//
//  FillRenderer.swift
//  lottie-swift
//
//  Created by Brandon Withrow on 1/30/19.
//

import QuartzCore

extension FillRule {
  var cgFillRule: CGPathFillRule {
    switch self {
    case .evenOdd:
      .evenOdd
    default:
      .winding
    }
  }

  var caFillRule: CAShapeLayerFillRule {
    switch self {
    case .evenOdd:
      CAShapeLayerFillRule.evenOdd
    default:
      CAShapeLayerFillRule.nonZero
    }
  }
}

// MARK: - FillRenderer

/// A rendered for a Path Fill
final class FillRenderer: PassThroughOutputNode, Renderable {
  var shouldRenderInContext = false

  var color: CGColor? {
    didSet {
      hasUpdate = true
    }
  }

  var opacity: CGFloat = 0 {
    didSet {
      hasUpdate = true
    }
  }

  var fillRule = FillRule.none {
    didSet {
      hasUpdate = true
    }
  }

  func render(_: CGContext) {
    // do nothing
  }

  func setupSublayers(layer _: CAShapeLayer) {
    // do nothing
  }

  func updateShapeLayer(layer: CAShapeLayer) {
    layer.fillColor = color
    layer.opacity = Float(opacity)
    layer.fillRule = fillRule.caFillRule
    hasUpdate = false
  }

}