SurfaceFlinger.cpp revision 8372785879d329f592f6883620b5a32d80d74691 
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#include "DisplayHardware/HWComposer.h"
57
58/* ideally AID_GRAPHICS would be in a semi-public header
59 * or there would be a way to map a user/group name to its id
60 */
61#ifndef AID_GRAPHICS
62#define AID_GRAPHICS 1003
63#endif
64
65#define DISPLAY_COUNT       1
66
67namespace android {
68// ---------------------------------------------------------------------------
69
70SurfaceFlinger::SurfaceFlinger()
71    :   BnSurfaceComposer(), Thread(false),
72        mTransactionFlags(0),
73        mTransactionCount(0),
74        mResizeTransationPending(false),
75        mLayersRemoved(false),
76        mBootTime(systemTime()),
77        mHardwareTest("android.permission.HARDWARE_TEST"),
78        mAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER"),
79        mDump("android.permission.DUMP"),
80        mVisibleRegionsDirty(false),
81        mHwWorkListDirty(false),
82        mDeferReleaseConsole(false),
83        mFreezeDisplay(false),
84        mFreezeCount(0),
85        mFreezeDisplayTime(0),
86        mDebugRegion(0),
87        mDebugBackground(0),
88        mDebugDisableHWC(0),
89        mDebugInSwapBuffers(0),
90        mLastSwapBufferTime(0),
91        mDebugInTransaction(0),
92        mLastTransactionTime(0),
93        mBootFinished(false),
94        mConsoleSignals(0),
95        mSecureFrameBuffer(0)
96{
97    init();
98}
99
100void SurfaceFlinger::init()
101{
102    LOGI("SurfaceFlinger is starting");
103
104    // debugging stuff...
105    char value[PROPERTY_VALUE_MAX];
106    property_get("debug.sf.showupdates", value, "0");
107    mDebugRegion = atoi(value);
108    property_get("debug.sf.showbackground", value, "0");
109    mDebugBackground = atoi(value);
110
111    LOGI_IF(mDebugRegion,       "showupdates enabled");
112    LOGI_IF(mDebugBackground,   "showbackground enabled");
113}
114
115SurfaceFlinger::~SurfaceFlinger()
116{
117    glDeleteTextures(1, &mWormholeTexName);
118}
119
120overlay_control_device_t* SurfaceFlinger::getOverlayEngine() const
121{
122    return graphicPlane(0).displayHardware().getOverlayEngine();
123}
124
125sp<IMemoryHeap> SurfaceFlinger::getCblk() const
126{
127    return mServerHeap;
128}
129
130sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
131{
132    sp<ISurfaceComposerClient> bclient;
133    sp<Client> client(new Client(this));
134    status_t err = client->initCheck();
135    if (err == NO_ERROR) {
136        bclient = client;
137    }
138    return bclient;
139}
140
141sp<ISurfaceComposerClient> SurfaceFlinger::createClientConnection()
142{
143    sp<ISurfaceComposerClient> bclient;
144    sp<UserClient> client(new UserClient(this));
145    status_t err = client->initCheck();
146    if (err == NO_ERROR) {
147        bclient = client;
148    }
149    return bclient;
150}
151
152
153const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
154{
155    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
156    const GraphicPlane& plane(mGraphicPlanes[dpy]);
157    return plane;
158}
159
160GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
161{
162    return const_cast<GraphicPlane&>(
163        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
164}
165
166void SurfaceFlinger::bootFinished()
167{
168    const nsecs_t now = systemTime();
169    const nsecs_t duration = now - mBootTime;
170    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
171    mBootFinished = true;
172    property_set("ctl.stop", "bootanim");
173}
174
175void SurfaceFlinger::onFirstRef()
176{
177    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
178
179    // Wait for the main thread to be done with its initialization
180    mReadyToRunBarrier.wait();
181}
182
183static inline uint16_t pack565(int r, int g, int b) {
184    return (r<<11)|(g<<5)|b;
185}
186
187status_t SurfaceFlinger::readyToRun()
188{
189    LOGI(   "SurfaceFlinger's main thread ready to run. "
190            "Initializing graphics H/W...");
191
192    // we only support one display currently
193    int dpy = 0;
194
195    {
196        // initialize the main display
197        GraphicPlane& plane(graphicPlane(dpy));
198        DisplayHardware* const hw = new DisplayHardware(this, dpy);
199        plane.setDisplayHardware(hw);
200    }
201
202    // create the shared control-block
203    mServerHeap = new MemoryHeapBase(4096,
204            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
205    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
206
207    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
208    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
209
210    new(mServerCblk) surface_flinger_cblk_t;
211
212    // initialize primary screen
213    // (other display should be initialized in the same manner, but
214    // asynchronously, as they could come and go. None of this is supported
215    // yet).
216    const GraphicPlane& plane(graphicPlane(dpy));
217    const DisplayHardware& hw = plane.displayHardware();
218    const uint32_t w = hw.getWidth();
219    const uint32_t h = hw.getHeight();
220    const uint32_t f = hw.getFormat();
221    hw.makeCurrent();
222
223    // initialize the shared control block
224    mServerCblk->connected |= 1<<dpy;
225    display_cblk_t* dcblk = mServerCblk->displays + dpy;
226    memset(dcblk, 0, sizeof(display_cblk_t));
227    dcblk->w            = plane.getWidth();
228    dcblk->h            = plane.getHeight();
229    dcblk->format       = f;
230    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
231    dcblk->xdpi         = hw.getDpiX();
232    dcblk->ydpi         = hw.getDpiY();
233    dcblk->fps          = hw.getRefreshRate();
234    dcblk->density      = hw.getDensity();
235
236    // Initialize OpenGL|ES
237    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
238    glPixelStorei(GL_PACK_ALIGNMENT, 4);
239    glEnableClientState(GL_VERTEX_ARRAY);
240    glEnable(GL_SCISSOR_TEST);
241    glShadeModel(GL_FLAT);
242    glDisable(GL_DITHER);
243    glDisable(GL_CULL_FACE);
244
245    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
246    const uint16_t g1 = pack565(0x17,0x2f,0x17);
247    const uint16_t textureData[4] = { g0, g1, g1, g0 };
248    glGenTextures(1, &mWormholeTexName);
249    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
250    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
251    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
252    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
253    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
254    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
255            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
256
257    glViewport(0, 0, w, h);
258    glMatrixMode(GL_PROJECTION);
259    glLoadIdentity();
260    glOrthof(0, w, h, 0, 0, 1);
261
262   LayerDim::initDimmer(this, w, h);
263
264    mReadyToRunBarrier.open();
265
266    /*
267     *  We're now ready to accept clients...
