Pure Elixir barcode encoding library.

Supports Code 128 (full ASCII). Returns bar patterns as lists of module widths suitable for any renderer (PDF, SVG, Canvas, etc.).

Standard encoding

{:ok, bars} = ExBarcode.encode("Hello-123")

Returns alternating bar/space module widths.

Shaped encoding (creative barcodes)

{:ok, result} = ExBarcode.encode_shaped("SPOT2NITE", shape: :rv)
result.bars          # positioned bars with individual heights
result.decorations   # solid shapes (wheels, windows, etc.)

Returns an ExBarcode.Shape.Result with normalized 0.0–1.0 coordinates. Any renderer scales to desired size.

Available shapes: :rv, :camper, :city, :wave, :diamond, :hill