SurfaceFlinger.cpp revision a6546e5af4ce0cff01cd13605fc3eb16325feac3 
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
36#include <utils/String8.h>
37#include <utils/String16.h>
38#include <utils/StopWatch.h>
39
40#include <ui/GraphicBufferAllocator.h>
41#include <ui/GraphicLog.h>
42#include <ui/PixelFormat.h>
43
44#include <pixelflinger/pixelflinger.h>
45#include <GLES/gl.h>
46
47#include "clz.h"
48#include "GLExtensions.h"
49#include "Layer.h"
50#include "LayerBlur.h"
51#include "LayerBuffer.h"
52#include "LayerDim.h"
53#include "SurfaceFlinger.h"
54
55#include "DisplayHardware/DisplayHardware.h"
56
57/* ideally AID_GRAPHICS would be in a semi-public header
58 * or there would be a way to map a user/group name to its id
59 */
60#ifndef AID_GRAPHICS
61#define AID_GRAPHICS 1003
62#endif
63
64#define DISPLAY_COUNT       1
65
66namespace android {
67// ---------------------------------------------------------------------------
68
69SurfaceFlinger::SurfaceFlinger()
70    :   BnSurfaceComposer(), Thread(false),
71        mTransactionFlags(0),
72        mTransactionCount(0),
73        mResizeTransationPending(false),
74        mLayersRemoved(false),
75        mBootTime(systemTime()),
76        mHardwareTest("android.permission.HARDWARE_TEST"),
77        mAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER"),
78        mReadFramebuffer("android.permission.READ_FRAME_BUFFER"),
79        mDump("android.permission.DUMP"),
80        mVisibleRegionsDirty(false),
81        mDeferReleaseConsole(false),
82        mFreezeDisplay(false),
83        mElectronBeamAnimationMode(0),
84        mFreezeCount(0),
85        mFreezeDisplayTime(0),
86        mDebugRegion(0),
87        mDebugBackground(0),
88        mDebugInSwapBuffers(0),
89        mLastSwapBufferTime(0),
90        mDebugInTransaction(0),
91        mLastTransactionTime(0),
92        mBootFinished(false),
93        mConsoleSignals(0),
94        mSecureFrameBuffer(0)
95{
96    init();
97}
98
99void SurfaceFlinger::init()
100{
101    LOGI("SurfaceFlinger is starting");
102
103    // debugging stuff...
104    char value[PROPERTY_VALUE_MAX];
105    property_get("debug.sf.showupdates", value, "0");
106    mDebugRegion = atoi(value);
107    property_get("debug.sf.showbackground", value, "0");
108    mDebugBackground = atoi(value);
109
110    LOGI_IF(mDebugRegion,       "showupdates enabled");
111    LOGI_IF(mDebugBackground,   "showbackground enabled");
112}
113
114SurfaceFlinger::~SurfaceFlinger()
115{
116    glDeleteTextures(1, &mWormholeTexName);
117}
118
119overlay_control_device_t* SurfaceFlinger::getOverlayEngine() const
120{
121    return graphicPlane(0).displayHardware().getOverlayEngine();
122}
123
124sp<IMemoryHeap> SurfaceFlinger::getCblk() const
125{
126    return mServerHeap;
127}
128
129sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
130{
131    sp<ISurfaceComposerClient> bclient;
132    sp<Client> client(new Client(this));
133    status_t err = client->initCheck();
134    if (err == NO_ERROR) {
135        bclient = client;
136    }
137    return bclient;
138}
139
140sp<ISurfaceComposerClient> SurfaceFlinger::createClientConnection()
141{
142    sp<ISurfaceComposerClient> bclient;
143    sp<UserClient> client(new UserClient(this));
144    status_t err = client->initCheck();
145    if (err == NO_ERROR) {
146        bclient = client;
147    }
148    return bclient;
149}
150
151
152const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
153{
154    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
155    const GraphicPlane& plane(mGraphicPlanes[dpy]);
156    return plane;
157}
158
159GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
160{
161    return const_cast<GraphicPlane&>(
162        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
163}
164
165void SurfaceFlinger::bootFinished()
166{
167    const nsecs_t now = systemTime();
168    const nsecs_t duration = now - mBootTime;
169    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
170    mBootFinished = true;
171    property_set("ctl.stop", "bootanim");
172}
173
174void SurfaceFlinger::onFirstRef()
175{
176    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
177
178    // Wait for the main thread to be done with its initialization
179    mReadyToRunBarrier.wait();
180}
181
182static inline uint16_t pack565(int r, int g, int b) {
183    return (r<<11)|(g<<5)|b;
184}
185
186status_t SurfaceFlinger::readyToRun()
187{
188    LOGI(   "SurfaceFlinger's main thread ready to run. "
189            "Initializing graphics H/W...");
190
191    // we only support one display currently
192    int dpy = 0;
193
194    {
195        // initialize the main display
196        GraphicPlane& plane(graphicPlane(dpy));
197        DisplayHardware* const hw = new DisplayHardware(this, dpy);
198        plane.setDisplayHardware(hw);
199    }
200
201    // create the shared control-block
202    mServerHeap = new MemoryHeapBase(4096,
203            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
204    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
205
206    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
207    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
208
209    new(mServerCblk) surface_flinger_cblk_t;
210
211    // initialize primary screen
212    // (other display should be initialized in the same manner, but
213    // asynchronously, as they could come and go. None of this is supported
214    // yet).
215    const GraphicPlane& plane(graphicPlane(dpy));
216    const DisplayHardware& hw = plane.displayHardware();
217    const uint32_t w = hw.getWidth();
218    const uint32_t h = hw.getHeight();
219    const uint32_t f = hw.getFormat();
220    hw.makeCurrent();
221
222    // initialize the shared control block
223    mServerCblk->connected |= 1<<dpy;
224    display_cblk_t* dcblk = mServerCblk->displays + dpy;
225    memset(dcblk, 0, sizeof(display_cblk_t));
226    dcblk->w            = plane.getWidth();
227    dcblk->h            = plane.getHeight();
228    dcblk->format       = f;
229    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
230    dcblk->xdpi         = hw.getDpiX();
231    dcblk->ydpi         = hw.getDpiY();
232    dcblk->fps          = hw.getRefreshRate();
233    dcblk->density      = hw.getDensity();
234
235    // Initialize OpenGL|ES
236    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
237    glPixelStorei(GL_PACK_ALIGNMENT, 4);
238    glEnableClientState(GL_VERTEX_ARRAY);
239    glEnable(GL_SCISSOR_TEST);
240    glShadeModel(GL_FLAT);
241    glDisable(GL_DITHER);
242    glDisable(GL_CULL_FACE);
243
244    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
245    const uint16_t g1 = pack565(0x17,0x2f,0x17);
246    const uint16_t textureData[4] = { g0, g1, g1, g0 };
247    glGenTextures(1, &mWormholeTexName);
248    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
249    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
250    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
251    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
252    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
253    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
254            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
255
256    glViewport(0, 0, w, h);
257    glMatrixMode(GL_PROJECTION);
258    glLoadIdentity();
259    glOrthof(0, w, h, 0, 0, 1);
260
261   LayerDim::initDimmer(this, w, h);
262
263    mReadyToRunBarrier.open();
264
265    /*
266     *  We're now ready to accept clients...
267     */
268
269    // start boot animation
270    property_set("ctl.start", "bootanim");
271
272    return NO_ERROR;
273}
274
275// ----------------------------------------------------------------------------
276#if 0
277#pragma mark -
278#pragma mark Events Handler
279#endif
280
281void SurfaceFlinger::waitForEvent()
282{
283    while (true) {
284        nsecs_t timeout = -1;
285        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
286        if (UNLIKELY(isFrozen())) {
287            // wait 5 seconds
288            const nsecs_t now = systemTime();
289            if (mFreezeDisplayTime == 0) {
290                mFreezeDisplayTime = now;
291            }
292            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
293            timeout = waitTime>0 ? waitTime : 0;
294        }
295
296        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
297
298        // see if we timed out
299        if (isFrozen()) {
300            const nsecs_t now = systemTime();
301            nsecs_t frozenTime = (now - mFreezeDisplayTime);
302            if (frozenTime >= freezeDisplayTimeout) {
303                // we timed out and are still frozen
304                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
305                        mFreezeDisplay, mFreezeCount);
306                mFreezeDisplayTime = 0;
307                mFreezeCount = 0;
308                mFreezeDisplay = false;
309            }
310        }
311
312        if (msg != 0) {
313            switch (msg->what) {
314                case MessageQueue::INVALIDATE:
315                    // invalidate message, just return to the main loop
316                    return;
317            }
318        }
319    }
320}
321
322void SurfaceFlinger::signalEvent() {
323    mEventQueue.invalidate();
324}
325
326void SurfaceFlinger::signal() const {
327    // this is the IPC call
328    const_cast<SurfaceFlinger*>(this)->signalEvent();
329}
330
331status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
332        nsecs_t reltime, uint32_t flags)
333{
334    return mEventQueue.postMessage(msg, reltime, flags);
335}
336
337status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
338        nsecs_t reltime, uint32_t flags)
339{
340    status_t res = mEventQueue.postMessage(msg, reltime, flags);
341    if (res == NO_ERROR) {
342        msg->wait();
343    }
344    return res;
345}
346
347// ----------------------------------------------------------------------------
348#if 0
349#pragma mark -
350#pragma mark Main loop
351#endif
352
353bool SurfaceFlinger::threadLoop()
354{
355    waitForEvent();
356
357    // check for transactions
358    if (UNLIKELY(mConsoleSignals)) {
359        handleConsoleEvents();
360    }
361
362    if (LIKELY(mTransactionCount == 0)) {
363        // if we're in a global transaction, don't do anything.
