docstr: Insert text into bytes buffers
docstr_tok: ["Insert","text","into","bytes","buffers"]
code: def _insert_text_buf(self, line, idx):
      """Insert text into bytes buffers"""
      self._bytes_012[idx] = 0
      self._bytes_345[idx] = 0
      # Crop text if necessary
      ord_chars = np.array([ord(c) - 32 for c in line[: self._n_cols]])
      ord_chars = np.clip(ord_chars, 0, len(__font_6x8__) - 1)
      if len(ord_chars) > 0:
          b = __font_6x8__[ord_chars]
          self._bytes_012[idx, : len(ord_chars)] = b[:, :3]
          self._bytes_345[idx, : len(ord_chars)] = b[:, 3:]
  
imports: import numpy
  from .widget import Widget
  from ...visuals import Visual
  from ...gloo import VertexBuffer
  from ...color import Color
label_desc: Use image node_id 14 for calling the ConsoleVisual obj's underlying member method code with example usage: obj._insert_text_buf(line, idx) without return types