@slideglance/core

Deterministic PPTX → SVG / PNG conversion as a WebAssembly module. Backed by the SlideGlance Rust crate ecosystem.

Part of the SlideGlance project — published to npm.

What it does

The full PPTX pipeline (parser + renderer + rasterizer) compiled to WebAssembly with three flavored builds for different bundler stories:

| Subpath | When to use | | --------------------- | ------------------------------------------------------------ | | @slideglance/core/bundler | Modern bundlers (Vite, Webpack 5+, esbuild). The wasm is imported as an asset and resolved at bundle time. | | @slideglance/core/web | Browsers without a bundler — call init() once to download and instantiate the wasm module. | | @slideglance/core/node | Node.js / Deno / Bun — sync wasm load via fs.readFile. |

Same PPTX bytes + same font buffers → bitwise-identical output. No system fonts, no system clock, no randomness in the rendering path.

Install

pnpm add @slideglance/core
# or
npm i @slideglance/core

Quick start (Node)

import { convertPptxToSvg } from "@slideglance/core/node";
import { readFileSync } from "node:fs";

const slides = convertPptxToSvg(readFileSync("deck.pptx"), [], []);
for (const s of slides) {
  console.log(`slide ${s.slide_number}: ${s.svg.length} bytes`);
}

Quick start (browser, bundler)

import { convertPptxToSvg } from "@slideglance/core/bundler";

const buf = await fetch("/deck.pptx").then((r) => r.arrayBuffer());
const slides = convertPptxToSvg(new Uint8Array(buf), [], []);

Quick start (browser, no bundler)

import init, { convertPptxToSvg } from "@slideglance/core/web";

await init();   // download + instantiate the wasm module
const slides = convertPptxToSvg(bytes, [], []);

API

| Function | Returns | | --------------------------------------------------------------------- | ---------------------------------- | | parsePptxData(bytes) | Presentation | | convertPptxToSvg(bytes, slides, fonts) | SlideSvg[] | | convertPptxToPng(bytes, slides, width?, height?, fonts) | SlideImage[] — fonts required. | | svgToPng(svg, width?, height?, fonts) | Uint8Array | | emuToPixels(emu) | number | | version() | string (wasm crate version) |

Pass fonts (Uint8Array[]) to enable path-mode glyph outlines — required for PNG conversion, optional for SVG (text-mode is the default).

Full type definitions ship with the package — your editor will pick them up automatically.

Status

Pre-release — APIs may change before 1.0.

License

MIT — see LICENSE.