SurfaceFlinger.cpp revision b8d69a55f1c187a35ac41e69de63251f5501b6f4 
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() && !isFrozen())) {
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    if (!mSwapRegion.isEmpty()) {
482        const DisplayHardware& hw(graphicPlane(0).displayHardware());
483        const nsecs_t now = systemTime();
484        mDebugInSwapBuffers = now;
485        hw.flip(mSwapRegion);
486        mLastSwapBufferTime = systemTime() - now;
487        mDebugInSwapBuffers = 0;
488        mSwapRegion.clear();
489    }
490}
491
492void SurfaceFlinger::handleConsoleEvents()
493{
494    // something to do with the console
495    const DisplayHardware& hw = graphicPlane(0).displayHardware();
496
497    int what = android_atomic_and(0, &mConsoleSignals);
498    if (what & eConsoleAcquired) {
499        hw.acquireScreen();
500        // this is a temporary work-around, eventually this should be called
501        // by the power-manager
502        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
503    }
504
505    if (what & eConsoleReleased) {
506        if (hw.isScreenAcquired()) {
507            hw.releaseScreen();
508        }
509    }
510
511    mDirtyRegion.set(hw.bounds());
512}
513
514void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
515{
516    Mutex::Autolock _l(mStateLock);
517    const nsecs_t now = systemTime();
518    mDebugInTransaction = now;
519
520    // Here we're guaranteed that some transaction flags are set
521    // so we can call handleTransactionLocked() unconditionally.
522    // We call getTransactionFlags(), which will also clear the flags,
523    // with mStateLock held to guarantee that mCurrentState won't change
524    // until the transaction is committed.
525
526    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
527    transactionFlags = getTransactionFlags(mask);
528    handleTransactionLocked(transactionFlags);
529
530    mLastTransactionTime = systemTime() - now;
531    mDebugInTransaction = 0;
532    invalidateHwcGeometry();
533    // here the transaction has been committed
534}
535
536void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
537{
538    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
539    const size_t count = currentLayers.size();
540
541    /*
542     * Traversal of the children
543     * (perform the transaction for each of them if needed)
544     */
545
546    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
547    if (layersNeedTransaction) {
548        for (size_t i=0 ; i<count ; i++) {
549            const sp<LayerBase>& layer = currentLayers[i];
550            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
551            if (!trFlags) continue;
552
553            const uint32_t flags = layer->doTransaction(0);
554            if (flags & Layer::eVisibleRegion)
555                mVisibleRegionsDirty = true;
556        }
557    }
558
559    /*
560     * Perform our own transaction if needed
561     */
562
563    if (transactionFlags & eTransactionNeeded) {
564        if (mCurrentState.orientation != mDrawingState.orientation) {
565            // the orientation has changed, recompute all visible regions
566            // and invalidate everything.
567
568            const int dpy = 0;
569            const int orientation = mCurrentState.orientation;
570            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
571            GraphicPlane& plane(graphicPlane(dpy));
572            plane.setOrientation(orientation);
573
574            // update the shared control block
575            const DisplayHardware& hw(plane.displayHardware());
576            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
577            dcblk->orientation = orientation;
578            dcblk->w = plane.getWidth();
579            dcblk->h = plane.getHeight();
580
581            mVisibleRegionsDirty = true;
582            mDirtyRegion.set(hw.bounds());
583        }
584
585        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
586            // freezing or unfreezing the display -> trigger animation if needed
587            mFreezeDisplay = mCurrentState.freezeDisplay;
588            if (mFreezeDisplay)
589                 mFreezeDisplayTime = 0;
590        }
591
592        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
593            // layers have been added
594            mVisibleRegionsDirty = true;
595        }
596
597        // some layers might have been removed, so
598        // we need to update the regions they're exposing.
599        if (mLayersRemoved) {
600            mLayersRemoved = false;
601            mVisibleRegionsDirty = true;
602            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
603            const size_t count = previousLayers.size();
604            for (size_t i=0 ; i<count ; i++) {
605                const sp<LayerBase>& layer(previousLayers[i]);
606                if (currentLayers.indexOf( layer ) < 0) {
607                    // this layer is not visible anymore
608                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
609                }
610            }
611        }
612    }
613
614    commitTransaction();
615}
616
617sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
618{
619    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
620}
621
622void SurfaceFlinger::computeVisibleRegions(
623    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
624{
625    const GraphicPlane& plane(graphicPlane(0));
626    const Transform& planeTransform(plane.transform());
627    const DisplayHardware& hw(plane.displayHardware());
628    const Region screenRegion(hw.bounds());
629
630    Region aboveOpaqueLayers;
631    Region aboveCoveredLayers;
632    Region dirty;
633
634    bool secureFrameBuffer = false;
635
636    size_t i = currentLayers.size();
637    while (i--) {
638        const sp<LayerBase>& layer = currentLayers[i];
639        layer->validateVisibility(planeTransform);
640
641        // start with the whole surface at its current location
642        const Layer::State& s(layer->drawingState());
643
644        /*
645         * opaqueRegion: area of a surface that is fully opaque.
646         */
647        Region opaqueRegion;
648
649        /*
650         * visibleRegion: area of a surface that is visible on screen
651         * and not fully transparent. This is essentially the layer's
652         * footprint minus the opaque regions above it.
653         * Areas covered by a translucent surface are considered visible.
654         */
655        Region visibleRegion;
656
657        /*
658         * coveredRegion: area of a surface that is covered by all
659         * visible regions above it (which includes the translucent areas).
660         */
661        Region coveredRegion;
662
663
664        // handle hidden surfaces by setting the visible region to empty
665        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
666            const bool translucent = !layer->isOpaque();
667            const Rect bounds(layer->visibleBounds());
668            visibleRegion.set(bounds);
669            visibleRegion.andSelf(screenRegion);
670            if (!visibleRegion.isEmpty()) {
671                // Remove the transparent area from the visible region
672                if (translucent) {
673                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
674                }
675
676                // compute the opaque region
677                const int32_t layerOrientation = layer->getOrientation();
678                if (s.alpha==255 && !translucent &&
679                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
680                    // the opaque region is the layer's footprint
681                    opaqueRegion = visibleRegion;
682                }
683            }
684        }
685
686        // Clip the covered region to the visible region
687        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
688
689        // Update aboveCoveredLayers for next (lower) layer
690        aboveCoveredLayers.orSelf(visibleRegion);
691
692        // subtract the opaque region covered by the layers above us
693        visibleRegion.subtractSelf(aboveOpaqueLayers);
694
695        // compute this layer's dirty region
696        if (layer->contentDirty) {
697            // we need to invalidate the whole region
698            dirty = visibleRegion;
699            // as well, as the old visible region
700            dirty.orSelf(layer->visibleRegionScreen);
701            layer->contentDirty = false;
702        } else {
703            /* compute the exposed region:
704             *   the exposed region consists of two components:
705             *   1) what's VISIBLE now and was COVERED before
706             *   2) what's EXPOSED now less what was EXPOSED before
707             *
708             * note that (1) is conservative, we start with the whole
709             * visible region but only keep what used to be covered by
710             * something -- which mean it may have been exposed.
711             *
712             * (2) handles areas that were not covered by anything but got
713             * exposed because of a resize.
714             */
715            const Region newExposed = visibleRegion - coveredRegion;
716            const Region oldVisibleRegion = layer->visibleRegionScreen;
717            const Region oldCoveredRegion = layer->coveredRegionScreen;
718            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
719            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
720        }
721        dirty.subtractSelf(aboveOpaqueLayers);
722
723        // accumulate to the screen dirty region
724        dirtyRegion.orSelf(dirty);
725
726        // Update aboveOpaqueLayers for next (lower) layer
727        aboveOpaqueLayers.orSelf(opaqueRegion);
728
729        // Store the visible region is screen space
730        layer->setVisibleRegion(visibleRegion);
731        layer->setCoveredRegion(coveredRegion);
732
733        // If a secure layer is partially visible, lock-down the screen!
