SurfaceFlinger.cpp revision 43bfe7f047668a5b74fefb8cfecbf070f637201b 
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 <gui/IDisplayEventConnection.h>
38
39#include <utils/String8.h>
40#include <utils/String16.h>
41#include <utils/StopWatch.h>
42
43#include <ui/GraphicBufferAllocator.h>
44#include <ui/GraphicLog.h>
45#include <ui/PixelFormat.h>
46
47#include <pixelflinger/pixelflinger.h>
48#include <GLES/gl.h>
49
50#include "clz.h"
51#include "DisplayEventConnection.h"
52#include "EventThread.h"
53#include "GLExtensions.h"
54#include "DdmConnection.h"
55#include "Layer.h"
56#include "LayerDim.h"
57#include "LayerScreenshot.h"
58#include "SurfaceFlinger.h"
59
60#include "DisplayHardware/DisplayHardware.h"
61#include "DisplayHardware/HWComposer.h"
62
63#include <private/surfaceflinger/SharedBufferStack.h>
64
65/* ideally AID_GRAPHICS would be in a semi-public header
66 * or there would be a way to map a user/group name to its id
67 */
68#ifndef AID_GRAPHICS
69#define AID_GRAPHICS 1003
70#endif
71
72#define EGL_VERSION_HW_ANDROID  0x3143
73
74#define DISPLAY_COUNT       1
75
76namespace android {
77// ---------------------------------------------------------------------------
78
79const String16 sHardwareTest("android.permission.HARDWARE_TEST");
80const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
81const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
82const String16 sDump("android.permission.DUMP");
83
84// ---------------------------------------------------------------------------
85
86SurfaceFlinger::SurfaceFlinger()
87    :   BnSurfaceComposer(), Thread(false),
88        mTransactionFlags(0),
89        mTransationPending(false),
90        mLayersRemoved(false),
91        mBootTime(systemTime()),
92        mVisibleRegionsDirty(false),
93        mHwWorkListDirty(false),
94        mElectronBeamAnimationMode(0),
95        mDebugRegion(0),
96        mDebugBackground(0),
97        mDebugDDMS(0),
98        mDebugDisableHWC(0),
99        mDebugDisableTransformHint(0),
100        mDebugInSwapBuffers(0),
101        mLastSwapBufferTime(0),
102        mDebugInTransaction(0),
103        mLastTransactionTime(0),
104        mBootFinished(false),
105        mConsoleSignals(0),
106        mSecureFrameBuffer(0)
107{
108    init();
109}
110
111void SurfaceFlinger::init()
112{
113    LOGI("SurfaceFlinger is starting");
114
115    // debugging stuff...
116    char value[PROPERTY_VALUE_MAX];
117
118    property_get("debug.sf.showupdates", value, "0");
119    mDebugRegion = atoi(value);
120
121    property_get("debug.sf.showbackground", value, "0");
122    mDebugBackground = atoi(value);
123
124    property_get("debug.sf.ddms", value, "0");
125    mDebugDDMS = atoi(value);
126    if (mDebugDDMS) {
127        DdmConnection::start(getServiceName());
128    }
129
130    LOGI_IF(mDebugRegion,       "showupdates enabled");
131    LOGI_IF(mDebugBackground,   "showbackground enabled");
132    LOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
133}
134
135SurfaceFlinger::~SurfaceFlinger()
136{
137    glDeleteTextures(1, &mWormholeTexName);
138}
139
140sp<IMemoryHeap> SurfaceFlinger::getCblk() const
141{
142    return mServerHeap;
143}
144
145sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
146{
147    sp<ISurfaceComposerClient> bclient;
148    sp<Client> client(new Client(this));
149    status_t err = client->initCheck();
150    if (err == NO_ERROR) {
151        bclient = client;
152    }
153    return bclient;
154}
155
156sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
157{
158    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
159    return gba;
160}
161
162const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
163{
164    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
165    const GraphicPlane& plane(mGraphicPlanes[dpy]);
166    return plane;
167}
168
169GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
170{
171    return const_cast<GraphicPlane&>(
172        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
173}
174
175void SurfaceFlinger::bootFinished()
176{
177    const nsecs_t now = systemTime();
178    const nsecs_t duration = now - mBootTime;
179    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
180    mBootFinished = true;
181
182    // wait patiently for the window manager death
183    const String16 name("window");
184    sp<IBinder> window(defaultServiceManager()->getService(name));
185    if (window != 0) {
186        window->linkToDeath(this);
187    }
188
189    // stop boot animation
190    property_set("ctl.stop", "bootanim");
191}
192
193void SurfaceFlinger::binderDied(const wp<IBinder>& who)
194{
195    // the window manager died on us. prepare its eulogy.
196
197    // reset screen orientation
198    setOrientation(0, eOrientationDefault, 0);
199
200    // restart the boot-animation
201    property_set("ctl.start", "bootanim");
202}
203
204void SurfaceFlinger::onFirstRef()
205{
206    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
207
208    // Wait for the main thread to be done with its initialization
209    mReadyToRunBarrier.wait();
210}
211
212static inline uint16_t pack565(int r, int g, int b) {
213    return (r<<11)|(g<<5)|b;
214}
215
216status_t SurfaceFlinger::readyToRun()
217{
218    LOGI(   "SurfaceFlinger's main thread ready to run. "
219            "Initializing graphics H/W...");
220
221    // we only support one display currently
222    int dpy = 0;
223
224    {
225        // initialize the main display
226        GraphicPlane& plane(graphicPlane(dpy));
227        DisplayHardware* const hw = new DisplayHardware(this, dpy);
228        plane.setDisplayHardware(hw);
229    }
230
231    // create the shared control-block
232    mServerHeap = new MemoryHeapBase(4096,
233            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
234    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
235
236    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
237    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
238
239    new(mServerCblk) surface_flinger_cblk_t;
240
241    // initialize primary screen
242    // (other display should be initialized in the same manner, but
243    // asynchronously, as they could come and go. None of this is supported
244    // yet).
245    const GraphicPlane& plane(graphicPlane(dpy));
246    const DisplayHardware& hw = plane.displayHardware();
247    const uint32_t w = hw.getWidth();
248    const uint32_t h = hw.getHeight();
249    const uint32_t f = hw.getFormat();
250    hw.makeCurrent();
251
252    // initialize the shared control block
253    mServerCblk->connected |= 1<<dpy;
254    display_cblk_t* dcblk = mServerCblk->displays + dpy;
255    memset(dcblk, 0, sizeof(display_cblk_t));
256    dcblk->w            = plane.getWidth();
257    dcblk->h            = plane.getHeight();
258    dcblk->format       = f;
259    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
260    dcblk->xdpi         = hw.getDpiX();
261    dcblk->ydpi         = hw.getDpiY();
262    dcblk->fps          = hw.getRefreshRate();
263    dcblk->density      = hw.getDensity();
264
265    // Initialize OpenGL|ES
266    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
267    glPixelStorei(GL_PACK_ALIGNMENT, 4);
268    glEnableClientState(GL_VERTEX_ARRAY);
269    glEnable(GL_SCISSOR_TEST);
270    glShadeModel(GL_FLAT);
271    glDisable(GL_DITHER);
272    glDisable(GL_CULL_FACE);
273
274    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
275    const uint16_t g1 = pack565(0x17,0x2f,0x17);
276    const uint16_t wormholeTexData[4] = { g0, g1, g1, g0 };
277    glGenTextures(1, &mWormholeTexName);
278    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
279    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
280    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
283    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
284            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, wormholeTexData);
285
286    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
287    glGenTextures(1, &mProtectedTexName);
288    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
289    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
290    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
291    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
292    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
293    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
294            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
295
296    glViewport(0, 0, w, h);
297    glMatrixMode(GL_PROJECTION);
298    glLoadIdentity();
299    // put the origin in the left-bottom corner
300    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
301
302
303    // start the EventThread
304    mEventThread = new EventThread(this);
305
306    /*
307     *  We're now ready to accept clients...
308     */
309
310    mReadyToRunBarrier.open();
311
312    // start boot animation
313    property_set("ctl.start", "bootanim");
314
315    return NO_ERROR;
316}
317
318// ----------------------------------------------------------------------------
319#if 0
320#pragma mark -
321#pragma mark Events Handler
322#endif
323
324void SurfaceFlinger::waitForEvent() {
325    mEventQueue.waitMessage();
326}
327
328void SurfaceFlinger::signalEvent() {
329    mEventQueue.invalidate();
330}
331
332status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
333        nsecs_t reltime, uint32_t flags) {
334    return mEventQueue.postMessage(msg, reltime);
335}
336
337status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
338        nsecs_t reltime, uint32_t flags) {
339    status_t res = mEventQueue.postMessage(msg, reltime);
340    if (res == NO_ERROR) {
341        msg->wait();
342    }
343    return res;
344}
345
346// ----------------------------------------------------------------------------
347
348bool SurfaceFlinger::authenticateSurfaceTexture(
349        const sp<ISurfaceTexture>& surfaceTexture) const {
350    Mutex::Autolock _l(mStateLock);
351    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
352
353    // Check the visible layer list for the ISurface
354    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
355    size_t count = currentLayers.size();
356    for (size_t i=0 ; i<count ; i++) {
357        const sp<LayerBase>& layer(currentLayers[i]);
358        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
359        if (lbc != NULL) {
360            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
361            if (lbcBinder == surfaceTextureBinder) {
362                return true;
363            }
364        }
365    }
366
367    // Check the layers in the purgatory.  This check is here so that if a
368    // SurfaceTexture gets destroyed before all the clients are done using it,
369    // the error will not be reported as "surface XYZ is not authenticated", but
370    // will instead fail later on when the client tries to use the surface,
371    // which should be reported as "surface XYZ returned an -ENODEV".  The
372    // purgatorized layers are no less authentic than the visible ones, so this
373    // should not cause any harm.
374    size_t purgatorySize =  mLayerPurgatory.size();
375    for (size_t i=0 ; i<purgatorySize ; i++) {
376        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
377        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
378        if (lbc != NULL) {
379            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
380            if (lbcBinder == surfaceTextureBinder) {
381                return true;
382            }
383        }
384    }
385
386    return false;
387}
388
389// ----------------------------------------------------------------------------
390
391sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
392    sp<DisplayEventConnection> result(new DisplayEventConnection(this));
393    mEventThread->registerDisplayEventConnection(result);
394    return result;
395}
396
397void SurfaceFlinger::cleanupDisplayEventConnection(
398        const wp<DisplayEventConnection>& connection) {
399    mEventThread->unregisterDisplayEventConnection(connection);
400}
401
402// ----------------------------------------------------------------------------
403#if 0
404#pragma mark -
405#pragma mark Main loop
406#endif
407
408bool SurfaceFlinger::threadLoop()
409{
410    waitForEvent();
411
412    // check for transactions
413    if (UNLIKELY(mConsoleSignals)) {
414        handleConsoleEvents();
415    }
416
417    // if we're in a global transaction, don't do anything.
