Module:Color contrast: Difference between revisions

Module:Color contrast (edit)

Revision as of 18:41, 30 July 2015

1,267 bytes added , 9 years ago

add support for hsl

Anonymous user

m>Frietjes

@@ Line 16: / Line 16: @@
 	end
 	return v
+end
+local function hsl2lum( h, s, l )
+	local lum = ''
+	if ( 0 <= h and h < 360 and 0 <= s and s <= 1 and 0 <= l and l <= 1 ) then
+		local c = (1 - abs(2*l - 1))*s
+		local x = c*(1 - abs( mod(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 = R + c
+			B = G + x
+		elseif( 180 <= h and h < 240 ) then
+			G = R + x
+			B = G + c
+		elseif( 240 <= h and h < 300 ) then
+			R = R + x
+			B = G + c
+		elseif( 300 <= h and h < 360 ) then
+			R = R + c
+			B = G + x
+		end
+		lum = 0.2126 * sRGB(R) + 0.7152 * sRGB(G) + 0.0722 * sRGB(B)
+	end
+	return lum
 end
@@ Line 35: / Line 67: @@
 	end
 	-- remove leading # (if there is one) and whitespace
-	c = mw.ustring.match(c, '^[%s#]*([a-f0-9]*)[%s]*$')
+	c = mw.ustring.match(c, '^[%s#]*([a-f0-9]*)[%s;]*$')
+   	-- convert from hsl
+   	if mw.ustring.match(c,'^hsl%([%s]*[0-9][0-9]*[%s]*,[%s]*[0-9][0-9]*%%[%s]*,[%s]*[0-9][0-9]*%%[%s]*%)$') then
+		local h = mw.ustring.match(c,'^hsl%[%s]*([0-9][0-9]*)[%s]*,[%s]*[0-9][0-9]*%%[%s]*,[%s]*[0-9][0-9]*%%[%s]*%$')
+		local s = mw.ustring.match(c,'^hsl%[%s]*[0-9][0-9]*[%s]*,[%s]*([0-9][0-9]*)%%[%s]*,[%s]*[0-9][0-9]*%%[%s]*%$')
+		local l = mw.ustring.match(c,'^hsl%[%s]*[0-9][0-9]*[%s]*,[%s]*[0-9][0-9]*%%[%s]*,[%s]*([0-9][0-9]*)%%[%s]*%$')
+		return hsl2rgb(tonumber(h), tonumber(s)/100, tonumber(l)/100)
+   	end
 	-- split into rgb