This is a example i find on the web using SDL and GFX for Sigma Processor.

Almost the projects I find are ARM relate, but will be very easy for good coders to port it to MIPS, this one can be compiled to MIPS platform.

Code:
github.com/chinaktv/gxgui.git
For easy compile they add Cmake files.

I hope this clear some minds. Instead of using FB here you can use GFXEngine, for me is what is used by Opensat.

CU and good coding.

:respect-054: