NAME

       Barcode::ZBar::Processor - self-contained bar code reader

SYNOPSIS

       setup:

           use Barcode::ZBar;

           my $reader = Barcode::ZBar::Processor->new();
           $reader->init("/dev/video1", 1);
           $reader->parse_config('code39.disable');
           $reader->set_data_handler(\&my_handler);

       scan an image:

           $reader->process_image($image);

       scan from video:

           $reader->set_visible();
           $reader->set_active();
           $reader->user_wait();

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.

       This interface is not well suited for integration with an existing GUI, as the library
       manages the optional preview window and any user interaction.  Use a
       Barcode::ZBar::ImageScanner or Investigate the avilable widget interfaces for GUI
       applications.

REFERENCE

   Methods
       new()
           Create a new bar code reader instance.

       init([video_device], [enable_display])
           Open a video input device and/or prepare to display output.

       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 closure as arguments.  Closure may be achieved
           either using standard Perl closure or by manually passing a scalar via closure.

       is_visible()
       set_visible([visible])
           Test/set visibility of the output window.

       set_active([active])
           Enable/disable video streaming and scanning for bar codes.

       get_results()
           Return a list of Barcode::ZBar::Symbol results from the last scanned image or video
           frame.

       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.

       process_one([timeout])
           Enable video and scan until at least one barcode is found.  Note that multiple results
           may still be returned.

       process_image([image])
           Scan a Barcode::ZBar::Image for bar codes.

       parse_config(configstr)
           Apply a decoder configuration setting.  See the documentation for "zbarcam"/"zbarimg"
           for available configuration options.

       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 "init()"

SEE ALSO

       Barcode::ZBar, Barcode::ZBar::Image, Barcode::ZBar::ImageScanner

       zbarimg(1), zbarcam(1)

       http://zbar.sf.net

AUTHOR

       Jeff Brown, <spadix@users.sourceforge.net>

COPYRIGHT AND LICENSE

       Copyright 2008-2009 (c) Jeff Brown <spadix@users.sourceforge.net>

       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.