109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
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//
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// Copyright 2005-2007 Adobe Systems Incorporated
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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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#ifdef _MSC_VER
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//#pragma warning(disable : 4244) // conversion from 'gil::image<V,Alloc>::coord_t' to 'int', possible loss of data (visual studio compiler doesn't realize that the two types are the same)
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#pragma warning(disable : 4503) // decorated name length exceeded, name was truncated
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#endif
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#include <boost/gil/extension/dynamic_image/dynamic_image_all.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <ios>
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#include <iostream>
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#include <fstream>
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#include <map>
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#include <string>
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#include <type_traits>
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#include <vector>
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using namespace boost::gil;
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using namespace std;
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using namespace boost;
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///////////////////////////////////////////////////////////////
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std::size_t is_planar_impl( const std::size_t size_in_units
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, const std::size_t channels_in_image
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, std::true_type
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)
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{
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return size_in_units * channels_in_image;
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}
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std::size_t is_planar_impl( const std::size_t size_in_units
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, const std::size_t
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, std::false_type
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)
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{
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return size_in_units;
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}
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template< typename View >
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std::size_t get_row_size_in_memunits( typename View::x_coord_t width)
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{ // number of units per row
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std::size_t size_in_memunits = width * memunit_step( typename View::x_iterator() );
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return size_in_memunits;
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}
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template< typename View
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, bool IsPlanar
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>
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std::size_t total_allocated_size_in_bytes( const typename View::point_t& dimensions )
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{
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using x_iterator = typename View::x_iterator;
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// when value_type is a non-pixel, like int or float, num_channels< ... > doesn't work.
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const std::size_t _channels_in_image = mp11::mp_eval_if< is_pixel< typename View::value_type >
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, num_channels< View >
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, std::integral_constant<int, 1>
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>::type::value;
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std::size_t size_in_units = is_planar_impl( get_row_size_in_memunits< View >( dimensions.x ) * dimensions.y
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, _channels_in_image
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, typename std::conditional< IsPlanar, std::true_type, std::false_type >::type()
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);
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// return the size rounded up to the nearest byte
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std::size_t btm = byte_to_memunit< typename View::x_iterator >::value;
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return ( size_in_units + btm - 1 )
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/ btm;
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}
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void test_recreate_image()
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{
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auto tasib_1 = total_allocated_size_in_bytes<rgb8_view_t, false>({640, 480});
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auto tasib_2 = total_allocated_size_in_bytes<rgb8_view_t, false>({320, 200});
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rgb8_image_t img( 640, 480 );
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img.recreate( 320, 200 );
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}
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int main()
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{
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test_recreate_image();
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return ::boost::report_errors();
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}
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
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#pragma warning(push)
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#pragma warning(disable:4127) //conditional expression is constant
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#endif
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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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