlags = peekTransactionFlags(mask);
441    if (UNLIKELY(transactionFlags)) {
442        handleTransaction(transactionFlags);
443    }
444
445    // post surfaces (if needed)
446    handlePageFlip();
447
448    if (mDirtyRegion.isEmpty()) {
449        // nothing new to do.
450        return true;
451    }
452
453    if (UNLIKELY(mHwWorkListDirty)) {
454        // build the h/w work list
455        handleWorkList();
456    }
457
458    const DisplayHardware& hw(graphicPlane(0).displayHardware());
459    if (LIKELY(hw.canDraw())) {
460        // repaint the framebuffer (if needed)
461
462        const int index = hw.getCurrentBufferIndex();
463        GraphicLog& logger(GraphicLog::getInstance());
464
465        logger.log(GraphicLog::SF_REPAINT, index);
466        handleRepaint();
467
468        // inform the h/w that we're done compositing
469        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
470        hw.compositionComplete();
471
472        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
473        postFramebuffer();
474
475        logger.log(GraphicLog::SF_REPAINT_DONE, index);
476    } else {
477        // pretend we did the post
478        hw.compositionComplete();
479        usleep(16667); // 60 fps period
480    }
481    return true;
482}
483
484void SurfaceFlinger::postFramebuffer()
485{
486    // this should never happen. we do the flip anyways so we don't
487    // risk to cause a deadlock with hwc
488    LOGW_IF(mSwapRegion.isEmpty(), "mSwapRegion is empty");
489    const DisplayHardware& hw(graphicPlane(0).displayHardware());
490    const nsecs_t now = systemTime();
491    mDebugInSwapBuffers = now;
492    hw.flip(mSwapRegion);
493    mLastSwapBufferTime = systemTime() - now;
494    mDebugInSwapBuffers = 0;
495    mSwapRegion.clear();
496}
497
498void SurfaceFlinger::handleConsoleEvents()
499{
500    // something to do with the console
501    const DisplayHardware& hw = graphicPlane(0).displayHardware();
502
503    int what = android_atomic_and(0, &mConsoleSignals);
504    if (what & eConsoleAcquired) {
505        hw.acquireScreen();
506        // this is a temporary work-around, eventually this should be called
507        // by the power-manager
508        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
509    }
510
511    if (what & eConsoleReleased) {
512        if (hw.isScreenAcquired()) {
513            hw.releaseScreen();
514        }
515    }
516
517    mDirtyRegion.set(hw.bounds());
518}
519
520void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
521{
522    Mutex::Autolock _l(mStateLock);
523    const nsecs_t now = systemTime();
524    mDebugInTransaction = now;
525
526    // Here we're guaranteed that some transaction flags are set
527    // so we can call handleTransactionLocked() unconditionally.
528    // We call getTransactionFlags(), which will also clear the flags,
529    // with mStateLock held to guarantee that mCurrentState won't change
530    // until the transaction is committed.
531
532    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
533    transactionFlags = getTransactionFlags(mask);
534    handleTransactionLocked(transactionFlags);
535
536    mLastTransactionTime = systemTime() - now;
537    mDebugInTransaction = 0;
538    invalidateHwcGeometry();
539    // here the transaction has been committed
540}
541
542void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
543{
544    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
545    const size_t count = currentLayers.size();
546
547    /*
548     * Traversal of the children
549     * (perform the transaction for each of them if needed)
550     */
551
552    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
553    if (layersNeedTransaction) {
554        for (size_t i=0 ; i<count ; i++) {
555            const sp<LayerBase>& layer = currentLayers[i];
556            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
557            if (!trFlags) continue;
558
559            const uint32_t flags = layer->doTransaction(0);
560            if (flags & Layer::eVisibleRegion)
561                mVisibleRegionsDirty = true;
562        }
563    }
564
565    /*
566     * Perform our own transaction if needed
567     */
568
569    if (transactionFlags & eTransactionNeeded) {
570        if (mCurrentState.orientation != mDrawingState.orientation) {
571            // the orientation has changed, recompute all visible regions
572            // and invalidate everything.
573
574            const int dpy = 0;
575            const int orientation = mCurrentState.orientation;
576            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
577            GraphicPlane& plane(graphicPlane(dpy));
578            plane.setOrientation(orientation);
579
580            // update the shared control block
581            const DisplayHardware& hw(plane.displayHardware());
582            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
583            dcblk->orientation = orientation;
584            dcblk->w = plane.getWidth();
585            dcblk->h = plane.getHeight();
586
587            mVisibleRegionsDirty = true;
588            mDirtyRegion.set(hw.bounds());
589        }
590
591        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
592            // freezing or unfreezing the display -> trigger animation if needed
593            mFreezeDisplay = mCurrentState.freezeDisplay;
594            if (mFreezeDisplay)
595                 mFreezeDisplayTime = 0;
596        }
597
598        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
599            // layers have been added
600            mVisibleRegionsDirty = true;
601        }
602
603        // some layers might have been removed, so
604        // we need to update the regions they're exposing.
605        if (mLayersRemoved) {
606            mLayersRemoved = false;
607            mVisibleRegionsDirty = true;
608            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
609            const size_t count = previousLayers.size();
610            for (size_t i=0 ; i<count ; i++) {
611                const sp<LayerBase>& layer(previousLayers[i]);
612                if (currentLayers.indexOf( layer ) < 0) {
613                    // this layer is not visible anymore
614                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
615                }
616            }
617        }
618    }
619
620    commitTransaction();
621}
622
623sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
624{
625    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
626}
627
628void SurfaceFlinger::computeVisibleRegions(
629    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
630{
631    const GraphicPlane& plane(graphicPlane(0));
632    const Transform& planeTransform(plane.transform());
633    const DisplayHardware& hw(plane.displayHardware());
634    const Region screenRegion(hw.bounds());
635
636    Region aboveOpaqueLayers;
637    Region aboveCoveredLayers;
638    Region dirty;
639
640    bool secureFrameBuffer = false;
641
642    size_t i = currentLayers.size();
643    while (i--) {
644        const sp<LayerBase>& layer = currentLayers[i];
645        layer->validateVisibility(planeTransform);
646
647        // start with the whole surface at its current location
648        const Layer::State& s(layer->drawingState());
649
650        /*
651         * opaqueRegion: area of a surface that is fully opaque.
652         */
653        Region opaqueRegion;
654
655        /*
656         * visibleRegion: area of a surface that is visible on screen
657         * and not fully transparent. This is essentially the layer's
658         * footprint minus the opaque regions above it.
659         * Areas covered by a translucent surface are considered visible.
660         */
661        Region visibleRegion;
662
663        /*
664         * coveredRegion: area of a surface that is covered by all
665         * visible regions above it (which includes the translucent areas).
666         */
667        Region coveredRegion;
668
669
670        // handle hidden surfaces by setting the visible region to empty
671        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
672            const bool translucent = !layer->isOpaque();
673            const Rect bounds(layer->visibleBounds());
674            visibleRegion.set(bounds);
675            visibleRegion.andSelf(screenRegion);
676            if (!visibleRegion.isEmpty()) {
677                // Remove the transparent area from the visible region
678                if (translucent) {
679                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
680                }
681
682                // compute the opaque region
683                const int32_t layerOrientation = layer->getOrientation();
684                if (s.alpha==255 && !translucent &&
685                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
686                    // the opaque region is the layer's footprint
687                    opaqueRegion = visibleRegion;
688                }
689            }
690        }
691
692        // Clip the covered region to the visible region
693        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
694
695        // Update aboveCoveredLayers for next (lower) layer
696        aboveCoveredLayers.orSelf(visibleRegion);
697
698        // subtract the opaque region covered by the layers above us
699        visibleRegion.subtractSelf(aboveOpaqueLayers);
700
701        // compute this layer's dirty region
702        if (layer->contentDirty) {
703            // we need to invalidate the whole region
704            dirty = visibleRegion;
705            // as well, as the old visible region
706            dirty.orSelf(layer->visibleRegionScreen);
707            layer->contentDirty = false;
708        } else {
709            /* compute the exposed region:
710             *   the exposed region consists of two components:
711             *   1) what's VISIBLE now and was COVERED before
712             *   2) what's EXPOSED now less what was EXPOSED before
713             *
714             * note that (1) is conservative, we start with the whole
715             * visible region but only keep what used to be covered by
716             * something -- which mean it may have been exposed.
717             *
718             * (2) handles areas that were not covered by anything but got
719             * exposed because of a resize.
720             */
721            const Region newExposed = visibleRegion - coveredRegion;
722            const Region oldVisibleRegion = layer->visibleRegionScreen;
723            const Region oldCoveredRegion = layer->coveredRegionScreen;
724            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
725            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
726        }
727        dirty.subtractSelf(aboveOpaqueLayers);
728
729        // accumulate to the screen dirty region
730        dirtyRegion.orSelf(dirty);
731
732        // Update aboveOpaqueLayers for next (lower) layer
733        aboveOpaqueLayers.orSelf(opaqueRegion);
734
735        // Store the visible region is screen space
736        layer->setVisibleRegion(visibleRegion);
737        layer->setCoveredRegion(coveredRegion);
738
739        // If a secure layer is partially visible, lock-down the screen!
