SurfaceFlinger.cpp revision a3aefeb1c31618dcc897da22d2d2f741104e3fe3 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35
36#include <utils/String8.h>
37#include <utils/String16.h>
38#include <utils/StopWatch.h>
39
40#include <ui/GraphicBufferAllocator.h>
41#include <ui/GraphicLog.h>
42#include <ui/PixelFormat.h>
43
44#include <pixelflinger/pixelflinger.h>
45#include <GLES/gl.h>
46
47#include "clz.h"
48#include "GLExtensions.h"
49#include "Layer.h"
50#include "LayerBlur.h"
51#include "LayerBuffer.h"
52#include "LayerDim.h"
53#include "SurfaceFlinger.h"
54
55#include "DisplayHardware/DisplayHardware.h"
56#include "DisplayHardware/HWComposer.h"
57
58/* ideally AID_GRAPHICS would be in a semi-public header
59 * or there would be a way to map a user/group name to its id
60 */
61#ifndef AID_GRAPHICS
62#define AID_GRAPHICS 1003
63#endif
64
65#define DISPLAY_COUNT       1
66
67namespace android {
68// ---------------------------------------------------------------------------
69
70SurfaceFlinger::SurfaceFlinger()
71    :   BnSurfaceComposer(), Thread(false),
72        mTransactionFlags(0),
73        mTransactionCount(0),
74        mResizeTransationPending(false),
75        mLayersRemoved(false),
76        mBootTime(systemTime()),
77        mHardwareTest("android.permission.HARDWARE_TEST"),
78        mAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER"),
79        mReadFramebuffer("android.permission.READ_FRAME_BUFFER"),
80        mDump("android.permission.DUMP"),
81        mVisibleRegionsDirty(false),
82        mHwWorkListDirty(false),
83        mDeferReleaseConsole(false),
84        mFreezeDisplay(false),
85        mFreezeCount(0),
86        mFreezeDisplayTime(0),
87        mDebugRegion(0),
88        mDebugBackground(0),
89        mDebugDisableHWC(0),
90        mDebugInSwapBuffers(0),
91        mLastSwapBufferTime(0),
92        mDebugInTransaction(0),
93        mLastTransactionTime(0),
94        mBootFinished(false),
95        mConsoleSignals(0),
96        mSecureFrameBuffer(0)
97{
98    init();
99}
100
101void SurfaceFlinger::init()
102{
103    LOGI("SurfaceFlinger is starting");
104
105    // debugging stuff...
106    char value[PROPERTY_VALUE_MAX];
107    property_get("debug.sf.showupdates", value, "0");
108    mDebugRegion = atoi(value);
109    property_get("debug.sf.showbackground", value, "0");
110    mDebugBackground = atoi(value);
111
112    LOGI_IF(mDebugRegion,       "showupdates enabled");
113    LOGI_IF(mDebugBackground,   "showbackground enabled");
114}
115
116SurfaceFlinger::~SurfaceFlinger()
117{
118    glDeleteTextures(1, &mWormholeTexName);
119}
120
121overlay_control_device_t* SurfaceFlinger::getOverlayEngine() const
122{
123    return graphicPlane(0).displayHardware().getOverlayEngine();
124}
125
126sp<IMemoryHeap> SurfaceFlinger::getCblk() const
127{
128    return mServerHeap;
129}
130
131sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
132{
133    sp<ISurfaceComposerClient> bclient;
134    sp<Client> client(new Client(this));
135    status_t err = client->initCheck();
136    if (err == NO_ERROR) {
137        bclient = client;
138    }
139    return bclient;
140}
141
142sp<ISurfaceComposerClient> SurfaceFlinger::createClientConnection()
143{
144    sp<ISurfaceComposerClient> bclient;
145    sp<UserClient> client(new UserClient(this));
146    status_t err = client->initCheck();
147    if (err == NO_ERROR) {
148        bclient = client;
149    }
150    return bclient;
151}
152
153
154const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
155{
156    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
157    const GraphicPlane& plane(mGraphicPlanes[dpy]);
158    return plane;
159}
160
161GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
162{
163    return const_cast<GraphicPlane&>(
164        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
165}
166
167void SurfaceFlinger::bootFinished()
168{
169    const nsecs_t now = systemTime();
170    const nsecs_t duration = now - mBootTime;
171    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
172    mBootFinished = true;
173    property_set("ctl.stop", "bootanim");
174}
175
176void SurfaceFlinger::onFirstRef()
177{
178    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
179
180    // Wait for the main thread to be done with its initialization
181    mReadyToRunBarrier.wait();
182}
183
184static inline uint16_t pack565(int r, int g, int b) {
185    return (r<<11)|(g<<5)|b;
186}
187
188status_t SurfaceFlinger::readyToRun()
189{
190    LOGI(   "SurfaceFlinger's main thread ready to run. "
191            "Initializing graphics H/W...");
192
193    // we only support one display currently
194    int dpy = 0;
195
196    {
197        // initialize the main display
198        GraphicPlane& plane(graphicPlane(dpy));
199        DisplayHardware* const hw = new DisplayHardware(this, dpy);
200        plane.setDisplayHardware(hw);
201    }
202
203    // create the shared control-block
204    mServerHeap = new MemoryHeapBase(4096,
205            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
206    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
207
208    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
209    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
210
211    new(mServerCblk) surface_flinger_cblk_t;
212
213    // initialize primary screen
214    // (other display should be initialized in the same manner, but
215    // asynchronously, as they could come and go. None of this is supported
216    // yet).
217    const GraphicPlane& plane(graphicPlane(dpy));
218    const DisplayHardware& hw = plane.displayHardware();
219    const uint32_t w = hw.getWidth();
220    const uint32_t h = hw.getHeight();
221    const uint32_t f = hw.getFormat();
222    hw.makeCurrent();
223
224    // initialize the shared control block
225    mServerCblk->connected |= 1<<dpy;
226    display_cblk_t* dcblk = mServerCblk->displays + dpy;
227    memset(dcblk, 0, sizeof(display_cblk_t));
228    dcblk->w            = plane.getWidth();
229    dcblk->h            = plane.getHeight();
230    dcblk->format       = f;
231    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
232    dcblk->xdpi         = hw.getDpiX();
233    dcblk->ydpi         = hw.getDpiY();
234    dcblk->fps          = hw.getRefreshRate();
235    dcblk->density      = hw.getDensity();
236
237    // Initialize OpenGL|ES
238    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
239    glPixelStorei(GL_PACK_ALIGNMENT, 4);
240    glEnableClientState(GL_VERTEX_ARRAY);
241    glEnable(GL_SCISSOR_TEST);
242    glShadeModel(GL_FLAT);
243    glDisable(GL_DITHER);
244    glDisable(GL_CULL_FACE);
245
246    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
247    const uint16_t g1 = pack565(0x17,0x2f,0x17);
248    const uint16_t textureData[4] = { g0, g1, g1, g0 };
249    glGenTextures(1, &mWormholeTexName);
250    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
251    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
252    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
253    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
254    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
255    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
256            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
257
258    glViewport(0, 0, w, h);
259    glMatrixMode(GL_PROJECTION);
260    glLoadIdentity();
261    glOrthof(0, w, h, 0, 0, 1);
262
263   LayerDim::initDimmer(this, w, h);
264
265    mReadyToRunBarrier.open();
266
267    /*
268     *  We're now ready to accept clients...
