SurfaceFlinger.cpp revision c492e67810814bf86301abffe1d31598b775cf45 
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 (UNLIKELY(mHwWorkListDirty)) {
449        // build the h/w work list
450        handleWorkList();
451    }
452
453    const DisplayHardware& hw(graphicPlane(0).displayHardware());
454    if (LIKELY(hw.canDraw())) {
455        // repaint the framebuffer (if needed)
456
457        const int index = hw.getCurrentBufferIndex();
458        GraphicLog& logger(GraphicLog::getInstance());
459
460        logger.log(GraphicLog::SF_REPAINT, index);
461        handleRepaint();
462
463        // inform the h/w that we're done compositing
464        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
465        hw.compositionComplete();
466
467        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
468        postFramebuffer();
469
470        logger.log(GraphicLog::SF_REPAINT_DONE, index);
471    } else {
472        // pretend we did the post
473        hw.compositionComplete();
474        usleep(16667); // 60 fps period
475    }
476    return true;
477}
478
479void SurfaceFlinger::postFramebuffer()
480{
481    const DisplayHardware& hw(graphicPlane(0).displayHardware());
482    const nsecs_t now = systemTime();
483    mDebugInSwapBuffers = now;
484    hw.flip(mSwapRegion);
485    mLastSwapBufferTime = systemTime() - now;
486    mDebugInSwapBuffers = 0;
487    mSwapRegion.clear();
488}
489
490void SurfaceFlinger::handleConsoleEvents()
491{
492    // something to do with the console
493    const DisplayHardware& hw = graphicPlane(0).displayHardware();
494
495    int what = android_atomic_and(0, &mConsoleSignals);
496    if (what & eConsoleAcquired) {
497        hw.acquireScreen();
498        // this is a temporary work-around, eventually this should be called
499        // by the power-manager
500        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
501    }
502
503    if (what & eConsoleReleased) {
504        if (hw.isScreenAcquired()) {
505            hw.releaseScreen();
506        }
507    }
508
509    mDirtyRegion.set(hw.bounds());
510}
511
512void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
513{
514    Mutex::Autolock _l(mStateLock);
515    const nsecs_t now = systemTime();
516    mDebugInTransaction = now;
517
518    // Here we're guaranteed that some transaction flags are set
519    // so we can call handleTransactionLocked() unconditionally.
520    // We call getTransactionFlags(), which will also clear the flags,
521    // with mStateLock held to guarantee that mCurrentState won't change
522    // until the transaction is committed.
523
524    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
525    transactionFlags = getTransactionFlags(mask);
526    handleTransactionLocked(transactionFlags);
527
528    mLastTransactionTime = systemTime() - now;
529    mDebugInTransaction = 0;
530    invalidateHwcGeometry();
531    // here the transaction has been committed
532}
533
534void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
535{
536    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
537    const size_t count = currentLayers.size();
538
539    /*
540     * Traversal of the children
541     * (perform the transaction for each of them if needed)
542     */
543
544    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
545    if (layersNeedTransaction) {
546        for (size_t i=0 ; i<count ; i++) {
547            const sp<LayerBase>& layer = currentLayers[i];
548            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
549            if (!trFlags) continue;
550
551            const uint32_t flags = layer->doTransaction(0);
552            if (flags & Layer::eVisibleRegion)
553                mVisibleRegionsDirty = true;
554        }
555    }
556
557    /*
558     * Perform our own transaction if needed
559     */
560
561    if (transactionFlags & eTransactionNeeded) {
562        if (mCurrentState.orientation != mDrawingState.orientation) {
563            // the orientation has changed, recompute all visible regions
564            // and invalidate everything.
565
566            const int dpy = 0;
567            const int orientation = mCurrentState.orientation;
568            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
569            GraphicPlane& plane(graphicPlane(dpy));
570            plane.setOrientation(orientation);
571
572            // update the shared control block
573            const DisplayHardware& hw(plane.displayHardware());
574            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
575            dcblk->orientation = orientation;
576            dcblk->w = plane.getWidth();
577            dcblk->h = plane.getHeight();
578
579            mVisibleRegionsDirty = true;
580            mDirtyRegion.set(hw.bounds());
581        }
582
583        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
584            // freezing or unfreezing the display -> trigger animation if needed
585            mFreezeDisplay = mCurrentState.freezeDisplay;
586            if (mFreezeDisplay)
587                 mFreezeDisplayTime = 0;
588        }
589
590        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
591            // layers have been added
592            mVisibleRegionsDirty = true;
593        }
594
595        // some layers might have been removed, so
596        // we need to update the regions they're exposing.
597        if (mLayersRemoved) {
598            mLayersRemoved = false;
599            mVisibleRegionsDirty = true;
600            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
601            const size_t count = previousLayers.size();
602            for (size_t i=0 ; i<count ; i++) {
603                const sp<LayerBase>& layer(previousLayers[i]);
604                if (currentLayers.indexOf( layer ) < 0) {
605                    // this layer is not visible anymore
606                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
607                }
608            }
609        }
610    }
611
612    commitTransaction();
613}
614
615sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
616{
617    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
618}
619
620void SurfaceFlinger::computeVisibleRegions(
621    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
622{
623    const GraphicPlane& plane(graphicPlane(0));
624    const Transform& planeTransform(plane.transform());
625    const DisplayHardware& hw(plane.displayHardware());
626    const Region screenRegion(hw.bounds());
627
628    Region aboveOpaqueLayers;
629    Region aboveCoveredLayers;
630    Region dirty;
631
632    bool secureFrameBuffer = false;
633
634    size_t i = currentLayers.size();
635    while (i--) {
636        const sp<LayerBase>& layer = currentLayers[i];
637        layer->validateVisibility(planeTransform);
638
639        // start with the whole surface at its current location
640        const Layer::State& s(layer->drawingState());
641
642        /*
643         * opaqueRegion: area of a surface that is fully opaque.
644         */
645        Region opaqueRegion;
646
647        /*
648         * visibleRegion: area of a surface that is visible on screen
649         * and not fully transparent. This is essentially the layer's
650         * footprint minus the opaque regions above it.
651         * Areas covered by a translucent surface are considered visible.
652         */
653        Region visibleRegion;
654
655        /*
656         * coveredRegion: area of a surface that is covered by all
657         * visible regions above it (which includes the translucent areas).
658         */
659        Region coveredRegion;
660
661
662        // handle hidden surfaces by setting the visible region to empty
663        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
664            const bool translucent = !layer->isOpaque();
665            const Rect bounds(layer->visibleBounds());
666            visibleRegion.set(bounds);
667            visibleRegion.andSelf(screenRegion);
668            if (!visibleRegion.isEmpty()) {
669                // Remove the transparent area from the visible region
670                if (translucent) {
671                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
672                }
673
674                // compute the opaque region
675                const int32_t layerOrientation = layer->getOrientation();
676                if (s.alpha==255 && !translucent &&
677                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
678                    // the opaque region is the layer's footprint
679                    opaqueRegion = visibleRegion;
680                }
681            }
682        }
683
684        // Clip the covered region to the visible region
685        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
686
687        // Update aboveCoveredLayers for next (lower) layer
688        aboveCoveredLayers.orSelf(visibleRegion);
689
690        // subtract the opaque region covered by the layers above us
691        visibleRegion.subtractSelf(aboveOpaqueLayers);
692
693        // compute this layer's dirty region
694        if (layer->contentDirty) {
695            // we need to invalidate the whole region
696            dirty = visibleRegion;
697            // as well, as the old visible region
698            dirty.orSelf(layer->visibleRegionScreen);
699            layer->contentDirty = false;
700        } else {
701            /* compute the exposed region:
702             *   the exposed region consists of two components:
703             *   1) what's VISIBLE now and was COVERED before
704             *   2) what's EXPOSED now less what was EXPOSED before
705             *
706             * note that (1) is conservative, we start with the whole
707             * visible region but only keep what used to be covered by
708             * something -- which mean it may have been exposed.
709             *
710             * (2) handles areas that were not covered by anything but got
711             * exposed because of a resize.
712             */
713            const Region newExposed = visibleRegion - coveredRegion;
714            const Region oldVisibleRegion = layer->visibleRegionScreen;
715            const Region oldCoveredRegion = layer->coveredRegionScreen;
716            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
717            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
718        }
719        dirty.subtractSelf(aboveOpaqueLayers);
720
721        // accumulate to the screen dirty region
722        dirtyRegion.orSelf(dirty);
723
724        // Update aboveOpaqueLayers for next (lower) layer
725        aboveOpaqueLayers.orSelf(opaqueRegion);
726
727        // Store the visible region is screen space
728        layer->setVisibleRegion(visibleRegion);
729        layer->setCoveredRegion(coveredRegion);
730
731        // If a secure layer is partially visible, lock-down the screen!
