SurfaceFlinger.cpp revision a45836466c301d49d8df286b5317dfa99cb83b70 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35#include <binder/PermissionCache.h>
36
37#include <utils/String8.h>
38#include <utils/String16.h>
39#include <utils/StopWatch.h>
40
41#include <ui/GraphicBufferAllocator.h>
42#include <ui/GraphicLog.h>
43#include <ui/PixelFormat.h>
44
45#include <pixelflinger/pixelflinger.h>
46#include <GLES/gl.h>
47
48#include "clz.h"
49#include "GLExtensions.h"
50#include "DdmConnection.h"
51#include "Layer.h"
52#include "LayerDim.h"
53#include "SurfaceFlinger.h"
54
55#include "DisplayHardware/DisplayHardware.h"
56#include "DisplayHardware/HWComposer.h"
57
58#include <private/surfaceflinger/SharedBufferStack.h>
59
60/* ideally AID_GRAPHICS would be in a semi-public header
61 * or there would be a way to map a user/group name to its id
62 */
63#ifndef AID_GRAPHICS
64#define AID_GRAPHICS 1003
65#endif
66
67#define DISPLAY_COUNT       1
68
69namespace android {
70// ---------------------------------------------------------------------------
71
72const String16 sHardwareTest("android.permission.HARDWARE_TEST");
73const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
74const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
75const String16 sDump("android.permission.DUMP");
76
77// ---------------------------------------------------------------------------
78
79SurfaceFlinger::SurfaceFlinger()
80    :   BnSurfaceComposer(), Thread(false),
81        mTransactionFlags(0),
82        mResizeTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mDeferReleaseConsole(false),
88        mFreezeDisplay(false),
89        mElectronBeamAnimationMode(0),
90        mFreezeCount(0),
91        mFreezeDisplayTime(0),
92        mDebugRegion(0),
93        mDebugBackground(0),
94        mDebugDDMS(0),
95        mDebugDisableHWC(0),
96        mDebugDisableTransformHint(0),
97        mDebugInSwapBuffers(0),
98        mLastSwapBufferTime(0),
99        mDebugInTransaction(0),
100        mLastTransactionTime(0),
101        mBootFinished(false),
102        mConsoleSignals(0),
103        mSecureFrameBuffer(0)
104{
105    init();
106}
107
108void SurfaceFlinger::init()
109{
110    LOGI("SurfaceFlinger is starting");
111
112    // debugging stuff...
113    char value[PROPERTY_VALUE_MAX];
114
115    property_get("debug.sf.showupdates", value, "0");
116    mDebugRegion = atoi(value);
117
118    property_get("debug.sf.showbackground", value, "0");
119    mDebugBackground = atoi(value);
120
121    property_get("debug.sf.ddms", value, "0");
122    mDebugDDMS = atoi(value);
123    if (mDebugDDMS) {
124        DdmConnection::start(getServiceName());
125    }
126
127    LOGI_IF(mDebugRegion,       "showupdates enabled");
128    LOGI_IF(mDebugBackground,   "showbackground enabled");
129    LOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
130}
131
132SurfaceFlinger::~SurfaceFlinger()
133{
134    glDeleteTextures(1, &mWormholeTexName);
135}
136
137sp<IMemoryHeap> SurfaceFlinger::getCblk() const
138{
139    return mServerHeap;
140}
141
142sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
143{
144    sp<ISurfaceComposerClient> bclient;
145    sp<Client> client(new Client(this));
146    status_t err = client->initCheck();
147    if (err == NO_ERROR) {
148        bclient = client;
149    }
150    return bclient;
151}
152
153sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
154{
155    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
156    return gba;
157}
158
159const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
160{
161    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
162    const GraphicPlane& plane(mGraphicPlanes[dpy]);
163    return plane;
164}
165
166GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
167{
168    return const_cast<GraphicPlane&>(
169        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
170}
171
172void SurfaceFlinger::bootFinished()
173{
174    const nsecs_t now = systemTime();
175    const nsecs_t duration = now - mBootTime;
176    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
177    mBootFinished = true;
178
179    // wait patiently for the window manager death
180    const String16 name("window");
181    sp<IBinder> window(defaultServiceManager()->getService(name));
182    if (window != 0) {
183        window->linkToDeath(this);
184    }
185
186    // stop boot animation
187    property_set("ctl.stop", "bootanim");
188}
189
190void SurfaceFlinger::binderDied(const wp<IBinder>& who)
191{
192    // the window manager died on us. prepare its eulogy.
193
194    // unfreeze the screen in case it was... frozen
195    mFreezeDisplayTime = 0;
196    mFreezeCount = 0;
197    mFreezeDisplay = false;
198
199    // reset screen orientation
200    setOrientation(0, eOrientationDefault, 0);
201
202    // restart the boot-animation
203    property_set("ctl.start", "bootanim");
204}
205
206void SurfaceFlinger::onFirstRef()
207{
208    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
209
210    // Wait for the main thread to be done with its initialization
211    mReadyToRunBarrier.wait();
212}
213
214static inline uint16_t pack565(int r, int g, int b) {
215    return (r<<11)|(g<<5)|b;
216}
217
218status_t SurfaceFlinger::readyToRun()
219{
220    LOGI(   "SurfaceFlinger's main thread ready to run. "
221            "Initializing graphics H/W...");
222
223    // we only support one display currently
224    int dpy = 0;
225
226    {
227        // initialize the main display
228        GraphicPlane& plane(graphicPlane(dpy));
229        DisplayHardware* const hw = new DisplayHardware(this, dpy);
230        plane.setDisplayHardware(hw);
231    }
232
233    // create the shared control-block
234    mServerHeap = new MemoryHeapBase(4096,
235            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
236    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
237
238    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
239    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
240
241    new(mServerCblk) surface_flinger_cblk_t;
242
243    // initialize primary screen
244    // (other display should be initialized in the same manner, but
245    // asynchronously, as they could come and go. None of this is supported
246    // yet).
247    const GraphicPlane& plane(graphicPlane(dpy));
248    const DisplayHardware& hw = plane.displayHardware();
249    const uint32_t w = hw.getWidth();
250    const uint32_t h = hw.getHeight();
251    const uint32_t f = hw.getFormat();
252    hw.makeCurrent();
253
254    // initialize the shared control block
255    mServerCblk->connected |= 1<<dpy;
256    display_cblk_t* dcblk = mServerCblk->displays + dpy;
257    memset(dcblk, 0, sizeof(display_cblk_t));
258    dcblk->w            = plane.getWidth();
259    dcblk->h            = plane.getHeight();
260    dcblk->format       = f;
261    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
262    dcblk->xdpi         = hw.getDpiX();
263    dcblk->ydpi         = hw.getDpiY();
264    dcblk->fps          = hw.getRefreshRate();
265    dcblk->density      = hw.getDensity();
266
267    // Initialize OpenGL|ES
268    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
269    glPixelStorei(GL_PACK_ALIGNMENT, 4);
270    glEnableClientState(GL_VERTEX_ARRAY);
271    glEnable(GL_SCISSOR_TEST);
272    glShadeModel(GL_FLAT);
273    glDisable(GL_DITHER);
274    glDisable(GL_CULL_FACE);
275
276    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
277    const uint16_t g1 = pack565(0x17,0x2f,0x17);
278    const uint16_t textureData[4] = { g0, g1, g1, g0 };
279    glGenTextures(1, &mWormholeTexName);
280    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
284    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
285    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
286            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
287
288    glViewport(0, 0, w, h);
289    glMatrixMode(GL_PROJECTION);
290    glLoadIdentity();
291    // put the origin in the left-bottom corner
292    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
293
294    mReadyToRunBarrier.open();
295
296    /*
297     *  We're now ready to accept clients...
298     */
299
300    // start boot animation
301    property_set("ctl.start", "bootanim");
302
303    return NO_ERROR;
304}
305
306// ----------------------------------------------------------------------------
307#if 0
308#pragma mark -
309#pragma mark Events Handler
310#endif
311
312void SurfaceFlinger::waitForEvent()
313{
314    while (true) {
315        nsecs_t timeout = -1;
316        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
317        if (UNLIKELY(isFrozen())) {
318            // wait 5 seconds
319            const nsecs_t now = systemTime();
320            if (mFreezeDisplayTime == 0) {
321                mFreezeDisplayTime = now;
322            }
323            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
324            timeout = waitTime>0 ? waitTime : 0;
325        }
326
327        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
328
329        // see if we timed out
330        if (isFrozen()) {
331            const nsecs_t now = systemTime();
332            nsecs_t frozenTime = (now - mFreezeDisplayTime);
333            if (frozenTime >= freezeDisplayTimeout) {
334                // we timed out and are still frozen
335                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
336                        mFreezeDisplay, mFreezeCount);
337                mFreezeDisplayTime = 0;
338                mFreezeCount = 0;
339                mFreezeDisplay = false;
340            }
341        }
342
343        if (msg != 0) {
344            switch (msg->what) {
345                case MessageQueue::INVALIDATE:
346                    // invalidate message, just return to the main loop
347                    return;
348            }
349        }
350    }
351}
352
353void SurfaceFlinger::signalEvent() {
354    mEventQueue.invalidate();
355}
356
357bool SurfaceFlinger::authenticateSurfaceTexture(
358        const sp<ISurfaceTexture>& surfaceTexture) const {
359    Mutex::Autolock _l(mStateLock);
360    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
361
362    // Check the visible layer list for the ISurface
363    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
364    size_t count = currentLayers.size();
365    for (size_t i=0 ; i<count ; i++) {
366        const sp<LayerBase>& layer(currentLayers[i]);
367        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
368        if (lbc != NULL) {
369            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
370            if (lbcBinder == surfaceTextureBinder) {
371                return true;
372            }
373        }
374    }
375
376    // Check the layers in the purgatory.  This check is here so that if a
377    // SurfaceTexture gets destroyed before all the clients are done using it,
378    // the error will not be reported as "surface XYZ is not authenticated", but
379    // will instead fail later on when the client tries to use the surface,
380    // which should be reported as "surface XYZ returned an -ENODEV".  The
381    // purgatorized layers are no less authentic than the visible ones, so this
382    // should not cause any harm.