364        const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
365        uint32_t transactionFlags = getTransactionFlags(mask);
366        if (LIKELY(transactionFlags)) {
367            handleTransaction(transactionFlags);
368        }
369    }
370
371    // post surfaces (if needed)
372    handlePageFlip();
373
374    const DisplayHardware& hw(graphicPlane(0).displayHardware());
375    if (LIKELY(hw.canDraw() && !isFrozen())) {
376        // repaint the framebuffer (if needed)
377
378        const int index = hw.getCurrentBufferIndex();
379        GraphicLog& logger(GraphicLog::getInstance());
380
381        logger.log(GraphicLog::SF_REPAINT, index);
382        handleRepaint();
383
384        // inform the h/w that we're done compositing
385        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
386        hw.compositionComplete();
387
388        // release the clients before we flip ('cause flip might block)
389        logger.log(GraphicLog::SF_UNLOCK_CLIENTS, index);
390        unlockClients();
391
392        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
393        postFramebuffer();
394
395        logger.log(GraphicLog::SF_REPAINT_DONE, index);
396    } else {
397        // pretend we did the post
398        unlockClients();
399        usleep(16667); // 60 fps period
400    }
401    return true;
402}
403
404void SurfaceFlinger::postFramebuffer()
405{
406    if (!mInvalidRegion.isEmpty()) {
407        const DisplayHardware& hw(graphicPlane(0).displayHardware());
408        const nsecs_t now = systemTime();
409        mDebugInSwapBuffers = now;
410        hw.flip(mInvalidRegion);
411        mLastSwapBufferTime = systemTime() - now;
412        mDebugInSwapBuffers = 0;
413        mInvalidRegion.clear();
414    }
415}
416
417void SurfaceFlinger::handleConsoleEvents()
418{
419    // something to do with the console
420    const DisplayHardware& hw = graphicPlane(0).displayHardware();
421
422    int what = android_atomic_and(0, &mConsoleSignals);
423    if (what & eConsoleAcquired) {
424        hw.acquireScreen();
425        // this is a temporary work-around, eventually this should be called
426        // by the power-manager
427        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
428    }
429
430    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
431        // We got the release signal before the acquire signal
432        mDeferReleaseConsole = false;
433        hw.releaseScreen();
434    }
435
436    if (what & eConsoleReleased) {
437        if (hw.isScreenAcquired()) {
438            hw.releaseScreen();
439        } else {
440            mDeferReleaseConsole = true;
441        }
442    }
443
444    mDirtyRegion.set(hw.bounds());
445}
446
447void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
448{
449    Vector< sp<LayerBase> > ditchedLayers;
450
451    /*
452     * Perform and commit the transaction
453     */
454
455    { // scope for the lock
456        Mutex::Autolock _l(mStateLock);
457        const nsecs_t now = systemTime();
458        mDebugInTransaction = now;
459        handleTransactionLocked(transactionFlags, ditchedLayers);
460        mLastTransactionTime = systemTime() - now;
461        mDebugInTransaction = 0;
462        // here the transaction has been committed
463    }
464
465    /*
466     * Clean-up all layers that went away
467     * (do this without the lock held)
468     */
469    const size_t count = ditchedLayers.size();
470    for (size_t i=0 ; i<count ; i++) {
471        if (ditchedLayers[i] != 0) {
472            //LOGD("ditching layer %p", ditchedLayers[i].get());
473            ditchedLayers[i]->ditch();
474        }
475    }
476}
477
478void SurfaceFlinger::handleTransactionLocked(
479        uint32_t transactionFlags, Vector< sp<LayerBase> >& ditchedLayers)
480{
481    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
482    const size_t count = currentLayers.size();
483
484    /*
485     * Traversal of the children
486     * (perform the transaction for each of them if needed)
487     */
488
489    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
490    if (layersNeedTransaction) {
491        for (size_t i=0 ; i<count ; i++) {
492            const sp<LayerBase>& layer = currentLayers[i];
493            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
494            if (!trFlags) continue;
495
496            const uint32_t flags = layer->doTransaction(0);
497            if (flags & Layer::eVisibleRegion)
498                mVisibleRegionsDirty = true;
499        }
500    }
501
502    /*
503     * Perform our own transaction if needed
504     */
505
506    if (transactionFlags & eTransactionNeeded) {
507        if (mCurrentState.orientation != mDrawingState.orientation) {
508            // the orientation has changed, recompute all visible regions
509            // and invalidate everything.
510
511            const int dpy = 0;
512            const int orientation = mCurrentState.orientation;
513            const uint32_t type = mCurrentState.orientationType;
514            GraphicPlane& plane(graphicPlane(dpy));
515            plane.setOrientation(orientation);
516
517            // update the shared control block
518            const DisplayHardware& hw(plane.displayHardware());
519            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
520            dcblk->orientation = orientation;
521            dcblk->w = plane.getWidth();
522            dcblk->h = plane.getHeight();
523
524            mVisibleRegionsDirty = true;
525            mDirtyRegion.set(hw.bounds());
526        }
527
528        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
529            // freezing or unfreezing the display -> trigger animation if needed
530            mFreezeDisplay = mCurrentState.freezeDisplay;
531            if (mFreezeDisplay)
532                 mFreezeDisplayTime = 0;
533        }
534
535        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
536            // layers have been added
537            mVisibleRegionsDirty = true;
538        }
539
540        // some layers might have been removed, so
541        // we need to update the regions they're exposing.
542        if (mLayersRemoved) {
543            mLayersRemoved = false;
544            mVisibleRegionsDirty = true;
545            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
546            const size_t count = previousLayers.size();
547            for (size_t i=0 ; i<count ; i++) {
548                const sp<LayerBase>& layer(previousLayers[i]);
549                if (currentLayers.indexOf( layer ) < 0) {
550                    // this layer is not visible anymore
551                    ditchedLayers.add(layer);
552                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
553                }
554            }
555        }
556    }
557
558    commitTransaction();
559}
560
561sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
562{
563    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
564}
565
566void SurfaceFlinger::computeVisibleRegions(
567    LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
568{
569    const GraphicPlane& plane(graphicPlane(0));
570    const Transform& planeTransform(plane.transform());
571    const DisplayHardware& hw(plane.displayHardware());
572    const Region screenRegion(hw.bounds());
573
574    Region aboveOpaqueLayers;
575    Region aboveCoveredLayers;
576    Region dirty;
577
578    bool secureFrameBuffer = false;
579
580    size_t i = currentLayers.size();
581    while (i--) {
582        const sp<LayerBase>& layer = currentLayers[i];
583        layer->validateVisibility(planeTransform);
584
585        // start with the whole surface at its current location
586        const Layer::State& s(layer->drawingState());
587
588        /*
589         * opaqueRegion: area of a surface that is fully opaque.
590         */
591        Region opaqueRegion;
592
593        /*
594         * visibleRegion: area of a surface that is visible on screen
595         * and not fully transparent. This is essentially the layer's
596         * footprint minus the opaque regions above it.
597         * Areas covered by a translucent surface are considered visible.
598         */
599        Region visibleRegion;
600
601        /*
602         * coveredRegion: area of a surface that is covered by all
603         * visible regions above it (which includes the translucent areas).
604         */
605        Region coveredRegion;
606
607
608        // handle hidden surfaces by setting the visible region to empty
609        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
610            const bool translucent = layer->needsBlending();
611            const Rect bounds(layer->visibleBounds());
612            visibleRegion.set(bounds);
613            visibleRegion.andSelf(screenRegion);
614            if (!visibleRegion.isEmpty()) {
615                // Remove the transparent area from the visible region
616                if (translucent) {
617                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
618                }
619
620                // compute the opaque region
621                const int32_t layerOrientation = layer->getOrientation();
622                if (s.alpha==255 && !translucent &&
623                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
624                    // the opaque region is the layer's footprint
625                    opaqueRegion = visibleRegion;
626                }
627            }
628        }
629
630        // Clip the covered region to the visible region
631        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
632
633        // Update aboveCoveredLayers for next (lower) layer
634        aboveCoveredLayers.orSelf(visibleRegion);
635
636        // subtract the opaque region covered by the layers above us
637        visibleRegion.subtractSelf(aboveOpaqueLayers);
638
639        // compute this layer's dirty region
640        if (layer->contentDirty) {
641            // we need to invalidate the whole region
642            dirty = visibleRegion;
643            // as well, as the old visible region
644            dirty.orSelf(layer->visibleRegionScreen);
645            layer->contentDirty = false;
646        } else {
647            /* compute the exposed region:
648             *   the exposed region consists of two components:
649             *   1) what's VISIBLE now and was COVERED before
650             *   2) what's EXPOSED now less what was EXPOSED before
651             *
652             * note that (1) is conservative, we start with the whole
653             * visible region but only keep what used to be covered by
654             * something -- which mean it may have been exposed.
655             *
656             * (2) handles areas that were not covered by anything but got
657             * exposed because of a resize.
658             */
659            const Region newExposed = visibleRegion - coveredRegion;
660            const Region oldVisibleRegion = layer->visibleRegionScreen;
661            const Region oldCoveredRegion = layer->coveredRegionScreen;
662            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
663            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
664        }
665        dirty.subtractSelf(aboveOpaqueLayers);
666
667        // accumulate to the screen dirty region
668        dirtyRegion.orSelf(dirty);
669
670        // Update aboveOpaqueLayers for next (lower) layer
671        aboveOpaqueLayers.orSelf(opaqueRegion);
672
673        // Store the visible region is screen space
674        layer->setVisibleRegion(visibleRegion);
675        layer->setCoveredRegion(coveredRegion);
676
677        // If a secure layer is partially visible, lock-down the screen!
