a golang qrcode writer

A QR Code is a matrix (two-dimensional) barcode. Arbitrary content may be encoded.

A QR Code contains error recovery information to aid reading damaged or obscured codes. There are four levels of error recovery: qrcode.{Low, Medium, High, Highest}. QR Codes with a higher recovery level are more robust to damage, at the cost of being physically larger.

The maximum capacity of a QR Code varies according to the content encoded and the error recovery level. The maximum capacity is 2,953 bytes, 4,296 alphanumeric characters, 7,089 numeric digits, or a combination of these.

This package implements a subset of QR Code 2005, as defined in ISO/IEC 18004:2006.

package main

import (
	"github.com/bronze1man/kmgQrcode"
	"io/ioutil"
)

func main(){
	resp:= kmgQrcode.MustEncode(kmgQrcode.EncodeReq{
		Content: "https://www.google.com/",
	})
	err:=ioutil.WriteFile("tmp.png",resp.PngContent,0777)
	if err!=nil{
		panic(err)
	}
}

• It can not read qrcode into text, it can only translate qrcode text into png byte slice.
• fork from https://github.com/skip2/go-qrcode , with following change:
  • Make the package name easy to remember and import.
  • Simplify the caller interface, leave only one function kmgQrcode.MustEncode .
  • Delete surrounding blank, make the qrcode part as large as possible.(use float64 instead of int to generate image.)