SurfaceFlinger.cpp revision 818fb243572f8e1f408ba9fc35ef61bbedbd9ce1 
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 "LayerScreenshot.h"
54#include "SurfaceFlinger.h"
55
56#include "DisplayHardware/DisplayHardware.h"
57#include "DisplayHardware/HWComposer.h"
58
59#include <private/surfaceflinger/SharedBufferStack.h>
60
61/* ideally AID_GRAPHICS would be in a semi-public header
62 * or there would be a way to map a user/group name to its id
63 */
64#ifndef AID_GRAPHICS
65#define AID_GRAPHICS 1003
66#endif
67
68#define DISPLAY_COUNT       1
69
70namespace android {
71// ---------------------------------------------------------------------------
72
73const String16 sHardwareTest("android.permission.HARDWARE_TEST");
74const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
75const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
76const String16 sDump("android.permission.DUMP");
77
78// ---------------------------------------------------------------------------
79
80SurfaceFlinger::SurfaceFlinger()
81    :   BnSurfaceComposer(), Thread(false),
82        mTransactionFlags(0),
83        mTransationPending(false),
84        mLayersRemoved(false),
85        mBootTime(systemTime()),
86        mVisibleRegionsDirty(false),
87        mHwWorkListDirty(false),
88        mElectronBeamAnimationMode(0),
89        mDebugRegion(0),
90        mDebugBackground(0),
91        mDebugDDMS(0),
92        mDebugDisableHWC(0),
93        mDebugDisableTransformHint(0),
94        mDebugInSwapBuffers(0),
95        mLastSwapBufferTime(0),
96        mDebugInTransaction(0),
97        mLastTransactionTime(0),
98        mBootFinished(false),
99        mConsoleSignals(0),
100        mSecureFrameBuffer(0)
101{
102    init();
103}
104
105void SurfaceFlinger::init()
106{
107    LOGI("SurfaceFlinger is starting");
108
109    // debugging stuff...
110    char value[PROPERTY_VALUE_MAX];
111
112    property_get("debug.sf.showupdates", value, "0");
113    mDebugRegion = atoi(value);
114
115    property_get("debug.sf.showbackground", value, "0");
116    mDebugBackground = atoi(value);
117
118    property_get("debug.sf.ddms", value, "0");
119    mDebugDDMS = atoi(value);
120    if (mDebugDDMS) {
121        DdmConnection::start(getServiceName());
122    }
123
124    LOGI_IF(mDebugRegion,       "showupdates enabled");
125    LOGI_IF(mDebugBackground,   "showbackground enabled");
126    LOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
127}
128
129SurfaceFlinger::~SurfaceFlinger()
130{
131    glDeleteTextures(1, &mWormholeTexName);
132}
133
134sp<IMemoryHeap> SurfaceFlinger::getCblk() const
135{
136    return mServerHeap;
137}
138
139sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
140{
141    sp<ISurfaceComposerClient> bclient;
142    sp<Client> client(new Client(this));
143    status_t err = client->initCheck();
144    if (err == NO_ERROR) {
145        bclient = client;
146    }
147    return bclient;
148}
149
150sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
151{
152    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
153    return gba;
154}
155
156const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
157{
158    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
159    const GraphicPlane& plane(mGraphicPlanes[dpy]);
160    return plane;
161}
162
163GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
164{
165    return const_cast<GraphicPlane&>(
166        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
167}
168
169void SurfaceFlinger::bootFinished()
170{
171    const nsecs_t now = systemTime();
172    const nsecs_t duration = now - mBootTime;
173    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
174    mBootFinished = true;
175
176    // wait patiently for the window manager death
177    const String16 name("window");
178    sp<IBinder> window(defaultServiceManager()->getService(name));
179    if (window != 0) {
180        window->linkToDeath(this);
181    }
182
183    // stop boot animation
184    property_set("ctl.stop", "bootanim");
185}
186
187void SurfaceFlinger::binderDied(const wp<IBinder>& who)
188{
189    // the window manager died on us. prepare its eulogy.
190
191    // reset screen orientation
192    setOrientation(0, eOrientationDefault, 0);
193
194    // restart the boot-animation
195    property_set("ctl.start", "bootanim");
196}
197
198void SurfaceFlinger::onFirstRef()
199{
200    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
201
202    // Wait for the main thread to be done with its initialization
203    mReadyToRunBarrier.wait();
204}
205
206static inline uint16_t pack565(int r, int g, int b) {
207    return (r<<11)|(g<<5)|b;
208}
209
210status_t SurfaceFlinger::readyToRun()
211{
212    LOGI(   "SurfaceFlinger's main thread ready to run. "
213            "Initializing graphics H/W...");
214
215    // we only support one display currently
216    int dpy = 0;
217
218    {
219        // initialize the main display
220        GraphicPlane& plane(graphicPlane(dpy));
221        DisplayHardware* const hw = new DisplayHardware(this, dpy);
222        plane.setDisplayHardware(hw);
223    }
224
225    // create the shared control-block
226    mServerHeap = new MemoryHeapBase(4096,
227            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
228    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
229
230    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
231    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
232
233    new(mServerCblk) surface_flinger_cblk_t;
234
235    // initialize primary screen
236    // (other display should be initialized in the same manner, but
237    // asynchronously, as they could come and go. None of this is supported
238    // yet).
239    const GraphicPlane& plane(graphicPlane(dpy));
240    const DisplayHardware& hw = plane.displayHardware();
241    const uint32_t w = hw.getWidth();
242    const uint32_t h = hw.getHeight();
243    const uint32_t f = hw.getFormat();
244    hw.makeCurrent();
245
246    // initialize the shared control block
247    mServerCblk->connected |= 1<<dpy;
248    display_cblk_t* dcblk = mServerCblk->displays + dpy;
249    memset(dcblk, 0, sizeof(display_cblk_t));
250    dcblk->w            = plane.getWidth();
251    dcblk->h            = plane.getHeight();
252    dcblk->format       = f;
253    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
254    dcblk->xdpi         = hw.getDpiX();
255    dcblk->ydpi         = hw.getDpiY();
256    dcblk->fps          = hw.getRefreshRate();
257    dcblk->density      = hw.getDensity();
258
259    // Initialize OpenGL|ES
260    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
261    glPixelStorei(GL_PACK_ALIGNMENT, 4);
262    glEnableClientState(GL_VERTEX_ARRAY);
263    glEnable(GL_SCISSOR_TEST);
264    glShadeModel(GL_FLAT);
265    glDisable(GL_DITHER);
266    glDisable(GL_CULL_FACE);
267
268    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
269    const uint16_t g1 = pack565(0x17,0x2f,0x17);
270    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
271    glGenTextures(1, &mWormholeTexName);
272    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
273    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
274    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
275    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
276    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
277    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
278            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
279
280    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
281    glGenTextures(1, &mProtectedTexName);
282    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
284    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
285    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
286    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
287    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
288            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
289
290    glViewport(0, 0, w, h);
291    glMatrixMode(GL_PROJECTION);
292    glLoadIdentity();
293    // put the origin in the left-bottom corner
294    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
295
296    mReadyToRunBarrier.open();
297
298    /*
299     *  We're now ready to accept clients...
300     */
301
302    // start boot animation
303    property_set("ctl.start", "bootanim");
304
305    return NO_ERROR;
306}
307
308// ----------------------------------------------------------------------------
309#if 0
310#pragma mark -
311#pragma mark Events Handler
312#endif
313
314void SurfaceFlinger::waitForEvent()
315{
316    while (true) {
317        nsecs_t timeout = -1;
318        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
319        if (msg != 0) {
320            switch (msg->what) {
321                case MessageQueue::INVALIDATE:
322                    // invalidate message, just return to the main loop
323                    return;
324            }
325        }
326    }
327}
328
329void SurfaceFlinger::signalEvent() {
330    mEventQueue.invalidate();
331}
332
333bool SurfaceFlinger::authenticateSurfaceTexture(
334        const sp<ISurfaceTexture>& surfaceTexture) const {
335    Mutex::Autolock _l(mStateLock);
336    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
337
338    // Check the visible layer list for the ISurface
339    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
340    size_t count = currentLayers.size();
341    for (size_t i=0 ; i<count ; i++) {
342        const sp<LayerBase>& layer(currentLayers[i]);
343        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
344        if (lbc != NULL) {
345            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
346            if (lbcBinder == surfaceTextureBinder) {
347                return true;
348            }
349        }
350    }
351
352    // Check the layers in the purgatory.  This check is here so that if a
353    // SurfaceTexture gets destroyed before all the clients are done using it,
354    // the error will not be reported as "surface XYZ is not authenticated", but
355    // will instead fail later on when the client tries to use the surface,
356    // which should be reported as "surface XYZ returned an -ENODEV".  The
357    // purgatorized layers are no less authentic than the visible ones, so this
358    // should not cause any harm.
359    size_t purgatorySize =  mLayerPurgatory.size();
360    for (size_t i=0 ; i<purgatorySize ; i++) {
361        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
362        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
363        if (lbc != NULL) {
364            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
365            if (lbcBinder == surfaceTextureBinder) {
366                return true;
367            }
368        }
369    }
370
371    return false;
372}
373
374status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
375        nsecs_t reltime, uint32_t flags)
376{
377    return mEventQueue.postMessage(msg, reltime, flags);
378}
379
380status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
381        nsecs_t reltime, uint32_t flags)
382{
383    status_t res = mEventQueue.postMessage(msg, reltime, flags);
384    if (res == NO_ERROR) {
385        msg->wait();
386    }
387    return res;
388}
389
390// ----------------------------------------------------------------------------
391#if 0
392#pragma mark -
393#pragma mark Main loop
394#endif
395
396bool SurfaceFlinger::threadLoop()
397{
398    waitForEvent();
399
400    // check for transactions
401    if (UNLIKELY(mConsoleSignals)) {
402        handleConsoleEvents();
403    }
404
405    // if we're in a global transaction, don't do anything.
406    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
407    uint32_t transactionFlags = peekTransactionFlags(mask);
408    if (UNLIKELY(transactionFlags)) {
409        handleTransaction(transactionFlags);
410    }
411
412    // post surfaces (if needed)
413    handlePageFlip();
414
415    if (mDirtyRegion.isEmpty()) {
416        // nothing new to do.