678        if (layer->isSecure() && !visibleRegion.isEmpty()) {
679            secureFrameBuffer = true;
680        }
681    }
682
683    // invalidate the areas where a layer was removed
684    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
685    mDirtyRegionRemovedLayer.clear();
686
687    mSecureFrameBuffer = secureFrameBuffer;
688    opaqueRegion = aboveOpaqueLayers;
689}
690
691
692void SurfaceFlinger::commitTransaction()
693{
694    mDrawingState = mCurrentState;
695    mResizeTransationPending = false;
696    mTransactionCV.broadcast();
697}
698
699void SurfaceFlinger::handlePageFlip()
700{
701    bool visibleRegions = mVisibleRegionsDirty;
702    LayerVector& currentLayers = const_cast<LayerVector&>(
703            mDrawingState.layersSortedByZ);
704    visibleRegions |= lockPageFlip(currentLayers);
705
706        const DisplayHardware& hw = graphicPlane(0).displayHardware();
707        const Region screenRegion(hw.bounds());
708        if (visibleRegions) {
709            Region opaqueRegion;
710            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
711
712            /*
713             *  rebuild the visible layer list
714             */
715            mVisibleLayersSortedByZ.clear();
716            const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
717            size_t count = currentLayers.size();
718            mVisibleLayersSortedByZ.setCapacity(count);
719            for (size_t i=0 ; i<count ; i++) {
720                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
721                    mVisibleLayersSortedByZ.add(currentLayers[i]);
722            }
723
724            mWormholeRegion = screenRegion.subtract(opaqueRegion);
725            mVisibleRegionsDirty = false;
726        }
727
728    unlockPageFlip(currentLayers);
729    mDirtyRegion.andSelf(screenRegion);
730}
731
732bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
733{
734    bool recomputeVisibleRegions = false;
735    size_t count = currentLayers.size();
736    sp<LayerBase> const* layers = currentLayers.array();
737    for (size_t i=0 ; i<count ; i++) {
738        const sp<LayerBase>& layer(layers[i]);
739        layer->lockPageFlip(recomputeVisibleRegions);
740    }
741    return recomputeVisibleRegions;
742}
743
744void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
745{
746    const GraphicPlane& plane(graphicPlane(0));
747    const Transform& planeTransform(plane.transform());
748    size_t count = currentLayers.size();
749    sp<LayerBase> const* layers = currentLayers.array();
750    for (size_t i=0 ; i<count ; i++) {
751        const sp<LayerBase>& layer(layers[i]);
752        layer->unlockPageFlip(planeTransform, mDirtyRegion);
753    }
754}
755
756
757void SurfaceFlinger::handleRepaint()
758{
759    // compute the invalid region
760    mInvalidRegion.orSelf(mDirtyRegion);
761    if (mInvalidRegion.isEmpty()) {
762        // nothing to do
763        return;
764    }
765
766    if (UNLIKELY(mDebugRegion)) {
767        debugFlashRegions();
768    }
769
770    // set the frame buffer
771    const DisplayHardware& hw(graphicPlane(0).displayHardware());
772    glMatrixMode(GL_MODELVIEW);
773    glLoadIdentity();
774
775    uint32_t flags = hw.getFlags();
776    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
777        (flags & DisplayHardware::BUFFER_PRESERVED))
778    {
779        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
780        // takes a rectangle, we must make sure to update that whole
781        // rectangle in that case
782        if (flags & DisplayHardware::SWAP_RECTANGLE) {
783            // TODO: we really should be able to pass a region to
784            // SWAP_RECTANGLE so that we don't have to redraw all this.
785            mDirtyRegion.set(mInvalidRegion.bounds());
786        } else {
787            // in the BUFFER_PRESERVED case, obviously, we can update only
788            // what's needed and nothing more.
789            // NOTE: this is NOT a common case, as preserving the backbuffer
790            // is costly and usually involves copying the whole update back.
791        }
792    } else {
793        if (flags & DisplayHardware::PARTIAL_UPDATES) {
794            // We need to redraw the rectangle that will be updated
795            // (pushed to the framebuffer).
796            // This is needed because PARTIAL_UPDATES only takes one
797            // rectangle instead of a region (see DisplayHardware::flip())
798            mDirtyRegion.set(mInvalidRegion.bounds());
799        } else {
800            // we need to redraw everything (the whole screen)
801            mDirtyRegion.set(hw.bounds());
802            mInvalidRegion = mDirtyRegion;
803        }
804    }
805
806    // compose all surfaces
807    composeSurfaces(mDirtyRegion);
808
809    // clear the dirty regions
810    mDirtyRegion.clear();
811}
812
813void SurfaceFlinger::composeSurfaces(const Region& dirty)
814{
815    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
816        // should never happen unless the window manager has a bug
817        // draw something...
818        drawWormhole();
819    }
820    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
821    const size_t count = layers.size();
822    for (size_t i=0 ; i<count ; ++i) {
823        const sp<LayerBase>& layer(layers[i]);
824        const Region clip(dirty.intersect(layer->visibleRegionScreen));
825        if (!clip.isEmpty()) {
826            layer->draw(clip);
827        }
828    }
829}
830
831void SurfaceFlinger::unlockClients()
832{
833    const LayerVector& drawingLayers(mDrawingState.layersSortedByZ);
834    const size_t count = drawingLayers.size();
835    sp<LayerBase> const* const layers = drawingLayers.array();
836    for (size_t i=0 ; i<count ; ++i) {
837        const sp<LayerBase>& layer = layers[i];
838        layer->finishPageFlip();
839    }
840}
841
842void SurfaceFlinger::debugFlashRegions()
843{
844    const DisplayHardware& hw(graphicPlane(0).displayHardware());
845    const uint32_t flags = hw.getFlags();
846
847    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
848            (flags & DisplayHardware::BUFFER_PRESERVED))) {
849        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
850                mDirtyRegion.bounds() : hw.bounds());
851        composeSurfaces(repaint);
852    }
853
854    TextureManager::deactivateTextures();
855
856    glDisable(GL_BLEND);
857    glDisable(GL_DITHER);
858    glDisable(GL_SCISSOR_TEST);
859
860    static int toggle = 0;
861    toggle = 1 - toggle;
862    if (toggle) {
863        glColor4f(1, 0, 1, 1);
864    } else {
865        glColor4f(1, 1, 0, 1);
866    }
867
868    Region::const_iterator it = mDirtyRegion.begin();
869    Region::const_iterator const end = mDirtyRegion.end();
870    while (it != end) {
871        const Rect& r = *it++;
872        GLfloat vertices[][2] = {
873                { r.left,  r.top },
874                { r.left,  r.bottom },
875                { r.right, r.bottom },
876                { r.right, r.top }
877        };
878        glVertexPointer(2, GL_FLOAT, 0, vertices);
879        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
880    }
881
882    if (mInvalidRegion.isEmpty()) {
883        mDirtyRegion.dump("mDirtyRegion");
884        mInvalidRegion.dump("mInvalidRegion");
885    }
886    hw.flip(mInvalidRegion);
887
888    if (mDebugRegion > 1)
889        usleep(mDebugRegion * 1000);
890
891    glEnable(GL_SCISSOR_TEST);
892    //mDirtyRegion.dump("mDirtyRegion");
893}
894
895void SurfaceFlinger::drawWormhole() const
896{
897    const Region region(mWormholeRegion.intersect(mDirtyRegion));
898    if (region.isEmpty())
899        return;
900
901    const DisplayHardware& hw(graphicPlane(0).displayHardware());
902    const int32_t width = hw.getWidth();
903    const int32_t height = hw.getHeight();
904
905    glDisable(GL_BLEND);
906    glDisable(GL_DITHER);
907
908    if (LIKELY(!mDebugBackground)) {
909        glClearColor(0,0,0,0);
910        Region::const_iterator it = region.begin();
911        Region::const_iterator const end = region.end();
912        while (it != end) {
913            const Rect& r = *it++;
914            const GLint sy = height - (r.top + r.height());
915            glScissor(r.left, sy, r.width(), r.height());
916            glClear(GL_COLOR_BUFFER_BIT);
917        }
918    } else {
919        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
920                { width, height }, { 0, height }  };
921        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
922        glVertexPointer(2, GL_SHORT, 0, vertices);
923        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
924        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
925#if defined(GL_OES_EGL_image_external)
926        if (GLExtensions::getInstance().haveTextureExternal()) {
927            glDisable(GL_TEXTURE_EXTERNAL_OES);
928        }
929#endif
930        glEnable(GL_TEXTURE_2D);
931        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
932        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
933        glMatrixMode(GL_TEXTURE);
934        glLoadIdentity();
935        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
936        Region::const_iterator it = region.begin();
937        Region::const_iterator const end = region.end();
938        while (it != end) {
939            const Rect& r = *it++;
940            const GLint sy = height - (r.top + r.height());
941            glScissor(r.left, sy, r.width(), r.height());
942            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
943        }
944        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
945    }
946}
947
948void SurfaceFlinger::debugShowFPS() const
949{
950    static int mFrameCount;
951    static int mLastFrameCount = 0;
952    static nsecs_t mLastFpsTime = 0;
953    static float mFps = 0;
954    mFrameCount++;
955    nsecs_t now = systemTime();
956    nsecs_t diff = now - mLastFpsTime;
957    if (diff > ms2ns(250)) {
958        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
959        mLastFpsTime = now;
960        mLastFrameCount = mFrameCount;
961    }
962    // XXX: mFPS has the value we want
963 }
964
965status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
966{
967    Mutex::Autolock _l(mStateLock);
968    addLayer_l(layer);
969    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
970    return NO_ERROR;
971}
972
973status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
974{
975    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
976    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
977}
978
979ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
980        const sp<LayerBaseClient>& lbc)
981{
982    Mutex::Autolock _l(mStateLock);
983
984    // attach this layer to the client
985    ssize_t name = client->attachLayer(lbc);
986
987    // add this layer to the current state list
988    addLayer_l(lbc);
989
990    return name;
991}
992
993status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
994{
995    Mutex::Autolock _l(mStateLock);
996    status_t err = purgatorizeLayer_l(layer);
997    if (err == NO_ERROR)
998        setTransactionFlags(eTransactionNeeded);
999    return err;
1000}
1001
1002status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1003{
1004    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1005    if (lbc != 0) {
1006        mLayerMap.removeItem( lbc->getSurface()->asBinder() );
1007    }
1008    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1009    if (index >= 0) {
1010        mLayersRemoved = true;
1011        return NO_ERROR;
1012    }
1013    return status_t(index);
1014}
1015
1016status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1017{
1018    // remove the layer from the main list (through a transaction).
