SurfaceFlinger.cpp revision a9f54a77cd4057b0fddb0c6886357152548bf891 
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_REPAINT_DONE, index);
398    } else {
399        // pretend we did the post
400        hw.compositionComplete();
401        usleep(16667); // 60 fps period
402    }
403    return true;
404}
405
406void SurfaceFlinger::postFramebuffer()
407{
408    if (!mInvalidRegion.isEmpty()) {
409        const DisplayHardware& hw(graphicPlane(0).displayHardware());
410        const nsecs_t now = systemTime();
411        mDebugInSwapBuffers = now;
412        hw.flip(mInvalidRegion);
413        mLastSwapBufferTime = systemTime() - now;
414        mDebugInSwapBuffers = 0;
415        mInvalidRegion.clear();
416    }
417}
418
419void SurfaceFlinger::handleConsoleEvents()
420{
421    // something to do with the console
422    const DisplayHardware& hw = graphicPlane(0).displayHardware();
423
424    int what = android_atomic_and(0, &mConsoleSignals);
425    if (what & eConsoleAcquired) {
426        hw.acquireScreen();
427        // this is a temporary work-around, eventually this should be called
428        // by the power-manager
429        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
430    }
431
432    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
433        // We got the release signal before the acquire signal
434        mDeferReleaseConsole = false;
435        hw.releaseScreen();
436    }
437
438    if (what & eConsoleReleased) {
439        if (hw.isScreenAcquired()) {
440            hw.releaseScreen();
441        } else {
442            mDeferReleaseConsole = true;
443        }
444    }
445
446    mDirtyRegion.set(hw.bounds());
447}
448
449void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
450{
451    Vector< sp<LayerBase> > ditchedLayers;
452
453    /*
454     * Perform and commit the transaction
455     */
456
457    { // scope for the lock
458        Mutex::Autolock _l(mStateLock);
459        const nsecs_t now = systemTime();
460        mDebugInTransaction = now;
461        handleTransactionLocked(transactionFlags, ditchedLayers);
462        mLastTransactionTime = systemTime() - now;
463        mDebugInTransaction = 0;
464        invalidateHwcGeometry();
465        // here the transaction has been committed
466    }
467
468    /*
469     * Clean-up all layers that went away
470     * (do this without the lock held)
471     */
472
473    const size_t count = ditchedLayers.size();
474    for (size_t i=0 ; i<count ; i++) {
475        if (ditchedLayers[i] != 0) {
476            //LOGD("ditching layer %p", ditchedLayers[i].get());
477            ditchedLayers[i]->ditch();
478        }
479    }
480}
481
482void SurfaceFlinger::handleTransactionLocked(
483        uint32_t transactionFlags, Vector< sp<LayerBase> >& ditchedLayers)
484{
485    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
486    const size_t count = currentLayers.size();
487
488    /*
489     * Traversal of the children
490     * (perform the transaction for each of them if needed)
491     */
492
493    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
494    if (layersNeedTransaction) {
495        for (size_t i=0 ; i<count ; i++) {
496            const sp<LayerBase>& layer = currentLayers[i];
497            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
498            if (!trFlags) continue;
499
500            const uint32_t flags = layer->doTransaction(0);
501            if (flags & Layer::eVisibleRegion)
502                mVisibleRegionsDirty = true;
503        }
504    }
505
506    /*
507     * Perform our own transaction if needed
508     */
509
510    if (transactionFlags & eTransactionNeeded) {
511        if (mCurrentState.orientation != mDrawingState.orientation) {
512            // the orientation has changed, recompute all visible regions
513            // and invalidate everything.
514
515            const int dpy = 0;
516            const int orientation = mCurrentState.orientation;
517            const uint32_t type = mCurrentState.orientationType;
518            GraphicPlane& plane(graphicPlane(dpy));
519            plane.setOrientation(orientation);
520
521            // update the shared control block
522            const DisplayHardware& hw(plane.displayHardware());
523            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
524            dcblk->orientation = orientation;
525            dcblk->w = plane.getWidth();
526            dcblk->h = plane.getHeight();
527
528            mVisibleRegionsDirty = true;
529            mDirtyRegion.set(hw.bounds());
530        }
531
532        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
533            // freezing or unfreezing the display -> trigger animation if needed
534            mFreezeDisplay = mCurrentState.freezeDisplay;
535            if (mFreezeDisplay)
536                 mFreezeDisplayTime = 0;
537        }
538
539        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
540            // layers have been added
541            mVisibleRegionsDirty = true;
542        }
543
544        // some layers might have been removed, so
545        // we need to update the regions they're exposing.
546        if (mLayersRemoved) {
547            mLayersRemoved = false;
548            mVisibleRegionsDirty = true;
549            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
550            const size_t count = previousLayers.size();
551            for (size_t i=0 ; i<count ; i++) {
552                const sp<LayerBase>& layer(previousLayers[i]);
553                if (currentLayers.indexOf( layer ) < 0) {
554                    // this layer is not visible anymore
555                    ditchedLayers.add(layer);
556                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
557                }
558            }
559        }
560    }
561
562    commitTransaction();
563}
564
565sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
566{
567    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
568}
569
570void SurfaceFlinger::computeVisibleRegions(
571    LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
572{
573    const GraphicPlane& plane(graphicPlane(0));
574    const Transform& planeTransform(plane.transform());
575    const DisplayHardware& hw(plane.displayHardware());
576    const Region screenRegion(hw.bounds());
577
578    Region aboveOpaqueLayers;
579    Region aboveCoveredLayers;
580    Region dirty;
581
582    bool secureFrameBuffer = false;
583
584    size_t i = currentLayers.size();
585    while (i--) {
586        const sp<LayerBase>& layer = currentLayers[i];
587        layer->validateVisibility(planeTransform);
588
589        // start with the whole surface at its current location
590        const Layer::State& s(layer->drawingState());
591
592        /*
593         * opaqueRegion: area of a surface that is fully opaque.
594         */
595        Region opaqueRegion;
596
597        /*
598         * visibleRegion: area of a surface that is visible on screen
599         * and not fully transparent. This is essentially the layer's
600         * footprint minus the opaque regions above it.
601         * Areas covered by a translucent surface are considered visible.
602         */
603        Region visibleRegion;
604
605        /*
606         * coveredRegion: area of a surface that is covered by all
607         * visible regions above it (which includes the translucent areas).
608         */
609        Region coveredRegion;
610
611
612        // handle hidden surfaces by setting the visible region to empty
613        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
614            const bool translucent = layer->needsBlending();
615            const Rect bounds(layer->visibleBounds());
616            visibleRegion.set(bounds);
617            visibleRegion.andSelf(screenRegion);
618            if (!visibleRegion.isEmpty()) {
619                // Remove the transparent area from the visible region
620                if (translucent) {
621                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
622                }
623
624                // compute the opaque region
625                const int32_t layerOrientation = layer->getOrientation();
626                if (s.alpha==255 && !translucent &&
627                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
628                    // the opaque region is the layer's footprint
629                    opaqueRegion = visibleRegion;
630                }
631            }
632        }
633
634        // Clip the covered region to the visible region
635        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
636
637        // Update aboveCoveredLayers for next (lower) layer
638        aboveCoveredLayers.orSelf(visibleRegion);
639
640        // subtract the opaque region covered by the layers above us
641        visibleRegion.subtractSelf(aboveOpaqueLayers);
642
643        // compute this layer's dirty region
644        if (layer->contentDirty) {
645            // we need to invalidate the whole region
646            dirty = visibleRegion;
647            // as well, as the old visible region
648            dirty.orSelf(layer->visibleRegionScreen);
649            layer->contentDirty = false;
650        } else {
651            /* compute the exposed region:
652             *   the exposed region consists of two components:
653             *   1) what's VISIBLE now and was COVERED before
654             *   2) what's EXPOSED now less what was EXPOSED before
655             *
656             * note that (1) is conservative, we start with the whole
657             * visible region but only keep what used to be covered by
658             * something -- which mean it may have been exposed.
659             *
660             * (2) handles areas that were not covered by anything but got
661             * exposed because of a resize.
662             */
663            const Region newExposed = visibleRegion - coveredRegion;
664            const Region oldVisibleRegion = layer->visibleRegionScreen;
665            const Region oldCoveredRegion = layer->coveredRegionScreen;
666            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
667            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
668        }
669        dirty.subtractSelf(aboveOpaqueLayers);
670
671        // accumulate to the screen dirty region
672        dirtyRegion.orSelf(dirty);
673
674        // Update aboveOpaqueLayers for next (lower) layer
675        aboveOpaqueLayers.orSelf(opaqueRegion);
676
677        // Store the visible region is screen space
678        layer->setVisibleRegion(visibleRegion);
679        layer->setCoveredRegion(coveredRegion);
680
681        // If a secure layer is partially visible, lock-down the screen!
