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> I am looking for a simple way to generate and write a color image to
> disk. I know that there is the GD library, the Cairo library, and
> several other things that require the installation of various C level
> libraries in order to use them. I don't want to have to install a
> bunch of libraries that deal with reading and writing images, as all I
> am looking to do is be able to generate some simple image files that I
> can then view in other programs.

Have you tried image magick?
http://www.imagemagick.org/script/command-line-processing.php

I don't think you can get away with not having these kinds of libs.
You don't say what OS you're on.  I would give different advice for
windows, osx and linux.

wes