Kirill Chernov jarakys

Golang Developer

hsiaoer / CombineWithOriginalImage.swift

Created June 24, 2019 15:03

	/// Remove background of input image based on an alpha mask.
	///
	/// - Parameters:
	/// - image: Image to mask
	/// - mask: Input mask. Reduces pixel opacity by mask alpha value. For instance
	/// an alpha value of 255 will be completely opaque, 0 will be completely transparent
	/// and a value of 125 will be partially transparent.
	/// - Returns: Image mask with background removed.
	func createMask(of image: UIImage, fromMask mask: UIImage, withBackground background: UIImage? = nil) -> UIImage? {
	guard let imageCG = image.cgImage, let maskCG = mask.cgImage else { return nil }