_image.css.sass in oulu-rails-0.5.8

- old
+ new

@@ -1,8 +1,10 @@
 @function image($value)
   @if string($value)
-    @if number(str-index($value, '.jpg')) or number(str-index($value, '.png')) or number(str-index($value, '.gif')) or number(str-index($value, '.svg'))
-      @return true
-    @else
-      @return null
+    $image-extensions: '.jpg' '.jpeg' '.gif' '.png' '.tiff' '.tif'
+    @each $image-extension in $image-extensions
+      @if number(str-index(to-lower-case($value), if'.jpg')) or number(str-index(to-lower-case($value), '.jpeg')) or number(str-index(to-lower-case($value), '.gif')) or number(str-index(to-lower-case($value), '.png')) or number(str-index(to-lower-case($value), '.tiff')) or number(str-index(to-lower-case($value), '.tif')) or number(str-index(to-lower-case($value), '.bmp')) or number(str-index(to-lower-case($value), '.pct')) or number(str-index(to-lower-case($value), '.jpe')) or number(str-index(to-lower-case($value), '.jfif')) or number(str-index(to-lower-case($value), '.dib'))
+        @return true
+      @else
+        @return null
   @else
     @return null