Add support for advpng

imageapi_optimize.module

@@ -33,6 +33,14 @@ function imageapi_optimize_settings_form() {
     '#element_validate' => array('imageapi_optimize_toolkit_element_validate'),
   );
 
+  $form['imageapi_optimize_advpng'] = array(
+    '#type' => 'textfield',
+    '#title' => t('Path to advpng'),
+    '#default_value' => variable_get('imageapi_optimize_avipng', ''),
+    '#element_validate' => array('imageapi_optimize_validate_path'),
+    '#description' => t('Leave empty to skip this command. You can download it <a href="!link">here</a> (part of AdvanceCOMP).', array('!link' => 'http://advancemame.sourceforge.net/comp-download.html')),
+  );
+
   $form['imageapi_optimize_optipng'] = array(
     '#type' => 'textfield',
     '#title' => t('Path to optipng'),
@@ -160,6 +168,9 @@ function _imageapi_optimize_check_path($path) {
 function _imageapi_optimize_optimize($image, $dst) {
   switch ($image->info['mime_type']) {
     case 'image/png':
+      if ($cmd = variable_get('imageapi_optimize_advpng', '')) {
+        exec("$cmd -z -4 -q $dst");
+      }
       if ($cmd = variable_get('imageapi_optimize_optipng', '')) {
         exec("$cmd -o5 $dst");
       }