vision-camera-barcode-scanner

Features

High performance barcode scanner for React Native using VisionCamera.

• Modern and future-proof: Built on react-native-vision-camera with minimal native dependencies for each platforms to minimize future build-failure risk.

• Minimal footprint: Leverages Google's MLKit BarcodeScanner on Android and Apple's Vision VNDetectBarcodesRequest.

• Powerful & Performant: The implementation has been tailored for advanced use cases where performance is critical. Scanning barcodes is butter smooth at 30fps, and you can customize the detection speed loop (detection fps).

• Hooks based: Exposes easy-to-use hooks useBarcodeScanner to quickly get started

Demo

A working project can be found at vision-camera-barcode-scanner-example

Install

[!WARNING] The project is currently trying to closely track the react-native-vision-camera v4, The latest 0.11+ releases are made to work with the latest react-native-vision-camera release only (currently 4.0.0)

npm install @mgcrea/vision-camera-barcode-scanner
# or
yarn add @mgcrea/vision-camera-barcode-scanner
# or
pnpm add @mgcrea/vision-camera-barcode-scanner

Dependencies

This package relies on:

• react-native-vision-camera@>=3
• react-native-worklets-core

You must add them as dependencies to your project:

npm install react-native-vision-camera react-native-worklets-core
# or
yarn add react-native-vision-camera react-native-worklets-core
# or
pnpm add react-native-vision-camera react-native-worklets-core

Then you must follow their respective installation instructions:

• react-native-worklets-core

Quickstart

import {
  CameraHighlights,
  useBarcodeScanner,
} from "@mgcrea/vision-camera-barcode-scanner";
import type { FunctionComponent } from "react";
import { StyleSheet } from "react-native";

export const App: FunctionComponent = () => {
  // @NOTE you must properly ask for camera permissions first!
  // You should use `PermissionsAndroid` for Android and `Camera.requestCameraPermission()` on iOS.

  const { props: cameraProps, highlights } = useBarcodeScanner({
    fps: 5,
    barcodeTypes: ["qr", "ean-13"], // optional
    onBarcodeScanned: (barcodes) => {
      "worklet";
      console.log(
        `Scanned ${barcodes.length} codes with values=${JSON.stringify(
          barcodes.map(({ value }) => value),
        )} !`,
      );
    },
  });

  const devices = useCameraDevices();
  const device = devices.find(({ position }) => position === "back");
  const format = useCameraFormat(device, [
    { videoResolution: { width: 1920, height: 1080 } },
  ]);
  if (!device) {
    return null;
  }

  return (
    <View style={{ flex: 1 }}>
      <Camera
        style={StyleSheet.absoluteFill}
        device={device}
        isActive
        {...cameraProps}
      />
      <CameraHighlights highlights={highlights} color="peachpuff" />
    </View>
  );
};

Credits

Inspired by:

• rodgomesc/vision-camera-code-scanner

Authors

• Olivier Louvignes <[email protected]>

License

The MIT License

Copyright (c) 2023 Olivier Louvignes <[email protected]>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.