load.hh 5.63 KB
Newer Older
Guillaume Lazzara's avatar
Guillaume Lazzara committed
1
// Copyright (C) 2010 EPITA Research and Development Laboratory
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
// (LRDE)
//
// This file is part of Olena.
//
// Olena is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation, version 2 of the License.
//
// Olena is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free
// software project without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to produce
// an executable, this file does not by itself cause the resulting
// executable to be covered by the GNU General Public License.  This
// exception does not however invalidate any other reasons why the
// executable file might be covered by the GNU General Public License.

#ifndef MLN_IO_RAW_LOAD_HH
# define MLN_IO_RAW_LOAD_HH

/// \file
///
/// Load an image saved as a raw data file.

# include <iostream>
# include <fstream>

# include <mln/core/concept/image.hh>
# include <mln/core/routine/initialize.hh>
# include <mln/core/box_runstart_piter.hh>
# include <mln/core/pixel.hh>
# include <mln/data/memcpy_.hh>

namespace mln
{

  namespace io
  {

    namespace raw
    {

      /// Load an image saved as a raw data file.
      ///
      /// \param[in,out] ima_ The image to load.
      /// \param[in] filename the destination.
      ///
      /// This routine try to read two input files: 'filename' and
      /// 'filename.info'.
      /// 'filename' is the raw data.
      /// 'filename.info' store various information about the image.
      //
      template <typename I>
      void load(Image<I>& ima_, const std::string& filename);


# ifndef MLN_INCLUDE_ONLY

      namespace internal
      {

	template <typename P>
	inline
	void read_point(std::ifstream& file, P& p)
	{
	  for (unsigned i = 0; i < P::dim; ++i)
	    file >> p[i];
	}


	template <typename I>
        inline
        void load_header(Image<I>& ima, std::ifstream& info_file,
			 const std::string& filename)
	{
	  // Milena's file type ?
	  std::string file_type;
	  info_file >> file_type;
	  if (file_type != "milena/raw")
	  {
	    std::cerr << "io::raw::load - Error: invalid file type. '"
		      << filename
		      << "' is NOT a valid milena/raw info file!"
		      << std::endl;
	    abort();
	  }

	  char dev_null[255];

	  // Dimension ?
	  // Reading line title "Dim: "
	  info_file.read(dev_null, 5);

	  unsigned dim;
	  info_file >> dim;

	  typedef mln_site(I) P;
	  if (P::dim != dim)
	  {
	    std::cerr << "io::raw::load - Error: invalid image dimension. '"
		      << filename << "' is a " << dim << "-D image "
		      << "but you try to load it into a " << P::dim
		      << "-D image!"
		      << std::endl;
	    abort();
	  }

	  // Size information - Skip it, useless.
	  std::string tmp;
	  for (unsigned i = 0; i < dim; ++i)
	    info_file >> tmp;
	  // Skipping endline.
	  char c;
	  info_file.get(c);

	  // Value type name ?
	  // Reading line title "data type: "
	  info_file.read(dev_null, 11);
	  // WARNING: value type name limited to 255 characters...
	  char value_type[255];
	  info_file.getline(value_type, 255);
	  if (mln_trait_value_name(mln_value(I)) != std::string(value_type))
	  {
	    std::cerr << "io::raw::load - Error: invalid image value type. '"
		      << filename << "' is an image of '" << value_type
		      << "' but you try to load it into an image of '"
		      << mln_trait_value_name(mln_value(I)) << "'!"
		      << std::endl;
	    abort();
	  }

	  // Pmin
	  // Reading line title "top left: "
	  info_file.read(dev_null, 10);
	  P pmin;
	  read_point<P>(info_file, pmin);

	  // Pmax
	  // Reading line title "bottom right: "
	  info_file.read(dev_null, 14);
	  P pmax;
	  read_point<P>(info_file, pmax);
	  std::cout << pmax << std::endl;

	  // Initialize the image buffer.
	  mln_concrete(I) result(box<P>(pmin, pmax));
	  initialize(ima, result);
	  mln_assertion(exact(ima).is_valid());
	}


	template <typename I>
        inline
        void load_data(Image<I>& ima_, std::ifstream& file)
	{
	  I& ima = exact(ima_);

	  // Handle padding.
	  unsigned data_size = sizeof (mln_value(I)) + sizeof (mln_value(I)) % 2;

	  mln_box_runstart_piter(I) p(ima.domain());
	  for_all(p)
	  {
	    pixel<I> src(ima, p);
	    file.read((char*) (&src.val()), p.run_length() * data_size);
	  }

	}

      } // end of namespace mln::io::raw::internal



      template <typename I>
      void load(Image<I>& ima, const std::string& filename)
      {
	trace::entering("mln::io::raw::load");

	std::ifstream file(filename.c_str());
	if (! file)
	{
	  std::cerr << "io::raw::load - error: cannot open file '"
		    << filename << "'!";
	  abort();
	}

	std::string info_filename = filename + ".info";
	std::ifstream info_file(info_filename.c_str());
	if (! info_file)
	{
	  std::cerr << "io::raw::load - error: cannot open file '"
		    << info_filename << "'!";
	  abort();
	}


	internal::load_header(ima, info_file, info_filename);
	internal::load_data(ima, file);

	mln_postcondition(exact(ima).is_valid());

	file.close();
	info_file.close();

	trace::exiting("mln::io::raw::load");
      }


# endif // ! MLN_INCLUDE_ONLY

    } // end of namespace mln::io::raw

  } // end of namespace mln::io

} // end of namespace mln

#endif // ! MLN_IO_RAW_LOAD_HH