I am getting unsupported parameter combination CGBitmap error with swift

Question

I am trying to create a CGContext in swift. It compiles but throws an error at runtime.

let colorSpace:CGColorSpace = CGColorSpaceCreateDeviceRGB()
let conte         


        

Answer 1

Updated for Swift 3:

    let colorSpace = CGColorSpaceCreateDeviceRGB()
    let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
    guard let context = CGContext.init(data: nil, width: Int(size.width), height: Int(size.height), bitsPerComponent: Int(bitsPerComponent), bytesPerRow: Int(bytesPerRow), space: colorSpace, bitmapInfo: UInt32(bitmapInfo.rawValue)) else {
        // cannot create context - handle error
    }

Answer 2

CGBitmapInfo.AlphaInfoMask is not a valid bitmap info.

Try setting CGBitmapInfo.AlphaLast or CGBitmapInfo.AlphaFirst.