Pointiller/demo.html at master · zogs/Pointiller · GitHub

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<!doctype html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Pointiller Test</title>
</head>
<body id="body">
    <style>
        body { background: #EEE; }

        .intro { text-align: center; margin-bottom: 50px; }

        .images { float:left; width: 200px; height: 700px; padding:10px; margin:10px; border:1px solid grey; overflow-y: scroll;}
        .images img { width:150px; }

        .canvas > div { float:left; width: 30%; }
        .canvas > div h2 { text-align: center; }
        .canvas > div canvas { width: 100%; height: 100%; border:1px solid #DDD;}

        #form { text-align: right; margin-right: 10px;}
        #form label { display: block; width: 100%;}
        #form #submit { margin: 10px 20px; }

        .debug { border:1px solid red; background:#FFF }

        #counter { position: absolute; width: 100px; padding: 3px 5px; background: #DDD; }
    </style>


    <div class="intro">
        <h1>Demo Pointiller</h1>
        <span>
            Here you can test Pointiller.js :)
            Use the script as you want. Try the form bellow to test the rendering of pointillism. Test with your own image.
        </span>
    </div>

    <div class="canvas">
        <div id="form">

            <div class="images">
                <img id="image1" crossOrigin="anonymous" src="http://i.imgur.com/TQAOVkU.jpg">
                <img id="image2" crossOrigin="anonymous" src="http://i.imgur.com/flLP8FD.png">
                <img id="image3" crossOrigin="anonymous" src="http://i.imgur.com/LHycKzT.jpg">
                <img id="image3" crossOrigin="anonymous" src="http://i.imgur.com/FApqk3D.jpg">
                <img id="image3" crossOrigin="anonymous" src="http://i.imgur.com/heXk4.jpg">
            </div>
            <form action="#">
                <p>
                    <label><strong>Ignore a color before transform:</strong></label>
                    <label for="">Color: <input type="text" name="color" value="#FFFFFF"></label>
                    <label>Tolerance : <input type="number" name="color-tolerance" value="1"></label>
                    <button type="submit" class="excludeColor">Exclude color</button>
                </p>
                <br>
                <p>
                    <label><strong>Transform to fixed size points:</strong></label>
                    <label>Size: <input type="number" name="size" value="5"></label>
                    <button type="submit" class="performFixed">Convert to points</button>
                </p>
                <br>
                <p>
                    <label><strong>Try adaptive size points:</strong></label>
                    <label>minSize: <input type="number" name="minSize" value="1"></label>
                    <label>maxSize: <input type="number" name="maxSize" value="50"></label>
                    <label>step: <input type="number" name="step" value='1'></label>
                    <label>tolerance: <input type="number" name="tolerance" value="1"></label>
                    <button type="submit" class="performAdaptive">Convert to adaptive points</button>
                </p>
                <p>
                    <label><strong>Add image for testing:</strong></label>
                    <label>Url: <input type="url" name="url" value=""></label>
                    <small>* may not work because of crossOrigin</small>
                    <button type="submit" class="addImage">Add image</button>
                </p>
            </form>
        </div>
        <div id="debug">
            <h2>Debug canvas</h2>
        </div>

        <div id="res">
            <h2>Destination canvas</h2>
            <div id="counter"></div>
            <canvas id="output" height='500' width='500'></canvas>
        </div>
    </div>

    <script type="text/javascript" src="canvas.pointiller.js"></script>
    <script type="text/javascript">

    const outcanvas = document.querySelector('#output');
    const outcontext = outcanvas.getContext('2d');
    const pointiller = new Pointiller(500,500);
    const debugcanvas = pointiller.getCanvas();
    let currentImage = null;
    document.getElementById('debug').append(debugcanvas);

    // load first image
    let img = document.querySelector('.images img:first-child');
    changeImage.apply(img);

    // add image listener
    let imgs = document.querySelectorAll('.images img');
    [...imgs].map((img) => { img.addEventListener('click', changeImage)});

    // add form listener
    document.querySelector('.performFixed').addEventListener('click', performFixed);
    document.querySelector('.performAdaptive').addEventListener('click', performAdaptive);
    document.querySelector('.excludeColor').addEventListener('click', excludeColor);
    document.querySelector('.addImage').addEventListener('click', addImage);


    function changeImage() {
        pointiller.clear();
        currentImage = this;
        pointiller.addImage(currentImage,500,500);
        performFixed();
    }

    function performFixed(e) {

        let size = document.querySelector('input[name=size]').value;

        var points = pointiller.toPoints(parseInt(size));

        showPoints(points);

        if(e) {
            e.stopPropagation();
            e.preventDefault();
        }

    }

    function performAdaptive(e) {

        let minSize = document.querySelector('input[name=minSize]').value;
        let maxSize = document.querySelector('input[name=maxSize]').value;
        let step = document.querySelector('input[name=step]').value;
        let tolerance = document.querySelector('input[name=tolerance]').value;

        var points = pointiller.toAdaptivePoints(parseInt(minSize),parseInt(maxSize),parseInt(step),parseInt(tolerance));

        showPoints(points);

        if(e) {
            e.stopPropagation();
            e.preventDefault();
        }

    }

    function hexToRgb(hex) {
        var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
        return result ? {
            r: parseInt(result[1], 16),
            g: parseInt(result[2], 16),
            b: parseInt(result[3], 16)
        } : null;
    }


    function showPoints(points) {

        const ctx = outcontext;
        ctx.clearRect(0,0,outcanvas.width,outcanvas.height);

        document.querySelector('#counter').innerHTML = points.length+' points';

        for(var i=0,len=points.length; i<len; i++) {

            let point = points[i];
            let radius = (point.w/2 < 1)? 1 : point.w/2;
            ctx.beginPath();
            ctx.arc(point.x, point.y, radius, 0, 2 * Math.PI, false);
            ctx.fillStyle = 'rgba('+point.r+','+point.g+','+point.b+','+point.a+')';
            ctx.fill();
        }

    }


    function addImage(e) {

        let url = document.querySelector('input[name=url]').value;
        let image = new Image();
        image.onload = function(){
            document.querySelector('.images').prepend(this);
            this.addEventListener('click', changeImage);
            performFixed();
        }
        image.crossOrigin = 'anonymous';
        image.src = url;

        e.preventDefault();
        e.stopPropagation();
    }

    function excludeColor(e) {

        let color = document.querySelector('input[name=color]').value;
        let tolerance = document.querySelector('input[name=color-tolerance]').value;

        color = hexToRgb(color);
        color = [color.r,color.g,color.b];
        pointiller.excludeColor(color,tolerance)

        e.preventDefault();
        e.stopPropagation();
    }


    </script>

</body>
</html>