import UIKit

public class TiltShiftOperation : NSOperation {
  public var inputImage: UIImage?
  public var outputImage: UIImage?
  
  override public func main() {
    guard let inputImage = inputImage else { return }
    let mask = topAndBottomGradient(inputImage.size)
    outputImage = inputImage.applyBlurWithRadius(4, maskImage: mask)
  }
}

/*
* Copyright (c) 2015 Razeware LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

import UIKit

public class TiltShiftOperation : NSOperation {
  
  public init(image: UIImage, completion: ((UIImage?) -> ())) {
    inputImage = image
    self.completion = completion
    super.init()
  }
  
  private var inputImage: UIImage
  private var completion: ((UIImage?) -> ())
  
  override public func main() {
    let mask = topAndBottomGradient(inputImage.size)
    let outputImage = inputImage.applyBlurWithRadius(4, maskImage: mask)
    completion(outputImage)
  }
}

Update the TiltShift operation to accept parameters
Update the TiltShift operation to accept parameters