417        return true;
418    }
419
420    if (UNLIKELY(mHwWorkListDirty)) {
421        // build the h/w work list
422        handleWorkList();
423    }
424
425    const DisplayHardware& hw(graphicPlane(0).displayHardware());
426    if (LIKELY(hw.canDraw())) {
427        // repaint the framebuffer (if needed)
428
429        const int index = hw.getCurrentBufferIndex();
430        GraphicLog& logger(GraphicLog::getInstance());
431
432        logger.log(GraphicLog::SF_REPAINT, index);
433        handleRepaint();
434
435        // inform the h/w that we're done compositing
436        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
437        hw.compositionComplete();
438
439        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
440        postFramebuffer();
441
442        logger.log(GraphicLog::SF_REPAINT_DONE, index);
443    } else {
444        // pretend we did the post
445        hw.compositionComplete();
446        usleep(16667); // 60 fps period
447    }
448    return true;
449}
450
451void SurfaceFlinger::postFramebuffer()
452{
453    // this should never happen. we do the flip anyways so we don't
454    // risk to cause a deadlock with hwc
455    LOGW_IF(mSwapRegion.isEmpty(), "mSwapRegion is empty");
456    const DisplayHardware& hw(graphicPlane(0).displayHardware());
457    const nsecs_t now = systemTime();
458    mDebugInSwapBuffers = now;
459    hw.flip(mSwapRegion);
460    mLastSwapBufferTime = systemTime() - now;
461    mDebugInSwapBuffers = 0;
462    mSwapRegion.clear();
463}
464
465void SurfaceFlinger::handleConsoleEvents()
466{
467    // something to do with the console
468    const DisplayHardware& hw = graphicPlane(0).displayHardware();
469
470    int what = android_atomic_and(0, &mConsoleSignals);
471    if (what & eConsoleAcquired) {
472        hw.acquireScreen();
473        // this is a temporary work-around, eventually this should be called
474        // by the power-manager
475        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
476    }
477
478    if (what & eConsoleReleased) {
479        if (hw.isScreenAcquired()) {
480            hw.releaseScreen();
481        }
482    }
483
484    mDirtyRegion.set(hw.bounds());
485}
486
487void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
488{
489    Mutex::Autolock _l(mStateLock);
490    const nsecs_t now = systemTime();
491    mDebugInTransaction = now;
492
493    // Here we're guaranteed that some transaction flags are set
494    // so we can call handleTransactionLocked() unconditionally.
495    // We call getTransactionFlags(), which will also clear the flags,
496    // with mStateLock held to guarantee that mCurrentState won't change
497    // until the transaction is committed.
498
499    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
500    transactionFlags = getTransactionFlags(mask);
501    handleTransactionLocked(transactionFlags);
502
503    mLastTransactionTime = systemTime() - now;
504    mDebugInTransaction = 0;
505    invalidateHwcGeometry();
506    // here the transaction has been committed
507}
508
509void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
510{
511    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
512    const size_t count = currentLayers.size();
513
514    /*
515     * Traversal of the children
516     * (perform the transaction for each of them if needed)
517     */
518
519    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
520    if (layersNeedTransaction) {
521        for (size_t i=0 ; i<count ; i++) {
522            const sp<LayerBase>& layer = currentLayers[i];
523            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
524            if (!trFlags) continue;
525
526            const uint32_t flags = layer->doTransaction(0);
527            if (flags & Layer::eVisibleRegion)
528                mVisibleRegionsDirty = true;
529        }
530    }
531
532    /*
533     * Perform our own transaction if needed
534     */
535
536    if (transactionFlags & eTransactionNeeded) {
537        if (mCurrentState.orientation != mDrawingState.orientation) {
538            // the orientation has changed, recompute all visible regions
539            // and invalidate everything.
540
541            const int dpy = 0;
542            const int orientation = mCurrentState.orientation;
543            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
544            GraphicPlane& plane(graphicPlane(dpy));
545            plane.setOrientation(orientation);
546
547            // update the shared control block
548            const DisplayHardware& hw(plane.displayHardware());
549            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
550            dcblk->orientation = orientation;
551            dcblk->w = plane.getWidth();
552            dcblk->h = plane.getHeight();
553
554            mVisibleRegionsDirty = true;
555            mDirtyRegion.set(hw.bounds());
556        }
557
558        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
559            // layers have been added
560            mVisibleRegionsDirty = true;
561        }
562
563        // some layers might have been removed, so
564        // we need to update the regions they're exposing.
565        if (mLayersRemoved) {
566            mLayersRemoved = false;
567            mVisibleRegionsDirty = true;
568            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
569            const size_t count = previousLayers.size();
570            for (size_t i=0 ; i<count ; i++) {
571                const sp<LayerBase>& layer(previousLayers[i]);
572                if (currentLayers.indexOf( layer ) < 0) {
573                    // this layer is not visible anymore
574                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
575                }
576            }
577        }
578    }
579
580    commitTransaction();
581}
582
583void SurfaceFlinger::computeVisibleRegions(
584    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
585{
586    const GraphicPlane& plane(graphicPlane(0));
587    const Transform& planeTransform(plane.transform());
588    const DisplayHardware& hw(plane.displayHardware());
589    const Region screenRegion(hw.bounds());
590
591    Region aboveOpaqueLayers;
592    Region aboveCoveredLayers;
593    Region dirty;
594
595    bool secureFrameBuffer = false;
596
597    size_t i = currentLayers.size();
598    while (i--) {
599        const sp<LayerBase>& layer = currentLayers[i];
600        layer->validateVisibility(planeTransform);
601
602        // start with the whole surface at its current location
603        const Layer::State& s(layer->drawingState());
604
605        /*
606         * opaqueRegion: area of a surface that is fully opaque.
607         */
608        Region opaqueRegion;
609
610        /*
611         * visibleRegion: area of a surface that is visible on screen
612         * and not fully transparent. This is essentially the layer's
613         * footprint minus the opaque regions above it.
614         * Areas covered by a translucent surface are considered visible.
615         */
616        Region visibleRegion;
617
618        /*
619         * coveredRegion: area of a surface that is covered by all
620         * visible regions above it (which includes the translucent areas).
621         */
622        Region coveredRegion;
623
624
625        // handle hidden surfaces by setting the visible region to empty
626        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
627            const bool translucent = !layer->isOpaque();
628            const Rect bounds(layer->visibleBounds());
629            visibleRegion.set(bounds);
630            visibleRegion.andSelf(screenRegion);
631            if (!visibleRegion.isEmpty()) {
632                // Remove the transparent area from the visible region
633                if (translucent) {
634                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
635                }
636
637                // compute the opaque region
638                const int32_t layerOrientation = layer->getOrientation();
639                if (s.alpha==255 && !translucent &&
640                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
641                    // the opaque region is the layer's footprint
642                    opaqueRegion = visibleRegion;
643                }
644            }
645        }
646
647        // Clip the covered region to the visible region
648        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
649
650        // Update aboveCoveredLayers for next (lower) layer
651        aboveCoveredLayers.orSelf(visibleRegion);
652
653        // subtract the opaque region covered by the layers above us
654        visibleRegion.subtractSelf(aboveOpaqueLayers);
655
656        // compute this layer's dirty region
657        if (layer->contentDirty) {
658            // we need to invalidate the whole region
659            dirty = visibleRegion;
660            // as well, as the old visible region
661            dirty.orSelf(layer->visibleRegionScreen);
662            layer->contentDirty = false;
663        } else {
664            /* compute the exposed region:
665             *   the exposed region consists of two components:
666             *   1) what's VISIBLE now and was COVERED before
667             *   2) what's EXPOSED now less what was EXPOSED before
668             *
669             * note that (1) is conservative, we start with the whole
670             * visible region but only keep what used to be covered by
671             * something -- which mean it may have been exposed.
672             *
673             * (2) handles areas that were not covered by anything but got
674             * exposed because of a resize.
675             */
676            const Region newExposed = visibleRegion - coveredRegion;
677            const Region oldVisibleRegion = layer->visibleRegionScreen;
678            const Region oldCoveredRegion = layer->coveredRegionScreen;
679            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
680            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
681        }
682        dirty.subtractSelf(aboveOpaqueLayers);
683
684        // accumulate to the screen dirty region
685        dirtyRegion.orSelf(dirty);
686
687        // Update aboveOpaqueLayers for next (lower) layer
688        aboveOpaqueLayers.orSelf(opaqueRegion);
689
690        // Store the visible region is screen space
691        layer->setVisibleRegion(visibleRegion);
692        layer->setCoveredRegion(coveredRegion);
693
694        // If a secure layer is partially visible, lock-down the screen!