269     */
270
271    // start boot animation
272    property_set("ctl.start", "bootanim");
273
274    return NO_ERROR;
275}
276
277// ----------------------------------------------------------------------------
278#if 0
279#pragma mark -
280#pragma mark Events Handler
281#endif
282
283void SurfaceFlinger::waitForEvent()
284{
285    while (true) {
286        nsecs_t timeout = -1;
287        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
288        if (UNLIKELY(isFrozen())) {
289            // wait 5 seconds
290            const nsecs_t now = systemTime();
291            if (mFreezeDisplayTime == 0) {
292                mFreezeDisplayTime = now;
293            }
294            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
295            timeout = waitTime>0 ? waitTime : 0;
296        }
297
298        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
299
300        // see if we timed out
301        if (isFrozen()) {
302            const nsecs_t now = systemTime();
303            nsecs_t frozenTime = (now - mFreezeDisplayTime);
304            if (frozenTime >= freezeDisplayTimeout) {
305                // we timed out and are still frozen
306                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
307                        mFreezeDisplay, mFreezeCount);
308                mFreezeDisplayTime = 0;
309                mFreezeCount = 0;
310                mFreezeDisplay = false;
311            }
312        }
313
314        if (msg != 0) {
315            switch (msg->what) {
316                case MessageQueue::INVALIDATE:
317                    // invalidate message, just return to the main loop
318                    return;
319            }
320        }
321    }
322}
323
324void SurfaceFlinger::signalEvent() {
325    mEventQueue.invalidate();
326}
327
328void SurfaceFlinger::signal() const {
329    // this is the IPC call
330    const_cast<SurfaceFlinger*>(this)->signalEvent();
331}
332
333status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
334        nsecs_t reltime, uint32_t flags)
335{
336    return mEventQueue.postMessage(msg, reltime, flags);
337}
338
339status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
340        nsecs_t reltime, uint32_t flags)
341{
342    status_t res = mEventQueue.postMessage(msg, reltime, flags);
343    if (res == NO_ERROR) {
344        msg->wait();
345    }
346    return res;
347}
348
349// ----------------------------------------------------------------------------
350#if 0
351#pragma mark -
352#pragma mark Main loop
353#endif
354
355bool SurfaceFlinger::threadLoop()
356{
357    waitForEvent();
358
359    // check for transactions
360    if (UNLIKELY(mConsoleSignals)) {
361        handleConsoleEvents();
362    }
363
364    if (LIKELY(mTransactionCount == 0)) {
365        // if we're in a global transaction, don't do anything.
366        const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
367        uint32_t transactionFlags = getTransactionFlags(mask);
368        if (LIKELY(transactionFlags)) {
369            handleTransaction(transactionFlags);
370        }
371    }
372
373    // post surfaces (if needed)
374    handlePageFlip();
375
376    if (UNLIKELY(mHwWorkListDirty)) {
377        // build the h/w work list
378        handleWorkList();
379    }
380
381    const DisplayHardware& hw(graphicPlane(0).displayHardware());
382    if (LIKELY(hw.canDraw() && !isFrozen())) {
383        // repaint the framebuffer (if needed)
384
385        const int index = hw.getCurrentBufferIndex();
386        GraphicLog& logger(GraphicLog::getInstance());
387
388        logger.log(GraphicLog::SF_REPAINT, index);
389        handleRepaint();
390
391        // inform the h/w that we're done compositing
392        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
393        hw.compositionComplete();
394
395        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
396        postFramebuffer();
397
398        logger.log(GraphicLog::SF_UNLOCK_CLIENTS, index);
399        unlockClients();
400
401        logger.log(GraphicLog::SF_REPAINT_DONE, index);
402    } else {
403        // pretend we did the post
404        unlockClients();
405        usleep(16667); // 60 fps period
406    }
407    return true;
408}
409
410void SurfaceFlinger::postFramebuffer()
411{
412    if (!mInvalidRegion.isEmpty()) {
413        const DisplayHardware& hw(graphicPlane(0).displayHardware());
414        const nsecs_t now = systemTime();
415        mDebugInSwapBuffers = now;
416        hw.flip(mInvalidRegion);
417        mLastSwapBufferTime = systemTime() - now;
418        mDebugInSwapBuffers = 0;
419        mInvalidRegion.clear();
420    }
421}
422
423void SurfaceFlinger::handleConsoleEvents()
424{
425    // something to do with the console
426    const DisplayHardware& hw = graphicPlane(0).displayHardware();
427
428    int what = android_atomic_and(0, &mConsoleSignals);
429    if (what & eConsoleAcquired) {
430        hw.acquireScreen();
431    }
432
433    if (mDeferReleaseConsole && hw.canDraw()) {
434        // We got the release signal before the acquire signal
435        mDeferReleaseConsole = false;
436        hw.releaseScreen();
437    }
438
439    if (what & eConsoleReleased) {
440        if (hw.canDraw()) {
441            hw.releaseScreen();
442        } else {
443            mDeferReleaseConsole = true;
444        }
445    }
446
447    mDirtyRegion.set(hw.bounds());
448}
449
450void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
451{
452    Vector< sp<LayerBase> > ditchedLayers;
453
454    /*
455     * Perform and commit the transaction
456     */
457
458    { // scope for the lock
459        Mutex::Autolock _l(mStateLock);
460        const nsecs_t now = systemTime();
461        mDebugInTransaction = now;
462        handleTransactionLocked(transactionFlags, ditchedLayers);
463        mLastTransactionTime = systemTime() - now;
464        mDebugInTransaction = 0;
465        mHwWorkListDirty = true;
466        // here the transaction has been committed
467    }
468
469    /*
470     * Clean-up all layers that went away
471     * (do this without the lock held)
472     */
473
474    const size_t count = ditchedLayers.size();
475    for (size_t i=0 ; i<count ; i++) {
476        if (ditchedLayers[i] != 0) {
477            //LOGD("ditching layer %p", ditchedLayers[i].get());
478            ditchedLayers[i]->ditch();
479        }
480    }
481}
482
483void SurfaceFlinger::handleTransactionLocked(
484        uint32_t transactionFlags, Vector< sp<LayerBase> >& ditchedLayers)
485{
486    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
487    const size_t count = currentLayers.size();
488
489    /*
490     * Traversal of the children
491     * (perform the transaction for each of them if needed)
492     */
493
494    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
495    if (layersNeedTransaction) {
496        for (size_t i=0 ; i<count ; i++) {
497            const sp<LayerBase>& layer = currentLayers[i];
498            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
499            if (!trFlags) continue;
500
501            const uint32_t flags = layer->doTransaction(0);
502            if (flags & Layer::eVisibleRegion)
503                mVisibleRegionsDirty = true;
504        }
505    }
506
507    /*
508     * Perform our own transaction if needed
509     */
510
511    if (transactionFlags & eTransactionNeeded) {
512        if (mCurrentState.orientation != mDrawingState.orientation) {
513            // the orientation has changed, recompute all visible regions
514            // and invalidate everything.
515
516            const int dpy = 0;
517            const int orientation = mCurrentState.orientation;
518            const uint32_t type = mCurrentState.orientationType;
519            GraphicPlane& plane(graphicPlane(dpy));
520            plane.setOrientation(orientation);
521
522            // update the shared control block
523            const DisplayHardware& hw(plane.displayHardware());
524            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
525            dcblk->orientation = orientation;
526            dcblk->w = plane.getWidth();
527            dcblk->h = plane.getHeight();
528
529            mVisibleRegionsDirty = true;
530            mDirtyRegion.set(hw.bounds());
531        }
532
533        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
534            // freezing or unfreezing the display -> trigger animation if needed
535            mFreezeDisplay = mCurrentState.freezeDisplay;
536            if (mFreezeDisplay)
537                 mFreezeDisplayTime = 0;
538        }
539
540        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
541            // layers have been added
542            mVisibleRegionsDirty = true;
543        }
544
545        // some layers might have been removed, so
546        // we need to update the regions they're exposing.
547        if (mLayersRemoved) {
548            mLayersRemoved = false;
549            mVisibleRegionsDirty = true;
550            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
551            const size_t count = previousLayers.size();
552            for (size_t i=0 ; i<count ; i++) {
553                const sp<LayerBase>& layer(previousLayers[i]);
554                if (currentLayers.indexOf( layer ) < 0) {
555                    // this layer is not visible anymore
556                    ditchedLayers.add(layer);
557                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
558                }
559            }
560        }
561    }
562
563    commitTransaction();
564}
565
566sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
567{
568    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
569}
570
571void SurfaceFlinger::computeVisibleRegions(
572    LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
573{
574    const GraphicPlane& plane(graphicPlane(0));
575    const Transform& planeTransform(plane.transform());
576    const DisplayHardware& hw(plane.displayHardware());
577    const Region screenRegion(hw.bounds());
578
579    Region aboveOpaqueLayers;
580    Region aboveCoveredLayers;
581    Region dirty;
582
583    bool secureFrameBuffer = false;
584
585    size_t i = currentLayers.size();
586    while (i--) {
587        const sp<LayerBase>& layer = currentLayers[i];
588        layer->validateVisibility(planeTransform);
589
590        // start with the whole surface at its current location
591        const Layer::State& s(layer->drawingState());
592
593        /*
594         * opaqueRegion: area of a surface that is fully opaque.
