SurfaceFlinger.cpp revision c479e18db0216f7096fefe85ffa71ab00329aef3 
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        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    if (UNLIKELY(mHwWorkListDirty)) {
375        // build the h/w work list
376        handleWorkList();
377    }
378
379    const DisplayHardware& hw(graphicPlane(0).displayHardware());
380    if (LIKELY(hw.canDraw() && !isFrozen())) {
381        // repaint the framebuffer (if needed)
382
383        const int index = hw.getCurrentBufferIndex();
384        GraphicLog& logger(GraphicLog::getInstance());
385
386        logger.log(GraphicLog::SF_REPAINT, index);
387        handleRepaint();
388
389        // inform the h/w that we're done compositing
390        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
391        hw.compositionComplete();
392
393        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
394        postFramebuffer();
395
396        logger.log(GraphicLog::SF_UNLOCK_CLIENTS, index);
397        unlockClients();
398
399        logger.log(GraphicLog::SF_REPAINT_DONE, index);
400    } else {
401        // pretend we did the post
402        unlockClients();
403        usleep(16667); // 60 fps period
404    }
405    return true;
406}
407
408void SurfaceFlinger::postFramebuffer()
409{
410    if (!mInvalidRegion.isEmpty()) {
411        const DisplayHardware& hw(graphicPlane(0).displayHardware());
412        const nsecs_t now = systemTime();
413        mDebugInSwapBuffers = now;
414        hw.flip(mInvalidRegion);
415        mLastSwapBufferTime = systemTime() - now;
416        mDebugInSwapBuffers = 0;
417        mInvalidRegion.clear();
418    }
419}
420
421void SurfaceFlinger::handleConsoleEvents()
422{
423    // something to do with the console
424    const DisplayHardware& hw = graphicPlane(0).displayHardware();
425
426    int what = android_atomic_and(0, &mConsoleSignals);
427    if (what & eConsoleAcquired) {
428        hw.acquireScreen();
429    }
430
431    if (mDeferReleaseConsole && hw.canDraw()) {
432        // We got the release signal before the acquire signal
433        mDeferReleaseConsole = false;
434        hw.releaseScreen();
435    }
436
437    if (what & eConsoleReleased) {
438        if (hw.canDraw()) {
439            hw.releaseScreen();
440        } else {
441            mDeferReleaseConsole = true;
442        }
443    }
444
445    mDirtyRegion.set(hw.bounds());
446}
447
448void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
449{
450    Vector< sp<LayerBase> > ditchedLayers;
451
452    /*
453     * Perform and commit the transaction
454     */
455
456    { // scope for the lock
457        Mutex::Autolock _l(mStateLock);
458        const nsecs_t now = systemTime();
459        mDebugInTransaction = now;
460        handleTransactionLocked(transactionFlags, ditchedLayers);
461        mLastTransactionTime = systemTime() - now;
462        mDebugInTransaction = 0;
463        mHwWorkListDirty = true;
464        // here the transaction has been committed
465    }
466
467    /*
468     * Clean-up all layers that went away
469     * (do this without the lock held)
470     */
471
472    const size_t count = ditchedLayers.size();
473    for (size_t i=0 ; i<count ; i++) {
474        if (ditchedLayers[i] != 0) {
475            //LOGD("ditching layer %p", ditchedLayers[i].get());
476            ditchedLayers[i]->ditch();
477        }
478    }
479}
480
481void SurfaceFlinger::handleTransactionLocked(
482        uint32_t transactionFlags, Vector< sp<LayerBase> >& ditchedLayers)
483{
484    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
485    const size_t count = currentLayers.size();
486
487    /*
488     * Traversal of the children
489     * (perform the transaction for each of them if needed)
490     */
491
492    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
493    if (layersNeedTransaction) {
494        for (size_t i=0 ; i<count ; i++) {
495            const sp<LayerBase>& layer = currentLayers[i];
496            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
497            if (!trFlags) continue;
498
499            const uint32_t flags = layer->doTransaction(0);
500            if (flags & Layer::eVisibleRegion)
501                mVisibleRegionsDirty = true;
502        }
503    }
504
505    /*
506     * Perform our own transaction if needed
507     */
508
509    if (transactionFlags & eTransactionNeeded) {
510        if (mCurrentState.orientation != mDrawingState.orientation) {
511            // the orientation has changed, recompute all visible regions
512            // and invalidate everything.
513
514            const int dpy = 0;
515            const int orientation = mCurrentState.orientation;
516            const uint32_t type = mCurrentState.orientationType;
517            GraphicPlane& plane(graphicPlane(dpy));
518            plane.setOrientation(orientation);
519
520            // update the shared control block
521            const DisplayHardware& hw(plane.displayHardware());
522            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
523            dcblk->orientation = orientation;
524            dcblk->w = plane.getWidth();
525            dcblk->h = plane.getHeight();
526
527            mVisibleRegionsDirty = true;
528            mDirtyRegion.set(hw.bounds());
529        }
530
531        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
532            // freezing or unfreezing the display -> trigger animation if needed
533            mFreezeDisplay = mCurrentState.freezeDisplay;
534            if (mFreezeDisplay)
535                 mFreezeDisplayTime = 0;
536        }
537
538        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
539            // layers have been added
540            mVisibleRegionsDirty = true;
541        }
542
543        // some layers might have been removed, so
544        // we need to update the regions they're exposing.
545        if (mLayersRemoved) {
546            mLayersRemoved = false;
547            mVisibleRegionsDirty = true;
548            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
549            const size_t count = previousLayers.size();
550            for (size_t i=0 ; i<count ; i++) {
551                const sp<LayerBase>& layer(previousLayers[i]);
552                if (currentLayers.indexOf( layer ) < 0) {
553                    // this layer is not visible anymore
554                    ditchedLayers.add(layer);
555                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
556                }
557            }
558        }
559    }
560
561    commitTransaction();
562}
563
564sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
565{
566    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
567}
568
569void SurfaceFlinger::computeVisibleRegions(
570    LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
571{
572    const GraphicPlane& plane(graphicPlane(0));
573    const Transform& planeTransform(plane.transform());
574    const DisplayHardware& hw(plane.displayHardware());
575    const Region screenRegion(hw.bounds());
576
577    Region aboveOpaqueLayers;
578    Region aboveCoveredLayers;
579    Region dirty;
580
581    bool secureFrameBuffer = false;
582
583    size_t i = currentLayers.size();
584    while (i--) {
585        const sp<LayerBase>& layer = currentLayers[i];
586        layer->validateVisibility(planeTransform);
587
588        // start with the whole surface at its current location
589        const Layer::State& s(layer->drawingState());
590
591        /*
592         * opaqueRegion: area of a surface that is fully opaque.