418    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
419    uint32_t transactionFlags = peekTransactionFlags(mask);
420    if (UNLIKELY(transactionFlags)) {
421        handleTransaction(transactionFlags);
422    }
423
424    // post surfaces (if needed)
425    handlePageFlip();
426
427    if (mDirtyRegion.isEmpty()) {
428        // nothing new to do.
429        return true;
430    }
431
432    if (UNLIKELY(mHwWorkListDirty)) {
433        // build the h/w work list
434        handleWorkList();
435    }
436
437    const DisplayHardware& hw(graphicPlane(0).displayHardware());
438    if (LIKELY(hw.canDraw())) {
439        // repaint the framebuffer (if needed)
440
441        const int index = hw.getCurrentBufferIndex();
442        GraphicLog& logger(GraphicLog::getInstance());
443
444        logger.log(GraphicLog::SF_REPAINT, index);
445        handleRepaint();
446
447        // inform the h/w that we're done compositing
448        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
449        hw.compositionComplete();
450
451        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
452        postFramebuffer();
453
454        logger.log(GraphicLog::SF_REPAINT_DONE, index);
455    } else {
456        // pretend we did the post
457        hw.compositionComplete();
458        hw.waitForVSync();
459    }
460    return true;
461}
462
463void SurfaceFlinger::postFramebuffer()
464{
465    // this should never happen. we do the flip anyways so we don't
466    // risk to cause a deadlock with hwc
467    LOGW_IF(mSwapRegion.isEmpty(), "mSwapRegion is empty");
468    const DisplayHardware& hw(graphicPlane(0).displayHardware());
469    const nsecs_t now = systemTime();
470    mDebugInSwapBuffers = now;
471    hw.flip(mSwapRegion);
472    mLastSwapBufferTime = systemTime() - now;
473    mDebugInSwapBuffers = 0;
474    mSwapRegion.clear();
475}
476
477void SurfaceFlinger::handleConsoleEvents()
478{
479    // something to do with the console
480    const DisplayHardware& hw = graphicPlane(0).displayHardware();
481
482    int what = android_atomic_and(0, &mConsoleSignals);
483    if (what & eConsoleAcquired) {
484        hw.acquireScreen();
485        // this is a temporary work-around, eventually this should be called
486        // by the power-manager
487        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
488    }
489
490    if (what & eConsoleReleased) {
491        if (hw.isScreenAcquired()) {
492            hw.releaseScreen();
493        }
494    }
495
496    mDirtyRegion.set(hw.bounds());
497}
498
499void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
500{
501    Mutex::Autolock _l(mStateLock);
502    const nsecs_t now = systemTime();
503    mDebugInTransaction = now;
504
505    // Here we're guaranteed that some transaction flags are set
506    // so we can call handleTransactionLocked() unconditionally.
507    // We call getTransactionFlags(), which will also clear the flags,
508    // with mStateLock held to guarantee that mCurrentState won't change
509    // until the transaction is committed.
510
511    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
512    transactionFlags = getTransactionFlags(mask);
513    handleTransactionLocked(transactionFlags);
514
515    mLastTransactionTime = systemTime() - now;
516    mDebugInTransaction = 0;
517    invalidateHwcGeometry();
518    // here the transaction has been committed
519}
520
521void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
522{
523    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
524    const size_t count = currentLayers.size();
525
526    /*
527     * Traversal of the children
528     * (perform the transaction for each of them if needed)
529     */
530
531    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
532    if (layersNeedTransaction) {
533        for (size_t i=0 ; i<count ; i++) {
534            const sp<LayerBase>& layer = currentLayers[i];
535            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
536            if (!trFlags) continue;
537
538            const uint32_t flags = layer->doTransaction(0);
539            if (flags & Layer::eVisibleRegion)
540                mVisibleRegionsDirty = true;
541        }
542    }
543
544    /*
545     * Perform our own transaction if needed
546     */
547
548    if (transactionFlags & eTransactionNeeded) {
549        if (mCurrentState.orientation != mDrawingState.orientation) {
550            // the orientation has changed, recompute all visible regions
551            // and invalidate everything.
552
553            const int dpy = 0;
554            const int orientation = mCurrentState.orientation;
555            // Currently unused: const uint32_t flags = mCurrentState.orientationFlags;
556            GraphicPlane& plane(graphicPlane(dpy));
557            plane.setOrientation(orientation);
558
559            // update the shared control block
560            const DisplayHardware& hw(plane.displayHardware());
561            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
562            dcblk->orientation = orientation;
563            dcblk->w = plane.getWidth();
564            dcblk->h = plane.getHeight();
565
566            mVisibleRegionsDirty = true;
567            mDirtyRegion.set(hw.bounds());
568        }
569
570        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
571            // layers have been added
572            mVisibleRegionsDirty = true;
573        }
574
575        // some layers might have been removed, so
576        // we need to update the regions they're exposing.
577        if (mLayersRemoved) {
578            mLayersRemoved = false;
579            mVisibleRegionsDirty = true;
580            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
581            const size_t count = previousLayers.size();
582            for (size_t i=0 ; i<count ; i++) {
583                const sp<LayerBase>& layer(previousLayers[i]);
584                if (currentLayers.indexOf( layer ) < 0) {
585                    // this layer is not visible anymore
586                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
587                }
588            }
589        }
590    }
591
592    commitTransaction();
593}
594
595void SurfaceFlinger::computeVisibleRegions(
596    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
597{
598    const GraphicPlane& plane(graphicPlane(0));
599    const Transform& planeTransform(plane.transform());
600    const DisplayHardware& hw(plane.displayHardware());
601    const Region screenRegion(hw.bounds());
602
603    Region aboveOpaqueLayers;
604    Region aboveCoveredLayers;
605    Region dirty;
606
607    bool secureFrameBuffer = false;
608
609    size_t i = currentLayers.size();
610    while (i--) {
611        const sp<LayerBase>& layer = currentLayers[i];
612        layer->validateVisibility(planeTransform);
613
614        // start with the whole surface at its current location
615        const Layer::State& s(layer->drawingState());
616
617        /*
618         * opaqueRegion: area of a surface that is fully opaque.
619         */
620        Region opaqueRegion;
621
622        /*
623         * visibleRegion: area of a surface that is visible on screen
624         * and not fully transparent. This is essentially the layer's
625         * footprint minus the opaque regions above it.
626         * Areas covered by a translucent surface are considered visible.
627         */
628        Region visibleRegion;
629
630        /*
631         * coveredRegion: area of a surface that is covered by all
632         * visible regions above it (which includes the translucent areas).
633         */
634        Region coveredRegion;
635
636
637        // handle hidden surfaces by setting the visible region to empty
638        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
639            const bool translucent = !layer->isOpaque();
640            const Rect bounds(layer->visibleBounds());
641            visibleRegion.set(bounds);
642            visibleRegion.andSelf(screenRegion);
643            if (!visibleRegion.isEmpty()) {
644                // Remove the transparent area from the visible region
645                if (translucent) {
646                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
647                }
648
649                // compute the opaque region
650                const int32_t layerOrientation = layer->getOrientation();
651                if (s.alpha==255 && !translucent &&
652                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
653                    // the opaque region is the layer's footprint
654                    opaqueRegion = visibleRegion;
655                }
656            }
657        }
658
659        // Clip the covered region to the visible region
660        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
661
662        // Update aboveCoveredLayers for next (lower) layer
663        aboveCoveredLayers.orSelf(visibleRegion);
664
665        // subtract the opaque region covered by the layers above us
666        visibleRegion.subtractSelf(aboveOpaqueLayers);
667
668        // compute this layer's dirty region
669        if (layer->contentDirty) {
670            // we need to invalidate the whole region
671            dirty = visibleRegion;
672            // as well, as the old visible region
673            dirty.orSelf(layer->visibleRegionScreen);
674            layer->contentDirty = false;
675        } else {
676            /* compute the exposed region:
677             *   the exposed region consists of two components:
678             *   1) what's VISIBLE now and was COVERED before
679             *   2) what's EXPOSED now less what was EXPOSED before
680             *
681             * note that (1) is conservative, we start with the whole
682             * visible region but only keep what used to be covered by
683             * something -- which mean it may have been exposed.
684             *
685             * (2) handles areas that were not covered by anything but got
686             * exposed because of a resize.
687             */
688            const Region newExposed = visibleRegion - coveredRegion;
689            const Region oldVisibleRegion = layer->visibleRegionScreen;
690            const Region oldCoveredRegion = layer->coveredRegionScreen;
691            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
692            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
693        }
694        dirty.subtractSelf(aboveOpaqueLayers);
695
696        // accumulate to the screen dirty region
697        dirtyRegion.orSelf(dirty);
698
699        // Update aboveOpaqueLayers for next (lower) layer
700        aboveOpaqueLayers.orSelf(opaqueRegion);
701
702        // Store the visible region is screen space
703        layer->setVisibleRegion(visibleRegion);
704        layer->setCoveredRegion(coveredRegion);
705
706        // If a secure layer is partially visible, lock-down the screen!
