//
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// Copyright 2012 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_TIFF_DETAIL_WRITER_BACKEND_HPP
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#define BOOST_GIL_EXTENSION_IO_TIFF_DETAIL_WRITER_BACKEND_HPP
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#include <boost/gil/extension/io/tiff/tags.hpp>
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#include <boost/gil/extension/io/tiff/detail/device.hpp>
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#include <boost/gil/detail/mp11.hpp>
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namespace boost { namespace gil {
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
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#pragma warning(push)
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#pragma warning(disable:4512) //assignment operator could not be generated
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#endif
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///
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/// TIFF Writer Backend
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///
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template< typename Device >
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struct writer_backend< Device
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, tiff_tag
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>
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{
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public:
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using format_tag_t = tiff_tag;
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public:
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writer_backend( const Device& io_dev
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, const image_write_info< tiff_tag >& info
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)
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: _io_dev( io_dev )
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, _info( info )
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{}
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protected:
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template< typename View >
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void write_header( const View& view )
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{
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using pixel_t = typename View::value_type;
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// get the type of the first channel (heterogeneous pixels might be broken for now!)
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using channel_t = typename channel_traits<typename element_type<pixel_t>::type>::value_type;
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using color_space_t = typename color_space_type<View>::type;
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if(! this->_info._photometric_interpretation_user_defined )
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{
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// write photometric interpretion - Warning: This value is rather
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// subjective. The user should better set this value itself. There
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// is no way to decide if a image is PHOTOMETRIC_MINISWHITE or
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// PHOTOMETRIC_MINISBLACK. If the user has not manually set it, then
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// this writer will assume PHOTOMETRIC_MINISBLACK for gray_t images,
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// PHOTOMETRIC_RGB for rgb_t images, and PHOTOMETRIC_SEPARATED (as
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// is conventional) for cmyk_t images.
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this->_info._photometric_interpretation = detail::photometric_interpretation< color_space_t >::value;
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}
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// write dimensions
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tiff_image_width::type width = (tiff_image_width::type) view.width();
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tiff_image_height::type height = (tiff_image_height::type) view.height();
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this->_io_dev.template set_property< tiff_image_width >( width );
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this->_io_dev.template set_property< tiff_image_height >( height );
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// write planar configuration
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this->_io_dev.template set_property<tiff_planar_configuration>( this->_info._planar_configuration );
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// write samples per pixel
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tiff_samples_per_pixel::type samples_per_pixel = num_channels< pixel_t >::value;
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this->_io_dev.template set_property<tiff_samples_per_pixel>( samples_per_pixel );
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if /*constexpr*/ (mp11::mp_contains<color_space_t, alpha_t>::value)
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{
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std:: vector <uint16_t> extra_samples {EXTRASAMPLE_ASSOCALPHA};
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this->_io_dev.template set_property<tiff_extra_samples>( extra_samples );
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}
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// write bits per sample
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// @todo: Settings this value usually requires to write for each sample the bit
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// value seperately in case they are different, like rgb556.
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tiff_bits_per_sample::type bits_per_sample = detail::unsigned_integral_num_bits< channel_t >::value;
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this->_io_dev.template set_property<tiff_bits_per_sample>( bits_per_sample );
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// write sample format
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tiff_sample_format::type sampl_format = detail::sample_format< channel_t >::value;
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this->_io_dev.template set_property<tiff_sample_format>( sampl_format );
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// write photometric format
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this->_io_dev.template set_property<tiff_photometric_interpretation>( this->_info._photometric_interpretation );
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// write compression
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this->_io_dev.template set_property<tiff_compression>( this->_info._compression );
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// write orientation
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this->_io_dev.template set_property<tiff_orientation>( this->_info._orientation );
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// write rows per strip
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this->_io_dev.template set_property<tiff_rows_per_strip>( this->_io_dev.get_default_strip_size() );
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// write x, y resolution and units
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this->_io_dev.template set_property<tiff_resolution_unit>( this->_info._resolution_unit );
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this->_io_dev.template set_property<tiff_x_resolution>( this->_info._x_resolution );
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this->_io_dev.template set_property<tiff_y_resolution>( this->_info._y_resolution );
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/// Optional and / or non-baseline tags below here
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// write ICC colour profile, if it's there
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// http://www.color.org/icc_specs2.xalter
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if ( 0 != this->_info._icc_profile.size())
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this->_io_dev.template set_property<tiff_icc_profile>( this->_info._icc_profile );
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}
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public:
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Device _io_dev;
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image_write_info< tiff_tag > _info;
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};
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
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#pragma warning(pop)
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#endif
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} // namespace gil
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} // namespace boost
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#endif
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