SurfaceFlinger.cpp revision 4a9ac37fe26644bb5253d15eec08be2edb896642 
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
746    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
747    mDirtyRegion.andSelf(screenRegion);
748}
749
750void SurfaceFlinger::invalidateHwcGeometry()
751{
752    mHwWorkListDirty = true;
753}
754
755bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
756{
757    bool recomputeVisibleRegions = false;
758    size_t count = currentLayers.size();
759    sp<LayerBase> const* layers = currentLayers.array();
760    for (size_t i=0 ; i<count ; i++) {
761        const sp<LayerBase>& layer(layers[i]);
762        layer->lockPageFlip(recomputeVisibleRegions);
763    }
764    return recomputeVisibleRegions;
765}
766
767void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
768{
769    const GraphicPlane& plane(graphicPlane(0));
770    const Transform& planeTransform(plane.transform());
771    size_t count = currentLayers.size();
772    sp<LayerBase> const* layers = currentLayers.array();
773    for (size_t i=0 ; i<count ; i++) {
774        const sp<LayerBase>& layer(layers[i]);
775        layer->unlockPageFlip(planeTransform, mDirtyRegion);
776    }
777}
778
779void SurfaceFlinger::handleWorkList()
780{
781    mHwWorkListDirty = false;
782    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
783    if (hwc.initCheck() == NO_ERROR) {
784        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
785        const size_t count = currentLayers.size();
786        hwc.createWorkList(count);
787        hwc_layer_t* const cur(hwc.getLayers());
788        for (size_t i=0 ; cur && i<count ; i++) {
789            currentLayers[i]->setGeometry(&cur[i]);
790            if (mDebugDisableHWC || mDebugRegion) {
791                cur[i].compositionType = HWC_FRAMEBUFFER;
792                cur[i].flags |= HWC_SKIP_LAYER;
793            }
794        }
795    }
796}
797
798void SurfaceFlinger::handleRepaint()
799{
800    // compute the invalid region
801    mSwapRegion.orSelf(mDirtyRegion);
802
803    if (UNLIKELY(mDebugRegion)) {
804        debugFlashRegions();
805    }
806
807    // set the frame buffer
808    const DisplayHardware& hw(graphicPlane(0).displayHardware());
809    glMatrixMode(GL_MODELVIEW);
810    glLoadIdentity();
811
812    uint32_t flags = hw.getFlags();
813    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
814        (flags & DisplayHardware::BUFFER_PRESERVED))
815    {
816        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
817        // takes a rectangle, we must make sure to update that whole
818        // rectangle in that case
819        if (flags & DisplayHardware::SWAP_RECTANGLE) {
820            // TODO: we really should be able to pass a region to
821            // SWAP_RECTANGLE so that we don't have to redraw all this.
822            mDirtyRegion.set(mSwapRegion.bounds());
823        } else {
824            // in the BUFFER_PRESERVED case, obviously, we can update only
825            // what's needed and nothing more.
826            // NOTE: this is NOT a common case, as preserving the backbuffer
827            // is costly and usually involves copying the whole update back.
828        }
829    } else {
830        if (flags & DisplayHardware::PARTIAL_UPDATES) {
831            // We need to redraw the rectangle that will be updated
832            // (pushed to the framebuffer).
833            // This is needed because PARTIAL_UPDATES only takes one
834            // rectangle instead of a region (see DisplayHardware::flip())
835            mDirtyRegion.set(mSwapRegion.bounds());
836        } else {
837            // we need to redraw everything (the whole screen)
838            mDirtyRegion.set(hw.bounds());
839            mSwapRegion = mDirtyRegion;
840        }
841    }
842
843    setupHardwareComposer(mDirtyRegion);
844    composeSurfaces(mDirtyRegion);
845
846    // update the swap region and clear the dirty region
847    mSwapRegion.orSelf(mDirtyRegion);
848    mDirtyRegion.clear();
849}
850
851void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
852{
853    const DisplayHardware& hw(graphicPlane(0).displayHardware());
854    HWComposer& hwc(hw.getHwComposer());
855    hwc_layer_t* const cur(hwc.getLayers());
856    if (!cur) {
857        return;
858    }
859
860    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
861    size_t count = layers.size();
862
863    LOGE_IF(hwc.getNumLayers() != count,
864            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
865            hwc.getNumLayers(), count);
866
867    // just to be extra-safe, use the smallest count
868    if (hwc.initCheck() == NO_ERROR) {
869        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
870    }
871
872    /*
873     *  update the per-frame h/w composer data for each layer
874     *  and build the transparent region of the FB
875     */
876    for (size_t i=0 ; i<count ; i++) {
877        const sp<LayerBase>& layer(layers[i]);
878        layer->setPerFrameData(&cur[i]);
879    }
880    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
881    status_t err = hwc.prepare();
882    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
883
884    if (err == NO_ERROR) {
885        // what's happening here is tricky.
886        // we want to clear all the layers with the CLEAR_FB flags
887        // that are opaque.
888        // however, since some GPU are efficient at preserving
889        // the backbuffer, we want to take advantage of that so we do the
890        // clear only in the dirty region (other areas will be preserved
891        // on those GPUs).
892        //   NOTE: on non backbuffer preserving GPU, the dirty region
893        //   has already been expanded as needed, so the code is correct
894        //   there too.
895        //
896        // However, the content of the framebuffer cannot be trusted when
897        // we switch to/from FB/OVERLAY, in which case we need to
898        // expand the dirty region to those areas too.
899        //
900        // Note also that there is a special case when switching from
901        // "no layers in FB" to "some layers in FB", where we need to redraw
902        // the entire FB, since some areas might contain uninitialized
903        // data.
904        //
905        // Also we want to make sure to not clear areas that belong to
906        // layers above that won't redraw (we would just be erasing them),
907        // that is, we can't erase anything outside the dirty region.
908
909        Region transparent;
910
911        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
912            transparent.set(hw.getBounds());
913            dirtyInOut = transparent;
914        } else {
915            for (size_t i=0 ; i<count ; i++) {
916                const sp<LayerBase>& layer(layers[i]);
917                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
918                    transparent.orSelf(layer->visibleRegionScreen);
919                }
920                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
921                if (isOverlay != layer->isOverlay()) {
922                    // we transitioned to/from overlay, so add this layer
923                    // to the dirty region so the framebuffer can be either
924                    // cleared or redrawn.
925                    dirtyInOut.orSelf(layer->visibleRegionScreen);
926                }
927                layer->setOverlay(isOverlay);
928            }
929            // don't erase stuff outside the dirty region
930            transparent.andSelf(dirtyInOut);
931        }
932
933        /*
934         *  clear the area of the FB that need to be transparent
935         */
936        if (!transparent.isEmpty()) {
937            glClearColor(0,0,0,0);
938            Region::const_iterator it = transparent.begin();
939            Region::const_iterator const end = transparent.end();
940            const int32_t height = hw.getHeight();
941            while (it != end) {
942                const Rect& r(*it++);
943                const GLint sy = height - (r.top + r.height());
944                glScissor(r.left, sy, r.width(), r.height());
945                glClear(GL_COLOR_BUFFER_BIT);
946            }
947        }
948    }
949}
950
951void SurfaceFlinger::composeSurfaces(const Region& dirty)
952{
953    const DisplayHardware& hw(graphicPlane(0).displayHardware());
954    HWComposer& hwc(hw.getHwComposer());
955
956    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
957    if (UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
958        // should never happen unless the window manager has a bug
959        // draw something...
