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/*
Copyright 2007-2008 Christian Henning, Andreas Pokorny, Lubomir Bourdev
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_JPEG_DETAIL_SUPPORTED_TYPES_HPP
#define BOOST_GIL_EXTENSION_IO_JPEG_DETAIL_SUPPORTED_TYPES_HPP
////////////////////////////////////////////////////////////////////////////////////////
/// \file
/// \brief
/// \author Christian Henning, Andreas Pokorny, Lubomir Bourdev \n
///
/// \date 2007-2008 \n
///
////////////////////////////////////////////////////////////////////////////////////////
#include <boost/mpl/not.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/gil/channel.hpp>
#include <boost/gil/color_base.hpp>
namespace boost { namespace gil { namespace detail {
// Read support
template< jpeg_color_space::type ColorSpace >
struct jpeg_rw_support_base
{
static const jpeg_color_space::type _color_space = ColorSpace;
};
template< typename Channel
, typename ColorSpace
>
struct jpeg_read_support : read_support_false
, jpeg_rw_support_base< JCS_UNKNOWN > {};
template<>
struct jpeg_read_support<uint8_t
, rgb_t
> : read_support_true
, jpeg_rw_support_base< JCS_RGB > {};
template<>
struct jpeg_read_support<uint8_t
, cmyk_t
> : read_support_true
, jpeg_rw_support_base< JCS_CMYK > {};
template<>
struct jpeg_read_support<uint8_t
, gray_t
> : read_support_true
, jpeg_rw_support_base< JCS_GRAYSCALE > {};
// Write support
template< typename Channel
, typename ColorSpace
>
struct jpeg_write_support : write_support_false
, jpeg_rw_support_base< JCS_UNKNOWN > {};
template<>
struct jpeg_write_support<uint8_t
, gray_t
> : write_support_true
, jpeg_rw_support_base< JCS_GRAYSCALE > {};
template<>
struct jpeg_write_support<uint8_t
, rgb_t
> : write_support_true
, jpeg_rw_support_base< JCS_RGB > {};
template<>
struct jpeg_write_support<uint8_t
, cmyk_t
> : write_support_true
, jpeg_rw_support_base< JCS_CMYK > {};
} // namespace detail
template< typename Pixel >
struct is_read_supported< Pixel
, jpeg_tag
>
: mpl::bool_< detail::jpeg_read_support< typename channel_type< Pixel >::type
, typename color_space_type< Pixel >::type
>::is_supported
>
{
typedef detail::jpeg_read_support< typename channel_type< Pixel >::type
, typename color_space_type< Pixel >::type
> parent_t;
static const typename jpeg_color_space::type _color_space = parent_t::_color_space;
};
template< typename Pixel >
struct is_write_supported< Pixel
, jpeg_tag
>
: mpl::bool_< detail::jpeg_write_support< typename channel_type< Pixel >::type
, typename color_space_type< Pixel >::type
>::is_supported
>
{};
} // namespace gil
} // namespace boost
#endif
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