1019    ssize_t err = removeLayer_l(layerBase);
1020
1021    layerBase->onRemoved();
1022
1023    // it's possible that we don't find a layer, because it might
1024    // have been destroyed already -- this is not technically an error
1025    // from the user because there is a race between Client::destroySurface(),
1026    // ~Client() and ~ISurface().
1027    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1028}
1029
1030status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1031{
1032    layer->forceVisibilityTransaction();
1033    setTransactionFlags(eTraversalNeeded);
1034    return NO_ERROR;
1035}
1036
1037uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1038{
1039    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1040}
1041
1042uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1043{
1044    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1045    if ((old & flags)==0) { // wake the server up
1046        signalEvent();
1047    }
1048    return old;
1049}
1050
1051void SurfaceFlinger::openGlobalTransaction()
1052{
1053    android_atomic_inc(&mTransactionCount);
1054}
1055
1056void SurfaceFlinger::closeGlobalTransaction()
1057{
1058    if (android_atomic_dec(&mTransactionCount) == 1) {
1059        signalEvent();
1060
1061        // if there is a transaction with a resize, wait for it to
1062        // take effect before returning.
1063        Mutex::Autolock _l(mStateLock);
1064        while (mResizeTransationPending) {
1065            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1066            if (CC_UNLIKELY(err != NO_ERROR)) {
1067                // just in case something goes wrong in SF, return to the
1068                // called after a few seconds.
1069                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1070                mResizeTransationPending = false;
1071                break;
1072            }
1073        }
1074    }
1075}
1076
1077status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1078{
1079    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1080        return BAD_VALUE;
1081
1082    Mutex::Autolock _l(mStateLock);
1083    mCurrentState.freezeDisplay = 1;
1084    setTransactionFlags(eTransactionNeeded);
1085
1086    // flags is intended to communicate some sort of animation behavior
1087    // (for instance fading)
1088    return NO_ERROR;
1089}
1090
1091status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1092{
1093    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1094        return BAD_VALUE;
1095
1096    Mutex::Autolock _l(mStateLock);
1097    mCurrentState.freezeDisplay = 0;
1098    setTransactionFlags(eTransactionNeeded);
1099
1100    // flags is intended to communicate some sort of animation behavior
1101    // (for instance fading)
1102    return NO_ERROR;
1103}
1104
1105int SurfaceFlinger::setOrientation(DisplayID dpy,
1106        int orientation, uint32_t flags)
1107{
1108    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1109        return BAD_VALUE;
1110
1111    Mutex::Autolock _l(mStateLock);
1112    if (mCurrentState.orientation != orientation) {
1113        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1114            mCurrentState.orientationType = flags;
1115            mCurrentState.orientation = orientation;
1116            setTransactionFlags(eTransactionNeeded);
1117            mTransactionCV.wait(mStateLock);
1118        } else {
1119            orientation = BAD_VALUE;
1120        }
1121    }
1122    return orientation;
1123}
1124
1125sp<ISurface> SurfaceFlinger::createSurface(const sp<Client>& client, int pid,
1126        const String8& name, ISurfaceComposerClient::surface_data_t* params,
1127        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1128        uint32_t flags)
1129{
1130    sp<LayerBaseClient> layer;
1131    sp<LayerBaseClient::Surface> surfaceHandle;
1132
1133    if (int32_t(w|h) < 0) {
1134        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1135                int(w), int(h));
1136        return surfaceHandle;
1137    }
1138
1139    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1140    sp<Layer> normalLayer;
1141    switch (flags & eFXSurfaceMask) {
1142        case eFXSurfaceNormal:
1143            if (UNLIKELY(flags & ePushBuffers)) {
1144                layer = createPushBuffersSurface(client, d, w, h, flags);
1145            } else {
1146                normalLayer = createNormalSurface(client, d, w, h, flags, format);
1147                layer = normalLayer;
1148            }
1149            break;
1150        case eFXSurfaceBlur:
1151            layer = createBlurSurface(client, d, w, h, flags);
1152            break;
1153        case eFXSurfaceDim:
1154            layer = createDimSurface(client, d, w, h, flags);
1155            break;
1156    }
1157
1158    if (layer != 0) {
1159        layer->initStates(w, h, flags);
1160        layer->setName(name);
1161        ssize_t token = addClientLayer(client, layer);
1162
1163        surfaceHandle = layer->getSurface();
1164        if (surfaceHandle != 0) {
1165            params->token = token;
1166            params->identity = surfaceHandle->getIdentity();
1167            params->width = w;
1168            params->height = h;
1169            params->format = format;
1170            if (normalLayer != 0) {
1171                Mutex::Autolock _l(mStateLock);
1172                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1173            }
1174        }
1175
1176        setTransactionFlags(eTransactionNeeded);
1177    }
1178
1179    return surfaceHandle;
1180}
1181
1182sp<Layer> SurfaceFlinger::createNormalSurface(
1183        const sp<Client>& client, DisplayID display,
1184        uint32_t w, uint32_t h, uint32_t flags,
1185        PixelFormat& format)
1186{
1187    // initialize the surfaces
1188    switch (format) { // TODO: take h/w into account
1189    case PIXEL_FORMAT_TRANSPARENT:
1190    case PIXEL_FORMAT_TRANSLUCENT:
1191        format = PIXEL_FORMAT_RGBA_8888;
1192        break;
1193    case PIXEL_FORMAT_OPAQUE:
1194#ifdef NO_RGBX_8888
1195        format = PIXEL_FORMAT_RGB_565;
1196#else
1197        format = PIXEL_FORMAT_RGBX_8888;
1198#endif
1199        break;
1200    }
1201
1202#ifdef NO_RGBX_8888
1203    if (format == PIXEL_FORMAT_RGBX_8888)
1204        format = PIXEL_FORMAT_RGBA_8888;
1205#endif
1206
1207    sp<Layer> layer = new Layer(this, display, client);
1208    status_t err = layer->setBuffers(w, h, format, flags);
1209    if (LIKELY(err != NO_ERROR)) {
1210        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1211        layer.clear();
1212    }
1213    return layer;
1214}
1215
1216sp<LayerBlur> SurfaceFlinger::createBlurSurface(
1217        const sp<Client>& client, DisplayID display,
1218        uint32_t w, uint32_t h, uint32_t flags)
1219{
1220    sp<LayerBlur> layer = new LayerBlur(this, display, client);
1221    layer->initStates(w, h, flags);
1222    return layer;
1223}
1224
1225sp<LayerDim> SurfaceFlinger::createDimSurface(
1226        const sp<Client>& client, DisplayID display,
1227        uint32_t w, uint32_t h, uint32_t flags)
1228{
1229    sp<LayerDim> layer = new LayerDim(this, display, client);
1230    layer->initStates(w, h, flags);
1231    return layer;
1232}
1233
1234sp<LayerBuffer> SurfaceFlinger::createPushBuffersSurface(
1235        const sp<Client>& client, DisplayID display,
1236        uint32_t w, uint32_t h, uint32_t flags)
1237{
1238    sp<LayerBuffer> layer = new LayerBuffer(this, display, client);
1239    layer->initStates(w, h, flags);
1240    return layer;
1241}
1242
1243status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1244{
1245    /*
1246     * called by the window manager, when a surface should be marked for
1247     * destruction.
1248     *
1249     * The surface is removed from the current and drawing lists, but placed
1250     * in the purgatory queue, so it's not destroyed right-away (we need
1251     * to wait for all client's references to go away first).
1252     */
1253
1254    status_t err = NAME_NOT_FOUND;
1255    Mutex::Autolock _l(mStateLock);
1256    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1257    if (layer != 0) {
1258        err = purgatorizeLayer_l(layer);
1259        if (err == NO_ERROR) {
1260            setTransactionFlags(eTransactionNeeded);
1261        }
1262    }
1263    return err;
1264}
1265
1266status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1267{
1268    // called by ~ISurface() when all references are gone
1269
1270    class MessageDestroySurface : public MessageBase {
1271        SurfaceFlinger* flinger;
1272        sp<LayerBaseClient> layer;
1273    public:
1274        MessageDestroySurface(
1275                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1276            : flinger(flinger), layer(layer) { }
1277        virtual bool handler() {
1278            sp<LayerBaseClient> l(layer);
1279            layer.clear(); // clear it outside of the lock;
1280            Mutex::Autolock _l(flinger->mStateLock);
1281            /*
1282             * remove the layer from the current list -- chances are that it's
1283             * not in the list anyway, because it should have been removed
1284             * already upon request of the client (eg: window manager).