682        if (layer->isSecure() && !visibleRegion.isEmpty()) {
683            secureFrameBuffer = true;
684        }
685    }
686
687    // invalidate the areas where a layer was removed
688    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
689    mDirtyRegionRemovedLayer.clear();
690
691    mSecureFrameBuffer = secureFrameBuffer;
692    opaqueRegion = aboveOpaqueLayers;
693}
694
695
696void SurfaceFlinger::commitTransaction()
697{
698    mDrawingState = mCurrentState;
699    mResizeTransationPending = false;
700    mTransactionCV.broadcast();
701}
702
703void SurfaceFlinger::handlePageFlip()
704{
705    bool visibleRegions = mVisibleRegionsDirty;
706    LayerVector& currentLayers(
707            const_cast<LayerVector&>(mDrawingState.layersSortedByZ));
708    visibleRegions |= lockPageFlip(currentLayers);
709
710        const DisplayHardware& hw = graphicPlane(0).displayHardware();
711        const Region screenRegion(hw.bounds());
712        if (visibleRegions) {
713            Region opaqueRegion;
714            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
715
716            /*
717             *  rebuild the visible layer list
718             */
719            mVisibleLayersSortedByZ.clear();
720            const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
721            size_t count = currentLayers.size();
722            mVisibleLayersSortedByZ.setCapacity(count);
723            for (size_t i=0 ; i<count ; i++) {
724                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
725                    mVisibleLayersSortedByZ.add(currentLayers[i]);
726            }
727
728            mWormholeRegion = screenRegion.subtract(opaqueRegion);
729            mVisibleRegionsDirty = false;
730            invalidateHwcGeometry();
731        }
732
733    unlockPageFlip(currentLayers);
734    mDirtyRegion.andSelf(screenRegion);
735}
736
737void SurfaceFlinger::invalidateHwcGeometry()
738{
739    mHwWorkListDirty = true;
740}
741
742bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
743{
744    bool recomputeVisibleRegions = false;
745    size_t count = currentLayers.size();
746    sp<LayerBase> const* layers = currentLayers.array();
747    for (size_t i=0 ; i<count ; i++) {
748        const sp<LayerBase>& layer(layers[i]);
749        layer->lockPageFlip(recomputeVisibleRegions);
750    }
751    return recomputeVisibleRegions;
752}
753
754void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
755{
756    const GraphicPlane& plane(graphicPlane(0));
757    const Transform& planeTransform(plane.transform());
758    size_t count = currentLayers.size();
759    sp<LayerBase> const* layers = currentLayers.array();
760    for (size_t i=0 ; i<count ; i++) {
761        const sp<LayerBase>& layer(layers[i]);
762        layer->unlockPageFlip(planeTransform, mDirtyRegion);
763    }
764}
765
766void SurfaceFlinger::handleWorkList()
767{
768    mHwWorkListDirty = false;
769    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
770    if (hwc.initCheck() == NO_ERROR) {
771        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
772        const size_t count = currentLayers.size();
773        hwc.createWorkList(count);
774        hwc_layer_t* const cur(hwc.getLayers());
775        for (size_t i=0 ; cur && i<count ; i++) {
776            currentLayers[i]->setGeometry(&cur[i]);
777            if (mDebugDisableHWC) {
778                cur[i].compositionType = HWC_FRAMEBUFFER;
779                cur[i].flags |= HWC_SKIP_LAYER;
780            }
781        }
782    }
783}
784
785void SurfaceFlinger::handleRepaint()
786{
787    // compute the invalid region
788    mInvalidRegion.orSelf(mDirtyRegion);
789
790    if (UNLIKELY(mDebugRegion)) {
791        debugFlashRegions();
792    }
793
794    // set the frame buffer
795    const DisplayHardware& hw(graphicPlane(0).displayHardware());
796    glMatrixMode(GL_MODELVIEW);
797    glLoadIdentity();
798
799    uint32_t flags = hw.getFlags();
800    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
801        (flags & DisplayHardware::BUFFER_PRESERVED))
802    {
803        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
804        // takes a rectangle, we must make sure to update that whole
805        // rectangle in that case
806        if (flags & DisplayHardware::SWAP_RECTANGLE) {
807            // TODO: we really should be able to pass a region to
808            // SWAP_RECTANGLE so that we don't have to redraw all this.
809            mDirtyRegion.set(mInvalidRegion.bounds());
810        } else {
811            // in the BUFFER_PRESERVED case, obviously, we can update only
812            // what's needed and nothing more.
813            // NOTE: this is NOT a common case, as preserving the backbuffer
814            // is costly and usually involves copying the whole update back.
815        }
816    } else {
817        if (flags & DisplayHardware::PARTIAL_UPDATES) {
818            // We need to redraw the rectangle that will be updated
819            // (pushed to the framebuffer).
820            // This is needed because PARTIAL_UPDATES only takes one
821            // rectangle instead of a region (see DisplayHardware::flip())
822            mDirtyRegion.set(mInvalidRegion.bounds());
823        } else {
824            // we need to redraw everything (the whole screen)
825            mDirtyRegion.set(hw.bounds());
826            mInvalidRegion = mDirtyRegion;
827        }
828    }
829
830    // compose all surfaces
831    composeSurfaces(mDirtyRegion);
832
833    // clear the dirty regions
834    mDirtyRegion.clear();
835}
836
837void SurfaceFlinger::composeSurfaces(const Region& dirty)
838{
839    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
840        // should never happen unless the window manager has a bug
841        // draw something...
842        drawWormhole();
843    }
844
845    status_t err = NO_ERROR;
846    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
847    size_t count = layers.size();
848
849    const DisplayHardware& hw(graphicPlane(0).displayHardware());
850    HWComposer& hwc(hw.getHwComposer());
851    hwc_layer_t* const cur(hwc.getLayers());
852
853    LOGE_IF(cur && hwc.getNumLayers() != count,
854            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
855            hwc.getNumLayers(), count);
856
857    // just to be extra-safe, use the smallest count
858    if (hwc.initCheck() == NO_ERROR) {
859        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
860    }
861
862    /*
863     *  update the per-frame h/w composer data for each layer
864     *  and build the transparent region of the FB
865     */
866    Region transparent;
867    if (cur) {
868        for (size_t i=0 ; i<count ; i++) {
869            const sp<LayerBase>& layer(layers[i]);
870            layer->setPerFrameData(&cur[i]);
871        }
872        err = hwc.prepare();
873        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
874
875        if (err == NO_ERROR) {
876            for (size_t i=0 ; i<count ; i++) {
877                if (cur[i].hints & HWC_HINT_CLEAR_FB) {
878                    const sp<LayerBase>& layer(layers[i]);
879                    if (!(layer->needsBlending())) {
880                        transparent.orSelf(layer->visibleRegionScreen);
881                    }
882                }
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
905    /*
906     * and then, render the layers targeted at the framebuffer
907     */
908    for (size_t i=0 ; i<count ; i++) {
909        if (cur) {
910            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
911                !(cur[i].flags & HWC_SKIP_LAYER)) {
912                // skip layers handled by the HAL
913                continue;
914            }
915        }
916
917        const sp<LayerBase>& layer(layers[i]);
918        const Region clip(dirty.intersect(layer->visibleRegionScreen));
919        if (!clip.isEmpty()) {
920            layer->draw(clip);
921        }
922    }
923}
924
925void SurfaceFlinger::debugFlashRegions()
926{
927    const DisplayHardware& hw(graphicPlane(0).displayHardware());
928    const uint32_t flags = hw.getFlags();
929
930    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
931            (flags & DisplayHardware::BUFFER_PRESERVED))) {
932        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
933                mDirtyRegion.bounds() : hw.bounds());
934        composeSurfaces(repaint);
935    }
936
937    TextureManager::deactivateTextures();
938
939    glDisable(GL_BLEND);
940    glDisable(GL_DITHER);
941    glDisable(GL_SCISSOR_TEST);
942
943    static int toggle = 0;
944    toggle = 1 - toggle;
945    if (toggle) {
946        glColor4f(1, 0, 1, 1);
947    } else {
948        glColor4f(1, 1, 0, 1);
949    }
950
951    Region::const_iterator it = mDirtyRegion.begin();
952    Region::const_iterator const end = mDirtyRegion.end();
953    while (it != end) {
954        const Rect& r = *it++;
955        GLfloat vertices[][2] = {
956                { r.left,  r.top },
957                { r.left,  r.bottom },
958                { r.right, r.bottom },
959                { r.right, r.top }
960        };
961        glVertexPointer(2, GL_FLOAT, 0, vertices);
962        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
963    }
964
965    if (mInvalidRegion.isEmpty()) {
966        mDirtyRegion.dump("mDirtyRegion");
