//
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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_SUPPORTED_TYPES_HPP
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#define BOOST_GIL_EXTENSION_IO_TARGA_DETAIL_SUPPORTED_TYPES_HPP
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#include <boost/gil/extension/io/targa/tags.hpp>
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#include <boost/gil/channel.hpp>
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#include <boost/gil/color_base.hpp>
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#include <boost/gil/io/base.hpp>
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#include <type_traits>
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namespace boost { namespace gil { namespace detail {
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// Read support
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template< typename Channel
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, typename ColorSpace
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>
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struct targa_read_support : read_support_false
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{
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static const targa_depth::type bpp = 0;
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};
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template<>
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struct targa_read_support<uint8_t
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, rgb_t
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> : read_support_true
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{
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static const targa_depth::type bpp = 24;
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};
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template<>
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struct targa_read_support<uint8_t
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, rgba_t
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> : read_support_true
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{
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static const targa_depth::type bpp = 32;
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};
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// Write support
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template< typename Channel
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, typename ColorSpace
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>
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struct targa_write_support : write_support_false
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{};
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template<>
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struct targa_write_support<uint8_t
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, rgb_t
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> : write_support_true {};
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template<>
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struct targa_write_support<uint8_t
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, rgba_t
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> : write_support_true {};
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} // namespace detail
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template<typename Pixel>
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struct is_read_supported<Pixel, targa_tag>
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: std::integral_constant
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<
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bool,
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detail::targa_read_support
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<
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typename channel_type<Pixel>::type,
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typename color_space_type<Pixel>::type
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>::is_supported
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>
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{
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using parent_t = detail::targa_read_support
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<
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typename channel_type<Pixel>::type,
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typename color_space_type<Pixel>::type
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>;
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static const typename targa_depth::type bpp = parent_t::bpp;
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};
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template<typename Pixel>
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struct is_write_supported<Pixel, targa_tag>
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: std::integral_constant
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<
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bool,
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detail::targa_write_support
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<
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typename channel_type<Pixel>::type,
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typename color_space_type<Pixel>::type
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>::is_supported
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>
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{};
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}} // namespace boost::gil
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#endif
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