SurfaceFlinger.cpp revision 6e220a6ce6971555b883f4852c6e5d4c7a617815 
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#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19#include <stdint.h>
20#include <sys/types.h>
21#include <errno.h>
22#include <math.h>
23#include <dlfcn.h>
24
25#include <EGL/egl.h>
26#include <GLES/gl.h>
27
28#include <cutils/log.h>
29#include <cutils/properties.h>
30
31#include <binder/IPCThreadState.h>
32#include <binder/IServiceManager.h>
33#include <binder/MemoryHeapBase.h>
34#include <binder/PermissionCache.h>
35
36#include <ui/DisplayInfo.h>
37
38#include <gui/BitTube.h>
39#include <gui/BufferQueue.h>
40#include <gui/IDisplayEventConnection.h>
41#include <gui/SurfaceTextureClient.h>
42
43#include <ui/GraphicBufferAllocator.h>
44#include <ui/PixelFormat.h>
45
46#include <utils/String8.h>
47#include <utils/String16.h>
48#include <utils/StopWatch.h>
49#include <utils/Trace.h>
50
51#include <private/android_filesystem_config.h>
52
53#include "clz.h"
54#include "DdmConnection.h"
55#include "DisplayDevice.h"
56#include "Client.h"
57#include "EventThread.h"
58#include "GLExtensions.h"
59#include "Layer.h"
60#include "LayerDim.h"
61#include "LayerScreenshot.h"
62#include "SurfaceFlinger.h"
63
64#include "DisplayHardware/FramebufferSurface.h"
65#include "DisplayHardware/HWComposer.h"
66
67
68#define EGL_VERSION_HW_ANDROID  0x3143
69
70#define DISPLAY_COUNT       1
71
72namespace android {
73// ---------------------------------------------------------------------------
74
75const String16 sHardwareTest("android.permission.HARDWARE_TEST");
76const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
77const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
78const String16 sDump("android.permission.DUMP");
79
80// ---------------------------------------------------------------------------
81
82SurfaceFlinger::SurfaceFlinger()
83    :   BnSurfaceComposer(), Thread(false),
84        mTransactionFlags(0),
85        mTransationPending(false),
86        mLayersRemoved(false),
87        mRepaintEverything(0),
88        mBootTime(systemTime()),
89        mVisibleRegionsDirty(false),
90        mHwWorkListDirty(false),
91        mDebugRegion(0),
92        mDebugDDMS(0),
93        mDebugDisableHWC(0),
94        mDebugDisableTransformHint(0),
95        mDebugInSwapBuffers(0),
96        mLastSwapBufferTime(0),
97        mDebugInTransaction(0),
98        mLastTransactionTime(0),
99        mBootFinished(false)
100{
101    ALOGI("SurfaceFlinger is starting");
102
103    // debugging stuff...
104    char value[PROPERTY_VALUE_MAX];
105
106    property_get("debug.sf.showupdates", value, "0");
107    mDebugRegion = atoi(value);
108
109    property_get("debug.sf.ddms", value, "0");
110    mDebugDDMS = atoi(value);
111    if (mDebugDDMS) {
112        if (!startDdmConnection()) {
113            // start failed, and DDMS debugging not enabled
114            mDebugDDMS = 0;
115        }
116    }
117    ALOGI_IF(mDebugRegion, "showupdates enabled");
118    ALOGI_IF(mDebugDDMS, "DDMS debugging enabled");
119}
120
121void SurfaceFlinger::onFirstRef()
122{
123    mEventQueue.init(this);
124
125    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
126
127    // Wait for the main thread to be done with its initialization
128    mReadyToRunBarrier.wait();
129}
130
131
132SurfaceFlinger::~SurfaceFlinger()
133{
134    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
135    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
136    eglTerminate(display);
137}
138
139void SurfaceFlinger::binderDied(const wp<IBinder>& who)
140{
141    // the window manager died on us. prepare its eulogy.
142
143    // restore initial conditions (default device unblank, etc)
144    initializeDisplays();
145
146    // restart the boot-animation
147    startBootAnim();
148}
149
150sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
151{
152    sp<ISurfaceComposerClient> bclient;
153    sp<Client> client(new Client(this));
154    status_t err = client->initCheck();
155    if (err == NO_ERROR) {
156        bclient = client;
157    }
158    return bclient;
159}
160
161sp<IBinder> SurfaceFlinger::createDisplay()
162{
163    class DisplayToken : public BBinder {
164        sp<SurfaceFlinger> flinger;
165        virtual ~DisplayToken() {
166             // no more references, this display must be terminated
167             Mutex::Autolock _l(flinger->mStateLock);
168             flinger->mCurrentState.displays.removeItem(this);
169             flinger->setTransactionFlags(eDisplayTransactionNeeded);
170         }
171     public:
172        DisplayToken(const sp<SurfaceFlinger>& flinger)
173            : flinger(flinger) {
174        }
175    };
176
177    sp<BBinder> token = new DisplayToken(this);
178
179    Mutex::Autolock _l(mStateLock);
180    DisplayDeviceState info(DisplayDevice::DISPLAY_VIRTUAL);
181    mCurrentState.displays.add(token, info);
182
183    return token;
184}
185
186sp<IBinder> SurfaceFlinger::getBuiltInDisplay(int32_t id) {
187    if (uint32_t(id) >= DisplayDevice::NUM_DISPLAY_TYPES) {
188        ALOGE("getDefaultDisplay: id=%d is not a valid default display id", id);
189        return NULL;
190    }
191    return mDefaultDisplays[id];
192}
193
194sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
195{
196    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
197    return gba;
198}
199
200void SurfaceFlinger::bootFinished()
201{
202    const nsecs_t now = systemTime();
203    const nsecs_t duration = now - mBootTime;
204    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
205    mBootFinished = true;
206
207    // wait patiently for the window manager death
208    const String16 name("window");
209    sp<IBinder> window(defaultServiceManager()->getService(name));
210    if (window != 0) {
211        window->linkToDeath(static_cast<IBinder::DeathRecipient*>(this));
212    }
213
214    // stop boot animation
215    // formerly we would just kill the process, but we now ask it to exit so it
216    // can choose where to stop the animation.
217    property_set("service.bootanim.exit", "1");
218}
219
220void SurfaceFlinger::deleteTextureAsync(GLuint texture) {
221    class MessageDestroyGLTexture : public MessageBase {
222        GLuint texture;
223    public:
224        MessageDestroyGLTexture(GLuint texture)
225            : texture(texture) {
226        }
227        virtual bool handler() {
228            glDeleteTextures(1, &texture);
229            return true;
230        }
231    };
232    postMessageAsync(new MessageDestroyGLTexture(texture));
233}
234
235status_t SurfaceFlinger::selectConfigForPixelFormat(
236        EGLDisplay dpy,
237        EGLint const* attrs,
238        PixelFormat format,
239        EGLConfig* outConfig)
240{
241    EGLConfig config = NULL;
242    EGLint numConfigs = -1, n=0;
243    eglGetConfigs(dpy, NULL, 0, &numConfigs);
244    EGLConfig* const configs = new EGLConfig[numConfigs];
245    eglChooseConfig(dpy, attrs, configs, numConfigs, &n);
246    for (int i=0 ; i<n ; i++) {
247        EGLint nativeVisualId = 0;
248        eglGetConfigAttrib(dpy, configs[i], EGL_NATIVE_VISUAL_ID, &nativeVisualId);
249        if (nativeVisualId>0 && format == nativeVisualId) {
250            *outConfig = configs[i];
251            delete [] configs;
252            return NO_ERROR;
253        }
254    }
255    delete [] configs;
256    return NAME_NOT_FOUND;
257}
258
259EGLConfig SurfaceFlinger::selectEGLConfig(EGLDisplay display, EGLint nativeVisualId) {
260    // select our EGLConfig. It must support EGL_RECORDABLE_ANDROID if
261    // it is to be used with WIFI displays
262    EGLConfig config;
263    EGLint dummy;
264    status_t err;
265    EGLint attribs[] = {
266            EGL_SURFACE_TYPE,           EGL_WINDOW_BIT,
267            EGL_RECORDABLE_ANDROID,     EGL_TRUE,
268            EGL_NONE
269    };
270    err = selectConfigForPixelFormat(display, attribs, nativeVisualId, &config);
271    if (err) {
272        // maybe we failed because of EGL_RECORDABLE_ANDROID
273        ALOGW("couldn't find an EGLConfig with EGL_RECORDABLE_ANDROID");
274        attribs[2] = EGL_NONE;
275        err = selectConfigForPixelFormat(display, attribs, nativeVisualId, &config);
276    }
277    ALOGE_IF(err, "couldn't find an EGLConfig matching the screen format");
278    if (eglGetConfigAttrib(display, config, EGL_CONFIG_CAVEAT, &dummy) == EGL_TRUE) {
279        ALOGW_IF(dummy == EGL_SLOW_CONFIG, "EGL_SLOW_CONFIG selected!");
280    }
281    return config;
282}
283
284EGLContext SurfaceFlinger::createGLContext(EGLDisplay display, EGLConfig config) {
285    // Also create our EGLContext
286    EGLint contextAttributes[] = {
287#ifdef EGL_IMG_context_priority
288#ifdef HAS_CONTEXT_PRIORITY
289#warning "using EGL_IMG_context_priority"
290            EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_HIGH_IMG,
291#endif
292#endif
293            EGL_NONE, EGL_NONE
294    };
295    EGLContext ctxt = eglCreateContext(display, config, NULL, contextAttributes);
296    ALOGE_IF(ctxt==EGL_NO_CONTEXT, "EGLContext creation failed");
297    return ctxt;
298}
299
300void SurfaceFlinger::initializeGL(EGLDisplay display, const sp<DisplayDevice>& hw) {
301    EGLBoolean result = DisplayDevice::makeCurrent(display, hw, mEGLContext);
302    if (!result) {
303        ALOGE("Couldn't create a working GLES context. check logs. exiting...");
304        exit(0);
305    }
306
307    GLExtensions& extensions(GLExtensions::getInstance());
308    extensions.initWithGLStrings(
309            glGetString(GL_VENDOR),
310            glGetString(GL_RENDERER),
311            glGetString(GL_VERSION),
312            glGetString(GL_EXTENSIONS),
313            eglQueryString(display, EGL_VENDOR),
314            eglQueryString(display, EGL_VERSION),
315            eglQueryString(display, EGL_EXTENSIONS));
316
317    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
318    glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims);
319
320    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
321    glPixelStorei(GL_PACK_ALIGNMENT, 4);
322    glEnableClientState(GL_VERTEX_ARRAY);
323    glShadeModel(GL_FLAT);
324    glDisable(GL_DITHER);
325    glDisable(GL_CULL_FACE);
326
327    struct pack565 {
328        inline uint16_t operator() (int r, int g, int b) const {
329            return (r<<11)|(g<<5)|b;
330        }
331    } pack565;
332
333    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
334    glGenTextures(1, &mProtectedTexName);
335    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
336    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
337    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
338    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
339    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
340    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
341            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
342
343    // print some debugging info
344    EGLint r,g,b,a;
345    eglGetConfigAttrib(display, mEGLConfig, EGL_RED_SIZE,   &r);
346    eglGetConfigAttrib(display, mEGLConfig, EGL_GREEN_SIZE, &g);
347    eglGetConfigAttrib(display, mEGLConfig, EGL_BLUE_SIZE,  &b);
348    eglGetConfigAttrib(display, mEGLConfig, EGL_ALPHA_SIZE, &a);
349    ALOGI("EGL informations:");
350    ALOGI("vendor    : %s", extensions.getEglVendor());
351    ALOGI("version   : %s", extensions.getEglVersion());
352    ALOGI("extensions: %s", extensions.getEglExtension());
353    ALOGI("Client API: %s", eglQueryString(display, EGL_CLIENT_APIS)?:"Not Supported");
354    ALOGI("EGLSurface: %d-%d-%d-%d, config=%p", r, g, b, a, mEGLConfig);
355    ALOGI("OpenGL ES informations:");
356    ALOGI("vendor    : %s", extensions.getVendor());
357    ALOGI("renderer  : %s", extensions.getRenderer());
358    ALOGI("version   : %s", extensions.getVersion());
359    ALOGI("extensions: %s", extensions.getExtension());
360    ALOGI("GL_MAX_TEXTURE_SIZE = %d", mMaxTextureSize);
361    ALOGI("GL_MAX_VIEWPORT_DIMS = %d x %d", mMaxViewportDims[0], mMaxViewportDims[1]);
362}
363
364status_t SurfaceFlinger::readyToRun()
365{
366    ALOGI(  "SurfaceFlinger's main thread ready to run. "
367            "Initializing graphics H/W...");
368
369    // initialize EGL for the default display
370    mEGLDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
371    eglInitialize(mEGLDisplay, NULL, NULL);
372
373    // Initialize the H/W composer object.  There may or may not be an
374    // actual hardware composer underneath.
