Function lvgl::widgets::img::decoder_set_open_cb

pub fn decoder_set_open_cb(
    decoder: *mut lv_img_decoder_t, 
    open_cb: lv_img_decoder_open_f_t
) -> MynewtResult<()>

Set a callback to open an image

• decoder: pointer to an image decoder
• open_cb: a function to open an image