732        if (layer->isSecure() && !visibleRegion.isEmpty()) {
733            secureFrameBuffer = true;
734        }
735    }
736
737    // invalidate the areas where a layer was removed
738    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
739    mDirtyRegionRemovedLayer.clear();
740
741    mSecureFrameBuffer = secureFrameBuffer;
742    opaqueRegion = aboveOpaqueLayers;
743}
744
745
746void SurfaceFlinger::commitTransaction()
747{
748    mDrawingState = mCurrentState;
749    mResizeTransationPending = false;
750    mTransactionCV.broadcast();
751}
752
753void SurfaceFlinger::handlePageFlip()
754{
755    bool visibleRegions = mVisibleRegionsDirty;
756    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
757    visibleRegions |= lockPageFlip(currentLayers);
758
759        const DisplayHardware& hw = graphicPlane(0).displayHardware();
760        const Region screenRegion(hw.bounds());
761        if (visibleRegions) {
762            Region opaqueRegion;
763            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
764
765            /*
766             *  rebuild the visible layer list
767             */
768            const size_t count = currentLayers.size();
769            mVisibleLayersSortedByZ.clear();
770            mVisibleLayersSortedByZ.setCapacity(count);
771            for (size_t i=0 ; i<count ; i++) {
772                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
773                    mVisibleLayersSortedByZ.add(currentLayers[i]);
774            }
775
776            mWormholeRegion = screenRegion.subtract(opaqueRegion);
777            mVisibleRegionsDirty = false;
778            invalidateHwcGeometry();
779        }
780
781    unlockPageFlip(currentLayers);
782    mDirtyRegion.andSelf(screenRegion);
783}
784
785void SurfaceFlinger::invalidateHwcGeometry()
786{
787    mHwWorkListDirty = true;
788}
789
790bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
791{
792    bool recomputeVisibleRegions = false;
793    size_t count = currentLayers.size();
794    sp<LayerBase> const* layers = currentLayers.array();
795    for (size_t i=0 ; i<count ; i++) {
796        const sp<LayerBase>& layer(layers[i]);
797        layer->lockPageFlip(recomputeVisibleRegions);
798    }
799    return recomputeVisibleRegions;
800}
801
802void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
803{
804    const GraphicPlane& plane(graphicPlane(0));
805    const Transform& planeTransform(plane.transform());
806    size_t count = currentLayers.size();
807    sp<LayerBase> const* layers = currentLayers.array();
808    for (size_t i=0 ; i<count ; i++) {
809        const sp<LayerBase>& layer(layers[i]);
810        layer->unlockPageFlip(planeTransform, mDirtyRegion);
811    }
812}
813
814void SurfaceFlinger::handleWorkList()
815{
816    mHwWorkListDirty = false;
817    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
818    if (hwc.initCheck() == NO_ERROR) {
819        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
820        const size_t count = currentLayers.size();
821        hwc.createWorkList(count);
822        hwc_layer_t* const cur(hwc.getLayers());
823        for (size_t i=0 ; cur && i<count ; i++) {
824            currentLayers[i]->setGeometry(&cur[i]);
825            if (mDebugDisableHWC || mDebugRegion) {
826                cur[i].compositionType = HWC_FRAMEBUFFER;
827                cur[i].flags |= HWC_SKIP_LAYER;
828            }
829        }
830    }
831}
832
833void SurfaceFlinger::handleRepaint()
834{
835    // compute the invalid region
836    mSwapRegion.orSelf(mDirtyRegion);
837
838    if (UNLIKELY(mDebugRegion)) {
839        debugFlashRegions();
840    }
841
842    // set the frame buffer
843    const DisplayHardware& hw(graphicPlane(0).displayHardware());
844    glMatrixMode(GL_MODELVIEW);
845    glLoadIdentity();
846
847    uint32_t flags = hw.getFlags();
848    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
849        (flags & DisplayHardware::BUFFER_PRESERVED))
850    {
851        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
852        // takes a rectangle, we must make sure to update that whole
853        // rectangle in that case
854        if (flags & DisplayHardware::SWAP_RECTANGLE) {
855            // TODO: we really should be able to pass a region to
856            // SWAP_RECTANGLE so that we don't have to redraw all this.
857            mDirtyRegion.set(mSwapRegion.bounds());
858        } else {
859            // in the BUFFER_PRESERVED case, obviously, we can update only
860            // what's needed and nothing more.
861            // NOTE: this is NOT a common case, as preserving the backbuffer
862            // is costly and usually involves copying the whole update back.
863        }
864    } else {
865        if (flags & DisplayHardware::PARTIAL_UPDATES) {
866            // We need to redraw the rectangle that will be updated
867            // (pushed to the framebuffer).
868            // This is needed because PARTIAL_UPDATES only takes one
869            // rectangle instead of a region (see DisplayHardware::flip())
870            mDirtyRegion.set(mSwapRegion.bounds());
871        } else {
872            // we need to redraw everything (the whole screen)
873            mDirtyRegion.set(hw.bounds());
874            mSwapRegion = mDirtyRegion;
875        }
876    }
877
878    setupHardwareComposer(mDirtyRegion);
879    composeSurfaces(mDirtyRegion);
880
881    // update the swap region and clear the dirty region
882    mSwapRegion.orSelf(mDirtyRegion);
883    mDirtyRegion.clear();
884}
885
886void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
887{
888    const DisplayHardware& hw(graphicPlane(0).displayHardware());
889    HWComposer& hwc(hw.getHwComposer());
890    hwc_layer_t* const cur(hwc.getLayers());
891    if (!cur) {
892        return;
893    }
894
895    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
896    size_t count = layers.size();
897
898    LOGE_IF(hwc.getNumLayers() != count,
899            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
900            hwc.getNumLayers(), count);
901
902    // just to be extra-safe, use the smallest count
903    if (hwc.initCheck() == NO_ERROR) {
904        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
905    }
906
907    /*
908     *  update the per-frame h/w composer data for each layer
909     *  and build the transparent region of the FB
910     */
911    for (size_t i=0 ; i<count ; i++) {
912        const sp<LayerBase>& layer(layers[i]);
913        layer->setPerFrameData(&cur[i]);
914    }
915    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
916    status_t err = hwc.prepare();
917    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
918
919    if (err == NO_ERROR) {
920        // what's happening here is tricky.
921        // we want to clear all the layers with the CLEAR_FB flags
922        // that are opaque.
923        // however, since some GPU are efficient at preserving
924        // the backbuffer, we want to take advantage of that so we do the
925        // clear only in the dirty region (other areas will be preserved
926        // on those GPUs).
927        //   NOTE: on non backbuffer preserving GPU, the dirty region
928        //   has already been expanded as needed, so the code is correct
929        //   there too.
930        //
931        // However, the content of the framebuffer cannot be trusted when
932        // we switch to/from FB/OVERLAY, in which case we need to
933        // expand the dirty region to those areas too.
934        //
935        // Note also that there is a special case when switching from
936        // "no layers in FB" to "some layers in FB", where we need to redraw
937        // the entire FB, since some areas might contain uninitialized
938        // data.
939        //
940        // Also we want to make sure to not clear areas that belong to
941        // layers above that won't redraw (we would just erasing them),
942        // that is, we can't erase anything outside the dirty region.
943
944        Region transparent;
945
946        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
947            transparent.set(hw.getBounds());
948            dirtyInOut = transparent;
949        } else {
950            for (size_t i=0 ; i<count ; i++) {
951                const sp<LayerBase>& layer(layers[i]);
952                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
953                    transparent.orSelf(layer->visibleRegionScreen);
954                }
955                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
956                if (isOverlay != layer->isOverlay()) {
957                    // we transitioned to/from overlay, so add this layer
958                    // to the dirty region so the framebuffer can be either
959                    // cleared or redrawn.
960                    dirtyInOut.orSelf(layer->visibleRegionScreen);
961                }
962                layer->setOverlay(isOverlay);
963            }
964            // don't erase stuff outside the dirty region
965            transparent.andSelf(dirtyInOut);
966        }
967
968        /*
969         *  clear the area of the FB that need to be transparent
970         */
971        if (!transparent.isEmpty()) {
972            glClearColor(0,0,0,0);
973            Region::const_iterator it = transparent.begin();
974            Region::const_iterator const end = transparent.end();
975            const int32_t height = hw.getHeight();
976            while (it != end) {
977                const Rect& r(*it++);
978                const GLint sy = height - (r.top + r.height());
979                glScissor(r.left, sy, r.width(), r.height());
980                glClear(GL_COLOR_BUFFER_BIT);
981            }
982        }
983    }
984}
985
986void SurfaceFlinger::composeSurfaces(const Region& dirty)
987{
988    const DisplayHardware& hw(graphicPlane(0).displayHardware());
989    HWComposer& hwc(hw.getHwComposer());
990
991    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
992    if (UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
993        // should never happen unless the window manager has a bug
994        // draw something...
