Method decode

src/PIL/ImageFile.py:839–849

Override to perform the decoding process. :param buffer: A bytes object with the data to be decoded. :returns: A tuple of ``(bytes consumed, errcode)``. If finished with decoding return -1 for the bytes consumed. Err codes are from :data:`.ImageFile.

(self, buffer: Image.DecoderInput)

        return self._pulls_fd

    def decode(self, buffer: Image.DecoderInput) -> tuple[int, int]:
        """
        Override to perform the decoding process.

        :param buffer: A bytes object with the data to be decoded.
        :returns: A tuple of ``(bytes consumed, errcode)``.
            If finished with decoding return -1 for the bytes consumed.
            Err codes are from :data:`.ImageFile.ERRORS`.
        """
        msg = "unavailable in base decoder"
        raise NotImplementedError(msg)

    def set_as_raw(
        self,