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package.path="/?;/?.lua;"..package.path
local printer = peripheral.wrap"right"
local load_pnm = require"load_pnm".load
local file,err = io.open(arg[1],"rb")
if err then error("io.open: "..err) end
local ff = file:read("a")
local img = load_pnm(ff)
local W,H = img.width, img.height
local function c2c(col)
local r = math.floor(col[1]*255)
local g = math.floor(col[2]*255)
local b = math.floor(col[3]*255)
return b + 0x100*g + 0x10000*r
end
local function print_tile(tilex,tiley)
print("tile ",tilex,tiley)
local tilex0 = tilex-1
local tiley0 = tiley-1
local xm = (8*tilex0)+1
local ym = (8*tiley0)+1
local xM = math.min(W,xm+7)
local yM = math.min(H,ym+7)
print(" x from ",xm,"to",xM)
print(" y from ",ym,"to",yM)
-- really i should have called this u and v instead of x and y. joker emoji
printer.reset()
shapes = {}
for px = xm,xM do
for py = ym,yM do
local offx = px-xm
local offy = py-ym
table.insert(shapes,{
2*offx, 14-2*offy, 15,
2*offx+2, 16-2*offy, 16,
texture="sc-peripherals:block/white",
tint=c2c(img[py][px])
})
end
end
printer.addShapes(shapes)
printer.setTooltip("("..tilex..","..tiley..")")
printer.commit(1)
end
-- 0...
for tilex = 1, math.ceil(W/8) do
for tiley = 1, math.ceil(H/8) do
print_tile(tilex,tiley)
end
end
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