Generic Image Library: reader_base.hpp Source File

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reader_base.hpp
1//
2// Copyright 2007-2008 Christian Henning
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#ifndef BOOST_GIL_IO_READER_BASE_HPP
9#define BOOST_GIL_IO_READER_BASE_HPP
10
11#include <boost/gil/io/base.hpp>
12
13#include <boost/assert.hpp>
14
15namespace boost { namespace gil {
16
25template< typename FormatTag
26 , typename ConversionPolicy
27 >
28 struct reader_base
29{
30public:
31
35 reader_base()
36 :_cc_policy()
37 {}
38
42 reader_base( const ConversionPolicy& cc )
43 :_cc_policy( cc )
44 {}
45
52 template< typename Image >
53 void init_image( Image& img
54 , const image_read_settings< FormatTag >& settings
55 )
56 {
57 //setup( backend._settings._dim );
58
59 BOOST_ASSERT(settings._dim.x && settings._dim.y);
60
61 img.recreate( settings._dim.x
62 , settings._dim.y
63 );
64 }
65
66 template< typename View >
67 void init_view( const View& view
68 , const image_read_settings< FormatTag >&
69 )
70 {
71 setup( view.dimensions() );
72 }
73
74private:
75
76 void setup( point_t const& /* dim */ )
77 {
78 //check_coordinates( dim );
79
80 //if( dim == point_t( 0, 0 ))
81 //{
82 // _settings._dim.x = _info._width;
83 // _settings._dim.y = _info._height;
84 //}
85 //else
86 //{
87 // _settings._dim = dim;
88 //}
89 }
90
91 void check_coordinates( point_t const& /* dim */ )
92 {
93 //using int_t = point_t::value_type;
94
95 //int_t width = static_cast< int_t >( _info._width );
96 //int_t height = static_cast< int_t >( _info._height );
97
98 //io_error_if( ( _settings._top_left.x < 0
99 // || _settings._top_left.y < 0
100 // || dim.x < 0
101 // || dim.y < 0
102 // )
103 // , "User provided view has incorrect size." );
104
105
106 //io_error_if( ( ( width ) < _settings._top_left.x
107 // && ( width ) <= dim.x
108 // && ( height ) < _settings._top_left.y
109 // && ( height ) <= dim.y )
110 // , "User provided view has incorrect size." );
111
112 //io_error_if( ( ( _settings._top_left.x + dim.x ) > width
113 // || ( _settings._top_left.y + dim.y ) > height
114 // )
115 // , "User provided view has incorrect size." );
116 }
117
118protected:
119
120 ConversionPolicy _cc_policy;
121};
122
123} // namespace gil
124} // namespace boost
125
126#endif
boost::gil::view
auto view(image< Pixel, IsPlanar, Alloc > &img) -> typename image< Pixel, IsPlanar, Alloc >::view_t const &
Returns the non-constant-pixel view of an image.
Definition image.hpp:565
boost
defined(BOOST_NO_CXX17_HDR_MEMORY_RESOURCE)
Definition algorithm.hpp:36
boost::gil::reader_base
Definition reader_base.hpp:29
boost::gil::reader_base::reader_base
reader_base(const ConversionPolicy &cc)
Definition reader_base.hpp:42
boost::gil::reader_base::init_image
void init_image(Image &img, const image_read_settings< FormatTag > &settings)
Definition reader_base.hpp:53
boost::gil::reader_base::reader_base
reader_base()
Definition reader_base.hpp:35