995        drawWormhole();
996    }
997
998    /*
999     * and then, render the layers targeted at the framebuffer
1000     */
1001    hwc_layer_t* const cur(hwc.getLayers());
1002    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1003    size_t count = layers.size();
1004    for (size_t i=0 ; i<count ; i++) {
1005        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1006            continue;
1007        }
1008        const sp<LayerBase>& layer(layers[i]);
1009        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1010        if (!clip.isEmpty()) {
1011            layer->draw(clip);
1012        }
1013    }
1014}
1015
1016void SurfaceFlinger::debugFlashRegions()
1017{
1018    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1019    const uint32_t flags = hw.getFlags();
1020    const int32_t height = hw.getHeight();
1021    if (mSwapRegion.isEmpty()) {
1022        return;
1023    }
1024
1025    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1026            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1027        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1028                mDirtyRegion.bounds() : hw.bounds());
1029        composeSurfaces(repaint);
1030    }
1031
1032    glDisable(GL_TEXTURE_EXTERNAL_OES);
1033    glDisable(GL_TEXTURE_2D);
1034    glDisable(GL_BLEND);
1035    glDisable(GL_SCISSOR_TEST);
1036
1037    static int toggle = 0;
1038    toggle = 1 - toggle;
1039    if (toggle) {
1040        glColor4f(1, 0, 1, 1);
1041    } else {
1042        glColor4f(1, 1, 0, 1);
1043    }
1044
1045    Region::const_iterator it = mDirtyRegion.begin();
1046    Region::const_iterator const end = mDirtyRegion.end();
1047    while (it != end) {
1048        const Rect& r = *it++;
1049        GLfloat vertices[][2] = {
1050                { r.left,  height - r.top },
1051                { r.left,  height - r.bottom },
1052                { r.right, height - r.bottom },
1053                { r.right, height - r.top }
1054        };
1055        glVertexPointer(2, GL_FLOAT, 0, vertices);
1056        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1057    }
1058
1059    hw.flip(mSwapRegion);
1060
1061    if (mDebugRegion > 1)
1062        usleep(mDebugRegion * 1000);
1063
1064    glEnable(GL_SCISSOR_TEST);
1065}
1066
1067void SurfaceFlinger::drawWormhole() const
1068{
1069    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1070    if (region.isEmpty())
1071        return;
1072
1073    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1074    const int32_t width = hw.getWidth();
1075    const int32_t height = hw.getHeight();
1076
1077    if (LIKELY(!mDebugBackground)) {
1078        glClearColor(0,0,0,0);
1079        Region::const_iterator it = region.begin();
1080        Region::const_iterator const end = region.end();
1081        while (it != end) {
1082            const Rect& r = *it++;
1083            const GLint sy = height - (r.top + r.height());
1084            glScissor(r.left, sy, r.width(), r.height());
1085            glClear(GL_COLOR_BUFFER_BIT);
1086        }
1087    } else {
1088        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1089                { width, height }, { 0, height }  };
1090        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1091
1092        glVertexPointer(2, GL_SHORT, 0, vertices);
1093        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1094        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1095
1096        glDisable(GL_TEXTURE_EXTERNAL_OES);
1097        glEnable(GL_TEXTURE_2D);
1098        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1099        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1100        glMatrixMode(GL_TEXTURE);
1101        glLoadIdentity();
1102
1103        glDisable(GL_BLEND);
1104
1105        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1106        Region::const_iterator it = region.begin();
1107        Region::const_iterator const end = region.end();
1108        while (it != end) {
1109            const Rect& r = *it++;
1110            const GLint sy = height - (r.top + r.height());
1111            glScissor(r.left, sy, r.width(), r.height());
1112            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1113        }
1114        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1115        glDisable(GL_TEXTURE_2D);
1116        glLoadIdentity();
1117        glMatrixMode(GL_MODELVIEW);
1118    }
1119}
1120
1121void SurfaceFlinger::debugShowFPS() const
1122{
1123    static int mFrameCount;
1124    static int mLastFrameCount = 0;
1125    static nsecs_t mLastFpsTime = 0;
1126    static float mFps = 0;
1127    mFrameCount++;
1128    nsecs_t now = systemTime();
1129    nsecs_t diff = now - mLastFpsTime;
1130    if (diff > ms2ns(250)) {
1131        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1132        mLastFpsTime = now;
1133        mLastFrameCount = mFrameCount;
1134    }
1135    // XXX: mFPS has the value we want
1136 }
1137
1138status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1139{
1140    Mutex::Autolock _l(mStateLock);
1141    addLayer_l(layer);
1142    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1143    return NO_ERROR;
1144}
1145
1146status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1147{
1148    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1149    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1150}
1151
1152ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1153        const sp<LayerBaseClient>& lbc)
1154{
1155    // attach this layer to the client
1156    size_t name = client->attachLayer(lbc);
1157
1158    Mutex::Autolock _l(mStateLock);
1159
1160    // add this layer to the current state list
1161    addLayer_l(lbc);
1162
1163    return ssize_t(name);
1164}
1165
1166status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1167{
1168    Mutex::Autolock _l(mStateLock);
1169    status_t err = purgatorizeLayer_l(layer);
1170    if (err == NO_ERROR)
1171        setTransactionFlags(eTransactionNeeded);
1172    return err;
1173}
1174
1175status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1176{
1177    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1178    if (lbc != 0) {
1179        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1180    }
1181    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1182    if (index >= 0) {
1183        mLayersRemoved = true;
1184        return NO_ERROR;
1185    }
1186    return status_t(index);
1187}
1188
1189status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1190{
1191    // First add the layer to the purgatory list, which makes sure it won't
1192    // go away, then remove it from the main list (through a transaction).
1193    ssize_t err = removeLayer_l(layerBase);
1194    if (err >= 0) {
1195        mLayerPurgatory.add(layerBase);
1196    }
1197
1198    layerBase->onRemoved();
1199
1200    // it's possible that we don't find a layer, because it might
1201    // have been destroyed already -- this is not technically an error
1202    // from the user because there is a race between Client::destroySurface(),
1203    // ~Client() and ~ISurface().
1204    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1205}
1206
1207status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1208{
1209    layer->forceVisibilityTransaction();
1210    setTransactionFlags(eTraversalNeeded);
1211    return NO_ERROR;
1212}
1213
1214uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1215{
1216    return android_atomic_release_load(&mTransactionFlags);
1217}
1218
1219uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1220{
1221    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1222}
1223
1224uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1225{
1226    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1227    if ((old & flags)==0) { // wake the server up
1228        signalEvent();
1229    }
1230    return old;
1231}
1232
1233
1234void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1235        int orientation) {
1236    Mutex::Autolock _l(mStateLock);
1237
1238    uint32_t flags = 0;
1239    if (mCurrentState.orientation != orientation) {
1240        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1241            mCurrentState.orientation = orientation;
1242            flags |= eTransactionNeeded;
1243            mResizeTransationPending = true;
1244        } else if (orientation != eOrientationUnchanged) {
1245            LOGW("setTransactionState: ignoring unrecognized orientation: %d",
1246                    orientation);
1247        }
1248    }
1249
1250    const size_t count = state.size();
1251    for (size_t i=0 ; i<count ; i++) {
1252        const ComposerState& s(state[i]);
1253        sp<Client> client( static_cast<Client *>(s.client.get()) );
1254        flags |= setClientStateLocked(client, s.state);
1255    }
1256    if (flags) {
1257        setTransactionFlags(flags);
1258    }
1259
1260    signalEvent();
1261
1262    // if there is a transaction with a resize, wait for it to
1263    // take effect before returning.
1264    while (mResizeTransationPending) {
1265        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1266        if (CC_UNLIKELY(err != NO_ERROR)) {
1267            // just in case something goes wrong in SF, return to the
1268            // called after a few seconds.
1269            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1270            mResizeTransationPending = false;
1271            break;
1272        }
1273    }
1274}
1275
1276status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1277{
1278    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1279        return BAD_VALUE;
1280
1281    Mutex::Autolock _l(mStateLock);
1282    mCurrentState.freezeDisplay = 1;
1283    setTransactionFlags(eTransactionNeeded);
1284
1285    // flags is intended to communicate some sort of animation behavior
1286    // (for instance fading)
1287    return NO_ERROR;
1288}
1289
1290status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1291{
1292    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1293        return BAD_VALUE;
1294
1295    Mutex::Autolock _l(mStateLock);
1296    mCurrentState.freezeDisplay = 0;
1297    setTransactionFlags(eTransactionNeeded);
1298
1299    // flags is intended to communicate some sort of animation behavior
1300    // (for instance fading)
1301    return NO_ERROR;
1302}
1303
1304int SurfaceFlinger::setOrientation(DisplayID dpy,
1305        int orientation, uint32_t flags)
1306{
1307    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1308        return BAD_VALUE;
1309
1310    Mutex::Autolock _l(mStateLock);
1311    if (mCurrentState.orientation != orientation) {
1312        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1313            mCurrentState.orientationFlags = flags;
1314            mCurrentState.orientation = orientation;
1315            setTransactionFlags(eTransactionNeeded);
1316            mTransactionCV.wait(mStateLock);
1317        } else {
1318            orientation = BAD_VALUE;
1319        }
1320    }
1321    return orientation;
1322}
1323
1324sp<ISurface> SurfaceFlinger::createSurface(
1325        ISurfaceComposerClient::surface_data_t* params,
1326        const String8& name,
1327        const sp<Client>& client,
1328        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1329        uint32_t flags)
1330{
1331    sp<LayerBaseClient> layer;
1332    sp<ISurface> surfaceHandle;
1333
1334    if (int32_t(w|h) < 0) {
1335        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1336                int(w), int(h));
1337        return surfaceHandle;
1338    }
1339
1340    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1341    sp<Layer> normalLayer;
1342    switch (flags & eFXSurfaceMask) {
1343        case eFXSurfaceNormal:
1344            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1345            layer = normalLayer;
1346            break;
1347        case eFXSurfaceBlur:
1348            // for now we treat Blur as Dim, until we can implement it
1349            // efficiently.