734        if (layer->isSecure() && !visibleRegion.isEmpty()) {
735            secureFrameBuffer = true;
736        }
737    }
738
739    // invalidate the areas where a layer was removed
740    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
741    mDirtyRegionRemovedLayer.clear();
742
743    mSecureFrameBuffer = secureFrameBuffer;
744    opaqueRegion = aboveOpaqueLayers;
745}
746
747
748void SurfaceFlinger::commitTransaction()
749{
750    mDrawingState = mCurrentState;
751    mResizeTransationPending = false;
752    mTransactionCV.broadcast();
753}
754
755void SurfaceFlinger::handlePageFlip()
756{
757    bool visibleRegions = mVisibleRegionsDirty;
758    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
759    visibleRegions |= lockPageFlip(currentLayers);
760
761        const DisplayHardware& hw = graphicPlane(0).displayHardware();
762        const Region screenRegion(hw.bounds());
763        if (visibleRegions) {
764            Region opaqueRegion;
765            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
766
767            /*
768             *  rebuild the visible layer list
769             */
770            const size_t count = currentLayers.size();
771            mVisibleLayersSortedByZ.clear();
772            mVisibleLayersSortedByZ.setCapacity(count);
773            for (size_t i=0 ; i<count ; i++) {
774                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
775                    mVisibleLayersSortedByZ.add(currentLayers[i]);
776            }
777
778            mWormholeRegion = screenRegion.subtract(opaqueRegion);
779            mVisibleRegionsDirty = false;
780            invalidateHwcGeometry();
781        }
782
783    unlockPageFlip(currentLayers);
784    mDirtyRegion.andSelf(screenRegion);
785}
786
787void SurfaceFlinger::invalidateHwcGeometry()
788{
789    mHwWorkListDirty = true;
790}
791
792bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
793{
794    bool recomputeVisibleRegions = false;
795    size_t count = currentLayers.size();
796    sp<LayerBase> const* layers = currentLayers.array();
797    for (size_t i=0 ; i<count ; i++) {
798        const sp<LayerBase>& layer(layers[i]);
799        layer->lockPageFlip(recomputeVisibleRegions);
800    }
801    return recomputeVisibleRegions;
802}
803
804void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
805{
806    const GraphicPlane& plane(graphicPlane(0));
807    const Transform& planeTransform(plane.transform());
808    size_t count = currentLayers.size();
809    sp<LayerBase> const* layers = currentLayers.array();
810    for (size_t i=0 ; i<count ; i++) {
811        const sp<LayerBase>& layer(layers[i]);
812        layer->unlockPageFlip(planeTransform, mDirtyRegion);
813    }
814}
815
816void SurfaceFlinger::handleWorkList()
817{
818    mHwWorkListDirty = false;
819    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
820    if (hwc.initCheck() == NO_ERROR) {
821        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
822        const size_t count = currentLayers.size();
823        hwc.createWorkList(count);
824        hwc_layer_t* const cur(hwc.getLayers());
825        for (size_t i=0 ; cur && i<count ; i++) {
826            currentLayers[i]->setGeometry(&cur[i]);
827            if (mDebugDisableHWC || mDebugRegion) {
828                cur[i].compositionType = HWC_FRAMEBUFFER;
829                cur[i].flags |= HWC_SKIP_LAYER;
830            }
831        }
832    }
833}
834
835void SurfaceFlinger::handleRepaint()
836{
837    // compute the invalid region
838    mSwapRegion.orSelf(mDirtyRegion);
839
840    if (UNLIKELY(mDebugRegion)) {
841        debugFlashRegions();
842    }
843
844    // set the frame buffer
845    const DisplayHardware& hw(graphicPlane(0).displayHardware());
846    glMatrixMode(GL_MODELVIEW);
847    glLoadIdentity();
848
849    uint32_t flags = hw.getFlags();
850    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
851        (flags & DisplayHardware::BUFFER_PRESERVED))
852    {
853        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
854        // takes a rectangle, we must make sure to update that whole
855        // rectangle in that case
856        if (flags & DisplayHardware::SWAP_RECTANGLE) {
857            // TODO: we really should be able to pass a region to
858            // SWAP_RECTANGLE so that we don't have to redraw all this.
859            mDirtyRegion.set(mSwapRegion.bounds());
860        } else {
861            // in the BUFFER_PRESERVED case, obviously, we can update only
862            // what's needed and nothing more.
863            // NOTE: this is NOT a common case, as preserving the backbuffer
864            // is costly and usually involves copying the whole update back.
865        }
866    } else {
867        if (flags & DisplayHardware::PARTIAL_UPDATES) {
868            // We need to redraw the rectangle that will be updated
869            // (pushed to the framebuffer).
870            // This is needed because PARTIAL_UPDATES only takes one
871            // rectangle instead of a region (see DisplayHardware::flip())
872            mDirtyRegion.set(mSwapRegion.bounds());
873        } else {
874            // we need to redraw everything (the whole screen)
875            mDirtyRegion.set(hw.bounds());
876            mSwapRegion = mDirtyRegion;
877        }
878    }
879
880    setupHardwareComposer(mDirtyRegion);
881    composeSurfaces(mDirtyRegion);
882
883    // update the swap region and clear the dirty region
884    mSwapRegion.orSelf(mDirtyRegion);
885    mDirtyRegion.clear();
886}
887
888void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
889{
890    const DisplayHardware& hw(graphicPlane(0).displayHardware());
891    HWComposer& hwc(hw.getHwComposer());
892    hwc_layer_t* const cur(hwc.getLayers());
893    if (!cur) {
894        return;
895    }
896
897    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
898    size_t count = layers.size();
899
900    LOGE_IF(hwc.getNumLayers() != count,
901            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
902            hwc.getNumLayers(), count);
903
904    // just to be extra-safe, use the smallest count
905    if (hwc.initCheck() == NO_ERROR) {
906        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
907    }
908
909    /*
910     *  update the per-frame h/w composer data for each layer
911     *  and build the transparent region of the FB
912     */
913    for (size_t i=0 ; i<count ; i++) {
914        const sp<LayerBase>& layer(layers[i]);
915        layer->setPerFrameData(&cur[i]);
916    }
917    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
918    status_t err = hwc.prepare();
919    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
920
921    if (err == NO_ERROR) {
922        // what's happening here is tricky.
923        // we want to clear all the layers with the CLEAR_FB flags
924        // that are opaque.
925        // however, since some GPU are efficient at preserving
926        // the backbuffer, we want to take advantage of that so we do the
927        // clear only in the dirty region (other areas will be preserved
928        // on those GPUs).
929        //   NOTE: on non backbuffer preserving GPU, the dirty region
930        //   has already been expanded as needed, so the code is correct
931        //   there too.
932        //
933        // However, the content of the framebuffer cannot be trusted when
934        // we switch to/from FB/OVERLAY, in which case we need to
935        // expand the dirty region to those areas too.
936        //
937        // Note also that there is a special case when switching from
938        // "no layers in FB" to "some layers in FB", where we need to redraw
939        // the entire FB, since some areas might contain uninitialized
940        // data.
941        //
942        // Also we want to make sure to not clear areas that belong to
943        // layers above that won't redraw (we would just erasing them),
944        // that is, we can't erase anything outside the dirty region.
945
946        Region transparent;
947
948        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
949            transparent.set(hw.getBounds());
950            dirtyInOut = transparent;
951        } else {
952            for (size_t i=0 ; i<count ; i++) {
953                const sp<LayerBase>& layer(layers[i]);
954                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
955                    transparent.orSelf(layer->visibleRegionScreen);
956                }
957                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
958                if (isOverlay != layer->isOverlay()) {
959                    // we transitioned to/from overlay, so add this layer
960                    // to the dirty region so the framebuffer can be either
961                    // cleared or redrawn.
962                    dirtyInOut.orSelf(layer->visibleRegionScreen);
963                }
964                layer->setOverlay(isOverlay);
965            }
966            // don't erase stuff outside the dirty region
967            transparent.andSelf(dirtyInOut);
968        }
969
970        /*
971         *  clear the area of the FB that need to be transparent
972         */
973        if (!transparent.isEmpty()) {
974            glClearColor(0,0,0,0);
975            Region::const_iterator it = transparent.begin();
976            Region::const_iterator const end = transparent.end();
977            const int32_t height = hw.getHeight();
978            while (it != end) {
979                const Rect& r(*it++);
980                const GLint sy = height - (r.top + r.height());
981                glScissor(r.left, sy, r.width(), r.height());
982                glClear(GL_COLOR_BUFFER_BIT);
983            }
984        }
985    }
986}
987
988void SurfaceFlinger::composeSurfaces(const Region& dirty)
989{
990    const DisplayHardware& hw(graphicPlane(0).displayHardware());
991    HWComposer& hwc(hw.getHwComposer());
992
993    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
994    if (UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
995        // should never happen unless the window manager has a bug
996        // draw something...