967        mInvalidRegion.dump("mInvalidRegion");
968    }
969    hw.flip(mInvalidRegion);
970
971    if (mDebugRegion > 1)
972        usleep(mDebugRegion * 1000);
973
974    glEnable(GL_SCISSOR_TEST);
975    //mDirtyRegion.dump("mDirtyRegion");
976}
977
978void SurfaceFlinger::drawWormhole() const
979{
980    const Region region(mWormholeRegion.intersect(mDirtyRegion));
981    if (region.isEmpty())
982        return;
983
984    const DisplayHardware& hw(graphicPlane(0).displayHardware());
985    const int32_t width = hw.getWidth();
986    const int32_t height = hw.getHeight();
987
988    glDisable(GL_BLEND);
989    glDisable(GL_DITHER);
990
991    if (LIKELY(!mDebugBackground)) {
992        glClearColor(0,0,0,0);
993        Region::const_iterator it = region.begin();
994        Region::const_iterator const end = region.end();
995        while (it != end) {
996            const Rect& r = *it++;
997            const GLint sy = height - (r.top + r.height());
998            glScissor(r.left, sy, r.width(), r.height());
999            glClear(GL_COLOR_BUFFER_BIT);
1000        }
1001    } else {
1002        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1003                { width, height }, { 0, height }  };
1004        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1005        glVertexPointer(2, GL_SHORT, 0, vertices);
1006        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1007        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1008#if defined(GL_OES_EGL_image_external)
1009        if (GLExtensions::getInstance().haveTextureExternal()) {
1010            glDisable(GL_TEXTURE_EXTERNAL_OES);
1011        }
1012#endif
1013        glEnable(GL_TEXTURE_2D);
1014        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1015        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1016        glMatrixMode(GL_TEXTURE);
1017        glLoadIdentity();
1018        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1019        Region::const_iterator it = region.begin();
1020        Region::const_iterator const end = region.end();
1021        while (it != end) {
1022            const Rect& r = *it++;
1023            const GLint sy = height - (r.top + r.height());
1024            glScissor(r.left, sy, r.width(), r.height());
1025            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1026        }
1027        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1028        glLoadIdentity();
1029        glMatrixMode(GL_MODELVIEW);
1030    }
1031}
1032
1033void SurfaceFlinger::debugShowFPS() const
1034{
1035    static int mFrameCount;
1036    static int mLastFrameCount = 0;
1037    static nsecs_t mLastFpsTime = 0;
1038    static float mFps = 0;
1039    mFrameCount++;
1040    nsecs_t now = systemTime();
1041    nsecs_t diff = now - mLastFpsTime;
1042    if (diff > ms2ns(250)) {
1043        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1044        mLastFpsTime = now;
1045        mLastFrameCount = mFrameCount;
1046    }
1047    // XXX: mFPS has the value we want
1048 }
1049
1050status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1051{
1052    Mutex::Autolock _l(mStateLock);
1053    addLayer_l(layer);
1054    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1055    return NO_ERROR;
1056}
1057
1058status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1059{
1060    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1061    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1062}
1063
1064ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1065        const sp<LayerBaseClient>& lbc)
1066{
1067    Mutex::Autolock _l(mStateLock);
1068
1069    // attach this layer to the client
1070    ssize_t name = client->attachLayer(lbc);
1071
1072    // add this layer to the current state list
1073    addLayer_l(lbc);
1074
1075    return name;
1076}
1077
1078status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1079{
1080    Mutex::Autolock _l(mStateLock);
1081    status_t err = purgatorizeLayer_l(layer);
1082    if (err == NO_ERROR)
1083        setTransactionFlags(eTransactionNeeded);
1084    return err;
1085}
1086
1087status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1088{
1089    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1090    if (lbc != 0) {
1091        mLayerMap.removeItem( lbc->getSurface()->asBinder() );
1092    }
1093    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1094    if (index >= 0) {
1095        mLayersRemoved = true;
1096        return NO_ERROR;
1097    }
1098    return status_t(index);
1099}
1100
1101status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1102{
1103    // First add the layer to the purgatory list, which makes sure it won't
1104    // go away, then remove it from the main list (through a transaction).
1105    ssize_t err = removeLayer_l(layerBase);
1106    if (err >= 0) {
1107        mLayerPurgatory.add(layerBase);
1108    }
1109
1110    layerBase->onRemoved();
1111
1112    // it's possible that we don't find a layer, because it might
1113    // have been destroyed already -- this is not technically an error
1114    // from the user because there is a race between Client::destroySurface(),
1115    // ~Client() and ~ISurface().
1116    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1117}
1118
1119status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1120{
1121    layer->forceVisibilityTransaction();
1122    setTransactionFlags(eTraversalNeeded);
1123    return NO_ERROR;
1124}
1125
1126uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1127{
1128    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1129}
1130
1131uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1132{
1133    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1134    if ((old & flags)==0) { // wake the server up
1135        signalEvent();
1136    }
1137    return old;
1138}
1139
1140void SurfaceFlinger::openGlobalTransaction()
1141{
1142    android_atomic_inc(&mTransactionCount);
1143}
1144
1145void SurfaceFlinger::closeGlobalTransaction()
1146{
1147    if (android_atomic_dec(&mTransactionCount) == 1) {
1148        signalEvent();
1149
1150        // if there is a transaction with a resize, wait for it to
1151        // take effect before returning.
1152        Mutex::Autolock _l(mStateLock);
1153        while (mResizeTransationPending) {
1154            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1155            if (CC_UNLIKELY(err != NO_ERROR)) {
1156                // just in case something goes wrong in SF, return to the
1157                // called after a few seconds.
1158                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1159                mResizeTransationPending = false;
1160                break;
1161            }
1162        }
1163    }
1164}
1165
1166status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1167{
1168    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1169        return BAD_VALUE;
1170
1171    Mutex::Autolock _l(mStateLock);
1172    mCurrentState.freezeDisplay = 1;
1173    setTransactionFlags(eTransactionNeeded);
1174
1175    // flags is intended to communicate some sort of animation behavior
1176    // (for instance fading)
1177    return NO_ERROR;
1178}
1179
1180status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1181{
1182    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1183        return BAD_VALUE;
1184
1185    Mutex::Autolock _l(mStateLock);
1186    mCurrentState.freezeDisplay = 0;
1187    setTransactionFlags(eTransactionNeeded);
1188
1189    // flags is intended to communicate some sort of animation behavior
1190    // (for instance fading)
1191    return NO_ERROR;
1192}
1193
1194int SurfaceFlinger::setOrientation(DisplayID dpy,
1195        int orientation, uint32_t flags)
1196{
1197    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1198        return BAD_VALUE;
1199
1200    Mutex::Autolock _l(mStateLock);
1201    if (mCurrentState.orientation != orientation) {
1202        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1203            mCurrentState.orientationType = flags;
1204            mCurrentState.orientation = orientation;
1205            setTransactionFlags(eTransactionNeeded);
1206            mTransactionCV.wait(mStateLock);
1207        } else {
1208            orientation = BAD_VALUE;
1209        }
1210    }
1211    return orientation;
1212}
1213
1214sp<ISurface> SurfaceFlinger::createSurface(const sp<Client>& client, int pid,
1215        const String8& name, ISurfaceComposerClient::surface_data_t* params,
1216        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1217        uint32_t flags)
1218{
1219    sp<LayerBaseClient> layer;
1220    sp<LayerBaseClient::Surface> surfaceHandle;
1221
1222    if (int32_t(w|h) < 0) {
1223        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1224                int(w), int(h));
1225        return surfaceHandle;
1226    }
1227
1228    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1229    sp<Layer> normalLayer;
1230    switch (flags & eFXSurfaceMask) {
1231        case eFXSurfaceNormal:
1232            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1233            layer = normalLayer;
1234            break;
1235        case eFXSurfaceBlur:
1236            // for now we treat Blur as Dim, until we can implement it
1237            // efficiently.