695        if (layer->isSecure() && !visibleRegion.isEmpty()) {
696            secureFrameBuffer = true;
697        }
698    }
699
700    // invalidate the areas where a layer was removed
701    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
702    mDirtyRegionRemovedLayer.clear();
703
704    mSecureFrameBuffer = secureFrameBuffer;
705    opaqueRegion = aboveOpaqueLayers;
706}
707
708
709void SurfaceFlinger::commitTransaction()
710{
711    mDrawingState = mCurrentState;
712    mTransationPending = false;
713    mTransactionCV.broadcast();
714}
715
716void SurfaceFlinger::handlePageFlip()
717{
718    bool visibleRegions = mVisibleRegionsDirty;
719    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
720    visibleRegions |= lockPageFlip(currentLayers);
721
722        const DisplayHardware& hw = graphicPlane(0).displayHardware();
723        const Region screenRegion(hw.bounds());
724        if (visibleRegions) {
725            Region opaqueRegion;
726            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
727
728            /*
729             *  rebuild the visible layer list
730             */
731            const size_t count = currentLayers.size();
732            mVisibleLayersSortedByZ.clear();
733            mVisibleLayersSortedByZ.setCapacity(count);
734            for (size_t i=0 ; i<count ; i++) {
735                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
736                    mVisibleLayersSortedByZ.add(currentLayers[i]);
737            }
738
739            mWormholeRegion = screenRegion.subtract(opaqueRegion);
740            mVisibleRegionsDirty = false;
741            invalidateHwcGeometry();
742        }
743
744    unlockPageFlip(currentLayers);
745    mDirtyRegion.andSelf(screenRegion);
746}
747
748void SurfaceFlinger::invalidateHwcGeometry()
749{
750    mHwWorkListDirty = true;
751}
752
753bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
754{
755    bool recomputeVisibleRegions = false;
756    size_t count = currentLayers.size();
757    sp<LayerBase> const* layers = currentLayers.array();
758    for (size_t i=0 ; i<count ; i++) {
759        const sp<LayerBase>& layer(layers[i]);
760        layer->lockPageFlip(recomputeVisibleRegions);
761    }
762    return recomputeVisibleRegions;
763}
764
765void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
766{
767    const GraphicPlane& plane(graphicPlane(0));
768    const Transform& planeTransform(plane.transform());
769    size_t count = currentLayers.size();
770    sp<LayerBase> const* layers = currentLayers.array();
771    for (size_t i=0 ; i<count ; i++) {
772        const sp<LayerBase>& layer(layers[i]);
773        layer->unlockPageFlip(planeTransform, mDirtyRegion);
774    }
775}
776
777void SurfaceFlinger::handleWorkList()
778{
779    mHwWorkListDirty = false;
780    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
781    if (hwc.initCheck() == NO_ERROR) {
782        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
783        const size_t count = currentLayers.size();
784        hwc.createWorkList(count);
785        hwc_layer_t* const cur(hwc.getLayers());
786        for (size_t i=0 ; cur && i<count ; i++) {
787            currentLayers[i]->setGeometry(&cur[i]);
788            if (mDebugDisableHWC || mDebugRegion) {
789                cur[i].compositionType = HWC_FRAMEBUFFER;
790                cur[i].flags |= HWC_SKIP_LAYER;
791            }
792        }
793    }
794}
795
796void SurfaceFlinger::handleRepaint()
797{
798    // compute the invalid region
799    mSwapRegion.orSelf(mDirtyRegion);
800
801    if (UNLIKELY(mDebugRegion)) {
802        debugFlashRegions();
803    }
804
805    // set the frame buffer
806    const DisplayHardware& hw(graphicPlane(0).displayHardware());
807    glMatrixMode(GL_MODELVIEW);
808    glLoadIdentity();
809
810    uint32_t flags = hw.getFlags();
811    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
812        (flags & DisplayHardware::BUFFER_PRESERVED))
813    {
814        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
815        // takes a rectangle, we must make sure to update that whole
816        // rectangle in that case
817        if (flags & DisplayHardware::SWAP_RECTANGLE) {
818            // TODO: we really should be able to pass a region to
819            // SWAP_RECTANGLE so that we don't have to redraw all this.
820            mDirtyRegion.set(mSwapRegion.bounds());
821        } else {
822            // in the BUFFER_PRESERVED case, obviously, we can update only
823            // what's needed and nothing more.
824            // NOTE: this is NOT a common case, as preserving the backbuffer
825            // is costly and usually involves copying the whole update back.
826        }
827    } else {
828        if (flags & DisplayHardware::PARTIAL_UPDATES) {
829            // We need to redraw the rectangle that will be updated
830            // (pushed to the framebuffer).
831            // This is needed because PARTIAL_UPDATES only takes one
832            // rectangle instead of a region (see DisplayHardware::flip())
833            mDirtyRegion.set(mSwapRegion.bounds());
834        } else {
835            // we need to redraw everything (the whole screen)
836            mDirtyRegion.set(hw.bounds());
837            mSwapRegion = mDirtyRegion;
838        }
839    }
840
841    setupHardwareComposer(mDirtyRegion);
842    composeSurfaces(mDirtyRegion);
843
844    // update the swap region and clear the dirty region
845    mSwapRegion.orSelf(mDirtyRegion);
846    mDirtyRegion.clear();
847}
848
849void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
850{
851    const DisplayHardware& hw(graphicPlane(0).displayHardware());
852    HWComposer& hwc(hw.getHwComposer());
853    hwc_layer_t* const cur(hwc.getLayers());
854    if (!cur) {
855        return;
856    }
857
858    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
859    size_t count = layers.size();
860
861    LOGE_IF(hwc.getNumLayers() != count,
862            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
863            hwc.getNumLayers(), count);
864
865    // just to be extra-safe, use the smallest count
866    if (hwc.initCheck() == NO_ERROR) {
867        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
868    }
869
870    /*
871     *  update the per-frame h/w composer data for each layer
872     *  and build the transparent region of the FB
873     */
874    for (size_t i=0 ; i<count ; i++) {
875        const sp<LayerBase>& layer(layers[i]);
876        layer->setPerFrameData(&cur[i]);
877    }
878    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
879    status_t err = hwc.prepare();
880    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
881
882    if (err == NO_ERROR) {
883        // what's happening here is tricky.
884        // we want to clear all the layers with the CLEAR_FB flags
885        // that are opaque.
886        // however, since some GPU are efficient at preserving
887        // the backbuffer, we want to take advantage of that so we do the
888        // clear only in the dirty region (other areas will be preserved
889        // on those GPUs).
890        //   NOTE: on non backbuffer preserving GPU, the dirty region
891        //   has already been expanded as needed, so the code is correct
892        //   there too.
893        //
894        // However, the content of the framebuffer cannot be trusted when
895        // we switch to/from FB/OVERLAY, in which case we need to
896        // expand the dirty region to those areas too.
897        //
898        // Note also that there is a special case when switching from
899        // "no layers in FB" to "some layers in FB", where we need to redraw
900        // the entire FB, since some areas might contain uninitialized
901        // data.
902        //
903        // Also we want to make sure to not clear areas that belong to
904        // layers above that won't redraw (we would just be erasing them),
905        // that is, we can't erase anything outside the dirty region.
906
907        Region transparent;
908
909        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
910            transparent.set(hw.getBounds());
911            dirtyInOut = transparent;
912        } else {
913            for (size_t i=0 ; i<count ; i++) {
914                const sp<LayerBase>& layer(layers[i]);
915                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
916                    transparent.orSelf(layer->visibleRegionScreen);
917                }
918                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
919                if (isOverlay != layer->isOverlay()) {
920                    // we transitioned to/from overlay, so add this layer
921                    // to the dirty region so the framebuffer can be either
922                    // cleared or redrawn.
923                    dirtyInOut.orSelf(layer->visibleRegionScreen);
924                }
925                layer->setOverlay(isOverlay);
926            }
927            // don't erase stuff outside the dirty region
928            transparent.andSelf(dirtyInOut);
929        }
930
931        /*
932         *  clear the area of the FB that need to be transparent
933         */
934        if (!transparent.isEmpty()) {
935            glClearColor(0,0,0,0);
936            Region::const_iterator it = transparent.begin();
937            Region::const_iterator const end = transparent.end();
938            const int32_t height = hw.getHeight();
939            while (it != end) {
940                const Rect& r(*it++);
941                const GLint sy = height - (r.top + r.height());
942                glScissor(r.left, sy, r.width(), r.height());
943                glClear(GL_COLOR_BUFFER_BIT);
944            }
945        }
946    }
947}
948
949void SurfaceFlinger::composeSurfaces(const Region& dirty)
950{
951    const DisplayHardware& hw(graphicPlane(0).displayHardware());
952    HWComposer& hwc(hw.getHwComposer());
953
954    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
955    if (UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
956        // should never happen unless the window manager has a bug
957        // draw something...