375    mHwc = new HWComposer(this,
376            *static_cast<HWComposer::EventHandler *>(this));
377
378    // Initialize the main display
379    // create native window to main display
380    sp<FramebufferSurface> fbs = new FramebufferSurface(*mHwc);
381    if (fbs == NULL) {
382        ALOGE("Display subsystem failed to initialize. check logs. exiting...");
383        exit(0);
384    }
385
386    sp<SurfaceTextureClient> stc(new SurfaceTextureClient(
387            static_cast<sp<ISurfaceTexture> >(fbs->getBufferQueue())));
388
389    // initialize the config and context
390    int format;
391    ANativeWindow* const anw = stc.get();
392    anw->query(anw, NATIVE_WINDOW_FORMAT, &format);
393    mEGLConfig  = selectEGLConfig(mEGLDisplay, format);
394    mEGLContext = createGLContext(mEGLDisplay, mEGLConfig);
395
396    // initialize our main display hardware
397
398    for (size_t i=0 ; i<DisplayDevice::NUM_DISPLAY_TYPES ; i++) {
399        mDefaultDisplays[i] = new BBinder();
400        mCurrentState.displays.add(mDefaultDisplays[i],
401                DisplayDeviceState((DisplayDevice::DisplayType)i));
402    }
403    sp<DisplayDevice> hw = new DisplayDevice(this,
404            DisplayDevice::DISPLAY_PRIMARY,
405            mDefaultDisplays[DisplayDevice::DISPLAY_PRIMARY],
406            anw, fbs, mEGLConfig);
407    mDisplays.add(mDefaultDisplays[DisplayDevice::DISPLAY_PRIMARY], hw);
408
409    //  initialize OpenGL ES
410    initializeGL(mEGLDisplay, hw);
411
412    // start the EventThread
413    mEventThread = new EventThread(this);
414    mEventQueue.setEventThread(mEventThread);
415
416    // initialize our drawing state
417    mDrawingState = mCurrentState;
418
419    // We're now ready to accept clients...
420    mReadyToRunBarrier.open();
421
422    // set initial conditions (e.g. unblank default device)
423    initializeDisplays();
424
425    // start boot animation
426    startBootAnim();
427
428    return NO_ERROR;
429}
430
431int32_t SurfaceFlinger::allocateHwcDisplayId(DisplayDevice::DisplayType type) {
432    return (uint32_t(type) < DisplayDevice::NUM_DISPLAY_TYPES) ?
433            type : mHwc->allocateDisplayId();
434}
435
436void SurfaceFlinger::startBootAnim() {
437    // start boot animation
438    property_set("service.bootanim.exit", "0");
439    property_set("ctl.start", "bootanim");
440}
441
442uint32_t SurfaceFlinger::getMaxTextureSize() const {
443    return mMaxTextureSize;
444}
445
446uint32_t SurfaceFlinger::getMaxViewportDims() const {
447    return mMaxViewportDims[0] < mMaxViewportDims[1] ?
448            mMaxViewportDims[0] : mMaxViewportDims[1];
449}
450
451// ----------------------------------------------------------------------------
452
453bool SurfaceFlinger::authenticateSurfaceTexture(
454        const sp<ISurfaceTexture>& surfaceTexture) const {
455    Mutex::Autolock _l(mStateLock);
456    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
457
458    // Check the visible layer list for the ISurface
459    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
460    size_t count = currentLayers.size();
461    for (size_t i=0 ; i<count ; i++) {
462        const sp<LayerBase>& layer(currentLayers[i]);
463        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
464        if (lbc != NULL) {
465            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
466            if (lbcBinder == surfaceTextureBinder) {
467                return true;
468            }
469        }
470    }
471
472    // Check the layers in the purgatory.  This check is here so that if a
473    // SurfaceTexture gets destroyed before all the clients are done using it,
474    // the error will not be reported as "surface XYZ is not authenticated", but
475    // will instead fail later on when the client tries to use the surface,
476    // which should be reported as "surface XYZ returned an -ENODEV".  The
477    // purgatorized layers are no less authentic than the visible ones, so this
478    // should not cause any harm.
479    size_t purgatorySize =  mLayerPurgatory.size();
480    for (size_t i=0 ; i<purgatorySize ; i++) {
481        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
482        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
483        if (lbc != NULL) {
484            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
485            if (lbcBinder == surfaceTextureBinder) {
486                return true;
487            }
488        }
489    }
490
491    return false;
492}
493
494status_t SurfaceFlinger::getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info) {
495    // TODO: this is mostly here only for compatibility
496    //       the display size is needed but the display metrics should come from elsewhere
497    if (display != mDefaultDisplays[ISurfaceComposer::eDisplayIdMain]) {
498        // TODO: additional displays not yet supported
499        return BAD_INDEX;
500    }
501
502    const HWComposer& hwc(getHwComposer());
503    float xdpi = hwc.getDpiX(HWC_DISPLAY_PRIMARY);
504    float ydpi = hwc.getDpiY(HWC_DISPLAY_PRIMARY);
505
506    // TODO: Not sure if display density should handled by SF any longer
507    class Density {
508        static int getDensityFromProperty(char const* propName) {
509            char property[PROPERTY_VALUE_MAX];
510            int density = 0;
511            if (property_get(propName, property, NULL) > 0) {
512                density = atoi(property);
513            }
514            return density;
515        }
516    public:
517        static int getEmuDensity() {
518            return getDensityFromProperty("qemu.sf.lcd_density"); }
519        static int getBuildDensity()  {
520            return getDensityFromProperty("ro.sf.lcd_density"); }
521    };
522    // The density of the device is provided by a build property
523    float density = Density::getBuildDensity() / 160.0f;
524    if (density == 0) {
525        // the build doesn't provide a density -- this is wrong!
526        // use xdpi instead
527        ALOGE("ro.sf.lcd_density must be defined as a build property");
528        density = xdpi / 160.0f;
529    }
530    if (Density::getEmuDensity()) {
531        // if "qemu.sf.lcd_density" is specified, it overrides everything
532        xdpi = ydpi = density = Density::getEmuDensity();
533        density /= 160.0f;
534    }
535
536    sp<const DisplayDevice> hw(getDefaultDisplayDevice());
537    info->w = hw->getWidth();
538    info->h = hw->getHeight();
539    info->xdpi = xdpi;
540    info->ydpi = ydpi;
541    info->fps = float(1e9 / hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY));
542    info->density = density;
543    info->orientation = hw->getOrientation();
544    // TODO: this needs to go away (currently needed only by webkit)
545    getPixelFormatInfo(hw->getFormat(), &info->pixelFormatInfo);
546    return NO_ERROR;
547}
548
549// ----------------------------------------------------------------------------
550
551sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
552    return mEventThread->createEventConnection();
553}
554
555void SurfaceFlinger::connectDisplay(const sp<ISurfaceTexture>& surface) {
556
557    sp<IBinder> token;
558    { // scope for the lock
559        Mutex::Autolock _l(mStateLock);
560        token = mExtDisplayToken;
561    }
562
563    if (token == 0) {
564        token = createDisplay();
565    }
566
567    { // scope for the lock
568        Mutex::Autolock _l(mStateLock);
569        if (surface == 0) {
570            // release our current display. we're guarantee to have
571            // a reference to it (token), while we hold the lock
572            mExtDisplayToken = 0;
573        } else {
574            mExtDisplayToken = token;
575        }
576
577        DisplayDeviceState& info(mCurrentState.displays.editValueFor(token));
578        info.surface = surface;
579        setTransactionFlags(eDisplayTransactionNeeded);
580    }
581}
582
583// ----------------------------------------------------------------------------
584
585void SurfaceFlinger::waitForEvent() {
586    mEventQueue.waitMessage();
587}
588
589void SurfaceFlinger::signalTransaction() {
590    mEventQueue.invalidate();
591}
592
593void SurfaceFlinger::signalLayerUpdate() {
594    mEventQueue.invalidate();
595}
596
597void SurfaceFlinger::signalRefresh() {
598    mEventQueue.refresh();
599}
600
601status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
602        nsecs_t reltime, uint32_t flags) {
603    return mEventQueue.postMessage(msg, reltime);
604}
605
606status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
607        nsecs_t reltime, uint32_t flags) {
608    status_t res = mEventQueue.postMessage(msg, reltime);
609    if (res == NO_ERROR) {
610        msg->wait();
611    }
612    return res;
613}
614
615bool SurfaceFlinger::threadLoop() {
616    waitForEvent();
617    return true;
618}
619
620void SurfaceFlinger::onVSyncReceived(int type, nsecs_t timestamp) {
621    if (mEventThread == NULL) {
622        // This is a temporary workaround for b/7145521.  A non-null pointer
623        // does not mean EventThread has finished initializing, so this
624        // is not a correct fix.