383    size_t purgatorySize =  mLayerPurgatory.size();
384    for (size_t i=0 ; i<purgatorySize ; i++) {
385        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
386        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
387        if (lbc != NULL) {
388            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
389            if (lbcBinder == surfaceTextureBinder) {
390                return true;
391            }
392        }
393    }
394
395    return false;
396}
397
398status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
399        nsecs_t reltime, uint32_t flags)
400{
401    return mEventQueue.postMessage(msg, reltime, flags);
402}
403
404status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
405        nsecs_t reltime, uint32_t flags)
406{
407    status_t res = mEventQueue.postMessage(msg, reltime, flags);
408    if (res == NO_ERROR) {
409        msg->wait();
410    }
411    return res;
412}
413
414// ----------------------------------------------------------------------------
415#if 0
416#pragma mark -
417#pragma mark Main loop
418#endif
419
420bool SurfaceFlinger::threadLoop()
421{
422    waitForEvent();
423
424    // check for transactions
425    if (UNLIKELY(mConsoleSignals)) {
426        handleConsoleEvents();
427    }
428
429    // if we're in a global transaction, don't do anything.
430    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
431    uint32_t transactionFlags = peekTransactionFlags(mask);
432    if (UNLIKELY(transactionFlags)) {
433        handleTransaction(transactionFlags);
434    }
435
436    // post surfaces (if needed)
437    handlePageFlip();
438
439    if (UNLIKELY(mHwWorkListDirty)) {
440        // build the h/w work list
441        handleWorkList();
442    }
443
444    const DisplayHardware& hw(graphicPlane(0).displayHardware());
445    if (LIKELY(hw.canDraw() && !isFrozen())) {
446        // repaint the framebuffer (if needed)
447
448        const int index = hw.getCurrentBufferIndex();
449        GraphicLog& logger(GraphicLog::getInstance());
450
451        logger.log(GraphicLog::SF_REPAINT, index);
452        handleRepaint();
453
454        // inform the h/w that we're done compositing
455        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
456        hw.compositionComplete();
457
458        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
459        postFramebuffer();
460
461        logger.log(GraphicLog::SF_REPAINT_DONE, index);
462    } else {
463        // pretend we did the post
464        hw.compositionComplete();
465        usleep(16667); // 60 fps period
466    }
467    return true;
468}
469
470void SurfaceFlinger::postFramebuffer()
471{
472    if (!mInvalidRegion.isEmpty()) {
473        const DisplayHardware& hw(graphicPlane(0).displayHardware());
474        const nsecs_t now = systemTime();
475        mDebugInSwapBuffers = now;
476        hw.flip(mInvalidRegion);
477        mLastSwapBufferTime = systemTime() - now;
478        mDebugInSwapBuffers = 0;
479        mInvalidRegion.clear();
480    }
481}
482
483void SurfaceFlinger::handleConsoleEvents()
484{
485    // something to do with the console
486    const DisplayHardware& hw = graphicPlane(0).displayHardware();
487
488    int what = android_atomic_and(0, &mConsoleSignals);
489    if (what & eConsoleAcquired) {
490        hw.acquireScreen();
491        // this is a temporary work-around, eventually this should be called
492        // by the power-manager
493        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
494    }
495
496    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
497        // We got the release signal before the acquire signal
498        mDeferReleaseConsole = false;
499        hw.releaseScreen();
500    }
501
502    if (what & eConsoleReleased) {
503        if (hw.isScreenAcquired()) {
504            hw.releaseScreen();
505        } else {
506            mDeferReleaseConsole = true;
507        }
508    }
509
510    mDirtyRegion.set(hw.bounds());
511}
512
513void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
514{
515    Mutex::Autolock _l(mStateLock);
516    const nsecs_t now = systemTime();
517    mDebugInTransaction = now;
518
519    // Here we're guaranteed that some transaction flags are set
520    // so we can call handleTransactionLocked() unconditionally.
521    // We call getTransactionFlags(), which will also clear the flags,
522    // with mStateLock held to guarantee that mCurrentState won't change
523    // until the transaction is committed.
524
525    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
526    transactionFlags = getTransactionFlags(mask);
527    handleTransactionLocked(transactionFlags);
528
529    mLastTransactionTime = systemTime() - now;
530    mDebugInTransaction = 0;
531    invalidateHwcGeometry();
532    // here the transaction has been committed
533}
534
535void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
536{
537    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
538    const size_t count = currentLayers.size();
539
540    /*
541     * Traversal of the children
542     * (perform the transaction for each of them if needed)
543     */
544
545    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
546    if (layersNeedTransaction) {
547        for (size_t i=0 ; i<count ; i++) {
548            const sp<LayerBase>& layer = currentLayers[i];
549            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
550            if (!trFlags) continue;
551
552            const uint32_t flags = layer->doTransaction(0);
553            if (flags & Layer::eVisibleRegion)
554                mVisibleRegionsDirty = true;
555        }
556    }
557
558    /*
559     * Perform our own transaction if needed
560     */
561
562    if (transactionFlags & eTransactionNeeded) {
563        if (mCurrentState.orientation != mDrawingState.orientation) {
564            // the orientation has changed, recompute all visible regions
565            // and invalidate everything.
566
567            const int dpy = 0;
568            const int orientation = mCurrentState.orientation;
569            const uint32_t type = mCurrentState.orientationType;
570            GraphicPlane& plane(graphicPlane(dpy));
571            plane.setOrientation(orientation);
572
573            // update the shared control block
574            const DisplayHardware& hw(plane.displayHardware());
575            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
576            dcblk->orientation = orientation;
577            dcblk->w = plane.getWidth();
578            dcblk->h = plane.getHeight();
579
580            mVisibleRegionsDirty = true;
581            mDirtyRegion.set(hw.bounds());
582        }
583
584        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
585            // freezing or unfreezing the display -> trigger animation if needed
586            mFreezeDisplay = mCurrentState.freezeDisplay;
587            if (mFreezeDisplay)
588                 mFreezeDisplayTime = 0;
589        }
590
591        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
592            // layers have been added
593            mVisibleRegionsDirty = true;
594        }
595
596        // some layers might have been removed, so
597        // we need to update the regions they're exposing.
598        if (mLayersRemoved) {
599            mLayersRemoved = false;
600            mVisibleRegionsDirty = true;
601            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
602            const size_t count = previousLayers.size();
603            for (size_t i=0 ; i<count ; i++) {
604                const sp<LayerBase>& layer(previousLayers[i]);
605                if (currentLayers.indexOf( layer ) < 0) {
606                    // this layer is not visible anymore
607                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
608                }
609            }
610        }
611    }
612
613    commitTransaction();
614}
615
616sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
617{
618    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
619}
620
621void SurfaceFlinger::computeVisibleRegions(
622    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
623{
624    const GraphicPlane& plane(graphicPlane(0));
625    const Transform& planeTransform(plane.transform());
626    const DisplayHardware& hw(plane.displayHardware());
627    const Region screenRegion(hw.bounds());
628
629    Region aboveOpaqueLayers;
630    Region aboveCoveredLayers;
631    Region dirty;
632
633    bool secureFrameBuffer = false;
634
635    size_t i = currentLayers.size();
636    while (i--) {
637        const sp<LayerBase>& layer = currentLayers[i];
638        layer->validateVisibility(planeTransform);
639
640        // start with the whole surface at its current location
641        const Layer::State& s(layer->drawingState());
642
643        /*
644         * opaqueRegion: area of a surface that is fully opaque.
645         */
646        Region opaqueRegion;
647
648        /*
649         * visibleRegion: area of a surface that is visible on screen
650         * and not fully transparent. This is essentially the layer's
651         * footprint minus the opaque regions above it.
652         * Areas covered by a translucent surface are considered visible.
653         */
654        Region visibleRegion;
655
656        /*
657         * coveredRegion: area of a surface that is covered by all
658         * visible regions above it (which includes the translucent areas).
659         */
660        Region coveredRegion;
661
662
663        // handle hidden surfaces by setting the visible region to empty
664        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
665            const bool translucent = !layer->isOpaque();
666            const Rect bounds(layer->visibleBounds());
667            visibleRegion.set(bounds);
668            visibleRegion.andSelf(screenRegion);
669            if (!visibleRegion.isEmpty()) {
670                // Remove the transparent area from the visible region
671                if (translucent) {
672                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
673                }
674
675                // compute the opaque region
676                const int32_t layerOrientation = layer->getOrientation();
677                if (s.alpha==255 && !translucent &&
678                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
679                    // the opaque region is the layer's footprint
680                    opaqueRegion = visibleRegion;
681                }
682            }
683        }
684
685        // Clip the covered region to the visible region
686        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
687
688        // Update aboveCoveredLayers for next (lower) layer
689        aboveCoveredLayers.orSelf(visibleRegion);
690
691        // subtract the opaque region covered by the layers above us
692        visibleRegion.subtractSelf(aboveOpaqueLayers);
693
694        // compute this layer's dirty region
695        if (layer->contentDirty) {
696            // we need to invalidate the whole region
697            dirty = visibleRegion;
698            // as well, as the old visible region
699            dirty.orSelf(layer->visibleRegionScreen);
700            layer->contentDirty = false;
701        } else {
702            /* compute the exposed region:
703             *   the exposed region consists of two components:
704             *   1) what's VISIBLE now and was COVERED before
705             *   2) what's EXPOSED now less what was EXPOSED before
706             *
707             * note that (1) is conservative, we start with the whole
708             * visible region but only keep what used to be covered by
709             * something -- which mean it may have been exposed.