997        drawWormhole();
998    }
999
1000    /*
1001     * and then, render the layers targeted at the framebuffer
1002     */
1003    hwc_layer_t* const cur(hwc.getLayers());
1004    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1005    size_t count = layers.size();
1006    for (size_t i=0 ; i<count ; i++) {
1007        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1008            continue;
1009        }
1010        const sp<LayerBase>& layer(layers[i]);
1011        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1012        if (!clip.isEmpty()) {
1013            layer->draw(clip);
1014        }
1015    }
1016}
1017
1018void SurfaceFlinger::debugFlashRegions()
1019{
1020    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1021    const uint32_t flags = hw.getFlags();
1022    const int32_t height = hw.getHeight();
1023    if (mSwapRegion.isEmpty()) {
1024        return;
1025    }
1026
1027    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1028            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1029        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1030                mDirtyRegion.bounds() : hw.bounds());
1031        composeSurfaces(repaint);
1032    }
1033
1034    glDisable(GL_BLEND);
1035    glDisable(GL_DITHER);
1036    glDisable(GL_SCISSOR_TEST);
1037
1038    static int toggle = 0;
1039    toggle = 1 - toggle;
1040    if (toggle) {
1041        glColor4f(1, 0, 1, 1);
1042    } else {
1043        glColor4f(1, 1, 0, 1);
1044    }
1045
1046    Region::const_iterator it = mDirtyRegion.begin();
1047    Region::const_iterator const end = mDirtyRegion.end();
1048    while (it != end) {
1049        const Rect& r = *it++;
1050        GLfloat vertices[][2] = {
1051                { r.left,  height - r.top },
1052                { r.left,  height - r.bottom },
1053                { r.right, height - r.bottom },
1054                { r.right, height - r.top }
1055        };
1056        glVertexPointer(2, GL_FLOAT, 0, vertices);
1057        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1058    }
1059
1060    hw.flip(mSwapRegion);
1061
1062    if (mDebugRegion > 1)
1063        usleep(mDebugRegion * 1000);
1064
1065    glEnable(GL_SCISSOR_TEST);
1066}
1067
1068void SurfaceFlinger::drawWormhole() const
1069{
1070    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1071    if (region.isEmpty())
1072        return;
1073
1074    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1075    const int32_t width = hw.getWidth();
1076    const int32_t height = hw.getHeight();
1077
1078    glDisable(GL_BLEND);
1079    glDisable(GL_DITHER);
1080
1081    if (LIKELY(!mDebugBackground)) {
1082        glClearColor(0,0,0,0);
1083        Region::const_iterator it = region.begin();
1084        Region::const_iterator const end = region.end();
1085        while (it != end) {
1086            const Rect& r = *it++;
1087            const GLint sy = height - (r.top + r.height());
1088            glScissor(r.left, sy, r.width(), r.height());
1089            glClear(GL_COLOR_BUFFER_BIT);
1090        }
1091    } else {
1092        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1093                { width, height }, { 0, height }  };
1094        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1095        glVertexPointer(2, GL_SHORT, 0, vertices);
1096        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1097        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1098#if defined(GL_OES_EGL_image_external)
1099        if (GLExtensions::getInstance().haveTextureExternal()) {
1100            glDisable(GL_TEXTURE_EXTERNAL_OES);
1101        }
1102#endif
1103        glEnable(GL_TEXTURE_2D);
1104        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1105        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1106        glMatrixMode(GL_TEXTURE);
1107        glLoadIdentity();
1108        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1109        Region::const_iterator it = region.begin();
1110        Region::const_iterator const end = region.end();
1111        while (it != end) {
1112            const Rect& r = *it++;
1113            const GLint sy = height - (r.top + r.height());
1114            glScissor(r.left, sy, r.width(), r.height());
1115            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1116        }
1117        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1118        glDisable(GL_TEXTURE_2D);
1119        glLoadIdentity();
1120        glMatrixMode(GL_MODELVIEW);
1121    }
1122}
1123
1124void SurfaceFlinger::debugShowFPS() const
1125{
1126    static int mFrameCount;
1127    static int mLastFrameCount = 0;
1128    static nsecs_t mLastFpsTime = 0;
1129    static float mFps = 0;
1130    mFrameCount++;
1131    nsecs_t now = systemTime();
1132    nsecs_t diff = now - mLastFpsTime;
1133    if (diff > ms2ns(250)) {
1134        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1135        mLastFpsTime = now;
1136        mLastFrameCount = mFrameCount;
1137    }
1138    // XXX: mFPS has the value we want
1139 }
1140
1141status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1142{
1143    Mutex::Autolock _l(mStateLock);
1144    addLayer_l(layer);
1145    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1146    return NO_ERROR;
1147}
1148
1149status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1150{
1151    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1152    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1153}
1154
1155ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1156        const sp<LayerBaseClient>& lbc)
1157{
1158    // attach this layer to the client
1159    size_t name = client->attachLayer(lbc);
1160
1161    Mutex::Autolock _l(mStateLock);
1162
1163    // add this layer to the current state list
1164    addLayer_l(lbc);
1165
1166    return ssize_t(name);
1167}
1168
1169status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1170{
1171    Mutex::Autolock _l(mStateLock);
1172    status_t err = purgatorizeLayer_l(layer);
1173    if (err == NO_ERROR)
1174        setTransactionFlags(eTransactionNeeded);
1175    return err;
1176}
1177
1178status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1179{
1180    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1181    if (lbc != 0) {
1182        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1183    }
1184    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1185    if (index >= 0) {
1186        mLayersRemoved = true;
1187        return NO_ERROR;
1188    }
1189    return status_t(index);
1190}
1191
1192status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1193{
1194    // First add the layer to the purgatory list, which makes sure it won't
1195    // go away, then remove it from the main list (through a transaction).
1196    ssize_t err = removeLayer_l(layerBase);
1197    if (err >= 0) {
1198        mLayerPurgatory.add(layerBase);
1199    }
1200
1201    layerBase->onRemoved();
1202
1203    // it's possible that we don't find a layer, because it might
1204    // have been destroyed already -- this is not technically an error
1205    // from the user because there is a race between Client::destroySurface(),
1206    // ~Client() and ~ISurface().
1207    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1208}
1209
1210status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1211{
1212    layer->forceVisibilityTransaction();
1213    setTransactionFlags(eTraversalNeeded);
1214    return NO_ERROR;
1215}
1216
1217uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1218{
1219    return android_atomic_release_load(&mTransactionFlags);
1220}
1221
1222uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1223{
1224    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1225}
1226
1227uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1228{
1229    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1230    if ((old & flags)==0) { // wake the server up
1231        signalEvent();
1232    }
1233    return old;
1234}
1235
1236
1237void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1238        int orientation) {
1239    Mutex::Autolock _l(mStateLock);
1240
1241    uint32_t flags = 0;
1242    if (mCurrentState.orientation != orientation) {
1243        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1244            mCurrentState.orientation = orientation;
1245            flags |= eTransactionNeeded;
1246            mResizeTransationPending = true;
1247        } else if (orientation != eOrientationUnchanged) {
1248            LOGW("setTransactionState: ignoring unrecognized orientation: %d",
1249                    orientation);
1250        }
1251    }
1252
1253    const size_t count = state.size();
1254    for (size_t i=0 ; i<count ; i++) {
1255        const ComposerState& s(state[i]);
1256        sp<Client> client( static_cast<Client *>(s.client.get()) );
1257        flags |= setClientStateLocked(client, s.state);
1258    }
1259    if (flags) {
1260        setTransactionFlags(flags);
1261    }
1262
1263    signalEvent();
1264
1265    // if there is a transaction with a resize, wait for it to
1266    // take effect before returning.
