enumeratio

@enumeratio/raster ​

Rasterize a themeable SVG string to PNG — Wolfram's Rasterize, for Node. No DOM: it renders statically via resvg, so it works in a CLI or a server the same as it would in a browser.

Usage ​

ts
import { rasterize, rasterizeToDataUri } from "@enumeratio/raster";

const png = rasterize(svg, { width: 400 }); // Uint8Array, PNG magic bytes 0x89 0x50 0x4E 0x47
const uri = rasterizeToDataUri(svg, { scale: 2 }); // "data:image/png;base64,…"

resvg doesn't resolve CSS custom properties, so flattenCss runs first and collapses the themeable var(--x, fallback) / currentColor the renderers in frontend emit down to concrete colours — innermost fallback first, then whatever's left (a var() with no fallback, or currentColor) to a single substitute colour (FlattenOptions.color, default a dark grey).

Where it's used ​

@enumeratio/cli writes plots to the terminal (iTerm2/kitty inline images) through this; formats's ./node entry installs it as the format registry's PNG rasterizer via setRasterizer, so Export(plot, "PNG") and the Image/Rasterize heads have a real backend in Node.