---
name: "libpngpf"
section: "3"
platform: "macos"
package: "python_modules"
version: "92"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/libpngpf"
---

# libpngpf(3)

Portable Network Graphics (PNG) Reference Library 1.6.36 (private functions)

## NAME

libpng - Portable Network Graphics (PNG) Reference Library 1.6.36 (private functions)

## SYNOPSIS

**#include** *"pngpriv.h"*

**As of libpng version** *1.5.1***, this section is no longer** *maintained***, now that the private function prototypes are hidden in** *pngpriv.h* **and not accessible to applications. Look in** *pngpriv.h* **for the prototypes and a short description of each** **function.**

## DESCRIPTION

**The functions previously listed here are used privately by libpng and are not** **available for use by applications.  They are not "exported" to applications** **using shared libraries.**

## SEE ALSO

[**png**(5)](/png/5.md), **libpng**(3), **zlib**(3), **deflate**(5), and **zlib**(5)

## AUTHORS

**Cosmin Truta, Glenn Randers-Pehrson**