Mercurial > hg > orthanc

annotate Core/Images/PamReader.cpp @ 3985:cb801e5b4411

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clarifying embedded resources
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 29 May 2020 10:14:26 +0200
parents 95083d2f6819
children
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "PamReader.h"
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36
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37 #include "../Endianness.h"
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38 #include "../OrthancException.h"
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39 #include "../Toolbox.h"
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40
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41 #if ORTHANC_SANDBOXED == 0
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42 # include "../SystemToolbox.h"
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43 #endif
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44
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45 #include <stdlib.h> // For malloc/free
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46 #include <boost/algorithm/string/find.hpp>
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47 #include <boost/lexical_cast.hpp>
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48
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49
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50 namespace Orthanc
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51 {
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52 static void GetPixelFormat(PixelFormat& format,
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53 unsigned int& bytesPerChannel,
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54 const unsigned int& maxValue,
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55 const unsigned int& channelCount,
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56 const std::string& tupleType)
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57 {
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58 if (tupleType == "GRAYSCALE" &&
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59 channelCount == 1)
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60 {
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61 switch (maxValue)
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62 {
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63 case 255:
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64 format = PixelFormat_Grayscale8;
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65 bytesPerChannel = 1;
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66 return;
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67
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68 case 65535:
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69 format = PixelFormat_Grayscale16;
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70 bytesPerChannel = 2;
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71 return;
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72
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73 default:
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74 throw OrthancException(ErrorCode_NotImplemented);
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75 }
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76 }
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77 else if (tupleType == "RGB" &&
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78 channelCount == 3)
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79 {
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80 switch (maxValue)
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81 {
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82 case 255:
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83 format = PixelFormat_RGB24;
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84 bytesPerChannel = 1;
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85 return;
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86
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87 case 65535:
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88 format = PixelFormat_RGB48;
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89 bytesPerChannel = 2;
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90 return;
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91
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92 default:
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93 throw OrthancException(ErrorCode_NotImplemented);
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94 }
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95 }
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96 else
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97 {
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98 throw OrthancException(ErrorCode_NotImplemented);
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99 }
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100 }
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101
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102
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103 typedef std::map<std::string, std::string> Parameters;
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104
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105
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106 static std::string LookupStringParameter(const Parameters& parameters,
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107 const std::string& key)
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108 {
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109 Parameters::const_iterator found = parameters.find(key);
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110
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111 if (found == parameters.end())
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112 {
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113 throw OrthancException(ErrorCode_BadFileFormat);
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114 }
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115 else
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116 {
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117 return found->second;
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118 }
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119 }
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120
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121
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122 static unsigned int LookupIntegerParameter(const Parameters& parameters,
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123 const std::string& key)
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124 {
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125 try
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126 {
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127 int value = boost::lexical_cast<int>(LookupStringParameter(parameters, key));
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128
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129 if (value < 0)
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130 {
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131 throw OrthancException(ErrorCode_BadFileFormat);
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132 }
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133 else
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134 {
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135 return static_cast<unsigned int>(value);
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136 }
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137 }
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138 catch (boost::bad_lexical_cast&)
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139 {
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140 throw OrthancException(ErrorCode_BadFileFormat);
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141 }
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142 }
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143
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144
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145 void PamReader::ParseContent()
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146 {
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147 static const std::string headerDelimiter = "ENDHDR\n";
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148
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149 boost::iterator_range<std::string::const_iterator> headerRange =
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150 boost::algorithm::find_first(content_, headerDelimiter);
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151
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152 if (!headerRange)
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153 {
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154 throw OrthancException(ErrorCode_BadFileFormat);
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155 }
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156
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157 std::string header(static_cast<const std::string&>(content_).begin(), headerRange.begin());
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158
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159 std::vector<std::string> lines;
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160 Toolbox::TokenizeString(lines, header, '\n');
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161
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162 if (lines.size() < 2 ||
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163 lines.front() != "P7" ||
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164 !lines.back().empty())
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165 {
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166 throw OrthancException(ErrorCode_BadFileFormat);
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167 }
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168
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169 Parameters parameters;
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170
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171 for (size_t i = 1; i + 1 < lines.size(); i++)
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172 {
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173 std::vector<std::string> tokens;
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174 Toolbox::TokenizeString(tokens, lines[i], ' ');
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175
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176 if (tokens.size() != 2)
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177 {
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178 throw OrthancException(ErrorCode_BadFileFormat);
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179 }
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180 else
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181 {
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182 parameters[tokens[0]] = tokens[1];
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183 }
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184 }
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185
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186 const unsigned int width = LookupIntegerParameter(parameters, "WIDTH");