710             *
711             * (2) handles areas that were not covered by anything but got
712             * exposed because of a resize.
713             */
714            const Region newExposed = visibleRegion - coveredRegion;
715            const Region oldVisibleRegion = layer->visibleRegionScreen;
716            const Region oldCoveredRegion = layer->coveredRegionScreen;
717            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
718            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
719        }
720        dirty.subtractSelf(aboveOpaqueLayers);
721
722        // accumulate to the screen dirty region
723        dirtyRegion.orSelf(dirty);
724
725        // Update aboveOpaqueLayers for next (lower) layer
726        aboveOpaqueLayers.orSelf(opaqueRegion);
727
728        // Store the visible region is screen space
729        layer->setVisibleRegion(visibleRegion);
730        layer->setCoveredRegion(coveredRegion);
731
732        // If a secure layer is partially visible, lock-down the screen!
733        if (layer->isSecure() && !visibleRegion.isEmpty()) {
734            secureFrameBuffer = true;
735        }
736    }
737
738    // invalidate the areas where a layer was removed
739    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
740    mDirtyRegionRemovedLayer.clear();
741
742    mSecureFrameBuffer = secureFrameBuffer;
743    opaqueRegion = aboveOpaqueLayers;
744}
745
746
747void SurfaceFlinger::commitTransaction()
748{
749    mDrawingState = mCurrentState;
750    mResizeTransationPending = false;
751    mTransactionCV.broadcast();
752}
753
754void SurfaceFlinger::handlePageFlip()
755{
756    bool visibleRegions = mVisibleRegionsDirty;
757    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
758    visibleRegions |= lockPageFlip(currentLayers);
759
760        const DisplayHardware& hw = graphicPlane(0).displayHardware();
761        const Region screenRegion(hw.bounds());
762        if (visibleRegions) {
763            Region opaqueRegion;
764            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
765
766            /*
767             *  rebuild the visible layer list
768             */
769            const size_t count = currentLayers.size();
770            mVisibleLayersSortedByZ.clear();
771            mVisibleLayersSortedByZ.setCapacity(count);
772            for (size_t i=0 ; i<count ; i++) {
773                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
774                    mVisibleLayersSortedByZ.add(currentLayers[i]);
775            }
776
777            mWormholeRegion = screenRegion.subtract(opaqueRegion);
778            mVisibleRegionsDirty = false;
779            invalidateHwcGeometry();
780        }
781
782    unlockPageFlip(currentLayers);
783    mDirtyRegion.andSelf(screenRegion);
784}
785
786void SurfaceFlinger::invalidateHwcGeometry()
787{
788    mHwWorkListDirty = true;
789}
790
791bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
792{
793    bool recomputeVisibleRegions = false;
794    size_t count = currentLayers.size();
795    sp<LayerBase> const* layers = currentLayers.array();
796    for (size_t i=0 ; i<count ; i++) {
797        const sp<LayerBase>& layer(layers[i]);
798        layer->lockPageFlip(recomputeVisibleRegions);
799    }
800    return recomputeVisibleRegions;
801}
802
803void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
804{
805    const GraphicPlane& plane(graphicPlane(0));
806    const Transform& planeTransform(plane.transform());
807    size_t count = currentLayers.size();
808    sp<LayerBase> const* layers = currentLayers.array();
809    for (size_t i=0 ; i<count ; i++) {
810        const sp<LayerBase>& layer(layers[i]);
811        layer->unlockPageFlip(planeTransform, mDirtyRegion);
812    }
813}
814
815void SurfaceFlinger::handleWorkList()
816{
817    mHwWorkListDirty = false;
818    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
819    if (hwc.initCheck() == NO_ERROR) {
820        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
821        const size_t count = currentLayers.size();
822        hwc.createWorkList(count);
823        hwc_layer_t* const cur(hwc.getLayers());
824        for (size_t i=0 ; cur && i<count ; i++) {
825            currentLayers[i]->setGeometry(&cur[i]);
826            if (mDebugDisableHWC || mDebugRegion) {
827                cur[i].compositionType = HWC_FRAMEBUFFER;
828                cur[i].flags |= HWC_SKIP_LAYER;
829            }
830        }
831    }
832}
833
834void SurfaceFlinger::handleRepaint()
835{
836    // compute the invalid region
837    mInvalidRegion.orSelf(mDirtyRegion);
838
839    if (UNLIKELY(mDebugRegion)) {
840        debugFlashRegions();
841    }
842
843    // set the frame buffer
844    const DisplayHardware& hw(graphicPlane(0).displayHardware());
845    glMatrixMode(GL_MODELVIEW);
846    glLoadIdentity();
847
848    uint32_t flags = hw.getFlags();
849    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
850        (flags & DisplayHardware::BUFFER_PRESERVED))
851    {
852        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
853        // takes a rectangle, we must make sure to update that whole
854        // rectangle in that case
855        if (flags & DisplayHardware::SWAP_RECTANGLE) {
856            // TODO: we really should be able to pass a region to
857            // SWAP_RECTANGLE so that we don't have to redraw all this.
858            mDirtyRegion.set(mInvalidRegion.bounds());
859        } else {
860            // in the BUFFER_PRESERVED case, obviously, we can update only
861            // what's needed and nothing more.
862            // NOTE: this is NOT a common case, as preserving the backbuffer
863            // is costly and usually involves copying the whole update back.
864        }
865    } else {
866        if (flags & DisplayHardware::PARTIAL_UPDATES) {
867            // We need to redraw the rectangle that will be updated
868            // (pushed to the framebuffer).
869            // This is needed because PARTIAL_UPDATES only takes one
870            // rectangle instead of a region (see DisplayHardware::flip())
871            mDirtyRegion.set(mInvalidRegion.bounds());
872        } else {
873            // we need to redraw everything (the whole screen)
874            mDirtyRegion.set(hw.bounds());
875            mInvalidRegion = mDirtyRegion;
876        }
877    }
878
879    // compose all surfaces
880    composeSurfaces(mDirtyRegion);
881
882    // clear the dirty regions
883    mDirtyRegion.clear();
884}
885
886void SurfaceFlinger::composeSurfaces(const Region& dirty)
887{
888    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
889        // should never happen unless the window manager has a bug
890        // draw something...
891        drawWormhole();
892    }
893
894    status_t err = NO_ERROR;
895    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
896    size_t count = layers.size();
897
898    const DisplayHardware& hw(graphicPlane(0).displayHardware());
899    HWComposer& hwc(hw.getHwComposer());
900    hwc_layer_t* const cur(hwc.getLayers());
901
902    LOGE_IF(cur && hwc.getNumLayers() != count,
903            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
904            hwc.getNumLayers(), count);
905
906    // just to be extra-safe, use the smallest count
907    if (hwc.initCheck() == NO_ERROR) {
908        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
909    }
910
911    /*
912     *  update the per-frame h/w composer data for each layer
913     *  and build the transparent region of the FB
914     */
915    Region transparent;
916    if (cur) {
917        for (size_t i=0 ; i<count ; i++) {
918            const sp<LayerBase>& layer(layers[i]);
919            layer->setPerFrameData(&cur[i]);
920        }
921        err = hwc.prepare();
922        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
923
924        if (err == NO_ERROR) {
925            for (size_t i=0 ; i<count ; i++) {
926                if (cur[i].hints & HWC_HINT_CLEAR_FB) {
927                    const sp<LayerBase>& layer(layers[i]);
928                    if (layer->isOpaque()) {
929                        transparent.orSelf(layer->visibleRegionScreen);
930                    }
931                }
932            }
933
934            /*
935             *  clear the area of the FB that need to be transparent
936             */
937            transparent.andSelf(dirty);
938            if (!transparent.isEmpty()) {
939                glClearColor(0,0,0,0);
940                Region::const_iterator it = transparent.begin();
941                Region::const_iterator const end = transparent.end();
942                const int32_t height = hw.getHeight();
943                while (it != end) {
944                    const Rect& r(*it++);
945                    const GLint sy = height - (r.top + r.height());
946                    glScissor(r.left, sy, r.width(), r.height());
947                    glClear(GL_COLOR_BUFFER_BIT);
948                }
949            }
950        }
951    }
952
953
954    /*
955     * and then, render the layers targeted at the framebuffer
956     */
957    for (size_t i=0 ; i<count ; i++) {
958        if (cur) {
959            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
960                !(cur[i].flags & HWC_SKIP_LAYER)) {
961                // skip layers handled by the HAL
962                continue;
963            }
964        }
965
966        const sp<LayerBase>& layer(layers[i]);
967        const Region clip(dirty.intersect(layer->visibleRegionScreen));
968        if (!clip.isEmpty()) {
969            layer->draw(clip);
970        }
971    }
972}
973
974void SurfaceFlinger::debugFlashRegions()
975{
976    const DisplayHardware& hw(graphicPlane(0).displayHardware());
977    const uint32_t flags = hw.getFlags();
978    const int32_t height = hw.getHeight();
979    if (mInvalidRegion.isEmpty()) {
980        return;
981    }
982
983    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
984            (flags & DisplayHardware::BUFFER_PRESERVED))) {
985        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
986                mDirtyRegion.bounds() : hw.bounds());
987        composeSurfaces(repaint);
988    }
989
990    glDisable(GL_BLEND);
991    glDisable(GL_DITHER);
992    glDisable(GL_SCISSOR_TEST);
993
