SurfaceFlinger.cpp revision 0dd593f22352a0863223fa4ea7e37e926b99282e 
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#include <binder/PermissionCache.h>
36
37#include <utils/String8.h>
38#include <utils/String16.h>
39#include <utils/StopWatch.h>
40
41#include <ui/GraphicBufferAllocator.h>
42#include <ui/GraphicLog.h>
43#include <ui/PixelFormat.h>
44
45#include <pixelflinger/pixelflinger.h>
46#include <GLES/gl.h>
47
48#include "clz.h"
49#include "GLExtensions.h"
50#include "Layer.h"
51#include "LayerDim.h"
52#include "SurfaceFlinger.h"
53
54#include "DisplayHardware/DisplayHardware.h"
55#include "DisplayHardware/HWComposer.h"
56
57#include <private/surfaceflinger/SharedBufferStack.h>
58
59/* ideally AID_GRAPHICS would be in a semi-public header
60 * or there would be a way to map a user/group name to its id
61 */
62#ifndef AID_GRAPHICS
63#define AID_GRAPHICS 1003
64#endif
65
66#define DISPLAY_COUNT       1
67
68namespace android {
69// ---------------------------------------------------------------------------
70
71const String16 sHardwareTest("android.permission.HARDWARE_TEST");
72const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
73const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
74const String16 sDump("android.permission.DUMP");
75
76// ---------------------------------------------------------------------------
77
78SurfaceFlinger::SurfaceFlinger()
79    :   BnSurfaceComposer(), Thread(false),
80        mTransactionFlags(0),
81        mTransactionCount(0),
82        mResizeTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mDeferReleaseConsole(false),
88        mFreezeDisplay(false),
89        mElectronBeamAnimationMode(0),
90        mFreezeCount(0),
91        mFreezeDisplayTime(0),
92        mDebugRegion(0),
93        mDebugBackground(0),
94        mDebugDisableHWC(0),
95        mDebugInSwapBuffers(0),
96        mLastSwapBufferTime(0),
97        mDebugInTransaction(0),
98        mLastTransactionTime(0),
99        mBootFinished(false),
100        mConsoleSignals(0),
101        mSecureFrameBuffer(0)
102{
103    init();
104}
105
106void SurfaceFlinger::init()
107{
108    LOGI("SurfaceFlinger is starting");
109
110    // debugging stuff...
111    char value[PROPERTY_VALUE_MAX];
112    property_get("debug.sf.showupdates", value, "0");
113    mDebugRegion = atoi(value);
114    property_get("debug.sf.showbackground", value, "0");
115    mDebugBackground = atoi(value);
116
117    LOGI_IF(mDebugRegion,       "showupdates enabled");
118    LOGI_IF(mDebugBackground,   "showbackground enabled");
119}
120
121SurfaceFlinger::~SurfaceFlinger()
122{
123    glDeleteTextures(1, &mWormholeTexName);
124}
125
126sp<IMemoryHeap> SurfaceFlinger::getCblk() const
127{
128    return mServerHeap;
129}
130
131sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
132{
133    sp<ISurfaceComposerClient> bclient;
134    sp<Client> client(new Client(this));
135    status_t err = client->initCheck();
136    if (err == NO_ERROR) {
137        bclient = client;
138    }
139    return bclient;
140}
141
142sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
143{
144    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
145    return gba;
146}
147
148const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
149{
150    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
151    const GraphicPlane& plane(mGraphicPlanes[dpy]);
152    return plane;
153}
154
155GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
156{
157    return const_cast<GraphicPlane&>(
158        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
159}
160
161void SurfaceFlinger::bootFinished()
162{
163    const nsecs_t now = systemTime();
164    const nsecs_t duration = now - mBootTime;
165    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
166    mBootFinished = true;
167    property_set("ctl.stop", "bootanim");
168}
169
170void SurfaceFlinger::onFirstRef()
171{
172    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
173
174    // Wait for the main thread to be done with its initialization
175    mReadyToRunBarrier.wait();
176}
177
178static inline uint16_t pack565(int r, int g, int b) {
179    return (r<<11)|(g<<5)|b;
180}
181
182status_t SurfaceFlinger::readyToRun()
183{
184    LOGI(   "SurfaceFlinger's main thread ready to run. "
185            "Initializing graphics H/W...");
186
187    // we only support one display currently
188    int dpy = 0;
189
190    {
191        // initialize the main display
192        GraphicPlane& plane(graphicPlane(dpy));
193        DisplayHardware* const hw = new DisplayHardware(this, dpy);
194        plane.setDisplayHardware(hw);
195    }
196
197    // create the shared control-block
198    mServerHeap = new MemoryHeapBase(4096,
199            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
200    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
201
202    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
203    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
204
205    new(mServerCblk) surface_flinger_cblk_t;
206
207    // initialize primary screen
208    // (other display should be initialized in the same manner, but
209    // asynchronously, as they could come and go. None of this is supported
210    // yet).
211    const GraphicPlane& plane(graphicPlane(dpy));
212    const DisplayHardware& hw = plane.displayHardware();
213    const uint32_t w = hw.getWidth();
214    const uint32_t h = hw.getHeight();
215    const uint32_t f = hw.getFormat();
216    hw.makeCurrent();
217
218    // initialize the shared control block
219    mServerCblk->connected |= 1<<dpy;
220    display_cblk_t* dcblk = mServerCblk->displays + dpy;
221    memset(dcblk, 0, sizeof(display_cblk_t));
222    dcblk->w            = plane.getWidth();
223    dcblk->h            = plane.getHeight();
224    dcblk->format       = f;
225    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
226    dcblk->xdpi         = hw.getDpiX();
227    dcblk->ydpi         = hw.getDpiY();
228    dcblk->fps          = hw.getRefreshRate();
229    dcblk->density      = hw.getDensity();
230
231    // Initialize OpenGL|ES
232    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
233    glPixelStorei(GL_PACK_ALIGNMENT, 4);
234    glEnableClientState(GL_VERTEX_ARRAY);
235    glEnable(GL_SCISSOR_TEST);
236    glShadeModel(GL_FLAT);
237    glDisable(GL_DITHER);
238    glDisable(GL_CULL_FACE);
239
240    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
241    const uint16_t g1 = pack565(0x17,0x2f,0x17);
242    const uint16_t textureData[4] = { g0, g1, g1, g0 };
243    glGenTextures(1, &mWormholeTexName);
244    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
245    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
246    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
247    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
248    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
249    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
250            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
251
252    glViewport(0, 0, w, h);
253    glMatrixMode(GL_PROJECTION);
254    glLoadIdentity();
255    glOrthof(0, w, h, 0, 0, 1);
256
257    mReadyToRunBarrier.open();
258
259    /*
260     *  We're now ready to accept clients...
261     */
262
263    // start boot animation
264    property_set("ctl.start", "bootanim");
265
266    return NO_ERROR;
267}
268
269// ----------------------------------------------------------------------------
270#if 0
271#pragma mark -
272#pragma mark Events Handler
273#endif
274
275void SurfaceFlinger::waitForEvent()
276{
277    while (true) {
278        nsecs_t timeout = -1;
279        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
280        if (UNLIKELY(isFrozen())) {
281            // wait 5 seconds
282            const nsecs_t now = systemTime();
283            if (mFreezeDisplayTime == 0) {
284                mFreezeDisplayTime = now;
285            }
286            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
287            timeout = waitTime>0 ? waitTime : 0;
288        }
289
290        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
291
292        // see if we timed out
293        if (isFrozen()) {
294            const nsecs_t now = systemTime();
295            nsecs_t frozenTime = (now - mFreezeDisplayTime);
296            if (frozenTime >= freezeDisplayTimeout) {
297                // we timed out and are still frozen
298                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
299                        mFreezeDisplay, mFreezeCount);
300                mFreezeDisplayTime = 0;
301                mFreezeCount = 0;
302                mFreezeDisplay = false;
303            }
304        }
305
306        if (msg != 0) {
307            switch (msg->what) {
308                case MessageQueue::INVALIDATE:
309                    // invalidate message, just return to the main loop
310                    return;
311            }
312        }
313    }
314}
315
316void SurfaceFlinger::signalEvent() {
317    mEventQueue.invalidate();
318}
319
320bool SurfaceFlinger::authenticateSurface(const sp<ISurface>& surface) const {
321    Mutex::Autolock _l(mStateLock);
322    sp<IBinder> surfBinder(surface->asBinder());
323
324    // Check the visible layer list for the ISurface
325    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
326    size_t count = currentLayers.size();
327    for (size_t i=0 ; i<count ; i++) {
328        const sp<LayerBase>& layer(currentLayers[i]);
329        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
330        if (lbc != NULL && lbc->getSurfaceBinder() == surfBinder) {
331            return true;
332        }
333    }
334
335    // Check the layers in the purgatory.  This check is here so that if a
336    // Surface gets destroyed before all the clients are done using it, the
337    // error will not be reported as "surface XYZ is not authenticated", but
338    // will instead fail later on when the client tries to use the surface,
339    // which should be reported as "surface XYZ returned an -ENODEV".  The
340    // purgatorized layers are no less authentic than the visible ones, so this
341    // should not cause any harm.
342    size_t purgatorySize =  mLayerPurgatory.size();
343    for (size_t i=0 ; i<purgatorySize ; i++) {
344        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
345        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
346        if (lbc != NULL && lbc->getSurfaceBinder() == surfBinder) {
347            return true;
348        }
349    }
350
351    return false;
352}
353
354status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
355        nsecs_t reltime, uint32_t flags)
356{
357    return mEventQueue.postMessage(msg, reltime, flags);
358}
359
360status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
361        nsecs_t reltime, uint32_t flags)
362{
363    status_t res = mEventQueue.postMessage(msg, reltime, flags);
364    if (res == NO_ERROR) {
365        msg->wait();
366    }
367    return res;
368}
369
370// ----------------------------------------------------------------------------
371#if 0
372#pragma mark -
373#pragma mark Main loop
374#endif
375
376bool SurfaceFlinger::threadLoop()
377{
378    waitForEvent();
379
380    // call Layer's destructor
381    handleDestroyLayers();
382
383    // check for transactions
384    if (UNLIKELY(mConsoleSignals)) {
385        handleConsoleEvents();
386    }
387
388    if (LIKELY(mTransactionCount == 0)) {
389        // if we're in a global transaction, don't do anything.
