diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Pdf/Resource/ContentStream.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Pdf/Resource/ContentStream.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,114 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Pdf
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Image.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+
+/** Internally used classes */
+require_once 'Zend/Pdf/Element/Object.php';
+require_once 'Zend/Pdf/Element/Dictionary.php';
+require_once 'Zend/Pdf/Element/Name.php';
+require_once 'Zend/Pdf/Element/Numeric.php';
+
+
+/** Zend_Pdf_Resource */
+require_once 'Zend/Pdf/Resource.php';
+
+
+/**
+ * Content stream (drawing instructions container)
+ *
+ * @package    Zend_Pdf
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Pdf_Resource_ContentStream extends Zend_Pdf_Resource
+{
+    /**
+     * Buffered content
+     *
+     * @var string
+     */
+    protected $_bufferedContent = '';
+
+    /**
+     * Object constructor.
+     *
+     * @param Zend_Pdf_Element_Object_Stream|string $contentStreamObject
+     * @throws Zend_Pdf_Exception
+     */
+    public function __construct($contentStreamObject = '')
+    {
+        if ($contentStreamObject !== null &&
+            !$contentStreamObject instanceof Zend_Pdf_Element_Object_Stream &&
+            !is_string($contentStreamObject)
+        ) {
+            require_once 'Zend/Pdf/Exception.php';
+            throw new Zend_Pdf_Exception('Content stream parameter must be a string or stream object');
+        }
+
+        parent::__construct($contentStreamObject);
+    }
+
+    /**
+     * Appends instructions to the end of the content stream
+     *
+     * @param string $instructions
+     * @return Zend_Pdf_Resource_ContentStream
+     */
+    public function addInstructions($instructions)
+    {
+        $this->_bufferedContent .= $instructions;
+        return $this;
+    }
+
+    /**
+     * Get current stream content
+     *
+     * @return string
+     */
+    public function getInstructions()
+    {
+        $this->flush();
+        return $this->_resource->value;
+    }
+
+    /**
+     * Clear stream content.
+     *
+     * @return Zend_Pdf_Resource_ContentStream
+     */
+    public function clear()
+    {
+        $this->_resource->value = '';
+        $this->_bufferedContent = '';
+        return $this;
+    }
+
+    /**
+     * Flush buffered content
+     */
+    public function flush()
+    {
+        $this->_resource->value .= $this->_bufferedContent;
+        $this->_bufferedContent = '';
+
+        return $this;
+    }
+}