code: def rgb(self):
          # type: () -> bytes
          
  
          if not self.__rgb:
              rgb = bytearray(self.height * self.width * 3)
              raw = self.raw
              rgb[0::3] = raw[2::4]
              rgb[1::3] = raw[1::4]
              rgb[2::3] = raw[0::4]
              self.__rgb = bytes(rgb)
  
          return self.__rgb
docs: Compute RGB values from the BGRA raw pixels.
  
          :return bytes: RGB pixels.