960        drawWormhole();
961    }
962
963    /*
964     * and then, render the layers targeted at the framebuffer
965     */
966    hwc_layer_t* const cur(hwc.getLayers());
967    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
968    size_t count = layers.size();
969    for (size_t i=0 ; i<count ; i++) {
970        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
971            continue;
972        }
973        const sp<LayerBase>& layer(layers[i]);
974        const Region clip(dirty.intersect(layer->visibleRegionScreen));
975        if (!clip.isEmpty()) {
976            layer->draw(clip);
977        }
978    }
979}
980
981void SurfaceFlinger::debugFlashRegions()
982{
983    const DisplayHardware& hw(graphicPlane(0).displayHardware());
984    const uint32_t flags = hw.getFlags();
985    const int32_t height = hw.getHeight();
986    if (mSwapRegion.isEmpty()) {
987        return;
988    }
989
990    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
991            (flags & DisplayHardware::BUFFER_PRESERVED))) {
992        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
993                mDirtyRegion.bounds() : hw.bounds());
994        composeSurfaces(repaint);
995    }
996
997    glDisable(GL_TEXTURE_EXTERNAL_OES);
998    glDisable(GL_TEXTURE_2D);
999    glDisable(GL_BLEND);
1000    glDisable(GL_SCISSOR_TEST);
1001
1002    static int toggle = 0;
1003    toggle = 1 - toggle;
1004    if (toggle) {
1005        glColor4f(1, 0, 1, 1);
1006    } else {
1007        glColor4f(1, 1, 0, 1);
1008    }
1009
1010    Region::const_iterator it = mDirtyRegion.begin();
1011    Region::const_iterator const end = mDirtyRegion.end();
1012    while (it != end) {
1013        const Rect& r = *it++;
1014        GLfloat vertices[][2] = {
1015                { r.left,  height - r.top },
1016                { r.left,  height - r.bottom },
1017                { r.right, height - r.bottom },
1018                { r.right, height - r.top }
1019        };
1020        glVertexPointer(2, GL_FLOAT, 0, vertices);
1021        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1022    }
1023
1024    hw.flip(mSwapRegion);
1025
1026    if (mDebugRegion > 1)
1027        usleep(mDebugRegion * 1000);
1028
1029    glEnable(GL_SCISSOR_TEST);
1030}
1031
1032void SurfaceFlinger::drawWormhole() const
1033{
1034    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1035    if (region.isEmpty())
1036        return;
1037
1038    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1039    const int32_t width = hw.getWidth();
1040    const int32_t height = hw.getHeight();
1041
1042    if (LIKELY(!mDebugBackground)) {
1043        glClearColor(0,0,0,0);
1044        Region::const_iterator it = region.begin();
1045        Region::const_iterator const end = region.end();
1046        while (it != end) {
1047            const Rect& r = *it++;
1048            const GLint sy = height - (r.top + r.height());
1049            glScissor(r.left, sy, r.width(), r.height());
1050            glClear(GL_COLOR_BUFFER_BIT);
1051        }
1052    } else {
1053        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1054                { width, height }, { 0, height }  };
1055        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1056
1057        glVertexPointer(2, GL_SHORT, 0, vertices);
1058        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1059        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1060
1061        glDisable(GL_TEXTURE_EXTERNAL_OES);
1062        glEnable(GL_TEXTURE_2D);
1063        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1064        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1065        glMatrixMode(GL_TEXTURE);
1066        glLoadIdentity();
1067
1068        glDisable(GL_BLEND);
1069
1070        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1071        Region::const_iterator it = region.begin();
1072        Region::const_iterator const end = region.end();
1073        while (it != end) {
1074            const Rect& r = *it++;
1075            const GLint sy = height - (r.top + r.height());
1076            glScissor(r.left, sy, r.width(), r.height());
1077            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1078        }
1079        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1080        glDisable(GL_TEXTURE_2D);
1081        glLoadIdentity();
1082        glMatrixMode(GL_MODELVIEW);
1083    }
1084}
1085
1086void SurfaceFlinger::debugShowFPS() const
1087{
1088    static int mFrameCount;
1089    static int mLastFrameCount = 0;
1090    static nsecs_t mLastFpsTime = 0;
1091    static float mFps = 0;
1092    mFrameCount++;
1093    nsecs_t now = systemTime();
1094    nsecs_t diff = now - mLastFpsTime;
1095    if (diff > ms2ns(250)) {
1096        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1097        mLastFpsTime = now;
1098        mLastFrameCount = mFrameCount;
1099    }
1100    // XXX: mFPS has the value we want
1101 }
1102
1103status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1104{
1105    Mutex::Autolock _l(mStateLock);
1106    addLayer_l(layer);
1107    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1108    return NO_ERROR;
1109}
1110
1111status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1112{
1113    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1114    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1115}
1116
1117ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1118        const sp<LayerBaseClient>& lbc)
1119{
1120    // attach this layer to the client
1121    size_t name = client->attachLayer(lbc);
1122
1123    Mutex::Autolock _l(mStateLock);
1124
1125    // add this layer to the current state list
1126    addLayer_l(lbc);
1127
1128    return ssize_t(name);
1129}
1130
1131status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1132{
1133    Mutex::Autolock _l(mStateLock);
1134    status_t err = purgatorizeLayer_l(layer);
1135    if (err == NO_ERROR)
1136        setTransactionFlags(eTransactionNeeded);
1137    return err;
1138}
1139
1140status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1141{
1142    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1143    if (lbc != 0) {
1144        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1145    }
1146    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1147    if (index >= 0) {
1148        mLayersRemoved = true;
1149        return NO_ERROR;
1150    }
1151    return status_t(index);
1152}
1153
1154status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1155{
1156    // First add the layer to the purgatory list, which makes sure it won't
1157    // go away, then remove it from the main list (through a transaction).
1158    ssize_t err = removeLayer_l(layerBase);
1159    if (err >= 0) {
1160        mLayerPurgatory.add(layerBase);
1161    }
1162
1163    layerBase->onRemoved();
1164
1165    // it's possible that we don't find a layer, because it might
1166    // have been destroyed already -- this is not technically an error
1167    // from the user because there is a race between Client::destroySurface(),
1168    // ~Client() and ~ISurface().
1169    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1170}
1171
1172status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1173{
1174    layer->forceVisibilityTransaction();
1175    setTransactionFlags(eTraversalNeeded);
1176    return NO_ERROR;
1177}
1178
1179uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1180{
1181    return android_atomic_release_load(&mTransactionFlags);
1182}
1183
1184uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1185{
1186    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1187}
1188
1189uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1190{
1191    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1192    if ((old & flags)==0) { // wake the server up
1193        signalEvent();
1194    }
1195    return old;
1196}
1197
1198
1199void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1200        int orientation, uint32_t flags) {
1201    Mutex::Autolock _l(mStateLock);
1202
1203    uint32_t transactionFlags = 0;
1204    if (mCurrentState.orientation != orientation) {
1205        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1206            mCurrentState.orientation = orientation;
1207            transactionFlags |= eTransactionNeeded;
1208        } else if (orientation != eOrientationUnchanged) {
1209            LOGW("setTransactionState: ignoring unrecognized orientation: %d",
1210                    orientation);
1211        }
1212    }
1213
1214    const size_t count = state.size();
1215    for (size_t i=0 ; i<count ; i++) {
1216        const ComposerState& s(state[i]);
1217        sp<Client> client( static_cast<Client *>(s.client.get()) );
1218        transactionFlags |= setClientStateLocked(client, s.state);
1219    }
1220    if (transactionFlags) {
1221        setTransactionFlags(transactionFlags);
1222    }
1223
1224    // if this is a synchronous transaction, wait for it to take effect before
1225    // returning.
