Rendering GdkRGB to a 1-bpp pixmap (display)

[Michael Torrie <torriem cs byu edu>]

I'm writing a simple app that works on a 1-bpp X display.  I know gtk
isn't really designed to look good on 1-bpp, but it works well enough
for what I need.   The problem is that if I render either a GdkRGB image
or GdkPixbuf image to a window (drawable), the image gets dithered
properly, but it's inverted.  The lights are dark and vice versa.  Is
this a "bug" in gtk or is it a problem with the X server (besides being
1-bpp ;)?  I could simply invert all the colors when I put them in the
buffer, but then it wouldn't look good on a normal 24-bpp display.

I'm using gtk+-2 (as shipped on redhat 8) and displaying on a
Sparcstation ELC.  I don't use any gui elements at this stage; only the
GtkDrawable in a window.

Any ideas?  Thanks so much.

Michael