Portions of Pngcs may include work under the Apache License v2.0
requiring this NOTICE file to be provided.

# LICENSE

Copyright (c) 2025 Shuai Zhang <zhangshuai.ustc@gmail.com>

This project is distributed under the terms of the
GNU General Public License v3.0 or (at your option)
any later version ("GPL v3+").

See LICENSE.GPL.txt for the full text of the license.

Portions of this project are derived from works originally licensed under
the Apache License, Version 2.0, copyright by Hernán J. González.

As required by the Apache License, the original copyright notice is retained
below. See LICENSE.APACHE.txt for the full text of the Apache License,
Version 2.0.

Exception:

The library built from sources is licensed under the
GNU Lesser General Public License, version 3 or any later version
(LGPL-3.0-or-later), with an additional linking exception. See
LICENSE.LGPLv3-linking-exception.txt for details.

## Original Copyright Notice

Copyright 2012    Hernán J. González    hgonzalez@gmail.com

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.
