//
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// Copyright 2008 Christian Henning
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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_PNM_TAGS_HPP
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#define BOOST_GIL_EXTENSION_IO_PNM_TAGS_HPP
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#define BOOST_GIL_EXTENSION_IO_PNM_READ_ENABLED // TODO: Document, explain, review
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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 {
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/// Defines pnm tag.
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struct pnm_tag : format_tag {};
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/// see http://en.wikipedia.org/wiki/Portable_Bitmap_File_Format for reference
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/// Defines type for image type property.
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struct pnm_image_type : property_base< uint32_t >
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{
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using mono_asc_t = std::integral_constant<type, 1>;
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using gray_asc_t = std::integral_constant<type, 2>;
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using color_asc_t = std::integral_constant<type, 3>;
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using mono_bin_t = std::integral_constant<type, 4>;
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using gray_bin_t = std::integral_constant<type, 5>;
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using color_bin_t = std::integral_constant<type, 6>;
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};
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/// Defines type for image width property.
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struct pnm_image_width : property_base< uint32_t > {};
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/// Defines type for image height property.
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struct pnm_image_height : property_base< uint32_t > {};
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/// Defines type for image max value property.
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struct pnm_image_max_value : property_base< uint32_t > {};
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/// Read information for pnm images.
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///
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/// The structure is returned when using read_image_info.
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template<>
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struct image_read_info< pnm_tag >
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{
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/// The image type.
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pnm_image_type::type _type;
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/// The image width.
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pnm_image_width::type _width;
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/// The image height.
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pnm_image_height::type _height;
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/// The image max value.
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pnm_image_max_value::type _max_value;
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};
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/// Read settings for pnm images.
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///
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/// The structure can be used for all read_xxx functions, except read_image_info.
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template<>
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struct image_read_settings< pnm_tag > : public image_read_settings_base
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{
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/// Default constructor
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image_read_settings< pnm_tag >()
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: image_read_settings_base()
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{}
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/// Constructor
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/// \param top_left Top left coordinate for reading partial image.
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/// \param dim Dimensions for reading partial image.
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image_read_settings( const point_t& top_left
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, const point_t& dim
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)
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: image_read_settings_base( top_left
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, dim
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)
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{}
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};
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/// Write information for pnm images.
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///
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/// The structure can be used for write_view() function.
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template<>
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struct image_write_info< pnm_tag >
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{
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};
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} // namespace gil
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} // namespace boost
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#endif
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