1238        case eFXSurfaceDim:
1239            layer = createDimSurface(client, d, w, h, flags);
1240            break;
1241    }
1242
1243    if (layer != 0) {
1244        layer->initStates(w, h, flags);
1245        layer->setName(name);
1246        ssize_t token = addClientLayer(client, layer);
1247
1248        surfaceHandle = layer->getSurface();
1249        if (surfaceHandle != 0) {
1250            params->token = token;
1251            params->identity = surfaceHandle->getIdentity();
1252            params->width = w;
1253            params->height = h;
1254            params->format = format;
1255            if (normalLayer != 0) {
1256                Mutex::Autolock _l(mStateLock);
1257                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1258            }
1259        }
1260
1261        setTransactionFlags(eTransactionNeeded);
1262    }
1263
1264    return surfaceHandle;
1265}
1266
1267sp<Layer> SurfaceFlinger::createNormalSurface(
1268        const sp<Client>& client, DisplayID display,
1269        uint32_t w, uint32_t h, uint32_t flags,
1270        PixelFormat& format)
1271{
1272    // initialize the surfaces
1273    switch (format) { // TODO: take h/w into account
1274    case PIXEL_FORMAT_TRANSPARENT:
1275    case PIXEL_FORMAT_TRANSLUCENT:
1276        format = PIXEL_FORMAT_RGBA_8888;
1277        break;
1278    case PIXEL_FORMAT_OPAQUE:
1279#ifdef NO_RGBX_8888
1280        format = PIXEL_FORMAT_RGB_565;
1281#else
1282        format = PIXEL_FORMAT_RGBX_8888;
1283#endif
1284        break;
1285    }
1286
1287#ifdef NO_RGBX_8888
1288    if (format == PIXEL_FORMAT_RGBX_8888)
1289        format = PIXEL_FORMAT_RGBA_8888;
1290#endif
1291
1292    sp<Layer> layer = new Layer(this, display, client);
1293    status_t err = layer->setBuffers(w, h, format, flags);
1294    if (LIKELY(err != NO_ERROR)) {
1295        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1296        layer.clear();
1297    }
1298    return layer;
1299}
1300
1301sp<LayerDim> SurfaceFlinger::createDimSurface(
1302        const sp<Client>& client, DisplayID display,
1303        uint32_t w, uint32_t h, uint32_t flags)
1304{
1305    sp<LayerDim> layer = new LayerDim(this, display, client);
1306    layer->initStates(w, h, flags);
1307    return layer;
1308}
1309
1310status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1311{
1312    /*
1313     * called by the window manager, when a surface should be marked for
1314     * destruction.
1315     *
1316     * The surface is removed from the current and drawing lists, but placed
1317     * in the purgatory queue, so it's not destroyed right-away (we need
1318     * to wait for all client's references to go away first).
1319     */
1320
1321    status_t err = NAME_NOT_FOUND;
1322    Mutex::Autolock _l(mStateLock);
1323    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1324    if (layer != 0) {
1325        err = purgatorizeLayer_l(layer);
1326        if (err == NO_ERROR) {
1327            setTransactionFlags(eTransactionNeeded);
1328        }
1329    }
1330    return err;
1331}
1332
1333status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1334{
1335    // called by ~ISurface() when all references are gone
1336
1337    class MessageDestroySurface : public MessageBase {
1338        SurfaceFlinger* flinger;
1339        sp<LayerBaseClient> layer;
1340    public:
1341        MessageDestroySurface(
1342                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1343            : flinger(flinger), layer(layer) { }
1344        virtual bool handler() {
1345            sp<LayerBaseClient> l(layer);
1346            layer.clear(); // clear it outside of the lock;
1347            Mutex::Autolock _l(flinger->mStateLock);
1348            /*
1349             * remove the layer from the current list -- chances are that it's
1350             * not in the list anyway, because it should have been removed
1351             * already upon request of the client (eg: window manager).
1352             * However, a buggy client could have not done that.
1353             * Since we know we don't have any more clients, we don't need
1354             * to use the purgatory.
1355             */
1356            status_t err = flinger->removeLayer_l(l);
1357            if (err == NAME_NOT_FOUND) {
1358                // The surface wasn't in the current list, which means it was
1359                // removed already, which means it is in the purgatory,
1360                // and need to be removed from there.
1361                // This needs to happen from the main thread since its dtor
1362                // must run from there (b/c of OpenGL ES). Additionally, we
1363                // can't really acquire our internal lock from
1364                // destroySurface() -- see postMessage() below.
1365                ssize_t idx = flinger->mLayerPurgatory.remove(l);
1366                LOGE_IF(idx < 0,
1367                        "layer=%p is not in the purgatory list", l.get());
1368            }
1369
1370            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1371                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1372            return true;
1373        }
1374    };
1375
1376    postMessageAsync( new MessageDestroySurface(this, layer) );
1377    return NO_ERROR;
1378}
1379
1380status_t SurfaceFlinger::setClientState(
1381        const sp<Client>& client,
1382        int32_t count,
1383        const layer_state_t* states)
1384{
1385    Mutex::Autolock _l(mStateLock);
1386    uint32_t flags = 0;
1387    for (int i=0 ; i<count ; i++) {
1388        const layer_state_t& s(states[i]);
1389        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1390        if (layer != 0) {
1391            const uint32_t what = s.what;
1392            if (what & ePositionChanged) {
1393                if (layer->setPosition(s.x, s.y))
1394                    flags |= eTraversalNeeded;
1395            }
1396            if (what & eLayerChanged) {
1397                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1398                if (layer->setLayer(s.z)) {
1399                    mCurrentState.layersSortedByZ.removeAt(idx);
1400                    mCurrentState.layersSortedByZ.add(layer);
1401                    // we need traversal (state changed)
1402                    // AND transaction (list changed)
1403                    flags |= eTransactionNeeded|eTraversalNeeded;
1404                }
1405            }
1406            if (what & eSizeChanged) {
1407                if (layer->setSize(s.w, s.h)) {
1408                    flags |= eTraversalNeeded;
1409                    mResizeTransationPending = true;
1410                }
1411            }
1412            if (what & eAlphaChanged) {
1413                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1414                    flags |= eTraversalNeeded;
1415            }
1416            if (what & eMatrixChanged) {
1417                if (layer->setMatrix(s.matrix))
1418                    flags |= eTraversalNeeded;
1419            }
1420            if (what & eTransparentRegionChanged) {
1421                if (layer->setTransparentRegionHint(s.transparentRegion))
1422                    flags |= eTraversalNeeded;
1423            }
1424            if (what & eVisibilityChanged) {
1425                if (layer->setFlags(s.flags, s.mask))
1426                    flags |= eTraversalNeeded;
1427            }
1428        }
1429    }
1430    if (flags) {
1431        setTransactionFlags(flags);
1432    }
1433    return NO_ERROR;
1434}
1435
1436void SurfaceFlinger::screenReleased(int dpy)
1437{
1438    // this may be called by a signal handler, we can't do too much in here
1439    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1440    signalEvent();
1441}
1442
1443void SurfaceFlinger::screenAcquired(int dpy)
1444{
1445    // this may be called by a signal handler, we can't do too much in here
1446    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1447    signalEvent();
1448}
1449
1450status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1451{
1452    const size_t SIZE = 4096;
1453    char buffer[SIZE];
1454    String8 result;
1455    if (!mDump.checkCalling()) {
1456        snprintf(buffer, SIZE, "Permission Denial: "
1457                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1458                IPCThreadState::self()->getCallingPid(),
1459                IPCThreadState::self()->getCallingUid());
1460        result.append(buffer);
1461    } else {
1462
1463        // figure out if we're stuck somewhere
1464        const nsecs_t now = systemTime();
1465        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1466        const nsecs_t inTransaction(mDebugInTransaction);
1467        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1468        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1469
1470        // Try to get the main lock, but don't insist if we can't
1471        // (this would indicate SF is stuck, but we want to be able to
1472        // print something in dumpsys).
