1-Bit Bitmap

[Asad Jibran Ahmed <surfer a1 gmail com>]

I'm looking to create an application that requires using 1-bit bitmaps
to store a monochrome printing pattern. But I've looked at both Pixmaps
and Pixbufs, but Pixbufs doesn't offer direct access to the bits (I need
to set and read them) and Pixmaps doesn't support 1-Bit pixels (at least
that's what I understand from my reading of the docs).
Any suggestions?