1267    while (mResizeTransationPending) {
1268        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1269        if (CC_UNLIKELY(err != NO_ERROR)) {
1270            // just in case something goes wrong in SF, return to the
1271            // called after a few seconds.
1272            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1273            mResizeTransationPending = false;
1274            break;
1275        }
1276    }
1277}
1278
1279status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1280{
1281    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1282        return BAD_VALUE;
1283
1284    Mutex::Autolock _l(mStateLock);
1285    mCurrentState.freezeDisplay = 1;
1286    setTransactionFlags(eTransactionNeeded);
1287
1288    // flags is intended to communicate some sort of animation behavior
1289    // (for instance fading)
1290    return NO_ERROR;
1291}
1292
1293status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1294{
1295    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1296        return BAD_VALUE;
1297
1298    Mutex::Autolock _l(mStateLock);
1299    mCurrentState.freezeDisplay = 0;
1300    setTransactionFlags(eTransactionNeeded);
1301
1302    // flags is intended to communicate some sort of animation behavior
1303    // (for instance fading)
1304    return NO_ERROR;
1305}
1306
1307int SurfaceFlinger::setOrientation(DisplayID dpy,
1308        int orientation, uint32_t flags)
1309{
1310    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1311        return BAD_VALUE;
1312
1313    Mutex::Autolock _l(mStateLock);
1314    if (mCurrentState.orientation != orientation) {
1315        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1316            mCurrentState.orientationFlags = flags;
1317            mCurrentState.orientation = orientation;
1318            setTransactionFlags(eTransactionNeeded);
1319            mTransactionCV.wait(mStateLock);
1320        } else {
1321            orientation = BAD_VALUE;
1322        }
1323    }
1324    return orientation;
1325}
1326
1327sp<ISurface> SurfaceFlinger::createSurface(
1328        ISurfaceComposerClient::surface_data_t* params,
1329        const String8& name,
1330        const sp<Client>& client,
1331        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1332        uint32_t flags)
1333{
1334    sp<LayerBaseClient> layer;
1335    sp<ISurface> surfaceHandle;
1336
1337    if (int32_t(w|h) < 0) {
1338        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1339                int(w), int(h));
1340        return surfaceHandle;
1341    }
1342
1343    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1344    sp<Layer> normalLayer;
1345    switch (flags & eFXSurfaceMask) {
1346        case eFXSurfaceNormal:
1347            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1348            layer = normalLayer;
1349            break;
1350        case eFXSurfaceBlur:
1351            // for now we treat Blur as Dim, until we can implement it
1352            // efficiently.
1353        case eFXSurfaceDim:
1354            layer = createDimSurface(client, d, w, h, flags);
1355            break;
1356    }
1357
1358    if (layer != 0) {
1359        layer->initStates(w, h, flags);
1360        layer->setName(name);
1361        ssize_t token = addClientLayer(client, layer);
1362
1363        surfaceHandle = layer->getSurface();
1364        if (surfaceHandle != 0) {
1365            params->token = token;
1366            params->identity = layer->getIdentity();
1367            if (normalLayer != 0) {
1368                Mutex::Autolock _l(mStateLock);
1369                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1370            }
1371        }
1372
1373        setTransactionFlags(eTransactionNeeded);
1374    }
1375
1376    return surfaceHandle;
1377}
1378
1379sp<Layer> SurfaceFlinger::createNormalSurface(
1380        const sp<Client>& client, DisplayID display,
1381        uint32_t w, uint32_t h, uint32_t flags,
1382        PixelFormat& format)
1383{
1384    // initialize the surfaces
1385    switch (format) { // TODO: take h/w into account
1386    case PIXEL_FORMAT_TRANSPARENT:
1387    case PIXEL_FORMAT_TRANSLUCENT:
1388        format = PIXEL_FORMAT_RGBA_8888;
1389        break;
1390    case PIXEL_FORMAT_OPAQUE:
1391#ifdef NO_RGBX_8888
1392        format = PIXEL_FORMAT_RGB_565;
1393#else
1394        format = PIXEL_FORMAT_RGBX_8888;
1395#endif
1396        break;
1397    }
1398
1399#ifdef NO_RGBX_8888
1400    if (format == PIXEL_FORMAT_RGBX_8888)
1401        format = PIXEL_FORMAT_RGBA_8888;
1402#endif
1403
1404    sp<Layer> layer = new Layer(this, display, client);
1405    status_t err = layer->setBuffers(w, h, format, flags);
1406    if (LIKELY(err != NO_ERROR)) {
1407        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1408        layer.clear();
1409    }
1410    return layer;
1411}
1412
1413sp<LayerDim> SurfaceFlinger::createDimSurface(
1414        const sp<Client>& client, DisplayID display,
1415        uint32_t w, uint32_t h, uint32_t flags)
1416{
1417    sp<LayerDim> layer = new LayerDim(this, display, client);
1418    layer->initStates(w, h, flags);
1419    return layer;
1420}
1421
1422status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1423{
1424    /*
1425     * called by the window manager, when a surface should be marked for
1426     * destruction.
1427     *
1428     * The surface is removed from the current and drawing lists, but placed
1429     * in the purgatory queue, so it's not destroyed right-away (we need
1430     * to wait for all client's references to go away first).
1431     */
1432
1433    status_t err = NAME_NOT_FOUND;
1434    Mutex::Autolock _l(mStateLock);
1435    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1436    if (layer != 0) {
1437        err = purgatorizeLayer_l(layer);
1438        if (err == NO_ERROR) {
1439            setTransactionFlags(eTransactionNeeded);
1440        }
1441    }
1442    return err;
1443}
1444
1445status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1446{
1447    // called by ~ISurface() when all references are gone
1448    status_t err = NO_ERROR;
1449    sp<LayerBaseClient> l(layer.promote());
1450    if (l != NULL) {
1451        Mutex::Autolock _l(mStateLock);
1452        err = removeLayer_l(l);
1453        if (err == NAME_NOT_FOUND) {
1454            // The surface wasn't in the current list, which means it was
1455            // removed already, which means it is in the purgatory,
1456            // and need to be removed from there.
1457            ssize_t idx = mLayerPurgatory.remove(l);
1458            LOGE_IF(idx < 0,
1459                    "layer=%p is not in the purgatory list", l.get());
1460        }
1461        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1462                "error removing layer=%p (%s)", l.get(), strerror(-err));
1463    }
1464    return err;
1465}
1466
1467uint32_t SurfaceFlinger::setClientStateLocked(
1468        const sp<Client>& client,
1469        const layer_state_t& s)
1470{
1471    uint32_t flags = 0;
1472    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1473    if (layer != 0) {
1474        const uint32_t what = s.what;
1475        if (what & ePositionChanged) {
1476            if (layer->setPosition(s.x, s.y))
1477                flags |= eTraversalNeeded;
1478        }
1479        if (what & eLayerChanged) {
1480            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1481            if (layer->setLayer(s.z)) {
1482                mCurrentState.layersSortedByZ.removeAt(idx);
1483                mCurrentState.layersSortedByZ.add(layer);
1484                // we need traversal (state changed)
1485                // AND transaction (list changed)
1486                flags |= eTransactionNeeded|eTraversalNeeded;
1487            }
1488        }
1489        if (what & eSizeChanged) {
1490            if (layer->setSize(s.w, s.h)) {
1491                flags |= eTraversalNeeded;
1492                mResizeTransationPending = true;
1493            }
1494        }
1495        if (what & eAlphaChanged) {
1496            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1497                flags |= eTraversalNeeded;
1498        }
1499        if (what & eMatrixChanged) {
1500            if (layer->setMatrix(s.matrix))
1501                flags |= eTraversalNeeded;
1502        }
1503        if (what & eTransparentRegionChanged) {
1504            if (layer->setTransparentRegionHint(s.transparentRegion))
1505                flags |= eTraversalNeeded;
1506        }
1507        if (what & eVisibilityChanged) {
1508            if (layer->setFlags(s.flags, s.mask))
1509                flags |= eTraversalNeeded;
1510        }
1511    }
1512    return flags;
1513}
1514
1515void SurfaceFlinger::screenReleased(int dpy)
1516{
1517    // this may be called by a signal handler, we can't do too much in here
1518    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1519    signalEvent();
1520}
1521
1522void SurfaceFlinger::screenAcquired(int dpy)
1523{
1524    // this may be called by a signal handler, we can't do too much in here
1525    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1526    signalEvent();
1527}
1528
1529status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1530{
1531    const size_t SIZE = 4096;
1532    char buffer[SIZE];
1533    String8 result;
1534
1535    if (!PermissionCache::checkCallingPermission(sDump)) {
1536        snprintf(buffer, SIZE, "Permission Denial: "
1537                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1538                IPCThreadState::self()->getCallingPid(),
1539                IPCThreadState::self()->getCallingUid());
1540        result.append(buffer);
1541    } else {
1542
1543        // figure out if we're stuck somewhere
1544        const nsecs_t now = systemTime();
1545        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1546        const nsecs_t inTransaction(mDebugInTransaction);
1547        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1548        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1549
1550        // Try to get the main lock, but don't insist if we can't
1551        // (this would indicate SF is stuck, but we want to be able to
1552        // print something in dumpsys).