268     */
269
270    // start boot animation
271    property_set("ctl.start", "bootanim");
272
273    return NO_ERROR;
274}
275
276// ----------------------------------------------------------------------------
277#if 0
278#pragma mark -
279#pragma mark Events Handler
280#endif
281
282void SurfaceFlinger::waitForEvent()
283{
284    while (true) {
285        nsecs_t timeout = -1;
286        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
287        if (UNLIKELY(isFrozen())) {
288            // wait 5 seconds
289            const nsecs_t now = systemTime();
290            if (mFreezeDisplayTime == 0) {
291                mFreezeDisplayTime = now;
292            }
293            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
294            timeout = waitTime>0 ? waitTime : 0;
295        }
296
297        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
298
299        // see if we timed out
300        if (isFrozen()) {
301            const nsecs_t now = systemTime();
302            nsecs_t frozenTime = (now - mFreezeDisplayTime);
303            if (frozenTime >= freezeDisplayTimeout) {
304                // we timed out and are still frozen
305                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
306                        mFreezeDisplay, mFreezeCount);
307                mFreezeDisplayTime = 0;
308                mFreezeCount = 0;
309                mFreezeDisplay = false;
310            }
311        }
312
313        if (msg != 0) {
314            switch (msg->what) {
315                case MessageQueue::INVALIDATE:
316                    // invalidate message, just return to the main loop
317                    return;
318            }
319        }
320    }
321}
322
323void SurfaceFlinger::signalEvent() {
324    mEventQueue.invalidate();
325}
326
327void SurfaceFlinger::signal() const {
328    // this is the IPC call
329    const_cast<SurfaceFlinger*>(this)->signalEvent();
330}
331
332status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
333        nsecs_t reltime, uint32_t flags)
334{
335    return mEventQueue.postMessage(msg, reltime, flags);
336}
337
338status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
339        nsecs_t reltime, uint32_t flags)
340{
341    status_t res = mEventQueue.postMessage(msg, reltime, flags);
342    if (res == NO_ERROR) {
343        msg->wait();
344    }
345    return res;
346}
347
348// ----------------------------------------------------------------------------
349#if 0
350#pragma mark -
351#pragma mark Main loop
352#endif
353
354bool SurfaceFlinger::threadLoop()
355{
356    waitForEvent();
357
358    // check for transactions
359    if (UNLIKELY(mConsoleSignals)) {
360        handleConsoleEvents();
361    }
362
363    if (LIKELY(mTransactionCount == 0)) {
364        // if we're in a global transaction, don't do anything.
365        const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
366        uint32_t transactionFlags = getTransactionFlags(mask);
367        if (LIKELY(transactionFlags)) {
368            handleTransaction(transactionFlags);
369        }
370    }
371
372    // post surfaces (if needed)
373    handlePageFlip();
374
375    if (UNLIKELY(mHwWorkListDirty)) {
376        // build the h/w work list
377        handleWorkList();
378    }
379
380    const DisplayHardware& hw(graphicPlane(0).displayHardware());
381    if (LIKELY(hw.canDraw() && !isFrozen())) {
382        // repaint the framebuffer (if needed)
383
384        const int index = hw.getCurrentBufferIndex();
385        GraphicLog& logger(GraphicLog::getInstance());
386
387        logger.log(GraphicLog::SF_REPAINT, index);
388        handleRepaint();
389
390        // inform the h/w that we're done compositing
391        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
392        hw.compositionComplete();
393
394        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
395        postFramebuffer();
396
397        logger.log(GraphicLog::SF_UNLOCK_CLIENTS, index);
398        unlockClients();
399
400        logger.log(GraphicLog::SF_REPAINT_DONE, index);
401    } else {
402        // pretend we did the post
403        unlockClients();
404        usleep(16667); // 60 fps period
405    }
406    return true;
407}
408
409void SurfaceFlinger::postFramebuffer()
410{
411    if (!mInvalidRegion.isEmpty()) {
412        const DisplayHardware& hw(graphicPlane(0).displayHardware());
413        const nsecs_t now = systemTime();
414        mDebugInSwapBuffers = now;
415        hw.flip(mInvalidRegion);
416        mLastSwapBufferTime = systemTime() - now;
417        mDebugInSwapBuffers = 0;
418        mInvalidRegion.clear();
419    }
420}
421
422void SurfaceFlinger::handleConsoleEvents()
423{
424    // something to do with the console
425    const DisplayHardware& hw = graphicPlane(0).displayHardware();
426
427    int what = android_atomic_and(0, &mConsoleSignals);
428    if (what & eConsoleAcquired) {
429        hw.acquireScreen();
430    }
431
432    if (mDeferReleaseConsole && hw.canDraw()) {
433        // We got the release signal before the acquire signal
434        mDeferReleaseConsole = false;
435        hw.releaseScreen();
436    }
437
438    if (what & eConsoleReleased) {
439        if (hw.canDraw()) {
440            hw.releaseScreen();
441        } else {
442            mDeferReleaseConsole = true;
443        }
444    }
445
446    mDirtyRegion.set(hw.bounds());
447}
448
449void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
450{
451    Vector< sp<LayerBase> > ditchedLayers;
452
453    /*
454     * Perform and commit the transaction
455     */
456
457    { // scope for the lock
458        Mutex::Autolock _l(mStateLock);
459        const nsecs_t now = systemTime();
460        mDebugInTransaction = now;
461        handleTransactionLocked(transactionFlags, ditchedLayers);
462        mLastTransactionTime = systemTime() - now;
463        mDebugInTransaction = 0;
464        mHwWorkListDirty = true;
465        // here the transaction has been committed
466    }
467
468    /*
469     * Clean-up all layers that went away
470     * (do this without the lock held)
471     */
472
473    const size_t count = ditchedLayers.size();
474    for (size_t i=0 ; i<count ; i++) {
475        if (ditchedLayers[i] != 0) {
476            //LOGD("ditching layer %p", ditchedLayers[i].get());
477            ditchedLayers[i]->ditch();
478        }
479    }
480}
481
482void SurfaceFlinger::handleTransactionLocked(
483        uint32_t transactionFlags, Vector< sp<LayerBase> >& ditchedLayers)
484{
485    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
486    const size_t count = currentLayers.size();
487
488    /*
489     * Traversal of the children
490     * (perform the transaction for each of them if needed)
491     */
492
493    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
494    if (layersNeedTransaction) {
495        for (size_t i=0 ; i<count ; i++) {
496            const sp<LayerBase>& layer = currentLayers[i];
497            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
498            if (!trFlags) continue;
499
500            const uint32_t flags = layer->doTransaction(0);
501            if (flags & Layer::eVisibleRegion)
502                mVisibleRegionsDirty = true;
503        }
504    }
505
506    /*
507     * Perform our own transaction if needed
508     */
509
510    if (transactionFlags & eTransactionNeeded) {
511        if (mCurrentState.orientation != mDrawingState.orientation) {
512            // the orientation has changed, recompute all visible regions
513            // and invalidate everything.
514
515            const int dpy = 0;
516            const int orientation = mCurrentState.orientation;
517            const uint32_t type = mCurrentState.orientationType;
518            GraphicPlane& plane(graphicPlane(dpy));
519            plane.setOrientation(orientation);
520
521            // update the shared control block
522            const DisplayHardware& hw(plane.displayHardware());
523            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
524            dcblk->orientation = orientation;
525            dcblk->w = plane.getWidth();
526            dcblk->h = plane.getHeight();
527
528            mVisibleRegionsDirty = true;
529            mDirtyRegion.set(hw.bounds());
530        }
531
532        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
533            // freezing or unfreezing the display -> trigger animation if needed
534            mFreezeDisplay = mCurrentState.freezeDisplay;
535            if (mFreezeDisplay)
536                 mFreezeDisplayTime = 0;
537        }
538
539        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
540            // layers have been added
541            mVisibleRegionsDirty = true;
542        }
543
544        // some layers might have been removed, so
545        // we need to update the regions they're exposing.
