SurfaceFlinger.cpp revision 48b888aab9fdcfba250722dffbdffe61f11c64f3 
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 "LayerDim.h"
51#include "SurfaceFlinger.h"
52
53#include "DisplayHardware/DisplayHardware.h"
54#include "DisplayHardware/HWComposer.h"
55
56/* ideally AID_GRAPHICS would be in a semi-public header
57 * or there would be a way to map a user/group name to its id
58 */
59#ifndef AID_GRAPHICS
60#define AID_GRAPHICS 1003
61#endif
62
63#define DISPLAY_COUNT       1
64
65namespace android {
66// ---------------------------------------------------------------------------
67
68SurfaceFlinger::SurfaceFlinger()
69    :   BnSurfaceComposer(), Thread(false),
70        mTransactionFlags(0),
71        mTransactionCount(0),
72        mResizeTransationPending(false),
73        mLayersRemoved(false),
74        mBootTime(systemTime()),
75        mHardwareTest("android.permission.HARDWARE_TEST"),
76        mAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER"),
77        mReadFramebuffer("android.permission.READ_FRAME_BUFFER"),
78        mDump("android.permission.DUMP"),
79        mVisibleRegionsDirty(false),
80        mHwWorkListDirty(false),
81        mDeferReleaseConsole(false),
82        mFreezeDisplay(false),
83        mElectronBeamAnimationMode(0),
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
120sp<IMemoryHeap> SurfaceFlinger::getCblk() const
121{
122    return mServerHeap;
123}
124
125sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
126{
127    sp<ISurfaceComposerClient> bclient;
128    sp<Client> client(new Client(this));
129    status_t err = client->initCheck();
130    if (err == NO_ERROR) {
131        bclient = client;
132    }
133    return bclient;
134}
135
136sp<ISurfaceComposerClient> SurfaceFlinger::createClientConnection()
137{
138    sp<ISurfaceComposerClient> bclient;
139    sp<UserClient> client(new UserClient(this));
140    status_t err = client->initCheck();
141    if (err == NO_ERROR) {
142        bclient = client;
143    }
144    return bclient;
145}
146
147sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
148{
149    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
150    return gba;
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        hw.compositionComplete();
404        unlockClients();
405        usleep(16667); // 60 fps period
406    }
407    return true;
408}
409
410void SurfaceFlinger::postFramebuffer()
411{
412    if (!mInvalidRegion.isEmpty()) {
413        const DisplayHardware& hw(graphicPlane(0).displayHardware());
414        const nsecs_t now = systemTime();
415        mDebugInSwapBuffers = now;
416        hw.flip(mInvalidRegion);
417        mLastSwapBufferTime = systemTime() - now;
418        mDebugInSwapBuffers = 0;
419        mInvalidRegion.clear();
420    }
421}
422
423void SurfaceFlinger::handleConsoleEvents()
424{
425    // something to do with the console
426    const DisplayHardware& hw = graphicPlane(0).displayHardware();
427
428    int what = android_atomic_and(0, &mConsoleSignals);
429    if (what & eConsoleAcquired) {
430        hw.acquireScreen();
431        // this is a temporary work-around, eventually this should be called
432        // by the power-manager
433        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
434    }
435
436    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
437        // We got the release signal before the acquire signal
438        mDeferReleaseConsole = false;
439        hw.releaseScreen();
440    }
441
442    if (what & eConsoleReleased) {
443        if (hw.isScreenAcquired()) {
444            hw.releaseScreen();
445        } else {
446            mDeferReleaseConsole = true;
447        }
448    }
449
450    mDirtyRegion.set(hw.bounds());
451}
452
453void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
454{
455    Vector< sp<LayerBase> > ditchedLayers;
456
457    /*
458     * Perform and commit the transaction
459     */
460
461    { // scope for the lock
462        Mutex::Autolock _l(mStateLock);
463        const nsecs_t now = systemTime();
464        mDebugInTransaction = now;
465        handleTransactionLocked(transactionFlags, ditchedLayers);
466        mLastTransactionTime = systemTime() - now;
467        mDebugInTransaction = 0;
468        invalidateHwcGeometry();
469        // here the transaction has been committed
470    }
471
472    /*
473     * Clean-up all layers that went away
474     * (do this without the lock held)
475     */
476
477    const size_t count = ditchedLayers.size();
478    for (size_t i=0 ; i<count ; i++) {
479        if (ditchedLayers[i] != 0) {
480            //LOGD("ditching layer %p", ditchedLayers[i].get());
481            ditchedLayers[i]->ditch();
482        }
483    }
484}
485
486void SurfaceFlinger::handleTransactionLocked(
487        uint32_t transactionFlags, Vector< sp<LayerBase> >& ditchedLayers)
488{
489    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
490    const size_t count = currentLayers.size();
491
492    /*
493     * Traversal of the children
494     * (perform the transaction for each of them if needed)
495     */
496
497    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
498    if (layersNeedTransaction) {
499        for (size_t i=0 ; i<count ; i++) {
500            const sp<LayerBase>& layer = currentLayers[i];
501            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
502            if (!trFlags) continue;
503
504            const uint32_t flags = layer->doTransaction(0);
505            if (flags & Layer::eVisibleRegion)
506                mVisibleRegionsDirty = true;
507        }
508    }
509
510    /*
511     * Perform our own transaction if needed
512     */
513
514    if (transactionFlags & eTransactionNeeded) {
515        if (mCurrentState.orientation != mDrawingState.orientation) {
516            // the orientation has changed, recompute all visible regions
517            // and invalidate everything.
518
519            const int dpy = 0;
520            const int orientation = mCurrentState.orientation;
521            const uint32_t type = mCurrentState.orientationType;
522            GraphicPlane& plane(graphicPlane(dpy));
523            plane.setOrientation(orientation);
524
525            // update the shared control block
526            const DisplayHardware& hw(plane.displayHardware());
527            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
528            dcblk->orientation = orientation;
529            dcblk->w = plane.getWidth();
530            dcblk->h = plane.getHeight();
531
532            mVisibleRegionsDirty = true;
533            mDirtyRegion.set(hw.bounds());
534        }
535
536        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
537            // freezing or unfreezing the display -> trigger animation if needed
538            mFreezeDisplay = mCurrentState.freezeDisplay;
539            if (mFreezeDisplay)
540                 mFreezeDisplayTime = 0;
541        }
542
543        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
544            // layers have been added
545            mVisibleRegionsDirty = true;
546        }
547
548        // some layers might have been removed, so
549        // we need to update the regions they're exposing.
550        if (mLayersRemoved) {
551            mLayersRemoved = false;
552            mVisibleRegionsDirty = true;
553            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
554            const size_t count = previousLayers.size();
555            for (size_t i=0 ; i<count ; i++) {
556                const sp<LayerBase>& layer(previousLayers[i]);
557                if (currentLayers.indexOf( layer ) < 0) {
558                    // this layer is not visible anymore
559                    ditchedLayers.add(layer);
560                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
561                }
562            }
563        }
564    }
565
566    commitTransaction();
567}
568
569sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
570{
571    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
572}
573
574void SurfaceFlinger::computeVisibleRegions(
575    LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
576{
577    const GraphicPlane& plane(graphicPlane(0));
578    const Transform& planeTransform(plane.transform());
579    const DisplayHardware& hw(plane.displayHardware());
580    const Region screenRegion(hw.bounds());
581
582    Region aboveOpaqueLayers;
583    Region aboveCoveredLayers;
584    Region dirty;
585
586    bool secureFrameBuffer = false;
587
588    size_t i = currentLayers.size();
589    while (i--) {
590        const sp<LayerBase>& layer = currentLayers[i];
591        layer->validateVisibility(planeTransform);
592
593        // start with the whole surface at its current location
594        const Layer::State& s(layer->drawingState());
595
596        /*
597         * opaqueRegion: area of a surface that is fully opaque.
598         */
599        Region opaqueRegion;
600
601        /*
602         * visibleRegion: area of a surface that is visible on screen
603         * and not fully transparent. This is essentially the layer's
604         * footprint minus the opaque regions above it.
605         * Areas covered by a translucent surface are considered visible.
606         */
607        Region visibleRegion;
608
609        /*
610         * coveredRegion: area of a surface that is covered by all
611         * visible regions above it (which includes the translucent areas).
612         */
613        Region coveredRegion;
614
615
616        // handle hidden surfaces by setting the visible region to empty
617        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
618            const bool translucent = layer->needsBlending();
619            const Rect bounds(layer->visibleBounds());
620            visibleRegion.set(bounds);
621            visibleRegion.andSelf(screenRegion);
622            if (!visibleRegion.isEmpty()) {
623                // Remove the transparent area from the visible region
624                if (translucent) {
625                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
626                }
627
628                // compute the opaque region
629                const int32_t layerOrientation = layer->getOrientation();
630                if (s.alpha==255 && !translucent &&
631                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
632                    // the opaque region is the layer's footprint
633                    opaqueRegion = visibleRegion;
634                }
635            }
636        }
637
638        // Clip the covered region to the visible region
639        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
640
641        // Update aboveCoveredLayers for next (lower) layer
642        aboveCoveredLayers.orSelf(visibleRegion);
643
644        // subtract the opaque region covered by the layers above us
645        visibleRegion.subtractSelf(aboveOpaqueLayers);
646
647        // compute this layer's dirty region
648        if (layer->contentDirty) {
649            // we need to invalidate the whole region
650            dirty = visibleRegion;
651            // as well, as the old visible region
652            dirty.orSelf(layer->visibleRegionScreen);
653            layer->contentDirty = false;
654        } else {
655            /* compute the exposed region:
656             *   the exposed region consists of two components:
657             *   1) what's VISIBLE now and was COVERED before
658             *   2) what's EXPOSED now less what was EXPOSED before
659             *
660             * note that (1) is conservative, we start with the whole
661             * visible region but only keep what used to be covered by
662             * something -- which mean it may have been exposed.
