and rip RGB values out of?

Bmp''s are pretty easy if you use the GDI. TGA''s are pretty easy also (at least the uncompressed variety). Most art programs can output to a Raw format as well.

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http://www.gdarchive.net/druidgames/

I''d say 16 bit targas are pretty easy. I just use those and compress them myself (using zlib) for my custom graphics format.

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"We are the music makers, and we are the dreamers of the dreams."
- Willy Wonka

What the others said. Also 8bit PCX files are really really simple, though im not sure about 16bit ones.