local assdraw = require 'mp.assdraw'local utils = require 'mp.utils' local things = {}for i = 1, 2 do    things[i] = {        osd1 = mp.create_osd_overlay("ass-events"),        osd2 = mp.create_osd_overlay("ass-events")    }endthings[1].text = "{\\an5}hello\\Nworld"things[2].text = "{\\pos(400, 200)}something something" mp.add_periodic_timer(2, function()    for i, thing in ipairs(things) do        thing.osd1.data = thing.text        thing.osd1.compute_bounds = true        --thing.osd1.hidden = true        local res = thing.osd1:update()        print("res " .. i .. ": " .. utils.to_string(res))         thing.osd2.hidden = true        if res ~= nil and res.x0 ~= nil then            local draw = assdraw.ass_new()            draw:append("{\\alpha&H80}")            draw:draw_start()            draw:pos(0, 0)            draw:rect_cw(res.x0, res.y0, res.x1, res.y1)            draw:draw_stop()            thing.osd2.hidden = false            thing.osd2.data = draw.text        end        thing.osd2:update()    endend)