-- a pixelation filter implemented in lua
--

hlines = 16
vlines = 16

local x,y
local hpix=width/hlines
local vpix=height/vlines

for y = 0, height-1 do
  for x = 0, width-1 do
     local r,g,b,a
     local nx,ny
     nx=math.floor(x/hpix)*hpix
     ny=math.floor(y/vpix)*vpix
     r,g,b,a=get_rgba(nx,ny)
     set_rgba(x,y,r,g,b,a)
   end
   progress(y/height)
end