65 lines
2.1 KiB
Swift
65 lines
2.1 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import UIKit.UIColor
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import SessionUtilitiesKit
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public extension UIColor {
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func toImage() -> 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.setFillColor(self.cgColor)
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rendererContext.cgContext.fill(bounds)
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}
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}
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func blend(with otherColor: UIColor, alpha: CGFloat) -> UIColor {
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var r0: CGFloat = 0
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var g0: CGFloat = 0
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var b0: CGFloat = 0
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var a0: CGFloat = 0
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self.getRed(&r0, green: &g0, blue: &b0, alpha: &a0)
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var r1: CGFloat = 0
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var g1: CGFloat = 0
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var b1: CGFloat = 0
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var a1: CGFloat = 0
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self.getRed(&r1, green: &g1, blue: &b1, alpha: &a1)
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let finalAlpha: CGFloat = CGFloatClamp01(alpha)
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return UIColor(
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red: CGFloatLerp(r0, r1, finalAlpha),
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green: CGFloatLerp(g0, g1, finalAlpha),
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blue: CGFloatLerp(b0, b1, finalAlpha),
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alpha: CGFloatLerp(a0, a1, finalAlpha)
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)
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}
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func brighten(by percentage: CGFloat) -> UIColor {
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guard percentage != 0 else { return self }
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var hue: CGFloat = 0
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var saturation: CGFloat = 0
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var brightness: CGFloat = 0
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var alpha: CGFloat = 0
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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't 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 self.getHue(&hue, saturation: &saturation, brightness: &brightness, alpha: &alpha) else {
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return self
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}
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return UIColor(
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hue: hue,
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saturation: saturation,
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brightness: (brightness + percentage),
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alpha: alpha
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)
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}
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}
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