1285             * However, a buggy client could have not done that.
1286             * Since we know we don't have any more clients, we don't need
1287             * to use the purgatory.
1288             */
1289            status_t err = flinger->removeLayer_l(l);
1290            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1291                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1292            return true;
1293        }
1294    };
1295
1296    postMessageAsync( new MessageDestroySurface(this, layer) );
1297    return NO_ERROR;
1298}
1299
1300status_t SurfaceFlinger::setClientState(
1301        const sp<Client>& client,
1302        int32_t count,
1303        const layer_state_t* states)
1304{
1305    Mutex::Autolock _l(mStateLock);
1306    uint32_t flags = 0;
1307    for (int i=0 ; i<count ; i++) {
1308        const layer_state_t& s(states[i]);
1309        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1310        if (layer != 0) {
1311            const uint32_t what = s.what;
1312            if (what & ePositionChanged) {
1313                if (layer->setPosition(s.x, s.y))
1314                    flags |= eTraversalNeeded;
1315            }
1316            if (what & eLayerChanged) {
1317                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1318                if (layer->setLayer(s.z)) {
1319                    mCurrentState.layersSortedByZ.removeAt(idx);
1320                    mCurrentState.layersSortedByZ.add(layer);
1321                    // we need traversal (state changed)
1322                    // AND transaction (list changed)
1323                    flags |= eTransactionNeeded|eTraversalNeeded;
1324                }
1325            }
1326            if (what & eSizeChanged) {
1327                if (layer->setSize(s.w, s.h)) {
1328                    flags |= eTraversalNeeded;
1329                    mResizeTransationPending = true;
1330                }
1331            }
1332            if (what & eAlphaChanged) {
1333                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1334                    flags |= eTraversalNeeded;
1335            }
1336            if (what & eMatrixChanged) {
1337                if (layer->setMatrix(s.matrix))
1338                    flags |= eTraversalNeeded;
1339            }
1340            if (what & eTransparentRegionChanged) {
1341                if (layer->setTransparentRegionHint(s.transparentRegion))
1342                    flags |= eTraversalNeeded;
1343            }
1344            if (what & eVisibilityChanged) {
1345                if (layer->setFlags(s.flags, s.mask))
1346                    flags |= eTraversalNeeded;
1347            }
1348        }
1349    }
1350    if (flags) {
1351        setTransactionFlags(flags);
1352    }
1353    return NO_ERROR;
1354}
1355
1356void SurfaceFlinger::screenReleased(int dpy)
1357{
1358    // this may be called by a signal handler, we can't do too much in here
1359    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1360    signalEvent();
1361}
1362
1363void SurfaceFlinger::screenAcquired(int dpy)
1364{
1365    // this may be called by a signal handler, we can't do too much in here
1366    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1367    signalEvent();
1368}
1369
1370status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1371{
1372    const size_t SIZE = 1024;
1373    char buffer[SIZE];
1374    String8 result;
1375    if (!mDump.checkCalling()) {
1376        snprintf(buffer, SIZE, "Permission Denial: "
1377                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1378                IPCThreadState::self()->getCallingPid(),
1379                IPCThreadState::self()->getCallingUid());
1380        result.append(buffer);
1381    } else {
1382
1383        // figure out if we're stuck somewhere
1384        const nsecs_t now = systemTime();
1385        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1386        const nsecs_t inTransaction(mDebugInTransaction);
1387        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1388        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1389
1390        // Try to get the main lock, but don't insist if we can't
1391        // (this would indicate SF is stuck, but we want to be able to
1392        // print something in dumpsys).
1393        int retry = 3;
1394        while (mStateLock.tryLock()<0 && --retry>=0) {
1395            usleep(1000000);
1396        }
1397        const bool locked(retry >= 0);
1398        if (!locked) {
1399            snprintf(buffer, SIZE,
1400                    "SurfaceFlinger appears to be unresponsive, "
1401                    "dumping anyways (no locks held)\n");
1402            result.append(buffer);
1403        }
1404
1405        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1406        const size_t count = currentLayers.size();
1407        for (size_t i=0 ; i<count ; i++) {
1408            const sp<LayerBase>& layer(currentLayers[i]);
1409            layer->dump(result, buffer, SIZE);
1410            const Layer::State& s(layer->drawingState());
1411            s.transparentRegion.dump(result, "transparentRegion");
1412            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1413            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1414        }
1415
1416        mWormholeRegion.dump(result, "WormholeRegion");
1417        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1418        snprintf(buffer, SIZE,
1419                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1420                mFreezeDisplay?"yes":"no", mFreezeCount,
1421                mCurrentState.orientation, hw.canDraw());
1422        result.append(buffer);
1423        snprintf(buffer, SIZE,
1424                "  last eglSwapBuffers() time: %f us\n"
1425                "  last transaction time     : %f us\n",
1426                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1427        result.append(buffer);
1428
1429        if (inSwapBuffersDuration || !locked) {
1430            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1431                    inSwapBuffersDuration/1000.0);
1432            result.append(buffer);
1433        }
1434
1435        if (inTransactionDuration || !locked) {
1436            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1437                    inTransactionDuration/1000.0);
1438            result.append(buffer);
1439        }
1440
1441        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1442        alloc.dump(result);
1443
1444        if (locked) {
1445            mStateLock.unlock();
1446        }
1447    }
1448    write(fd, result.string(), result.size());
1449    return NO_ERROR;
1450}
1451
1452status_t SurfaceFlinger::onTransact(
1453    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1454{
1455    switch (code) {
1456        case CREATE_CONNECTION:
1457        case OPEN_GLOBAL_TRANSACTION:
1458        case CLOSE_GLOBAL_TRANSACTION:
1459        case SET_ORIENTATION:
1460        case FREEZE_DISPLAY:
1461        case UNFREEZE_DISPLAY:
1462        case BOOT_FINISHED:
1463        case TURN_ELECTRON_BEAM_OFF:
1464        case TURN_ELECTRON_BEAM_ON:
1465        {
1466            // codes that require permission check
1467            IPCThreadState* ipc = IPCThreadState::self();
1468            const int pid = ipc->getCallingPid();
1469            const int uid = ipc->getCallingUid();
1470            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1471                LOGE("Permission Denial: "
1472                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1473                return PERMISSION_DENIED;
1474            }
1475            break;
1476        }
1477        case CAPTURE_SCREEN:
1478        {
1479            // codes that require permission check
1480            IPCThreadState* ipc = IPCThreadState::self();
1481            const int pid = ipc->getCallingPid();
1482            const int uid = ipc->getCallingUid();
1483            if ((uid != AID_GRAPHICS) && !mReadFramebuffer.check(pid, uid)) {
1484                LOGE("Permission Denial: "
1485                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1486                return PERMISSION_DENIED;
1487            }
1488            break;
1489        }
1490    }
1491
1492    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1493    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1494        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1495        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1496            IPCThreadState* ipc = IPCThreadState::self();
1497            const int pid = ipc->getCallingPid();
1498            const int uid = ipc->getCallingUid();
1499            LOGE("Permission Denial: "
1500                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1501            return PERMISSION_DENIED;
1502        }
1503        int n;
1504        switch (code) {
1505            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1506            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1507                return NO_ERROR;
1508            case 1002:  // SHOW_UPDATES
1509                n = data.readInt32();
1510                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1511                return NO_ERROR;
1512            case 1003:  // SHOW_BACKGROUND
1513                n = data.readInt32();
1514                mDebugBackground = n ? 1 : 0;
1515                return NO_ERROR;
1516            case 1004:{ // repaint everything
1517                Mutex::Autolock _l(mStateLock);
1518                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1519                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1520                signalEvent();
1521                return NO_ERROR;
1522            }
1523            case 1005:{ // force transaction
1524                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1525                return NO_ERROR;
1526            }
1527            case 1006:{ // enable/disable GraphicLog
1528                int enabled = data.readInt32();
1529                GraphicLog::getInstance().setEnabled(enabled);
1530                return NO_ERROR;
1531            }
1532            case 1007: // set mFreezeCount
1533                mFreezeCount = data.readInt32();
1534                mFreezeDisplayTime = 0;
1535                return NO_ERROR;
1536            case 1010:  // interrogate.
1537                reply->writeInt32(0);
1538                reply->writeInt32(0);
1539                reply->writeInt32(mDebugRegion);
1540                reply->writeInt32(mDebugBackground);
1541                return NO_ERROR;
1542            case 1013: {
1543                Mutex::Autolock _l(mStateLock);
1544                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1545                reply->writeInt32(hw.getPageFlipCount());
1546            }
1547            return NO_ERROR;
1548        }
1549    }
1550    return err;
1551}
1552
1553// ---------------------------------------------------------------------------
1554
1555status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1556        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1557{
1558    if (!GLExtensions::getInstance().haveFramebufferObject())
1559        return INVALID_OPERATION;
1560
1561    // get screen geometry
1562    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1563    const uint32_t hw_w = hw.getWidth();
1564    const uint32_t hw_h = hw.getHeight();
1565    GLfloat u = 1;
1566    GLfloat v = 1;
1567
1568    // make sure to clear all GL error flags
1569    while ( glGetError() != GL_NO_ERROR ) ;
1570
1571    // create a FBO
1572    GLuint name, tname;
1573    glGenTextures(1, &tname);
1574    glBindTexture(GL_TEXTURE_2D, tname);
1575    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1576            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1577    if (glGetError() != GL_NO_ERROR) {
1578        while ( glGetError() != GL_NO_ERROR ) ;
1579        GLint tw = (2 << (31 - clz(hw_w)));
1580        GLint th = (2 << (31 - clz(hw_h)));
1581        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1582                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1583        u = GLfloat(hw_w) / tw;
1584        v = GLfloat(hw_h) / th;
1585    }
1586    glGenFramebuffersOES(1, &name);
1587    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1588    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1589            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1590
1591    // redraw the screen entirely...
