diff -up orig/imageapi/imageapi_gd.module patched/imageapi/imageapi_gd.module
--- orig/imageapi/imageapi_gd.module	2011-05-16 17:22:12.000000000 +0100
+++ patched/imageapi/imageapi_gd.module	2011-10-05 17:10:23.714542000 +0100
@@ -71,7 +71,7 @@ function imageapi_gd_image_open($image) 
  * @return
  *   TRUE or FALSE, based on success.
  */
-function imageapi_gd_image_close($image, $destination) {
+function imageapi_gd_image_close($image, $destination, $op = NULL) {
   $extension = str_replace('jpg', 'jpeg', $image->info['extension']);
   $function = 'image'. $extension;
   if (!function_exists($function)) {
@@ -81,7 +81,16 @@ function imageapi_gd_image_close($image,
     imageinterlace($image->resource, 1);
   }
   if ($extension == 'jpeg') {
-    return $function($image->resource, $destination, variable_get('imageapi_jpeg_quality', 75));
+    if (empty($op)){
+      $op = new stdClass();
+    }
+    $op->quality = variable_get('imageapi_jpeg_quality', 75);
+
+    // Allow other modules to alter if the following member variables are present:
+    if (isset($op->module) && isset($op->name)) {
+      drupal_alter('imageapi_quality', $op);
+    }
+    return $function($image->resource, $destination, $op->quality);
   }
   else {
     // Always save PNG images with full transparency.
diff -up orig/imageapi/imageapi_imagemagick.module patched/imageapi/imageapi_imagemagick.module
--- orig/imageapi/imageapi_imagemagick.module	2011-05-16 17:22:12.000000000 +0100
+++ patched/imageapi/imageapi_imagemagick.module	2011-10-05 16:40:00.231133000 +0100
@@ -101,8 +101,8 @@ function imageapi_imagemagick_image_open
   return $image;
 }
 
-function imageapi_imagemagick_image_close($image, $dst) {
-  return _imageapi_imagemagick_convert($image->source, $dst, $image->ops);
+function imageapi_imagemagick_image_close($image, $dst, $op = NULL) {
+  return _imageapi_imagemagick_convert($image->source, $dst, $image->ops, $op);
 }
 
 function imageapi_imagemagick_image_crop(&$image, $x, $y, $width, $height) {
@@ -144,8 +144,18 @@ function imageapi_imagemagick_image_desa
 /**
  * Calls the convert executable with the specified filter.
  */
-function _imageapi_imagemagick_convert($source, $dest, $args) {
-  $args['quality'] = '-quality '. escapeshellarg(variable_get('imageapi_imagemagick_quality', 75));
+function _imageapi_imagemagick_convert($source, $dest, $args, $op = NULL) {
+  if (empty($op)){
+    $op = new stdClass();
+  }
+  $op->quality = variable_get('imageapi_imagemagick_quality', 75);
+
+  // Allow other modules to alter if the following member variables are present:
+  if (isset($op->module) && isset($op->name)) {
+    drupal_alter('imageapi_quality', $op);
+  }
+  $args['quality'] = '-quality '. escapeshellarg($op->quality);
+
   // To make use of ImageMagick 6's parenthetical command grouping we need to make
   // the $source image the first parameter and $dest the last.
   // See http://www.imagemagick.org/Usage/basics/#cmdline for more info.
diff -up orig/imageapi/imageapi.module patched/imageapi/imageapi.module
--- orig/imageapi/imageapi.module	2011-05-16 17:22:12.000000000 +0100
+++ patched/imageapi/imageapi.module	2011-10-05 16:51:36.771515000 +0100
@@ -157,11 +157,12 @@ function imageapi_default_toolkit() {
  * @return
  *   Mixed values (typically Boolean indicating successful operation).
  */
-function imageapi_toolkit_invoke($method, &$image, array $params = array()) {
+function imageapi_toolkit_invoke($method, &$image, array $params = array(), $op = NULL) {
   $function = $image->toolkit . '_image_' . $method;
   if (function_exists($function)) {
     array_unshift($params, $image);
     $params[0] = &$image;
+    $params['op'] = $op;
     return call_user_func_array($function, $params);
   }
   watchdog('imageapi', 'The selected image handling toolkit %toolkit can not correctly process %function.', array('%toolkit' => $image->toolkit, '%function' => $function), WATCHDOG_ERROR);
@@ -396,11 +397,11 @@ function imageapi_image_open($file, $too
  * @return
  *   TRUE or FALSE, based on success.
  */
-function imageapi_image_close($image, $destination = NULL) {
+function imageapi_image_close($image, $destination = NULL, $op = NULL) {
   if (empty($destination)) {
     $destination = $image->source;
   }
-  if ($return = imageapi_toolkit_invoke('close', $image, array($destination))) {
+  if ($return = imageapi_toolkit_invoke('close', $image, array($destination), $op)) {
     // Clear the cached file size and refresh the image information.
     clearstatcache();
     $image->info = image_get_info($destination);
Only in patched/imageapi: translations