CODEWITHSUNDEEP
javascriptphpjqueryhtmlcss
Sunil Bhawsar
Sunil Bhawsar

Reputation: 199

How to Convert HTML code or data containing (image tag and some text) into image for download

I want to render some Html code as an image to download for my website. I am using html2canvas that is working fine to create image for text but I want to create image from html div,img,text,paragraph.

I am using below code to render html into image 

<!DOCTYPE html>
<html>
<head lang="en">



</head>
<body>
<div><h1>HTML content to render:</h1>

    <div id="content">
        <img src="./images/127597554.jpg" height="200" width="200">
        Hello <strong>visiting</strong> guest
    </div>

</div>
<h1>Existing canvas:</h1>
<canvas width="500" height="200"></canvas>
<script type="text/javascript" src="../dist/html2canvas.js"></script>
<button>Run html2canvas</button>
<script type="text/javascript">
    var canvas = document.querySelector("canvas");
    var ctx = canvas.getContext("2d");
    var ctx = canvas.getContext('2d');
document.querySelector("button").addEventListener("click", function() {
        html2canvas(document.querySelector("#content"), {canvas: canvas}).then(function(canvas) {
            console.log('Drew on the existing canvas');
        });
    }, false);

</script>
</body>
</html>

I tried some third party api to achive the image but their is a limit.So i want to achive this using the code. How can i achive this.

I want an image of the below caode

<div><h1>HTML content to render:</h1>

    <div id="content">
        <img src="./images/127597554.jpg" height="200" width="200">
        Hello <strong>visiting</strong> guest
    </div>

</div>

I want to get the result like this

enter image description here

Upvotes: 2

Views: 2843

Answers (2)

Wolfgang
Wolfgang

Reputation: 896

You can embed the html in a svg to render it at the canvas, e.g.

html:

<canvas id="canvas" style="border:2px solid black;" width="160" height="43"></canvas>

js:

var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');

var data = '<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200">' +
            '<foreignObject width="100%" height="100%">' +
            '<div xmlns="http://www.w3.org/1999/xhtml" style="font-size:40px">' +
                '<em>I</em> like ' +
                '<span style="color:white; text-shadow:0 0 2px blue;">' +
                'SO</span>' +
            '</div>' +
            '</foreignObject>' +
            '</svg>';

var DOMURL = window.URL || window.webkitURL || window;

var img = new Image();
var svg = new Blob([data], { type: 'image/svg+xml;charset=utf-8' });
var url = DOMURL.createObjectURL(svg);

img.onload = function () {
    ctx.drawImage(img, 0, 0);
    DOMURL.revokeObjectURL(url);
}

img.src = url;

fiddle: https://jsfiddle.net/qkvu7fmL/

I couldn't find a reference to the original source of this example- if somebody knows- please add credits as comments.

Upvotes: 1

Simon Kirsten
Simon Kirsten

Reputation: 2577

Use rasterizeHTML.js:

From the example:

<canvas id="canvas" width="400" height="200"></canvas>
<script type="text/javascript">
    var canvas = document.getElementById("canvas");

    rasterizeHTML.drawHTML(
        '<div><h1>HTML content to render:</h1>' + 
        '    <div id="content">' + 
        '        <img src="./images/127597554.jpg" height="200" width="200">' + 
        '        Hello <strong>visiting</strong> guest' + 
        '    </div>' + 
        '</div>',
        canvas);
</script>

Or just:

rasterizeHTML.drawURL("http://example.net", canvas);

To download the image use canvas2image (with a hidden canvas):

Canvas2Image.saveAsPNG(canvas, width, height);

The major advantages of doing the rendering on the client are that the html can be user specific and the server does not have to render the image.

Upvotes: 2

Related Questions