--SCENE: Remap pic to RGB, diag.dith
--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/>
-- Set Palette (to a predefined one)
colors = {{ 0, 0, 0},
{255, 0, 0},
{ 0,255, 0},
{ 0, 0,255}
}
chm = {1,0,0}
for c = 1, #colors, 1 do
setcolor(c-1,colors[c][1],colors[c][2],colors[c][3])
end
for c = #colors, 255, 1 do
setcolor(c,0,0,0)
end
w, h = getpicturesize()
for y = 0, h - 1, 1 do
for x = 0, w - 1, 1 do
r,g,b = getbackupcolor(getbackuppixel(x,y));
rn = r * chm[1+(y+0+x)%3]
gn = g * chm[1+(y+1+x)%3]
bn = b * chm[1+(y+2+x)%3]
n = matchcolor(rn,gn,bn);
putpicturepixel(x, y, n);
end
end