625        ALOGW("WARNING: EventThread not started, ignoring vsync");
626        return;
627    }
628    if (uint32_t(type) < DisplayDevice::NUM_DISPLAY_TYPES) {
629        // we should only receive DisplayDevice::DisplayType from the vsync callback
630        const wp<IBinder>& token(mDefaultDisplays[type]);
631        mEventThread->onVSyncReceived(token, timestamp);
632    }
633}
634
635void SurfaceFlinger::eventControl(int event, int enabled) {
636    getHwComposer().eventControl(event, enabled);
637}
638
639void SurfaceFlinger::onMessageReceived(int32_t what) {
640    ATRACE_CALL();
641    switch (what) {
642    case MessageQueue::INVALIDATE:
643        handleMessageTransaction();
644        handleMessageInvalidate();
645        signalRefresh();
646        break;
647    case MessageQueue::REFRESH:
648        handleMessageRefresh();
649        break;
650    }
651}
652
653void SurfaceFlinger::handleMessageTransaction() {
654    uint32_t transactionFlags = peekTransactionFlags(eTransactionMask);
655    if (transactionFlags) {
656        handleTransaction(transactionFlags);
657    }
658}
659
660void SurfaceFlinger::handleMessageInvalidate() {
661    ATRACE_CALL();
662    handlePageFlip();
663}
664
665void SurfaceFlinger::handleMessageRefresh() {
666    ATRACE_CALL();
667    preComposition();
668    rebuildLayerStacks();
669    setUpHWComposer();
670    doDebugFlashRegions();
671    doComposition();
672    postComposition();
673}
674
675void SurfaceFlinger::doDebugFlashRegions()
676{
677    // is debugging enabled
678    if (CC_LIKELY(!mDebugRegion))
679        return;
680
681    const bool repaintEverything = mRepaintEverything;
682    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
683        const sp<DisplayDevice>& hw(mDisplays[dpy]);
684        if (hw->canDraw()) {
685            // transform the dirty region into this screen's coordinate space
686            const Region dirtyRegion(hw->getDirtyRegion(repaintEverything));
687            if (!dirtyRegion.isEmpty()) {
688                // redraw the whole screen
689                doComposeSurfaces(hw, Region(hw->bounds()));
690
691                // and draw the dirty region
692                glDisable(GL_TEXTURE_EXTERNAL_OES);
693                glDisable(GL_TEXTURE_2D);
694                glDisable(GL_BLEND);
695                glColor4f(1, 0, 1, 1);
696                const int32_t height = hw->getHeight();
697                Region::const_iterator it = dirtyRegion.begin();
698                Region::const_iterator const end = dirtyRegion.end();
699                while (it != end) {
700                    const Rect& r = *it++;
701                    GLfloat vertices[][2] = {
702                            { r.left,  height - r.top },
703                            { r.left,  height - r.bottom },
704                            { r.right, height - r.bottom },
705                            { r.right, height - r.top }
706                    };
707                    glVertexPointer(2, GL_FLOAT, 0, vertices);
708                    glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
709                }
710                hw->compositionComplete();
711                // FIXME
712                if (hw->getDisplayType() >= DisplayDevice::DISPLAY_VIRTUAL) {
713                    eglSwapBuffers(mEGLDisplay, hw->getEGLSurface());
714                }
715            }
716        }
717    }
718
719    postFramebuffer();
720
721    if (mDebugRegion > 1) {
722        usleep(mDebugRegion * 1000);
723    }
724}
725
726void SurfaceFlinger::preComposition()
727{
728    bool needExtraInvalidate = false;
729    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
730    const size_t count = currentLayers.size();
731    for (size_t i=0 ; i<count ; i++) {
732        if (currentLayers[i]->onPreComposition()) {
733            needExtraInvalidate = true;
734        }
735    }
736    if (needExtraInvalidate) {
737        signalLayerUpdate();
738    }
739}
740
741void SurfaceFlinger::postComposition()
742{
743    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
744    const size_t count = currentLayers.size();
745    for (size_t i=0 ; i<count ; i++) {
746        currentLayers[i]->onPostComposition();
747    }
748}
749
750void SurfaceFlinger::rebuildLayerStacks() {
751    // rebuild the visible layer list per screen
752    if (CC_UNLIKELY(mVisibleRegionsDirty)) {
753        ATRACE_CALL();
754        mVisibleRegionsDirty = false;
755        invalidateHwcGeometry();
756
757        const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
758        for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
759            Region opaqueRegion;
760            Region dirtyRegion;
761            Vector< sp<LayerBase> > layersSortedByZ;
762            const sp<DisplayDevice>& hw(mDisplays[dpy]);
763            const Transform& tr(hw->getTransform());
764            const Rect bounds(hw->getBounds());
765            if (hw->canDraw()) {
766                SurfaceFlinger::computeVisibleRegions(currentLayers,
767                        hw->getLayerStack(), dirtyRegion, opaqueRegion);
768
769                const size_t count = currentLayers.size();
770                for (size_t i=0 ; i<count ; i++) {
771                    const sp<LayerBase>& layer(currentLayers[i]);
772                    const Layer::State& s(layer->drawingState());
773                    if (s.layerStack == hw->getLayerStack()) {
774                        Region visibleRegion(tr.transform(layer->visibleRegion));
775                        visibleRegion.andSelf(bounds);
776                        if (!visibleRegion.isEmpty()) {
777                            layersSortedByZ.add(layer);
778                        }
779                    }
780                }
781            }
782            hw->setVisibleLayersSortedByZ(layersSortedByZ);
783            hw->undefinedRegion.set(bounds);
784            hw->undefinedRegion.subtractSelf(tr.transform(opaqueRegion));
785            hw->dirtyRegion.orSelf(dirtyRegion);
786        }
787    }
788}
789
790void SurfaceFlinger::setUpHWComposer() {
791    HWComposer& hwc(getHwComposer());
792    if (hwc.initCheck() == NO_ERROR) {
793        // build the h/w work list
794        const bool workListsDirty = mHwWorkListDirty;
795        mHwWorkListDirty = false;
796        for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
797            sp<const DisplayDevice> hw(mDisplays[dpy]);
798            const int32_t id = hw->getHwcDisplayId();
799            if (id >= 0) {
800                const Vector< sp<LayerBase> >& currentLayers(
801                    hw->getVisibleLayersSortedByZ());
802                const size_t count = currentLayers.size();
803                if (hwc.createWorkList(id, count) >= 0) {
804                    HWComposer::LayerListIterator cur = hwc.begin(id);
805                    const HWComposer::LayerListIterator end = hwc.end(id);
806                    for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
807                        const sp<LayerBase>& layer(currentLayers[i]);
808
809                        if (CC_UNLIKELY(workListsDirty)) {
810                            layer->setGeometry(hw, *cur);
811                            if (mDebugDisableHWC || mDebugRegion) {
812                                cur->setSkip(true);
813                            }
814                        }
815
816                        /*
817                         * update the per-frame h/w composer data for each layer
818                         * and build the transparent region of the FB
819                         */
820                        layer->setPerFrameData(hw, *cur);
821                    }
822                }
823            }
824        }
825        status_t err = hwc.prepare();
826        ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
827    }
828}
829
830void SurfaceFlinger::doComposition() {
831    ATRACE_CALL();
832    const bool repaintEverything = android_atomic_and(0, &mRepaintEverything);
833    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
834        const sp<DisplayDevice>& hw(mDisplays[dpy]);
835        if (hw->canDraw()) {
836            // transform the dirty region into this screen's coordinate space
837            const Region dirtyRegion(hw->getDirtyRegion(repaintEverything));
838            if (!dirtyRegion.isEmpty()) {
839                // repaint the framebuffer (if needed)
840                doDisplayComposition(hw, dirtyRegion);
841            }
842            hw->dirtyRegion.clear();
843            hw->flip(hw->swapRegion);
844            hw->swapRegion.clear();
845        }
846        // inform the h/w that we're done compositing
847        hw->compositionComplete();
848    }
849    postFramebuffer();
850}
851
852void SurfaceFlinger::postFramebuffer()
853{
854    ATRACE_CALL();
855
856    const nsecs_t now = systemTime();
857    mDebugInSwapBuffers = now;
858
859    HWComposer& hwc(getHwComposer());
860    if (hwc.initCheck() == NO_ERROR) {
861        // FIXME: EGL spec says:
862        //   "surface must be bound to the calling thread's current context,
863        //    for the current rendering API."
864        DisplayDevice::makeCurrent(mEGLDisplay, getDefaultDisplayDevice(), mEGLContext);
865        hwc.commit();
866    }
867
868    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
869        sp<const DisplayDevice> hw(mDisplays[dpy]);
870        const Vector< sp<LayerBase> >& currentLayers(hw->getVisibleLayersSortedByZ());
871        const size_t count = currentLayers.size();
872        int32_t id = hw->getHwcDisplayId();
873        if (id >=0 && hwc.initCheck() == NO_ERROR) {
874            HWComposer::LayerListIterator cur = hwc.begin(id);
875            const HWComposer::LayerListIterator end = hwc.end(id);
876            for (size_t i = 0; cur != end && i < count; ++i, ++cur) {
877                currentLayers[i]->onLayerDisplayed(hw, &*cur);
878            }
879        } else {
880            for (size_t i = 0; i < count; i++) {
881                currentLayers[i]->onLayerDisplayed(hw, NULL);
882            }
883        }
884    }
885
886    mLastSwapBufferTime = systemTime() - now;
887    mDebugInSwapBuffers = 0;
888}
889
890void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
891{
892    ATRACE_CALL();
893
894    Mutex::Autolock _l(mStateLock);
895    const nsecs_t now = systemTime();
896    mDebugInTransaction = now;
897
898    // Here we're guaranteed that some transaction flags are set
899    // so we can call handleTransactionLocked() unconditionally.
900    // We call getTransactionFlags(), which will also clear the flags,
901    // with mStateLock held to guarantee that mCurrentState won't change
902    // until the transaction is committed.
903
904    transactionFlags = getTransactionFlags(eTransactionMask);
905    handleTransactionLocked(transactionFlags);
906
907    mLastTransactionTime = systemTime() - now;
908    mDebugInTransaction = 0;
909    invalidateHwcGeometry();
910    // here the transaction has been committed
911}
912
913void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
914{
915    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
916    const size_t count = currentLayers.size();
917
918    /*
919     * Traversal of the children
920     * (perform the transaction for each of them if needed)
921     */
922
923    if (transactionFlags & eTraversalNeeded) {
924        for (size_t i=0 ; i<count ; i++) {
925            const sp<LayerBase>& layer = currentLayers[i];
926            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
927            if (!trFlags) continue;
928
929            const uint32_t flags = layer->doTransaction(0);
930            if (flags & Layer::eVisibleRegion)
931                mVisibleRegionsDirty = true;
932        }
933    }
934
935    /*
936     * Perform display own transactions if needed
937     */
938
939    if (transactionFlags & eDisplayTransactionNeeded) {
940        // here we take advantage of Vector's copy-on-write semantics to
941        // improve performance by skipping the transaction entirely when
942        // know that the lists are identical
943        const KeyedVector<  wp<IBinder>, DisplayDeviceState>& curr(mCurrentState.displays);
944        const KeyedVector<  wp<IBinder>, DisplayDeviceState>& draw(mDrawingState.displays);
945        if (!curr.isIdenticalTo(draw)) {
946            mVisibleRegionsDirty = true;
947            const size_t cc = curr.size();
948                  size_t dc = draw.size();
949
950            // find the displays that were removed
951            // (ie: in drawing state but not in current state)
952            // also handle displays that changed
953            // (ie: displays that are in both lists)
954            for (size_t i=0 ; i<dc ; i++) {
955                const ssize_t j = curr.indexOfKey(draw.keyAt(i));
956                if (j < 0) {
957                    // in drawing state but not in current state
958                    if (!draw[i].isMainDisplay()) {
959                        mDisplays.removeItem(draw.keyAt(i));
960                    } else {
961                        ALOGW("trying to remove the main display");
962                    }
963                } else {
964                    // this display is in both lists. see if something changed.
