initialize_window_geometry()

  if arg[1] == '-geometry' then
    initialize_window_geometry(arg[2])
    table.remove(arg, 2)
    table.remove(arg, 1)
  else
    initialize_window_geometry()
  end

function initialize_window_geometry()
  -- maximize window
  love.window.setMode(0, 0)  -- maximize
  App.screen.width, App.screen.height, App.screen.flags = love.window.getMode()
  -- shrink slightly to account for window decoration
  App.screen.width = App.screen.width-100
  App.screen.height = App.screen.height-100

function initialize_window_geometry(geometry_spec)
  local geometry_initialized
  if geometry_spec then
    geometry_initialized = parse_geometry_spec(geometry_spec)
  end
  if not geometry_initialized then
    -- maximize window
    love.window.setMode(0, 0)  -- maximize
    App.screen.width, App.screen.height, App.screen.flags = love.window.getMode()
    -- shrink slightly to account for window decoration
    App.screen.width = App.screen.width-100
    App.screen.height = App.screen.height-100
  end

end
function parse_geometry_spec(geometry_spec)
  local width, height, x, y = geometry_spec:match('(%d+)x(%d+)%+(%d+)%+(%d+)')
  if width == nil then
    print('invalid geometry spec: '..geometry_spec)
    print('expected format: {width}x{height}+{x}+{y}')
    return false
  end
  App.screen.width = math.floor(tonumber(width))
  App.screen.height = math.floor(tonumber(height))
  App.screen.flags = {x=math.floor(tonumber(x)), y=math.floor(tonumber(y))}
  return true