390        const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
391        uint32_t transactionFlags = peekTransactionFlags(mask);
392        if (LIKELY(transactionFlags)) {
393            handleTransaction(transactionFlags);
394        }
395    }
396
397    // post surfaces (if needed)
398    handlePageFlip();
399
400    if (UNLIKELY(mHwWorkListDirty)) {
401        // build the h/w work list
402        handleWorkList();
403    }
404
405    const DisplayHardware& hw(graphicPlane(0).displayHardware());
406    if (LIKELY(hw.canDraw() && !isFrozen())) {
407        // repaint the framebuffer (if needed)
408
409        const int index = hw.getCurrentBufferIndex();
410        GraphicLog& logger(GraphicLog::getInstance());
411
412        logger.log(GraphicLog::SF_REPAINT, index);
413        handleRepaint();
414
415        // inform the h/w that we're done compositing
416        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
417        hw.compositionComplete();
418
419        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
420        postFramebuffer();
421
422        logger.log(GraphicLog::SF_REPAINT_DONE, index);
423    } else {
424        // pretend we did the post
425        hw.compositionComplete();
426        usleep(16667); // 60 fps period
427    }
428    return true;
429}
430
431void SurfaceFlinger::postFramebuffer()
432{
433    if (!mInvalidRegion.isEmpty()) {
434        const DisplayHardware& hw(graphicPlane(0).displayHardware());
435        const nsecs_t now = systemTime();
436        mDebugInSwapBuffers = now;
437        hw.flip(mInvalidRegion);
438        mLastSwapBufferTime = systemTime() - now;
439        mDebugInSwapBuffers = 0;
440        mInvalidRegion.clear();
441    }
442}
443
444void SurfaceFlinger::handleConsoleEvents()
445{
446    // something to do with the console
447    const DisplayHardware& hw = graphicPlane(0).displayHardware();
448
449    int what = android_atomic_and(0, &mConsoleSignals);
450    if (what & eConsoleAcquired) {
451        hw.acquireScreen();
452        // this is a temporary work-around, eventually this should be called
453        // by the power-manager
454        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
455    }
456
457    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
458        // We got the release signal before the acquire signal
459        mDeferReleaseConsole = false;
460        hw.releaseScreen();
461    }
462
463    if (what & eConsoleReleased) {
464        if (hw.isScreenAcquired()) {
465            hw.releaseScreen();
466        } else {
467            mDeferReleaseConsole = true;
468        }
469    }
470
471    mDirtyRegion.set(hw.bounds());
472}
473
474void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
475{
476    Mutex::Autolock _l(mStateLock);
477    const nsecs_t now = systemTime();
478    mDebugInTransaction = now;
479
480    // Here we're guaranteed that some transaction flags are set
481    // so we can call handleTransactionLocked() unconditionally.
482    // We call getTransactionFlags(), which will also clear the flags,
483    // with mStateLock held to guarantee that mCurrentState won't change
484    // until the transaction is committed.
485
486    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
487    transactionFlags = getTransactionFlags(mask);
488    handleTransactionLocked(transactionFlags);
489
490    mLastTransactionTime = systemTime() - now;
491    mDebugInTransaction = 0;
492    invalidateHwcGeometry();
493    // here the transaction has been committed
494}
495
496void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
497{
498    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
499    const size_t count = currentLayers.size();
500
501    /*
502     * Traversal of the children
503     * (perform the transaction for each of them if needed)
504     */
505
506    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
507    if (layersNeedTransaction) {
508        for (size_t i=0 ; i<count ; i++) {
509            const sp<LayerBase>& layer = currentLayers[i];
510            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
511            if (!trFlags) continue;
512
513            const uint32_t flags = layer->doTransaction(0);
514            if (flags & Layer::eVisibleRegion)
515                mVisibleRegionsDirty = true;
516        }
517    }
518
519    /*
520     * Perform our own transaction if needed
521     */
522
523    if (transactionFlags & eTransactionNeeded) {
524        if (mCurrentState.orientation != mDrawingState.orientation) {
525            // the orientation has changed, recompute all visible regions
526            // and invalidate everything.
527
528            const int dpy = 0;
529            const int orientation = mCurrentState.orientation;
530            const uint32_t type = mCurrentState.orientationType;
531            GraphicPlane& plane(graphicPlane(dpy));
532            plane.setOrientation(orientation);
533
534            // update the shared control block
535            const DisplayHardware& hw(plane.displayHardware());
536            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
537            dcblk->orientation = orientation;
538            dcblk->w = plane.getWidth();
539            dcblk->h = plane.getHeight();
540
541            mVisibleRegionsDirty = true;
542            mDirtyRegion.set(hw.bounds());
543        }
544
545        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
546            // freezing or unfreezing the display -> trigger animation if needed
547            mFreezeDisplay = mCurrentState.freezeDisplay;
548            if (mFreezeDisplay)
549                 mFreezeDisplayTime = 0;
550        }
551
552        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
553            // layers have been added
554            mVisibleRegionsDirty = true;
555        }
556
557        // some layers might have been removed, so
558        // we need to update the regions they're exposing.
559        if (mLayersRemoved) {
560            mLayersRemoved = false;
561            mVisibleRegionsDirty = true;
562            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
563            const size_t count = previousLayers.size();
564            for (size_t i=0 ; i<count ; i++) {
565                const sp<LayerBase>& layer(previousLayers[i]);
566                if (currentLayers.indexOf( layer ) < 0) {
567                    // this layer is not visible anymore
568                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
569                }
570            }
571        }
572    }
573
574    commitTransaction();
575}
576
577void SurfaceFlinger::destroyLayer(LayerBase const* layer)
578{
579    Mutex::Autolock _l(mDestroyedLayerLock);
580    mDestroyedLayers.add(layer);
581    signalEvent();
582}
583
584void SurfaceFlinger::handleDestroyLayers()
585{
586    Vector<LayerBase const *> destroyedLayers;
587
588    { // scope for the lock
589        Mutex::Autolock _l(mDestroyedLayerLock);
590        destroyedLayers = mDestroyedLayers;
591        mDestroyedLayers.clear();
592    }
593
594    // call destructors without a lock held
595    const size_t count = destroyedLayers.size();
596    for (size_t i=0 ; i<count ; i++) {
597        //LOGD("destroying %s", destroyedLayers[i]->getName().string());
598        delete destroyedLayers[i];
599    }
600}
601
602sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
603{
604    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
605}
606
607void SurfaceFlinger::computeVisibleRegions(
608    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
609{
610    const GraphicPlane& plane(graphicPlane(0));
611    const Transform& planeTransform(plane.transform());
612    const DisplayHardware& hw(plane.displayHardware());
613    const Region screenRegion(hw.bounds());
614
615    Region aboveOpaqueLayers;
616    Region aboveCoveredLayers;
617    Region dirty;
618
619    bool secureFrameBuffer = false;
620
621    size_t i = currentLayers.size();
622    while (i--) {
623        const sp<LayerBase>& layer = currentLayers[i];
624        layer->validateVisibility(planeTransform);
625
626        // start with the whole surface at its current location
627        const Layer::State& s(layer->drawingState());
628
629        /*
630         * opaqueRegion: area of a surface that is fully opaque.
631         */
632        Region opaqueRegion;
633
634        /*
635         * visibleRegion: area of a surface that is visible on screen
636         * and not fully transparent. This is essentially the layer's
637         * footprint minus the opaque regions above it.
638         * Areas covered by a translucent surface are considered visible.
639         */
640        Region visibleRegion;
641
642        /*
643         * coveredRegion: area of a surface that is covered by all
644         * visible regions above it (which includes the translucent areas).
645         */
646        Region coveredRegion;
647
648
649        // handle hidden surfaces by setting the visible region to empty
650        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
651            const bool translucent = !layer->isOpaque();
652            const Rect bounds(layer->visibleBounds());
653            visibleRegion.set(bounds);
654            visibleRegion.andSelf(screenRegion);
655            if (!visibleRegion.isEmpty()) {
656                // Remove the transparent area from the visible region
657                if (translucent) {
658                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
659                }
660
661                // compute the opaque region
662                const int32_t layerOrientation = layer->getOrientation();
663                if (s.alpha==255 && !translucent &&
664                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
665                    // the opaque region is the layer's footprint
666                    opaqueRegion = visibleRegion;
667                }
668            }
669        }
670
671        // Clip the covered region to the visible region
672        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
673
674        // Update aboveCoveredLayers for next (lower) layer
675        aboveCoveredLayers.orSelf(visibleRegion);
676
677        // subtract the opaque region covered by the layers above us
678        visibleRegion.subtractSelf(aboveOpaqueLayers);
679
680        // compute this layer's dirty region
681        if (layer->contentDirty) {
682            // we need to invalidate the whole region
683            dirty = visibleRegion;
684            // as well, as the old visible region
685            dirty.orSelf(layer->visibleRegionScreen);
686            layer->contentDirty = false;
687        } else {
688            /* compute the exposed region:
689             *   the exposed region consists of two components:
690             *   1) what's VISIBLE now and was COVERED before
691             *   2) what's EXPOSED now less what was EXPOSED before
692             *
693             * note that (1) is conservative, we start with the whole
694             * visible region but only keep what used to be covered by
695             * something -- which mean it may have been exposed.
