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 LOG_NDEBUG 0
18#define LOG_TAG "BootAnimation"
19
20#include <stdint.h>
21#include <sys/types.h>
22#include <math.h>
23#include <fcntl.h>
24#include <utils/misc.h>
25#include <signal.h>
26
27#include <cutils/properties.h>
28
29#include <androidfw/AssetManager.h>
30#include <binder/IPCThreadState.h>
31#include <utils/Atomic.h>
32#include <utils/Errors.h>
33#include <utils/Log.h>
34
35#include <ui/PixelFormat.h>
36#include <ui/Rect.h>
37#include <ui/Region.h>
38#include <ui/DisplayInfo.h>
39
40#include <gui/ISurfaceComposer.h>
41#include <gui/Surface.h>
42#include <gui/SurfaceComposerClient.h>
43
44#include <SkBitmap.h>
45#include <SkStream.h>
46#include <SkImageDecoder.h>
47
48#include <GLES/gl.h>
49#include <GLES/glext.h>
50#include <EGL/eglext.h>
51
52#include "BootAnimation.h"
53#include "AudioPlayer.h"
54
55#define OEM_BOOTANIMATION_FILE "/oem/media/bootanimation.zip"
56#define SYSTEM_BOOTANIMATION_FILE "/system/media/bootanimation.zip"
57#define SYSTEM_ENCRYPTED_BOOTANIMATION_FILE "/system/media/bootanimation-encrypted.zip"
58#define EXIT_PROP_NAME "service.bootanim.exit"
59
60extern "C" int clock_nanosleep(clockid_t clock_id, int flags,
61                           const struct timespec *request,
62                           struct timespec *remain);
63
64namespace android {
65
66static const int ANIM_ENTRY_NAME_MAX = 256;
67
68// ---------------------------------------------------------------------------
69
70BootAnimation::BootAnimation() : Thread(false), mZip(NULL)
71{
72    mSession = new SurfaceComposerClient();
73}
74
75BootAnimation::~BootAnimation() {
76    if (mZip != NULL) {
77        delete mZip;
78    }
79}
80
81void BootAnimation::onFirstRef() {
82    status_t err = mSession->linkToComposerDeath(this);
83    ALOGE_IF(err, "linkToComposerDeath failed (%s) ", strerror(-err));
84    if (err == NO_ERROR) {
85        run("BootAnimation", PRIORITY_DISPLAY);
86    }
87}
88
89sp<SurfaceComposerClient> BootAnimation::session() const {
90    return mSession;
91}
92
93
94void BootAnimation::binderDied(const wp<IBinder>&)
95{
96    // woah, surfaceflinger died!
97    ALOGD("SurfaceFlinger died, exiting...");
98
99    // calling requestExit() is not enough here because the Surface code
100    // might be blocked on a condition variable that will never be updated.
101    kill( getpid(), SIGKILL );
102    requestExit();
103    if (mAudioPlayer != NULL) {
104        mAudioPlayer->requestExit();
105    }
106}
107
108status_t BootAnimation::initTexture(Texture* texture, AssetManager& assets,
109        const char* name) {
110    Asset* asset = assets.open(name, Asset::ACCESS_BUFFER);
111    if (!asset)
112        return NO_INIT;
113    SkBitmap bitmap;
114    SkImageDecoder::DecodeMemory(asset->getBuffer(false), asset->getLength(),
115            &bitmap, kUnknown_SkColorType, SkImageDecoder::kDecodePixels_Mode);
116    asset->close();
117    delete asset;
118
119    // ensure we can call getPixels(). No need to call unlock, since the
120    // bitmap will go out of scope when we return from this method.
