conv

#!/usr/bin/env luajit

require 'table'
require 'fi'

local ffi = require 'ffi'
if ffi.os == 'Windows' then
	for k, v in ipairs(arg) do
		arg[k] = a2u(v)
	end
end

num = table.getn(arg)
if num == 0 then
	convert('*.png', 'bmp')
	convert('*.jpg', 'bmp')
	convert('*.tga', 'bmp')
	convert('*.tif*', 'bmp')
elseif num == 1 then
	if arg[1] == '24' or arg[1] == '32' or arg[1] == '8' then
		convbpp('*.bmp', tonumber(arg[1]), 'bmp')
		convbpp('*.png', tonumber(arg[1]), 'png', 9)
	else convert('*.bmp', arg[1])
	end
elseif num == 2 then
	convert(arg[1], arg[2])
else
	if arg[2] == '24' or arg[2] == '32' or arg[2] == '8' then
		convbpp(arg[1], tonumber(arg[2]), arg[3])
	else convert(arg[1], arg[2], tonumber(arg[3]))
	end
end