SurfaceFlinger.cpp revision 20128300e0cb7f459a60cfbcddb48190ce6545ed 
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
24#include <EGL/egl.h>
25#include <GLES/gl.h>
26
27#include <cutils/log.h>
28#include <cutils/properties.h>
29
30#include <binder/IPCThreadState.h>
31#include <binder/IServiceManager.h>
32#include <binder/MemoryHeapBase.h>
33#include <binder/PermissionCache.h>
34
35#include <ui/DisplayInfo.h>
36
37#include <gui/BitTube.h>
38#include <gui/BufferQueue.h>
39#include <gui/IDisplayEventConnection.h>
40#include <gui/SurfaceTextureClient.h>
41
42#include <ui/GraphicBufferAllocator.h>
43#include <ui/PixelFormat.h>
44
45#include <utils/String8.h>
46#include <utils/String16.h>
47#include <utils/StopWatch.h>
48#include <utils/Trace.h>
49
50#include <private/android_filesystem_config.h>
51
52#include "clz.h"
53#include "DdmConnection.h"
54#include "DisplayDevice.h"
55#include "Client.h"
56#include "EventThread.h"
57#include "GLExtensions.h"
58#include "Layer.h"
59#include "LayerDim.h"
60#include "LayerScreenshot.h"
61#include "SurfaceFlinger.h"
62
63#include "DisplayHardware/FramebufferSurface.h"
64#include "DisplayHardware/HWComposer.h"
65
66
67#define EGL_VERSION_HW_ANDROID  0x3143
68
69#define DISPLAY_COUNT       1
70
71namespace android {
72// ---------------------------------------------------------------------------
73
74const String16 sHardwareTest("android.permission.HARDWARE_TEST");
75const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
76const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
77const String16 sDump("android.permission.DUMP");
78
79// ---------------------------------------------------------------------------
80
81SurfaceFlinger::SurfaceFlinger()
82    :   BnSurfaceComposer(), Thread(false),
83        mTransactionFlags(0),
84        mTransationPending(false),
85        mLayersRemoved(false),
86        mRepaintEverything(0),
87        mBootTime(systemTime()),
88        mVisibleRegionsDirty(false),
89        mHwWorkListDirty(false),
90        mDebugRegion(0),
91        mDebugDDMS(0),
92        mDebugDisableHWC(0),
93        mDebugDisableTransformHint(0),
94        mDebugInSwapBuffers(0),
95        mLastSwapBufferTime(0),
96        mDebugInTransaction(0),
97        mLastTransactionTime(0),
98        mBootFinished(false),
99        mExternalDisplaySurface(EGL_NO_SURFACE)
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        DdmConnection::start(getServiceName());
113    }
114
115    ALOGI_IF(mDebugRegion, "showupdates enabled");
116    ALOGI_IF(mDebugDDMS, "DDMS debugging enabled");
117}
118
119void SurfaceFlinger::onFirstRef()
120{
121    mEventQueue.init(this);
122
123    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
124
125    // Wait for the main thread to be done with its initialization
126    mReadyToRunBarrier.wait();
127}
128
129
130SurfaceFlinger::~SurfaceFlinger()
131{
132    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
133    eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
134    eglTerminate(display);
135}
136
137void SurfaceFlinger::binderDied(const wp<IBinder>& who)
138{
139    // the window manager died on us. prepare its eulogy.
140
141    // reset screen orientation
142    Vector<ComposerState> state;
143    Vector<DisplayState> displays;
144    DisplayState d;
145    d.orientation = DisplayState::eOrientationDefault;
146    displays.add(d);
147    setTransactionState(state, displays, 0);
148
149    // restart the boot-animation
150    startBootAnim();
151}
152
153sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
154{
155    sp<ISurfaceComposerClient> bclient;
156    sp<Client> client(new Client(this));
157    status_t err = client->initCheck();
158    if (err == NO_ERROR) {
159        bclient = client;
160    }
161    return bclient;
162}
163
164sp<IBinder> SurfaceFlinger::createDisplay()
165{
166    class DisplayToken : public BBinder {
167        sp<SurfaceFlinger> flinger;
168        virtual ~DisplayToken() {
169             // no more references, this display must be terminated
170             Mutex::Autolock _l(flinger->mStateLock);
171             flinger->mCurrentState.displays.removeItem(this);
172             flinger->setTransactionFlags(eDisplayTransactionNeeded);
173         }
174     public:
175        DisplayToken(const sp<SurfaceFlinger>& flinger)
176            : flinger(flinger) {
177        }
178    };
179
180    sp<BBinder> token = new DisplayToken(this);
181
182    Mutex::Autolock _l(mStateLock);
183    DisplayDeviceState info(intptr_t(token.get())); // FIXME: we shouldn't use the address for the id
184    mCurrentState.displays.add(token, info);
185
186    return token;
187}
188
189sp<IBinder> SurfaceFlinger::getBuiltInDisplay(int32_t id) {
190    if (uint32_t(id) >= DisplayDevice::DISPLAY_ID_COUNT) {
191        ALOGE("getDefaultDisplay: id=%d is not a valid default display id", id);
192        return NULL;
193    }
194    return mDefaultDisplays[id];
195}
196
197sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
198{
199    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
200    return gba;
201}
202
203void SurfaceFlinger::bootFinished()
204{
205    const nsecs_t now = systemTime();
206    const nsecs_t duration = now - mBootTime;
207    ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
208    mBootFinished = true;
209
210    // wait patiently for the window manager death
211    const String16 name("window");
212    sp<IBinder> window(defaultServiceManager()->getService(name));
213    if (window != 0) {
214        window->linkToDeath(static_cast<IBinder::DeathRecipient*>(this));
215    }
216
217    // stop boot animation
218    // formerly we would just kill the process, but we now ask it to exit so it
219    // can choose where to stop the animation.
220    property_set("service.bootanim.exit", "1");
221}
222
223void SurfaceFlinger::deleteTextureAsync(GLuint texture) {
224    class MessageDestroyGLTexture : public MessageBase {
225        GLuint texture;
226    public:
227        MessageDestroyGLTexture(GLuint texture)
228            : texture(texture) {
229        }
230        virtual bool handler() {
231            glDeleteTextures(1, &texture);
232            return true;
233        }
234    };
235    postMessageAsync(new MessageDestroyGLTexture(texture));
236}
237
238status_t SurfaceFlinger::selectConfigForPixelFormat(
239        EGLDisplay dpy,
240        EGLint const* attrs,
241        PixelFormat format,
242        EGLConfig* outConfig)
243{
244    EGLConfig config = NULL;
245    EGLint numConfigs = -1, n=0;
246    eglGetConfigs(dpy, NULL, 0, &numConfigs);
247    EGLConfig* const configs = new EGLConfig[numConfigs];
248    eglChooseConfig(dpy, attrs, configs, numConfigs, &n);
249    for (int i=0 ; i<n ; i++) {
250        EGLint nativeVisualId = 0;
251        eglGetConfigAttrib(dpy, configs[i], EGL_NATIVE_VISUAL_ID, &nativeVisualId);
252        if (nativeVisualId>0 && format == nativeVisualId) {
253            *outConfig = configs[i];
254            delete [] configs;
255            return NO_ERROR;
256        }
257    }
258    delete [] configs;
259    return NAME_NOT_FOUND;
260}
261
262EGLConfig SurfaceFlinger::selectEGLConfig(EGLDisplay display, EGLint nativeVisualId) {
263    // select our EGLConfig. It must support EGL_RECORDABLE_ANDROID if
264    // it is to be used with WIFI displays
265    EGLConfig config;
266    EGLint dummy;
267    status_t err;
268    EGLint attribs[] = {
269            EGL_SURFACE_TYPE,           EGL_WINDOW_BIT,
270            EGL_RECORDABLE_ANDROID,     EGL_TRUE,
271            EGL_NONE
272    };
273    err = selectConfigForPixelFormat(display, attribs, nativeVisualId, &config);
274    if (err) {
275        // maybe we failed because of EGL_RECORDABLE_ANDROID
276        ALOGW("couldn't find an EGLConfig with EGL_RECORDABLE_ANDROID");
277        attribs[2] = EGL_NONE;
278        err = selectConfigForPixelFormat(display, attribs, nativeVisualId, &config);
279    }
280    ALOGE_IF(err, "couldn't find an EGLConfig matching the screen format");
281    if (eglGetConfigAttrib(display, config, EGL_CONFIG_CAVEAT, &dummy) == EGL_TRUE) {
282        ALOGW_IF(dummy == EGL_SLOW_CONFIG, "EGL_SLOW_CONFIG selected!");
283    }
284    return config;
285}
286
287EGLContext SurfaceFlinger::createGLContext(EGLDisplay display, EGLConfig config) {
288    // Also create our EGLContext
289    EGLint contextAttributes[] = {
290#ifdef EGL_IMG_context_priority
291#ifdef HAS_CONTEXT_PRIORITY
292#warning "using EGL_IMG_context_priority"
293            EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_HIGH_IMG,
294#endif
295#endif
296            EGL_NONE, EGL_NONE
297    };
298    EGLContext ctxt = eglCreateContext(display, config, NULL, contextAttributes);
299    ALOGE_IF(ctxt==EGL_NO_CONTEXT, "EGLContext creation failed");
300    return ctxt;
301}
302
303void SurfaceFlinger::initializeGL(EGLDisplay display, EGLSurface surface) {
304    EGLBoolean result = eglMakeCurrent(display, surface, surface, mEGLContext);
305    if (!result) {
306        ALOGE("Couldn't create a working GLES context. check logs. exiting...");
307        exit(0);
308    }
309
310    GLExtensions& extensions(GLExtensions::getInstance());
311    extensions.initWithGLStrings(
312            glGetString(GL_VENDOR),
313            glGetString(GL_RENDERER),
314            glGetString(GL_VERSION),
315            glGetString(GL_EXTENSIONS),
316            eglQueryString(display, EGL_VENDOR),
317            eglQueryString(display, EGL_VERSION),
318            eglQueryString(display, EGL_EXTENSIONS));
319
320    EGLint w, h;
321    eglQuerySurface(display, surface, EGL_WIDTH,  &w);
322    eglQuerySurface(display, surface, EGL_HEIGHT, &h);
323
324    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
325    glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims);
326
327    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
328    glPixelStorei(GL_PACK_ALIGNMENT, 4);
329    glEnableClientState(GL_VERTEX_ARRAY);
