# Copyright 2019 Akiomi Kamakura
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from PIL.Image import Image


def or_convert(im: Image, mode: str) -> Image:
    """Converts image to mode if necessary

    Arguments:
        im: An input image.
        mode: A string. The requested mode.

    Returns:
        The output image.
    """

    return im if im.mode == mode else im.convert(mode)