546        if (mLayersRemoved) {
547            mLayersRemoved = false;
548            mVisibleRegionsDirty = true;
549            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
550            const size_t count = previousLayers.size();
551            for (size_t i=0 ; i<count ; i++) {
552                const sp<LayerBase>& layer(previousLayers[i]);
553                if (currentLayers.indexOf( layer ) < 0) {
554                    // this layer is not visible anymore
555                    ditchedLayers.add(layer);
556                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
557                }
558            }
559        }
560    }
561
562    commitTransaction();
563}
564
565sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
566{
567    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
568}
569
570void SurfaceFlinger::computeVisibleRegions(
571    LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
572{
573    const GraphicPlane& plane(graphicPlane(0));
574    const Transform& planeTransform(plane.transform());
575    const DisplayHardware& hw(plane.displayHardware());
576    const Region screenRegion(hw.bounds());
577
578    Region aboveOpaqueLayers;
579    Region aboveCoveredLayers;
580    Region dirty;
581
582    bool secureFrameBuffer = false;
583
584    size_t i = currentLayers.size();
585    while (i--) {
586        const sp<LayerBase>& layer = currentLayers[i];
587        layer->validateVisibility(planeTransform);
588
589        // start with the whole surface at its current location
590        const Layer::State& s(layer->drawingState());
591
592        /*
593         * opaqueRegion: area of a surface that is fully opaque.
594         */
595        Region opaqueRegion;
596
597        /*
598         * visibleRegion: area of a surface that is visible on screen
599         * and not fully transparent. This is essentially the layer's
600         * footprint minus the opaque regions above it.
601         * Areas covered by a translucent surface are considered visible.
602         */
603        Region visibleRegion;
604
605        /*
606         * coveredRegion: area of a surface that is covered by all
607         * visible regions above it (which includes the translucent areas).
608         */
609        Region coveredRegion;
610
611
612        // handle hidden surfaces by setting the visible region to empty
613        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
614            const bool translucent = layer->needsBlending();
615            const Rect bounds(layer->visibleBounds());
616            visibleRegion.set(bounds);
617            visibleRegion.andSelf(screenRegion);
618            if (!visibleRegion.isEmpty()) {
619                // Remove the transparent area from the visible region
620                if (translucent) {
621                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
622                }
623
624                // compute the opaque region
625                const int32_t layerOrientation = layer->getOrientation();
626                if (s.alpha==255 && !translucent &&
627                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
628                    // the opaque region is the layer's footprint
629                    opaqueRegion = visibleRegion;
630                }
631            }
632        }
633
634        // Clip the covered region to the visible region
635        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
636
637        // Update aboveCoveredLayers for next (lower) layer
638        aboveCoveredLayers.orSelf(visibleRegion);
639
640        // subtract the opaque region covered by the layers above us
641        visibleRegion.subtractSelf(aboveOpaqueLayers);
642
643        // compute this layer's dirty region
644        if (layer->contentDirty) {
645            // we need to invalidate the whole region
646            dirty = visibleRegion;
647            // as well, as the old visible region
648            dirty.orSelf(layer->visibleRegionScreen);
649            layer->contentDirty = false;
650        } else {
651            /* compute the exposed region:
652             *   the exposed region consists of two components:
653             *   1) what's VISIBLE now and was COVERED before
654             *   2) what's EXPOSED now less what was EXPOSED before
655             *
656             * note that (1) is conservative, we start with the whole
657             * visible region but only keep what used to be covered by
658             * something -- which mean it may have been exposed.
659             *
660             * (2) handles areas that were not covered by anything but got
661             * exposed because of a resize.
662             */
663            const Region newExposed = visibleRegion - coveredRegion;
664            const Region oldVisibleRegion = layer->visibleRegionScreen;
665            const Region oldCoveredRegion = layer->coveredRegionScreen;
666            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
667            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
668        }
669        dirty.subtractSelf(aboveOpaqueLayers);
670
671        // accumulate to the screen dirty region
672        dirtyRegion.orSelf(dirty);
673
674        // Update aboveOpaqueLayers for next (lower) layer
675        aboveOpaqueLayers.orSelf(opaqueRegion);
676
677        // Store the visible region is screen space
678        layer->setVisibleRegion(visibleRegion);
679        layer->setCoveredRegion(coveredRegion);
680
681        // If a secure layer is partially visible, lock-down the screen!
682        if (layer->isSecure() && !visibleRegion.isEmpty()) {
683            secureFrameBuffer = true;
684        }
685    }
686
687    // invalidate the areas where a layer was removed
688    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
689    mDirtyRegionRemovedLayer.clear();
690
691    mSecureFrameBuffer = secureFrameBuffer;
692    opaqueRegion = aboveOpaqueLayers;
693}
694
695
696void SurfaceFlinger::commitTransaction()
697{
698    mDrawingState = mCurrentState;
699    mResizeTransationPending = false;
700    mTransactionCV.broadcast();
701}
702
703void SurfaceFlinger::handlePageFlip()
704{
705    bool visibleRegions = mVisibleRegionsDirty;
706    LayerVector& currentLayers(
707            const_cast<LayerVector&>(mDrawingState.layersSortedByZ));
708    visibleRegions |= lockPageFlip(currentLayers);
709
710        const DisplayHardware& hw = graphicPlane(0).displayHardware();
711        const Region screenRegion(hw.bounds());
712        if (visibleRegions) {
713            Region opaqueRegion;
714            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
715
716            /*
717             *  rebuild the visible layer list
718             */
719            mVisibleLayersSortedByZ.clear();
720            const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
721            size_t count = currentLayers.size();
722            mVisibleLayersSortedByZ.setCapacity(count);
723            for (size_t i=0 ; i<count ; i++) {
724                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
725                    mVisibleLayersSortedByZ.add(currentLayers[i]);
726            }
727
728            mWormholeRegion = screenRegion.subtract(opaqueRegion);
729            mVisibleRegionsDirty = false;
730            mHwWorkListDirty = true;
731        }
732
733    unlockPageFlip(currentLayers);
734    mDirtyRegion.andSelf(screenRegion);
735}
736
737bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
738{
739    bool recomputeVisibleRegions = false;
740    size_t count = currentLayers.size();
741    sp<LayerBase> const* layers = currentLayers.array();
742    for (size_t i=0 ; i<count ; i++) {
743        const sp<LayerBase>& layer(layers[i]);
744        layer->lockPageFlip(recomputeVisibleRegions);
745    }
746    return recomputeVisibleRegions;
747}
748
749void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
750{
751    const GraphicPlane& plane(graphicPlane(0));
752    const Transform& planeTransform(plane.transform());
753    size_t count = currentLayers.size();
754    sp<LayerBase> const* layers = currentLayers.array();
755    for (size_t i=0 ; i<count ; i++) {
756        const sp<LayerBase>& layer(layers[i]);
757        layer->unlockPageFlip(planeTransform, mDirtyRegion);
758    }
759}
760
761void SurfaceFlinger::handleWorkList()
762{
763    mHwWorkListDirty = false;
764    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
765    if (hwc.initCheck() == NO_ERROR) {
766        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
767        const size_t count = currentLayers.size();
768        hwc.createWorkList(count);
769        hwc_layer_t* const cur(hwc.getLayers());
770        for (size_t i=0 ; cur && i<count ; i++) {
771            currentLayers[i]->setGeometry(&cur[i]);
772            if (mDebugDisableHWC) {
773                cur[i].compositionType = HWC_FRAMEBUFFER;
774                cur[i].flags |= HWC_SKIP_LAYER;
775            }
776        }
777    }
778}
779
780void SurfaceFlinger::handleRepaint()
781{
782    // compute the invalid region
783    mInvalidRegion.orSelf(mDirtyRegion);
784    if (mInvalidRegion.isEmpty()) {
785        // nothing to do
786        return;
787    }
788
789    if (UNLIKELY(mDebugRegion)) {
790        debugFlashRegions();
791    }
792
793    // set the frame buffer
794    const DisplayHardware& hw(graphicPlane(0).displayHardware());
795    glMatrixMode(GL_MODELVIEW);
796    glLoadIdentity();
797
798    uint32_t flags = hw.getFlags();
799    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
800        (flags & DisplayHardware::BUFFER_PRESERVED))
801    {
802        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
803        // takes a rectangle, we must make sure to update that whole
804        // rectangle in that case
805        if (flags & DisplayHardware::SWAP_RECTANGLE) {
806            // TODO: we really should be able to pass a region to
807            // SWAP_RECTANGLE so that we don't have to redraw all this.