330    glShadeModel(GL_FLAT);
331    glDisable(GL_DITHER);
332    glDisable(GL_CULL_FACE);
333
334    struct pack565 {
335        inline uint16_t operator() (int r, int g, int b) const {
336            return (r<<11)|(g<<5)|b;
337        }
338    } pack565;
339
340    const uint16_t protTexData[] = { pack565(0x03, 0x03, 0x03) };
341    glGenTextures(1, &mProtectedTexName);
342    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
343    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
344    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
345    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
346    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
347    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
348            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
349
350    glViewport(0, 0, w, h);
351    glMatrixMode(GL_PROJECTION);
352    glLoadIdentity();
353    // put the origin in the left-bottom corner
354    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
355
356    // print some debugging info
357    EGLint r,g,b,a;
358    eglGetConfigAttrib(display, mEGLConfig, EGL_RED_SIZE,   &r);
359    eglGetConfigAttrib(display, mEGLConfig, EGL_GREEN_SIZE, &g);
360    eglGetConfigAttrib(display, mEGLConfig, EGL_BLUE_SIZE,  &b);
361    eglGetConfigAttrib(display, mEGLConfig, EGL_ALPHA_SIZE, &a);
362    ALOGI("EGL informations:");
363    ALOGI("vendor    : %s", extensions.getEglVendor());
364    ALOGI("version   : %s", extensions.getEglVersion());
365    ALOGI("extensions: %s", extensions.getEglExtension());
366    ALOGI("Client API: %s", eglQueryString(display, EGL_CLIENT_APIS)?:"Not Supported");
367    ALOGI("EGLSurface: %d-%d-%d-%d, config=%p", r, g, b, a, mEGLConfig);
368    ALOGI("OpenGL ES informations:");
369    ALOGI("vendor    : %s", extensions.getVendor());
370    ALOGI("renderer  : %s", extensions.getRenderer());
371    ALOGI("version   : %s", extensions.getVersion());
372    ALOGI("extensions: %s", extensions.getExtension());
373    ALOGI("GL_MAX_TEXTURE_SIZE = %d", mMaxTextureSize);
374    ALOGI("GL_MAX_VIEWPORT_DIMS = %d x %d", mMaxViewportDims[0], mMaxViewportDims[1]);
375}
376
377status_t SurfaceFlinger::readyToRun()
378{
379    ALOGI(  "SurfaceFlinger's main thread ready to run. "
380            "Initializing graphics H/W...");
381
382    // initialize EGL
383    mEGLDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
384    eglInitialize(mEGLDisplay, NULL, NULL);
385
386    // Initialize the main display
387    // create native window to main display
388    sp<FramebufferSurface> fbs = FramebufferSurface::create();
389    if (fbs == NULL) {
390        ALOGE("Display subsystem failed to initialize. check logs. exiting...");
391        exit(0);
392    }
393
394    sp<SurfaceTextureClient> stc(new SurfaceTextureClient(
395            static_cast<sp<ISurfaceTexture> >(fbs->getBufferQueue())));
396
397    // initialize the config and context
398    int format;
399    ANativeWindow* const anw = stc.get();
400    anw->query(anw, NATIVE_WINDOW_FORMAT, &format);
401    mEGLConfig  = selectEGLConfig(mEGLDisplay, format);
402    mEGLContext = createGLContext(mEGLDisplay, mEGLConfig);
403
404    // initialize our main display hardware
405
406    for (size_t i=0 ; i<DisplayDevice::DISPLAY_ID_COUNT ; i++) {
407        mDefaultDisplays[i] = new BBinder();
408        mCurrentState.displays.add(mDefaultDisplays[i], DisplayDeviceState(i));
409    }
410    sp<DisplayDevice> hw = new DisplayDevice(this,
411            DisplayDevice::DISPLAY_ID_MAIN, anw, fbs, mEGLConfig);
412    mDisplays.add(hw->getDisplayId(), hw);
413
414    //  initialize OpenGL ES
415    EGLSurface surface = hw->getEGLSurface();
416    initializeGL(mEGLDisplay, surface);
417
418    // start the EventThread
419    mEventThread = new EventThread(this);
420    mEventQueue.setEventThread(mEventThread);
421
422    // initialize the H/W composer
423    mHwc = new HWComposer(this,
424            *static_cast<HWComposer::EventHandler *>(this),
425            fbs->getFbHal());
426
427    // initialize our drawing state
428    mDrawingState = mCurrentState;
429
430    // We're now ready to accept clients...
431    mReadyToRunBarrier.open();
432
433    // start boot animation
434    startBootAnim();
435
436    return NO_ERROR;
437}
438
439void SurfaceFlinger::startBootAnim() {
440    // start boot animation
441    property_set("service.bootanim.exit", "0");
442    property_set("ctl.start", "bootanim");
443}
444
445uint32_t SurfaceFlinger::getMaxTextureSize() const {
446    return mMaxTextureSize;
447}
448
449uint32_t SurfaceFlinger::getMaxViewportDims() const {
450    return mMaxViewportDims[0] < mMaxViewportDims[1] ?
451            mMaxViewportDims[0] : mMaxViewportDims[1];
452}
453
454// ----------------------------------------------------------------------------
455
456bool SurfaceFlinger::authenticateSurfaceTexture(
457        const sp<ISurfaceTexture>& surfaceTexture) const {
458    Mutex::Autolock _l(mStateLock);
459    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
460
461    // Check the visible layer list for the ISurface
462    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
463    size_t count = currentLayers.size();
464    for (size_t i=0 ; i<count ; i++) {
465        const sp<LayerBase>& layer(currentLayers[i]);
466        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
467        if (lbc != NULL) {
468            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
469            if (lbcBinder == surfaceTextureBinder) {
470                return true;
471            }
472        }
473    }
474
475    // Check the layers in the purgatory.  This check is here so that if a
476    // SurfaceTexture gets destroyed before all the clients are done using it,
477    // the error will not be reported as "surface XYZ is not authenticated", but
478    // will instead fail later on when the client tries to use the surface,
479    // which should be reported as "surface XYZ returned an -ENODEV".  The
480    // purgatorized layers are no less authentic than the visible ones, so this
481    // should not cause any harm.
482    size_t purgatorySize =  mLayerPurgatory.size();
483    for (size_t i=0 ; i<purgatorySize ; i++) {
484        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
485        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
486        if (lbc != NULL) {
487            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
488            if (lbcBinder == surfaceTextureBinder) {
489                return true;
490            }
491        }
492    }
493
494    return false;
495}
496
497status_t SurfaceFlinger::getDisplayInfo(DisplayID dpy, DisplayInfo* info) {
498    // TODO: this is here only for compatibility -- should go away eventually.
499    if (uint32_t(dpy) >= 1) {
500        return BAD_INDEX;
501    }
502
503    const HWComposer& hwc(getHwComposer());
504    float xdpi = hwc.getDpiX();
505    float ydpi = hwc.getDpiY();
506
507    // TODO: Not sure if display density should handled by SF any longer
508    class Density {
509        static int getDensityFromProperty(char const* propName) {
510            char property[PROPERTY_VALUE_MAX];
511            int density = 0;
512            if (property_get(propName, property, NULL) > 0) {
513                density = atoi(property);
514            }
515            return density;
516        }
517    public:
518        static int getEmuDensity() {
519            return getDensityFromProperty("qemu.sf.lcd_density"); }
520        static int getBuildDensity()  {
521            return getDensityFromProperty("ro.sf.lcd_density"); }
522    };
523    // The density of the device is provided by a build property
524    float density = Density::getBuildDensity() / 160.0f;
525    if (density == 0) {
526        // the build doesn't provide a density -- this is wrong!
527        // use xdpi instead
528        ALOGE("ro.sf.lcd_density must be defined as a build property");
529        density = xdpi / 160.0f;
530    }
531    if (Density::getEmuDensity()) {
532        // if "qemu.sf.lcd_density" is specified, it overrides everything
533        xdpi = ydpi = density = Density::getEmuDensity();
534        density /= 160.0f;
535    }
536
537    sp<const DisplayDevice> hw(getDefaultDisplayDevice());
538    info->w = hw->getWidth();
539    info->h = hw->getHeight();
540    info->xdpi = xdpi;
541    info->ydpi = ydpi;
542    info->fps = float(1e9 / hwc.getRefreshPeriod());
543    info->density = density;
544    info->orientation = hw->getOrientation();
545    // TODO: this needs to go away (currently needed only by webkit)
546    getPixelFormatInfo(hw->getFormat(), &info->pixelFormatInfo);
547    return NO_ERROR;
548}
549
550// ----------------------------------------------------------------------------
551
552sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
553    return mEventThread->createEventConnection();
554}
555
556void SurfaceFlinger::connectDisplay(const sp<ISurfaceTexture> display) {
557    EGLSurface result = EGL_NO_SURFACE;
558    EGLSurface old_surface = EGL_NO_SURFACE;
559    sp<SurfaceTextureClient> stc;
560
561    if (display != NULL) {
562        stc = new SurfaceTextureClient(display);
563        result = eglCreateWindowSurface(mEGLDisplay,
564                mEGLConfig, (EGLNativeWindowType)stc.get(), NULL);
565        ALOGE_IF(result == EGL_NO_SURFACE,
566                "eglCreateWindowSurface failed (ISurfaceTexture=%p)",
567                display.get());
568    }
569
570    { // scope for the lock
571        Mutex::Autolock _l(mStateLock);
572        old_surface = mExternalDisplaySurface;
573        mExternalDisplayNativeWindow = stc;
574        mExternalDisplaySurface = result;
575        ALOGD("mExternalDisplaySurface = %p", result);
576    }
577
578    if (old_surface != EGL_NO_SURFACE) {
579        // Note: EGL allows to destroy an object while its current
580        // it will fail to become current next time though.
