https://github.com/jd557/qrgen

Scala port of https://github.com/nayuki/QR-Code-generator
https://github.com/jd557/qrgen

qrcode qrcode-generator scala scala-js scala-native

Last synced: 4 days ago
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Scala port of https://github.com/nayuki/QR-Code-generator

• Host: GitHub
• URL: https://github.com/jd557/qrgen
• Owner: JD557
• License: other
• Created: 2024-12-29T16:48:47.000Z (12 days ago)
• Default Branch: master
• Last Pushed: 2025-01-04T13:44:43.000Z (7 days ago)
• Last Synced: 2025-01-06T17:28:15.832Z (4 days ago)
• Topics: qrcode, qrcode-generator, scala, scala-js, scala-native
• Language: Scala
• Homepage:
• Size: 135 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# QRgen

An opinionated port of https://github.com/nayuki/QR-Code-generator to Scala.

Targets the JVM, JS and Native.

## Usage examples

Print QR Code to the standard output:

```scala

//> using scala 3.3.4

//> using dep eu.joaocosta::qrgen::0.1.0

import eu.joaocosta.qrgen.*

val qrCode = QrCode.encodeText("https://www.scala-lang.org/", Ecc.LOW)

qrCode.foreach { line =>

  println(line.map(x => if (x) "\u2588" else " ").mkString)

}

```

Store QR Code as a BMP:

```scala

//> using scala 3.3.4

//> using dep eu.joaocosta::qrgen::0.1.0

//> using dep eu.joaocosta::minart::0.6.2

import eu.joaocosta.minart.backend.defaults.given

import eu.joaocosta.minart.graphics.*

import eu.joaocosta.minart.graphics.image.Image

import eu.joaocosta.minart.runtime.Resource

import eu.joaocosta.qrgen.*

val qrCode = QrCode.encodeText("https://www.scala-lang.org/", Ecc.LOW)

val surface = RamSurface(

  qrCode.map(_.map(set => Color.grayscale(if (set) 0 else 255)))

)

Image.storeBmpImage(surface.view.scale(4), Resource("qrcode.bmp"))

```

## Differences from the Java version

The code here was heavily based on [nayuki/QR-Code-generator/java](https://github.com/nayuki/QR-Code-generator/tree/master/java),

with a few differences, some of which include:

- Splitting the code in smaller, self contained classes

- Favor immutability (there's still some internal mutability, though)

- Remove `QrSegmentAdvanced`

- Use `String` instead of `CharSequence`

- Make QR Codes extend `IndexedSeq[IndexedSeq[Boolean]]`

This can have some performance impact, so the original version might be faster.