samples_2.4 => samples

share/grafx2/scripts/samples/brush/GrayscaleDesat.lua

@@ -0,0 +1,36 @@
+--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