50 lines
1.9 KiB
Swift
50 lines
1.9 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import UIKit.UIColor
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public extension UIColor {
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struct HSBA {
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public var hue: CGFloat = 0
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public var saturation: CGFloat = 0
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public var brightness: CGFloat = 0
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public var alpha: CGFloat = 0
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public init?(color: UIColor) {
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// Note: Looks like as of iOS 10 devices use the kCGColorSpaceExtendedGray color
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// space for grayscale colors which seems to be compatible with the RGB color space
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// meaning we don'e need to check 'getWhite:alpha:' if the below method fails, for
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// more info see: https://developer.apple.com/documentation/uikit/uicolor#overview
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guard color.getHue(&hue, saturation: &saturation, brightness: &brightness, alpha: &alpha) else {
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return nil
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}
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}
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}
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var hsba: HSBA? { return HSBA(color: self) }
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// MARK: - Functions
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func toImage(isDarkMode: Bool) -> UIImage {
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let bounds: CGRect = CGRect(x: 0, y: 0, width: 1, height: 1)
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let renderer: UIGraphicsImageRenderer = UIGraphicsImageRenderer(bounds: bounds)
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return renderer.image { rendererContext in
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rendererContext.cgContext
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.setFillColor(
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self.resolvedColor(
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// Note: This is needed for '.cgColor' to support dark mode
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with: UITraitCollection(userInterfaceStyle: isDarkMode ? .dark : .light)
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).cgColor
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)
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rendererContext.cgContext.fill(bounds)
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}
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}
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func darken(by percentage: CGFloat) -> UIColor {
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guard percentage != 0 else { return self }
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guard let hsba: HSBA = self.hsba else { return self }
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return UIColor(hue: hsba.hue, saturation: hsba.saturation, brightness: (hsba.brightness - percentage), alpha: hsba.alpha)
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}
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}
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