I am surprised at the lack of response to all the xlib related question I've had on SO, is this because no one uses xlib directly anymore or is this the wrong place to ask these types of questions? Even if no one uses xlib directly, there must still be people the remember the bad old days and help with these questions, but it doesn't look like they are here...
Edit: What other places could I ask for xlib related help?
No, XLib is certainly a valid topic here but I think your first contention is correct: almost nobody uses it anymore. I vaguely remember using it some fifteen years ago and I liken it to:
(Pick your favorite).
I suspect it's not the sort of question that'll be answered quickly by the PHP/Silverlight/.NET/Python groups who frequent this site. You may have to wait a few days until someone a little more knowledgeable about the subject matter notices it.
Sorry I couldn't help with the specific question (I assume you meant the polygon filler without stipple - if not, let me know which one (with a link) and I'll have a quick look).
Other places to ask for help:
No, not so much. I did Motif as recently as 2003, but that's it. Most of that was getting replaced with a heavyweight Java Swing app at the time.
possible ways to get help for xlib:
I have a Linux Point of Sale solution that is programmed entirely in Xlib. My web site is http://www.viewtouch.com and my email is gene at viewtouch.com if you want to correspond with me or if you would like a copy of the software.
I'm using it!
I wrote this with a friend... http://open.vitaminap.it/en/x_tile.htm