Well, i'm a novice here (in wine and linux), but i think i could help with this task.
I'm a good windows application developer (www.babel7.com), and i wrote two programs with some of the semantics you are looking for:
painting over BMPs (or better DIBs).
The 2 programs are for 256 colors and true RGB. They write on file BMPs. The painting functions were written to generate pie graphs, poligonals, rectangles, and so on, but they can be readapted to write on DIBs in memory.
The sintax help (comm line wo parms) is in Spanish, but i will not ask for excuses for it. The use is very simple. I will rewrite an english sintax help if i begin with the task.
You can download it and test if i could help. If yes, i will begin with the task... And time will say!!
http://www.babel7.com/bmps.zip
Regards...
Aljandro Bonet Babel Informatica SL Madrid alex@winbabel.org