You don't need C++ to generate an ideogram in CIRCOS. CIRCOS itself was written in Perl and can be installed on a *nix or Windows machine. Once installed on a system, all you need is a series of text files to generate the ideogram and overlay your NGS data on it. There is a fairly detailed tutorial on how to generate the ideograms here: http://circos.ca/documentation/tutorials/

There is a little bit of a learning curve to create the configuration file for Circos but its not too complicated overall.

Finally, there is a nice thing in Java:

http://bioinformatics.oxfordjournals.org/content/early/2014/12/24/bioinformatics.btu842.full.pdf+html

http://www.australianprostatecentre.org/research/software/jcircos