663             *
664             * (2) handles areas that were not covered by anything but got
665             * exposed because of a resize.
666             */
667            const Region newExposed = visibleRegion - coveredRegion;
668            const Region oldVisibleRegion = layer->visibleRegionScreen;
669            const Region oldCoveredRegion = layer->coveredRegionScreen;
670            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
671            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
672        }
673        dirty.subtractSelf(aboveOpaqueLayers);
674
675        // accumulate to the screen dirty region
676        dirtyRegion.orSelf(dirty);
677
678        // Update aboveOpaqueLayers for next (lower) layer
679        aboveOpaqueLayers.orSelf(opaqueRegion);
680
681        // Store the visible region is screen space
682        layer->setVisibleRegion(visibleRegion);
683        layer->setCoveredRegion(coveredRegion);
684
685        // If a secure layer is partially visible, lock-down the screen!
686        if (layer->isSecure() && !visibleRegion.isEmpty()) {
687            secureFrameBuffer = true;
688        }
689    }
690
691    // invalidate the areas where a layer was removed
692    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
693    mDirtyRegionRemovedLayer.clear();
694
695    mSecureFrameBuffer = secureFrameBuffer;
696    opaqueRegion = aboveOpaqueLayers;
697}
698
699
700void SurfaceFlinger::commitTransaction()
701{
702    mDrawingState = mCurrentState;
703    mResizeTransationPending = false;
704    mTransactionCV.broadcast();
705}
706
707void SurfaceFlinger::handlePageFlip()
708{
709    bool visibleRegions = mVisibleRegionsDirty;
710    LayerVector& currentLayers(
711            const_cast<LayerVector&>(mDrawingState.layersSortedByZ));
712    visibleRegions |= lockPageFlip(currentLayers);
713
714        const DisplayHardware& hw = graphicPlane(0).displayHardware();
715        const Region screenRegion(hw.bounds());
716        if (visibleRegions) {
717            Region opaqueRegion;
718            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
719
720            /*
721             *  rebuild the visible layer list
722             */
723            mVisibleLayersSortedByZ.clear();
724            const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
725            size_t count = currentLayers.size();
726            mVisibleLayersSortedByZ.setCapacity(count);
727            for (size_t i=0 ; i<count ; i++) {
728                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
729                    mVisibleLayersSortedByZ.add(currentLayers[i]);
730            }
731
732            mWormholeRegion = screenRegion.subtract(opaqueRegion);
733            mVisibleRegionsDirty = false;
734            invalidateHwcGeometry();
735        }
736
737    unlockPageFlip(currentLayers);
738    mDirtyRegion.andSelf(screenRegion);
739}
740
741void SurfaceFlinger::invalidateHwcGeometry()
742{
743    mHwWorkListDirty = true;
744}
745
746bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
747{
748    bool recomputeVisibleRegions = false;
749    size_t count = currentLayers.size();
750    sp<LayerBase> const* layers = currentLayers.array();
751    for (size_t i=0 ; i<count ; i++) {
752        const sp<LayerBase>& layer(layers[i]);
753        layer->lockPageFlip(recomputeVisibleRegions);
754    }
755    return recomputeVisibleRegions;
756}
757
758void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
759{
760    const GraphicPlane& plane(graphicPlane(0));
761    const Transform& planeTransform(plane.transform());
762    size_t count = currentLayers.size();
763    sp<LayerBase> const* layers = currentLayers.array();
764    for (size_t i=0 ; i<count ; i++) {
765        const sp<LayerBase>& layer(layers[i]);
766        layer->unlockPageFlip(planeTransform, mDirtyRegion);
767    }
768}
769
770void SurfaceFlinger::handleWorkList()
771{
772    mHwWorkListDirty = false;
773    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
774    if (hwc.initCheck() == NO_ERROR) {
775        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
776        const size_t count = currentLayers.size();
777        hwc.createWorkList(count);
778        hwc_layer_t* const cur(hwc.getLayers());
779        for (size_t i=0 ; cur && i<count ; i++) {
780            currentLayers[i]->setGeometry(&cur[i]);
781            if (mDebugDisableHWC) {
782                cur[i].compositionType = HWC_FRAMEBUFFER;
783                cur[i].flags |= HWC_SKIP_LAYER;
784            }
785        }
786    }
787}
788
789void SurfaceFlinger::handleRepaint()
790{
791    // compute the invalid region
792    mInvalidRegion.orSelf(mDirtyRegion);
793
794    if (UNLIKELY(mDebugRegion)) {
795        debugFlashRegions();
796    }
797
798    // set the frame buffer
799    const DisplayHardware& hw(graphicPlane(0).displayHardware());
800    glMatrixMode(GL_MODELVIEW);
801    glLoadIdentity();
802
803    uint32_t flags = hw.getFlags();
804    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
805        (flags & DisplayHardware::BUFFER_PRESERVED))
806    {
807        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
808        // takes a rectangle, we must make sure to update that whole
809        // rectangle in that case
810        if (flags & DisplayHardware::SWAP_RECTANGLE) {
811            // TODO: we really should be able to pass a region to
812            // SWAP_RECTANGLE so that we don't have to redraw all this.
813            mDirtyRegion.set(mInvalidRegion.bounds());
814        } else {
815            // in the BUFFER_PRESERVED case, obviously, we can update only
816            // what's needed and nothing more.
817            // NOTE: this is NOT a common case, as preserving the backbuffer
818            // is costly and usually involves copying the whole update back.
819        }
820    } else {
821        if (flags & DisplayHardware::PARTIAL_UPDATES) {
822            // We need to redraw the rectangle that will be updated
823            // (pushed to the framebuffer).
824            // This is needed because PARTIAL_UPDATES only takes one
825            // rectangle instead of a region (see DisplayHardware::flip())
826            mDirtyRegion.set(mInvalidRegion.bounds());
827        } else {
828            // we need to redraw everything (the whole screen)
829            mDirtyRegion.set(hw.bounds());
830            mInvalidRegion = mDirtyRegion;
831        }
832    }
833
834    // compose all surfaces
835    composeSurfaces(mDirtyRegion);
836
837    // clear the dirty regions
838    mDirtyRegion.clear();
839}
840
841void SurfaceFlinger::composeSurfaces(const Region& dirty)
842{
843    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
844        // should never happen unless the window manager has a bug
845        // draw something...
