Graphics composition on android 4.3
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In Thread "SurfaceFlinger" of android 4.3
01-02 00:00:42.549: D/zzgratest(275): #00 pc 00029924 /system/lib/libsurfaceflinger.so (android::FramebufferSurface::onFrameAvailable()+23)
01-02 00:00:42.549: D/zzgratest(275): #01 pc 0001f1c4 /system/lib/libgui.so (android::BufferQueue::ProxyConsumerListener::onFrameAvailable()+15)
01-02 00:00:42.549: D/zzgratest(275): #02 pc 0001f0bc /system/lib/libgui.so (android::BufferQueue::queueBuffer(int, android::IGraphicBufferProducer::QueueBufferInput const&, android::IGraphicBufferProducer::QueueBufferOutput*)+851)
01-02 00:00:42.549: D/zzgratest(275): #03 pc 000277dc /system/lib/libgui.so (android::Surface::queueBuffer(ANativeWindowBuffer*, int)+223)
01-02 00:00:42.549: D/zzgratest(275): #04 pc 0002644a /system/lib/libgui.so (android::Surface::hook_queueBuffer(ANativeWindow*, ANativeWindowBuffer*, int)+7)
01-02 00:00:42.549: D/zzgratest(275): #05 pc 00003478 /system/vendor/lib/egl/eglsubAndroid.so (SwapBuffers+312)
01-02 00:00:42.549: D/zzgratest(275): #06 pc 00012b0c /system/vendor/lib/egl/libEGL_adreno.so (qeglDrvAPI_eglSwapBuffers+1544)
01-02 00:00:42.549: D/zzgratest(275): #07 pc 00006c20 /system/vendor/lib/egl/libEGL_adreno.so (eglSwapBuffers+16)
01-02 00:00:42.549: D/zzgratest(275): #08 pc 0000fb1a /system/lib/libEGL.so (eglSwapBuffers+277)
01-02 00:00:42.549: D/zzgratest(275): #09 pc 0001d8c4 /system/lib/libsurfaceflinger.so (android::DisplayDevice::swapBuffers(android::HWComposer&) const+131)
01-02 00:00:42.549: D/zzgratest(275): #10 pc 0002334e /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::doDisplayComposition(android::sp<android::DisplayDevice const> const&, android::Region const&)+121)
01-02 00:00:42.549: D/zzgratest(275): #11 pc 00025884 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::doComposition()+95)
01-02 00:00:42.549: D/zzgratest(275): #12 pc 00025ae0 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::handleMessageRefresh()+47)
01-02 00:00:42.549: D/zzgratest(275): #13 pc 00026874 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::onMessageReceived(int)+63)
01-02 00:00:42.549: D/zzgratest(275): #14 pc 000150ea /system/lib/libutils.so (android::Looper::pollInner(int)+381)
01-02 00:00:42.549: D/zzgratest(275): #15 pc 000151ec /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+91)
01-02 00:00:42.549: D/zzgratest(275): #16 pc 00021cd8 /system/lib/libsurfaceflinger.so (android::MessageQueue::waitMessage()+35)
01-02 00:00:42.549: D/zzgratest(275): #17 pc 00022a68 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::threadLoop()+1)
01-02 00:00:42.549: D/zzgratest(275): #18 pc 00011a8a /system/lib/libutils.so (android::Thread::_threadLoop(void*)+213)
01-02 00:00:42.549: D/zzgratest(275): #19 pc 0001157e /system/lib/libutils.so
01-02 00:00:42.549: D/zzgratest(275): #20 pc 0000cba0 /system/lib/libc.so (__thread_entry+72)
01-02 00:00:42.549: D/zzgratest(275): #21 pc 0000cd1c /system/lib/libc.so (pthread_create+208)
SurfaceFlinger::doComposition()
-->doDisplayComposition()
//DisplayDevicce::PARTIAL_UPDATES NOTE
-->-->doComposeSurface()
-->-->-->HWComposer::hasGlesComposition()
//by check disp.hasFbComp
-->-->-->-->LayerBase::draw()
-->-->-->-->-->Layer::onDraw()
-->-->-->-->-->-->drawWithOpenGL()
-->-->-->HWComposer::hasHwcComposition()
//by check disp.hasOvComp
-->-->DisplayDevice->swapBuffers(getHwComposer()) // ** in doDisplayComposition
-->-->-->eglSwapBuffers()@libEGL.so // ** Swap buffers in EGLSurface, holding BufferQueue(USAGE_HW_FB) with consumer FrameBufferSurface.
