UIImage extensions in swift, If you land on this gist by any chance. feel free to use it :)

UIImage+Omar.swift

//
//  UIImageView+Omar.swift
//  .........
//
//  Created by Omar Alshammari on 12/20/15.
//  Copyright © 2015 ___OALSHAMMARI___. All rights reserved.
//

/*
This enum is to help referencing Assets ID.
*/
enum AssetCatalogIdentifier: String {
    case PlaceHolder = "placeHolder"
}

/*
Possible Bar code types.
*/
enum BarCodeType: String {
    case Aztec = "CIAztecCodeGenerator"
    case Code128 = "CICode128BarcodeGenerator"
    case PDF417Barcode = "CIPDF417BarcodeGenerator"
    case QR = "CIQRCodeGenerator"
}

extension UIImage {
    /*
    Creates a a barcode as an image from the string provided.
    */
    convenience init(barCodeString: String, type: BarCodeType) {
        let data = barCodeString.dataUsingEncoding(NSASCIIStringEncoding)
        let filter = CIFilter(name: type.rawValue)
        filter?.setValue(data, forKey: "inputMessage")
        self.init(CIImage: (filter?.outputImage)!)
    }
    
    /*
    initialize an image from assetID Enum.
    */
    convenience init?(assetID: AssetCatalogIdentifier) {
        self.init(named: assetID.rawValue)
    }
    
    /*
    returns a UIImage with corner radius of 20.0
    */
    func roundCournerImage() -> UIImage {        
        let canvasRect = CGRect(x: 0.0, y: 0.0, width: self.size.width, height: self.size.height)
        let path = UIBezierPath(roundedRect: canvasRect, cornerRadius: 20.0)
        return self.maskedImageWithPath(path)
    }
    
    /*
    returns a circular image. e.g for profiles
    */
    func circularImage() -> UIImage {
        let canvasRect = CGRect(x: 0.0, y: 0.0, width: self.size.width, height: self.size.height)
        let path = UIBezierPath(ovalInRect: canvasRect)
        return self.maskedImageWithPath(path)
        
        
    }
    /*
    returns a masked image based on the path provided.
    */
    func maskedImageWithPath(path: UIBezierPath) -> UIImage {
        let size = CGSize(width: self.size.width, height: self.size.height)
        UIGraphicsBeginImageContextWithOptions(size, false, UIScreen.mainScreen().scale)
        let canvasRect = CGRect(x: 0.0, y: 0.0, width: self.size.width, height: self.size.height)
        path.addClip()
        self.drawInRect(canvasRect)
        let outputImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return outputImage
    }
}