696             *
697             * (2) handles areas that were not covered by anything but got
698             * exposed because of a resize.
699             */
700            const Region newExposed = visibleRegion - coveredRegion;
701            const Region oldVisibleRegion = layer->visibleRegionScreen;
702            const Region oldCoveredRegion = layer->coveredRegionScreen;
703            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
704            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
705        }
706        dirty.subtractSelf(aboveOpaqueLayers);
707
708        // accumulate to the screen dirty region
709        dirtyRegion.orSelf(dirty);
710
711        // Update aboveOpaqueLayers for next (lower) layer
712        aboveOpaqueLayers.orSelf(opaqueRegion);
713
714        // Store the visible region is screen space
715        layer->setVisibleRegion(visibleRegion);
716        layer->setCoveredRegion(coveredRegion);
717
718        // If a secure layer is partially visible, lock-down the screen!
719        if (layer->isSecure() && !visibleRegion.isEmpty()) {
720            secureFrameBuffer = true;
721        }
722    }
723
724    // invalidate the areas where a layer was removed
725    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
726    mDirtyRegionRemovedLayer.clear();
727
728    mSecureFrameBuffer = secureFrameBuffer;
729    opaqueRegion = aboveOpaqueLayers;
730}
731
732
733void SurfaceFlinger::commitTransaction()
734{
735    mDrawingState = mCurrentState;
736    mResizeTransationPending = false;
737    mTransactionCV.broadcast();
738}
739
740void SurfaceFlinger::handlePageFlip()
741{
742    bool visibleRegions = mVisibleRegionsDirty;
743    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
744    visibleRegions |= lockPageFlip(currentLayers);
745
746        const DisplayHardware& hw = graphicPlane(0).displayHardware();
747        const Region screenRegion(hw.bounds());
748        if (visibleRegions) {
749            Region opaqueRegion;
750            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
751
752            /*
753             *  rebuild the visible layer list
754             */
755            const size_t count = currentLayers.size();
756            mVisibleLayersSortedByZ.clear();
757            mVisibleLayersSortedByZ.setCapacity(count);
758            for (size_t i=0 ; i<count ; i++) {
759                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
760                    mVisibleLayersSortedByZ.add(currentLayers[i]);
761            }
762
763            mWormholeRegion = screenRegion.subtract(opaqueRegion);
764            mVisibleRegionsDirty = false;
765            invalidateHwcGeometry();
766        }
767
768    unlockPageFlip(currentLayers);
769    mDirtyRegion.andSelf(screenRegion);
770}
771
772void SurfaceFlinger::invalidateHwcGeometry()
773{
774    mHwWorkListDirty = true;
775}
776
777bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
778{
779    bool recomputeVisibleRegions = false;
780    size_t count = currentLayers.size();
781    sp<LayerBase> const* layers = currentLayers.array();
782    for (size_t i=0 ; i<count ; i++) {
783        const sp<LayerBase>& layer(layers[i]);
784        layer->lockPageFlip(recomputeVisibleRegions);
785    }
786    return recomputeVisibleRegions;
787}
788
789void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
790{
791    const GraphicPlane& plane(graphicPlane(0));
792    const Transform& planeTransform(plane.transform());
793    size_t count = currentLayers.size();
794    sp<LayerBase> const* layers = currentLayers.array();
795    for (size_t i=0 ; i<count ; i++) {
796        const sp<LayerBase>& layer(layers[i]);
797        layer->unlockPageFlip(planeTransform, mDirtyRegion);
798    }
799}
800
801void SurfaceFlinger::handleWorkList()
802{
803    mHwWorkListDirty = false;
804    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
805    if (hwc.initCheck() == NO_ERROR) {
806        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
807        const size_t count = currentLayers.size();
808        hwc.createWorkList(count);
809        hwc_layer_t* const cur(hwc.getLayers());
810        for (size_t i=0 ; cur && i<count ; i++) {
811            currentLayers[i]->setGeometry(&cur[i]);
812            if (mDebugDisableHWC) {
813                cur[i].compositionType = HWC_FRAMEBUFFER;
814                cur[i].flags |= HWC_SKIP_LAYER;
815            }
816        }
817    }
818}
819
820void SurfaceFlinger::handleRepaint()
821{
822    // compute the invalid region
823    mInvalidRegion.orSelf(mDirtyRegion);
824
825    if (UNLIKELY(mDebugRegion)) {
826        debugFlashRegions();
827    }
828
829    // set the frame buffer
830    const DisplayHardware& hw(graphicPlane(0).displayHardware());
831    glMatrixMode(GL_MODELVIEW);
832    glLoadIdentity();
833
834    uint32_t flags = hw.getFlags();
835    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
836        (flags & DisplayHardware::BUFFER_PRESERVED))
837    {
838        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
839        // takes a rectangle, we must make sure to update that whole
840        // rectangle in that case
841        if (flags & DisplayHardware::SWAP_RECTANGLE) {
842            // TODO: we really should be able to pass a region to
843            // SWAP_RECTANGLE so that we don't have to redraw all this.
844            mDirtyRegion.set(mInvalidRegion.bounds());
845        } else {
846            // in the BUFFER_PRESERVED case, obviously, we can update only
847            // what's needed and nothing more.
848            // NOTE: this is NOT a common case, as preserving the backbuffer
849            // is costly and usually involves copying the whole update back.
850        }
851    } else {
852        if (flags & DisplayHardware::PARTIAL_UPDATES) {
853            // We need to redraw the rectangle that will be updated
854            // (pushed to the framebuffer).
855            // This is needed because PARTIAL_UPDATES only takes one
856            // rectangle instead of a region (see DisplayHardware::flip())
857            mDirtyRegion.set(mInvalidRegion.bounds());
858        } else {
859            // we need to redraw everything (the whole screen)
860            mDirtyRegion.set(hw.bounds());
861            mInvalidRegion = mDirtyRegion;
862        }
863    }
864
865    // compose all surfaces
866    composeSurfaces(mDirtyRegion);
867
868    // clear the dirty regions
869    mDirtyRegion.clear();
870}
871
872void SurfaceFlinger::composeSurfaces(const Region& dirty)
873{
874    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
875        // should never happen unless the window manager has a bug
876        // draw something...
877        drawWormhole();
878    }
879
880    status_t err = NO_ERROR;
881    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
882    size_t count = layers.size();
883
884    const DisplayHardware& hw(graphicPlane(0).displayHardware());
885    HWComposer& hwc(hw.getHwComposer());
886    hwc_layer_t* const cur(hwc.getLayers());
887
888    LOGE_IF(cur && hwc.getNumLayers() != count,
889            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
890            hwc.getNumLayers(), count);
891
892    // just to be extra-safe, use the smallest count
893    if (hwc.initCheck() == NO_ERROR) {
894        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
895    }
896
897    /*
898     *  update the per-frame h/w composer data for each layer
899     *  and build the transparent region of the FB
900     */
901    Region transparent;
902    if (cur) {
903        for (size_t i=0 ; i<count ; i++) {
904            const sp<LayerBase>& layer(layers[i]);
905            layer->setPerFrameData(&cur[i]);
906        }
907        err = hwc.prepare();
908        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
909
910        if (err == NO_ERROR) {
911            for (size_t i=0 ; i<count ; i++) {
912                if (cur[i].hints & HWC_HINT_CLEAR_FB) {
913                    const sp<LayerBase>& layer(layers[i]);
914                    if (layer->isOpaque()) {
915                        transparent.orSelf(layer->visibleRegionScreen);
916                    }
917                }
918            }
919
920            /*
921             *  clear the area of the FB that need to be transparent
922             */
923            transparent.andSelf(dirty);
924            if (!transparent.isEmpty()) {
925                glClearColor(0,0,0,0);
926                Region::const_iterator it = transparent.begin();
927                Region::const_iterator const end = transparent.end();
928                const int32_t height = hw.getHeight();
929                while (it != end) {
930                    const Rect& r(*it++);
931                    const GLint sy = height - (r.top + r.height());
932                    glScissor(r.left, sy, r.width(), r.height());
933                    glClear(GL_COLOR_BUFFER_BIT);
934                }
935            }
936        }
937    }
938
939
940    /*
941     * and then, render the layers targeted at the framebuffer
942     */
943    for (size_t i=0 ; i<count ; i++) {
944        if (cur) {
945            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
946                !(cur[i].flags & HWC_SKIP_LAYER)) {
947                // skip layers handled by the HAL
948                continue;
949            }
950        }
951
952        const sp<LayerBase>& layer(layers[i]);
953        const Region clip(dirty.intersect(layer->visibleRegionScreen));
954        if (!clip.isEmpty()) {
955            layer->draw(clip);
956        }
957    }
958}
959
960void SurfaceFlinger::debugFlashRegions()
961{
962    const DisplayHardware& hw(graphicPlane(0).displayHardware());
963    const uint32_t flags = hw.getFlags();
964
965    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
966            (flags & DisplayHardware::BUFFER_PRESERVED))) {
967        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
968                mDirtyRegion.bounds() : hw.bounds());
969        composeSurfaces(repaint);
970    }
971
972    glDisable(GL_BLEND);
973    glDisable(GL_DITHER);
974    glDisable(GL_SCISSOR_TEST);
975
976    static int toggle = 0;
977    toggle = 1 - toggle;
978    if (toggle) {
979        glColor4f(1, 0, 1, 1);
980    } else {
981        glColor4f(1, 1, 0, 1);
982    }
983
984    Region::const_iterator it = mDirtyRegion.begin();
985    Region::const_iterator const end = mDirtyRegion.end();
986    while (it != end) {
987        const Rect& r = *it++;
988        GLfloat vertices[][2] = {
989                { r.left,  r.top },
990                { r.left,  r.bottom },
991                { r.right, r.bottom },
992                { r.right, r.top }
993        };
994        glVertexPointer(2, GL_FLOAT, 0, vertices);
995        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
996    }
997
998    if (mInvalidRegion.isEmpty()) {
999        mDirtyRegion.dump("mDirtyRegion");
1000        mInvalidRegion.dump("mInvalidRegion");
1001    }
1002    hw.flip(mInvalidRegion);
1003
1004    if (mDebugRegion > 1)
1005        usleep(mDebugRegion * 1000);
1006
1007    glEnable(GL_SCISSOR_TEST);
1008    //mDirtyRegion.dump("mDirtyRegion");
1009}
1010
1011void SurfaceFlinger::drawWormhole() const
1012{
1013    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1014    if (region.isEmpty())
1015        return;
1016
1017    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1018    const int32_t width = hw.getWidth();