-->-->-->-->eglSwapBuffers()@libEGL_adreno.so
-->-->-->-->-->qeglDrvAPI_eglSwapBuffers()@libEGL_adreno.so
-->-->-->-->-->-->SwapBuffers()@eglsubAndroid.so
-->-->-->-->-->-->-->Surface::hook_queueBuffer()
-->-->-->-->-->-->-->-->Surface::queueBuffer()
-->-->-->-->-->-->-->-->-->BufferQueue::queueBuffer()
-->-->-->-->-->-->-->-->-->-->BufferQueue::ProxyConsumerListener::onFrameAvailable()
-->-->-->-->-->-->-->-->-->-->-->FramebufferSurface::onFrameAvailable()
-->-->-->-->-->-->-->-->-->-->-->-->HWComposer::fbPost()
-->-->-->-->-->-->-->-->-->-->-->-->-->framebuffer_device_t::(*post)() = fb_post()
-->-->-->-->-->-->-->-->-->-->-->-->-->-->ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) // ** the framebuffer is swapped.
in DisplayDevice::readyToRun, Surface instance will be registered as egl's window surface. Surface includes FramebufferSurface's BufferQueue(USAGE_HW_FB|USAGE_HW_COMPOSER) and inherits from ANativeWindow. in Surface, ANativeWindow's hook function should be called by egl!!! Thus Surface's and its BufferQueue's queuebuffer()s will be called. Then BufferQueue's and its comsumer FramebufferSurface's onframeavailable will be called.
-->DisplayDevice::flip()
-->-->eglSetSwapRectangleANDROID() ************** I think should be 'set' the region..
-->-->-->-->DisplayDevice::onSwapBuffersCompleted() // ** callbacked by eglSwpaBuufers
-->-->-->-->-->Signal the Fence
-->postFramebuffer()
-->-->HWComposer::commit()
-->-->-->mHwc->set() that is hwc_set
-->-->-->-->MDPComp::draw()
-->-->-->-->-->MDPCompSplit::draw()
-->-->-->-->-->-->Overlay::queueBuffer
-->-->-->-->-->-->-->GenericPipe::queueBuffer()
-->-->-->-->-->-->-->-->MdpData::queueBuffer()
-->-->-->-->-->-->-->-->-->MdpData::play()
-->-->-->-->-->-->-->-->-->-->mdp_wrapper::play()
-->-->-->-->-->-->-->-->-->-->-->ioctl(MSMFB_OVERLAY_PLAY) // **start the layerMixer to composite, overlay the HWC_OVERLAY layer to framebuffer.
-->-->-->-->Overlay::displayCommit()
-->-->-->-->->Overlay::displayCommit()
-->-->-->-->->-->mdp_wrapper::displayCommit()
-->-->-->-->->-->-->ioctl(MSMFB_DISPLAY_COMMIT) // ** start DMA, transfer layerMixer output to DSI controller
FramebufferSurface no longer speaks directly to the FB HAL. Now
everything goes through HWComposer (which may or may not be
connected to a hardware composer).
120// Overrides ConsumerBase: onFrameAvailable(), does not call base class impl.
121void FramebufferSurface: onFrameAvailable() {
122 sp<GraphicBuffer> buf;
123 sp<Fence> acquireFence;
124 status_t err = nextBuffer(buf, acquireFence);
125 if (err != NO_ERROR) {
126 ALOGE("error latching nnext FramebufferSurface buffer: %s (%d)",
127 strerror(-err), err);
128 return;
129 }
130 err = mHwc.fbPost(mDisplayType, acquireFence, buf);
131 if (err != NO_ERROR) {
132 ALOGE("error posting framebuffer: %d", err);
133 }
134}
757int HWComposer::fbPost(int32_t id,
758 const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
759 if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
760 return setFramebufferTarget(id, acquireFence, buffer);
761 } else {
762 acquireFence->waitForever("HWComposer::fbPost");
763 return mFbDev->post(mFbDev, buffer->handle); // ** fb_post
764 }
765}
195void DisplayDevice::flip(const Region& dirty) const
196{
197 checkGLErrors();
198
199 EGLDisplay dpy = mDisplay;
200 EGLSurface surface = mSurface;
201
202#ifdef EGL_ANDROID_swap_rectangle
203 if (mFlags & SWAP_RECTANGLE) {
204 const Region newDirty(dirty.intersect(bounds()));
205 const Rect b(newDirty.getBounds());
206 eglSetSwapRectangleANDROID(dpy, surface,// *****
207 b.left, b.top, b.width(), b.height());
208 }
209#endif
210
211 mPageFlipCount++;
212}
Another ANativeWindow with same role of Class Surface(for USAGE_HW_FB) is FrameBufferNativeWindow used by QCom's "GL updater" thread.