707        if (layer->isSecure() && !visibleRegion.isEmpty()) {
708            secureFrameBuffer = true;
709        }
710    }
711
712    // invalidate the areas where a layer was removed
713    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
714    mDirtyRegionRemovedLayer.clear();
715
716    mSecureFrameBuffer = secureFrameBuffer;
717    opaqueRegion = aboveOpaqueLayers;
718}
719
720
721void SurfaceFlinger::commitTransaction()
722{
723    if (!mLayersPendingRemoval.isEmpty()) {
724        // Notify removed layers now that they can't be drawn from
725        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
726            mLayersPendingRemoval[i]->onRemoved();
727        }
728        mLayersPendingRemoval.clear();
729    }
730
731    mDrawingState = mCurrentState;
732    mTransationPending = false;
733    mTransactionCV.broadcast();
734}
735
736void SurfaceFlinger::handlePageFlip()
737{
738    bool visibleRegions = mVisibleRegionsDirty;
739    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
740    visibleRegions |= lockPageFlip(currentLayers);
741
742        const DisplayHardware& hw = graphicPlane(0).displayHardware();
743        const Region screenRegion(hw.bounds());
744        if (visibleRegions) {
745            Region opaqueRegion;
746            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
747
748            /*
749             *  rebuild the visible layer list
750             */
751            const size_t count = currentLayers.size();
752            mVisibleLayersSortedByZ.clear();
753            mVisibleLayersSortedByZ.setCapacity(count);
754            for (size_t i=0 ; i<count ; i++) {
755                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
756                    mVisibleLayersSortedByZ.add(currentLayers[i]);
757            }
758
759            mWormholeRegion = screenRegion.subtract(opaqueRegion);
760            mVisibleRegionsDirty = false;
761            invalidateHwcGeometry();
762        }
763
764    unlockPageFlip(currentLayers);
765
766    mDirtyRegion.orSelf(getAndClearInvalidateRegion());
767    mDirtyRegion.andSelf(screenRegion);
768}
769
770void SurfaceFlinger::invalidateHwcGeometry()
771{
772    mHwWorkListDirty = true;
773}
774
775bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
776{
777    bool recomputeVisibleRegions = false;
778    size_t count = currentLayers.size();
779    sp<LayerBase> const* layers = currentLayers.array();
780    for (size_t i=0 ; i<count ; i++) {
781        const sp<LayerBase>& layer(layers[i]);
782        layer->lockPageFlip(recomputeVisibleRegions);
783    }
784    return recomputeVisibleRegions;
785}
786
787void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
788{
789    const GraphicPlane& plane(graphicPlane(0));
790    const Transform& planeTransform(plane.transform());
791    size_t count = currentLayers.size();
792    sp<LayerBase> const* layers = currentLayers.array();
793    for (size_t i=0 ; i<count ; i++) {
794        const sp<LayerBase>& layer(layers[i]);
795        layer->unlockPageFlip(planeTransform, mDirtyRegion);
796    }
797}
798
799void SurfaceFlinger::handleWorkList()
800{
801    mHwWorkListDirty = false;
802    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
803    if (hwc.initCheck() == NO_ERROR) {
804        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
805        const size_t count = currentLayers.size();
806        hwc.createWorkList(count);
807        hwc_layer_t* const cur(hwc.getLayers());
808        for (size_t i=0 ; cur && i<count ; i++) {
809            currentLayers[i]->setGeometry(&cur[i]);
810            if (mDebugDisableHWC || mDebugRegion) {
811                cur[i].compositionType = HWC_FRAMEBUFFER;
812                cur[i].flags |= HWC_SKIP_LAYER;
813            }
814        }
815    }
816}
817
818void SurfaceFlinger::handleRepaint()
819{
820    // compute the invalid region
821    mSwapRegion.orSelf(mDirtyRegion);
822
823    if (UNLIKELY(mDebugRegion)) {
824        debugFlashRegions();
825    }
826
827    // set the frame buffer
828    const DisplayHardware& hw(graphicPlane(0).displayHardware());
829    glMatrixMode(GL_MODELVIEW);
830    glLoadIdentity();
831
832    uint32_t flags = hw.getFlags();
833    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
834        (flags & DisplayHardware::BUFFER_PRESERVED))
835    {
836        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
837        // takes a rectangle, we must make sure to update that whole
838        // rectangle in that case
839        if (flags & DisplayHardware::SWAP_RECTANGLE) {
840            // TODO: we really should be able to pass a region to
841            // SWAP_RECTANGLE so that we don't have to redraw all this.
842            mDirtyRegion.set(mSwapRegion.bounds());
843        } else {
844            // in the BUFFER_PRESERVED case, obviously, we can update only
845            // what's needed and nothing more.
846            // NOTE: this is NOT a common case, as preserving the backbuffer
847            // is costly and usually involves copying the whole update back.
848        }
849    } else {
850        if (flags & DisplayHardware::PARTIAL_UPDATES) {
851            // We need to redraw the rectangle that will be updated
852            // (pushed to the framebuffer).
853            // This is needed because PARTIAL_UPDATES only takes one
854            // rectangle instead of a region (see DisplayHardware::flip())
855            mDirtyRegion.set(mSwapRegion.bounds());
856        } else {
857            // we need to redraw everything (the whole screen)
858            mDirtyRegion.set(hw.bounds());
859            mSwapRegion = mDirtyRegion;
860        }
861    }
862
863    setupHardwareComposer(mDirtyRegion);
864    composeSurfaces(mDirtyRegion);
865
866    // update the swap region and clear the dirty region
867    mSwapRegion.orSelf(mDirtyRegion);
868    mDirtyRegion.clear();
869}
870
871void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
872{
873    const DisplayHardware& hw(graphicPlane(0).displayHardware());
874    HWComposer& hwc(hw.getHwComposer());
875    hwc_layer_t* const cur(hwc.getLayers());
876    if (!cur) {
877        return;
878    }
879
880    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
881    size_t count = layers.size();
882
883    LOGE_IF(hwc.getNumLayers() != count,
884            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
885            hwc.getNumLayers(), count);
886
887    // just to be extra-safe, use the smallest count
888    if (hwc.initCheck() == NO_ERROR) {
889        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
890    }
891
892    /*
893     *  update the per-frame h/w composer data for each layer
894     *  and build the transparent region of the FB
895     */
896    for (size_t i=0 ; i<count ; i++) {
897        const sp<LayerBase>& layer(layers[i]);
898        layer->setPerFrameData(&cur[i]);
899    }
900    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
901    status_t err = hwc.prepare();
902    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
903
904    if (err == NO_ERROR) {
905        // what's happening here is tricky.
906        // we want to clear all the layers with the CLEAR_FB flags
907        // that are opaque.
908        // however, since some GPU are efficient at preserving
909        // the backbuffer, we want to take advantage of that so we do the
910        // clear only in the dirty region (other areas will be preserved
911        // on those GPUs).
912        //   NOTE: on non backbuffer preserving GPU, the dirty region
913        //   has already been expanded as needed, so the code is correct
914        //   there too.
915        //
916        // However, the content of the framebuffer cannot be trusted when
917        // we switch to/from FB/OVERLAY, in which case we need to
918        // expand the dirty region to those areas too.
919        //
920        // Note also that there is a special case when switching from
921        // "no layers in FB" to "some layers in FB", where we need to redraw
922        // the entire FB, since some areas might contain uninitialized
923        // data.
924        //
925        // Also we want to make sure to not clear areas that belong to
926        // layers above that won't redraw (we would just be erasing them),
927        // that is, we can't erase anything outside the dirty region.
928
929        Region transparent;
930
931        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
932            transparent.set(hw.getBounds());
933            dirtyInOut = transparent;
934        } else {
935            for (size_t i=0 ; i<count ; i++) {
936                const sp<LayerBase>& layer(layers[i]);
937                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
938                    transparent.orSelf(layer->visibleRegionScreen);
939                }
940                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
941                if (isOverlay != layer->isOverlay()) {
942                    // we transitioned to/from overlay, so add this layer
943                    // to the dirty region so the framebuffer can be either
944                    // cleared or redrawn.
945                    dirtyInOut.orSelf(layer->visibleRegionScreen);
946                }
947                layer->setOverlay(isOverlay);
948            }
949            // don't erase stuff outside the dirty region
950            transparent.andSelf(dirtyInOut);
951        }
952
953        /*
954         *  clear the area of the FB that need to be transparent
955         */
956        if (!transparent.isEmpty()) {
957            glClearColor(0,0,0,0);
958            Region::const_iterator it = transparent.begin();
959            Region::const_iterator const end = transparent.end();
960            const int32_t height = hw.getHeight();
961            while (it != end) {
962                const Rect& r(*it++);
963                const GLint sy = height - (r.top + r.height());
964                glScissor(r.left, sy, r.width(), r.height());
965                glClear(GL_COLOR_BUFFER_BIT);
966            }
967        }
968    }
969}
970
971void SurfaceFlinger::composeSurfaces(const Region& dirty)
972{
973    const DisplayHardware& hw(graphicPlane(0).displayHardware());
974    HWComposer& hwc(hw.getHwComposer());
975
976    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
977    if (UNLIKELY(fbLayerCount && !mWormholeRegion.isEmpty())) {
978        // should never happen unless the window manager has a bug
979        // draw something...