1226    if (flags & eSynchronous) {
1227        mTransationPending = true;
1228    }
1229    while (mTransationPending) {
1230        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1231        if (CC_UNLIKELY(err != NO_ERROR)) {
1232            // just in case something goes wrong in SF, return to the
1233            // called after a few seconds.
1234            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1235            mTransationPending = false;
1236            break;
1237        }
1238    }
1239}
1240
1241int SurfaceFlinger::setOrientation(DisplayID dpy,
1242        int orientation, uint32_t flags)
1243{
1244    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1245        return BAD_VALUE;
1246
1247    Mutex::Autolock _l(mStateLock);
1248    if (mCurrentState.orientation != orientation) {
1249        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1250            mCurrentState.orientationFlags = flags;
1251            mCurrentState.orientation = orientation;
1252            setTransactionFlags(eTransactionNeeded);
1253            mTransactionCV.wait(mStateLock);
1254        } else {
1255            orientation = BAD_VALUE;
1256        }
1257    }
1258    return orientation;
1259}
1260
1261sp<ISurface> SurfaceFlinger::createSurface(
1262        ISurfaceComposerClient::surface_data_t* params,
1263        const String8& name,
1264        const sp<Client>& client,
1265        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1266        uint32_t flags)
1267{
1268    sp<LayerBaseClient> layer;
1269    sp<ISurface> surfaceHandle;
1270
1271    if (int32_t(w|h) < 0) {
1272        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1273                int(w), int(h));
1274        return surfaceHandle;
1275    }
1276
1277    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1278    sp<Layer> normalLayer;
1279    switch (flags & eFXSurfaceMask) {
1280        case eFXSurfaceNormal:
1281            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1282            layer = normalLayer;
1283            break;
1284        case eFXSurfaceBlur:
1285            // for now we treat Blur as Dim, until we can implement it
1286            // efficiently.
1287        case eFXSurfaceDim:
1288            layer = createDimSurface(client, d, w, h, flags);
1289            break;
1290        case eFXSurfaceScreenshot:
1291            layer = createScreenshotSurface(client, d, w, h, flags);
1292            break;
1293    }
1294
1295    if (layer != 0) {
1296        layer->initStates(w, h, flags);
1297        layer->setName(name);
1298        ssize_t token = addClientLayer(client, layer);
1299
1300        surfaceHandle = layer->getSurface();
1301        if (surfaceHandle != 0) {
1302            params->token = token;
1303            params->identity = layer->getIdentity();
1304            if (normalLayer != 0) {
1305                Mutex::Autolock _l(mStateLock);
1306                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1307            }
1308        }
1309
1310        setTransactionFlags(eTransactionNeeded);
1311    }
1312
1313    return surfaceHandle;
1314}
1315
1316sp<Layer> SurfaceFlinger::createNormalSurface(
1317        const sp<Client>& client, DisplayID display,
1318        uint32_t w, uint32_t h, uint32_t flags,
1319        PixelFormat& format)
1320{
1321    // initialize the surfaces
1322    switch (format) { // TODO: take h/w into account
1323    case PIXEL_FORMAT_TRANSPARENT:
1324    case PIXEL_FORMAT_TRANSLUCENT:
1325        format = PIXEL_FORMAT_RGBA_8888;
1326        break;
1327    case PIXEL_FORMAT_OPAQUE:
1328#ifdef NO_RGBX_8888
1329        format = PIXEL_FORMAT_RGB_565;
1330#else
1331        format = PIXEL_FORMAT_RGBX_8888;
1332#endif
1333        break;
1334    }
1335
1336#ifdef NO_RGBX_8888
1337    if (format == PIXEL_FORMAT_RGBX_8888)
1338        format = PIXEL_FORMAT_RGBA_8888;
1339#endif
1340
1341    sp<Layer> layer = new Layer(this, display, client);
1342    status_t err = layer->setBuffers(w, h, format, flags);
1343    if (LIKELY(err != NO_ERROR)) {
1344        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1345        layer.clear();
1346    }
1347    return layer;
1348}
1349
1350sp<LayerDim> SurfaceFlinger::createDimSurface(
1351        const sp<Client>& client, DisplayID display,
1352        uint32_t w, uint32_t h, uint32_t flags)
1353{
1354    sp<LayerDim> layer = new LayerDim(this, display, client);
1355    return layer;
1356}
1357
1358sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1359        const sp<Client>& client, DisplayID display,
1360        uint32_t w, uint32_t h, uint32_t flags)
1361{
1362    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1363    return layer;
1364}
1365
1366status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1367{
1368    /*
1369     * called by the window manager, when a surface should be marked for
1370     * destruction.
1371     *
1372     * The surface is removed from the current and drawing lists, but placed
1373     * in the purgatory queue, so it's not destroyed right-away (we need
1374     * to wait for all client's references to go away first).
1375     */
1376
1377    status_t err = NAME_NOT_FOUND;
1378    Mutex::Autolock _l(mStateLock);
1379    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1380    if (layer != 0) {
1381        err = purgatorizeLayer_l(layer);
1382        if (err == NO_ERROR) {
1383            setTransactionFlags(eTransactionNeeded);
1384        }
1385    }
1386    return err;
1387}
1388
1389status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1390{
1391    // called by ~ISurface() when all references are gone
1392    status_t err = NO_ERROR;
1393    sp<LayerBaseClient> l(layer.promote());
1394    if (l != NULL) {
1395        Mutex::Autolock _l(mStateLock);
1396        err = removeLayer_l(l);
1397        if (err == NAME_NOT_FOUND) {
1398            // The surface wasn't in the current list, which means it was
1399            // removed already, which means it is in the purgatory,
1400            // and need to be removed from there.
1401            ssize_t idx = mLayerPurgatory.remove(l);
1402            LOGE_IF(idx < 0,
1403                    "layer=%p is not in the purgatory list", l.get());
1404        }
1405        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1406                "error removing layer=%p (%s)", l.get(), strerror(-err));
1407    }
1408    return err;
1409}
1410
1411uint32_t SurfaceFlinger::setClientStateLocked(
1412        const sp<Client>& client,
1413        const layer_state_t& s)
1414{
1415    uint32_t flags = 0;
1416    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1417    if (layer != 0) {
1418        const uint32_t what = s.what;
1419        if (what & ePositionChanged) {
1420            if (layer->setPosition(s.x, s.y))
1421                flags |= eTraversalNeeded;
1422        }
1423        if (what & eLayerChanged) {
1424            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1425            if (layer->setLayer(s.z)) {
1426                mCurrentState.layersSortedByZ.removeAt(idx);
1427                mCurrentState.layersSortedByZ.add(layer);
1428                // we need traversal (state changed)
1429                // AND transaction (list changed)
1430                flags |= eTransactionNeeded|eTraversalNeeded;
1431            }
1432        }
1433        if (what & eSizeChanged) {
1434            if (layer->setSize(s.w, s.h)) {
1435                flags |= eTraversalNeeded;
1436            }
1437        }
1438        if (what & eAlphaChanged) {
1439            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1440                flags |= eTraversalNeeded;
1441        }
1442        if (what & eMatrixChanged) {
1443            if (layer->setMatrix(s.matrix))
1444                flags |= eTraversalNeeded;
1445        }
1446        if (what & eTransparentRegionChanged) {
1447            if (layer->setTransparentRegionHint(s.transparentRegion))
1448                flags |= eTraversalNeeded;
1449        }
1450        if (what & eVisibilityChanged) {
1451            if (layer->setFlags(s.flags, s.mask))
1452                flags |= eTraversalNeeded;
1453        }
1454    }
1455    return flags;
1456}
1457
1458void SurfaceFlinger::screenReleased(int dpy)
1459{
1460    // this may be called by a signal handler, we can't do too much in here
1461    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1462    signalEvent();
1463}
1464
1465void SurfaceFlinger::screenAcquired(int dpy)
1466{
1467    // this may be called by a signal handler, we can't do too much in here
1468    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1469    signalEvent();
1470}
1471
1472status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1473{
1474    const size_t SIZE = 4096;
1475    char buffer[SIZE];
1476    String8 result;
1477
1478    if (!PermissionCache::checkCallingPermission(sDump)) {
1479        snprintf(buffer, SIZE, "Permission Denial: "
1480                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1481                IPCThreadState::self()->getCallingPid(),
1482                IPCThreadState::self()->getCallingUid());
1483        result.append(buffer);
1484    } else {
1485
1486        // figure out if we're stuck somewhere
1487        const nsecs_t now = systemTime();
1488        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1489        const nsecs_t inTransaction(mDebugInTransaction);
1490        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1491        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1492
1493        // Try to get the main lock, but don't insist if we can't
1494        // (this would indicate SF is stuck, but we want to be able to
1495        // print something in dumpsys).
