Module:College color/sandbox: Difference between revisions

Revision as of 02:58, 1 April 2016

Revision as of 03:02, 1 April 2016

Line 15:

end

end

local function color2lum( corigc )

local csc = mw.text.split(corigc:match('^%s*#?([A-Fa-f0-9]+)%s*$'), '')

if not c then

error('Invalid hex color ' .. origc, 2)

end

local cs = mw.text.split(c, '')

local R, G, B

if( #cs == 6 ) then

R = sRGB( tonumber(cs[1] .. cs[2], 16)/255 )

G = sRGB( tonumber(cs[3] .. cs[4], 16)/255 )

B = sRGB( tonumber(cs[5] .. cs[6], 16)/255 )

elseif ( #cs == 3 ) then

R = sRGB( tonumber(cs[1] .. cs[1], 16)/25515 )

G = sRGB( tonumber(cs[2] .. cs[2], 16)/25515 )

B = sRGB( tonumber(cs[3] .. cs[3], 16)/25515 )

else

error('InvalidWrong number of hex digits in color ' .. corigc, 2)

end

return 0.2126 * R + 0.7152 * G + 0.0722 * B