added optional support for generating absolute paths

Imagine/CachePathResolver.php

@@ -45,8 +45,9 @@ public function __construct(RouterInterface $router, Filesystem $filesystem, $we
      *
      * @param string $path
      * @param string $filter
+     * @param boolean $absolute
      */
-    public function getBrowserPath($targetPath, $filter)
+    public function getBrowserPath($targetPath, $filter, $absolute = false)
     {
         if (0 === strpos($targetPath, $this->webRoot)) {
              $targetPath = substr($targetPath, strlen($this->webRoot));
@@ -57,7 +58,7 @@ public function getBrowserPath($targetPath, $filter)
         $path = str_replace(
             urlencode($params['path']),
             urldecode($params['path']),
-            $this->router->generate('_imagine_'.$filter, $params)
+            $this->router->generate('_imagine_'.$filter, $params, $absolute)
         );
 
         return $path;

README.md

@@ -134,10 +134,23 @@ In this example, the final rendered path would be something like
 `/media/cache/my_thumb/relative/path/to/image.jpg`. This is where Imagine
 would save the filtered image file.
 
+In order to get an absolute path to the image add another parameter with the value true:
+
+``` jinja
+<img src="{{ '/relative/path/to/image.jpg' | imagine_filter('my_thumb', true) }}" />
+```
+
+Or if you're using PHP templates:
+
+``` php
+<img src="<?php $this['imagine']->filter('/relative/path/to/image.jpg', 'my_thumb', true) ?>" />
+```
+
 Note: Using the ``dev`` environment you might find that the images are not properly rendered when
 using the template helper. This is likely caused by having ``intercept_redirect`` enabled in your
 application configuration. To ensure that the images are rendered disable this option:
 
+
 ``` jinja
 web_profiler:
     intercept_redirects: false

Templating/Helper/ImagineHelper.php

@@ -27,12 +27,13 @@ public function __construct(CachePathResolver $cachePathResolver)
      *
      * @param string $path
      * @param string $filter
+     * @param boolean $absolute
      *
      * @return string
      */
-    public function filter($path, $filter)
+    public function filter($path, $filter, $absolute = false)
     {
-        return $this->cachePathResolver->getBrowserPath($path, $filter);
+        return $this->cachePathResolver->getBrowserPath($path, $filter, $absolute);
     }
 
     /**

Templating/ImagineExtension.php

@@ -38,12 +38,13 @@ public function getFilters()
      *
      * @param string $path
      * @param string $filter
+     * @param boolean $absolute
      *
      * @return string
      */
-    public function filter($path, $filter)
+    public function filter($path, $filter, $absolute = false)
     {
-        return $this->cachePathResolver->getBrowserPath($path, $filter);
+        return $this->cachePathResolver->getBrowserPath($path, $filter, $absolute);
     }
 
     /**