//
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// Copyright 2008 Christian Henning, Lubomir Bourdev
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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#ifndef BOOST_GIL_EXTENSION_IO_PNG_DETAIL_IS_ALLOWED_HPP
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#define BOOST_GIL_EXTENSION_IO_PNG_DETAIL_IS_ALLOWED_HPP
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#include <boost/gil/extension/io/png/tags.hpp>
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#include <type_traits>
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namespace boost { namespace gil { namespace detail {
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template< typename View >
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bool is_allowed( const image_read_info< png_tag >& info
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, std::true_type // is read_and_no_convert
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)
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{
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using pixel_t = typename get_pixel_type<View>::type;
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using channel_t = typename channel_traits<typename element_type<pixel_t>::type>::value_type;
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const png_num_channels::type dst_num_channels = num_channels< pixel_t >::value;
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const png_bitdepth::type dst_bit_depth = detail::unsigned_integral_num_bits< channel_t >::value;
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return dst_num_channels == info._num_channels
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&& dst_bit_depth == info._bit_depth;
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}
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template< typename View >
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bool is_allowed( const image_read_info< png_tag >& /* info */
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, std::false_type // is read_and_convert
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)
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{
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return true;
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}
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} // namespace detail
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} // namespace gil
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} // namespace boost
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#endif
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