Redmine

Is it possible to embedd ab picture from a repository path?

Project foo:

- having mounted repo for foo
- having picture bar.jpb in Repository path a/b/c

Is it possible to place this picture in wiki pages like

!source:a/b/c/bar.jpg!

Trying exactly this leads to HTML like <img src="source:a/b/c/bar.jpg" alt="">

It is possible to have something like

!http://repo-root/a/b/c/bar.jpg! but in this case the acces to http://repo-root must be public.