1019    const int32_t height = hw.getHeight();
1020
1021    glDisable(GL_BLEND);
1022    glDisable(GL_DITHER);
1023
1024    if (LIKELY(!mDebugBackground)) {
1025        glClearColor(0,0,0,0);
1026        Region::const_iterator it = region.begin();
1027        Region::const_iterator const end = region.end();
1028        while (it != end) {
1029            const Rect& r = *it++;
1030            const GLint sy = height - (r.top + r.height());
1031            glScissor(r.left, sy, r.width(), r.height());
1032            glClear(GL_COLOR_BUFFER_BIT);
1033        }
1034    } else {
1035        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1036                { width, height }, { 0, height }  };
1037        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1038        glVertexPointer(2, GL_SHORT, 0, vertices);
1039        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1040        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1041#if defined(GL_OES_EGL_image_external)
1042        if (GLExtensions::getInstance().haveTextureExternal()) {
1043            glDisable(GL_TEXTURE_EXTERNAL_OES);
1044        }
1045#endif
1046        glEnable(GL_TEXTURE_2D);
1047        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1048        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1049        glMatrixMode(GL_TEXTURE);
1050        glLoadIdentity();
1051        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1052        Region::const_iterator it = region.begin();
1053        Region::const_iterator const end = region.end();
1054        while (it != end) {
1055            const Rect& r = *it++;
1056            const GLint sy = height - (r.top + r.height());
1057            glScissor(r.left, sy, r.width(), r.height());
1058            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1059        }
1060        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1061        glDisable(GL_TEXTURE_2D);
1062        glLoadIdentity();
1063        glMatrixMode(GL_MODELVIEW);
1064    }
1065}
1066
1067void SurfaceFlinger::debugShowFPS() const
1068{
1069    static int mFrameCount;
1070    static int mLastFrameCount = 0;
1071    static nsecs_t mLastFpsTime = 0;
1072    static float mFps = 0;
1073    mFrameCount++;
1074    nsecs_t now = systemTime();
1075    nsecs_t diff = now - mLastFpsTime;
1076    if (diff > ms2ns(250)) {
1077        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1078        mLastFpsTime = now;
1079        mLastFrameCount = mFrameCount;
1080    }
1081    // XXX: mFPS has the value we want
1082 }
1083
1084status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1085{
1086    Mutex::Autolock _l(mStateLock);
1087    addLayer_l(layer);
1088    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1089    return NO_ERROR;
1090}
1091
1092status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1093{
1094    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1095    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1096}
1097
1098ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1099        const sp<LayerBaseClient>& lbc)
1100{
1101    // attach this layer to the client
1102    size_t name = client->attachLayer(lbc);
1103
1104    Mutex::Autolock _l(mStateLock);
1105
1106    // add this layer to the current state list
1107    addLayer_l(lbc);
1108
1109    return ssize_t(name);
1110}
1111
1112status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1113{
1114    Mutex::Autolock _l(mStateLock);
1115    status_t err = purgatorizeLayer_l(layer);
1116    if (err == NO_ERROR)
1117        setTransactionFlags(eTransactionNeeded);
1118    return err;
1119}
1120
1121status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1122{
1123    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1124    if (lbc != 0) {
1125        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1126    }
1127    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1128    if (index >= 0) {
1129        mLayersRemoved = true;
1130        return NO_ERROR;
1131    }
1132    return status_t(index);
1133}
1134
1135status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1136{
1137    // First add the layer to the purgatory list, which makes sure it won't
1138    // go away, then remove it from the main list (through a transaction).
1139    ssize_t err = removeLayer_l(layerBase);
1140    if (err >= 0) {
1141        mLayerPurgatory.add(layerBase);
1142    }
1143
1144    layerBase->onRemoved();
1145
1146    // it's possible that we don't find a layer, because it might
1147    // have been destroyed already -- this is not technically an error
1148    // from the user because there is a race between Client::destroySurface(),
1149    // ~Client() and ~ISurface().
1150    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1151}
1152
1153status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1154{
1155    layer->forceVisibilityTransaction();
1156    setTransactionFlags(eTraversalNeeded);
1157    return NO_ERROR;
1158}
1159
1160uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1161{
1162    return android_atomic_release_load(&mTransactionFlags);
1163}
1164
1165uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1166{
1167    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1168}
1169
1170uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1171{
1172    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1173    if ((old & flags)==0) { // wake the server up
1174        signalEvent();
1175    }
1176    return old;
1177}
1178
1179void SurfaceFlinger::openGlobalTransaction()
1180{
1181    android_atomic_inc(&mTransactionCount);
1182}
1183
1184void SurfaceFlinger::closeGlobalTransaction()
1185{
1186    if (android_atomic_dec(&mTransactionCount) == 1) {
1187        signalEvent();
1188
1189        // if there is a transaction with a resize, wait for it to
1190        // take effect before returning.
1191        Mutex::Autolock _l(mStateLock);
1192        while (mResizeTransationPending) {
1193            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1194            if (CC_UNLIKELY(err != NO_ERROR)) {
1195                // just in case something goes wrong in SF, return to the
1196                // called after a few seconds.
1197                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1198                mResizeTransationPending = false;
1199                break;
1200            }
1201        }
1202    }
1203}
1204
1205status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1206{
1207    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1208        return BAD_VALUE;
1209
1210    Mutex::Autolock _l(mStateLock);
1211    mCurrentState.freezeDisplay = 1;
1212    setTransactionFlags(eTransactionNeeded);
1213
1214    // flags is intended to communicate some sort of animation behavior
1215    // (for instance fading)
1216    return NO_ERROR;
1217}
1218
1219status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1220{
1221    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1222        return BAD_VALUE;
1223
1224    Mutex::Autolock _l(mStateLock);
1225    mCurrentState.freezeDisplay = 0;
1226    setTransactionFlags(eTransactionNeeded);
1227
1228    // flags is intended to communicate some sort of animation behavior
1229    // (for instance fading)
1230    return NO_ERROR;
1231}
1232
1233int SurfaceFlinger::setOrientation(DisplayID dpy,
1234        int orientation, uint32_t flags)
1235{
1236    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1237        return BAD_VALUE;
1238
1239    Mutex::Autolock _l(mStateLock);
1240    if (mCurrentState.orientation != orientation) {
1241        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1242            mCurrentState.orientationType = flags;
1243            mCurrentState.orientation = orientation;
1244            setTransactionFlags(eTransactionNeeded);
1245            mTransactionCV.wait(mStateLock);
1246        } else {
1247            orientation = BAD_VALUE;
1248        }
1249    }
1250    return orientation;
1251}
1252
1253sp<ISurface> SurfaceFlinger::createSurface(
1254        ISurfaceComposerClient::surface_data_t* params,
1255        const String8& name,
1256        const sp<Client>& client,
1257        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1258        uint32_t flags)
1259{
1260    sp<LayerBaseClient> layer;
1261    sp<ISurface> surfaceHandle;
1262
1263    if (int32_t(w|h) < 0) {
1264        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1265                int(w), int(h));
1266        return surfaceHandle;
1267    }
1268
1269    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1270    sp<Layer> normalLayer;
1271    switch (flags & eFXSurfaceMask) {
1272        case eFXSurfaceNormal:
1273            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1274            layer = normalLayer;
1275            break;
1276        case eFXSurfaceBlur:
1277            // for now we treat Blur as Dim, until we can implement it
1278            // efficiently.
1279        case eFXSurfaceDim:
1280            layer = createDimSurface(client, d, w, h, flags);
1281            break;
1282    }
1283
1284    if (layer != 0) {
1285        layer->initStates(w, h, flags);
1286        layer->setName(name);
1287        ssize_t token = addClientLayer(client, layer);
1288
1289        surfaceHandle = layer->getSurface();
1290        if (surfaceHandle != 0) {
1291            params->token = token;
1292            params->identity = layer->getIdentity();
1293            params->width = w;
1294            params->height = h;
1295            params->format = format;
1296            if (normalLayer != 0) {
1297                Mutex::Autolock _l(mStateLock);
1298                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1299            }
1300        }
1301
1302        setTransactionFlags(eTransactionNeeded);
1303    }
1304
1305    return surfaceHandle;
1306}
1307
1308sp<Layer> SurfaceFlinger::createNormalSurface(
1309        const sp<Client>& client, DisplayID display,
1310        uint32_t w, uint32_t h, uint32_t flags,
1311        PixelFormat& format)
1312{
1313    // initialize the surfaces
1314    switch (format) { // TODO: take h/w into account
1315    case PIXEL_FORMAT_TRANSPARENT:
1316    case PIXEL_FORMAT_TRANSLUCENT:
1317        format = PIXEL_FORMAT_RGBA_8888;
1318        break;
1319    case PIXEL_FORMAT_OPAQUE:
1320#ifdef NO_RGBX_8888
1321        format = PIXEL_FORMAT_RGB_565;
1322#else
1323        format = PIXEL_FORMAT_RGBX_8888;
1324#endif
1325        break;
1326    }
1327
1328#ifdef NO_RGBX_8888
1329    if (format == PIXEL_FORMAT_RGBX_8888)
1330        format = PIXEL_FORMAT_RGBA_8888;
1331#endif
1332
1333    sp<Layer> layer = new Layer(this, display, client);
1334    status_t err = layer->setBuffers(w, h, format, flags);
1335    if (LIKELY(err != NO_ERROR)) {
1336        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1337        layer.clear();
1338    }
1339    return layer;
1340}
1341
1342sp<LayerDim> SurfaceFlinger::createDimSurface(
1343        const sp<Client>& client, DisplayID display,
1344        uint32_t w, uint32_t h, uint32_t flags)
1345{
1346    sp<LayerDim> layer = new LayerDim(this, display, client);
1347    layer->initStates(w, h, flags);
1348    return layer;
1349}
1350
1351status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1352{
1353    /*
1354     * called by the window manager, when a surface should be marked for
1355     * destruction.