740        if (layer->isSecure() && !visibleRegion.isEmpty()) {
741            secureFrameBuffer = true;
742        }
743    }
744
745    // invalidate the areas where a layer was removed
746    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
747    mDirtyRegionRemovedLayer.clear();
748
749    mSecureFrameBuffer = secureFrameBuffer;
750    opaqueRegion = aboveOpaqueLayers;
751}
752
753
754void SurfaceFlinger::commitTransaction()
755{
756    mDrawingState = mCurrentState;
757    mResizeTransationPending = false;
758    mTransactionCV.broadcast();
759}
760
761void SurfaceFlinger::handlePageFlip()
762{
763    bool visibleRegions = mVisibleRegionsDirty;
764    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
765    visibleRegions |= lockPageFlip(currentLayers);
766
767        const DisplayHardware& hw = graphicPlane(0).displayHardware();
768        const Region screenRegion(hw.bounds());
769        if (visibleRegions) {
770            Region opaqueRegion;
771            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
772
773            /*
774             *  rebuild the visible layer list
775             */
776            const size_t count = currentLayers.size();
777            mVisibleLayersSortedByZ.clear();
778            mVisibleLayersSortedByZ.setCapacity(count);
779            for (size_t i=0 ; i<count ; i++) {
780                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
781                    mVisibleLayersSortedByZ.add(currentLayers[i]);
782            }
783
784            mWormholeRegion = screenRegion.subtract(opaqueRegion);
785            mVisibleRegionsDirty = false;
786            invalidateHwcGeometry();
787        }
788
789    unlockPageFlip(currentLayers);
790    mDirtyRegion.andSelf(screenRegion);
791}
792
793void SurfaceFlinger::invalidateHwcGeometry()
794{
795    mHwWorkListDirty = true;
796}
797
798bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
799{
800    bool recomputeVisibleRegions = false;
801    size_t count = currentLayers.size();
802    sp<LayerBase> const* layers = currentLayers.array();
803    for (size_t i=0 ; i<count ; i++) {
804        const sp<LayerBase>& layer(layers[i]);
805        layer->lockPageFlip(recomputeVisibleRegions);
806    }
807    return recomputeVisibleRegions;
808}
809
810void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
811{
812    const GraphicPlane& plane(graphicPlane(0));
813    const Transform& planeTransform(plane.transform());
814    size_t count = currentLayers.size();
815    sp<LayerBase> const* layers = currentLayers.array();
816    for (size_t i=0 ; i<count ; i++) {
817        const sp<LayerBase>& layer(layers[i]);
818        layer->unlockPageFlip(planeTransform, mDirtyRegion);
819    }
820}
821
822void SurfaceFlinger::handleWorkList()
823{
824    mHwWorkListDirty = false;
825    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
826    if (hwc.initCheck() == NO_ERROR) {
827        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
828        const size_t count = currentLayers.size();
829        hwc.createWorkList(count);
830        hwc_layer_t* const cur(hwc.getLayers());
831        for (size_t i=0 ; cur && i<count ; i++) {
832            currentLayers[i]->setGeometry(&cur[i]);
833            if (mDebugDisableHWC || mDebugRegion) {
834                cur[i].compositionType = HWC_FRAMEBUFFER;
835                cur[i].flags |= HWC_SKIP_LAYER;
836            }
837        }
838    }
839}
840
841void SurfaceFlinger::handleRepaint()
842{
843    // compute the invalid region
844    mSwapRegion.orSelf(mDirtyRegion);
845
846    if (UNLIKELY(mDebugRegion)) {
847        debugFlashRegions();
848    }
849
850    // set the frame buffer
851    const DisplayHardware& hw(graphicPlane(0).displayHardware());
852    glMatrixMode(GL_MODELVIEW);
853    glLoadIdentity();
854
855    uint32_t flags = hw.getFlags();
856    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
857        (flags & DisplayHardware::BUFFER_PRESERVED))
858    {
859        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
860        // takes a rectangle, we must make sure to update that whole
861        // rectangle in that case
862        if (flags & DisplayHardware::SWAP_RECTANGLE) {
863            // TODO: we really should be able to pass a region to
864            // SWAP_RECTANGLE so that we don't have to redraw all this.
865            mDirtyRegion.set(mSwapRegion.bounds());
866        } else {
867            // in the BUFFER_PRESERVED case, obviously, we can update only
868            // what's needed and nothing more.
869            // NOTE: this is NOT a common case, as preserving the backbuffer
870            // is costly and usually involves copying the whole update back.
871        }
872    } else {
873        if (flags & DisplayHardware::PARTIAL_UPDATES) {
874            // We need to redraw the rectangle that will be updated
875            // (pushed to the framebuffer).
876            // This is needed because PARTIAL_UPDATES only takes one
877            // rectangle instead of a region (see DisplayHardware::flip())
878            mDirtyRegion.set(mSwapRegion.bounds());
879        } else {
880            // we need to redraw everything (the whole screen)
881            mDirtyRegion.set(hw.bounds());
882            mSwapRegion = mDirtyRegion;
883        }
884    }
885
886    setupHardwareComposer(mDirtyRegion);
887    composeSurfaces(mDirtyRegion);
888
889    // update the swap region and clear the dirty region
890    mSwapRegion.orSelf(mDirtyRegion);
891    mDirtyRegion.clear();
892}
893
894void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
895{
896    const DisplayHardware& hw(graphicPlane(0).displayHardware());
897    HWComposer& hwc(hw.getHwComposer());
898    hwc_layer_t* const cur(hwc.getLayers());
899    if (!cur) {
900        return;
901    }
902
903    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
904    size_t count = layers.size();
905
906    LOGE_IF(hwc.getNumLayers() != count,
907            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
908            hwc.getNumLayers(), count);
909
910    // just to be extra-safe, use the smallest count
911    if (hwc.initCheck() == NO_ERROR) {
912        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
913    }
914
915    /*
916     *  update the per-frame h/w composer data for each layer
917     *  and build the transparent region of the FB
918     */
919    for (size_t i=0 ; i<count ; i++) {
920        const sp<LayerBase>& layer(layers[i]);
921        layer->setPerFrameData(&cur[i]);
922    }
923    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
924    status_t err = hwc.prepare();
925    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
926
927    if (err == NO_ERROR) {
928        // what's happening here is tricky.
929        // we want to clear all the layers with the CLEAR_FB flags
930        // that are opaque.
931        // however, since some GPU are efficient at preserving
932        // the backbuffer, we want to take advantage of that so we do the
933        // clear only in the dirty region (other areas will be preserved
934        // on those GPUs).
935        //   NOTE: on non backbuffer preserving GPU, the dirty region
936        //   has already been expanded as needed, so the code is correct
937        //   there too.
938        //
939        // However, the content of the framebuffer cannot be trusted when
940        // we switch to/from FB/OVERLAY, in which case we need to
941        // expand the dirty region to those areas too.
942        //
943        // Note also that there is a special case when switching from
944        // "no layers in FB" to "some layers in FB", where we need to redraw
945        // the entire FB, since some areas might contain uninitialized
946        // data.
947        //
948        // Also we want to make sure to not clear areas that belong to
949        // layers above that won't redraw (we would just be erasing them),
950        // that is, we can't erase anything outside the dirty region.
951
952        Region transparent;
953
954        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
955            transparent.set(hw.getBounds());
956            dirtyInOut = transparent;
957        } else {
958            for (size_t i=0 ; i<count ; i++) {
959                const sp<LayerBase>& layer(layers[i]);
960                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
961                    transparent.orSelf(layer->visibleRegionScreen);
962                }
963                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
964                if (isOverlay != layer->isOverlay()) {
965                    // we transitioned to/from overlay, so add this layer
966                    // to the dirty region so the framebuffer can be either
967                    // cleared or redrawn.
968                    dirtyInOut.orSelf(layer->visibleRegionScreen);
969                }
970                layer->setOverlay(isOverlay);
971            }
972            // don't erase stuff outside the dirty region
973            transparent.andSelf(dirtyInOut);
974        }
975
976        /*
977         *  clear the area of the FB that need to be transparent
978         */
979        if (!transparent.isEmpty()) {
980            glClearColor(0,0,0,0);
981            Region::const_iterator it = transparent.begin();
982            Region::const_iterator const end = transparent.end();
983            const int32_t height = hw.getHeight();
984            while (it != end) {
985                const Rect& r(*it++);
986                const GLint sy = height - (r.top + r.height());
987                glScissor(r.left, sy, r.width(), r.height());
988                glClear(GL_COLOR_BUFFER_BIT);
989            }
990        }
991    }
992}
993
994void SurfaceFlinger::composeSurfaces(const Region& dirty)
995{
996    const DisplayHardware& hw(graphicPlane(0).displayHardware());
997    HWComposer& hwc(hw.getHwComposer());
998
999    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
1000    if (UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
1001        // should never happen unless the window manager has a bug
1002        // draw something...
