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//
// Copyright 2012 Christian Henning
//
// Distributed under 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_IO_GET_READER_HPP
#define BOOST_GIL_IO_GET_READER_HPP
#include <boost/gil/io/get_read_device.hpp>
namespace boost { namespace gil {
/// \brief Helper metafunction to generate image reader type.
template< typename T
, typename FormatTag
, typename ConversionPolicy
, class Enable = void
>
struct get_reader
{};
template< typename String
, typename FormatTag
, typename ConversionPolicy
>
struct get_reader< String
, FormatTag
, ConversionPolicy
, typename enable_if< mpl::and_< detail::is_supported_path_spec< String >
, is_format_tag< FormatTag >
>
>::type
>
{
typedef typename get_read_device< String
, FormatTag
>::type device_t;
typedef reader< device_t
, FormatTag
, ConversionPolicy
> type;
};
template< typename Device
, typename FormatTag
, typename ConversionPolicy
>
struct get_reader< Device
, FormatTag
, ConversionPolicy
, typename enable_if< mpl::and_< detail::is_adaptable_input_device< FormatTag
, Device
>
, is_format_tag< FormatTag >
>
>::type
>
{
typedef typename get_read_device< Device
, FormatTag
>::type device_t;
typedef reader< device_t
, FormatTag
, ConversionPolicy
> type;
};
/// \brief Helper metafunction to generate dynamic image reader type.
template< typename T
, typename FormatTag
, class Enable = void
>
struct get_dynamic_image_reader
{};
template< typename String
, typename FormatTag
>
struct get_dynamic_image_reader< String
, FormatTag
, typename enable_if< mpl::and_< detail::is_supported_path_spec< String >
, is_format_tag< FormatTag >
>
>::type
>
{
typedef typename get_read_device< String
, FormatTag
>::type device_t;
typedef dynamic_image_reader< device_t
, FormatTag
> type;
};
template< typename Device
, typename FormatTag
>
struct get_dynamic_image_reader< Device
, FormatTag
, typename enable_if< mpl::and_< detail::is_adaptable_input_device< FormatTag
, Device
>
, is_format_tag< FormatTag >
>
>::type
>
{
typedef typename get_read_device< Device
, FormatTag
>::type device_t;
typedef dynamic_image_reader< device_t
, FormatTag
> type;
};
/////////////////////////////////////////////////////////////
/// \brief Helper metafunction to generate image backend type.
template< typename T
, typename FormatTag
, class Enable = void
>
struct get_reader_backend
{};
template< typename String
, typename FormatTag
>
struct get_reader_backend< String
, FormatTag
, typename enable_if< mpl::and_< detail::is_supported_path_spec< String >
, is_format_tag< FormatTag >
>
>::type
>
{
typedef typename get_read_device< String
, FormatTag
>::type device_t;
typedef reader_backend< device_t
, FormatTag
> type;
};
template< typename Device
, typename FormatTag
>
struct get_reader_backend< Device
, FormatTag
, typename enable_if< mpl::and_< detail::is_adaptable_input_device< FormatTag
, Device
>
, is_format_tag< FormatTag >
>
>::type
>
{
typedef typename get_read_device< Device
, FormatTag
>::type device_t;
typedef reader_backend< device_t
, FormatTag
> type;
};
/// \brief Helper metafunction to generate image scanline_reader type.
template< typename T
, typename FormatTag
>
struct get_scanline_reader
{
typedef typename get_read_device< T
, FormatTag
>::type device_t;
typedef scanline_reader< device_t
, FormatTag
> type;
};
} // namespace gil
} // namespace boost
#endif
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