121    bitmap.lockPixels();
122
123    const int w = bitmap.width();
124    const int h = bitmap.height();
125    const void* p = bitmap.getPixels();
126
127    GLint crop[4] = { 0, h, w, -h };
128    texture->w = w;
129    texture->h = h;
130
131    glGenTextures(1, &texture->name);
132    glBindTexture(GL_TEXTURE_2D, texture->name);
133
134    switch (bitmap.colorType()) {
135        case kAlpha_8_SkColorType:
136            glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, w, h, 0, GL_ALPHA,
137                    GL_UNSIGNED_BYTE, p);
138            break;
139        case kARGB_4444_SkColorType:
140            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA,
141                    GL_UNSIGNED_SHORT_4_4_4_4, p);
142            break;
143        case kN32_SkColorType:
144            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA,
145                    GL_UNSIGNED_BYTE, p);
146            break;
147        case kRGB_565_SkColorType:
148            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB,
149                    GL_UNSIGNED_SHORT_5_6_5, p);
150            break;
151        default:
152            break;
153    }
154
155    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
156    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
157    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
158    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
159    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
160    return NO_ERROR;
161}
162
163status_t BootAnimation::initTexture(const Animation::Frame& frame)
164{
165    //StopWatch watch("blah");
166
167    SkBitmap bitmap;
168    SkMemoryStream  stream(frame.map->getDataPtr(), frame.map->getDataLength());
169    SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
170    if (codec) {
171        codec->setDitherImage(false);
172        codec->decode(&stream, &bitmap,
173                kN32_SkColorType,
174                SkImageDecoder::kDecodePixels_Mode);
175        delete codec;
176    }
177
178    // FileMap memory is never released until application exit.
179    // Release it now as the texture is already loaded and the memory used for
180    // the packed resource can be released.
181    frame.map->release();
182
183    // ensure we can call getPixels(). No need to call unlock, since the
184    // bitmap will go out of scope when we return from this method.
185    bitmap.lockPixels();
186
187    const int w = bitmap.width();
188    const int h = bitmap.height();
189    const void* p = bitmap.getPixels();
190
191    GLint crop[4] = { 0, h, w, -h };
192    int tw = 1 << (31 - __builtin_clz(w));
193    int th = 1 << (31 - __builtin_clz(h));
194    if (tw < w) tw <<= 1;
195    if (th < h) th <<= 1;
196
197    switch (bitmap.colorType()) {
198        case kN32_SkColorType:
199            if (tw != w || th != h) {
200                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
201                        GL_UNSIGNED_BYTE, 0);
202                glTexSubImage2D(GL_TEXTURE_2D, 0,
203                        0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, p);
204            } else {
205                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
206                        GL_UNSIGNED_BYTE, p);
207            }
208            break;
209
210        case kRGB_565_SkColorType:
211            if (tw != w || th != h) {
212                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
213                        GL_UNSIGNED_SHORT_5_6_5, 0);
214                glTexSubImage2D(GL_TEXTURE_2D, 0,
215                        0, 0, w, h, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, p);
216            } else {
217                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
218                        GL_UNSIGNED_SHORT_5_6_5, p);
219            }
220            break;
221        default:
222            break;
223    }
224
225    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
226
227    return NO_ERROR;
228}
229
230status_t BootAnimation::readyToRun() {
231    mAssets.addDefaultAssets();
232
233    sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
234            ISurfaceComposer::eDisplayIdMain));
235    DisplayInfo dinfo;
236    status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);
237    if (status)
238        return -1;
239
240    // create the native surface
241    sp<SurfaceControl> control = session()->createSurface(String8("BootAnimation"),
242            dinfo.w, dinfo.h, PIXEL_FORMAT_RGB_565);
243
244    SurfaceComposerClient::openGlobalTransaction();
245    control->setLayer(0x40000000);
246    SurfaceComposerClient::closeGlobalTransaction();
247
248    sp<Surface> s = control->getSurface();
249
250    // initialize opengl and egl
251    const EGLint attribs[] = {
252            EGL_RED_SIZE,   8,
253            EGL_GREEN_SIZE, 8,
254            EGL_BLUE_SIZE,  8,
255            EGL_DEPTH_SIZE, 0,
256            EGL_NONE
257    };
258    EGLint w, h, dummy;
259    EGLint numConfigs;
260    EGLConfig config;
261    EGLSurface surface;
262    EGLContext context;
263
264    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
265
266    eglInitialize(display, 0, 0);
267    eglChooseConfig(display, attribs, &config, 1, &numConfigs);
268    surface = eglCreateWindowSurface(display, config, s.get(), NULL);
269    context = eglCreateContext(display, config, NULL, NULL);
270    eglQuerySurface(display, surface, EGL_WIDTH, &w);
271    eglQuerySurface(display, surface, EGL_HEIGHT, &h);
272
273    if (eglMakeCurrent(display, surface, surface, context) == EGL_FALSE)
274        return NO_INIT;
275
276    mDisplay = display;
277    mContext = context;
278    mSurface = surface;
279    mWidth = w;
280    mHeight = h;
281    mFlingerSurfaceControl = control;
282    mFlingerSurface = s;
283
284    // If the device has encryption turned on or is in process
285    // of being encrypted we show the encrypted boot animation.