1003        drawWormhole();
1004    }
1005
1006    /*
1007     * and then, render the layers targeted at the framebuffer
1008     */
1009    hwc_layer_t* const cur(hwc.getLayers());
1010    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1011    size_t count = layers.size();
1012    for (size_t i=0 ; i<count ; i++) {
1013        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1014            continue;
1015        }
1016        const sp<LayerBase>& layer(layers[i]);
1017        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1018        if (!clip.isEmpty()) {
1019            layer->draw(clip);
1020        }
1021    }
1022}
1023
1024void SurfaceFlinger::debugFlashRegions()
1025{
1026    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1027    const uint32_t flags = hw.getFlags();
1028    const int32_t height = hw.getHeight();
1029    if (mSwapRegion.isEmpty()) {
1030        return;
1031    }
1032
1033    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1034            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1035        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1036                mDirtyRegion.bounds() : hw.bounds());
1037        composeSurfaces(repaint);
1038    }
1039
1040    glDisable(GL_TEXTURE_EXTERNAL_OES);
1041    glDisable(GL_TEXTURE_2D);
1042    glDisable(GL_BLEND);
1043    glDisable(GL_SCISSOR_TEST);
1044
1045    static int toggle = 0;
1046    toggle = 1 - toggle;
1047    if (toggle) {
1048        glColor4f(1, 0, 1, 1);
1049    } else {
1050        glColor4f(1, 1, 0, 1);
1051    }
1052
1053    Region::const_iterator it = mDirtyRegion.begin();
1054    Region::const_iterator const end = mDirtyRegion.end();
1055    while (it != end) {
1056        const Rect& r = *it++;
1057        GLfloat vertices[][2] = {
1058                { r.left,  height - r.top },
1059                { r.left,  height - r.bottom },
1060                { r.right, height - r.bottom },
1061                { r.right, height - r.top }
1062        };
1063        glVertexPointer(2, GL_FLOAT, 0, vertices);
1064        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1065    }
1066
1067    hw.flip(mSwapRegion);
1068
1069    if (mDebugRegion > 1)
1070        usleep(mDebugRegion * 1000);
1071
1072    glEnable(GL_SCISSOR_TEST);
1073}
1074
1075void SurfaceFlinger::drawWormhole() const
1076{
1077    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1078    if (region.isEmpty())
1079        return;
1080
1081    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1082    const int32_t width = hw.getWidth();
1083    const int32_t height = hw.getHeight();
1084
1085    if (LIKELY(!mDebugBackground)) {
1086        glClearColor(0,0,0,0);
1087        Region::const_iterator it = region.begin();
1088        Region::const_iterator const end = region.end();
1089        while (it != end) {
1090            const Rect& r = *it++;
1091            const GLint sy = height - (r.top + r.height());
1092            glScissor(r.left, sy, r.width(), r.height());
1093            glClear(GL_COLOR_BUFFER_BIT);
1094        }
1095    } else {
1096        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1097                { width, height }, { 0, height }  };
1098        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1099
1100        glVertexPointer(2, GL_SHORT, 0, vertices);
1101        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1102        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1103
1104        glDisable(GL_TEXTURE_EXTERNAL_OES);
1105        glEnable(GL_TEXTURE_2D);
1106        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1107        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1108        glMatrixMode(GL_TEXTURE);
1109        glLoadIdentity();
1110
1111        glDisable(GL_BLEND);
1112
1113        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1114        Region::const_iterator it = region.begin();
1115        Region::const_iterator const end = region.end();
1116        while (it != end) {
1117            const Rect& r = *it++;
1118            const GLint sy = height - (r.top + r.height());
1119            glScissor(r.left, sy, r.width(), r.height());
1120            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1121        }
1122        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1123        glDisable(GL_TEXTURE_2D);
1124        glLoadIdentity();
1125        glMatrixMode(GL_MODELVIEW);
1126    }
1127}
1128
1129void SurfaceFlinger::debugShowFPS() const
1130{
1131    static int mFrameCount;
1132    static int mLastFrameCount = 0;
1133    static nsecs_t mLastFpsTime = 0;
1134    static float mFps = 0;
1135    mFrameCount++;
1136    nsecs_t now = systemTime();
1137    nsecs_t diff = now - mLastFpsTime;
1138    if (diff > ms2ns(250)) {
1139        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1140        mLastFpsTime = now;
1141        mLastFrameCount = mFrameCount;
1142    }
1143    // XXX: mFPS has the value we want
1144 }
1145
1146status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1147{
1148    Mutex::Autolock _l(mStateLock);
1149    addLayer_l(layer);
1150    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1151    return NO_ERROR;
1152}
1153
1154status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1155{
1156    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1157    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1158}
1159
1160ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1161        const sp<LayerBaseClient>& lbc)
1162{
1163    // attach this layer to the client
1164    size_t name = client->attachLayer(lbc);
1165
1166    Mutex::Autolock _l(mStateLock);
1167
1168    // add this layer to the current state list
1169    addLayer_l(lbc);
1170
1171    return ssize_t(name);
1172}
1173
1174status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1175{
1176    Mutex::Autolock _l(mStateLock);
1177    status_t err = purgatorizeLayer_l(layer);
1178    if (err == NO_ERROR)
1179        setTransactionFlags(eTransactionNeeded);
1180    return err;
1181}
1182
1183status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1184{
1185    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1186    if (lbc != 0) {
1187        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1188    }
1189    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1190    if (index >= 0) {
1191        mLayersRemoved = true;
1192        return NO_ERROR;
1193    }
1194    return status_t(index);
1195}
1196
1197status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1198{
1199    // First add the layer to the purgatory list, which makes sure it won't
1200    // go away, then remove it from the main list (through a transaction).
1201    ssize_t err = removeLayer_l(layerBase);
1202    if (err >= 0) {
1203        mLayerPurgatory.add(layerBase);
1204    }
1205
1206    layerBase->onRemoved();
1207
1208    // it's possible that we don't find a layer, because it might
1209    // have been destroyed already -- this is not technically an error
1210    // from the user because there is a race between Client::destroySurface(),
1211    // ~Client() and ~ISurface().
1212    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1213}
1214
1215status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1216{
1217    layer->forceVisibilityTransaction();
1218    setTransactionFlags(eTraversalNeeded);
1219    return NO_ERROR;
1220}
1221
1222uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1223{
1224    return android_atomic_release_load(&mTransactionFlags);
1225}
1226
1227uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1228{
1229    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1230}
1231
1232uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1233{
1234    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1235    if ((old & flags)==0) { // wake the server up
1236        signalEvent();
1237    }
1238    return old;
1239}
1240
1241
1242void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1243        int orientation) {
1244    Mutex::Autolock _l(mStateLock);
1245
1246    uint32_t flags = 0;
1247    if (mCurrentState.orientation != orientation) {
1248        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1249            mCurrentState.orientation = orientation;
1250            flags |= eTransactionNeeded;
1251            mResizeTransationPending = true;
1252        } else if (orientation != eOrientationUnchanged) {
1253            LOGW("setTransactionState: ignoring unrecognized orientation: %d",
1254                    orientation);
1255        }
1256    }
1257
1258    const size_t count = state.size();
1259    for (size_t i=0 ; i<count ; i++) {
1260        const ComposerState& s(state[i]);
1261        sp<Client> client( static_cast<Client *>(s.client.get()) );
1262        flags |= setClientStateLocked(client, s.state);
1263    }
1264    if (flags) {
1265        setTransactionFlags(flags);
1266    }
1267
1268    signalEvent();
1269
1270    // if there is a transaction with a resize, wait for it to
1271    // take effect before returning.
1272    while (mResizeTransationPending) {
1273        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1274        if (CC_UNLIKELY(err != NO_ERROR)) {
1275            // just in case something goes wrong in SF, return to the
1276            // called after a few seconds.
