[cairo] rcairo and xcb

[cedlemo]

Hi,

I am using rcairo on archlinux with the default package (v1.12.2) and I 
am writing a ruby module for xcb (just for fun). I would like to know if 
the functions in cairo-xcb.h (like cairo_xcb_surface_create) have been 
implemented in rcairo. I have read the source and found some references 
to XCBSurface classes but I don't find any related methods to use. This 
will help me to understand how I could pass data ( xcb_connection_t, 
xcb_drawable, xcb_visual_type) from my xcb module to the rcairo module 
in order to draw on  windows generated by my xcb module.

Thanks.

Cedlemo