2009/4/10 tom <gxiao...@sohu.com> > > I had read the surface flinger source code in cupcake, and hope to > undertand how the android GUI system work. but now I am mixed-up > still. > and following is my understand and questions: > > surfaceflinger work flow: > (1) new surfaceflingerclient(), it will createconnection(), and new a > client > (2) createsurface, it will new layer or layerblur or layerdim by z- > blend order > (3) createoverlay, if layer support overlay > (4) register buffer > (5) draw something on canvas(line, text, bitmap, rect...) which attach > above buffer > (6) post buffer > > my questions now: > (1) surfaceflinger.cpp > SurfaceFlinger::createconnection() will create a client which allocate > 8MB heap for manangement surface data handle(color conversion, flip, > layers). > how many client have android system? one is BootAnimation, one is test > sample overlays.cpp, one is debug CPUGUAGE, and one is WindowManager? > In fact BootAnimation will destroy when it finish, (but how it destroy > the 8MB heap?). Test sample and debug CPUGUAGE will not start for it > is not enabled. > So android system has only one surface flinger client, isn't it? > OpenGL has another client? > [tony]In my understanding,each activity will need to construct one client > of surfaceflinger.
> > (2)createsurface() > each app with one window has attached one surface? or all app share > one surface? > one surfaceflinger client can create mutiple surfaces? > [tony]One client can create multiple surfaces,apps can't share surface. > > (3)copybit.default.so > where is the source code? > [tony]should be depend on hardware. > (4)surfaceflinger not support YUV format? > and it ony support RGB565? > > more question and analysis will be continued, > welcome helps > > thanks > > tom > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "android-framework" group. To post to this group, send email to android-framework@googlegroups.com To unsubscribe from this group, send email to android-framework+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-framework?hl=en -~----------~----~----~----~------~----~------~--~---
