1.图片转canvas
function ImageToCanvas(image) {
var canvas = document.createElement("canvas");
canvas.width = image.width;
canvas.height = image.height;
canvas.getContext("2d").drawImage(image, 0, 0);
return canvas;
}
2.canvas转图片
function CanvasToImage(canvas) {
var image = new Image();
image.src = canvas.toDataURL("image/png");
return image;
}
3.链接转二维码
先引入
<script src="//cdn.bootcss.com/jquery/3.1.1/jquery.min.js"></script>
<script src="//cdn.bootcss.com/jquery.qrcode/1.0/jquery.qrcode.min.js"></script>
然后
$(document).ready(function(){
$('#code').qrcode("http://baidu.com")
})