1350        case eFXSurfaceDim:
1351            layer = createDimSurface(client, d, w, h, flags);
1352            break;
1353    }
1354
1355    if (layer != 0) {
1356        layer->initStates(w, h, flags);
1357        layer->setName(name);
1358        ssize_t token = addClientLayer(client, layer);
1359
1360        surfaceHandle = layer->getSurface();
1361        if (surfaceHandle != 0) {
1362            params->token = token;
1363            params->identity = layer->getIdentity();
1364            if (normalLayer != 0) {
1365                Mutex::Autolock _l(mStateLock);
1366                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1367            }
1368        }
1369
1370        setTransactionFlags(eTransactionNeeded);
1371    }
1372
1373    return surfaceHandle;
1374}
1375
1376sp<Layer> SurfaceFlinger::createNormalSurface(
1377        const sp<Client>& client, DisplayID display,
1378        uint32_t w, uint32_t h, uint32_t flags,
1379        PixelFormat& format)
1380{
1381    // initialize the surfaces
1382    switch (format) { // TODO: take h/w into account
1383    case PIXEL_FORMAT_TRANSPARENT:
1384    case PIXEL_FORMAT_TRANSLUCENT:
1385        format = PIXEL_FORMAT_RGBA_8888;
1386        break;
1387    case PIXEL_FORMAT_OPAQUE:
1388#ifdef NO_RGBX_8888
1389        format = PIXEL_FORMAT_RGB_565;
1390#else
1391        format = PIXEL_FORMAT_RGBX_8888;
1392#endif
1393        break;
1394    }
1395
1396#ifdef NO_RGBX_8888
1397    if (format == PIXEL_FORMAT_RGBX_8888)
1398        format = PIXEL_FORMAT_RGBA_8888;
1399#endif
1400
1401    sp<Layer> layer = new Layer(this, display, client);
1402    status_t err = layer->setBuffers(w, h, format, flags);
1403    if (LIKELY(err != NO_ERROR)) {
1404        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1405        layer.clear();
1406    }
1407    return layer;
1408}
1409
1410sp<LayerDim> SurfaceFlinger::createDimSurface(
1411        const sp<Client>& client, DisplayID display,
1412        uint32_t w, uint32_t h, uint32_t flags)
1413{
1414    sp<LayerDim> layer = new LayerDim(this, display, client);
1415    layer->initStates(w, h, flags);
1416    return layer;
1417}
1418
1419status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1420{
1421    /*
1422     * called by the window manager, when a surface should be marked for
1423     * destruction.
1424     *
1425     * The surface is removed from the current and drawing lists, but placed
1426     * in the purgatory queue, so it's not destroyed right-away (we need
1427     * to wait for all client's references to go away first).
1428     */
1429
1430    status_t err = NAME_NOT_FOUND;
1431    Mutex::Autolock _l(mStateLock);
1432    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1433    if (layer != 0) {
1434        err = purgatorizeLayer_l(layer);
1435        if (err == NO_ERROR) {
1436            setTransactionFlags(eTransactionNeeded);
1437        }
1438    }
1439    return err;
1440}
1441
1442status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1443{
1444    // called by ~ISurface() when all references are gone
1445    status_t err = NO_ERROR;
1446    sp<LayerBaseClient> l(layer.promote());
1447    if (l != NULL) {
1448        Mutex::Autolock _l(mStateLock);
1449        err = removeLayer_l(l);
1450        if (err == NAME_NOT_FOUND) {
1451            // The surface wasn't in the current list, which means it was
1452            // removed already, which means it is in the purgatory,
1453            // and need to be removed from there.
1454            ssize_t idx = mLayerPurgatory.remove(l);
1455            LOGE_IF(idx < 0,
1456                    "layer=%p is not in the purgatory list", l.get());
1457        }
1458        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1459                "error removing layer=%p (%s)", l.get(), strerror(-err));
1460    }
1461    return err;
1462}
1463
1464uint32_t SurfaceFlinger::setClientStateLocked(
1465        const sp<Client>& client,
1466        const layer_state_t& s)
1467{
1468    uint32_t flags = 0;
1469    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1470    if (layer != 0) {
1471        const uint32_t what = s.what;
1472        if (what & ePositionChanged) {
1473            if (layer->setPosition(s.x, s.y))
1474                flags |= eTraversalNeeded;
1475        }
1476        if (what & eLayerChanged) {
1477            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1478            if (layer->setLayer(s.z)) {
1479                mCurrentState.layersSortedByZ.removeAt(idx);
1480                mCurrentState.layersSortedByZ.add(layer);
1481                // we need traversal (state changed)
1482                // AND transaction (list changed)
1483                flags |= eTransactionNeeded|eTraversalNeeded;
1484            }
1485        }
1486        if (what & eSizeChanged) {
1487            if (layer->setSize(s.w, s.h)) {
1488                flags |= eTraversalNeeded;
1489                mResizeTransationPending = true;
1490            }
1491        }
1492        if (what & eAlphaChanged) {
1493            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1494                flags |= eTraversalNeeded;
1495        }
1496        if (what & eMatrixChanged) {
1497            if (layer->setMatrix(s.matrix))
1498                flags |= eTraversalNeeded;
1499        }
1500        if (what & eTransparentRegionChanged) {
1501            if (layer->setTransparentRegionHint(s.transparentRegion))
1502                flags |= eTraversalNeeded;
1503        }
1504        if (what & eVisibilityChanged) {
1505            if (layer->setFlags(s.flags, s.mask))
1506                flags |= eTraversalNeeded;
1507        }
1508    }
1509    return flags;
1510}
1511
1512void SurfaceFlinger::screenReleased(int dpy)
1513{
1514    // this may be called by a signal handler, we can't do too much in here
1515    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1516    signalEvent();
1517}
1518
1519void SurfaceFlinger::screenAcquired(int dpy)
1520{
1521    // this may be called by a signal handler, we can't do too much in here
1522    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1523    signalEvent();
1524}
1525
1526status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1527{
1528    const size_t SIZE = 4096;
1529    char buffer[SIZE];
1530    String8 result;
1531
1532    if (!PermissionCache::checkCallingPermission(sDump)) {
1533        snprintf(buffer, SIZE, "Permission Denial: "
1534                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1535                IPCThreadState::self()->getCallingPid(),
1536                IPCThreadState::self()->getCallingUid());
1537        result.append(buffer);
1538    } else {
1539
1540        // figure out if we're stuck somewhere
1541        const nsecs_t now = systemTime();
1542        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1543        const nsecs_t inTransaction(mDebugInTransaction);
1544        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1545        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1546
1547        // Try to get the main lock, but don't insist if we can't
1548        // (this would indicate SF is stuck, but we want to be able to
1549        // print something in dumpsys).