593         */
594        Region opaqueRegion;
595
596        /*
597         * visibleRegion: area of a surface that is visible on screen
598         * and not fully transparent. This is essentially the layer's
599         * footprint minus the opaque regions above it.
600         * Areas covered by a translucent surface are considered visible.
601         */
602        Region visibleRegion;
603
604        /*
605         * coveredRegion: area of a surface that is covered by all
606         * visible regions above it (which includes the translucent areas).
607         */
608        Region coveredRegion;
609
610
611        // handle hidden surfaces by setting the visible region to empty
612        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
613            const bool translucent = layer->needsBlending();
614            const Rect bounds(layer->visibleBounds());
615            visibleRegion.set(bounds);
616            visibleRegion.andSelf(screenRegion);
617            if (!visibleRegion.isEmpty()) {
618                // Remove the transparent area from the visible region
619                if (translucent) {
620                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
621                }
622
623                // compute the opaque region
624                const int32_t layerOrientation = layer->getOrientation();
625                if (s.alpha==255 && !translucent &&
626                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
627                    // the opaque region is the layer's footprint
628                    opaqueRegion = visibleRegion;
629                }
630            }
631        }
632
633        // Clip the covered region to the visible region
634        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
635
636        // Update aboveCoveredLayers for next (lower) layer
637        aboveCoveredLayers.orSelf(visibleRegion);
638
639        // subtract the opaque region covered by the layers above us
640        visibleRegion.subtractSelf(aboveOpaqueLayers);
641
642        // compute this layer's dirty region
643        if (layer->contentDirty) {
644            // we need to invalidate the whole region
645            dirty = visibleRegion;
646            // as well, as the old visible region
647            dirty.orSelf(layer->visibleRegionScreen);
648            layer->contentDirty = false;
649        } else {
650            /* compute the exposed region:
651             *   the exposed region consists of two components:
652             *   1) what's VISIBLE now and was COVERED before
653             *   2) what's EXPOSED now less what was EXPOSED before
654             *
655             * note that (1) is conservative, we start with the whole
656             * visible region but only keep what used to be covered by
657             * something -- which mean it may have been exposed.
658             *
659             * (2) handles areas that were not covered by anything but got
660             * exposed because of a resize.
661             */
662            const Region newExposed = visibleRegion - coveredRegion;
663            const Region oldVisibleRegion = layer->visibleRegionScreen;
664            const Region oldCoveredRegion = layer->coveredRegionScreen;
665            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
666            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
667        }
668        dirty.subtractSelf(aboveOpaqueLayers);
669
670        // accumulate to the screen dirty region
671        dirtyRegion.orSelf(dirty);
672
673        // Update aboveOpaqueLayers for next (lower) layer
674        aboveOpaqueLayers.orSelf(opaqueRegion);
675
676        // Store the visible region is screen space
677        layer->setVisibleRegion(visibleRegion);
678        layer->setCoveredRegion(coveredRegion);
679
680        // If a secure layer is partially visible, lock-down the screen!
681        if (layer->isSecure() && !visibleRegion.isEmpty()) {
682            secureFrameBuffer = true;
683        }
684    }
685
686    // invalidate the areas where a layer was removed
687    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
688    mDirtyRegionRemovedLayer.clear();
689
690    mSecureFrameBuffer = secureFrameBuffer;
691    opaqueRegion = aboveOpaqueLayers;
692}
693
694
695void SurfaceFlinger::commitTransaction()
696{
697    mDrawingState = mCurrentState;
698    mResizeTransationPending = false;
699    mTransactionCV.broadcast();
700}
701
702void SurfaceFlinger::handlePageFlip()
703{
704    bool visibleRegions = mVisibleRegionsDirty;
705    LayerVector& currentLayers(
706            const_cast<LayerVector&>(mDrawingState.layersSortedByZ));
707    visibleRegions |= lockPageFlip(currentLayers);
708
709        const DisplayHardware& hw = graphicPlane(0).displayHardware();
710        const Region screenRegion(hw.bounds());
711        if (visibleRegions) {
712            Region opaqueRegion;
713            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
714
715            /*
716             *  rebuild the visible layer list
717             */
718            mVisibleLayersSortedByZ.clear();
719            const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
720            size_t count = currentLayers.size();
721            mVisibleLayersSortedByZ.setCapacity(count);
722            for (size_t i=0 ; i<count ; i++) {
723                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
724                    mVisibleLayersSortedByZ.add(currentLayers[i]);
725            }
726
727            mWormholeRegion = screenRegion.subtract(opaqueRegion);
728            mVisibleRegionsDirty = false;
729            mHwWorkListDirty = true;
730        }
731
732    unlockPageFlip(currentLayers);
733    mDirtyRegion.andSelf(screenRegion);
734}
735
736bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
737{
738    bool recomputeVisibleRegions = false;
739    size_t count = currentLayers.size();
740    sp<LayerBase> const* layers = currentLayers.array();
741    for (size_t i=0 ; i<count ; i++) {
742        const sp<LayerBase>& layer(layers[i]);
743        layer->lockPageFlip(recomputeVisibleRegions);
744    }
745    return recomputeVisibleRegions;
746}
747
748void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
749{
750    const GraphicPlane& plane(graphicPlane(0));
751    const Transform& planeTransform(plane.transform());
752    size_t count = currentLayers.size();
753    sp<LayerBase> const* layers = currentLayers.array();
754    for (size_t i=0 ; i<count ; i++) {
755        const sp<LayerBase>& layer(layers[i]);
756        layer->unlockPageFlip(planeTransform, mDirtyRegion);
757    }
758}
759
760void SurfaceFlinger::handleWorkList()
761{
762    mHwWorkListDirty = false;
763    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
764    if (hwc.initCheck() == NO_ERROR) {
765        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
766        const size_t count = currentLayers.size();
767        hwc.createWorkList(count);
768        hwc_layer_t* const cur(hwc.getLayers());
769        for (size_t i=0 ; cur && i<count ; i++) {
770            currentLayers[i]->setGeometry(&cur[i]);
771        }
772    }
773}
774
775void SurfaceFlinger::handleRepaint()
776{
777    // compute the invalid region
778    mInvalidRegion.orSelf(mDirtyRegion);
779    if (mInvalidRegion.isEmpty()) {
780        // nothing to do
781        return;
782    }
783
784    if (UNLIKELY(mDebugRegion)) {
785        debugFlashRegions();
786    }
787
788    // set the frame buffer
789    const DisplayHardware& hw(graphicPlane(0).displayHardware());
790    glMatrixMode(GL_MODELVIEW);
791    glLoadIdentity();
792
793    uint32_t flags = hw.getFlags();
794    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
795        (flags & DisplayHardware::BUFFER_PRESERVED))
796    {
797        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
798        // takes a rectangle, we must make sure to update that whole
799        // rectangle in that case
800        if (flags & DisplayHardware::SWAP_RECTANGLE) {
801            // TODO: we really should be able to pass a region to
802            // SWAP_RECTANGLE so that we don't have to redraw all this.
