boost/gil/io/read_view.hpp
// // Copyright 2007-2012 Christian Henning, Andreas Pokorny, Lubomir Bourdev // // 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_IO_READ_VIEW_HPP #define BOOST_GIL_IO_READ_VIEW_HPP #include <boost/gil/io/base.hpp> #include <boost/gil/io/conversion_policies.hpp> #include <boost/gil/io/device.hpp> #include <boost/gil/io/get_reader.hpp> #include <boost/gil/io/path_spec.hpp> #include <boost/type_traits/is_base_and_derived.hpp> #include <boost/mpl/and.hpp> #include <boost/utility/enable_if.hpp> namespace boost{ namespace gil { /// \ingroup IO /// \brief Reads an image view without conversion. No memory is allocated. /// \param reader An image reader. /// \param view The image view in which the data is read into. /// \param settings Specifies read settings depending on the image format. /// \throw std::ios_base::failure template < typename Reader , typename View > inline void read_view( Reader reader , const View& view , typename enable_if< typename mpl::and_< detail::is_reader< Reader > , typename is_format_tag< typename Reader::format_tag_t >::type , typename is_read_supported< typename get_pixel_type< View >::type , typename Reader::format_tag_t >::type >::type >::type* /* ptr */ = 0 ) { reader.check_image_size( view.dimensions() ); reader.init_view( view , reader._settings ); reader.apply( view ); } /// \brief Reads an image view without conversion. No memory is allocated. /// \param file It's a device. Must satisfy is_input_device metafunction. /// \param view The image view in which the data is read into. /// \param settings Specifies read settings depending on the image format. /// \throw std::ios_base::failure template < typename Device , typename View , typename FormatTag > inline void read_view( Device& file , const View& view , const image_read_settings< FormatTag >& settings , typename enable_if< typename mpl::and_< detail::is_read_device< FormatTag , Device > , typename is_format_tag< FormatTag >::type , typename is_read_supported< typename get_pixel_type< View >::type , FormatTag >::type >::type >::type* /* ptr */ = 0 ) { typedef typename get_reader< Device , FormatTag , detail::read_and_no_convert >::type reader_t; reader_t reader = make_reader( file , settings , detail::read_and_no_convert() ); read_view( reader , view ); } /// \brief Reads an image view without conversion. No memory is allocated. /// \param file It's a device. Must satisfy is_input_device metafunction or is_adaptable_input_device. /// \param view The image view in which the data is read into. /// \param tag Defines the image format. Must satisfy is_format_tag metafunction. /// \throw std::ios_base::failure template< typename Device , typename View , typename FormatTag > inline void read_view( Device& file , const View& view , const FormatTag& tag , typename enable_if< typename mpl::and_< typename is_format_tag< FormatTag >::type , detail::is_read_device< FormatTag , Device > , typename is_read_supported< typename get_pixel_type< View >::type , FormatTag >::type >::type >::type* /* ptr */ = 0 ) { typedef typename get_reader< Device , FormatTag , detail::read_and_no_convert >::type reader_t; reader_t reader = make_reader( file , tag , detail::read_and_no_convert() ); read_view( reader , view ); } /// \brief Reads an image view without conversion. No memory is allocated. /// \param file_name File name. Must satisfy is_supported_path_spec metafunction. /// \param view The image view in which the data is read into. /// \param settings Specifies read settings depending on the image format. /// \throw std::ios_base::failure template < typename String , typename View , typename FormatTag > inline void read_view( const String& file_name , const View& view , const image_read_settings< FormatTag >& settings , typename enable_if< typename mpl::and_< typename detail::is_supported_path_spec< String >::type , typename is_format_tag< FormatTag >::type , typename is_read_supported< typename get_pixel_type< View >::type , FormatTag >::type >::type >::type* /* ptr */ = 0 ) { typedef typename get_reader< String , FormatTag , detail::read_and_no_convert >::type reader_t; reader_t reader = make_reader( file_name , settings , detail::read_and_no_convert() ); read_view( reader , view ); } /// \brief Reads an image view without conversion. No memory is allocated. /// \param file_name File name. Must satisfy is_supported_path_spec metafunction. /// \param view The image view in which the data is read into. /// \param tag Defines the image format. Must satisfy is_format_tag metafunction. /// \throw std::ios_base::failure template < typename String , typename View , typename FormatTag > inline void read_view( const String& file_name , const View& view , const FormatTag& tag , typename enable_if< typename mpl::and_< typename detail::is_supported_path_spec< String >::type , typename is_format_tag< FormatTag >::type , typename is_read_supported< typename get_pixel_type< View >::type , FormatTag >::type >::type >::type* /* ptr */ = 0 ) { typedef typename get_reader< String , FormatTag , detail::read_and_no_convert >::type reader_t; reader_t reader = make_reader( file_name , tag , detail::read_and_no_convert() ); read_view( reader , view ); } } // namespace gil } // namespace boost #endif