1356     *
1357     * The surface is removed from the current and drawing lists, but placed
1358     * in the purgatory queue, so it's not destroyed right-away (we need
1359     * to wait for all client's references to go away first).
1360     */
1361
1362    status_t err = NAME_NOT_FOUND;
1363    Mutex::Autolock _l(mStateLock);
1364    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1365    if (layer != 0) {
1366        err = purgatorizeLayer_l(layer);
1367        if (err == NO_ERROR) {
1368            setTransactionFlags(eTransactionNeeded);
1369        }
1370    }
1371    return err;
1372}
1373
1374status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1375{
1376    // called by ~ISurface() when all references are gone
1377    status_t err = NO_ERROR;
1378    sp<LayerBaseClient> l(layer.promote());
1379    if (l != NULL) {
1380        Mutex::Autolock _l(mStateLock);
1381        err = removeLayer_l(l);
1382        if (err == NAME_NOT_FOUND) {
1383            // The surface wasn't in the current list, which means it was
1384            // removed already, which means it is in the purgatory,
1385            // and need to be removed from there.
1386            ssize_t idx = mLayerPurgatory.remove(l);
1387            LOGE_IF(idx < 0,
1388                    "layer=%p is not in the purgatory list", l.get());
1389        }
1390        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1391                "error removing layer=%p (%s)", l.get(), strerror(-err));
1392    }
1393    return err;
1394}
1395
1396status_t SurfaceFlinger::setClientState(
1397        const sp<Client>& client,
1398        int32_t count,
1399        const layer_state_t* states)
1400{
1401    Mutex::Autolock _l(mStateLock);
1402    uint32_t flags = 0;
1403    for (int i=0 ; i<count ; i++) {
1404        const layer_state_t& s(states[i]);
1405        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1406        if (layer != 0) {
1407            const uint32_t what = s.what;
1408            if (what & ePositionChanged) {
1409                if (layer->setPosition(s.x, s.y))
1410                    flags |= eTraversalNeeded;
1411            }
1412            if (what & eLayerChanged) {
1413                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1414                if (layer->setLayer(s.z)) {
1415                    mCurrentState.layersSortedByZ.removeAt(idx);
1416                    mCurrentState.layersSortedByZ.add(layer);
1417                    // we need traversal (state changed)
1418                    // AND transaction (list changed)
1419                    flags |= eTransactionNeeded|eTraversalNeeded;
1420                }
1421            }
1422            if (what & eSizeChanged) {
1423                if (layer->setSize(s.w, s.h)) {
1424                    flags |= eTraversalNeeded;
1425                    mResizeTransationPending = true;
1426                }
1427            }
1428            if (what & eAlphaChanged) {
1429                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1430                    flags |= eTraversalNeeded;
1431            }
1432            if (what & eMatrixChanged) {
1433                if (layer->setMatrix(s.matrix))
1434                    flags |= eTraversalNeeded;
1435            }
1436            if (what & eTransparentRegionChanged) {
1437                if (layer->setTransparentRegionHint(s.transparentRegion))
1438                    flags |= eTraversalNeeded;
1439            }
1440            if (what & eVisibilityChanged) {
1441                if (layer->setFlags(s.flags, s.mask))
1442                    flags |= eTraversalNeeded;
1443            }
1444        }
1445    }
1446    if (flags) {
1447        setTransactionFlags(flags);
1448    }
1449    return NO_ERROR;
1450}
1451
1452void SurfaceFlinger::screenReleased(int dpy)
1453{
1454    // this may be called by a signal handler, we can't do too much in here
1455    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1456    signalEvent();
1457}
1458
1459void SurfaceFlinger::screenAcquired(int dpy)
1460{
1461    // this may be called by a signal handler, we can't do too much in here
1462    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1463    signalEvent();
1464}
1465
1466status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1467{
1468    const size_t SIZE = 4096;
1469    char buffer[SIZE];
1470    String8 result;
1471
1472    if (!PermissionCache::checkCallingPermission(sDump)) {
1473        snprintf(buffer, SIZE, "Permission Denial: "
1474                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1475                IPCThreadState::self()->getCallingPid(),
1476                IPCThreadState::self()->getCallingUid());
1477        result.append(buffer);
1478    } else {
1479
1480        // figure out if we're stuck somewhere
1481        const nsecs_t now = systemTime();
1482        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1483        const nsecs_t inTransaction(mDebugInTransaction);
1484        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1485        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1486
1487        // Try to get the main lock, but don't insist if we can't
1488        // (this would indicate SF is stuck, but we want to be able to
1489        // print something in dumpsys).
1490        int retry = 3;
1491        while (mStateLock.tryLock()<0 && --retry>=0) {
1492            usleep(1000000);
1493        }
1494        const bool locked(retry >= 0);
1495        if (!locked) {
1496            snprintf(buffer, SIZE,
1497                    "SurfaceFlinger appears to be unresponsive, "
1498                    "dumping anyways (no locks held)\n");
1499            result.append(buffer);
1500        }
1501
1502        /*
1503         * Dump the visible layer list
1504         */
1505        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1506        const size_t count = currentLayers.size();
1507        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1508        result.append(buffer);
1509        for (size_t i=0 ; i<count ; i++) {
1510            const sp<LayerBase>& layer(currentLayers[i]);
1511            layer->dump(result, buffer, SIZE);
1512            const Layer::State& s(layer->drawingState());
1513            s.transparentRegion.dump(result, "transparentRegion");
1514            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1515            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1516        }
1517
1518        /*
1519         * Dump the layers in the purgatory
1520         */
1521
1522        const size_t purgatorySize =  mLayerPurgatory.size();
1523        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1524        result.append(buffer);
1525        for (size_t i=0 ; i<purgatorySize ; i++) {
1526            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1527            layer->shortDump(result, buffer, SIZE);
1528        }
1529
1530        /*
1531         * Dump SurfaceFlinger global state
1532         */
1533
1534        snprintf(buffer, SIZE, "SurfaceFlinger global state\n");
1535        result.append(buffer);
1536        mWormholeRegion.dump(result, "WormholeRegion");
1537        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1538        snprintf(buffer, SIZE,
1539                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1540                mFreezeDisplay?"yes":"no", mFreezeCount,
1541                mCurrentState.orientation, hw.canDraw());
1542        result.append(buffer);
1543        snprintf(buffer, SIZE,
1544                "  last eglSwapBuffers() time: %f us\n"
1545                "  last transaction time     : %f us\n",
1546                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1547        result.append(buffer);
1548
1549        if (inSwapBuffersDuration || !locked) {
1550            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1551                    inSwapBuffersDuration/1000.0);
1552            result.append(buffer);
1553        }
1554
1555        if (inTransactionDuration || !locked) {
1556            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1557                    inTransactionDuration/1000.0);
1558            result.append(buffer);
1559        }
1560
1561        /*
1562         * Dump HWComposer state
1563         */
1564        HWComposer& hwc(hw.getHwComposer());
1565        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1566                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1567                mDebugDisableHWC ? "disabled" : "enabled");
1568        result.append(buffer);
1569        hwc.dump(result, buffer, SIZE);
1570
1571        /*
1572         * Dump gralloc state
1573         */
1574        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1575        alloc.dump(result);
1576        hw.dump(result);
1577
1578        if (locked) {
1579            mStateLock.unlock();
1580        }
1581    }
1582    write(fd, result.string(), result.size());
1583    return NO_ERROR;
1584}
1585
1586status_t SurfaceFlinger::onTransact(
1587    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1588{
1589    switch (code) {
1590        case CREATE_CONNECTION:
1591        case OPEN_GLOBAL_TRANSACTION:
1592        case CLOSE_GLOBAL_TRANSACTION:
1593        case SET_ORIENTATION:
1594        case FREEZE_DISPLAY:
1595        case UNFREEZE_DISPLAY:
1596        case BOOT_FINISHED:
1597        case TURN_ELECTRON_BEAM_OFF:
1598        case TURN_ELECTRON_BEAM_ON:
1599        {
1600            // codes that require permission check
1601            IPCThreadState* ipc = IPCThreadState::self();
1602            const int pid = ipc->getCallingPid();
1603            const int uid = ipc->getCallingUid();
1604            if ((uid != AID_GRAPHICS) &&
1605                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1606                LOGE("Permission Denial: "
1607                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1608                return PERMISSION_DENIED;
1609            }
1610            break;
1611        }
1612        case CAPTURE_SCREEN:
1613        {
1614            // codes that require permission check
1615            IPCThreadState* ipc = IPCThreadState::self();
1616            const int pid = ipc->getCallingPid();
1617            const int uid = ipc->getCallingUid();
1618            if ((uid != AID_GRAPHICS) &&
1619                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1620                LOGE("Permission Denial: "
1621                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1622                return PERMISSION_DENIED;
1623            }
1624            break;
1625        }
1626    }
1627
1628    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1629    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1630        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1631        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1632            IPCThreadState* ipc = IPCThreadState::self();
1633            const int pid = ipc->getCallingPid();
1634            const int uid = ipc->getCallingUid();
1635            LOGE("Permission Denial: "
1636                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1637            return PERMISSION_DENIED;
1638        }
1639        int n;
1640        switch (code) {
1641            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1642            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1643                return NO_ERROR;
1644            case 1002:  // SHOW_UPDATES
1645                n = data.readInt32();
1646                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1647                return NO_ERROR;
1648            case 1003:  // SHOW_BACKGROUND
1649                n = data.readInt32();
1650                mDebugBackground = n ? 1 : 0;
1651                return NO_ERROR;
1652            case 1008:  // toggle use of hw composer
1653                n = data.readInt32();
1654                mDebugDisableHWC = n ? 1 : 0;
1655                invalidateHwcGeometry();
1656                // fall-through...