581        eglDestroySurface(mEGLDisplay, old_surface);
582    }
583}
584
585EGLSurface SurfaceFlinger::getExternalDisplaySurface() const {
586    Mutex::Autolock _l(mStateLock);
587    return mExternalDisplaySurface;
588}
589
590// ----------------------------------------------------------------------------
591
592void SurfaceFlinger::waitForEvent() {
593    mEventQueue.waitMessage();
594}
595
596void SurfaceFlinger::signalTransaction() {
597    mEventQueue.invalidate();
598}
599
600void SurfaceFlinger::signalLayerUpdate() {
601    mEventQueue.invalidate();
602}
603
604void SurfaceFlinger::signalRefresh() {
605    mEventQueue.refresh();
606}
607
608status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
609        nsecs_t reltime, uint32_t flags) {
610    return mEventQueue.postMessage(msg, reltime);
611}
612
613status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
614        nsecs_t reltime, uint32_t flags) {
615    status_t res = mEventQueue.postMessage(msg, reltime);
616    if (res == NO_ERROR) {
617        msg->wait();
618    }
619    return res;
620}
621
622bool SurfaceFlinger::threadLoop() {
623    waitForEvent();
624    return true;
625}
626
627void SurfaceFlinger::onVSyncReceived(int dpy, nsecs_t timestamp) {
628    mEventThread->onVSyncReceived(dpy, timestamp);
629}
630
631void SurfaceFlinger::eventControl(int event, int enabled) {
632    getHwComposer().eventControl(event, enabled);
633}
634
635void SurfaceFlinger::onMessageReceived(int32_t what) {
636    ATRACE_CALL();
637    switch (what) {
638    case MessageQueue::INVALIDATE:
639        handleMessageTransaction();
640        handleMessageInvalidate();
641        signalRefresh();
642        break;
643    case MessageQueue::REFRESH:
644        handleMessageRefresh();
645        break;
646    }
647}
648
649void SurfaceFlinger::handleMessageTransaction() {
650    uint32_t transactionFlags = peekTransactionFlags(eTransactionMask);
651    if (transactionFlags) {
652        handleTransaction(transactionFlags);
653    }
654}
655
656void SurfaceFlinger::handleMessageInvalidate() {
657    handlePageFlip();
658}
659
660void SurfaceFlinger::handleMessageRefresh() {
661    handleRefresh();
662
663    if (CC_UNLIKELY(mVisibleRegionsDirty)) {
664        mVisibleRegionsDirty = false;
665        invalidateHwcGeometry();
666
667        /*
668         *  rebuild the visible layer list per screen
669         */
670
671        const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
672        for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
673            const sp<DisplayDevice>& hw(mDisplays[dpy]);
674            Region opaqueRegion;
675            Region dirtyRegion;
676            computeVisibleRegions(currentLayers,
677                    hw->getLayerStack(), dirtyRegion, opaqueRegion);
678            hw->dirtyRegion.orSelf(dirtyRegion);
679
680            Vector< sp<LayerBase> > layersSortedByZ;
681            const size_t count = currentLayers.size();
682            for (size_t i=0 ; i<count ; i++) {
683                const Layer::State& s(currentLayers[i]->drawingState());
684                if (s.layerStack == hw->getLayerStack()) {
685                    if (!currentLayers[i]->visibleRegion.isEmpty()) {
686                        layersSortedByZ.add(currentLayers[i]);
687                    }
688                }
689            }
690            hw->setVisibleLayersSortedByZ(layersSortedByZ);
691            hw->undefinedRegion.set(hw->getBounds());
692            hw->undefinedRegion.subtractSelf(hw->getTransform().transform(opaqueRegion));
693        }
694    }
695
696    HWComposer& hwc(getHwComposer());
697    if (hwc.initCheck() == NO_ERROR) {
698        // build the h/w work list
699        const bool workListsDirty = mHwWorkListDirty;
700        mHwWorkListDirty = false;
701        for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
702            sp<const DisplayDevice> hw(mDisplays[dpy]);
703            const Vector< sp<LayerBase> >& currentLayers(hw->getVisibleLayersSortedByZ());
704            const size_t count = currentLayers.size();
705
706            const int32_t id = hw->getDisplayId();
707            if (hwc.createWorkList(id, count) >= 0) {
708                HWComposer::LayerListIterator cur = hwc.begin(id);
709                const HWComposer::LayerListIterator end = hwc.end(id);
710                for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
711                    const sp<LayerBase>& layer(currentLayers[i]);
712
713                    if (CC_UNLIKELY(workListsDirty)) {
714                        layer->setGeometry(hw, *cur);
715                        if (mDebugDisableHWC || mDebugRegion) {
716                            cur->setSkip(true);
717                        }
718                    }
719
720                    /*
721                     * update the per-frame h/w composer data for each layer
722                     * and build the transparent region of the FB
723                     */
724                    layer->setPerFrameData(hw, *cur);
725                }
726            }
727        }
728        status_t err = hwc.prepare();
729        ALOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
730    }
731
732    const bool repaintEverything = android_atomic_and(0, &mRepaintEverything);
733    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
734        const sp<DisplayDevice>& hw(mDisplays[dpy]);
735
736        // transform the dirty region into this screen's coordinate space
737        const Transform& planeTransform(hw->getTransform());
738        Region dirtyRegion;
739        if (repaintEverything) {
740            dirtyRegion.set(hw->bounds());
741        } else {
742            dirtyRegion = planeTransform.transform(hw->dirtyRegion);
743            dirtyRegion.andSelf(hw->bounds());
744        }
745        hw->dirtyRegion.clear();
746
747        if (!dirtyRegion.isEmpty()) {
748            if (hw->canDraw()) {
749                // repaint the framebuffer (if needed)
750                handleRepaint(hw, dirtyRegion);
751            }
752        }
753        // inform the h/w that we're done compositing
754        hw->compositionComplete();
755    }
756
757    postFramebuffer();
758
759
760#if 1
761    // render to the external display if we have one
762    EGLSurface externalDisplaySurface = getExternalDisplaySurface();
763    if (externalDisplaySurface != EGL_NO_SURFACE) {
764        EGLSurface cur = eglGetCurrentSurface(EGL_DRAW);
765        EGLBoolean success = eglMakeCurrent(eglGetCurrentDisplay(),
766                externalDisplaySurface, externalDisplaySurface,
767                eglGetCurrentContext());
768
769        ALOGE_IF(!success, "eglMakeCurrent -> external failed");
770
771        if (success) {
772            // redraw the screen entirely...
773            glDisable(GL_TEXTURE_EXTERNAL_OES);
774            glDisable(GL_TEXTURE_2D);
775            glClearColor(0,0,0,1);
776            glClear(GL_COLOR_BUFFER_BIT);
777            glMatrixMode(GL_MODELVIEW);
778            glLoadIdentity();
779
780            const sp<DisplayDevice>& hw(getDisplayDevice(0));
781            const Vector< sp<LayerBase> >& layers( hw->getVisibleLayersSortedByZ() );
782            const size_t count = layers.size();
783            for (size_t i=0 ; i<count ; ++i) {
784                const sp<LayerBase>& layer(layers[i]);
785                layer->draw(hw);
786            }
787
788            success = eglSwapBuffers(eglGetCurrentDisplay(), externalDisplaySurface);
789            ALOGE_IF(!success, "external display eglSwapBuffers failed");
790
791            hw->compositionComplete();
792        }
793
794        success = eglMakeCurrent(eglGetCurrentDisplay(),
795                cur, cur, eglGetCurrentContext());
796
797        ALOGE_IF(!success, "eglMakeCurrent -> internal failed");
798    }
799#endif
800
801}
802
803void SurfaceFlinger::postFramebuffer()
804{
805    ATRACE_CALL();
806
807    const nsecs_t now = systemTime();
808    mDebugInSwapBuffers = now;
809
810    HWComposer& hwc(getHwComposer());
811
812    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
813        const sp<DisplayDevice>& hw(mDisplays[dpy]);
814        if (hwc.initCheck() == NO_ERROR) {
815            const Vector< sp<LayerBase> >& currentLayers(hw->getVisibleLayersSortedByZ());
816            const size_t count = currentLayers.size();
817            const int32_t id = hw->getDisplayId();
818            HWComposer::LayerListIterator cur = hwc.begin(id);
819            const HWComposer::LayerListIterator end = hwc.end(id);
820            for (size_t i=0 ; cur!=end && i<count ; ++i, ++cur) {
821                const sp<LayerBase>& layer(currentLayers[i]);
822                layer->setAcquireFence(hw, *cur);
823            }
824        }
825        hw->flip(hw->swapRegion);
826        hw->swapRegion.clear();
827    }
828
829    if (hwc.initCheck() == NO_ERROR) {
830        // FIXME: eventually commit() won't take arguments
831        hwc.commit(mEGLDisplay, getDefaultDisplayDevice()->getEGLSurface());
832    }
833
834    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
835        sp<const DisplayDevice> hw(mDisplays[dpy]);
836        const Vector< sp<LayerBase> >& currentLayers(hw->getVisibleLayersSortedByZ());
837        const size_t count = currentLayers.size();
838        if (hwc.initCheck() == NO_ERROR) {
839            int32_t id = hw->getDisplayId();
840            HWComposer::LayerListIterator cur = hwc.begin(id);
841            const HWComposer::LayerListIterator end = hwc.end(id);
842            for (size_t i = 0; cur != end && i < count; ++i, ++cur) {
843                currentLayers[i]->onLayerDisplayed(hw, &*cur);
844            }
845        } else {
846            eglSwapBuffers(mEGLDisplay, hw->getEGLSurface());
847            for (size_t i = 0; i < count; i++) {
848                currentLayers[i]->onLayerDisplayed(hw, NULL);
849            }
850        }
851
852        // FIXME: we need to call eglSwapBuffers() on displays that have GL composition
853    }
854
855    mLastSwapBufferTime = systemTime() - now;
856    mDebugInSwapBuffers = 0;
857}
858
859void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
860{
861    ATRACE_CALL();
862
863    Mutex::Autolock _l(mStateLock);
864    const nsecs_t now = systemTime();
865    mDebugInTransaction = now;
866
867    // Here we're guaranteed that some transaction flags are set
868    // so we can call handleTransactionLocked() unconditionally.
869    // We call getTransactionFlags(), which will also clear the flags,
870    // with mStateLock held to guarantee that mCurrentState won't change
871    // until the transaction is committed.
872
873    transactionFlags = getTransactionFlags(eTransactionMask);
874    handleTransactionLocked(transactionFlags);
875
876    mLastTransactionTime = systemTime() - now;
877    mDebugInTransaction = 0;
878    invalidateHwcGeometry();
879    // here the transaction has been committed
880}
881
882void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
883{
884    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
885    const size_t count = currentLayers.size();
886
887    /*
888     * Traversal of the children
889     * (perform the transaction for each of them if needed)
890     */
891
892    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
893    if (layersNeedTransaction) {
894        for (size_t i=0 ; i<count ; i++) {
895            const sp<LayerBase>& layer = currentLayers[i];
896            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
897            if (!trFlags) continue;
898
899            const uint32_t flags = layer->doTransaction(0);
900            if (flags & Layer::eVisibleRegion)
901                mVisibleRegionsDirty = true;
902        }
903    }
904
905    /*
906     * Perform our own transaction if needed
907     */
908
909    if (transactionFlags & eDisplayTransactionNeeded) {
910        // here we take advantage of Vector's copy-on-write semantics to
911        // improve performance by skipping the transaction entirely when
912        // know that the lists are identical
913        const KeyedVector<  wp<IBinder>, DisplayDeviceState>& curr(mCurrentState.displays);
914        const KeyedVector<  wp<IBinder>, DisplayDeviceState>& draw(mDrawingState.displays);
915        if (!curr.isIdenticalTo(draw)) {
916            mVisibleRegionsDirty = true;
917            const size_t cc = curr.size();
918            const size_t dc = draw.size();
919
920            // find the displays that were removed
921            // (ie: in drawing state but not in current state)
922            // also handle displays that changed
923            // (ie: displays that are in both lists)
924            for (size_t i=0 ; i<dc ; i++) {
925                const ssize_t j = curr.indexOfKey(draw.keyAt(i));
926                if (j < 0) {
927                    // in drawing state but not in current state
928                    if (draw[i].id != DisplayDevice::DISPLAY_ID_MAIN) {
929                        mDisplays.removeItem(draw[i].id);
930                    } else {
931                        ALOGW("trying to remove the main display");
932                    }
933                } else {
934                    // this display is in both lists. see if something changed.
