PNG reference library

There are multiple file formats even for a single type of file. This is because of the sources and libraries used to bundle required elements inside the file. As such, developing a program might require extra libraries to enable use of particular formats. This is the case with PNG reference library, which enables manipulation, reading, and writing of PNG files in custom programs.

Note that this isn’t an application which can function on its own, but rather a series of codes which needs to be implemented in the development code. The library currently supports C as the default programming language.

Building a program with the help of this library gives it features to manipulate, read, and write PNG files. It functions on both 32-bit and 64-bit architectures, relying on the zlib utility in order to perform conversion, which is lossless.

The library contains two structures, namely png_struct and png_info, each with its own role. The latter structure is used to collect and provide information on the PNG file of interest, while png_struct is the object used in the decoding process of a single image.

In the end, functions can be enabled to manipulate and process multiple PNG images at a time. It’s recommended that every file is made up of both the png_struct and png_info structures. It’s possible to have more than one png_info structure associated with a PNG file.