NAME

       Image::ExifTool::WritePNG.pl - Write PNG meta information

SYNOPSIS

       These routines are autoloaded by Image::ExifTool::PNG.

DESCRIPTION

       This file contains routines to write PNG metadata.

NOTES

       Compress::Zlib is required to write compressed text.

       Existing text tags are always rewritten in their original form (compressed zTXt,
       uncompressed tEXt or international iTXt), so pre-existing compressed information can only
       be modified if Compress::Zlib is available.

       Newly created textual information is written in uncompressed tEXt form by default, or as
       compressed zTXt if the Compress option is used and Compress::Zlib is available (but only
       if the resulting compressed data is smaller than the original text, which isn't always the
       case for short text strings).

AUTHOR

       Copyright 2003-2018, Phil Harvey (phil at owl.phy.queensu.ca)

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.

SEE ALSO

       Image::ExifTool::PNG(3pm), Image::ExifTool(3pm)