1496        int retry = 3;
1497        while (mStateLock.tryLock()<0 && --retry>=0) {
1498            usleep(1000000);
1499        }
1500        const bool locked(retry >= 0);
1501        if (!locked) {
1502            snprintf(buffer, SIZE,
1503                    "SurfaceFlinger appears to be unresponsive, "
1504                    "dumping anyways (no locks held)\n");
1505            result.append(buffer);
1506        }
1507
1508        /*
1509         * Dump the visible layer list
1510         */
1511        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1512        const size_t count = currentLayers.size();
1513        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1514        result.append(buffer);
1515        for (size_t i=0 ; i<count ; i++) {
1516            const sp<LayerBase>& layer(currentLayers[i]);
1517            layer->dump(result, buffer, SIZE);
1518            const Layer::State& s(layer->drawingState());
1519            s.transparentRegion.dump(result, "transparentRegion");
1520            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1521            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1522        }
1523
1524        /*
1525         * Dump the layers in the purgatory
1526         */
1527
1528        const size_t purgatorySize =  mLayerPurgatory.size();
1529        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1530        result.append(buffer);
1531        for (size_t i=0 ; i<purgatorySize ; i++) {
1532            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1533            layer->shortDump(result, buffer, SIZE);
1534        }
1535
1536        /*
1537         * Dump SurfaceFlinger global state
1538         */
1539
1540        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1541        result.append(buffer);
1542
1543        const GLExtensions& extensions(GLExtensions::getInstance());
1544        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1545                extensions.getVendor(),
1546                extensions.getRenderer(),
1547                extensions.getVersion());
1548        result.append(buffer);
1549        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1550        result.append(buffer);
1551
1552        mWormholeRegion.dump(result, "WormholeRegion");
1553        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1554        snprintf(buffer, SIZE,
1555                "  orientation=%d, canDraw=%d\n",
1556                mCurrentState.orientation, hw.canDraw());
1557        result.append(buffer);
1558        snprintf(buffer, SIZE,
1559                "  last eglSwapBuffers() time: %f us\n"
1560                "  last transaction time     : %f us\n"
1561                "  refresh-rate              : %f fps\n"
1562                "  x-dpi                     : %f\n"
1563                "  y-dpi                     : %f\n",
1564                mLastSwapBufferTime/1000.0,
1565                mLastTransactionTime/1000.0,
1566                hw.getRefreshRate(),
1567                hw.getDpiX(),
1568                hw.getDpiY());
1569        result.append(buffer);
1570
1571        if (inSwapBuffersDuration || !locked) {
1572            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1573                    inSwapBuffersDuration/1000.0);
1574            result.append(buffer);
1575        }
1576
1577        if (inTransactionDuration || !locked) {
1578            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1579                    inTransactionDuration/1000.0);
1580            result.append(buffer);
1581        }
1582
1583        /*
1584         * Dump HWComposer state
1585         */
1586        HWComposer& hwc(hw.getHwComposer());
1587        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1588                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1589                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1590        result.append(buffer);
1591        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1592
1593        /*
1594         * Dump gralloc state
1595         */
1596        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1597        alloc.dump(result);
1598        hw.dump(result);
1599
1600        if (locked) {
1601            mStateLock.unlock();
1602        }
1603    }
1604    write(fd, result.string(), result.size());
1605    return NO_ERROR;
1606}
1607
1608status_t SurfaceFlinger::onTransact(
1609    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1610{
1611    switch (code) {
1612        case CREATE_CONNECTION:
1613        case SET_TRANSACTION_STATE:
1614        case SET_ORIENTATION:
1615        case BOOT_FINISHED:
1616        case TURN_ELECTRON_BEAM_OFF:
1617        case TURN_ELECTRON_BEAM_ON:
1618        {
1619            // codes that require permission check
1620            IPCThreadState* ipc = IPCThreadState::self();
1621            const int pid = ipc->getCallingPid();
1622            const int uid = ipc->getCallingUid();
1623            if ((uid != AID_GRAPHICS) &&
1624                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1625                LOGE("Permission Denial: "
1626                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1627                return PERMISSION_DENIED;
1628            }
1629            break;
1630        }
1631        case CAPTURE_SCREEN:
1632        {
1633            // codes that require permission check
1634            IPCThreadState* ipc = IPCThreadState::self();
1635            const int pid = ipc->getCallingPid();
1636            const int uid = ipc->getCallingUid();
1637            if ((uid != AID_GRAPHICS) &&
1638                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1639                LOGE("Permission Denial: "
1640                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1641                return PERMISSION_DENIED;
1642            }
1643            break;
1644        }
1645    }
1646
1647    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1648    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1649        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1650        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1651            IPCThreadState* ipc = IPCThreadState::self();
1652            const int pid = ipc->getCallingPid();
1653            const int uid = ipc->getCallingUid();
1654            LOGE("Permission Denial: "
1655                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1656            return PERMISSION_DENIED;
1657        }
1658        int n;
1659        switch (code) {
1660            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1661            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1662                return NO_ERROR;
1663            case 1002:  // SHOW_UPDATES
1664                n = data.readInt32();
1665                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1666                invalidateHwcGeometry();
1667                repaintEverything();
1668                return NO_ERROR;
1669            case 1003:  // SHOW_BACKGROUND
1670                n = data.readInt32();
1671                mDebugBackground = n ? 1 : 0;
1672                return NO_ERROR;
1673            case 1004:{ // repaint everything
1674                repaintEverything();
1675                return NO_ERROR;
1676            }
1677            case 1005:{ // force transaction
1678                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1679                return NO_ERROR;
1680            }
1681            case 1006:{ // enable/disable GraphicLog
1682                int enabled = data.readInt32();
1683                GraphicLog::getInstance().setEnabled(enabled);
1684                return NO_ERROR;
1685            }
1686            case 1008:  // toggle use of hw composer
1687                n = data.readInt32();
1688                mDebugDisableHWC = n ? 1 : 0;
1689                invalidateHwcGeometry();
1690                repaintEverything();
1691                return NO_ERROR;
1692            case 1009:  // toggle use of transform hint
1693                n = data.readInt32();
1694                mDebugDisableTransformHint = n ? 1 : 0;
1695                invalidateHwcGeometry();
1696                repaintEverything();
1697                return NO_ERROR;
1698            case 1010:  // interrogate.
