struct CGBitmapInfo : OptionSetType {
    init(rawValue rawValue: UInt32)
    static var AlphaInfoMask: CGBitmapInfo { get }
    static var FloatComponents: CGBitmapInfo { get }
    static var ByteOrderMask: CGBitmapInfo { get }
    static var ByteOrderDefault: CGBitmapInfo { get }
    static var ByteOrder16Little: CGBitmapInfo { get }
    static var ByteOrder32Little: CGBitmapInfo { get }
    static var ByteOrder16Big: CGBitmapInfo { get }
    static var ByteOrder32Big: CGBitmapInfo { get }
}

struct CGBitmapInfo : OptionSetType {
    init(rawValue rawValue: UInt32)
    static var AlphaInfoMask: CGBitmapInfo { get }
    static var FloatInfoMask: CGBitmapInfo { get }
    static var FloatComponents: CGBitmapInfo { get }
    static var ByteOrderMask: CGBitmapInfo { get }
    static var ByteOrderDefault: CGBitmapInfo { get }
    static var ByteOrder16Little: CGBitmapInfo { get }
    static var ByteOrder32Little: CGBitmapInfo { get }
    static var ByteOrder16Big: CGBitmapInfo { get }
    static var ByteOrder32Big: CGBitmapInfo { get }
}

typealias CGColorRef = CGColor

class CGColor {
}

typealias CGColorSpaceRef = CGColorSpace

class CGColorSpace {
}

typealias CGContextRef = CGContext

class CGContext {
}

typealias CGDataConsumerRef = CGDataConsumer

class CGDataConsumer {
}

typealias CGDataProviderRef = CGDataProvider

class CGDataProvider {
}

typealias CGFontRef = CGFont

class CGFont {
}

typealias CGFunctionRef = CGFunction

class CGFunction {
}

typealias CGGradientRef = CGGradient

class CGGradient {
}

typealias CGImageRef = CGImage

class CGImage {
}

typealias CGLayerRef = CGLayer

class CGLayer {
}

typealias CGMutablePathRef = CGMutablePath

class CGMutablePath {
}

typealias CGPathRef = CGPath

class CGPath {
}

typealias CGPatternRef = CGPattern

class CGPattern {
}

typealias CGPDFDocumentRef = CGPDFDocument

class CGPDFDocument {
}

typealias CGPDFPageRef = CGPDFPage

class CGPDFPage {
}

typealias CGShadingRef = CGShading

class CGShading {
}