GL updater will call this.
GL updater, call FrameBufferNativeWindow::queueBuffer ANativeWindow::dequeueBuffer in eglsubAndroid.so
Thread 3 (LWP 511):
#0 __ioctl () at bionic/libc/arch-arm/syscalls/__ioctl.S:10
#1 0x4028e070 in ioctl (fd=<optimized out>, request=17921) at bionic/libc/bionic/ioctl.c:41
#2 0x400eed38 in fb_post (dev=<optimized out>, buffer=0x4122ff80) at hardware/qcom/display/libgralloc/framebuffer.cpp:129
#3 0x4004ec5a in android::FramebufferNativeWindow::queueBuffer (window=0x4122f578, buffer=<optimized out>) at frameworks/native/libs/ui/FramebufferNativeWindow.cpp:304
#4 0x40423da4 in updater_thread (ptr=0x41230f10) at vendor/qcom/proprietary/gles/adreno200/egl14/src/linux/android/eglUpdaterAndroid.c:451
#5 0x40278eb4 in __thread_entry (func=0x40423c55 <updater_thread>, arg=0x41230f10, tls=0x41041f00) at bionic/libc/bionic/pthread.c:218
#6 0x4027860c in pthread_create (thread_out=0x41230f58, attr=0x402a0154 <gDefaultPthreadAttr>, start_routine=0x40423c55 <updater_thread>, arg=0x41230f10) at bionic/libc/bionic/pthread.c:357
#7 0x00000000 in ?? ()
FramebufferNativeWindow::queueBuffer
274int FramebufferNativeWindow::queueBuffer(ANativeWindow* window,
275 ANativeWindowBuffer* buffer, int fenceFd)
276{
277 FramebufferNativeWindow* self = getSelf(window);
278 Mutex::Autolock _l(self->mutex);
279 framebuffer_device_t* fb = self->fbDev;
280 buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle;
281
282 sp<Fence> fence(new Fence(fenceFd));
283 fence->wait(Fence::TIMEOUT_NEVER);
284
285 const int index = self->mCurrentBufferIndex;
286 int res = fb->post(fb, handle); // ** fb_post
287 self->front = static_cast<NativeBuffer*>(buffer);
288 self->mNumFreeBuffers++;
289 self->mCondition.broadcast();
290 return res;
291}
SurfaceTextureClient(USAGE_TEXTURE) is used by normal application layers with GPU used buffers.
