[webkit-dev] How webkit on android implements magnifying glass?

[ying lcs]

Hi,

In webkit on android, it has a 'magnifying glass' feature: in the zoom
out view, it has a viewing rectangle which shows the content in 100%.

Can you please point to me where is the code how webkit on android
implements magnifying glass?  or what possible function it needs to
call in order to implement that feature?

Thank you for any pointer.
Regards,
Sam