808            mDirtyRegion.set(mInvalidRegion.bounds());
809        } else {
810            // in the BUFFER_PRESERVED case, obviously, we can update only
811            // what's needed and nothing more.
812            // NOTE: this is NOT a common case, as preserving the backbuffer
813            // is costly and usually involves copying the whole update back.
814        }
815    } else {
816        if (flags & DisplayHardware::PARTIAL_UPDATES) {
817            // We need to redraw the rectangle that will be updated
818            // (pushed to the framebuffer).
819            // This is needed because PARTIAL_UPDATES only takes one
820            // rectangle instead of a region (see DisplayHardware::flip())
821            mDirtyRegion.set(mInvalidRegion.bounds());
822        } else {
823            // we need to redraw everything (the whole screen)
824            mDirtyRegion.set(hw.bounds());
825            mInvalidRegion = mDirtyRegion;
826        }
827    }
828
829    // compose all surfaces
830    composeSurfaces(mDirtyRegion);
831
832    // clear the dirty regions
833    mDirtyRegion.clear();
834}
835
836void SurfaceFlinger::composeSurfaces(const Region& dirty)
837{
838    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
839        // should never happen unless the window manager has a bug
840        // draw something...
841        drawWormhole();
842    }
843
844    status_t err = NO_ERROR;
845    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
846    size_t count = layers.size();
847
848    const DisplayHardware& hw(graphicPlane(0).displayHardware());
849    HWComposer& hwc(hw.getHwComposer());
850    hwc_layer_t* const cur(hwc.getLayers());
851
852    LOGE_IF(cur && hwc.getNumLayers() != count,
853            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
854            hwc.getNumLayers(), count);
855
856    // just to be extra-safe, use the smallest count
857    if (hwc.initCheck() == NO_ERROR) {
858        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
859    }
860
861    /*
862     *  update the per-frame h/w composer data for each layer
863     *  and build the transparent region of the FB
864     */
865    Region transparent;
866    if (cur) {
867        for (size_t i=0 ; i<count ; i++) {
868            const sp<LayerBase>& layer(layers[i]);
869            layer->setPerFrameData(&cur[i]);
870            if (cur[i].hints & HWC_HINT_CLEAR_FB) {
871                if (!(layer->needsBlending())) {
872                    transparent.orSelf(layer->visibleRegionScreen);
873                }
874            }
875        }
876        err = hwc.prepare();
877        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
878    }
879
880    /*
881     *  clear the area of the FB that need to be transparent
882     */
883    transparent.andSelf(dirty);
884    if (!transparent.isEmpty()) {
885        glClearColor(0,0,0,0);
886        Region::const_iterator it = transparent.begin();
887        Region::const_iterator const end = transparent.end();
888        const int32_t height = hw.getHeight();
889        while (it != end) {
890            const Rect& r(*it++);
891            const GLint sy = height - (r.top + r.height());
892            glScissor(r.left, sy, r.width(), r.height());
893            glClear(GL_COLOR_BUFFER_BIT);
894        }
895    }
896
897
898    /*
899     * and then, render the layers targeted at the framebuffer
900     */
901    for (size_t i=0 ; i<count ; i++) {
902        if (cur) {
903            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
904                !(cur[i].flags & HWC_SKIP_LAYER)) {
905                // skip layers handled by the HAL
906                continue;
907            }
908        }
909
910        const sp<LayerBase>& layer(layers[i]);
911        const Region clip(dirty.intersect(layer->visibleRegionScreen));
912        if (!clip.isEmpty()) {
913            layer->draw(clip);
914        }
915    }
916}
917
918void SurfaceFlinger::unlockClients()
919{
920    const LayerVector& drawingLayers(mDrawingState.layersSortedByZ);
921    const size_t count = drawingLayers.size();
922    sp<LayerBase> const* const layers = drawingLayers.array();
923    for (size_t i=0 ; i<count ; ++i) {
924        const sp<LayerBase>& layer = layers[i];
925        layer->finishPageFlip();
926    }
927}
928
929void SurfaceFlinger::debugFlashRegions()
930{
931    const DisplayHardware& hw(graphicPlane(0).displayHardware());
932    const uint32_t flags = hw.getFlags();
933
934    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
935            (flags & DisplayHardware::BUFFER_PRESERVED))) {
936        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
937                mDirtyRegion.bounds() : hw.bounds());
938        composeSurfaces(repaint);
939    }
940
941    TextureManager::deactivateTextures();
942
943    glDisable(GL_BLEND);
944    glDisable(GL_DITHER);
945    glDisable(GL_SCISSOR_TEST);
946
947    static int toggle = 0;
948    toggle = 1 - toggle;
949    if (toggle) {
950        glColor4f(1, 0, 1, 1);
951    } else {
952        glColor4f(1, 1, 0, 1);
953    }
954
955    Region::const_iterator it = mDirtyRegion.begin();
956    Region::const_iterator const end = mDirtyRegion.end();
957    while (it != end) {
958        const Rect& r = *it++;
959        GLfloat vertices[][2] = {
960                { r.left,  r.top },
961                { r.left,  r.bottom },
962                { r.right, r.bottom },
963                { r.right, r.top }
964        };
965        glVertexPointer(2, GL_FLOAT, 0, vertices);
966        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
967    }
968
969    if (mInvalidRegion.isEmpty()) {
970        mDirtyRegion.dump("mDirtyRegion");
971        mInvalidRegion.dump("mInvalidRegion");
972    }
973    hw.flip(mInvalidRegion);
974
975    if (mDebugRegion > 1)
976        usleep(mDebugRegion * 1000);
977
978    glEnable(GL_SCISSOR_TEST);
979    //mDirtyRegion.dump("mDirtyRegion");
980}
981
982void SurfaceFlinger::drawWormhole() const
983{
984    const Region region(mWormholeRegion.intersect(mDirtyRegion));
985    if (region.isEmpty())
986        return;
987
988    const DisplayHardware& hw(graphicPlane(0).displayHardware());
989    const int32_t width = hw.getWidth();
990    const int32_t height = hw.getHeight();
991
992    glDisable(GL_BLEND);
993    glDisable(GL_DITHER);
994
995    if (LIKELY(!mDebugBackground)) {
996        glClearColor(0,0,0,0);
997        Region::const_iterator it = region.begin();
998        Region::const_iterator const end = region.end();
999        while (it != end) {
1000            const Rect& r = *it++;
1001            const GLint sy = height - (r.top + r.height());
1002            glScissor(r.left, sy, r.width(), r.height());
1003            glClear(GL_COLOR_BUFFER_BIT);
1004        }
1005    } else {
1006        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1007                { width, height }, { 0, height }  };
1008        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1009        glVertexPointer(2, GL_SHORT, 0, vertices);
1010        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1011        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1012#if defined(GL_OES_EGL_image_external)
1013        if (GLExtensions::getInstance().haveTextureExternal()) {
1014            glDisable(GL_TEXTURE_EXTERNAL_OES);
1015        }
1016#endif
1017        glEnable(GL_TEXTURE_2D);
1018        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1019        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1020        glMatrixMode(GL_TEXTURE);
1021        glLoadIdentity();
1022        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1023        Region::const_iterator it = region.begin();
1024        Region::const_iterator const end = region.end();
1025        while (it != end) {
1026            const Rect& r = *it++;
1027            const GLint sy = height - (r.top + r.height());
1028            glScissor(r.left, sy, r.width(), r.height());
