code: def __call__(self, orig, dest):
      if not self._proc:
          self._proc = subprocess.Popen(
              [
                  mpl._get_executable_info("gs").executable,
                  "-dNOSAFER",
                  "-dNOPAUSE",
                  "-dEPSCrop",
                  "-sDEVICE=png16m",
              ],
              # As far as I can see, ghostscript never outputs to stderr.
              stdin=subprocess.PIPE,
              stdout=subprocess.PIPE,
          )
          try:
              self._read_until(b"\nGS")
          except _ConverterError as e:
              raise OSError(
                  f"Failed to start Ghostscript:\n\n{e.args[0]}"
              ) from None
  
      def encode_and_escape(name):
          return (
              os.fsencode(name)
              .replace(b"\\", b"\\\\")
              .replace(b"(", rb"\(")
              .replace(b")", rb"\)")
          )
  
      self._proc.stdin.write(
          b"<< /OutputFile ("
          + encode_and_escape(dest)
          + b") >> setpagedevice ("
          + encode_and_escape(orig)
          + b") run flush\n"
      )
      self._proc.stdin.flush()
      # GS> if nothing left on the stack; GS<n> if n items left on the stack.
      err = self._read_until((b"GS<", b"GS>"))
      stack = self._read_until(b">") if err.endswith(b"GS<") else b""
      if stack or not os.path.exists(dest):
          stack_size = int(stack[:-1]) if stack else 0
          self._proc.stdin.write(b"pop\n" * stack_size)
          # Using the systemencoding should at least get the filenames right.
          raise ImageComparisonFailure(
              (err + stack).decode(
                  sys.getfilesystemencoding(), "replace"
              )
          )
  
imports: import atexit
  import functools
  import hashlib
  import logging
  import os
  from pathlib import Path
  import shutil
  import subprocess
  import sys
  from tempfile import TemporaryDirectory, TemporaryFile
  import weakref
  import numpy
  from PIL import Image
  import matplotlib
  from matplotlib import cbook
  from matplotlib.testing.exceptions import ImageComparisonFailure
label_desc: Use image node_id 1 for calling the _GSConverter obj's underlying member method code with example usage: obj.__call__(orig, dest) and returns: os