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|
(.require
[library
[lux (.except)
[abstract
[monad (.only do)]
[\\specification
["$[0]" equivalence]
["$[0]" hash]
["$[0]" monoid]]]
[data
[collection
["[0]" list]]]
[math
["[0]" random (.only Random) (.use "[1]#[0]" functor)]
[number
["n" nat]
["f" frac]
["r" rev]
["[0]" int]]]
[test
["_" property (.only Test)]]]]
[\\library
["[0]" / (.only)
["[0]" rgb]]]
["[0]" /
["[1][0]" rgb]
["[1][0]" named]
["[1][0]" terminal]])
(def .public random
(Random /.Color)
(random#each /.of_rgb /rgb.random))
(def scale
(-> Nat Frac)
(|>> .int int.frac))
(def square
(-> Frac Frac)
(f.pow +2.0))
(def square_root
(-> Frac Frac)
(f.pow +0.5))
(def (distance/1 from to)
(-> Frac Frac Frac)
(square_root
(square
(f.- from to))))
(def (distance/3 from to)
(-> /.Color /.Color Frac)
(let [[fr fg fb] (/.rgb from)
[tr tg tb] (/.rgb to)]
(square_root
(all f.+
(|> (scale (rgb.number tr)) (f.- (scale (rgb.number fr))) square)
(|> (scale (rgb.number tg)) (f.- (scale (rgb.number fg))) square)
(|> (scale (rgb.number tb)) (f.- (scale (rgb.number fb))) square)))))
(def rgb_error_margin
+1.8)
(with_template [<field>]
[(def (<field> color)
(-> /.Color Frac)
(let [[hue saturation luminance] (/.hsl color)]
<field>))]
[saturation]
[luminance]
)
(def (encoding expected)
(-> /.Color Test)
(all _.and
(_.coverage [/.rgb /.of_rgb]
(|> expected /.rgb /.of_rgb
(at /.equivalence = expected)))
(_.coverage [/.HSL /.hsl /.of_hsl]
(|> expected /.hsl /.of_hsl
(distance/3 expected)
(f.<= ..rgb_error_margin)))
(_.coverage [/.HSB /.hsb /.of_hsb]
(|> expected /.hsb /.of_hsb
(distance/3 expected)
(f.<= ..rgb_error_margin)))
(_.coverage [/.CMYK /.cmyk /.of_cmyk]
(|> expected /.cmyk /.of_cmyk
(distance/3 expected)
(f.<= ..rgb_error_margin)))
))
(def transformation
Test
(do random.monad
[colorful (|> ..random
(random.only (function (_ color) (|> (distance/3 color /.black) (f.>= +100.0))))
(random.only (function (_ color) (|> (distance/3 color /.white) (f.>= +100.0)))))
mediocre (|> ..random
(random.only (|>> saturation
((function (_ saturation)
(and (f.>= +0.25 saturation)
(f.<= +0.75 saturation)))))))
ratio (|> random.safe_frac (random.only (f.>= +0.5)))]
(all _.and
(_.coverage [/.darker /.brighter]
(and (f.<= (distance/3 colorful /.black)
(distance/3 (/.darker ratio colorful) /.black))
(f.<= (distance/3 colorful /.white)
(distance/3 (/.brighter ratio colorful) /.white))))
(_.coverage [/.interpolated]
(and (f.<= (distance/3 colorful /.black)
(distance/3 (/.interpolated ratio /.black colorful) /.black))
(f.<= (distance/3 colorful /.white)
(distance/3 (/.interpolated ratio /.white colorful) /.white))))
(_.coverage [/.saturated]
(f.> (saturation mediocre)
(saturation (/.saturated ratio mediocre))))
(_.coverage [/.un_saturated]
(f.< (saturation mediocre)
(saturation (/.un_saturated ratio mediocre))))
(_.coverage [/.gray_scale]
(let [gray'ed (/.gray_scale mediocre)]
(and (f.= +0.0
(saturation gray'ed))
(|> (luminance gray'ed)
(f.- (luminance mediocre))
f.abs
(f.<= ..rgb_error_margin)))))
)))
(def palette
Test
(_.for [/.Spread /.Palette]
(do [! random.monad]
[eH (at ! each (|>> f.abs (f.% +0.9) (f.+ +0.05))
random.safe_frac)
.let [eS +0.5]
variations (at ! each (|>> (n.% 3) (n.+ 2)) random.nat)
.let [max_spread (f./ (|> variations ++ .int int.frac)
+1.0)
min_spread (f./ +2.0 max_spread)
spread_space (f.- min_spread max_spread)]
spread (at ! each (|>> f.abs (f.% spread_space) (f.+ min_spread))
random.safe_frac)]
(`` (all _.and
(,, (with_template [<brightness> <palette>]
[(_.coverage [<palette>]
(let [eB <brightness>
expected (/.of_hsb [eH eS eB])
palette (<palette> spread variations expected)]
(and (n.= variations (list.size palette))
(not (list.any? (at /.equivalence = expected) palette)))))]
[+1.0 /.analogous]
[+0.5 /.monochromatic]
))
(,, (with_template [<palette>]
[(_.coverage [<palette>]
(let [expected (/.of_hsb [eH eS +0.5])
[c0 c1 c2] (<palette> expected)]
(and (at /.equivalence = expected c0)
(not (at /.equivalence = expected c1))
(not (at /.equivalence = expected c2)))))]
[/.triad]
[/.clash]
[/.split_complement]))
(,, (with_template [<palette>]
[(_.coverage [<palette>]
(let [expected (/.of_hsb [eH eS +0.5])
[c0 c1 c2 c3] (<palette> expected)]
(and (at /.equivalence = expected c0)
(not (at /.equivalence = expected c1))
(not (at /.equivalence = expected c2))
(not (at /.equivalence = expected c3)))))]
[/.square]
[/.tetradic]))
)))))
(def .public test
Test
(<| (_.covering /._)
(_.for [/.Color])
(do [! random.monad]
[expected ..random]
(all _.and
(_.for [/.equivalence]
($equivalence.spec /.equivalence ..random))
(_.for [/.hash]
($hash.spec /.hash ..random))
(_.for [/.addition]
($monoid.spec /.equivalence /.addition ..random))
(_.for [/.subtraction]
($monoid.spec /.equivalence /.addition ..random))
(..encoding expected)
(_.coverage [/.complement]
(let [~expected (/.complement expected)
(open "/#[0]") /.equivalence]
(and (not (/#= expected ~expected))
(/#= expected (/.complement ~expected)))))
(_.coverage [/.black /.white]
(and (at /.equivalence = /.white (/.complement /.black))
(at /.equivalence = /.black (/.complement /.white))))
..transformation
..palette
(_.for [/.Alpha /.Pigment]
(all _.and
(_.coverage [/.transparent /.opaque]
(and (r.= /.opaque (-- /.transparent))
(r.= /.transparent (++ /.opaque))))
(_.coverage [/.translucent]
(r.= /.transparent (r.+ /.translucent /.translucent)))
))
/rgb.test
/named.test
/terminal.test
))))
|
