微信小程序生成海报

效果：

js1:

const cloudHelper = require('../../../helper/cloud_helper.js');

async function config1({
	cover,
	title,
	desc,
	qr,
	bg = ''
}) {
  var qr1 ="images/qr.png"
  var qr2 ="https://636c-cloud1-0gu29f2j63906b7e-1319556650.tcb.qcloud.la/activitycomm/setup/3b6b18d28389704ae0288f82f0664434.png"

  //  **2. 获取二维码图片信息**
 
  //**3. 获取头像图片信息**

	if (cover.startsWith('cloud'))
    cover = await cloudHelper.getTempFileURLOne(cover);

	if (qr.startsWith('cloud'))
    qr = await cloudHelper.getTempFileURLOne(qr);

	let posterConfig = {
		width: 480, // rpx
		height: 650,
		backgroundColor: '#eeeeee'
	};
	if (bg) posterConfig.ba