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/*
Copyright 2008 Christian Henning, 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_PNG_DETAIL_IS_ALLOWED_HPP
#define BOOST_GIL_EXTENSION_IO_PNG_DETAIL_IS_ALLOWED_HPP
////////////////////////////////////////////////////////////////////////////////////////
/// \file
/// \brief
/// \author Christian Henning \n
///
/// \date 2008 \n
///
////////////////////////////////////////////////////////////////////////////////////////
#include <boost/mpl/for_each.hpp>
namespace boost { namespace gil { namespace detail {
template< typename View >
bool is_allowed( const image_read_info< png_tag >& info
, mpl::true_ // is read_and_no_convert
)
{
typedef typename get_pixel_type< View >::type pixel_t;
typedef typename channel_traits<
typename element_type< pixel_t >::type >::value_type channel_t;
const png_num_channels::type dst_num_channels = num_channels< pixel_t >::value;
const png_bitdepth::type dst_bit_depth = detail::unsigned_integral_num_bits< channel_t >::value;
return dst_num_channels == info._num_channels
&& dst_bit_depth == info._bit_depth;
}
template< typename View >
bool is_allowed( const image_read_info< png_tag >& /* info */
, mpl::false_ // is read_and_convert
)
{
return true;
}
} // namespace detail
} // namespace gil
} // namespace boost
#endif
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