846        drawWormhole();
847    }
848
849    status_t err = NO_ERROR;
850    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
851    size_t count = layers.size();
852
853    const DisplayHardware& hw(graphicPlane(0).displayHardware());
854    HWComposer& hwc(hw.getHwComposer());
855    hwc_layer_t* const cur(hwc.getLayers());
856
857    LOGE_IF(cur && hwc.getNumLayers() != count,
858            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
859            hwc.getNumLayers(), count);
860
861    // just to be extra-safe, use the smallest count
862    if (hwc.initCheck() == NO_ERROR) {
863        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
864    }
865
866    /*
867     *  update the per-frame h/w composer data for each layer
868     *  and build the transparent region of the FB
869     */
870    Region transparent;
871    if (cur) {
872        for (size_t i=0 ; i<count ; i++) {
873            const sp<LayerBase>& layer(layers[i]);
874            layer->setPerFrameData(&cur[i]);
875            if (cur[i].hints & HWC_HINT_CLEAR_FB) {
876                if (!(layer->needsBlending())) {
877                    transparent.orSelf(layer->visibleRegionScreen);
878                }
879            }
880        }
881        err = hwc.prepare();
882        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
883    }
884
885    /*
886     *  clear the area of the FB that need to be transparent
887     */
888    transparent.andSelf(dirty);
889    if (!transparent.isEmpty()) {
890        glClearColor(0,0,0,0);
891        Region::const_iterator it = transparent.begin();
892        Region::const_iterator const end = transparent.end();
893        const int32_t height = hw.getHeight();
894        while (it != end) {
895            const Rect& r(*it++);
896            const GLint sy = height - (r.top + r.height());
897            glScissor(r.left, sy, r.width(), r.height());
898            glClear(GL_COLOR_BUFFER_BIT);
899        }
900    }
901
902
903    /*
904     * and then, render the layers targeted at the framebuffer
905     */
906    for (size_t i=0 ; i<count ; i++) {
907        if (cur) {
908            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
909                !(cur[i].flags & HWC_SKIP_LAYER)) {
910                // skip layers handled by the HAL
911                continue;
912            }
913        }
914
915        const sp<LayerBase>& layer(layers[i]);
916        const Region clip(dirty.intersect(layer->visibleRegionScreen));
917        if (!clip.isEmpty()) {
918            layer->draw(clip);
919        }
920    }
921}
922
923void SurfaceFlinger::unlockClients()
924{
925    const LayerVector& drawingLayers(mDrawingState.layersSortedByZ);
926    const size_t count = drawingLayers.size();
927    sp<LayerBase> const* const layers = drawingLayers.array();
928    for (size_t i=0 ; i<count ; ++i) {
929        const sp<LayerBase>& layer = layers[i];
930        layer->finishPageFlip();
931    }
932}
933
934void SurfaceFlinger::debugFlashRegions()
935{
936    const DisplayHardware& hw(graphicPlane(0).displayHardware());
937    const uint32_t flags = hw.getFlags();
938
939    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
940            (flags & DisplayHardware::BUFFER_PRESERVED))) {
941        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
942                mDirtyRegion.bounds() : hw.bounds());
943        composeSurfaces(repaint);
944    }
945
946    TextureManager::deactivateTextures();
947
948    glDisable(GL_BLEND);
949    glDisable(GL_DITHER);
950    glDisable(GL_SCISSOR_TEST);
951
952    static int toggle = 0;
953    toggle = 1 - toggle;
954    if (toggle) {
955        glColor4f(1, 0, 1, 1);
956    } else {
957        glColor4f(1, 1, 0, 1);
958    }
959
960    Region::const_iterator it = mDirtyRegion.begin();
961    Region::const_iterator const end = mDirtyRegion.end();
962    while (it != end) {
963        const Rect& r = *it++;
964        GLfloat vertices[][2] = {
965                { r.left,  r.top },
966                { r.left,  r.bottom },
967                { r.right, r.bottom },
968                { r.right, r.top }
969        };
970        glVertexPointer(2, GL_FLOAT, 0, vertices);
971        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
972    }
973
974    if (mInvalidRegion.isEmpty()) {
975        mDirtyRegion.dump("mDirtyRegion");
976        mInvalidRegion.dump("mInvalidRegion");
977    }
978    hw.flip(mInvalidRegion);
979
980    if (mDebugRegion > 1)
981        usleep(mDebugRegion * 1000);
982
983    glEnable(GL_SCISSOR_TEST);
984    //mDirtyRegion.dump("mDirtyRegion");
985}
986
987void SurfaceFlinger::drawWormhole() const
988{
989    const Region region(mWormholeRegion.intersect(mDirtyRegion));
990    if (region.isEmpty())
991        return;
992
993    const DisplayHardware& hw(graphicPlane(0).displayHardware());
994    const int32_t width = hw.getWidth();
995    const int32_t height = hw.getHeight();
996
997    glDisable(GL_BLEND);
998    glDisable(GL_DITHER);
999
1000    if (LIKELY(!mDebugBackground)) {
1001        glClearColor(0,0,0,0);
1002        Region::const_iterator it = region.begin();
1003        Region::const_iterator const end = region.end();
1004        while (it != end) {
1005            const Rect& r = *it++;
1006            const GLint sy = height - (r.top + r.height());
1007            glScissor(r.left, sy, r.width(), r.height());
1008            glClear(GL_COLOR_BUFFER_BIT);
1009        }
1010    } else {
1011        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1012                { width, height }, { 0, height }  };
1013        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1014        glVertexPointer(2, GL_SHORT, 0, vertices);
1015        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1016        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1017#if defined(GL_OES_EGL_image_external)
1018        if (GLExtensions::getInstance().haveTextureExternal()) {
1019            glDisable(GL_TEXTURE_EXTERNAL_OES);
1020        }
1021#endif
1022        glEnable(GL_TEXTURE_2D);
1023        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1024        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1025        glMatrixMode(GL_TEXTURE);
1026        glLoadIdentity();
1027        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1028        Region::const_iterator it = region.begin();
1029        Region::const_iterator const end = region.end();
1030        while (it != end) {
1031            const Rect& r = *it++;
1032            const GLint sy = height - (r.top + r.height());
1033            glScissor(r.left, sy, r.width(), r.height());
1034            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1035        }
1036        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1037        glLoadIdentity();
1038        glMatrixMode(GL_MODELVIEW);
1039    }
1040}
1041
1042void SurfaceFlinger::debugShowFPS() const
1043{
1044    static int mFrameCount;
1045    static int mLastFrameCount = 0;
1046    static nsecs_t mLastFpsTime = 0;
1047    static float mFps = 0;
1048    mFrameCount++;
1049    nsecs_t now = systemTime();
1050    nsecs_t diff = now - mLastFpsTime;
1051    if (diff > ms2ns(250)) {
1052        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1053        mLastFpsTime = now;
1054        mLastFrameCount = mFrameCount;
1055    }
1056    // XXX: mFPS has the value we want
1057 }
1058
1059status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1060{
1061    Mutex::Autolock _l(mStateLock);
1062    addLayer_l(layer);
1063    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1064    return NO_ERROR;
1065}
1066
1067status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1068{
1069    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1070    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1071}
1072
1073ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1074        const sp<LayerBaseClient>& lbc)
1075{
1076    Mutex::Autolock _l(mStateLock);
1077
1078    // attach this layer to the client
1079    ssize_t name = client->attachLayer(lbc);
1080
1081    // add this layer to the current state list
1082    addLayer_l(lbc);
1083
1084    return name;
1085}
1086
1087status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1088{
1089    Mutex::Autolock _l(mStateLock);
1090    status_t err = purgatorizeLayer_l(layer);
1091    if (err == NO_ERROR)
1092        setTransactionFlags(eTransactionNeeded);
1093    return err;
1094}
1095
1096status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1097{
1098    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1099    if (lbc != 0) {
1100        mLayerMap.removeItem( lbc->getSurface()->asBinder() );
1101    }
1102    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1103    if (index >= 0) {
1104        mLayersRemoved = true;
1105        return NO_ERROR;
1106    }
1107    return status_t(index);
1108}
1109
1110status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1111{
1112    // First add the layer to the purgatory list, which makes sure it won't
1113    // go away, then remove it from the main list (through a transaction).
1114    ssize_t err = removeLayer_l(layerBase);
1115    if (err >= 0) {
1116        mLayerPurgatory.add(layerBase);
1117    }
1118
1119    layerBase->onRemoved();
1120
1121    // it's possible that we don't find a layer, because it might
1122    // have been destroyed already -- this is not technically an error
1123    // from the user because there is a race between Client::destroySurface(),
1124    // ~Client() and ~ISurface().
1125    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1126}
1127
1128status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1129{
1130    layer->forceVisibilityTransaction();
1131    setTransactionFlags(eTraversalNeeded);
1132    return NO_ERROR;
1133}
1134
1135uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1136{
1137    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1138}
1139
1140uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1141{
1142    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1143    if ((old & flags)==0) { // wake the server up
1144        signalEvent();
1145    }
1146    return old;
1147}
1148
1149void SurfaceFlinger::openGlobalTransaction()
1150{
1151    android_atomic_inc(&mTransactionCount);
1152}
1153
1154void SurfaceFlinger::closeGlobalTransaction()
1155{
1156    if (android_atomic_dec(&mTransactionCount) == 1) {
1157        signalEvent();
1158
1159        // if there is a transaction with a resize, wait for it to
1160        // take effect before returning.
1161        Mutex::Autolock _l(mStateLock);
1162        while (mResizeTransationPending) {
1163            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1164            if (CC_UNLIKELY(err != NO_ERROR)) {
1165                // just in case something goes wrong in SF, return to the
1166                // called after a few seconds.
1167                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1168                mResizeTransationPending = false;
1169                break;
1170            }
1171        }
1172    }
1173}
1174
1175status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1176{
1177    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1178        return BAD_VALUE;
1179
1180    Mutex::Autolock _l(mStateLock);
1181    mCurrentState.freezeDisplay = 1;
1182    setTransactionFlags(eTransactionNeeded);
1183
1184    // flags is intended to communicate some sort of animation behavior
1185    // (for instance fading)
1186    return NO_ERROR;
1187}
1188
1189status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1190{
1191    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1192        return BAD_VALUE;
1193
1194    Mutex::Autolock _l(mStateLock);
1195    mCurrentState.freezeDisplay = 0;
1196    setTransactionFlags(eTransactionNeeded);
1197
1198    // flags is intended to communicate some sort of animation behavior
1199    // (for instance fading)
1200    return NO_ERROR;
1201}
1202
1203int SurfaceFlinger::setOrientation(DisplayID dpy,
1204        int orientation, uint32_t flags)
1205{
1206    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1207        return BAD_VALUE;
1208
1209    Mutex::Autolock _l(mStateLock);
1210    if (mCurrentState.orientation != orientation) {
1211        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1212            mCurrentState.orientationType = flags;
1213            mCurrentState.orientation = orientation;
1214            setTransactionFlags(eTransactionNeeded);
1215            mTransactionCV.wait(mStateLock);
1216        } else {
1217            orientation = BAD_VALUE;
1218        }
1219    }
1220    return orientation;
1221}
1222
1223sp<ISurface> SurfaceFlinger::createSurface(const sp<Client>& client, int pid,
1224        const String8& name, ISurfaceComposerClient::surface_data_t* params,
1225        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1226        uint32_t flags)
1227{
1228    sp<LayerBaseClient> layer;
1229    sp<LayerBaseClient::Surface> surfaceHandle;
1230
1231    if (int32_t(w|h) < 0) {
1232        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1233                int(w), int(h));
1234        return surfaceHandle;
1235    }
1236
1237    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1238    sp<Layer> normalLayer;
1239    switch (flags & eFXSurfaceMask) {
1240        case eFXSurfaceNormal:
1241            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1242            layer = normalLayer;
1243            break;
1244        case eFXSurfaceBlur:
1245            // for now we treat Blur as Dim, until we can implement it
1246            // efficiently.