1699                reply->writeInt32(0);
1700                reply->writeInt32(0);
1701                reply->writeInt32(mDebugRegion);
1702                reply->writeInt32(mDebugBackground);
1703                return NO_ERROR;
1704            case 1013: {
1705                Mutex::Autolock _l(mStateLock);
1706                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1707                reply->writeInt32(hw.getPageFlipCount());
1708            }
1709            return NO_ERROR;
1710        }
1711    }
1712    return err;
1713}
1714
1715void SurfaceFlinger::repaintEverything() {
1716    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1717    const Rect bounds(hw.getBounds());
1718    setInvalidateRegion(Region(bounds));
1719    signalEvent();
1720}
1721
1722void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1723    Mutex::Autolock _l(mInvalidateLock);
1724    mInvalidateRegion = reg;
1725}
1726
1727Region SurfaceFlinger::getAndClearInvalidateRegion() {
1728    Mutex::Autolock _l(mInvalidateLock);
1729    Region reg(mInvalidateRegion);
1730    mInvalidateRegion.clear();
1731    return reg;
1732}
1733
1734// ---------------------------------------------------------------------------
1735
1736status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1737        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1738{
1739    Mutex::Autolock _l(mStateLock);
1740    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1741}
1742
1743status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1744        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1745{
1746    if (!GLExtensions::getInstance().haveFramebufferObject())
1747        return INVALID_OPERATION;
1748
1749    // get screen geometry
1750    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1751    const uint32_t hw_w = hw.getWidth();
1752    const uint32_t hw_h = hw.getHeight();
1753    GLfloat u = 1;
1754    GLfloat v = 1;
1755
1756    // make sure to clear all GL error flags
1757    while ( glGetError() != GL_NO_ERROR ) ;
1758
1759    // create a FBO
1760    GLuint name, tname;
1761    glGenTextures(1, &tname);
1762    glBindTexture(GL_TEXTURE_2D, tname);
1763    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1764            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1765    if (glGetError() != GL_NO_ERROR) {
1766        while ( glGetError() != GL_NO_ERROR ) ;
1767        GLint tw = (2 << (31 - clz(hw_w)));
1768        GLint th = (2 << (31 - clz(hw_h)));
1769        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1770                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1771        u = GLfloat(hw_w) / tw;
1772        v = GLfloat(hw_h) / th;
1773    }
1774    glGenFramebuffersOES(1, &name);
1775    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1776    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1777            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1778
1779    // redraw the screen entirely...
1780    glDisable(GL_TEXTURE_EXTERNAL_OES);
1781    glDisable(GL_TEXTURE_2D);
1782    glDisable(GL_SCISSOR_TEST);
1783    glClearColor(0,0,0,1);
1784    glClear(GL_COLOR_BUFFER_BIT);
1785    glEnable(GL_SCISSOR_TEST);
1786    glMatrixMode(GL_MODELVIEW);
1787    glLoadIdentity();
1788    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1789    const size_t count = layers.size();
1790    for (size_t i=0 ; i<count ; ++i) {
1791        const sp<LayerBase>& layer(layers[i]);
1792        layer->drawForSreenShot();
1793    }
1794
1795    hw.compositionComplete();
1796
1797    // back to main framebuffer
1798    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1799    glDisable(GL_SCISSOR_TEST);
1800    glDeleteFramebuffersOES(1, &name);
1801
1802    *textureName = tname;
1803    *uOut = u;
1804    *vOut = v;
1805    return NO_ERROR;
1806}
1807
1808// ---------------------------------------------------------------------------
1809
1810status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1811{
1812    // get screen geometry
1813    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1814    const uint32_t hw_w = hw.getWidth();
1815    const uint32_t hw_h = hw.getHeight();
1816    const Region screenBounds(hw.getBounds());
1817
1818    GLfloat u, v;
1819    GLuint tname;
1820    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1821    if (result != NO_ERROR) {
1822        return result;
1823    }
1824
1825    GLfloat vtx[8];
1826    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1827    glBindTexture(GL_TEXTURE_2D, tname);
1828    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1829    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1830    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1831    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1832    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1833    glVertexPointer(2, GL_FLOAT, 0, vtx);
1834
1835    /*
1836     * Texture coordinate mapping
1837     *
1838     *                 u
1839     *    1 +----------+---+
1840     *      |     |    |   |  image is inverted
1841     *      |     V    |   |  w.r.t. the texture
1842     *  1-v +----------+   |  coordinates
1843     *      |              |
1844     *      |              |
1845     *      |              |
1846     *    0 +--------------+
1847     *      0              1
1848     *
1849     */
1850
1851    class s_curve_interpolator {
1852        const float nbFrames, s, v;
1853    public:
1854        s_curve_interpolator(int nbFrames, float s)
1855        : nbFrames(1.0f / (nbFrames-1)), s(s),
1856          v(1.0f + expf(-s + 0.5f*s)) {
1857        }
1858        float operator()(int f) {
1859            const float x = f * nbFrames;
1860            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1861        }
1862    };
1863
1864    class v_stretch {
1865        const GLfloat hw_w, hw_h;
1866    public:
1867        v_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 = hw_h - (hw_h * v);
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    class h_stretch {
1883        const GLfloat hw_w, hw_h;
1884    public:
1885        h_stretch(uint32_t hw_w, uint32_t hw_h)
1886        : hw_w(hw_w), hw_h(hw_h) {
1887        }
1888        void operator()(GLfloat* vtx, float v) {
1889            const GLfloat w = hw_w - (hw_w * v);
1890            const GLfloat h = 1.0f;
1891            const GLfloat x = (hw_w - w) * 0.5f;
1892            const GLfloat y = (hw_h - h) * 0.5f;
1893            vtx[0] = x;         vtx[1] = y;
1894            vtx[2] = x;         vtx[3] = y + h;
1895            vtx[4] = x + w;     vtx[5] = y + h;
1896            vtx[6] = x + w;     vtx[7] = y;
1897        }
1898    };
1899
1900    // the full animation is 24 frames
1901    char value[PROPERTY_VALUE_MAX];
1902    property_get("debug.sf.electron_frames", value, "24");
1903    int nbFrames = (atoi(value) + 1) >> 1;
1904    if (nbFrames <= 0) // just in case
1905        nbFrames = 24;
1906
1907    s_curve_interpolator itr(nbFrames, 7.5f);
1908    s_curve_interpolator itg(nbFrames, 8.0f);
1909    s_curve_interpolator itb(nbFrames, 8.5f);
1910
1911    v_stretch vverts(hw_w, hw_h);
1912
1913    glMatrixMode(GL_TEXTURE);
1914    glLoadIdentity();
1915    glMatrixMode(GL_MODELVIEW);
1916    glLoadIdentity();
1917
1918    glEnable(GL_BLEND);
1919    glBlendFunc(GL_ONE, GL_ONE);
1920    for (int i=0 ; i<nbFrames ; i++) {
1921        float x, y, w, h;
1922        const float vr = itr(i);
1923        const float vg = itg(i);
1924        const float vb = itb(i);
1925
1926        // clear screen
1927        glColorMask(1,1,1,1);
1928        glClear(GL_COLOR_BUFFER_BIT);
1929        glEnable(GL_TEXTURE_2D);
1930
1931        // draw the red plane
1932        vverts(vtx, vr);
1933        glColorMask(1,0,0,1);
1934        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1935
1936        // draw the green plane
1937        vverts(vtx, vg);
1938        glColorMask(0,1,0,1);
1939        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1940
1941        // draw the blue plane
1942        vverts(vtx, vb);
1943        glColorMask(0,0,1,1);
1944        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1945
1946        // draw the white highlight (we use the last vertices)
1947        glDisable(GL_TEXTURE_2D);
1948        glColorMask(1,1,1,1);
1949        glColor4f(vg, vg, vg, 1);
1950        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1951        hw.flip(screenBounds);
1952    }
1953
1954    h_stretch hverts(hw_w, hw_h);
1955    glDisable(GL_BLEND);
1956    glDisable(GL_TEXTURE_2D);
1957    glColorMask(1,1,1,1);
1958    for (int i=0 ; i<nbFrames ; i++) {
1959        const float v = itg(i);
1960        hverts(vtx, v);
1961        glClear(GL_COLOR_BUFFER_BIT);
1962        glColor4f(1-v, 1-v, 1-v, 1);
1963        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1964        hw.flip(screenBounds);
1965    }
1966
1967    glColorMask(1,1,1,1);
1968    glEnable(GL_SCISSOR_TEST);