1550        int retry = 3;
1551        while (mStateLock.tryLock()<0 && --retry>=0) {
1552            usleep(1000000);
1553        }
1554        const bool locked(retry >= 0);
1555        if (!locked) {
1556            snprintf(buffer, SIZE,
1557                    "SurfaceFlinger appears to be unresponsive, "
1558                    "dumping anyways (no locks held)\n");
1559            result.append(buffer);
1560        }
1561
1562        /*
1563         * Dump the visible layer list
1564         */
1565        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1566        const size_t count = currentLayers.size();
1567        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1568        result.append(buffer);
1569        for (size_t i=0 ; i<count ; i++) {
1570            const sp<LayerBase>& layer(currentLayers[i]);
1571            layer->dump(result, buffer, SIZE);
1572            const Layer::State& s(layer->drawingState());
1573            s.transparentRegion.dump(result, "transparentRegion");
1574            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1575            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1576        }
1577
1578        /*
1579         * Dump the layers in the purgatory
1580         */
1581
1582        const size_t purgatorySize =  mLayerPurgatory.size();
1583        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1584        result.append(buffer);
1585        for (size_t i=0 ; i<purgatorySize ; i++) {
1586            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1587            layer->shortDump(result, buffer, SIZE);
1588        }
1589
1590        /*
1591         * Dump SurfaceFlinger global state
1592         */
1593
1594        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1595        result.append(buffer);
1596
1597        const GLExtensions& extensions(GLExtensions::getInstance());
1598        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1599                extensions.getVendor(),
1600                extensions.getRenderer(),
1601                extensions.getVersion());
1602        result.append(buffer);
1603        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1604        result.append(buffer);
1605
1606        mWormholeRegion.dump(result, "WormholeRegion");
1607        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1608        snprintf(buffer, SIZE,
1609                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1610                mFreezeDisplay?"yes":"no", mFreezeCount,
1611                mCurrentState.orientation, hw.canDraw());
1612        result.append(buffer);
1613        snprintf(buffer, SIZE,
1614                "  last eglSwapBuffers() time: %f us\n"
1615                "  last transaction time     : %f us\n",
1616                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1617        result.append(buffer);
1618
1619        if (inSwapBuffersDuration || !locked) {
1620            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1621                    inSwapBuffersDuration/1000.0);
1622            result.append(buffer);
1623        }
1624
1625        if (inTransactionDuration || !locked) {
1626            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1627                    inTransactionDuration/1000.0);
1628            result.append(buffer);
1629        }
1630
1631        /*
1632         * Dump HWComposer state
1633         */
1634        HWComposer& hwc(hw.getHwComposer());
1635        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1636                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1637                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1638        result.append(buffer);
1639        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1640
1641        /*
1642         * Dump gralloc state
1643         */
1644        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1645        alloc.dump(result);
1646        hw.dump(result);
1647
1648        if (locked) {
1649            mStateLock.unlock();
1650        }
1651    }
1652    write(fd, result.string(), result.size());
1653    return NO_ERROR;
1654}
1655
1656status_t SurfaceFlinger::onTransact(
1657    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1658{
1659    switch (code) {
1660        case CREATE_CONNECTION:
1661        case SET_TRANSACTION_STATE:
1662        case SET_ORIENTATION:
1663        case FREEZE_DISPLAY:
1664        case UNFREEZE_DISPLAY:
1665        case BOOT_FINISHED:
1666        case TURN_ELECTRON_BEAM_OFF:
1667        case TURN_ELECTRON_BEAM_ON:
1668        {
1669            // codes that require permission check
1670            IPCThreadState* ipc = IPCThreadState::self();
1671            const int pid = ipc->getCallingPid();
1672            const int uid = ipc->getCallingUid();
1673            if ((uid != AID_GRAPHICS) &&
1674                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1675                LOGE("Permission Denial: "
1676                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1677                return PERMISSION_DENIED;
1678            }
1679            break;
1680        }
1681        case CAPTURE_SCREEN:
1682        {
1683            // codes that require permission check
1684            IPCThreadState* ipc = IPCThreadState::self();
1685            const int pid = ipc->getCallingPid();
1686            const int uid = ipc->getCallingUid();
1687            if ((uid != AID_GRAPHICS) &&
1688                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1689                LOGE("Permission Denial: "
1690                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1691                return PERMISSION_DENIED;
1692            }
1693            break;
1694        }
1695    }
1696
1697    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1698    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1699        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1700        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1701            IPCThreadState* ipc = IPCThreadState::self();
1702            const int pid = ipc->getCallingPid();
1703            const int uid = ipc->getCallingUid();
1704            LOGE("Permission Denial: "
1705                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1706            return PERMISSION_DENIED;
1707        }
1708        int n;
1709        switch (code) {
1710            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1711            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1712                return NO_ERROR;
1713            case 1002:  // SHOW_UPDATES
1714                n = data.readInt32();
1715                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1716                invalidateHwcGeometry();
1717                repaintEverything();
1718                return NO_ERROR;
1719            case 1003:  // SHOW_BACKGROUND
1720                n = data.readInt32();
1721                mDebugBackground = n ? 1 : 0;
1722                return NO_ERROR;
1723            case 1004:{ // repaint everything
1724                repaintEverything();
1725                return NO_ERROR;
1726            }
1727            case 1005:{ // force transaction
1728                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1729                return NO_ERROR;
1730            }
1731            case 1006:{ // enable/disable GraphicLog
1732                int enabled = data.readInt32();
1733                GraphicLog::getInstance().setEnabled(enabled);
1734                return NO_ERROR;
1735            }
1736            case 1007: // set mFreezeCount
1737                mFreezeCount = data.readInt32();
1738                mFreezeDisplayTime = 0;
1739                return NO_ERROR;
1740            case 1008:  // toggle use of hw composer
1741                n = data.readInt32();
1742                mDebugDisableHWC = n ? 1 : 0;
1743                invalidateHwcGeometry();
1744                repaintEverything();
1745                return NO_ERROR;
1746            case 1009:  // toggle use of transform hint
1747                n = data.readInt32();
1748                mDebugDisableTransformHint = n ? 1 : 0;
1749                invalidateHwcGeometry();
1750                repaintEverything();
1751                return NO_ERROR;
1752            case 1010:  // interrogate.
1753                reply->writeInt32(0);
1754                reply->writeInt32(0);
1755                reply->writeInt32(mDebugRegion);
1756                reply->writeInt32(mDebugBackground);
1757                return NO_ERROR;
1758            case 1013: {
1759                Mutex::Autolock _l(mStateLock);
1760                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1761                reply->writeInt32(hw.getPageFlipCount());
1762            }
1763            return NO_ERROR;
1764        }
1765    }
1766    return err;
1767}
1768
1769void SurfaceFlinger::repaintEverything() {
1770    Mutex::Autolock _l(mStateLock);
1771    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1772    mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1773    signalEvent();
1774}
1775
1776// ---------------------------------------------------------------------------
1777
1778status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1779        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1780{
1781    if (!GLExtensions::getInstance().haveFramebufferObject())
1782        return INVALID_OPERATION;
1783
1784    // get screen geometry
1785    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1786    const uint32_t hw_w = hw.getWidth();
1787    const uint32_t hw_h = hw.getHeight();
1788    GLfloat u = 1;
1789    GLfloat v = 1;
1790
1791    // make sure to clear all GL error flags
1792    while ( glGetError() != GL_NO_ERROR ) ;
1793
1794    // create a FBO
1795    GLuint name, tname;
1796    glGenTextures(1, &tname);
1797    glBindTexture(GL_TEXTURE_2D, tname);
1798    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1799            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1800    if (glGetError() != GL_NO_ERROR) {
1801        while ( glGetError() != GL_NO_ERROR ) ;
1802        GLint tw = (2 << (31 - clz(hw_w)));
1803        GLint th = (2 << (31 - clz(hw_h)));
1804        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1805                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1806        u = GLfloat(hw_w) / tw;
1807        v = GLfloat(hw_h) / th;
1808    }
1809    glGenFramebuffersOES(1, &name);
1810    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1811    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1812            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1813
1814    // redraw the screen entirely...