1247        case eFXSurfaceDim:
1248            layer = createDimSurface(client, d, w, h, flags);
1249            break;
1250    }
1251
1252    if (layer != 0) {
1253        layer->initStates(w, h, flags);
1254        layer->setName(name);
1255        ssize_t token = addClientLayer(client, layer);
1256
1257        surfaceHandle = layer->getSurface();
1258        if (surfaceHandle != 0) {
1259            params->token = token;
1260            params->identity = surfaceHandle->getIdentity();
1261            params->width = w;
1262            params->height = h;
1263            params->format = format;
1264            if (normalLayer != 0) {
1265                Mutex::Autolock _l(mStateLock);
1266                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1267            }
1268        }
1269
1270        setTransactionFlags(eTransactionNeeded);
1271    }
1272
1273    return surfaceHandle;
1274}
1275
1276sp<Layer> SurfaceFlinger::createNormalSurface(
1277        const sp<Client>& client, DisplayID display,
1278        uint32_t w, uint32_t h, uint32_t flags,
1279        PixelFormat& format)
1280{
1281    // initialize the surfaces
1282    switch (format) { // TODO: take h/w into account
1283    case PIXEL_FORMAT_TRANSPARENT:
1284    case PIXEL_FORMAT_TRANSLUCENT:
1285        format = PIXEL_FORMAT_RGBA_8888;
1286        break;
1287    case PIXEL_FORMAT_OPAQUE:
1288#ifdef NO_RGBX_8888
1289        format = PIXEL_FORMAT_RGB_565;
1290#else
1291        format = PIXEL_FORMAT_RGBX_8888;
1292#endif
1293        break;
1294    }
1295
1296#ifdef NO_RGBX_8888
1297    if (format == PIXEL_FORMAT_RGBX_8888)
1298        format = PIXEL_FORMAT_RGBA_8888;
1299#endif
1300
1301    sp<Layer> layer = new Layer(this, display, client);
1302    status_t err = layer->setBuffers(w, h, format, flags);
1303    if (LIKELY(err != NO_ERROR)) {
1304        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1305        layer.clear();
1306    }
1307    return layer;
1308}
1309
1310sp<LayerDim> SurfaceFlinger::createDimSurface(
1311        const sp<Client>& client, DisplayID display,
1312        uint32_t w, uint32_t h, uint32_t flags)
1313{
1314    sp<LayerDim> layer = new LayerDim(this, display, client);
1315    layer->initStates(w, h, flags);
1316    return layer;
1317}
1318
1319status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1320{
1321    /*
1322     * called by the window manager, when a surface should be marked for
1323     * destruction.
1324     *
1325     * The surface is removed from the current and drawing lists, but placed
1326     * in the purgatory queue, so it's not destroyed right-away (we need
1327     * to wait for all client's references to go away first).
1328     */
1329
1330    status_t err = NAME_NOT_FOUND;
1331    Mutex::Autolock _l(mStateLock);
1332    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1333    if (layer != 0) {
1334        err = purgatorizeLayer_l(layer);
1335        if (err == NO_ERROR) {
1336            setTransactionFlags(eTransactionNeeded);
1337        }
1338    }
1339    return err;
1340}
1341
1342status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1343{
1344    // called by ~ISurface() when all references are gone
1345
1346    class MessageDestroySurface : public MessageBase {
1347        SurfaceFlinger* flinger;
1348        sp<LayerBaseClient> layer;
1349    public:
1350        MessageDestroySurface(
1351                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1352            : flinger(flinger), layer(layer) { }
1353        virtual bool handler() {
1354            sp<LayerBaseClient> l(layer);
1355            layer.clear(); // clear it outside of the lock;
1356            Mutex::Autolock _l(flinger->mStateLock);
1357            /*
1358             * remove the layer from the current list -- chances are that it's
1359             * not in the list anyway, because it should have been removed
1360             * already upon request of the client (eg: window manager).
1361             * However, a buggy client could have not done that.
1362             * Since we know we don't have any more clients, we don't need
1363             * to use the purgatory.
1364             */
1365            status_t err = flinger->removeLayer_l(l);
1366            if (err == NAME_NOT_FOUND) {
1367                // The surface wasn't in the current list, which means it was
1368                // removed already, which means it is in the purgatory,
1369                // and need to be removed from there.
1370                // This needs to happen from the main thread since its dtor
1371                // must run from there (b/c of OpenGL ES). Additionally, we
1372                // can't really acquire our internal lock from
1373                // destroySurface() -- see postMessage() below.
1374                ssize_t idx = flinger->mLayerPurgatory.remove(l);
1375                LOGE_IF(idx < 0,
1376                        "layer=%p is not in the purgatory list", l.get());
1377            }
1378
1379            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1380                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1381            return true;
1382        }
1383    };
1384
1385    postMessageAsync( new MessageDestroySurface(this, layer) );
1386    return NO_ERROR;
1387}
1388
1389status_t SurfaceFlinger::setClientState(
1390        const sp<Client>& client,
1391        int32_t count,
1392        const layer_state_t* states)
1393{
1394    Mutex::Autolock _l(mStateLock);
1395    uint32_t flags = 0;
1396    for (int i=0 ; i<count ; i++) {
1397        const layer_state_t& s(states[i]);
1398        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1399        if (layer != 0) {
1400            const uint32_t what = s.what;
1401            if (what & ePositionChanged) {
1402                if (layer->setPosition(s.x, s.y))
1403                    flags |= eTraversalNeeded;
1404            }
1405            if (what & eLayerChanged) {
1406                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1407                if (layer->setLayer(s.z)) {
1408                    mCurrentState.layersSortedByZ.removeAt(idx);
1409                    mCurrentState.layersSortedByZ.add(layer);
1410                    // we need traversal (state changed)
1411                    // AND transaction (list changed)
1412                    flags |= eTransactionNeeded|eTraversalNeeded;
1413                }
1414            }
1415            if (what & eSizeChanged) {
1416                if (layer->setSize(s.w, s.h)) {
1417                    flags |= eTraversalNeeded;
1418                    mResizeTransationPending = true;
1419                }
1420            }
1421            if (what & eAlphaChanged) {
1422                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1423                    flags |= eTraversalNeeded;
1424            }
1425            if (what & eMatrixChanged) {
1426                if (layer->setMatrix(s.matrix))
1427                    flags |= eTraversalNeeded;
1428            }
1429            if (what & eTransparentRegionChanged) {
1430                if (layer->setTransparentRegionHint(s.transparentRegion))
1431                    flags |= eTraversalNeeded;
1432            }
1433            if (what & eVisibilityChanged) {
1434                if (layer->setFlags(s.flags, s.mask))
1435                    flags |= eTraversalNeeded;
1436            }
1437        }
1438    }
1439    if (flags) {
1440        setTransactionFlags(flags);
1441    }
1442    return NO_ERROR;
1443}
1444
1445void SurfaceFlinger::screenReleased(int dpy)
1446{
1447    // this may be called by a signal handler, we can't do too much in here
1448    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1449    signalEvent();
1450}
1451
1452void SurfaceFlinger::screenAcquired(int dpy)
1453{
1454    // this may be called by a signal handler, we can't do too much in here
1455    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1456    signalEvent();
1457}
1458
1459status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1460{
1461    const size_t SIZE = 4096;
1462    char buffer[SIZE];
1463    String8 result;
1464    if (!mDump.checkCalling()) {
1465        snprintf(buffer, SIZE, "Permission Denial: "
1466                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1467                IPCThreadState::self()->getCallingPid(),
1468                IPCThreadState::self()->getCallingUid());
1469        result.append(buffer);
1470    } else {
1471
1472        // figure out if we're stuck somewhere
1473        const nsecs_t now = systemTime();
1474        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1475        const nsecs_t inTransaction(mDebugInTransaction);
1476        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1477        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1478
1479        // Try to get the main lock, but don't insist if we can't
1480        // (this would indicate SF is stuck, but we want to be able to
1481        // print something in dumpsys).
