print.lua

local printer = peripheral.find("printer")

local w, h = 25, 21
local BARCODE_START = 128
local BARCODE_CHARS = 32

local function generateBarcode()
  local out = ""

  for y = 1, 4 do
    for x = 1, w do
      out = out .. string.char(math.random(BARCODE_START, BARCODE_START + BARCODE_CHARS))
    end
  end

  return out
end

local function printBarcode(barcode)
  local lines = math.ceil(#barcode / w)

  for y = 1, h + 2 do
    --local line = barcode:sub(y * w, math.min((y + 1) * w, #barcode))
    local line = ("A"):rep(w)
    -- printer.setCursorPos(1, (h - lines) + y)
    printer.setCursorPos(1, y)
    printer.write(line)
  end
end

printer.newPage()

--local barcode = generateBarcode()
--printBarcode(barcode)

for i = 1, 30 do
  printer.setCursorPos(1, i)
  printer.write(i)
end

printer.endPage()