add GaufretteFilesystemLoader

Imagine/Data/Loader/StreamLoader.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace Liip\ImagineBundle\Imagine\Data\Loader;
+
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+use Imagine\Image\ImagineInterface;
+
+class StreamLoader implements LoaderInterface
+{
+    /**
+     * @var ImagineInterface
+     */
+    protected $imagine;
+
+    /**
+     * The wrapper prefix to append to the path to be loaded.
+     *
+     * @var string
+     */
+    protected $wrapperPrefix;
+
+    /**
+     * A stream context resource to use.
+     *
+     * @var \resource|null
+     */
+    protected $context;
+
+    /**
+     * Constructor.
+     *
+     * @param \Imagine\Image\ImagineInterface $imagine
+     * @param string $wrapperPrefix
+     * @param \resource|null $context
+     */
+    public function __construct(ImagineInterface $imagine, $wrapperPrefix, \resource $context = null)
+    {
+        $this->imagine = $imagine;
+        $this->wrapperPrefix = $wrapperPrefix;
+        $this->context = $context;
+    }
+
+    /**
+     * @param string $path
+     *
+     * @return \Imagine\Image\ImageInterface
+     */
+    public function find($path)
+    {
+        $name = $this->wrapperPrefix.$path;
+
+        /*
+         * This looks strange, but at least in PHP 5.3.8 it will raise an E_WARNING if the 4th parameter is null.
+         * fopen() will be called only once with the correct arguments.
+         *
+         * The error suppressing is solely to determ whether the file exists.
+         * file_exists() is not used as not all wrappers support stat() to actually check for existing resources.
+         */
+        if (($this->context and @!fopen($name, 'r', null, $this->context)) || @!fopen($name, 'r')) {
+            throw new NotFoundHttpException('Source image not found.');
+        }
+
+        $image = $this->imagine->load(file_get_contents($name, null, $this->context));
+
+        return $image;
+    }
+}

Resources/config/imagine.xml

@@ -41,6 +41,7 @@
         <!-- Data loaders' classes -->
 
         <parameter key="liip_imagine.data.loader.filesystem.class">Liip\ImagineBundle\Imagine\Data\Loader\FileSystemLoader</parameter>
+        <parameter key="liip_imagine.data.loader.stream.class">Liip\ImagineBundle\Imagine\Data\Loader\StreamLoader</parameter>
 
         <!-- Cache resolvers' classes -->
 
@@ -49,7 +50,7 @@
     </parameters>
 
     <services>
-        
+
         <!-- Utility services -->
 
         <service id="liip_imagine.filter.manager" class="%liip_imagine.filter.manager.class%">
@@ -90,7 +91,7 @@
         </service>
 
         <!-- ImagineInterface instances -->
-        
+
         <service id="liip_imagine" alias="liip_imagine.gd" />
 
         <service id="liip_imagine.gd" class="%liip_imagine.gd.class%" />