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slight refactor

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a dinosaur 2024-08-17 21:54:26 +10:00
parent 64db513f62
commit 55d47a2d2f
1 changed files with 11 additions and 35 deletions
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46
Sources/Voxelotl/Color.swift
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@ -46,21 +46,16 @@ public extension Color where T: FixedWidthInteger {
init(r newR: T, g newG: T, b newB: T) {
self.init(r: newR, g: newG, b: newB, a: Self.one)
}
}
public extension Color where T: UnsignedInteger & FixedWidthInteger {
init<U: BinaryFloatingPoint>(_ other: Color<U>) {
self.init(
r: T((other.r * U(0xFF)).clamp(0, 0xFF)),
g: T((other.g * U(0xFF)).clamp(0, 0xFF)),
b: T((other.b * U(0xFF)).clamp(0, 0xFF)),
a: T((other.a * U(0xFF)).clamp(0, 0xFF)))
r: T((other.r * U(T.max)).clamp(0, U(T.max))),
g: T((other.g * U(T.max)).clamp(0, U(T.max))),
b: T((other.b * U(T.max)).clamp(0, U(T.max))),
a: T((other.a * U(T.max)).clamp(0, U(T.max))))
}
func mix(_ other: Self, _ n: Float) -> Self {
Self(Color<Float>(self).mix(Color<Float>(other), n.saturated))
}
var linear: Self { Self(Color<Float>(self).linear) }
var sRGB: Self { Self(Color<Float>(self).sRGB) }
}
public extension Color where T == UInt8 {
@ -79,27 +74,13 @@ public extension Color where T == UInt8 {
b: UInt8((c & 0x0000FF) >> 0))
}
var sRGB: Self {
return Self(
r: sRGB8FromLinear8Table[Int(r)],
g: sRGB8FromLinear8Table[Int(g)],
b: sRGB8FromLinear8Table[Int(b)],
a: a)
func mix(_ other: Self, _ n: Float) -> Self {
Self(Color<Float>(self).mix(Color<Float>(other), n.saturated))
}
}
fileprivate var sRGB8FromLinear8Table: [UInt8] = {
(0..<0x100).map { i in
var x = Double(i) / 0xFF
if x < 0.0031308 {
x *= 12.92
} else {
x = 1.055 * pow(abs(x), 1 / 2.4) - 0.055
}
x = floor((x * 0xFF) + 0.5)
return UInt8(truncating: NSNumber(value: x))
}
}()
var linear: Self { Self(Color<Float>(self).linear) }
var sRGB: Self { Self(Color<Float>(self).sRGB) }
}
public extension Color where T: BinaryFloatingPoint {
@inline(__always) static var one: T { T(1) }
@ -166,12 +147,7 @@ public extension Color where T: BinaryFloatingPoint {
} else if x < 0.0031308 {
x * 12.92
} else {
#if false
// Approximation
1.13005 * sqrt(abs(x - 0.00228)) - 0.13448 * x + 0.005719
#else
T(1.055 * pow(Double(abs(x)), 1 / 2.4) - 0.055)
#endif
}
}
}