1277            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1278            mResizeTransationPending = false;
1279            break;
1280        }
1281    }
1282}
1283
1284status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1285{
1286    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1287        return BAD_VALUE;
1288
1289    Mutex::Autolock _l(mStateLock);
1290    mCurrentState.freezeDisplay = 1;
1291    setTransactionFlags(eTransactionNeeded);
1292
1293    // flags is intended to communicate some sort of animation behavior
1294    // (for instance fading)
1295    return NO_ERROR;
1296}
1297
1298status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1299{
1300    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1301        return BAD_VALUE;
1302
1303    Mutex::Autolock _l(mStateLock);
1304    mCurrentState.freezeDisplay = 0;
1305    setTransactionFlags(eTransactionNeeded);
1306
1307    // flags is intended to communicate some sort of animation behavior
1308    // (for instance fading)
1309    return NO_ERROR;
1310}
1311
1312int SurfaceFlinger::setOrientation(DisplayID dpy,
1313        int orientation, uint32_t flags)
1314{
1315    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1316        return BAD_VALUE;
1317
1318    Mutex::Autolock _l(mStateLock);
1319    if (mCurrentState.orientation != orientation) {
1320        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1321            mCurrentState.orientationFlags = flags;
1322            mCurrentState.orientation = orientation;
1323            setTransactionFlags(eTransactionNeeded);
1324            mTransactionCV.wait(mStateLock);
1325        } else {
1326            orientation = BAD_VALUE;
1327        }
1328    }
1329    return orientation;
1330}
1331
1332sp<ISurface> SurfaceFlinger::createSurface(
1333        ISurfaceComposerClient::surface_data_t* params,
1334        const String8& name,
1335        const sp<Client>& client,
1336        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1337        uint32_t flags)
1338{
1339    sp<LayerBaseClient> layer;
1340    sp<ISurface> surfaceHandle;
1341
1342    if (int32_t(w|h) < 0) {
1343        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1344                int(w), int(h));
1345        return surfaceHandle;
1346    }
1347
1348    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1349    sp<Layer> normalLayer;
1350    switch (flags & eFXSurfaceMask) {
1351        case eFXSurfaceNormal:
1352            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1353            layer = normalLayer;
1354            break;
1355        case eFXSurfaceBlur:
1356            // for now we treat Blur as Dim, until we can implement it
1357            // efficiently.
1358        case eFXSurfaceDim:
1359            layer = createDimSurface(client, d, w, h, flags);
1360            break;
1361    }
1362
1363    if (layer != 0) {
1364        layer->initStates(w, h, flags);
1365        layer->setName(name);
1366        ssize_t token = addClientLayer(client, layer);
1367
1368        surfaceHandle = layer->getSurface();
1369        if (surfaceHandle != 0) {
1370            params->token = token;
1371            params->identity = layer->getIdentity();
1372            if (normalLayer != 0) {
1373                Mutex::Autolock _l(mStateLock);
1374                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1375            }
1376        }
1377
1378        setTransactionFlags(eTransactionNeeded);
1379    }
1380
1381    return surfaceHandle;
1382}
1383
1384sp<Layer> SurfaceFlinger::createNormalSurface(
1385        const sp<Client>& client, DisplayID display,
1386        uint32_t w, uint32_t h, uint32_t flags,
1387        PixelFormat& format)
1388{
1389    // initialize the surfaces
1390    switch (format) { // TODO: take h/w into account
1391    case PIXEL_FORMAT_TRANSPARENT:
1392    case PIXEL_FORMAT_TRANSLUCENT:
1393        format = PIXEL_FORMAT_RGBA_8888;
1394        break;
1395    case PIXEL_FORMAT_OPAQUE:
1396#ifdef NO_RGBX_8888
1397        format = PIXEL_FORMAT_RGB_565;
1398#else
1399        format = PIXEL_FORMAT_RGBX_8888;
1400#endif
1401        break;
1402    }
1403
1404#ifdef NO_RGBX_8888
1405    if (format == PIXEL_FORMAT_RGBX_8888)
1406        format = PIXEL_FORMAT_RGBA_8888;
1407#endif
1408
1409    sp<Layer> layer = new Layer(this, display, client);
1410    status_t err = layer->setBuffers(w, h, format, flags);
1411    if (LIKELY(err != NO_ERROR)) {
1412        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1413        layer.clear();
1414    }
1415    return layer;
1416}
1417
1418sp<LayerDim> SurfaceFlinger::createDimSurface(
1419        const sp<Client>& client, DisplayID display,
1420        uint32_t w, uint32_t h, uint32_t flags)
1421{
1422    sp<LayerDim> layer = new LayerDim(this, display, client);
1423    layer->initStates(w, h, flags);
1424    return layer;
1425}
1426
1427status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1428{
1429    /*
1430     * called by the window manager, when a surface should be marked for
1431     * destruction.
1432     *
1433     * The surface is removed from the current and drawing lists, but placed
1434     * in the purgatory queue, so it's not destroyed right-away (we need
1435     * to wait for all client's references to go away first).
1436     */
1437
1438    status_t err = NAME_NOT_FOUND;
1439    Mutex::Autolock _l(mStateLock);
1440    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1441    if (layer != 0) {
1442        err = purgatorizeLayer_l(layer);
1443        if (err == NO_ERROR) {
1444            setTransactionFlags(eTransactionNeeded);
1445        }
1446    }
1447    return err;
1448}
1449
1450status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1451{
1452    // called by ~ISurface() when all references are gone
1453    status_t err = NO_ERROR;
1454    sp<LayerBaseClient> l(layer.promote());
1455    if (l != NULL) {
1456        Mutex::Autolock _l(mStateLock);
1457        err = removeLayer_l(l);
1458        if (err == NAME_NOT_FOUND) {
1459            // The surface wasn't in the current list, which means it was
1460            // removed already, which means it is in the purgatory,
1461            // and need to be removed from there.
1462            ssize_t idx = mLayerPurgatory.remove(l);
1463            LOGE_IF(idx < 0,
1464                    "layer=%p is not in the purgatory list", l.get());
1465        }
1466        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1467                "error removing layer=%p (%s)", l.get(), strerror(-err));
1468    }
1469    return err;
1470}
1471
1472uint32_t SurfaceFlinger::setClientStateLocked(
1473        const sp<Client>& client,
1474        const layer_state_t& s)
1475{
1476    uint32_t flags = 0;
1477    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1478    if (layer != 0) {
1479        const uint32_t what = s.what;
1480        if (what & ePositionChanged) {
1481            if (layer->setPosition(s.x, s.y))
1482                flags |= eTraversalNeeded;
1483        }
1484        if (what & eLayerChanged) {
1485            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1486            if (layer->setLayer(s.z)) {
1487                mCurrentState.layersSortedByZ.removeAt(idx);
1488                mCurrentState.layersSortedByZ.add(layer);
1489                // we need traversal (state changed)
1490                // AND transaction (list changed)
1491                flags |= eTransactionNeeded|eTraversalNeeded;
1492            }
1493        }
1494        if (what & eSizeChanged) {
1495            if (layer->setSize(s.w, s.h)) {
1496                flags |= eTraversalNeeded;
1497                mResizeTransationPending = true;
1498            }
1499        }
1500        if (what & eAlphaChanged) {
1501            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1502                flags |= eTraversalNeeded;
1503        }
1504        if (what & eMatrixChanged) {
1505            if (layer->setMatrix(s.matrix))
1506                flags |= eTraversalNeeded;
1507        }
1508        if (what & eTransparentRegionChanged) {
1509            if (layer->setTransparentRegionHint(s.transparentRegion))
1510                flags |= eTraversalNeeded;
1511        }
1512        if (what & eVisibilityChanged) {
1513            if (layer->setFlags(s.flags, s.mask))
1514                flags |= eTraversalNeeded;
1515        }
1516    }
1517    return flags;
1518}
1519
1520void SurfaceFlinger::screenReleased(int dpy)
1521{
1522    // this may be called by a signal handler, we can't do too much in here
1523    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1524    signalEvent();
1525}
1526
1527void SurfaceFlinger::screenAcquired(int dpy)
1528{
1529    // this may be called by a signal handler, we can't do too much in here
1530    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1531    signalEvent();
1532}
1533
1534status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1535{
1536    const size_t SIZE = 4096;
1537    char buffer[SIZE];
1538    String8 result;
1539
1540    if (!PermissionCache::checkCallingPermission(sDump)) {
1541        snprintf(buffer, SIZE, "Permission Denial: "
1542                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1543                IPCThreadState::self()->getCallingPid(),
1544                IPCThreadState::self()->getCallingUid());
1545        result.append(buffer);
1546    } else {
1547
1548        // figure out if we're stuck somewhere
1549        const nsecs_t now = systemTime();
1550        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1551        const nsecs_t inTransaction(mDebugInTransaction);
1552        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1553        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1554
1555        // Try to get the main lock, but don't insist if we can't
1556        // (this would indicate SF is stuck, but we want to be able to
1557        // print something in dumpsys).