935                    const DisplayDeviceState& state(curr[j]);
936                    if (state.surface != draw[i].surface) {
937                        // changing the surface is like destroying and
938                        // recreating the DisplayDevice
939
940                        sp<SurfaceTextureClient> stc(
941                                new SurfaceTextureClient(state.surface));
942
943                        sp<DisplayDevice> disp = new DisplayDevice(this,
944                                state.id, stc, 0, mEGLConfig);
945
946                        disp->setLayerStack(state.layerStack);
947                        disp->setOrientation(state.orientation);
948                        // TODO: take viewport and frame into account
949                        mDisplays.replaceValueFor(state.id, disp);
950                    }
951                    if (state.layerStack != draw[i].layerStack) {
952                        const sp<DisplayDevice>& disp(getDisplayDevice(state.id));
953                        disp->setLayerStack(state.layerStack);
954                    }
955                    if (state.orientation != draw[i].orientation ||
956                        state.viewport != draw[i].viewport ||
957                        state.frame != draw[i].frame) {
958                        const sp<DisplayDevice>& disp(getDisplayDevice(state.id));
959                        disp->setOrientation(state.orientation);
960                        // TODO: take viewport and frame into account
961                    }
962                }
963            }
964
965            // find displays that were added
966            // (ie: in current state but not in drawing state)
967            for (size_t i=0 ; i<cc ; i++) {
968                if (draw.indexOfKey(curr.keyAt(i)) < 0) {
969                    // FIXME: we need to pass the surface here
970                    const DisplayDeviceState& state(curr[i]);
971                    sp<SurfaceTextureClient> stc(
972                            new SurfaceTextureClient(state.surface));
973                    sp<DisplayDevice> disp = new DisplayDevice(this, state.id,
974                            stc, 0, mEGLConfig);
975                    mDisplays.add(state.id, disp);
976                }
977            }
978        }
979
980        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
981            // layers have been added
982            mVisibleRegionsDirty = true;
983        }
984
985        // some layers might have been removed, so
986        // we need to update the regions they're exposing.
987        if (mLayersRemoved) {
988            mLayersRemoved = false;
989            mVisibleRegionsDirty = true;
990            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
991            const size_t count = previousLayers.size();
992            for (size_t i=0 ; i<count ; i++) {
993                const sp<LayerBase>& layer(previousLayers[i]);
994                if (currentLayers.indexOf(layer) < 0) {
995                    // this layer is not visible anymore
996                    // TODO: we could traverse the tree from front to back and
997                    //       compute the actual visible region
998                    // TODO: we could cache the transformed region
999                    Layer::State front(layer->drawingState());
1000                    Region visibleReg = front.transform.transform(
1001                            Region(Rect(front.active.w, front.active.h)));
1002                    invalidateLayerStack(front.layerStack, visibleReg);
1003                }
1004            }
1005        }
1006    }
1007
1008    commitTransaction();
1009}
1010
1011void SurfaceFlinger::commitTransaction()
1012{
1013    if (!mLayersPendingRemoval.isEmpty()) {
1014        // Notify removed layers now that they can't be drawn from
1015        for (size_t i = 0; i < mLayersPendingRemoval.size(); i++) {
1016            mLayersPendingRemoval[i]->onRemoved();
1017        }
1018        mLayersPendingRemoval.clear();
1019    }
1020
1021    mDrawingState = mCurrentState;
1022    mTransationPending = false;
1023    mTransactionCV.broadcast();
1024}
1025
1026void SurfaceFlinger::computeVisibleRegions(
1027        const LayerVector& currentLayers, uint32_t layerStack,
1028        Region& outDirtyRegion, Region& outOpaqueRegion)
1029{
1030    ATRACE_CALL();
1031
1032    Region aboveOpaqueLayers;
1033    Region aboveCoveredLayers;
1034    Region dirty;
1035
1036    outDirtyRegion.clear();
1037
1038    size_t i = currentLayers.size();
1039    while (i--) {
1040        const sp<LayerBase>& layer = currentLayers[i];
1041
1042        // start with the whole surface at its current location
1043        const Layer::State& s(layer->drawingState());
1044
1045        // only consider the layers on the given later stack
1046        if (s.layerStack != layerStack)
1047            continue;
1048
1049        /*
1050         * opaqueRegion: area of a surface that is fully opaque.
1051         */
1052        Region opaqueRegion;
1053
1054        /*
1055         * visibleRegion: area of a surface that is visible on screen
1056         * and not fully transparent. This is essentially the layer's
1057         * footprint minus the opaque regions above it.
1058         * Areas covered by a translucent surface are considered visible.
1059         */
1060        Region visibleRegion;
1061
1062        /*
1063         * coveredRegion: area of a surface that is covered by all
1064         * visible regions above it (which includes the translucent areas).
1065         */
1066        Region coveredRegion;
1067
1068
1069        // handle hidden surfaces by setting the visible region to empty
1070        if (CC_LIKELY(!(s.flags & layer_state_t::eLayerHidden) && s.alpha)) {
1071            const bool translucent = !layer->isOpaque();
1072            Rect bounds(layer->computeBounds());
1073            visibleRegion.set(bounds);
1074            if (!visibleRegion.isEmpty()) {
1075                // Remove the transparent area from the visible region
1076                if (translucent) {
1077                    Region transparentRegionScreen;
1078                    const Transform tr(s.transform);
1079                    if (tr.transformed()) {
1080                        if (tr.preserveRects()) {
1081                            // transform the transparent region
1082                            transparentRegionScreen = tr.transform(s.transparentRegion);
1083                        } else {
1084                            // transformation too complex, can't do the
1085                            // transparent region optimization.
1086                            transparentRegionScreen.clear();
1087                        }
1088                    } else {
1089                        transparentRegionScreen = s.transparentRegion;
1090                    }
1091                    visibleRegion.subtractSelf(transparentRegionScreen);
1092                }
1093
1094                // compute the opaque region
1095                const int32_t layerOrientation = s.transform.getOrientation();
1096                if (s.alpha==255 && !translucent &&
1097                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
1098                    // the opaque region is the layer's footprint
1099                    opaqueRegion = visibleRegion;
1100                }
1101            }
1102        }
1103
1104        // Clip the covered region to the visible region
1105        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
1106
1107        // Update aboveCoveredLayers for next (lower) layer
1108        aboveCoveredLayers.orSelf(visibleRegion);
1109
1110        // subtract the opaque region covered by the layers above us
1111        visibleRegion.subtractSelf(aboveOpaqueLayers);
1112
1113        // compute this layer's dirty region
1114        if (layer->contentDirty) {
1115            // we need to invalidate the whole region
1116            dirty = visibleRegion;
1117            // as well, as the old visible region
1118            dirty.orSelf(layer->visibleRegion);
1119            layer->contentDirty = false;
1120        } else {
1121            /* compute the exposed region:
1122             *   the exposed region consists of two components:
1123             *   1) what's VISIBLE now and was COVERED before
1124             *   2) what's EXPOSED now less what was EXPOSED before
1125             *
1126             * note that (1) is conservative, we start with the whole
1127             * visible region but only keep what used to be covered by
1128             * something -- which mean it may have been exposed.
1129             *
1130             * (2) handles areas that were not covered by anything but got
1131             * exposed because of a resize.
1132             */
1133            const Region newExposed = visibleRegion - coveredRegion;
1134            const Region oldVisibleRegion = layer->visibleRegion;
1135            const Region oldCoveredRegion = layer->coveredRegion;
1136            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
1137            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
1138        }
1139        dirty.subtractSelf(aboveOpaqueLayers);
1140
1141        // accumulate to the screen dirty region
1142        outDirtyRegion.orSelf(dirty);
1143
1144        // Update aboveOpaqueLayers for next (lower) layer
1145        aboveOpaqueLayers.orSelf(opaqueRegion);
1146
1147        // Store the visible region is screen space
1148        layer->setVisibleRegion(visibleRegion);
1149        layer->setCoveredRegion(coveredRegion);
1150    }
1151
1152    outOpaqueRegion = aboveOpaqueLayers;
1153}
1154
1155void SurfaceFlinger::invalidateLayerStack(uint32_t layerStack,
1156        const Region& dirty) {
1157    for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
1158        const sp<DisplayDevice>& hw(mDisplays[dpy]);
1159        if (hw->getLayerStack() == layerStack) {
1160            hw->dirtyRegion.orSelf(dirty);
1161        }
1162    }
1163}
1164
1165void SurfaceFlinger::handlePageFlip()
1166{
1167    ATRACE_CALL();
1168    Region dirtyRegion;
1169
1170    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
1171
1172    bool visibleRegions = false;
1173    const size_t count = currentLayers.size();
1174    sp<LayerBase> const* layers = currentLayers.array();
1175    for (size_t i=0 ; i<count ; i++) {
1176        const sp<LayerBase>& layer(layers[i]);
1177        const Region dirty(layer->latchBuffer(visibleRegions));
1178        Layer::State s(layer->drawingState());
1179        invalidateLayerStack(s.layerStack, dirty);
1180    }
1181
1182    mVisibleRegionsDirty |= visibleRegions;
1183}
1184
1185void SurfaceFlinger::invalidateHwcGeometry()
1186{
1187    mHwWorkListDirty = true;
1188}
1189
1190void SurfaceFlinger::handleRefresh()
1191{
1192    bool needInvalidate = false;
1193    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
1194    const size_t count = currentLayers.size();
1195    for (size_t i=0 ; i<count ; i++) {
1196        const sp<LayerBase>& layer(currentLayers[i]);
1197        if (layer->onPreComposition()) {
1198            needInvalidate = true;
1199        }
1200    }
1201    if (needInvalidate) {
1202        signalLayerUpdate();
1203    }
1204}
1205
1206void SurfaceFlinger::handleRepaint(const sp<const DisplayDevice>& hw,
1207        const Region& inDirtyRegion)
1208{
1209    ATRACE_CALL();
1210
1211    Region dirtyRegion(inDirtyRegion);
1212
1213    // compute the invalid region
1214    hw->swapRegion.orSelf(dirtyRegion);
1215
1216    if (CC_UNLIKELY(mDebugRegion)) {
1217        debugFlashRegions(hw, dirtyRegion);
1218    }
1219
1220    uint32_t flags = hw->getFlags();
1221    if (flags & DisplayDevice::SWAP_RECTANGLE) {
1222        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
1223        // takes a rectangle, we must make sure to update that whole
1224        // rectangle in that case
1225        dirtyRegion.set(hw->swapRegion.bounds());
1226    } else {
1227        if (flags & DisplayDevice::PARTIAL_UPDATES) {
1228            // We need to redraw the rectangle that will be updated
1229            // (pushed to the framebuffer).