958        drawWormhole();
959    }
960
961    /*
962     * and then, render the layers targeted at the framebuffer
963     */
964    hwc_layer_t* const cur(hwc.getLayers());
965    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
966    size_t count = layers.size();
967    for (size_t i=0 ; i<count ; i++) {
968        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
969            continue;
970        }
971        const sp<LayerBase>& layer(layers[i]);
972        const Region clip(dirty.intersect(layer->visibleRegionScreen));
973        if (!clip.isEmpty()) {
974            layer->draw(clip);
975        }
976    }
977}
978
979void SurfaceFlinger::debugFlashRegions()
980{
981    const DisplayHardware& hw(graphicPlane(0).displayHardware());
982    const uint32_t flags = hw.getFlags();
983    const int32_t height = hw.getHeight();
984    if (mSwapRegion.isEmpty()) {
985        return;
986    }
987
988    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
989            (flags & DisplayHardware::BUFFER_PRESERVED))) {
990        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
991                mDirtyRegion.bounds() : hw.bounds());
992        composeSurfaces(repaint);
993    }
994
995    glDisable(GL_TEXTURE_EXTERNAL_OES);
996    glDisable(GL_TEXTURE_2D);
997    glDisable(GL_BLEND);
998    glDisable(GL_SCISSOR_TEST);
999
1000    static int toggle = 0;
1001    toggle = 1 - toggle;
1002    if (toggle) {
1003        glColor4f(1, 0, 1, 1);
1004    } else {
1005        glColor4f(1, 1, 0, 1);
1006    }
1007
1008    Region::const_iterator it = mDirtyRegion.begin();
1009    Region::const_iterator const end = mDirtyRegion.end();
1010    while (it != end) {
1011        const Rect& r = *it++;
1012        GLfloat vertices[][2] = {
1013                { r.left,  height - r.top },
1014                { r.left,  height - r.bottom },
1015                { r.right, height - r.bottom },
1016                { r.right, height - r.top }
1017        };
1018        glVertexPointer(2, GL_FLOAT, 0, vertices);
1019        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1020    }
1021
1022    hw.flip(mSwapRegion);
1023
1024    if (mDebugRegion > 1)
1025        usleep(mDebugRegion * 1000);
1026
1027    glEnable(GL_SCISSOR_TEST);
1028}
1029
1030void SurfaceFlinger::drawWormhole() const
1031{
1032    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1033    if (region.isEmpty())
1034        return;
1035
1036    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1037    const int32_t width = hw.getWidth();
1038    const int32_t height = hw.getHeight();
1039
1040    if (LIKELY(!mDebugBackground)) {
1041        glClearColor(0,0,0,0);
1042        Region::const_iterator it = region.begin();
1043        Region::const_iterator const end = region.end();
1044        while (it != end) {
1045            const Rect& r = *it++;
1046            const GLint sy = height - (r.top + r.height());
1047            glScissor(r.left, sy, r.width(), r.height());
1048            glClear(GL_COLOR_BUFFER_BIT);
1049        }
1050    } else {
1051        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1052                { width, height }, { 0, height }  };
1053        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1054
1055        glVertexPointer(2, GL_SHORT, 0, vertices);
1056        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1057        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1058
1059        glDisable(GL_TEXTURE_EXTERNAL_OES);
1060        glEnable(GL_TEXTURE_2D);
1061        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1062        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1063        glMatrixMode(GL_TEXTURE);
1064        glLoadIdentity();
1065
1066        glDisable(GL_BLEND);
1067
1068        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1069        Region::const_iterator it = region.begin();
1070        Region::const_iterator const end = region.end();
1071        while (it != end) {
1072            const Rect& r = *it++;
1073            const GLint sy = height - (r.top + r.height());
1074            glScissor(r.left, sy, r.width(), r.height());
1075            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1076        }
1077        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1078        glDisable(GL_TEXTURE_2D);
1079        glLoadIdentity();
1080        glMatrixMode(GL_MODELVIEW);
1081    }
1082}
1083
1084void SurfaceFlinger::debugShowFPS() const
1085{
1086    static int mFrameCount;
1087    static int mLastFrameCount = 0;
1088    static nsecs_t mLastFpsTime = 0;
1089    static float mFps = 0;
1090    mFrameCount++;
1091    nsecs_t now = systemTime();
1092    nsecs_t diff = now - mLastFpsTime;
1093    if (diff > ms2ns(250)) {
1094        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1095        mLastFpsTime = now;
1096        mLastFrameCount = mFrameCount;
1097    }
1098    // XXX: mFPS has the value we want
1099 }
1100
1101status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1102{
1103    Mutex::Autolock _l(mStateLock);
1104    addLayer_l(layer);
1105    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1106    return NO_ERROR;
1107}
1108
1109status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1110{
1111    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1112    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1113}
1114
1115ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1116        const sp<LayerBaseClient>& lbc)
1117{
1118    // attach this layer to the client
1119    size_t name = client->attachLayer(lbc);
1120
1121    Mutex::Autolock _l(mStateLock);
1122
1123    // add this layer to the current state list
1124    addLayer_l(lbc);
1125
1126    return ssize_t(name);
1127}
1128
1129status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1130{
1131    Mutex::Autolock _l(mStateLock);
1132    status_t err = purgatorizeLayer_l(layer);
1133    if (err == NO_ERROR)
1134        setTransactionFlags(eTransactionNeeded);
1135    return err;
1136}
1137
1138status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1139{
1140    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1141    if (lbc != 0) {
1142        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1143    }
1144    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1145    if (index >= 0) {
1146        mLayersRemoved = true;
1147        return NO_ERROR;
1148    }
1149    return status_t(index);
1150}
1151
1152status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1153{
1154    // First add the layer to the purgatory list, which makes sure it won't
1155    // go away, then remove it from the main list (through a transaction).
1156    ssize_t err = removeLayer_l(layerBase);
1157    if (err >= 0) {
1158        mLayerPurgatory.add(layerBase);
1159    }
1160
1161    layerBase->onRemoved();
1162
1163    // it's possible that we don't find a layer, because it might
1164    // have been destroyed already -- this is not technically an error
1165    // from the user because there is a race between Client::destroySurface(),
1166    // ~Client() and ~ISurface().
1167    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1168}
1169
1170status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1171{
1172    layer->forceVisibilityTransaction();
1173    setTransactionFlags(eTraversalNeeded);
1174    return NO_ERROR;
1175}
1176
1177uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1178{
1179    return android_atomic_release_load(&mTransactionFlags);
1180}
1181
1182uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1183{
1184    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1185}
1186
1187uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1188{
1189    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1190    if ((old & flags)==0) { // wake the server up
1191        signalEvent();
1192    }
1193    return old;
1194}
1195
1196
1197void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1198        int orientation, uint32_t flags) {
1199    Mutex::Autolock _l(mStateLock);
1200
1201    uint32_t transactionFlags = 0;
1202    if (mCurrentState.orientation != orientation) {
1203        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1204            mCurrentState.orientation = orientation;
1205            transactionFlags |= eTransactionNeeded;
1206        } else if (orientation != eOrientationUnchanged) {
1207            LOGW("setTransactionState: ignoring unrecognized orientation: %d",
1208                    orientation);
1209        }
1210    }
1211
1212    const size_t count = state.size();
1213    for (size_t i=0 ; i<count ; i++) {
1214        const ComposerState& s(state[i]);
1215        sp<Client> client( static_cast<Client *>(s.client.get()) );
1216        transactionFlags |= setClientStateLocked(client, s.state);
1217    }
1218    if (transactionFlags) {
1219        setTransactionFlags(transactionFlags);
1220    }
1221
1222    // if this is a synchronous transaction, wait for it to take effect before
1223    // returning.
1224    if (flags & eSynchronous) {
1225        mTransationPending = true;
1226    }
1227    while (mTransationPending) {
1228        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1229        if (CC_UNLIKELY(err != NO_ERROR)) {
1230            // just in case something goes wrong in SF, return to the
1231            // called after a few seconds.
1232            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1233            mTransationPending = false;
1234            break;
1235        }
1236    }
1237}
1238
1239int SurfaceFlinger::setOrientation(DisplayID dpy,
1240        int orientation, uint32_t flags)
1241{
1242    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1243        return BAD_VALUE;
1244
1245    Mutex::Autolock _l(mStateLock);
1246    if (mCurrentState.orientation != orientation) {
1247        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1248            mCurrentState.orientationFlags = flags;
1249            mCurrentState.orientation = orientation;
1250            setTransactionFlags(eTransactionNeeded);
1251            mTransactionCV.wait(mStateLock);
1252        } else {
1253            orientation = BAD_VALUE;
1254        }
1255    }
1256    return orientation;
1257}
1258
1259sp<ISurface> SurfaceFlinger::createSurface(
1260        ISurfaceComposerClient::surface_data_t* params,
1261        const String8& name,
1262        const sp<Client>& client,
1263        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1264        uint32_t flags)
1265{
1266    sp<LayerBaseClient> layer;
1267    sp<ISurface> surfaceHandle;
1268
1269    if (int32_t(w|h) < 0) {
1270        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1271                int(w), int(h));
1272        return surfaceHandle;
1273    }
1274
1275    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1276    sp<Layer> normalLayer;
1277    switch (flags & eFXSurfaceMask) {
1278        case eFXSurfaceNormal:
1279            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1280            layer = normalLayer;
1281            break;
1282        case eFXSurfaceBlur:
1283            // for now we treat Blur as Dim, until we can implement it
1284            // efficiently.
1285        case eFXSurfaceDim:
1286            layer = createDimSurface(client, d, w, h, flags);
1287            break;
1288        case eFXSurfaceScreenshot:
1289            layer = createScreenshotSurface(client, d, w, h, flags);
1290            break;
1291    }
1292
1293    if (layer != 0) {
1294        layer->initStates(w, h, flags);
1295        layer->setName(name);
1296        ssize_t token = addClientLayer(client, layer);
1297
1298        surfaceHandle = layer->getSurface();
1299        if (surfaceHandle != 0) {
1300            params->token = token;
1301            params->identity = layer->getIdentity();
1302            if (normalLayer != 0) {
1303                Mutex::Autolock _l(mStateLock);
1304                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1305            }
1306        }
1307
1308        setTransactionFlags(eTransactionNeeded);
1309    }
1310
1311    return surfaceHandle;
1312}
1313
1314sp<Layer> SurfaceFlinger::createNormalSurface(
1315        const sp<Client>& client, DisplayID display,
1316        uint32_t w, uint32_t h, uint32_t flags,
1317        PixelFormat& format)
1318{
1319    // initialize the surfaces
1320    switch (format) { // TODO: take h/w into account
1321    case PIXEL_FORMAT_TRANSPARENT:
1322    case PIXEL_FORMAT_TRANSLUCENT:
1323        format = PIXEL_FORMAT_RGBA_8888;
1324        break;
1325    case PIXEL_FORMAT_OPAQUE:
1326#ifdef NO_RGBX_8888
1327        format = PIXEL_FORMAT_RGB_565;
1328#else
1329        format = PIXEL_FORMAT_RGBX_8888;
1330#endif
1331        break;
1332    }
1333
1334#ifdef NO_RGBX_8888
1335    if (format == PIXEL_FORMAT_RGBX_8888)
1336        format = PIXEL_FORMAT_RGBA_8888;
1337#endif
1338
1339    sp<Layer> layer = new Layer(this, display, client);
1340    status_t err = layer->setBuffers(w, h, format, flags);
1341    if (LIKELY(err != NO_ERROR)) {
1342        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1343        layer.clear();
1344    }
1345    return layer;
1346}
1347
1348sp<LayerDim> SurfaceFlinger::createDimSurface(
1349        const sp<Client>& client, DisplayID display,
1350        uint32_t w, uint32_t h, uint32_t flags)
1351{
1352    sp<LayerDim> layer = new LayerDim(this, display, client);
1353    return layer;
1354}
1355
1356sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1357        const sp<Client>& client, DisplayID display,
1358        uint32_t w, uint32_t h, uint32_t flags)
1359{
1360    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1361    status_t err = layer->capture();
1362    if (err != NO_ERROR) {
1363        layer.clear();
1364        LOGW("createScreenshotSurface failed (%s)", strerror(-err));
1365    }
1366    return layer;
1367}
1368
1369status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1370{
1371    /*
1372     * called by the window manager, when a surface should be marked for
1373     * destruction.
1374     *
1375     * The surface is removed from the current and drawing lists, but placed
1376     * in the purgatory queue, so it's not destroyed right-away (we need
1377     * to wait for all client's references to go away first).