1482        int retry = 3;
1483        while (mStateLock.tryLock()<0 && --retry>=0) {
1484            usleep(1000000);
1485        }
1486        const bool locked(retry >= 0);
1487        if (!locked) {
1488            snprintf(buffer, SIZE,
1489                    "SurfaceFlinger appears to be unresponsive, "
1490                    "dumping anyways (no locks held)\n");
1491            result.append(buffer);
1492        }
1493
1494        /*
1495         * Dump the visible layer list
1496         */
1497        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1498        const size_t count = currentLayers.size();
1499        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1500        result.append(buffer);
1501        for (size_t i=0 ; i<count ; i++) {
1502            const sp<LayerBase>& layer(currentLayers[i]);
1503            layer->dump(result, buffer, SIZE);
1504            const Layer::State& s(layer->drawingState());
1505            s.transparentRegion.dump(result, "transparentRegion");
1506            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1507            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1508        }
1509
1510        /*
1511         * Dump the layers in the purgatory
1512         */
1513
1514        const size_t purgatorySize =  mLayerPurgatory.size();
1515        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1516        result.append(buffer);
1517        for (size_t i=0 ; i<purgatorySize ; i++) {
1518            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1519            layer->shortDump(result, buffer, SIZE);
1520        }
1521
1522        /*
1523         * Dump SurfaceFlinger global state
1524         */
1525
1526        snprintf(buffer, SIZE, "SurfaceFlinger global state\n");
1527        result.append(buffer);
1528        mWormholeRegion.dump(result, "WormholeRegion");
1529        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1530        snprintf(buffer, SIZE,
1531                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1532                mFreezeDisplay?"yes":"no", mFreezeCount,
1533                mCurrentState.orientation, hw.canDraw());
1534        result.append(buffer);
1535        snprintf(buffer, SIZE,
1536                "  last eglSwapBuffers() time: %f us\n"
1537                "  last transaction time     : %f us\n",
1538                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1539        result.append(buffer);
1540
1541        if (inSwapBuffersDuration || !locked) {
1542            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1543                    inSwapBuffersDuration/1000.0);
1544            result.append(buffer);
1545        }
1546
1547        if (inTransactionDuration || !locked) {
1548            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1549                    inTransactionDuration/1000.0);
1550            result.append(buffer);
1551        }
1552
1553        /*
1554         * Dump HWComposer state
1555         */
1556        HWComposer& hwc(hw.getHwComposer());
1557        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1558                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1559                mDebugDisableHWC ? "disabled" : "enabled");
1560        result.append(buffer);
1561        hwc.dump(result, buffer, SIZE);
1562
1563        /*
1564         * Dump gralloc state
1565         */
1566        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1567        alloc.dump(result);
1568        hw.dump(result);
1569
1570        if (locked) {
1571            mStateLock.unlock();
1572        }
1573    }
1574    write(fd, result.string(), result.size());
1575    return NO_ERROR;
1576}
1577
1578status_t SurfaceFlinger::onTransact(
1579    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1580{
1581    switch (code) {
1582        case CREATE_CONNECTION:
1583        case OPEN_GLOBAL_TRANSACTION:
1584        case CLOSE_GLOBAL_TRANSACTION:
1585        case SET_ORIENTATION:
1586        case FREEZE_DISPLAY:
1587        case UNFREEZE_DISPLAY:
1588        case BOOT_FINISHED:
1589        case TURN_ELECTRON_BEAM_OFF:
1590        case TURN_ELECTRON_BEAM_ON:
1591        {
1592            // codes that require permission check
1593            IPCThreadState* ipc = IPCThreadState::self();
1594            const int pid = ipc->getCallingPid();
1595            const int uid = ipc->getCallingUid();
1596            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1597                LOGE("Permission Denial: "
1598                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1599                return PERMISSION_DENIED;
1600            }
1601            break;
1602        }
1603        case CAPTURE_SCREEN:
1604        {
1605            // codes that require permission check
1606            IPCThreadState* ipc = IPCThreadState::self();
1607            const int pid = ipc->getCallingPid();
1608            const int uid = ipc->getCallingUid();
1609            if ((uid != AID_GRAPHICS) && !mReadFramebuffer.check(pid, uid)) {
1610                LOGE("Permission Denial: "
1611                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1612                return PERMISSION_DENIED;
1613            }
1614            break;
1615        }
1616    }
1617
1618    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1619    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1620        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1621        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1622            IPCThreadState* ipc = IPCThreadState::self();
1623            const int pid = ipc->getCallingPid();
1624            const int uid = ipc->getCallingUid();
1625            LOGE("Permission Denial: "
1626                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1627            return PERMISSION_DENIED;
1628        }
1629        int n;
1630        switch (code) {
1631            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1632            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1633                return NO_ERROR;
1634            case 1002:  // SHOW_UPDATES
1635                n = data.readInt32();
1636                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1637                return NO_ERROR;
1638            case 1003:  // SHOW_BACKGROUND
1639                n = data.readInt32();
1640                mDebugBackground = n ? 1 : 0;
1641                return NO_ERROR;
1642            case 1008:  // toggle use of hw composer
1643                n = data.readInt32();
1644                mDebugDisableHWC = n ? 1 : 0;
1645                invalidateHwcGeometry();
1646                // fall-through...
1647            case 1004:{ // repaint everything
1648                Mutex::Autolock _l(mStateLock);
1649                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1650                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1651                signalEvent();
1652                return NO_ERROR;
1653            }
1654            case 1005:{ // force transaction
1655                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1656                return NO_ERROR;
1657            }
1658            case 1006:{ // enable/disable GraphicLog
1659                int enabled = data.readInt32();
1660                GraphicLog::getInstance().setEnabled(enabled);
1661                return NO_ERROR;
1662            }
1663            case 1007: // set mFreezeCount
1664                mFreezeCount = data.readInt32();
1665                mFreezeDisplayTime = 0;
1666                return NO_ERROR;
1667            case 1010:  // interrogate.
1668                reply->writeInt32(0);
1669                reply->writeInt32(0);
1670                reply->writeInt32(mDebugRegion);
1671                reply->writeInt32(mDebugBackground);
1672                return NO_ERROR;
1673            case 1013: {
1674                Mutex::Autolock _l(mStateLock);
1675                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1676                reply->writeInt32(hw.getPageFlipCount());
1677            }
1678            return NO_ERROR;
1679        }
1680    }
1681    return err;
1682}
1683
1684// ---------------------------------------------------------------------------
1685
1686status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1687        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1688{
1689    if (!GLExtensions::getInstance().haveFramebufferObject())
1690        return INVALID_OPERATION;
1691
1692    // get screen geometry
1693    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1694    const uint32_t hw_w = hw.getWidth();
1695    const uint32_t hw_h = hw.getHeight();
1696    GLfloat u = 1;
1697    GLfloat v = 1;
1698
1699    // make sure to clear all GL error flags
1700    while ( glGetError() != GL_NO_ERROR ) ;
1701
1702    // create a FBO
1703    GLuint name, tname;
1704    glGenTextures(1, &tname);
1705    glBindTexture(GL_TEXTURE_2D, tname);
1706    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1707            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1708    if (glGetError() != GL_NO_ERROR) {
1709        while ( glGetError() != GL_NO_ERROR ) ;
1710        GLint tw = (2 << (31 - clz(hw_w)));
1711        GLint th = (2 << (31 - clz(hw_h)));
1712        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1713                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1714        u = GLfloat(hw_w) / tw;
1715        v = GLfloat(hw_h) / th;
1716    }
1717    glGenFramebuffersOES(1, &name);
1718    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1719    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1720            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1721
1722    // redraw the screen entirely...