1815    glDisable(GL_TEXTURE_EXTERNAL_OES);
1816    glDisable(GL_TEXTURE_2D);
1817    glClearColor(0,0,0,1);
1818    glClear(GL_COLOR_BUFFER_BIT);
1819    glMatrixMode(GL_MODELVIEW);
1820    glLoadIdentity();
1821    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1822    const size_t count = layers.size();
1823    for (size_t i=0 ; i<count ; ++i) {
1824        const sp<LayerBase>& layer(layers[i]);
1825        layer->drawForSreenShot();
1826    }
1827
1828    // back to main framebuffer
1829    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1830    glDisable(GL_SCISSOR_TEST);
1831    glDeleteFramebuffersOES(1, &name);
1832
1833    *textureName = tname;
1834    *uOut = u;
1835    *vOut = v;
1836    return NO_ERROR;
1837}
1838
1839// ---------------------------------------------------------------------------
1840
1841status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1842{
1843    status_t result = PERMISSION_DENIED;
1844
1845    if (!GLExtensions::getInstance().haveFramebufferObject())
1846        return INVALID_OPERATION;
1847
1848    // get screen geometry
1849    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1850    const uint32_t hw_w = hw.getWidth();
1851    const uint32_t hw_h = hw.getHeight();
1852    const Region screenBounds(hw.getBounds());
1853
1854    GLfloat u, v;
1855    GLuint tname;
1856    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1857    if (result != NO_ERROR) {
1858        return result;
1859    }
1860
1861    GLfloat vtx[8];
1862    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1863    glBindTexture(GL_TEXTURE_2D, tname);
1864    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1865    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1866    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1867    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1868    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1869    glVertexPointer(2, GL_FLOAT, 0, vtx);
1870
1871    /*
1872     * Texture coordinate mapping
1873     *
1874     *                 u
1875     *    1 +----------+---+
1876     *      |     |    |   |  image is inverted
1877     *      |     V    |   |  w.r.t. the texture
1878     *  1-v +----------+   |  coordinates
1879     *      |              |
1880     *      |              |
1881     *      |              |
1882     *    0 +--------------+
1883     *      0              1
1884     *
1885     */
1886
1887    class s_curve_interpolator {
1888        const float nbFrames, s, v;
1889    public:
1890        s_curve_interpolator(int nbFrames, float s)
1891        : nbFrames(1.0f / (nbFrames-1)), s(s),
1892          v(1.0f + expf(-s + 0.5f*s)) {
1893        }
1894        float operator()(int f) {
1895            const float x = f * nbFrames;
1896            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1897        }
1898    };
1899
1900    class v_stretch {
1901        const GLfloat hw_w, hw_h;
1902    public:
1903        v_stretch(uint32_t hw_w, uint32_t hw_h)
1904        : hw_w(hw_w), hw_h(hw_h) {
1905        }
1906        void operator()(GLfloat* vtx, float v) {
1907            const GLfloat w = hw_w + (hw_w * v);
1908            const GLfloat h = hw_h - (hw_h * v);
1909            const GLfloat x = (hw_w - w) * 0.5f;
1910            const GLfloat y = (hw_h - h) * 0.5f;
1911            vtx[0] = x;         vtx[1] = y;
1912            vtx[2] = x;         vtx[3] = y + h;
1913            vtx[4] = x + w;     vtx[5] = y + h;
1914            vtx[6] = x + w;     vtx[7] = y;
1915        }
1916    };
1917
1918    class h_stretch {
1919        const GLfloat hw_w, hw_h;
1920    public:
1921        h_stretch(uint32_t hw_w, uint32_t hw_h)
1922        : hw_w(hw_w), hw_h(hw_h) {
1923        }
1924        void operator()(GLfloat* vtx, float v) {
1925            const GLfloat w = hw_w - (hw_w * v);
1926            const GLfloat h = 1.0f;
1927            const GLfloat x = (hw_w - w) * 0.5f;
1928            const GLfloat y = (hw_h - h) * 0.5f;
1929            vtx[0] = x;         vtx[1] = y;
1930            vtx[2] = x;         vtx[3] = y + h;
1931            vtx[4] = x + w;     vtx[5] = y + h;
1932            vtx[6] = x + w;     vtx[7] = y;
1933        }
1934    };
1935
1936    // the full animation is 24 frames
1937    char value[PROPERTY_VALUE_MAX];
1938    property_get("debug.sf.electron_frames", value, "24");
1939    int nbFrames = (atoi(value) + 1) >> 1;
1940    if (nbFrames <= 0) // just in case
1941        nbFrames = 24;
1942
1943    s_curve_interpolator itr(nbFrames, 7.5f);
1944    s_curve_interpolator itg(nbFrames, 8.0f);
1945    s_curve_interpolator itb(nbFrames, 8.5f);
1946
1947    v_stretch vverts(hw_w, hw_h);
1948
1949    glMatrixMode(GL_TEXTURE);
1950    glLoadIdentity();
1951    glMatrixMode(GL_MODELVIEW);
1952    glLoadIdentity();
1953
1954    glEnable(GL_BLEND);
1955    glBlendFunc(GL_ONE, GL_ONE);
1956    for (int i=0 ; i<nbFrames ; i++) {
1957        float x, y, w, h;
1958        const float vr = itr(i);
1959        const float vg = itg(i);
1960        const float vb = itb(i);
1961
1962        // clear screen
1963        glColorMask(1,1,1,1);
1964        glClear(GL_COLOR_BUFFER_BIT);
1965        glEnable(GL_TEXTURE_2D);
1966
1967        // draw the red plane
1968        vverts(vtx, vr);
1969        glColorMask(1,0,0,1);
1970        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1971
1972        // draw the green plane
1973        vverts(vtx, vg);
1974        glColorMask(0,1,0,1);
1975        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1976
1977        // draw the blue plane
1978        vverts(vtx, vb);
1979        glColorMask(0,0,1,1);
1980        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1981
1982        // draw the white highlight (we use the last vertices)
1983        glDisable(GL_TEXTURE_2D);
1984        glColorMask(1,1,1,1);
1985        glColor4f(vg, vg, vg, 1);
1986        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1987        hw.flip(screenBounds);
1988    }
1989
1990    h_stretch hverts(hw_w, hw_h);
1991    glDisable(GL_BLEND);
1992    glDisable(GL_TEXTURE_2D);
1993    glColorMask(1,1,1,1);
1994    for (int i=0 ; i<nbFrames ; i++) {
1995        const float v = itg(i);
1996        hverts(vtx, v);
1997        glClear(GL_COLOR_BUFFER_BIT);
1998        glColor4f(1-v, 1-v, 1-v, 1);
1999        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2000        hw.flip(screenBounds);
2001    }
2002
2003    glColorMask(1,1,1,1);
2004    glEnable(GL_SCISSOR_TEST);
2005    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2006    glDeleteTextures(1, &tname);
2007    glDisable(GL_TEXTURE_2D);
2008    glDisable(GL_BLEND);
2009    return NO_ERROR;
2010}
2011
2012status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2013{
2014    status_t result = PERMISSION_DENIED;
2015
2016    if (!GLExtensions::getInstance().haveFramebufferObject())
2017        return INVALID_OPERATION;
2018
2019
2020    // get screen geometry
2021    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2022    const uint32_t hw_w = hw.getWidth();
2023    const uint32_t hw_h = hw.getHeight();
2024    const Region screenBounds(hw.bounds());
2025
2026    GLfloat u, v;
2027    GLuint tname;
2028    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2029    if (result != NO_ERROR) {
2030        return result;
2031    }
2032
2033    // back to main framebuffer
2034    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2035    glDisable(GL_SCISSOR_TEST);
2036
2037    GLfloat vtx[8];
2038    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2039    glBindTexture(GL_TEXTURE_2D, tname);
2040    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2041    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2042    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2043    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2044    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2045    glVertexPointer(2, GL_FLOAT, 0, vtx);
2046
2047    class s_curve_interpolator {
2048        const float nbFrames, s, v;
2049    public:
2050        s_curve_interpolator(int nbFrames, float s)
2051        : nbFrames(1.0f / (nbFrames-1)), s(s),
2052          v(1.0f + expf(-s + 0.5f*s)) {
2053        }
2054        float operator()(int f) {
2055            const float x = f * nbFrames;
2056            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2057        }
2058    };
2059
2060    class v_stretch {
2061        const GLfloat hw_w, hw_h;
2062    public:
2063        v_stretch(uint32_t hw_w, uint32_t hw_h)
2064        : hw_w(hw_w), hw_h(hw_h) {
2065        }
2066        void operator()(GLfloat* vtx, float v) {
2067            const GLfloat w = hw_w + (hw_w * v);
2068            const GLfloat h = hw_h - (hw_h * v);
2069            const GLfloat x = (hw_w - w) * 0.5f;
2070            const GLfloat y = (hw_h - h) * 0.5f;
2071            vtx[0] = x;         vtx[1] = y;
2072            vtx[2] = x;         vtx[3] = y + h;
2073            vtx[4] = x + w;     vtx[5] = y + h;
2074            vtx[6] = x + w;     vtx[7] = y;
2075        }
2076    };
2077
2078    class h_stretch {
2079        const GLfloat hw_w, hw_h;
2080    public:
2081        h_stretch(uint32_t hw_w, uint32_t hw_h)
2082        : hw_w(hw_w), hw_h(hw_h) {
2083        }
2084        void operator()(GLfloat* vtx, float v) {
2085            const GLfloat w = hw_w - (hw_w * v);
2086            const GLfloat h = 1.0f;
2087            const GLfloat x = (hw_w - w) * 0.5f;
2088            const GLfloat y = (hw_h - h) * 0.5f;
2089            vtx[0] = x;         vtx[1] = y;
2090            vtx[2] = x;         vtx[3] = y + h;
2091            vtx[4] = x + w;     vtx[5] = y + h;
2092            vtx[6] = x + w;     vtx[7] = y;
2093        }
2094    };
2095
2096    // the full animation is 12 frames
2097    int nbFrames = 8;
2098    s_curve_interpolator itr(nbFrames, 7.5f);
2099    s_curve_interpolator itg(nbFrames, 8.0f);
2100    s_curve_interpolator itb(nbFrames, 8.5f);
2101
2102    h_stretch hverts(hw_w, hw_h);
2103    glDisable(GL_BLEND);
2104    glDisable(GL_TEXTURE_2D);
2105    glColorMask(1,1,1,1);
2106    for (int i=nbFrames-1 ; i>=0 ; i--) {
2107        const float v = itg(i);
2108        hverts(vtx, v);
2109        glClear(GL_COLOR_BUFFER_BIT);
2110        glColor4f(1-v, 1-v, 1-v, 1);
2111        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2112        hw.flip(screenBounds);