1230            // This is needed because PARTIAL_UPDATES only takes one
1231            // rectangle instead of a region (see DisplayDevice::flip())
1232            dirtyRegion.set(hw->swapRegion.bounds());
1233        } else {
1234            // we need to redraw everything (the whole screen)
1235            dirtyRegion.set(hw->bounds());
1236            hw->swapRegion = dirtyRegion;
1237        }
1238    }
1239
1240    composeSurfaces(hw, dirtyRegion);
1241
1242    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
1243    const size_t count = currentLayers.size();
1244    for (size_t i=0 ; i<count ; i++) {
1245        currentLayers[i]->onPostComposition();
1246    }
1247
1248    // update the swap region and clear the dirty region
1249    hw->swapRegion.orSelf(dirtyRegion);
1250}
1251
1252void SurfaceFlinger::composeSurfaces(const sp<const DisplayDevice>& hw, const Region& dirty)
1253{
1254    HWComposer& hwc(getHwComposer());
1255    int32_t id = hw->getDisplayId();
1256    HWComposer::LayerListIterator cur = hwc.begin(id);
1257    const HWComposer::LayerListIterator end = hwc.end(id);
1258
1259    const size_t fbLayerCount = hwc.getLayerCount(id, HWC_FRAMEBUFFER);
1260    if (cur==end || fbLayerCount) {
1261
1262        DisplayDevice::makeCurrent(hw, mEGLContext);
1263
1264        // set the frame buffer
1265        glMatrixMode(GL_MODELVIEW);
1266        glLoadIdentity();
1267
1268        // Never touch the framebuffer if we don't have any framebuffer layers
1269        if (hwc.getLayerCount(id, HWC_OVERLAY)) {
1270            // when using overlays, we assume a fully transparent framebuffer
1271            // NOTE: we could reduce how much we need to clear, for instance
1272            // remove where there are opaque FB layers. however, on some
1273            // GPUs doing a "clean slate" glClear might be more efficient.
1274            // We'll revisit later if needed.
1275            glClearColor(0, 0, 0, 0);
1276            glClear(GL_COLOR_BUFFER_BIT);
1277        } else {
1278            const Region region(hw->undefinedRegion.intersect(dirty));
1279            // screen is already cleared here
1280            if (!region.isEmpty()) {
1281                // can happen with SurfaceView
1282                drawWormhole(region);
1283            }
1284        }
1285
1286        /*
1287         * and then, render the layers targeted at the framebuffer
1288         */
1289
1290        const Vector< sp<LayerBase> >& layers(hw->getVisibleLayersSortedByZ());
1291        const size_t count = layers.size();
1292        const Transform& tr = hw->getTransform();
1293        for (size_t i=0 ; i<count ; ++i) {
1294            const sp<LayerBase>& layer(layers[i]);
1295            const Region clip(dirty.intersect(tr.transform(layer->visibleRegion)));
1296            if (!clip.isEmpty()) {
1297                if (cur != end && cur->getCompositionType() == HWC_OVERLAY) {
1298                    if (i && (cur->getHints() & HWC_HINT_CLEAR_FB)
1299                            && layer->isOpaque()) {
1300                        // never clear the very first layer since we're
1301                        // guaranteed the FB is already cleared
1302                        layer->clearWithOpenGL(hw, clip);
1303                    }
1304                    ++cur;
1305                    continue;
1306                }
1307                // render the layer
1308                layer->draw(hw, clip);
1309            }
1310            if (cur != end) {
1311                ++cur;
1312            }
1313        }
1314    }
1315}
1316
1317void SurfaceFlinger::debugFlashRegions(const sp<const DisplayDevice>& hw,
1318        const Region& dirtyRegion)
1319{
1320    const uint32_t flags = hw->getFlags();
1321    const int32_t height = hw->getHeight();
1322    if (hw->swapRegion.isEmpty()) {
1323        return;
1324    }
1325
1326    if (!(flags & DisplayDevice::SWAP_RECTANGLE)) {
1327        const Region repaint((flags & DisplayDevice::PARTIAL_UPDATES) ?
1328                dirtyRegion.bounds() : hw->bounds());
1329        composeSurfaces(hw, repaint);
1330    }
1331
1332    glDisable(GL_TEXTURE_EXTERNAL_OES);
1333    glDisable(GL_TEXTURE_2D);
1334    glDisable(GL_BLEND);
1335
1336    static int toggle = 0;
1337    toggle = 1 - toggle;
1338    if (toggle) {
1339        glColor4f(1, 0, 1, 1);
1340    } else {
1341        glColor4f(1, 1, 0, 1);
1342    }
1343
1344    Region::const_iterator it = dirtyRegion.begin();
1345    Region::const_iterator const end = dirtyRegion.end();
1346    while (it != end) {
1347        const Rect& r = *it++;
1348        GLfloat vertices[][2] = {
1349                { r.left,  height - r.top },
1350                { r.left,  height - r.bottom },
1351                { r.right, height - r.bottom },
1352                { r.right, height - r.top }
1353        };
1354        glVertexPointer(2, GL_FLOAT, 0, vertices);
1355        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1356    }
1357
1358    hw->flip(hw->swapRegion);
1359
1360    if (mDebugRegion > 1)
1361        usleep(mDebugRegion * 1000);
1362}
1363
1364void SurfaceFlinger::drawWormhole(const Region& region) const
1365{
1366    glDisable(GL_TEXTURE_EXTERNAL_OES);
1367    glDisable(GL_TEXTURE_2D);
1368    glDisable(GL_BLEND);
1369    glColor4f(0,0,0,0);
1370
1371    GLfloat vertices[4][2];
1372    glVertexPointer(2, GL_FLOAT, 0, vertices);
1373    Region::const_iterator it = region.begin();
1374    Region::const_iterator const end = region.end();
1375    while (it != end) {
1376        const Rect& r = *it++;
1377        vertices[0][0] = r.left;
1378        vertices[0][1] = r.top;
1379        vertices[1][0] = r.right;
1380        vertices[1][1] = r.top;
1381        vertices[2][0] = r.right;
1382        vertices[2][1] = r.bottom;
1383        vertices[3][0] = r.left;
1384        vertices[3][1] = r.bottom;
1385        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1386    }
1387}
1388
1389ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1390        const sp<LayerBaseClient>& lbc)
1391{
1392    // attach this layer to the client
1393    size_t name = client->attachLayer(lbc);
1394
1395    // add this layer to the current state list
1396    Mutex::Autolock _l(mStateLock);
1397    mCurrentState.layersSortedByZ.add(lbc);
1398
1399    return ssize_t(name);
1400}
1401
1402status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1403{
1404    Mutex::Autolock _l(mStateLock);
1405    status_t err = purgatorizeLayer_l(layer);
1406    if (err == NO_ERROR)
1407        setTransactionFlags(eTransactionNeeded);
1408    return err;
1409}
1410
1411status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1412{
1413    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1414    if (index >= 0) {
1415        mLayersRemoved = true;
1416        return NO_ERROR;
1417    }
1418    return status_t(index);
1419}
1420
1421status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1422{
1423    // First add the layer to the purgatory list, which makes sure it won't
1424    // go away, then remove it from the main list (through a transaction).
1425    ssize_t err = removeLayer_l(layerBase);
1426    if (err >= 0) {
1427        mLayerPurgatory.add(layerBase);
1428    }
1429
1430    mLayersPendingRemoval.push(layerBase);
1431
1432    // it's possible that we don't find a layer, because it might
1433    // have been destroyed already -- this is not technically an error
1434    // from the user because there is a race between Client::destroySurface(),
1435    // ~Client() and ~ISurface().
1436    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1437}
1438
1439uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1440{
1441    return android_atomic_release_load(&mTransactionFlags);
1442}
1443
1444uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1445{
1446    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1447}
1448
1449uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1450{
1451    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1452    if ((old & flags)==0) { // wake the server up
1453        signalTransaction();
1454    }
1455    return old;
1456}
1457
1458void SurfaceFlinger::setTransactionState(
1459        const Vector<ComposerState>& state,
1460        const Vector<DisplayState>& displays,
1461        uint32_t flags)
1462{
1463    Mutex::Autolock _l(mStateLock);
1464    uint32_t transactionFlags = 0;
1465
1466    size_t count = displays.size();
1467    for (size_t i=0 ; i<count ; i++) {
1468        const DisplayState& s(displays[i]);
1469        transactionFlags |= setDisplayStateLocked(s);
1470    }
1471
1472    count = state.size();
1473    for (size_t i=0 ; i<count ; i++) {
1474        const ComposerState& s(state[i]);
1475        sp<Client> client( static_cast<Client *>(s.client.get()) );
1476        transactionFlags |= setClientStateLocked(client, s.state);
1477    }
1478
1479    if (transactionFlags) {
1480        // this triggers the transaction
1481        setTransactionFlags(transactionFlags);
1482
1483        // if this is a synchronous transaction, wait for it to take effect
1484        // before returning.
1485        if (flags & eSynchronous) {
1486            mTransationPending = true;
1487        }
1488        while (mTransationPending) {
1489            status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1490            if (CC_UNLIKELY(err != NO_ERROR)) {
1491                // just in case something goes wrong in SF, return to the
1492                // called after a few seconds.