#05 pc 00014a6b /system/lib/libbinder.so (android::BpBinder::transact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+34)
#06 pc 0001e337 /system/lib/libgui.so
#07 pc 000217fb /system/lib/libgui.so (android::SurfaceTextureClient::dequeueBuffer(ANativeWindowBuffer**)+86)
#08 pc 000207a7 /system/lib/libgui.so (android::SurfaceTextureClient::hook_dequeueBuffer(ANativeWindow*, ANativeWindowBuffer**)+10)
#09 pc 00002705 /system/lib/egl/eglsubAndroid.so (oeglSwapBuffers something maybe)
#10 pc 000037dd /system/lib/egl/eglsubAndroid.so (eglSwapBuffers something maybe)
#11 pc 00010f90 /system/lib/egl/libEGL_adreno200.so (qeglDrvAPI_eglSwapBuffers+452)
#12 pc 000061bc /system/lib/egl/libEGL_adreno200.so (eglSwapBuffers+16)
#13 pc 0000c6a9 /system/lib/libEGL.so (eglSwapBuffers+164)
[Reference]
http://blog.chinaunix.net/uid-25871104-id-3925025.html
01-02 00:00:42.549: D/zzgratest(275): #00 pc 00029924 /system/lib/libsurfaceflinger.so (android::FramebufferSurface::onFrameAvailable()+23)
01-02 00:00:42.549: D/zzgratest(275): #01 pc 0001f1c4 /system/lib/libgui.so (android::BufferQueue::ProxyConsumerListener::onFrameAvailable()+15)
01-02 00:00:42.549: D/zzgratest(275): #02 pc 0001f0bc /system/lib/libgui.so (android::BufferQueue::queueBuffer(int, android::IGraphicBufferProducer::QueueBufferInput const&, android::IGraphicBufferProducer::QueueBufferOutput*)+851)
01-02 00:00:42.549: D/zzgratest(275): #03 pc 000277dc /system/lib/libgui.so (android::Surface::queueBuffer(ANativeWindowBuffer*, int)+223)
01-02 00:00:42.549: D/zzgratest(275): #04 pc 0002644a /system/lib/libgui.so (android::Surface::hook_queueBuffer(ANativeWindow*, ANativeWindowBuffer*, int)+7)
01-02 00:00:42.549: D/zzgratest(275): #05 pc 00003478 /system/vendor/lib/egl/eglsubAndroid.so (SwapBuffers+312)
01-02 00:00:42.549: D/zzgratest(275): #06 pc 00012b0c /system/vendor/lib/egl/libEGL_adreno.so (qeglDrvAPI_eglSwapBuffers+1544)
01-02 00:00:42.549: D/zzgratest(275): #07 pc 00006c20 /system/vendor/lib/egl/libEGL_adreno.so (eglSwapBuffers+16)
01-02 00:00:42.549: D/zzgratest(275): #08 pc 0000fb1a /system/lib/libEGL.so (eglSwapBuffers+277)
01-02 00:00:42.549: D/zzgratest(275): #09 pc 0001d8c4 /system/lib/libsurfaceflinger.so (android::DisplayDevice::swapBuffers(android::HWComposer&) const+131)
01-02 00:00:42.549: D/zzgratest(275): #10 pc 0002334e /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::doDisplayComposition(android::sp<android::DisplayDevice const> const&, android::Region const&)+121)
01-02 00:00:42.549: D/zzgratest(275): #11 pc 00025884 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::doComposition()+95)
01-02 00:00:42.549: D/zzgratest(275): #12 pc 00025ae0 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::handleMessageRefresh()+47)
01-02 00:00:42.549: D/zzgratest(275): #13 pc 00026874 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::onMessageReceived(int)+63)
01-02 00:00:42.549: D/zzgratest(275): #14 pc 000150ea /system/lib/libutils.so (android::Looper::pollInner(int)+381)
01-02 00:00:42.549: D/zzgratest(275): #15 pc 000151ec /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+91)
01-02 00:00:42.549: D/zzgratest(275): #16 pc 00021cd8 /system/lib/libsurfaceflinger.so (android::MessageQueue::waitMessage()+35)
01-02 00:00:42.549: D/zzgratest(275): #17 pc 00022a68 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::threadLoop()+1)
01-02 00:00:42.549: D/zzgratest(275): #18 pc 00011a8a /system/lib/libutils.so (android::Thread::_threadLoop(void*)+213)
01-02 00:00:42.549: D/zzgratest(275): #19 pc 0001157e /system/lib/libutils.so
01-02 00:00:42.549: D/zzgratest(275): #20 pc 0000cba0 /system/lib/libc.so (__thread_entry+72)
01-02 00:00:42.549: D/zzgratest(275): #21 pc 0000cd1c /system/lib/libc.so (pthread_create+208)
SurfaceFlinger::doComposition()
-->doDisplayComposition()
//DisplayDevicce::PARTIAL_UPDATES NOTE
-->-->doComposeSurface()
-->-->-->HWComposer::hasGlesComposition()
//by check disp.hasFbComp
-->-->-->-->LayerBase::draw()
-->-->-->-->-->Layer::onDraw()
-->-->-->-->-->-->drawWithOpenGL()
-->-->-->HWComposer::hasHwcComposition()
//by check disp.hasOvComp
-->-->DisplayDevice->swapBuffers(getHwComposer()) // ** in doDisplayComposition
-->-->-->eglSwapBuffers()@libEGL.so // ** Swap buffers in EGLSurface, holding BufferQueue(USAGE_HW_FB) with consumer FrameBufferSurface.