1029            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1030        }
1031        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1032    }
1033}
1034
1035void SurfaceFlinger::debugShowFPS() const
1036{
1037    static int mFrameCount;
1038    static int mLastFrameCount = 0;
1039    static nsecs_t mLastFpsTime = 0;
1040    static float mFps = 0;
1041    mFrameCount++;
1042    nsecs_t now = systemTime();
1043    nsecs_t diff = now - mLastFpsTime;
1044    if (diff > ms2ns(250)) {
1045        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1046        mLastFpsTime = now;
1047        mLastFrameCount = mFrameCount;
1048    }
1049    // XXX: mFPS has the value we want
1050 }
1051
1052status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1053{
1054    Mutex::Autolock _l(mStateLock);
1055    addLayer_l(layer);
1056    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1057    return NO_ERROR;
1058}
1059
1060status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1061{
1062    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1063    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1064}
1065
1066ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1067        const sp<LayerBaseClient>& lbc)
1068{
1069    Mutex::Autolock _l(mStateLock);
1070
1071    // attach this layer to the client
1072    ssize_t name = client->attachLayer(lbc);
1073
1074    // add this layer to the current state list
1075    addLayer_l(lbc);
1076
1077    return name;
1078}
1079
1080status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1081{
1082    Mutex::Autolock _l(mStateLock);
1083    status_t err = purgatorizeLayer_l(layer);
1084    if (err == NO_ERROR)
1085        setTransactionFlags(eTransactionNeeded);
1086    return err;
1087}
1088
1089status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1090{
1091    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1092    if (lbc != 0) {
1093        mLayerMap.removeItem( lbc->getSurface()->asBinder() );
1094    }
1095    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1096    if (index >= 0) {
1097        mLayersRemoved = true;
1098        return NO_ERROR;
1099    }
1100    return status_t(index);
1101}
1102
1103status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1104{
1105    // remove the layer from the main list (through a transaction).
1106    ssize_t err = removeLayer_l(layerBase);
1107
1108    layerBase->onRemoved();
1109
1110    // it's possible that we don't find a layer, because it might
1111    // have been destroyed already -- this is not technically an error
1112    // from the user because there is a race between Client::destroySurface(),
1113    // ~Client() and ~ISurface().
1114    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1115}
1116
1117status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1118{
1119    layer->forceVisibilityTransaction();
1120    setTransactionFlags(eTraversalNeeded);
1121    return NO_ERROR;
1122}
1123
1124uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1125{
1126    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1127}
1128
1129uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1130{
1131    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1132    if ((old & flags)==0) { // wake the server up
1133        signalEvent();
1134    }
1135    return old;
1136}
1137
1138void SurfaceFlinger::openGlobalTransaction()
1139{
1140    android_atomic_inc(&mTransactionCount);
1141}
1142
1143void SurfaceFlinger::closeGlobalTransaction()
1144{
1145    if (android_atomic_dec(&mTransactionCount) == 1) {
1146        signalEvent();
1147
1148        // if there is a transaction with a resize, wait for it to
1149        // take effect before returning.
1150        Mutex::Autolock _l(mStateLock);
1151        while (mResizeTransationPending) {
1152            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1153            if (CC_UNLIKELY(err != NO_ERROR)) {
1154                // just in case something goes wrong in SF, return to the
1155                // called after a few seconds.
1156                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1157                mResizeTransationPending = false;
1158                break;
1159            }
1160        }
1161    }
1162}
1163
1164status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1165{
1166    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1167        return BAD_VALUE;
1168
1169    Mutex::Autolock _l(mStateLock);
1170    mCurrentState.freezeDisplay = 1;
1171    setTransactionFlags(eTransactionNeeded);
1172
1173    // flags is intended to communicate some sort of animation behavior
1174    // (for instance fading)
1175    return NO_ERROR;
1176}
1177
1178status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1179{
1180    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1181        return BAD_VALUE;
1182
1183    Mutex::Autolock _l(mStateLock);
1184    mCurrentState.freezeDisplay = 0;
1185    setTransactionFlags(eTransactionNeeded);
1186
1187    // flags is intended to communicate some sort of animation behavior
1188    // (for instance fading)
1189    return NO_ERROR;
1190}
1191
1192int SurfaceFlinger::setOrientation(DisplayID dpy,
1193        int orientation, uint32_t flags)
1194{
1195    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1196        return BAD_VALUE;
1197
1198    Mutex::Autolock _l(mStateLock);
1199    if (mCurrentState.orientation != orientation) {
1200        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1201            mCurrentState.orientationType = flags;
1202            mCurrentState.orientation = orientation;
1203            setTransactionFlags(eTransactionNeeded);
1204            mTransactionCV.wait(mStateLock);
1205        } else {
1206            orientation = BAD_VALUE;
1207        }
1208    }
1209    return orientation;
1210}
1211
1212sp<ISurface> SurfaceFlinger::createSurface(const sp<Client>& client, int pid,
1213        const String8& name, ISurfaceComposerClient::surface_data_t* params,
1214        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1215        uint32_t flags)
1216{
1217    sp<LayerBaseClient> layer;
1218    sp<LayerBaseClient::Surface> surfaceHandle;
1219
1220    if (int32_t(w|h) < 0) {
1221        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1222                int(w), int(h));
1223        return surfaceHandle;
1224    }
1225
1226    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1227    sp<Layer> normalLayer;
1228    switch (flags & eFXSurfaceMask) {
1229        case eFXSurfaceNormal:
1230#if HAS_PUSH_BUFFERS
1231            if (UNLIKELY(flags & ePushBuffers)) {
1232                layer = createPushBuffersSurface(client, d, w, h, flags);
1233            } else
1234#endif
1235            {
1236                normalLayer = createNormalSurface(client, d, w, h, flags, format);
1237                layer = normalLayer;
1238            }
1239            break;
1240        case eFXSurfaceBlur:
1241            layer = createBlurSurface(client, d, w, h, flags);
1242            break;
1243        case eFXSurfaceDim:
1244            layer = createDimSurface(client, d, w, h, flags);
1245            break;
1246    }
1247
1248    if (layer != 0) {
1249        layer->initStates(w, h, flags);
1250        layer->setName(name);
1251        ssize_t token = addClientLayer(client, layer);
1252
1253        surfaceHandle = layer->getSurface();
1254        if (surfaceHandle != 0) {
1255            params->token = token;
1256            params->identity = surfaceHandle->getIdentity();
1257            params->width = w;
1258            params->height = h;
1259            params->format = format;
1260            if (normalLayer != 0) {
1261                Mutex::Autolock _l(mStateLock);
1262                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1263            }
1264        }
1265
1266        setTransactionFlags(eTransactionNeeded);
1267    }
1268
1269    return surfaceHandle;
1270}
1271
