code: def _insert_text_buf(self, line, idx):
          
          self._bytes_012[idx] = 0
          self._bytes_345[idx] = 0
          # Crop text if necessary
          I = np.array([ord(c) - 32 for c in line[:self._n_cols]])
          I = np.clip(I, 0, len(__font_6x8__)-1)
          if len(I) > 0:
              b = __font_6x8__[I]
              self._bytes_012[idx, :len(I)] = b[:, :3]
              self._bytes_345[idx, :len(I)] = b[:, 3:]
docs: Insert text into bytes buffers