-->-->-->-->eglSwapBuffers()@libEGL_adreno.so
-->-->-->-->-->qeglDrvAPI_eglSwapBuffers()@libEGL_adreno.so
-->-->-->-->-->-->SwapBuffers()@eglsubAndroid.so
-->-->-->-->-->-->-->Surface::hook_queueBuffer()
-->-->-->-->-->-->-->-->Surface::queueBuffer()
-->-->-->-->-->-->-->-->-->BufferQueue::queueBuffer()
-->-->-->-->-->-->-->-->-->-->BufferQueue::ProxyConsumerListener::onFrameAvailable()
-->-->-->-->-->-->-->-->-->-->-->FramebufferSurface::onFrameAvailable()
-->-->-->-->-->-->-->-->-->-->-->-->HWComposer::fbPost()
-->-->-->-->-->-->-->-->-->-->-->-->-->framebuffer_device_t::(*post)() = fb_post()
-->-->-->-->-->-->-->-->-->-->-->-->-->-->ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) // ** the framebuffer is swapped.
in DisplayDevice::readyToRun, Surface instance will be registered as egl's window surface. Surface includes FramebufferSurface's BufferQueue(USAGE_HW_FB|USAGE_HW_COMPOSER) and inherits from ANativeWindow. in Surface, ANativeWindow's hook function should be called by egl!!! Thus Surface's and its BufferQueue's queuebuffer()s will be called. Then BufferQueue's and its comsumer FramebufferSurface's onframeavailable will be called.
-->DisplayDevice::flip()
-->-->eglSetSwapRectangleANDROID() ************** I think should be 'set' the region..
-->-->-->-->DisplayDevice::onSwapBuffersCompleted() // ** callbacked by eglSwpaBuufers
-->-->-->-->-->Signal the Fence
-->postFramebuffer()
-->-->HWComposer::commit()
-->-->-->mHwc->set() that is hwc_set
-->-->-->-->MDPComp::draw()
-->-->-->-->-->MDPCompSplit::draw()
-->-->-->-->-->-->Overlay::queueBuffer
-->-->-->-->-->-->-->GenericPipe::queueBuffer()
-->-->-->-->-->-->-->-->MdpData::queueBuffer()
-->-->-->-->-->-->-->-->-->MdpData::play()
-->-->-->-->-->-->-->-->-->-->mdp_wrapper::play()
-->-->-->-->-->-->-->-->-->-->-->ioctl(MSMFB_OVERLAY_PLAY) // **start the layerMixer to composite, overlay the HWC_OVERLAY layer to framebuffer.
-->-->-->-->Overlay::displayCommit()
-->-->-->-->->Overlay::displayCommit()
-->-->-->-->->-->mdp_wrapper::displayCommit()
-->-->-->-->->-->-->ioctl(MSMFB_DISPLAY_COMMIT) // ** start DMA, transfer layerMixer output to DSI controller
FramebufferSurface no longer speaks directly to the FB HAL. Now
everything goes through HWComposer (which may or may not be
connected to a hardware composer).
120// Overrides ConsumerBase: onFrameAvailable(), does not call base class impl.
121void FramebufferSurface: onFrameAvailable() {
122 sp<GraphicBuffer> buf;
123 sp<Fence> acquireFence;
124 status_t err = nextBuffer(buf, acquireFence);
125 if (err != NO_ERROR) {
126 ALOGE("error latching nnext FramebufferSurface buffer: %s (%d)",
127 strerror(-err), err);
128 return;
129 }
130 err = mHwc.fbPost(mDisplayType, acquireFence, buf);
131 if (err != NO_ERROR) {
132 ALOGE("error posting framebuffer: %d", err);
133 }
134}
757int HWComposer::fbPost(int32_t id,
758 const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
759 if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
760 return setFramebufferTarget(id, acquireFence, buffer);
761 } else {
762 acquireFence->waitForever("HWComposer::fbPost");
763 return mFbDev->post(mFbDev, buffer->handle); // ** fb_post
764 }
765}
195void DisplayDevice::flip(const Region& dirty) const
196{
197 checkGLErrors();
198
199 EGLDisplay dpy = mDisplay;
200 EGLSurface surface = mSurface;
201
202#ifdef EGL_ANDROID_swap_rectangle
203 if (mFlags & SWAP_RECTANGLE) {
204 const Region newDirty(dirty.intersect(bounds()));
205 const Rect b(newDirty.getBounds());
206 eglSetSwapRectangleANDROID(dpy, surface,// *****
207 b.left, b.top, b.width(), b.height());
208 }
209#endif
210
211 mPageFlipCount++;
212}
Another ANativeWindow with same role of Class Surface(for USAGE_HW_FB) is FrameBufferNativeWindow used by QCom's "GL updater" thread.
