xf1bpp is rumored to be for monochrome framebuffers where bit order doesn't
match byte order. it should be replaced with a combination of fb and shadowfb.
Created attachment 3582 [details] [review]
something like this might work.
Created attachment 5861 [details] [review]
this one actually builds, although it doesn't work right. looks like i'm just
screwing up addressing the front buffer though.
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
xf1bpp is just plain gone now.