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joshbuchea/swift-extend-color-init-support-hex.swift

Last active April 16, 2024 11:34
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Revisions

  1. joshbuchea revised this gist Oct 20, 2020. 1 changed file with 23 additions and 23 deletions.
    46 changes: 23 additions & 23 deletions swift-extend-color-init-support-hex.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -1,27 +1,27 @@
    // From SO answer: https://stackoverflow.com/a/56874327/1492782
    extension Color {
    init(hex: String) {
    let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
    var int: UInt64 = 0
    Scanner(string: hex).scanHexInt64(&int)
    let a, r, g, b: UInt64
    switch hex.count {
    case 3: // RGB (12-bit)
    (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
    case 6: // RGB (24-bit)
    (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
    case 8: // ARGB (32-bit)
    (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
    default:
    (a, r, g, b) = (1, 1, 1, 0)
    }

    self.init(
    .sRGB,
    red: Double(r) / 255,
    green: Double(g) / 255,
    blue: Double(b) / 255,
    opacity: Double(a) / 255
    )
    init(hex: String) {
    let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
    var int: UInt64 = 0
    Scanner(string: hex).scanHexInt64(&int)
    let a, r, g, b: UInt64
    switch hex.count {
    case 3: // RGB (12-bit)
    (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
    case 6: // RGB (24-bit)
    (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
    case 8: // ARGB (32-bit)
    (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
    default:
    (a, r, g, b) = (1, 1, 1, 0)
    }

    self.init(
    .sRGB,
    red: Double(r) / 255,
    green: Double(g) / 255,
    blue: Double(b) / 255,
    opacity: Double(a) / 255
    )
    }
    }
  2. joshbuchea created this gist Oct 20, 2020.
    27 changes: 27 additions & 0 deletions swift-extend-color-init-support-hex.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,27 @@
    // From SO answer: https://stackoverflow.com/a/56874327/1492782
    extension Color {
    init(hex: String) {
    let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
    var int: UInt64 = 0
    Scanner(string: hex).scanHexInt64(&int)
    let a, r, g, b: UInt64
    switch hex.count {
    case 3: // RGB (12-bit)
    (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
    case 6: // RGB (24-bit)
    (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
    case 8: // ARGB (32-bit)
    (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
    default:
    (a, r, g, b) = (1, 1, 1, 0)
    }

    self.init(
    .sRGB,
    red: Double(r) / 255,
    green: Double(g) / 255,
    blue: Double(b) / 255,
    opacity: Double(a) / 255
    )
    }
    }