1378     */
1379
1380    status_t err = NAME_NOT_FOUND;
1381    Mutex::Autolock _l(mStateLock);
1382    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1383    if (layer != 0) {
1384        err = purgatorizeLayer_l(layer);
1385        if (err == NO_ERROR) {
1386            setTransactionFlags(eTransactionNeeded);
1387        }
1388    }
1389    return err;
1390}
1391
1392status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1393{
1394    // called by ~ISurface() when all references are gone
1395    status_t err = NO_ERROR;
1396    sp<LayerBaseClient> l(layer.promote());
1397    if (l != NULL) {
1398        Mutex::Autolock _l(mStateLock);
1399        err = removeLayer_l(l);
1400        if (err == NAME_NOT_FOUND) {
1401            // The surface wasn't in the current list, which means it was
1402            // removed already, which means it is in the purgatory,
1403            // and need to be removed from there.
1404            ssize_t idx = mLayerPurgatory.remove(l);
1405            LOGE_IF(idx < 0,
1406                    "layer=%p is not in the purgatory list", l.get());
1407        }
1408        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1409                "error removing layer=%p (%s)", l.get(), strerror(-err));
1410    }
1411    return err;
1412}
1413
1414uint32_t SurfaceFlinger::setClientStateLocked(
1415        const sp<Client>& client,
1416        const layer_state_t& s)
1417{
1418    uint32_t flags = 0;
1419    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1420    if (layer != 0) {
1421        const uint32_t what = s.what;
1422        if (what & ePositionChanged) {
1423            if (layer->setPosition(s.x, s.y))
1424                flags |= eTraversalNeeded;
1425        }
1426        if (what & eLayerChanged) {
1427            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1428            if (layer->setLayer(s.z)) {
1429                mCurrentState.layersSortedByZ.removeAt(idx);
1430                mCurrentState.layersSortedByZ.add(layer);
1431                // we need traversal (state changed)
1432                // AND transaction (list changed)
1433                flags |= eTransactionNeeded|eTraversalNeeded;
1434            }
1435        }
1436        if (what & eSizeChanged) {
1437            if (layer->setSize(s.w, s.h)) {
1438                flags |= eTraversalNeeded;
1439            }
1440        }
1441        if (what & eAlphaChanged) {
1442            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1443                flags |= eTraversalNeeded;
1444        }
1445        if (what & eMatrixChanged) {
1446            if (layer->setMatrix(s.matrix))
1447                flags |= eTraversalNeeded;
1448        }
1449        if (what & eTransparentRegionChanged) {
1450            if (layer->setTransparentRegionHint(s.transparentRegion))
1451                flags |= eTraversalNeeded;
1452        }
1453        if (what & eVisibilityChanged) {
1454            if (layer->setFlags(s.flags, s.mask))
1455                flags |= eTraversalNeeded;
1456        }
1457    }
1458    return flags;
1459}
1460
1461void SurfaceFlinger::screenReleased(int dpy)
1462{
1463    // this may be called by a signal handler, we can't do too much in here
1464    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1465    signalEvent();
1466}
1467
1468void SurfaceFlinger::screenAcquired(int dpy)
1469{
1470    // this may be called by a signal handler, we can't do too much in here
1471    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1472    signalEvent();
1473}
1474
1475status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1476{
1477    const size_t SIZE = 4096;
1478    char buffer[SIZE];
1479    String8 result;
1480
1481    if (!PermissionCache::checkCallingPermission(sDump)) {
1482        snprintf(buffer, SIZE, "Permission Denial: "
1483                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1484                IPCThreadState::self()->getCallingPid(),
1485                IPCThreadState::self()->getCallingUid());
1486        result.append(buffer);
1487    } else {
1488
1489        // figure out if we're stuck somewhere
1490        const nsecs_t now = systemTime();
1491        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1492        const nsecs_t inTransaction(mDebugInTransaction);
1493        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1494        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1495
1496        // Try to get the main lock, but don't insist if we can't
1497        // (this would indicate SF is stuck, but we want to be able to
1498        // print something in dumpsys).
1499        int retry = 3;
1500        while (mStateLock.tryLock()<0 && --retry>=0) {
1501            usleep(1000000);
1502        }
1503        const bool locked(retry >= 0);
1504        if (!locked) {
1505            snprintf(buffer, SIZE,
1506                    "SurfaceFlinger appears to be unresponsive, "
1507                    "dumping anyways (no locks held)\n");
1508            result.append(buffer);
1509        }
1510
1511        /*
1512         * Dump the visible layer list
1513         */
1514        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1515        const size_t count = currentLayers.size();
1516        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1517        result.append(buffer);
1518        for (size_t i=0 ; i<count ; i++) {
1519            const sp<LayerBase>& layer(currentLayers[i]);
1520            layer->dump(result, buffer, SIZE);
1521            const Layer::State& s(layer->drawingState());
1522            s.transparentRegion.dump(result, "transparentRegion");
1523            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1524            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1525        }
1526
1527        /*
1528         * Dump the layers in the purgatory
1529         */
1530
1531        const size_t purgatorySize =  mLayerPurgatory.size();
1532        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1533        result.append(buffer);
1534        for (size_t i=0 ; i<purgatorySize ; i++) {
1535            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1536            layer->shortDump(result, buffer, SIZE);
1537        }
1538
1539        /*
1540         * Dump SurfaceFlinger global state
1541         */
1542
1543        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1544        result.append(buffer);
1545
1546        const GLExtensions& extensions(GLExtensions::getInstance());
1547        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1548                extensions.getVendor(),
1549                extensions.getRenderer(),
1550                extensions.getVersion());
1551        result.append(buffer);
1552        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1553        result.append(buffer);
1554
1555        mWormholeRegion.dump(result, "WormholeRegion");
1556        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1557        snprintf(buffer, SIZE,
1558                "  orientation=%d, canDraw=%d\n",
1559                mCurrentState.orientation, hw.canDraw());
1560        result.append(buffer);
1561        snprintf(buffer, SIZE,
1562                "  last eglSwapBuffers() time: %f us\n"
1563                "  last transaction time     : %f us\n",
1564                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1565        result.append(buffer);
1566
1567        if (inSwapBuffersDuration || !locked) {
1568            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1569                    inSwapBuffersDuration/1000.0);
1570            result.append(buffer);
1571        }
1572
1573        if (inTransactionDuration || !locked) {
1574            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1575                    inTransactionDuration/1000.0);
1576            result.append(buffer);
1577        }
1578
1579        /*
1580         * Dump HWComposer state
1581         */
1582        HWComposer& hwc(hw.getHwComposer());
1583        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1584                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1585                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1586        result.append(buffer);
1587        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1588
1589        /*
1590         * Dump gralloc state
1591         */
1592        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1593        alloc.dump(result);
1594        hw.dump(result);
1595
1596        if (locked) {
1597            mStateLock.unlock();
1598        }
1599    }
1600    write(fd, result.string(), result.size());
1601    return NO_ERROR;
1602}
1603
1604status_t SurfaceFlinger::onTransact(
1605    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1606{
1607    switch (code) {
1608        case CREATE_CONNECTION:
1609        case SET_TRANSACTION_STATE:
1610        case SET_ORIENTATION:
1611        case BOOT_FINISHED:
1612        case TURN_ELECTRON_BEAM_OFF:
1613        case TURN_ELECTRON_BEAM_ON:
1614        {
1615            // codes that require permission check
1616            IPCThreadState* ipc = IPCThreadState::self();
1617            const int pid = ipc->getCallingPid();
1618            const int uid = ipc->getCallingUid();
1619            if ((uid != AID_GRAPHICS) &&
1620                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1621                LOGE("Permission Denial: "
1622                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1623                return PERMISSION_DENIED;
1624            }
1625            break;
1626        }
1627        case CAPTURE_SCREEN:
1628        {
1629            // codes that require permission check
1630            IPCThreadState* ipc = IPCThreadState::self();
1631            const int pid = ipc->getCallingPid();
1632            const int uid = ipc->getCallingUid();
1633            if ((uid != AID_GRAPHICS) &&
1634                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1635                LOGE("Permission Denial: "
1636                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1637                return PERMISSION_DENIED;
1638            }
1639            break;
1640        }
1641    }
1642
1643    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1644    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1645        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1646        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1647            IPCThreadState* ipc = IPCThreadState::self();
1648            const int pid = ipc->getCallingPid();
1649            const int uid = ipc->getCallingUid();
1650            LOGE("Permission Denial: "
1651                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1652            return PERMISSION_DENIED;
1653        }
1654        int n;
1655        switch (code) {
1656            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1657            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1658                return NO_ERROR;
1659            case 1002:  // SHOW_UPDATES
1660                n = data.readInt32();
1661                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1662                invalidateHwcGeometry();
1663                repaintEverything();
1664                return NO_ERROR;
1665            case 1003:  // SHOW_BACKGROUND
1666                n = data.readInt32();
1667                mDebugBackground = n ? 1 : 0;
1668                return NO_ERROR;
1669            case 1004:{ // repaint everything
1670                repaintEverything();
1671                return NO_ERROR;
1672            }
1673            case 1005:{ // force transaction
1674                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1675                return NO_ERROR;
1676            }
1677            case 1006:{ // enable/disable GraphicLog
1678                int enabled = data.readInt32();
1679                GraphicLog::getInstance().setEnabled(enabled);
1680                return NO_ERROR;
1681            }
1682            case 1008:  // toggle use of hw composer
1683                n = data.readInt32();
1684                mDebugDisableHWC = n ? 1 : 0;
1685                invalidateHwcGeometry();
1686                repaintEverything();
1687                return NO_ERROR;
1688            case 1009:  // toggle use of transform hint
1689                n = data.readInt32();
1690                mDebugDisableTransformHint = n ? 1 : 0;
1691                invalidateHwcGeometry();
1692                repaintEverything();
1693                return NO_ERROR;
1694            case 1010:  // interrogate.
