ivanhjiangwen

function convertImgToBase64(url, callback, outputFormat) {
    var canvas = document.createElement('CANVAS'),
        ctx = canvas.getContext('2d'),
        img = new Image;
    img.crossOrigin = 'Anonymous';
    img.onload = function () {
        var dataURL;
        canvas.height = img.height;
        canvas.width = img.width;
        ctx.drawImage(img, 0, 0);