286    char decrypt[PROPERTY_VALUE_MAX];
287    property_get("vold.decrypt", decrypt, "");
288
289    bool encryptedAnimation = atoi(decrypt) != 0 || !strcmp("trigger_restart_min_framework", decrypt);
290
291    ZipFileRO* zipFile = NULL;
292    if ((encryptedAnimation &&
293            (access(SYSTEM_ENCRYPTED_BOOTANIMATION_FILE, R_OK) == 0) &&
294            ((zipFile = ZipFileRO::open(SYSTEM_ENCRYPTED_BOOTANIMATION_FILE)) != NULL)) ||
295
296            ((access(OEM_BOOTANIMATION_FILE, R_OK) == 0) &&
297            ((zipFile = ZipFileRO::open(OEM_BOOTANIMATION_FILE)) != NULL)) ||
298
299            ((access(SYSTEM_BOOTANIMATION_FILE, R_OK) == 0) &&
300            ((zipFile = ZipFileRO::open(SYSTEM_BOOTANIMATION_FILE)) != NULL))) {
301        mZip = zipFile;
302    }
303
304    return NO_ERROR;
305}
306
307bool BootAnimation::threadLoop()
308{
309    bool r;
310    // We have no bootanimation file, so we use the stock android logo
311    // animation.
312    if (mZip == NULL) {
313        r = android();
314    } else {
315        r = movie();
316    }
317
318    eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
319    eglDestroyContext(mDisplay, mContext);
320    eglDestroySurface(mDisplay, mSurface);
321    mFlingerSurface.clear();
322    mFlingerSurfaceControl.clear();
323    eglTerminate(mDisplay);
324    IPCThreadState::self()->stopProcess();
325    return r;
326}
327
328bool BootAnimation::android()
329{
330    initTexture(&mAndroid[0], mAssets, "images/android-logo-mask.png");
331    initTexture(&mAndroid[1], mAssets, "images/android-logo-shine.png");
332
333    // clear screen
334    glShadeModel(GL_FLAT);
335    glDisable(GL_DITHER);
336    glDisable(GL_SCISSOR_TEST);
337    glClearColor(0,0,0,1);
338    glClear(GL_COLOR_BUFFER_BIT);
339    eglSwapBuffers(mDisplay, mSurface);
340
341    glEnable(GL_TEXTURE_2D);
342    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
343
344    const GLint xc = (mWidth  - mAndroid[0].w) / 2;
345    const GLint yc = (mHeight - mAndroid[0].h) / 2;
346    const Rect updateRect(xc, yc, xc + mAndroid[0].w, yc + mAndroid[0].h);
347
348    glScissor(updateRect.left, mHeight - updateRect.bottom, updateRect.width(),
349            updateRect.height());
350
351    // Blend state
352    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
353    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
354
355    const nsecs_t startTime = systemTime();
356    do {
357        nsecs_t now = systemTime();
358        double time = now - startTime;
359        float t = 4.0f * float(time / us2ns(16667)) / mAndroid[1].w;
360        GLint offset = (1 - (t - floorf(t))) * mAndroid[1].w;
361        GLint x = xc - offset;
362
363        glDisable(GL_SCISSOR_TEST);
364        glClear(GL_COLOR_BUFFER_BIT);
365
366        glEnable(GL_SCISSOR_TEST);
367        glDisable(GL_BLEND);
368        glBindTexture(GL_TEXTURE_2D, mAndroid[1].name);
369        glDrawTexiOES(x,                 yc, 0, mAndroid[1].w, mAndroid[1].h);
370        glDrawTexiOES(x + mAndroid[1].w, yc, 0, mAndroid[1].w, mAndroid[1].h);
371
372        glEnable(GL_BLEND);
373        glBindTexture(GL_TEXTURE_2D, mAndroid[0].name);
374        glDrawTexiOES(xc, yc, 0, mAndroid[0].w, mAndroid[0].h);
375
376        EGLBoolean res = eglSwapBuffers(mDisplay, mSurface);
377        if (res == EGL_FALSE)
378            break;
379
380        // 12fps: don't animate too fast to preserve CPU
381        const nsecs_t sleepTime = 83333 - ns2us(systemTime() - now);
382        if (sleepTime > 0)
383            usleep(sleepTime);
384
385        checkExit();
386    } while (!exitPending());
387
388    glDeleteTextures(1, &mAndroid[0].name);
