imagedisp.lua

function drawPx(x, y, color, mon)
  mon.setBackgroundColor(color)
  mon.setCursorPos(x, y)
  mon.write(" ")
end

print("Image Display v0.0.1")

local url = ...
if url == nil then
  print("Usage: imagedisp <URL>")
end

-- Get monitor's direction  
print("Detecting monitor...")
local p_dirs = peripheral.getNames()
local monitorSide = ""
for i = 1, #p_dirs do
  periType = peripheral.getType(p_dirs[i])
  if periType == "monitor" then
    monitorSide = p_dirs[i]
    print("Monitor found on "..monitorSide.." side!")
    break
  end
end

-- Get monitor's handler
local mon = peripheral.wrap(monitorSide)
mon.setTextScale(0.5)

-- Get image from Internet
print("Downloading image from "..url.."...")
local width, height = mon.getSize()
local imgHandler = http.get("https://qwertyman0213.npkn.net/ccconverter/?image="..url.."&width="..width.."&height="..height)
print("Loading image...")
local imageText = imgHandler.readAll()

local hex_table = {["0"] = 1, ["1"] = 2, ["2"] = 4, ["3"] = 8, ["4"] = 16, ["5"] = 32, ["6"] = 64, ["7"] = 128, ["8"] = 256, ["9"] = 512, ["a"] = 1024, ["b"] = 2048, ["c"] = 4096, ["d"] = 8192, ["e"] = 16384, ["f"] = 32768}
local crrX = 1
local crrY = 1
for i=1, #imageText do
  local char = string.sub(imageText, i, i)
  if char == "\n" then
    crrY = crrY + 1
    crrX = 1
  else
    local colorValue = hex_table[char]
    drawPx(crrX, crrY, colorValue, mon)
    crrX = crrX + 1
  end
end

print("Done!")