1592    glClearColor(0,0,0,1);
1593    glClear(GL_COLOR_BUFFER_BIT);
1594    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1595    const size_t count = layers.size();
1596    for (size_t i=0 ; i<count ; ++i) {
1597        const sp<LayerBase>& layer(layers[i]);
1598        layer->drawForSreenShot();
1599    }
1600
1601    // back to main framebuffer
1602    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1603    glDisable(GL_SCISSOR_TEST);
1604    glDeleteFramebuffersOES(1, &name);
1605
1606    *textureName = tname;
1607    *uOut = u;
1608    *vOut = v;
1609    return NO_ERROR;
1610}
1611
1612// ---------------------------------------------------------------------------
1613
1614status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1615{
1616    status_t result = PERMISSION_DENIED;
1617
1618    if (!GLExtensions::getInstance().haveFramebufferObject())
1619        return INVALID_OPERATION;
1620
1621    // get screen geometry
1622    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1623    const uint32_t hw_w = hw.getWidth();
1624    const uint32_t hw_h = hw.getHeight();
1625    const Region screenBounds(hw.bounds());
1626
1627    GLfloat u, v;
1628    GLuint tname;
1629    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1630    if (result != NO_ERROR) {
1631        return result;
1632    }
1633
1634    GLfloat vtx[8];
1635    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1636    glEnable(GL_TEXTURE_2D);
1637    glBindTexture(GL_TEXTURE_2D, tname);
1638    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1639    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1640    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1641    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1642    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1643    glVertexPointer(2, GL_FLOAT, 0, vtx);
1644
1645    class s_curve_interpolator {
1646        const float nbFrames, s, v;
1647    public:
1648        s_curve_interpolator(int nbFrames, float s)
1649        : nbFrames(1.0f / (nbFrames-1)), s(s),
1650          v(1.0f + expf(-s + 0.5f*s)) {
1651        }
1652        float operator()(int f) {
1653            const float x = f * nbFrames;
1654            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1655        }
1656    };
1657
1658    class v_stretch {
1659        const GLfloat hw_w, hw_h;
1660    public:
1661        v_stretch(uint32_t hw_w, uint32_t hw_h)
1662        : hw_w(hw_w), hw_h(hw_h) {
1663        }
1664        void operator()(GLfloat* vtx, float v) {
1665            const GLfloat w = hw_w + (hw_w * v);
1666            const GLfloat h = hw_h - (hw_h * v);
1667            const GLfloat x = (hw_w - w) * 0.5f;
1668            const GLfloat y = (hw_h - h) * 0.5f;
1669            vtx[0] = x;         vtx[1] = y;
1670            vtx[2] = x;         vtx[3] = y + h;
1671            vtx[4] = x + w;     vtx[5] = y + h;
1672            vtx[6] = x + w;     vtx[7] = y;
1673        }
1674    };
1675
1676    class h_stretch {
1677        const GLfloat hw_w, hw_h;
1678    public:
1679        h_stretch(uint32_t hw_w, uint32_t hw_h)
1680        : hw_w(hw_w), hw_h(hw_h) {
1681        }
1682        void operator()(GLfloat* vtx, float v) {
1683            const GLfloat w = hw_w - (hw_w * v);
1684            const GLfloat h = 1.0f;
1685            const GLfloat x = (hw_w - w) * 0.5f;
1686            const GLfloat y = (hw_h - h) * 0.5f;
1687            vtx[0] = x;         vtx[1] = y;
1688            vtx[2] = x;         vtx[3] = y + h;
1689            vtx[4] = x + w;     vtx[5] = y + h;
1690            vtx[6] = x + w;     vtx[7] = y;
1691        }
1692    };
1693
1694    // the full animation is 24 frames
1695    const int nbFrames = 12;
1696    s_curve_interpolator itr(nbFrames, 7.5f);
1697    s_curve_interpolator itg(nbFrames, 8.0f);
1698    s_curve_interpolator itb(nbFrames, 8.5f);
1699
1700    v_stretch vverts(hw_w, hw_h);
1701    glEnable(GL_BLEND);
1702    glBlendFunc(GL_ONE, GL_ONE);
1703    for (int i=0 ; i<nbFrames ; i++) {
1704        float x, y, w, h;
1705        const float vr = itr(i);
1706        const float vg = itg(i);
1707        const float vb = itb(i);
1708
1709        // clear screen
1710        glColorMask(1,1,1,1);
1711        glClear(GL_COLOR_BUFFER_BIT);
1712        glEnable(GL_TEXTURE_2D);
1713
1714        // draw the red plane
1715        vverts(vtx, vr);
1716        glColorMask(1,0,0,1);
1717        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1718
1719        // draw the green plane
1720        vverts(vtx, vg);
1721        glColorMask(0,1,0,1);
1722        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1723
1724        // draw the blue plane
1725        vverts(vtx, vb);
1726        glColorMask(0,0,1,1);
1727        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1728
1729        // draw the white highlight (we use the last vertices)
1730        glDisable(GL_TEXTURE_2D);
1731        glColorMask(1,1,1,1);
1732        glColor4f(vg, vg, vg, 1);
1733        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1734        hw.flip(screenBounds);
1735    }
1736
1737    h_stretch hverts(hw_w, hw_h);
1738    glDisable(GL_BLEND);
1739    glDisable(GL_TEXTURE_2D);
1740    glColorMask(1,1,1,1);
1741    for (int i=0 ; i<nbFrames ; i++) {
1742        const float v = itg(i);
1743        hverts(vtx, v);
1744        glClear(GL_COLOR_BUFFER_BIT);
1745        glColor4f(1-v, 1-v, 1-v, 1);
1746        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1747        hw.flip(screenBounds);
1748    }
1749
1750    glColorMask(1,1,1,1);
1751    glEnable(GL_SCISSOR_TEST);
1752    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1753    glDeleteTextures(1, &tname);
1754    return NO_ERROR;
1755}
1756
1757status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1758{
1759    status_t result = PERMISSION_DENIED;
1760
1761    if (!GLExtensions::getInstance().haveFramebufferObject())
1762        return INVALID_OPERATION;
1763
1764
1765    // get screen geometry
1766    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1767    const uint32_t hw_w = hw.getWidth();
1768    const uint32_t hw_h = hw.getHeight();
1769    const Region screenBounds(hw.bounds());
1770
1771    GLfloat u, v;
1772    GLuint tname;
1773    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1774    if (result != NO_ERROR) {
1775        return result;
1776    }
1777
1778    // back to main framebuffer
1779    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1780    glDisable(GL_SCISSOR_TEST);
1781
1782    GLfloat vtx[8];
1783    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1784    glEnable(GL_TEXTURE_2D);
1785    glBindTexture(GL_TEXTURE_2D, tname);
1786    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1787    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1788    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1789    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1790    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1791    glVertexPointer(2, GL_FLOAT, 0, vtx);
1792
1793    class s_curve_interpolator {
1794        const float nbFrames, s, v;
1795    public:
1796        s_curve_interpolator(int nbFrames, float s)
1797        : nbFrames(1.0f / (nbFrames-1)), s(s),
1798          v(1.0f + expf(-s + 0.5f*s)) {
1799        }
1800        float operator()(int f) {
1801            const float x = f * nbFrames;
1802            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1803        }
1804    };
1805
1806    class v_stretch {
1807        const GLfloat hw_w, hw_h;
1808    public:
1809        v_stretch(uint32_t hw_w, uint32_t hw_h)
1810        : hw_w(hw_w), hw_h(hw_h) {
1811        }
1812        void operator()(GLfloat* vtx, float v) {
1813            const GLfloat w = hw_w + (hw_w * v);
1814            const GLfloat h = hw_h - (hw_h * v);
1815            const GLfloat x = (hw_w - w) * 0.5f;
1816            const GLfloat y = (hw_h - h) * 0.5f;
1817            vtx[0] = x;         vtx[1] = y;
1818            vtx[2] = x;         vtx[3] = y + h;