595         */
596        Region opaqueRegion;
597
598        /*
599         * visibleRegion: area of a surface that is visible on screen
600         * and not fully transparent. This is essentially the layer's
601         * footprint minus the opaque regions above it.
602         * Areas covered by a translucent surface are considered visible.
603         */
604        Region visibleRegion;
605
606        /*
607         * coveredRegion: area of a surface that is covered by all
608         * visible regions above it (which includes the translucent areas).
609         */
610        Region coveredRegion;
611
612
613        // handle hidden surfaces by setting the visible region to empty
614        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
615            const bool translucent = layer->needsBlending();
616            const Rect bounds(layer->visibleBounds());
617            visibleRegion.set(bounds);
618            visibleRegion.andSelf(screenRegion);
619            if (!visibleRegion.isEmpty()) {
620                // Remove the transparent area from the visible region
621                if (translucent) {
622                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
623                }
624
625                // compute the opaque region
626                const int32_t layerOrientation = layer->getOrientation();
627                if (s.alpha==255 && !translucent &&
628                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
629                    // the opaque region is the layer's footprint
630                    opaqueRegion = visibleRegion;
631                }
632            }
633        }
634
635        // Clip the covered region to the visible region
636        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
637
638        // Update aboveCoveredLayers for next (lower) layer
639        aboveCoveredLayers.orSelf(visibleRegion);
640
641        // subtract the opaque region covered by the layers above us
642        visibleRegion.subtractSelf(aboveOpaqueLayers);
643
644        // compute this layer's dirty region
645        if (layer->contentDirty) {
646            // we need to invalidate the whole region
647            dirty = visibleRegion;
648            // as well, as the old visible region
649            dirty.orSelf(layer->visibleRegionScreen);
650            layer->contentDirty = false;
651        } else {
652            /* compute the exposed region:
653             *   the exposed region consists of two components:
654             *   1) what's VISIBLE now and was COVERED before
655             *   2) what's EXPOSED now less what was EXPOSED before
656             *
657             * note that (1) is conservative, we start with the whole
658             * visible region but only keep what used to be covered by
659             * something -- which mean it may have been exposed.
660             *
661             * (2) handles areas that were not covered by anything but got
662             * exposed because of a resize.
663             */
664            const Region newExposed = visibleRegion - coveredRegion;
665            const Region oldVisibleRegion = layer->visibleRegionScreen;
666            const Region oldCoveredRegion = layer->coveredRegionScreen;
667            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
668            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
669        }
670        dirty.subtractSelf(aboveOpaqueLayers);
671
672        // accumulate to the screen dirty region
673        dirtyRegion.orSelf(dirty);
674
675        // Update aboveOpaqueLayers for next (lower) layer
676        aboveOpaqueLayers.orSelf(opaqueRegion);
677
678        // Store the visible region is screen space
679        layer->setVisibleRegion(visibleRegion);
680        layer->setCoveredRegion(coveredRegion);
681
682        // If a secure layer is partially visible, lock-down the screen!
683        if (layer->isSecure() && !visibleRegion.isEmpty()) {
684            secureFrameBuffer = true;
685        }
686    }
687
688    // invalidate the areas where a layer was removed
689    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
690    mDirtyRegionRemovedLayer.clear();
691
692    mSecureFrameBuffer = secureFrameBuffer;
693    opaqueRegion = aboveOpaqueLayers;
694}
695
696
697void SurfaceFlinger::commitTransaction()
698{
699    mDrawingState = mCurrentState;
700    mResizeTransationPending = false;
701    mTransactionCV.broadcast();
702}
703
704void SurfaceFlinger::handlePageFlip()
705{
706    bool visibleRegions = mVisibleRegionsDirty;
707    LayerVector& currentLayers(
708            const_cast<LayerVector&>(mDrawingState.layersSortedByZ));
709    visibleRegions |= lockPageFlip(currentLayers);
710
711        const DisplayHardware& hw = graphicPlane(0).displayHardware();
712        const Region screenRegion(hw.bounds());
713        if (visibleRegions) {
714            Region opaqueRegion;
715            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
716
717            /*
718             *  rebuild the visible layer list
719             */
720            mVisibleLayersSortedByZ.clear();
721            const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
722            size_t count = currentLayers.size();
723            mVisibleLayersSortedByZ.setCapacity(count);
724            for (size_t i=0 ; i<count ; i++) {
725                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
726                    mVisibleLayersSortedByZ.add(currentLayers[i]);
727            }
728
729            mWormholeRegion = screenRegion.subtract(opaqueRegion);
730            mVisibleRegionsDirty = false;
731            mHwWorkListDirty = true;
732        }
733
734    unlockPageFlip(currentLayers);
735    mDirtyRegion.andSelf(screenRegion);
736}
737
738bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
739{
740    bool recomputeVisibleRegions = false;
741    size_t count = currentLayers.size();
742    sp<LayerBase> const* layers = currentLayers.array();
743    for (size_t i=0 ; i<count ; i++) {
744        const sp<LayerBase>& layer(layers[i]);
745        layer->lockPageFlip(recomputeVisibleRegions);
746    }
747    return recomputeVisibleRegions;
748}
749
750void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
751{
752    const GraphicPlane& plane(graphicPlane(0));
753    const Transform& planeTransform(plane.transform());
754    size_t count = currentLayers.size();
755    sp<LayerBase> const* layers = currentLayers.array();
756    for (size_t i=0 ; i<count ; i++) {
757        const sp<LayerBase>& layer(layers[i]);
758        layer->unlockPageFlip(planeTransform, mDirtyRegion);
759    }
760}
761
762void SurfaceFlinger::handleWorkList()
763{
764    mHwWorkListDirty = false;
765    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
766    if (hwc.initCheck() == NO_ERROR) {
767        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
768        const size_t count = currentLayers.size();
769        hwc.createWorkList(count);
770        hwc_layer_t* const cur(hwc.getLayers());
771        for (size_t i=0 ; cur && i<count ; i++) {
772            currentLayers[i]->setGeometry(&cur[i]);
773            if (mDebugDisableHWC) {
774                cur[i].compositionType = HWC_FRAMEBUFFER;
775                cur[i].flags |= HWC_SKIP_LAYER;
776            }
777        }
778    }
779}
780
781void SurfaceFlinger::handleRepaint()
782{
783    // compute the invalid region
784    mInvalidRegion.orSelf(mDirtyRegion);
785    if (mInvalidRegion.isEmpty()) {
786        // nothing to do
787        return;
788    }
789
790    if (UNLIKELY(mDebugRegion)) {
791        debugFlashRegions();
792    }
793
794    // set the frame buffer
795    const DisplayHardware& hw(graphicPlane(0).displayHardware());
796    glMatrixMode(GL_MODELVIEW);
797    glLoadIdentity();
798
799    uint32_t flags = hw.getFlags();
800    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
801        (flags & DisplayHardware::BUFFER_PRESERVED))
802    {
803        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
804        // takes a rectangle, we must make sure to update that whole
805        // rectangle in that case
806        if (flags & DisplayHardware::SWAP_RECTANGLE) {
807            // TODO: we really should be able to pass a region to
808            // SWAP_RECTANGLE so that we don't have to redraw all this.
809            mDirtyRegion.set(mInvalidRegion.bounds());
810        } else {
811            // in the BUFFER_PRESERVED case, obviously, we can update only
812            // what's needed and nothing more.
813            // NOTE: this is NOT a common case, as preserving the backbuffer
814            // is costly and usually involves copying the whole update back.
815        }
816    } else {
817        if (flags & DisplayHardware::PARTIAL_UPDATES) {
818            // We need to redraw the rectangle that will be updated
819            // (pushed to the framebuffer).
