123 lines
3.9 KiB
Swift
123 lines
3.9 KiB
Swift
/*
|
|
* DynamicColor
|
|
*
|
|
* Copyright 2015-present Yannick Loriot.
|
|
* http://yannickloriot.com
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
#if os(iOS) || os(tvOS) || os(watchOS)
|
|
import UIKit
|
|
#elseif os(OSX)
|
|
import AppKit
|
|
#endif
|
|
|
|
// MARK: RGBA Color Space
|
|
|
|
public extension DynamicColor {
|
|
/**
|
|
Initializes and returns a color object using the specified opacity and RGB component values.
|
|
|
|
Notes that values out of range are clipped.
|
|
|
|
- Parameter r: The red component of the color object, specified as a value from 0.0 to 255.0.
|
|
- Parameter g: The green component of the color object, specified as a value from 0.0 to 255.0.
|
|
- Parameter b: The blue component of the color object, specified as a value from 0.0 to 255.0.
|
|
- Parameter a: The opacity value of the color object, specified as a value from 0.0 to 255.0. The default value is 255.
|
|
*/
|
|
public convenience init(r: CGFloat, g: CGFloat, b: CGFloat, a: CGFloat = 255) {
|
|
self.init(red: clip(r, 0, 255) / 255, green: clip(g, 0, 255) / 255, blue: clip(b, 0, 255) / 255, alpha: clip(a, 0, 255) / 255)
|
|
}
|
|
|
|
// MARK: - Getting the RGBA Components
|
|
|
|
/**
|
|
Returns the RGBA (red, green, blue, alpha) components.
|
|
|
|
- returns: The RGBA components as a tuple (r, g, b, a).
|
|
*/
|
|
public final func toRGBAComponents() -> (r: CGFloat, g: CGFloat, b: CGFloat, a: CGFloat) {
|
|
var r: CGFloat = 0, g: CGFloat = 0, b: CGFloat = 0, a: CGFloat = 0
|
|
|
|
#if os(iOS) || os(tvOS) || os(watchOS)
|
|
getRed(&r, green: &g, blue: &b, alpha: &a)
|
|
|
|
return (r, g, b, a)
|
|
#elseif os(OSX)
|
|
if isEqual(DynamicColor.black) {
|
|
return (0, 0, 0, 0)
|
|
}
|
|
else if isEqual(DynamicColor.white) {
|
|
return (1, 1, 1, 1)
|
|
}
|
|
|
|
getRed(&r, green: &g, blue: &b, alpha: &a)
|
|
|
|
return (r, g, b, a)
|
|
#endif
|
|
}
|
|
|
|
#if os(iOS) || os(tvOS) || os(watchOS)
|
|
/**
|
|
The red component as CGFloat between 0.0 to 1.0.
|
|
*/
|
|
public final var redComponent: CGFloat {
|
|
return toRGBAComponents().r
|
|
}
|
|
|
|
/**
|
|
The green component as CGFloat between 0.0 to 1.0.
|
|
*/
|
|
public final var greenComponent: CGFloat {
|
|
return toRGBAComponents().g
|
|
}
|
|
|
|
/**
|
|
The blue component as CGFloat between 0.0 to 1.0.
|
|
*/
|
|
public final var blueComponent: CGFloat {
|
|
return toRGBAComponents().b
|
|
}
|
|
|
|
/**
|
|
The alpha component as CGFloat between 0.0 to 1.0.
|
|
*/
|
|
public final var alphaComponent: CGFloat {
|
|
return toRGBAComponents().a
|
|
}
|
|
#endif
|
|
|
|
// MARK: - Setting the RGBA Components
|
|
|
|
/**
|
|
Creates and returns a color object with the alpha increased by the given amount.
|
|
|
|
- parameter amount: CGFloat between 0.0 and 1.0.
|
|
- returns: A color object with its alpha channel modified.
|
|
*/
|
|
public final func adjustedAlpha(amount: CGFloat) -> DynamicColor {
|
|
let components = toRGBAComponents()
|
|
let normalizedAlpha = clip(components.a + amount, 0, 1)
|
|
|
|
return DynamicColor(red: components.r, green: components.g, blue: components.b, alpha: normalizedAlpha)
|
|
}
|
|
}
|