vendor/assets/javascripts/retina.js in retina_rails-0.0.3 vs vendor/assets/javascripts/retina.js in retina_rails-0.0.4

@@ -26,13 +26,11 @@
 
     context.onload = function() {
       var images = document.getElementsByTagName("img"), retinaImages = [], i, image;
       for (i = 0; i < images.length; i++) {
         image = images[i];
-        if ($(image).attr('data-retina') != 'true') {
-          retinaImages.push(new RetinaImage(image));
-        }
+        retinaImages.push(new RetinaImage(image));
       }
       existing_onload();
     }
   };
 
@@ -52,13 +50,19 @@
   };
 
 
   root.RetinaImagePath = RetinaImagePath;
 
-  function RetinaImagePath(path) {
+  function RetinaImagePath(path, at_2x_path) {
     this.path = path;
-    this.at_2x_path = path.replace(/\.\w+$/, function(match) { return "@2x" + match; });
+    if (typeof at_2x_path !== "undefined" && at_2x_path !== null) {
+      this.at_2x_path = at_2x_path;
+      this.perform_check = false;
+    } else {
+      this.at_2x_path = path.replace(/\.\w+$/, function(match) { return "@2x" + match; });
+      this.perform_check = true;
+    }
   }
 
   RetinaImagePath.confirmed_paths = [];
 
   RetinaImagePath.prototype.is_external = function() {
@@ -67,10 +71,12 @@
 
   RetinaImagePath.prototype.check_2x_variant = function(callback) {
     var http, that = this;
     if (this.is_external()) {
       return callback(false);
+    } else if (!this.perform_check && typeof this.at_2x_path !== "undefined" && this.at_2x_path !== null) {
+      return callback(true);
     } else if (this.at_2x_path in RetinaImagePath.confirmed_paths) {
       return callback(true);
     } else {
       http = new XMLHttpRequest;
       http.open('HEAD', this.at_2x_path);
@@ -99,10 +105,10 @@
 
 
 
   function RetinaImage(el) {
     this.el = el;
-    this.path = new RetinaImagePath(this.el.getAttribute('src'));
+    this.path = new RetinaImagePath(this.el.getAttribute('src'), this.el.getAttribute('data-at2x'));
     var that = this;
     this.path.check_2x_variant(function(hasVariant) {
       if (hasVariant) that.swap();
     });
   }