1657            case 1004:{ // repaint everything
1658                Mutex::Autolock _l(mStateLock);
1659                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1660                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1661                signalEvent();
1662                return NO_ERROR;
1663            }
1664            case 1005:{ // force transaction
1665                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1666                return NO_ERROR;
1667            }
1668            case 1006:{ // enable/disable GraphicLog
1669                int enabled = data.readInt32();
1670                GraphicLog::getInstance().setEnabled(enabled);
1671                return NO_ERROR;
1672            }
1673            case 1007: // set mFreezeCount
1674                mFreezeCount = data.readInt32();
1675                mFreezeDisplayTime = 0;
1676                return NO_ERROR;
1677            case 1010:  // interrogate.
1678                reply->writeInt32(0);
1679                reply->writeInt32(0);
1680                reply->writeInt32(mDebugRegion);
1681                reply->writeInt32(mDebugBackground);
1682                return NO_ERROR;
1683            case 1013: {
1684                Mutex::Autolock _l(mStateLock);
1685                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1686                reply->writeInt32(hw.getPageFlipCount());
1687            }
1688            return NO_ERROR;
1689        }
1690    }
1691    return err;
1692}
1693
1694// ---------------------------------------------------------------------------
1695
1696status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1697        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1698{
1699    if (!GLExtensions::getInstance().haveFramebufferObject())
1700        return INVALID_OPERATION;
1701
1702    // get screen geometry
1703    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1704    const uint32_t hw_w = hw.getWidth();
1705    const uint32_t hw_h = hw.getHeight();
1706    GLfloat u = 1;
1707    GLfloat v = 1;
1708
1709    // make sure to clear all GL error flags
1710    while ( glGetError() != GL_NO_ERROR ) ;
1711
1712    // create a FBO
1713    GLuint name, tname;
1714    glGenTextures(1, &tname);
1715    glBindTexture(GL_TEXTURE_2D, tname);
1716    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1717            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1718    if (glGetError() != GL_NO_ERROR) {
1719        while ( glGetError() != GL_NO_ERROR ) ;
1720        GLint tw = (2 << (31 - clz(hw_w)));
1721        GLint th = (2 << (31 - clz(hw_h)));
1722        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1723                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1724        u = GLfloat(hw_w) / tw;
1725        v = GLfloat(hw_h) / th;
1726    }
1727    glGenFramebuffersOES(1, &name);
1728    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1729    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1730            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1731
1732    // redraw the screen entirely...
1733    glClearColor(0,0,0,1);
1734    glClear(GL_COLOR_BUFFER_BIT);
1735    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1736    const size_t count = layers.size();
1737    for (size_t i=0 ; i<count ; ++i) {
1738        const sp<LayerBase>& layer(layers[i]);
1739        layer->drawForSreenShot();
1740    }
1741
1742    // back to main framebuffer
1743    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1744    glDisable(GL_SCISSOR_TEST);
1745    glDeleteFramebuffersOES(1, &name);
1746
1747    *textureName = tname;
1748    *uOut = u;
1749    *vOut = v;
1750    return NO_ERROR;
1751}
1752
1753// ---------------------------------------------------------------------------
1754
1755status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1756{
1757    status_t result = PERMISSION_DENIED;
1758
1759    if (!GLExtensions::getInstance().haveFramebufferObject())
1760        return INVALID_OPERATION;
1761
1762    // get screen geometry
1763    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1764    const uint32_t hw_w = hw.getWidth();
1765    const uint32_t hw_h = hw.getHeight();
1766    const Region screenBounds(hw.bounds());
1767
1768    GLfloat u, v;
1769    GLuint tname;
1770    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1771    if (result != NO_ERROR) {
1772        return result;
1773    }
1774
1775    GLfloat vtx[8];
1776    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1777    glBindTexture(GL_TEXTURE_2D, tname);
1778    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1779    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1780    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1781    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1782    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1783    glVertexPointer(2, GL_FLOAT, 0, vtx);
1784
1785    class s_curve_interpolator {
1786        const float nbFrames, s, v;
1787    public:
1788        s_curve_interpolator(int nbFrames, float s)
1789        : nbFrames(1.0f / (nbFrames-1)), s(s),
1790          v(1.0f + expf(-s + 0.5f*s)) {
1791        }
1792        float operator()(int f) {
1793            const float x = f * nbFrames;
1794            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1795        }
1796    };
1797
1798    class v_stretch {
1799        const GLfloat hw_w, hw_h;
1800    public:
1801        v_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 = hw_h - (hw_h * v);
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    class h_stretch {
1817        const GLfloat hw_w, hw_h;
1818    public:
1819        h_stretch(uint32_t hw_w, uint32_t hw_h)
1820        : hw_w(hw_w), hw_h(hw_h) {
1821        }
1822        void operator()(GLfloat* vtx, float v) {
1823            const GLfloat w = hw_w - (hw_w * v);
1824            const GLfloat h = 1.0f;
1825            const GLfloat x = (hw_w - w) * 0.5f;
1826            const GLfloat y = (hw_h - h) * 0.5f;
1827            vtx[0] = x;         vtx[1] = y;
1828            vtx[2] = x;         vtx[3] = y + h;
1829            vtx[4] = x + w;     vtx[5] = y + h;
1830            vtx[6] = x + w;     vtx[7] = y;
1831        }
1832    };
1833
1834    // the full animation is 24 frames
1835    const int nbFrames = 12;
1836    s_curve_interpolator itr(nbFrames, 7.5f);
1837    s_curve_interpolator itg(nbFrames, 8.0f);
1838    s_curve_interpolator itb(nbFrames, 8.5f);
1839
1840    v_stretch vverts(hw_w, hw_h);
1841    glEnable(GL_BLEND);
1842    glBlendFunc(GL_ONE, GL_ONE);
1843    for (int i=0 ; i<nbFrames ; i++) {
1844        float x, y, w, h;
1845        const float vr = itr(i);
1846        const float vg = itg(i);
1847        const float vb = itb(i);
1848
1849        // clear screen
1850        glColorMask(1,1,1,1);
1851        glClear(GL_COLOR_BUFFER_BIT);
1852        glEnable(GL_TEXTURE_2D);
1853
1854        // draw the red plane
1855        vverts(vtx, vr);
1856        glColorMask(1,0,0,1);
1857        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1858
1859        // draw the green plane
1860        vverts(vtx, vg);
1861        glColorMask(0,1,0,1);
1862        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1863
1864        // draw the blue plane
1865        vverts(vtx, vb);
1866        glColorMask(0,0,1,1);
1867        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1868
1869        // draw the white highlight (we use the last vertices)
1870        glDisable(GL_TEXTURE_2D);
1871        glColorMask(1,1,1,1);
1872        glColor4f(vg, vg, vg, 1);
1873        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1874        hw.flip(screenBounds);
1875    }
1876
1877    h_stretch hverts(hw_w, hw_h);
1878    glDisable(GL_BLEND);
1879    glDisable(GL_TEXTURE_2D);
1880    glColorMask(1,1,1,1);
1881    for (int i=0 ; i<nbFrames ; i++) {
1882        const float v = itg(i);
1883        hverts(vtx, v);
1884        glClear(GL_COLOR_BUFFER_BIT);
1885        glColor4f(1-v, 1-v, 1-v, 1);
1886        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1887        hw.flip(screenBounds);
1888    }
1889
1890    glColorMask(1,1,1,1);
1891    glEnable(GL_SCISSOR_TEST);
1892    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1893    glDeleteTextures(1, &tname);
1894    glDisable(GL_TEXTURE_2D);
1895    return NO_ERROR;
1896}
1897
1898status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1899{
1900    status_t result = PERMISSION_DENIED;
1901
1902    if (!GLExtensions::getInstance().haveFramebufferObject())
1903        return INVALID_OPERATION;
1904
1905
1906    // get screen geometry
1907    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1908    const uint32_t hw_w = hw.getWidth();
1909    const uint32_t hw_h = hw.getHeight();
1910    const Region screenBounds(hw.bounds());
1911
1912    GLfloat u, v;
1913    GLuint tname;
1914    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1915    if (result != NO_ERROR) {
1916        return result;
1917    }
1918
1919    // back to main framebuffer
1920    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1921    glDisable(GL_SCISSOR_TEST);
1922
1923    GLfloat vtx[8];
1924    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
1925    glBindTexture(GL_TEXTURE_2D, tname);