994    static int toggle = 0;
995    toggle = 1 - toggle;
996    if (toggle) {
997        glColor4f(1, 0, 1, 1);
998    } else {
999        glColor4f(1, 1, 0, 1);
1000    }
1001
1002    Region::const_iterator it = mDirtyRegion.begin();
1003    Region::const_iterator const end = mDirtyRegion.end();
1004    while (it != end) {
1005        const Rect& r = *it++;
1006        GLfloat vertices[][2] = {
1007                { r.left,  height - r.top },
1008                { r.left,  height - r.bottom },
1009                { r.right, height - r.bottom },
1010                { r.right, height - r.top }
1011        };
1012        glVertexPointer(2, GL_FLOAT, 0, vertices);
1013        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1014    }
1015
1016    hw.flip(mInvalidRegion);
1017
1018    if (mDebugRegion > 1)
1019        usleep(mDebugRegion * 1000);
1020
1021    glEnable(GL_SCISSOR_TEST);
1022}
1023
1024void SurfaceFlinger::drawWormhole() const
1025{
1026    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1027    if (region.isEmpty())
1028        return;
1029
1030    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1031    const int32_t width = hw.getWidth();
1032    const int32_t height = hw.getHeight();
1033
1034    glDisable(GL_BLEND);
1035    glDisable(GL_DITHER);
1036
1037    if (LIKELY(!mDebugBackground)) {
1038        glClearColor(0,0,0,0);
1039        Region::const_iterator it = region.begin();
1040        Region::const_iterator const end = region.end();
1041        while (it != end) {
1042            const Rect& r = *it++;
1043            const GLint sy = height - (r.top + r.height());
1044            glScissor(r.left, sy, r.width(), r.height());
1045            glClear(GL_COLOR_BUFFER_BIT);
1046        }
1047    } else {
1048        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1049                { width, height }, { 0, height }  };
1050        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1051        glVertexPointer(2, GL_SHORT, 0, vertices);
1052        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1053        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1054#if defined(GL_OES_EGL_image_external)
1055        if (GLExtensions::getInstance().haveTextureExternal()) {
1056            glDisable(GL_TEXTURE_EXTERNAL_OES);
1057        }
1058#endif
1059        glEnable(GL_TEXTURE_2D);
1060        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1061        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1062        glMatrixMode(GL_TEXTURE);
1063        glLoadIdentity();
1064        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1065        Region::const_iterator it = region.begin();
1066        Region::const_iterator const end = region.end();
1067        while (it != end) {
1068            const Rect& r = *it++;
1069            const GLint sy = height - (r.top + r.height());
1070            glScissor(r.left, sy, r.width(), r.height());
1071            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1072        }
1073        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1074        glDisable(GL_TEXTURE_2D);
1075        glLoadIdentity();
1076        glMatrixMode(GL_MODELVIEW);
1077    }
1078}
1079
1080void SurfaceFlinger::debugShowFPS() const
1081{
1082    static int mFrameCount;
1083    static int mLastFrameCount = 0;
1084    static nsecs_t mLastFpsTime = 0;
1085    static float mFps = 0;
1086    mFrameCount++;
1087    nsecs_t now = systemTime();
1088    nsecs_t diff = now - mLastFpsTime;
1089    if (diff > ms2ns(250)) {
1090        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1091        mLastFpsTime = now;
1092        mLastFrameCount = mFrameCount;
1093    }
1094    // XXX: mFPS has the value we want
1095 }
1096
1097status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1098{
1099    Mutex::Autolock _l(mStateLock);
1100    addLayer_l(layer);
1101    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1102    return NO_ERROR;
1103}
1104
1105status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1106{
1107    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1108    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1109}
1110
1111ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1112        const sp<LayerBaseClient>& lbc)
1113{
1114    // attach this layer to the client
1115    size_t name = client->attachLayer(lbc);
1116
1117    Mutex::Autolock _l(mStateLock);
1118
1119    // add this layer to the current state list
1120    addLayer_l(lbc);
1121
1122    return ssize_t(name);
1123}
1124
1125status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1126{
1127    Mutex::Autolock _l(mStateLock);
1128    status_t err = purgatorizeLayer_l(layer);
1129    if (err == NO_ERROR)
1130        setTransactionFlags(eTransactionNeeded);
1131    return err;
1132}
1133
1134status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1135{
1136    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1137    if (lbc != 0) {
1138        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1139    }
1140    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1141    if (index >= 0) {
1142        mLayersRemoved = true;
1143        return NO_ERROR;
1144    }
1145    return status_t(index);
1146}
1147
1148status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1149{
1150    // First add the layer to the purgatory list, which makes sure it won't
1151    // go away, then remove it from the main list (through a transaction).
1152    ssize_t err = removeLayer_l(layerBase);
1153    if (err >= 0) {
1154        mLayerPurgatory.add(layerBase);
1155    }
1156
1157    layerBase->onRemoved();
1158
1159    // it's possible that we don't find a layer, because it might
1160    // have been destroyed already -- this is not technically an error
1161    // from the user because there is a race between Client::destroySurface(),
1162    // ~Client() and ~ISurface().
1163    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1164}
1165
1166status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1167{
1168    layer->forceVisibilityTransaction();
1169    setTransactionFlags(eTraversalNeeded);
1170    return NO_ERROR;
1171}
1172
1173uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1174{
1175    return android_atomic_release_load(&mTransactionFlags);
1176}
1177
1178uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1179{
1180    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1181}
1182
1183uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1184{
1185    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1186    if ((old & flags)==0) { // wake the server up
1187        signalEvent();
1188    }
1189    return old;
1190}
1191
1192
1193void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state) {
1194    Mutex::Autolock _l(mStateLock);
1195
1196    uint32_t flags = 0;
1197    const size_t count = state.size();
1198    for (size_t i=0 ; i<count ; i++) {
1199        const ComposerState& s(state[i]);
1200        sp<Client> client( static_cast<Client *>(s.client.get()) );
1201        flags |= setClientStateLocked(client, s.state);
1202    }
1203    if (flags) {
1204        setTransactionFlags(flags);
1205    }
1206
1207    signalEvent();
1208
1209    // if there is a transaction with a resize, wait for it to
1210    // take effect before returning.
1211    while (mResizeTransationPending) {
1212        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1213        if (CC_UNLIKELY(err != NO_ERROR)) {
1214            // just in case something goes wrong in SF, return to the
1215            // called after a few seconds.
1216            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1217            mResizeTransationPending = false;
1218            break;
1219        }
1220    }
1221}
1222
1223status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1224{
1225    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1226        return BAD_VALUE;
1227
1228    Mutex::Autolock _l(mStateLock);
1229    mCurrentState.freezeDisplay = 1;
1230    setTransactionFlags(eTransactionNeeded);
1231
1232    // flags is intended to communicate some sort of animation behavior
1233    // (for instance fading)
1234    return NO_ERROR;
1235}
1236
1237status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1238{
1239    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1240        return BAD_VALUE;
1241
1242    Mutex::Autolock _l(mStateLock);
1243    mCurrentState.freezeDisplay = 0;
1244    setTransactionFlags(eTransactionNeeded);
1245
1246    // flags is intended to communicate some sort of animation behavior
1247    // (for instance fading)
1248    return NO_ERROR;
1249}
1250
1251int SurfaceFlinger::setOrientation(DisplayID dpy,
1252        int orientation, uint32_t flags)
1253{
1254    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1255        return BAD_VALUE;
1256
1257    Mutex::Autolock _l(mStateLock);
1258    if (mCurrentState.orientation != orientation) {
1259        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1260            mCurrentState.orientationType = flags;
1261            mCurrentState.orientation = orientation;
1262            setTransactionFlags(eTransactionNeeded);
1263            mTransactionCV.wait(mStateLock);
1264        } else {
1265            orientation = BAD_VALUE;
1266        }
1267    }
1268    return orientation;
1269}
1270
1271sp<ISurface> SurfaceFlinger::createSurface(
1272        ISurfaceComposerClient::surface_data_t* params,
1273        const String8& name,
1274        const sp<Client>& client,
1275        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1276        uint32_t flags)
1277{
1278    sp<LayerBaseClient> layer;
1279    sp<ISurface> surfaceHandle;
1280
1281    if (int32_t(w|h) < 0) {
1282        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1283                int(w), int(h));
1284        return surfaceHandle;
1285    }
1286
1287    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1288    sp<Layer> normalLayer;
1289    switch (flags & eFXSurfaceMask) {
1290        case eFXSurfaceNormal:
1291            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1292            layer = normalLayer;
1293            break;
1294        case eFXSurfaceBlur:
1295            // for now we treat Blur as Dim, until we can implement it
1296            // efficiently.