820            // This is needed because PARTIAL_UPDATES only takes one
821            // rectangle instead of a region (see DisplayHardware::flip())
822            mDirtyRegion.set(mInvalidRegion.bounds());
823        } else {
824            // we need to redraw everything (the whole screen)
825            mDirtyRegion.set(hw.bounds());
826            mInvalidRegion = mDirtyRegion;
827        }
828    }
829
830    // compose all surfaces
831    composeSurfaces(mDirtyRegion);
832
833    // clear the dirty regions
834    mDirtyRegion.clear();
835}
836
837void SurfaceFlinger::composeSurfaces(const Region& dirty)
838{
839    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
840        // should never happen unless the window manager has a bug
841        // draw something...
842        drawWormhole();
843    }
844
845    status_t err = NO_ERROR;
846    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
847    size_t count = layers.size();
848
849    const DisplayHardware& hw(graphicPlane(0).displayHardware());
850    HWComposer& hwc(hw.getHwComposer());
851    hwc_layer_t* const cur(hwc.getLayers());
852
853    LOGE_IF(cur && hwc.getNumLayers() != count,
854            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
855            hwc.getNumLayers(), count);
856
857    // just to be extra-safe, use the smallest count
858    if (hwc.initCheck() == NO_ERROR) {
859        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
860    }
861
862    /*
863     *  update the per-frame h/w composer data for each layer
864     *  and build the transparent region of the FB
865     */
866    Region transparent;
867    if (cur) {
868        for (size_t i=0 ; i<count ; i++) {
869            const sp<LayerBase>& layer(layers[i]);
870            layer->setPerFrameData(&cur[i]);
871            if (cur[i].hints & HWC_HINT_CLEAR_FB) {
872                if (!(layer->needsBlending())) {
873                    transparent.orSelf(layer->visibleRegionScreen);
874                }
875            }
876        }
877        err = hwc.prepare();
878        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
879    }
880
881    /*
882     *  clear the area of the FB that need to be transparent
883     */
884    transparent.andSelf(dirty);
885    if (!transparent.isEmpty()) {
886        glClearColor(0,0,0,0);
887        Region::const_iterator it = transparent.begin();
888        Region::const_iterator const end = transparent.end();
889        const int32_t height = hw.getHeight();
890        while (it != end) {
891            const Rect& r(*it++);
892            const GLint sy = height - (r.top + r.height());
893            glScissor(r.left, sy, r.width(), r.height());
894            glClear(GL_COLOR_BUFFER_BIT);
895        }
896    }
897
898
899    /*
900     * and then, render the layers targeted at the framebuffer
901     */
902    for (size_t i=0 ; i<count ; i++) {
903        if (cur) {
904            if ((cur[i].compositionType != HWC_FRAMEBUFFER) &&
905                !(cur[i].flags & HWC_SKIP_LAYER)) {
906                // skip layers handled by the HAL
907                continue;
908            }
909        }
910
911        const sp<LayerBase>& layer(layers[i]);
912        const Region clip(dirty.intersect(layer->visibleRegionScreen));
913        if (!clip.isEmpty()) {
914            layer->draw(clip);
915        }
916    }
917}
918
919void SurfaceFlinger::unlockClients()
920{
921    const LayerVector& drawingLayers(mDrawingState.layersSortedByZ);
922    const size_t count = drawingLayers.size();
923    sp<LayerBase> const* const layers = drawingLayers.array();
924    for (size_t i=0 ; i<count ; ++i) {
925        const sp<LayerBase>& layer = layers[i];
926        layer->finishPageFlip();
927    }
928}
929
930void SurfaceFlinger::debugFlashRegions()
931{
932    const DisplayHardware& hw(graphicPlane(0).displayHardware());
933    const uint32_t flags = hw.getFlags();
934
935    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
936            (flags & DisplayHardware::BUFFER_PRESERVED))) {
937        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
938                mDirtyRegion.bounds() : hw.bounds());
939        composeSurfaces(repaint);
940    }
941
942    TextureManager::deactivateTextures();
943
944    glDisable(GL_BLEND);
945    glDisable(GL_DITHER);
946    glDisable(GL_SCISSOR_TEST);
947
948    static int toggle = 0;
949    toggle = 1 - toggle;
950    if (toggle) {
951        glColor4f(1, 0, 1, 1);
952    } else {
953        glColor4f(1, 1, 0, 1);
954    }
955
956    Region::const_iterator it = mDirtyRegion.begin();
957    Region::const_iterator const end = mDirtyRegion.end();
958    while (it != end) {
959        const Rect& r = *it++;
960        GLfloat vertices[][2] = {
961                { r.left,  r.top },
962                { r.left,  r.bottom },
963                { r.right, r.bottom },
964                { r.right, r.top }
965        };
966        glVertexPointer(2, GL_FLOAT, 0, vertices);
967        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
968    }
969
970    if (mInvalidRegion.isEmpty()) {
971        mDirtyRegion.dump("mDirtyRegion");
972        mInvalidRegion.dump("mInvalidRegion");
973    }
974    hw.flip(mInvalidRegion);
975
976    if (mDebugRegion > 1)
977        usleep(mDebugRegion * 1000);
978
979    glEnable(GL_SCISSOR_TEST);
980    //mDirtyRegion.dump("mDirtyRegion");
981}
982
983void SurfaceFlinger::drawWormhole() const
984{
985    const Region region(mWormholeRegion.intersect(mDirtyRegion));
986    if (region.isEmpty())
987        return;
988
989    const DisplayHardware& hw(graphicPlane(0).displayHardware());
990    const int32_t width = hw.getWidth();
991    const int32_t height = hw.getHeight();
992
993    glDisable(GL_BLEND);
994    glDisable(GL_DITHER);
995
996    if (LIKELY(!mDebugBackground)) {
997        glClearColor(0,0,0,0);
998        Region::const_iterator it = region.begin();
999        Region::const_iterator const end = region.end();
1000        while (it != end) {
1001            const Rect& r = *it++;
1002            const GLint sy = height - (r.top + r.height());
1003            glScissor(r.left, sy, r.width(), r.height());
1004            glClear(GL_COLOR_BUFFER_BIT);
1005        }
1006    } else {
1007        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1008                { width, height }, { 0, height }  };
1009        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1010        glVertexPointer(2, GL_SHORT, 0, vertices);
1011        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1012        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1013#if defined(GL_OES_EGL_image_external)
1014        if (GLExtensions::getInstance().haveTextureExternal()) {
1015            glDisable(GL_TEXTURE_EXTERNAL_OES);
1016        }
1017#endif
1018        glEnable(GL_TEXTURE_2D);
1019        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1020        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1021        glMatrixMode(GL_TEXTURE);
1022        glLoadIdentity();
1023        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1024        Region::const_iterator it = region.begin();
1025        Region::const_iterator const end = region.end();
1026        while (it != end) {
1027            const Rect& r = *it++;
1028            const GLint sy = height - (r.top + r.height());
1029            glScissor(r.left, sy, r.width(), r.height());
1030            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1031        }
1032        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1033    }
1034}
1035
1036void SurfaceFlinger::debugShowFPS() const
1037{
1038    static int mFrameCount;
1039    static int mLastFrameCount = 0;
1040    static nsecs_t mLastFpsTime = 0;
1041    static float mFps = 0;
1042    mFrameCount++;
1043    nsecs_t now = systemTime();
1044    nsecs_t diff = now - mLastFpsTime;
1045    if (diff > ms2ns(250)) {
1046        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1047        mLastFpsTime = now;
1048        mLastFrameCount = mFrameCount;
1049    }
1050    // XXX: mFPS has the value we want
1051 }
1052
1053status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1054{
1055    Mutex::Autolock _l(mStateLock);
1056    addLayer_l(layer);
1057    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1058    return NO_ERROR;
1059}
1060
1061status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1062{
1063    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1064    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1065}
1066
1067ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1068        const sp<LayerBaseClient>& lbc)
1069{
1070    Mutex::Autolock _l(mStateLock);
1071
1072    // attach this layer to the client
1073    ssize_t name = client->attachLayer(lbc);
1074
1075    // add this layer to the current state list
1076    addLayer_l(lbc);
1077
1078    return name;
1079}
1080
1081status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1082{
1083    Mutex::Autolock _l(mStateLock);
1084    status_t err = purgatorizeLayer_l(layer);
1085    if (err == NO_ERROR)
1086        setTransactionFlags(eTransactionNeeded);
1087    return err;
1088}
1089
1090status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1091{
1092    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1093    if (lbc != 0) {
1094        mLayerMap.removeItem( lbc->getSurface()->asBinder() );
1095    }
1096    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1097    if (index >= 0) {
1098        mLayersRemoved = true;
1099        return NO_ERROR;
1100    }
1101    return status_t(index);
1102}
1103
1104status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1105{
1106    // remove the layer from the main list (through a transaction).
