@shumoku/renderer-png · Shumoku Docs

PNG renderer for Shumoku. Rasterizes canonical static SVG output from @shumoku/renderer with @resvg/resvg-js. Legacy graph/prepared entry points remain compatible with @shumoku/renderer-svg while consumers migrate.

Node.js only — depends on the native @resvg/resvg-js binding, so it does not run in the browser.

Install

npm install @shumoku/renderer-png @shumoku/core

Quick start

import { writeFileSync } from 'node:fs'
import { YamlParser } from '@shumoku/core'
import { renderGraphToPng } from '@shumoku/renderer-png'

const { graph } = new YamlParser().parse(yaml)

const png = await renderGraphToPng(graph, { scale: 2 }) // → Buffer
writeFileSync('diagram.png', png)

API

Function	Description
`renderGraphToPng(graph, options?)`	`async` → `Buffer`. Canonical graph path: computes `ResolvedLayout` and renders the shared static SVG
`renderPng(prepared, options?)`	`async` → `Buffer`. Deprecated compatibility API for an existing legacy `PreparedRender`
`png.renderResolved(layout, options?)`	`async` → `Buffer`. Canonical path for an existing `ResolvedLayout`; supports `theme` and `scale`

PNGRenderOptions supports scale (default 2), theme, loadSystemFonts, and iconTimeout. If theme is omitted, renderGraphToPng honors graph.settings.theme and otherwise uses the light theme. External CDN icons are automatically embedded as base64 before rasterizing.

License

AGPL-3.0-only. For commercial licensing, contact [email protected].