Base64 Image Encoder via HTML5 Canvas

HTML

              
                <noscript>
    <div class="ns pt5"><span style="font-size:24px">This demo needs JavaScript</span></div>
</noscript>

<div class="all_wrapper">
    <div class="ib">
        <p class="ms"><span id="note" data-title="Use local file" class="sbg">Use local file</span></p>
        <p class="pm0 ms">
            <input type="file" id="inp" class="ms">
        </p>
    </div>
    <div class="ib">
        <p class="ms"><span data-title="Use external URL" id="notee" class="sbg">Use external URL</span></p>
        <p class="pm0 ms">
            <input type="url" id="inp_url" placeholder="image url" class="ms green">
            <input type="button" value="submit" class="ms" id="submit_url" disabled>
        </p>
    </div>
    <div class="inner_holder">
        <canvas class="canvas_styling" id="imageCanvas"></canvas>
    </div>
    <div class="inner_holder">
        <p id="st" class="ms"><small>Click below to select</small></p>
        <textarea rows="1" id="output_url" class="URI_textarea ms" onclick="this.select();document.getElementById('st').innerHTML=this.getAttribute('data-text')?'...':'Selected..';" onblur="document.getElementById('st').innerHTML=!this.getAttribute('data-text')?'Click below to select':this.getAttribute('data-text');"
        wrap="off" readonly></textarea>
        <h3 class="sub_title ms" id="sub_title">Your base-64 encoded image!</h3>
    </div>
</div>
<div class="picture-container">
  <img onclick="this.src=document.getElementById('output_url').value" id="picture" class="picture" src="data:image/jpeg;base64,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">
</div>

<a id="try-it" href="#">
  <img class="button-try" src="http://remmache.fr/map/button.svg">
</a>

CSS

              
                body {
    background-color: #eee;
}

* {
    line-height: normal !important;
}

body,
.ms {
    font-family: consolas, monaco, menlo, courier, monospace;
    text-align: center;
}

.pm0 {
    padding: 0;
    margin: 0;
}

.pt5 {
    padding-top: 5px;
}

.URI_textarea {
    font-size: 14px;
    padding: 10px;
    margin: 0;
    border: 0;
    box-shadow: 1px 1px 2px #555 inset;
    background-color: #ddd;
    color: darkgreen;
    resize: none;
}

.canvas_styling {
    opacity: 0;
    transition: opacity .5s;
    display: inline-block;
    border-radius: 8px;
    padding: 20px;
    background-color: #888;
    box-shadow: 0 0 20px #555 inset;
}

.inner_holder {
    box-sizing: border-box;
    overflow: auto;
    border-radius: 4px;
    display:none;
}

.URI_textarea,
.canvas_holder,
.all_wrapper,
.ib,
input {
    box-sizing: border-box;
}

.all_wrapper,
.URI_textarea {
    width: 100%;
}

.all_wrapper p,
.sub_title,
.all_wrapper,
.ns {
    text-align: center;
}

#inp:hover {
    cursor: pointer;
}

.sub_title {
    color: darkgreen;
}

input[type="button"] {
    background-color: #ddd;
}

.sbg,
input[type="button"],
#inp_url {
    border-radius: 4px;
    padding: 10px 20px;
}

#inp::-webkit-file-upload-button {
    border-radius: 4px;
    padding: 10px 20px;
    font-family: consolas, monaco, menlo, courier, monospace;
    border: 1px solid #555;
}

input[type="button"],
#inp_url {
    border: 1px solid #555;
}

#inp_url,
#submit_url {
    display: block;
    width: 100%;
    margin: 0 auto;
}

#submit_url {
    margin-top: 10px;
}

input[type="button"]:hover {
    background-color: #888;
    color: #fff;
    cursor: pointer;
}

#inp::-webkit-file-upload-button:hover {
    background-color: #888;
    color: #fff;
    cursor: pointer;
}

input[type="button"]:disabled {
    cursor: not-allowed;
    background-color: #ccc;
    color: #777;
}

input[type="button"]:focus {
    outline-color: #333;
}

#inp::-webkit-file-upload-button:focus {
    outline-color: #333;
}

.sbg {
    background-color: #333;
    color: #fff;
    padding: 10px 20px;
}

.all_wrapper {
    padding: 10px 0;
}

.ib {
    display: inline-block;
    vertical-align: top;
    margin-bottom: 20px;
}

.green {
    color: darkgreen;
}

.all_wrapper,
.inner_holder {
    display: none;
}

@media (max-width:640px) {
    .ib {
        display: block;
        margin: 0;
        width: 100%;
    }
    .ib:nth-child(2) {
        margin-top: 5px;
        margin-bottom: 20px;
    }
    #inp_url,
    #submit_url {
        width: 200px;
        max-width: 100%;
    }
    .pt5 {
        padding: 0;
    }
}