1107    ssize_t err = removeLayer_l(layerBase);
1108
1109    layerBase->onRemoved();
1110
1111    // it's possible that we don't find a layer, because it might
1112    // have been destroyed already -- this is not technically an error
1113    // from the user because there is a race between Client::destroySurface(),
1114    // ~Client() and ~ISurface().
1115    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1116}
1117
1118status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1119{
1120    layer->forceVisibilityTransaction();
1121    setTransactionFlags(eTraversalNeeded);
1122    return NO_ERROR;
1123}
1124
1125uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1126{
1127    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1128}
1129
1130uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1131{
1132    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1133    if ((old & flags)==0) { // wake the server up
1134        signalEvent();
1135    }
1136    return old;
1137}
1138
1139void SurfaceFlinger::openGlobalTransaction()
1140{
1141    android_atomic_inc(&mTransactionCount);
1142}
1143
1144void SurfaceFlinger::closeGlobalTransaction()
1145{
1146    if (android_atomic_dec(&mTransactionCount) == 1) {
1147        signalEvent();
1148
1149        // if there is a transaction with a resize, wait for it to
1150        // take effect before returning.
1151        Mutex::Autolock _l(mStateLock);
1152        while (mResizeTransationPending) {
1153            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1154            if (CC_UNLIKELY(err != NO_ERROR)) {
1155                // just in case something goes wrong in SF, return to the
1156                // called after a few seconds.
1157                LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1158                mResizeTransationPending = false;
1159                break;
1160            }
1161        }
1162    }
1163}
1164
1165status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1166{
1167    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1168        return BAD_VALUE;
1169
1170    Mutex::Autolock _l(mStateLock);
1171    mCurrentState.freezeDisplay = 1;
1172    setTransactionFlags(eTransactionNeeded);
1173
1174    // flags is intended to communicate some sort of animation behavior
1175    // (for instance fading)
1176    return NO_ERROR;
1177}
1178
1179status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1180{
1181    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1182        return BAD_VALUE;
1183
1184    Mutex::Autolock _l(mStateLock);
1185    mCurrentState.freezeDisplay = 0;
1186    setTransactionFlags(eTransactionNeeded);
1187
1188    // flags is intended to communicate some sort of animation behavior
1189    // (for instance fading)
1190    return NO_ERROR;
1191}
1192
1193int SurfaceFlinger::setOrientation(DisplayID dpy,
1194        int orientation, uint32_t flags)
1195{
1196    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1197        return BAD_VALUE;
1198
1199    Mutex::Autolock _l(mStateLock);
1200    if (mCurrentState.orientation != orientation) {
1201        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1202            mCurrentState.orientationType = flags;
1203            mCurrentState.orientation = orientation;
1204            setTransactionFlags(eTransactionNeeded);
1205            mTransactionCV.wait(mStateLock);
1206        } else {
1207            orientation = BAD_VALUE;
1208        }
1209    }
1210    return orientation;
1211}
1212
1213sp<ISurface> SurfaceFlinger::createSurface(const sp<Client>& client, int pid,
1214        const String8& name, ISurfaceComposerClient::surface_data_t* params,
1215        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1216        uint32_t flags)
1217{
1218    sp<LayerBaseClient> layer;
1219    sp<LayerBaseClient::Surface> surfaceHandle;
1220
1221    if (int32_t(w|h) < 0) {
1222        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1223                int(w), int(h));
1224        return surfaceHandle;
1225    }
1226
1227    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1228    sp<Layer> normalLayer;
1229    switch (flags & eFXSurfaceMask) {
1230        case eFXSurfaceNormal:
1231#if HAS_PUSH_BUFFERS
1232            if (UNLIKELY(flags & ePushBuffers)) {
1233                layer = createPushBuffersSurface(client, d, w, h, flags);
1234            } else
1235#endif
1236            {
1237                normalLayer = createNormalSurface(client, d, w, h, flags, format);
1238                layer = normalLayer;
1239            }
1240            break;
1241        case eFXSurfaceBlur:
1242            layer = createBlurSurface(client, d, w, h, flags);
1243            break;
1244        case eFXSurfaceDim:
1245            layer = createDimSurface(client, d, w, h, flags);
1246            break;
1247    }
1248
1249    if (layer != 0) {
1250        layer->initStates(w, h, flags);
1251        layer->setName(name);
1252        ssize_t token = addClientLayer(client, layer);
1253
1254        surfaceHandle = layer->getSurface();
1255        if (surfaceHandle != 0) {
1256            params->token = token;
1257            params->identity = surfaceHandle->getIdentity();
1258            params->width = w;
1259            params->height = h;
1260            params->format = format;
1261            if (normalLayer != 0) {
1262                Mutex::Autolock _l(mStateLock);
1263                mLayerMap.add(surfaceHandle->asBinder(), normalLayer);
1264            }
1265        }
1266
1267        setTransactionFlags(eTransactionNeeded);
1268    }
1269
1270    return surfaceHandle;
1271}
1272
1273sp<Layer> SurfaceFlinger::createNormalSurface(
1274        const sp<Client>& client, DisplayID display,
1275        uint32_t w, uint32_t h, uint32_t flags,
1276        PixelFormat& format)
1277{
1278    // initialize the surfaces
1279    switch (format) { // TODO: take h/w into account
1280    case PIXEL_FORMAT_TRANSPARENT:
1281    case PIXEL_FORMAT_TRANSLUCENT:
1282        format = PIXEL_FORMAT_RGBA_8888;
1283        break;
1284    case PIXEL_FORMAT_OPAQUE:
1285#ifdef NO_RGBX_8888
1286        format = PIXEL_FORMAT_RGB_565;
1287#else
1288        format = PIXEL_FORMAT_RGBX_8888;
1289#endif
1290        break;
1291    }
1292
1293#ifdef NO_RGBX_8888
1294    if (format == PIXEL_FORMAT_RGBX_8888)
1295        format = PIXEL_FORMAT_RGBA_8888;
1296#endif
1297
1298    sp<Layer> layer = new Layer(this, display, client);
1299    status_t err = layer->setBuffers(w, h, format, flags);
1300    if (LIKELY(err != NO_ERROR)) {
1301        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1302        layer.clear();
1303    }
1304    return layer;
1305}
1306
1307sp<LayerBlur> SurfaceFlinger::createBlurSurface(
1308        const sp<Client>& client, DisplayID display,
1309        uint32_t w, uint32_t h, uint32_t flags)
1310{
1311    sp<LayerBlur> layer = new LayerBlur(this, display, client);
1312    layer->initStates(w, h, flags);
1313    return layer;
1314}
1315
1316sp<LayerDim> SurfaceFlinger::createDimSurface(
1317        const sp<Client>& client, DisplayID display,
1318        uint32_t w, uint32_t h, uint32_t flags)
1319{
1320    sp<LayerDim> layer = new LayerDim(this, display, client);
1321    layer->initStates(w, h, flags);
1322    return layer;
1323}
1324
1325sp<LayerBuffer> SurfaceFlinger::createPushBuffersSurface(
1326        const sp<Client>& client, DisplayID display,
1327        uint32_t w, uint32_t h, uint32_t flags)
1328{
1329    sp<LayerBuffer> layer = new LayerBuffer(this, display, client);
1330    layer->initStates(w, h, flags);
1331    return layer;
1332}
1333
1334status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1335{
1336    /*
1337     * called by the window manager, when a surface should be marked for
1338     * destruction.
1339     *
1340     * The surface is removed from the current and drawing lists, but placed
1341     * in the purgatory queue, so it's not destroyed right-away (we need
1342     * to wait for all client's references to go away first).
