cgpath dump extension.swift

import CoreGraphics

private typealias CGPathDumpUtility = CGPath
extension CGPathDumpUtility {

    func dump() {
        self.apply(info: nil) { info, unsafeElement in
            let element = unsafeElement.pointee
            
            switch element.type {
            case .moveToPoint:
                let point = element.points[0]
                print("moveto - \(point)")
            case .addLineToPoint:
                let point = element.points[0]
                print("lineto - \(point)")
            case .addQuadCurveToPoint:
                let control = element.points[0]
                let point = element.points[1]
                print("quadCurveTo - \(point) - \(control)")
            case .addCurveToPoint:
                let control1 = element.points[0]
                let control2 = element.points[1]
                let point = element.points[2]
                print("curveTo - \(point) - \(control1) - \(control2)")
            case .closeSubpath:
                print("close")
            }
        }
    }
    
}