389    glDeleteTextures(1, &mAndroid[1].name);
390    return false;
391}
392
393
394void BootAnimation::checkExit() {
395    // Allow surface flinger to gracefully request shutdown
396    char value[PROPERTY_VALUE_MAX];
397    property_get(EXIT_PROP_NAME, value, "0");
398    int exitnow = atoi(value);
399    if (exitnow) {
400        requestExit();
401        if (mAudioPlayer != NULL) {
402            mAudioPlayer->requestExit();
403        }
404    }
405}
406
407// Parse a color represented as an HTML-style 'RRGGBB' string: each pair of
408// characters in str is a hex number in [0, 255], which are converted to
409// floating point values in the range [0.0, 1.0] and placed in the
410// corresponding elements of color.
411//
412// If the input string isn't valid, parseColor returns false and color is
413// left unchanged.
414static bool parseColor(const char str[7], float color[3]) {
415    float tmpColor[3];
416    for (int i = 0; i < 3; i++) {
417        int val = 0;
418        for (int j = 0; j < 2; j++) {
419            val *= 16;
420            char c = str[2*i + j];
421            if      (c >= '0' && c <= '9') val += c - '0';
422            else if (c >= 'A' && c <= 'F') val += (c - 'A') + 10;
423            else if (c >= 'a' && c <= 'f') val += (c - 'a') + 10;
424            else                           return false;
425        }
426        tmpColor[i] = static_cast<float>(val) / 255.0f;
427    }
428    memcpy(color, tmpColor, sizeof(tmpColor));
429    return true;
430}
431
432bool BootAnimation::readFile(const char* name, String8& outString)
433{
434    ZipEntryRO entry = mZip->findEntryByName(name);
435    ALOGE_IF(!entry, "couldn't find %s", name);
436    if (!entry) {
437        return false;
438    }
439
440    FileMap* entryMap = mZip->createEntryFileMap(entry);
441    mZip->releaseEntry(entry);
442    ALOGE_IF(!entryMap, "entryMap is null");
443    if (!entryMap) {
444        return false;
445    }
446
447    outString.setTo((char const*)entryMap->getDataPtr(), entryMap->getDataLength());
448    entryMap->release();
449    return true;
450}
451
452bool BootAnimation::movie()
453{
454    String8 desString;
455
456    if (!readFile("desc.txt", desString)) {
457        return false;
458    }
459    char const* s = desString.string();
460
461    // Create and initialize an AudioPlayer if we have an audio_conf.txt file
462    String8 audioConf;
463    if (readFile("audio_conf.txt", audioConf)) {
464        mAudioPlayer = new AudioPlayer;
465        if (!mAudioPlayer->init(audioConf.string())) {
466            ALOGE("mAudioPlayer.init failed");
467            mAudioPlayer = NULL;
468        }
469    }
470
471    Animation animation;
472
473    // Parse the description file
474    for (;;) {
475        const char* endl = strstr(s, "\n");
476        if (!endl) break;
477        String8 line(s, endl - s);
478        const char* l = line.string();
479        int fps, width, height, count, pause;
480        char path[ANIM_ENTRY_NAME_MAX];
481        char color[7] = "000000"; // default to black if unspecified
482
483        char pathType;
484        if (sscanf(l, "%d %d %d", &width, &height, &fps) == 3) {
485            // ALOGD("> w=%d, h=%d, fps=%d", width, height, fps);
486            animation.width = width;
487            animation.height = height;
488            animation.fps = fps;
489        }
490        else if (sscanf(l, " %c %d %d %s #%6s", &pathType, &count, &pause, path, color) >= 4) {
491            // ALOGD("> type=%c, count=%d, pause=%d, path=%s, color=%s", pathType, count, pause, path, color);
492            Animation::Part part;
493            part.playUntilComplete = pathType == 'c';
494            part.count = count;
