WIP. Scale cover art option. Seems to work
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emeric
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/*
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Copyright 2007-2008 Christian Henning, Andreas Pokorny, Lubomir Bourdev
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Use, modification and distribution are subject to the Boost Software License,
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Version 1.0. (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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/*************************************************************************************************/
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#ifndef BOOST_GIL_EXTENSION_IO_IMAGE_READ_INFO_HPP
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#define BOOST_GIL_EXTENSION_IO_IMAGE_READ_INFO_HPP
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////////////////////////////////////////////////////////////////////////////////////////
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/// \file
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/// \brief
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/// \author Christian Henning, Andreas Pokorny, Lubomir Bourdev \n
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///
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/// \date 2007-2008 \n
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///
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////////////////////////////////////////////////////////////////////////////////////////
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#include <boost/type_traits/is_base_and_derived.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/utility/enable_if.hpp>
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#include "base.hpp"
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#include "io_device.hpp"
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#include "path_spec.hpp"
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namespace boost{ namespace gil {
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/// \ingroup IO
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/// \brief Returns the image info. Image info is file format specific.
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/// \param file It's a device. Must satisfy is_input_device metafunction.
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/// \param settings Specifies read settings depending on the image format.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template< typename Device
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, typename FormatTag
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>
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inline
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image_read_info< FormatTag >
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read_image_info( Device& file
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, const image_read_settings< FormatTag >& settings
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, typename enable_if< mpl::and_< is_format_tag< FormatTag >
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, detail::is_input_device< Device >
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>
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>::type* /* ptr */ = 0
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)
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{
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return detail::reader< Device
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, FormatTag
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, detail::read_and_no_convert
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>( file
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, settings
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).get_info();
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}
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/// \brief Returns the image info. Image info is file format specific.
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/// \param file It's a device. Must satisfy is_input_device metafunction.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template< typename Device
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, typename FormatTag
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>
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inline
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image_read_info< FormatTag >
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read_image_info( Device& file
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, const FormatTag&
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, typename enable_if< mpl::and_< is_format_tag< FormatTag >
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, detail::is_input_device< Device >
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>
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>::type* /* ptr */ = 0
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)
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{
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return read_image_info( file
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, image_read_settings< FormatTag >()
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);
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}
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/// \brief Returns the image info. Image info is file format specific.
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/// \param file It's a device. Must satisfy is_adaptable_input_device metafunction.
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/// \param settings Specifies read settings depending on the image format.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template< typename Device
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, typename FormatTag
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>
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inline
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image_read_info<FormatTag>
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read_image_info( Device& file
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, const image_read_settings< FormatTag >& settings
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, typename enable_if< mpl::and_< is_format_tag< FormatTag >
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, detail::is_adaptable_input_device< FormatTag
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, Device
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>
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>
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>::type* /* ptr */ = 0
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)
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{
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typedef typename detail::is_adaptable_input_device< FormatTag
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, Device
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>::device_type device_type;
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device_type dev( file );
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return detail::reader< device_type
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, FormatTag
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, detail::read_and_no_convert
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>( dev
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, settings
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).get_info();
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}
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/// \brief Returns the image info. Image info is file format specific.
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/// \param file It's a device. Must satisfy is_adaptable_input_device metafunction.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template< typename Device
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, typename FormatTag
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>
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inline
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image_read_info< FormatTag >
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read_image_info( Device& file
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, const FormatTag&
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, typename enable_if< mpl::and_< is_format_tag< FormatTag >
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, detail::is_adaptable_input_device< FormatTag
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, Device
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>
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>
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>::type* /* ptr */ = 0
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)
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{
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typedef typename detail::is_adaptable_input_device< FormatTag
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, Device
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>::device_type device_type;
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device_type dev( file );
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return read_image_info( dev
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, image_read_settings< FormatTag >()
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);
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}
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/// \brief Returns the image info. Image info is file format specific.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param settings Specifies read settings depending on the image format.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template< typename String
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, typename FormatTag
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>
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inline
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image_read_info< FormatTag >
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read_image_info( const String& file_name
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, const image_read_settings< FormatTag >& settings
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, typename enable_if< mpl::and_< is_format_tag< FormatTag >
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, detail::is_supported_path_spec< String >
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>
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>::type* /* ptr */ = 0
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)
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{
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detail::file_stream_device< FormatTag > reader( detail::convert_to_string( file_name )
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, typename detail::file_stream_device< FormatTag >::read_tag()
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);
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return read_image_info( reader
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, settings
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);
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}
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/// \brief Returns the image info. Image info is file format specific.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template< typename String
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, typename FormatTag
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>
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inline
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image_read_info< FormatTag >
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read_image_info( const String& file_name
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, const FormatTag&
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, typename enable_if< mpl::and_< is_format_tag< FormatTag >
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, detail::is_supported_path_spec< String >
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>
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>::type* /* ptr */ = 0
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)
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{
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detail::file_stream_device< FormatTag > reader( detail::convert_to_string( file_name )
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, typename detail::file_stream_device< FormatTag >::read_tag()
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);
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return read_image_info( reader
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, image_read_settings< FormatTag >()
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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 // BOOST_GIL_EXTENSION_IO_IMAGE_READ_INFO_HPP
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