1272sp<Layer> SurfaceFlinger::createNormalSurface(
1273        const sp<Client>& client, DisplayID display,
1274        uint32_t w, uint32_t h, uint32_t flags,
1275        PixelFormat& format)
1276{
1277    // initialize the surfaces
1278    switch (format) { // TODO: take h/w into account
1279    case PIXEL_FORMAT_TRANSPARENT:
1280    case PIXEL_FORMAT_TRANSLUCENT:
1281        format = PIXEL_FORMAT_RGBA_8888;
1282        break;
1283    case PIXEL_FORMAT_OPAQUE:
1284#ifdef NO_RGBX_8888
1285        format = PIXEL_FORMAT_RGB_565;
1286#else
1287        format = PIXEL_FORMAT_RGBX_8888;
1288#endif
1289        break;
1290    }
1291
1292#ifdef NO_RGBX_8888
1293    if (format == PIXEL_FORMAT_RGBX_8888)
1294        format = PIXEL_FORMAT_RGBA_8888;
1295#endif
1296
1297    sp<Layer> layer = new Layer(this, display, client);
1298    status_t err = layer->setBuffers(w, h, format, flags);
1299    if (LIKELY(err != NO_ERROR)) {
1300        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1301        layer.clear();
1302    }
1303    return layer;
1304}
1305
1306sp<LayerBlur> SurfaceFlinger::createBlurSurface(
1307        const sp<Client>& client, DisplayID display,
1308        uint32_t w, uint32_t h, uint32_t flags)
1309{
1310    sp<LayerBlur> layer = new LayerBlur(this, display, client);
1311    layer->initStates(w, h, flags);
1312    return layer;
1313}
1314
1315sp<LayerDim> SurfaceFlinger::createDimSurface(
1316        const sp<Client>& client, DisplayID display,
1317        uint32_t w, uint32_t h, uint32_t flags)
1318{
1319    sp<LayerDim> layer = new LayerDim(this, display, client);
1320    layer->initStates(w, h, flags);
1321    return layer;
1322}
1323
1324sp<LayerBuffer> SurfaceFlinger::createPushBuffersSurface(
1325        const sp<Client>& client, DisplayID display,
1326        uint32_t w, uint32_t h, uint32_t flags)
1327{
1328    sp<LayerBuffer> layer = new LayerBuffer(this, display, client);
1329    layer->initStates(w, h, flags);
1330    return layer;
1331}
1332
1333status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1334{
1335    /*
1336     * called by the window manager, when a surface should be marked for
1337     * destruction.
1338     *
1339     * The surface is removed from the current and drawing lists, but placed
1340     * in the purgatory queue, so it's not destroyed right-away (we need
1341     * to wait for all client's references to go away first).
1342     */
1343
1344    status_t err = NAME_NOT_FOUND;
1345    Mutex::Autolock _l(mStateLock);
1346    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1347    if (layer != 0) {
1348        err = purgatorizeLayer_l(layer);
1349        if (err == NO_ERROR) {
1350            setTransactionFlags(eTransactionNeeded);
1351        }
1352    }
1353    return err;
1354}
1355
1356status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1357{
1358    // called by ~ISurface() when all references are gone
1359
1360    class MessageDestroySurface : public MessageBase {
1361        SurfaceFlinger* flinger;
1362        sp<LayerBaseClient> layer;
1363    public:
1364        MessageDestroySurface(
1365                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1366            : flinger(flinger), layer(layer) { }
1367        virtual bool handler() {
1368            sp<LayerBaseClient> l(layer);
1369            layer.clear(); // clear it outside of the lock;
1370            Mutex::Autolock _l(flinger->mStateLock);
1371            /*
1372             * remove the layer from the current list -- chances are that it's
1373             * not in the list anyway, because it should have been removed
1374             * already upon request of the client (eg: window manager).
1375             * However, a buggy client could have not done that.
1376             * Since we know we don't have any more clients, we don't need
1377             * to use the purgatory.
1378             */
1379            status_t err = flinger->removeLayer_l(l);
1380            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1381                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1382            return true;
1383        }
1384    };
1385
1386    postMessageAsync( new MessageDestroySurface(this, layer) );
1387    return NO_ERROR;
1388}
1389
1390status_t SurfaceFlinger::setClientState(
1391        const sp<Client>& client,
1392        int32_t count,
1393        const layer_state_t* states)
1394{
1395    Mutex::Autolock _l(mStateLock);
1396    uint32_t flags = 0;
1397    for (int i=0 ; i<count ; i++) {
1398        const layer_state_t& s(states[i]);
1399        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1400        if (layer != 0) {
1401            const uint32_t what = s.what;
1402            if (what & ePositionChanged) {
1403                if (layer->setPosition(s.x, s.y))
1404                    flags |= eTraversalNeeded;
1405            }
1406            if (what & eLayerChanged) {
1407                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1408                if (layer->setLayer(s.z)) {
1409                    mCurrentState.layersSortedByZ.removeAt(idx);
1410                    mCurrentState.layersSortedByZ.add(layer);
1411                    // we need traversal (state changed)
1412                    // AND transaction (list changed)
1413                    flags |= eTransactionNeeded|eTraversalNeeded;
1414                }
1415            }
1416            if (what & eSizeChanged) {
1417                if (layer->setSize(s.w, s.h)) {
1418                    flags |= eTraversalNeeded;
1419                    mResizeTransationPending = true;
1420                }
1421            }
1422            if (what & eAlphaChanged) {
1423                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1424                    flags |= eTraversalNeeded;
1425            }
1426            if (what & eMatrixChanged) {
1427                if (layer->setMatrix(s.matrix))
1428                    flags |= eTraversalNeeded;
1429            }
1430            if (what & eTransparentRegionChanged) {
1431                if (layer->setTransparentRegionHint(s.transparentRegion))
1432                    flags |= eTraversalNeeded;
1433            }
1434            if (what & eVisibilityChanged) {
1435                if (layer->setFlags(s.flags, s.mask))
1436                    flags |= eTraversalNeeded;
1437            }
1438        }
1439    }
1440    if (flags) {
1441        setTransactionFlags(flags);
1442    }
1443    return NO_ERROR;
1444}
1445
1446void SurfaceFlinger::screenReleased(int dpy)
1447{
1448    // this may be called by a signal handler, we can't do too much in here
1449    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1450    signalEvent();
1451}
1452
1453void SurfaceFlinger::screenAcquired(int dpy)
1454{
1455    // this may be called by a signal handler, we can't do too much in here
1456    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1457    signalEvent();
1458}
1459
1460status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1461{
1462    const size_t SIZE = 1024;
1463    char buffer[SIZE];
1464    String8 result;
1465    if (!mDump.checkCalling()) {
1466        snprintf(buffer, SIZE, "Permission Denial: "
1467                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1468                IPCThreadState::self()->getCallingPid(),
1469                IPCThreadState::self()->getCallingUid());
1470        result.append(buffer);
1471    } else {
1472
1473        // figure out if we're stuck somewhere
1474        const nsecs_t now = systemTime();
1475        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1476        const nsecs_t inTransaction(mDebugInTransaction);
1477        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1478        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1479
1480        // Try to get the main lock, but don't insist if we can't
1481        // (this would indicate SF is stuck, but we want to be able to
1482        // print something in dumpsys).