1553        int retry = 3;
1554        while (mStateLock.tryLock()<0 && --retry>=0) {
1555            usleep(1000000);
1556        }
1557        const bool locked(retry >= 0);
1558        if (!locked) {
1559            snprintf(buffer, SIZE,
1560                    "SurfaceFlinger appears to be unresponsive, "
1561                    "dumping anyways (no locks held)\n");
1562            result.append(buffer);
1563        }
1564
1565        /*
1566         * Dump the visible layer list
1567         */
1568        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1569        const size_t count = currentLayers.size();
1570        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1571        result.append(buffer);
1572        for (size_t i=0 ; i<count ; i++) {
1573            const sp<LayerBase>& layer(currentLayers[i]);
1574            layer->dump(result, buffer, SIZE);
1575            const Layer::State& s(layer->drawingState());
1576            s.transparentRegion.dump(result, "transparentRegion");
1577            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1578            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1579        }
1580
1581        /*
1582         * Dump the layers in the purgatory
1583         */
1584
1585        const size_t purgatorySize =  mLayerPurgatory.size();
1586        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1587        result.append(buffer);
1588        for (size_t i=0 ; i<purgatorySize ; i++) {
1589            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1590            layer->shortDump(result, buffer, SIZE);
1591        }
1592
1593        /*
1594         * Dump SurfaceFlinger global state
1595         */
1596
1597        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1598        result.append(buffer);
1599
1600        const GLExtensions& extensions(GLExtensions::getInstance());
1601        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1602                extensions.getVendor(),
1603                extensions.getRenderer(),
1604                extensions.getVersion());
1605        result.append(buffer);
1606        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1607        result.append(buffer);
1608
1609        mWormholeRegion.dump(result, "WormholeRegion");
1610        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1611        snprintf(buffer, SIZE,
1612                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1613                mFreezeDisplay?"yes":"no", mFreezeCount,
1614                mCurrentState.orientation, hw.canDraw());
1615        result.append(buffer);
1616        snprintf(buffer, SIZE,
1617                "  last eglSwapBuffers() time: %f us\n"
1618                "  last transaction time     : %f us\n",
1619                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1620        result.append(buffer);
1621
1622        if (inSwapBuffersDuration || !locked) {
1623            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1624                    inSwapBuffersDuration/1000.0);
1625            result.append(buffer);
1626        }
1627
1628        if (inTransactionDuration || !locked) {
1629            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1630                    inTransactionDuration/1000.0);
1631            result.append(buffer);
1632        }
1633
1634        /*
1635         * Dump HWComposer state
1636         */
1637        HWComposer& hwc(hw.getHwComposer());
1638        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1639                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1640                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1641        result.append(buffer);
1642        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1643
1644        /*
1645         * Dump gralloc state
1646         */
1647        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1648        alloc.dump(result);
1649        hw.dump(result);
1650
1651        if (locked) {
1652            mStateLock.unlock();
1653        }
1654    }
1655    write(fd, result.string(), result.size());
1656    return NO_ERROR;
1657}
1658
1659status_t SurfaceFlinger::onTransact(
1660    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1661{
1662    switch (code) {
1663        case CREATE_CONNECTION:
1664        case SET_TRANSACTION_STATE:
1665        case SET_ORIENTATION:
1666        case FREEZE_DISPLAY:
1667        case UNFREEZE_DISPLAY:
1668        case BOOT_FINISHED:
1669        case TURN_ELECTRON_BEAM_OFF:
1670        case TURN_ELECTRON_BEAM_ON:
1671        {
1672            // codes that require permission check
1673            IPCThreadState* ipc = IPCThreadState::self();
1674            const int pid = ipc->getCallingPid();
1675            const int uid = ipc->getCallingUid();
1676            if ((uid != AID_GRAPHICS) &&
1677                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1678                LOGE("Permission Denial: "
1679                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1680                return PERMISSION_DENIED;
1681            }
1682            break;
1683        }
1684        case CAPTURE_SCREEN:
1685        {
1686            // codes that require permission check
1687            IPCThreadState* ipc = IPCThreadState::self();
1688            const int pid = ipc->getCallingPid();
1689            const int uid = ipc->getCallingUid();
1690            if ((uid != AID_GRAPHICS) &&
1691                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1692                LOGE("Permission Denial: "
1693                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1694                return PERMISSION_DENIED;
1695            }
1696            break;
1697        }
1698    }
1699
1700    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1701    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1702        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1703        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1704            IPCThreadState* ipc = IPCThreadState::self();
1705            const int pid = ipc->getCallingPid();
1706            const int uid = ipc->getCallingUid();
1707            LOGE("Permission Denial: "
1708                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1709            return PERMISSION_DENIED;
1710        }
1711        int n;
1712        switch (code) {
1713            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1714            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1715                return NO_ERROR;
1716            case 1002:  // SHOW_UPDATES
1717                n = data.readInt32();
1718                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1719                invalidateHwcGeometry();
1720                repaintEverything();
1721                return NO_ERROR;
1722            case 1003:  // SHOW_BACKGROUND
1723                n = data.readInt32();
1724                mDebugBackground = n ? 1 : 0;
1725                return NO_ERROR;
1726            case 1004:{ // repaint everything
1727                repaintEverything();
1728                return NO_ERROR;
1729            }
1730            case 1005:{ // force transaction
1731                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1732                return NO_ERROR;
1733            }
1734            case 1006:{ // enable/disable GraphicLog
1735                int enabled = data.readInt32();
1736                GraphicLog::getInstance().setEnabled(enabled);
1737                return NO_ERROR;
1738            }
1739            case 1007: // set mFreezeCount
1740                mFreezeCount = data.readInt32();
1741                mFreezeDisplayTime = 0;
1742                return NO_ERROR;
1743            case 1008:  // toggle use of hw composer
1744                n = data.readInt32();
1745                mDebugDisableHWC = n ? 1 : 0;
1746                invalidateHwcGeometry();
1747                repaintEverything();
1748                return NO_ERROR;
1749            case 1009:  // toggle use of transform hint
1750                n = data.readInt32();
1751                mDebugDisableTransformHint = n ? 1 : 0;
1752                invalidateHwcGeometry();
1753                repaintEverything();
1754                return NO_ERROR;
1755            case 1010:  // interrogate.