980        drawWormhole();
981    }
982
983    /*
984     * and then, render the layers targeted at the framebuffer
985     */
986    hwc_layer_t* const cur(hwc.getLayers());
987    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
988    size_t count = layers.size();
989    for (size_t i=0 ; i<count ; i++) {
990        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
991            continue;
992        }
993        const sp<LayerBase>& layer(layers[i]);
994        const Region clip(dirty.intersect(layer->visibleRegionScreen));
995        if (!clip.isEmpty()) {
996            layer->draw(clip);
997        }
998    }
999}
1000
1001void SurfaceFlinger::debugFlashRegions()
1002{
1003    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1004    const uint32_t flags = hw.getFlags();
1005    const int32_t height = hw.getHeight();
1006    if (mSwapRegion.isEmpty()) {
1007        return;
1008    }
1009
1010    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1011            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1012        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1013                mDirtyRegion.bounds() : hw.bounds());
1014        composeSurfaces(repaint);
1015    }
1016
1017    glDisable(GL_TEXTURE_EXTERNAL_OES);
1018    glDisable(GL_TEXTURE_2D);
1019    glDisable(GL_BLEND);
1020    glDisable(GL_SCISSOR_TEST);
1021
1022    static int toggle = 0;
1023    toggle = 1 - toggle;
1024    if (toggle) {
1025        glColor4f(1, 0, 1, 1);
1026    } else {
1027        glColor4f(1, 1, 0, 1);
1028    }
1029
1030    Region::const_iterator it = mDirtyRegion.begin();
1031    Region::const_iterator const end = mDirtyRegion.end();
1032    while (it != end) {
1033        const Rect& r = *it++;
1034        GLfloat vertices[][2] = {
1035                { r.left,  height - r.top },
1036                { r.left,  height - r.bottom },
1037                { r.right, height - r.bottom },
1038                { r.right, height - r.top }
1039        };
1040        glVertexPointer(2, GL_FLOAT, 0, vertices);
1041        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1042    }
1043
1044    hw.flip(mSwapRegion);
1045
1046    if (mDebugRegion > 1)
1047        usleep(mDebugRegion * 1000);
1048
1049    glEnable(GL_SCISSOR_TEST);
1050}
1051
1052void SurfaceFlinger::drawWormhole() const
1053{
1054    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1055    if (region.isEmpty())
1056        return;
1057
1058    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1059    const int32_t width = hw.getWidth();
1060    const int32_t height = hw.getHeight();
1061
1062    if (LIKELY(!mDebugBackground)) {
1063        glClearColor(0,0,0,0);
1064        Region::const_iterator it = region.begin();
1065        Region::const_iterator const end = region.end();
1066        while (it != end) {
1067            const Rect& r = *it++;
1068            const GLint sy = height - (r.top + r.height());
1069            glScissor(r.left, sy, r.width(), r.height());
1070            glClear(GL_COLOR_BUFFER_BIT);
1071        }
1072    } else {
1073        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1074                { width, height }, { 0, height }  };
1075        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1076
1077        glVertexPointer(2, GL_SHORT, 0, vertices);
1078        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1079        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1080
1081        glDisable(GL_TEXTURE_EXTERNAL_OES);
1082        glEnable(GL_TEXTURE_2D);
1083        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1084        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1085        glMatrixMode(GL_TEXTURE);
1086        glLoadIdentity();
1087
1088        glDisable(GL_BLEND);
1089
1090        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1091        Region::const_iterator it = region.begin();
1092        Region::const_iterator const end = region.end();
1093        while (it != end) {
1094            const Rect& r = *it++;
1095            const GLint sy = height - (r.top + r.height());
1096            glScissor(r.left, sy, r.width(), r.height());
1097            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1098        }
1099        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1100        glDisable(GL_TEXTURE_2D);
1101        glLoadIdentity();
1102        glMatrixMode(GL_MODELVIEW);
1103    }
1104}
1105
1106void SurfaceFlinger::debugShowFPS() const
1107{
1108    static int mFrameCount;
1109    static int mLastFrameCount = 0;
1110    static nsecs_t mLastFpsTime = 0;
1111    static float mFps = 0;
1112    mFrameCount++;
1113    nsecs_t now = systemTime();
1114    nsecs_t diff = now - mLastFpsTime;
1115    if (diff > ms2ns(250)) {
1116        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1117        mLastFpsTime = now;
1118        mLastFrameCount = mFrameCount;
1119    }
1120    // XXX: mFPS has the value we want
1121 }
1122
1123status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1124{
1125    Mutex::Autolock _l(mStateLock);
1126    addLayer_l(layer);
1127    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1128    return NO_ERROR;
1129}
1130
1131status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1132{
1133    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1134    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1135}
1136
1137ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1138        const sp<LayerBaseClient>& lbc)
1139{
1140    // attach this layer to the client
1141    size_t name = client->attachLayer(lbc);
1142
1143    Mutex::Autolock _l(mStateLock);
1144
1145    // add this layer to the current state list
1146    addLayer_l(lbc);
1147
1148    return ssize_t(name);
1149}
1150
1151status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1152{
1153    Mutex::Autolock _l(mStateLock);
1154    status_t err = purgatorizeLayer_l(layer);
1155    if (err == NO_ERROR)
1156        setTransactionFlags(eTransactionNeeded);
1157    return err;
1158}
1159
1160status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1161{
1162    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1163    if (lbc != 0) {
1164        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1165    }
1166    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1167    if (index >= 0) {
1168        mLayersRemoved = true;
1169        return NO_ERROR;
1170    }
1171    return status_t(index);
1172}
1173
1174status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1175{
1176    // First add the layer to the purgatory list, which makes sure it won't
1177    // go away, then remove it from the main list (through a transaction).
1178    ssize_t err = removeLayer_l(layerBase);
1179    if (err >= 0) {
1180        mLayerPurgatory.add(layerBase);
1181    }
1182
1183    mLayersPendingRemoval.push(layerBase);
1184
1185    // it's possible that we don't find a layer, because it might
1186    // have been destroyed already -- this is not technically an error
1187    // from the user because there is a race between Client::destroySurface(),
1188    // ~Client() and ~ISurface().
1189    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1190}
1191
1192status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1193{
1194    layer->forceVisibilityTransaction();
1195    setTransactionFlags(eTraversalNeeded);
1196    return NO_ERROR;
1197}
1198
1199uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1200{
1201    return android_atomic_release_load(&mTransactionFlags);
1202}
1203
1204uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1205{
1206    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1207}
1208
1209uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1210{
1211    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1212    if ((old & flags)==0) { // wake the server up
1213        signalEvent();
1214    }
1215    return old;
1216}
1217
1218
1219void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
1220        int orientation, uint32_t flags) {
1221    Mutex::Autolock _l(mStateLock);
1222
1223    uint32_t transactionFlags = 0;
1224    if (mCurrentState.orientation != orientation) {
1225        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1226            mCurrentState.orientation = orientation;
1227            transactionFlags |= eTransactionNeeded;
1228        } else if (orientation != eOrientationUnchanged) {
1229            LOGW("setTransactionState: ignoring unrecognized orientation: %d",
1230                    orientation);
1231        }
1232    }
1233
1234    const size_t count = state.size();
1235    for (size_t i=0 ; i<count ; i++) {
1236        const ComposerState& s(state[i]);
1237        sp<Client> client( static_cast<Client *>(s.client.get()) );
1238        transactionFlags |= setClientStateLocked(client, s.state);
1239    }
1240
1241    if (transactionFlags) {
1242        // this triggers the transaction
1243        setTransactionFlags(transactionFlags);
1244
1245        // if this is a synchronous transaction, wait for it to take effect
1246        // before returning.
1247        if (flags & eSynchronous) {
1248            mTransationPending = true;
1249        }
1250        while (mTransationPending) {
1251            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1252            if (CC_UNLIKELY(err != NO_ERROR)) {
1253                // just in case something goes wrong in SF, return to the
1254                // called after a few seconds.
1255                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1256                mTransationPending = false;
1257                break;
1258            }
1259        }
1260    }
1261}
1262
1263int SurfaceFlinger::setOrientation(DisplayID dpy,
1264        int orientation, uint32_t flags)
1265{
1266    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1267        return BAD_VALUE;
1268
1269    Mutex::Autolock _l(mStateLock);
1270    if (mCurrentState.orientation != orientation) {
1271        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1272            mCurrentState.orientationFlags = flags;
1273            mCurrentState.orientation = orientation;
1274            setTransactionFlags(eTransactionNeeded);
1275            mTransactionCV.wait(mStateLock);
1276        } else {
1277            orientation = BAD_VALUE;
1278        }
1279    }
1280    return orientation;
1281}
1282
1283sp<ISurface> SurfaceFlinger::createSurface(
1284        ISurfaceComposerClient::surface_data_t* params,
1285        const String8& name,
1286        const sp<Client>& client,
1287        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1288        uint32_t flags)
1289{
1290    sp<LayerBaseClient> layer;
1291    sp<ISurface> surfaceHandle;
1292
1293    if (int32_t(w|h) < 0) {
1294        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1295                int(w), int(h));
1296        return surfaceHandle;
1297    }
1298
1299    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1300    sp<Layer> normalLayer;
1301    switch (flags & eFXSurfaceMask) {
1302        case eFXSurfaceNormal:
1303            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1304            layer = normalLayer;
1305            break;
1306        case eFXSurfaceBlur:
1307            // for now we treat Blur as Dim, until we can implement it
1308            // efficiently.
1309        case eFXSurfaceDim:
1310            layer = createDimSurface(client, d, w, h, flags);
1311            break;
1312        case eFXSurfaceScreenshot:
1313            layer = createScreenshotSurface(client, d, w, h, flags);
1314            break;
1315    }
1316
1317    if (layer != 0) {
1318        layer->initStates(w, h, flags);
1319        layer->setName(name);
1320        ssize_t token = addClientLayer(client, layer);
1321
1322        surfaceHandle = layer->getSurface();
1323        if (surfaceHandle != 0) {
1324            params->token = token;
1325            params->identity = layer->getIdentity();
1326            if (normalLayer != 0) {
1327                Mutex::Autolock _l(mStateLock);
1328                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1329            }
1330        }
1331
1332        setTransactionFlags(eTransactionNeeded);
1333    }
1334
1335    return surfaceHandle;
1336}
1337
1338sp<Layer> SurfaceFlinger::createNormalSurface(
1339        const sp<Client>& client, DisplayID display,
1340        uint32_t w, uint32_t h, uint32_t flags,
1341        PixelFormat& format)
1342{
1343    // initialize the surfaces
1344    switch (format) { // TODO: take h/w into account
1345    case PIXEL_FORMAT_TRANSPARENT:
1346    case PIXEL_FORMAT_TRANSLUCENT:
1347        format = PIXEL_FORMAT_RGBA_8888;
1348        break;
1349    case PIXEL_FORMAT_OPAQUE:
1350#ifdef NO_RGBX_8888
1351        format = PIXEL_FORMAT_RGB_565;
1352#else
1353        format = PIXEL_FORMAT_RGBX_8888;
1354#endif
1355        break;
1356    }
1357
1358#ifdef NO_RGBX_8888
1359    if (format == PIXEL_FORMAT_RGBX_8888)
1360        format = PIXEL_FORMAT_RGBA_8888;
1361#endif
1362
1363    sp<Layer> layer = new Layer(this, display, client);
1364    status_t err = layer->setBuffers(w, h, format, flags);
1365    if (LIKELY(err != NO_ERROR)) {
1366        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1367        layer.clear();
1368    }
1369    return layer;
1370}
1371
1372sp<LayerDim> SurfaceFlinger::createDimSurface(
1373        const sp<Client>& client, DisplayID display,
1374        uint32_t w, uint32_t h, uint32_t flags)
1375{
1376    sp<LayerDim> layer = new LayerDim(this, display, client);
1377    return layer;
1378}
1379
1380sp<LayerScreenshot> SurfaceFlinger::createScreenshotSurface(
1381        const sp<Client>& client, DisplayID display,
1382        uint32_t w, uint32_t h, uint32_t flags)
1383{
1384    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1385    return layer;
1386}
1387
1388status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1389{
1390    /*
1391     * called by the window manager, when a surface should be marked for
1392     * destruction.
1393     *
1394     * The surface is removed from the current and drawing lists, but placed
1395     * in the purgatory queue, so it's not destroyed right-away (we need
1396     * to wait for all client's references to go away first).