/* Base */

body {
  background: url(https://jaysalvat.github.io/jquery.facedetection/assets/background.jpg);
}

a {
  color: inherit;
  text-decoration: none;
}

.logo {
  position: relative;
  display: block;
  margin: 20px auto;
  width: 400px;
}

.button-try {
  position: relative;
  display: block;
  margin: -80px auto 20px;
  width: 250px;
}

.button-download {
  display: block;
  margin: 50px auto;
  width: 160px;
  text-transform: uppercase;
  padding: 20px;
  border: 3px solid #fff;
  border-radius: 10px;
  text-align: center;
  color: #fff;
  font: bold 0.8em Arial, sans-serif;
}

  .button-visit:hover {
    background: rgba(255, 255, 255, 0.1);
  }

.picture-container {
  position: relative;
  width: 600px;
  height: 100%;
  margin: 20px auto;
  border: 10px solid #fff;
  background: #000;
  box-shadow: 0 5px 5px #000;
}

  .picture {
    display: block;
    width: 100%;
    height: auto;
  }
  
.face {
  position: absolute;
  border: 2px solid #FFF;
  padding:-40px;
}
#imageCanvas{
    display:none;
}

JS

              
                (function (d) {
    "use strict";
    //Elements/objects global variables
    var inp, out, note, notee, st, sut, iu, su, ch, aw, canvas, c2d;

    //Get element(s) (by Id or Class)
    function q(a) {        
        var buff;
        if (!(/^\./.test(a))) {
            if (d.getElementById(a)) {
                buff = d.getElementById(a);
            } else {
                buff = d.querySelector(a);
            }
        } else {
            buff = Array.prototype.slice.call(d.querySelectorAll(a));
        }
        return buff;
    }

    //IMG TESTER
    function imt(a) { // test the local file's tail-strings (allowed image format/extension)
        return (/jpe?g|gif|png|bmp|webp|svg/i).test(a);
    }

    //ELEMENTS/OBJECTS VARS INIT
    inp = q("inp"); //input file
    out = q("output_url"); //the base64 URI output text
    note = q("note"); //local file notification
    notee = q("notee"); //external url notification
    st = q("st"); //the "select"
    sut = q("sub_title"); //the bottom notification
    iu = q("inp_url"); //external url input
    su = q("submit_url"); //external url button
    ch = q(".inner_holder"); //inner holders (plural)
    aw = q(".all_wrapper")[0]; //outer holder
    canvas = q("imageCanvas"); //the canvas
    //[canvas] related
    c2d = canvas.getContext("2d");

    //CHECK HTML5 COMPATIBILITY
    (function () {
        aw.style.display = "block";
        if ((typeof canvas !== "object") && (typeof FileReader !== "function")) {
            aw.innerHTML = "<span style='font-size:24px'>Your browser doesn't support <strong>HTML5</strong> built-in API.</span>";
            //all functions below will have no triggers, because the "all_wrapper" content is changed to be just that "span" above.
        }
    }());

    //COMMON HANDLERS
    function loadThis(a) {
        canvas.width = a.width;
        canvas.height = a.height;
        c2d.drawImage(a, 0, 0);
    }
    function showElms() {
        ch.forEach(function (v) {
            v.style.display = "block";
        });
        canvas.style.opacity = 1;
    }
    function hideElms() {
        ch.forEach(function (v) {
            v.style.display = "none";
        });
        out.removeAttribute("style");
        out.value = "";
        inp.value = "";
        canvas.removeAttribute("style");
        st.removeAttribute("style");
        sut.removeAttribute("style");
        c2d.clearRect(0, 0, canvas.width, canvas.height);
        note.innerHTML = note.getAttribute("data-title");
        notee.innerHTML = notee.getAttribute("data-title");
        if (out.getAttribute("data-text")) {
            out.removeAttribute("data-text");
        }
        
        su.disabled = 1;
    }

    //EXTERNAL URL CHECKER
    function check_img_URL(a, b) {
        var protocol = /^https?:\/\//.test(a.value),
            btn = q(b);
        //RESET LOCAL INPUT AND OUTPUT
        if (inp.value.length) {
            inp.value = "";
        }
        note.innerHTML = note.getAttribute("data-title");
        a.removeAttribute("style");
        //hideElms();
        //CHECK URL STARTS HERE
        if (protocol && a.value.length > 20 &&
                a.value.match(/\//g).length > 2 &&
                a.value.match(/\./g).length > 1 &&
                imt(a.value)) {
            btn.disabled = 0;
        } else if (a.value.length === 0) {
            hideElms();
        } else {
            a.style.color = "brown";
            btn.disabled = 1;
        }
        
