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let scaledImage: UIImage
do {
UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
defer {
// Fill background
UIColor.blackColor().setFill(); UIRectFill(CGRect(origin: .zero, size: size))
// Draw scaled image
let drawingRect: CGRect = CGRect(
origin: drawingOrigin,
size: CGSize(width: scaledWidth, height: scaledHeight))
// Fetch image
scaledImage = UIGraphicsGetImageFromCurrentImageContext()!
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