Constant values that describe path segment operators in PDE path elements.

Values:

IG_PDE_MOVE_TO	0	Designates m (moveto) operator, which moves the current point.
IG_PDE_LINE_TO	1	Designates l (lineto) operator, which appends a straight line segment from the current point.
IG_PDE_CURVE_TO	2	Designates c (curveto) operator, which appends a Bezier curve to the path.
IG_PDE_CURVE_TO_V	3	Designates v (curveto) operator, which appends a Bezier curve to the current path when the first control point coincides with initial point on the curve.
IG_PDE_CURVE_TO_Y	4	Designates y (curveto) operator, which appends a Bezier curve to the current path when the second control point coincides with final point on the curve.
IG_PDE_RECT	5	Designates re operator, which adds a rectangle to the current path.
IG_PDE_CLOSE_PATH	6	Designates h (closepath) operator, which closes the current subpath.