Android View Shadow Architecture

[Jeff Moguillansky]

Hi,

I would like to get a better understanding of Android's shadow architecture.

My understanding:

In one use case, view shadows are triggered by setElevation API.

In this use case, the shadow rendering is implemented in hwui/SpotShadow.cpp?

Shadows are not supported at the windowing system level (e.g. SurfaceFlinger).  

Shadows are supported within an application, when a view is rendered to the application window?

Would be great if you can provide details of the internal components and architecture.  

Best Regards,

Jeff