1397     */
1398
1399    status_t err = NAME_NOT_FOUND;
1400    Mutex::Autolock _l(mStateLock);
1401    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1402    if (layer != 0) {
1403        err = purgatorizeLayer_l(layer);
1404        if (err == NO_ERROR) {
1405            setTransactionFlags(eTransactionNeeded);
1406        }
1407    }
1408    return err;
1409}
1410
1411status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1412{
1413    // called by ~ISurface() when all references are gone
1414    status_t err = NO_ERROR;
1415    sp<LayerBaseClient> l(layer.promote());
1416    if (l != NULL) {
1417        Mutex::Autolock _l(mStateLock);
1418        err = removeLayer_l(l);
1419        if (err == NAME_NOT_FOUND) {
1420            // The surface wasn't in the current list, which means it was
1421            // removed already, which means it is in the purgatory,
1422            // and need to be removed from there.
1423            ssize_t idx = mLayerPurgatory.remove(l);
1424            LOGE_IF(idx < 0,
1425                    "layer=%p is not in the purgatory list", l.get());
1426        }
1427        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1428                "error removing layer=%p (%s)", l.get(), strerror(-err));
1429    }
1430    return err;
1431}
1432
1433uint32_t SurfaceFlinger::setClientStateLocked(
1434        const sp<Client>& client,
1435        const layer_state_t& s)
1436{
1437    uint32_t flags = 0;
1438    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1439    if (layer != 0) {
1440        const uint32_t what = s.what;
1441        if (what & ePositionChanged) {
1442            if (layer->setPosition(s.x, s.y))
1443                flags |= eTraversalNeeded;
1444        }
1445        if (what & eLayerChanged) {
1446            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1447            if (layer->setLayer(s.z)) {
1448                mCurrentState.layersSortedByZ.removeAt(idx);
1449                mCurrentState.layersSortedByZ.add(layer);
1450                // we need traversal (state changed)
1451                // AND transaction (list changed)
1452                flags |= eTransactionNeeded|eTraversalNeeded;
1453            }
1454        }
1455        if (what & eSizeChanged) {
1456            if (layer->setSize(s.w, s.h)) {
1457                flags |= eTraversalNeeded;
1458            }
1459        }
1460        if (what & eAlphaChanged) {
1461            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1462                flags |= eTraversalNeeded;
1463        }
1464        if (what & eMatrixChanged) {
1465            if (layer->setMatrix(s.matrix))
1466                flags |= eTraversalNeeded;
1467        }
1468        if (what & eTransparentRegionChanged) {
1469            if (layer->setTransparentRegionHint(s.transparentRegion))
1470                flags |= eTraversalNeeded;
1471        }
1472        if (what & eVisibilityChanged) {
1473            if (layer->setFlags(s.flags, s.mask))
1474                flags |= eTraversalNeeded;
1475        }
1476    }
1477    return flags;
1478}
1479
1480void SurfaceFlinger::screenReleased(int dpy)
1481{
1482    // this may be called by a signal handler, we can't do too much in here
1483    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1484    signalEvent();
1485}
1486
1487void SurfaceFlinger::screenAcquired(int dpy)
1488{
1489    // this may be called by a signal handler, we can't do too much in here
1490    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1491    signalEvent();
1492}
1493
1494status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1495{
1496    const size_t SIZE = 4096;
1497    char buffer[SIZE];
1498    String8 result;
1499
1500    if (!PermissionCache::checkCallingPermission(sDump)) {
1501        snprintf(buffer, SIZE, "Permission Denial: "
1502                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1503                IPCThreadState::self()->getCallingPid(),
1504                IPCThreadState::self()->getCallingUid());
1505        result.append(buffer);
1506    } else {
1507
1508        // figure out if we're stuck somewhere
1509        const nsecs_t now = systemTime();
1510        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1511        const nsecs_t inTransaction(mDebugInTransaction);
1512        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1513        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1514
1515        // Try to get the main lock, but don't insist if we can't
1516        // (this would indicate SF is stuck, but we want to be able to
1517        // print something in dumpsys).
1518        int retry = 3;
1519        while (mStateLock.tryLock()<0 && --retry>=0) {
1520            usleep(1000000);
1521        }
1522        const bool locked(retry >= 0);
1523        if (!locked) {
1524            snprintf(buffer, SIZE,
1525                    "SurfaceFlinger appears to be unresponsive, "
1526                    "dumping anyways (no locks held)\n");
1527            result.append(buffer);
1528        }
1529
1530        /*
1531         * Dump the visible layer list
1532         */
1533        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1534        const size_t count = currentLayers.size();
1535        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1536        result.append(buffer);
1537        for (size_t i=0 ; i<count ; i++) {
1538            const sp<LayerBase>& layer(currentLayers[i]);
1539            layer->dump(result, buffer, SIZE);
1540            const Layer::State& s(layer->drawingState());
1541            s.transparentRegion.dump(result, "transparentRegion");
1542            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1543            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1544        }
1545
1546        /*
1547         * Dump the layers in the purgatory
1548         */
1549
1550        const size_t purgatorySize = mLayerPurgatory.size();
1551        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1552        result.append(buffer);
1553        for (size_t i=0 ; i<purgatorySize ; i++) {
1554            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1555            layer->shortDump(result, buffer, SIZE);
1556        }
1557
1558        /*
1559         * Dump SurfaceFlinger global state
1560         */
1561
1562        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1563        result.append(buffer);
1564
1565        const GLExtensions& extensions(GLExtensions::getInstance());
1566        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1567                extensions.getVendor(),
1568                extensions.getRenderer(),
1569                extensions.getVersion());
1570        result.append(buffer);
1571
1572        snprintf(buffer, SIZE, "EGL : %s\n",
1573                eglQueryString(graphicPlane(0).getEGLDisplay(),
1574                        EGL_VERSION_HW_ANDROID));
1575        result.append(buffer);
1576
1577        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1578        result.append(buffer);
1579
1580        mWormholeRegion.dump(result, "WormholeRegion");
1581        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1582        snprintf(buffer, SIZE,
1583                "  orientation=%d, canDraw=%d\n",
1584                mCurrentState.orientation, hw.canDraw());
1585        result.append(buffer);
1586        snprintf(buffer, SIZE,
1587                "  last eglSwapBuffers() time: %f us\n"
1588                "  last transaction time     : %f us\n"
1589                "  refresh-rate              : %f fps\n"
1590                "  x-dpi                     : %f\n"
1591                "  y-dpi                     : %f\n",
1592                mLastSwapBufferTime/1000.0,
1593                mLastTransactionTime/1000.0,
1594                hw.getRefreshRate(),
1595                hw.getDpiX(),
1596                hw.getDpiY());
1597        result.append(buffer);
1598
1599        if (inSwapBuffersDuration || !locked) {
1600            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1601                    inSwapBuffersDuration/1000.0);
1602            result.append(buffer);
1603        }
1604
1605        if (inTransactionDuration || !locked) {
1606            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1607                    inTransactionDuration/1000.0);
1608            result.append(buffer);
1609        }
1610
1611        /*
1612         * VSYNC state
1613         */
1614        mEventThread->dump(result, buffer, SIZE);
1615
1616        /*
1617         * Dump HWComposer state
1618         */
1619        HWComposer& hwc(hw.getHwComposer());
1620        snprintf(buffer, SIZE, "h/w composer state:\n");
1621        result.append(buffer);
1622        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1623                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1624                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1625        result.append(buffer);
1626        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1627
1628        /*
1629         * Dump gralloc state
1630         */
1631        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1632        alloc.dump(result);
1633        hw.dump(result);
1634
1635        if (locked) {
1636            mStateLock.unlock();
1637        }
1638    }
1639    write(fd, result.string(), result.size());
1640    return NO_ERROR;
1641}
1642
1643status_t SurfaceFlinger::onTransact(
1644    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1645{
1646    switch (code) {
1647        case CREATE_CONNECTION:
1648        case SET_TRANSACTION_STATE:
1649        case SET_ORIENTATION:
1650        case BOOT_FINISHED:
1651        case TURN_ELECTRON_BEAM_OFF:
1652        case TURN_ELECTRON_BEAM_ON:
1653        {
1654            // codes that require permission check
1655            IPCThreadState* ipc = IPCThreadState::self();
1656            const int pid = ipc->getCallingPid();
1657            const int uid = ipc->getCallingUid();
1658            if ((uid != AID_GRAPHICS) &&
1659                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1660                LOGE("Permission Denial: "
1661                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1662                return PERMISSION_DENIED;
1663            }
1664            break;
1665        }
1666        case CAPTURE_SCREEN:
1667        {
1668            // codes that require permission check
1669            IPCThreadState* ipc = IPCThreadState::self();
1670            const int pid = ipc->getCallingPid();
1671            const int uid = ipc->getCallingUid();
1672            if ((uid != AID_GRAPHICS) &&
1673                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1674                LOGE("Permission Denial: "
1675                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1676                return PERMISSION_DENIED;
1677            }
1678            break;
1679        }
1680    }
1681
1682    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1683    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1684        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1685        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1686            IPCThreadState* ipc = IPCThreadState::self();
1687            const int pid = ipc->getCallingPid();
1688            const int uid = ipc->getCallingUid();
1689            LOGE("Permission Denial: "
1690                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1691            return PERMISSION_DENIED;
1692        }
1693        int n;
1694        switch (code) {
1695            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1696            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1697                return NO_ERROR;
1698            case 1002:  // SHOW_UPDATES
1699                n = data.readInt32();
1700                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1701                invalidateHwcGeometry();
1702                repaintEverything();
1703                return NO_ERROR;
1704            case 1003:  // SHOW_BACKGROUND
1705                n = data.readInt32();
1706                mDebugBackground = n ? 1 : 0;
1707                return NO_ERROR;
1708            case 1004:{ // repaint everything
1709                repaintEverything();
1710                return NO_ERROR;
1711            }
1712            case 1005:{ // force transaction
1713                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1714                return NO_ERROR;
1715            }
1716            case 1006:{ // enable/disable GraphicLog
1717                int enabled = data.readInt32();
1718                GraphicLog::getInstance().setEnabled(enabled);
1719                return NO_ERROR;
1720            }
1721            case 1008:  // toggle use of hw composer
1722                n = data.readInt32();
1723                mDebugDisableHWC = n ? 1 : 0;
1724                invalidateHwcGeometry();
1725                repaintEverything();
1726                return NO_ERROR;
1727            case 1009:  // toggle use of transform hint
1728                n = data.readInt32();
1729                mDebugDisableTransformHint = n ? 1 : 0;
1730                invalidateHwcGeometry();
1731                repaintEverything();
1732                return NO_ERROR;
1733            case 1010:  // interrogate.