1473        int retry = 3;
1474        while (mStateLock.tryLock()<0 && --retry>=0) {
1475            usleep(1000000);
1476        }
1477        const bool locked(retry >= 0);
1478        if (!locked) {
1479            snprintf(buffer, SIZE,
1480                    "SurfaceFlinger appears to be unresponsive, "
1481                    "dumping anyways (no locks held)\n");
1482            result.append(buffer);
1483        }
1484
1485        /*
1486         * Dump the visible layer list
1487         */
1488        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1489        const size_t count = currentLayers.size();
1490        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1491        result.append(buffer);
1492        for (size_t i=0 ; i<count ; i++) {
1493            const sp<LayerBase>& layer(currentLayers[i]);
1494            layer->dump(result, buffer, SIZE);
1495            const Layer::State& s(layer->drawingState());
1496            s.transparentRegion.dump(result, "transparentRegion");
1497            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1498            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1499        }
1500
1501        /*
1502         * Dump the layers in the purgatory
1503         */
1504
1505        const size_t purgatorySize =  mLayerPurgatory.size();
1506        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1507        result.append(buffer);
1508        for (size_t i=0 ; i<purgatorySize ; i++) {
1509            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1510            layer->shortDump(result, buffer, SIZE);
1511        }
1512
1513        /*
1514         * Dump SurfaceFlinger global state
1515         */
1516
1517        snprintf(buffer, SIZE, "SurfaceFlinger global state\n");
1518        result.append(buffer);
1519        mWormholeRegion.dump(result, "WormholeRegion");
1520        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1521        snprintf(buffer, SIZE,
1522                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1523                mFreezeDisplay?"yes":"no", mFreezeCount,
1524                mCurrentState.orientation, hw.canDraw());
1525        result.append(buffer);
1526        snprintf(buffer, SIZE,
1527                "  last eglSwapBuffers() time: %f us\n"
1528                "  last transaction time     : %f us\n",
1529                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1530        result.append(buffer);
1531
1532        if (inSwapBuffersDuration || !locked) {
1533            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1534                    inSwapBuffersDuration/1000.0);
1535            result.append(buffer);
1536        }
1537
1538        if (inTransactionDuration || !locked) {
1539            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1540                    inTransactionDuration/1000.0);
1541            result.append(buffer);
1542        }
1543
1544        /*
1545         * Dump HWComposer state
1546         */
1547        HWComposer& hwc(hw.getHwComposer());
1548        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1549                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1550                mDebugDisableHWC ? "disabled" : "enabled");
1551        result.append(buffer);
1552        hwc.dump(result, buffer, SIZE);
1553
1554        /*
1555         * Dump gralloc state
1556         */
1557        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1558        alloc.dump(result);
1559        hw.dump(result);
1560
1561        if (locked) {
1562            mStateLock.unlock();
1563        }
1564    }
1565    write(fd, result.string(), result.size());
1566    return NO_ERROR;
1567}
1568
1569status_t SurfaceFlinger::onTransact(
1570    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1571{
1572    switch (code) {
1573        case CREATE_CONNECTION:
1574        case OPEN_GLOBAL_TRANSACTION:
1575        case CLOSE_GLOBAL_TRANSACTION:
1576        case SET_ORIENTATION:
1577        case FREEZE_DISPLAY:
1578        case UNFREEZE_DISPLAY:
1579        case BOOT_FINISHED:
1580        case TURN_ELECTRON_BEAM_OFF:
1581        case TURN_ELECTRON_BEAM_ON:
1582        {
1583            // codes that require permission check
1584            IPCThreadState* ipc = IPCThreadState::self();
1585            const int pid = ipc->getCallingPid();
1586            const int uid = ipc->getCallingUid();
1587            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1588                LOGE("Permission Denial: "
1589                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1590                return PERMISSION_DENIED;
1591            }
1592            break;
1593        }
1594        case CAPTURE_SCREEN:
1595        {
1596            // codes that require permission check
1597            IPCThreadState* ipc = IPCThreadState::self();
1598            const int pid = ipc->getCallingPid();
1599            const int uid = ipc->getCallingUid();
1600            if ((uid != AID_GRAPHICS) && !mReadFramebuffer.check(pid, uid)) {
1601                LOGE("Permission Denial: "
1602                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1603                return PERMISSION_DENIED;
1604            }
1605            break;
1606        }
1607    }
1608
1609    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1610    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1611        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1612        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1613            IPCThreadState* ipc = IPCThreadState::self();
1614            const int pid = ipc->getCallingPid();
1615            const int uid = ipc->getCallingUid();
1616            LOGE("Permission Denial: "
1617                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1618            return PERMISSION_DENIED;
1619        }
1620        int n;
1621        switch (code) {
1622            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1623            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1624                return NO_ERROR;
1625            case 1002:  // SHOW_UPDATES
1626                n = data.readInt32();
1627                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1628                return NO_ERROR;
1629            case 1003:  // SHOW_BACKGROUND
1630                n = data.readInt32();
1631                mDebugBackground = n ? 1 : 0;
1632                return NO_ERROR;
1633            case 1008:  // toggle use of hw composer
1634                n = data.readInt32();
1635                mDebugDisableHWC = n ? 1 : 0;
1636                invalidateHwcGeometry();
1637                // fall-through...
1638            case 1004:{ // repaint everything
1639                Mutex::Autolock _l(mStateLock);
1640                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1641                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1642                signalEvent();
1643                return NO_ERROR;
1644            }
1645            case 1005:{ // force transaction
1646                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1647                return NO_ERROR;
1648            }
1649            case 1006:{ // enable/disable GraphicLog
1650                int enabled = data.readInt32();
1651                GraphicLog::getInstance().setEnabled(enabled);
1652                return NO_ERROR;
1653            }
1654            case 1007: // set mFreezeCount
1655                mFreezeCount = data.readInt32();
1656                mFreezeDisplayTime = 0;
1657                return NO_ERROR;
1658            case 1010:  // interrogate.
1659                reply->writeInt32(0);
1660                reply->writeInt32(0);
1661                reply->writeInt32(mDebugRegion);
1662                reply->writeInt32(mDebugBackground);
1663                return NO_ERROR;
1664            case 1013: {
1665                Mutex::Autolock _l(mStateLock);
1666                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1667                reply->writeInt32(hw.getPageFlipCount());
1668            }
1669            return NO_ERROR;
1670        }
1671    }
1672    return err;
1673}
1674
1675// ---------------------------------------------------------------------------
1676
1677status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1678        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1679{
1680    if (!GLExtensions::getInstance().haveFramebufferObject())
1681        return INVALID_OPERATION;
1682
1683    // get screen geometry
1684    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1685    const uint32_t hw_w = hw.getWidth();
1686    const uint32_t hw_h = hw.getHeight();
1687    GLfloat u = 1;
1688    GLfloat v = 1;
1689
1690    // make sure to clear all GL error flags
1691    while ( glGetError() != GL_NO_ERROR ) ;
1692
1693    // create a FBO
1694    GLuint name, tname;
1695    glGenTextures(1, &tname);
1696    glBindTexture(GL_TEXTURE_2D, tname);
1697    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1698            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1699    if (glGetError() != GL_NO_ERROR) {
1700        while ( glGetError() != GL_NO_ERROR ) ;
1701        GLint tw = (2 << (31 - clz(hw_w)));
1702        GLint th = (2 << (31 - clz(hw_h)));
1703        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1704                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1705        u = GLfloat(hw_w) / tw;
1706        v = GLfloat(hw_h) / th;
1707    }
1708    glGenFramebuffersOES(1, &name);
1709    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1710    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1711            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1712
1713    // redraw the screen entirely...
1714    glClearColor(0,0,0,1);
1715    glClear(GL_COLOR_BUFFER_BIT);
1716    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1717    const size_t count = layers.size();
1718    for (size_t i=0 ; i<count ; ++i) {
1719        const sp<LayerBase>& layer(layers[i]);
1720        layer->drawForSreenShot();
1721    }
1722
1723    // back to main framebuffer
1724    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1725    glDisable(GL_SCISSOR_TEST);
1726    glDeleteFramebuffersOES(1, &name);
1727
1728    *textureName = tname;
1729    *uOut = u;
1730    *vOut = v;
1731    return NO_ERROR;
1732}
1733
1734// ---------------------------------------------------------------------------
1735
1736status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1737{
1738    status_t result = PERMISSION_DENIED;
1739
1740    if (!GLExtensions::getInstance().haveFramebufferObject())
1741        return INVALID_OPERATION;
1742
1743    // get screen geometry
1744    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1745    const uint32_t hw_w = hw.getWidth();
1746    const uint32_t hw_h = hw.getHeight();
1747    const Region screenBounds(hw.bounds());
1748
1749    GLfloat u, v;
1750    GLuint tname;
1751    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1752    if (result != NO_ERROR) {
1753        return result;
1754    }
1755
1756    GLfloat vtx[8];
1757    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1758    glEnable(GL_TEXTURE_2D);
1759    glBindTexture(GL_TEXTURE_2D, tname);
