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)