Begin a new sub-path. After this call the current point will offset
by (x, y).
Given a current point of (x, y), cairo_rel_move_to(cr, dx, dy)
is logically equivalent to cairo_move_to(cr, x + dx, y + dy).
It is an error to call this function with no current point. Doing
so will cause cr to shutdown with a status of
CAIRO_STATUS_NO_CURRENT_POINT.
Since 1.0
Begin a new sub-path. After this call the current point will offset by (x, y). Given a current point of (x, y), cairo_rel_move_to(cr, dx, dy) is logically equivalent to cairo_move_to(cr, x + dx, y + dy). It is an error to call this function with no current point. Doing so will cause cr to shutdown with a status of CAIRO_STATUS_NO_CURRENT_POINT. Since 1.0