1483        int retry = 3;
1484        while (mStateLock.tryLock()<0 && --retry>=0) {
1485            usleep(1000000);
1486        }
1487        const bool locked(retry >= 0);
1488        if (!locked) {
1489            snprintf(buffer, SIZE,
1490                    "SurfaceFlinger appears to be unresponsive, "
1491                    "dumping anyways (no locks held)\n");
1492            result.append(buffer);
1493        }
1494
1495        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1496        const size_t count = currentLayers.size();
1497        for (size_t i=0 ; i<count ; i++) {
1498            const sp<LayerBase>& layer(currentLayers[i]);
1499            layer->dump(result, buffer, SIZE);
1500            const Layer::State& s(layer->drawingState());
1501            s.transparentRegion.dump(result, "transparentRegion");
1502            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1503            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1504        }
1505
1506        mWormholeRegion.dump(result, "WormholeRegion");
1507        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1508        snprintf(buffer, SIZE,
1509                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1510                mFreezeDisplay?"yes":"no", mFreezeCount,
1511                mCurrentState.orientation, hw.canDraw());
1512        result.append(buffer);
1513        snprintf(buffer, SIZE,
1514                "  last eglSwapBuffers() time: %f us\n"
1515                "  last transaction time     : %f us\n",
1516                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1517        result.append(buffer);
1518
1519        if (inSwapBuffersDuration || !locked) {
1520            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1521                    inSwapBuffersDuration/1000.0);
1522            result.append(buffer);
1523        }
1524
1525        if (inTransactionDuration || !locked) {
1526            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1527                    inTransactionDuration/1000.0);
1528            result.append(buffer);
1529        }
1530
1531        HWComposer& hwc(hw.getHwComposer());
1532        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1533                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1534                mDebugDisableHWC ? "disabled" : "enabled");
1535        result.append(buffer);
1536        hwc.dump(result, buffer, SIZE);
1537
1538        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1539        alloc.dump(result);
1540
1541        if (locked) {
1542            mStateLock.unlock();
1543        }
1544    }
1545    write(fd, result.string(), result.size());
1546    return NO_ERROR;
1547}
1548
1549status_t SurfaceFlinger::onTransact(
1550    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1551{
1552    switch (code) {
1553        case CREATE_CONNECTION:
1554        case OPEN_GLOBAL_TRANSACTION:
1555        case CLOSE_GLOBAL_TRANSACTION:
1556        case SET_ORIENTATION:
1557        case FREEZE_DISPLAY:
1558        case UNFREEZE_DISPLAY:
1559        case BOOT_FINISHED:
1560        {
1561            // codes that require permission check
1562            IPCThreadState* ipc = IPCThreadState::self();
1563            const int pid = ipc->getCallingPid();
1564            const int uid = ipc->getCallingUid();
1565            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1566                LOGE("Permission Denial: "
1567                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1568                return PERMISSION_DENIED;
1569            }
1570        }
1571    }
1572    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1573    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1574        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1575        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1576            IPCThreadState* ipc = IPCThreadState::self();
1577            const int pid = ipc->getCallingPid();
1578            const int uid = ipc->getCallingUid();
1579            LOGE("Permission Denial: "
1580                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1581            return PERMISSION_DENIED;
1582        }
1583        int n;
1584        switch (code) {
1585            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1586            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1587                return NO_ERROR;
1588            case 1002:  // SHOW_UPDATES
1589                n = data.readInt32();
1590                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1591                return NO_ERROR;
1592            case 1003:  // SHOW_BACKGROUND
1593                n = data.readInt32();
1594                mDebugBackground = n ? 1 : 0;
1595                return NO_ERROR;
1596            case 1008:  // toggle use of hw composer
1597                n = data.readInt32();
1598                mDebugDisableHWC = n ? 1 : 0;
1599                mHwWorkListDirty = true;
1600                // fall-through...
1601            case 1004:{ // repaint everything
1602                Mutex::Autolock _l(mStateLock);
1603                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1604                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1605                signalEvent();
1606                return NO_ERROR;
1607            }
1608            case 1005:{ // force transaction
1609                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1610                return NO_ERROR;
1611            }
1612            case 1006:{ // enable/disable GraphicLog
1613                int enabled = data.readInt32();
1614                GraphicLog::getInstance().setEnabled(enabled);
1615                return NO_ERROR;
1616            }
1617            case 1007: // set mFreezeCount
1618                mFreezeCount = data.readInt32();
1619                mFreezeDisplayTime = 0;
1620                return NO_ERROR;
1621            case 1010:  // interrogate.
1622                reply->writeInt32(0);
1623                reply->writeInt32(0);
1624                reply->writeInt32(mDebugRegion);
1625                reply->writeInt32(mDebugBackground);
1626                return NO_ERROR;
1627            case 1013: {
1628                Mutex::Autolock _l(mStateLock);
1629                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1630                reply->writeInt32(hw.getPageFlipCount());
1631            }
1632            return NO_ERROR;
1633        }
1634    }
1635    return err;
1636}
1637
1638// ---------------------------------------------------------------------------
1639
1640sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
1641{
1642    sp<Layer> result;
1643    Mutex::Autolock _l(mStateLock);
1644    result = mLayerMap.valueFor( sur->asBinder() ).promote();
1645    return result;
1646}
1647
1648// ---------------------------------------------------------------------------
1649
1650Client::Client(const sp<SurfaceFlinger>& flinger)
1651    : mFlinger(flinger), mNameGenerator(1)
1652{
1653}
1654
1655Client::~Client()
1656{
1657    const size_t count = mLayers.size();
1658    for (size_t i=0 ; i<count ; i++) {
1659        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
1660        if (layer != 0) {
1661            mFlinger->removeLayer(layer);
1662        }
1663    }
1664}
1665
1666status_t Client::initCheck() const {
1667    return NO_ERROR;
1668}
1669
1670ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
1671{
1672    int32_t name = android_atomic_inc(&mNameGenerator);
1673    mLayers.add(name, layer);
1674    return name;
1675}
1676
1677void Client::detachLayer(const LayerBaseClient* layer)
1678{
1679    // we do a linear search here, because this doesn't happen often
1680    const size_t count = mLayers.size();
1681    for (size_t i=0 ; i<count ; i++) {
1682        if (mLayers.valueAt(i) == layer) {
1683            mLayers.removeItemsAt(i, 1);
1684            break;
1685        }
1686    }
1687}
1688sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
1689    sp<LayerBaseClient> lbc;
1690    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
1691    if (layer != 0) {
1692        lbc = layer.promote();
1693        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
1694    }
1695    return lbc;
1696}
1697
1698sp<IMemoryHeap> Client::getControlBlock() const {
1699    return 0;
1700}
1701ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
1702    return -1;
1703}
1704sp<ISurface> Client::createSurface(
1705        ISurfaceComposerClient::surface_data_t* params, int pid,
1706        const String8& name,
1707        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
1708        uint32_t flags)
1709{
1710    return mFlinger->createSurface(this, pid, name, params,
1711            display, w, h, format, flags);
1712}
1713status_t Client::destroySurface(SurfaceID sid) {
1714    return mFlinger->removeSurface(this, sid);
1715}
1716status_t Client::setState(int32_t count, const layer_state_t* states) {
1717    return mFlinger->setClientState(this, count, states);
1718}
1719
1720// ---------------------------------------------------------------------------
1721
1722UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
1723    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
1724{
1725    const int pgsize = getpagesize();
1726    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
1727
1728    mCblkHeap = new MemoryHeapBase(cblksize, 0,
1729            "SurfaceFlinger Client control-block");
1730
1731    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
1732    if (ctrlblk) { // construct the shared structure in-place.