803            mDirtyRegion.set(mInvalidRegion.bounds());
804        } else {
805            // in the BUFFER_PRESERVED case, obviously, we can update only
806            // what's needed and nothing more.
807            // NOTE: this is NOT a common case, as preserving the backbuffer
808            // is costly and usually involves copying the whole update back.
809        }
810    } else {
811        if (flags & DisplayHardware::PARTIAL_UPDATES) {
812            // We need to redraw the rectangle that will be updated
813            // (pushed to the framebuffer).
814            // This is needed because PARTIAL_UPDATES only takes one
815            // rectangle instead of a region (see DisplayHardware::flip())
816            mDirtyRegion.set(mInvalidRegion.bounds());
817        } else {
818            // we need to redraw everything (the whole screen)
819            mDirtyRegion.set(hw.bounds());
820            mInvalidRegion = mDirtyRegion;
821        }
822    }
823
824    // compose all surfaces
825    composeSurfaces(mDirtyRegion);
826
827    // clear the dirty regions
828    mDirtyRegion.clear();
829}
830
831void SurfaceFlinger::composeSurfaces(const Region& dirty)
832{
833    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
834        // should never happen unless the window manager has a bug
835        // draw something...
836        drawWormhole();
837    }
838
839    status_t err = NO_ERROR;
840    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
841    size_t count = layers.size();
842
843    const DisplayHardware& hw(graphicPlane(0).displayHardware());
844    HWComposer& hwc(hw.getHwComposer());
845    hwc_layer_t* const cur(hwc.getLayers());
846
847    LOGE_IF(cur && hwc.getNumLayers() != count,
848            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
849            hwc.getNumLayers(), count);
850
851    // just to be extra-safe, use the smallest count
852    if (hwc.initCheck() == NO_ERROR) {
853        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
854    }
855
856    /*
857     *  update the per-frame h/w composer data for each layer
858     *  and build the transparent region of the FB
859     */
860    Region transparent;
861    if (cur) {
862        for (size_t i=0 ; i<count ; i++) {
863            const sp<LayerBase>& layer(layers[i]);
864            layer->setPerFrameData(&cur[i]);
865            if (cur[i].hints & HWC_HINT_CLEAR_FB) {
866                if (!(layer->needsBlending())) {
867                    transparent.orSelf(layer->visibleRegionScreen);
868                }
869            }
870        }
871        err = hwc.prepare();
872        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
873    }
874
875    /*
876     *  clear the area of the FB that need to be transparent
877     */
878    transparent.andSelf(dirty);
879    if (!transparent.isEmpty()) {
880        glClearColor(0,0,0,0);
881        Region::const_iterator it = transparent.begin();
882        Region::const_iterator const end = transparent.end();
883        const int32_t height = hw.getHeight();
884        while (it != end) {
885            const Rect& r(*it++);
886            const GLint sy = height - (r.top + r.height());
887            glScissor(r.left, sy, r.width(), r.height());
888            glClear(GL_COLOR_BUFFER_BIT);
889        }
890    }
891
892
893    /*
894     * and then, render the layers targeted at the framebuffer
895     */
896    for (size_t i=0 ; i<count ; i++) {
897        if (cur) {
898            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
899                !(cur[i].flags & HWC_SKIP_LAYER)) {
900                // skip layers handled by the HAL
901                continue;
902            }
903        }
904        const sp<LayerBase>& layer(layers[i]);
905        const Region clip(dirty.intersect(layer->visibleRegionScreen));
906        if (!clip.isEmpty()) {
907            layer->draw(clip);
908        }
909    }
910}
911
912void SurfaceFlinger::unlockClients()
913{
914    const LayerVector& drawingLayers(mDrawingState.layersSortedByZ);
915    const size_t count = drawingLayers.size();
916    sp<LayerBase> const* const layers = drawingLayers.array();
917    for (size_t i=0 ; i<count ; ++i) {
918        const sp<LayerBase>& layer = layers[i];
919        layer->finishPageFlip();
920    }
921}
922
923void SurfaceFlinger::debugFlashRegions()
924{
925    const DisplayHardware& hw(graphicPlane(0).displayHardware());
926    const uint32_t flags = hw.getFlags();
927
928    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
929            (flags & DisplayHardware::BUFFER_PRESERVED))) {
930        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
931                mDirtyRegion.bounds() : hw.bounds());
932        composeSurfaces(repaint);
933    }
934
935    TextureManager::deactivateTextures();
936
937    glDisable(GL_BLEND);
938    glDisable(GL_DITHER);
939    glDisable(GL_SCISSOR_TEST);
940
941    static int toggle = 0;
942    toggle = 1 - toggle;
943    if (toggle) {
944        glColor4f(1, 0, 1, 1);
945    } else {
946        glColor4f(1, 1, 0, 1);
947    }
948
949    Region::const_iterator it = mDirtyRegion.begin();
950    Region::const_iterator const end = mDirtyRegion.end();
951    while (it != end) {
952        const Rect& r = *it++;
953        GLfloat vertices[][2] = {
954                { r.left,  r.top },
955                { r.left,  r.bottom },
956                { r.right, r.bottom },
957                { r.right, r.top }
958        };
959        glVertexPointer(2, GL_FLOAT, 0, vertices);
960        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
961    }
962
963    if (mInvalidRegion.isEmpty()) {
964        mDirtyRegion.dump("mDirtyRegion");
965        mInvalidRegion.dump("mInvalidRegion");
966    }
967    hw.flip(mInvalidRegion);
968
969    if (mDebugRegion > 1)
970        usleep(mDebugRegion * 1000);
971
972    glEnable(GL_SCISSOR_TEST);
973    //mDirtyRegion.dump("mDirtyRegion");
974}
975
976void SurfaceFlinger::drawWormhole() const
977{
