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