965                    const DisplayDeviceState& state(curr[j]);
966                    const wp<IBinder>& display(curr.keyAt(j));
967                    if (state.surface->asBinder() != draw[i].surface->asBinder()) {
968                        // changing the surface is like destroying and
969                        // recreating the DisplayDevice, so we just remove it
970                        // from the drawing state, so that it get re-added
971                        // below.
972                        mDisplays.removeItem(display);
973                        mDrawingState.displays.removeItemsAt(i);
974                        dc--; i--;
975                        // at this point we must loop to the next item
976                        continue;
977                    }
978
979                    const sp<DisplayDevice>& disp(getDisplayDevice(display));
980                    if (disp != NULL) {
981                        if (state.layerStack != draw[i].layerStack) {
982                            disp->setLayerStack(state.layerStack);
983                        }
984                        if ((state.orientation != draw[i].orientation)
985                                || (state.viewport != draw[i].viewport)
986                                || (state.frame != draw[i].frame))
987                        {
988                            disp->setProjection(state.orientation,
989                                    state.viewport, state.frame);
990                        }
991                    }
992                }
993            }
994
995            // find displays that were added
996            // (ie: in current state but not in drawing state)
997            for (size_t i=0 ; i<cc ; i++) {
998                if (draw.indexOfKey(curr.keyAt(i)) < 0) {
999                    const DisplayDeviceState& state(curr[i]);
1000                    if (state.surface != NULL) {
1001                        sp<SurfaceTextureClient> stc(
1002                                new SurfaceTextureClient(state.surface));
1003                        const wp<IBinder>& display(curr.keyAt(i));
1004                        sp<DisplayDevice> disp = new DisplayDevice(this,
1005                                state.type, display, stc, 0, mEGLConfig);
1006                        disp->setLayerStack(state.layerStack);
1007                        disp->setProjection(state.orientation,
1008                                state.viewport, state.frame);
1009                        mDisplays.add(display, disp);
1010                    }
1011                }
1012            }
1013        }
1014    }
1015
1016    /*
1017     * Perform our own transaction if needed
1018     */
1019
1020    const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
1021    if (currentLayers.size() > previousLayers.size()) {
1022        // layers have been added
1023        mVisibleRegionsDirty = true;
1024    }
1025
1026    // some layers might have been removed, so
1027    // we need to update the regions they're exposing.
1028    if (mLayersRemoved) {
1029        mLayersRemoved = false;
1030        mVisibleRegionsDirty = true;
1031        const size_t count = previousLayers.size();
1032        for (size_t i=0 ; i<count ; i++) {
1033            const sp<LayerBase>& layer(previousLayers[i]);
1034            if (currentLayers.indexOf(layer) < 0) {
1035                // this layer is not visible anymore
1036                // TODO: we could traverse the tree from front to back and
1037                //       compute the actual visible region
1038                // TODO: we could cache the transformed region
1039                const Layer::State& s(layer->drawingState());
1040                Region visibleReg = s.transform.transform(
1041                        Region(Rect(s.active.w, s.active.h)));
1042                invalidateLayerStack(s.layerStack, visibleReg);
1043            }
1044        }
1045    }
1046
1047    commitTransaction();
1048}
1049
1050void SurfaceFlinger::commitTransaction()
1051{
1052    if (!mLayersPendingRemoval.isEmpty()) {
1053        // Notify removed layers now that they can't be drawn from
1054        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
1055            mLayersPendingRemoval[i]->onRemoved();
1056        }
1057        mLayersPendingRemoval.clear();
1058    }
1059
1060    mDrawingState = mCurrentState;
1061    mTransationPending = false;
1062    mTransactionCV.broadcast();
1063}
1064
1065void SurfaceFlinger::computeVisibleRegions(
1066        const LayerVector& currentLayers, uint32_t layerStack,
1067        Region& outDirtyRegion, Region& outOpaqueRegion)
1068{
1069    ATRACE_CALL();
1070
1071    Region aboveOpaqueLayers;
1072    Region aboveCoveredLayers;
1073    Region dirty;
1074
1075    outDirtyRegion.clear();
1076
1077    size_t i = currentLayers.size();
1078    while (i--) {
1079        const sp<LayerBase>& layer = currentLayers[i];
1080
1081        // start with the whole surface at its current location
1082        const Layer::State& s(layer->drawingState());
1083
1084        // only consider the layers on the given later stack
1085        if (s.layerStack != layerStack)
1086            continue;
1087
1088        /*
1089         * opaqueRegion: area of a surface that is fully opaque.
1090         */
1091        Region opaqueRegion;
1092
1093        /*
1094         * visibleRegion: area of a surface that is visible on screen
1095         * and not fully transparent. This is essentially the layer's
1096         * footprint minus the opaque regions above it.
1097         * Areas covered by a translucent surface are considered visible.
1098         */
1099        Region visibleRegion;
1100
1101        /*
1102         * coveredRegion: area of a surface that is covered by all
1103         * visible regions above it (which includes the translucent areas).
1104         */
1105        Region coveredRegion;
1106
1107
1108        // handle hidden surfaces by setting the visible region to empty
1109        if (CC_LIKELY(!(s.flags & layer_state_t::eLayerHidden) && s.alpha)) {
1110            const bool translucent = !layer->isOpaque();
1111            Rect bounds(layer->computeBounds());
1112            visibleRegion.set(bounds);
1113            if (!visibleRegion.isEmpty()) {
1114                // Remove the transparent area from the visible region
1115                if (translucent) {
1116                    Region transparentRegionScreen;
1117                    const Transform tr(s.transform);
1118                    if (tr.transformed()) {
1119                        if (tr.preserveRects()) {
1120                            // transform the transparent region
1121                            transparentRegionScreen = tr.transform(s.transparentRegion);
1122                        } else {
1123                            // transformation too complex, can't do the
1124                            // transparent region optimization.
1125                            transparentRegionScreen.clear();
1126                        }
1127                    } else {
1128                        transparentRegionScreen = s.transparentRegion;
1129                    }
1130                    visibleRegion.subtractSelf(transparentRegionScreen);
1131                }
1132
1133                // compute the opaque region
1134                const int32_t layerOrientation = s.transform.getOrientation();
1135                if (s.alpha==255 && !translucent &&
1136                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
1137                    // the opaque region is the layer's footprint
1138                    opaqueRegion = visibleRegion;
1139                }
1140            }
1141        }
1142
1143        // Clip the covered region to the visible region
1144        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
1145
1146        // Update aboveCoveredLayers for next (lower) layer
1147        aboveCoveredLayers.orSelf(visibleRegion);
1148
1149        // subtract the opaque region covered by the layers above us
1150        visibleRegion.subtractSelf(aboveOpaqueLayers);
1151
1152        // compute this layer's dirty region
1153        if (layer->contentDirty) {
1154            // we need to invalidate the whole region
1155            dirty = visibleRegion;
1156            // as well, as the old visible region
1157            dirty.orSelf(layer->visibleRegion);
1158            layer->contentDirty = false;
1159        } else {
1160            /* compute the exposed region:
1161             *   the exposed region consists of two components:
1162             *   1) what's VISIBLE now and was COVERED before
1163             *   2) what's EXPOSED now less what was EXPOSED before
1164             *
1165             * note that (1) is conservative, we start with the whole
1166             * visible region but only keep what used to be covered by
1167             * something -- which mean it may have been exposed.
1168             *
1169             * (2) handles areas that were not covered by anything but got
1170             * exposed because of a resize.
1171             */
1172            const Region newExposed = visibleRegion - coveredRegion;
1173            const Region oldVisibleRegion = layer->visibleRegion;
1174            const Region oldCoveredRegion = layer->coveredRegion;
1175            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
1176            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
1177        }
1178        dirty.subtractSelf(aboveOpaqueLayers);
1179
1180        // accumulate to the screen dirty region
1181        outDirtyRegion.orSelf(dirty);
1182
1183        // Update aboveOpaqueLayers for next (lower) layer
1184        aboveOpaqueLayers.orSelf(opaqueRegion);
1185
1186        // Store the visible region is screen space
1187        layer->setVisibleRegion(visibleRegion);
1188        layer->setCoveredRegion(coveredRegion);
1189    }
1190
1191    outOpaqueRegion = aboveOpaqueLayers;
1192}
1193
1194void SurfaceFlinger::invalidateLayerStack(uint32_t layerStack,
1195        const Region& dirty) {
1196    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
1197        const sp<DisplayDevice>& hw(mDisplays[dpy]);
1198        if (hw->getLayerStack() == layerStack) {
1199            hw->dirtyRegion.orSelf(dirty);
1200        }
1201    }
1202}
1203
1204void SurfaceFlinger::handlePageFlip()
1205{
1206    Region dirtyRegion;
1207
1208    bool visibleRegions = false;
1209    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
1210    const size_t count = currentLayers.size();
1211    for (size_t i=0 ; i<count ; i++) {
1212        const sp<LayerBase>& layer(currentLayers[i]);
1213        const Region dirty(layer->latchBuffer(visibleRegions));
1214        const Layer::State& s(layer->drawingState());
1215        invalidateLayerStack(s.layerStack, dirty);
1216    }
1217
1218    mVisibleRegionsDirty |= visibleRegions;
1219}
1220
1221void SurfaceFlinger::invalidateHwcGeometry()
1222{
1223    mHwWorkListDirty = true;
1224}
1225
1226
1227void SurfaceFlinger::doDisplayComposition(const sp<const DisplayDevice>& hw,
1228        const Region& inDirtyRegion)
1229{
1230    Region dirtyRegion(inDirtyRegion);
1231
1232    // compute the invalid region
1233    hw->swapRegion.orSelf(dirtyRegion);
1234
1235    uint32_t flags = hw->getFlags();
1236    if (flags & DisplayDevice::SWAP_RECTANGLE) {
1237        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
1238        // takes a rectangle, we must make sure to update that whole
1239        // rectangle in that case
1240        dirtyRegion.set(hw->swapRegion.bounds());
1241    } else {
1242        if (flags & DisplayDevice::PARTIAL_UPDATES) {
1243            // We need to redraw the rectangle that will be updated
1244            // (pushed to the framebuffer).
1245            // This is needed because PARTIAL_UPDATES only takes one
1246            // rectangle instead of a region (see DisplayDevice::flip())
1247            dirtyRegion.set(hw->swapRegion.bounds());
1248        } else {
1249            // we need to redraw everything (the whole screen)
1250            dirtyRegion.set(hw->bounds());
1251            hw->swapRegion = dirtyRegion;
1252        }
1253    }
1254
1255    doComposeSurfaces(hw, dirtyRegion);
1256
1257    // FIXME: we need to call eglSwapBuffers() on displays that have
1258    // GL composition and only on those.
1259    // however, currently hwc.commit() already does that for the main
1260    // display (if there is a hwc) and never for the other ones
1261    if (hw->getDisplayType() >= DisplayDevice::DISPLAY_VIRTUAL ||
1262            getHwComposer().initCheck() != NO_ERROR) {
1263        // FIXME: EGL spec says:
1264        //   "surface must be bound to the calling thread's current context,
1265        //    for the current rendering API."