1558        int retry = 3;
1559        while (mStateLock.tryLock()<0 && --retry>=0) {
1560            usleep(1000000);
1561        }
1562        const bool locked(retry >= 0);
1563        if (!locked) {
1564            snprintf(buffer, SIZE,
1565                    "SurfaceFlinger appears to be unresponsive, "
1566                    "dumping anyways (no locks held)\n");
1567            result.append(buffer);
1568        }
1569
1570        /*
1571         * Dump the visible layer list
1572         */
1573        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1574        const size_t count = currentLayers.size();
1575        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1576        result.append(buffer);
1577        for (size_t i=0 ; i<count ; i++) {
1578            const sp<LayerBase>& layer(currentLayers[i]);
1579            layer->dump(result, buffer, SIZE);
1580            const Layer::State& s(layer->drawingState());
1581            s.transparentRegion.dump(result, "transparentRegion");
1582            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1583            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1584        }
1585
1586        /*
1587         * Dump the layers in the purgatory
1588         */
1589
1590        const size_t purgatorySize =  mLayerPurgatory.size();
1591        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1592        result.append(buffer);
1593        for (size_t i=0 ; i<purgatorySize ; i++) {
1594            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1595            layer->shortDump(result, buffer, SIZE);
1596        }
1597
1598        /*
1599         * Dump SurfaceFlinger global state
1600         */
1601
1602        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1603        result.append(buffer);
1604
1605        const GLExtensions& extensions(GLExtensions::getInstance());
1606        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1607                extensions.getVendor(),
1608                extensions.getRenderer(),
1609                extensions.getVersion());
1610        result.append(buffer);
1611        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1612        result.append(buffer);
1613
1614        mWormholeRegion.dump(result, "WormholeRegion");
1615        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1616        snprintf(buffer, SIZE,
1617                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1618                mFreezeDisplay?"yes":"no", mFreezeCount,
1619                mCurrentState.orientation, hw.canDraw());
1620        result.append(buffer);
1621        snprintf(buffer, SIZE,
1622                "  last eglSwapBuffers() time: %f us\n"
1623                "  last transaction time     : %f us\n",
1624                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1625        result.append(buffer);
1626
1627        if (inSwapBuffersDuration || !locked) {
1628            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1629                    inSwapBuffersDuration/1000.0);
1630            result.append(buffer);
1631        }
1632
1633        if (inTransactionDuration || !locked) {
1634            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1635                    inTransactionDuration/1000.0);
1636            result.append(buffer);
1637        }
1638
1639        /*
1640         * Dump HWComposer state
1641         */
1642        HWComposer& hwc(hw.getHwComposer());
1643        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1644                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1645                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1646        result.append(buffer);
1647        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1648
1649        /*
1650         * Dump gralloc state
1651         */
1652        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1653        alloc.dump(result);
1654        hw.dump(result);
1655
1656        if (locked) {
1657            mStateLock.unlock();
1658        }
1659    }
1660    write(fd, result.string(), result.size());
1661    return NO_ERROR;
1662}
1663
1664status_t SurfaceFlinger::onTransact(
1665    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1666{
1667    switch (code) {
1668        case CREATE_CONNECTION:
1669        case SET_TRANSACTION_STATE:
1670        case SET_ORIENTATION:
1671        case FREEZE_DISPLAY:
1672        case UNFREEZE_DISPLAY:
1673        case BOOT_FINISHED:
1674        case TURN_ELECTRON_BEAM_OFF:
1675        case TURN_ELECTRON_BEAM_ON:
1676        {
1677            // codes that require permission check
1678            IPCThreadState* ipc = IPCThreadState::self();
1679            const int pid = ipc->getCallingPid();
1680            const int uid = ipc->getCallingUid();
1681            if ((uid != AID_GRAPHICS) &&
1682                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1683                LOGE("Permission Denial: "
1684                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1685                return PERMISSION_DENIED;
1686            }
1687            break;
1688        }
1689        case CAPTURE_SCREEN:
1690        {
1691            // codes that require permission check
1692            IPCThreadState* ipc = IPCThreadState::self();
1693            const int pid = ipc->getCallingPid();
1694            const int uid = ipc->getCallingUid();
1695            if ((uid != AID_GRAPHICS) &&
1696                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1697                LOGE("Permission Denial: "
1698                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1699                return PERMISSION_DENIED;
1700            }
1701            break;
1702        }
1703    }
1704
1705    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1706    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1707        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1708        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1709            IPCThreadState* ipc = IPCThreadState::self();
1710            const int pid = ipc->getCallingPid();
1711            const int uid = ipc->getCallingUid();
1712            LOGE("Permission Denial: "
1713                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1714            return PERMISSION_DENIED;
1715        }
1716        int n;
1717        switch (code) {
1718            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1719            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1720                return NO_ERROR;
1721            case 1002:  // SHOW_UPDATES
1722                n = data.readInt32();
1723                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1724                invalidateHwcGeometry();
1725                repaintEverything();
1726                return NO_ERROR;
1727            case 1003:  // SHOW_BACKGROUND
1728                n = data.readInt32();
1729                mDebugBackground = n ? 1 : 0;
1730                return NO_ERROR;
1731            case 1004:{ // repaint everything
1732                repaintEverything();
1733                return NO_ERROR;
1734            }
1735            case 1005:{ // force transaction
1736                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1737                return NO_ERROR;
1738            }
1739            case 1006:{ // enable/disable GraphicLog
1740                int enabled = data.readInt32();
1741                GraphicLog::getInstance().setEnabled(enabled);
1742                return NO_ERROR;
1743            }
1744            case 1007: // set mFreezeCount
1745                mFreezeCount = data.readInt32();
1746                mFreezeDisplayTime = 0;
1747                return NO_ERROR;
1748            case 1008:  // toggle use of hw composer
1749                n = data.readInt32();
1750                mDebugDisableHWC = n ? 1 : 0;
1751                invalidateHwcGeometry();
1752                repaintEverything();
1753                return NO_ERROR;
1754            case 1009:  // toggle use of transform hint
1755                n = data.readInt32();
1756                mDebugDisableTransformHint = n ? 1 : 0;
1757                invalidateHwcGeometry();
1758                repaintEverything();
1759                return NO_ERROR;
1760            case 1010:  // interrogate.
1761                reply->writeInt32(0);
1762                reply->writeInt32(0);
1763                reply->writeInt32(mDebugRegion);
1764                reply->writeInt32(mDebugBackground);
1765                return NO_ERROR;
1766            case 1013: {
1767                Mutex::Autolock _l(mStateLock);
1768                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1769                reply->writeInt32(hw.getPageFlipCount());
1770            }
1771            return NO_ERROR;
1772        }
1773    }
1774    return err;
1775}
1776
1777void SurfaceFlinger::repaintEverything() {
1778    Mutex::Autolock _l(mStateLock);
1779    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1780    mDirtyRegion.set(hw.bounds());
1781    signalEvent();
1782}
1783
1784// ---------------------------------------------------------------------------
1785
1786status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1787        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1788{
1789    if (!GLExtensions::getInstance().haveFramebufferObject())
1790        return INVALID_OPERATION;
1791
1792    // get screen geometry
1793    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1794    const uint32_t hw_w = hw.getWidth();
1795    const uint32_t hw_h = hw.getHeight();
1796    GLfloat u = 1;
1797    GLfloat v = 1;
1798
1799    // make sure to clear all GL error flags
1800    while ( glGetError() != GL_NO_ERROR ) ;
1801
1802    // create a FBO
1803    GLuint name, tname;
1804    glGenTextures(1, &tname);
1805    glBindTexture(GL_TEXTURE_2D, tname);
1806    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1807            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1808    if (glGetError() != GL_NO_ERROR) {
1809        while ( glGetError() != GL_NO_ERROR ) ;
1810        GLint tw = (2 << (31 - clz(hw_w)));
1811        GLint th = (2 << (31 - clz(hw_h)));
1812        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1813                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1814        u = GLfloat(hw_w) / tw;
1815        v = GLfloat(hw_h) / th;
1816    }
1817    glGenFramebuffersOES(1, &name);
1818    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1819    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1820            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1821
1822    // redraw the screen entirely...
