forked from KolibriOS/kolibrios
55 lines
1.2 KiB
Lua
55 lines
1.2 KiB
Lua
|
--PALETTE Adjust: Shift Hue v0.9
|
||
|
|
--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
|
||
|
|
|
||
|
|
|
||
|
|
--Shift_degrees = 45
|
||
|
|
|
||
|
|
OK,Shift_degrees = inputbox("Shift Hue v0.9","Degrees", 45, 0,360,3);
|
||
|
|
|
||
|
|
|
||
|
|
--
|
||
|
|
function shiftHUE(r,g,b,deg) -- V1.3 R.Fhager 2007, adopted from Evalion
|
||
|
|
local c,h,mi,mx,d,s,p,i,f,q,t
|
||
|
|
c = {g,b,r}
|
||
|
|
mi = math.min(r,g,b)
|
||
|
|
mx = math.max(r,g,b); v = mx;
|
||
|
|
d = mx - mi;
|
||
|
|
s = 0; if mx ~= 0 then s = d/mx; end
|
||
|
|
p = 1; if g ~= mx then p = 2; if b ~= mx then p = 0; end; end
|
||
|
|
|
||
|
|
if s~=0 then
|
||
|
|
h=(deg/60+(6+p*2+(c[1+p]-c[1+(p+1)%3])/d))%6;
|
||
|
|
i=math.floor(h);
|
||
|
|
f=h-i;
|
||
|
|
p=v*(1-s);
|
||
|
|
q=v*(1-s*f);
|
||
|
|
t=v*(1-s*(1-f));
|
||
|
|
c={v,q,p,p,t,v}
|
||
|
|
r = c[1+i]
|
||
|
|
g = c[1+(i+4)%6]
|
||
|
|
b = c[1+(i+2)%6]
|
||
|
|
end
|
||
|
|
|
||
|
|
return r,g,b
|
||
|
|
end
|
||
|
|
--
|
||
|
|
|
||
|
|
if OK == true then
|
||
|
|
|
||
|
|
for c = 0, 255, 1 do
|
||
|
|
r,g,b = getcolor(c)
|
||
|
|
setcolor(c, shiftHUE(r,g,b,Shift_degrees))
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|