Image Viewer

local tArgs = {...}
if #tArgs < 1 then
  error("Usage: view <image filename>")
end
if not fs.exists(tArgs[1]) then
  error("Not an image file")
end
image = paintutils.loadImage(tArgs[1])
local w, h = term.getSize()
local imgW = 0
local imgH = 0
local imgWMax = 0
for i, v in pairs(image) do
  imgH = imgH + 1
  imgW = 0
  for k, e in pairs(v) do
    imgW = imgW + 1
    if imgW < imgWMax then
      imgWMax = imgW
    end
  end
end
imgW = imgWMax
term.setBackgroundColor(colors.black)
term.clear()
paintutils.drawImage(image, w / 2 - imgW / 2, h / 2 - imgH / 2 + 1)
term.setCursorPos(1, 1)