37 lines
950 B
Lua
37 lines
950 B
Lua
--BRUSH Remap: Grayscale (desaturate)
|
|
--by Richard Fhager
|
|
--http://hem.fyristorg.com/dawnbringer/
|
|
|
|
-- Copyright 2010 Richard Fhager
|
|
--
|
|
-- This program is free software; you can redistribute it and/or
|
|
-- modify it under the terms of the GNU General Public License
|
|
-- as published by the Free Software Foundation; version 2
|
|
-- of the License. See <http://www.gnu.org/licenses/>
|
|
|
|
-- This script was adopted from Evalion, a Javascript codecrafting/imageprocessing project
|
|
--http://goto.glocalnet.net/richard_fhager/evalion/evalion.html
|
|
|
|
|
|
percent = 100
|
|
|
|
--
|
|
function desaturate(percent,r,g,b) -- V1.0 by Richard Fhager
|
|
p = percent / 100
|
|
a = (math.min(math.max(r,g,b),255) + math.max(math.min(r,g,b),0)) * 0.5 * p
|
|
r = r + (a-r*p)
|
|
g = g + (a-g*p)
|
|
b = b + (a-b*p)
|
|
return r,g,b
|
|
end
|
|
--
|
|
|
|
|
|
w, h = getbrushsize()
|
|
|
|
for x = 0, w - 1, 1 do
|
|
for y = 0, h - 1, 1 do
|
|
putbrushpixel(x, y, matchcolor(desaturate(percent,getcolor(getbrushpixel(x,y)))));
|
|
end
|
|
end
|