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.\" ========================================================================
.\"
.IX Title "ZBar::Processor 3pm"
.TH ZBar::Processor 3pm "2009-10-23" "perl v5.20.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Barcode::ZBar::Processor \- self\-contained bar code reader
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
setup:
.PP
.Vb 1
\&    use Barcode::ZBar;
\&    
\&    my $reader = Barcode::ZBar::Processor\->new();
\&    $reader\->init("/dev/video1", 1);
\&    $reader\->parse_config(\*(Aqcode39.disable\*(Aq);
\&    $reader\->set_data_handler(\e&my_handler);
.Ve
.PP
scan an image:
.PP
.Vb 1
\&    $reader\->process_image($image);
.Ve
.PP
scan from video:
.PP
.Vb 3
\&    $reader\->set_visible();
\&    $reader\->set_active();
\&    $reader\->user_wait();
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
A Barcode::ZBar::Processor may be used to quickly create stand-alone
bar code scanning applications.  It has interfaces to scan images or
video and to optionally display a video/image preview to a window.
.PP
This interface is not well suited for integration with an existing
\&\s-1GUI,\s0 as the library manages the optional preview window and any user
interaction.  Use a Barcode::ZBar::ImageScanner or Investigate the
avilable widget interfaces for \s-1GUI\s0 applications.
.SH "REFERENCE"
.IX Header "REFERENCE"
.SS "Methods"
.IX Subsection "Methods"
.IP "\fInew()\fR" 4
.IX Item "new()"
Create a new bar code reader instance.
.IP "init([\fIvideo_device\fR], [\fIenable_display\fR])" 4
.IX Item "init([video_device], [enable_display])"
Open a video input device and/or prepare to display output.
.IP "set_data_handler([\fIhandler\fR], [\fIclosure\fR])" 4
.IX Item "set_data_handler([handler], [closure])"
Setup a callback to process results whenever new results are available
from the video stream or a static image.  The specified callable will
be invoked with the associated Barcode::ZBar::Processor object and
\&\fIclosure\fR as arguments.  Closure may be achieved either using
standard Perl closure or by manually passing a scalar via \fIclosure\fR.
.IP "\fIis_visible()\fR" 4
.IX Item "is_visible()"
.PD 0
.IP "set_visible([\fIvisible\fR])" 4
.IX Item "set_visible([visible])"
.PD
Test/set visibility of the output window.
.IP "set_active([\fIactive\fR])" 4
.IX Item "set_active([active])"
Enable/disable video streaming and scanning for bar codes.
.IP "\fIget_results()\fR" 4
.IX Item "get_results()"
Return a list of Barcode::ZBar::Symbol results from the last scanned
image or video frame.
.IP "user_wait([\fItimeout\fR])" 4
.IX Item "user_wait([timeout])"
Wait for the user to press a key/button or close the window.  Bar
codes will continue to be processed if video is active.
.IP "process_one([\fItimeout\fR])" 4
.IX Item "process_one([timeout])"
Enable video and scan until at least one barcode is found.  Note that
multiple results may still be returned.
.IP "process_image([\fIimage\fR])" 4
.IX Item "process_image([image])"
Scan a Barcode::ZBar::Image for bar codes.
.IP "parse_config(\fIconfigstr\fR)" 4
.IX Item "parse_config(configstr)"
Apply a decoder configuration setting.  See the documentation for
\&\f(CW\*(C`zbarcam\*(C'\fR/\f(CW\*(C`zbarimg\*(C'\fR for available configuration options.
.IP "request_size(\fIwidth\fR, \fIheight\fR)" 4
.IX Item "request_size(width, height)"
Request a preferred size for the video image from the device.  The
request may be adjusted or completely ignored by the driver.  Must be
called before \f(CW\*(C`init()\*(C'\fR
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Barcode::ZBar, Barcode::ZBar::Image, Barcode::ZBar::ImageScanner
.PP
\&\fIzbarimg\fR\|(1), \fIzbarcam\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\-2009 (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 \s-1GNU\s0 Lesser Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.