//
// Swiftfin is subject to the terms of the Mozilla Public
// License, v2.0. If a copy of the MPL was not distributed with this
// file, you can obtain one at https://mozilla.org/MPL/2.0/.
//
// Copyright (c) 2022 Jellyfin & Jellyfin Contributors
//

import Foundation

func signPow(_ value: Float, _ exp: Float) -> Float {
    copysign(pow(abs(value), exp), value)
}

func linearTosRGB(_ value: Float) -> Int {
    let v = max(0, min(1, value))
    if v <= 0.0031308 { return Int(v * 12.92 * 255 + 0.5) }
    else { return Int((1.055 * pow(v, 1 / 2.4) - 0.055) * 255 + 0.5) }
}

func sRGBToLinear<Type: BinaryInteger>(_ value: Type) -> Float {
    let v = Float(Int64(value)) / 255
    if v <= 0.04045 { return v / 12.92 }
    else { return pow((v + 0.055) / 1.055, 2.4) }
}