1695                reply->writeInt32(0);
1696                reply->writeInt32(0);
1697                reply->writeInt32(mDebugRegion);
1698                reply->writeInt32(mDebugBackground);
1699                return NO_ERROR;
1700            case 1013: {
1701                Mutex::Autolock _l(mStateLock);
1702                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1703                reply->writeInt32(hw.getPageFlipCount());
1704            }
1705            return NO_ERROR;
1706        }
1707    }
1708    return err;
1709}
1710
1711void SurfaceFlinger::repaintEverything() {
1712    Mutex::Autolock _l(mStateLock);
1713    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1714    mDirtyRegion.set(hw.bounds());
1715    signalEvent();
1716}
1717
1718// ---------------------------------------------------------------------------
1719
1720status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1721        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1722{
1723    Mutex::Autolock _l(mStateLock);
1724    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1725}
1726
1727status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1728        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1729{
1730    if (!GLExtensions::getInstance().haveFramebufferObject())
1731        return INVALID_OPERATION;
1732
1733    // get screen geometry
1734    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1735    const uint32_t hw_w = hw.getWidth();
1736    const uint32_t hw_h = hw.getHeight();
1737    GLfloat u = 1;
1738    GLfloat v = 1;
1739
1740    // make sure to clear all GL error flags
1741    while ( glGetError() != GL_NO_ERROR ) ;
1742
1743    // create a FBO
1744    GLuint name, tname;
1745    glGenTextures(1, &tname);
1746    glBindTexture(GL_TEXTURE_2D, tname);
1747    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1748            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1749    if (glGetError() != GL_NO_ERROR) {
1750        while ( glGetError() != GL_NO_ERROR ) ;
1751        GLint tw = (2 << (31 - clz(hw_w)));
1752        GLint th = (2 << (31 - clz(hw_h)));
1753        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1754                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1755        u = GLfloat(hw_w) / tw;
1756        v = GLfloat(hw_h) / th;
1757    }
1758    glGenFramebuffersOES(1, &name);
1759    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1760    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1761            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1762
1763    // redraw the screen entirely...
1764    glDisable(GL_TEXTURE_EXTERNAL_OES);
1765    glDisable(GL_TEXTURE_2D);
1766    glClearColor(0,0,0,1);
1767    glClear(GL_COLOR_BUFFER_BIT);
1768    glMatrixMode(GL_MODELVIEW);
1769    glLoadIdentity();
1770    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1771    const size_t count = layers.size();
1772    for (size_t i=0 ; i<count ; ++i) {
1773        const sp<LayerBase>& layer(layers[i]);
1774        layer->drawForSreenShot();
1775    }
1776
1777    hw.compositionComplete();
1778
1779    // back to main framebuffer
1780    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1781    glDisable(GL_SCISSOR_TEST);
1782    glDeleteFramebuffersOES(1, &name);
1783
1784    *textureName = tname;
1785    *uOut = u;
1786    *vOut = v;
1787    return NO_ERROR;
1788}
1789
1790// ---------------------------------------------------------------------------
1791
1792status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1793{
1794    // get screen geometry
1795    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1796    const uint32_t hw_w = hw.getWidth();
1797    const uint32_t hw_h = hw.getHeight();
1798    const Region screenBounds(hw.getBounds());
1799
1800    GLfloat u, v;
1801    GLuint tname;
1802    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1803    if (result != NO_ERROR) {
1804        return result;
1805    }
1806
1807    GLfloat vtx[8];
1808    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1809    glBindTexture(GL_TEXTURE_2D, tname);
1810    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1811    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1812    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1813    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1814    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1815    glVertexPointer(2, GL_FLOAT, 0, vtx);
1816
1817    /*
1818     * Texture coordinate mapping
1819     *
1820     *                 u
1821     *    1 +----------+---+
1822     *      |     |    |   |  image is inverted
1823     *      |     V    |   |  w.r.t. the texture
1824     *  1-v +----------+   |  coordinates
1825     *      |              |
1826     *      |              |
1827     *      |              |
1828     *    0 +--------------+
1829     *      0              1
1830     *
1831     */
1832
1833    class s_curve_interpolator {
1834        const float nbFrames, s, v;
1835    public:
1836        s_curve_interpolator(int nbFrames, float s)
1837        : nbFrames(1.0f / (nbFrames-1)), s(s),
1838          v(1.0f + expf(-s + 0.5f*s)) {
1839        }
1840        float operator()(int f) {
1841            const float x = f * nbFrames;
1842            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1843        }
1844    };
1845
1846    class v_stretch {
1847        const GLfloat hw_w, hw_h;
1848    public:
1849        v_stretch(uint32_t hw_w, uint32_t hw_h)
1850        : hw_w(hw_w), hw_h(hw_h) {
1851        }
1852        void operator()(GLfloat* vtx, float v) {
1853            const GLfloat w = hw_w + (hw_w * v);
1854            const GLfloat h = hw_h - (hw_h * v);
1855            const GLfloat x = (hw_w - w) * 0.5f;
1856            const GLfloat y = (hw_h - h) * 0.5f;
1857            vtx[0] = x;         vtx[1] = y;
1858            vtx[2] = x;         vtx[3] = y + h;
1859            vtx[4] = x + w;     vtx[5] = y + h;
1860            vtx[6] = x + w;     vtx[7] = y;
1861        }
1862    };
1863
1864    class h_stretch {
1865        const GLfloat hw_w, hw_h;
1866    public:
1867        h_stretch(uint32_t hw_w, uint32_t hw_h)
1868        : hw_w(hw_w), hw_h(hw_h) {
1869        }
1870        void operator()(GLfloat* vtx, float v) {
1871            const GLfloat w = hw_w - (hw_w * v);
1872            const GLfloat h = 1.0f;
1873            const GLfloat x = (hw_w - w) * 0.5f;
1874            const GLfloat y = (hw_h - h) * 0.5f;
1875            vtx[0] = x;         vtx[1] = y;
1876            vtx[2] = x;         vtx[3] = y + h;
1877            vtx[4] = x + w;     vtx[5] = y + h;
1878            vtx[6] = x + w;     vtx[7] = y;
1879        }
1880    };
1881
1882    // the full animation is 24 frames
1883    char value[PROPERTY_VALUE_MAX];
1884    property_get("debug.sf.electron_frames", value, "24");
1885    int nbFrames = (atoi(value) + 1) >> 1;
1886    if (nbFrames <= 0) // just in case
1887        nbFrames = 24;
1888
1889    s_curve_interpolator itr(nbFrames, 7.5f);
1890    s_curve_interpolator itg(nbFrames, 8.0f);
1891    s_curve_interpolator itb(nbFrames, 8.5f);
1892
1893    v_stretch vverts(hw_w, hw_h);
1894
1895    glMatrixMode(GL_TEXTURE);
1896    glLoadIdentity();
1897    glMatrixMode(GL_MODELVIEW);
1898    glLoadIdentity();
1899
1900    glEnable(GL_BLEND);
1901    glBlendFunc(GL_ONE, GL_ONE);
1902    for (int i=0 ; i<nbFrames ; i++) {
1903        float x, y, w, h;
1904        const float vr = itr(i);
1905        const float vg = itg(i);
1906        const float vb = itb(i);
1907
1908        // clear screen
1909        glColorMask(1,1,1,1);
1910        glClear(GL_COLOR_BUFFER_BIT);
1911        glEnable(GL_TEXTURE_2D);
1912
1913        // draw the red plane
1914        vverts(vtx, vr);
1915        glColorMask(1,0,0,1);
1916        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1917
1918        // draw the green plane
1919        vverts(vtx, vg);
1920        glColorMask(0,1,0,1);
1921        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1922
1923        // draw the blue plane
1924        vverts(vtx, vb);
1925        glColorMask(0,0,1,1);
1926        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1927
1928        // draw the white highlight (we use the last vertices)
1929        glDisable(GL_TEXTURE_2D);
1930        glColorMask(1,1,1,1);
1931        glColor4f(vg, vg, vg, 1);
1932        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1933        hw.flip(screenBounds);
1934    }
1935
1936    h_stretch hverts(hw_w, hw_h);
1937    glDisable(GL_BLEND);
1938    glDisable(GL_TEXTURE_2D);
1939    glColorMask(1,1,1,1);
1940    for (int i=0 ; i<nbFrames ; i++) {
1941        const float v = itg(i);
1942        hverts(vtx, v);
1943        glClear(GL_COLOR_BUFFER_BIT);
1944        glColor4f(1-v, 1-v, 1-v, 1);
1945        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1946        hw.flip(screenBounds);
1947    }
1948
1949    glColorMask(1,1,1,1);
1950    glEnable(GL_SCISSOR_TEST);
1951    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1952    glDeleteTextures(1, &tname);
1953    glDisable(GL_TEXTURE_2D);
1954    glDisable(GL_BLEND);
1955    return NO_ERROR;
1956}
1957
1958status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1959{
1960    status_t result = PERMISSION_DENIED;
1961
1962    if (!GLExtensions::getInstance().haveFramebufferObject())
1963        return INVALID_OPERATION;
1964
1965
1966    // get screen geometry
1967    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1968    const uint32_t hw_w = hw.getWidth();
1969    const uint32_t hw_h = hw.getHeight();
1970    const Region screenBounds(hw.bounds());
1971
1972    GLfloat u, v;
1973    GLuint tname;
1974    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1975    if (result != NO_ERROR) {
1976        return result;
1977    }
1978
1979    GLfloat vtx[8];
