static bool
display_line (struct it *it, int cursor_vpos)
{
  struct glyph_row *row = it->glyph_row;
 
  /* Clear the result glyph row and enable it.  */
  prepare_desired_row (it->w, row, false);

  row->y = it->current_y;
  
  /* Loop generating characters.  The loop is left with IT on the next
     character to display.  */
  while (true)
    {
            
      /* Retrieve the next thing to display.  Value is false if end of
	 buffer reached.  */
      if (!get_next_display_element (it))
	{
	  break;
	}

      PRODUCE_GLYPHS (it);
      
    at_end_of_line:
      /* Is this a line end?  If yes, we're also done, after making
	 sure that a non-default face is extended up to the right
	 margin of the window.  */
      if (ITERATOR_AT_END_OF_LINE_P (it))
	{	  
	  /* Consume the line end.  This skips over invisible lines.  */
	  set_iterator_to_next (it, true);
	  break;
	}

      set_iterator_to_next (it, true);
    }

  /* Compute pixel dimensions of this line.  */
  compute_line_metrics (it);

  /* Prepare for the next line.  This line starts horizontally at (X
     HPOS) = (0 0).  Vertical positions are incremented.  As a
     convenience for the caller, IT->glyph_row is set to the next
     row to be used.  */
  it->current_y += row->height;
  ++it->glyph_row;
  return MATRIX_ROW_DISPLAYS_TEXT_P (row);
}