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buntine / barcoders

A barcode encoding library for the Rust programming language
Apache License 2.0
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barcode-encoding-library barcodes rust symbologies

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Build Status Coverage Status MIT licensed Crates.io Algorithmia

BARCODERS

Barcoders is a barcode-encoding library for the Rust programming language.

Barcoders allows you to encode valid data for a chosen barcode symbology into a Vec<u8> representation of the underlying binary structure. From here, you can take advantage of one of the optional builtin generators (for exporting to SVG, GIF, PNG, etc) or build your own.

Installation

For encode-only functionality (e.g if you just want to translate a String into a Vec<u8> of binary digits):

[dependencies]
barcoders = "2.0.0"

If you want to generate barcodes into a particular format, turn on the appropriate feature(s):

[dependencies]
barcoders = {version = "2.0.0", features = ["image", "ascii", "svg", "json"]}

Each generator is an optional feature so you only need to compile what you want to use. See below for the feature associated to the generation functionality you desire.

Documentation

Documentation and examples are available here.

Current Support

The ultimate goal of Barcoders is to provide encoding support for all major (and many not-so-major) symbologies.

Symbologies

Generators

Examples

Encoding

extern crate barcoders;

use barcoders::sym::ean13::*;

// Each encoder accepts a String to be encoded. Valid data is barcode-specific
// and thus constructors return an Result<T, barcoders::error::Error>.
let barcode = EAN13::new("593456661897").unwrap();

// The `encode` method returns a Vec<u8> of the binary representation of the
// generated barcode. This is useful if you want to add your own generator.
let encoded: Vec<u8> = barcode.encode();

Image (GIF, WEBP, PNG) generation

extern crate barcoders;

use barcoders::sym::code39::*;
use barcoders::generators::image::*;
use std::io::prelude::*;
use std::io::BufWriter;
use std::fs::File;
use std::path::Path;

let barcode = Code39::new("1ISTHELONELIESTNUMBER").unwrap();
let png = Image::png(80); // You must specify the height in pixels.
let encoded = barcode.encode();

// Image generators return a Result<Vec<u8>, barcoders::error::Error) of encoded bytes.
let bytes = png.generate(&encoded[..]).unwrap();

// Which you can then save to disk.
let file = File::create(&Path::new("my_barcode.png")).unwrap();
let mut writer = BufWriter::new(file);
writer.write(&bytes[..]).unwrap();

// Generated file ↓ ↓ ↓

Code 39: 1ISTHELONELIESTNUMBER

You can also request an image::RgbaImage, which you can manipulate yourself:

let barcode = Code39::new("BEELZEBUB").unwrap();
let buffer = Image::image_buffer(100);
let encoded = barcode.encode();
let img = buffer.generate_buffer(&encoded[..]).unwrap();

// Manipulate and save the image here...

You may also specify the barcode x-dimension, rotation, background/foreground colors and opacity by specifying the struct fields:

let gif = Image::GIF{height: 80,
                     xdim: 1,
                     rotation: Rotation::Zero,
                     // Using non black/white colors is generally not recommended by most vendors, but barcoders makes it possible.
                     foreground: Color::new([255, 0, 0, 255]),
                     background: Color::new([0, 255, 20, 255])};

SVG generation

SVG is similar to the other image types, but I've supplied it as a separate feature as it doesn't require third-party dependencies.

extern crate barcoders;

use barcoders::sym::code39::*;
use barcoders::generators::svg::*;
use std::io::prelude::*;
use std::io::BufWriter;
use std::fs::File;
use std::path::Path;

let barcode = Code39::new("56DFU4A777H").unwrap();
let svg = SVG::new(200); // You must specify the height in pixels.
let encoded = barcode.encode();
let data: String = svg.generate(&encoded).unwrap();

let file = File::create(&Path::new("my_barcode.svg")).unwrap();
let mut writer = BufWriter::new(file);
writer.write(data.as_bytes()).unwrap();

You may also specify the barcode x-dimension, background/foreground colors and opacity by specifying the struct fields:

let svg = SVG{height: 80,
              xdim: 1,
              // Using non black/white colors is generally not recommended by most vendors, but barcoders makes it possible.
              foreground: Color::black(),
              background: Color::new([0, 255, 20, 255])};

ASCII generation

The ASCII generator is useful for testing purposes.

extern crate barcoders;

use barcoders::sym::ean13::*;
use barcoders::generators::ascii::*;

let barcode = EAN13::new("750103131130").unwrap();
let encoded = barcode.encode();

let ascii = ASCII::new();
ascii.generate(&encoded[..]);

assert_eq!(ascii.unwrap(),
"
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
# # ##   # #  ###  ##  # #  ### #### # ##  ## # # #    # ##  ## ##  ## #    # ###  # ### #  # #
".trim());

JSON generation

This may be useful for passing encoded data to third-party systems in a conventional format.

extern crate barcoders;

use barcoders::sym::codabar::*;
use barcoders::generators::json::*;

let codabar = Codabar::new("A98B").unwrap();
let json = JSON::new();
let generated = json.generate(&codabar.encode()[..]);

assert_eq!(generated.unwrap(),
"
{
 \"height\": 10,
 \"xdim\": 1,
 \"encoding\": [1,0,1,1,0,0,1,0,0,1,0,1,1,0,1,0,0,1,0,1,0,1,0,0,1,1,0,1,0,1,0,1,0,1,0,0,1,0,0,1,1]
}
"

Tests

Note, if you want to output actual image/svg files to the filesystem for visual confirmation, set the WRITE_TO_FILE variable in the appropriate test modules.

Full suite:

$ cargo test --features="image svg ascii json"

Encoding only:

$ cargo test

License

Licensed under either of

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.