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qrcode-logo

v1.1.8

Published

qrcode fill with logo

Downloads

27

Readme

#qrcode-logo 基于node-gd图形处理库,用于生成带logo的二维码图片。

#效果

#安装 npm install qrcode-logo --save

##关于node-gd qrcode-logo依赖于node-gd, 若无法正常安装node-gd,请参考node-gd安装文档: https://www.npmjs.com/package/node-gd

#示例 ##生成带logo的二维码

var fs = require('fs'),
    qrCodeLogo = require('qrcode-logo'),

    url = 'https://www.baidu.com/',
    qrcodeImgFilePath = '/Users/test/myworkspace/qr_logo.png',
    logoBuffer = fs.readFileSync('/Users/test/myworkspace/logo.png', {
        encoding: null
    });

qrCodeLogo(url, qrcodeImgFilePath, {
    size: 10,  // 二维码单位块大小
    logo: logoBuffer // logo数据
});

##仅生成二维码图片

var fs = require('fs'),
    qrCodeLogo = require('qrcode-logo'),

    url = 'https://www.baidu.com/',
    qrcodeImgFilePath = '/Users/test/myworkspace/qr.png';

qrCodeLogo(url, qrcodeImgFilePath, function (err, img) {
    console.log(err, img); // img为生成二维码图片信息(包含高度、宽度等信息)
});

##生成带logo(带圆角边框)且带底部文本的二维码图片

var fs = require('fs'),
    qrCodeLogo = require('qrcode-logo'),

    url = 'https://www.baidu.com/',
    qrcodeImgFilePath = '/Users/test/myworkspace/qr_logo.png',
    logoBuffer = fs.readFileSync('/Users/test/myworkspace/logo.png', {
        encoding: null
    });

qrCodeLogo(url, qrcodeImgFilePath, {
    size: 10,  // 二维码单位块大小
    margin: 2,
    logo: logoBuffer, // logo数据
    logoBorder: {   // border边框配置
        width: 4,
        color: 0xcccfff
    },
    bottomText: {  // 底部文本框配置
        text: 'A12',
        bgColor: 0xeeefff
    }
});

#API

##调用方式 qrcode(text, outpath, qrOpts, cb) 或 qrcode(text, outpath, cb)

##参数 ###text(必填) (String)生成二维码的文本、url。

###outpath(必填) (String)生成的二维码图片的文件路径。

###cb(可选) 生成二维码图片文件回调方法: function (err, img) { // err 错误认息 // img 生成的二维码图片信息(高度、宽度、色值等) }

###qrOpts.size(可选) (Number)二维码图片中二维码每块大小,默认值为10(pixel)。(二维码版本区间为version1 ~ version40, 每个版本对应块数不同。该插件生成的二维码基本由41块组成,即整个二维码图片宽度为:41 * qrOpts.size + qrOpts.margin * 2 * qrOpts.size)

###qrOpts.margin(可选) (Number) 二维码周边的留白的块数,默认4(注意,此处不是真实的像素大小)。

###qrOpts.parse_url(可选) (Boolean)是否优化处理text为url的情况, 默认为true

###qrOpts.logo(可选) (Buffer) logo图片的buffer数据(目前仅支持png、jpeg格式图片)。 logo图片会设置额外背景色为白色(若logo为透明背景,则背景色会改为白色)

###qrOpts.logoBorder.width(可选) (Number)边框大小(pixel)。值为空时,不作边框渲染。

###qrOpts.logoBorder.radius(可选) (Number)logo圆角大小, 默认值为10(pixel)。

###qrOpts.logoBorder.color(可选) (Number)边框颜色,使用十六进制颜色值.默认值为0xffffff.

###qrOpts.bottomText.height(可选) (Number)文本框高度。默认值45。

###qrOpts.bottomText.align(可选) (String) 文本对齐方式。默认居中对齐。

###qrOpts.bottomText.size(可选) (Number)文本字体大小。默认值25。

###qrOpts.bottomText.angle(可选) (Number) 文本旋转角度,默认0(0~360)。

###qrOpts.bottomText.color(可选) (Number) 文本颜色,使用十六进制颜色值。默认值0x000000。

###qrOpts.bottomText.bgColor(可选) (Number) 文本框背景颜色,使用十六进制颜色值。默认值0xffffff。

###qrOpts.bottomText.fontFilePath(可选) (String) 文本字体文件路径。仅支持ttf字体文件。默认为楷体(gb-2312).