1823    glDisable(GL_TEXTURE_EXTERNAL_OES);
1824    glDisable(GL_TEXTURE_2D);
1825    glClearColor(0,0,0,1);
1826    glClear(GL_COLOR_BUFFER_BIT);
1827    glMatrixMode(GL_MODELVIEW);
1828    glLoadIdentity();
1829    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1830    const size_t count = layers.size();
1831    for (size_t i=0 ; i<count ; ++i) {
1832        const sp<LayerBase>& layer(layers[i]);
1833        layer->drawForSreenShot();
1834    }
1835
1836    // back to main framebuffer
1837    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1838    glDisable(GL_SCISSOR_TEST);
1839    glDeleteFramebuffersOES(1, &name);
1840
1841    *textureName = tname;
1842    *uOut = u;
1843    *vOut = v;
1844    return NO_ERROR;
1845}
1846
1847// ---------------------------------------------------------------------------
1848
1849status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1850{
1851    status_t result = PERMISSION_DENIED;
1852
1853    if (!GLExtensions::getInstance().haveFramebufferObject())
1854        return INVALID_OPERATION;
1855
1856    // get screen geometry
1857    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1858    const uint32_t hw_w = hw.getWidth();
1859    const uint32_t hw_h = hw.getHeight();
1860    const Region screenBounds(hw.getBounds());
1861
1862    GLfloat u, v;
1863    GLuint tname;
1864    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1865    if (result != NO_ERROR) {
1866        return result;
1867    }
1868
1869    GLfloat vtx[8];
1870    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1871    glBindTexture(GL_TEXTURE_2D, tname);
1872    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1873    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1874    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1875    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1876    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1877    glVertexPointer(2, GL_FLOAT, 0, vtx);
1878
1879    /*
1880     * Texture coordinate mapping
1881     *
1882     *                 u
1883     *    1 +----------+---+
1884     *      |     |    |   |  image is inverted
1885     *      |     V    |   |  w.r.t. the texture
1886     *  1-v +----------+   |  coordinates
1887     *      |              |
1888     *      |              |
1889     *      |              |
1890     *    0 +--------------+
1891     *      0              1
1892     *
1893     */
1894
1895    class s_curve_interpolator {
1896        const float nbFrames, s, v;
1897    public:
1898        s_curve_interpolator(int nbFrames, float s)
1899        : nbFrames(1.0f / (nbFrames-1)), s(s),
1900          v(1.0f + expf(-s + 0.5f*s)) {
1901        }
1902        float operator()(int f) {
1903            const float x = f * nbFrames;
1904            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1905        }
1906    };
1907
1908    class v_stretch {
1909        const GLfloat hw_w, hw_h;
1910    public:
1911        v_stretch(uint32_t hw_w, uint32_t hw_h)
1912        : hw_w(hw_w), hw_h(hw_h) {
1913        }
1914        void operator()(GLfloat* vtx, float v) {
1915            const GLfloat w = hw_w + (hw_w * v);
1916            const GLfloat h = hw_h - (hw_h * v);
1917            const GLfloat x = (hw_w - w) * 0.5f;
1918            const GLfloat y = (hw_h - h) * 0.5f;
1919            vtx[0] = x;         vtx[1] = y;
1920            vtx[2] = x;         vtx[3] = y + h;
1921            vtx[4] = x + w;     vtx[5] = y + h;
1922            vtx[6] = x + w;     vtx[7] = y;
1923        }
1924    };
1925
1926    class h_stretch {
1927        const GLfloat hw_w, hw_h;
1928    public:
1929        h_stretch(uint32_t hw_w, uint32_t hw_h)
1930        : hw_w(hw_w), hw_h(hw_h) {
1931        }
1932        void operator()(GLfloat* vtx, float v) {
1933            const GLfloat w = hw_w - (hw_w * v);
1934            const GLfloat h = 1.0f;
1935            const GLfloat x = (hw_w - w) * 0.5f;
1936            const GLfloat y = (hw_h - h) * 0.5f;
1937            vtx[0] = x;         vtx[1] = y;
1938            vtx[2] = x;         vtx[3] = y + h;
1939            vtx[4] = x + w;     vtx[5] = y + h;
1940            vtx[6] = x + w;     vtx[7] = y;
1941        }
1942    };
1943
1944    // the full animation is 24 frames
1945    char value[PROPERTY_VALUE_MAX];
1946    property_get("debug.sf.electron_frames", value, "24");
1947    int nbFrames = (atoi(value) + 1) >> 1;
1948    if (nbFrames <= 0) // just in case
1949        nbFrames = 24;
1950
1951    s_curve_interpolator itr(nbFrames, 7.5f);
1952    s_curve_interpolator itg(nbFrames, 8.0f);
1953    s_curve_interpolator itb(nbFrames, 8.5f);
1954
1955    v_stretch vverts(hw_w, hw_h);
1956
1957    glMatrixMode(GL_TEXTURE);
1958    glLoadIdentity();
1959    glMatrixMode(GL_MODELVIEW);
1960    glLoadIdentity();
1961
1962    glEnable(GL_BLEND);
1963    glBlendFunc(GL_ONE, GL_ONE);
1964    for (int i=0 ; i<nbFrames ; i++) {
1965        float x, y, w, h;
1966        const float vr = itr(i);
1967        const float vg = itg(i);
1968        const float vb = itb(i);
1969
1970        // clear screen
1971        glColorMask(1,1,1,1);
1972        glClear(GL_COLOR_BUFFER_BIT);
1973        glEnable(GL_TEXTURE_2D);
1974
1975        // draw the red plane
1976        vverts(vtx, vr);
1977        glColorMask(1,0,0,1);
1978        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1979
1980        // draw the green plane
1981        vverts(vtx, vg);
1982        glColorMask(0,1,0,1);
1983        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1984
1985        // draw the blue plane
1986        vverts(vtx, vb);
1987        glColorMask(0,0,1,1);
1988        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1989
1990        // draw the white highlight (we use the last vertices)
1991        glDisable(GL_TEXTURE_2D);
1992        glColorMask(1,1,1,1);
1993        glColor4f(vg, vg, vg, 1);
1994        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1995        hw.flip(screenBounds);
1996    }
1997
1998    h_stretch hverts(hw_w, hw_h);
1999    glDisable(GL_BLEND);
2000    glDisable(GL_TEXTURE_2D);
2001    glColorMask(1,1,1,1);
2002    for (int i=0 ; i<nbFrames ; i++) {
2003        const float v = itg(i);
2004        hverts(vtx, v);
2005        glClear(GL_COLOR_BUFFER_BIT);
2006        glColor4f(1-v, 1-v, 1-v, 1);
2007        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2008        hw.flip(screenBounds);
2009    }
2010
2011    glColorMask(1,1,1,1);
2012    glEnable(GL_SCISSOR_TEST);
2013    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2014    glDeleteTextures(1, &tname);
2015    glDisable(GL_TEXTURE_2D);
2016    glDisable(GL_BLEND);
2017    return NO_ERROR;
2018}
2019
2020status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2021{
2022    status_t result = PERMISSION_DENIED;
2023
2024    if (!GLExtensions::getInstance().haveFramebufferObject())
2025        return INVALID_OPERATION;
2026
2027
2028    // get screen geometry
2029    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2030    const uint32_t hw_w = hw.getWidth();
2031    const uint32_t hw_h = hw.getHeight();
2032    const Region screenBounds(hw.bounds());
2033
2034    GLfloat u, v;
2035    GLuint tname;
2036    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2037    if (result != NO_ERROR) {
2038        return result;
2039    }
2040
2041    // back to main framebuffer
2042    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2043    glDisable(GL_SCISSOR_TEST);
2044
2045    GLfloat vtx[8];
2046    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2047    glBindTexture(GL_TEXTURE_2D, tname);
2048    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2049    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2050    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2051    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2052    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2053    glVertexPointer(2, GL_FLOAT, 0, vtx);
2054
2055    class s_curve_interpolator {
2056        const float nbFrames, s, v;
2057    public:
2058        s_curve_interpolator(int nbFrames, float s)
2059        : nbFrames(1.0f / (nbFrames-1)), s(s),
2060          v(1.0f + expf(-s + 0.5f*s)) {
2061        }
2062        float operator()(int f) {
2063            const float x = f * nbFrames;
2064            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2065        }
2066    };
2067
2068    class v_stretch {
2069        const GLfloat hw_w, hw_h;
2070    public:
2071        v_stretch(uint32_t hw_w, uint32_t hw_h)
2072        : hw_w(hw_w), hw_h(hw_h) {
2073        }
2074        void operator()(GLfloat* vtx, float v) {
2075            const GLfloat w = hw_w + (hw_w * v);
2076            const GLfloat h = hw_h - (hw_h * v);
2077            const GLfloat x = (hw_w - w) * 0.5f;
2078            const GLfloat y = (hw_h - h) * 0.5f;
2079            vtx[0] = x;         vtx[1] = y;
2080            vtx[2] = x;         vtx[3] = y + h;
2081            vtx[4] = x + w;     vtx[5] = y + h;
2082            vtx[6] = x + w;     vtx[7] = y;
2083        }
2084    };
2085
2086    class h_stretch {
2087        const GLfloat hw_w, hw_h;
2088    public:
2089        h_stretch(uint32_t hw_w, uint32_t hw_h)
2090        : hw_w(hw_w), hw_h(hw_h) {
2091        }
2092        void operator()(GLfloat* vtx, float v) {
2093            const GLfloat w = hw_w - (hw_w * v);
2094            const GLfloat h = 1.0f;
2095            const GLfloat x = (hw_w - w) * 0.5f;
2096            const GLfloat y = (hw_h - h) * 0.5f;
2097            vtx[0] = x;         vtx[1] = y;
2098            vtx[2] = x;         vtx[3] = y + h;
2099            vtx[4] = x + w;     vtx[5] = y + h;
2100            vtx[6] = x + w;     vtx[7] = y;
2101        }
2102    };
2103
2104    // the full animation is 12 frames
2105    int nbFrames = 8;
2106    s_curve_interpolator itr(nbFrames, 7.5f);
2107    s_curve_interpolator itg(nbFrames, 8.0f);
2108    s_curve_interpolator itb(nbFrames, 8.5f);
2109
2110    h_stretch hverts(hw_w, hw_h);
2111    glDisable(GL_BLEND);
2112    glDisable(GL_TEXTURE_2D);
2113    glColorMask(1,1,1,1);
2114    for (int i=nbFrames-1 ; i>=0 ; i--) {
2115        const float v = itg(i);
2116        hverts(vtx, v);
2117        glClear(GL_COLOR_BUFFER_BIT);
2118        glColor4f(1-v, 1-v, 1-v, 1);
2119        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2120        hw.flip(screenBounds);
