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//
// Copyright 2008 Christian Henning, Lubomir Bourdev
//
// 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_EXTENSION_IO_PNG_DETAIL_IS_ALLOWED_HPP
#define BOOST_GIL_EXTENSION_IO_PNG_DETAIL_IS_ALLOWED_HPP
#include <boost/gil/extension/io/png/tags.hpp>
#include <type_traits>
namespace boost { namespace gil { namespace detail {
template< typename View >
bool is_allowed( const image_read_info< png_tag >& info
, std::true_type // is read_and_no_convert
)
{
using pixel_t = typename get_pixel_type<View>::type;
using channel_t = typename channel_traits<typename element_type<pixel_t>::type>::value_type;
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 */
, std::false_type // is read_and_convert
)
{
return true;
}
} // namespace detail
} // namespace gil
} // namespace boost
#endif