svg-liveness.html - mozsearch

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<!DOCTYPE html>

<html>

<body>

<script>

var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');

svg.setAttribute('style', 'display: block; width: 0; height: 0');

var defs = document.createElementNS('http://www.w3.org/2000/svg', 'defs');

var dropShadowFilter = document.createElementNS('http://www.w3.org/2000/svg', 'filter');

dropShadowFilter.setAttribute('id', 'drop-shadow');

var gaussianFilter = document.createElementNS('http://www.w3.org/2000/svg', 'feGaussianBlur');

gaussianFilter.setAttribute('in', 'SourceAlpha');

gaussianFilter.setAttribute('stdDeviation', '0');

dropShadowFilter.appendChild(gaussianFilter);

var offset = document.createElementNS('http://www.w3.org/2000/svg', 'feOffset');

offset.setAttribute('dx', '0');

offset.setAttribute('dy', '0');

offset.setAttribute('result', 'offsetblur');

dropShadowFilter.appendChild(offset);

var flood = document.createElementNS('http://www.w3.org/2000/svg', 'feFlood');

flood.setAttribute('flood-color', 'rgba(0,0,0,1)');

dropShadowFilter.appendChild(flood);

var composite = document.createElementNS('http://www.w3.org/2000/svg', 'feComposite');

composite.setAttribute('in2', 'offsetblur');

composite.setAttribute('operator', 'in');

dropShadowFilter.appendChild(composite);

var merge = document.createElementNS('http://www.w3.org/2000/svg', 'feMerge');

var mergeNode = document.createElementNS('http://www.w3.org/2000/svg', 'feMergeNode');

merge.appendChild(mergeNode);

var mergeNode = document.createElementNS('http://www.w3.org/2000/svg', 'feMergeNode');

mergeNode.setAttribute('in', 'SourceGraphic');

merge.appendChild(mergeNode);

dropShadowFilter.appendChild(merge);

defs.appendChild(dropShadowFilter);

svg.appendChild(defs);

document.body.appendChild(svg);

</script>

<canvas id="canvas" width="100" height="100"></canvas>

<script>

var canvas = document.getElementById('canvas');

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

ctx.filter = 'url(#drop-shadow)';

offset.setAttribute('dy', '10');

ctx.fillStyle = '#0f0';

ctx.fillRect(25, 25, 50, 40);

</script>

</body>

</html>