495            part.pause = pause;
496            part.path = path;
497            part.audioFile = NULL;
498            if (!parseColor(color, part.backgroundColor)) {
499                ALOGE("> invalid color '#%s'", color);
500                part.backgroundColor[0] = 0.0f;
501                part.backgroundColor[1] = 0.0f;
502                part.backgroundColor[2] = 0.0f;
503            }
504            animation.parts.add(part);
505        }
506
507        s = ++endl;
508    }
509
510    // read all the data structures
511    const size_t pcount = animation.parts.size();
512    void *cookie = NULL;
513    if (!mZip->startIteration(&cookie)) {
514        return false;
515    }
516
517    ZipEntryRO entry;
518    char name[ANIM_ENTRY_NAME_MAX];
519    while ((entry = mZip->nextEntry(cookie)) != NULL) {
520        const int foundEntryName = mZip->getEntryFileName(entry, name, ANIM_ENTRY_NAME_MAX);
521        if (foundEntryName > ANIM_ENTRY_NAME_MAX || foundEntryName == -1) {
522            ALOGE("Error fetching entry file name");
523            continue;
524        }
525
526        const String8 entryName(name);
527        const String8 path(entryName.getPathDir());
528        const String8 leaf(entryName.getPathLeaf());
529        if (leaf.size() > 0) {
530            for (size_t j=0 ; j<pcount ; j++) {
531                if (path == animation.parts[j].path) {
532                    int method;
533                    // supports only stored png files
534                    if (mZip->getEntryInfo(entry, &method, NULL, NULL, NULL, NULL, NULL)) {
535                        if (method == ZipFileRO::kCompressStored) {
536                            FileMap* map = mZip->createEntryFileMap(entry);
537                            if (map) {
538                                Animation::Part& part(animation.parts.editItemAt(j));
539                                if (leaf == "audio.wav") {
540                                    // a part may have at most one audio file
541                                    part.audioFile = map;
542                                } else {
543                                    Animation::Frame frame;
544                                    frame.name = leaf;
545                                    frame.map = map;
546                                    part.frames.add(frame);
547                                }
548                            }
549                        }
550                    }
551                }
552            }
553        }
554    }
555
556    mZip->endIteration(cookie);
557
558    // clear screen
559    glShadeModel(GL_FLAT);
560    glDisable(GL_DITHER);
561    glDisable(GL_SCISSOR_TEST);
562    glDisable(GL_BLEND);
563    glClearColor(0,0,0,1);
564    glClear(GL_COLOR_BUFFER_BIT);
565
566    eglSwapBuffers(mDisplay, mSurface);
567
568    glBindTexture(GL_TEXTURE_2D, 0);
569    glEnable(GL_TEXTURE_2D);
570    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
571    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
572    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
573    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
574    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
575
576    const int xc = (mWidth - animation.width) / 2;
577    const int yc = ((mHeight - animation.height) / 2);
578    nsecs_t lastFrame = systemTime();
579    nsecs_t frameDuration = s2ns(1) / animation.fps;
580
581    Region clearReg(Rect(mWidth, mHeight));
582    clearReg.subtractSelf(Rect(xc, yc, xc+animation.width, yc+animation.height));
583
584    for (size_t i=0 ; i<pcount ; i++) {
585        const Animation::Part& part(animation.parts[i]);
