@mlightcad/emf-converter

Source fork of [email protected] (Apache-2.0, ChristopherVR/emf-converter) used by @mlightcad/data-model to rasterize OLE2FRAME WMF/EMF previews.

Upstream tag: v2.0.2 (460b4fc).

Fork changes (vs upstream 2.0.2)

1. EMR_EXTSELECTCLIPRGN (src/emf-gdi-draw-text-bitmap.ts) — clip rects use device/page space instead of the GDI world transform, so Excel OLE ExtTextOut glyphs are not clipped away.
2. EMR_EXTCREATEFONTINDIRECTW (src/emf-gdi-object-handlers.ts) — LOGFONTW.lfFaceName is read at byte offset 32 (not 28), matching the Windows structure so CJK face remapping works.

Install

pnpm add @mlightcad/emf-converter

API

Same public API as upstream 2.0.2:

import {
  convertEmfToDataUrl,
  convertWmfToDataUrl
} from '@mlightcad/emf-converter'

const pngDataUrl = await convertEmfToDataUrl(arrayBuffer, {
  maxWidth: 4096,
  maxHeight: 4096,
  dpiScale: 1,
  fontFamilyMap: { simsun: '"Microsoft YaHei", sans-serif' }
})

@mlightcad/data-model statically imports this package and inlines it into its published CJS bundle.

Develop

pnpm --filter @mlightcad/emf-converter build
pnpm --filter @mlightcad/emf-converter test

License

Apache-2.0 — see LICENSE and NOTICE.md.