2113    }
2114
2115    nbFrames = 4;
2116    v_stretch vverts(hw_w, hw_h);
2117    glEnable(GL_BLEND);
2118    glBlendFunc(GL_ONE, GL_ONE);
2119    for (int i=nbFrames-1 ; i>=0 ; i--) {
2120        float x, y, w, h;
2121        const float vr = itr(i);
2122        const float vg = itg(i);
2123        const float vb = itb(i);
2124
2125        // clear screen
2126        glColorMask(1,1,1,1);
2127        glClear(GL_COLOR_BUFFER_BIT);
2128        glEnable(GL_TEXTURE_2D);
2129
2130        // draw the red plane
2131        vverts(vtx, vr);
2132        glColorMask(1,0,0,1);
2133        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2134
2135        // draw the green plane
2136        vverts(vtx, vg);
2137        glColorMask(0,1,0,1);
2138        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2139
2140        // draw the blue plane
2141        vverts(vtx, vb);
2142        glColorMask(0,0,1,1);
2143        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2144
2145        hw.flip(screenBounds);
2146    }
2147
2148    glColorMask(1,1,1,1);
2149    glEnable(GL_SCISSOR_TEST);
2150    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2151    glDeleteTextures(1, &tname);
2152    glDisable(GL_TEXTURE_2D);
2153    glDisable(GL_BLEND);
2154
2155    return NO_ERROR;
2156}
2157
2158// ---------------------------------------------------------------------------
2159
2160status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2161{
2162    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2163    if (!hw.canDraw()) {
2164        // we're already off
2165        return NO_ERROR;
2166    }
2167
2168    // turn off hwc while we're doing the animation
2169    hw.getHwComposer().disable();
2170    // and make sure to turn it back on (if needed) next time we compose
2171    invalidateHwcGeometry();
2172
2173    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2174        electronBeamOffAnimationImplLocked();
2175    }
2176
2177    // always clear the whole screen at the end of the animation
2178    glClearColor(0,0,0,1);
2179    glDisable(GL_SCISSOR_TEST);
2180    glClear(GL_COLOR_BUFFER_BIT);
2181    glEnable(GL_SCISSOR_TEST);
2182    hw.flip( Region(hw.bounds()) );
2183
2184    return NO_ERROR;
2185}
2186
2187status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2188{
2189    class MessageTurnElectronBeamOff : public MessageBase {
2190        SurfaceFlinger* flinger;
2191        int32_t mode;
2192        status_t result;
2193    public:
2194        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2195            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2196        }
2197        status_t getResult() const {
2198            return result;
2199        }
2200        virtual bool handler() {
2201            Mutex::Autolock _l(flinger->mStateLock);
2202            result = flinger->turnElectronBeamOffImplLocked(mode);
2203            return true;
2204        }
2205    };
2206
2207    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2208    status_t res = postMessageSync(msg);
2209    if (res == NO_ERROR) {
2210        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2211
2212        // work-around: when the power-manager calls us we activate the
2213        // animation. eventually, the "on" animation will be called
2214        // by the power-manager itself
2215        mElectronBeamAnimationMode = mode;
2216    }
2217    return res;
2218}
2219
2220// ---------------------------------------------------------------------------
2221
2222status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2223{
2224    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2225    if (hw.canDraw()) {
2226        // we're already on
2227        return NO_ERROR;
2228    }
2229    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2230        electronBeamOnAnimationImplLocked();
2231    }
2232
2233    // make sure to redraw the whole screen when the animation is done
2234    mDirtyRegion.set(hw.bounds());
2235    signalEvent();
2236
2237    return NO_ERROR;
2238}
2239
2240status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2241{
2242    class MessageTurnElectronBeamOn : public MessageBase {
2243        SurfaceFlinger* flinger;
2244        int32_t mode;
2245        status_t result;
2246    public:
2247        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2248            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2249        }
2250        status_t getResult() const {
2251            return result;
2252        }
2253        virtual bool handler() {
2254            Mutex::Autolock _l(flinger->mStateLock);
2255            result = flinger->turnElectronBeamOnImplLocked(mode);
2256            return true;
2257        }
2258    };
2259
2260    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2261    return NO_ERROR;
2262}
2263
2264// ---------------------------------------------------------------------------
2265
2266status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2267        sp<IMemoryHeap>* heap,
2268        uint32_t* w, uint32_t* h, PixelFormat* f,
2269        uint32_t sw, uint32_t sh,
2270        uint32_t minLayerZ, uint32_t maxLayerZ)
2271{
2272    status_t result = PERMISSION_DENIED;
2273
2274    // only one display supported for now
2275    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2276        return BAD_VALUE;
2277
2278    if (!GLExtensions::getInstance().haveFramebufferObject())
2279        return INVALID_OPERATION;
2280
2281    // get screen geometry
2282    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2283    const uint32_t hw_w = hw.getWidth();
2284    const uint32_t hw_h = hw.getHeight();
2285
2286    if ((sw > hw_w) || (sh > hw_h))
2287        return BAD_VALUE;
2288
2289    sw = (!sw) ? hw_w : sw;
2290    sh = (!sh) ? hw_h : sh;
2291    const size_t size = sw * sh * 4;
2292
2293    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2294    //        sw, sh, minLayerZ, maxLayerZ);
2295
2296    // make sure to clear all GL error flags
2297    while ( glGetError() != GL_NO_ERROR ) ;
2298
2299    // create a FBO
2300    GLuint name, tname;
2301    glGenRenderbuffersOES(1, &tname);
2302    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2303    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2304    glGenFramebuffersOES(1, &name);
2305    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2306    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2307            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2308
2309    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2310
2311    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2312
2313        // invert everything, b/c glReadPixel() below will invert the FB
2314        glViewport(0, 0, sw, sh);
2315        glScissor(0, 0, sw, sh);
2316        glEnable(GL_SCISSOR_TEST);
2317        glMatrixMode(GL_PROJECTION);
2318        glPushMatrix();
2319        glLoadIdentity();
2320        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2321        glMatrixMode(GL_MODELVIEW);
2322
2323        // redraw the screen entirely...
2324        glClearColor(0,0,0,1);
2325        glClear(GL_COLOR_BUFFER_BIT);
2326
2327        const LayerVector& layers(mDrawingState.layersSortedByZ);
2328        const size_t count = layers.size();
2329        for (size_t i=0 ; i<count ; ++i) {
2330            const sp<LayerBase>& layer(layers[i]);
2331            const uint32_t flags = layer->drawingState().flags;
2332            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2333                const uint32_t z = layer->drawingState().z;
2334                if (z >= minLayerZ && z <= maxLayerZ) {
2335                    layer->drawForSreenShot();
2336                }
2337            }
2338        }
2339
2340        // XXX: this is needed on tegra
2341        glEnable(GL_SCISSOR_TEST);
2342        glScissor(0, 0, sw, sh);
2343
2344        // check for errors and return screen capture
2345        if (glGetError() != GL_NO_ERROR) {
2346            // error while rendering
2347            result = INVALID_OPERATION;
2348        } else {
2349            // allocate shared memory large enough to hold the
2350            // screen capture
2351            sp<MemoryHeapBase> base(
2352                    new MemoryHeapBase(size, 0, "screen-capture") );
2353            void* const ptr = base->getBase();
2354            if (ptr) {
2355                // capture the screen with glReadPixels()
2356                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2357                if (glGetError() == GL_NO_ERROR) {
2358                    *heap = base;
2359                    *w = sw;
2360                    *h = sh;
2361                    *f = PIXEL_FORMAT_RGBA_8888;
2362                    result = NO_ERROR;
2363                }
2364            } else {
2365                result = NO_MEMORY;
2366            }
2367        }
2368        glEnable(GL_SCISSOR_TEST);
2369        glViewport(0, 0, hw_w, hw_h);
2370        glMatrixMode(GL_PROJECTION);
2371        glPopMatrix();
2372        glMatrixMode(GL_MODELVIEW);
2373    } else {
2374        result = BAD_VALUE;
2375    }
2376
2377    // release FBO resources
2378    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2379    glDeleteRenderbuffersOES(1, &tname);
2380    glDeleteFramebuffersOES(1, &name);
2381
2382    hw.compositionComplete();
2383
2384    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2385
2386    return result;
2387}
2388
2389
2390status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2391        sp<IMemoryHeap>* heap,
2392        uint32_t* width, uint32_t* height, PixelFormat* format,
2393        uint32_t sw, uint32_t sh,
2394        uint32_t minLayerZ, uint32_t maxLayerZ)
2395{
2396    // only one display supported for now
2397    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2398        return BAD_VALUE;
2399
2400    if (!GLExtensions::getInstance().haveFramebufferObject())
2401        return INVALID_OPERATION;
2402
2403    class MessageCaptureScreen : public MessageBase {
2404        SurfaceFlinger* flinger;
2405        DisplayID dpy;
2406        sp<IMemoryHeap>* heap;
2407        uint32_t* w;
2408        uint32_t* h;
2409        PixelFormat* f;
2410        uint32_t sw;
2411        uint32_t sh;
2412        uint32_t minLayerZ;
2413        uint32_t maxLayerZ;
2414        status_t result;
2415    public:
