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Encode Text to QR Image (utils.qr_encode)

Declaration​

img = utils.qr_encode(text[, {
    size = size,
    fill_color = fill_color,
    shadow_color = shadow_color,
}])

Parameters​

  • text
    String. Text to encode.
  • size
    Integer. Side length of the QR image. Default: 320.
  • fill_color
    Integer. Fill color. Default: 0xff000000 (black, opaque).
  • shadow_color
    Integer. Shadow color. Default: 0x00000000 (fully transparent).

Returns​

  • img
    Image object. The generated QR image with transparent background (0x00000000).

Examples​

  • Generate a 320px blue QR with transparent background and save to album
local img = utils.qr_encode("XXTouch is awesome", {
    size = 320,
    fill_color = 0xff409bff,
    shadow_color = 0xff308bef,
})
img:save_to_album()

Note: uses :save_to_album

  • If some apps cannot recognize QR with transparent/dark background, replace background to white via :replace_color:
local img = utils.qr_encode("XXTouch is awesome", {
    size = 320,
    fill_color = 0xff000000,
})
img:replace_color(0x00000000, 0xffffffff)
img:save_to_album()

Note: uses :replace_color, :save_to_album