code: def renderView(self):
      if self.img is None:
          ## make sure shm is large enough and get its address
          if self.width() == 0 or self.height() == 0:
              return
          dpr = self.devicePixelRatioF()
          iwidth = int(self.width() * dpr)
          iheight = int(self.height() * dpr)
          size = iwidth * iheight * 4
          if size > self.shm.size():
              try:
                  self.shm.resize(size)
              except SystemError:
                  # actually, the platforms on which resize() _does_ work
                  # can also take this codepath
                  self.shm.close()
                  fd = self.shmFile.fileno()
                  os.ftruncate(fd, size)
                  self.shm = mmap.mmap(
                      fd, size, access=mmap.ACCESS_WRITE
                  )
  
          ## render the scene directly to shared memory
  
          # see functions.py::ndarray_to_qimage() for rationale
          if QT_LIB.startswith("PyQt"):
              # PyQt5, PyQt6 >= 6.0.1
              img_ptr = int(Qt.sip.voidptr(self.shm))
          else:
              # PySide2, PySide6
              img_ptr = self.shm
  
          self.img = QtGui.QImage(
              img_ptr, iwidth, iheight, QtGui.QImage.Format.Format_RGB32
          )
          self.img.setDevicePixelRatio(dpr)
  
          self.img.fill(0xFFFFFFFF)
          p = QtGui.QPainter(self.img)
          self.render(p, self.viewRect(), self.rect())
          p.end()
          self.sceneRendered.emit((iwidth, iheight, self.shm.size()))
  
imports: from ..Qt import QT_LIB, QtCore, QtGui, QtWidgets
  import atexit
  import enum
  import mmap
  import os
  import sys
  import tempfile
  from ..None import Qt
  from ..None import CONFIG_OPTIONS
  from ..None import multiprocess
  from .GraphicsView import GraphicsView
label_desc: Use image node_id 6 for calling the Renderer obj's underlying member method code with example usage: obj.renderView() without return types