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Diffstat (limited to 'boost/gil/extension/io/targa/detail/write.hpp')
-rw-r--r-- | boost/gil/extension/io/targa/detail/write.hpp | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/boost/gil/extension/io/targa/detail/write.hpp b/boost/gil/extension/io/targa/detail/write.hpp new file mode 100644 index 0000000000..223c1b2161 --- /dev/null +++ b/boost/gil/extension/io/targa/detail/write.hpp @@ -0,0 +1,197 @@ +/* + Copyright 2010-2012 Kenneth Riddile, Christian Henning + Use, modification and distribution are subject to 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_TARGA_DETAIL_WRITE_HPP +#define BOOST_GIL_EXTENSION_IO_TARGA_DETAIL_WRITE_HPP + +//////////////////////////////////////////////////////////////////////////////////////// +/// \file +/// \brief +/// \author Kenneth Riddile, Christian Henning \n +/// +/// \date 2010-2012 \n +/// +//////////////////////////////////////////////////////////////////////////////////////// + +#include <vector> + +#include <boost/gil/io/base.hpp> +#include <boost/gil/io/device.hpp> + +#include <boost/gil/extension/io/targa/tags.hpp> + +#include <boost/gil/extension/io/targa/detail/writer_backend.hpp> + +namespace boost { namespace gil { + +#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) +#pragma warning(push) +#pragma warning(disable:4512) //assignment operator could not be generated +#endif + +namespace detail { + +template < int N > struct get_targa_view_type {}; +template <> struct get_targa_view_type< 3 > { typedef bgr8_view_t type; }; +template <> struct get_targa_view_type< 4 > { typedef bgra8_view_t type; }; + +struct targa_write_is_supported +{ + template< typename View > + struct apply + : public is_write_supported< typename get_pixel_type< View >::type + , targa_tag + > + {}; +}; + +} // detail + +/// +/// TARGA Writer +/// +template< typename Device > +class writer< Device + , targa_tag + > + : public writer_backend< Device + , targa_tag + > +{ +private: + typedef writer_backend< Device, targa_tag > backend_t; + +public: + + writer( const Device& io_dev + , const image_write_info< targa_tag >& info + ) + : backend_t( io_dev + , info + ) + {} + + template<typename View> + void apply( const View& view ) + { + write( view ); + } + +private: + + template< typename View > + void write( const View& view ) + { + uint8_t bit_depth = static_cast<uint8_t>( num_channels<View>::value * 8 ); + + // write the TGA header + this->_io_dev.write_uint8( 0 ); // offset + this->_io_dev.write_uint8( targa_color_map_type::_rgb ); + this->_io_dev.write_uint8( targa_image_type::_rgb ); + this->_io_dev.write_uint16( 0 ); // color map start + this->_io_dev.write_uint16( 0 ); // color map length + this->_io_dev.write_uint8( 0 ); // color map depth + this->_io_dev.write_uint16( 0 ); // x origin + this->_io_dev.write_uint16( 0 ); // y origin + this->_io_dev.write_uint16( static_cast<uint16_t>( view.width() ) ); // width in pixels + this->_io_dev.write_uint16( static_cast<uint16_t>( view.height() ) ); // height in pixels + this->_io_dev.write_uint8( bit_depth ); + + if( 32 == bit_depth ) + { + this->_io_dev.write_uint8( 8 ); // 8-bit alpha channel descriptor + } + else + { + this->_io_dev.write_uint8( 0 ); + } + + write_image< View + , typename detail::get_targa_view_type< num_channels< View >::value >::type + >( view ); + } + + + template< typename View + , typename TGA_View + > + void write_image( const View& view ) + { + size_t row_size = view.width() * num_channels<View>::value; + byte_vector_t buffer( row_size ); + std::fill( buffer.begin(), buffer.end(), 0 ); + + + TGA_View row = interleaved_view( view.width() + , 1 + , reinterpret_cast<typename TGA_View::value_type*>( &buffer.front() ) + , row_size + ); + + for( typename View::y_coord_t y = view.height() - 1; y > -1; --y ) + { + copy_pixels( subimage_view( view + , 0 + , static_cast<int>( y ) + , static_cast<int>( view.width() ) + , 1 + ) + , row + ); + + this->_io_dev.write( &buffer.front(), row_size ); + } + + } +}; + +/// +/// TARGA Dynamic Image Writer +/// +template< typename Device > +class dynamic_image_writer< Device + , targa_tag + > + : public writer< Device + , targa_tag + > +{ + typedef writer< Device + , targa_tag + > parent_t; + +public: + + dynamic_image_writer( const Device& io_dev + , const image_write_info< targa_tag >& info + ) + : parent_t( io_dev + , info + ) + {} + + template< typename Views > + void apply( const any_image_view< Views >& views ) + { + detail::dynamic_io_fnobj< detail::targa_write_is_supported + , parent_t + > op( this ); + + apply_operation( views, op ); + } +}; + +#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) +#pragma warning(pop) +#endif + +} // gil +} // boost + +#endif |