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.\" ========================================================================
.\"
.IX Title "ZBar 3pm"
.TH ZBar 3pm 2024-03-25 "perl v5.38.2" "User Contributed Perl Documentation"
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.\" way too many mistakes in technical documents.
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.nh
.SH NAME
Barcode::ZBar \- Perl interface to the ZBar Barcode Reader
.SH SYNOPSIS
.IX Header "SYNOPSIS"
setup:
.PP
.Vb 1
\&    use Barcode::ZBar;
\&    
\&    my $reader = Barcode::ZBar::Processor\->new();
\&    $reader\->init();
\&    $reader\->set_data_handler(\e&my_handler);
.Ve
.PP
scan an image:
.PP
.Vb 5
\&    my $image = Barcode::ZBar::Image\->new();
\&    $image\->set_format(\*(Aq422P\*(Aq);
\&    $image\->set_size(114, 80);
\&    $image\->set_data($raw_bits);
\&    $reader\->process_image($image);
.Ve
.PP
scan from video:
.PP
.Vb 3
\&    $reader\->set_visible();
\&    $reader\->set_active();
\&    $reader\->user_wait();
.Ve
.PP
collect results:
.PP
.Vb 4
\&    my @symbols = $image\->get_symbols();
\&    foreach my $sym (@symbols) {
\&        print("decoded: " . $sym\->get_type() . ":" . $sym\->get_data());
\&    }
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
The ZBar Bar Code Reader is a library for scanning and decoding bar
codes from various sources such as video streams, image files or raw
intensity sensors.  It supports EAN\-13/UPC\-A, UPC-E, EAN\-8, Code 128,
Code 93, Code 39, Codabar, Interleaved 2 of 5 and QR Code.
.PP
These are the bindings for interacting directly with the library from
Perl.
.SH REFERENCE
.IX Header "REFERENCE"
.SS Functions
.IX Subsection "Functions"
.IP \fBversion()\fR 4
.IX Item "version()"
Returns the version of the zbar library as "\fImajor\fR.\fIminor\fR".
.IP \fBincrease_verbosity()\fR 4
.IX Item "increase_verbosity()"
Increases global library debug by one level.
.IP set_verbosity(\fIlevel\fR) 4
.IX Item "set_verbosity(level)"
Sets global library debug to the indicated level.  Higher numbers give
more verbosity.
.IP parse_config(\fIconfigstr\fR) 4
.IX Item "parse_config(configstr)"
Parse a decoder configuration setting into a list containing the
symbology constant, config constant, and value to set.  See the
documentation for \f(CW\*(C`zbarcam\*(C'\fR/\f(CW\*(C`zbarimg\*(C'\fR for available configuration
options.
.SS Constants
.IX Subsection "Constants"
Width stream "color" constants:
.IP SPACE 4
.IX Item "SPACE"
Light area or space between bars.
.IP BAR 4
.IX Item "BAR"
Dark area or colored bar segment.
.PP
Decoder configuration constants:
.IP Config::ENABLE 4
.IX Item "Config::ENABLE"
.PD 0
.IP Config::ADD_CHECK 4
.IX Item "Config::ADD_CHECK"
.IP Config::EMIT_CHECK 4
.IX Item "Config::EMIT_CHECK"
.IP Config::ASCII 4
.IX Item "Config::ASCII"
.IP Config::MIN_LEN 4
.IX Item "Config::MIN_LEN"
.IP Config::MAX_LEN 4
.IX Item "Config::MAX_LEN"
.IP Config::POSITION 4
.IX Item "Config::POSITION"
.IP Config::X_DENSITY 4
.IX Item "Config::X_DENSITY"
.IP Config::Y_DENSITY 4
.IX Item "Config::Y_DENSITY"
.PD
.PP
Symbology modifier constants:
.IP Modifier::GS1 4
.IX Item "Modifier::GS1"
.PD 0
.IP Modifier::AIM 4
.IX Item "Modifier::AIM"
.PD
.PP
Symbol orientation constants:
.IP Orient::UNKNOWN 4
.IX Item "Orient::UNKNOWN"
.PD 0
.IP Orient::UP 4
.IX Item "Orient::UP"
.IP Orient::RIGHT 4
.IX Item "Orient::RIGHT"
.IP Orient::DOWN 4
.IX Item "Orient::DOWN"
.IP Orient::LEFT 4
.IX Item "Orient::LEFT"
.PD
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Barcode::ZBar::Processor, Barcode::ZBar::ImageScanner,
Barcode::ZBar::Image, Barcode::ZBar::Symbol,
Barcode::ZBar::Scanner, Barcode::ZBar::Decoder
.PP
\&\fBzbarimg\fR\|(1), \fBzbarcam\fR\|(1)
.PP
http://zbar.sf.net
.SH AUTHOR
.IX Header "AUTHOR"
Jeff Brown, <spadix@users.sourceforge.net>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
Copyright 2008\-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
.PP
The ZBar Bar Code Reader is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.