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diff --git a/boost/gil/extension/io/raw/detail/reader_backend.hpp b/boost/gil/extension/io/raw/detail/reader_backend.hpp
new file mode 100644
index 0000000000..ad03a946f7
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+++ b/boost/gil/extension/io/raw/detail/reader_backend.hpp
@@ -0,0 +1,151 @@
+/*
+    Copyright 2012 Christian Henning
+    Use, modification and distribution are subject to the Boost Software License,
+    Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+    http://www.boost.org/LICENSE_1_0.txt).
+*/
+
+/*************************************************************************************************/
+
+#ifndef BOOST_GIL_EXTENSION_IO_RAW_DETAIL_READER_BACKEND_HPP
+#define BOOST_GIL_EXTENSION_IO_RAW_DETAIL_READER_BACKEND_HPP
+
+////////////////////////////////////////////////////////////////////////////////////////
+/// \file
+/// \brief
+/// \author Christian Henning \n
+///
+/// \date 2012 \n
+///
+////////////////////////////////////////////////////////////////////////////////////////
+
+#include <boost/gil/extension/io/raw/tags.hpp>
+
+namespace boost { namespace gil {
+
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) 
+#pragma warning(push) 
+#pragma warning(disable:4512) //assignment operator could not be generated 
+#endif
+
+///
+/// RAW Backend
+///
+template< typename Device >
+struct reader_backend< Device
+                     , raw_tag
+                     >
+{
+public:
+
+    typedef raw_tag format_tag_t;
+
+public:
+
+    reader_backend( const Device&                         io_dev
+                  , const image_read_settings< raw_tag >& settings
+                  )
+    : _io_dev  ( io_dev   )
+    , _settings( settings )
+    , _info()
+    , _scanline_length( 0 )
+    {
+        read_header();    
+
+        if( _settings._dim.x == 0 )
+        {
+            _settings._dim.x = _info._width;
+        }
+
+        if( _settings._dim.y == 0 )
+        {
+            _settings._dim.y = _info._height;
+        }
+    }
+
+    void read_header()
+    {
+        _io_dev.get_mem_image_format( &_info._width
+                                    , &_info._height
+                                    , &_info._samples_per_pixel
+                                    , &_info._bits_per_pixel
+                                    );
+
+        // iparams
+        _info._camera_manufacturer = _io_dev.get_camera_manufacturer();
+        _info._camera_model        = _io_dev.get_camera_model();
+        _info._raw_images_count    = _io_dev.get_raw_count();
+        _info._dng_version         = _io_dev.get_dng_version();
+        _info._number_colors       = _io_dev.get_colors();
+        //_io_dev.get_filters();
+        _info._colors_description  = _io_dev.get_cdesc();
+
+        // image_sizes
+        _info._raw_width      = _io_dev.get_raw_width();
+        _info._raw_height     = _io_dev.get_raw_height();
+        _info._visible_width  = _io_dev.get_image_width();
+        _info._visible_height = _io_dev.get_image_height();
+        _info._top_margin     = _io_dev.get_top_margin();
+        _info._left_margin    = _io_dev.get_left_margin();
+        _info._output_width   = _io_dev.get_iwidth();
+        _info._output_height  = _io_dev.get_iheight();
+        _info._pixel_aspect   = _io_dev.get_pixel_aspect();
+        _info._flip           = _io_dev.get_flip();
+
+        // imgother
+        _info._iso_speed         = _io_dev.get_iso_speed();
+        _info._shutter           = _io_dev.get_shutter();
+        _info._aperture          = _io_dev.get_aperture();
+        _info._focal_length      = _io_dev.get_focal_len();
+        _info._timestamp         = _io_dev.get_timestamp();
+        _info._shot_order        = static_cast< uint16_t >( _io_dev.get_shot_order() );
+        //_io_dev.get_gpsdata();
+        _info._image_description = _io_dev.get_desc();
+        _info._artist            = _io_dev.get_artist();
+
+        _info._libraw_version = _io_dev.get_version();
+
+        _info._valid = true;
+    }
+
+    /// Check if image is large enough.
+    void check_image_size( const point_t& img_dim )
+    {
+        if( _settings._dim.x > 0 )
+        {
+            if( img_dim.x < _settings._dim.x ) { io_error( "Supplied image is too small" ); }
+        }
+        else
+        {
+            if( img_dim.x < _info._width ) { io_error( "Supplied image is too small" ); }
+        }
+
+
+        if( _settings._dim.y > 0 )
+        {
+            if( img_dim.y < _settings._dim.y ) { io_error( "Supplied image is too small" ); }
+        }
+        else
+        {
+            if( img_dim.y < _info._height ) { io_error( "Supplied image is too small" ); }
+        }
+    }
+
+public:
+
+    Device _io_dev;
+
+    image_read_settings< raw_tag > _settings;
+    image_read_info< raw_tag >     _info;
+
+    std::size_t _scanline_length;
+};
+
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) 
+#pragma warning(pop) 
+#endif 
+
+} // namespace gil
+} // namespace boost
+
+#endif