//
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// Copyright 2010 Kenneth Riddile
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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_TARGA_DETAIL_IS_ALLOWED_HPP
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#define BOOST_GIL_EXTENSION_IO_TARGA_DETAIL_IS_ALLOWED_HPP
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#include <boost/gil/extension/io/targa/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< targa_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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targa_depth::type src_bits_per_pixel = 0;
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switch( info._bits_per_pixel )
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{
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case 24:
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case 32:
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{
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src_bits_per_pixel = info._bits_per_pixel;
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break;
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}
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default:
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{
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io_error( "Pixel size not supported." );
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break;
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}
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}
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using channel_t = typename channel_traits<typename element_type<typename View::value_type>::type>::value_type;
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targa_depth::type dst_bits_per_pixel = detail::unsigned_integral_num_bits< channel_t >::value * num_channels< View >::value;
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return ( dst_bits_per_pixel == src_bits_per_pixel );
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}
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template< typename View >
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bool is_allowed( const image_read_info< targa_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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