1297        case eFXSurfaceDim:
1298            layer = createDimSurface(client, d, w, h, flags);
1299            break;
1300    }
1301
1302    if (layer != 0) {
1303        layer->initStates(w, h, flags);
1304        layer->setName(name);
1305        ssize_t token = addClientLayer(client, layer);
1306
1307        surfaceHandle = layer->getSurface();
1308        if (surfaceHandle != 0) {
1309            params->token = token;
1310            params->identity = layer->getIdentity();
1311            if (normalLayer != 0) {
1312                Mutex::Autolock _l(mStateLock);
1313                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1314            }
1315        }
1316
1317        setTransactionFlags(eTransactionNeeded);
1318    }
1319
1320    return surfaceHandle;
1321}
1322
1323sp<Layer> SurfaceFlinger::createNormalSurface(
1324        const sp<Client>& client, DisplayID display,
1325        uint32_t w, uint32_t h, uint32_t flags,
1326        PixelFormat& format)
1327{
1328    // initialize the surfaces
1329    switch (format) { // TODO: take h/w into account
1330    case PIXEL_FORMAT_TRANSPARENT:
1331    case PIXEL_FORMAT_TRANSLUCENT:
1332        format = PIXEL_FORMAT_RGBA_8888;
1333        break;
1334    case PIXEL_FORMAT_OPAQUE:
1335#ifdef NO_RGBX_8888
1336        format = PIXEL_FORMAT_RGB_565;
1337#else
1338        format = PIXEL_FORMAT_RGBX_8888;
1339#endif
1340        break;
1341    }
1342
1343#ifdef NO_RGBX_8888
1344    if (format == PIXEL_FORMAT_RGBX_8888)
1345        format = PIXEL_FORMAT_RGBA_8888;
1346#endif
1347
1348    sp<Layer> layer = new Layer(this, display, client);
1349    status_t err = layer->setBuffers(w, h, format, flags);
1350    if (LIKELY(err != NO_ERROR)) {
1351        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1352        layer.clear();
1353    }
1354    return layer;
1355}
1356
1357sp<LayerDim> SurfaceFlinger::createDimSurface(
1358        const sp<Client>& client, DisplayID display,
1359        uint32_t w, uint32_t h, uint32_t flags)
1360{
1361    sp<LayerDim> layer = new LayerDim(this, display, client);
1362    layer->initStates(w, h, flags);
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                mResizeTransationPending = true;
1437            }
1438        }
1439        if (what & eAlphaChanged) {
1440            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1441                flags |= eTraversalNeeded;
1442        }
1443        if (what & eMatrixChanged) {
1444            if (layer->setMatrix(s.matrix))
1445                flags |= eTraversalNeeded;
1446        }
1447        if (what & eTransparentRegionChanged) {
1448            if (layer->setTransparentRegionHint(s.transparentRegion))
1449                flags |= eTraversalNeeded;
1450        }
1451        if (what & eVisibilityChanged) {
1452            if (layer->setFlags(s.flags, s.mask))
1453                flags |= eTraversalNeeded;
1454        }
1455    }
1456    return flags;
1457}
1458
1459void SurfaceFlinger::screenReleased(int dpy)
1460{
1461    // this may be called by a signal handler, we can't do too much in here
1462    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1463    signalEvent();
1464}
1465
1466void SurfaceFlinger::screenAcquired(int dpy)
1467{
1468    // this may be called by a signal handler, we can't do too much in here
1469    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1470    signalEvent();
1471}
1472
1473status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1474{
1475    const size_t SIZE = 4096;
1476    char buffer[SIZE];
1477    String8 result;
1478
1479    if (!PermissionCache::checkCallingPermission(sDump)) {
1480        snprintf(buffer, SIZE, "Permission Denial: "
1481                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1482                IPCThreadState::self()->getCallingPid(),
1483                IPCThreadState::self()->getCallingUid());
1484        result.append(buffer);
1485    } else {
1486
1487        // figure out if we're stuck somewhere
1488        const nsecs_t now = systemTime();
1489        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1490        const nsecs_t inTransaction(mDebugInTransaction);
1491        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1492        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1493
1494        // Try to get the main lock, but don't insist if we can't
1495        // (this would indicate SF is stuck, but we want to be able to
1496        // print something in dumpsys).
1497        int retry = 3;
1498        while (mStateLock.tryLock()<0 && --retry>=0) {
1499            usleep(1000000);
1500        }
1501        const bool locked(retry >= 0);
1502        if (!locked) {
1503            snprintf(buffer, SIZE,
1504                    "SurfaceFlinger appears to be unresponsive, "
1505                    "dumping anyways (no locks held)\n");
1506            result.append(buffer);
1507        }
1508
1509        /*
1510         * Dump the visible layer list
1511         */
1512        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1513        const size_t count = currentLayers.size();
1514        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1515        result.append(buffer);
1516        for (size_t i=0 ; i<count ; i++) {
1517            const sp<LayerBase>& layer(currentLayers[i]);
1518            layer->dump(result, buffer, SIZE);
1519            const Layer::State& s(layer->drawingState());
1520            s.transparentRegion.dump(result, "transparentRegion");
1521            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1522            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1523        }
1524
1525        /*
1526         * Dump the layers in the purgatory
1527         */
1528
1529        const size_t purgatorySize =  mLayerPurgatory.size();
1530        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1531        result.append(buffer);
1532        for (size_t i=0 ; i<purgatorySize ; i++) {
1533            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1534            layer->shortDump(result, buffer, SIZE);
1535        }
1536
1537        /*
1538         * Dump SurfaceFlinger global state
1539         */
1540
1541        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1542        result.append(buffer);
1543
1544        const GLExtensions& extensions(GLExtensions::getInstance());
1545        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1546                extensions.getVendor(),
1547                extensions.getRenderer(),
1548                extensions.getVersion());
1549        result.append(buffer);
1550        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1551        result.append(buffer);
1552
1553        mWormholeRegion.dump(result, "WormholeRegion");
1554        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1555        snprintf(buffer, SIZE,
1556                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1557                mFreezeDisplay?"yes":"no", mFreezeCount,
1558                mCurrentState.orientation, hw.canDraw());
1559        result.append(buffer);
1560        snprintf(buffer, SIZE,
1561                "  last eglSwapBuffers() time: %f us\n"
1562                "  last transaction time     : %f us\n",
1563                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1564        result.append(buffer);
1565
1566        if (inSwapBuffersDuration || !locked) {
1567            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1568                    inSwapBuffersDuration/1000.0);
1569            result.append(buffer);
1570        }
1571
1572        if (inTransactionDuration || !locked) {
1573            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1574                    inTransactionDuration/1000.0);
1575            result.append(buffer);
1576        }
1577
1578        /*
1579         * Dump HWComposer state
1580         */
1581        HWComposer& hwc(hw.getHwComposer());
1582        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1583                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1584                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1585        result.append(buffer);
1586        hwc.dump(result, buffer, SIZE);
1587
1588        /*
1589         * Dump gralloc state
1590         */
1591        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1592        alloc.dump(result);
1593        hw.dump(result);
1594
1595        if (locked) {
1596            mStateLock.unlock();
1597        }
1598    }
1599    write(fd, result.string(), result.size());
1600    return NO_ERROR;
1601}
1602
1603status_t SurfaceFlinger::onTransact(
1604    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1605{
1606    switch (code) {
1607        case CREATE_CONNECTION:
1608        case SET_TRANSACTION_STATE:
1609        case SET_ORIENTATION:
1610        case FREEZE_DISPLAY:
1611        case UNFREEZE_DISPLAY:
1612        case BOOT_FINISHED:
1613        case TURN_ELECTRON_BEAM_OFF:
1614        case TURN_ELECTRON_BEAM_ON:
1615        {
1616            // codes that require permission check
1617            IPCThreadState* ipc = IPCThreadState::self();
1618            const int pid = ipc->getCallingPid();
1619            const int uid = ipc->getCallingUid();
1620            if ((uid != AID_GRAPHICS) &&
1621                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1622                LOGE("Permission Denial: "
1623                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1624                return PERMISSION_DENIED;
1625            }
1626            break;
1627        }
1628        case CAPTURE_SCREEN:
1629        {
1630            // codes that require permission check
1631            IPCThreadState* ipc = IPCThreadState::self();
1632            const int pid = ipc->getCallingPid();
1633            const int uid = ipc->getCallingUid();
1634            if ((uid != AID_GRAPHICS) &&
1635                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1636                LOGE("Permission Denial: "
1637                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1638                return PERMISSION_DENIED;
1639            }
1640            break;
1641        }
1642    }
1643
1644    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1645    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1646        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1647        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1648            IPCThreadState* ipc = IPCThreadState::self();
1649            const int pid = ipc->getCallingPid();
1650            const int uid = ipc->getCallingUid();
1651            LOGE("Permission Denial: "
1652                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1653            return PERMISSION_DENIED;
1654        }
1655        int n;
1656        switch (code) {
1657            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1658            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1659                return NO_ERROR;
1660            case 1002:  // SHOW_UPDATES
1661                n = data.readInt32();
1662                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1663                invalidateHwcGeometry();
1664                repaintEverything();
1665                return NO_ERROR;
1666            case 1003:  // SHOW_BACKGROUND
1667                n = data.readInt32();
1668                mDebugBackground = n ? 1 : 0;
1669                return NO_ERROR;
1670            case 1004:{ // repaint everything
1671                repaintEverything();
1672                return NO_ERROR;
1673            }
1674            case 1005:{ // force transaction
1675                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1676                return NO_ERROR;
1677            }
1678            case 1006:{ // enable/disable GraphicLog
1679                int enabled = data.readInt32();
1680                GraphicLog::getInstance().setEnabled(enabled);
1681                return NO_ERROR;
1682            }
1683            case 1007: // set mFreezeCount
1684                mFreezeCount = data.readInt32();
1685                mFreezeDisplayTime = 0;
1686                return NO_ERROR;
1687            case 1008:  // toggle use of hw composer
1688                n = data.readInt32();
1689                mDebugDisableHWC = n ? 1 : 0;
1690                invalidateHwcGeometry();
1691                repaintEverything();
1692                return NO_ERROR;
1693            case 1009:  // toggle use of transform hint
1694                n = data.readInt32();
1695                mDebugDisableTransformHint = n ? 1 : 0;
1696                invalidateHwcGeometry();
1697                repaintEverything();
1698                return NO_ERROR;
1699            case 1010:  // interrogate.
1700                reply->writeInt32(0);
1701                reply->writeInt32(0);
1702                reply->writeInt32(mDebugRegion);
1703                reply->writeInt32(mDebugBackground);
1704                return NO_ERROR;
1705            case 1013: {
1706                Mutex::Autolock _l(mStateLock);
1707                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1708                reply->writeInt32(hw.getPageFlipCount());
1709            }
1710            return NO_ERROR;
1711        }
1712    }
1713    return err;
1714}
1715
1716void SurfaceFlinger::repaintEverything() {
1717    Mutex::Autolock _l(mStateLock);
1718    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1719    mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1720    signalEvent();
1721}
1722
1723// ---------------------------------------------------------------------------
1724
1725status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1726        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1727{
1728    if (!GLExtensions::getInstance().haveFramebufferObject())
1729        return INVALID_OPERATION;
1730
1731    // get screen geometry
1732    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1733    const uint32_t hw_w = hw.getWidth();
1734    const uint32_t hw_h = hw.getHeight();
1735    GLfloat u = 1;
1736    GLfloat v = 1;
1737
1738    // make sure to clear all GL error flags
1739    while ( glGetError() != GL_NO_ERROR ) ;
1740
1741    // create a FBO
1742    GLuint name, tname;
1743    glGenTextures(1, &tname);
1744    glBindTexture(GL_TEXTURE_2D, tname);
1745    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1746            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1747    if (glGetError() != GL_NO_ERROR) {
1748        while ( glGetError() != GL_NO_ERROR ) ;
1749        GLint tw = (2 << (31 - clz(hw_w)));
1750        GLint th = (2 << (31 - clz(hw_h)));
1751        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1752                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1753        u = GLfloat(hw_w) / tw;
1754        v = GLfloat(hw_h) / th;
1755    }
1756    glGenFramebuffersOES(1, &name);
1757    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1758    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1759            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1760
1761    // redraw the screen entirely...