978    const Region region(mWormholeRegion.intersect(mDirtyRegion));
979    if (region.isEmpty())
980        return;
981
982    const DisplayHardware& hw(graphicPlane(0).displayHardware());
983    const int32_t width = hw.getWidth();
984    const int32_t height = hw.getHeight();
985
986    glDisable(GL_BLEND);
987    glDisable(GL_DITHER);
988
989    if (LIKELY(!mDebugBackground)) {
990        glClearColor(0,0,0,0);
991        Region::const_iterator it = region.begin();
992        Region::const_iterator const end = region.end();
993        while (it != end) {
994            const Rect& r = *it++;
995            const GLint sy = height - (r.top + r.height());
996            glScissor(r.left, sy, r.width(), r.height());
997            glClear(GL_COLOR_BUFFER_BIT);
998        }
999    } else {
1000        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1001                { width, height }, { 0, height }  };
1002        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1003        glVertexPointer(2, GL_SHORT, 0, vertices);
1004        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1005        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1006#if defined(GL_OES_texture_external)
1007        if (GLExtensions::getInstance().haveTextureExternal()) {
1008            glDisable(GL_TEXTURE_EXTERNAL_OES);
1009        }
1010#endif
1011        glEnable(GL_TEXTURE_2D);
1012        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1013        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1014        glMatrixMode(GL_TEXTURE);
1015        glLoadIdentity();
1016        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1017        Region::const_iterator it = region.begin();
1018        Region::const_iterator const end = region.end();
1019        while (it != end) {
1020            const Rect& r = *it++;
1021            const GLint sy = height - (r.top + r.height());
1022            glScissor(r.left, sy, r.width(), r.height());
1023            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1024        }
1025        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1026    }
1027}
1028
1029void SurfaceFlinger::debugShowFPS() const
1030{
1031    static int mFrameCount;
1032    static int mLastFrameCount = 0;
1033    static nsecs_t mLastFpsTime = 0;
1034    static float mFps = 0;
1035    mFrameCount++;
1036    nsecs_t now = systemTime();
1037    nsecs_t diff = now - mLastFpsTime;
1038    if (diff > ms2ns(250)) {
1039        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1040        mLastFpsTime = now;
1041        mLastFrameCount = mFrameCount;
1042    }
1043    // XXX: mFPS has the value we want
1044 }
1045
1046status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1047{
1048    Mutex::Autolock _l(mStateLock);
1049    addLayer_l(layer);
1050    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1051    return NO_ERROR;
1052}
1053
1054status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1055{
1056    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1057    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1058}
1059
1060ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1061        const sp<LayerBaseClient>& lbc)
1062{
1063    Mutex::Autolock _l(mStateLock);
1064
1065    // attach this layer to the client
1066    ssize_t name = client->attachLayer(lbc);
1067
1068    // add this layer to the current state list
1069    addLayer_l(lbc);
1070
1071    return name;
1072}
1073
1074status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1075{
1076    Mutex::Autolock _l(mStateLock);
1077    status_t err = purgatorizeLayer_l(layer);
1078    if (err == NO_ERROR)
1079        setTransactionFlags(eTransactionNeeded);
1080    return err;
1081}
1082
1083status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1084{
1085    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1086    if (lbc != 0) {
1087        mLayerMap.removeItem( lbc->getSurface()->asBinder() );
1088    }
1089    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1090    if (index >= 0) {
1091        mLayersRemoved = true;
1092        return NO_ERROR;
1093    }
1094    return status_t(index);
1095}
1096
1097status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1098{
1099    // remove the layer from the main list (through a transaction).
1100    ssize_t err = removeLayer_l(layerBase);
1101
1102    layerBase->onRemoved();
1103
1104    // it's possible that we don't find a layer, because it might
1105    // have been destroyed already -- this is not technically an error
1106    // from the user because there is a race between Client::destroySurface(),
1107    // ~Client() and ~ISurface().
1108    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1109}
1110
1111status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1112{
1113    layer->forceVisibilityTransaction();
1114    setTransactionFlags(eTraversalNeeded);
1115    return NO_ERROR;
1116}
1117
1118uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1119{
1120    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1121}
1122
1123uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1124{
1125    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1126    if ((old & flags)==0) { // wake the server up
1127        signalEvent();
1128    }
1129    return old;
1130}
1131
1132void SurfaceFlinger::openGlobalTransaction()
1133{
1134    android_atomic_inc(&mTransactionCount);
1135}
1136
1137void SurfaceFlinger::closeGlobalTransaction()
1138{
1139    if (android_atomic_dec(&mTransactionCount) == 1) {
1140        signalEvent();
1141
1142        // if there is a transaction with a resize, wait for it to
1143        // take effect before returning.
1144        Mutex::Autolock _l(mStateLock);
1145        while (mResizeTransationPending) {
1146            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1147            if (CC_UNLIKELY(err != NO_ERROR)) {
1148                // just in case something goes wrong in SF, return to the
1149                // called after a few seconds.
