PDF417 Barcode generator

A no-std PDF417 encoder for embedded applications.

A faster implementation of the BlurHash algorithm used to generate better looking placeholder for websites and mobile apps. This crates encode and decode functions minimizes the number of allocated vectors to reduce the memory footprint. The base83 encode and decode are also both very fast!

Usage

Installation

pdf417 is available on crates.io

Use the cargo add command: shell cargo add pdf417

or add the crate in your Cargo.toml: toml [dependencies] pdf417 = "0"

Generating a PDF417

Before you can generate a PDF417 barcode you should consider:

1. The capacity of the barcode (maximum number of codewords).
2. The level of error correction (0-8)
3. The dimensions of the barcode (number of rows and columns)

Here is an no-std and no alloc example to generate a PDF417 barcode:

```rust use pdf417::*;

const COLS: u8 = 3; const ROWS: u8 = 5; const ECCLEVEL: u8 = 1; const WIDTH: usize = pdf417width!(COLS); const HEIGHT: usize = pdf417_height!(ROWS);

// High-level encoding let mut input = [0u16; (ROWS * COLS) as usize]; PDF417Encoder::new(&mut input) .appendascii("Hello, world!").seal(ECCLEVEL);

// Rendering let mut storage = [false; WIDTH * HEIGHT]; PDF417::new(&input, ROWS, COLS, ECC_LEVEL).render(&mut storage[..]); ```

If you need a bigger barcode, you can control the size of the modules (see the documentation) using the pdf417width and pdf417height macros.

Data Segments

You can multiple data segments (aka encoding modes) on a single barcode. The available types are: - numeric: efficient encoding of 44+ digit numbers - ascii: efficient encoding of text (alphanumeric + punctuation) with support for non-displyable ASCII values which are encoded as raw bytes. - bytes: binary data as bytes

An additional UTF-8 mode is available which allows encoding of UTF-8 strings using an ECI identifier and byte encoding mode (note that this encoding takes significantly more space than the ASCII mode).

See the different methods available on PDF417Encoder struct.

Documentation

More documentation is available at docs.rs.

Contribution & Feedback

If you have any feedback, please open an issue. If you encounter any bugs or unwanted behaviour, please open an issue.

This projet is open to contributions, feel free to submit your pull requests!

License

pdf417 is available under the MIT license. See the LICENSE file for more info.