ugh

what.swift

import Cocoa
import ImageIO
import CoreGraphics


var cs = CGColorSpaceCreateDeviceRGB();

var bitmapOptions = CGBitmapInfo.byteOrder16Little.rawValue | CGImageAlphaInfo.premultipliedLast.rawValue;

var bitmapContext = CGContext(data: nil, width: 10, height: 10, bitsPerComponent: 16, bytesPerRow: 0, space: cs, bitmapInfo: bitmapOptions);

var img = bitmapContext!.makeImage();

var data = NSMutableData();

var imageDestination = CGImageDestinationCreateWithData(data, kUTTypeTIFF, 1, nil);

CGImageDestinationAddImage(imageDestination!, img!, nil);
let worked = CGImageDestinationFinalize(imageDestination!);



var imageSourceRef = CGImageSourceCreateWithData(data, nil)

var imageRef = CGImageSourceCreateImageAtIndex(imageSourceRef!, 0, NSDictionary());

imageRef!.bitsPerComponent;

assert(imageRef!.bitsPerComponent == 16)

NSLog("Done.")