blob: f25e26355d8b41082722bac3ec5a4d9be22e4204 (
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<!DOCTYPE html>
<html>
<body>
<svg style="display: block; width: 0; height: 0">
<defs>
<filter id="color-matrix">
<feColorMatrix type="matrix" in="SourceGraphic"
values="0 0 0 0 0
0 0 0 0 255
0 0 0 0 0
0 0 0 0 255"/>
</filter>
</defs>
</svg>
<canvas id="canvas" width="100" height="100"></canvas>
<script>
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
ctx.filter = 'url(#color-matrix)';
ctx.fillStyle = '#fff';
ctx.fillRect(25, 25, 50, 50);
</script>
</body>
</html>
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