Replace or wrap or port GDI+ source code in Unity

Hi All,

I have this old Windows application with a lot of source code written in mostly C and a bit of C++. It draws in 2D many shapes and graphics using GDI+ library.

I need to draw the same shapes and graphics inside Unity (on a "virtual screen" that would be placed in a scene).

As the original source code is huge, very complicate, and shared with the original application that has still its own life, I would like to use as much as possible the same code on both.

My source code only uses the following primitives from GDI+ (Graphics) :

• FillPolygon

• DrawLines

• SetClip

plus a few init procedures like SetCompositingMode ...

Everything else is pure C (except the part that calls the GDI functions that are c++)

Is there a way to Wrap or replace those functions by native Unity functions that would be called from C code or is there a way to call directly those function from Unity ?

Of course, I understand that I will have to precise on which 3D plane inside unity I want the drawing to be done.

Thanks a lot for your help,

Have a nice day

Antoine