    }

    //EXTERNAL URL HANDLER (BUTTON CLICK)
    function handle_img_URL() {
        var img_url = iu.value,
            new_img = d.createElement("img"),
            word;
        new_img.src = img_url;
        new_img.addEventListener("load", function () {
            if (new_img.complete) {
                try { //umm...
                    loadThis(new_img); //draw the image to [canvas].
                    out.value = c2d.getImageData(0, 0, new_img.width, new_img.height).data; //get URI.
                    notee.innerHTML = "Done!"; //not really.
                } catch (error) { //this'd certainly happen.
                    if (error) {
                        word = error.toString();
                        word = word.substring(0, word.indexOf(":"));
                        out.setAttribute("data-text", "<span style='color:red'>" + word + "</span>");
                        out.value = error.message;
                        out.style.color = "purple";
                        if (window.innerWidth > 1024) {
                            out.style.overflowX = "hidden";
                        }
                        st.innerHTML = "<span style='color:red'>" + word + "</span>";
                        sut.style.display = "none";
                        notee.innerHTML = "<span style='color:violet'>" + word + "</span>";
                    }
                }
                su.disabled = 1;
                showElms();
            }
        }, 0);
    }

    //LOCAL FILE HANDLER
    function handleImage(e) { // http://stackoverflow.com/a/10906961
        //the "e" is the "change" event object from the input[type='file'].
        //you can console.log(e) to find out the what's in it.
        var reader = new FileReader(),
            theFile = e.target.files[0]; //the file object being loaded.
        try {
            if (imt(theFile.type)) { //test if it has the allowed format, using imt() function - declared above.
                //to get the file size, use [size] key                
                //as in: theFile.size (using the variable "theFile") <- it's in Bytes (number).
                //to get the file name, use [name] key
                //example: theFile.name <- returns string
                reader.readAsDataURL(theFile);
                //wait for the image to load.
                reader.addEventListener("load", function (ev) {
                    //the "ev" parameter is the "reader" variable load event object.
                    //you can console.log(ev) to find out what's in it.
                    var img = d.createElement("img"); //create [img] object.
                    //the conversion product is right here [ev.target.result]
                    img.src = ev.target.result; //the [img] source -> base64 URI strings.
                    //And then listen to the load event of that [img] object.
                    img.addEventListener("load", function () {
                        loadThis(img); //draw that [img] to the [canvas].
                    }, 0);
                    out.value = img.src; //base64 URI strings.
                    $('.face').remove();
                    $('#picture').attr('src', document.getElementById('output_url').value);

                    note.innerHTML = "Done!"; //notification.
                    st.innerHTML = "Click below to select"; //notification.
                }, 0);
            } else {
                window.alert("Only jpg, jpeg, gif, png, bmp, webp, and svg");
                hideElms();
                return;
            }
        } catch (error) {
            if (error) { // This happens when we cancel the file window opener.
                hideElms();
                return;
            }
        }
        out.removeAttribute("style");
        showElms();
    }

    //EVENT LISTENERS
    su.onclick = handle_img_URL;
    inp.onclick = function () {
        hideElms();
        iu.value = "";
    };
    inp.onchange = handleImage;
    iu.oninput = function () {
        check_img_URL(iu, "submit_url");
    };
    iu.onclick = function () {
        iu.select();
    };
}(document));
//This demo uses the built-in input[type="file"] display with subtle CSS override.
//This is a neat snippet by Chris Coyier for styling that exciting HTML5 element: https://css-tricks.com/snippets/css/custom-file-input-styling-webkitblink/

$('#try-it').click(function (e) {
  e.preventDefault();
  
  $('.face').remove();

  $('#picture').faceDetection({
    complete: function (faces) {
      for (var i = 0; i < faces.length; i++) {
        $('<div>', {
          'class':'face',
          'css': {
            'position': 'absolute',
            'left':   ((faces[i].x * faces[i].scaleX ) - 15)+ 'px',
            'top':    ((faces[i].y * faces[i].scaleY) - 25) + 'px',
            'width':  ((faces[i].width  * faces[i].scaleX) + 30) + 'px',
            'height': ((faces[i].height * faces[i].scaleY) + 40) + 'px',
             'bottom' : '-20px'
          }
        })
        .insertAfter(this);
      }
    },
    error:function (code, message) {
      alert('Error: ' + message);
    }
  });
});

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