1343     */
1344
1345    status_t err = NAME_NOT_FOUND;
1346    Mutex::Autolock _l(mStateLock);
1347    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1348    if (layer != 0) {
1349        err = purgatorizeLayer_l(layer);
1350        if (err == NO_ERROR) {
1351            setTransactionFlags(eTransactionNeeded);
1352        }
1353    }
1354    return err;
1355}
1356
1357status_t SurfaceFlinger::destroySurface(const sp<LayerBaseClient>& layer)
1358{
1359    // called by ~ISurface() when all references are gone
1360
1361    class MessageDestroySurface : public MessageBase {
1362        SurfaceFlinger* flinger;
1363        sp<LayerBaseClient> layer;
1364    public:
1365        MessageDestroySurface(
1366                SurfaceFlinger* flinger, const sp<LayerBaseClient>& layer)
1367            : flinger(flinger), layer(layer) { }
1368        virtual bool handler() {
1369            sp<LayerBaseClient> l(layer);
1370            layer.clear(); // clear it outside of the lock;
1371            Mutex::Autolock _l(flinger->mStateLock);
1372            /*
1373             * remove the layer from the current list -- chances are that it's
1374             * not in the list anyway, because it should have been removed
1375             * already upon request of the client (eg: window manager).
1376             * However, a buggy client could have not done that.
1377             * Since we know we don't have any more clients, we don't need
1378             * to use the purgatory.
1379             */
1380            status_t err = flinger->removeLayer_l(l);
1381            LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1382                    "error removing layer=%p (%s)", l.get(), strerror(-err));
1383            return true;
1384        }
1385    };
1386
1387    postMessageAsync( new MessageDestroySurface(this, layer) );
1388    return NO_ERROR;
1389}
1390
1391status_t SurfaceFlinger::setClientState(
1392        const sp<Client>& client,
1393        int32_t count,
1394        const layer_state_t* states)
1395{
1396    Mutex::Autolock _l(mStateLock);
1397    uint32_t flags = 0;
1398    for (int i=0 ; i<count ; i++) {
1399        const layer_state_t& s(states[i]);
1400        sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1401        if (layer != 0) {
1402            const uint32_t what = s.what;
1403            if (what & ePositionChanged) {
1404                if (layer->setPosition(s.x, s.y))
1405                    flags |= eTraversalNeeded;
1406            }
1407            if (what & eLayerChanged) {
1408                ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1409                if (layer->setLayer(s.z)) {
1410                    mCurrentState.layersSortedByZ.removeAt(idx);
1411                    mCurrentState.layersSortedByZ.add(layer);
1412                    // we need traversal (state changed)
1413                    // AND transaction (list changed)
1414                    flags |= eTransactionNeeded|eTraversalNeeded;
1415                }
1416            }
1417            if (what & eSizeChanged) {
1418                if (layer->setSize(s.w, s.h)) {
1419                    flags |= eTraversalNeeded;
1420                    mResizeTransationPending = true;
1421                }
1422            }
1423            if (what & eAlphaChanged) {
1424                if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1425                    flags |= eTraversalNeeded;
1426            }
1427            if (what & eMatrixChanged) {
1428                if (layer->setMatrix(s.matrix))
1429                    flags |= eTraversalNeeded;
1430            }
1431            if (what & eTransparentRegionChanged) {
1432                if (layer->setTransparentRegionHint(s.transparentRegion))
1433                    flags |= eTraversalNeeded;
1434            }
1435            if (what & eVisibilityChanged) {
1436                if (layer->setFlags(s.flags, s.mask))
1437                    flags |= eTraversalNeeded;
1438            }
1439        }
1440    }
1441    if (flags) {
1442        setTransactionFlags(flags);
1443    }
1444    return NO_ERROR;
1445}
1446
1447void SurfaceFlinger::screenReleased(int dpy)
1448{
1449    // this may be called by a signal handler, we can't do too much in here
1450    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1451    signalEvent();
1452}
1453
1454void SurfaceFlinger::screenAcquired(int dpy)
1455{
1456    // this may be called by a signal handler, we can't do too much in here
1457    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1458    signalEvent();
1459}
1460
1461status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1462{
1463    const size_t SIZE = 1024;
1464    char buffer[SIZE];
1465    String8 result;
1466    if (!mDump.checkCalling()) {
1467        snprintf(buffer, SIZE, "Permission Denial: "
1468                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1469                IPCThreadState::self()->getCallingPid(),
1470                IPCThreadState::self()->getCallingUid());
1471        result.append(buffer);
1472    } else {
1473
1474        // figure out if we're stuck somewhere
1475        const nsecs_t now = systemTime();
1476        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1477        const nsecs_t inTransaction(mDebugInTransaction);
1478        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1479        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1480
1481        // Try to get the main lock, but don't insist if we can't
1482        // (this would indicate SF is stuck, but we want to be able to
1483        // print something in dumpsys).
1484        int retry = 3;
1485        while (mStateLock.tryLock()<0 && --retry>=0) {
1486            usleep(1000000);
1487        }
1488        const bool locked(retry >= 0);
1489        if (!locked) {
1490            snprintf(buffer, SIZE,
1491                    "SurfaceFlinger appears to be unresponsive, "
1492                    "dumping anyways (no locks held)\n");
1493            result.append(buffer);
1494        }
1495
1496        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1497        const size_t count = currentLayers.size();
1498        for (size_t i=0 ; i<count ; i++) {
1499            const sp<LayerBase>& layer(currentLayers[i]);
1500            layer->dump(result, buffer, SIZE);
1501            const Layer::State& s(layer->drawingState());
1502            s.transparentRegion.dump(result, "transparentRegion");
1503            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1504            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1505        }
1506
1507        mWormholeRegion.dump(result, "WormholeRegion");
1508        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1509        snprintf(buffer, SIZE,
1510                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1511                mFreezeDisplay?"yes":"no", mFreezeCount,
1512                mCurrentState.orientation, hw.canDraw());
1513        result.append(buffer);
1514        snprintf(buffer, SIZE,
1515                "  last eglSwapBuffers() time: %f us\n"
1516                "  last transaction time     : %f us\n",
1517                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1518        result.append(buffer);
1519
1520        if (inSwapBuffersDuration || !locked) {
1521            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1522                    inSwapBuffersDuration/1000.0);
1523            result.append(buffer);
1524        }
1525
1526        if (inTransactionDuration || !locked) {
1527            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1528                    inTransactionDuration/1000.0);
1529            result.append(buffer);
1530        }
1531
1532        HWComposer& hwc(hw.getHwComposer());
1533        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1534                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1535                mDebugDisableHWC ? "disabled" : "enabled");
1536        result.append(buffer);
1537        hwc.dump(result, buffer, SIZE);
1538
1539        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1540        alloc.dump(result);
1541
1542        if (locked) {
1543            mStateLock.unlock();
1544        }
1545    }
1546    write(fd, result.string(), result.size());
1547    return NO_ERROR;
1548}
1549
1550status_t SurfaceFlinger::onTransact(
1551    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1552{
1553    switch (code) {
1554        case CREATE_CONNECTION:
1555        case OPEN_GLOBAL_TRANSACTION:
1556        case CLOSE_GLOBAL_TRANSACTION:
1557        case SET_ORIENTATION:
1558        case FREEZE_DISPLAY:
1559        case UNFREEZE_DISPLAY:
1560        case BOOT_FINISHED:
1561        {
1562            // codes that require permission check
1563            IPCThreadState* ipc = IPCThreadState::self();
1564            const int pid = ipc->getCallingPid();
1565            const int uid = ipc->getCallingUid();
1566            if ((uid != AID_GRAPHICS) && !mAccessSurfaceFlinger.check(pid, uid)) {
1567                LOGE("Permission Denial: "
1568                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1569                return PERMISSION_DENIED;
1570            }
1571            break;
1572        }
1573        case CAPTURE_SCREEN:
1574        {
1575            // codes that require permission check
1576            IPCThreadState* ipc = IPCThreadState::self();
1577            const int pid = ipc->getCallingPid();
1578            const int uid = ipc->getCallingUid();
1579            if ((uid != AID_GRAPHICS) && !mReadFramebuffer.check(pid, uid)) {
1580                LOGE("Permission Denial: "
1581                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1582                return PERMISSION_DENIED;
1583            }
1584            break;
1585        }
1586    }
1587
1588    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1589    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1590        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1591        if (UNLIKELY(!mHardwareTest.checkCalling())) {
1592            IPCThreadState* ipc = IPCThreadState::self();
1593            const int pid = ipc->getCallingPid();
1594            const int uid = ipc->getCallingUid();
1595            LOGE("Permission Denial: "
1596                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1597            return PERMISSION_DENIED;
1598        }
1599        int n;
1600        switch (code) {
1601            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1602            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1603                return NO_ERROR;
1604            case 1002:  // SHOW_UPDATES
1605                n = data.readInt32();
1606                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1607                return NO_ERROR;
1608            case 1003:  // SHOW_BACKGROUND
1609                n = data.readInt32();
1610                mDebugBackground = n ? 1 : 0;
1611                return NO_ERROR;
1612            case 1008:  // toggle use of hw composer
1613                n = data.readInt32();
1614                mDebugDisableHWC = n ? 1 : 0;
1615                mHwWorkListDirty = true;
1616                // fall-through...