1733        new(ctrlblk) SharedClient;
1734    }
1735}
1736
1737UserClient::~UserClient()
1738{
1739    if (ctrlblk) {
1740        ctrlblk->~SharedClient();  // destroy our shared-structure.
1741    }
1742
1743    /*
1744     * When a UserClient dies, it's unclear what to do exactly.
1745     * We could go ahead and destroy all surfaces linked to that client
1746     * however, it wouldn't be fair to the main Client
1747     * (usually the the window-manager), which might want to re-target
1748     * the layer to another UserClient.
1749     * I think the best is to do nothing, or not much; in most cases the
1750     * WM itself will go ahead and clean things up when it detects a client of
1751     * his has died.
1752     * The remaining question is what to display? currently we keep
1753     * just keep the current buffer.
1754     */
1755}
1756
1757status_t UserClient::initCheck() const {
1758    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
1759}
1760
1761void UserClient::detachLayer(const Layer* layer)
1762{
1763    int32_t name = layer->getToken();
1764    if (name >= 0) {
1765        int32_t mask = 1LU<<name;
1766        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
1767            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
1768        }
1769    }
1770}
1771
1772sp<IMemoryHeap> UserClient::getControlBlock() const {
1773    return mCblkHeap;
1774}
1775
1776ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
1777{
1778    int32_t name = NAME_NOT_FOUND;
1779    sp<Layer> layer(mFlinger->getLayer(sur));
1780    if (layer == 0) {
1781        return name;
1782    }
1783
1784    // if this layer already has a token, just return it
1785    name = layer->getToken();
1786    if ((name >= 0) && (layer->getClient() == this)) {
1787        return name;
1788    }
1789
1790    name = 0;
1791    do {
1792        int32_t mask = 1LU<<name;
1793        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
1794            // we found and locked that name
1795            status_t err = layer->setToken(
1796                    const_cast<UserClient*>(this), ctrlblk, name);
1797            if (err != NO_ERROR) {
1798                // free the name
1799                android_atomic_and(~mask, &mBitmap);
1800                name = err;
1801            }
1802            break;
1803        }
1804        if (++name > 31)
1805            name = NO_MEMORY;
1806    } while(name >= 0);
1807
1808    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
1809    //        sur->asBinder().get(), name, this, mBitmap);
1810    return name;
1811}
1812
1813sp<ISurface> UserClient::createSurface(
1814        ISurfaceComposerClient::surface_data_t* params, int pid,
1815        const String8& name,
1816        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
1817        uint32_t flags) {
1818    return 0;
1819}
1820status_t UserClient::destroySurface(SurfaceID sid) {
1821    return INVALID_OPERATION;
1822}
1823status_t UserClient::setState(int32_t count, const layer_state_t* states) {
1824    return INVALID_OPERATION;
1825}
1826
1827// ---------------------------------------------------------------------------
1828
1829GraphicPlane::GraphicPlane()
1830    : mHw(0)
1831{
1832}
1833
1834GraphicPlane::~GraphicPlane() {
1835    delete mHw;
1836}
1837
1838bool GraphicPlane::initialized() const {
1839    return mHw ? true : false;
1840}
1841
1842int GraphicPlane::getWidth() const {
1843    return mWidth;
1844}
1845
1846int GraphicPlane::getHeight() const {
1847    return mHeight;
1848}
1849
1850void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
1851{
1852    mHw = hw;
1853
1854    // initialize the display orientation transform.
1855    // it's a constant that should come from the display driver.
1856    int displayOrientation = ISurfaceComposer::eOrientationDefault;
1857    char property[PROPERTY_VALUE_MAX];
1858    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
1859        //displayOrientation
1860        switch (atoi(property)) {
1861        case 90:
1862            displayOrientation = ISurfaceComposer::eOrientation90;
1863            break;
1864        case 270:
1865            displayOrientation = ISurfaceComposer::eOrientation270;
1866            break;
1867        }
1868    }
1869
1870    const float w = hw->getWidth();
1871    const float h = hw->getHeight();
1872    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
1873            &mDisplayTransform);
1874    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
1875        mDisplayWidth = h;
1876        mDisplayHeight = w;
1877    } else {
1878        mDisplayWidth = w;
1879        mDisplayHeight = h;
1880    }
1881
1882    setOrientation(ISurfaceComposer::eOrientationDefault);
1883}
1884
1885status_t GraphicPlane::orientationToTransfrom(
1886        int orientation, int w, int h, Transform* tr)
1887{
1888    uint32_t flags = 0;
1889    switch (orientation) {
1890    case ISurfaceComposer::eOrientationDefault:
1891        flags = Transform::ROT_0;
1892        break;
1893    case ISurfaceComposer::eOrientation90:
1894        flags = Transform::ROT_90;
1895        break;
1896    case ISurfaceComposer::eOrientation180:
1897        flags = Transform::ROT_180;
1898        break;
1899    case ISurfaceComposer::eOrientation270:
1900        flags = Transform::ROT_270;
1901        break;
1902    default:
1903        return BAD_VALUE;
1904    }
1905    tr->set(flags, w, h);
1906    return NO_ERROR;
1907}
1908
1909status_t GraphicPlane::setOrientation(int orientation)
1910{
1911    // If the rotation can be handled in hardware, this is where
1912    // the magic should happen.
1913
1914    const DisplayHardware& hw(displayHardware());
1915    const float w = mDisplayWidth;
1916    const float h = mDisplayHeight;
1917    mWidth = int(w);
1918    mHeight = int(h);
1919
1920    Transform orientationTransform;
1921    GraphicPlane::orientationToTransfrom(orientation, w, h,
1922            &orientationTransform);
1923    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
1924        mWidth = int(h);
1925        mHeight = int(w);
1926    }
1927
1928    mOrientation = orientation;
1929    mGlobalTransform = mDisplayTransform * orientationTransform;
1930    return NO_ERROR;
1931}
1932
1933const DisplayHardware& GraphicPlane::displayHardware() const {
1934    return *mHw;
1935}
1936
1937const Transform& GraphicPlane::transform() const {
1938    return mGlobalTransform;
1939}
1940
1941EGLDisplay GraphicPlane::getEGLDisplay() const {
1942    return mHw->getEGLDisplay();
1943}
1944
1945// ---------------------------------------------------------------------------
1946
1947}; // namespace android
1948