1493                ALOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1494                mTransationPending = false;
1495                break;
1496            }
1497        }
1498    }
1499}
1500
1501uint32_t SurfaceFlinger::setDisplayStateLocked(const DisplayState& s)
1502{
1503    uint32_t flags = 0;
1504    DisplayDeviceState& disp(mCurrentState.displays.editValueFor(s.token));
1505    if (disp.id >= 0) {
1506        const uint32_t what = s.what;
1507        if (what & DisplayState::eSurfaceChanged) {
1508            if (disp.surface->asBinder() != s.surface->asBinder()) {
1509                disp.surface = s.surface;
1510                flags |= eDisplayTransactionNeeded;
1511            }
1512        }
1513        if (what & DisplayState::eLayerStackChanged) {
1514            if (disp.layerStack != s.layerStack) {
1515                disp.layerStack = s.layerStack;
1516                flags |= eDisplayTransactionNeeded;
1517            }
1518        }
1519        if (what & DisplayState::eTransformChanged) {
1520            if (disp.orientation != s.orientation) {
1521                disp.orientation = s.orientation;
1522                flags |= eDisplayTransactionNeeded;
1523            }
1524            if (disp.frame != s.frame) {
1525                disp.frame = s.frame;
1526                flags |= eDisplayTransactionNeeded;
1527            }
1528            if (disp.viewport != s.viewport) {
1529                disp.viewport = s.viewport;
1530                flags |= eDisplayTransactionNeeded;
1531            }
1532        }
1533    }
1534    return flags;
1535}
1536
1537uint32_t SurfaceFlinger::setClientStateLocked(
1538        const sp<Client>& client,
1539        const layer_state_t& s)
1540{
1541    uint32_t flags = 0;
1542    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1543    if (layer != 0) {
1544        const uint32_t what = s.what;
1545        if (what & layer_state_t::ePositionChanged) {
1546            if (layer->setPosition(s.x, s.y))
1547                flags |= eTraversalNeeded;
1548        }
1549        if (what & layer_state_t::eLayerChanged) {
1550            // NOTE: index needs to be calculated before we update the state
1551            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1552            if (layer->setLayer(s.z)) {
1553                mCurrentState.layersSortedByZ.removeAt(idx);
1554                mCurrentState.layersSortedByZ.add(layer);
1555                // we need traversal (state changed)
1556                // AND transaction (list changed)
1557                flags |= eTransactionNeeded|eTraversalNeeded;
1558            }
1559        }
1560        if (what & layer_state_t::eSizeChanged) {
1561            if (layer->setSize(s.w, s.h)) {
1562                flags |= eTraversalNeeded;
1563            }
1564        }
1565        if (what & layer_state_t::eAlphaChanged) {
1566            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1567                flags |= eTraversalNeeded;
1568        }
1569        if (what & layer_state_t::eMatrixChanged) {
1570            if (layer->setMatrix(s.matrix))
1571                flags |= eTraversalNeeded;
1572        }
1573        if (what & layer_state_t::eTransparentRegionChanged) {
1574            if (layer->setTransparentRegionHint(s.transparentRegion))
1575                flags |= eTraversalNeeded;
1576        }
1577        if (what & layer_state_t::eVisibilityChanged) {
1578            if (layer->setFlags(s.flags, s.mask))
1579                flags |= eTraversalNeeded;
1580        }
1581        if (what & layer_state_t::eCropChanged) {
1582            if (layer->setCrop(s.crop))
1583                flags |= eTraversalNeeded;
1584        }
1585        if (what & layer_state_t::eLayerStackChanged) {
1586            // NOTE: index needs to be calculated before we update the state
1587            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1588            if (layer->setLayerStack(s.layerStack)) {
1589                mCurrentState.layersSortedByZ.removeAt(idx);
1590                mCurrentState.layersSortedByZ.add(layer);
1591                // we need traversal (state changed)
1592                // AND transaction (list changed)
1593                flags |= eTransactionNeeded|eTraversalNeeded;
1594            }
1595        }
1596    }
1597    return flags;
1598}
1599
1600sp<ISurface> SurfaceFlinger::createLayer(
1601        ISurfaceComposerClient::surface_data_t* params,
1602        const String8& name,
1603        const sp<Client>& client,
1604        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1605        uint32_t flags)
1606{
1607    sp<LayerBaseClient> layer;
1608    sp<ISurface> surfaceHandle;
1609
1610    if (int32_t(w|h) < 0) {
1611        ALOGE("createLayer() failed, w or h is negative (w=%d, h=%d)",
1612                int(w), int(h));
1613        return surfaceHandle;
1614    }
1615
1616    //ALOGD("createLayer for (%d x %d), name=%s", w, h, name.string());
1617    switch (flags & ISurfaceComposerClient::eFXSurfaceMask) {
1618        case ISurfaceComposerClient::eFXSurfaceNormal:
1619            layer = createNormalLayer(client, d, w, h, flags, format);
1620            break;
1621        case ISurfaceComposerClient::eFXSurfaceBlur:
1622        case ISurfaceComposerClient::eFXSurfaceDim:
1623            layer = createDimLayer(client, d, w, h, flags);
1624            break;
1625        case ISurfaceComposerClient::eFXSurfaceScreenshot:
1626            layer = createScreenshotLayer(client, d, w, h, flags);
1627            break;
1628    }
1629
1630    if (layer != 0) {
1631        layer->initStates(w, h, flags);
1632        layer->setName(name);
1633        ssize_t token = addClientLayer(client, layer);
1634        surfaceHandle = layer->getSurface();
1635        if (surfaceHandle != 0) {
1636            params->token = token;
1637            params->identity = layer->getIdentity();
1638        }
1639        setTransactionFlags(eTransactionNeeded);
1640    }
1641
1642    return surfaceHandle;
1643}
1644
1645sp<Layer> SurfaceFlinger::createNormalLayer(
1646        const sp<Client>& client, DisplayID display,
1647        uint32_t w, uint32_t h, uint32_t flags,
1648        PixelFormat& format)
1649{
1650    // initialize the surfaces
1651    switch (format) {
1652    case PIXEL_FORMAT_TRANSPARENT:
1653    case PIXEL_FORMAT_TRANSLUCENT:
1654        format = PIXEL_FORMAT_RGBA_8888;
1655        break;
1656    case PIXEL_FORMAT_OPAQUE:
1657#ifdef NO_RGBX_8888
1658        format = PIXEL_FORMAT_RGB_565;
1659#else
1660        format = PIXEL_FORMAT_RGBX_8888;
1661#endif
1662        break;
1663    }
1664
1665#ifdef NO_RGBX_8888
1666    if (format == PIXEL_FORMAT_RGBX_8888)
1667        format = PIXEL_FORMAT_RGBA_8888;
1668#endif
1669
1670    sp<Layer> layer = new Layer(this, display, client);
1671    status_t err = layer->setBuffers(w, h, format, flags);
1672    if (CC_LIKELY(err != NO_ERROR)) {
1673        ALOGE("createNormalLayer() failed (%s)", strerror(-err));
1674        layer.clear();
1675    }
1676    return layer;
1677}
1678
1679sp<LayerDim> SurfaceFlinger::createDimLayer(
1680        const sp<Client>& client, DisplayID display,
1681        uint32_t w, uint32_t h, uint32_t flags)
1682{
1683    sp<LayerDim> layer = new LayerDim(this, display, client);
1684    return layer;
1685}
1686
1687sp<LayerScreenshot> SurfaceFlinger::createScreenshotLayer(
1688        const sp<Client>& client, DisplayID display,
1689        uint32_t w, uint32_t h, uint32_t flags)
1690{
1691    sp<LayerScreenshot> layer = new LayerScreenshot(this, display, client);
1692    return layer;
1693}
1694
1695status_t SurfaceFlinger::onLayerRemoved(const sp<Client>& client, SurfaceID sid)
1696{
1697    /*
1698     * called by the window manager, when a surface should be marked for
1699     * destruction.
1700     *
1701     * The surface is removed from the current and drawing lists, but placed
1702     * in the purgatory queue, so it's not destroyed right-away (we need
1703     * to wait for all client's references to go away first).
1704     */
1705
1706    status_t err = NAME_NOT_FOUND;
1707    Mutex::Autolock _l(mStateLock);
1708    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1709
1710    if (layer != 0) {
1711        err = purgatorizeLayer_l(layer);
1712        if (err == NO_ERROR) {
1713            setTransactionFlags(eTransactionNeeded);
1714        }
1715    }
1716    return err;
1717}
1718
1719status_t SurfaceFlinger::onLayerDestroyed(const wp<LayerBaseClient>& layer)
1720{
1721    // called by ~ISurface() when all references are gone
1722    status_t err = NO_ERROR;
1723    sp<LayerBaseClient> l(layer.promote());
1724    if (l != NULL) {
1725        Mutex::Autolock _l(mStateLock);
1726        err = removeLayer_l(l);
1727        if (err == NAME_NOT_FOUND) {
1728            // The surface wasn't in the current list, which means it was
1729            // removed already, which means it is in the purgatory,
1730            // and need to be removed from there.
1731            ssize_t idx = mLayerPurgatory.remove(l);
1732            ALOGE_IF(idx < 0,
1733                    "layer=%p is not in the purgatory list", l.get());
1734        }
1735        ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
1736                "error removing layer=%p (%s)", l.get(), strerror(-err));
1737    }
1738    return err;
1739}
1740
1741// ---------------------------------------------------------------------------
1742
1743void SurfaceFlinger::onScreenAcquired() {
1744    ALOGD("Screen about to return, flinger = %p", this);
1745    sp<const DisplayDevice> hw(getDefaultDisplayDevice()); // XXX: this should be per DisplayDevice
1746    getHwComposer().acquire();
1747    hw->acquireScreen();
1748    mEventThread->onScreenAcquired();
1749    mVisibleRegionsDirty = true;
1750    repaintEverything();
1751}
1752
1753void SurfaceFlinger::onScreenReleased() {
1754    ALOGD("About to give-up screen, flinger = %p", this);
1755    sp<const DisplayDevice> hw(getDefaultDisplayDevice()); // XXX: this should be per DisplayDevice
1756    if (hw->isScreenAcquired()) {
1757        mEventThread->onScreenReleased();
1758        hw->releaseScreen();
1759        getHwComposer().release();
1760        // from this point on, SF will stop drawing
1761    }
1762}
1763
1764void SurfaceFlinger::unblank() {
1765    class MessageScreenAcquired : public MessageBase {
1766        SurfaceFlinger* flinger;
1767    public:
1768        MessageScreenAcquired(SurfaceFlinger* flinger) : flinger(flinger) { }
1769        virtual bool handler() {
1770            flinger->onScreenAcquired();
1771            return true;
1772        }
1773    };
1774    sp<MessageBase> msg = new MessageScreenAcquired(this);
1775    postMessageSync(msg);
1776}
1777
1778void SurfaceFlinger::blank() {
1779    class MessageScreenReleased : public MessageBase {
1780        SurfaceFlinger* flinger;
1781    public:
1782        MessageScreenReleased(SurfaceFlinger* flinger) : flinger(flinger) { }
1783        virtual bool handler() {
1784            flinger->onScreenReleased();
1785            return true;
1786        }
1787    };
1788    sp<MessageBase> msg = new MessageScreenReleased(this);
1789    postMessageSync(msg);
1790}
1791
1792// ---------------------------------------------------------------------------
1793
1794status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1795{
1796    const size_t SIZE = 4096;
1797    char buffer[SIZE];
1798    String8 result;
1799
1800    if (!PermissionCache::checkCallingPermission(sDump)) {
1801        snprintf(buffer, SIZE, "Permission Denial: "
1802                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1803                IPCThreadState::self()->getCallingPid(),
1804                IPCThreadState::self()->getCallingUid());
1805        result.append(buffer);
1806    } else {
1807        // Try to get the main lock, but don't insist if we can't
1808        // (this would indicate SF is stuck, but we want to be able to
1809        // print something in dumpsys).
