gistfile1.sass

// Retina helper mixins for Compass
// http://www.joelambert.co.uk
//
// Copyright 2012, Joe Lambert.
// Free to use under the MIT license.
// http://joelambert.mit-license.org/

// Inline for standard / URL for retina
=inline-background-image-retina($image)
  background-image: asset-data-uri($image)
  @if file_exists(retina_filename($image))
    @media only screen and (-webkit-min-device-pixel-ratio: 2), only screen and (-webkit-min-device-pixel-ratio: 1.5), only screen and (-webkit-min-device-pixel-ratio: 1.75)
      @include background-size(image-width($image) auto)
      background-image: image-url(retina_filename($image))