1760    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1761    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1762    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1763    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1764    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1765    glVertexPointer(2, GL_FLOAT, 0, vtx);
1766
1767    class s_curve_interpolator {
1768        const float nbFrames, s, v;
1769    public:
1770        s_curve_interpolator(int nbFrames, float s)
1771        : nbFrames(1.0f / (nbFrames-1)), s(s),
1772          v(1.0f + expf(-s + 0.5f*s)) {
1773        }
1774        float operator()(int f) {
1775            const float x = f * nbFrames;
1776            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1777        }
1778    };
1779
1780    class v_stretch {
1781        const GLfloat hw_w, hw_h;
1782    public:
1783        v_stretch(uint32_t hw_w, uint32_t hw_h)
1784        : hw_w(hw_w), hw_h(hw_h) {
1785        }
1786        void operator()(GLfloat* vtx, float v) {
1787            const GLfloat w = hw_w + (hw_w * v);
1788            const GLfloat h = hw_h - (hw_h * v);
1789            const GLfloat x = (hw_w - w) * 0.5f;
1790            const GLfloat y = (hw_h - h) * 0.5f;
1791            vtx[0] = x;         vtx[1] = y;
1792            vtx[2] = x;         vtx[3] = y + h;
1793            vtx[4] = x + w;     vtx[5] = y + h;
1794            vtx[6] = x + w;     vtx[7] = y;
1795        }
1796    };
1797
1798    class h_stretch {
1799        const GLfloat hw_w, hw_h;
1800    public:
1801        h_stretch(uint32_t hw_w, uint32_t hw_h)
1802        : hw_w(hw_w), hw_h(hw_h) {
1803        }
1804        void operator()(GLfloat* vtx, float v) {
1805            const GLfloat w = hw_w - (hw_w * v);
1806            const GLfloat h = 1.0f;
1807            const GLfloat x = (hw_w - w) * 0.5f;
1808            const GLfloat y = (hw_h - h) * 0.5f;
1809            vtx[0] = x;         vtx[1] = y;
1810            vtx[2] = x;         vtx[3] = y + h;
1811            vtx[4] = x + w;     vtx[5] = y + h;
1812            vtx[6] = x + w;     vtx[7] = y;
1813        }
1814    };
1815
1816    // the full animation is 24 frames
1817    const int nbFrames = 12;
1818    s_curve_interpolator itr(nbFrames, 7.5f);
1819    s_curve_interpolator itg(nbFrames, 8.0f);
1820    s_curve_interpolator itb(nbFrames, 8.5f);
1821
1822    v_stretch vverts(hw_w, hw_h);
1823    glEnable(GL_BLEND);
1824    glBlendFunc(GL_ONE, GL_ONE);
1825    for (int i=0 ; i<nbFrames ; i++) {
1826        float x, y, w, h;
1827        const float vr = itr(i);
1828        const float vg = itg(i);
1829        const float vb = itb(i);
1830
1831        // clear screen
1832        glColorMask(1,1,1,1);
1833        glClear(GL_COLOR_BUFFER_BIT);
1834        glEnable(GL_TEXTURE_2D);
1835
1836        // draw the red plane
1837        vverts(vtx, vr);
1838        glColorMask(1,0,0,1);
1839        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1840
1841        // draw the green plane
1842        vverts(vtx, vg);
1843        glColorMask(0,1,0,1);
1844        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1845
1846        // draw the blue plane
1847        vverts(vtx, vb);
1848        glColorMask(0,0,1,1);
1849        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1850
1851        // draw the white highlight (we use the last vertices)
1852        glDisable(GL_TEXTURE_2D);
1853        glColorMask(1,1,1,1);
1854        glColor4f(vg, vg, vg, 1);
1855        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1856        hw.flip(screenBounds);
1857    }
1858
1859    h_stretch hverts(hw_w, hw_h);
1860    glDisable(GL_BLEND);
1861    glDisable(GL_TEXTURE_2D);
1862    glColorMask(1,1,1,1);
1863    for (int i=0 ; i<nbFrames ; i++) {
1864        const float v = itg(i);
1865        hverts(vtx, v);
1866        glClear(GL_COLOR_BUFFER_BIT);
1867        glColor4f(1-v, 1-v, 1-v, 1);
1868        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1869        hw.flip(screenBounds);
1870    }
1871
1872    glColorMask(1,1,1,1);
1873    glEnable(GL_SCISSOR_TEST);
1874    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1875    glDeleteTextures(1, &tname);
1876    return NO_ERROR;
1877}
1878
1879status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1880{
1881    status_t result = PERMISSION_DENIED;
1882
1883    if (!GLExtensions::getInstance().haveFramebufferObject())
1884        return INVALID_OPERATION;
1885
1886
1887    // get screen geometry
1888    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1889    const uint32_t hw_w = hw.getWidth();
1890    const uint32_t hw_h = hw.getHeight();
1891    const Region screenBounds(hw.bounds());
1892
1893    GLfloat u, v;
1894    GLuint tname;
1895    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1896    if (result != NO_ERROR) {
1897        return result;
1898    }
1899
1900    // back to main framebuffer
1901    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1902    glDisable(GL_SCISSOR_TEST);
1903
1904    GLfloat vtx[8];
1905    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1906    glEnable(GL_TEXTURE_2D);
1907    glBindTexture(GL_TEXTURE_2D, tname);
1908    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1909    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1910    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1911    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1912    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1913    glVertexPointer(2, GL_FLOAT, 0, vtx);
1914
1915    class s_curve_interpolator {
1916        const float nbFrames, s, v;
1917    public:
1918        s_curve_interpolator(int nbFrames, float s)
1919        : nbFrames(1.0f / (nbFrames-1)), s(s),
1920          v(1.0f + expf(-s + 0.5f*s)) {
1921        }
1922        float operator()(int f) {
1923            const float x = f * nbFrames;
1924            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1925        }
1926    };
1927
1928    class v_stretch {
1929        const GLfloat hw_w, hw_h;
1930    public:
1931        v_stretch(uint32_t hw_w, uint32_t hw_h)
1932        : hw_w(hw_w), hw_h(hw_h) {
1933        }
1934        void operator()(GLfloat* vtx, float v) {
1935            const GLfloat w = hw_w + (hw_w * v);
1936            const GLfloat h = hw_h - (hw_h * v);
1937            const GLfloat x = (hw_w - w) * 0.5f;
1938            const GLfloat y = (hw_h - h) * 0.5f;
1939            vtx[0] = x;         vtx[1] = y;
1940            vtx[2] = x;         vtx[3] = y + h;
1941            vtx[4] = x + w;     vtx[5] = y + h;
1942            vtx[6] = x + w;     vtx[7] = y;
1943        }
1944    };
1945
1946    class h_stretch {
1947        const GLfloat hw_w, hw_h;
1948    public:
1949        h_stretch(uint32_t hw_w, uint32_t hw_h)
1950        : hw_w(hw_w), hw_h(hw_h) {
1951        }
1952        void operator()(GLfloat* vtx, float v) {
1953            const GLfloat w = hw_w - (hw_w * v);
1954            const GLfloat h = 1.0f;
1955            const GLfloat x = (hw_w - w) * 0.5f;
1956            const GLfloat y = (hw_h - h) * 0.5f;
1957            vtx[0] = x;         vtx[1] = y;
1958            vtx[2] = x;         vtx[3] = y + h;
1959            vtx[4] = x + w;     vtx[5] = y + h;
1960            vtx[6] = x + w;     vtx[7] = y;
1961        }
1962    };
1963
1964    // the full animation is 12 frames
1965    int nbFrames = 8;
1966    s_curve_interpolator itr(nbFrames, 7.5f);
1967    s_curve_interpolator itg(nbFrames, 8.0f);
1968    s_curve_interpolator itb(nbFrames, 8.5f);
1969
1970    h_stretch hverts(hw_w, hw_h);
1971    glDisable(GL_BLEND);
1972    glDisable(GL_TEXTURE_2D);
1973    glColorMask(1,1,1,1);
1974    for (int i=nbFrames-1 ; i>=0 ; i--) {
1975        const float v = itg(i);
1976        hverts(vtx, v);
1977        glClear(GL_COLOR_BUFFER_BIT);
1978        glColor4f(1-v, 1-v, 1-v, 1);
1979        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1980        hw.flip(screenBounds);
1981    }
1982
1983    nbFrames = 4;
1984    v_stretch vverts(hw_w, hw_h);
1985    glEnable(GL_BLEND);
1986    glBlendFunc(GL_ONE, GL_ONE);
1987    for (int i=nbFrames-1 ; i>=0 ; i--) {
1988        float x, y, w, h;
1989        const float vr = itr(i);
1990        const float vg = itg(i);
1991        const float vb = itb(i);
1992
1993        // clear screen
1994        glColorMask(1,1,1,1);
1995        glClear(GL_COLOR_BUFFER_BIT);
1996        glEnable(GL_TEXTURE_2D);
1997
1998        // draw the red plane
1999        vverts(vtx, vr);
2000        glColorMask(1,0,0,1);
2001        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2002
2003        // draw the green plane
2004        vverts(vtx, vg);
2005        glColorMask(0,1,0,1);
2006        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2007
2008        // draw the blue plane
2009        vverts(vtx, vb);
2010        glColorMask(0,0,1,1);
2011        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2012
2013        hw.flip(screenBounds);
2014    }
2015
2016    glColorMask(1,1,1,1);
2017    glEnable(GL_SCISSOR_TEST);
2018    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2019    glDeleteTextures(1, &tname);
2020
2021    return NO_ERROR;
2022}
2023
2024// ---------------------------------------------------------------------------
2025
2026status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2027{
2028    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2029    if (!hw.canDraw()) {
2030        // we're already off
2031        return NO_ERROR;
2032    }
2033    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2034        electronBeamOffAnimationImplLocked();
2035    }
2036
2037    // always clear the whole screen at the end of the animation
2038    glClearColor(0,0,0,1);
2039    glDisable(GL_SCISSOR_TEST);
2040    glClear(GL_COLOR_BUFFER_BIT);
2041    glEnable(GL_SCISSOR_TEST);
2042    hw.flip( Region(hw.bounds()) );
2043
2044    hw.setCanDraw(false);
2045    return NO_ERROR;
2046}
2047
2048status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2049{
2050    class MessageTurnElectronBeamOff : public MessageBase {
2051        SurfaceFlinger* flinger;
2052        int32_t mode;
2053        status_t result;
2054    public:
2055        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2056            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2057        }
2058        status_t getResult() const {
2059            return result;
2060        }
2061        virtual bool handler() {
2062            Mutex::Autolock _l(flinger->mStateLock);
2063            result = flinger->turnElectronBeamOffImplLocked(mode);
2064            return true;
2065        }
2066    };
2067
2068    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2069    status_t res = postMessageSync(msg);
2070    if (res == NO_ERROR) {
2071        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2072
2073        // work-around: when the power-manager calls us we activate the
2074        // animation. eventually, the "on" animation will be called
2075        // by the power-manager itself
2076        mElectronBeamAnimationMode = mode;
2077    }
2078    return res;
2079}
2080
2081// ---------------------------------------------------------------------------
2082
2083status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2084{
2085    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2086    if (hw.canDraw()) {
2087        // we're already on
2088        return NO_ERROR;
2089    }