1810        int retry = 3;
1811        while (mStateLock.tryLock()<0 && --retry>=0) {
1812            usleep(1000000);
1813        }
1814        const bool locked(retry >= 0);
1815        if (!locked) {
1816            snprintf(buffer, SIZE,
1817                    "SurfaceFlinger appears to be unresponsive, "
1818                    "dumping anyways (no locks held)\n");
1819            result.append(buffer);
1820        }
1821
1822        bool dumpAll = true;
1823        size_t index = 0;
1824        size_t numArgs = args.size();
1825        if (numArgs) {
1826            if ((index < numArgs) &&
1827                    (args[index] == String16("--list"))) {
1828                index++;
1829                listLayersLocked(args, index, result, buffer, SIZE);
1830                dumpAll = false;
1831            }
1832
1833            if ((index < numArgs) &&
1834                    (args[index] == String16("--latency"))) {
1835                index++;
1836                dumpStatsLocked(args, index, result, buffer, SIZE);
1837                dumpAll = false;
1838            }
1839
1840            if ((index < numArgs) &&
1841                    (args[index] == String16("--latency-clear"))) {
1842                index++;
1843                clearStatsLocked(args, index, result, buffer, SIZE);
1844                dumpAll = false;
1845            }
1846        }
1847
1848        if (dumpAll) {
1849            dumpAllLocked(result, buffer, SIZE);
1850        }
1851
1852        if (locked) {
1853            mStateLock.unlock();
1854        }
1855    }
1856    write(fd, result.string(), result.size());
1857    return NO_ERROR;
1858}
1859
1860void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
1861        String8& result, char* buffer, size_t SIZE) const
1862{
1863    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1864    const size_t count = currentLayers.size();
1865    for (size_t i=0 ; i<count ; i++) {
1866        const sp<LayerBase>& layer(currentLayers[i]);
1867        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1868        result.append(buffer);
1869    }
1870}
1871
1872void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
1873        String8& result, char* buffer, size_t SIZE) const
1874{
1875    String8 name;
1876    if (index < args.size()) {
1877        name = String8(args[index]);
1878        index++;
1879    }
1880
1881    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1882    const size_t count = currentLayers.size();
1883    for (size_t i=0 ; i<count ; i++) {
1884        const sp<LayerBase>& layer(currentLayers[i]);
1885        if (name.isEmpty()) {
1886            snprintf(buffer, SIZE, "%s\n", layer->getName().string());
1887            result.append(buffer);
1888        }
1889        if (name.isEmpty() || (name == layer->getName())) {
1890            layer->dumpStats(result, buffer, SIZE);
1891        }
1892    }
1893}
1894
1895void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
1896        String8& result, char* buffer, size_t SIZE) const
1897{
1898    String8 name;
1899    if (index < args.size()) {
1900        name = String8(args[index]);
1901        index++;
1902    }
1903
1904    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1905    const size_t count = currentLayers.size();
1906    for (size_t i=0 ; i<count ; i++) {
1907        const sp<LayerBase>& layer(currentLayers[i]);
1908        if (name.isEmpty() || (name == layer->getName())) {
1909            layer->clearStats();
1910        }
1911    }
1912}
1913
1914void SurfaceFlinger::dumpAllLocked(
1915        String8& result, char* buffer, size_t SIZE) const
1916{
1917    // figure out if we're stuck somewhere
1918    const nsecs_t now = systemTime();
1919    const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1920    const nsecs_t inTransaction(mDebugInTransaction);
1921    nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1922    nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1923
1924    /*
1925     * Dump the visible layer list
1926     */
1927    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1928    const size_t count = currentLayers.size();
1929    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1930    result.append(buffer);
1931    for (size_t i=0 ; i<count ; i++) {
1932        const sp<LayerBase>& layer(currentLayers[i]);
1933        layer->dump(result, buffer, SIZE);
1934    }
1935
1936    /*
1937     * Dump the layers in the purgatory
1938     */
1939
1940    const size_t purgatorySize = mLayerPurgatory.size();
1941    snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1942    result.append(buffer);
1943    for (size_t i=0 ; i<purgatorySize ; i++) {
1944        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1945        layer->shortDump(result, buffer, SIZE);
1946    }
1947
1948    /*
1949     * Dump SurfaceFlinger global state
1950     */
1951
1952    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1953    result.append(buffer);
1954
1955    HWComposer& hwc(getHwComposer());
1956    sp<const DisplayDevice> hw(getDefaultDisplayDevice());
1957    const GLExtensions& extensions(GLExtensions::getInstance());
1958    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1959            extensions.getVendor(),
1960            extensions.getRenderer(),
1961            extensions.getVersion());
1962    result.append(buffer);
1963
1964    snprintf(buffer, SIZE, "EGL : %s\n",
1965            eglQueryString(mEGLDisplay, EGL_VERSION_HW_ANDROID));
1966    result.append(buffer);
1967
1968    snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1969    result.append(buffer);
1970
1971    hw->undefinedRegion.dump(result, "undefinedRegion");
1972    snprintf(buffer, SIZE,
1973            "  orientation=%d, canDraw=%d\n",
1974            hw->getOrientation(), hw->canDraw());
1975    result.append(buffer);
1976    snprintf(buffer, SIZE,
1977            "  last eglSwapBuffers() time: %f us\n"
1978            "  last transaction time     : %f us\n"
1979            "  transaction-flags         : %08x\n"
1980            "  refresh-rate              : %f fps\n"
1981            "  x-dpi                     : %f\n"
1982            "  y-dpi                     : %f\n",
1983            mLastSwapBufferTime/1000.0,
1984            mLastTransactionTime/1000.0,
1985            mTransactionFlags,
1986            1e9 / hwc.getRefreshPeriod(),
1987            hwc.getDpiX(),
1988            hwc.getDpiY());
1989    result.append(buffer);
1990
1991    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1992            inSwapBuffersDuration/1000.0);
1993    result.append(buffer);
1994
1995    snprintf(buffer, SIZE, "  transaction time: %f us\n",
1996            inTransactionDuration/1000.0);
1997    result.append(buffer);
1998
1999    /*
2000     * VSYNC state
2001     */
2002    mEventThread->dump(result, buffer, SIZE);
2003
2004    /*
2005     * Dump HWComposer state
2006     */
2007    snprintf(buffer, SIZE, "h/w composer state:\n");
2008    result.append(buffer);
2009    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
2010            hwc.initCheck()==NO_ERROR ? "present" : "not present",
2011                    (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
2012    result.append(buffer);
2013    hwc.dump(result, buffer, SIZE, hw->getVisibleLayersSortedByZ());
2014
2015    /*
2016     * Dump gralloc state
2017     */
2018    const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
2019    alloc.dump(result);
2020    hw->dump(result);
2021}
2022
2023status_t SurfaceFlinger::onTransact(
2024    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2025{
2026    switch (code) {
2027        case CREATE_CONNECTION:
2028        case SET_TRANSACTION_STATE:
2029        case BOOT_FINISHED:
2030        case BLANK:
2031        case UNBLANK:
2032        {
2033            // codes that require permission check
2034            IPCThreadState* ipc = IPCThreadState::self();
2035            const int pid = ipc->getCallingPid();
2036            const int uid = ipc->getCallingUid();
2037            if ((uid != AID_GRAPHICS) &&
2038                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
2039                ALOGE("Permission Denial: "
2040                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
2041                return PERMISSION_DENIED;
2042            }
2043            break;
2044        }
2045        case CAPTURE_SCREEN:
2046        {
2047            // codes that require permission check
2048            IPCThreadState* ipc = IPCThreadState::self();
2049            const int pid = ipc->getCallingPid();
2050            const int uid = ipc->getCallingUid();
2051            if ((uid != AID_GRAPHICS) &&
2052                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
2053                ALOGE("Permission Denial: "
2054                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
2055                return PERMISSION_DENIED;
2056            }
2057            break;
2058        }
2059    }
2060
2061    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
2062    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
2063        CHECK_INTERFACE(ISurfaceComposer, data, reply);
2064        if (CC_UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
2065            IPCThreadState* ipc = IPCThreadState::self();
2066            const int pid = ipc->getCallingPid();
2067            const int uid = ipc->getCallingUid();
2068            ALOGE("Permission Denial: "
2069                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
2070            return PERMISSION_DENIED;
2071        }
2072        int n;
2073        switch (code) {
2074            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
2075            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
2076                return NO_ERROR;
2077            case 1002:  // SHOW_UPDATES
2078                n = data.readInt32();
2079                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
2080                invalidateHwcGeometry();
2081                repaintEverything();
2082                return NO_ERROR;
2083            case 1004:{ // repaint everything
2084                repaintEverything();
2085                return NO_ERROR;
2086            }
2087            case 1005:{ // force transaction
2088                setTransactionFlags(
2089                        eTransactionNeeded|
2090                        eDisplayTransactionNeeded|
2091                        eTraversalNeeded);
2092                return NO_ERROR;
2093            }
2094            case 1006:{ // send empty update
2095                signalRefresh();
2096                return NO_ERROR;
2097            }
2098            case 1008:  // toggle use of hw composer
2099                n = data.readInt32();
2100                mDebugDisableHWC = n ? 1 : 0;
2101                invalidateHwcGeometry();
2102                repaintEverything();
2103                return NO_ERROR;
2104            case 1009:  // toggle use of transform hint
2105                n = data.readInt32();
2106                mDebugDisableTransformHint = n ? 1 : 0;
2107                invalidateHwcGeometry();
2108                repaintEverything();
2109                return NO_ERROR;
2110            case 1010:  // interrogate.
2111                reply->writeInt32(0);
2112                reply->writeInt32(0);
2113                reply->writeInt32(mDebugRegion);
2114                reply->writeInt32(0);
2115                reply->writeInt32(mDebugDisableHWC);
2116                return NO_ERROR;
2117            case 1013: {
2118                Mutex::Autolock _l(mStateLock);
2119                sp<const DisplayDevice> hw(getDefaultDisplayDevice());
2120                reply->writeInt32(hw->getPageFlipCount());
2121            }
2122            return NO_ERROR;
2123        }
2124    }
2125    return err;
2126}
2127
2128void SurfaceFlinger::repaintEverything() {
2129    android_atomic_or(1, &mRepaintEverything);
2130    signalTransaction();
2131}
2132
2133// ---------------------------------------------------------------------------
2134
2135status_t SurfaceFlinger::renderScreenToTexture(DisplayID dpy,
2136        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
2137{
2138    Mutex::Autolock _l(mStateLock);
2139    return renderScreenToTextureLocked(dpy, textureName, uOut, vOut);
2140}
2141
2142status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
2143        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
2144{
2145    ATRACE_CALL();
2146
2147    if (!GLExtensions::getInstance().haveFramebufferObject())
2148        return INVALID_OPERATION;
2149
2150    // get screen geometry
2151    sp<const DisplayDevice> hw(getDisplayDevice(dpy));
2152    const uint32_t hw_w = hw->getWidth();
2153    const uint32_t hw_h = hw->getHeight();
2154    GLfloat u = 1;
2155    GLfloat v = 1;
2156
2157    // make sure to clear all GL error flags
2158    while ( glGetError() != GL_NO_ERROR ) ;
2159
2160    // create a FBO
2161    GLuint name, tname;
2162    glGenTextures(1, &tname);
2163    glBindTexture(GL_TEXTURE_2D, tname);
2164    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2165    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2166    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
2167            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
2168    if (glGetError() != GL_NO_ERROR) {
2169        while ( glGetError() != GL_NO_ERROR ) ;
2170        GLint tw = (2 << (31 - clz(hw_w)));
2171        GLint th = (2 << (31 - clz(hw_h)));
2172        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
2173                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
2174        u = GLfloat(hw_w) / tw;
2175        v = GLfloat(hw_h) / th;
2176    }
2177    glGenFramebuffersOES(1, &name);
2178    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2179    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
2180            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
2181
2182    // redraw the screen entirely...