1723    glClearColor(0,0,0,1);
1724    glClear(GL_COLOR_BUFFER_BIT);
1725    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1726    const size_t count = layers.size();
1727    for (size_t i=0 ; i<count ; ++i) {
1728        const sp<LayerBase>& layer(layers[i]);
1729        layer->drawForSreenShot();
1730    }
1731
1732    // back to main framebuffer
1733    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1734    glDisable(GL_SCISSOR_TEST);
1735    glDeleteFramebuffersOES(1, &name);
1736
1737    *textureName = tname;
1738    *uOut = u;
1739    *vOut = v;
1740    return NO_ERROR;
1741}
1742
1743// ---------------------------------------------------------------------------
1744
1745status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1746{
1747    status_t result = PERMISSION_DENIED;
1748
1749    if (!GLExtensions::getInstance().haveFramebufferObject())
1750        return INVALID_OPERATION;
1751
1752    // get screen geometry
1753    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1754    const uint32_t hw_w = hw.getWidth();
1755    const uint32_t hw_h = hw.getHeight();
1756    const Region screenBounds(hw.bounds());
1757
1758    GLfloat u, v;
1759    GLuint tname;
1760    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1761    if (result != NO_ERROR) {
1762        return result;
1763    }
1764
1765    GLfloat vtx[8];
1766    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1767    glEnable(GL_TEXTURE_2D);
1768    glBindTexture(GL_TEXTURE_2D, tname);
1769    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1770    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1771    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1772    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1773    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1774    glVertexPointer(2, GL_FLOAT, 0, vtx);
1775
1776    class s_curve_interpolator {
1777        const float nbFrames, s, v;
1778    public:
1779        s_curve_interpolator(int nbFrames, float s)
1780        : nbFrames(1.0f / (nbFrames-1)), s(s),
1781          v(1.0f + expf(-s + 0.5f*s)) {
1782        }
1783        float operator()(int f) {
1784            const float x = f * nbFrames;
1785            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1786        }
1787    };
1788
1789    class v_stretch {
1790        const GLfloat hw_w, hw_h;
1791    public:
1792        v_stretch(uint32_t hw_w, uint32_t hw_h)
1793        : hw_w(hw_w), hw_h(hw_h) {
1794        }
1795        void operator()(GLfloat* vtx, float v) {
1796            const GLfloat w = hw_w + (hw_w * v);
1797            const GLfloat h = hw_h - (hw_h * v);
1798            const GLfloat x = (hw_w - w) * 0.5f;
1799            const GLfloat y = (hw_h - h) * 0.5f;
1800            vtx[0] = x;         vtx[1] = y;
1801            vtx[2] = x;         vtx[3] = y + h;
1802            vtx[4] = x + w;     vtx[5] = y + h;
1803            vtx[6] = x + w;     vtx[7] = y;
1804        }
1805    };
1806
1807    class h_stretch {
1808        const GLfloat hw_w, hw_h;
1809    public:
1810        h_stretch(uint32_t hw_w, uint32_t hw_h)
1811        : hw_w(hw_w), hw_h(hw_h) {
1812        }
1813        void operator()(GLfloat* vtx, float v) {
1814            const GLfloat w = hw_w - (hw_w * v);
1815            const GLfloat h = 1.0f;
1816            const GLfloat x = (hw_w - w) * 0.5f;
1817            const GLfloat y = (hw_h - h) * 0.5f;
1818            vtx[0] = x;         vtx[1] = y;
1819            vtx[2] = x;         vtx[3] = y + h;
1820            vtx[4] = x + w;     vtx[5] = y + h;
1821            vtx[6] = x + w;     vtx[7] = y;
1822        }
1823    };
1824
1825    // the full animation is 24 frames
1826    const int nbFrames = 12;
1827    s_curve_interpolator itr(nbFrames, 7.5f);
1828    s_curve_interpolator itg(nbFrames, 8.0f);
1829    s_curve_interpolator itb(nbFrames, 8.5f);
1830
1831    v_stretch vverts(hw_w, hw_h);
1832    glEnable(GL_BLEND);
1833    glBlendFunc(GL_ONE, GL_ONE);
1834    for (int i=0 ; i<nbFrames ; i++) {
1835        float x, y, w, h;
1836        const float vr = itr(i);
1837        const float vg = itg(i);
1838        const float vb = itb(i);
1839
1840        // clear screen
1841        glColorMask(1,1,1,1);
1842        glClear(GL_COLOR_BUFFER_BIT);
1843        glEnable(GL_TEXTURE_2D);
1844
1845        // draw the red plane
1846        vverts(vtx, vr);
1847        glColorMask(1,0,0,1);
1848        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1849
1850        // draw the green plane
1851        vverts(vtx, vg);
1852        glColorMask(0,1,0,1);
1853        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1854
1855        // draw the blue plane
1856        vverts(vtx, vb);
1857        glColorMask(0,0,1,1);
1858        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1859
1860        // draw the white highlight (we use the last vertices)
1861        glDisable(GL_TEXTURE_2D);
1862        glColorMask(1,1,1,1);
1863        glColor4f(vg, vg, vg, 1);
1864        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1865        hw.flip(screenBounds);
1866    }
1867
1868    h_stretch hverts(hw_w, hw_h);
1869    glDisable(GL_BLEND);
1870    glDisable(GL_TEXTURE_2D);
1871    glColorMask(1,1,1,1);
1872    for (int i=0 ; i<nbFrames ; i++) {
1873        const float v = itg(i);
1874        hverts(vtx, v);
1875        glClear(GL_COLOR_BUFFER_BIT);
1876        glColor4f(1-v, 1-v, 1-v, 1);
1877        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1878        hw.flip(screenBounds);
1879    }
1880
1881    glColorMask(1,1,1,1);
1882    glEnable(GL_SCISSOR_TEST);
1883    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1884    glDeleteTextures(1, &tname);
1885    return NO_ERROR;
1886}
1887
1888status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1889{
1890    status_t result = PERMISSION_DENIED;
1891
1892    if (!GLExtensions::getInstance().haveFramebufferObject())
1893        return INVALID_OPERATION;
1894
1895
1896    // get screen geometry
1897    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1898    const uint32_t hw_w = hw.getWidth();
1899    const uint32_t hw_h = hw.getHeight();
1900    const Region screenBounds(hw.bounds());
1901
1902    GLfloat u, v;
1903    GLuint tname;
1904    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1905    if (result != NO_ERROR) {
1906        return result;
1907    }
1908
1909    // back to main framebuffer
1910    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1911    glDisable(GL_SCISSOR_TEST);
1912
1913    GLfloat vtx[8];
1914    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1915    glEnable(GL_TEXTURE_2D);
1916    glBindTexture(GL_TEXTURE_2D, tname);
1917    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1918    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1919    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1920    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1921    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1922    glVertexPointer(2, GL_FLOAT, 0, vtx);
1923
1924    class s_curve_interpolator {
1925        const float nbFrames, s, v;
1926    public:
1927        s_curve_interpolator(int nbFrames, float s)
1928        : nbFrames(1.0f / (nbFrames-1)), s(s),
1929          v(1.0f + expf(-s + 0.5f*s)) {
1930        }
1931        float operator()(int f) {
1932            const float x = f * nbFrames;
1933            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1934        }
1935    };
1936
1937    class v_stretch {
1938        const GLfloat hw_w, hw_h;
1939    public:
1940        v_stretch(uint32_t hw_w, uint32_t hw_h)
1941        : hw_w(hw_w), hw_h(hw_h) {
1942        }
1943        void operator()(GLfloat* vtx, float v) {
1944            const GLfloat w = hw_w + (hw_w * v);
1945            const GLfloat h = hw_h - (hw_h * v);
1946            const GLfloat x = (hw_w - w) * 0.5f;
1947            const GLfloat y = (hw_h - h) * 0.5f;
1948            vtx[0] = x;         vtx[1] = y;
1949            vtx[2] = x;         vtx[3] = y + h;
1950            vtx[4] = x + w;     vtx[5] = y + h;
1951            vtx[6] = x + w;     vtx[7] = y;
1952        }
1953    };
1954
1955    class h_stretch {
1956        const GLfloat hw_w, hw_h;
1957    public:
1958        h_stretch(uint32_t hw_w, uint32_t hw_h)
1959        : hw_w(hw_w), hw_h(hw_h) {
1960        }
1961        void operator()(GLfloat* vtx, float v) {
1962            const GLfloat w = hw_w - (hw_w * v);
1963            const GLfloat h = 1.0f;
1964            const GLfloat x = (hw_w - w) * 0.5f;
1965            const GLfloat y = (hw_h - h) * 0.5f;
1966            vtx[0] = x;         vtx[1] = y;
1967            vtx[2] = x;         vtx[3] = y + h;
1968            vtx[4] = x + w;     vtx[5] = y + h;
1969            vtx[6] = x + w;     vtx[7] = y;
1970        }
1971    };
1972
1973    // the full animation is 12 frames
1974    int nbFrames = 8;
1975    s_curve_interpolator itr(nbFrames, 7.5f);
1976    s_curve_interpolator itg(nbFrames, 8.0f);
1977    s_curve_interpolator itb(nbFrames, 8.5f);
1978
1979    h_stretch hverts(hw_w, hw_h);
1980    glDisable(GL_BLEND);
1981    glDisable(GL_TEXTURE_2D);
1982    glColorMask(1,1,1,1);
1983    for (int i=nbFrames-1 ; i>=0 ; i--) {
1984        const float v = itg(i);
1985        hverts(vtx, v);
1986        glClear(GL_COLOR_BUFFER_BIT);
1987        glColor4f(1-v, 1-v, 1-v, 1);
1988        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1989        hw.flip(screenBounds);
1990    }
1991
1992    nbFrames = 4;
1993    v_stretch vverts(hw_w, hw_h);
1994    glEnable(GL_BLEND);
1995    glBlendFunc(GL_ONE, GL_ONE);
1996    for (int i=nbFrames-1 ; i>=0 ; i--) {
1997        float x, y, w, h;
1998        const float vr = itr(i);
1999        const float vg = itg(i);
2000        const float vb = itb(i);
2001
2002        // clear screen
2003        glColorMask(1,1,1,1);
2004        glClear(GL_COLOR_BUFFER_BIT);
2005        glEnable(GL_TEXTURE_2D);
2006
2007        // draw the red plane
2008        vverts(vtx, vr);
2009        glColorMask(1,0,0,1);
2010        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2011
2012        // draw the green plane
2013        vverts(vtx, vg);
2014        glColorMask(0,1,0,1);
2015        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2016
2017        // draw the blue plane
2018        vverts(vtx, vb);
2019        glColorMask(0,0,1,1);
2020        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2021
2022        hw.flip(screenBounds);
2023    }
2024
2025    glColorMask(1,1,1,1);
2026    glEnable(GL_SCISSOR_TEST);
2027    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2028    glDeleteTextures(1, &tname);
2029
2030    return NO_ERROR;
2031}
2032
2033// ---------------------------------------------------------------------------
2034
2035status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2036{
2037    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2038    if (!hw.canDraw()) {
2039        // we're already off
2040        return NO_ERROR;
2041    }
2042    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2043        electronBeamOffAnimationImplLocked();
2044    }
2045
2046    // always clear the whole screen at the end of the animation
2047    glClearColor(0,0,0,1);
2048    glDisable(GL_SCISSOR_TEST);
2049    glClear(GL_COLOR_BUFFER_BIT);
2050    glEnable(GL_SCISSOR_TEST);
2051    hw.flip( Region(hw.bounds()) );
2052
2053    hw.setCanDraw(false);
2054    return NO_ERROR;
2055}
2056
2057status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2058{
2059    class MessageTurnElectronBeamOff : public MessageBase {
2060        SurfaceFlinger* flinger;
2061        int32_t mode;
2062        status_t result;
2063    public:
2064        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2065            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2066        }
2067        status_t getResult() const {
2068            return result;
2069        }
2070        virtual bool handler() {
2071            Mutex::Autolock _l(flinger->mStateLock);
2072            result = flinger->turnElectronBeamOffImplLocked(mode);
2073            return true;
2074        }
2075    };
2076