1926    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1927    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1928    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1929    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1930    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1931    glVertexPointer(2, GL_FLOAT, 0, vtx);
1932
1933    class s_curve_interpolator {
1934        const float nbFrames, s, v;
1935    public:
1936        s_curve_interpolator(int nbFrames, float s)
1937        : nbFrames(1.0f / (nbFrames-1)), s(s),
1938          v(1.0f + expf(-s + 0.5f*s)) {
1939        }
1940        float operator()(int f) {
1941            const float x = f * nbFrames;
1942            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1943        }
1944    };
1945
1946    class v_stretch {
1947        const GLfloat hw_w, hw_h;
1948    public:
1949        v_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 = hw_h - (hw_h * v);
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    class h_stretch {
1965        const GLfloat hw_w, hw_h;
1966    public:
1967        h_stretch(uint32_t hw_w, uint32_t hw_h)
1968        : hw_w(hw_w), hw_h(hw_h) {
1969        }
1970        void operator()(GLfloat* vtx, float v) {
1971            const GLfloat w = hw_w - (hw_w * v);
1972            const GLfloat h = 1.0f;
1973            const GLfloat x = (hw_w - w) * 0.5f;
1974            const GLfloat y = (hw_h - h) * 0.5f;
1975            vtx[0] = x;         vtx[1] = y;
1976            vtx[2] = x;         vtx[3] = y + h;
1977            vtx[4] = x + w;     vtx[5] = y + h;
1978            vtx[6] = x + w;     vtx[7] = y;
1979        }
1980    };
1981
1982    // the full animation is 12 frames
1983    int nbFrames = 8;
1984    s_curve_interpolator itr(nbFrames, 7.5f);
1985    s_curve_interpolator itg(nbFrames, 8.0f);
1986    s_curve_interpolator itb(nbFrames, 8.5f);
1987
1988    h_stretch hverts(hw_w, hw_h);
1989    glDisable(GL_BLEND);
1990    glDisable(GL_TEXTURE_2D);
1991    glColorMask(1,1,1,1);
1992    for (int i=nbFrames-1 ; i>=0 ; i--) {
1993        const float v = itg(i);
1994        hverts(vtx, v);
1995        glClear(GL_COLOR_BUFFER_BIT);
1996        glColor4f(1-v, 1-v, 1-v, 1);
1997        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1998        hw.flip(screenBounds);
1999    }
2000
2001    nbFrames = 4;
2002    v_stretch vverts(hw_w, hw_h);
2003    glEnable(GL_BLEND);
2004    glBlendFunc(GL_ONE, GL_ONE);
2005    for (int i=nbFrames-1 ; i>=0 ; i--) {
2006        float x, y, w, h;
2007        const float vr = itr(i);
2008        const float vg = itg(i);
2009        const float vb = itb(i);
2010
2011        // clear screen
2012        glColorMask(1,1,1,1);
2013        glClear(GL_COLOR_BUFFER_BIT);
2014        glEnable(GL_TEXTURE_2D);
2015
2016        // draw the red plane
2017        vverts(vtx, vr);
2018        glColorMask(1,0,0,1);
2019        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2020
2021        // draw the green plane
2022        vverts(vtx, vg);
2023        glColorMask(0,1,0,1);
2024        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2025
2026        // draw the blue plane
2027        vverts(vtx, vb);
2028        glColorMask(0,0,1,1);
2029        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2030
2031        hw.flip(screenBounds);
2032    }
2033
2034    glColorMask(1,1,1,1);
2035    glEnable(GL_SCISSOR_TEST);
2036    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2037    glDeleteTextures(1, &tname);
2038    glDisable(GL_TEXTURE_2D);
2039
2040    return NO_ERROR;
2041}
2042
2043// ---------------------------------------------------------------------------
2044
2045status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2046{
2047    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2048    if (!hw.canDraw()) {
2049        // we're already off
2050        return NO_ERROR;
2051    }
2052    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2053        electronBeamOffAnimationImplLocked();
2054    }
2055
2056    // always clear the whole screen at the end of the animation
2057    glClearColor(0,0,0,1);
2058    glDisable(GL_SCISSOR_TEST);
2059    glClear(GL_COLOR_BUFFER_BIT);
2060    glEnable(GL_SCISSOR_TEST);
2061    hw.flip( Region(hw.bounds()) );
2062
2063    hw.setCanDraw(false);
2064    return NO_ERROR;
2065}
2066
2067status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2068{
2069    class MessageTurnElectronBeamOff : public MessageBase {
2070        SurfaceFlinger* flinger;
2071        int32_t mode;
2072        status_t result;
2073    public:
2074        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2075            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2076        }
2077        status_t getResult() const {
2078            return result;
2079        }
2080        virtual bool handler() {
2081            Mutex::Autolock _l(flinger->mStateLock);
2082            result = flinger->turnElectronBeamOffImplLocked(mode);
2083            return true;
2084        }
2085    };
2086
2087    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2088    status_t res = postMessageSync(msg);
2089    if (res == NO_ERROR) {
2090        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2091
2092        // work-around: when the power-manager calls us we activate the
2093        // animation. eventually, the "on" animation will be called
2094        // by the power-manager itself
2095        mElectronBeamAnimationMode = mode;
2096    }
2097    return res;
2098}
2099
2100// ---------------------------------------------------------------------------
2101
2102status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2103{
2104    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2105    if (hw.canDraw()) {
2106        // we're already on
2107        return NO_ERROR;
2108    }
2109    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2110        electronBeamOnAnimationImplLocked();
2111    }
2112    hw.setCanDraw(true);
2113
2114    // make sure to redraw the whole screen when the animation is done
2115    mDirtyRegion.set(hw.bounds());
2116    signalEvent();
2117
2118    return NO_ERROR;
2119}
2120
2121status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2122{
2123    class MessageTurnElectronBeamOn : public MessageBase {
2124        SurfaceFlinger* flinger;
2125        int32_t mode;
2126        status_t result;
2127    public:
2128        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2129            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2130        }
2131        status_t getResult() const {
2132            return result;
2133        }
2134        virtual bool handler() {
2135            Mutex::Autolock _l(flinger->mStateLock);
2136            result = flinger->turnElectronBeamOnImplLocked(mode);
2137            return true;
2138        }
2139    };
2140
2141    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2142    return NO_ERROR;
2143}
2144
2145// ---------------------------------------------------------------------------
2146
2147status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2148        sp<IMemoryHeap>* heap,
2149        uint32_t* w, uint32_t* h, PixelFormat* f,
2150        uint32_t sw, uint32_t sh,
2151        uint32_t minLayerZ, uint32_t maxLayerZ)
2152{
2153    status_t result = PERMISSION_DENIED;
2154
2155    // only one display supported for now
2156    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2157        return BAD_VALUE;
2158
2159    // make sure none of the layers are protected
2160    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
2161    const size_t count = layers.size();
2162    for (size_t i=0 ; i<count ; ++i) {
2163        const sp<LayerBase>& layer(layers[i]);
2164        const uint32_t z = layer->drawingState().z;
2165        if (z >= minLayerZ && z <= maxLayerZ) {
2166            if (layer->isProtected()) {
2167                return INVALID_OPERATION;
2168            }
2169        }
2170    }
2171
2172    if (!GLExtensions::getInstance().haveFramebufferObject())
2173        return INVALID_OPERATION;
2174
2175    // get screen geometry
2176    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2177    const uint32_t hw_w = hw.getWidth();
2178    const uint32_t hw_h = hw.getHeight();
2179
2180    if ((sw > hw_w) || (sh > hw_h))
2181        return BAD_VALUE;
2182
2183    sw = (!sw) ? hw_w : sw;
2184    sh = (!sh) ? hw_h : sh;
2185    const size_t size = sw * sh * 4;
2186
2187    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2188    //        sw, sh, minLayerZ, maxLayerZ);
2189
2190    // make sure to clear all GL error flags
2191    while ( glGetError() != GL_NO_ERROR ) ;
2192
2193    // create a FBO
2194    GLuint name, tname;
2195    glGenRenderbuffersOES(1, &tname);
2196    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2197    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2198    glGenFramebuffersOES(1, &name);
2199    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2200    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2201            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2202
2203    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2204
2205    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2206
2207        // invert everything, b/c glReadPixel() below will invert the FB
2208        glViewport(0, 0, sw, sh);
2209        glScissor(0, 0, sw, sh);
2210        glMatrixMode(GL_PROJECTION);
2211        glPushMatrix();
2212        glLoadIdentity();
2213        glOrthof(0, hw_w, 0, hw_h, 0, 1);
2214        glMatrixMode(GL_MODELVIEW);
2215
2216        // redraw the screen entirely...
