The surface flinger doesn't draw the buffer, the application does.
On Wed, May 25, 2011 at 7:57 AM, drjunior <[email protected]> wrote:
> Version 2.3.3.
>
> int FramebufferNativeWindow::queueBuffer(ANativeWindow* window,
> android_native_buffer_t* buffer)
> {
> FramebufferNativeWindow* self = getSelf(window);
> Mutex::Autolock _l(self->mutex);
> framebuffer_device_t* fb = self->fbDev;
> buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)-
> >handle;
>
> const int index = self->mCurrentBufferIndex;
> GraphicLog& logger(GraphicLog::getInstance());
> logger.log(GraphicLog::SF_FB_POST_BEFORE, index);
>
> int res = fb->post(fb, handle);
>
> logger.log(GraphicLog::SF_FB_POST_AFTER, index);
>
> self->front = static_cast<NativeBuffer*>(buffer);
> self->mNumFreeBuffers++;
> self->mCondition.broadcast();
> return res;
> }
>
> There are a lot of "buffers"here! (framebuffer_device_t* fb, self-
> >front, handle..)
> I can't see where is the "fill" of the buffers with some content. I
> would like to find some kind of memcpy or something related with that.
>
>
> On May 25, 2:38 pm, extrapedestrian <[email protected]>
> wrote:
> > What version of Android?
> >
> > in Froyo 2.2 there is FramebufferNativeWindow::queueBuffer and
> > FramebufferNativeWindow::dequeueBuffer
> > called in SwapBuffers before flip().
> >
> > I think you can access native buffer there.
> >
> > On May 24, 8:28 pm, drjunior <[email protected]> wrote:
> >
> >
> >
> >
> >
> >
> >
> > > I've been digging around SurfaceFlinger service implementation trying
> > > to understand how it is implemented. I started studying the /
> > > frameworks/base/services/surfaceflinger/SurfaceFlinger.cpp file and
> > > the methods handleRepaint() and composeSurfaces(). What I would like
> > > to know is how I can access the buffers(if I can do that) that has the
> > > bitmap of the rectangle changed. I already found where the flip is
> > > done( /frameworks/base/services/surfaceflinger/DisplayHardware/
> > > DisplayHardware.cpp::flip() ) and here I could confirm the size of the
> > > rectangle(within the entire surface) that had changes. Now, I would
> > > like to access the buffer of the surface that has the content with the
> > > bitmap changed. There are a lot of files to search and without
> > > documentation it's really difficult to find how to do that.
> >
> > > Thank you for your help.
>
> --
> unsubscribe: [email protected]
> website: http://groups.google.com/group/android-porting
>
--
Dianne Hackborn
Android framework engineer
[email protected]
Note: please don't send private questions to me, as I don't have time to
provide private support, and so won't reply to such e-mails. All such
questions should be posted on public forums, where I and others can see and
answer them.
--
unsubscribe: [email protected]
website: http://groups.google.com/group/android-porting
