Frontsize - Example for fillRetinaImage mixin

example-retina-image.html

<svg id="svg-element">
    <path class="your-background-fill" width="100" height="75"></path>
    <path class="other-background-fill" width="100" height="100"></path>
</svg>

fill-retina-image.less

.your-background-fill {
    .fillRetinaImage("background-1x.png", "background-2x.png", cover);
}

.other-background-fill {
    .fillRetinaImage("other-background-1x.png", "other-background-2x.png", cover, "http://other-domain.com/");
}