1266        eglSwapBuffers(mEGLDisplay, hw->getEGLSurface());
1267    }
1268
1269    // update the swap region and clear the dirty region
1270    hw->swapRegion.orSelf(dirtyRegion);
1271}
1272
1273void SurfaceFlinger::doComposeSurfaces(const sp<const DisplayDevice>& hw, const Region& dirty)
1274{
1275    const int32_t id = hw->getHwcDisplayId();
1276    HWComposer& hwc(getHwComposer());
1277    HWComposer::LayerListIterator cur = hwc.begin(id);
1278    const HWComposer::LayerListIterator end = hwc.end(id);
1279
1280    const bool hasGlesComposition = hwc.hasGlesComposition(id) || (cur==end);
1281    if (hasGlesComposition) {
1282        DisplayDevice::makeCurrent(mEGLDisplay, hw, mEGLContext);
1283
1284        // set the frame buffer
1285        glMatrixMode(GL_MODELVIEW);
1286        glLoadIdentity();
1287
1288        // Never touch the framebuffer if we don't have any framebuffer layers
1289        const bool hasHwcComposition = hwc.hasHwcComposition(id);
1290        if (hasHwcComposition) {
1291            // when using overlays, we assume a fully transparent framebuffer
1292            // NOTE: we could reduce how much we need to clear, for instance
1293            // remove where there are opaque FB layers. however, on some
1294            // GPUs doing a "clean slate" glClear might be more efficient.
1295            // We'll revisit later if needed.
1296            glClearColor(0, 0, 0, 0);
1297            glClear(GL_COLOR_BUFFER_BIT);
1298        } else {
1299            const Region region(hw->undefinedRegion.intersect(dirty));
1300            // screen is already cleared here
1301            if (!region.isEmpty()) {
1302                // can happen with SurfaceView
1303                drawWormhole(hw, region);
1304            }
1305        }
1306    }
1307
1308    /*
1309     * and then, render the layers targeted at the framebuffer
1310     */
1311
1312    const Vector< sp<LayerBase> >& layers(hw->getVisibleLayersSortedByZ());
1313    const size_t count = layers.size();
1314    const Transform& tr = hw->getTransform();
1315    if (cur != end) {
1316        // we're using h/w composer
1317        for (size_t i=0 ; i<count && cur!=end ; ++i, ++cur) {
1318            const sp<LayerBase>& layer(layers[i]);
1319            const Region clip(dirty.intersect(tr.transform(layer->visibleRegion)));
1320            if (!clip.isEmpty()) {
1321                switch (cur->getCompositionType()) {
1322                    case HWC_OVERLAY: {
1323                        if ((cur->getHints() & HWC_HINT_CLEAR_FB)
1324                                && i
1325                                && layer->isOpaque()
1326                                && hasGlesComposition) {
1327                            // never clear the very first layer since we're
1328                            // guaranteed the FB is already cleared
1329                            layer->clearWithOpenGL(hw, clip);
1330                        }
1331                        break;
1332                    }
1333                    case HWC_FRAMEBUFFER: {
1334                        layer->draw(hw, clip);
1335                        break;
1336                    }
1337                }
1338            }
1339            layer->setAcquireFence(hw, *cur);
1340        }
1341    } else {
1342        // we're not using h/w composer
1343        for (size_t i=0 ; i<count ; ++i) {
1344            const sp<LayerBase>& layer(layers[i]);
1345            const Region clip(dirty.intersect(
1346                    tr.transform(layer->visibleRegion)));
1347            if (!clip.isEmpty()) {
1348                layer->draw(hw, clip);
1349            }
1350        }
1351    }
1352}
1353
1354void SurfaceFlinger::drawWormhole(const sp<const DisplayDevice>& hw,
1355        const Region& region) const
1356{
1357    glDisable(GL_TEXTURE_EXTERNAL_OES);
1358    glDisable(GL_TEXTURE_2D);
1359    glDisable(GL_BLEND);
1360    glColor4f(0,0,0,0);
1361
1362    const int32_t height = hw->getHeight();
1363    Region::const_iterator it = region.begin();
1364    Region::const_iterator const end = region.end();
1365    while (it != end) {
1366        const Rect& r = *it++;
1367        GLfloat vertices[][2] = {
1368                { r.left,  height - r.top },
1369                { r.left,  height - r.bottom },
1370                { r.right, height - r.bottom },
1371                { r.right, height - r.top }
1372        };
1373        glVertexPointer(2, GL_FLOAT, 0, vertices);
1374        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1375    }
1376}
1377
1378ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1379        const sp<LayerBaseClient>& lbc)
1380{
1381    // attach this layer to the client
1382    size_t name = client->attachLayer(lbc);
1383
1384    // add this layer to the current state list
1385    Mutex::Autolock _l(mStateLock);
1386    mCurrentState.layersSortedByZ.add(lbc);
1387
1388    return ssize_t(name);
1389}
1390
1391status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1392{
1393    Mutex::Autolock _l(mStateLock);
1394    status_t err = purgatorizeLayer_l(layer);
1395    if (err == NO_ERROR)
1396        setTransactionFlags(eTransactionNeeded);
1397    return err;
1398}
1399
1400status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1401{
1402    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1403    if (index >= 0) {
1404        mLayersRemoved = true;
1405        return NO_ERROR;
1406    }
1407    return status_t(index);
1408}
1409
1410status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1411{
1412    // First add the layer to the purgatory list, which makes sure it won't
1413    // go away, then remove it from the main list (through a transaction).
1414    ssize_t err = removeLayer_l(layerBase);
1415    if (err >= 0) {
1416        mLayerPurgatory.add(layerBase);
1417    }
1418
1419    mLayersPendingRemoval.push(layerBase);
1420
1421    // it's possible that we don't find a layer, because it might
1422    // have been destroyed already -- this is not technically an error
1423    // from the user because there is a race between Client::destroySurface(),
1424    // ~Client() and ~ISurface().
1425    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1426}
1427
1428uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1429{
1430    return android_atomic_release_load(&mTransactionFlags);
1431}
1432
1433uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1434{
1435    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1436}
1437
1438uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1439{
1440    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1441    if ((old & flags)==0) { // wake the server up
1442        signalTransaction();
1443    }
1444    return old;
1445}
1446
1447void SurfaceFlinger::setTransactionState(
1448        const Vector<ComposerState>& state,
1449        const Vector<DisplayState>& displays,
1450        uint32_t flags)
1451{
1452    Mutex::Autolock _l(mStateLock);
1453    uint32_t transactionFlags = 0;
1454
1455    size_t count = displays.size();
1456    for (size_t i=0 ; i<count ; i++) {
1457        const DisplayState& s(displays[i]);
1458        transactionFlags |= setDisplayStateLocked(s);
1459    }
1460
1461    count = state.size();
1462    for (size_t i=0 ; i<count ; i++) {
1463        const ComposerState& s(state[i]);
1464        sp<Client> client( static_cast<Client *>(s.client.get()) );
1465        transactionFlags |= setClientStateLocked(client, s.state);
1466    }
1467
1468    if (transactionFlags) {
1469        // this triggers the transaction
1470        setTransactionFlags(transactionFlags);
1471
1472        // if this is a synchronous transaction, wait for it to take effect
1473        // before returning.
1474        if (flags & eSynchronous) {
1475            mTransationPending = true;
1476        }
1477        while (mTransationPending) {
1478            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1479            if (CC_UNLIKELY(err != NO_ERROR)) {
1480                // just in case something goes wrong in SF, return to the
1481                // called after a few seconds.
1482                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1483                mTransationPending = false;
1484                break;
1485            }
1486        }
1487    }
1488}
1489
1490uint32_t SurfaceFlinger::setDisplayStateLocked(const DisplayState& s)
1491{
1492    uint32_t flags = 0;
1493    DisplayDeviceState& disp(mCurrentState.displays.editValueFor(s.token));
1494    if (disp.isValid()) {
1495        const uint32_t what = s.what;
1496        if (what & DisplayState::eSurfaceChanged) {
1497            if (disp.surface->asBinder() != s.surface->asBinder()) {
1498                disp.surface = s.surface;
1499                flags |= eDisplayTransactionNeeded;
1500            }
1501        }
1502        if (what & DisplayState::eLayerStackChanged) {
1503            if (disp.layerStack != s.layerStack) {
1504                disp.layerStack = s.layerStack;
1505                flags |= eDisplayTransactionNeeded;
1506            }
1507        }
1508        if (what & DisplayState::eDisplayProjectionChanged) {
1509            if (disp.orientation != s.orientation) {
1510                disp.orientation = s.orientation;
1511                flags |= eDisplayTransactionNeeded;
1512            }
1513            if (disp.frame != s.frame) {
1514                disp.frame = s.frame;
1515                flags |= eDisplayTransactionNeeded;
1516            }
1517            if (disp.viewport != s.viewport) {
1518                disp.viewport = s.viewport;
1519                flags |= eDisplayTransactionNeeded;
1520            }
1521        }
1522    }
1523    return flags;
1524}
1525
1526uint32_t SurfaceFlinger::setClientStateLocked(
1527        const sp<Client>& client,
1528        const layer_state_t& s)
1529{
1530    uint32_t flags = 0;
1531    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1532    if (layer != 0) {
1533        const uint32_t what = s.what;
1534        if (what & layer_state_t::ePositionChanged) {
1535            if (layer->setPosition(s.x, s.y))
1536                flags |= eTraversalNeeded;
1537        }
1538        if (what & layer_state_t::eLayerChanged) {
1539            // NOTE: index needs to be calculated before we update the state
1540            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1541            if (layer->setLayer(s.z)) {
1542                mCurrentState.layersSortedByZ.removeAt(idx);
1543                mCurrentState.layersSortedByZ.add(layer);
1544                // we need traversal (state changed)