1734                reply->writeInt32(0);
1735                reply->writeInt32(0);
1736                reply->writeInt32(mDebugRegion);
1737                reply->writeInt32(mDebugBackground);
1738                return NO_ERROR;
1739            case 1013: {
1740                Mutex::Autolock _l(mStateLock);
1741                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1742                reply->writeInt32(hw.getPageFlipCount());
1743            }
1744            return NO_ERROR;
1745        }
1746    }
1747    return err;
1748}
1749
1750void SurfaceFlinger::repaintEverything() {
1751    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1752    const Rect bounds(hw.getBounds());
1753    setInvalidateRegion(Region(bounds));
1754    signalEvent();
1755}
1756
1757void SurfaceFlinger::setInvalidateRegion(const Region& reg) {
1758    Mutex::Autolock _l(mInvalidateLock);
1759    mInvalidateRegion = reg;
1760}
1761
1762Region SurfaceFlinger::getAndClearInvalidateRegion() {
1763    Mutex::Autolock _l(mInvalidateLock);
1764    Region reg(mInvalidateRegion);
1765    mInvalidateRegion.clear();
1766    return reg;
1767}
1768
1769// ---------------------------------------------------------------------------
1770
1771status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
1772        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1773{
1774    Mutex::Autolock _l(mStateLock);
1775    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
1776}
1777
1778status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1779        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1780{
1781    if (!GLExtensions::getInstance().haveFramebufferObject())
1782        return INVALID_OPERATION;
1783
1784    // get screen geometry
1785    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1786    const uint32_t hw_w = hw.getWidth();
1787    const uint32_t hw_h = hw.getHeight();
1788    GLfloat u = 1;
1789    GLfloat v = 1;
1790
1791    // make sure to clear all GL error flags
1792    while ( glGetError() != GL_NO_ERROR ) ;
1793
1794    // create a FBO
1795    GLuint name, tname;
1796    glGenTextures(1, &tname);
1797    glBindTexture(GL_TEXTURE_2D, tname);
1798    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1799            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1800    if (glGetError() != GL_NO_ERROR) {
1801        while ( glGetError() != GL_NO_ERROR ) ;
1802        GLint tw = (2 << (31 - clz(hw_w)));
1803        GLint th = (2 << (31 - clz(hw_h)));
1804        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1805                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1806        u = GLfloat(hw_w) / tw;
1807        v = GLfloat(hw_h) / th;
1808    }
1809    glGenFramebuffersOES(1, &name);
1810    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1811    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1812            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1813
1814    // redraw the screen entirely...
1815    glDisable(GL_TEXTURE_EXTERNAL_OES);
1816    glDisable(GL_TEXTURE_2D);
1817    glDisable(GL_SCISSOR_TEST);
1818    glClearColor(0,0,0,1);
1819    glClear(GL_COLOR_BUFFER_BIT);
1820    glEnable(GL_SCISSOR_TEST);
1821    glMatrixMode(GL_MODELVIEW);
1822    glLoadIdentity();
1823    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1824    const size_t count = layers.size();
1825    for (size_t i=0 ; i<count ; ++i) {
1826        const sp<LayerBase>& layer(layers[i]);
1827        layer->drawForSreenShot();
1828    }
1829
1830    hw.compositionComplete();
1831
1832    // back to main framebuffer
1833    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1834    glDisable(GL_SCISSOR_TEST);
1835    glDeleteFramebuffersOES(1, &name);
1836
1837    *textureName = tname;
1838    *uOut = u;
1839    *vOut = v;
1840    return NO_ERROR;
1841}
1842
1843// ---------------------------------------------------------------------------
1844
1845status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1846{
1847    // get screen geometry
1848    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1849    const uint32_t hw_w = hw.getWidth();
1850    const uint32_t hw_h = hw.getHeight();
1851    const Region screenBounds(hw.getBounds());
1852
1853    GLfloat u, v;
1854    GLuint tname;
1855    status_t result = renderScreenToTextureLocked(0, &tname, &u, &v);
1856    if (result != NO_ERROR) {
1857        return result;
1858    }
1859
1860    GLfloat vtx[8];
1861    const GLfloat texCoords[4][2] = { {0,0}, {0,v}, {u,v}, {u,0} };
1862    glBindTexture(GL_TEXTURE_2D, tname);
1863    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1864    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1865    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1866    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1867    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1868    glVertexPointer(2, GL_FLOAT, 0, vtx);
1869
1870    /*
1871     * Texture coordinate mapping
1872     *
1873     *                 u
1874     *    1 +----------+---+
1875     *      |     |    |   |  image is inverted
1876     *      |     V    |   |  w.r.t. the texture
1877     *  1-v +----------+   |  coordinates
1878     *      |              |
1879     *      |              |
1880     *      |              |
1881     *    0 +--------------+
1882     *      0              1
1883     *
1884     */
1885
1886    class s_curve_interpolator {
1887        const float nbFrames, s, v;
1888    public:
1889        s_curve_interpolator(int nbFrames, float s)
1890        : nbFrames(1.0f / (nbFrames-1)), s(s),
1891          v(1.0f + expf(-s + 0.5f*s)) {
1892        }
1893        float operator()(int f) {
1894            const float x = f * nbFrames;
1895            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1896        }
1897    };
1898
1899    class v_stretch {
1900        const GLfloat hw_w, hw_h;
1901    public:
1902        v_stretch(uint32_t hw_w, uint32_t hw_h)
1903        : hw_w(hw_w), hw_h(hw_h) {
1904        }
1905        void operator()(GLfloat* vtx, float v) {
1906            const GLfloat w = hw_w + (hw_w * v);
1907            const GLfloat h = hw_h - (hw_h * v);
1908            const GLfloat x = (hw_w - w) * 0.5f;
1909            const GLfloat y = (hw_h - h) * 0.5f;
1910            vtx[0] = x;         vtx[1] = y;
1911            vtx[2] = x;         vtx[3] = y + h;
1912            vtx[4] = x + w;     vtx[5] = y + h;
1913            vtx[6] = x + w;     vtx[7] = y;
1914        }
1915    };
1916
1917    class h_stretch {
1918        const GLfloat hw_w, hw_h;
1919    public:
1920        h_stretch(uint32_t hw_w, uint32_t hw_h)
1921        : hw_w(hw_w), hw_h(hw_h) {
1922        }
1923        void operator()(GLfloat* vtx, float v) {
1924            const GLfloat w = hw_w - (hw_w * v);
1925            const GLfloat h = 1.0f;
1926            const GLfloat x = (hw_w - w) * 0.5f;
1927            const GLfloat y = (hw_h - h) * 0.5f;
1928            vtx[0] = x;         vtx[1] = y;
1929            vtx[2] = x;         vtx[3] = y + h;
1930            vtx[4] = x + w;     vtx[5] = y + h;
1931            vtx[6] = x + w;     vtx[7] = y;
1932        }
1933    };
1934
1935    // the full animation is 24 frames
1936    char value[PROPERTY_VALUE_MAX];
1937    property_get("debug.sf.electron_frames", value, "24");
1938    int nbFrames = (atoi(value) + 1) >> 1;
1939    if (nbFrames <= 0) // just in case
1940        nbFrames = 24;
1941
1942    s_curve_interpolator itr(nbFrames, 7.5f);
1943    s_curve_interpolator itg(nbFrames, 8.0f);
1944    s_curve_interpolator itb(nbFrames, 8.5f);
1945
1946    v_stretch vverts(hw_w, hw_h);
1947
1948    glMatrixMode(GL_TEXTURE);
1949    glLoadIdentity();
1950    glMatrixMode(GL_MODELVIEW);
1951    glLoadIdentity();
1952
1953    glEnable(GL_BLEND);
1954    glBlendFunc(GL_ONE, GL_ONE);
1955    for (int i=0 ; i<nbFrames ; i++) {
1956        float x, y, w, h;
1957        const float vr = itr(i);
1958        const float vg = itg(i);
1959        const float vb = itb(i);
1960
1961        // clear screen
1962        glColorMask(1,1,1,1);
1963        glClear(GL_COLOR_BUFFER_BIT);
1964        glEnable(GL_TEXTURE_2D);
1965
1966        // draw the red plane
1967        vverts(vtx, vr);
1968        glColorMask(1,0,0,1);
1969        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1970
1971        // draw the green plane
1972        vverts(vtx, vg);
1973        glColorMask(0,1,0,1);
1974        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1975
1976        // draw the blue plane
1977        vverts(vtx, vb);
1978        glColorMask(0,0,1,1);
1979        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1980
1981        // draw the white highlight (we use the last vertices)
1982        glDisable(GL_TEXTURE_2D);
1983        glColorMask(1,1,1,1);
1984        glColor4f(vg, vg, vg, 1);
1985        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1986        hw.flip(screenBounds);
1987    }
1988
1989    h_stretch hverts(hw_w, hw_h);
1990    glDisable(GL_BLEND);
1991    glDisable(GL_TEXTURE_2D);
1992    glColorMask(1,1,1,1);
1993    for (int i=0 ; i<nbFrames ; i++) {
1994        const float v = itg(i);
1995        hverts(vtx, v);
1996        glClear(GL_COLOR_BUFFER_BIT);
1997        glColor4f(1-v, 1-v, 1-v, 1);
1998        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1999        hw.flip(screenBounds);
2000    }
2001
2002    glColorMask(1,1,1,1);
2003    glEnable(GL_SCISSOR_TEST);
2004    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2005    glDeleteTextures(1, &tname);
2006    glDisable(GL_TEXTURE_2D);
2007    glDisable(GL_BLEND);
2008    return NO_ERROR;
2009}
2010
2011status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
2012{
2013    status_t result = PERMISSION_DENIED;
2014
2015    if (!GLExtensions::getInstance().haveFramebufferObject())
2016        return INVALID_OPERATION;
2017
2018
2019    // get screen geometry
2020    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2021    const uint32_t hw_w = hw.getWidth();
2022    const uint32_t hw_h = hw.getHeight();
2023    const Region screenBounds(hw.bounds());
2024
2025    GLfloat u, v;
