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