Delphi Graphics Editor VCL windows graphics to fmx.

I have vector graphics editor written using vcl TCAnvas and win GDI functions. For moving operations it uses inverse pen mode. I need to redone this application to use bitmap cache. without using inversepen. Seconf stage of project is to convert existing application into FMX application. So i need bid from programmer famiuliar with both winAPi graphics and fmx graphics. I can post more details for bidder. Project time frame is aprox 2 weeks.