1980    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1981    glBindTexture(GL_TEXTURE_2D, tname);
1982    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1983    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1984    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1985    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1986    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1987    glVertexPointer(2, GL_FLOAT, 0, vtx);
1988
1989    class s_curve_interpolator {
1990        const float nbFrames, s, v;
1991    public:
1992        s_curve_interpolator(int nbFrames, float s)
1993        : nbFrames(1.0f / (nbFrames-1)), s(s),
1994          v(1.0f + expf(-s + 0.5f*s)) {
1995        }
1996        float operator()(int f) {
1997            const float x = f * nbFrames;
1998            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1999        }
2000    };
2001
2002    class v_stretch {
2003        const GLfloat hw_w, hw_h;
2004    public:
2005        v_stretch(uint32_t hw_w, uint32_t hw_h)
2006        : hw_w(hw_w), hw_h(hw_h) {
2007        }
2008        void operator()(GLfloat* vtx, float v) {
2009            const GLfloat w = hw_w + (hw_w * v);
2010            const GLfloat h = hw_h - (hw_h * v);
2011            const GLfloat x = (hw_w - w) * 0.5f;
2012            const GLfloat y = (hw_h - h) * 0.5f;
2013            vtx[0] = x;         vtx[1] = y;
2014            vtx[2] = x;         vtx[3] = y + h;
2015            vtx[4] = x + w;     vtx[5] = y + h;
2016            vtx[6] = x + w;     vtx[7] = y;
2017        }
2018    };
2019
2020    class h_stretch {
2021        const GLfloat hw_w, hw_h;
2022    public:
2023        h_stretch(uint32_t hw_w, uint32_t hw_h)
2024        : hw_w(hw_w), hw_h(hw_h) {
2025        }
2026        void operator()(GLfloat* vtx, float v) {
2027            const GLfloat w = hw_w - (hw_w * v);
2028            const GLfloat h = 1.0f;
2029            const GLfloat x = (hw_w - w) * 0.5f;
2030            const GLfloat y = (hw_h - h) * 0.5f;
2031            vtx[0] = x;         vtx[1] = y;
2032            vtx[2] = x;         vtx[3] = y + h;
2033            vtx[4] = x + w;     vtx[5] = y + h;
2034            vtx[6] = x + w;     vtx[7] = y;
2035        }
2036    };
2037
2038    // the full animation is 12 frames
2039    int nbFrames = 8;
2040    s_curve_interpolator itr(nbFrames, 7.5f);
2041    s_curve_interpolator itg(nbFrames, 8.0f);
2042    s_curve_interpolator itb(nbFrames, 8.5f);
2043
2044    h_stretch hverts(hw_w, hw_h);
2045    glDisable(GL_BLEND);
2046    glDisable(GL_TEXTURE_2D);
2047    glColorMask(1,1,1,1);
2048    for (int i=nbFrames-1 ; i>=0 ; i--) {
2049        const float v = itg(i);
2050        hverts(vtx, v);
2051        glClear(GL_COLOR_BUFFER_BIT);
2052        glColor4f(1-v, 1-v, 1-v, 1);
2053        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2054        hw.flip(screenBounds);
2055    }
2056
2057    nbFrames = 4;
2058    v_stretch vverts(hw_w, hw_h);
2059    glEnable(GL_BLEND);
2060    glBlendFunc(GL_ONE, GL_ONE);
2061    for (int i=nbFrames-1 ; i>=0 ; i--) {
2062        float x, y, w, h;
2063        const float vr = itr(i);
2064        const float vg = itg(i);
2065        const float vb = itb(i);
2066
2067        // clear screen
2068        glColorMask(1,1,1,1);
2069        glClear(GL_COLOR_BUFFER_BIT);
2070        glEnable(GL_TEXTURE_2D);
2071
2072        // draw the red plane
2073        vverts(vtx, vr);
2074        glColorMask(1,0,0,1);
2075        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2076
2077        // draw the green plane
2078        vverts(vtx, vg);
2079        glColorMask(0,1,0,1);
2080        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2081
2082        // draw the blue plane
2083        vverts(vtx, vb);
2084        glColorMask(0,0,1,1);
2085        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2086
2087        hw.flip(screenBounds);
2088    }
2089
2090    glColorMask(1,1,1,1);
2091    glEnable(GL_SCISSOR_TEST);
2092    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2093    glDeleteTextures(1, &tname);
2094    glDisable(GL_TEXTURE_2D);
2095    glDisable(GL_BLEND);
2096
2097    return NO_ERROR;
2098}
2099
2100// ---------------------------------------------------------------------------
2101
2102status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2103{
2104    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2105    if (!hw.canDraw()) {
2106        // we're already off
2107        return NO_ERROR;
2108    }
2109
2110    // turn off hwc while we're doing the animation
2111    hw.getHwComposer().disable();
2112    // and make sure to turn it back on (if needed) next time we compose
2113    invalidateHwcGeometry();
2114
2115    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2116        electronBeamOffAnimationImplLocked();
2117    }
2118
2119    // always clear the whole screen at the end of the animation
2120    glClearColor(0,0,0,1);
2121    glDisable(GL_SCISSOR_TEST);
2122    glClear(GL_COLOR_BUFFER_BIT);
2123    glEnable(GL_SCISSOR_TEST);
2124    hw.flip( Region(hw.bounds()) );
2125
2126    return NO_ERROR;
2127}
2128
2129status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2130{
2131    class MessageTurnElectronBeamOff : public MessageBase {
2132        SurfaceFlinger* flinger;
2133        int32_t mode;
2134        status_t result;
2135    public:
2136        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2137            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2138        }
2139        status_t getResult() const {
2140            return result;
2141        }
2142        virtual bool handler() {
2143            Mutex::Autolock _l(flinger->mStateLock);
2144            result = flinger->turnElectronBeamOffImplLocked(mode);
2145            return true;
2146        }
2147    };
2148
2149    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2150    status_t res = postMessageSync(msg);
2151    if (res == NO_ERROR) {
2152        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2153
2154        // work-around: when the power-manager calls us we activate the
2155        // animation. eventually, the "on" animation will be called
2156        // by the power-manager itself
2157        mElectronBeamAnimationMode = mode;
2158    }
2159    return res;
2160}
2161
2162// ---------------------------------------------------------------------------
2163
2164status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2165{
2166    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2167    if (hw.canDraw()) {
2168        // we're already on
2169        return NO_ERROR;
2170    }
2171    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2172        electronBeamOnAnimationImplLocked();
2173    }
2174
2175    // make sure to redraw the whole screen when the animation is done
2176    mDirtyRegion.set(hw.bounds());
2177    signalEvent();
2178
2179    return NO_ERROR;
2180}
2181
2182status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2183{
2184    class MessageTurnElectronBeamOn : public MessageBase {
2185        SurfaceFlinger* flinger;
2186        int32_t mode;
2187        status_t result;
2188    public:
2189        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2190            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2191        }
2192        status_t getResult() const {
2193            return result;
2194        }
2195        virtual bool handler() {
2196            Mutex::Autolock _l(flinger->mStateLock);
2197            result = flinger->turnElectronBeamOnImplLocked(mode);
2198            return true;
2199        }
2200    };
2201
2202    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2203    return NO_ERROR;
2204}
2205
2206// ---------------------------------------------------------------------------
2207
2208status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2209        sp<IMemoryHeap>* heap,
2210        uint32_t* w, uint32_t* h, PixelFormat* f,
2211        uint32_t sw, uint32_t sh,
2212        uint32_t minLayerZ, uint32_t maxLayerZ)
2213{
2214    status_t result = PERMISSION_DENIED;
2215
2216    // only one display supported for now
2217    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2218        return BAD_VALUE;
2219
2220    if (!GLExtensions::getInstance().haveFramebufferObject())
2221        return INVALID_OPERATION;
2222
2223    // get screen geometry
2224    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2225    const uint32_t hw_w = hw.getWidth();
2226    const uint32_t hw_h = hw.getHeight();
2227
2228    if ((sw > hw_w) || (sh > hw_h))
2229        return BAD_VALUE;
2230
2231    sw = (!sw) ? hw_w : sw;
2232    sh = (!sh) ? hw_h : sh;
2233    const size_t size = sw * sh * 4;
2234
2235    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2236    //        sw, sh, minLayerZ, maxLayerZ);
2237
2238    // make sure to clear all GL error flags
2239    while ( glGetError() != GL_NO_ERROR ) ;
2240
2241    // create a FBO
2242    GLuint name, tname;
2243    glGenRenderbuffersOES(1, &tname);
2244    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2245    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2246    glGenFramebuffersOES(1, &name);
2247    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2248    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2249            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2250
2251    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2252
2253    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2254
2255        // invert everything, b/c glReadPixel() below will invert the FB
2256        glViewport(0, 0, sw, sh);
2257        glScissor(0, 0, sw, sh);
2258        glEnable(GL_SCISSOR_TEST);
2259        glMatrixMode(GL_PROJECTION);
2260        glPushMatrix();
2261        glLoadIdentity();
2262        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2263        glMatrixMode(GL_MODELVIEW);
2264
2265        // redraw the screen entirely...
