Crate benday_core 

benday-core: terminal charts from a Vega-Lite-style JSON spec.

Pure spec-in, string-out — no I/O, no TTY detection, no environment sniffing — so it can sit under a CLI, an MCP server, or another Rust program unchanged.

Re-exports

pub use error::Error;

Modules

compile

The compiler: resolve a spec against its data into a Scene — every data- and layout-dependent decision made, geometry normalized to the plot rect. All colors are resolved here; the rasterizer never sees a Theme.

error

ingest

Data ingestion: resolve the spec’s inline data and/or a piped data document into a normalized Table. Pure — the CLI does the I/O.

scene

The Scene: benday’s intermediate representation. compile() resolves a spec against its data into a Scene — every data- and layout-dependent decision made, geometry normalized to the plot rect — and rasterize() turns a Scene into glyphs. The serialized form is the golden-corpus snapshot and the --dump-scene output; it is explicitly unstable.

spec

The chart specification: a strict subset of Vega-Lite’s JSON grammar.

theme

Color themes, named after print processes. Gradients and palettes are generated in OKLCH so ramps are perceptually uniform (no brightness wobble mid-gradient like naive HSV interpolation).

Structs

RenderOptions

Rendered

Rgb

Enums

BarStyle

How bar marks are filled. Dots (the house style) rasterize bars through the pixel canvas at 4 vertical levels per cell; blocks give a solid silhouette with finer 8-levels-per-cell caps.

Marker

Functions

render