1150                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1151                mResizeTransationPending = false;
1152                break;
1153            }
1154        }
1155    }
1156}
1157
1158status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1159{
1160    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1161        return BAD_VALUE;
1162
1163    Mutex::Autolock _l(mStateLock);
1164    mCurrentState.freezeDisplay = 1;
1165    setTransactionFlags(eTransactionNeeded);
1166
1167    // flags is intended to communicate some sort of animation behavior
1168    // (for instance fading)
1169    return NO_ERROR;
1170}
1171
1172status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1173{
1174    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1175        return BAD_VALUE;
1176
1177    Mutex::Autolock _l(mStateLock);
1178    mCurrentState.freezeDisplay = 0;
1179    setTransactionFlags(eTransactionNeeded);
1180
1181    // flags is intended to communicate some sort of animation behavior
1182    // (for instance fading)
1183    return NO_ERROR;
1184}
1185
1186int SurfaceFlinger::setOrientation(DisplayID dpy,
1187        int orientation, uint32_t flags)
1188{
1189    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1190        return BAD_VALUE;
1191
1192    Mutex::Autolock _l(mStateLock);
1193    if (mCurrentState.orientation != orientation) {
1194        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1195            mCurrentState.orientationType = flags;
1196            mCurrentState.orientation = orientation;
1197            setTransactionFlags(eTransactionNeeded);
1198            mTransactionCV.wait(mStateLock);
1199        } else {
1200            orientation = BAD_VALUE;
1201        }
1202    }
1203    return orientation;
1204}
1205
1206sp<ISurface> SurfaceFlinger::createSurface(const sp<Client>& client, int pid,
1207        const String8& name, ISurfaceComposerClient::surface_data_t* params,
1208        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1209        uint32_t flags)
1210{
1211    sp<LayerBaseClient> layer;
1212    sp<LayerBaseClient::Surface> surfaceHandle;
1213
1214    if (int32_t(w|h) < 0) {
1215        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1216                int(w), int(h));
1217        return surfaceHandle;
1218    }
1219
1220    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1221    sp<Layer> normalLayer;
1222    switch (flags & eFXSurfaceMask) {
1223        case eFXSurfaceNormal:
1224#if HAS_PUSH_BUFFERS
1225            if (UNLIKELY(flags & ePushBuffers)) {
1226                layer = createPushBuffersSurface(client, d, w, h, flags);
1227            } else
1228#endif
1229            {
1230                normalLayer = createNormalSurface(client, d, w, h, flags, format);
1231                layer = normalLayer;
1232            }
1233            break;
1234        case eFXSurfaceBlur:
1235            layer = createBlurSurface(client, d, w, h, flags);
1236            break;
1237        case eFXSurfaceDim:
1238            layer = createDimSurface(client, d, w, h, flags);
1239            break;
1240    }
1241
1242    if (layer != 0) {
1243        layer->initStates(w, h, flags);
1244        layer->setName(name);
1245        ssize_t token = addClientLayer(client, layer);
1246
1247        surfaceHandle = layer->getSurface();
1248        if (surfaceHandle != 0) {
1249            params->token = token;
1250            params->identity = surfaceHandle->getIdentity();
1251            params->width = w;
1252            params->height = h;
1253            params->format = format;
1254            if (normalLayer != 0) {
1255                Mutex::Autolock _l(mStateLock);
1256                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1257            }
1258        }
1259
1260        setTransactionFlags(eTransactionNeeded);
1261    }
1262
1263    return surfaceHandle;
1264}
1265
1266sp<Layer> SurfaceFlinger::createNormalSurface(
1267        const sp<Client>& client, DisplayID display,
1268        uint32_t w, uint32_t h, uint32_t flags,
1269        PixelFormat& format)
1270{
1271    // initialize the surfaces
1272    switch (format) { // TODO: take h/w into account
1273    case PIXEL_FORMAT_TRANSPARENT:
1274    case PIXEL_FORMAT_TRANSLUCENT:
1275        format = PIXEL_FORMAT_RGBA_8888;
1276        break;
1277    case PIXEL_FORMAT_OPAQUE:
1278#ifdef NO_RGBX_8888
1279        format = PIXEL_FORMAT_RGB_565;
1280#else
1281        format = PIXEL_FORMAT_RGBX_8888;
1282#endif
1283        break;
1284    }
1285
1286#ifdef NO_RGBX_8888
1287    if (format == PIXEL_FORMAT_RGBX_8888)
1288        format = PIXEL_FORMAT_RGBA_8888;
1289#endif
1290
1291    sp<Layer> layer = new Layer(this, display, client);
1292    status_t err = layer->setBuffers(w, h, format, flags);
1293    if (LIKELY(err != NO_ERROR)) {
1294        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1295        layer.clear();
1296    }
1297    return layer;
1298}
1299
1300sp<LayerBlur> SurfaceFlinger::createBlurSurface(
1301        const sp<Client>& client, DisplayID display,
1302        uint32_t w, uint32_t h, uint32_t flags)
1303{
1304    sp<LayerBlur> layer = new LayerBlur(this, display, client);
1305    layer->initStates(w, h, flags);
1306    return layer;
1307}
1308
1309sp<LayerDim> SurfaceFlinger::createDimSurface(
1310        const sp<Client>& client, DisplayID display,
1311        uint32_t w, uint32_t h, uint32_t flags)
1312{
1313    sp<LayerDim> layer = new LayerDim(this, display, client);
1314    layer->initStates(w, h, flags);
1315    return layer;
1316}
1317
1318sp<LayerBuffer> SurfaceFlinger::createPushBuffersSurface(
1319        const sp<Client>& client, DisplayID display,
1320        uint32_t w, uint32_t h, uint32_t flags)
1321{
1322    sp<LayerBuffer> layer = new LayerBuffer(this, display, client);
1323    layer->initStates(w, h, flags);
1324    return layer;
1325}
1326
1327status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1328{
1329    /*
1330     * called by the window manager, when a surface should be marked for
1331     * destruction.
