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

In Swift 2.1 one can access the fields properly, and even OR them together:

let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.PremultipliedFirst.rawValue | CGBitmapInfo.ByteOrder32Little.rawValue)

let context = CGBitmapContextCreate(baseAddress, width, height, 8,
                bytesPerRow, colorSpace, bitmapInfo.rawValue);

Whole lot of 'rawValue' going on :)

You don't even need to separate out the bitmapInfo, and can do a one-liner:

let context = CGBitmapContextCreate(baseAddress, width, height, 8,
                bytesPerRow, colorSpace, CGImageAlphaInfo.PremultipliedFirst.rawValue | CGBitmapInfo.ByteOrder32Little.rawValue