1617            case 1004:{ // repaint everything
1618                Mutex::Autolock _l(mStateLock);
1619                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1620                mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1621                signalEvent();
1622                return NO_ERROR;
1623            }
1624            case 1005:{ // force transaction
1625                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1626                return NO_ERROR;
1627            }
1628            case 1006:{ // enable/disable GraphicLog
1629                int enabled = data.readInt32();
1630                GraphicLog::getInstance().setEnabled(enabled);
1631                return NO_ERROR;
1632            }
1633            case 1007: // set mFreezeCount
1634                mFreezeCount = data.readInt32();
1635                mFreezeDisplayTime = 0;
1636                return NO_ERROR;
1637            case 1010:  // interrogate.
1638                reply->writeInt32(0);
1639                reply->writeInt32(0);
1640                reply->writeInt32(mDebugRegion);
1641                reply->writeInt32(mDebugBackground);
1642                return NO_ERROR;
1643            case 1013: {
1644                Mutex::Autolock _l(mStateLock);
1645                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1646                reply->writeInt32(hw.getPageFlipCount());
1647            }
1648            return NO_ERROR;
1649        }
1650    }
1651    return err;
1652}
1653
1654// ---------------------------------------------------------------------------
1655
1656status_t SurfaceFlinger::captureScreen(DisplayID dpy,
1657        sp<IMemoryHeap>* heap,
1658        uint32_t* width, uint32_t* height, PixelFormat* format)
1659{
1660    // only one display supported for now
1661    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1662        return BAD_VALUE;
1663
1664    if (!GLExtensions::getInstance().haveFramebufferObject())
1665        return INVALID_OPERATION;
1666
1667    class MessageCaptureScreen : public MessageBase {
1668        SurfaceFlinger* flinger;
1669        DisplayID dpy;
1670        sp<IMemoryHeap>* heap;
1671        uint32_t* w;
1672        uint32_t* h;
1673        PixelFormat* f;
1674        status_t result;
1675    public:
1676        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
1677                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f)
1678            : flinger(flinger), dpy(dpy),
1679              heap(heap), w(w), h(h), f(f), result(PERMISSION_DENIED)
1680        {
1681        }
1682        status_t getResult() const {
1683            return result;
1684        }
1685        virtual bool handler() {
1686            Mutex::Autolock _l(flinger->mStateLock);
1687
1688            // if we have secure windows, never allow the screen capture
1689            if (flinger->mSecureFrameBuffer)
1690                return true;
1691
1692            // make sure to clear all GL error flags
1693            while ( glGetError() != GL_NO_ERROR ) ;
1694
1695            // get screen geometry
1696            const DisplayHardware& hw(flinger->graphicPlane(dpy).displayHardware());
1697            const uint32_t sw = hw.getWidth();
1698            const uint32_t sh = hw.getHeight();
1699            const Region screenBounds(hw.bounds());
1700            const size_t size = sw * sh * 4;
1701
1702            // create a FBO
1703            GLuint name, tname;
1704            glGenRenderbuffersOES(1, &tname);
1705            glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
1706            glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
1707            glGenFramebuffersOES(1, &name);
1708            glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1709            glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
1710                    GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
1711
1712            GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
1713            if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
1714
1715                // invert everything, b/c glReadPixel() below will invert the FB
1716                glMatrixMode(GL_PROJECTION);
1717                glPushMatrix();
1718                glLoadIdentity();
1719                glOrthof(0, sw, 0, sh, 0, 1);
1720                glMatrixMode(GL_MODELVIEW);
1721
1722                // redraw the screen entirely...
1723                glClearColor(0,0,0,1);
1724                glClear(GL_COLOR_BUFFER_BIT);
1725                const Vector< sp<LayerBase> >& layers(
1726                        flinger->mVisibleLayersSortedByZ);
1727                const size_t count = layers.size();
1728                for (size_t i=0 ; i<count ; ++i) {
1729                    const sp<LayerBase>& layer(layers[i]);
1730                    if (!strcmp(layer->getTypeId(), "LayerBuffer")) {
1731                        // we cannot render LayerBuffer because it doens't
1732                        // use OpenGL, and won't show-up in the FBO.
1733                        continue;
1734                    }
1735                    layer->draw(screenBounds);
1736                }
1737
1738                glMatrixMode(GL_PROJECTION);
1739                glPopMatrix();
1740                glMatrixMode(GL_MODELVIEW);
1741
1742                // check for errors and return screen capture
1743                if (glGetError() != GL_NO_ERROR) {
1744                    // error while rendering
1745                    result = INVALID_OPERATION;
1746                } else {
1747                    // allocate shared memory large enough to hold the
1748                    // screen capture
1749                    sp<MemoryHeapBase> base(
1750                            new MemoryHeapBase(size, 0, "screen-capture") );
1751                    void* const ptr = base->getBase();
1752                    if (ptr) {
1753                        // capture the screen with glReadPixels()
1754                        glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
1755                        if (glGetError() == GL_NO_ERROR) {
1756                            *heap = base;
1757                            *w = sw;
1758                            *h = sh;
1759                            *f = PIXEL_FORMAT_RGBA_8888;
1760                            result = NO_ERROR;
1761                        }
1762                    } else {
1763                        result = NO_MEMORY;
1764                    }
1765                }
1766            } else {
1767                result = BAD_VALUE;
1768            }
1769
1770            // release FBO resources
1771            glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1772            glDeleteRenderbuffersOES(1, &tname);
1773            glDeleteFramebuffersOES(1, &name);
1774            return true;
1775        }
1776    };
1777
1778    sp<MessageBase> msg = new MessageCaptureScreen(this,
1779            dpy, heap, width, height, format);
1780    status_t res = postMessageSync(msg);
1781    if (res == NO_ERROR) {
1782        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
1783    }
1784    return res;
1785}
1786
1787// ---------------------------------------------------------------------------
1788
1789sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
1790{
1791    sp<Layer> result;
1792    Mutex::Autolock _l(mStateLock);
1793    result = mLayerMap.valueFor( sur->asBinder() ).promote();
1794    return result;
1795}
1796
1797// ---------------------------------------------------------------------------
1798
1799Client::Client(const sp<SurfaceFlinger>& flinger)
1800    : mFlinger(flinger), mNameGenerator(1)
1801{
1802}
1803
1804Client::~Client()
1805{
1806    const size_t count = mLayers.size();
1807    for (size_t i=0 ; i<count ; i++) {
1808        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
1809        if (layer != 0) {
1810            mFlinger->removeLayer(layer);
1811        }
1812    }
1813}
1814
1815status_t Client::initCheck() const {
1816    return NO_ERROR;
1817}
1818
1819ssize_t Client::attachLayer(const sp<LayerBaseClient>& layer)
1820{
1821    int32_t name = android_atomic_inc(&mNameGenerator);
1822    mLayers.add(name, layer);
1823    return name;
1824}
1825
1826void Client::detachLayer(const LayerBaseClient* layer)
1827{
1828    // we do a linear search here, because this doesn't happen often
1829    const size_t count = mLayers.size();
1830    for (size_t i=0 ; i<count ; i++) {
1831        if (mLayers.valueAt(i) == layer) {
1832            mLayers.removeItemsAt(i, 1);
1833            break;
1834        }
1835    }
1836}
1837sp<LayerBaseClient> Client::getLayerUser(int32_t i) const {
1838    sp<LayerBaseClient> lbc;
1839    const wp<LayerBaseClient>& layer(mLayers.valueFor(i));
1840    if (layer != 0) {
1841        lbc = layer.promote();
1842        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
1843    }
1844    return lbc;
1845}
1846
1847sp<IMemoryHeap> Client::getControlBlock() const {
1848    return 0;
1849}
1850ssize_t Client::getTokenForSurface(const sp<ISurface>& sur) const {
1851    return -1;
1852}
1853sp<ISurface> Client::createSurface(
1854        ISurfaceComposerClient::surface_data_t* params, int pid,
1855        const String8& name,
1856        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
1857        uint32_t flags)
1858{
1859    return mFlinger->createSurface(this, pid, name, params,
1860            display, w, h, format, flags);
1861}
1862status_t Client::destroySurface(SurfaceID sid) {
1863    return mFlinger->removeSurface(this, sid);
1864}
1865status_t Client::setState(int32_t count, const layer_state_t* states) {
1866    return mFlinger->setClientState(this, count, states);
1867}
1868
1869// ---------------------------------------------------------------------------
1870
1871UserClient::UserClient(const sp<SurfaceFlinger>& flinger)
1872    : ctrlblk(0), mBitmap(0), mFlinger(flinger)
1873{
1874    const int pgsize = getpagesize();
1875    const int cblksize = ((sizeof(SharedClient)+(pgsize-1))&~(pgsize-1));
1876
1877    mCblkHeap = new MemoryHeapBase(cblksize, 0,
1878            "SurfaceFlinger Client control-block");
1879
1880    ctrlblk = static_cast<SharedClient *>(mCblkHeap->getBase());
1881    if (ctrlblk) { // construct the shared structure in-place.