2026    GLuint tname;
2027    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2028    if (result != NO_ERROR) {
2029        return result;
2030    }
2031
2032    GLfloat vtx[8];
2033    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2034    glBindTexture(GL_TEXTURE_2D, tname);
2035    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2036    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2037    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2038    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2039    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2040    glVertexPointer(2, GL_FLOAT, 0, vtx);
2041
2042    class s_curve_interpolator {
2043        const float nbFrames, s, v;
2044    public:
2045        s_curve_interpolator(int nbFrames, float s)
2046        : nbFrames(1.0f / (nbFrames-1)), s(s),
2047          v(1.0f + expf(-s + 0.5f*s)) {
2048        }
2049        float operator()(int f) {
2050            const float x = f * nbFrames;
2051            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2052        }
2053    };
2054
2055    class v_stretch {
2056        const GLfloat hw_w, hw_h;
2057    public:
2058        v_stretch(uint32_t hw_w, uint32_t hw_h)
2059        : hw_w(hw_w), hw_h(hw_h) {
2060        }
2061        void operator()(GLfloat* vtx, float v) {
2062            const GLfloat w = hw_w + (hw_w * v);
2063            const GLfloat h = hw_h - (hw_h * v);
2064            const GLfloat x = (hw_w - w) * 0.5f;
2065            const GLfloat y = (hw_h - h) * 0.5f;
2066            vtx[0] = x;         vtx[1] = y;
2067            vtx[2] = x;         vtx[3] = y + h;
2068            vtx[4] = x + w;     vtx[5] = y + h;
2069            vtx[6] = x + w;     vtx[7] = y;
2070        }
2071    };
2072
2073    class h_stretch {
2074        const GLfloat hw_w, hw_h;
2075    public:
2076        h_stretch(uint32_t hw_w, uint32_t hw_h)
2077        : hw_w(hw_w), hw_h(hw_h) {
2078        }
2079        void operator()(GLfloat* vtx, float v) {
2080            const GLfloat w = hw_w - (hw_w * v);
2081            const GLfloat h = 1.0f;
2082            const GLfloat x = (hw_w - w) * 0.5f;
2083            const GLfloat y = (hw_h - h) * 0.5f;
2084            vtx[0] = x;         vtx[1] = y;
2085            vtx[2] = x;         vtx[3] = y + h;
2086            vtx[4] = x + w;     vtx[5] = y + h;
2087            vtx[6] = x + w;     vtx[7] = y;
2088        }
2089    };
2090
2091    // the full animation is 12 frames
2092    int nbFrames = 8;
2093    s_curve_interpolator itr(nbFrames, 7.5f);
2094    s_curve_interpolator itg(nbFrames, 8.0f);
2095    s_curve_interpolator itb(nbFrames, 8.5f);
2096
2097    h_stretch hverts(hw_w, hw_h);
2098    glDisable(GL_BLEND);
2099    glDisable(GL_TEXTURE_2D);
2100    glColorMask(1,1,1,1);
2101    for (int i=nbFrames-1 ; i>=0 ; i--) {
2102        const float v = itg(i);
2103        hverts(vtx, v);
2104        glClear(GL_COLOR_BUFFER_BIT);
2105        glColor4f(1-v, 1-v, 1-v, 1);
2106        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2107        hw.flip(screenBounds);
2108    }
2109
2110    nbFrames = 4;
2111    v_stretch vverts(hw_w, hw_h);
2112    glEnable(GL_BLEND);
2113    glBlendFunc(GL_ONE, GL_ONE);
2114    for (int i=nbFrames-1 ; i>=0 ; i--) {
2115        float x, y, w, h;
2116        const float vr = itr(i);
2117        const float vg = itg(i);
2118        const float vb = itb(i);
2119
2120        // clear screen
2121        glColorMask(1,1,1,1);
2122        glClear(GL_COLOR_BUFFER_BIT);
2123        glEnable(GL_TEXTURE_2D);
2124
2125        // draw the red plane
2126        vverts(vtx, vr);
2127        glColorMask(1,0,0,1);
2128        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2129
2130        // draw the green plane
2131        vverts(vtx, vg);
2132        glColorMask(0,1,0,1);
2133        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2134
2135        // draw the blue plane
2136        vverts(vtx, vb);
2137        glColorMask(0,0,1,1);
2138        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2139
2140        hw.flip(screenBounds);
2141    }
2142
2143    glColorMask(1,1,1,1);
2144    glEnable(GL_SCISSOR_TEST);
2145    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2146    glDeleteTextures(1, &tname);
2147    glDisable(GL_TEXTURE_2D);
2148    glDisable(GL_BLEND);
2149
2150    return NO_ERROR;
2151}
2152
2153// ---------------------------------------------------------------------------
2154
2155status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2156{
2157    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2158    if (!hw.canDraw()) {
2159        // we're already off
2160        return NO_ERROR;
2161    }
2162
2163    // turn off hwc while we're doing the animation
2164    hw.getHwComposer().disable();
2165    // and make sure to turn it back on (if needed) next time we compose
2166    invalidateHwcGeometry();
2167
2168    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2169        electronBeamOffAnimationImplLocked();
2170    }
2171
2172    // always clear the whole screen at the end of the animation
2173    glClearColor(0,0,0,1);
2174    glDisable(GL_SCISSOR_TEST);
2175    glClear(GL_COLOR_BUFFER_BIT);
2176    glEnable(GL_SCISSOR_TEST);
2177    hw.flip( Region(hw.bounds()) );
2178
2179    return NO_ERROR;
2180}
2181
2182status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2183{
2184    class MessageTurnElectronBeamOff : public MessageBase {
2185        SurfaceFlinger* flinger;
2186        int32_t mode;
2187        status_t result;
2188    public:
2189        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2190            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2191        }
2192        status_t getResult() const {
2193            return result;
2194        }
2195        virtual bool handler() {
2196            Mutex::Autolock _l(flinger->mStateLock);
2197            result = flinger->turnElectronBeamOffImplLocked(mode);
2198            return true;
2199        }
2200    };
2201
2202    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2203    status_t res = postMessageSync(msg);
2204    if (res == NO_ERROR) {
2205        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2206
2207        // work-around: when the power-manager calls us we activate the
2208        // animation. eventually, the "on" animation will be called
2209        // by the power-manager itself
2210        mElectronBeamAnimationMode = mode;
2211    }
2212    return res;
2213}
2214
2215// ---------------------------------------------------------------------------
2216
2217status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2218{
2219    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2220    if (hw.canDraw()) {
2221        // we're already on
2222        return NO_ERROR;
2223    }
2224    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2225        electronBeamOnAnimationImplLocked();
2226    }
2227
2228    // make sure to redraw the whole screen when the animation is done
2229    mDirtyRegion.set(hw.bounds());
2230    signalEvent();
2231
2232    return NO_ERROR;
2233}
2234
2235status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2236{
2237    class MessageTurnElectronBeamOn : public MessageBase {
2238        SurfaceFlinger* flinger;
2239        int32_t mode;
2240        status_t result;
2241    public:
2242        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2243            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2244        }
2245        status_t getResult() const {
2246            return result;
2247        }
2248        virtual bool handler() {
2249            Mutex::Autolock _l(flinger->mStateLock);
2250            result = flinger->turnElectronBeamOnImplLocked(mode);
2251            return true;
2252        }
2253    };
2254
2255    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2256    return NO_ERROR;
2257}
2258
2259// ---------------------------------------------------------------------------
2260
2261status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2262        sp<IMemoryHeap>* heap,
2263        uint32_t* w, uint32_t* h, PixelFormat* f,
2264        uint32_t sw, uint32_t sh,
2265        uint32_t minLayerZ, uint32_t maxLayerZ)
2266{
2267    status_t result = PERMISSION_DENIED;
2268
2269    // only one display supported for now
2270    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2271        return BAD_VALUE;
2272
2273    if (!GLExtensions::getInstance().haveFramebufferObject())
2274        return INVALID_OPERATION;
2275
2276    // get screen geometry
2277    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2278    const uint32_t hw_w = hw.getWidth();
2279    const uint32_t hw_h = hw.getHeight();
2280
2281    if ((sw > hw_w) || (sh > hw_h))
2282        return BAD_VALUE;
2283
2284    sw = (!sw) ? hw_w : sw;
2285    sh = (!sh) ? hw_h : sh;
2286    const size_t size = sw * sh * 4;
2287
2288    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2289    //        sw, sh, minLayerZ, maxLayerZ);
2290
2291    // make sure to clear all GL error flags
2292    while ( glGetError() != GL_NO_ERROR ) ;
2293
2294    // create a FBO
2295    GLuint name, tname;
2296    glGenRenderbuffersOES(1, &tname);
2297    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2298    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2299    glGenFramebuffersOES(1, &name);
2300    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2301    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2302            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2303
2304    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2305
2306    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2307
2308        // invert everything, b/c glReadPixel() below will invert the FB
2309        glViewport(0, 0, sw, sh);
2310        glScissor(0, 0, sw, sh);
2311        glEnable(GL_SCISSOR_TEST);
2312        glMatrixMode(GL_PROJECTION);
2313        glPushMatrix();
2314        glLoadIdentity();
2315        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2316        glMatrixMode(GL_MODELVIEW);
2317
2318        // redraw the screen entirely...