1332     *
1333     * The surface is removed from the current and drawing lists, but placed
1334     * in the purgatory queue, so it's not destroyed right-away (we need
1335     * to wait for all client's references to go away first).
1336     */
1337
1338    status_t err = NAME_NOT_FOUND;
1339    Mutex::Autolock _l(mStateLock);
1340    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1341    if (layer != 0) {
1342        err = purgatorizeLayer_l(layer);
1343        if (err == NO_ERROR) {
1344            setTransactionFlags(eTransactionNeeded);
1345        }
1346    }
1347    return err;
1348}
1349
1350status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1351{
1352    // called by ~ISurface() when all references are gone
1353
1354    class MessageDestroySurface : public MessageBase {
1355        SurfaceFlinger* flinger;
1356        sp<LayerBaseClient> layer;
1357    public:
1358        MessageDestroySurface(
1359                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1360            : flinger(flinger), layer(layer) { }
1361        virtual bool handler() {
1362            sp<LayerBaseClient> l(layer);
1363            layer.clear(); // clear it outside of the lock;
1364            Mutex::Autolock _l(flinger->mStateLock);
1365            /*
1366             * remove the layer from the current list -- chances are that it's
1367             * not in the list anyway, because it should have been removed
1368             * already upon request of the client (eg: window manager).
1369             * However, a buggy client could have not done that.
1370             * Since we know we don't have any more clients, we don't need
1371             * to use the purgatory.
1372             */
1373            status_t err = flinger->removeLayer_l(l);
1374            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1375                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1376            return true;
1377        }
1378    };
1379
1380    postMessageAsync( new MessageDestroySurface(this, layer) );
1381    return NO_ERROR;
1382}
1383
1384status_t SurfaceFlinger::setClientState(
1385        const sp<Client>& client,
1386        int32_t count,
1387        const layer_state_t* states)
1388{
1389    Mutex::Autolock _l(mStateLock);
1390    uint32_t flags = 0;
1391    for (int i=0 ; i<count ; i++) {
1392        const layer_state_t& s(states[i]);
1393        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1394        if (layer != 0) {
1395            const uint32_t what = s.what;
1396            if (what & ePositionChanged) {
1397                if (layer->setPosition(s.x, s.y))
1398                    flags |= eTraversalNeeded;
1399            }
1400            if (what & eLayerChanged) {
1401                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1402                if (layer->setLayer(s.z)) {
1403                    mCurrentState.layersSortedByZ.removeAt(idx);
1404                    mCurrentState.layersSortedByZ.add(layer);
1405                    // we need traversal (state changed)
1406                    // AND transaction (list changed)
1407                    flags |= eTransactionNeeded|eTraversalNeeded;
1408                }
1409            }
1410            if (what & eSizeChanged) {
1411                if (layer->setSize(s.w, s.h)) {
1412                    flags |= eTraversalNeeded;
1413                    mResizeTransationPending = true;
1414                }
1415            }
1416            if (what & eAlphaChanged) {
1417                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1418                    flags |= eTraversalNeeded;
1419            }
1420            if (what & eMatrixChanged) {
1421                if (layer->setMatrix(s.matrix))
1422                    flags |= eTraversalNeeded;
1423            }
1424            if (what & eTransparentRegionChanged) {
1425                if (layer->setTransparentRegionHint(s.transparentRegion))
1426                    flags |= eTraversalNeeded;
1427            }
1428            if (what & eVisibilityChanged) {
1429                if (layer->setFlags(s.flags, s.mask))
1430                    flags |= eTraversalNeeded;
1431            }
1432        }
1433    }
1434    if (flags) {
1435        setTransactionFlags(flags);
1436    }
1437    return NO_ERROR;
1438}
1439
1440void SurfaceFlinger::screenReleased(int dpy)
1441{
1442    // this may be called by a signal handler, we can't do too much in here
1443    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1444    signalEvent();
1445}
1446
1447void SurfaceFlinger::screenAcquired(int dpy)
1448{
1449    // this may be called by a signal handler, we can't do too much in here
1450    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1451    signalEvent();
1452}
1453
1454status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1455{
1456    const size_t SIZE = 1024;
1457    char buffer[SIZE];
1458    String8 result;
1459    if (!mDump.checkCalling()) {
1460        snprintf(buffer, SIZE, "Permission Denial: "
1461                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1462                IPCThreadState::self()->getCallingPid(),
1463                IPCThreadState::self()->getCallingUid());
1464        result.append(buffer);
1465    } else {
1466
1467        // figure out if we're stuck somewhere
1468        const nsecs_t now = systemTime();
1469        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1470        const nsecs_t inTransaction(mDebugInTransaction);
1471        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1472        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1473
1474        // Try to get the main lock, but don't insist if we can't
1475        // (this would indicate SF is stuck, but we want to be able to
1476        // print something in dumpsys).
