def load(self, filename):
        """ Loads a profile from a given filename and returns the internal
        used index which can be assigned to a light."""

        # Make sure the user can load profiles directly from the ies profile folder
        data_path = join("/$$rp/data/ies_profiles/", filename)
        if isfile(data_path):
            filename = data_path

        # Make filename unique
        fname = Filename.from_os_specific(filename)
        if not VirtualFileSystem.get_global_ptr().resolve_filename(fname, get_model_path().get_value(), "ies"):
            self.error("Could not resolve", filename)
            return -1
        fname = fname.get_fullpath()

        # Check for cache entries
        if fname in self._entries:
            return self._entries.index(fname)

        # Check for out of bounds
        if len(self._entries) >= self._max_entries:
            # TODO: Could remove unused profiles here or regenerate texture
            self.warn("Cannot load IES Profile, too many loaded! (Maximum: 32)")

        # Try loading the dataset, and see what happes
        try:
            dataset = self._load_and_parse_file(fname)
        except InvalidIESProfileException as msg:
            self.warn("Failed to load profile from", filename, ":", msg)
            return -1

        if not dataset:
            return -1

        # Dataset was loaded successfully, now copy it
        dataset.generate_dataset_texture_into(self._storage_tex, len(self._entries))
        self._entries.append(fname)

        return len(self._entries) - 1
 Loads a profile from a given filename and returns the internal
        used index which can be assigned to a light.
metadrive/render_pipeline/rpcore/util/ies_profile_loader.py