2266        glClearColor(0,0,0,1);
2267        glClear(GL_COLOR_BUFFER_BIT);
2268
2269        const LayerVector& layers(mDrawingState.layersSortedByZ);
2270        const size_t count = layers.size();
2271        for (size_t i=0 ; i<count ; ++i) {
2272            const sp<LayerBase>& layer(layers[i]);
2273            const uint32_t flags = layer->drawingState().flags;
2274            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2275                const uint32_t z = layer->drawingState().z;
2276                if (z >= minLayerZ && z <= maxLayerZ) {
2277                    layer->drawForSreenShot();
2278                }
2279            }
2280        }
2281
2282        // XXX: this is needed on tegra
2283        glEnable(GL_SCISSOR_TEST);
2284        glScissor(0, 0, sw, sh);
2285
2286        // check for errors and return screen capture
2287        if (glGetError() != GL_NO_ERROR) {
2288            // error while rendering
2289            result = INVALID_OPERATION;
2290        } else {
2291            // allocate shared memory large enough to hold the
2292            // screen capture
2293            sp<MemoryHeapBase> base(
2294                    new MemoryHeapBase(size, 0, "screen-capture") );
2295            void* const ptr = base->getBase();
2296            if (ptr) {
2297                // capture the screen with glReadPixels()
2298                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2299                if (glGetError() == GL_NO_ERROR) {
2300                    *heap = base;
2301                    *w = sw;
2302                    *h = sh;
2303                    *f = PIXEL_FORMAT_RGBA_8888;
2304                    result = NO_ERROR;
2305                }
2306            } else {
2307                result = NO_MEMORY;
2308            }
2309        }
2310        glEnable(GL_SCISSOR_TEST);
2311        glViewport(0, 0, hw_w, hw_h);
2312        glMatrixMode(GL_PROJECTION);
2313        glPopMatrix();
2314        glMatrixMode(GL_MODELVIEW);
2315    } else {
2316        result = BAD_VALUE;
2317    }
2318
2319    // release FBO resources
2320    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2321    glDeleteRenderbuffersOES(1, &tname);
2322    glDeleteFramebuffersOES(1, &name);
2323
2324    hw.compositionComplete();
2325
2326    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2327
2328    return result;
2329}
2330
2331
2332status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2333        sp<IMemoryHeap>* heap,
2334        uint32_t* width, uint32_t* height, PixelFormat* format,
2335        uint32_t sw, uint32_t sh,
2336        uint32_t minLayerZ, uint32_t maxLayerZ)
2337{
2338    // only one display supported for now
2339    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2340        return BAD_VALUE;
2341
2342    if (!GLExtensions::getInstance().haveFramebufferObject())
2343        return INVALID_OPERATION;
2344
2345    class MessageCaptureScreen : public MessageBase {
2346        SurfaceFlinger* flinger;
2347        DisplayID dpy;
2348        sp<IMemoryHeap>* heap;
2349        uint32_t* w;
2350        uint32_t* h;
2351        PixelFormat* f;
2352        uint32_t sw;
2353        uint32_t sh;
2354        uint32_t minLayerZ;
2355        uint32_t maxLayerZ;
2356        status_t result;
2357    public:
2358        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2359                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2360                uint32_t sw, uint32_t sh,
2361                uint32_t minLayerZ, uint32_t maxLayerZ)
2362            : flinger(flinger), dpy(dpy),
2363              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2364              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2365              result(PERMISSION_DENIED)
2366        {
2367        }
2368        status_t getResult() const {
2369            return result;
2370        }
2371        virtual bool handler() {
2372            Mutex::Autolock _l(flinger->mStateLock);
2373
2374            // if we have secure windows, never allow the screen capture
2375            if (flinger->mSecureFrameBuffer)
2376                return true;
2377
2378            result = flinger->captureScreenImplLocked(dpy,
2379                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2380
2381            return true;
2382        }
2383    };
2384
2385    sp<MessageBase> msg = new MessageCaptureScreen(this,
2386            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2387    status_t res = postMessageSync(msg);
2388    if (res == NO_ERROR) {
2389        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2390    }
2391    return res;
2392}
2393
2394// ---------------------------------------------------------------------------
2395
2396sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2397{
2398    sp<Layer> result;
2399    Mutex::Autolock _l(mStateLock);
2400    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2401    return result;
2402}
2403
2404// ---------------------------------------------------------------------------
2405
2406Client::Client(const sp<SurfaceFlinger>& flinger)
2407    : mFlinger(flinger), mNameGenerator(1)
2408{
2409}
2410
2411Client::~Client()
2412{
2413    const size_t count = mLayers.size();
2414    for (size_t i=0 ; i<count ; i++) {
2415        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2416        if (layer != 0) {
2417            mFlinger->removeLayer(layer);
2418        }
2419    }
2420}
2421
2422status_t Client::initCheck() const {
2423    return NO_ERROR;
2424}
2425
2426size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2427{
2428    Mutex::Autolock _l(mLock);
2429    size_t name = mNameGenerator++;
2430    mLayers.add(name, layer);
2431    return name;
2432}
2433
2434void Client::detachLayer(const LayerBaseClient* layer)
2435{
2436    Mutex::Autolock _l(mLock);
2437    // we do a linear search here, because this doesn't happen often
2438    const size_t count = mLayers.size();
2439    for (size_t i=0 ; i<count ; i++) {
2440        if (mLayers.valueAt(i) == layer) {
2441            mLayers.removeItemsAt(i, 1);
2442            break;
2443        }
2444    }
2445}
2446sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2447{
2448    Mutex::Autolock _l(mLock);
2449    sp<LayerBaseClient> lbc;
2450    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2451    if (layer != 0) {
2452        lbc = layer.promote();
2453        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2454    }
2455    return lbc;
2456}
2457
2458
2459status_t Client::onTransact(
2460    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2461{
2462    // these must be checked
2463     IPCThreadState* ipc = IPCThreadState::self();
2464     const int pid = ipc->getCallingPid();
2465     const int uid = ipc->getCallingUid();
2466     const int self_pid = getpid();
2467     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2468         // we're called from a different process, do the real check
2469         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2470         {
2471             LOGE("Permission Denial: "
2472                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2473             return PERMISSION_DENIED;
2474         }
2475     }
2476     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2477}
2478
2479
2480sp<ISurface> Client::createSurface(
2481        ISurfaceComposerClient::surface_data_t* params,
2482        const String8& name,
2483        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2484        uint32_t flags)
2485{
2486    /*
2487     * createSurface must be called from the GL thread so that it can
2488     * have access to the GL context.
2489     */
2490
2491    class MessageCreateSurface : public MessageBase {
2492        sp<ISurface> result;
2493        SurfaceFlinger* flinger;
2494        ISurfaceComposerClient::surface_data_t* params;
2495        Client* client;
2496        const String8& name;
2497        DisplayID display;
2498        uint32_t w, h;
2499        PixelFormat format;
2500        uint32_t flags;
2501    public:
2502        MessageCreateSurface(SurfaceFlinger* flinger,
2503                ISurfaceComposerClient::surface_data_t* params,
2504                const String8& name, Client* client,
2505                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2506                uint32_t flags)
2507            : flinger(flinger), params(params), client(client), name(name),
2508              display(display), w(w), h(h), format(format), flags(flags)
2509        {
2510        }
2511        sp<ISurface> getResult() const { return result; }
2512        virtual bool handler() {
2513            result = flinger->createSurface(params, name, client,
2514                    display, w, h, format, flags);
2515            return true;
2516        }
2517    };
2518
2519    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2520            params, name, this, display, w, h, format, flags);
2521    mFlinger->postMessageSync(msg);
2522    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2523}
2524status_t Client::destroySurface(SurfaceID sid) {
2525    return mFlinger->removeSurface(this, sid);
2526}
2527
2528// ---------------------------------------------------------------------------
2529
2530GraphicBufferAlloc::GraphicBufferAlloc() {}
2531
2532GraphicBufferAlloc::~GraphicBufferAlloc() {}
2533
2534sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2535        PixelFormat format, uint32_t usage, status_t* error) {
2536    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2537    status_t err = graphicBuffer->initCheck();
2538    *error = err;
2539    if (err != 0 || graphicBuffer->handle == 0) {
2540        if (err == NO_MEMORY) {
2541            GraphicBuffer::dumpAllocationsToSystemLog();
2542        }
2543        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2544             "failed (%s), handle=%p",
2545                w, h, strerror(-err), graphicBuffer->handle);
2546        return 0;
2547    }
2548    return graphicBuffer;
2549}
2550
2551// ---------------------------------------------------------------------------
2552
2553GraphicPlane::GraphicPlane()
2554    : mHw(0)
2555{
2556}
2557
2558GraphicPlane::~GraphicPlane() {
2559    delete mHw;
2560}
2561
2562bool GraphicPlane::initialized() const {
2563    return mHw ? true : false;
2564}
2565
2566int GraphicPlane::getWidth() const {
2567    return mWidth;
2568}
2569
2570int GraphicPlane::getHeight() const {
2571    return mHeight;
2572}
2573
2574void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2575{
2576    mHw = hw;
2577
2578    // initialize the display orientation transform.
2579    // it's a constant that should come from the display driver.
2580    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2581    char property[PROPERTY_VALUE_MAX];
2582    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2583        //displayOrientation
2584        switch (atoi(property)) {
2585        case 90:
2586            displayOrientation = ISurfaceComposer::eOrientation90;
2587            break;
2588        case 270:
2589            displayOrientation = ISurfaceComposer::eOrientation270;
2590            break;
2591        }
2592    }
2593
2594    const float w = hw->getWidth();
2595    const float h = hw->getHeight();
2596    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2597            &mDisplayTransform);
2598    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2599        mDisplayWidth = h;
2600        mDisplayHeight = w;
2601    } else {
2602        mDisplayWidth = w;
2603        mDisplayHeight = h;
2604    }
2605
2606    setOrientation(ISurfaceComposer::eOrientationDefault);
2607}
2608
2609status_t GraphicPlane::orientationToTransfrom(
2610        int orientation, int w, int h, Transform* tr)
2611{
2612    uint32_t flags = 0;
2613    switch (orientation) {
2614    case ISurfaceComposer::eOrientationDefault:
2615        flags = Transform::ROT_0;
2616        break;
2617    case ISurfaceComposer::eOrientation90:
2618        flags = Transform::ROT_90;
2619        break;
2620    case ISurfaceComposer::eOrientation180:
2621        flags = Transform::ROT_180;
2622        break;
2623    case ISurfaceComposer::eOrientation270:
2624        flags = Transform::ROT_270;
2625        break;
2626    default:
2627        return BAD_VALUE;
2628    }
2629    tr->set(flags, w, h);
2630    return NO_ERROR;
2631}
2632
2633status_t GraphicPlane::setOrientation(int orientation)
2634{
2635    // If the rotation can be handled in hardware, this is where
2636    // the magic should happen.
2637
2638    const DisplayHardware& hw(displayHardware());
2639    const float w = mDisplayWidth;
2640    const float h = mDisplayHeight;
2641    mWidth = int(w);
2642    mHeight = int(h);
2643
2644    Transform orientationTransform;
2645    GraphicPlane::orientationToTransfrom(orientation, w, h,
2646            &orientationTransform);
2647    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2648        mWidth = int(h);
2649        mHeight = int(w);
2650    }
2651
2652    mOrientation = orientation;
2653    mGlobalTransform = mDisplayTransform * orientationTransform;
2654    return NO_ERROR;
2655}
2656
2657const DisplayHardware& GraphicPlane::displayHardware() const {
2658    return *mHw;
2659}
2660
2661DisplayHardware& GraphicPlane::editDisplayHardware() {
2662    return *mHw;
2663}
2664
2665const Transform& GraphicPlane::transform() const {
2666    return mGlobalTransform;
2667}
2668
2669EGLDisplay GraphicPlane::getEGLDisplay() const {
2670    return mHw->getEGLDisplay();
2671}
2672
2673// ---------------------------------------------------------------------------
2674
2675}; // namespace android
2676