1545                // AND transaction (list changed)
1546                flags |= eTransactionNeeded|eTraversalNeeded;
1547            }
1548        }
1549        if (what & layer_state_t::eSizeChanged) {
1550            if (layer->setSize(s.w, s.h)) {
1551                flags |= eTraversalNeeded;
1552            }
1553        }
1554        if (what & layer_state_t::eAlphaChanged) {
1555            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1556                flags |= eTraversalNeeded;
1557        }
1558        if (what & layer_state_t::eMatrixChanged) {
1559            if (layer->setMatrix(s.matrix))
1560                flags |= eTraversalNeeded;
1561        }
1562        if (what & layer_state_t::eTransparentRegionChanged) {
1563            if (layer->setTransparentRegionHint(s.transparentRegion))
1564                flags |= eTraversalNeeded;
1565        }
1566        if (what & layer_state_t::eVisibilityChanged) {
1567            if (layer->setFlags(s.flags, s.mask))
1568                flags |= eTraversalNeeded;
1569        }
1570        if (what & layer_state_t::eCropChanged) {
1571            if (layer->setCrop(s.crop))
1572                flags |= eTraversalNeeded;
1573        }
1574        if (what & layer_state_t::eLayerStackChanged) {
1575            // NOTE: index needs to be calculated before we update the state
1576            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1577            if (layer->setLayerStack(s.layerStack)) {
1578                mCurrentState.layersSortedByZ.removeAt(idx);
1579                mCurrentState.layersSortedByZ.add(layer);
1580                // we need traversal (state changed)
1581                // AND transaction (list changed)
1582                flags |= eTransactionNeeded|eTraversalNeeded;
1583            }
1584        }
1585    }
1586    return flags;
1587}
1588
1589sp<ISurface> SurfaceFlinger::createLayer(
1590        ISurfaceComposerClient::surface_data_t* params,
1591        const String8& name,
1592        const sp<Client>& client,
1593       uint32_t w, uint32_t h, PixelFormat format,
1594        uint32_t flags)
1595{
1596    sp<LayerBaseClient> layer;
1597    sp<ISurface> surfaceHandle;
1598
1599    if (int32_t(w|h) < 0) {
1600        ALOGE("createLayer() failed, w or h is negative (w=%d, h=%d)",
1601                int(w), int(h));
1602        return surfaceHandle;
1603    }
1604
1605    //ALOGD("createLayer for (%d x %d), name=%s", w, h, name.string());
1606    switch (flags & ISurfaceComposerClient::eFXSurfaceMask) {
1607        case ISurfaceComposerClient::eFXSurfaceNormal:
1608            layer = createNormalLayer(client, w, h, flags, format);
1609            break;
1610        case ISurfaceComposerClient::eFXSurfaceBlur:
1611        case ISurfaceComposerClient::eFXSurfaceDim:
1612            layer = createDimLayer(client, w, h, flags);
1613            break;
1614        case ISurfaceComposerClient::eFXSurfaceScreenshot:
1615            layer = createScreenshotLayer(client, w, h, flags);
1616            break;
1617    }
1618
1619    if (layer != 0) {
1620        layer->initStates(w, h, flags);
1621        layer->setName(name);
1622        ssize_t token = addClientLayer(client, layer);
1623        surfaceHandle = layer->getSurface();
1624        if (surfaceHandle != 0) {
1625            params->token = token;
1626            params->identity = layer->getIdentity();
1627        }
1628        setTransactionFlags(eTransactionNeeded);
1629    }
1630
1631    return surfaceHandle;
1632}
1633
1634sp<Layer> SurfaceFlinger::createNormalLayer(
1635        const sp<Client>& client,
1636        uint32_t w, uint32_t h, uint32_t flags,
1637        PixelFormat& format)
1638{
1639    // initialize the surfaces
1640    switch (format) {
1641    case PIXEL_FORMAT_TRANSPARENT:
1642    case PIXEL_FORMAT_TRANSLUCENT:
1643        format = PIXEL_FORMAT_RGBA_8888;
1644        break;
1645    case PIXEL_FORMAT_OPAQUE:
1646#ifdef NO_RGBX_8888
1647        format = PIXEL_FORMAT_RGB_565;
1648#else
1649        format = PIXEL_FORMAT_RGBX_8888;
1650#endif
1651        break;
1652    }
1653
1654#ifdef NO_RGBX_8888
1655    if (format == PIXEL_FORMAT_RGBX_8888)
1656        format = PIXEL_FORMAT_RGBA_8888;
1657#endif
1658
1659    sp<Layer> layer = new Layer(this, client);
1660    status_t err = layer->setBuffers(w, h, format, flags);
1661    if (CC_LIKELY(err != NO_ERROR)) {
1662        ALOGE("createNormalLayer() failed (%s)", strerror(-err));
1663        layer.clear();
1664    }
1665    return layer;
1666}
1667
1668sp<LayerDim> SurfaceFlinger::createDimLayer(
1669        const sp<Client>& client,
1670        uint32_t w, uint32_t h, uint32_t flags)
1671{
1672    sp<LayerDim> layer = new LayerDim(this, client);
1673    return layer;
1674}
1675
1676sp<LayerScreenshot> SurfaceFlinger::createScreenshotLayer(
1677        const sp<Client>& client,
1678        uint32_t w, uint32_t h, uint32_t flags)
1679{
1680    sp<LayerScreenshot> layer = new LayerScreenshot(this, client);
1681    return layer;
1682}
1683
1684status_t SurfaceFlinger::onLayerRemoved(const sp<Client>& client, SurfaceID sid)
1685{
1686    /*
1687     * called by the window manager, when a surface should be marked for
1688     * destruction.
1689     *
1690     * The surface is removed from the current and drawing lists, but placed
1691     * in the purgatory queue, so it's not destroyed right-away (we need
1692     * to wait for all client's references to go away first).
1693     */
1694
1695    status_t err = NAME_NOT_FOUND;
1696    Mutex::Autolock _l(mStateLock);
1697    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1698
1699    if (layer != 0) {
1700        err = purgatorizeLayer_l(layer);
1701        if (err == NO_ERROR) {
1702            setTransactionFlags(eTransactionNeeded);
1703        }
1704    }
1705    return err;
1706}
1707
1708status_t SurfaceFlinger::onLayerDestroyed(const wp<LayerBaseClient>& layer)
1709{
1710    // called by ~ISurface() when all references are gone
1711    status_t err = NO_ERROR;
1712    sp<LayerBaseClient> l(layer.promote());
1713    if (l != NULL) {
1714        Mutex::Autolock _l(mStateLock);
1715        err = removeLayer_l(l);
1716        if (err == NAME_NOT_FOUND) {
1717            // The surface wasn't in the current list, which means it was
1718            // removed already, which means it is in the purgatory,
1719            // and need to be removed from there.
1720            ssize_t idx = mLayerPurgatory.remove(l);
1721            ALOGE_IF(idx < 0,
1722                    "layer=%p is not in the purgatory list", l.get());
1723        }
1724        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1725                "error removing layer=%p (%s)", l.get(), strerror(-err));
1726    }
1727    return err;
1728}
1729
1730// ---------------------------------------------------------------------------
1731
1732void SurfaceFlinger::onInitializeDisplays() {
1733    // reset screen orientation
1734    Vector<ComposerState> state;
1735    Vector<DisplayState> displays;
1736    DisplayState d;
1737    d.what = DisplayState::eDisplayProjectionChanged;
1738    d.token = mDefaultDisplays[DisplayDevice::DISPLAY_PRIMARY];
1739    d.orientation = DisplayState::eOrientationDefault;
1740    d.frame.makeInvalid();
1741    d.viewport.makeInvalid();
1742    displays.add(d);
1743    setTransactionState(state, displays, 0);
1744
1745    // XXX: this should init default device to "unblank" and all other devices to "blank"
1746    onScreenAcquired();
1747}
1748
1749void SurfaceFlinger::initializeDisplays() {
1750    class MessageScreenInitialized : public MessageBase {
1751        SurfaceFlinger* flinger;
1752    public:
1753        MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
1754        virtual bool handler() {
1755            flinger->onInitializeDisplays();
1756            return true;
1757        }
1758    };
1759    sp<MessageBase> msg = new MessageScreenInitialized(this);
1760    postMessageAsync(msg);  // we may be called from main thread, use async message
1761}
1762
1763
1764void SurfaceFlinger::onScreenAcquired() {
1765    ALOGD("Screen about to return, flinger = %p", this);
1766    sp<const DisplayDevice> hw(getDefaultDisplayDevice()); // XXX: this should be per DisplayDevice
1767    getHwComposer().acquire();
1768    hw->acquireScreen();
1769    mEventThread->onScreenAcquired();
1770    mVisibleRegionsDirty = true;
1771    repaintEverything();
1772}
1773
1774void SurfaceFlinger::onScreenReleased() {
1775    ALOGD("About to give-up screen, flinger = %p", this);
1776    sp<const DisplayDevice> hw(getDefaultDisplayDevice()); // XXX: this should be per DisplayDevice
1777    if (hw->isScreenAcquired()) {
1778        mEventThread->onScreenReleased();
1779        hw->releaseScreen();
1780        getHwComposer().release();
1781        mVisibleRegionsDirty = true;
1782        // from this point on, SF will stop drawing
1783    }
1784}
1785
1786void SurfaceFlinger::unblank() {
1787    class MessageScreenAcquired : public MessageBase {
1788        SurfaceFlinger* flinger;
1789    public:
1790        MessageScreenAcquired(SurfaceFlinger* flinger) : flinger(flinger) { }
1791        virtual bool handler() {
1792            flinger->onScreenAcquired();
1793            return true;
1794        }
1795    };
1796    sp<MessageBase> msg = new MessageScreenAcquired(this);
1797    postMessageSync(msg);
1798}
1799
1800void SurfaceFlinger::blank() {
1801    class MessageScreenReleased : public MessageBase {
1802        SurfaceFlinger* flinger;
1803    public:
1804        MessageScreenReleased(SurfaceFlinger* flinger) : flinger(flinger) { }
1805        virtual bool handler() {
1806            flinger->onScreenReleased();
1807            return true;
1808        }
1809    };
1810    sp<MessageBase> msg = new MessageScreenReleased(this);
1811    postMessageSync(msg);
1812}
1813
1814// ---------------------------------------------------------------------------
1815
1816status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1817{
1818    const size_t SIZE = 4096;
1819    char buffer[SIZE];
1820    String8 result;
1821
1822    if (!PermissionCache::checkCallingPermission(sDump)) {
1823        snprintf(buffer, SIZE, "Permission Denial: "
1824                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1825                IPCThreadState::self()->getCallingPid(),
1826                IPCThreadState::self()->getCallingUid());
1827        result.append(buffer);
1828    } else {
1829        // Try to get the main lock, but don't insist if we can't
1830        // (this would indicate SF is stuck, but we want to be able to
1831        // print something in dumpsys).
