Convert CFContextRef to mutable void pointer in swift?
I ended up with the reinterpretCast function returning intermediate Int variable for the bitmapContext address.
var bitmapContext: CGContext = CGBitmapContextCreate(...)
let bitmapContextAddress: Int = reinterpretCast(bitmapContext)
let bitmapContextPointer: CMutableVoidPointer = COpaquePointer(UnsafePointer<CGContext>(bitmapContextAddress))
let context = NSGraphicsContext(graphicsPort: bitmapContextPointer, flipped: false)
How to use Implicitly Unwrapped Optionals?
As of Swift 1.0
If your deployment target is 10.10 you can use the convenience method introduced with Yosemite.
let context = NSGraphicsContext.currentContext().CGContext
If you have to support 10.9 you'll have to cast the context manually as per below.
let contextPtr = NSGraphicsContext.currentContext().graphicsPort
let context = unsafeBitCast(contextPtr, CGContext.self)
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