Favicons

app/uploaders/image_uploader.rb

@@ -28,6 +28,16 @@ class ImageUploader < CarrierWave::Uploader::Base
   #   # do something
   # end
 
+  def efficient_conversion(width, height)
+    manipulate! do |img|
+      img.format("png") do |c|
+        c.resize      "#{width}x#{height}>"
+        c.resize      "#{width}x#{height}<"
+      end
+      img
+    end
+  end
+
   #Max size
   process resize_to_limit: [2000, 2000]
 
@@ -40,6 +50,16 @@ class ImageUploader < CarrierWave::Uploader::Base
 	process resize_to_limit: [300, 300]
   end
 
+  version :icon do
+    process efficient_conversion: [256, 256]
+    
+    def png_url
+      return nil if self.url.nil?
+      #mega hack
+      self.url[0..-4] + "png"
+    end
+  end
+
   # Add a white list of extensions which are allowed to be uploaded.
   # For images you might use something like this:
   def extension_whitelist

app/views/layouts/application.html.erb

@@ -11,6 +11,10 @@
 		<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
 		<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>
 
+		<% unless current_blog.nil? || current_blog.logo.icon.url.nil? %>
+		<%= favicon_link_tag current_blog.logo.icon.png_url %>
+		<% end %>
+
 		<%= yield :head %>
 	</head>