Barcode::ZBar::Processor(3pm)

Usage

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();

Overview

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 available 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()

force_format(input, output): force specific input and output formats for debug/testing.

set_config(symbology, config, value): Set config for indicated symbology (0 for all) to specified value. @returns 0 for success, non-0 for failure (config does not apply to specified symbology, or value out of range)

Copyright and license

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.

Releases

8 releases since Debian 6.0 (Squeeze); the text changed 7 times.