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187 const unsigned int height = LookupIntegerParameter(parameters, "HEIGHT");
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188 const unsigned int channelCount = LookupIntegerParameter(parameters, "DEPTH");
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189 const unsigned int maxValue = LookupIntegerParameter(parameters, "MAXVAL");
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190 const std::string tupleType = LookupStringParameter(parameters, "TUPLTYPE");
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191
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192 unsigned int bytesPerChannel;
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193 PixelFormat format;
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194 GetPixelFormat(format, bytesPerChannel, maxValue, channelCount, tupleType.c_str());
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195
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196 unsigned int pitch = width * channelCount * bytesPerChannel;
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197
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198 if (content_.size() != header.size() + headerDelimiter.size() + pitch * height)
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199 {
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200 throw OrthancException(ErrorCode_BadFileFormat);
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201 }
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202
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203 size_t offset = content_.size() - pitch * height;
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204
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205 {
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206 intptr_t bufferAddr = reinterpret_cast<intptr_t>(&content_[offset]);
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207 if((bufferAddr % 8) == 0)
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208 LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr;
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209 else
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210 LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr << " (not a multiple of 8!)";
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211 }
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diff changeset
212
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diff changeset
213 // if we want to enforce alignment, we need to use a freshly allocated
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214 // buffer, since we have no alignment guarantees on the original one
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diff changeset
215 if (enforceAligned_)
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
216 {
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
217 if (alignedImageBuffer_ != NULL)
219de90c1f43 Added a flag to use an extra buffer in PamReader
Benjamin Golinvaux <bgo@osimis.io>
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diff changeset
218 free(alignedImageBuffer_);
219de90c1f43 Added a flag to use an extra buffer in PamReader
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parents: 3640
diff changeset
219 alignedImageBuffer_ = malloc(pitch * height);
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
220 memcpy(alignedImageBuffer_, &content_[offset], pitch* height);
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
221 content_ = "";
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diff changeset
222 AssignWritable(format, width, height, pitch, alignedImageBuffer_);
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
223 }
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
224 else
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
225 {
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diff changeset
226 AssignWritable(format, width, height, pitch, &content_[offset]);
219de90c1f43 Added a flag to use an extra buffer in PamReader
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diff changeset
227 }
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228
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229 // Byte swapping if needed
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230 if (bytesPerChannel != 1 &&
5c18a22cb981 fix portability of PAM reader/writer
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diff changeset
231 bytesPerChannel != 2)
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diff changeset
232 {
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233 throw OrthancException(ErrorCode_NotImplemented);
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234 }
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diff changeset
235
2807
6356e2ceb493 Fix issue #99 (PamWriter test segfaults on alpine linux with gcc 6.4.0)
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parents: 2705
diff changeset
236 if (Toolbox::DetectEndianness() == Endianness_Little &&
6356e2ceb493 Fix issue #99 (PamWriter test segfaults on alpine linux with gcc 6.4.0)
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237 bytesPerChannel == 2)
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238 {
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239 for (unsigned int h = 0; h < height; ++h)
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240 {
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241 uint16_t* pixel = reinterpret_cast<uint16_t*>(GetRow(h));
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diff changeset
242
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diff changeset
243 for (unsigned int w = 0; w < GetWidth(); ++w, ++pixel)
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244 {
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diff changeset
245 #if ORTHANC_ENABLE_WASM == 1
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diff changeset
246 /*
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247
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diff changeset
248 crash (2019-08-05):
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diff changeset
249
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
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diff changeset
250 Uncaught abort(alignment fault) at Error
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
Benjamin Golinvaux <bgo@osimis.io>
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diff changeset
251 at jsStackTrace
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
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diff changeset
252 at stackTrace
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
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diff changeset
253 at abort
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
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254 at alignfault
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diff changeset
255 at SAFE_HEAP_LOAD_i32_2_2 (wasm-function[251132]:39)
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diff changeset
256 at __ZN7Orthanc9PamReader12ParseContentEv (wasm-function[11457]:8088)
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diff changeset
257
3834
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diff changeset
258 Web Assembly IS LITTLE ENDIAN!
3487
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diff changeset
259
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
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diff changeset
260 Perhaps in htobe16 ?
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
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diff changeset
261 */
ce29644acd19 Prevented unaligned memcpy when using Web Assembly
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diff changeset
262 uint8_t* srcdst = reinterpret_cast<uint8_t*>(pixel);
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diff changeset
263 uint8_t tmp = srcdst[0];
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264 srcdst[0] = srcdst[1];
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265 srcdst[1] = tmp;
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266 #else
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267 // memcpy() is necessary to avoid segmentation fault if the
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268 // "pixel" pointer is not 16-bit aligned (which is the case
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269 // if "offset" is an odd number). Check out issue #99:
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270 // https://bitbucket.org/sjodogne/orthanc/issues/99
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271 uint16_t v = htobe16(*pixel);
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272 memcpy(pixel, &v, sizeof(v));
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273 #endif
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274 }
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275 }
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276 }
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277 }
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278
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279
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280 #if ORTHANC_SANDBOXED == 0
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281 void PamReader::ReadFromFile(const std::string& filename)
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282 {
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283 SystemToolbox::ReadFile(content_, filename);
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284 ParseContent();
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285 }
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286 #endif
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287
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288
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289 void PamReader::ReadFromMemory(const std::string& buffer)
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290 {
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291 content_ = buffer;
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292 ParseContent();
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293 }
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294
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295 void PamReader::ReadFromMemory(const void* buffer,
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296 size_t size)
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297 {
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298 content_.assign(reinterpret_cast<const char*>(buffer), size);
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299 ParseContent();
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300 }
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301
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302 PamReader::~PamReader()
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303 {
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304 if (alignedImageBuffer_ != NULL)
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305 {
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306 free(alignedImageBuffer_);
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307 }
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308 }
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309 }