libs/gil/test/legacy/recreate_image.cpp

   1 //
   2 // Copyright 2005-2007 Adobe Systems Incorporated
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 #ifdef _MSC_VER
   9 //#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)
  10 #pragma warning(disable : 4503)     // decorated name length exceeded, name was truncated
  11 #endif
  12
  13 #include <boost/gil/extension/dynamic_image/dynamic_image_all.hpp>
  14
  15 #include <boost/test/unit_test.hpp>
  16
  17 #include <ios>
  18 #include <iostream>
  19 #include <fstream>
  20 #include <map>
  21 #include <string>
  22 #include <type_traits>
  23 #include <vector>
  24
  25 using namespace boost::gil;
  26 using namespace std;
  27 using namespace boost;
  28
  29 ///////////////////////////////////////////////////////////////
  30
  31 std::size_t is_planar_impl( const std::size_t size_in_units
  32                             , const std::size_t channels_in_image
  33                             , std::true_type
  34                             )
  35 {
  36     return size_in_units * channels_in_image;
  37 }
  38
  39 std::size_t is_planar_impl( const std::size_t size_in_units
  40                           , const std::size_t
  41                           , std::false_type
  42                           )
  43 {
  44     return size_in_units;
  45 }
  46
  47 template< typename View >
  48 std::size_t get_row_size_in_memunits( typename View::x_coord_t width)
  49 {   // number of units per row
  50     std::size_t size_in_memunits = width * memunit_step( typename View::x_iterator() );
  51
  52     return size_in_memunits;
  53 }
  54
  55
  56 template< typename View
  57         , bool IsPlanar
  58         >
  59 std::size_t total_allocated_size_in_bytes( const typename View::point_t& dimensions )
  60 {
  61
  62     using x_iterator = typename View::x_iterator;
  63
  64     // when value_type is a non-pixel, like int or float, num_channels< ... > doesn't work.
  65     const std::size_t _channels_in_image = mp11::mp_eval_if< is_pixel< typename View::value_type >
  66                                                         , num_channels< View >
  67                                                         , std::integral_constant<int, 1>
  68                                                         >::type::value;
  69
  70     std::size_t size_in_units = is_planar_impl( get_row_size_in_memunits< View >( dimensions.x ) * dimensions.y
  71                                                 , _channels_in_image
  72                                                 , typename std::conditional< IsPlanar, std::true_type, std::false_type >::type()
  73                                                 );
  74
  75     // return the size rounded up to the nearest byte
  76     std::size_t btm = byte_to_memunit< typename View::x_iterator >::value;
  77
  78
  79     return ( size_in_units + btm - 1 )
  80            / btm;
  81 }
  82
  83
  84 BOOST_AUTO_TEST_SUITE(GIL_Tests)
  85
  86 BOOST_AUTO_TEST_CASE(recreate_image_test)
  87 {
  88     auto tasib_1 = total_allocated_size_in_bytes<rgb8_view_t, false>({640, 480});
  89     auto tasib_2 = total_allocated_size_in_bytes<rgb8_view_t, false>({320, 200});
  90
  91     rgb8_image_t img( 640, 480 );
  92     img.recreate( 320, 200 );
  93
  94 }
  95
  96 BOOST_AUTO_TEST_SUITE_END()
  97
  98 #if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
  99 #pragma warning(push)
 100 #pragma warning(disable:4127) //conditional expression is constant
 101 #endif
 102
 103 #if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
 104 #pragma warning(pop)
 105 #endif