1762    glClearColor(0,0,0,1);
1763    glClear(GL_COLOR_BUFFER_BIT);
1764    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1765    const size_t count = layers.size();
1766    for (size_t i=0 ; i<count ; ++i) {
1767        const sp<LayerBase>& layer(layers[i]);
1768        layer->drawForSreenShot();
1769    }
1770
1771    // back to main framebuffer
1772    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1773    glDisable(GL_SCISSOR_TEST);
1774    glDeleteFramebuffersOES(1, &name);
1775
1776    *textureName = tname;
1777    *uOut = u;
1778    *vOut = v;
1779    return NO_ERROR;
1780}
1781
1782// ---------------------------------------------------------------------------
1783
1784status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1785{
1786    status_t result = PERMISSION_DENIED;
1787
1788    if (!GLExtensions::getInstance().haveFramebufferObject())
1789        return INVALID_OPERATION;
1790
1791    // get screen geometry
1792    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1793    const uint32_t hw_w = hw.getWidth();
1794    const uint32_t hw_h = hw.getHeight();
1795    const Region screenBounds(hw.bounds());
1796
1797    GLfloat u, v;
1798    GLuint tname;
1799    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1800    if (result != NO_ERROR) {
1801        return result;
1802    }
1803
1804    GLfloat vtx[8];
1805    const GLfloat texCoords[4][2] = { {0,1}, {0,1-v}, {u,1-v}, {u,1} };
1806    glBindTexture(GL_TEXTURE_2D, tname);
1807    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1808    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1809    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1810    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1811    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1812    glVertexPointer(2, GL_FLOAT, 0, vtx);
1813
1814    /*
1815     * Texture coordinate mapping
1816     *
1817     *                 u
1818     *    1 +----------+---+
1819     *      |     |    |   |  image is inverted
1820     *      |     V    |   |  w.r.t. the texture
1821     *  1-v +----------+   |  coordinates
1822     *      |              |
1823     *      |              |
1824     *      |              |
1825     *    0 +--------------+
1826     *      0              1
1827     *
1828     */
1829
1830    class s_curve_interpolator {
1831        const float nbFrames, s, v;
1832    public:
1833        s_curve_interpolator(int nbFrames, float s)
1834        : nbFrames(1.0f / (nbFrames-1)), s(s),
1835          v(1.0f + expf(-s + 0.5f*s)) {
1836        }
1837        float operator()(int f) {
1838            const float x = f * nbFrames;
1839            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1840        }
1841    };
1842
1843    class v_stretch {
1844        const GLfloat hw_w, hw_h;
1845    public:
1846        v_stretch(uint32_t hw_w, uint32_t hw_h)
1847        : hw_w(hw_w), hw_h(hw_h) {
1848        }
1849        void operator()(GLfloat* vtx, float v) {
1850            const GLfloat w = hw_w + (hw_w * v);
1851            const GLfloat h = hw_h - (hw_h * v);
1852            const GLfloat x = (hw_w - w) * 0.5f;
1853            const GLfloat y = (hw_h - h) * 0.5f;
1854            vtx[0] = x;         vtx[1] = y;
1855            vtx[2] = x;         vtx[3] = y + h;
1856            vtx[4] = x + w;     vtx[5] = y + h;
1857            vtx[6] = x + w;     vtx[7] = y;
1858        }
1859    };
1860
1861    class h_stretch {
1862        const GLfloat hw_w, hw_h;
1863    public:
1864        h_stretch(uint32_t hw_w, uint32_t hw_h)
1865        : hw_w(hw_w), hw_h(hw_h) {
1866        }
1867        void operator()(GLfloat* vtx, float v) {
1868            const GLfloat w = hw_w - (hw_w * v);
1869            const GLfloat h = 1.0f;
1870            const GLfloat x = (hw_w - w) * 0.5f;
1871            const GLfloat y = (hw_h - h) * 0.5f;
1872            vtx[0] = x;         vtx[1] = y;
1873            vtx[2] = x;         vtx[3] = y + h;
1874            vtx[4] = x + w;     vtx[5] = y + h;
1875            vtx[6] = x + w;     vtx[7] = y;
1876        }
1877    };
1878
1879    // the full animation is 24 frames
1880    char value[PROPERTY_VALUE_MAX];
1881    property_get("debug.sf.electron_frames", value, "24");
1882    int nbFrames = (atoi(value) + 1) >> 1;
1883    if (nbFrames <= 0) // just in case
1884        nbFrames = 24;
1885
1886    s_curve_interpolator itr(nbFrames, 7.5f);
1887    s_curve_interpolator itg(nbFrames, 8.0f);
1888    s_curve_interpolator itb(nbFrames, 8.5f);
1889
1890    v_stretch vverts(hw_w, hw_h);
1891    glEnable(GL_BLEND);
1892    glBlendFunc(GL_ONE, GL_ONE);
1893    for (int i=0 ; i<nbFrames ; i++) {
1894        float x, y, w, h;
1895        const float vr = itr(i);
1896        const float vg = itg(i);
1897        const float vb = itb(i);
1898
1899        // clear screen
1900        glColorMask(1,1,1,1);
1901        glClear(GL_COLOR_BUFFER_BIT);
1902        glEnable(GL_TEXTURE_2D);
1903
1904        // draw the red plane
1905        vverts(vtx, vr);
1906        glColorMask(1,0,0,1);
1907        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1908
1909        // draw the green plane
1910        vverts(vtx, vg);
1911        glColorMask(0,1,0,1);
1912        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1913
1914        // draw the blue plane
1915        vverts(vtx, vb);
1916        glColorMask(0,0,1,1);
1917        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1918
1919        // draw the white highlight (we use the last vertices)
1920        glDisable(GL_TEXTURE_2D);
1921        glColorMask(1,1,1,1);
1922        glColor4f(vg, vg, vg, 1);
1923        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1924        hw.flip(screenBounds);
1925    }
1926
1927    h_stretch hverts(hw_w, hw_h);
1928    glDisable(GL_BLEND);
1929    glDisable(GL_TEXTURE_2D);
1930    glColorMask(1,1,1,1);
1931    for (int i=0 ; i<nbFrames ; i++) {
1932        const float v = itg(i);
1933        hverts(vtx, v);
1934        glClear(GL_COLOR_BUFFER_BIT);
1935        glColor4f(1-v, 1-v, 1-v, 1);
1936        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1937        hw.flip(screenBounds);
1938    }
1939
1940    glColorMask(1,1,1,1);
1941    glEnable(GL_SCISSOR_TEST);
1942    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1943    glDeleteTextures(1, &tname);
1944    glDisable(GL_TEXTURE_2D);
1945    return NO_ERROR;
1946}
1947
1948status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1949{
1950    status_t result = PERMISSION_DENIED;
1951
1952    if (!GLExtensions::getInstance().haveFramebufferObject())
1953        return INVALID_OPERATION;
1954
1955
1956    // get screen geometry
1957    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1958    const uint32_t hw_w = hw.getWidth();
1959    const uint32_t hw_h = hw.getHeight();
1960    const Region screenBounds(hw.bounds());
1961
1962    GLfloat u, v;
1963    GLuint tname;
1964    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1965    if (result != NO_ERROR) {
1966        return result;
1967    }
1968
1969    // back to main framebuffer
1970    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1971    glDisable(GL_SCISSOR_TEST);
1972
1973    GLfloat vtx[8];
1974    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1975    glBindTexture(GL_TEXTURE_2D, tname);
1976    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1977    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1978    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1979    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1980    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1981    glVertexPointer(2, GL_FLOAT, 0, vtx);
1982
1983    class s_curve_interpolator {
1984        const float nbFrames, s, v;
1985    public:
1986        s_curve_interpolator(int nbFrames, float s)
1987        : nbFrames(1.0f / (nbFrames-1)), s(s),
1988          v(1.0f + expf(-s + 0.5f*s)) {
1989        }
1990        float operator()(int f) {
1991            const float x = f * nbFrames;
1992            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1993        }
1994    };
1995
1996    class v_stretch {
1997        const GLfloat hw_w, hw_h;
1998    public:
1999        v_stretch(uint32_t hw_w, uint32_t hw_h)
2000        : hw_w(hw_w), hw_h(hw_h) {
2001        }
2002        void operator()(GLfloat* vtx, float v) {
2003            const GLfloat w = hw_w + (hw_w * v);
2004            const GLfloat h = hw_h - (hw_h * v);
2005            const GLfloat x = (hw_w - w) * 0.5f;
2006            const GLfloat y = (hw_h - h) * 0.5f;
2007            vtx[0] = x;         vtx[1] = y;
2008            vtx[2] = x;         vtx[3] = y + h;
2009            vtx[4] = x + w;     vtx[5] = y + h;
2010            vtx[6] = x + w;     vtx[7] = y;
