A few quick questions about gtkprint

[Vamsi Krishna Davuluri <vamsi davuluri gmail com>]

hello,

I am a gsoc applicant for sugar, and doing a project which adds print
support to our applications.
The idea is to convert our mime types to a more printable format and print
them.
So, now the question is how does convertion to ps/pdf take place with
gtkprint
I would like to know if it is true that gtkprint uses a common filter for
converting to pdf/ps for any application?
or will it again interact with different respective filters?

Thank you

Vamsi Krishna Davuluri