From db74d8bdb36de7a778ed2ecbfb194fbddf6ab508 Mon Sep 17 00:00:00 2001
From: Scott Davis <jetviper21@gmail.com>
Date: Sun, 12 Jun 2011 13:36:49 -0400
Subject: [PATCH 1/3] new config option to pass options along to chunky_png

---
 lib/compass/configuration.rb          | 3 ++-
 lib/compass/configuration/defaults.rb | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/compass/configuration.rb b/lib/compass/configuration.rb
index 2990e85d..d8efb812 100644
--- a/lib/compass/configuration.rb
+++ b/lib/compass/configuration.rb
@@ -38,7 +38,8 @@ module Compass
       :color_output,
       :preferred_syntax,
       :disable_warnings,
-      :sprite_engine
+      :sprite_engine,
+      :chunky_png_options
     ].flatten
 
     # Registers a new configuration property.
diff --git a/lib/compass/configuration/defaults.rb b/lib/compass/configuration/defaults.rb
index 7c9add32..236ce672 100644
--- a/lib/compass/configuration/defaults.rb
+++ b/lib/compass/configuration/defaults.rb
@@ -133,6 +133,10 @@ module Compass
         :chunky_png
       end
       
+      def default_chunky_png_options
+        {:compression => Zlib::BEST_COMPRESSION}
+      end
+      
       # helper functions
 
       def http_join(*segments)

From dc504ecd8ee3dd5008c2aefb23262da2b2875ce7 Mon Sep 17 00:00:00 2001
From: Scott Davis <jetviper21@gmail.com>
Date: Sun, 12 Jun 2011 13:37:20 -0400
Subject: [PATCH 2/3] pass new config options to chunky_png canvas on image
 save

---
 .../sass_extensions/sprites/engines/chunky_png_engine.rb     | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/compass/sass_extensions/sprites/engines/chunky_png_engine.rb b/lib/compass/sass_extensions/sprites/engines/chunky_png_engine.rb
index c26caa11..99bca823 100644
--- a/lib/compass/sass_extensions/sprites/engines/chunky_png_engine.rb
+++ b/lib/compass/sass_extensions/sprites/engines/chunky_png_engine.rb
@@ -33,10 +33,11 @@ module Compass
           if canvas.nil?
             construct_sprite
           end
-          canvas.save(filename, :best_compression)
+          
+          canvas.save(filename,  Compass.configuration.chunky_png_options)
         end
         
       end
     end
   end
-end
\ No newline at end of file
+end  
\ No newline at end of file

From 84f7b7a5efeb0329b5bc97c9c7a4ed6359af5c29 Mon Sep 17 00:00:00 2001
From: Scott Davis <jetviper21@gmail.com>
Date: Sun, 12 Jun 2011 15:16:20 -0400
Subject: [PATCH 3/3] added docs for chunky_png_options config

---
 .../help/tutorials/configuration-reference.markdown        | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc-src/content/help/tutorials/configuration-reference.markdown b/doc-src/content/help/tutorials/configuration-reference.markdown
index 642707ca..02682243 100644
--- a/doc-src/content/help/tutorials/configuration-reference.markdown
+++ b/doc-src/content/help/tutorials/configuration-reference.markdown
@@ -280,6 +280,13 @@ later on.
     <td style="vertical-align:top;">Symbol </td>
     <td style="vertical-align:top;">Defaults to <code>:chunky_png</code></td>
   </tr>
+  <tr>
+    <td style="vertical-align:top;"><code>chunky_png_options</code></td>
+    <td style="vertical-align:top;">Hash </td>
+    <td style="vertical-align:top;">
+      Defaults to <code>{:compression => Zlib::BEST_COMPRESSION}</code>. See the chunky_png <a href='https://github.com/wvanbergen/chunky_png/wiki/Constraints' _target='blank'>wiki</a> for more information
+    </td>
+  </tr>
 </table>
 
 <a name="configuration-functions"></a>