react-native-vision-camera-zxing/README.md

A powerful, high-performance React Native Camera library.

# 说明

这个库是直接对 react-native-vision-camera 进行的二次开发，主要是为了鸿蒙手机没有安装 Google mlkit 库，导致扫码功能无法使用。

原本可以使用 Frame Processors 来实现。
但这个Frame Processors 的 'worklet' 功能经常导致Android 编译失败。
所以放权了使用 Frame Processors ，直接对源码进行了修改，使其自动识别(根据设备是否有安装Google服务)是用 mlkit 还是使用 zxing 库。

错误信息：
https://github.com/mrousavy/react-native-vision-camera/issues/3425#issuecomment-2765880379


Frame Processors功能的zxing库：vision-camera-zxing (https://github.com/xulihang/vision-camera-zxing)

此仓库的代码 react-native-vision-camera + vision-camera-zxing 的整合版。


下面是原始的MD文件内容
<br>


<a href="https://margelo.com">
  <picture>
    <source media="(prefers-color-scheme: dark)" srcset="./docs/static/img/banner-dark.png" />
    <source media="(prefers-color-scheme: light)" srcset="./docs/static/img/banner-light.png" />
    <img alt="VisionCamera" src="./docs/static/img/banner-light.png" />
  </picture>
</a>

<br />

<div>
  <img align="right" width="35%" src="docs/static/img/example.png">
</div>

### Features

VisionCamera is a powerful, high-performance Camera library for React Native. It features:

* 📸 Photo and Video capture
* 👁️ QR/Barcode scanner
* 📱 Customizable devices and multi-cameras ("fish-eye" zoom)
* 🎞️ Customizable resolutions and aspect-ratios (4k/8k images)
* ⏱️ Customizable FPS (30..240 FPS)
* 🧩 [Frame Processors](https://react-native-vision-camera.com/docs/guides/frame-processors) (JS worklets to run facial recognition, AI object detection, realtime video chats, ...)
* 🎨 Drawing shapes, text, filters or shaders onto the Camera
* 🔍 Smooth zooming (Reanimated)
* ⏯️ Fast pause and resume
* 🌓 HDR & Night modes
* ⚡ Custom C++/GPU accelerated video pipeline (OpenGL)

Install VisionCamera from npm:

```sh
npm i react-native-vision-camera
cd ios && pod install
```

..and get started by [setting up permissions](https://react-native-vision-camera.com/docs/guides)!

### Documentation

* [Guides](https://react-native-vision-camera.com/docs/guides)
* [API](https://react-native-vision-camera.com/docs/api)
* [Example](./example/)
* [Frame Processor Plugins](https://react-native-vision-camera.com/docs/guides/frame-processor-plugins-community)

### ShadowLens

To see VisionCamera in action, check out [ShadowLens](https://mrousavy.com/projects/shadowlens)!

<div>
  <a href="https://apps.apple.com/app/shadowlens/id6471849004">
    <img height="40" src="docs/static/img/appstore.svg" />
  </a>
  <a href="https://play.google.com/store/apps/details?id=com.mrousavy.shadowlens">
    <img height="40" src="docs/static/img/googleplay.svg" />
  </a>
</div>

### Example

```tsx
function App() {
  const device = useCameraDevice('back')

  if (device == null) return <NoCameraErrorView />
  return (
    <Camera
      style={StyleSheet.absoluteFill}
      device={device}
      isActive={true}
    />
  )
}
```

> See the [example](./example/) app

### Adopting at scale

<a href="https://github.com/sponsors/mrousavy">
  <img align="right" width="160" alt="This library helped you? Consider sponsoring!" src=".github/funding-octocat.svg">
</a>

VisionCamera is provided _as is_, I work on it in my free time.

If you're integrating VisionCamera in a production app, consider [funding this project](https://github.com/sponsors/mrousavy) and <a href="mailto:me@mrousavy.com?subject=Adopting VisionCamera at scale">contact me</a> to receive premium enterprise support, help with issues, prioritize bugfixes, request features, help at integrating VisionCamera and/or Frame Processors, and more.

### Socials

* 🐦 [**Follow me on Twitter**](https://twitter.com/mrousavy) for updates
* 📝 [**Check out my blog**](https://mrousavy.com/blog) for examples and experiments
* 💬 [**Join the Margelo Community Discord**](https://margelo.com/discord) for chatting about VisionCamera
* 💖 [**Sponsor me on GitHub**](https://github.com/sponsors/mrousavy) to support my work
* 🍪 [**Buy me a Ko-Fi**](https://ko-fi.com/mrousavy) to support my work