1882        new(ctrlblk) SharedClient;
1883    }
1884}
1885
1886UserClient::~UserClient()
1887{
1888    if (ctrlblk) {
1889        ctrlblk->~SharedClient();  // destroy our shared-structure.
1890    }
1891
1892    /*
1893     * When a UserClient dies, it's unclear what to do exactly.
1894     * We could go ahead and destroy all surfaces linked to that client
1895     * however, it wouldn't be fair to the main Client
1896     * (usually the the window-manager), which might want to re-target
1897     * the layer to another UserClient.
1898     * I think the best is to do nothing, or not much; in most cases the
1899     * WM itself will go ahead and clean things up when it detects a client of
1900     * his has died.
1901     * The remaining question is what to display? currently we keep
1902     * just keep the current buffer.
1903     */
1904}
1905
1906status_t UserClient::initCheck() const {
1907    return ctrlblk == 0 ? NO_INIT : NO_ERROR;
1908}
1909
1910void UserClient::detachLayer(const Layer* layer)
1911{
1912    int32_t name = layer->getToken();
1913    if (name >= 0) {
1914        int32_t mask = 1LU<<name;
1915        if ((android_atomic_and(~mask, &mBitmap) & mask) == 0) {
1916            LOGW("token %d wasn't marked as used %08x", name, int(mBitmap));
1917        }
1918    }
1919}
1920
1921sp<IMemoryHeap> UserClient::getControlBlock() const {
1922    return mCblkHeap;
1923}
1924
1925ssize_t UserClient::getTokenForSurface(const sp<ISurface>& sur) const
1926{
1927    int32_t name = NAME_NOT_FOUND;
1928    sp<Layer> layer(mFlinger->getLayer(sur));
1929    if (layer == 0) {
1930        return name;
1931    }
1932
1933    // if this layer already has a token, just return it
1934    name = layer->getToken();
1935    if ((name >= 0) && (layer->getClient() == this)) {
1936        return name;
1937    }
1938
1939    name = 0;
1940    do {
1941        int32_t mask = 1LU<<name;
1942        if ((android_atomic_or(mask, &mBitmap) & mask) == 0) {
1943            // we found and locked that name
1944            status_t err = layer->setToken(
1945                    const_cast<UserClient*>(this), ctrlblk, name);
1946            if (err != NO_ERROR) {
1947                // free the name
1948                android_atomic_and(~mask, &mBitmap);
1949                name = err;
1950            }
1951            break;
1952        }
1953        if (++name > 31)
1954            name = NO_MEMORY;
1955    } while(name >= 0);
1956
1957    //LOGD("getTokenForSurface(%p) => %d (client=%p, bitmap=%08lx)",
1958    //        sur->asBinder().get(), name, this, mBitmap);
1959    return name;
1960}
1961
1962sp<ISurface> UserClient::createSurface(
1963        ISurfaceComposerClient::surface_data_t* params, int pid,
1964        const String8& name,
1965        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
1966        uint32_t flags) {
1967    return 0;
1968}
1969status_t UserClient::destroySurface(SurfaceID sid) {
1970    return INVALID_OPERATION;
1971}
1972status_t UserClient::setState(int32_t count, const layer_state_t* states) {
1973    return INVALID_OPERATION;
1974}
1975
1976// ---------------------------------------------------------------------------
1977
1978GraphicPlane::GraphicPlane()
1979    : mHw(0)
1980{
1981}
1982
1983GraphicPlane::~GraphicPlane() {
1984    delete mHw;
1985}
1986
1987bool GraphicPlane::initialized() const {
1988    return mHw ? true : false;
1989}
1990
1991int GraphicPlane::getWidth() const {
1992    return mWidth;
1993}
1994
1995int GraphicPlane::getHeight() const {
1996    return mHeight;
1997}
1998
1999void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2000{
2001    mHw = hw;
2002
2003    // initialize the display orientation transform.
2004    // it's a constant that should come from the display driver.
2005    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2006    char property[PROPERTY_VALUE_MAX];
2007    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2008        //displayOrientation
2009        switch (atoi(property)) {
2010        case 90:
2011            displayOrientation = ISurfaceComposer::eOrientation90;
2012            break;
2013        case 270:
2014            displayOrientation = ISurfaceComposer::eOrientation270;
2015            break;
2016        }
2017    }
2018
2019    const float w = hw->getWidth();
2020    const float h = hw->getHeight();
2021    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2022            &mDisplayTransform);
2023    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2024        mDisplayWidth = h;
2025        mDisplayHeight = w;
2026    } else {
2027        mDisplayWidth = w;
2028        mDisplayHeight = h;
2029    }
2030
2031    setOrientation(ISurfaceComposer::eOrientationDefault);
2032}
2033
2034status_t GraphicPlane::orientationToTransfrom(
2035        int orientation, int w, int h, Transform* tr)
2036{
2037    uint32_t flags = 0;
2038    switch (orientation) {
2039    case ISurfaceComposer::eOrientationDefault:
2040        flags = Transform::ROT_0;
2041        break;
2042    case ISurfaceComposer::eOrientation90:
2043        flags = Transform::ROT_90;
2044        break;
2045    case ISurfaceComposer::eOrientation180:
2046        flags = Transform::ROT_180;
2047        break;
2048    case ISurfaceComposer::eOrientation270:
2049        flags = Transform::ROT_270;
2050        break;
2051    default:
2052        return BAD_VALUE;
2053    }
2054    tr->set(flags, w, h);
2055    return NO_ERROR;
2056}
2057
2058status_t GraphicPlane::setOrientation(int orientation)
2059{
2060    // If the rotation can be handled in hardware, this is where
2061    // the magic should happen.
2062
2063    const DisplayHardware& hw(displayHardware());
2064    const float w = mDisplayWidth;
2065    const float h = mDisplayHeight;
2066    mWidth = int(w);
2067    mHeight = int(h);
2068
2069    Transform orientationTransform;
2070    GraphicPlane::orientationToTransfrom(orientation, w, h,
2071            &orientationTransform);
2072    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2073        mWidth = int(h);
2074        mHeight = int(w);
2075    }
2076
2077    mOrientation = orientation;
2078    mGlobalTransform = mDisplayTransform * orientationTransform;
2079    return NO_ERROR;
2080}
2081
2082const DisplayHardware& GraphicPlane::displayHardware() const {
2083    return *mHw;
2084}
2085
2086const Transform& GraphicPlane::transform() const {
2087    return mGlobalTransform;
2088}
2089
2090EGLDisplay GraphicPlane::getEGLDisplay() const {
2091    return mHw->getEGLDisplay();
2092}
2093
2094// ---------------------------------------------------------------------------
2095
2096}; // namespace android
2097