Mercurial > hg > orthanc
annotate Core/Images/PamReader.cpp @ 3502:c160eafc42a9
new functions in ImageProcessing toolbox: FlipX/Y(), Resize(), Halve()
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 26 Aug 2019 10:23:51 +0200 |
parents | ce29644acd19 |
children | 94f4a18a79cc |
rev | line source |
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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) 2017-2019 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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38 #include "../OrthancException.h" |
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39 #include "../Toolbox.h" |
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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 <boost/algorithm/string/find.hpp> |
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46 #include <boost/lexical_cast.hpp> |
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47 |
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48 |
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49 namespace Orthanc |
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50 { |
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51 static void GetPixelFormat(PixelFormat& format, |
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52 unsigned int& bytesPerChannel, |
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53 const unsigned int& maxValue, |
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54 const unsigned int& channelCount, |
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55 const std::string& tupleType) |
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56 { |
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57 if (tupleType == "GRAYSCALE" && |
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58 channelCount == 1) |
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59 { |
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60 switch (maxValue) |
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61 { |
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62 case 255: |
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63 format = PixelFormat_Grayscale8; |
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64 bytesPerChannel = 1; |
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65 return; |
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66 |
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67 case 65535: |
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68 format = PixelFormat_Grayscale16; |
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69 bytesPerChannel = 2; |
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70 return; |
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71 |
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72 default: |
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73 throw OrthancException(ErrorCode_NotImplemented); |
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74 } |
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75 } |
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76 else if (tupleType == "RGB" && |
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77 channelCount == 3) |
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78 { |
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79 switch (maxValue) |
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80 { |
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81 case 255: |
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82 format = PixelFormat_RGB24; |
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83 bytesPerChannel = 1; |
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84 return; |
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85 |
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86 case 65535: |
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87 format = PixelFormat_RGB48; |
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88 bytesPerChannel = 2; |
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89 return; |
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90 |
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91 default: |
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92 throw OrthancException(ErrorCode_NotImplemented); |
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93 } |
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94 } |
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95 else |
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96 { |
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97 throw OrthancException(ErrorCode_NotImplemented); |
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98 } |
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99 } |
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100 |
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101 |
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102 typedef std::map<std::string, std::string> Parameters; |
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103 |
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104 |
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105 static std::string LookupStringParameter(const Parameters& parameters, |
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106 const std::string& key) |
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107 { |
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108 Parameters::const_iterator found = parameters.find(key); |
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109 |
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110 if (found == parameters.end()) |
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111 { |
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112 throw OrthancException(ErrorCode_BadFileFormat); |
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113 } |
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114 else |
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115 { |
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116 return found->second; |
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117 } |
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118 } |
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119 |
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120 |
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121 static unsigned int LookupIntegerParameter(const Parameters& parameters, |
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122 const std::string& key) |
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123 { |
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124 try |
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125 { |
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126 int value = boost::lexical_cast<int>(LookupStringParameter(parameters, key)); |
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127 |
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128 if (value < 0) |
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129 { |
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130 throw OrthancException(ErrorCode_BadFileFormat); |
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131 } |
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132 else |
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133 { |
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134 return static_cast<unsigned int>(value); |
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135 } |
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136 } |
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137 catch (boost::bad_lexical_cast&) |
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138 { |
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139 throw OrthancException(ErrorCode_BadFileFormat); |
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140 } |
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141 } |
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142 |
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143 |
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144 void PamReader::ParseContent() |
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145 { |
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146 static const std::string headerDelimiter = "ENDHDR\n"; |
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147 |
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148 boost::iterator_range<std::string::const_iterator> headerRange = |
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149 boost::algorithm::find_first(content_, headerDelimiter); |
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150 |
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151 if (!headerRange) |
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152 { |
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153 throw OrthancException(ErrorCode_BadFileFormat); |
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154 } |
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155 |
