CGImage

public extension CGImage

  • Image size

    Declaration

    Swift

    var size: CGSize { get }

  • Create CGImage from url

    Declaration

    Swift

    static func imageFrom(url: URL) -> CGImage?

    Parameters

    url

    source URL

    Return Value

    optional CGImage

  • Create CGImage from data

    Declaration

    Swift

    static func imageFrom(data: Data) -> CGImage?

    Parameters

    data

    source data

    Return Value

    optional CGImage

  • Write out a png

    Declaration

    Swift

    func writePNG(to: URL) -> Bool

    Parameters

    to

    destination fileURL

    Return Value

    success

  • Png data

    Declaration

    Swift

    func pngData() -> Data?

    Return Value

    png

  • Make image from all or part of self

    Declaration

    Swift

    func makeImage(size: CGSize, fromRect: CGRect? = nil, hasAlpha: Bool = true, backgroundColour: CGColor = .white) -> CGImage?

    Parameters

    size

    size of resulting image
    fromRect

    source rect (does not need to be within the image)
    hasAlpha

    whether the result should have an alpha channel
    backgroundColour

    if the image doesn’t have an alpha channel, then this fill is applied ‘behind’ the image

    Return Value

    optional CGImage