1756                reply->writeInt32(0);
1757                reply->writeInt32(0);
1758                reply->writeInt32(mDebugRegion);
1759                reply->writeInt32(mDebugBackground);
1760                return NO_ERROR;
1761            case 1013: {
1762                Mutex::Autolock _l(mStateLock);
1763                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1764                reply->writeInt32(hw.getPageFlipCount());
1765            }
1766            return NO_ERROR;
1767        }
1768    }
1769    return err;
1770}
1771
1772void SurfaceFlinger::repaintEverything() {
1773    Mutex::Autolock _l(mStateLock);
1774    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1775    mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1776    signalEvent();
1777}
1778
1779// ---------------------------------------------------------------------------
1780
1781status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1782        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1783{
1784    if (!GLExtensions::getInstance().haveFramebufferObject())
1785        return INVALID_OPERATION;
1786
1787    // get screen geometry
1788    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1789    const uint32_t hw_w = hw.getWidth();
1790    const uint32_t hw_h = hw.getHeight();
1791    GLfloat u = 1;
1792    GLfloat v = 1;
1793
1794    // make sure to clear all GL error flags
1795    while ( glGetError() != GL_NO_ERROR ) ;
1796
1797    // create a FBO
1798    GLuint name, tname;
1799    glGenTextures(1, &tname);
1800    glBindTexture(GL_TEXTURE_2D, tname);
1801    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1802            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1803    if (glGetError() != GL_NO_ERROR) {
1804        while ( glGetError() != GL_NO_ERROR ) ;
1805        GLint tw = (2 << (31 - clz(hw_w)));
1806        GLint th = (2 << (31 - clz(hw_h)));
1807        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1808                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1809        u = GLfloat(hw_w) / tw;
1810        v = GLfloat(hw_h) / th;
1811    }
1812    glGenFramebuffersOES(1, &name);
1813    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1814    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1815            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1816
1817    // redraw the screen entirely...
1818    glClearColor(0,0,0,1);
1819    glClear(GL_COLOR_BUFFER_BIT);
1820    glMatrixMode(GL_MODELVIEW);
1821    glLoadIdentity();
1822    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1823    const size_t count = layers.size();
1824    for (size_t i=0 ; i<count ; ++i) {
1825        const sp<LayerBase>& layer(layers[i]);
1826        layer->drawForSreenShot();
1827    }
1828
1829    // back to main framebuffer
1830    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1831    glDisable(GL_SCISSOR_TEST);
1832    glDeleteFramebuffersOES(1, &name);
1833
1834    *textureName = tname;
1835    *uOut = u;
1836    *vOut = v;
1837    return NO_ERROR;
1838}
1839
1840// ---------------------------------------------------------------------------
1841
1842status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1843{
1844    status_t result = PERMISSION_DENIED;
1845
1846    if (!GLExtensions::getInstance().haveFramebufferObject())
1847        return INVALID_OPERATION;
1848
1849    // get screen geometry
1850    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1851    const uint32_t hw_w = hw.getWidth();
1852    const uint32_t hw_h = hw.getHeight();
1853    const Region screenBounds(hw.getBounds());
1854
1855    GLfloat u, v;
1856    GLuint tname;
1857    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1858    if (result != NO_ERROR) {
1859        return result;
1860    }
1861
1862    GLfloat vtx[8];
1863    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1864    glBindTexture(GL_TEXTURE_2D, tname);
1865    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1866    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1867    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1868    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1869    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1870    glVertexPointer(2, GL_FLOAT, 0, vtx);
1871
1872    /*
1873     * Texture coordinate mapping
1874     *
1875     *                 u
1876     *    1 +----------+---+
1877     *      |     |    |   |  image is inverted
1878     *      |     V    |   |  w.r.t. the texture
1879     *  1-v +----------+   |  coordinates
1880     *      |              |
1881     *      |              |
1882     *      |              |
1883     *    0 +--------------+
1884     *      0              1
1885     *
1886     */
1887
1888    class s_curve_interpolator {
1889        const float nbFrames, s, v;
1890    public:
1891        s_curve_interpolator(int nbFrames, float s)
1892        : nbFrames(1.0f / (nbFrames-1)), s(s),
1893          v(1.0f + expf(-s + 0.5f*s)) {
1894        }
1895        float operator()(int f) {
1896            const float x = f * nbFrames;
1897            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1898        }
1899    };
1900
1901    class v_stretch {
1902        const GLfloat hw_w, hw_h;
1903    public:
1904        v_stretch(uint32_t hw_w, uint32_t hw_h)
1905        : hw_w(hw_w), hw_h(hw_h) {
1906        }
1907        void operator()(GLfloat* vtx, float v) {
1908            const GLfloat w = hw_w + (hw_w * v);
1909            const GLfloat h = hw_h - (hw_h * v);
1910            const GLfloat x = (hw_w - w) * 0.5f;
1911            const GLfloat y = (hw_h - h) * 0.5f;
1912            vtx[0] = x;         vtx[1] = y;
1913            vtx[2] = x;         vtx[3] = y + h;
1914            vtx[4] = x + w;     vtx[5] = y + h;
1915            vtx[6] = x + w;     vtx[7] = y;
1916        }
1917    };
1918
1919    class h_stretch {
1920        const GLfloat hw_w, hw_h;
1921    public:
1922        h_stretch(uint32_t hw_w, uint32_t hw_h)
1923        : hw_w(hw_w), hw_h(hw_h) {
1924        }
1925        void operator()(GLfloat* vtx, float v) {
1926            const GLfloat w = hw_w - (hw_w * v);
1927            const GLfloat h = 1.0f;
1928            const GLfloat x = (hw_w - w) * 0.5f;
1929            const GLfloat y = (hw_h - h) * 0.5f;
1930            vtx[0] = x;         vtx[1] = y;
1931            vtx[2] = x;         vtx[3] = y + h;
1932            vtx[4] = x + w;     vtx[5] = y + h;
1933            vtx[6] = x + w;     vtx[7] = y;
1934        }
1935    };
1936
1937    // the full animation is 24 frames
1938    char value[PROPERTY_VALUE_MAX];
1939    property_get("debug.sf.electron_frames", value, "24");
1940    int nbFrames = (atoi(value) + 1) >> 1;
1941    if (nbFrames <= 0) // just in case
1942        nbFrames = 24;
1943
1944    s_curve_interpolator itr(nbFrames, 7.5f);
1945    s_curve_interpolator itg(nbFrames, 8.0f);
1946    s_curve_interpolator itb(nbFrames, 8.5f);
1947
1948    v_stretch vverts(hw_w, hw_h);
1949
1950    glMatrixMode(GL_TEXTURE);
1951    glLoadIdentity();
1952    glMatrixMode(GL_MODELVIEW);
1953    glLoadIdentity();
1954
1955    glEnable(GL_BLEND);
1956    glBlendFunc(GL_ONE, GL_ONE);
1957    for (int i=0 ; i<nbFrames ; i++) {
1958        float x, y, w, h;
1959        const float vr = itr(i);
1960        const float vg = itg(i);
1961        const float vb = itb(i);
1962
1963        // clear screen
1964        glColorMask(1,1,1,1);
1965        glClear(GL_COLOR_BUFFER_BIT);
1966        glEnable(GL_TEXTURE_2D);
1967
1968        // draw the red plane
1969        vverts(vtx, vr);
1970        glColorMask(1,0,0,1);
1971        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1972
1973        // draw the green plane
1974        vverts(vtx, vg);
1975        glColorMask(0,1,0,1);
1976        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1977
1978        // draw the blue plane
1979        vverts(vtx, vb);
1980        glColorMask(0,0,1,1);
1981        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1982
1983        // draw the white highlight (we use the last vertices)
1984        glDisable(GL_TEXTURE_2D);
1985        glColorMask(1,1,1,1);
1986        glColor4f(vg, vg, vg, 1);
1987        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1988        hw.flip(screenBounds);
1989    }
1990
1991    h_stretch hverts(hw_w, hw_h);
1992    glDisable(GL_BLEND);
1993    glDisable(GL_TEXTURE_2D);
1994    glColorMask(1,1,1,1);
1995    for (int i=0 ; i<nbFrames ; i++) {
1996        const float v = itg(i);
1997        hverts(vtx, v);
1998        glClear(GL_COLOR_BUFFER_BIT);
1999        glColor4f(1-v, 1-v, 1-v, 1);
2000        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2001        hw.flip(screenBounds);
2002    }
2003
2004    glColorMask(1,1,1,1);
2005    glEnable(GL_SCISSOR_TEST);
2006    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2007    glDeleteTextures(1, &tname);
2008    glDisable(GL_TEXTURE_2D);
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
2154    return NO_ERROR;
2155}
2156
2157// ---------------------------------------------------------------------------
2158
2159status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2160{
2161    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2162    if (!hw.canDraw()) {
2163        // we're already off
2164        return NO_ERROR;
2165    }
2166
2167    // turn off hwc while we're doing the animation
2168    hw.getHwComposer().disable();
2169    // and make sure to turn it back on (if needed) next time we compose
