#237 libpng warning: Interlace handling should be turned on when using png_read_image

[Valerio Paoletti]

I've this error in log on Centos 7:

libpng warning: Interlace handling should be turned on when using png_read_image

This is package info:

Installed Packages
Name : libpng
Arch : x86_64
Epoch : 2
Version : 1.5.13
Release : 5.el7
Size : 602 k
Repo : installed
From repo : base
Summary : A library of functions for manipulating PNG image format files
URL : http://www.libpng.org/pub/png/
License : zlib
Description : The libpng package contains a library of functions for creating and
: manipulating PNG (Portable Network Graphics) image format files. PNG
: is a bit-mapped graphics format similar to the GIF format. PNG was
: created to replace the GIF format, since GIF uses a patented data
: compression algorithm.
:
: Libpng should be installed if you need to manipulate PNG format image
: files.

Available Packages
Name : libpng
Arch : i686
Epoch : 2
Version : 1.5.13
Release : 5.el7
Size : 215 k
Repo : base/7/x86_64
Summary : A library of functions for manipulating PNG image format files
URL : http://www.libpng.org/pub/png/
License : zlib
Description : The libpng package contains a library of functions for creating and
: manipulating PNG (Portable Network Graphics) image format files. PNG
: is a bit-mapped graphics format similar to the GIF format. PNG was
: created to replace the GIF format, since GIF uses a patented data
: compression algorithm.
:
: Libpng should be installed if you need to manipulate PNG format image
: files.

[Glenn Randers-Pehrson]

The error is in the application that called libpng's png_read_image().