barcode_pao

https://github.com/pao-xx/barcode-pao-ruby

Barcode.Ruby Native is a barcode generation library using C++ FFI, supporting 18 barcode types: Code39, Code93, Code128, GS1-128, NW-7, ITF, Matrix 2of5, NEC 2of5, JAN-8, JAN-13, UPC-A, UPC-E, GS1 DataBar (Standard/Limited/Expanded), QR Code, DataMatrix, PDF417, and Japan Post Customer Barcode. Output formats: PNG, JPEG, SVG.