libpng - Portable Network Graphics (PNG) Reference Library 1.6.39 (private
functions)
#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As of libpng version 1.5.1, this section is no longer
maintained, now that the private function prototypes are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.
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.
png(5),
libpng(3),
zlib(3),
deflate(5),
and
zlib(5)
Cosmin Truta, Glenn Randers-Pehrson