2319        glClearColor(0,0,0,1);
2320        glClear(GL_COLOR_BUFFER_BIT);
2321
2322        const LayerVector& layers(mDrawingState.layersSortedByZ);
2323        const size_t count = layers.size();
2324        for (size_t i=0 ; i<count ; ++i) {
2325            const sp<LayerBase>& layer(layers[i]);
2326            const uint32_t flags = layer->drawingState().flags;
2327            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2328                const uint32_t z = layer->drawingState().z;
2329                if (z >= minLayerZ && z <= maxLayerZ) {
2330                    layer->drawForSreenShot();
2331                }
2332            }
2333        }
2334
2335        // XXX: this is needed on tegra
2336        glEnable(GL_SCISSOR_TEST);
2337        glScissor(0, 0, sw, sh);
2338
2339        // check for errors and return screen capture
2340        if (glGetError() != GL_NO_ERROR) {
2341            // error while rendering
2342            result = INVALID_OPERATION;
2343        } else {
2344            // allocate shared memory large enough to hold the
2345            // screen capture
2346            sp<MemoryHeapBase> base(
2347                    new MemoryHeapBase(size, 0, "screen-capture") );
2348            void* const ptr = base->getBase();
2349            if (ptr) {
2350                // capture the screen with glReadPixels()
2351                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2352                if (glGetError() == GL_NO_ERROR) {
2353                    *heap = base;
2354                    *w = sw;
2355                    *h = sh;
2356                    *f = PIXEL_FORMAT_RGBA_8888;
2357                    result = NO_ERROR;
2358                }
2359            } else {
2360                result = NO_MEMORY;
2361            }
2362        }
2363        glEnable(GL_SCISSOR_TEST);
2364        glViewport(0, 0, hw_w, hw_h);
2365        glMatrixMode(GL_PROJECTION);
2366        glPopMatrix();
2367        glMatrixMode(GL_MODELVIEW);
2368    } else {
2369        result = BAD_VALUE;
2370    }
2371
2372    // release FBO resources
2373    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2374    glDeleteRenderbuffersOES(1, &tname);
2375    glDeleteFramebuffersOES(1, &name);
2376
2377    hw.compositionComplete();
2378
2379    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2380
2381    return result;
2382}
2383
2384
2385status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2386        sp<IMemoryHeap>* heap,
2387        uint32_t* width, uint32_t* height, PixelFormat* format,
2388        uint32_t sw, uint32_t sh,
2389        uint32_t minLayerZ, uint32_t maxLayerZ)
2390{
2391    // only one display supported for now
2392    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2393        return BAD_VALUE;
2394
2395    if (!GLExtensions::getInstance().haveFramebufferObject())
2396        return INVALID_OPERATION;
2397
2398    class MessageCaptureScreen : public MessageBase {
2399        SurfaceFlinger* flinger;
2400        DisplayID dpy;
2401        sp<IMemoryHeap>* heap;
2402        uint32_t* w;
2403        uint32_t* h;
2404        PixelFormat* f;
2405        uint32_t sw;
2406        uint32_t sh;
2407        uint32_t minLayerZ;
2408        uint32_t maxLayerZ;
2409        status_t result;
2410    public:
2411        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2412                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2413                uint32_t sw, uint32_t sh,
2414                uint32_t minLayerZ, uint32_t maxLayerZ)
2415            : flinger(flinger), dpy(dpy),
2416              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2417              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2418              result(PERMISSION_DENIED)
2419        {
2420        }
2421        status_t getResult() const {
2422            return result;
2423        }
2424        virtual bool handler() {
2425            Mutex::Autolock _l(flinger->mStateLock);
2426
2427            // if we have secure windows, never allow the screen capture
2428            if (flinger->mSecureFrameBuffer)
2429                return true;
2430
2431            result = flinger->captureScreenImplLocked(dpy,
2432                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2433
2434            return true;
2435        }
2436    };
2437
2438    sp<MessageBase> msg = new MessageCaptureScreen(this,
2439            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2440    status_t res = postMessageSync(msg);
2441    if (res == NO_ERROR) {
2442        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2443    }
2444    return res;
2445}
2446
2447// ---------------------------------------------------------------------------
2448
2449sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2450{
2451    sp<Layer> result;
2452    Mutex::Autolock _l(mStateLock);
2453    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2454    return result;
2455}
2456
2457// ---------------------------------------------------------------------------
2458
2459Client::Client(const sp<SurfaceFlinger>& flinger)
2460    : mFlinger(flinger), mNameGenerator(1)
2461{
2462}
2463
2464Client::~Client()
2465{
2466    const size_t count = mLayers.size();
2467    for (size_t i=0 ; i<count ; i++) {
2468        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2469        if (layer != 0) {
2470            mFlinger->removeLayer(layer);
2471        }
2472    }
2473}
2474
2475status_t Client::initCheck() const {
2476    return NO_ERROR;
2477}
2478
2479size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2480{
2481    Mutex::Autolock _l(mLock);
2482    size_t name = mNameGenerator++;
2483    mLayers.add(name, layer);
2484    return name;
2485}
2486
2487void Client::detachLayer(const LayerBaseClient* layer)
2488{
2489    Mutex::Autolock _l(mLock);
2490    // we do a linear search here, because this doesn't happen often
2491    const size_t count = mLayers.size();
2492    for (size_t i=0 ; i<count ; i++) {
2493        if (mLayers.valueAt(i) == layer) {
2494            mLayers.removeItemsAt(i, 1);
2495            break;
2496        }
2497    }
2498}
2499sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2500{
2501    Mutex::Autolock _l(mLock);
2502    sp<LayerBaseClient> lbc;
2503    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2504    if (layer != 0) {
2505        lbc = layer.promote();
2506        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2507    }
2508    return lbc;
2509}
2510
2511
2512status_t Client::onTransact(
2513    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2514{
2515    // these must be checked
2516     IPCThreadState* ipc = IPCThreadState::self();
2517     const int pid = ipc->getCallingPid();
2518     const int uid = ipc->getCallingUid();
2519     const int self_pid = getpid();
2520     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2521         // we're called from a different process, do the real check
2522         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2523         {
2524             LOGE("Permission Denial: "
2525                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2526             return PERMISSION_DENIED;
2527         }
2528     }
2529     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2530}
2531
2532
2533sp<ISurface> Client::createSurface(
2534        ISurfaceComposerClient::surface_data_t* params,
2535        const String8& name,
2536        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2537        uint32_t flags)
2538{
2539    /*
2540     * createSurface must be called from the GL thread so that it can
2541     * have access to the GL context.
2542     */
2543
2544    class MessageCreateSurface : public MessageBase {
2545        sp<ISurface> result;
2546        SurfaceFlinger* flinger;
2547        ISurfaceComposerClient::surface_data_t* params;
2548        Client* client;
2549        const String8& name;
2550        DisplayID display;
2551        uint32_t w, h;
2552        PixelFormat format;
2553        uint32_t flags;
2554    public:
2555        MessageCreateSurface(SurfaceFlinger* flinger,
2556                ISurfaceComposerClient::surface_data_t* params,
2557                const String8& name, Client* client,
2558                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2559                uint32_t flags)
2560            : flinger(flinger), params(params), client(client), name(name),
2561              display(display), w(w), h(h), format(format), flags(flags)
2562        {
2563        }
2564        sp<ISurface> getResult() const { return result; }
2565        virtual bool handler() {
2566            result = flinger->createSurface(params, name, client,
2567                    display, w, h, format, flags);
2568            return true;
2569        }
2570    };
2571
2572    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2573            params, name, this, display, w, h, format, flags);
2574    mFlinger->postMessageSync(msg);
2575    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2576}
2577status_t Client::destroySurface(SurfaceID sid) {
2578    return mFlinger->removeSurface(this, sid);
2579}
2580
2581// ---------------------------------------------------------------------------
2582
2583GraphicBufferAlloc::GraphicBufferAlloc() {}
2584
2585GraphicBufferAlloc::~GraphicBufferAlloc() {}
2586
2587sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2588        PixelFormat format, uint32_t usage, status_t* error) {
2589    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2590    status_t err = graphicBuffer->initCheck();
2591    *error = err;
2592    if (err != 0 || graphicBuffer->handle == 0) {
2593        if (err == NO_MEMORY) {
2594            GraphicBuffer::dumpAllocationsToSystemLog();
2595        }
2596        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2597             "failed (%s), handle=%p",
2598                w, h, strerror(-err), graphicBuffer->handle);
2599        return 0;
2600    }
2601    return graphicBuffer;
2602}
2603
2604// ---------------------------------------------------------------------------
2605
2606GraphicPlane::GraphicPlane()
2607    : mHw(0)
2608{
2609}
2610
2611GraphicPlane::~GraphicPlane() {
2612    delete mHw;
2613}
2614
2615bool GraphicPlane::initialized() const {
2616    return mHw ? true : false;
2617}
2618
2619int GraphicPlane::getWidth() const {
2620    return mWidth;
2621}
2622
2623int GraphicPlane::getHeight() const {
2624    return mHeight;
2625}
2626
2627void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2628{
2629    mHw = hw;
2630
2631    // initialize the display orientation transform.
2632    // it's a constant that should come from the display driver.
2633    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2634    char property[PROPERTY_VALUE_MAX];
2635    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2636        //displayOrientation
2637        switch (atoi(property)) {
2638        case 90:
2639            displayOrientation = ISurfaceComposer::eOrientation90;
2640            break;
2641        case 270:
2642            displayOrientation = ISurfaceComposer::eOrientation270;
2643            break;
2644        }
2645    }
2646
2647    const float w = hw->getWidth();
2648    const float h = hw->getHeight();
2649    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2650            &mDisplayTransform);
2651    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2652        mDisplayWidth = h;
2653        mDisplayHeight = w;
2654    } else {
2655        mDisplayWidth = w;
2656        mDisplayHeight = h;
2657    }
2658
2659    setOrientation(ISurfaceComposer::eOrientationDefault);
2660}
2661
2662status_t GraphicPlane::orientationToTransfrom(
2663        int orientation, int w, int h, Transform* tr)
2664{
2665    uint32_t flags = 0;
2666    switch (orientation) {
2667    case ISurfaceComposer::eOrientationDefault:
2668        flags = Transform::ROT_0;
2669        break;
2670    case ISurfaceComposer::eOrientation90:
2671        flags = Transform::ROT_90;
2672        break;
2673    case ISurfaceComposer::eOrientation180:
2674        flags = Transform::ROT_180;
2675        break;
2676    case ISurfaceComposer::eOrientation270:
2677        flags = Transform::ROT_270;
2678        break;
2679    default:
2680        return BAD_VALUE;
2681    }
2682    tr->set(flags, w, h);
2683    return NO_ERROR;
2684}
2685
2686status_t GraphicPlane::setOrientation(int orientation)
2687{
2688    // If the rotation can be handled in hardware, this is where
2689    // the magic should happen.
2690
2691    const DisplayHardware& hw(displayHardware());
2692    const float w = mDisplayWidth;
2693    const float h = mDisplayHeight;
2694    mWidth = int(w);
2695    mHeight = int(h);
2696
2697    Transform orientationTransform;
2698    GraphicPlane::orientationToTransfrom(orientation, w, h,
2699            &orientationTransform);
2700    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2701        mWidth = int(h);
2702        mHeight = int(w);
2703    }
2704
2705    mOrientation = orientation;
2706    mGlobalTransform = mDisplayTransform * orientationTransform;
2707    return NO_ERROR;
2708}
2709
2710const DisplayHardware& GraphicPlane::displayHardware() const {
2711    return *mHw;
2712}
2713
2714DisplayHardware& GraphicPlane::editDisplayHardware() {
2715    return *mHw;
2716}
2717
2718const Transform& GraphicPlane::transform() const {
2719    return mGlobalTransform;
2720}
2721
2722EGLDisplay GraphicPlane::getEGLDisplay() const {
2723    return mHw->getEGLDisplay();
2724}
2725
2726// ---------------------------------------------------------------------------
2727
2728}; // namespace android
2729