1477        int retry = 3;
1478        while (mStateLock.tryLock()<0 && --retry>=0) {
1479            usleep(1000000);
1480        }
1481        const bool locked(retry >= 0);
1482        if (!locked) {
1483            snprintf(buffer, SIZE,
1484                    "SurfaceFlinger appears to be unresponsive, "
1485                    "dumping anyways (no locks held)\n");
1486            result.append(buffer);
1487        }
1488
1489        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1490        const size_t count = currentLayers.size();
1491        for (size_t i=0 ; i<count ; i++) {
1492            const sp<LayerBase>& layer(currentLayers[i]);
1493            layer->dump(result, buffer, SIZE);
1494            const Layer::State& s(layer->drawingState());
1495            s.transparentRegion.dump(result, "transparentRegion");
1496            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1497            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1498        }
1499
1500        mWormholeRegion.dump(result, "WormholeRegion");
1501        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1502        snprintf(buffer, SIZE,
1503                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1504                mFreezeDisplay?"yes":"no", mFreezeCount,
1505                mCurrentState.orientation, hw.canDraw());
1506        result.append(buffer);
1507        snprintf(buffer, SIZE,
1508                "  last eglSwapBuffers() time: %f us\n"
1509                "  last transaction time     : %f us\n",
1510                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1511        result.append(buffer);
1512
1513        if (inSwapBuffersDuration || !locked) {
1514            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1515                    inSwapBuffersDuration/1000.0);
1516            result.append(buffer);
1517        }
1518
1519        if (inTransactionDuration || !locked) {
1520            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1521                    inTransactionDuration/1000.0);
1522            result.append(buffer);
1523        }
1524
1525        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1526        alloc.dump(result);
1527
1528        if (locked) {
1529            mStateLock.unlock();
1530        }
1531    }
1532    write(fd, result.string(), result.size());
1533    return NO_ERROR;
1534}
1535
1536status_t SurfaceFlinger::onTransact(
1537    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1538{
1539    switch (code) {
1540        case CREATE_CONNECTION:
1541        case OPEN_GLOBAL_TRANSACTION:
1542        case CLOSE_GLOBAL_TRANSACTION:
1543        case SET_ORIENTATION:
1544        case FREEZE_DISPLAY:
1545        case UNFREEZE_DISPLAY:
1546        case BOOT_FINISHED:
1547        {
1548            // codes that require permission check
1549            IPCThreadState* ipc = IPCThreadState::self();
1550            const int pid = ipc->getCallingPid();
1551            const int uid = ipc->getCallingUid();
1552            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1553                LOGE("Permission Denial: "
1554                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1555                return PERMISSION_DENIED;
1556            }
1557        }
1558    }
1559    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1560    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1561        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1562        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1563            IPCThreadState* ipc = IPCThreadState::self();
1564            const int pid = ipc->getCallingPid();
1565            const int uid = ipc->getCallingUid();
1566            LOGE("Permission Denial: "
1567                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1568            return PERMISSION_DENIED;
1569        }
1570        int n;
1571        switch (code) {
1572            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1573            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1574                return NO_ERROR;
1575            case 1002:  // SHOW_UPDATES
1576                n = data.readInt32();
1577                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1578                return NO_ERROR;
1579            case 1003:  // SHOW_BACKGROUND
1580                n = data.readInt32();
1581                mDebugBackground = n ? 1 : 0;
1582                return NO_ERROR;
1583            case 1004:{ // repaint everything
1584                Mutex::Autolock _l(mStateLock);
1585                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1586                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1587                signalEvent();
1588                return NO_ERROR;
1589            }
1590            case 1005:{ // force transaction
1591                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1592                return NO_ERROR;
1593            }
1594            case 1006:{ // enable/disable GraphicLog
1595                int enabled = data.readInt32();
1596                GraphicLog::getInstance().setEnabled(enabled);
1597                return NO_ERROR;
1598            }
1599            case 1007: // set mFreezeCount
1600                mFreezeCount = data.readInt32();
1601                mFreezeDisplayTime = 0;
1602                return NO_ERROR;
1603            case 1010:  // interrogate.
1604                reply->writeInt32(0);
1605                reply->writeInt32(0);
1606                reply->writeInt32(mDebugRegion);
1607                reply->writeInt32(mDebugBackground);
1608                return NO_ERROR;
1609            case 1013: {
1610                Mutex::Autolock _l(mStateLock);
1611                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1612                reply->writeInt32(hw.getPageFlipCount());
1613            }
1614            return NO_ERROR;
1615        }
1616    }
1617    return err;
1618}
1619
1620// ---------------------------------------------------------------------------
1621
1622sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
1623{
1624    sp<Layer> result;
1625    Mutex::Autolock _l(mStateLock);
1626    result = mLayerMap.valueFor( sur->asBinder() ).promote();
1627    return result;
1628}
1629
1630// ---------------------------------------------------------------------------
1631
1632Client::Client(const sp<SurfaceFlinger>& flinger)
1633    : mFlinger(flinger), mNameGenerator(1)
1634{
1635}
1636
1637Client::~Client()
1638{
1639    const size_t count = mLayers.size();
1640    for (size_t i=0 ; i<count ; i++) {
1641        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
1642        if (layer != 0) {
1643            mFlinger->removeLayer(layer);
1644        }
1645    }
1646}
1647
1648status_t Client::initCheck() const {
1649    return NO_ERROR;
1650}
1651
1652ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
1653{
1654    int32_t name = android_atomic_inc(&mNameGenerator);
1655    mLayers.add(name, layer);
1656    return name;
1657}
1658
1659void Client::detachLayer(const LayerBaseClient* layer)
1660{
1661    // we do a linear search here, because this doesn't happen often
1662    const size_t count = mLayers.size();
1663    for (size_t i=0 ; i<count ; i++) {
1664        if (mLayers.valueAt(i) == layer) {
1665            mLayers.removeItemsAt(i, 1);
1666            break;
1667        }
1668    }
1669}
1670sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
1671    sp<LayerBaseClient> lbc;
1672    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
1673    if (layer != 0) {
1674        lbc = layer.promote();
1675        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
1676    }
1677    return lbc;
1678}
1679
1680sp<IMemoryHeap> Client::getControlBlock() const {
1681    return 0;
1682}
1683ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
1684    return -1;
1685}
1686sp<ISurface> Client::createSurface(
1687        ISurfaceComposerClient::surface_data_t* params, int pid,
1688        const String8& name,
1689        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
1690        uint32_t flags)
1691{
1692    return mFlinger->createSurface(this, pid, name, params,
1693            display, w, h, format, flags);
1694}
1695status_t Client::destroySurface(SurfaceID sid) {
1696    return mFlinger->removeSurface(this, sid);
1697}
1698status_t Client::setState(int32_t count, const layer_state_t* states) {
1699    return mFlinger->setClientState(this, count, states);
1700}
1701
1702// ---------------------------------------------------------------------------
1703
1704UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
1705    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
1706{
1707    const int pgsize = getpagesize();
1708    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
1709
1710    mCblkHeap = new MemoryHeapBase(cblksize, 0,
1711            "SurfaceFlinger Client control-block");
1712
1713    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
1714    if (ctrlblk) { // construct the shared structure in-place.
1715        new(ctrlblk) SharedClient;
1716    }
1717}
1718
1719UserClient::~UserClient()
1720{
1721    if (ctrlblk) {
1722        ctrlblk->~SharedClient();  // destroy our shared-structure.
