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Module:Color contrast: Difference between revisions

m>Frietjes
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m (2 revisions imported from wikipedia:Module:Color_contrast: see Topic:Vtixlm0q28eo6jtf)
 
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--
--
-- This module implements  
-- This module implements  
--  {{Color contrast ration}}
--  {{Color contrast ratio}}
--  {{Greater color contrast ratio}}
--  {{ColorToLum}}
--  {{ColorToLum}}
--  {{RGBColorToLum}}
--  {{RGBColorToLum}}
--
--
local p = {}
local p = {}
local HTMLcolor = mw.loadData( 'Module:Color contrast/colors' )


local function sRGB ( v )  
local function sRGB ( v )  
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else
else
v = math.pow((v+0.055)/1.055, 2.4)
v = math.pow((v+0.055)/1.055, 2.4)
    end
end
return v
return v
end
local function rgbdec2lum( R, G, B )
if ( 0 <= R and R < 256 and 0 <= G and G < 256 and 0 <= B and B < 256 ) then
return 0.2126 * sRGB(R/255) + 0.7152 * sRGB(G/255) + 0.0722 * sRGB(B/255)
else
return ''
end
end
local function hsl2lum( h, s, l )
if ( 0 <= h and h < 360 and 0 <= s and s <= 1 and 0 <= l and l <= 1 ) then
local c = (1 - math.abs(2*l - 1))*s
local x = c*(1 - math.abs( math.fmod(h/60, 2) - 1) )
local m = l - c/2
local r, g, b = m, m, m
if( 0 <= h and h < 60 ) then
r = r + c
g = g + x
elseif( 60 <= h and h < 120 ) then
r = r + x
g = g + c
elseif( 120 <= h and h < 180 ) then
g = g + c
b = b + x
elseif( 180 <= h and h < 240 ) then
g = g + x
b = b + c
elseif( 240 <= h and h < 300 ) then
r = r + x
b = b + c
elseif( 300 <= h and h < 360 ) then
r = r + c
b = b + x
end
return rgbdec2lum(255*r, 255*g, 255*b)
else
return ''
end
end
end


local function color2lum( c )
local function color2lum( c )
 
if (c == nil) then
if (c == nil) then
return ''
return ''
end
end


local HTMLcolor = {
-- html '#' entity
white = 1,
c = c:gsub("&#35;", "#")
silver = 0.52711512570581,
 
gray = 0.2158605001139,
-- whitespace
black = 0,
c = c:match( '^%s*(.-)[%s;]*$' )
red = 0.2126,
maroon = 0.045891942324215,
yellow = 0.9278,
olive = 0.20027537200568,
lime = 0.7152,
green = 0.15438342968146,
aqua = 0.7874,
teal = 0.16996855778968,
blue = 0.0722,
navy = 0.015585128108224,
fuchsia = 0.2848,
purple = 0.061477070432439,
orange = 0.4817026703631,


gold = 0.69860877428159,
-- unstrip nowiki strip markers
pink = 0.63271070702466,
c = mw.text.unstripNoWiki(c)
lightpink = 0.58566152734898,
hotpink = 0.34658438169715,
deeppink = 0.23866895828276,
palevioletred = 0.28754994117889,
mediumvioletred = 0.14371899849357,
lightsalmon = 0.4780675225206,
salmon = 0.36977241527596,
darksalmon = 0.40541471563381,
lightcoral = 0.35522120733135,
indianred = 0.21406134963884,
crimson = 0.16042199953026,
firebrick = 0.10724525535015,
darkred = 0.054889674531132,
orangered = 0.25516243753416,
tomato = 0.30638612719415,
coral = 0.37017930872924,
darkorange = 0.40016167026524,
lightyellow = 0.98161818392882,
lemonchiffon = 0.94038992245622,
lightgoldenrodyellow = 0.93348351018297,
papayawhip = 0.87797100199835,
moccasin = 0.80083000991567,
peachpuff = 0.74905589878251,
palegoldenrod = 0.78792647887614,
khaki = 0.77012343394121,
darkkhaki = 0.45747326349994,
cornsilk = 0.93562110372965,
blanchedalmond = 0.85084439608156,
bisque = 0.80732327372979,
navajowhite = 0.76519682342785,
wheat = 0.74909702820482,
burlywood = 0.51559844533893,
tan = 0.48237604163921,
rosybrown = 0.32319457649407,
sandybrown = 0.46628543696283,
goldenrod = 0.41919977809569,
darkgoldenrod = 0.27264703559993,
peru = 0.30113074877936,
chocolate = 0.23898526114557,
saddlebrown = 0.097922285020521,
sienna = 0.