package ui

import (
	"image/color"
	"math"
)

func mixColors(a, b color.Color, percent float64) color.Color {
	rgba := func(c color.Color) (r, g, b, a uint8) {
		r16, g16, b16, a16 := c.RGBA()
		return uint8(r16 >> 8), uint8(g16 >> 8), uint8(b16 >> 8), uint8(a16 >> 8)
	}
	lerp := func(x, y uint8) uint8 {
		return uint8(math.Round(float64(x) + percent*(float64(y)-float64(x))))
	}
	r1, g1, b1, a1 := rgba(a)
	r2, g2, b2, a2 := rgba(b)

	return color.RGBA{
		R: lerp(r1, r2),
		G: lerp(g1, g2),
		B: lerp(b1, b2),
		A: lerp(a1, a2),
	}
}