2170    invalidateHwcGeometry();
2171
2172    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2173        electronBeamOffAnimationImplLocked();
2174    }
2175
2176    // always clear the whole screen at the end of the animation
2177    glClearColor(0,0,0,1);
2178    glDisable(GL_SCISSOR_TEST);
2179    glClear(GL_COLOR_BUFFER_BIT);
2180    glEnable(GL_SCISSOR_TEST);
2181    hw.flip( Region(hw.bounds()) );
2182
2183    return NO_ERROR;
2184}
2185
2186status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2187{
2188    class MessageTurnElectronBeamOff : public MessageBase {
2189        SurfaceFlinger* flinger;
2190        int32_t mode;
2191        status_t result;
2192    public:
2193        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2194            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2195        }
2196        status_t getResult() const {
2197            return result;
2198        }
2199        virtual bool handler() {
2200            Mutex::Autolock _l(flinger->mStateLock);
2201            result = flinger->turnElectronBeamOffImplLocked(mode);
2202            return true;
2203        }
2204    };
2205
2206    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2207    status_t res = postMessageSync(msg);
2208    if (res == NO_ERROR) {
2209        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2210
2211        // work-around: when the power-manager calls us we activate the
2212        // animation. eventually, the "on" animation will be called
2213        // by the power-manager itself
2214        mElectronBeamAnimationMode = mode;
2215    }
2216    return res;
2217}
2218
2219// ---------------------------------------------------------------------------
2220
2221status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2222{
2223    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2224    if (hw.canDraw()) {
2225        // we're already on
2226        return NO_ERROR;
2227    }
2228    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2229        electronBeamOnAnimationImplLocked();
2230    }
2231
2232    // make sure to redraw the whole screen when the animation is done
2233    mDirtyRegion.set(hw.bounds());
2234    signalEvent();
2235
2236    return NO_ERROR;
2237}
2238
2239status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2240{
2241    class MessageTurnElectronBeamOn : public MessageBase {
2242        SurfaceFlinger* flinger;
2243        int32_t mode;
2244        status_t result;
2245    public:
2246        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2247            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2248        }
2249        status_t getResult() const {
2250            return result;
2251        }
2252        virtual bool handler() {
2253            Mutex::Autolock _l(flinger->mStateLock);
2254            result = flinger->turnElectronBeamOnImplLocked(mode);
2255            return true;
2256        }
2257    };
2258
2259    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2260    return NO_ERROR;
2261}
2262
2263// ---------------------------------------------------------------------------
2264
2265status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2266        sp<IMemoryHeap>* heap,
2267        uint32_t* w, uint32_t* h, PixelFormat* f,
2268        uint32_t sw, uint32_t sh,
2269        uint32_t minLayerZ, uint32_t maxLayerZ)
2270{
2271    status_t result = PERMISSION_DENIED;
2272
2273    // only one display supported for now
2274    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2275        return BAD_VALUE;
2276
2277    if (!GLExtensions::getInstance().haveFramebufferObject())
2278        return INVALID_OPERATION;
2279
2280    // get screen geometry
2281    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2282    const uint32_t hw_w = hw.getWidth();
2283    const uint32_t hw_h = hw.getHeight();
2284
2285    if ((sw > hw_w) || (sh > hw_h))
2286        return BAD_VALUE;
2287
2288    sw = (!sw) ? hw_w : sw;
2289    sh = (!sh) ? hw_h : sh;
2290    const size_t size = sw * sh * 4;
2291
2292    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2293    //        sw, sh, minLayerZ, maxLayerZ);
2294
2295    // make sure to clear all GL error flags
2296    while ( glGetError() != GL_NO_ERROR ) ;
2297
2298    // create a FBO
2299    GLuint name, tname;
2300    glGenRenderbuffersOES(1, &tname);
2301    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2302    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2303    glGenFramebuffersOES(1, &name);
2304    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2305    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2306            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2307
2308    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2309
2310    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2311
2312        // invert everything, b/c glReadPixel() below will invert the FB
2313        glViewport(0, 0, sw, sh);
2314        glScissor(0, 0, sw, sh);
2315        glEnable(GL_SCISSOR_TEST);
2316        glMatrixMode(GL_PROJECTION);
2317        glPushMatrix();
2318        glLoadIdentity();
2319        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2320        glMatrixMode(GL_MODELVIEW);
2321
2322        // redraw the screen entirely...
2323        glClearColor(0,0,0,1);
2324        glClear(GL_COLOR_BUFFER_BIT);
2325
2326        const LayerVector& layers(mDrawingState.layersSortedByZ);
2327        const size_t count = layers.size();
2328        for (size_t i=0 ; i<count ; ++i) {
2329            const sp<LayerBase>& layer(layers[i]);
2330            const uint32_t flags = layer->drawingState().flags;
2331            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2332                const uint32_t z = layer->drawingState().z;
2333                if (z >= minLayerZ && z <= maxLayerZ) {
2334                    layer->drawForSreenShot();
2335                }
2336            }
2337        }
2338
2339        // XXX: this is needed on tegra
2340        glEnable(GL_SCISSOR_TEST);
2341        glScissor(0, 0, sw, sh);
2342
2343        // check for errors and return screen capture
2344        if (glGetError() != GL_NO_ERROR) {
2345            // error while rendering
2346            result = INVALID_OPERATION;
2347        } else {
2348            // allocate shared memory large enough to hold the
2349            // screen capture
2350            sp<MemoryHeapBase> base(
2351                    new MemoryHeapBase(size, 0, "screen-capture") );
2352            void* const ptr = base->getBase();
2353            if (ptr) {
2354                // capture the screen with glReadPixels()
2355                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2356                if (glGetError() == GL_NO_ERROR) {
2357                    *heap = base;
2358                    *w = sw;
2359                    *h = sh;
2360                    *f = PIXEL_FORMAT_RGBA_8888;
2361                    result = NO_ERROR;
2362                }
2363            } else {
2364                result = NO_MEMORY;
2365            }
2366        }
2367        glEnable(GL_SCISSOR_TEST);
2368        glViewport(0, 0, hw_w, hw_h);
2369        glMatrixMode(GL_PROJECTION);
2370        glPopMatrix();
2371        glMatrixMode(GL_MODELVIEW);
2372    } else {
2373        result = BAD_VALUE;
2374    }
2375
2376    // release FBO resources
2377    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2378    glDeleteRenderbuffersOES(1, &tname);
2379    glDeleteFramebuffersOES(1, &name);
2380
2381    hw.compositionComplete();
2382
2383    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2384
2385    return result;
2386}
2387
2388
2389status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2390        sp<IMemoryHeap>* heap,
2391        uint32_t* width, uint32_t* height, PixelFormat* format,
2392        uint32_t sw, uint32_t sh,
2393        uint32_t minLayerZ, uint32_t maxLayerZ)
2394{
2395    // only one display supported for now
2396    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2397        return BAD_VALUE;
2398
2399    if (!GLExtensions::getInstance().haveFramebufferObject())
2400        return INVALID_OPERATION;
2401
2402    class MessageCaptureScreen : public MessageBase {
2403        SurfaceFlinger* flinger;
2404        DisplayID dpy;
2405        sp<IMemoryHeap>* heap;
2406        uint32_t* w;
2407        uint32_t* h;
2408        PixelFormat* f;
2409        uint32_t sw;
2410        uint32_t sh;
2411        uint32_t minLayerZ;
2412        uint32_t maxLayerZ;
2413        status_t result;
2414    public:
2415        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2416                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2417                uint32_t sw, uint32_t sh,
2418                uint32_t minLayerZ, uint32_t maxLayerZ)
2419            : flinger(flinger), dpy(dpy),
2420              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2421              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2422              result(PERMISSION_DENIED)
2423        {
2424        }
2425        status_t getResult() const {
2426            return result;
2427        }
2428        virtual bool handler() {
2429            Mutex::Autolock _l(flinger->mStateLock);
2430
2431            // if we have secure windows, never allow the screen capture
2432            if (flinger->mSecureFrameBuffer)
2433                return true;
2434
2435            result = flinger->captureScreenImplLocked(dpy,