2217        glClearColor(0,0,0,1);
2218        glClear(GL_COLOR_BUFFER_BIT);
2219
2220        for (size_t i=0 ; i<count ; ++i) {
2221            const sp<LayerBase>& layer(layers[i]);
2222            const uint32_t z = layer->drawingState().z;
2223            if (z >= minLayerZ && z <= maxLayerZ) {
2224                layer->drawForSreenShot();
2225            }
2226        }
2227
2228        // XXX: this is needed on tegra
2229        glScissor(0, 0, sw, sh);
2230
2231        // check for errors and return screen capture
2232        if (glGetError() != GL_NO_ERROR) {
2233            // error while rendering
2234            result = INVALID_OPERATION;
2235        } else {
2236            // allocate shared memory large enough to hold the
2237            // screen capture
2238            sp<MemoryHeapBase> base(
2239                    new MemoryHeapBase(size, 0, "screen-capture") );
2240            void* const ptr = base->getBase();
2241            if (ptr) {
2242                // capture the screen with glReadPixels()
2243                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2244                if (glGetError() == GL_NO_ERROR) {
2245                    *heap = base;
2246                    *w = sw;
2247                    *h = sh;
2248                    *f = PIXEL_FORMAT_RGBA_8888;
2249                    result = NO_ERROR;
2250                }
2251            } else {
2252                result = NO_MEMORY;
2253            }
2254        }
2255        glEnable(GL_SCISSOR_TEST);
2256        glViewport(0, 0, hw_w, hw_h);
2257        glMatrixMode(GL_PROJECTION);
2258        glPopMatrix();
2259        glMatrixMode(GL_MODELVIEW);
2260    } else {
2261        result = BAD_VALUE;
2262    }
2263
2264    // release FBO resources
2265    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2266    glDeleteRenderbuffersOES(1, &tname);
2267    glDeleteFramebuffersOES(1, &name);
2268
2269    hw.compositionComplete();
2270
2271    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2272
2273    return result;
2274}
2275
2276
2277status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2278        sp<IMemoryHeap>* heap,
2279        uint32_t* width, uint32_t* height, PixelFormat* format,
2280        uint32_t sw, uint32_t sh,
2281        uint32_t minLayerZ, uint32_t maxLayerZ)
2282{
2283    // only one display supported for now
2284    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2285        return BAD_VALUE;
2286
2287    if (!GLExtensions::getInstance().haveFramebufferObject())
2288        return INVALID_OPERATION;
2289
2290    class MessageCaptureScreen : public MessageBase {
2291        SurfaceFlinger* flinger;
2292        DisplayID dpy;
2293        sp<IMemoryHeap>* heap;
2294        uint32_t* w;
2295        uint32_t* h;
2296        PixelFormat* f;
2297        uint32_t sw;
2298        uint32_t sh;
2299        uint32_t minLayerZ;
2300        uint32_t maxLayerZ;
2301        status_t result;
2302    public:
2303        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2304                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2305                uint32_t sw, uint32_t sh,
2306                uint32_t minLayerZ, uint32_t maxLayerZ)
2307            : flinger(flinger), dpy(dpy),
2308              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2309              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2310              result(PERMISSION_DENIED)
2311        {
2312        }
2313        status_t getResult() const {
2314            return result;
2315        }
2316        virtual bool handler() {
2317            Mutex::Autolock _l(flinger->mStateLock);
2318
2319            // if we have secure windows, never allow the screen capture
2320            if (flinger->mSecureFrameBuffer)
2321                return true;
2322
2323            result = flinger->captureScreenImplLocked(dpy,
2324                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2325
2326            return true;
2327        }
2328    };
2329
2330    sp<MessageBase> msg = new MessageCaptureScreen(this,
2331            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2332    status_t res = postMessageSync(msg);
2333    if (res == NO_ERROR) {
2334        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2335    }
2336    return res;
2337}
2338
2339// ---------------------------------------------------------------------------
2340
2341sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2342{
2343    sp<Layer> result;
2344    Mutex::Autolock _l(mStateLock);
2345    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2346    return result;
2347}
2348
2349// ---------------------------------------------------------------------------
2350
2351Client::Client(const sp<SurfaceFlinger>& flinger)
2352    : mFlinger(flinger), mNameGenerator(1)
2353{
2354}
2355
2356Client::~Client()
2357{
2358    const size_t count = mLayers.size();
2359    for (size_t i=0 ; i<count ; i++) {
2360        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2361        if (layer != 0) {
2362            mFlinger->removeLayer(layer);
2363        }
2364    }
2365}
2366
2367status_t Client::initCheck() const {
2368    return NO_ERROR;
2369}
2370
2371size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2372{
2373    Mutex::Autolock _l(mLock);
2374    size_t name = mNameGenerator++;
2375    mLayers.add(name, layer);
2376    return name;
2377}
2378
2379void Client::detachLayer(const LayerBaseClient* layer)
2380{
2381    Mutex::Autolock _l(mLock);
2382    // we do a linear search here, because this doesn't happen often
2383    const size_t count = mLayers.size();
2384    for (size_t i=0 ; i<count ; i++) {
2385        if (mLayers.valueAt(i) == layer) {
2386            mLayers.removeItemsAt(i, 1);
2387            break;
2388        }
2389    }
2390}
2391sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2392{
2393    Mutex::Autolock _l(mLock);
2394    sp<LayerBaseClient> lbc;
2395    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2396    if (layer != 0) {
2397        lbc = layer.promote();
2398        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2399    }
2400    return lbc;
2401}
2402
2403
2404status_t Client::onTransact(
2405    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2406{
2407    // these must be checked
2408     IPCThreadState* ipc = IPCThreadState::self();
2409     const int pid = ipc->getCallingPid();
2410     const int uid = ipc->getCallingUid();
2411     const int self_pid = getpid();
2412     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2413         // we're called from a different process, do the real check
2414         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2415         {
2416             LOGE("Permission Denial: "
2417                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2418             return PERMISSION_DENIED;
2419         }
2420     }
2421     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2422}
2423
2424
2425sp<ISurface> Client::createSurface(
2426        ISurfaceComposerClient::surface_data_t* params,
2427        const String8& name,
2428        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2429        uint32_t flags)
2430{
2431    /*
2432     * createSurface must be called from the GL thread so that it can
2433     * have access to the GL context.
2434     */
2435
2436    class MessageCreateSurface : public MessageBase {
2437        sp<ISurface> result;
2438        SurfaceFlinger* flinger;
2439        ISurfaceComposerClient::surface_data_t* params;
2440        Client* client;
2441        const String8& name;
2442        DisplayID display;
2443        uint32_t w, h;
2444        PixelFormat format;
2445        uint32_t flags;
2446    public:
2447        MessageCreateSurface(SurfaceFlinger* flinger,
2448                ISurfaceComposerClient::surface_data_t* params,
2449                const String8& name, Client* client,
2450                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2451                uint32_t flags)
2452            : flinger(flinger), params(params), client(client), name(name),
2453              display(display), w(w), h(h), format(format), flags(flags)
2454        {
2455        }
2456        sp<ISurface> getResult() const { return result; }
2457        virtual bool handler() {
2458            result = flinger->createSurface(params, name, client,
2459                    display, w, h, format, flags);
2460            return true;
2461        }
2462    };
2463
2464    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2465            params, name, this, display, w, h, format, flags);
2466    mFlinger->postMessageSync(msg);
2467    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2468}
2469status_t Client::destroySurface(SurfaceID sid) {
2470    return mFlinger->removeSurface(this, sid);
2471}
2472status_t Client::setState(int32_t count, const layer_state_t* states) {
2473    return mFlinger->setClientState(this, count, states);
2474}
2475
2476// ---------------------------------------------------------------------------
2477
2478GraphicBufferAlloc::GraphicBufferAlloc() {}
2479
2480GraphicBufferAlloc::~GraphicBufferAlloc() {}
2481
2482sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2483        PixelFormat format, uint32_t usage) {
2484    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2485    status_t err = graphicBuffer->initCheck();
2486    if (err != 0 || graphicBuffer->handle == 0) {
2487        GraphicBuffer::dumpAllocationsToSystemLog();
2488        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2489             "failed (%s), handle=%p",
2490                w, h, strerror(-err), graphicBuffer->handle);
2491        return 0;
2492    }
2493    return graphicBuffer;
2494}
2495
2496// ---------------------------------------------------------------------------
2497
2498GraphicPlane::GraphicPlane()
2499    : mHw(0)
2500{
2501}
2502
2503GraphicPlane::~GraphicPlane() {
2504    delete mHw;
2505}
2506
2507bool GraphicPlane::initialized() const {
2508    return mHw ? true : false;
2509}
2510
2511int GraphicPlane::getWidth() const {
2512    return mWidth;
2513}
2514
2515int GraphicPlane::getHeight() const {
2516    return mHeight;
2517}
2518
2519void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2520{
2521    mHw = hw;
2522
2523    // initialize the display orientation transform.
2524    // it's a constant that should come from the display driver.
2525    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2526    char property[PROPERTY_VALUE_MAX];
2527    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2528        //displayOrientation
2529        switch (atoi(property)) {
2530        case 90:
2531            displayOrientation = ISurfaceComposer::eOrientation90;
2532            break;
2533        case 270:
2534            displayOrientation = ISurfaceComposer::eOrientation270;
2535            break;
2536        }
2537    }
2538
2539    const float w = hw->getWidth();
2540    const float h = hw->getHeight();
2541    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2542            &mDisplayTransform);
2543    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2544        mDisplayWidth = h;
2545        mDisplayHeight = w;
2546    } else {
2547        mDisplayWidth = w;
2548        mDisplayHeight = h;
2549    }
2550
2551    setOrientation(ISurfaceComposer::eOrientationDefault);
2552}
2553
2554status_t GraphicPlane::orientationToTransfrom(
2555        int orientation, int w, int h, Transform* tr)
2556{
2557    uint32_t flags = 0;
2558    switch (orientation) {
2559    case ISurfaceComposer::eOrientationDefault:
2560        flags = Transform::ROT_0;
2561        break;
2562    case ISurfaceComposer::eOrientation90:
2563        flags = Transform::ROT_90;
2564        break;
2565    case ISurfaceComposer::eOrientation180:
2566        flags = Transform::ROT_180;
2567        break;
2568    case ISurfaceComposer::eOrientation270:
2569        flags = Transform::ROT_270;
2570        break;
2571    default:
2572        return BAD_VALUE;
2573    }
2574    tr->set(flags, w, h);
2575    return NO_ERROR;
2576}
2577
2578status_t GraphicPlane::setOrientation(int orientation)
2579{
2580    // If the rotation can be handled in hardware, this is where
2581    // the magic should happen.
2582
2583    const DisplayHardware& hw(displayHardware());
2584    const float w = mDisplayWidth;
2585    const float h = mDisplayHeight;
2586    mWidth = int(w);
2587    mHeight = int(h);
2588
2589    Transform orientationTransform;
2590    GraphicPlane::orientationToTransfrom(orientation, w, h,
2591            &orientationTransform);
2592    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2593        mWidth = int(h);
2594        mHeight = int(w);
2595    }
2596
2597    mOrientation = orientation;
2598    mGlobalTransform = mDisplayTransform * orientationTransform;
2599    return NO_ERROR;
2600}
2601
2602const DisplayHardware& GraphicPlane::displayHardware() const {
2603    return *mHw;
2604}
2605
2606DisplayHardware& GraphicPlane::editDisplayHardware() {
2607    return *mHw;
2608}
2609
2610const Transform& GraphicPlane::transform() const {
2611    return mGlobalTransform;
2612}
2613
2614EGLDisplay GraphicPlane::getEGLDisplay() const {
2615    return mHw->getEGLDisplay();
2616}
2617
2618// ---------------------------------------------------------------------------
2619
2620}; // namespace android
2621