586        const size_t fcount = part.frames.size();
587        glBindTexture(GL_TEXTURE_2D, 0);
588
589        for (int r=0 ; !part.count || r<part.count ; r++) {
590            // Exit any non playuntil complete parts immediately
591            if(exitPending() && !part.playUntilComplete)
592                break;
593
594            // only play audio file the first time we animate the part
595            if (r == 0 && mAudioPlayer != NULL && part.audioFile) {
596                mAudioPlayer->playFile(part.audioFile);
597            }
598
599            glClearColor(
600                    part.backgroundColor[0],
601                    part.backgroundColor[1],
602                    part.backgroundColor[2],
603                    1.0f);
604
605            for (size_t j=0 ; j<fcount && (!exitPending() || part.playUntilComplete) ; j++) {
606                const Animation::Frame& frame(part.frames[j]);
607                nsecs_t lastFrame = systemTime();
608
609                if (r > 0) {
610                    glBindTexture(GL_TEXTURE_2D, frame.tid);
611                } else {
612                    if (part.count != 1) {
613                        glGenTextures(1, &frame.tid);
614                        glBindTexture(GL_TEXTURE_2D, frame.tid);
615                        glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
616                        glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
617                    }
618                    initTexture(frame);
619                }
620
621                if (!clearReg.isEmpty()) {
622                    Region::const_iterator head(clearReg.begin());
623                    Region::const_iterator tail(clearReg.end());
624                    glEnable(GL_SCISSOR_TEST);
625                    while (head != tail) {
626                        const Rect& r(*head++);
627                        glScissor(r.left, mHeight - r.bottom,
628                                r.width(), r.height());
629                        glClear(GL_COLOR_BUFFER_BIT);
630                    }
631                    glDisable(GL_SCISSOR_TEST);
632                }
633                glDrawTexiOES(xc, yc, 0, animation.width, animation.height);
634                eglSwapBuffers(mDisplay, mSurface);
635
636                nsecs_t now = systemTime();
637                nsecs_t delay = frameDuration - (now - lastFrame);
638                //ALOGD("%lld, %lld", ns2ms(now - lastFrame), ns2ms(delay));
639                lastFrame = now;
640
641                if (delay > 0) {
642                    struct timespec spec;
643                    spec.tv_sec  = (now + delay) / 1000000000;
644                    spec.tv_nsec = (now + delay) % 1000000000;
645                    int err;
646                    do {
647                        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
648                    } while (err<0 && errno == EINTR);
649                }
650
651                checkExit();
652            }
653
654            usleep(part.pause * ns2us(frameDuration));
655
656            // For infinite parts, we've now played them at least once, so perhaps exit
657            if(exitPending() && !part.count)
658                break;
659        }
660
661        // free the textures for this part
662        if (part.count != 1) {
663            for (size_t j=0 ; j<fcount ; j++) {
664                const Animation::Frame& frame(part.frames[j]);
665                glDeleteTextures(1, &frame.tid);
666            }
667        }
668    }
669
670    return false;
671}
672
673// ---------------------------------------------------------------------------
674
675}
676; // namespace android
677