1819            vtx[4] = x + w;     vtx[5] = y + h;
1820            vtx[6] = x + w;     vtx[7] = y;
1821        }
1822    };
1823
1824    class h_stretch {
1825        const GLfloat hw_w, hw_h;
1826    public:
1827        h_stretch(uint32_t hw_w, uint32_t hw_h)
1828        : hw_w(hw_w), hw_h(hw_h) {
1829        }
1830        void operator()(GLfloat* vtx, float v) {
1831            const GLfloat w = hw_w - (hw_w * v);
1832            const GLfloat h = 1.0f;
1833            const GLfloat x = (hw_w - w) * 0.5f;
1834            const GLfloat y = (hw_h - h) * 0.5f;
1835            vtx[0] = x;         vtx[1] = y;
1836            vtx[2] = x;         vtx[3] = y + h;
1837            vtx[4] = x + w;     vtx[5] = y + h;
1838            vtx[6] = x + w;     vtx[7] = y;
1839        }
1840    };
1841
1842    // the full animation is 12 frames
1843    int nbFrames = 8;
1844    s_curve_interpolator itr(nbFrames, 7.5f);
1845    s_curve_interpolator itg(nbFrames, 8.0f);
1846    s_curve_interpolator itb(nbFrames, 8.5f);
1847
1848    h_stretch hverts(hw_w, hw_h);
1849    glDisable(GL_BLEND);
1850    glDisable(GL_TEXTURE_2D);
1851    glColorMask(1,1,1,1);
1852    for (int i=nbFrames-1 ; i>=0 ; i--) {
1853        const float v = itg(i);
1854        hverts(vtx, v);
1855        glClear(GL_COLOR_BUFFER_BIT);
1856        glColor4f(1-v, 1-v, 1-v, 1);
1857        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1858        hw.flip(screenBounds);
1859    }
1860
1861    nbFrames = 4;
1862    v_stretch vverts(hw_w, hw_h);
1863    glEnable(GL_BLEND);
1864    glBlendFunc(GL_ONE, GL_ONE);
1865    for (int i=nbFrames-1 ; i>=0 ; i--) {
1866        float x, y, w, h;
1867        const float vr = itr(i);
1868        const float vg = itg(i);
1869        const float vb = itb(i);
1870
1871        // clear screen
1872        glColorMask(1,1,1,1);
1873        glClear(GL_COLOR_BUFFER_BIT);
1874        glEnable(GL_TEXTURE_2D);
1875
1876        // draw the red plane
1877        vverts(vtx, vr);
1878        glColorMask(1,0,0,1);
1879        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1880
1881        // draw the green plane
1882        vverts(vtx, vg);
1883        glColorMask(0,1,0,1);
1884        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1885
1886        // draw the blue plane
1887        vverts(vtx, vb);
1888        glColorMask(0,0,1,1);
1889        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1890
1891        hw.flip(screenBounds);
1892    }
1893
1894    glColorMask(1,1,1,1);
1895    glEnable(GL_SCISSOR_TEST);
1896    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1897    glDeleteTextures(1, &tname);
1898
1899    return NO_ERROR;
1900}
1901
1902// ---------------------------------------------------------------------------
1903
1904status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
1905{
1906    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
1907    if (!hw.canDraw()) {
1908        // we're already off
1909        return NO_ERROR;
1910    }
1911    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
1912        electronBeamOffAnimationImplLocked();
1913    }
1914
1915    // always clear the whole screen at the end of the animation
1916    glClearColor(0,0,0,1);
1917    glDisable(GL_SCISSOR_TEST);
1918    glClear(GL_COLOR_BUFFER_BIT);
1919    glEnable(GL_SCISSOR_TEST);
1920    hw.flip( Region(hw.bounds()) );
1921
1922    hw.setCanDraw(false);
1923    return NO_ERROR;
1924}
1925
1926status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
1927{
1928    class MessageTurnElectronBeamOff : public MessageBase {
1929        SurfaceFlinger* flinger;
1930        int32_t mode;
1931        status_t result;
1932    public:
1933        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
1934            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
1935        }
1936        status_t getResult() const {
1937            return result;
1938        }
1939        virtual bool handler() {
1940            Mutex::Autolock _l(flinger->mStateLock);
1941            result = flinger->turnElectronBeamOffImplLocked(mode);
1942            return true;
1943        }
1944    };
1945
1946    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
1947    status_t res = postMessageSync(msg);
1948    if (res == NO_ERROR) {
1949        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
1950
1951        // work-around: when the power-manager calls us we activate the
1952        // animation. eventually, the "on" animation will be called
1953        // by the power-manager itself
1954        mElectronBeamAnimationMode = mode;
1955    }
1956    return res;
1957}
1958
1959// ---------------------------------------------------------------------------
1960
1961status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
1962{
1963    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
1964    if (hw.canDraw()) {
1965        // we're already on
1966        return NO_ERROR;
1967    }
1968    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
1969        electronBeamOnAnimationImplLocked();
1970    }
1971    hw.setCanDraw(true);
1972
1973    // make sure to redraw the whole screen when the animation is done
1974    mDirtyRegion.set(hw.bounds());
1975    signalEvent();
1976
1977    return NO_ERROR;
1978}
1979
1980status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
1981{
1982    class MessageTurnElectronBeamOn : public MessageBase {
1983        SurfaceFlinger* flinger;
1984        int32_t mode;
1985        status_t result;
1986    public:
1987        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
1988            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
1989        }
1990        status_t getResult() const {
1991            return result;
1992        }
1993        virtual bool handler() {
1994            Mutex::Autolock _l(flinger->mStateLock);
1995            result = flinger->turnElectronBeamOnImplLocked(mode);
1996            return true;
1997        }
1998    };
1999
2000    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2001    return NO_ERROR;
2002}
2003
2004// ---------------------------------------------------------------------------
2005
2006status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2007        sp<IMemoryHeap>* heap,
2008        uint32_t* w, uint32_t* h, PixelFormat* f,
2009        uint32_t sw, uint32_t sh)
2010{
2011    status_t result = PERMISSION_DENIED;
2012
2013    // only one display supported for now
2014    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2015        return BAD_VALUE;
2016
2017    if (!GLExtensions::getInstance().haveFramebufferObject())
2018        return INVALID_OPERATION;
2019
2020    // get screen geometry
2021    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2022    const uint32_t hw_w = hw.getWidth();
2023    const uint32_t hw_h = hw.getHeight();
2024
2025    if ((sw > hw_w) || (sh > hw_h))
2026        return BAD_VALUE;
2027
2028    sw = (!sw) ? hw_w : sw;
2029    sh = (!sh) ? hw_h : sh;
2030    const size_t size = sw * sh * 4;
2031
2032    // make sure to clear all GL error flags
2033    while ( glGetError() != GL_NO_ERROR ) ;
2034
2035    // create a FBO
2036    GLuint name, tname;
2037    glGenRenderbuffersOES(1, &tname);
2038    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2039    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2040    glGenFramebuffersOES(1, &name);
2041    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2042    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2043            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2044
2045    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2046    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2047
2048        // invert everything, b/c glReadPixel() below will invert the FB
2049        glViewport(0, 0, sw, sh);
2050        glMatrixMode(GL_PROJECTION);
2051        glPushMatrix();
2052        glLoadIdentity();
2053        glOrthof(0, hw_w, 0, hw_h, 0, 1);
2054        glMatrixMode(GL_MODELVIEW);
2055
2056        // redraw the screen entirely...