2077    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2078    status_t res = postMessageSync(msg);
2079    if (res == NO_ERROR) {
2080        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2081
2082        // work-around: when the power-manager calls us we activate the
2083        // animation. eventually, the "on" animation will be called
2084        // by the power-manager itself
2085        mElectronBeamAnimationMode = mode;
2086    }
2087    return res;
2088}
2089
2090// ---------------------------------------------------------------------------
2091
2092status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2093{
2094    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2095    if (hw.canDraw()) {
2096        // we're already on
2097        return NO_ERROR;
2098    }
2099    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2100        electronBeamOnAnimationImplLocked();
2101    }
2102    hw.setCanDraw(true);
2103
2104    // make sure to redraw the whole screen when the animation is done
2105    mDirtyRegion.set(hw.bounds());
2106    signalEvent();
2107
2108    return NO_ERROR;
2109}
2110
2111status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2112{
2113    class MessageTurnElectronBeamOn : public MessageBase {
2114        SurfaceFlinger* flinger;
2115        int32_t mode;
2116        status_t result;
2117    public:
2118        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2119            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2120        }
2121        status_t getResult() const {
2122            return result;
2123        }
2124        virtual bool handler() {
2125            Mutex::Autolock _l(flinger->mStateLock);
2126            result = flinger->turnElectronBeamOnImplLocked(mode);
2127            return true;
2128        }
2129    };
2130
2131    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2132    return NO_ERROR;
2133}
2134
2135// ---------------------------------------------------------------------------
2136
2137status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2138        sp<IMemoryHeap>* heap,
2139        uint32_t* w, uint32_t* h, PixelFormat* f,
2140        uint32_t sw, uint32_t sh,
2141        uint32_t minLayerZ, uint32_t maxLayerZ)
2142{
2143    status_t result = PERMISSION_DENIED;
2144
2145    // only one display supported for now
2146    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2147        return BAD_VALUE;
2148
2149    if (!GLExtensions::getInstance().haveFramebufferObject())
2150        return INVALID_OPERATION;
2151
2152    // get screen geometry
2153    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2154    const uint32_t hw_w = hw.getWidth();
2155    const uint32_t hw_h = hw.getHeight();
2156
2157    if ((sw > hw_w) || (sh > hw_h))
2158        return BAD_VALUE;
2159
2160    sw = (!sw) ? hw_w : sw;
2161    sh = (!sh) ? hw_h : sh;
2162    const size_t size = sw * sh * 4;
2163
2164    LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2165            sw, sh, minLayerZ, maxLayerZ);
2166
2167    // make sure to clear all GL error flags
2168    while ( glGetError() != GL_NO_ERROR ) ;
2169
2170    // create a FBO
2171    GLuint name, tname;
2172    glGenRenderbuffersOES(1, &tname);
2173    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2174    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2175    glGenFramebuffersOES(1, &name);
2176    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2177    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2178            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2179
2180    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2181
2182    LOGD("screenshot: FBO created, status=0x%x", status);
2183
2184    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2185
2186        // invert everything, b/c glReadPixel() below will invert the FB
2187        glViewport(0, 0, sw, sh);
2188        glScissor(0, 0, sw, sh);
2189        glMatrixMode(GL_PROJECTION);
2190        glPushMatrix();
2191        glLoadIdentity();
2192        glOrthof(0, hw_w, 0, hw_h, 0, 1);
2193        glMatrixMode(GL_MODELVIEW);
2194
2195        // redraw the screen entirely...
2196        glClearColor(0,0,0,1);
2197        glClear(GL_COLOR_BUFFER_BIT);
2198
2199        LOGD("screenshot: glClear() issued");
2200
2201        const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2202        const size_t count = layers.size();
2203        for (size_t i=0 ; i<count ; ++i) {
2204            const sp<LayerBase>& layer(layers[i]);
2205            const uint32_t z = layer->drawingState().z;
2206            if (z >= minLayerZ && z <= maxLayerZ) {
2207                layer->drawForSreenShot();
2208            }
2209        }
2210
2211        LOGD("screenshot: All layers rendered");
2212
2213        // XXX: this is needed on tegra
2214        glScissor(0, 0, sw, sh);
2215
2216        // check for errors and return screen capture
2217        if (glGetError() != GL_NO_ERROR) {
2218            // error while rendering
2219            result = INVALID_OPERATION;
2220        } else {
2221            // allocate shared memory large enough to hold the
2222            // screen capture
2223            sp<MemoryHeapBase> base(
2224                    new MemoryHeapBase(size, 0, "screen-capture") );
2225            void* const ptr = base->getBase();
2226            if (ptr) {
2227
2228                LOGD("screenshot: about to call glReadPixels(0,0,%d,%d,...,%p)",
2229                        sw, sh, ptr);
2230
2231                // capture the screen with glReadPixels()
2232                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2233                if (glGetError() == GL_NO_ERROR) {
2234                    *heap = base;
2235                    *w = sw;
2236                    *h = sh;
2237                    *f = PIXEL_FORMAT_RGBA_8888;
2238                    result = NO_ERROR;
2239                }
2240            } else {
2241                result = NO_MEMORY;
2242            }
2243
2244            LOGD("screenshot: glReadPixels() returned %s", strerror(result));
2245
2246        }
2247        glEnable(GL_SCISSOR_TEST);
2248        glViewport(0, 0, hw_w, hw_h);
2249        glMatrixMode(GL_PROJECTION);
2250        glPopMatrix();
2251        glMatrixMode(GL_MODELVIEW);
2252    } else {
2253        result = BAD_VALUE;
2254    }
2255
2256    LOGD("screenshot: about to release FBO resources");
2257
2258    // release FBO resources
2259    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2260    glDeleteRenderbuffersOES(1, &tname);
2261    glDeleteFramebuffersOES(1, &name);
2262
2263    LOGD("screenshot: about to call compositionComplete()");
2264
2265    hw.compositionComplete();
2266
2267    LOGD("screenshot: result = %s", strerror(result));
2268
2269    return result;
2270}
2271
2272
2273status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2274        sp<IMemoryHeap>* heap,
2275        uint32_t* width, uint32_t* height, PixelFormat* format,
2276        uint32_t sw, uint32_t sh,
2277        uint32_t minLayerZ, uint32_t maxLayerZ)
2278{
2279    // only one display supported for now
2280    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2281        return BAD_VALUE;
2282
2283    if (!GLExtensions::getInstance().haveFramebufferObject())
2284        return INVALID_OPERATION;
2285
2286    class MessageCaptureScreen : public MessageBase {
2287        SurfaceFlinger* flinger;
2288        DisplayID dpy;
2289        sp<IMemoryHeap>* heap;
2290        uint32_t* w;
2291        uint32_t* h;
2292        PixelFormat* f;
2293        uint32_t sw;
2294        uint32_t sh;
2295        uint32_t minLayerZ;
2296        uint32_t maxLayerZ;
2297        status_t result;
2298    public:
2299        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2300                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2301                uint32_t sw, uint32_t sh,
2302                uint32_t minLayerZ, uint32_t maxLayerZ)
2303            : flinger(flinger), dpy(dpy),
2304              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2305              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2306              result(PERMISSION_DENIED)
2307        {
2308        }
2309        status_t getResult() const {
2310            return result;
2311        }
2312        virtual bool handler() {
2313            Mutex::Autolock _l(flinger->mStateLock);
2314
2315            // if we have secure windows, never allow the screen capture
2316            if (flinger->mSecureFrameBuffer)
2317                return true;
2318
2319            result = flinger->captureScreenImplLocked(dpy,
2320                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2321
2322            return true;
2323        }
2324    };
2325
2326    sp<MessageBase> msg = new MessageCaptureScreen(this,
2327            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2328    status_t res = postMessageSync(msg);
2329    if (res == NO_ERROR) {
2330        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2331    }
2332    return res;
2333}
2334
2335// ---------------------------------------------------------------------------
2336
2337sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2338{
2339    sp<Layer> result;
2340    Mutex::Autolock _l(mStateLock);
2341    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2342    return result;
2343}
2344
2345// ---------------------------------------------------------------------------
2346
2347Client::Client(const sp<SurfaceFlinger>& flinger)
2348    : mFlinger(flinger), mNameGenerator(1)
2349{
2350}
2351
2352Client::~Client()
2353{
2354    const size_t count = mLayers.size();
2355    for (size_t i=0 ; i<count ; i++) {
2356        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2357        if (layer != 0) {
2358            mFlinger->removeLayer(layer);
2359        }
2360    }
2361}
2362
2363status_t Client::initCheck() const {
2364    return NO_ERROR;
2365}
2366
2367ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2368{
2369    int32_t name = android_atomic_inc(&mNameGenerator);
2370    mLayers.add(name, layer);
2371    return name;
2372}
2373
2374void Client::detachLayer(const LayerBaseClient* layer)
2375{
2376    // we do a linear search here, because this doesn't happen often
2377    const size_t count = mLayers.size();
2378    for (size_t i=0 ; i<count ; i++) {
2379        if (mLayers.valueAt(i) == layer) {
2380            mLayers.removeItemsAt(i, 1);
2381            break;
2382        }
2383    }
2384}
2385sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
2386    sp<LayerBaseClient> lbc;
2387    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
2388    if (layer != 0) {
2389        lbc = layer.promote();
2390        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2391    }
2392    return lbc;
2393}
2394
2395sp<IMemoryHeap> Client::getControlBlock() const {
2396    return 0;
2397}
2398ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
2399    return -1;
2400}
2401sp<ISurface> Client::createSurface(
2402        ISurfaceComposerClient::surface_data_t* params, int pid,
2403        const String8& name,
2404        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2405        uint32_t flags)
2406{
2407    return mFlinger->createSurface(this, pid, name, params,
2408            display, w, h, format, flags);
2409}
2410status_t Client::destroySurface(SurfaceID sid) {
2411    return mFlinger->removeSurface(this, sid);
2412}
2413status_t Client::setState(int32_t count, const layer_state_t* states) {
2414    return mFlinger->setClientState(this, count, states);
2415}
2416
2417// ---------------------------------------------------------------------------
2418
2419UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
2420    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
2421{
2422    const int pgsize = getpagesize();
2423    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
2424
2425    mCblkHeap = new MemoryHeapBase(cblksize, 0,
2426            "SurfaceFlinger Client control-block");
2427
2428    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
2429    if (ctrlblk) { // construct the shared structure in-place.
