[cairo] API proposal: cairo_save/restore_path

[Behdad Esfahbod]

I want to propose cairo_save_path() and cairo_restore_path() for
cairo 1.6.

I'm not sure if this is a necessary feature, but it occured to me
that when implementing a Postscript viewer on top of cairo, it's
useful to be able to save/restore the path in a cairo_t, since PS
keeps the path in its gstate.

The patch to implement this is pretty simple.  Without this API,
users need to use cairo_copy_path()/cairo_append_path().  That is
rather expensive and wasteful since it converts from device space
back to user space and into device space again...

Thoughts?

-- 
behdad
http://behdad.org/

"Those who would give up Essential Liberty to purchase a little
 Temporary Safety, deserve neither Liberty nor Safety."
        -- Benjamin Franklin, 1759