GL updater will call this.
GL updater, call FrameBufferNativeWindow::queueBuffer ANativeWindow::dequeueBuffer in eglsubAndroid.so
Thread 3 (LWP 511):
#0 __ioctl () at bionic/libc/arch-arm/syscalls/__ioctl.S:10
#1 0x4028e070 in ioctl (fd=<optimized out>, request=17921) at bionic/libc/bionic/ioctl.c:41
#2 0x400eed38 in fb_post (dev=<optimized out>, buffer=0x4122ff80) at hardware/qcom/display/libgralloc/framebuffer.cpp:129
#3 0x4004ec5a in android::FramebufferNativeWindow::queueBuffer (window=0x4122f578, buffer=<optimized out>) at frameworks/native/libs/ui/FramebufferNativeWindow.cpp:304
#4 0x40423da4 in updater_thread (ptr=0x41230f10) at vendor/qcom/proprietary/gles/adreno200/egl14/src/linux/android/eglUpdaterAndroid.c:451
#5 0x40278eb4 in __thread_entry (func=0x40423c55 <updater_thread>, arg=0x41230f10, tls=0x41041f00) at bionic/libc/bionic/pthread.c:218
#6 0x4027860c in pthread_create (thread_out=0x41230f58, attr=0x402a0154 <gDefaultPthreadAttr>, start_routine=0x40423c55 <updater_thread>, arg=0x41230f10) at bionic/libc/bionic/pthread.c:357
#7 0x00000000 in ?? ()
FramebufferNativeWindow::queueBuffer
274int FramebufferNativeWindow::queueBuffer(ANativeWindow* window,
275 ANativeWindowBuffer* buffer, int fenceFd)
276{
277 FramebufferNativeWindow* self = getSelf(window);
278 Mutex::Autolock _l(self->mutex);
279 framebuffer_device_t* fb = self->fbDev;
280 buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle;
281
282 sp<Fence> fence(new Fence(fenceFd));
283 fence->wait(Fence::TIMEOUT_NEVER);
284
285 const int index = self->mCurrentBufferIndex;
286 int res = fb->post(fb, handle); // ** fb_post
287 self->front = static_cast<NativeBuffer*>(buffer);
288 self->mNumFreeBuffers++;
289 self->mCondition.broadcast();
290 return res;
291}
SurfaceTextureClient(USAGE_TEXTURE) is used by normal application layers with GPU used buffers.
#05 pc 00014a6b /system/lib/libbinder.so (android::BpBinder::transact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+34)
#06 pc 0001e337 /system/lib/libgui.so
#07 pc 000217fb /system/lib/libgui.so (android::SurfaceTextureClient::dequeueBuffer(ANativeWindowBuffer**)+86)
#08 pc 000207a7 /system/lib/libgui.so (android::SurfaceTextureClient::hook_dequeueBuffer(ANativeWindow*, ANativeWindowBuffer**)+10)
#09 pc 00002705 /system/lib/egl/eglsubAndroid.so (oeglSwapBuffers something maybe)
#10 pc 000037dd /system/lib/egl/eglsubAndroid.so (eglSwapBuffers something maybe)
#11 pc 00010f90 /system/lib/egl/libEGL_adreno200.so (qeglDrvAPI_eglSwapBuffers+452)
#12 pc 000061bc /system/lib/egl/libEGL_adreno200.so (eglSwapBuffers+16)
#13 pc 0000c6a9 /system/lib/libEGL.so (eglSwapBuffers+164)
[Reference]
http://blog.chinaunix.net/uid-25871104-id-3925025.html
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