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/core/lightweight_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
25using namespace boost::gil;
26using namespace std;
27using namespace boost;
28
29///////////////////////////////////////////////////////////////
30
31std::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
39std::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
47template< typename View >
48std::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
56template< typename View
57 , bool IsPlanar
58 >
59std::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
84void test_recreate_image()
85{
86 auto tasib_1 = total_allocated_size_in_bytes<rgb8_view_t, false>(dimensions: {640, 480});
87 auto tasib_2 = total_allocated_size_in_bytes<rgb8_view_t, false>(dimensions: {320, 200});
88
89 rgb8_image_t img( 640, 480 );
90 img.recreate( width: 320, height: 200 );
91}
92
93int main()
94{
95 test_recreate_image();
96
97 return ::boost::report_errors();
98}
99
100
101#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
102#pragma warning(push)
103#pragma warning(disable:4127) //conditional expression is constant
104#endif
105
106#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
107#pragma warning(pop)
108#endif
109

source code of boost/libs/gil/test/legacy/recreate_image.cpp