void draw(const uint32_t base_pattern,
	  const start_size_t& text)
{
  static constexpr screen_cell_t top_left     = { 0, 12};
  static constexpr screen_cell_t bottom_right = {19, 17};

  draw_box_border(base_pattern, top_left, bottom_right);
  draw_box_background(base_pattern, top_left, bottom_right);

  uint32_t ix = 0;
  int32_t x = top_left.x + 1;
  int32_t y = top_left.y + 2;
  // ignore C-string null terminator
  while (ix < (text.size - 1)) {
    const uint8_t c = text.start[ix];
    switch (c) {
    case control_t::text: break;
    case control_t::done: break;
    case control_t::prompt: break;
    case control_t::page: break;

    case control_t::next: [[fallthrough]];
    case control_t::line:
      while (x < bottom_right.x) {
	put_char(base_pattern, x, y, ascii_to_font(' '));
	x++;
      }
      x = top_left.x + 1;
      y += 2;
      break;
    case control_t::para: [[fallthrough]];
    case control_t::cont:
      // fixme:
      ix = text.size;
      break;
    default:
      put_char(base_pattern, x, y, ascii_to_font(c));
      x += 1;
      break;
    }
    ix++;
  }
}