infobeamer-testcard/node.lua

util.init_hosted()

local json = require "json"

local serial = sys.get_env "SERIAL"
local location = ""
local description = "<please wait>"

util.data_mapper{
    ["device_info"] = function(info)
        info = json.decode(info)
        location = info.location
        description = info.description
    end
}

gl.setup(NATIVE_WIDTH, NATIVE_HEIGHT)

card = resource.load_image("testcard.png")
font = resource.load_font("vera.ttf")

function node.render()
    gl.clear(0,0,0,1)

    card:draw(0, 0, 1920, 1080)

    -- upper: 623
    -- lower: 707

    upper_text = "C3VOC: " .. description

    if location == nil or location == '' then
        lower_text = "Serial " .. serial
    else
        lower_text = location .. " - Serial " .. serial
    end

    upper_width = font:width(upper_text, 40)
    font:write(960-(upper_width/2), 631, upper_text, 40, 1,1,1,1)

    lower_width = font:width(lower_text, 20)
    font:write(960-(lower_width/2), 679, lower_text, 20, 1,1,1,1)
end