2183    glDisable(GL_TEXTURE_EXTERNAL_OES);
2184    glDisable(GL_TEXTURE_2D);
2185    glClearColor(0,0,0,1);
2186    glClear(GL_COLOR_BUFFER_BIT);
2187    glMatrixMode(GL_MODELVIEW);
2188    glLoadIdentity();
2189    const Vector< sp<LayerBase> >& layers(hw->getVisibleLayersSortedByZ());
2190    const size_t count = layers.size();
2191    for (size_t i=0 ; i<count ; ++i) {
2192        const sp<LayerBase>& layer(layers[i]);
2193        layer->draw(hw);
2194    }
2195
2196    hw->compositionComplete();
2197
2198    // back to main framebuffer
2199    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2200    glDeleteFramebuffersOES(1, &name);
2201
2202    *textureName = tname;
2203    *uOut = u;
2204    *vOut = v;
2205    return NO_ERROR;
2206}
2207
2208// ---------------------------------------------------------------------------
2209
2210status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2211        sp<IMemoryHeap>* heap,
2212        uint32_t* w, uint32_t* h, PixelFormat* f,
2213        uint32_t sw, uint32_t sh,
2214        uint32_t minLayerZ, uint32_t maxLayerZ)
2215{
2216    ATRACE_CALL();
2217
2218    status_t result = PERMISSION_DENIED;
2219
2220    // only one display supported for now
2221    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT)) {
2222        ALOGE("invalid display %d", dpy);
2223        return BAD_VALUE;
2224    }
2225
2226    if (!GLExtensions::getInstance().haveFramebufferObject()) {
2227        return INVALID_OPERATION;
2228    }
2229
2230    // get screen geometry
2231    sp<const DisplayDevice> hw(getDisplayDevice(dpy));
2232    const uint32_t hw_w = hw->getWidth();
2233    const uint32_t hw_h = hw->getHeight();
2234
2235    // if we have secure windows on this display, never allow the screen capture
2236    if (hw->getSecureLayerVisible()) {
2237        ALOGW("FB is protected: PERMISSION_DENIED");
2238        return PERMISSION_DENIED;
2239    }
2240
2241    if ((sw > hw_w) || (sh > hw_h)) {
2242        ALOGE("size mismatch (%d, %d) > (%d, %d)", sw, sh, hw_w, hw_h);
2243        return BAD_VALUE;
2244    }
2245
2246    sw = (!sw) ? hw_w : sw;
2247    sh = (!sh) ? hw_h : sh;
2248    const size_t size = sw * sh * 4;
2249    const bool filtering = sw != hw_w || sh != hw_h;
2250
2251//    ALOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2252//            sw, sh, minLayerZ, maxLayerZ);
2253
2254    // make sure to clear all GL error flags
2255    while ( glGetError() != GL_NO_ERROR ) ;
2256
2257    // create a FBO
2258    GLuint name, tname;
2259    glGenRenderbuffersOES(1, &tname);
2260    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2261    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2262
2263    glGenFramebuffersOES(1, &name);
2264    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2265    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2266            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2267
2268    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2269
2270    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2271
2272        // invert everything, b/c glReadPixel() below will invert the FB
2273        glViewport(0, 0, sw, sh);
2274        glMatrixMode(GL_PROJECTION);
2275        glPushMatrix();
2276        glLoadIdentity();
2277        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2278        glMatrixMode(GL_MODELVIEW);
2279
2280        // redraw the screen entirely...
2281        glClearColor(0,0,0,1);
2282        glClear(GL_COLOR_BUFFER_BIT);
2283
2284        const LayerVector& layers(mDrawingState.layersSortedByZ);
2285        const size_t count = layers.size();
2286        for (size_t i=0 ; i<count ; ++i) {
2287            const sp<LayerBase>& layer(layers[i]);
2288            const uint32_t flags = layer->drawingState().flags;
2289            if (!(flags & layer_state_t::eLayerHidden)) {
2290                const uint32_t z = layer->drawingState().z;
2291                if (z >= minLayerZ && z <= maxLayerZ) {
2292                    if (filtering) layer->setFiltering(true);
2293                    layer->draw(hw);
2294                    if (filtering) layer->setFiltering(false);
2295                }
2296            }
2297        }
2298
2299        // check for errors and return screen capture
2300        if (glGetError() != GL_NO_ERROR) {
2301            // error while rendering
2302            result = INVALID_OPERATION;
2303        } else {
2304            // allocate shared memory large enough to hold the
2305            // screen capture
2306            sp<MemoryHeapBase> base(
2307                    new MemoryHeapBase(size, 0, "screen-capture") );
2308            void* const ptr = base->getBase();
2309            if (ptr) {
2310                // capture the screen with glReadPixels()
2311                ScopedTrace _t(ATRACE_TAG, "glReadPixels");
2312                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2313                if (glGetError() == GL_NO_ERROR) {
2314                    *heap = base;
2315                    *w = sw;
2316                    *h = sh;
2317                    *f = PIXEL_FORMAT_RGBA_8888;
2318                    result = NO_ERROR;
2319                }
2320            } else {
2321                result = NO_MEMORY;
2322            }
2323        }
2324        glViewport(0, 0, hw_w, hw_h);
2325        glMatrixMode(GL_PROJECTION);
2326        glPopMatrix();
2327        glMatrixMode(GL_MODELVIEW);
2328    } else {
2329        result = BAD_VALUE;
2330    }
2331
2332    // release FBO resources
2333    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2334    glDeleteRenderbuffersOES(1, &tname);
2335    glDeleteFramebuffersOES(1, &name);
2336
2337    hw->compositionComplete();
2338
2339//    ALOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2340
2341    return result;
2342}
2343
2344
2345status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2346        sp<IMemoryHeap>* heap,
2347        uint32_t* width, uint32_t* height, PixelFormat* format,
2348        uint32_t sw, uint32_t sh,
2349        uint32_t minLayerZ, uint32_t maxLayerZ)
2350{
2351    // only one display supported for now
2352    if (CC_UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2353        return BAD_VALUE;
2354
2355    if (!GLExtensions::getInstance().haveFramebufferObject())
2356        return INVALID_OPERATION;
2357
2358    class MessageCaptureScreen : public MessageBase {
2359        SurfaceFlinger* flinger;
2360        DisplayID dpy;
2361        sp<IMemoryHeap>* heap;
2362        uint32_t* w;
2363        uint32_t* h;
2364        PixelFormat* f;
2365        uint32_t sw;
2366        uint32_t sh;
2367        uint32_t minLayerZ;
2368        uint32_t maxLayerZ;
2369        status_t result;
2370    public:
2371        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2372                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2373                uint32_t sw, uint32_t sh,
2374                uint32_t minLayerZ, uint32_t maxLayerZ)
2375            : flinger(flinger), dpy(dpy),
2376              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2377              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2378              result(PERMISSION_DENIED)
2379        {
2380        }
2381        status_t getResult() const {
2382            return result;
2383        }
2384        virtual bool handler() {
2385            Mutex::Autolock _l(flinger->mStateLock);
2386            result = flinger->captureScreenImplLocked(dpy,
2387                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2388            return true;
2389        }
2390    };
2391
2392    sp<MessageBase> msg = new MessageCaptureScreen(this,
2393            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2394    status_t res = postMessageSync(msg);
2395    if (res == NO_ERROR) {
2396        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2397    }
2398    return res;
2399}
2400
2401// ---------------------------------------------------------------------------
2402
2403SurfaceFlinger::LayerVector::LayerVector() {
2404}
2405
2406SurfaceFlinger::LayerVector::LayerVector(const LayerVector& rhs)
2407    : SortedVector<sp<LayerBase> >(rhs) {
2408}
2409
2410int SurfaceFlinger::LayerVector::do_compare(const void* lhs,
2411    const void* rhs) const
2412{
2413    // sort layers per layer-stack, then by z-order and finally by sequence
2414    const sp<LayerBase>& l(*reinterpret_cast<const sp<LayerBase>*>(lhs));
2415    const sp<LayerBase>& r(*reinterpret_cast<const sp<LayerBase>*>(rhs));
2416
2417    uint32_t ls = l->currentState().layerStack;
2418    uint32_t rs = r->currentState().layerStack;
2419    if (ls != rs)
2420        return ls - rs;
2421
2422    uint32_t lz = l->currentState().z;
2423    uint32_t rz = r->currentState().z;
2424    if (lz != rz)
2425        return lz - rz;
2426
2427    return l->sequence - r->sequence;
2428}
2429
2430// ---------------------------------------------------------------------------
2431
2432SurfaceFlinger::DisplayDeviceState::DisplayDeviceState() : id(-1) {
2433}
2434
2435SurfaceFlinger::DisplayDeviceState::DisplayDeviceState(int32_t id)
2436    : id(id), layerStack(0), orientation(0) {
2437}
2438
2439// ---------------------------------------------------------------------------
2440
2441GraphicBufferAlloc::GraphicBufferAlloc() {}
2442
2443GraphicBufferAlloc::~GraphicBufferAlloc() {}
2444
2445sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2446        PixelFormat format, uint32_t usage, status_t* error) {
2447    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2448    status_t err = graphicBuffer->initCheck();
2449    *error = err;
2450    if (err != 0 || graphicBuffer->handle == 0) {
2451        if (err == NO_MEMORY) {
2452            GraphicBuffer::dumpAllocationsToSystemLog();
2453        }
2454        ALOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2455             "failed (%s), handle=%p",
2456                w, h, strerror(-err), graphicBuffer->handle);
2457        return 0;
2458    }
2459    return graphicBuffer;
2460}
2461
2462// ---------------------------------------------------------------------------
2463
2464}; // namespace android
2465