2090    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2091        electronBeamOnAnimationImplLocked();
2092    }
2093    hw.setCanDraw(true);
2094
2095    // make sure to redraw the whole screen when the animation is done
2096    mDirtyRegion.set(hw.bounds());
2097    signalEvent();
2098
2099    return NO_ERROR;
2100}
2101
2102status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2103{
2104    class MessageTurnElectronBeamOn : public MessageBase {
2105        SurfaceFlinger* flinger;
2106        int32_t mode;
2107        status_t result;
2108    public:
2109        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2110            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2111        }
2112        status_t getResult() const {
2113            return result;
2114        }
2115        virtual bool handler() {
2116            Mutex::Autolock _l(flinger->mStateLock);
2117            result = flinger->turnElectronBeamOnImplLocked(mode);
2118            return true;
2119        }
2120    };
2121
2122    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2123    return NO_ERROR;
2124}
2125
2126// ---------------------------------------------------------------------------
2127
2128status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2129        sp<IMemoryHeap>* heap,
2130        uint32_t* w, uint32_t* h, PixelFormat* f,
2131        uint32_t sw, uint32_t sh,
2132        uint32_t minLayerZ, uint32_t maxLayerZ)
2133{
2134    status_t result = PERMISSION_DENIED;
2135
2136    // only one display supported for now
2137    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2138        return BAD_VALUE;
2139
2140    if (!GLExtensions::getInstance().haveFramebufferObject())
2141        return INVALID_OPERATION;
2142
2143    // get screen geometry
2144    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2145    const uint32_t hw_w = hw.getWidth();
2146    const uint32_t hw_h = hw.getHeight();
2147
2148    if ((sw > hw_w) || (sh > hw_h))
2149        return BAD_VALUE;
2150
2151    sw = (!sw) ? hw_w : sw;
2152    sh = (!sh) ? hw_h : sh;
2153    const size_t size = sw * sh * 4;
2154
2155    LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2156            sw, sh, minLayerZ, maxLayerZ);
2157
2158    // make sure to clear all GL error flags
2159    while ( glGetError() != GL_NO_ERROR ) ;
2160
2161    // create a FBO
2162    GLuint name, tname;
2163    glGenRenderbuffersOES(1, &tname);
2164    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2165    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2166    glGenFramebuffersOES(1, &name);
2167    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2168    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2169            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2170
2171    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2172
2173    LOGD("screenshot: FBO created, status=0x%x", status);
2174
2175    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2176
2177        // invert everything, b/c glReadPixel() below will invert the FB
2178        glViewport(0, 0, sw, sh);
2179        glScissor(0, 0, sw, sh);
2180        glMatrixMode(GL_PROJECTION);
2181        glPushMatrix();
2182        glLoadIdentity();
2183        glOrthof(0, hw_w, 0, hw_h, 0, 1);
2184        glMatrixMode(GL_MODELVIEW);
2185
2186        // redraw the screen entirely...
2187        glClearColor(0,0,0,1);
2188        glClear(GL_COLOR_BUFFER_BIT);
2189
2190        LOGD("screenshot: glClear() issued");
2191
2192        const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2193        const size_t count = layers.size();
2194        for (size_t i=0 ; i<count ; ++i) {
2195            const sp<LayerBase>& layer(layers[i]);
2196            const uint32_t z = layer->drawingState().z;
2197            if (z >= minLayerZ && z <= maxLayerZ) {
2198                layer->drawForSreenShot();
2199            }
2200        }
2201
2202        LOGD("screenshot: All layers rendered");
2203
2204        // XXX: this is needed on tegra
2205        glScissor(0, 0, sw, sh);
2206
2207        // check for errors and return screen capture
2208        if (glGetError() != GL_NO_ERROR) {
2209            // error while rendering
2210            result = INVALID_OPERATION;
2211        } else {
2212            // allocate shared memory large enough to hold the
2213            // screen capture
2214            sp<MemoryHeapBase> base(
2215                    new MemoryHeapBase(size, 0, "screen-capture") );
2216            void* const ptr = base->getBase();
2217            if (ptr) {
2218
2219                LOGD("screenshot: about to call glReadPixels(0,0,%d,%d,...,%p)",
2220                        sw, sh, ptr);
2221
2222                // capture the screen with glReadPixels()
2223                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2224                if (glGetError() == GL_NO_ERROR) {
2225                    *heap = base;
2226                    *w = sw;
2227                    *h = sh;
2228                    *f = PIXEL_FORMAT_RGBA_8888;
2229                    result = NO_ERROR;
2230                }
2231            } else {
2232                result = NO_MEMORY;
2233            }
2234
2235            LOGD("screenshot: glReadPixels() returned %s", strerror(result));
2236
2237        }
2238        glEnable(GL_SCISSOR_TEST);
2239        glViewport(0, 0, hw_w, hw_h);
2240        glMatrixMode(GL_PROJECTION);
2241        glPopMatrix();
2242        glMatrixMode(GL_MODELVIEW);
2243    } else {
2244        result = BAD_VALUE;
2245    }
2246
2247    LOGD("screenshot: about to release FBO resources");
2248
2249    // release FBO resources
2250    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2251    glDeleteRenderbuffersOES(1, &tname);
2252    glDeleteFramebuffersOES(1, &name);
2253
2254    LOGD("screenshot: about to call compositionComplete()");
2255
2256    hw.compositionComplete();
2257
2258    LOGD("screenshot: result = %s", strerror(result));
2259
2260    return result;
2261}
2262
2263
2264status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2265        sp<IMemoryHeap>* heap,
2266        uint32_t* width, uint32_t* height, PixelFormat* format,
2267        uint32_t sw, uint32_t sh,
2268        uint32_t minLayerZ, uint32_t maxLayerZ)
2269{
2270    // only one display supported for now
2271    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2272        return BAD_VALUE;
2273
2274    if (!GLExtensions::getInstance().haveFramebufferObject())
2275        return INVALID_OPERATION;
2276
2277    class MessageCaptureScreen : public MessageBase {
2278        SurfaceFlinger* flinger;
2279        DisplayID dpy;
2280        sp<IMemoryHeap>* heap;
2281        uint32_t* w;
2282        uint32_t* h;
2283        PixelFormat* f;
2284        uint32_t sw;
2285        uint32_t sh;
2286        uint32_t minLayerZ;
2287        uint32_t maxLayerZ;
2288        status_t result;
2289    public:
2290        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2291                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2292                uint32_t sw, uint32_t sh,
2293                uint32_t minLayerZ, uint32_t maxLayerZ)
2294            : flinger(flinger), dpy(dpy),
2295              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2296              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2297              result(PERMISSION_DENIED)
2298        {
2299        }
2300        status_t getResult() const {
2301            return result;
2302        }
2303        virtual bool handler() {
2304            Mutex::Autolock _l(flinger->mStateLock);
2305
2306            // if we have secure windows, never allow the screen capture
2307            if (flinger->mSecureFrameBuffer)
2308                return true;
2309
2310            result = flinger->captureScreenImplLocked(dpy,
2311                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2312
2313            return true;
2314        }
2315    };
2316
2317    sp<MessageBase> msg = new MessageCaptureScreen(this,
2318            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2319    status_t res = postMessageSync(msg);
2320    if (res == NO_ERROR) {
2321        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2322    }
2323    return res;
2324}
2325
2326// ---------------------------------------------------------------------------
2327
2328sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2329{
2330    sp<Layer> result;
2331    Mutex::Autolock _l(mStateLock);
2332    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2333    return result;
2334}
2335
2336// ---------------------------------------------------------------------------
2337
2338Client::Client(const sp<SurfaceFlinger>& flinger)
2339    : mFlinger(flinger), mNameGenerator(1)
2340{
2341}
2342
2343Client::~Client()
2344{
2345    const size_t count = mLayers.size();
2346    for (size_t i=0 ; i<count ; i++) {
2347        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2348        if (layer != 0) {
2349            mFlinger->removeLayer(layer);
2350        }
2351    }
2352}
2353
2354status_t Client::initCheck() const {
2355    return NO_ERROR;
2356}
2357
2358ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2359{
2360    int32_t name = android_atomic_inc(&mNameGenerator);
2361    mLayers.add(name, layer);
2362    return name;
2363}
2364
2365void Client::detachLayer(const LayerBaseClient* layer)
2366{
2367    // we do a linear search here, because this doesn't happen often
2368    const size_t count = mLayers.size();
2369    for (size_t i=0 ; i<count ; i++) {
2370        if (mLayers.valueAt(i) == layer) {
2371            mLayers.removeItemsAt(i, 1);
2372            break;
2373        }
2374    }
2375}
2376sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
2377    sp<LayerBaseClient> lbc;
2378    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
2379    if (layer != 0) {
2380        lbc = layer.promote();
2381        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2382    }
2383    return lbc;
2384}
2385
2386sp<IMemoryHeap> Client::getControlBlock() const {
2387    return 0;
2388}
2389ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
2390    return -1;
2391}
2392sp<ISurface> Client::createSurface(
2393        ISurfaceComposerClient::surface_data_t* params, int pid,
2394        const String8& name,
2395        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2396        uint32_t flags)
2397{
2398    return mFlinger->createSurface(this, pid, name, params,
2399            display, w, h, format, flags);
2400}
2401status_t Client::destroySurface(SurfaceID sid) {
2402    return mFlinger->removeSurface(this, sid);
2403}
2404status_t Client::setState(int32_t count, const layer_state_t* states) {
2405    return mFlinger->setClientState(this, count, states);
2406}
2407
2408// ---------------------------------------------------------------------------
2409
2410UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
2411    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
2412{
2413    const int pgsize = getpagesize();
2414    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
2415
2416    mCblkHeap = new MemoryHeapBase(cblksize, 0,
2417            "SurfaceFlinger Client control-block");
2418
2419    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
2420    if (ctrlblk) { // construct the shared structure in-place.