2436                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2437
2438            return true;
2439        }
2440    };
2441
2442    sp<MessageBase> msg = new MessageCaptureScreen(this,
2443            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2444    status_t res = postMessageSync(msg);
2445    if (res == NO_ERROR) {
2446        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2447    }
2448    return res;
2449}
2450
2451// ---------------------------------------------------------------------------
2452
2453sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2454{
2455    sp<Layer> result;
2456    Mutex::Autolock _l(mStateLock);
2457    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2458    return result;
2459}
2460
2461// ---------------------------------------------------------------------------
2462
2463Client::Client(const sp<SurfaceFlinger>& flinger)
2464    : mFlinger(flinger), mNameGenerator(1)
2465{
2466}
2467
2468Client::~Client()
2469{
2470    const size_t count = mLayers.size();
2471    for (size_t i=0 ; i<count ; i++) {
2472        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2473        if (layer != 0) {
2474            mFlinger->removeLayer(layer);
2475        }
2476    }
2477}
2478
2479status_t Client::initCheck() const {
2480    return NO_ERROR;
2481}
2482
2483size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2484{
2485    Mutex::Autolock _l(mLock);
2486    size_t name = mNameGenerator++;
2487    mLayers.add(name, layer);
2488    return name;
2489}
2490
2491void Client::detachLayer(const LayerBaseClient* layer)
2492{
2493    Mutex::Autolock _l(mLock);
2494    // we do a linear search here, because this doesn't happen often
2495    const size_t count = mLayers.size();
2496    for (size_t i=0 ; i<count ; i++) {
2497        if (mLayers.valueAt(i) == layer) {
2498            mLayers.removeItemsAt(i, 1);
2499            break;
2500        }
2501    }
2502}
2503sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2504{
2505    Mutex::Autolock _l(mLock);
2506    sp<LayerBaseClient> lbc;
2507    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2508    if (layer != 0) {
2509        lbc = layer.promote();
2510        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2511    }
2512    return lbc;
2513}
2514
2515
2516status_t Client::onTransact(
2517    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2518{
2519    // these must be checked
2520     IPCThreadState* ipc = IPCThreadState::self();
2521     const int pid = ipc->getCallingPid();
2522     const int uid = ipc->getCallingUid();
2523     const int self_pid = getpid();
2524     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2525         // we're called from a different process, do the real check
2526         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2527         {
2528             LOGE("Permission Denial: "
2529                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2530             return PERMISSION_DENIED;
2531         }
2532     }
2533     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2534}
2535
2536
2537sp<ISurface> Client::createSurface(
2538        ISurfaceComposerClient::surface_data_t* params,
2539        const String8& name,
2540        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2541        uint32_t flags)
2542{
2543    /*
2544     * createSurface must be called from the GL thread so that it can
2545     * have access to the GL context.
2546     */
2547
2548    class MessageCreateSurface : public MessageBase {
2549        sp<ISurface> result;
2550        SurfaceFlinger* flinger;
2551        ISurfaceComposerClient::surface_data_t* params;
2552        Client* client;
2553        const String8& name;
2554        DisplayID display;
2555        uint32_t w, h;
2556        PixelFormat format;
2557        uint32_t flags;
2558    public:
2559        MessageCreateSurface(SurfaceFlinger* flinger,
2560                ISurfaceComposerClient::surface_data_t* params,
2561                const String8& name, Client* client,
2562                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2563                uint32_t flags)
2564            : flinger(flinger), params(params), client(client), name(name),
2565              display(display), w(w), h(h), format(format), flags(flags)
2566        {
2567        }
2568        sp<ISurface> getResult() const { return result; }
2569        virtual bool handler() {
2570            result = flinger->createSurface(params, name, client,
2571                    display, w, h, format, flags);
2572            return true;
2573        }
2574    };
2575
2576    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2577            params, name, this, display, w, h, format, flags);
2578    mFlinger->postMessageSync(msg);
2579    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2580}
2581status_t Client::destroySurface(SurfaceID sid) {
2582    return mFlinger->removeSurface(this, sid);
2583}
2584
2585// ---------------------------------------------------------------------------
2586
2587GraphicBufferAlloc::GraphicBufferAlloc() {}
2588
2589GraphicBufferAlloc::~GraphicBufferAlloc() {}
2590
2591sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2592        PixelFormat format, uint32_t usage, status_t* error) {
2593    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2594    status_t err = graphicBuffer->initCheck();
2595    *error = err;
2596    if (err != 0 || graphicBuffer->handle == 0) {
2597        if (err == NO_MEMORY) {
2598            GraphicBuffer::dumpAllocationsToSystemLog();
2599        }
2600        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2601             "failed (%s), handle=%p",
2602                w, h, strerror(-err), graphicBuffer->handle);
2603        return 0;
2604    }
2605    return graphicBuffer;
2606}
2607
2608// ---------------------------------------------------------------------------
2609
2610GraphicPlane::GraphicPlane()
2611    : mHw(0)
2612{
2613}
2614
2615GraphicPlane::~GraphicPlane() {
2616    delete mHw;
2617}
2618
2619bool GraphicPlane::initialized() const {
2620    return mHw ? true : false;
2621}
2622
2623int GraphicPlane::getWidth() const {
2624    return mWidth;
2625}
2626
2627int GraphicPlane::getHeight() const {
2628    return mHeight;
2629}
2630
2631void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2632{
2633    mHw = hw;
2634
2635    // initialize the display orientation transform.
2636    // it's a constant that should come from the display driver.
2637    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2638    char property[PROPERTY_VALUE_MAX];
2639    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2640        //displayOrientation
2641        switch (atoi(property)) {
2642        case 90:
2643            displayOrientation = ISurfaceComposer::eOrientation90;
2644            break;
2645        case 270:
2646            displayOrientation = ISurfaceComposer::eOrientation270;
2647            break;
2648        }
2649    }
2650
2651    const float w = hw->getWidth();
2652    const float h = hw->getHeight();
2653    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2654            &mDisplayTransform);
2655    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2656        mDisplayWidth = h;
2657        mDisplayHeight = w;
2658    } else {
2659        mDisplayWidth = w;
2660        mDisplayHeight = h;
2661    }
2662
2663    setOrientation(ISurfaceComposer::eOrientationDefault);
2664}
2665
2666status_t GraphicPlane::orientationToTransfrom(
2667        int orientation, int w, int h, Transform* tr)
2668{
2669    uint32_t flags = 0;
2670    switch (orientation) {
2671    case ISurfaceComposer::eOrientationDefault:
2672        flags = Transform::ROT_0;
2673        break;
2674    case ISurfaceComposer::eOrientation90:
2675        flags = Transform::ROT_90;
2676        break;
2677    case ISurfaceComposer::eOrientation180:
2678        flags = Transform::ROT_180;
2679        break;
2680    case ISurfaceComposer::eOrientation270:
2681        flags = Transform::ROT_270;
2682        break;
2683    default:
2684        return BAD_VALUE;
2685    }
2686    tr->set(flags, w, h);
2687    return NO_ERROR;
2688}
2689
2690status_t GraphicPlane::setOrientation(int orientation)
2691{
2692    // If the rotation can be handled in hardware, this is where
2693    // the magic should happen.
2694
2695    const DisplayHardware& hw(displayHardware());
2696    const float w = mDisplayWidth;
2697    const float h = mDisplayHeight;
2698    mWidth = int(w);
2699    mHeight = int(h);
2700
2701    Transform orientationTransform;
2702    GraphicPlane::orientationToTransfrom(orientation, w, h,
2703            &orientationTransform);
2704    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2705        mWidth = int(h);
2706        mHeight = int(w);
2707    }
2708
2709    mOrientation = orientation;
2710    mGlobalTransform = mDisplayTransform * orientationTransform;
2711    return NO_ERROR;
2712}
2713
2714const DisplayHardware& GraphicPlane::displayHardware() const {
2715    return *mHw;
2716}
2717
2718DisplayHardware& GraphicPlane::editDisplayHardware() {
2719    return *mHw;
2720}
2721
2722const Transform& GraphicPlane::transform() const {
2723    return mGlobalTransform;
2724}
2725
2726EGLDisplay GraphicPlane::getEGLDisplay() const {
2727    return mHw->getEGLDisplay();
2728}
2729
2730// ---------------------------------------------------------------------------
2731
2732}; // namespace android
2733