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.\"
.IX Title "Image::ExifTool::WritePNG 3pm"
.TH Image::ExifTool::WritePNG 3pm "2011-01-03" "perl v5.12.4" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Image::ExifTool::WritePNG.pl \- Write PNG meta information
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
These routines are autoloaded by Image::ExifTool::PNG.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This file contains routines to write \s-1PNG\s0 metadata.
.SH "NOTES"
.IX Header "NOTES"
Compress::Zlib is required to write compressed text.
.PP
Existing text tags are always rewritten in their original form (compressed
zTXt, uncompressed tEXt or internation iTXt), so pre-existing compressed
information can only be modified if Compress::Zlib is available.
.PP
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).
.SH "AUTHOR"
.IX Header "AUTHOR"
Copyright 2003\-2011, Phil Harvey (phil at owl.phy.queensu.ca)
.PP
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIImage::ExifTool::PNG\fR\|(3pm),
\&\fIImage::ExifTool\fR\|(3pm)