2421        new(ctrlblk) SharedClient;
2422    }
2423}
2424
2425UserClient::~UserClient()
2426{
2427    if (ctrlblk) {
2428        ctrlblk->~SharedClient();  // destroy our shared-structure.
2429    }
2430
2431    /*
2432     * When a UserClient dies, it's unclear what to do exactly.
2433     * We could go ahead and destroy all surfaces linked to that client
2434     * however, it wouldn't be fair to the main Client
2435     * (usually the the window-manager), which might want to re-target
2436     * the layer to another UserClient.
2437     * I think the best is to do nothing, or not much; in most cases the
2438     * WM itself will go ahead and clean things up when it detects a client of
2439     * his has died.
2440     * The remaining question is what to display? currently we keep
2441     * just keep the current buffer.
2442     */
2443}
2444
2445status_t UserClient::initCheck() const {
2446    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
2447}
2448
2449void UserClient::detachLayer(const Layer* layer)
2450{
2451    int32_t name = layer->getToken();
2452    if (name >= 0) {
2453        int32_t mask = 1LU<<name;
2454        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
2455            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
2456        }
2457    }
2458}
2459
2460sp<IMemoryHeap> UserClient::getControlBlock() const {
2461    return mCblkHeap;
2462}
2463
2464ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
2465{
2466    int32_t name = NAME_NOT_FOUND;
2467    sp<Layer> layer(mFlinger->getLayer(sur));
2468    if (layer == 0) {
2469        return name;
2470    }
2471
2472    // if this layer already has a token, just return it
2473    name = layer->getToken();
2474    if ((name >= 0) && (layer->getClient() == this)) {
2475        return name;
2476    }
2477
2478    name = 0;
2479    do {
2480        int32_t mask = 1LU<<name;
2481        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
2482            // we found and locked that name
2483            status_t err = layer->setToken(
2484                    const_cast<UserClient*>(this), ctrlblk, name);
2485            if (err != NO_ERROR) {
2486                // free the name
2487                android_atomic_and(~mask, &mBitmap);
2488                name = err;
2489            }
2490            break;
2491        }
2492        if (++name > 31)
2493            name = NO_MEMORY;
2494    } while(name >= 0);
2495
2496    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
2497    //        sur->asBinder().get(), name, this, mBitmap);
2498    return name;
2499}
2500
2501sp<ISurface> UserClient::createSurface(
2502        ISurfaceComposerClient::surface_data_t* params, int pid,
2503        const String8& name,
2504        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2505        uint32_t flags) {
2506    return 0;
2507}
2508status_t UserClient::destroySurface(SurfaceID sid) {
2509    return INVALID_OPERATION;
2510}
2511status_t UserClient::setState(int32_t count, const layer_state_t* states) {
2512    return INVALID_OPERATION;
2513}
2514
2515// ---------------------------------------------------------------------------
2516
2517GraphicBufferAlloc::GraphicBufferAlloc() {}
2518
2519GraphicBufferAlloc::~GraphicBufferAlloc() {}
2520
2521sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2522        PixelFormat format, uint32_t usage) {
2523    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2524    status_t err = graphicBuffer->initCheck();
2525    if (err != 0) {
2526        LOGE("createGraphicBuffer: init check failed: %d", err);
2527        return 0;
2528    } else if (graphicBuffer->handle == 0) {
2529        LOGE("createGraphicBuffer: unable to create GraphicBuffer");
2530        return 0;
2531    }
2532    Mutex::Autolock _l(mLock);
2533    mBuffers.add(graphicBuffer);
2534    return graphicBuffer;
2535}
2536
2537void GraphicBufferAlloc::freeAllGraphicBuffersExcept(int bufIdx) {
2538    Mutex::Autolock _l(mLock);
2539    if (0 <= bufIdx && bufIdx < mBuffers.size()) {
2540        sp<GraphicBuffer> b(mBuffers[bufIdx]);
2541        mBuffers.clear();
2542        mBuffers.add(b);
2543    } else {
2544        mBuffers.clear();
2545    }
2546}
2547
2548// ---------------------------------------------------------------------------
2549
2550GraphicPlane::GraphicPlane()
2551    : mHw(0)
2552{
2553}
2554
2555GraphicPlane::~GraphicPlane() {
2556    delete mHw;
2557}
2558
2559bool GraphicPlane::initialized() const {
2560    return mHw ? true : false;
2561}
2562
2563int GraphicPlane::getWidth() const {
2564    return mWidth;
2565}
2566
2567int GraphicPlane::getHeight() const {
2568    return mHeight;
2569}
2570
2571void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2572{
2573    mHw = hw;
2574
2575    // initialize the display orientation transform.
2576    // it's a constant that should come from the display driver.
2577    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2578    char property[PROPERTY_VALUE_MAX];
2579    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2580        //displayOrientation
2581        switch (atoi(property)) {
2582        case 90:
2583            displayOrientation = ISurfaceComposer::eOrientation90;
2584            break;
2585        case 270:
2586            displayOrientation = ISurfaceComposer::eOrientation270;
2587            break;
2588        }
2589    }
2590
2591    const float w = hw->getWidth();
2592    const float h = hw->getHeight();
2593    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2594            &mDisplayTransform);
2595    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2596        mDisplayWidth = h;
2597        mDisplayHeight = w;
2598    } else {
2599        mDisplayWidth = w;
2600        mDisplayHeight = h;
2601    }
2602
2603    setOrientation(ISurfaceComposer::eOrientationDefault);
2604}
2605
2606status_t GraphicPlane::orientationToTransfrom(
2607        int orientation, int w, int h, Transform* tr)
2608{
2609    uint32_t flags = 0;
2610    switch (orientation) {
2611    case ISurfaceComposer::eOrientationDefault:
2612        flags = Transform::ROT_0;
2613        break;
2614    case ISurfaceComposer::eOrientation90:
2615        flags = Transform::ROT_90;
2616        break;
2617    case ISurfaceComposer::eOrientation180:
2618        flags = Transform::ROT_180;
2619        break;
2620    case ISurfaceComposer::eOrientation270:
2621        flags = Transform::ROT_270;
2622        break;
2623    default:
2624        return BAD_VALUE;
2625    }
2626    tr->set(flags, w, h);
2627    return NO_ERROR;
2628}
2629
2630status_t GraphicPlane::setOrientation(int orientation)
2631{
2632    // If the rotation can be handled in hardware, this is where
2633    // the magic should happen.
2634
2635    const DisplayHardware& hw(displayHardware());
2636    const float w = mDisplayWidth;
2637    const float h = mDisplayHeight;
2638    mWidth = int(w);
2639    mHeight = int(h);
2640
2641    Transform orientationTransform;
2642    GraphicPlane::orientationToTransfrom(orientation, w, h,
2643            &orientationTransform);
2644    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2645        mWidth = int(h);
2646        mHeight = int(w);
2647    }
2648
2649    mOrientation = orientation;
2650    mGlobalTransform = mDisplayTransform * orientationTransform;
2651    return NO_ERROR;
2652}
2653
2654const DisplayHardware& GraphicPlane::displayHardware() const {
2655    return *mHw;
2656}
2657
2658DisplayHardware& GraphicPlane::editDisplayHardware() {
2659    return *mHw;
2660}
2661
2662const Transform& GraphicPlane::transform() const {
2663    return mGlobalTransform;
2664}
2665
2666EGLDisplay GraphicPlane::getEGLDisplay() const {
2667    return mHw->getEGLDisplay();
2668}
2669
2670// ---------------------------------------------------------------------------
2671
2672}; // namespace android
2673