gui.color

import gui.color

func main:
    c := color.Rgba(51, 102, 170, 0.5)
    println "r", c.r, "g", c.g, "b", c.b, "a", c.a, "current", c.current
    wide := color.New(1.093, -0.227, -0.15, 1.0)
    println "wide gamut red keeps channels outside 0 to 1:", wide.r, wide.g
    println "argb", color.Argb(c), "back", color.Css(color.FromArgb(color.Argb(c)))
    println "argb clamps", color.Argb(wide)
end

import gui.color

func main:
    each text in ["#3366aa", "rgb(51, 102, 170)", "hsl(210, 50%, 40%)", "oklch(0.7 0.25 30)", "light dark(white, #222)", "قرمز", "rgb(51, 102)", "redd"]:
        mut c := color.Color {}
        if color.Parse(text, c):
            println text, "=>", color.Css(c)
        else:
            println text, "=>", color.Error(text)
        end
    end
end

import gui.color

func main:
    println color.Css(color.Rgb(51, 102, 170))
    println color.Css(color.Rgba(51, 102, 170, 0.5))
    println color.Css(color.Hex(0x3366aa))
    println color.Css(color.New(0.2, 0.4, 0.6, 1.0))
    println color.Css(color.Hsl(210.0, 0.5, 0.4))
    println color.Css(color.Hwb(194.0, 0.0, 0.0))
    println color.Css(color.Lab(29.2345, 39.3825, 20.0664))
    println color.Css(color.Lch(52.2345, 72.2, 56.2))
    println color.Css(color.Oklab(0.40101, 0.1147, 0.0453))
    println color.Css(color.Oklch(0.7, 0.25, 30.0))
    println color.Css(color.Cmyk(0.0, 0.4, 0.6, 0.1))
    println color.Css(color.WithAlpha(color.Hex(0x3366aa), 0.25))
    println color.Css(color.Current())
end

import gui.color

func main:
    c := color.LightDark(color.Hex(0x3366aa), color.Rgb(200, 220, 255))
    println color.Css(c), color.HasDark(c), color.HasDark(color.Hex(0x3366aa))
    println "light", color.Css(color.Light(c)), "dark", color.Css(color.Dark(c))
    println "fields", c.has_dark, c.dark_r, c.dark_g, c.dark_b, c.dark_a, c.dark_current
    mut t := color.Color {}
    if color.Parse("light dark(current, white)", t):
        println color.Css(t), t.current, t.dark_current
    end
    println "mix keeps both", color.Css(color.Mix(c, color.Hex(0xffffff), 0.5))
end

import gui.color

func show(text: str):
    mut c := color.Color {}
    if color.Parse(text, c):
        println text
        println "  css   ", color.Css(c)
        println "  source", color.Source(c)
        println "  in sRGB", color.InGamut(c), "same as #f00", color.Equal(c, color.Hex(0xff0000))
    end
end

func main:
    show("red")
    show("rgba(0, 0, 0, 0.25)")
    show("color(display p3, 1, 0, 0)")
    show("color(rec2020, 1, 0, 0)")
    show("current")
end

import gui.color

func main:
    red := color.Hex(0xff0000)
    blue := color.Hex(0x0000ff)
    println "Mix 30%", color.Css(color.Mix(red, blue, 0.3))
    each space in ["oklab", "oklch", "srgb", "hsl"]:
        println "MixIn", space, color.Css(color.MixIn(red, blue, 0.5, space))
    end
    clear := color.Rgba(255, 0, 0, 0.0)
    repeat 5 in i:
        t := i as f64 / 4.0
        println "Lerp", t, color.Css(color.Lerp(clear, blue, t))
    end
end

import gui.color
import math

func r2(v: f64): f64:
    ret math.Round(v * 100.0) / 100.0
end

func main:
    white := color.Hex(0xffffff)
    each hex in [0x777777, 0x3366aa, 0x1a1a1a]:
        c := color.Hex(hex)
        println color.Css(c), "luminance", r2(color.Luminance(c)), "contrast on white", r2(color.Contrast(c, white))
    end
    base := color.Hex(0x3366aa)
    println "lighter", color.Css(color.Lighten(base, 0.1)), "darker", color.Css(color.Darken(base, 0.1))
end