2011        }
2012    };
2013
2014    class h_stretch {
2015        const GLfloat hw_w, hw_h;
2016    public:
2017        h_stretch(uint32_t hw_w, uint32_t hw_h)
2018        : hw_w(hw_w), hw_h(hw_h) {
2019        }
2020        void operator()(GLfloat* vtx, float v) {
2021            const GLfloat w = hw_w - (hw_w * v);
2022            const GLfloat h = 1.0f;
2023            const GLfloat x = (hw_w - w) * 0.5f;
2024            const GLfloat y = (hw_h - h) * 0.5f;
2025            vtx[0] = x;         vtx[1] = y;
2026            vtx[2] = x;         vtx[3] = y + h;
2027            vtx[4] = x + w;     vtx[5] = y + h;
2028            vtx[6] = x + w;     vtx[7] = y;
2029        }
2030    };
2031
2032    // the full animation is 12 frames
2033    int nbFrames = 8;
2034    s_curve_interpolator itr(nbFrames, 7.5f);
2035    s_curve_interpolator itg(nbFrames, 8.0f);
2036    s_curve_interpolator itb(nbFrames, 8.5f);
2037
2038    h_stretch hverts(hw_w, hw_h);
2039    glDisable(GL_BLEND);
2040    glDisable(GL_TEXTURE_2D);
2041    glColorMask(1,1,1,1);
2042    for (int i=nbFrames-1 ; i>=0 ; i--) {
2043        const float v = itg(i);
2044        hverts(vtx, v);
2045        glClear(GL_COLOR_BUFFER_BIT);
2046        glColor4f(1-v, 1-v, 1-v, 1);
2047        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2048        hw.flip(screenBounds);
2049    }
2050
2051    nbFrames = 4;
2052    v_stretch vverts(hw_w, hw_h);
2053    glEnable(GL_BLEND);
2054    glBlendFunc(GL_ONE, GL_ONE);
2055    for (int i=nbFrames-1 ; i>=0 ; i--) {
2056        float x, y, w, h;
2057        const float vr = itr(i);
2058        const float vg = itg(i);
2059        const float vb = itb(i);
2060
2061        // clear screen
2062        glColorMask(1,1,1,1);
2063        glClear(GL_COLOR_BUFFER_BIT);
2064        glEnable(GL_TEXTURE_2D);
2065
2066        // draw the red plane
2067        vverts(vtx, vr);
2068        glColorMask(1,0,0,1);
2069        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2070
2071        // draw the green plane
2072        vverts(vtx, vg);
2073        glColorMask(0,1,0,1);
2074        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2075
2076        // draw the blue plane
2077        vverts(vtx, vb);
2078        glColorMask(0,0,1,1);
2079        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2080
2081        hw.flip(screenBounds);
2082    }
2083
2084    glColorMask(1,1,1,1);
2085    glEnable(GL_SCISSOR_TEST);
2086    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2087    glDeleteTextures(1, &tname);
2088    glDisable(GL_TEXTURE_2D);
2089
2090    return NO_ERROR;
2091}
2092
2093// ---------------------------------------------------------------------------
2094
2095status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2096{
2097    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2098    if (!hw.canDraw()) {
2099        // we're already off
2100        return NO_ERROR;
2101    }
2102    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2103        electronBeamOffAnimationImplLocked();
2104    }
2105
2106    // always clear the whole screen at the end of the animation
2107    glClearColor(0,0,0,1);
2108    glDisable(GL_SCISSOR_TEST);
2109    glClear(GL_COLOR_BUFFER_BIT);
2110    glEnable(GL_SCISSOR_TEST);
2111    hw.flip( Region(hw.bounds()) );
2112
2113    hw.setCanDraw(false);
2114    return NO_ERROR;
2115}
2116
2117status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2118{
2119    class MessageTurnElectronBeamOff : public MessageBase {
2120        SurfaceFlinger* flinger;
2121        int32_t mode;
2122        status_t result;
2123    public:
2124        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2125            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2126        }
2127        status_t getResult() const {
2128            return result;
2129        }
2130        virtual bool handler() {
2131            Mutex::Autolock _l(flinger->mStateLock);
2132            result = flinger->turnElectronBeamOffImplLocked(mode);
2133            return true;
2134        }
2135    };
2136
2137    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2138    status_t res = postMessageSync(msg);
2139    if (res == NO_ERROR) {
2140        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2141
2142        // work-around: when the power-manager calls us we activate the
2143        // animation. eventually, the "on" animation will be called
2144        // by the power-manager itself
2145        mElectronBeamAnimationMode = mode;
2146    }
2147    return res;
2148}
2149
2150// ---------------------------------------------------------------------------
2151
2152status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2153{
2154    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2155    if (hw.canDraw()) {
2156        // we're already on
2157        return NO_ERROR;
2158    }
2159    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2160        electronBeamOnAnimationImplLocked();
2161    }
2162    hw.setCanDraw(true);
2163
2164    // make sure to redraw the whole screen when the animation is done
2165    mDirtyRegion.set(hw.bounds());
2166    signalEvent();
2167
2168    return NO_ERROR;
2169}
2170
2171status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2172{
2173    class MessageTurnElectronBeamOn : public MessageBase {
2174        SurfaceFlinger* flinger;
2175        int32_t mode;
2176        status_t result;
2177    public:
2178        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2179            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2180        }
2181        status_t getResult() const {
2182            return result;
2183        }
2184        virtual bool handler() {
2185            Mutex::Autolock _l(flinger->mStateLock);
2186            result = flinger->turnElectronBeamOnImplLocked(mode);
2187            return true;
2188        }
2189    };
2190
2191    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2192    return NO_ERROR;
2193}
2194
2195// ---------------------------------------------------------------------------
2196
2197status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2198        sp<IMemoryHeap>* heap,
2199        uint32_t* w, uint32_t* h, PixelFormat* f,
2200        uint32_t sw, uint32_t sh,
2201        uint32_t minLayerZ, uint32_t maxLayerZ)
2202{
2203    status_t result = PERMISSION_DENIED;
2204
2205    // only one display supported for now
2206    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2207        return BAD_VALUE;
2208
2209    // make sure none of the layers are protected
2210    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2211    const size_t count = layers.size();
2212    for (size_t i=0 ; i<count ; ++i) {
2213        const sp<LayerBase>& layer(layers[i]);
2214        const uint32_t z = layer->drawingState().z;
2215        if (z >= minLayerZ && z <= maxLayerZ) {
2216            if (layer->isProtected()) {
2217                return INVALID_OPERATION;
2218            }
2219        }
2220    }
2221
2222    if (!GLExtensions::getInstance().haveFramebufferObject())
2223        return INVALID_OPERATION;
2224
2225    // get screen geometry
2226    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2227    const uint32_t hw_w = hw.getWidth();
2228    const uint32_t hw_h = hw.getHeight();
2229
2230    if ((sw > hw_w) || (sh > hw_h))
2231        return BAD_VALUE;
2232
2233    sw = (!sw) ? hw_w : sw;
2234    sh = (!sh) ? hw_h : sh;
2235    const size_t size = sw * sh * 4;
2236
2237    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2238    //        sw, sh, minLayerZ, maxLayerZ);
2239
2240    // make sure to clear all GL error flags
2241    while ( glGetError() != GL_NO_ERROR ) ;
2242
2243    // create a FBO
2244    GLuint name, tname;
2245    glGenRenderbuffersOES(1, &tname);
2246    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2247    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2248    glGenFramebuffersOES(1, &name);
2249    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2250    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2251            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2252
2253    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2254
2255    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2256
2257        // invert everything, b/c glReadPixel() below will invert the FB
2258        glViewport(0, 0, sw, sh);
2259        glScissor(0, 0, sw, sh);
2260        glEnable(GL_SCISSOR_TEST);
2261        glMatrixMode(GL_PROJECTION);
2262        glPushMatrix();
2263        glLoadIdentity();
2264        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2265        glMatrixMode(GL_MODELVIEW);
2266
2267        // redraw the screen entirely...