1969    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1970    glDeleteTextures(1, &tname);
1971    glDisable(GL_TEXTURE_2D);
1972    glDisable(GL_BLEND);
1973    return NO_ERROR;
1974}
1975
1976status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1977{
1978    status_t result = PERMISSION_DENIED;
1979
1980    if (!GLExtensions::getInstance().haveFramebufferObject())
1981        return INVALID_OPERATION;
1982
1983
1984    // get screen geometry
1985    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1986    const uint32_t hw_w = hw.getWidth();
1987    const uint32_t hw_h = hw.getHeight();
1988    const Region screenBounds(hw.bounds());
1989
1990    GLfloat u, v;
1991    GLuint tname;
1992    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1993    if (result != NO_ERROR) {
1994        return result;
1995    }
1996
1997    GLfloat vtx[8];
1998    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1999    glBindTexture(GL_TEXTURE_2D, tname);
2000    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2001    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2002    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2003    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2004    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2005    glVertexPointer(2, GL_FLOAT, 0, vtx);
2006
2007    class s_curve_interpolator {
2008        const float nbFrames, s, v;
2009    public:
2010        s_curve_interpolator(int nbFrames, float s)
2011        : nbFrames(1.0f / (nbFrames-1)), s(s),
2012          v(1.0f + expf(-s + 0.5f*s)) {
2013        }
2014        float operator()(int f) {
2015            const float x = f * nbFrames;
2016            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2017        }
2018    };
2019
2020    class v_stretch {
2021        const GLfloat hw_w, hw_h;
2022    public:
2023        v_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 = hw_h - (hw_h * v);
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    class h_stretch {
2039        const GLfloat hw_w, hw_h;
2040    public:
2041        h_stretch(uint32_t hw_w, uint32_t hw_h)
2042        : hw_w(hw_w), hw_h(hw_h) {
2043        }
2044        void operator()(GLfloat* vtx, float v) {
2045            const GLfloat w = hw_w - (hw_w * v);
2046            const GLfloat h = 1.0f;
2047            const GLfloat x = (hw_w - w) * 0.5f;
2048            const GLfloat y = (hw_h - h) * 0.5f;
2049            vtx[0] = x;         vtx[1] = y;
2050            vtx[2] = x;         vtx[3] = y + h;
2051            vtx[4] = x + w;     vtx[5] = y + h;
2052            vtx[6] = x + w;     vtx[7] = y;
2053        }
2054    };
2055
2056    // the full animation is 12 frames
2057    int nbFrames = 8;
2058    s_curve_interpolator itr(nbFrames, 7.5f);
2059    s_curve_interpolator itg(nbFrames, 8.0f);
2060    s_curve_interpolator itb(nbFrames, 8.5f);
2061
2062    h_stretch hverts(hw_w, hw_h);
2063    glDisable(GL_BLEND);
2064    glDisable(GL_TEXTURE_2D);
2065    glColorMask(1,1,1,1);
2066    for (int i=nbFrames-1 ; i>=0 ; i--) {
2067        const float v = itg(i);
2068        hverts(vtx, v);
2069        glClear(GL_COLOR_BUFFER_BIT);
2070        glColor4f(1-v, 1-v, 1-v, 1);
2071        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2072        hw.flip(screenBounds);
2073    }
2074
2075    nbFrames = 4;
2076    v_stretch vverts(hw_w, hw_h);
2077    glEnable(GL_BLEND);
2078    glBlendFunc(GL_ONE, GL_ONE);
2079    for (int i=nbFrames-1 ; i>=0 ; i--) {
2080        float x, y, w, h;
2081        const float vr = itr(i);
2082        const float vg = itg(i);
2083        const float vb = itb(i);
2084
2085        // clear screen
2086        glColorMask(1,1,1,1);
2087        glClear(GL_COLOR_BUFFER_BIT);
2088        glEnable(GL_TEXTURE_2D);
2089
2090        // draw the red plane
2091        vverts(vtx, vr);
2092        glColorMask(1,0,0,1);
2093        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2094
2095        // draw the green plane
2096        vverts(vtx, vg);
2097        glColorMask(0,1,0,1);
2098        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2099
2100        // draw the blue plane
2101        vverts(vtx, vb);
2102        glColorMask(0,0,1,1);
2103        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2104
2105        hw.flip(screenBounds);
2106    }
2107
2108    glColorMask(1,1,1,1);
2109    glEnable(GL_SCISSOR_TEST);
2110    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2111    glDeleteTextures(1, &tname);
2112    glDisable(GL_TEXTURE_2D);
2113    glDisable(GL_BLEND);
2114
2115    return NO_ERROR;
2116}
2117
2118// ---------------------------------------------------------------------------
2119
2120status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2121{
2122    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2123    if (!hw.canDraw()) {
2124        // we're already off
2125        return NO_ERROR;
2126    }
2127
2128    // turn off hwc while we're doing the animation
2129    hw.getHwComposer().disable();
2130    // and make sure to turn it back on (if needed) next time we compose
2131    invalidateHwcGeometry();
2132
2133    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2134        electronBeamOffAnimationImplLocked();
2135    }
2136
2137    // always clear the whole screen at the end of the animation
2138    glClearColor(0,0,0,1);
2139    glDisable(GL_SCISSOR_TEST);
2140    glClear(GL_COLOR_BUFFER_BIT);
2141    glEnable(GL_SCISSOR_TEST);
2142    hw.flip( Region(hw.bounds()) );
2143
2144    return NO_ERROR;
2145}
2146
2147status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2148{
2149    class MessageTurnElectronBeamOff : public MessageBase {
2150        SurfaceFlinger* flinger;
2151        int32_t mode;
2152        status_t result;
2153    public:
2154        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2155            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2156        }
2157        status_t getResult() const {
2158            return result;
2159        }
2160        virtual bool handler() {
2161            Mutex::Autolock _l(flinger->mStateLock);
2162            result = flinger->turnElectronBeamOffImplLocked(mode);
2163            return true;
2164        }
2165    };
2166
2167    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2168    status_t res = postMessageSync(msg);
2169    if (res == NO_ERROR) {
2170        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2171
2172        // work-around: when the power-manager calls us we activate the
2173        // animation. eventually, the "on" animation will be called
2174        // by the power-manager itself
2175        mElectronBeamAnimationMode = mode;
2176    }
2177    return res;
2178}
2179
2180// ---------------------------------------------------------------------------
2181
2182status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2183{
2184    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2185    if (hw.canDraw()) {
2186        // we're already on
2187        return NO_ERROR;
2188    }
2189    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2190        electronBeamOnAnimationImplLocked();
2191    }
2192
2193    // make sure to redraw the whole screen when the animation is done
2194    mDirtyRegion.set(hw.bounds());
2195    signalEvent();
2196
2197    return NO_ERROR;
2198}
2199
2200status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2201{
2202    class MessageTurnElectronBeamOn : public MessageBase {
2203        SurfaceFlinger* flinger;
2204        int32_t mode;
2205        status_t result;
2206    public:
2207        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2208            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2209        }
2210        status_t getResult() const {
2211            return result;
2212        }
2213        virtual bool handler() {
2214            Mutex::Autolock _l(flinger->mStateLock);
2215            result = flinger->turnElectronBeamOnImplLocked(mode);
2216            return true;
2217        }
2218    };
2219
2220    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2221    return NO_ERROR;
2222}
2223
2224// ---------------------------------------------------------------------------
2225
2226status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2227        sp<IMemoryHeap>* heap,
2228        uint32_t* w, uint32_t* h, PixelFormat* f,
2229        uint32_t sw, uint32_t sh,
2230        uint32_t minLayerZ, uint32_t maxLayerZ)
2231{
2232    status_t result = PERMISSION_DENIED;
2233
2234    // only one display supported for now
2235    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2236        return BAD_VALUE;
2237
2238    if (!GLExtensions::getInstance().haveFramebufferObject())
2239        return INVALID_OPERATION;
2240
2241    // get screen geometry
2242    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2243    const uint32_t hw_w = hw.getWidth();
2244    const uint32_t hw_h = hw.getHeight();
2245
2246    if ((sw > hw_w) || (sh > hw_h))
2247        return BAD_VALUE;
2248