2121    }
2122
2123    nbFrames = 4;
2124    v_stretch vverts(hw_w, hw_h);
2125    glEnable(GL_BLEND);
2126    glBlendFunc(GL_ONE, GL_ONE);
2127    for (int i=nbFrames-1 ; i>=0 ; i--) {
2128        float x, y, w, h;
2129        const float vr = itr(i);
2130        const float vg = itg(i);
2131        const float vb = itb(i);
2132
2133        // clear screen
2134        glColorMask(1,1,1,1);
2135        glClear(GL_COLOR_BUFFER_BIT);
2136        glEnable(GL_TEXTURE_2D);
2137
2138        // draw the red plane
2139        vverts(vtx, vr);
2140        glColorMask(1,0,0,1);
2141        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2142
2143        // draw the green plane
2144        vverts(vtx, vg);
2145        glColorMask(0,1,0,1);
2146        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2147
2148        // draw the blue plane
2149        vverts(vtx, vb);
2150        glColorMask(0,0,1,1);
2151        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2152
2153        hw.flip(screenBounds);
2154    }
2155
2156    glColorMask(1,1,1,1);
2157    glEnable(GL_SCISSOR_TEST);
2158    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2159    glDeleteTextures(1, &tname);
2160    glDisable(GL_TEXTURE_2D);
2161    glDisable(GL_BLEND);
2162
2163    return NO_ERROR;
2164}
2165
2166// ---------------------------------------------------------------------------
2167
2168status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2169{
2170    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2171    if (!hw.canDraw()) {
2172        // we're already off
2173        return NO_ERROR;
2174    }
2175
2176    // turn off hwc while we're doing the animation
2177    hw.getHwComposer().disable();
2178    // and make sure to turn it back on (if needed) next time we compose
2179    invalidateHwcGeometry();
2180
2181    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2182        electronBeamOffAnimationImplLocked();
2183    }
2184
2185    // always clear the whole screen at the end of the animation
2186    glClearColor(0,0,0,1);
2187    glDisable(GL_SCISSOR_TEST);
2188    glClear(GL_COLOR_BUFFER_BIT);
2189    glEnable(GL_SCISSOR_TEST);
2190    hw.flip( Region(hw.bounds()) );
2191
2192    return NO_ERROR;
2193}
2194
2195status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2196{
2197    class MessageTurnElectronBeamOff : public MessageBase {
2198        SurfaceFlinger* flinger;
2199        int32_t mode;
2200        status_t result;
2201    public:
2202        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2203            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2204        }
2205        status_t getResult() const {
2206            return result;
2207        }
2208        virtual bool handler() {
2209            Mutex::Autolock _l(flinger->mStateLock);
2210            result = flinger->turnElectronBeamOffImplLocked(mode);
2211            return true;
2212        }
2213    };
2214
2215    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2216    status_t res = postMessageSync(msg);
2217    if (res == NO_ERROR) {
2218        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2219
2220        // work-around: when the power-manager calls us we activate the
2221        // animation. eventually, the "on" animation will be called
2222        // by the power-manager itself
2223        mElectronBeamAnimationMode = mode;
2224    }
2225    return res;
2226}
2227
2228// ---------------------------------------------------------------------------
2229
2230status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2231{
2232    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2233    if (hw.canDraw()) {
2234        // we're already on
2235        return NO_ERROR;
2236    }
2237    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2238        electronBeamOnAnimationImplLocked();
2239    }
2240
2241    // make sure to redraw the whole screen when the animation is done
2242    mDirtyRegion.set(hw.bounds());
2243    signalEvent();
2244
2245    return NO_ERROR;
2246}
2247
2248status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2249{
2250    class MessageTurnElectronBeamOn : public MessageBase {
2251        SurfaceFlinger* flinger;
2252        int32_t mode;
2253        status_t result;
2254    public:
2255        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2256            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2257        }
2258        status_t getResult() const {
2259            return result;
2260        }
2261        virtual bool handler() {
2262            Mutex::Autolock _l(flinger->mStateLock);
2263            result = flinger->turnElectronBeamOnImplLocked(mode);
2264            return true;
2265        }
2266    };
2267
2268    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2269    return NO_ERROR;
2270}
2271
2272// ---------------------------------------------------------------------------
2273
2274status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2275        sp<IMemoryHeap>* heap,
2276        uint32_t* w, uint32_t* h, PixelFormat* f,
2277        uint32_t sw, uint32_t sh,
2278        uint32_t minLayerZ, uint32_t maxLayerZ)
2279{
2280    status_t result = PERMISSION_DENIED;
2281
2282    // only one display supported for now
2283    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2284        return BAD_VALUE;
2285
2286    if (!GLExtensions::getInstance().haveFramebufferObject())
2287        return INVALID_OPERATION;
2288
2289    // get screen geometry
2290    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2291    const uint32_t hw_w = hw.getWidth();
2292    const uint32_t hw_h = hw.getHeight();
2293
2294    if ((sw > hw_w) || (sh > hw_h))
2295        return BAD_VALUE;
2296
2297    sw = (!sw) ? hw_w : sw;
2298    sh = (!sh) ? hw_h : sh;
2299    const size_t size = sw * sh * 4;
2300
2301    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2302    //        sw, sh, minLayerZ, maxLayerZ);
2303
2304    // make sure to clear all GL error flags
2305    while ( glGetError() != GL_NO_ERROR ) ;
2306
2307    // create a FBO
2308    GLuint name, tname;
2309    glGenRenderbuffersOES(1, &tname);
2310    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2311    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2312    glGenFramebuffersOES(1, &name);
2313    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2314    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2315            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2316
2317    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2318
2319    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2320
2321        // invert everything, b/c glReadPixel() below will invert the FB
2322        glViewport(0, 0, sw, sh);
2323        glScissor(0, 0, sw, sh);
2324        glEnable(GL_SCISSOR_TEST);
2325        glMatrixMode(GL_PROJECTION);
2326        glPushMatrix();
2327        glLoadIdentity();
2328        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2329        glMatrixMode(GL_MODELVIEW);
2330
2331        // redraw the screen entirely...
2332        glClearColor(0,0,0,1);
2333        glClear(GL_COLOR_BUFFER_BIT);
2334
2335        const LayerVector& layers(mDrawingState.layersSortedByZ);
2336        const size_t count = layers.size();
2337        for (size_t i=0 ; i<count ; ++i) {
2338            const sp<LayerBase>& layer(layers[i]);
2339            const uint32_t flags = layer->drawingState().flags;
2340            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2341                const uint32_t z = layer->drawingState().z;
2342                if (z >= minLayerZ && z <= maxLayerZ) {
2343                    layer->drawForSreenShot();
2344                }
2345            }
2346        }
2347
2348        // XXX: this is needed on tegra
2349        glEnable(GL_SCISSOR_TEST);
2350        glScissor(0, 0, sw, sh);
2351
2352        // check for errors and return screen capture
2353        if (glGetError() != GL_NO_ERROR) {
2354            // error while rendering
2355            result = INVALID_OPERATION;
2356        } else {
2357            // allocate shared memory large enough to hold the
2358            // screen capture
2359            sp<MemoryHeapBase> base(
2360                    new MemoryHeapBase(size, 0, "screen-capture") );
2361            void* const ptr = base->getBase();
2362            if (ptr) {
2363                // capture the screen with glReadPixels()
2364                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2365                if (glGetError() == GL_NO_ERROR) {
2366                    *heap = base;
2367                    *w = sw;
2368                    *h = sh;
2369                    *f = PIXEL_FORMAT_RGBA_8888;
2370                    result = NO_ERROR;
2371                }
2372            } else {
2373                result = NO_MEMORY;
2374            }
2375        }
2376        glEnable(GL_SCISSOR_TEST);
2377        glViewport(0, 0, hw_w, hw_h);
2378        glMatrixMode(GL_PROJECTION);
2379        glPopMatrix();
2380        glMatrixMode(GL_MODELVIEW);
2381    } else {
2382        result = BAD_VALUE;
2383    }
2384
2385    // release FBO resources
2386    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2387    glDeleteRenderbuffersOES(1, &tname);
2388    glDeleteFramebuffersOES(1, &name);
2389
2390    hw.compositionComplete();
2391
2392    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2393
2394    return result;
2395}
2396
2397
2398status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2399        sp<IMemoryHeap>* heap,
2400        uint32_t* width, uint32_t* height, PixelFormat* format,
2401        uint32_t sw, uint32_t sh,
2402        uint32_t minLayerZ, uint32_t maxLayerZ)
2403{
2404    // only one display supported for now
2405    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2406        return BAD_VALUE;
2407
2408    if (!GLExtensions::getInstance().haveFramebufferObject())
2409        return INVALID_OPERATION;
2410
2411    class MessageCaptureScreen : public MessageBase {
2412        SurfaceFlinger* flinger;
2413        DisplayID dpy;
2414        sp<IMemoryHeap>* heap;
2415        uint32_t* w;
2416        uint32_t* h;
2417        PixelFormat* f;
2418        uint32_t sw;
2419        uint32_t sh;
2420        uint32_t minLayerZ;
2421        uint32_t maxLayerZ;
2422        status_t result;
2423    public:
