[Cairo] Software rendering

[Carl Worth]

On Jul 18, David Forster wrote:
 > I'm curious that if you don't have a showpage operator, then how are
 > you going to support client side rendering?

Cairo does indeed need a show_page operator.

 > Not to mention double-buffering is useful enough for normal RENDER
 > rendering, OpenGL, GIF, MNG[*], PDF, and PS.

Yes, this might be a semantic attached to show_page at some point.

-Carl