18 lines
796 B
Lua
18 lines
796 B
Lua
-- flip picture - Copyright 2010 Paulo Silva
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-- 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/>
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w,h=getpicturesize();
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ok,flipx,flipy=inputbox("flip picture","flip x",1,0,1,-1,"flip y",0,0,1,-1);
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if ok==true then
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if flipx==1 then
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for y=0,h-1,1 do
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for x=0,w/2,1 do
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c1=getpicturepixel(x,y);c2=getpicturepixel(w-x-1,y)
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putpicturepixel(x,y,c2);putpicturepixel(w-x-1,y,c1)
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end;end
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else
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for y=0,h/2,1 do
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for x=0,w-1,1 do
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c1=getpicturepixel(x,y);c2=getpicturepixel(x,h-y-1)
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putpicturepixel(x,y,c2);putpicturepixel(x,h-y-1,c1)
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end;end;end;end
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