2249    sw = (!sw) ? hw_w : sw;
2250    sh = (!sh) ? hw_h : sh;
2251    const size_t size = sw * sh * 4;
2252
2253    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2254    //        sw, sh, minLayerZ, maxLayerZ);
2255
2256    // make sure to clear all GL error flags
2257    while ( glGetError() != GL_NO_ERROR ) ;
2258
2259    // create a FBO
2260    GLuint name, tname;
2261    glGenRenderbuffersOES(1, &tname);
2262    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2263    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2264    glGenFramebuffersOES(1, &name);
2265    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2266    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2267            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2268
2269    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2270
2271    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2272
2273        // invert everything, b/c glReadPixel() below will invert the FB
2274        glViewport(0, 0, sw, sh);
2275        glScissor(0, 0, sw, sh);
2276        glEnable(GL_SCISSOR_TEST);
2277        glMatrixMode(GL_PROJECTION);
2278        glPushMatrix();
2279        glLoadIdentity();
2280        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2281        glMatrixMode(GL_MODELVIEW);
2282
2283        // redraw the screen entirely...
2284        glClearColor(0,0,0,1);
2285        glClear(GL_COLOR_BUFFER_BIT);
2286
2287        const LayerVector& layers(mDrawingState.layersSortedByZ);
2288        const size_t count = layers.size();
2289        for (size_t i=0 ; i<count ; ++i) {
2290            const sp<LayerBase>& layer(layers[i]);
2291            const uint32_t flags = layer->drawingState().flags;
2292            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2293                const uint32_t z = layer->drawingState().z;
2294                if (z >= minLayerZ && z <= maxLayerZ) {
2295                    layer->drawForSreenShot();
2296                }
2297            }
2298        }
2299
2300        // XXX: this is needed on tegra
2301        glEnable(GL_SCISSOR_TEST);
2302        glScissor(0, 0, sw, sh);
2303
2304        // check for errors and return screen capture
2305        if (glGetError() != GL_NO_ERROR) {
2306            // error while rendering
2307            result = INVALID_OPERATION;
2308        } else {
2309            // allocate shared memory large enough to hold the
2310            // screen capture
2311            sp<MemoryHeapBase> base(
2312                    new MemoryHeapBase(size, 0, "screen-capture") );
2313            void* const ptr = base->getBase();
2314            if (ptr) {
2315                // capture the screen with glReadPixels()
2316                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2317                if (glGetError() == GL_NO_ERROR) {
2318                    *heap = base;
2319                    *w = sw;
2320                    *h = sh;
2321                    *f = PIXEL_FORMAT_RGBA_8888;
2322                    result = NO_ERROR;
2323                }
2324            } else {
2325                result = NO_MEMORY;
2326            }
2327        }
2328        glEnable(GL_SCISSOR_TEST);
2329        glViewport(0, 0, hw_w, hw_h);
2330        glMatrixMode(GL_PROJECTION);
2331        glPopMatrix();
2332        glMatrixMode(GL_MODELVIEW);
2333    } else {
2334        result = BAD_VALUE;
2335    }
2336
2337    // release FBO resources
2338    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2339    glDeleteRenderbuffersOES(1, &tname);
2340    glDeleteFramebuffersOES(1, &name);
2341
2342    hw.compositionComplete();
2343
2344    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2345
2346    return result;
2347}
2348
2349
2350status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2351        sp<IMemoryHeap>* heap,
2352        uint32_t* width, uint32_t* height, PixelFormat* format,
2353        uint32_t sw, uint32_t sh,
2354        uint32_t minLayerZ, uint32_t maxLayerZ)
2355{
2356    // only one display supported for now
2357    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2358        return BAD_VALUE;
2359
2360    if (!GLExtensions::getInstance().haveFramebufferObject())
2361        return INVALID_OPERATION;
2362
2363    class MessageCaptureScreen : public MessageBase {
2364        SurfaceFlinger* flinger;
2365        DisplayID dpy;
2366        sp<IMemoryHeap>* heap;
2367        uint32_t* w;
2368        uint32_t* h;
2369        PixelFormat* f;
2370        uint32_t sw;
2371        uint32_t sh;
2372        uint32_t minLayerZ;
2373        uint32_t maxLayerZ;
2374        status_t result;
2375    public:
2376        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2377                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2378                uint32_t sw, uint32_t sh,
2379                uint32_t minLayerZ, uint32_t maxLayerZ)
2380            : flinger(flinger), dpy(dpy),
2381              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2382              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2383              result(PERMISSION_DENIED)
2384        {
2385        }
2386        status_t getResult() const {
2387            return result;
2388        }
2389        virtual bool handler() {
2390            Mutex::Autolock _l(flinger->mStateLock);
2391
2392            // if we have secure windows, never allow the screen capture
2393            if (flinger->mSecureFrameBuffer)
2394                return true;
2395
2396            result = flinger->captureScreenImplLocked(dpy,
2397                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2398
2399            return true;
2400        }
2401    };
2402
2403    sp<MessageBase> msg = new MessageCaptureScreen(this,
2404            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2405    status_t res = postMessageSync(msg);
2406    if (res == NO_ERROR) {
2407        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2408    }
2409    return res;
2410}
2411
2412// ---------------------------------------------------------------------------
2413
2414sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2415{
2416    sp<Layer> result;
2417    Mutex::Autolock _l(mStateLock);
2418    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2419    return result;
2420}
2421
2422// ---------------------------------------------------------------------------
2423
2424Client::Client(const sp<SurfaceFlinger>& flinger)
2425    : mFlinger(flinger), mNameGenerator(1)
2426{
2427}
2428
2429Client::~Client()
2430{
2431    const size_t count = mLayers.size();
2432    for (size_t i=0 ; i<count ; i++) {
2433        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2434        if (layer != 0) {
2435            mFlinger->removeLayer(layer);
2436        }
2437    }
2438}
2439
2440status_t Client::initCheck() const {
2441    return NO_ERROR;
2442}
2443
2444size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2445{
2446    Mutex::Autolock _l(mLock);
2447    size_t name = mNameGenerator++;
2448    mLayers.add(name, layer);
2449    return name;
2450}
2451
2452void Client::detachLayer(const LayerBaseClient* layer)
2453{
2454    Mutex::Autolock _l(mLock);
2455    // we do a linear search here, because this doesn't happen often
2456    const size_t count = mLayers.size();
2457    for (size_t i=0 ; i<count ; i++) {
2458        if (mLayers.valueAt(i) == layer) {
2459            mLayers.removeItemsAt(i, 1);
2460            break;
2461        }
2462    }
2463}
2464sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2465{
2466    Mutex::Autolock _l(mLock);
2467    sp<LayerBaseClient> lbc;
2468    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2469    if (layer != 0) {
2470        lbc = layer.promote();
2471        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2472    }
2473    return lbc;
2474}
2475
2476
2477status_t Client::onTransact(
2478    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2479{
2480    // these must be checked
2481     IPCThreadState* ipc = IPCThreadState::self();
2482     const int pid = ipc->getCallingPid();
2483     const int uid = ipc->getCallingUid();
2484     const int self_pid = getpid();
2485     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2486         // we're called from a different process, do the real check
2487         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2488         {
2489             LOGE("Permission Denial: "
2490                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2491             return PERMISSION_DENIED;
2492         }
2493     }
2494     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2495}
2496
2497
2498sp<ISurface> Client::createSurface(
2499        ISurfaceComposerClient::surface_data_t* params,
2500        const String8& name,
2501        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2502        uint32_t flags)
2503{
2504    /*
2505     * createSurface must be called from the GL thread so that it can
2506     * have access to the GL context.
