[dba-Tech] Graphical code documentor

I'm not sure whether the subject communicates what I'm after, so I'll go a bit further. I have to document a bunch of code written in several languages including java, javascript, vb6, C++. I have run jsDoc and javaDoc and vbDoc on the relevant portions, and what they do is fine, but it doesn't go far enough. I would like some sort of pictorial representation of the code, such as:

Function Main
     calls Sub1
        calls Sub1.1
            calls Sub1.1.1
        calls Sub1.2
    calls Sub2
and so on.

Can anyone think of a tool that does this?

TIA, 
Arthur