2268        glClearColor(0,0,0,1);
2269        glClear(GL_COLOR_BUFFER_BIT);
2270
2271        for (size_t i=0 ; i<count ; ++i) {
2272            const sp<LayerBase>& layer(layers[i]);
2273            const uint32_t z = layer->drawingState().z;
2274            if (z >= minLayerZ && z <= maxLayerZ) {
2275                layer->drawForSreenShot();
2276            }
2277        }
2278
2279        // XXX: this is needed on tegra
2280        glEnable(GL_SCISSOR_TEST);
2281        glScissor(0, 0, sw, sh);
2282
2283        // check for errors and return screen capture
2284        if (glGetError() != GL_NO_ERROR) {
2285            // error while rendering
2286            result = INVALID_OPERATION;
2287        } else {
2288            // allocate shared memory large enough to hold the
2289            // screen capture
2290            sp<MemoryHeapBase> base(
2291                    new MemoryHeapBase(size, 0, "screen-capture") );
2292            void* const ptr = base->getBase();
2293            if (ptr) {
2294                // capture the screen with glReadPixels()
2295                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2296                if (glGetError() == GL_NO_ERROR) {
2297                    *heap = base;
2298                    *w = sw;
2299                    *h = sh;
2300                    *f = PIXEL_FORMAT_RGBA_8888;
2301                    result = NO_ERROR;
2302                }
2303            } else {
2304                result = NO_MEMORY;
2305            }
2306        }
2307        glEnable(GL_SCISSOR_TEST);
2308        glViewport(0, 0, hw_w, hw_h);
2309        glMatrixMode(GL_PROJECTION);
2310        glPopMatrix();
2311        glMatrixMode(GL_MODELVIEW);
2312    } else {
2313        result = BAD_VALUE;
2314    }
2315
2316    // release FBO resources
2317    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2318    glDeleteRenderbuffersOES(1, &tname);
2319    glDeleteFramebuffersOES(1, &name);
2320
2321    hw.compositionComplete();
2322
2323    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2324
2325    return result;
2326}
2327
2328
2329status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2330        sp<IMemoryHeap>* heap,
2331        uint32_t* width, uint32_t* height, PixelFormat* format,
2332        uint32_t sw, uint32_t sh,
2333        uint32_t minLayerZ, uint32_t maxLayerZ)
2334{
2335    // only one display supported for now
2336    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2337        return BAD_VALUE;
2338
2339    if (!GLExtensions::getInstance().haveFramebufferObject())
2340        return INVALID_OPERATION;
2341
2342    class MessageCaptureScreen : public MessageBase {
2343        SurfaceFlinger* flinger;
2344        DisplayID dpy;
2345        sp<IMemoryHeap>* heap;
2346        uint32_t* w;
2347        uint32_t* h;
2348        PixelFormat* f;
2349        uint32_t sw;
2350        uint32_t sh;
2351        uint32_t minLayerZ;
2352        uint32_t maxLayerZ;
2353        status_t result;
2354    public:
2355        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2356                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2357                uint32_t sw, uint32_t sh,
2358                uint32_t minLayerZ, uint32_t maxLayerZ)
2359            : flinger(flinger), dpy(dpy),
2360              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2361              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2362              result(PERMISSION_DENIED)
2363        {
2364        }
2365        status_t getResult() const {
2366            return result;
2367        }
2368        virtual bool handler() {
2369            Mutex::Autolock _l(flinger->mStateLock);
2370
2371            // if we have secure windows, never allow the screen capture
2372            if (flinger->mSecureFrameBuffer)
2373                return true;
2374
2375            result = flinger->captureScreenImplLocked(dpy,
2376                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2377
2378            return true;
2379        }
2380    };
2381
2382    sp<MessageBase> msg = new MessageCaptureScreen(this,
2383            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2384    status_t res = postMessageSync(msg);
2385    if (res == NO_ERROR) {
2386        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2387    }
2388    return res;
2389}
2390
2391// ---------------------------------------------------------------------------
2392
2393sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2394{
2395    sp<Layer> result;
2396    Mutex::Autolock _l(mStateLock);
2397    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2398    return result;
2399}
2400
2401// ---------------------------------------------------------------------------
2402
2403Client::Client(const sp<SurfaceFlinger>& flinger)
2404    : mFlinger(flinger), mNameGenerator(1)
2405{
2406}
2407
2408Client::~Client()
2409{
2410    const size_t count = mLayers.size();
2411    for (size_t i=0 ; i<count ; i++) {
2412        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2413        if (layer != 0) {
2414            mFlinger->removeLayer(layer);
2415        }
2416    }
2417}
2418
2419status_t Client::initCheck() const {
2420    return NO_ERROR;
2421}
2422
2423size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2424{
2425    Mutex::Autolock _l(mLock);
2426    size_t name = mNameGenerator++;
2427    mLayers.add(name, layer);
2428    return name;
2429}
2430
2431void Client::detachLayer(const LayerBaseClient* layer)
2432{
2433    Mutex::Autolock _l(mLock);
2434    // we do a linear search here, because this doesn't happen often
2435    const size_t count = mLayers.size();
2436    for (size_t i=0 ; i<count ; i++) {
2437        if (mLayers.valueAt(i) == layer) {
2438            mLayers.removeItemsAt(i, 1);
2439            break;
2440        }
2441    }
2442}
2443sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2444{
2445    Mutex::Autolock _l(mLock);
2446    sp<LayerBaseClient> lbc;
2447    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2448    if (layer != 0) {
2449        lbc = layer.promote();
2450        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2451    }
2452    return lbc;
2453}
2454
2455
2456status_t Client::onTransact(
2457    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2458{
2459    // these must be checked
2460     IPCThreadState* ipc = IPCThreadState::self();
2461     const int pid = ipc->getCallingPid();
2462     const int uid = ipc->getCallingUid();
2463     const int self_pid = getpid();
2464     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2465         // we're called from a different process, do the real check
2466         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2467         {
2468             LOGE("Permission Denial: "
2469                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2470             return PERMISSION_DENIED;
2471         }
2472     }
2473     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2474}
2475
2476
2477sp<ISurface> Client::createSurface(
2478        ISurfaceComposerClient::surface_data_t* params,
2479        const String8& name,
2480        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2481        uint32_t flags)
2482{
2483    /*
2484     * createSurface must be called from the GL thread so that it can
2485     * have access to the GL context.
2486     */
2487
2488    class MessageCreateSurface : public MessageBase {
2489        sp<ISurface> result;
2490        SurfaceFlinger* flinger;
2491        ISurfaceComposerClient::surface_data_t* params;
2492        Client* client;
2493        const String8& name;
2494        DisplayID display;
2495        uint32_t w, h;
2496        PixelFormat format;
2497        uint32_t flags;
2498    public:
2499        MessageCreateSurface(SurfaceFlinger* flinger,
2500                ISurfaceComposerClient::surface_data_t* params,
2501                const String8& name, Client* client,
2502                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2503                uint32_t flags)
2504            : flinger(flinger), params(params), client(client), name(name),
2505              display(display), w(w), h(h), format(format), flags(flags)
2506        {
2507        }
2508        sp<ISurface> getResult() const { return result; }
2509        virtual bool handler() {
2510            result = flinger->createSurface(params, name, client,
2511                    display, w, h, format, flags);
2512            return true;
2513        }
2514    };
2515
2516    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2517            params, name, this, display, w, h, format, flags);
2518    mFlinger->postMessageSync(msg);
2519    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2520}
2521status_t Client::destroySurface(SurfaceID sid) {
2522    return mFlinger->removeSurface(this, sid);
2523}
2524
2525// ---------------------------------------------------------------------------
2526
2527GraphicBufferAlloc::GraphicBufferAlloc() {}
2528
2529GraphicBufferAlloc::~GraphicBufferAlloc() {}
2530
2531sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2532        PixelFormat format, uint32_t usage, status_t* error) {
2533    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2534    status_t err = graphicBuffer->initCheck();
2535    *error = err;
2536    if (err != 0 || graphicBuffer->handle == 0) {
2537        if (err == NO_MEMORY) {
2538            GraphicBuffer::dumpAllocationsToSystemLog();
2539        }
2540        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2541             "failed (%s), handle=%p",
2542                w, h, strerror(-err), graphicBuffer->handle);
2543        return 0;
2544    }
2545    return graphicBuffer;
2546}
2547
2548// ---------------------------------------------------------------------------
2549
2550GraphicPlane::GraphicPlane()
2551    : mHw(0)
2552{
2553}
2554
2555GraphicPlane::~GraphicPlane() {
2556    delete mHw;
2557}
2558
2559bool GraphicPlane::initialized() const {
2560    return mHw ? true : false;
2561}
2562
2563int GraphicPlane::getWidth() const {
2564    return mWidth;
2565}
2566
2567int GraphicPlane::getHeight() const {
2568    return mHeight;
2569}
2570
2571void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2572{
2573    mHw = hw;
2574
2575    // initialize the display orientation transform.
2576    // it's a constant that should come from the display driver.
2577    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2578    char property[PROPERTY_VALUE_MAX];
2579    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2580        //displayOrientation
2581        switch (atoi(property)) {
2582        case 90:
2583            displayOrientation = ISurfaceComposer::eOrientation90;
2584            break;
2585        case 270:
2586            displayOrientation = ISurfaceComposer::eOrientation270;
2587            break;
2588        }
2589    }
2590
2591    const float w = hw->getWidth();
2592    const float h = hw->getHeight();
2593    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2594            &mDisplayTransform);
2595    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2596        mDisplayWidth = h;
2597        mDisplayHeight = w;
2598    } else {
2599        mDisplayWidth = w;
2600        mDisplayHeight = h;
2601    }
2602
2603    setOrientation(ISurfaceComposer::eOrientationDefault);
2604}
2605
2606status_t GraphicPlane::orientationToTransfrom(
2607        int orientation, int w, int h, Transform* tr)
2608{
2609    uint32_t flags = 0;
2610    switch (orientation) {
2611    case ISurfaceComposer::eOrientationDefault:
2612        flags = Transform::ROT_0;
2613        break;
2614    case ISurfaceComposer::eOrientation90:
2615        flags = Transform::ROT_90;
2616        break;
2617    case ISurfaceComposer::eOrientation180:
2618        flags = Transform::ROT_180;
2619        break;
2620    case ISurfaceComposer::eOrientation270:
2621        flags = Transform::ROT_270;
2622        break;
2623    default:
2624        return BAD_VALUE;
2625    }
2626    tr->set(flags, w, h);
2627    return NO_ERROR;
2628}
2629
2630status_t GraphicPlane::setOrientation(int orientation)
2631{
2632    // If the rotation can be handled in hardware, this is where
2633    // the magic should happen.
2634
2635    const DisplayHardware& hw(displayHardware());
2636    const float w = mDisplayWidth;
2637    const float h = mDisplayHeight;
2638    mWidth = int(w);
2639    mHeight = int(h);
2640
2641    Transform orientationTransform;
2642    GraphicPlane::orientationToTransfrom(orientation, w, h,
2643            &orientationTransform);
2644    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2645        mWidth = int(h);
2646        mHeight = int(w);
2647    }
2648
2649    mOrientation = orientation;
2650    mGlobalTransform = mDisplayTransform * orientationTransform;
2651    return NO_ERROR;
2652}
2653
2654const DisplayHardware& GraphicPlane::displayHardware() const {
2655    return *mHw;
2656}
2657
2658DisplayHardware& GraphicPlane::editDisplayHardware() {
2659    return *mHw;
2660}
2661
2662const Transform& GraphicPlane::transform() const {
2663    return mGlobalTransform;
2664}
2665
2666EGLDisplay GraphicPlane::getEGLDisplay() const {
2667    return mHw->getEGLDisplay();
2668}
2669
2670// ---------------------------------------------------------------------------
2671
2672}; // namespace android
2673