2507     */
2508
2509    class MessageCreateSurface : public MessageBase {
2510        sp<ISurface> result;
2511        SurfaceFlinger* flinger;
2512        ISurfaceComposerClient::surface_data_t* params;
2513        Client* client;
2514        const String8& name;
2515        DisplayID display;
2516        uint32_t w, h;
2517        PixelFormat format;
2518        uint32_t flags;
2519    public:
2520        MessageCreateSurface(SurfaceFlinger* flinger,
2521                ISurfaceComposerClient::surface_data_t* params,
2522                const String8& name, Client* client,
2523                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2524                uint32_t flags)
2525            : flinger(flinger), params(params), client(client), name(name),
2526              display(display), w(w), h(h), format(format), flags(flags)
2527        {
2528        }
2529        sp<ISurface> getResult() const { return result; }
2530        virtual bool handler() {
2531            result = flinger->createSurface(params, name, client,
2532                    display, w, h, format, flags);
2533            return true;
2534        }
2535    };
2536
2537    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2538            params, name, this, display, w, h, format, flags);
2539    mFlinger->postMessageSync(msg);
2540    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2541}
2542status_t Client::destroySurface(SurfaceID sid) {
2543    return mFlinger->removeSurface(this, sid);
2544}
2545
2546// ---------------------------------------------------------------------------
2547
2548GraphicBufferAlloc::GraphicBufferAlloc() {}
2549
2550GraphicBufferAlloc::~GraphicBufferAlloc() {}
2551
2552sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2553        PixelFormat format, uint32_t usage, status_t* error) {
2554    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2555    status_t err = graphicBuffer->initCheck();
2556    *error = err;
2557    if (err != 0 || graphicBuffer->handle == 0) {
2558        if (err == NO_MEMORY) {
2559            GraphicBuffer::dumpAllocationsToSystemLog();
2560        }
2561        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2562             "failed (%s), handle=%p",
2563                w, h, strerror(-err), graphicBuffer->handle);
2564        return 0;
2565    }
2566    return graphicBuffer;
2567}
2568
2569// ---------------------------------------------------------------------------
2570
2571GraphicPlane::GraphicPlane()
2572    : mHw(0)
2573{
2574}
2575
2576GraphicPlane::~GraphicPlane() {
2577    delete mHw;
2578}
2579
2580bool GraphicPlane::initialized() const {
2581    return mHw ? true : false;
2582}
2583
2584int GraphicPlane::getWidth() const {
2585    return mWidth;
2586}
2587
2588int GraphicPlane::getHeight() const {
2589    return mHeight;
2590}
2591
2592void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2593{
2594    mHw = hw;
2595
2596    // initialize the display orientation transform.
2597    // it's a constant that should come from the display driver.
2598    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2599    char property[PROPERTY_VALUE_MAX];
2600    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2601        //displayOrientation
2602        switch (atoi(property)) {
2603        case 90:
2604            displayOrientation = ISurfaceComposer::eOrientation90;
2605            break;
2606        case 270:
2607            displayOrientation = ISurfaceComposer::eOrientation270;
2608            break;
2609        }
2610    }
2611
2612    const float w = hw->getWidth();
2613    const float h = hw->getHeight();
2614    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2615            &mDisplayTransform);
2616    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2617        mDisplayWidth = h;
2618        mDisplayHeight = w;
2619    } else {
2620        mDisplayWidth = w;
2621        mDisplayHeight = h;
2622    }
2623
2624    setOrientation(ISurfaceComposer::eOrientationDefault);
2625}
2626
2627status_t GraphicPlane::orientationToTransfrom(
2628        int orientation, int w, int h, Transform* tr)
2629{
2630    uint32_t flags = 0;
2631    switch (orientation) {
2632    case ISurfaceComposer::eOrientationDefault:
2633        flags = Transform::ROT_0;
2634        break;
2635    case ISurfaceComposer::eOrientation90:
2636        flags = Transform::ROT_90;
2637        break;
2638    case ISurfaceComposer::eOrientation180:
2639        flags = Transform::ROT_180;
2640        break;
2641    case ISurfaceComposer::eOrientation270:
2642        flags = Transform::ROT_270;
2643        break;
2644    default:
2645        return BAD_VALUE;
2646    }
2647    tr->set(flags, w, h);
2648    return NO_ERROR;
2649}
2650
2651status_t GraphicPlane::setOrientation(int orientation)
2652{
2653    // If the rotation can be handled in hardware, this is where
2654    // the magic should happen.
2655
2656    const DisplayHardware& hw(displayHardware());
2657    const float w = mDisplayWidth;
2658    const float h = mDisplayHeight;
2659    mWidth = int(w);
2660    mHeight = int(h);
2661
2662    Transform orientationTransform;
2663    GraphicPlane::orientationToTransfrom(orientation, w, h,
2664            &orientationTransform);
2665    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2666        mWidth = int(h);
2667        mHeight = int(w);
2668    }
2669
2670    mOrientation = orientation;
2671    mGlobalTransform = mDisplayTransform * orientationTransform;
2672    return NO_ERROR;
2673}
2674
2675const DisplayHardware& GraphicPlane::displayHardware() const {
2676    return *mHw;
2677}
2678
2679DisplayHardware& GraphicPlane::editDisplayHardware() {
2680    return *mHw;
2681}
2682
2683const Transform& GraphicPlane::transform() const {
2684    return mGlobalTransform;
2685}
2686
2687EGLDisplay GraphicPlane::getEGLDisplay() const {
2688    return mHw->getEGLDisplay();
2689}
2690
2691// ---------------------------------------------------------------------------
2692
2693}; // namespace android
2694