2424        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2425                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2426                uint32_t sw, uint32_t sh,
2427                uint32_t minLayerZ, uint32_t maxLayerZ)
2428            : flinger(flinger), dpy(dpy),
2429              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2430              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2431              result(PERMISSION_DENIED)
2432        {
2433        }
2434        status_t getResult() const {
2435            return result;
2436        }
2437        virtual bool handler() {
2438            Mutex::Autolock _l(flinger->mStateLock);
2439
2440            // if we have secure windows, never allow the screen capture
2441            if (flinger->mSecureFrameBuffer)
2442                return true;
2443
2444            result = flinger->captureScreenImplLocked(dpy,
2445                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2446
2447            return true;
2448        }
2449    };
2450
2451    sp<MessageBase> msg = new MessageCaptureScreen(this,
2452            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2453    status_t res = postMessageSync(msg);
2454    if (res == NO_ERROR) {
2455        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2456    }
2457    return res;
2458}
2459
2460// ---------------------------------------------------------------------------
2461
2462sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2463{
2464    sp<Layer> result;
2465    Mutex::Autolock _l(mStateLock);
2466    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2467    return result;
2468}
2469
2470// ---------------------------------------------------------------------------
2471
2472Client::Client(const sp<SurfaceFlinger>& flinger)
2473    : mFlinger(flinger), mNameGenerator(1)
2474{
2475}
2476
2477Client::~Client()
2478{
2479    const size_t count = mLayers.size();
2480    for (size_t i=0 ; i<count ; i++) {
2481        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2482        if (layer != 0) {
2483            mFlinger->removeLayer(layer);
2484        }
2485    }
2486}
2487
2488status_t Client::initCheck() const {
2489    return NO_ERROR;
2490}
2491
2492size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2493{
2494    Mutex::Autolock _l(mLock);
2495    size_t name = mNameGenerator++;
2496    mLayers.add(name, layer);
2497    return name;
2498}
2499
2500void Client::detachLayer(const LayerBaseClient* layer)
2501{
2502    Mutex::Autolock _l(mLock);
2503    // we do a linear search here, because this doesn't happen often
2504    const size_t count = mLayers.size();
2505    for (size_t i=0 ; i<count ; i++) {
2506        if (mLayers.valueAt(i) == layer) {
2507            mLayers.removeItemsAt(i, 1);
2508            break;
2509        }
2510    }
2511}
2512sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2513{
2514    Mutex::Autolock _l(mLock);
2515    sp<LayerBaseClient> lbc;
2516    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2517    if (layer != 0) {
2518        lbc = layer.promote();
2519        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2520    }
2521    return lbc;
2522}
2523
2524
2525status_t Client::onTransact(
2526    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2527{
2528    // these must be checked
2529     IPCThreadState* ipc = IPCThreadState::self();
2530     const int pid = ipc->getCallingPid();
2531     const int uid = ipc->getCallingUid();
2532     const int self_pid = getpid();
2533     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2534         // we're called from a different process, do the real check
2535         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2536         {
2537             LOGE("Permission Denial: "
2538                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2539             return PERMISSION_DENIED;
2540         }
2541     }
2542     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2543}
2544
2545
2546sp<ISurface> Client::createSurface(
2547        ISurfaceComposerClient::surface_data_t* params,
2548        const String8& name,
2549        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2550        uint32_t flags)
2551{
2552    /*
2553     * createSurface must be called from the GL thread so that it can
2554     * have access to the GL context.
2555     */
2556
2557    class MessageCreateSurface : public MessageBase {
2558        sp<ISurface> result;
2559        SurfaceFlinger* flinger;
2560        ISurfaceComposerClient::surface_data_t* params;
2561        Client* client;
2562        const String8& name;
2563        DisplayID display;
2564        uint32_t w, h;
2565        PixelFormat format;
2566        uint32_t flags;
2567    public:
2568        MessageCreateSurface(SurfaceFlinger* flinger,
2569                ISurfaceComposerClient::surface_data_t* params,
2570                const String8& name, Client* client,
2571                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2572                uint32_t flags)
2573            : flinger(flinger), params(params), client(client), name(name),
2574              display(display), w(w), h(h), format(format), flags(flags)
2575        {
2576        }
2577        sp<ISurface> getResult() const { return result; }
2578        virtual bool handler() {
2579            result = flinger->createSurface(params, name, client,
2580                    display, w, h, format, flags);
2581            return true;
2582        }
2583    };
2584
2585    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2586            params, name, this, display, w, h, format, flags);
2587    mFlinger->postMessageSync(msg);
2588    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2589}
2590status_t Client::destroySurface(SurfaceID sid) {
2591    return mFlinger->removeSurface(this, sid);
2592}
2593
2594// ---------------------------------------------------------------------------
2595
2596GraphicBufferAlloc::GraphicBufferAlloc() {}
2597
2598GraphicBufferAlloc::~GraphicBufferAlloc() {}
2599
2600sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2601        PixelFormat format, uint32_t usage, status_t* error) {
2602    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2603    status_t err = graphicBuffer->initCheck();
2604    *error = err;
2605    if (err != 0 || graphicBuffer->handle == 0) {
2606        if (err == NO_MEMORY) {
2607            GraphicBuffer::dumpAllocationsToSystemLog();
2608        }
2609        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2610             "failed (%s), handle=%p",
2611                w, h, strerror(-err), graphicBuffer->handle);
2612        return 0;
2613    }
2614    return graphicBuffer;
2615}
2616
2617// ---------------------------------------------------------------------------
2618
2619GraphicPlane::GraphicPlane()
2620    : mHw(0)
2621{
2622}
2623
2624GraphicPlane::~GraphicPlane() {
2625    delete mHw;
2626}
2627
2628bool GraphicPlane::initialized() const {
2629    return mHw ? true : false;
2630}
2631
2632int GraphicPlane::getWidth() const {
2633    return mWidth;
2634}
2635
2636int GraphicPlane::getHeight() const {
2637    return mHeight;
2638}
2639
2640void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2641{
2642    mHw = hw;
2643
2644    // initialize the display orientation transform.
2645    // it's a constant that should come from the display driver.
2646    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2647    char property[PROPERTY_VALUE_MAX];
2648    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2649        //displayOrientation
2650        switch (atoi(property)) {
2651        case 90:
2652            displayOrientation = ISurfaceComposer::eOrientation90;
2653            break;
2654        case 270:
2655            displayOrientation = ISurfaceComposer::eOrientation270;
2656            break;
2657        }
2658    }
2659
2660    const float w = hw->getWidth();
2661    const float h = hw->getHeight();
2662    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2663            &mDisplayTransform);
2664    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2665        mDisplayWidth = h;
2666        mDisplayHeight = w;
2667    } else {
2668        mDisplayWidth = w;
2669        mDisplayHeight = h;
2670    }
2671
2672    setOrientation(ISurfaceComposer::eOrientationDefault);
2673}
2674
2675status_t GraphicPlane::orientationToTransfrom(
2676        int orientation, int w, int h, Transform* tr)
2677{
2678    uint32_t flags = 0;
2679    switch (orientation) {
2680    case ISurfaceComposer::eOrientationDefault:
2681        flags = Transform::ROT_0;
2682        break;
2683    case ISurfaceComposer::eOrientation90:
2684        flags = Transform::ROT_90;
2685        break;
2686    case ISurfaceComposer::eOrientation180:
2687        flags = Transform::ROT_180;
2688        break;
2689    case ISurfaceComposer::eOrientation270:
2690        flags = Transform::ROT_270;
2691        break;
2692    default:
2693        return BAD_VALUE;
2694    }
2695    tr->set(flags, w, h);
2696    return NO_ERROR;
2697}
2698
2699status_t GraphicPlane::setOrientation(int orientation)
2700{
2701    // If the rotation can be handled in hardware, this is where
2702    // the magic should happen.
2703
2704    const DisplayHardware& hw(displayHardware());
2705    const float w = mDisplayWidth;
2706    const float h = mDisplayHeight;
2707    mWidth = int(w);
2708    mHeight = int(h);
2709
2710    Transform orientationTransform;
2711    GraphicPlane::orientationToTransfrom(orientation, w, h,
2712            &orientationTransform);
2713    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2714        mWidth = int(h);
2715        mHeight = int(w);
2716    }
2717
2718    mOrientation = orientation;
2719    mGlobalTransform = mDisplayTransform * orientationTransform;
2720    return NO_ERROR;
2721}
2722
2723const DisplayHardware& GraphicPlane::displayHardware() const {
2724    return *mHw;
2725}
2726
2727DisplayHardware& GraphicPlane::editDisplayHardware() {
2728    return *mHw;
2729}
2730
2731const Transform& GraphicPlane::transform() const {
2732    return mGlobalTransform;
2733}
2734
2735EGLDisplay GraphicPlane::getEGLDisplay() const {
2736    return mHw->getEGLDisplay();
2737}
2738
2739// ---------------------------------------------------------------------------
2740
2741}; // namespace android
2742