RGBAf.kt

package com.soywiz.korim.color

import com.soywiz.korio.util.niceStr

class RGBAf(
	private var _r: Float = 1f,
	private var _g: Float = 1f,
	private var _b: Float = 1f,
	private var _a: Float = 1f
) {
	private var dirty = true

	var r: Float; set(v) = run { _r = v; makeDirty() }; get() = _r
	var g: Float; set(v) = run { _g = v; makeDirty() }; get() = _g
	var b: Float; set(v) = run { _b = v; makeDirty() }; get() = _b
	var a: Float; set(v) = run { _a = v; makeDirty() }; get() = _a

	var rd: Double; set(v) = run { _r = v.toFloat(); makeDirty() }; get() = _r.toDouble()
	var gd: Double; set(v) = run { _g = v.toFloat(); makeDirty() }; get() = _g.toDouble()
	var bd: Double; set(v) = run { _b = v.toFloat(); makeDirty() }; get() = _b.toDouble()
	var ad: Double; set(v) = run { _a = v.toFloat(); makeDirty() }; get() = _a.toDouble()

	private fun makeDirty() {
		dirty = true
	}

	private var _rgba: Int = -1
	val rgba: Int get() {
		if (dirty) {
			dirty = false
			_rgba = RGBA.packfFast(_r, _g, _b, _a)
		}
		return _rgba
	}

	fun setTo(r: Float, g: Float, b: Float, a: Float) {
		this._r = r
		this._g = g
		this._b = b
		this._a = a
		makeDirty()
	}

	fun copyFrom(that: RGBAf) = setTo(that.r, that.g, that.b, that.a)
	fun setToMultiply(that: RGBAf) = setToMultiply(that.r, that.g, that.b, that.a)
	fun setToMultiply(r: Float, g: Float, b: Float, a: Float) = setTo(this.r * r, this.g * g, this.b * b, this.a * a)

	fun toRGBA(): Int = RGBA.packFast((r * 255).toInt() and 0xFF, (g * 255).toInt() and 0xFF, (b * 255).toInt() and 0xFF, (a * 255).toInt() and 0xFF)

	fun setToIdentity() = setTo(1f, 1f, 1f, 1f)

	override fun toString(): String = "RGBAf(${r.niceStr}, ${g.niceStr}, ${b.niceStr}, ${a.niceStr})"
}

inline fun RGBAf(r: Number, g: Number, b: Number, a: Number) = RGBAf(r.toFloat(), g.toFloat(), b.toFloat(), a.toFloat())