2430        new(ctrlblk) SharedClient;
2431    }
2432}
2433
2434UserClient::~UserClient()
2435{
2436    if (ctrlblk) {
2437        ctrlblk->~SharedClient();  // destroy our shared-structure.
2438    }
2439
2440    /*
2441     * When a UserClient dies, it's unclear what to do exactly.
2442     * We could go ahead and destroy all surfaces linked to that client
2443     * however, it wouldn't be fair to the main Client
2444     * (usually the the window-manager), which might want to re-target
2445     * the layer to another UserClient.
2446     * I think the best is to do nothing, or not much; in most cases the
2447     * WM itself will go ahead and clean things up when it detects a client of
2448     * his has died.
2449     * The remaining question is what to display? currently we keep
2450     * just keep the current buffer.
2451     */
2452}
2453
2454status_t UserClient::initCheck() const {
2455    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
2456}
2457
2458void UserClient::detachLayer(const Layer* layer)
2459{
2460    int32_t name = layer->getToken();
2461    if (name >= 0) {
2462        int32_t mask = 1LU<<name;
2463        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
2464            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
2465        }
2466    }
2467}
2468
2469sp<IMemoryHeap> UserClient::getControlBlock() const {
2470    return mCblkHeap;
2471}
2472
2473ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
2474{
2475    int32_t name = NAME_NOT_FOUND;
2476    sp<Layer> layer(mFlinger->getLayer(sur));
2477    if (layer == 0) {
2478        return name;
2479    }
2480
2481    // if this layer already has a token, just return it
2482    name = layer->getToken();
2483    if ((name >= 0) && (layer->getClient() == this)) {
2484        return name;
2485    }
2486
2487    name = 0;
2488    do {
2489        int32_t mask = 1LU<<name;
2490        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
2491            // we found and locked that name
2492            status_t err = layer->setToken(
2493                    const_cast<UserClient*>(this), ctrlblk, name);
2494            if (err != NO_ERROR) {
2495                // free the name
2496                android_atomic_and(~mask, &mBitmap);
2497                name = err;
2498            }
2499            break;
2500        }
2501        if (++name > 31)
2502            name = NO_MEMORY;
2503    } while(name >= 0);
2504
2505    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
2506    //        sur->asBinder().get(), name, this, mBitmap);
2507    return name;
2508}
2509
2510sp<ISurface> UserClient::createSurface(
2511        ISurfaceComposerClient::surface_data_t* params, int pid,
2512        const String8& name,
2513        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2514        uint32_t flags) {
2515    return 0;
2516}
2517status_t UserClient::destroySurface(SurfaceID sid) {
2518    return INVALID_OPERATION;
2519}
2520status_t UserClient::setState(int32_t count, const layer_state_t* states) {
2521    return INVALID_OPERATION;
2522}
2523
2524// ---------------------------------------------------------------------------
2525
2526GraphicBufferAlloc::GraphicBufferAlloc() {}
2527
2528GraphicBufferAlloc::~GraphicBufferAlloc() {}
2529
2530sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2531        PixelFormat format, uint32_t usage) {
2532    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2533    status_t err = graphicBuffer->initCheck();
2534    if (err != 0) {
2535        LOGE("createGraphicBuffer: init check failed: %d", err);
2536        return 0;
2537    } else if (graphicBuffer->handle == 0) {
2538        LOGE("createGraphicBuffer: unable to create GraphicBuffer");
2539        return 0;
2540    }
2541    Mutex::Autolock _l(mLock);
2542    mBuffers.add(graphicBuffer);
2543    return graphicBuffer;
2544}
2545
2546void GraphicBufferAlloc::freeAllGraphicBuffersExcept(int bufIdx) {
2547    Mutex::Autolock _l(mLock);
2548    if (0 <= bufIdx && bufIdx < mBuffers.size()) {
2549        sp<GraphicBuffer> b(mBuffers[bufIdx]);
2550        mBuffers.clear();
2551        mBuffers.add(b);
2552    } else {
2553        mBuffers.clear();
2554    }
2555}
2556
2557// ---------------------------------------------------------------------------
2558
2559GraphicPlane::GraphicPlane()
2560    : mHw(0)
2561{
2562}
2563
2564GraphicPlane::~GraphicPlane() {
2565    delete mHw;
2566}
2567
2568bool GraphicPlane::initialized() const {
2569    return mHw ? true : false;
2570}
2571
2572int GraphicPlane::getWidth() const {
2573    return mWidth;
2574}
2575
2576int GraphicPlane::getHeight() const {
2577    return mHeight;
2578}
2579
2580void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2581{
2582    mHw = hw;
2583
2584    // initialize the display orientation transform.
2585    // it's a constant that should come from the display driver.
2586    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2587    char property[PROPERTY_VALUE_MAX];
2588    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2589        //displayOrientation
2590        switch (atoi(property)) {
2591        case 90:
2592            displayOrientation = ISurfaceComposer::eOrientation90;
2593            break;
2594        case 270:
2595            displayOrientation = ISurfaceComposer::eOrientation270;
2596            break;
2597        }
2598    }
2599
2600    const float w = hw->getWidth();
2601    const float h = hw->getHeight();
2602    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2603            &mDisplayTransform);
2604    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2605        mDisplayWidth = h;
2606        mDisplayHeight = w;
2607    } else {
2608        mDisplayWidth = w;
2609        mDisplayHeight = h;
2610    }
2611
2612    setOrientation(ISurfaceComposer::eOrientationDefault);
2613}
2614
2615status_t GraphicPlane::orientationToTransfrom(
2616        int orientation, int w, int h, Transform* tr)
2617{
2618    uint32_t flags = 0;
2619    switch (orientation) {
2620    case ISurfaceComposer::eOrientationDefault:
2621        flags = Transform::ROT_0;
2622        break;
2623    case ISurfaceComposer::eOrientation90:
2624        flags = Transform::ROT_90;
2625        break;
2626    case ISurfaceComposer::eOrientation180:
2627        flags = Transform::ROT_180;
2628        break;
2629    case ISurfaceComposer::eOrientation270:
2630        flags = Transform::ROT_270;
2631        break;
2632    default:
2633        return BAD_VALUE;
2634    }
2635    tr->set(flags, w, h);
2636    return NO_ERROR;
2637}
2638
2639status_t GraphicPlane::setOrientation(int orientation)
2640{
2641    // If the rotation can be handled in hardware, this is where
2642    // the magic should happen.
2643
2644    const DisplayHardware& hw(displayHardware());
2645    const float w = mDisplayWidth;
2646    const float h = mDisplayHeight;
2647    mWidth = int(w);
2648    mHeight = int(h);
2649
2650    Transform orientationTransform;
2651    GraphicPlane::orientationToTransfrom(orientation, w, h,
2652            &orientationTransform);
2653    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2654        mWidth = int(h);
2655        mHeight = int(w);
2656    }
2657
2658    mOrientation = orientation;
2659    mGlobalTransform = mDisplayTransform * orientationTransform;
2660    return NO_ERROR;
2661}
2662
2663const DisplayHardware& GraphicPlane::displayHardware() const {
2664    return *mHw;
2665}
2666
2667DisplayHardware& GraphicPlane::editDisplayHardware() {
2668    return *mHw;
2669}
2670
2671const Transform& GraphicPlane::transform() const {
2672    return mGlobalTransform;
2673}
2674
2675EGLDisplay GraphicPlane::getEGLDisplay() const {
2676    return mHw->getEGLDisplay();
2677}
2678
2679// ---------------------------------------------------------------------------
2680
2681}; // namespace android
2682