2057        glClearColor(0,0,0,1);
2058        glClear(GL_COLOR_BUFFER_BIT);
2059        const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2060        const size_t count = layers.size();
2061        for (size_t i=0 ; i<count ; ++i) {
2062            const sp<LayerBase>& layer(layers[i]);
2063            layer->drawForSreenShot();
2064        }
2065
2066        // XXX: this is needed on tegra
2067        glScissor(0, 0, sw, sh);
2068
2069        // check for errors and return screen capture
2070        if (glGetError() != GL_NO_ERROR) {
2071            // error while rendering
2072            result = INVALID_OPERATION;
2073        } else {
2074            // allocate shared memory large enough to hold the
2075            // screen capture
2076            sp<MemoryHeapBase> base(
2077                    new MemoryHeapBase(size, 0, "screen-capture") );
2078            void* const ptr = base->getBase();
2079            if (ptr) {
2080                // capture the screen with glReadPixels()
2081                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2082                if (glGetError() == GL_NO_ERROR) {
2083                    *heap = base;
2084                    *w = sw;
2085                    *h = sh;
2086                    *f = PIXEL_FORMAT_RGBA_8888;
2087                    result = NO_ERROR;
2088                }
2089            } else {
2090                result = NO_MEMORY;
2091            }
2092        }
2093
2094        glEnable(GL_SCISSOR_TEST);
2095        glViewport(0, 0, hw_w, hw_h);
2096        glMatrixMode(GL_PROJECTION);
2097        glPopMatrix();
2098        glMatrixMode(GL_MODELVIEW);
2099
2100
2101    } else {
2102        result = BAD_VALUE;
2103    }
2104
2105    // release FBO resources
2106    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2107    glDeleteRenderbuffersOES(1, &tname);
2108    glDeleteFramebuffersOES(1, &name);
2109    return result;
2110}
2111
2112
2113status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2114        sp<IMemoryHeap>* heap,
2115        uint32_t* width, uint32_t* height, PixelFormat* format,
2116        uint32_t sw, uint32_t sh)
2117{
2118    // only one display supported for now
2119    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2120        return BAD_VALUE;
2121
2122    if (!GLExtensions::getInstance().haveFramebufferObject())
2123        return INVALID_OPERATION;
2124
2125    class MessageCaptureScreen : public MessageBase {
2126        SurfaceFlinger* flinger;
2127        DisplayID dpy;
2128        sp<IMemoryHeap>* heap;
2129        uint32_t* w;
2130        uint32_t* h;
2131        PixelFormat* f;
2132        uint32_t sw;
2133        uint32_t sh;
2134        status_t result;
2135    public:
2136        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2137                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2138                uint32_t sw, uint32_t sh)
2139            : flinger(flinger), dpy(dpy),
2140              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh), result(PERMISSION_DENIED)
2141        {
2142        }
2143        status_t getResult() const {
2144            return result;
2145        }
2146        virtual bool handler() {
2147            Mutex::Autolock _l(flinger->mStateLock);
2148
2149            // if we have secure windows, never allow the screen capture
2150            if (flinger->mSecureFrameBuffer)
2151                return true;
2152
2153            result = flinger->captureScreenImplLocked(dpy,
2154                    heap, w, h, f, sw, sh);
2155
2156            return true;
2157        }
2158    };
2159
2160    sp<MessageBase> msg = new MessageCaptureScreen(this,
2161            dpy, heap, width, height, format, sw, sh);
2162    status_t res = postMessageSync(msg);
2163    if (res == NO_ERROR) {
2164        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2165    }
2166    return res;
2167}
2168
2169// ---------------------------------------------------------------------------
2170
2171sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2172{
2173    sp<Layer> result;
2174    Mutex::Autolock _l(mStateLock);
2175    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2176    return result;
2177}
2178
2179// ---------------------------------------------------------------------------
2180
2181Client::Client(const sp<SurfaceFlinger>& flinger)
2182    : mFlinger(flinger), mNameGenerator(1)
2183{
2184}
2185
2186Client::~Client()
2187{
2188    const size_t count = mLayers.size();
2189    for (size_t i=0 ; i<count ; i++) {
2190        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2191        if (layer != 0) {
2192            mFlinger->removeLayer(layer);
2193        }
2194    }
2195}
2196
2197status_t Client::initCheck() const {
2198    return NO_ERROR;
2199}
2200
2201ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2202{
2203    int32_t name = android_atomic_inc(&mNameGenerator);
2204    mLayers.add(name, layer);
2205    return name;
2206}
2207
2208void Client::detachLayer(const LayerBaseClient* layer)
2209{
2210    // we do a linear search here, because this doesn't happen often
2211    const size_t count = mLayers.size();
2212    for (size_t i=0 ; i<count ; i++) {
2213        if (mLayers.valueAt(i) == layer) {
2214            mLayers.removeItemsAt(i, 1);
2215            break;
2216        }
2217    }
2218}
2219sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
2220    sp<LayerBaseClient> lbc;
2221    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
2222    if (layer != 0) {
2223        lbc = layer.promote();
2224        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2225    }
2226    return lbc;
2227}
2228
2229sp<IMemoryHeap> Client::getControlBlock() const {
2230    return 0;
2231}
2232ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
2233    return -1;
2234}
2235sp<ISurface> Client::createSurface(
2236        ISurfaceComposerClient::surface_data_t* params, int pid,
2237        const String8& name,
2238        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2239        uint32_t flags)
2240{
2241    return mFlinger->createSurface(this, pid, name, params,
2242            display, w, h, format, flags);
2243}
2244status_t Client::destroySurface(SurfaceID sid) {
2245    return mFlinger->removeSurface(this, sid);
2246}
2247status_t Client::setState(int32_t count, const layer_state_t* states) {
2248    return mFlinger->setClientState(this, count, states);
2249}
2250
2251// ---------------------------------------------------------------------------
2252
2253UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
2254    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
2255{
2256    const int pgsize = getpagesize();
2257    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
2258
2259    mCblkHeap = new MemoryHeapBase(cblksize, 0,
2260            "SurfaceFlinger Client control-block");
2261
2262    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
2263    if (ctrlblk) { // construct the shared structure in-place.
2264        new(ctrlblk) SharedClient;
2265    }
2266}
2267
2268UserClient::~UserClient()
2269{
2270    if (ctrlblk) {
2271        ctrlblk->~SharedClient();  // destroy our shared-structure.
2272    }
2273
2274    /*
2275     * When a UserClient dies, it's unclear what to do exactly.
2276     * We could go ahead and destroy all surfaces linked to that client
2277     * however, it wouldn't be fair to the main Client
2278     * (usually the the window-manager), which might want to re-target
2279     * the layer to another UserClient.
2280     * I think the best is to do nothing, or not much; in most cases the
2281     * WM itself will go ahead and clean things up when it detects a client of
2282     * his has died.
2283     * The remaining question is what to display? currently we keep
2284     * just keep the current buffer.
2285     */
2286}
2287
2288status_t UserClient::initCheck() const {
2289    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
2290}
2291
2292void UserClient::detachLayer(const Layer* layer)
2293{
2294    int32_t name = layer->getToken();
2295    if (name >= 0) {
2296        int32_t mask = 1LU<<name;
2297        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
2298            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
2299        }
2300    }
2301}
2302
2303sp<IMemoryHeap> UserClient::getControlBlock() const {
2304    return mCblkHeap;
2305}
2306
2307ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
2308{
2309    int32_t name = NAME_NOT_FOUND;
2310    sp<Layer> layer(mFlinger->getLayer(sur));
2311    if (layer == 0) return name;
2312
2313    // if this layer already has a token, just return it
2314    name = layer->getToken();
2315    if ((name >= 0) && (layer->getClient() == this))
2316        return name;
2317
2318    name = 0;
2319    do {
2320        int32_t mask = 1LU<<name;
2321        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
2322            // we found and locked that name
2323            status_t err = layer->setToken(
2324                    const_cast<UserClient*>(this), ctrlblk, name);
2325            if (err != NO_ERROR) {
2326                // free the name
2327                android_atomic_and(~mask, &mBitmap);
2328                name = err;
2329            }
2330            break;
2331        }
2332        if (++name > 31)
2333            name = NO_MEMORY;
2334    } while(name >= 0);
2335
2336    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
2337    //        sur->asBinder().get(), name, this, mBitmap);
2338    return name;
2339}
2340
2341sp<ISurface> UserClient::createSurface(
2342        ISurfaceComposerClient::surface_data_t* params, int pid,
2343        const String8& name,
2344        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2345        uint32_t flags) {
2346    return 0;
2347}
2348status_t UserClient::destroySurface(SurfaceID sid) {
2349    return INVALID_OPERATION;
2350}
2351status_t UserClient::setState(int32_t count, const layer_state_t* states) {
2352    return INVALID_OPERATION;
2353}
2354
2355// ---------------------------------------------------------------------------
2356
2357GraphicPlane::GraphicPlane()
2358    : mHw(0)
2359{
2360}
2361
2362GraphicPlane::~GraphicPlane() {
2363    delete mHw;
2364}
2365
2366bool GraphicPlane::initialized() const {
2367    return mHw ? true : false;
2368}
2369
2370int GraphicPlane::getWidth() const {
2371    return mWidth;
2372}
2373
2374int GraphicPlane::getHeight() const {
2375    return mHeight;
2376}
2377
2378void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2379{
2380    mHw = hw;
2381
2382    // initialize the display orientation transform.
2383    // it's a constant that should come from the display driver.
2384    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2385    char property[PROPERTY_VALUE_MAX];
2386    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2387        //displayOrientation
2388        switch (atoi(property)) {
2389        case 90:
2390            displayOrientation = ISurfaceComposer::eOrientation90;
2391            break;
2392        case 270:
2393            displayOrientation = ISurfaceComposer::eOrientation270;
2394            break;
2395        }
2396    }
2397
2398    const float w = hw->getWidth();
2399    const float h = hw->getHeight();
2400    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2401            &mDisplayTransform);
2402    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2403        mDisplayWidth = h;
2404        mDisplayHeight = w;
2405    } else {
2406        mDisplayWidth = w;
2407        mDisplayHeight = h;
2408    }
2409
2410    setOrientation(ISurfaceComposer::eOrientationDefault);
2411}
2412
2413status_t GraphicPlane::orientationToTransfrom(
2414        int orientation, int w, int h, Transform* tr)
2415{
2416    uint32_t flags = 0;
2417    switch (orientation) {
2418    case ISurfaceComposer::eOrientationDefault:
2419        flags = Transform::ROT_0;
2420        break;
2421    case ISurfaceComposer::eOrientation90:
2422        flags = Transform::ROT_90;
2423        break;
2424    case ISurfaceComposer::eOrientation180:
2425        flags = Transform::ROT_180;
2426        break;
2427    case ISurfaceComposer::eOrientation270:
2428        flags = Transform::ROT_270;
2429        break;
2430    default:
2431        return BAD_VALUE;
2432    }
2433    tr->set(flags, w, h);
2434    return NO_ERROR;
2435}
2436
2437status_t GraphicPlane::setOrientation(int orientation)
2438{
2439    // If the rotation can be handled in hardware, this is where
2440    // the magic should happen.
2441
2442    const DisplayHardware& hw(displayHardware());
2443    const float w = mDisplayWidth;
2444    const float h = mDisplayHeight;
2445    mWidth = int(w);
2446    mHeight = int(h);
2447
2448    Transform orientationTransform;
2449    GraphicPlane::orientationToTransfrom(orientation, w, h,
2450            &orientationTransform);
2451    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2452        mWidth = int(h);
2453        mHeight = int(w);
2454    }
2455
2456    mOrientation = orientation;
2457    mGlobalTransform = mDisplayTransform * orientationTransform;
2458    return NO_ERROR;
2459}
2460
2461const DisplayHardware& GraphicPlane::displayHardware() const {
2462    return *mHw;
2463}
2464
2465DisplayHardware& GraphicPlane::editDisplayHardware() {
2466    return *mHw;
2467}
2468
2469const Transform& GraphicPlane::transform() const {
2470    return mGlobalTransform;
2471}
2472
2473EGLDisplay GraphicPlane::getEGLDisplay() const {
2474    return mHw->getEGLDisplay();
2475}
2476
2477// ---------------------------------------------------------------------------
2478
2479}; // namespace android
2480