[QUESTION]If I want to save a BMP file as a PNG, what should I do?

[//]: # "SPDX-FileCopyrightText: Copyright (c) 2022-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved." [//]: # "SPDX-License-Identifier: Apache-2.0" [//]: # "" [//]: # "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." **What is your question?** If I want to save a BMP file as a PNG, what should I do? Could you write an example of encoding and decoding a png file?