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// To make images retina, add a class "2x" to the img element
// and add a <image-name>@2x.png image. Assumes jquery is loaded.
function isRetina() {
var mediaQuery = "(-webkit-min-device-pixel-ratio: 1.5),\
(min--moz-device-pixel-ratio: 1.5),\
(-o-min-device-pixel-ratio: 3/2),\
(min-resolution: 1.5dppx)";
if (window.devicePixelRatio > 1)
return true;
if (window.matchMedia && window.matchMedia(mediaQuery).matches)
return true;
return false;
};
function retina() {
if (!isRetina())
return;
$("img.2x").map(function(i, image) {
var path = $(image).attr("src");
path = path.replace(".png", "@2x.png");
path = path.replace(".jpg", "@2x.jpg");
$(image).attr("src", path);
});
};
$(document).ready(retina);