Relative-coordinate version of cairo_line_to(). Adds a line to the path from the current point to a point that is offset from the current point by (dx, dy) in user space. After this call the current point will be offset by (dx, dy). Given a current point of (x, y), cairo_rel_line_to(cr, dx, dy) is logically equivalent to cairo_line_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

class Context
double dx
double dy


dx double

the X offset to the end of the new line

dy double

the Y offset to the end of the new line