1832        int retry = 3;
1833        while (mStateLock.tryLock()<0 && --retry>=0) {
1834            usleep(1000000);
1835        }
1836        const bool locked(retry >= 0);
1837        if (!locked) {
1838            snprintf(buffer, SIZE,
1839                    "SurfaceFlinger appears to be unresponsive, "
1840                    "dumping anyways (no locks held)\n");
1841            result.append(buffer);
1842        }
1843
1844        bool dumpAll = true;
1845        size_t index = 0;
1846        size_t numArgs = args.size();
1847        if (numArgs) {
1848            if ((index < numArgs) &&
1849                    (args[index] == String16("--list"))) {
1850                index++;
1851                listLayersLocked(args, index, result, buffer, SIZE);
1852                dumpAll = false;
1853            }
1854
1855            if ((index < numArgs) &&
1856                    (args[index] == String16("--latency"))) {
1857                index++;
1858                dumpStatsLocked(args, index, result, buffer, SIZE);
1859                dumpAll = false;
1860            }
1861
1862            if ((index < numArgs) &&
1863                    (args[index] == String16("--latency-clear"))) {
1864                index++;
1865                clearStatsLocked(args, index, result, buffer, SIZE);
1866                dumpAll = false;
1867            }
1868        }
1869
1870        if (dumpAll) {
1871            dumpAllLocked(result, buffer, SIZE);
1872        }
1873
1874        if (locked) {
1875            mStateLock.unlock();
1876        }
1877    }
1878    write(fd, result.string(), result.size());
1879    return NO_ERROR;
1880}
1881
1882void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1883        String8& result, char* buffer, size_t SIZE) const
1884{
1885    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1886    const size_t count = currentLayers.size();
1887    for (size_t i=0 ; i<count ; i++) {
1888        const sp<LayerBase>& layer(currentLayers[i]);
1889        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1890        result.append(buffer);
1891    }
1892}
1893
1894void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1895        String8& result, char* buffer, size_t SIZE) const
1896{
1897    String8 name;
1898    if (index < args.size()) {
1899        name = String8(args[index]);
1900        index++;
1901    }
1902
1903    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1904    const size_t count = currentLayers.size();
1905    for (size_t i=0 ; i<count ; i++) {
1906        const sp<LayerBase>& layer(currentLayers[i]);
1907        if (name.isEmpty()) {
1908            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1909            result.append(buffer);
1910        }
1911        if (name.isEmpty() || (name == layer->getName())) {
1912            layer->dumpStats(result, buffer, SIZE);
1913        }
1914    }
1915}
1916
1917void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1918        String8& result, char* buffer, size_t SIZE) const
1919{
1920    String8 name;
1921    if (index < args.size()) {
1922        name = String8(args[index]);
1923        index++;
1924    }
1925
1926    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1927    const size_t count = currentLayers.size();
1928    for (size_t i=0 ; i<count ; i++) {
1929        const sp<LayerBase>& layer(currentLayers[i]);
1930        if (name.isEmpty() || (name == layer->getName())) {
1931            layer->clearStats();
1932        }
1933    }
1934}
1935
1936void SurfaceFlinger::dumpAllLocked(
1937        String8& result, char* buffer, size_t SIZE) const
1938{
1939    // figure out if we're stuck somewhere
1940    const nsecs_t now = systemTime();
1941    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1942    const nsecs_t inTransaction(mDebugInTransaction);
1943    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1944    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1945
1946    /*
1947     * Dump the visible layer list
1948     */
1949    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1950    const size_t count = currentLayers.size();
1951    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1952    result.append(buffer);
1953    for (size_t i=0 ; i<count ; i++) {
1954        const sp<LayerBase>& layer(currentLayers[i]);
1955        layer->dump(result, buffer, SIZE);
1956    }
1957
1958    /*
1959     * Dump the layers in the purgatory
1960     */
1961
1962    const size_t purgatorySize = mLayerPurgatory.size();
1963    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1964    result.append(buffer);
1965    for (size_t i=0 ; i<purgatorySize ; i++) {
1966        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1967        layer->shortDump(result, buffer, SIZE);
1968    }
1969
1970    /*
1971     * Dump Display state
1972     */
1973
1974    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
1975        const sp<const DisplayDevice>& hw(mDisplays[dpy]);
1976        snprintf(buffer, SIZE,
1977                "+ DisplayDevice[%u]\n"
1978                "   type=%x, layerStack=%u, (%4dx%4d), orient=%2d (type=%08x), "
1979                "flips=%u, secure=%d, numLayers=%u, v:[%d,%d,%d,%d], f:[%d,%d,%d,%d], "
1980                "transform:[[%0.3f,%0.3f,%0.3f][%0.3f,%0.3f,%0.3f][%0.3f,%0.3f,%0.3f]]\n",
1981                dpy,
1982                hw->getDisplayType(), hw->getLayerStack(),
1983                hw->getWidth(), hw->getHeight(),
1984                hw->getOrientation(), hw->getTransform().getType(),
1985                hw->getPageFlipCount(),
1986                hw->getSecureLayerVisible(),
1987                hw->getVisibleLayersSortedByZ().size(),
1988                hw->getViewport().left, hw->getViewport().top, hw->getViewport().right, hw->getViewport().bottom,
1989                hw->getFrame().left, hw->getFrame().top, hw->getFrame().right, hw->getFrame().bottom,
1990                hw->getTransform()[0][0], hw->getTransform()[1][0], hw->getTransform()[2][0],
1991                hw->getTransform()[0][1], hw->getTransform()[1][1], hw->getTransform()[2][1],
1992                hw->getTransform()[0][2], hw->getTransform()[1][2], hw->getTransform()[2][2]);
1993
1994        result.append(buffer);
1995    }
1996
1997    /*
1998     * Dump SurfaceFlinger global state
1999     */
2000
2001    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
2002    result.append(buffer);
2003
2004    HWComposer& hwc(getHwComposer());
2005    sp<const DisplayDevice> hw(getDefaultDisplayDevice());
2006    const GLExtensions& extensions(GLExtensions::getInstance());
2007    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
2008            extensions.getVendor(),
2009            extensions.getRenderer(),
2010            extensions.getVersion());
2011    result.append(buffer);
2012
2013    snprintf(buffer, SIZE, "EGL : %s\n",
2014            eglQueryString(mEGLDisplay, EGL_VERSION_HW_ANDROID));
2015    result.append(buffer);
2016
2017    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
2018    result.append(buffer);
2019
2020    hw->undefinedRegion.dump(result, "undefinedRegion");
2021    snprintf(buffer, SIZE,
2022            "  orientation=%d, canDraw=%d\n",
2023            hw->getOrientation(), hw->canDraw());
2024    result.append(buffer);
2025    snprintf(buffer, SIZE,
2026            "  last eglSwapBuffers() time: %f us\n"
2027            "  last transaction time     : %f us\n"
2028            "  transaction-flags         : %08x\n"
2029            "  refresh-rate              : %f fps\n"
2030            "  x-dpi                     : %f\n"
2031            "  y-dpi                     : %f\n",
2032            mLastSwapBufferTime/1000.0,
2033            mLastTransactionTime/1000.0,
2034            mTransactionFlags,
2035            1e9 / hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY),
2036            hwc.getDpiX(HWC_DISPLAY_PRIMARY),
2037            hwc.getDpiY(HWC_DISPLAY_PRIMARY));
2038    result.append(buffer);
2039
2040    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
2041            inSwapBuffersDuration/1000.0);
2042    result.append(buffer);
2043
2044    snprintf(buffer, SIZE, "  transaction time: %f us\n",
2045            inTransactionDuration/1000.0);
2046    result.append(buffer);
2047
2048    /*
2049     * VSYNC state
2050     */
2051    mEventThread->dump(result, buffer, SIZE);
2052
2053    /*
2054     * Dump HWComposer state
2055     */
2056    snprintf(buffer, SIZE, "h/w composer state:\n");
2057    result.append(buffer);
2058    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
2059            hwc.initCheck()==NO_ERROR ? "present" : "not present",
2060                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
2061    result.append(buffer);
2062    hwc.dump(result, buffer, SIZE, hw->getVisibleLayersSortedByZ());
2063
2064    /*
2065     * Dump gralloc state
2066     */
2067    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
2068    alloc.dump(result);
2069    hw->dump(result);
2070}
2071
2072bool SurfaceFlinger::startDdmConnection()
2073{
2074    void* libddmconnection_dso =
2075            dlopen("libsurfaceflinger_ddmconnection.so", RTLD_NOW);
2076    if (!libddmconnection_dso) {
2077        return false;
2078    }
2079    void (*DdmConnection_start)(const char* name);
2080    DdmConnection_start =
2081            (typeof DdmConnection_start)dlsym(libddmconnection_dso, "DdmConnection_start");
2082    if (!DdmConnection_start) {
2083        dlclose(libddmconnection_dso);
2084        return false;
2085    }
2086    (*DdmConnection_start)(getServiceName());
2087    return true;
2088}
2089
2090status_t SurfaceFlinger::onTransact(
2091    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2092{
2093    switch (code) {
2094        case CREATE_CONNECTION:
2095        case SET_TRANSACTION_STATE:
2096        case BOOT_FINISHED:
2097        case BLANK:
2098        case UNBLANK:
2099        {
2100            // codes that require permission check
2101            IPCThreadState* ipc = IPCThreadState::self();
2102            const int pid = ipc->getCallingPid();
2103            const int uid = ipc->getCallingUid();
2104            if ((uid != AID_GRAPHICS) &&
2105                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
2106                ALOGE("Permission Denial: "
2107                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
2108                return PERMISSION_DENIED;
2109            }
2110            break;
2111        }
2112        case CAPTURE_SCREEN:
2113        {
2114            // codes that require permission check
2115            IPCThreadState* ipc = IPCThreadState::self();
2116            const int pid = ipc->getCallingPid();
2117            const int uid = ipc->getCallingUid();
2118            if ((uid != AID_GRAPHICS) &&
2119                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
2120                ALOGE("Permission Denial: "
2121                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
2122                return PERMISSION_DENIED;
2123            }
2124            break;
2125        }
2126    }
2127
2128    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
2129    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
2130        CHECK_INTERFACE(ISurfaceComposer, data, reply);
2131        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
2132            IPCThreadState* ipc = IPCThreadState::self();
2133            const int pid = ipc->getCallingPid();
2134            const int uid = ipc->getCallingUid();
2135            ALOGE("Permission Denial: "
2136                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
2137            return PERMISSION_DENIED;
2138        }
2139        int n;
2140        switch (code) {
2141            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
2142            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
2143                return NO_ERROR;
2144            case 1002:  // SHOW_UPDATES
2145                n = data.readInt32();
2146                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
2147                invalidateHwcGeometry();
2148                repaintEverything();
2149                return NO_ERROR;
2150            case 1004:{ // repaint everything
2151                repaintEverything();
2152                return NO_ERROR;
2153            }
2154            case 1005:{ // force transaction
2155                setTransactionFlags(
2156                        eTransactionNeeded|
2157                        eDisplayTransactionNeeded|
2158                        eTraversalNeeded);
2159                return NO_ERROR;
2160            }
2161            case 1006:{ // send empty update
2162                signalRefresh();
2163                return NO_ERROR;
2164            }
2165            case 1008:  // toggle use of hw composer
2166                n = data.readInt32();
2167                mDebugDisableHWC = n ? 1 : 0;
2168                invalidateHwcGeometry();
2169                repaintEverything();
2170                return NO_ERROR;
2171            case 1009:  // toggle use of transform hint
2172                n = data.readInt32();
2173                mDebugDisableTransformHint = n ? 1 : 0;
2174                invalidateHwcGeometry();
2175                repaintEverything();
2176                return NO_ERROR;
2177            case 1010:  // interrogate.
