raster output to Ghostscript

["Boncek, John" <jboncek hunter com>]

I am working on a large embedded application the current version of which
generates printed output into a framebuffer-like area of memory as a
bitmap of 8 colors.  A custom print driver then sends that image to the
printer as a page.

We are porting this application to a new processor with Linux as the OS
and planning to use the off-the-shelf HPIJS driver from HP which accepts
PostScript.  Is there a straightforward way to embed a raster image into
PostScript/GhostScript?  It is not feasible to convert our complicated
graphics and font output in detail into GhostScript.

More generally, how does one use PostScript to print a bitmap or other
raster image?

Thanks for any help or any pointer to a documentation page that deals with
this.

John Boncek