Quirc-JpegLib WASM

Wasm Module (compiled using Emscripten) to decode qr code image based on quirc and jpeglib.

$3

The size of the raw WASM module is 250 KB, the gzipped version is 74 KB. The Javascript glue code size is 24 KB, the gzipped version is 7.4 KB.

$3

Install the package and peer dependencies using your favorite Node Js package manager.

yarn add quirc-wasm-emcc memory-fs fs-extra

Add the webpack plugin to your webpack configuration

const QuircWasmPclugin = require('quirc-wasm-emcc/dist/webpack-plugins');

webpackConfig = {
plugins: [
// other plugins
new QuircWasmPclugin(), // put this last
],
}

Import the function.

import {decodeQrCode} from "quirc-wasm-emcc";

Take the jpeg blob, read that blob as array buffer, and pass that array buffer to decodeQrCode function.

canvas.toBlob(blob => {
const reader = new FileReader();
reader.addEventListener("loadend", () => {
const arrayBuffer = reader.result;
const result = decodeQrCode(arrayBuffer);
console.log(result);
});
reader.readAsArrayBuffer(blob);
}, 'image/jpeg');import {decodeQrCode} from "quirc-wasm-emcc";