Added split processing option

README.textile

@@ -114,6 +114,18 @@ This is useful if you don't want the background job to reprocess all styles.
   end
 </code></pre>
 
+h4. Split processing
+
+You can process some styles in the foreground and some in the background by setting only_process on both has_attached_file and process_in_background.
+
+<pre><code>
+  class User < ActiveRecord::Base
+    has_attached_file :avatar, :styles => { :small => "25x25#", :medium => "50x50x" }, :only_process => [:small]
+
+    process_in_background :avatar, :only_process => [:medium]
+  end
+</code></pre>
+
 h4. Reprocess Without Delay
 
 This is useful if you don't want the background job.  It accepts individual styles to.  Take note, normal `reprocess!` does not accept

lib/delayed_paperclip/attachment.rb

@@ -13,12 +13,12 @@ def self.included(base)
     module InstanceMethods
 
       def delayed_options
-        @instance.class.paperclip_definitions[@name][:delayed]
+        @options[:delayed]
       end
 
       # Attr accessor in Paperclip
       def post_processing_with_delay
-        !delay_processing?
+        !delay_processing? || split_processing?
       end
 
       def post_processing_with_delay=(value)
@@ -34,6 +34,10 @@ def delay_processing?
           !@post_processing_with_delay
         end
       end
+
+      def split_processing?
+        @options[:only_process] && @options[:only_process] != @options[:delayed][:only_process]
+      end
 
       def processing?
         @instance.send(:"#{@name}_processing?")

test/base_delayed_paperclip_test.rb

@@ -185,6 +185,15 @@ def test_delayed_paperclip_functioning_with_paperclip_only_process_option
     dummy.save!
     process_jobs
   end
+
+  def test_delayed_paperclip_functioning_with_only_process_and_paperclip_only_process_option
+    reset_class "Dummy", :with_processed => true, :only_process => [:small], :paperclip => { :only_process => [:thumbnail] }
+    Paperclip::Attachment.any_instance.expects(:post_process).with(:thumbnail)
+    Paperclip::Attachment.any_instance.expects(:reprocess!).with(:small)
+    dummy = Dummy.new(:image => File.open("#{RAILS_ROOT}/test/fixtures/12k.png"))
+    dummy.save!
+    process_jobs
+  end
 
   def test_delayed_paperclip_should_convert_image_formats
     reset_class "Dummy", :with_processed => true, :paperclip => { :styles => {:thumbnail => ['12x12', :jpg]} }