2416        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2417                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2418                uint32_t sw, uint32_t sh,
2419                uint32_t minLayerZ, uint32_t maxLayerZ)
2420            : flinger(flinger), dpy(dpy),
2421              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2422              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2423              result(PERMISSION_DENIED)
2424        {
2425        }
2426        status_t getResult() const {
2427            return result;
2428        }
2429        virtual bool handler() {
2430            Mutex::Autolock _l(flinger->mStateLock);
2431
2432            // if we have secure windows, never allow the screen capture
2433            if (flinger->mSecureFrameBuffer)
2434                return true;
2435
2436            result = flinger->captureScreenImplLocked(dpy,
2437                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2438
2439            return true;
2440        }
2441    };
2442
2443    sp<MessageBase> msg = new MessageCaptureScreen(this,
2444            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2445    status_t res = postMessageSync(msg);
2446    if (res == NO_ERROR) {
2447        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2448    }
2449    return res;
2450}
2451
2452// ---------------------------------------------------------------------------
2453
2454sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2455{
2456    sp<Layer> result;
2457    Mutex::Autolock _l(mStateLock);
2458    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2459    return result;
2460}
2461
2462// ---------------------------------------------------------------------------
2463
2464Client::Client(const sp<SurfaceFlinger>& flinger)
2465    : mFlinger(flinger), mNameGenerator(1)
2466{
2467}
2468
2469Client::~Client()
2470{
2471    const size_t count = mLayers.size();
2472    for (size_t i=0 ; i<count ; i++) {
2473        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2474        if (layer != 0) {
2475            mFlinger->removeLayer(layer);
2476        }
2477    }
2478}
2479
2480status_t Client::initCheck() const {
2481    return NO_ERROR;
2482}
2483
2484size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2485{
2486    Mutex::Autolock _l(mLock);
2487    size_t name = mNameGenerator++;
2488    mLayers.add(name, layer);
2489    return name;
2490}
2491
2492void Client::detachLayer(const LayerBaseClient* layer)
2493{
2494    Mutex::Autolock _l(mLock);
2495    // we do a linear search here, because this doesn't happen often
2496    const size_t count = mLayers.size();
2497    for (size_t i=0 ; i<count ; i++) {
2498        if (mLayers.valueAt(i) == layer) {
2499            mLayers.removeItemsAt(i, 1);
2500            break;
2501        }
2502    }
2503}
2504sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2505{
2506    Mutex::Autolock _l(mLock);
2507    sp<LayerBaseClient> lbc;
2508    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2509    if (layer != 0) {
2510        lbc = layer.promote();
2511        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2512    }
2513    return lbc;
2514}
2515
2516
2517status_t Client::onTransact(
2518    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2519{
2520    // these must be checked
2521     IPCThreadState* ipc = IPCThreadState::self();
2522     const int pid = ipc->getCallingPid();
2523     const int uid = ipc->getCallingUid();
2524     const int self_pid = getpid();
2525     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2526         // we're called from a different process, do the real check
2527         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2528         {
2529             LOGE("Permission Denial: "
2530                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2531             return PERMISSION_DENIED;
2532         }
2533     }
2534     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2535}
2536
2537
2538sp<ISurface> Client::createSurface(
2539        ISurfaceComposerClient::surface_data_t* params,
2540        const String8& name,
2541        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2542        uint32_t flags)
2543{
2544    /*
2545     * createSurface must be called from the GL thread so that it can
2546     * have access to the GL context.
2547     */
2548
2549    class MessageCreateSurface : public MessageBase {
2550        sp<ISurface> result;
2551        SurfaceFlinger* flinger;
2552        ISurfaceComposerClient::surface_data_t* params;
2553        Client* client;
2554        const String8& name;
2555        DisplayID display;
2556        uint32_t w, h;
2557        PixelFormat format;
2558        uint32_t flags;
2559    public:
2560        MessageCreateSurface(SurfaceFlinger* flinger,
2561                ISurfaceComposerClient::surface_data_t* params,
2562                const String8& name, Client* client,
2563                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2564                uint32_t flags)
2565            : flinger(flinger), params(params), client(client), name(name),
2566              display(display), w(w), h(h), format(format), flags(flags)
2567        {
2568        }
2569        sp<ISurface> getResult() const { return result; }
2570        virtual bool handler() {
2571            result = flinger->createSurface(params, name, client,
2572                    display, w, h, format, flags);
2573            return true;
2574        }
2575    };
2576
2577    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2578            params, name, this, display, w, h, format, flags);
2579    mFlinger->postMessageSync(msg);
2580    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2581}
2582status_t Client::destroySurface(SurfaceID sid) {
2583    return mFlinger->removeSurface(this, sid);
2584}
2585
2586// ---------------------------------------------------------------------------
2587
2588GraphicBufferAlloc::GraphicBufferAlloc() {}
2589
2590GraphicBufferAlloc::~GraphicBufferAlloc() {}
2591
2592sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2593        PixelFormat format, uint32_t usage, status_t* error) {
2594    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2595    status_t err = graphicBuffer->initCheck();
2596    *error = err;
2597    if (err != 0 || graphicBuffer->handle == 0) {
2598        if (err == NO_MEMORY) {
2599            GraphicBuffer::dumpAllocationsToSystemLog();
2600        }
2601        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2602             "failed (%s), handle=%p",
2603                w, h, strerror(-err), graphicBuffer->handle);
2604        return 0;
2605    }
2606    return graphicBuffer;
2607}
2608
2609// ---------------------------------------------------------------------------
2610
2611GraphicPlane::GraphicPlane()
2612    : mHw(0)
2613{
2614}
2615
2616GraphicPlane::~GraphicPlane() {
2617    delete mHw;
2618}
2619
2620bool GraphicPlane::initialized() const {
2621    return mHw ? true : false;
2622}
2623
2624int GraphicPlane::getWidth() const {
2625    return mWidth;
2626}
2627
2628int GraphicPlane::getHeight() const {
2629    return mHeight;
2630}
2631
2632void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2633{
2634    mHw = hw;
2635
2636    // initialize the display orientation transform.
2637    // it's a constant that should come from the display driver.
2638    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2639    char property[PROPERTY_VALUE_MAX];
2640    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2641        //displayOrientation
2642        switch (atoi(property)) {
2643        case 90:
2644            displayOrientation = ISurfaceComposer::eOrientation90;
2645            break;
2646        case 270:
2647            displayOrientation = ISurfaceComposer::eOrientation270;
2648            break;
2649        }
2650    }
2651
2652    const float w = hw->getWidth();
2653    const float h = hw->getHeight();
2654    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2655            &mDisplayTransform);
2656    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2657        mDisplayWidth = h;
2658        mDisplayHeight = w;
2659    } else {
2660        mDisplayWidth = w;
2661        mDisplayHeight = h;
2662    }
2663
2664    setOrientation(ISurfaceComposer::eOrientationDefault);
2665}
2666
2667status_t GraphicPlane::orientationToTransfrom(
2668        int orientation, int w, int h, Transform* tr)
2669{
2670    uint32_t flags = 0;
2671    switch (orientation) {
2672    case ISurfaceComposer::eOrientationDefault:
2673        flags = Transform::ROT_0;
2674        break;
2675    case ISurfaceComposer::eOrientation90:
2676        flags = Transform::ROT_90;
2677        break;
2678    case ISurfaceComposer::eOrientation180:
2679        flags = Transform::ROT_180;
2680        break;
2681    case ISurfaceComposer::eOrientation270:
2682        flags = Transform::ROT_270;
2683        break;
2684    default:
2685        return BAD_VALUE;
2686    }
2687    tr->set(flags, w, h);
2688    return NO_ERROR;
2689}
2690
2691status_t GraphicPlane::setOrientation(int orientation)
2692{
2693    // If the rotation can be handled in hardware, this is where
2694    // the magic should happen.
2695
2696    const DisplayHardware& hw(displayHardware());
2697    const float w = mDisplayWidth;
2698    const float h = mDisplayHeight;
2699    mWidth = int(w);
2700    mHeight = int(h);
2701
2702    Transform orientationTransform;
2703    GraphicPlane::orientationToTransfrom(orientation, w, h,
2704            &orientationTransform);
2705    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2706        mWidth = int(h);
2707        mHeight = int(w);
2708    }
2709
2710    mOrientation = orientation;
2711    mGlobalTransform = mDisplayTransform * orientationTransform;
2712    return NO_ERROR;
2713}
2714
2715const DisplayHardware& GraphicPlane::displayHardware() const {
2716    return *mHw;
2717}
2718
2719DisplayHardware& GraphicPlane::editDisplayHardware() {
2720    return *mHw;
2721}
2722
2723const Transform& GraphicPlane::transform() const {
2724    return mGlobalTransform;
2725}
2726
2727EGLDisplay GraphicPlane::getEGLDisplay() const {
2728    return mHw->getEGLDisplay();
2729}
2730
2731// ---------------------------------------------------------------------------
2732
2733}; // namespace android
2734