2178                reply->writeInt32(0);
2179                reply->writeInt32(0);
2180                reply->writeInt32(mDebugRegion);
2181                reply->writeInt32(0);
2182                reply->writeInt32(mDebugDisableHWC);
2183                return NO_ERROR;
2184            case 1013: {
2185                Mutex::Autolock _l(mStateLock);
2186                sp<const DisplayDevice> hw(getDefaultDisplayDevice());
2187                reply->writeInt32(hw->getPageFlipCount());
2188            }
2189            return NO_ERROR;
2190        }
2191    }
2192    return err;
2193}
2194
2195void SurfaceFlinger::repaintEverything() {
2196    android_atomic_or(1, &mRepaintEverything);
2197    signalTransaction();
2198}
2199
2200// ---------------------------------------------------------------------------
2201
2202status_t SurfaceFlinger::renderScreenToTexture(uint32_t layerStack,
2203        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
2204{
2205    Mutex::Autolock _l(mStateLock);
2206    return renderScreenToTextureLocked(layerStack, textureName, uOut, vOut);
2207}
2208
2209status_t SurfaceFlinger::renderScreenToTextureLocked(uint32_t layerStack,
2210        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
2211{
2212    ATRACE_CALL();
2213
2214    if (!GLExtensions::getInstance().haveFramebufferObject())
2215        return INVALID_OPERATION;
2216
2217    // get screen geometry
2218    // FIXME: figure out what it means to have a screenshot texture w/ multi-display
2219    sp<const DisplayDevice> hw(getDefaultDisplayDevice());
2220    const uint32_t hw_w = hw->getWidth();
2221    const uint32_t hw_h = hw->getHeight();
2222    GLfloat u = 1;
2223    GLfloat v = 1;
2224
2225    // make sure to clear all GL error flags
2226    while ( glGetError() != GL_NO_ERROR ) ;
2227
2228    // create a FBO
2229    GLuint name, tname;
2230    glGenTextures(1, &tname);
2231    glBindTexture(GL_TEXTURE_2D, tname);
2232    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2233    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2234    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
2235            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
2236    if (glGetError() != GL_NO_ERROR) {
2237        while ( glGetError() != GL_NO_ERROR ) ;
2238        GLint tw = (2 << (31 - clz(hw_w)));
2239        GLint th = (2 << (31 - clz(hw_h)));
2240        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
2241                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
2242        u = GLfloat(hw_w) / tw;
2243        v = GLfloat(hw_h) / th;
2244    }
2245    glGenFramebuffersOES(1, &name);
2246    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2247    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
2248            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
2249
2250    // redraw the screen entirely...
2251    glDisable(GL_TEXTURE_EXTERNAL_OES);
2252    glDisable(GL_TEXTURE_2D);
2253    glClearColor(0,0,0,1);
2254    glClear(GL_COLOR_BUFFER_BIT);
2255    glMatrixMode(GL_MODELVIEW);
2256    glLoadIdentity();
2257    const Vector< sp<LayerBase> >& layers(hw->getVisibleLayersSortedByZ());
2258    const size_t count = layers.size();
2259    for (size_t i=0 ; i<count ; ++i) {
2260        const sp<LayerBase>& layer(layers[i]);
2261        layer->draw(hw);
2262    }
2263
2264    hw->compositionComplete();
2265
2266    // back to main framebuffer
2267    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2268    glDeleteFramebuffersOES(1, &name);
2269
2270    *textureName = tname;
2271    *uOut = u;
2272    *vOut = v;
2273    return NO_ERROR;
2274}
2275
2276// ---------------------------------------------------------------------------
2277
2278status_t SurfaceFlinger::captureScreenImplLocked(const sp<IBinder>& display,
2279        sp<IMemoryHeap>* heap,
2280        uint32_t* w, uint32_t* h, PixelFormat* f,
2281        uint32_t sw, uint32_t sh,
2282        uint32_t minLayerZ, uint32_t maxLayerZ)
2283{
2284    ATRACE_CALL();
2285
2286    status_t result = PERMISSION_DENIED;
2287
2288    if (!GLExtensions::getInstance().haveFramebufferObject()) {
2289        return INVALID_OPERATION;
2290    }
2291
2292    // get screen geometry
2293    sp<const DisplayDevice> hw(getDisplayDevice(display));
2294    const uint32_t hw_w = hw->getWidth();
2295    const uint32_t hw_h = hw->getHeight();
2296
2297    // if we have secure windows on this display, never allow the screen capture
2298    if (hw->getSecureLayerVisible()) {
2299        ALOGW("FB is protected: PERMISSION_DENIED");
2300        return PERMISSION_DENIED;
2301    }
2302
2303    if ((sw > hw_w) || (sh > hw_h)) {
2304        ALOGE("size mismatch (%d, %d) > (%d, %d)", sw, sh, hw_w, hw_h);
2305        return BAD_VALUE;
2306    }
2307
2308    sw = (!sw) ? hw_w : sw;
2309    sh = (!sh) ? hw_h : sh;
2310    const size_t size = sw * sh * 4;
2311    const bool filtering = sw != hw_w || sh != hw_h;
2312
2313//    ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2314//            sw, sh, minLayerZ, maxLayerZ);
2315
2316    // make sure to clear all GL error flags
2317    while ( glGetError() != GL_NO_ERROR ) ;
2318
2319    // create a FBO
2320    GLuint name, tname;
2321    glGenRenderbuffersOES(1, &tname);
2322    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2323    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2324
2325    glGenFramebuffersOES(1, &name);
2326    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2327    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2328            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2329
2330    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2331
2332    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2333
2334        // invert everything, b/c glReadPixel() below will invert the FB
2335        glViewport(0, 0, sw, sh);
2336        glMatrixMode(GL_PROJECTION);
2337        glPushMatrix();
2338        glLoadIdentity();
2339        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2340        glMatrixMode(GL_MODELVIEW);
2341
2342        // redraw the screen entirely...
2343        glClearColor(0,0,0,1);
2344        glClear(GL_COLOR_BUFFER_BIT);
2345
2346        const Vector< sp<LayerBase> >& layers(hw->getVisibleLayersSortedByZ());
2347        const size_t count = layers.size();
2348        for (size_t i=0 ; i<count ; ++i) {
2349            const sp<LayerBase>& layer(layers[i]);
2350            const uint32_t z = layer->drawingState().z;
2351            if (z >= minLayerZ && z <= maxLayerZ) {
2352                if (filtering) layer->setFiltering(true);
2353                layer->draw(hw);
2354                if (filtering) layer->setFiltering(false);
2355            }
2356        }
2357
2358        // check for errors and return screen capture
2359        if (glGetError() != GL_NO_ERROR) {
2360            // error while rendering
2361            result = INVALID_OPERATION;
2362        } else {
2363            // allocate shared memory large enough to hold the
2364            // screen capture
2365            sp<MemoryHeapBase> base(
2366                    new MemoryHeapBase(size, 0, "screen-capture") );
2367            void* const ptr = base->getBase();
2368            if (ptr) {
2369                // capture the screen with glReadPixels()
2370                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2371                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2372                if (glGetError() == GL_NO_ERROR) {
2373                    *heap = base;
2374                    *w = sw;
2375                    *h = sh;
2376                    *f = PIXEL_FORMAT_RGBA_8888;
2377                    result = NO_ERROR;
2378                }
2379            } else {
2380                result = NO_MEMORY;
2381            }
2382        }
2383        glViewport(0, 0, hw_w, hw_h);
2384        glMatrixMode(GL_PROJECTION);
2385        glPopMatrix();
2386        glMatrixMode(GL_MODELVIEW);
2387    } else {
2388        result = BAD_VALUE;
2389    }
2390
2391    // release FBO resources
2392    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2393    glDeleteRenderbuffersOES(1, &tname);
2394    glDeleteFramebuffersOES(1, &name);
2395
2396    hw->compositionComplete();
2397
2398//    ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2399
2400    return result;
2401}
2402
2403
2404status_t SurfaceFlinger::captureScreen(const sp<IBinder>& display,
2405        sp<IMemoryHeap>* heap,
2406        uint32_t* width, uint32_t* height, PixelFormat* format,
2407        uint32_t sw, uint32_t sh,
2408        uint32_t minLayerZ, uint32_t maxLayerZ)
2409{
2410    if (CC_UNLIKELY(display == 0))
2411        return BAD_VALUE;
2412
2413    if (!GLExtensions::getInstance().haveFramebufferObject())
2414        return INVALID_OPERATION;
2415
2416    class MessageCaptureScreen : public MessageBase {
2417        SurfaceFlinger* flinger;
2418        sp<IBinder> display;
2419        sp<IMemoryHeap>* heap;
2420        uint32_t* w;
2421        uint32_t* h;
2422        PixelFormat* f;
2423        uint32_t sw;
2424        uint32_t sh;
2425        uint32_t minLayerZ;
2426        uint32_t maxLayerZ;
2427        status_t result;
2428    public:
2429        MessageCaptureScreen(SurfaceFlinger* flinger, const sp<IBinder>& display,
2430                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2431                uint32_t sw, uint32_t sh,
2432                uint32_t minLayerZ, uint32_t maxLayerZ)
2433            : flinger(flinger), display(display),
2434              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2435              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2436              result(PERMISSION_DENIED)
2437        {
2438        }
2439        status_t getResult() const {
2440            return result;
2441        }
2442        virtual bool handler() {
2443            Mutex::Autolock _l(flinger->mStateLock);
2444            result = flinger->captureScreenImplLocked(display,
2445                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2446            return true;
2447        }
2448    };
2449
2450    sp<MessageBase> msg = new MessageCaptureScreen(this,
2451            display, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2452    status_t res = postMessageSync(msg);
2453    if (res == NO_ERROR) {
2454        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2455    }
2456    return res;
2457}
2458
2459// ---------------------------------------------------------------------------
2460
2461SurfaceFlinger::LayerVector::LayerVector() {
2462}
2463
2464SurfaceFlinger::LayerVector::LayerVector(const LayerVector& rhs)
2465    : SortedVector<sp<LayerBase> >(rhs) {
2466}
2467
2468int SurfaceFlinger::LayerVector::do_compare(const void* lhs,
2469    const void* rhs) const
2470{
2471    // sort layers per layer-stack, then by z-order and finally by sequence
2472    const sp<LayerBase>& l(*reinterpret_cast<const sp<LayerBase>*>(lhs));
2473    const sp<LayerBase>& r(*reinterpret_cast<const sp<LayerBase>*>(rhs));
2474
2475    uint32_t ls = l->currentState().layerStack;
2476    uint32_t rs = r->currentState().layerStack;
2477    if (ls != rs)
2478        return ls - rs;
2479
2480    uint32_t lz = l->currentState().z;
2481    uint32_t rz = r->currentState().z;
2482    if (lz != rz)
2483        return lz - rz;
2484
2485    return l->sequence - r->sequence;
2486}
2487
2488// ---------------------------------------------------------------------------
2489
2490SurfaceFlinger::DisplayDeviceState::DisplayDeviceState()
2491    : type(DisplayDevice::DISPLAY_ID_INVALID) {
2492}
2493
2494SurfaceFlinger::DisplayDeviceState::DisplayDeviceState(DisplayDevice::DisplayType type)
2495    : type(type), layerStack(0), orientation(0) {
2496    viewport.makeInvalid();
2497    frame.makeInvalid();
2498}
2499
2500// ---------------------------------------------------------------------------
2501
2502GraphicBufferAlloc::GraphicBufferAlloc() {}
2503
2504GraphicBufferAlloc::~GraphicBufferAlloc() {}
2505
2506sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2507        PixelFormat format, uint32_t usage, status_t* error) {
2508    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2509    status_t err = graphicBuffer->initCheck();
2510    *error = err;
2511    if (err != 0 || graphicBuffer->handle == 0) {
2512        if (err == NO_MEMORY) {
2513            GraphicBuffer::dumpAllocationsToSystemLog();
2514        }
2515        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2516             "failed (%s), handle=%p",
2517                w, h, strerror(-err), graphicBuffer->handle);
2518        return 0;
2519    }
2520    return graphicBuffer;
2521}
2522
2523// ---------------------------------------------------------------------------
2524
2525}; // namespace android
2526