fillPath
open override fun fillPath(path: PdfPath, ctm: Matrix, color: RgbColor, evenOdd: Boolean, alpha: Double, blendMode: BlendMode)
Fill path under ctm with color at alpha (0..1) under the given blendMode. The default alpha = 1.0 + blendMode = Normal is the plain over-paint that PDF assumes when no ExtGState modifies the state.