1723    }
1724
1725    /*
1726     * When a UserClient dies, it's unclear what to do exactly.
1727     * We could go ahead and destroy all surfaces linked to that client
1728     * however, it wouldn't be fair to the main Client
1729     * (usually the the window-manager), which might want to re-target
1730     * the layer to another UserClient.
1731     * I think the best is to do nothing, or not much; in most cases the
1732     * WM itself will go ahead and clean things up when it detects a client of
1733     * his has died.
1734     * The remaining question is what to display? currently we keep
1735     * just keep the current buffer.
1736     */
1737}
1738
1739status_t UserClient::initCheck() const {
1740    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
1741}
1742
1743void UserClient::detachLayer(const Layer* layer)
1744{
1745    int32_t name = layer->getToken();
1746    if (name >= 0) {
1747        int32_t mask = 1LU<<name;
1748        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
1749            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
1750        }
1751    }
1752}
1753
1754sp<IMemoryHeap> UserClient::getControlBlock() const {
1755    return mCblkHeap;
1756}
1757
1758ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
1759{
1760    int32_t name = NAME_NOT_FOUND;
1761    sp<Layer> layer(mFlinger->getLayer(sur));
1762    if (layer == 0) {
1763        return name;
1764    }
1765
1766    // if this layer already has a token, just return it
1767    name = layer->getToken();
1768    if ((name >= 0) && (layer->getClient() == this)) {
1769        return name;
1770    }
1771
1772    name = 0;
1773    do {
1774        int32_t mask = 1LU<<name;
1775        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
1776            // we found and locked that name
1777            status_t err = layer->setToken(
1778                    const_cast<UserClient*>(this), ctrlblk, name);
1779            if (err != NO_ERROR) {
1780                // free the name
1781                android_atomic_and(~mask, &mBitmap);
1782                name = err;
1783            }
1784            break;
1785        }
1786        if (++name > 31)
1787            name = NO_MEMORY;
1788    } while(name >= 0);
1789
1790    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
1791    //        sur->asBinder().get(), name, this, mBitmap);
1792    return name;
1793}
1794
1795sp<ISurface> UserClient::createSurface(
1796        ISurfaceComposerClient::surface_data_t* params, int pid,
1797        const String8& name,
1798        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
1799        uint32_t flags) {
1800    return 0;
1801}
1802status_t UserClient::destroySurface(SurfaceID sid) {
1803    return INVALID_OPERATION;
1804}
1805status_t UserClient::setState(int32_t count, const layer_state_t* states) {
1806    return INVALID_OPERATION;
1807}
1808
1809// ---------------------------------------------------------------------------
1810
1811GraphicPlane::GraphicPlane()
1812    : mHw(0)
1813{
1814}
1815
1816GraphicPlane::~GraphicPlane() {
1817    delete mHw;
1818}
1819
1820bool GraphicPlane::initialized() const {
1821    return mHw ? true : false;
1822}
1823
1824int GraphicPlane::getWidth() const {
1825    return mWidth;
1826}
1827
1828int GraphicPlane::getHeight() const {
1829    return mHeight;
1830}
1831
1832void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
1833{
1834    mHw = hw;
1835
1836    // initialize the display orientation transform.
1837    // it's a constant that should come from the display driver.
1838    int displayOrientation = ISurfaceComposer::eOrientationDefault;
1839    char property[PROPERTY_VALUE_MAX];
1840    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
1841        //displayOrientation
1842        switch (atoi(property)) {
1843        case 90:
1844            displayOrientation = ISurfaceComposer::eOrientation90;
1845            break;
1846        case 270:
1847            displayOrientation = ISurfaceComposer::eOrientation270;
1848            break;
1849        }
1850    }
1851
1852    const float w = hw->getWidth();
1853    const float h = hw->getHeight();
1854    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
1855            &mDisplayTransform);
1856    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
1857        mDisplayWidth = h;
1858        mDisplayHeight = w;
1859    } else {
1860        mDisplayWidth = w;
1861        mDisplayHeight = h;
1862    }
1863
1864    setOrientation(ISurfaceComposer::eOrientationDefault);
1865}
1866
1867status_t GraphicPlane::orientationToTransfrom(
1868        int orientation, int w, int h, Transform* tr)
1869{
1870    uint32_t flags = 0;
1871    switch (orientation) {
1872    case ISurfaceComposer::eOrientationDefault:
1873        flags = Transform::ROT_0;
1874        break;
1875    case ISurfaceComposer::eOrientation90:
1876        flags = Transform::ROT_90;
1877        break;
1878    case ISurfaceComposer::eOrientation180:
1879        flags = Transform::ROT_180;
1880        break;
1881    case ISurfaceComposer::eOrientation270:
1882        flags = Transform::ROT_270;
1883        break;
1884    default:
1885        return BAD_VALUE;
1886    }
1887    tr->set(flags, w, h);
1888    return NO_ERROR;
1889}
1890
1891status_t GraphicPlane::setOrientation(int orientation)
1892{
1893    // If the rotation can be handled in hardware, this is where
1894    // the magic should happen.
1895
1896    const DisplayHardware& hw(displayHardware());
1897    const float w = mDisplayWidth;
1898    const float h = mDisplayHeight;
1899    mWidth = int(w);
1900    mHeight = int(h);
1901
1902    Transform orientationTransform;
1903    GraphicPlane::orientationToTransfrom(orientation, w, h,
1904            &orientationTransform);
1905    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
1906        mWidth = int(h);
1907        mHeight = int(w);
1908    }
1909
1910    mOrientation = orientation;
1911    mGlobalTransform = mDisplayTransform * orientationTransform;
1912    return NO_ERROR;
1913}
1914
1915const DisplayHardware& GraphicPlane::displayHardware() const {
1916    return *mHw;
1917}
1918
1919const Transform& GraphicPlane::transform() const {
1920    return mGlobalTransform;
1921}
1922
1923EGLDisplay GraphicPlane::getEGLDisplay() const {
1924    return mHw->getEGLDisplay();
1925}
1926
1927// ---------------------------------------------------------------------------
1928
1929}; // namespace android
1930