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Image::ExifTool::WritePNG(3) User Contributed Perl Documentation Image::ExifTool::WritePNG(3)

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

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

This file contains routines to write PNG metadata.

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).

Copyright 2003-2021, Phil Harvey (philharvey66 at gmail.com)

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

Image::ExifTool::PNG(3pm), Image::ExifTool(3pm)
2020-12-26 perl v5.32.1

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