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156 std::string header(static_cast<const std::string&>(content_).begin(), headerRange.begin()); |
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157 |
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158 std::vector<std::string> lines; |
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159 Toolbox::TokenizeString(lines, header, '\n'); |
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160 |
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161 if (lines.size() < 2 || |
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162 lines.front() != "P7" || |
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163 !lines.back().empty()) |
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164 { |
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165 throw OrthancException(ErrorCode_BadFileFormat); |
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166 } |
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167 |
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168 Parameters parameters; |
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169 |
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170 for (size_t i = 1; i + 1 < lines.size(); i++) |
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171 { |
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172 std::vector<std::string> tokens; |
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173 Toolbox::TokenizeString(tokens, lines[i], ' '); |
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174 |
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175 if (tokens.size() != 2) |
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176 { |
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177 throw OrthancException(ErrorCode_BadFileFormat); |
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178 } |
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179 else |
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180 { |
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181 parameters[tokens[0]] = tokens[1]; |
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182 } |
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183 } |
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184 |
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185 const unsigned int width = LookupIntegerParameter(parameters, "WIDTH"); |
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186 const unsigned int height = LookupIntegerParameter(parameters, "HEIGHT"); |
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187 const unsigned int channelCount = LookupIntegerParameter(parameters, "DEPTH"); |
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188 const unsigned int maxValue = LookupIntegerParameter(parameters, "MAXVAL"); |
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189 const std::string tupleType = LookupStringParameter(parameters, "TUPLTYPE"); |
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190 |
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191 unsigned int bytesPerChannel; |
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192 PixelFormat format; |
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193 GetPixelFormat(format, bytesPerChannel, maxValue, channelCount, tupleType.c_str()); |
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194 |
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195 unsigned int pitch = width * channelCount * bytesPerChannel; |
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196 |
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197 if (content_.size() != header.size() + headerDelimiter.size() + pitch * height) |
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198 { |
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199 throw OrthancException(ErrorCode_BadFileFormat); |
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200 } |
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201 |
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202 size_t offset = content_.size() - pitch * height; |
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203 AssignWritable(format, width, height, pitch, &content_[offset]); |
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204 |
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205 // Byte swapping if needed |
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206 if (bytesPerChannel != 1 && |
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207 bytesPerChannel != 2) |
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208 { |
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209 throw OrthancException(ErrorCode_NotImplemented); |
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210 } |
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211 |
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212 if (Toolbox::DetectEndianness() == Endianness_Little && |
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213 bytesPerChannel == 2) |
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214 { |
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215 for (unsigned int h = 0; h < height; ++h) |
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216 { |
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217 uint16_t* pixel = reinterpret_cast<uint16_t*>(GetRow(h)); |
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218 |
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219 for (unsigned int w = 0; w < GetWidth(); ++w, ++pixel) |
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220 { |
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221 #if ORTHANC_ENABLE_WASM == 1 |
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222 /* |
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223 |
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224 crash (2019-08-05): |
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225 |
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226 Uncaught abort(alignment fault) at Error |
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227 at jsStackTrace |
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228 at stackTrace |
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229 at abort |
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230 at alignfault |
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231 at SAFE_HEAP_LOAD_i32_2_2 (wasm-function[251132]:39) |
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232 at __ZN7Orthanc9PamReader12ParseContentEv (wasm-function[11457]:8088) |
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233 |
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234 Web Assenmbly IS LITTLE ENDIAN! |
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235 |
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236 Perhaps in htobe16 ? |
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237 */ |
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238 uint8_t* srcdst = reinterpret_cast<uint8_t*>(pixel); |
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239 uint8_t tmp = srcdst[0]; |
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240 srcdst[0] = srcdst[1]; |
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241 srcdst[1] = tmp; |
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242 #else |
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243 // memcpy() is necessary to avoid segmentation fault if the |
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244 // "pixel" pointer is not 16-bit aligned (which is the case |
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245 // if "offset" is an odd number). Check out issue #99: |
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246 // https://bitbucket.org/sjodogne/orthanc/issues/99 |
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247 uint16_t v = htobe16(*pixel); |
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248 memcpy(pixel, &v, sizeof(v)); |
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249 #endif |
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250 } |
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251 } |
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252 } |
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253 } |
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254 |
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255 |
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256 #if ORTHANC_SANDBOXED == 0 |
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257 void PamReader::ReadFromFile(const std::string& filename) |
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258 { |
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259 SystemToolbox::ReadFile(content_, filename); |
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260 ParseContent(); |
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261 } |
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262 #endif |
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263 |
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264 |
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265 void PamReader::ReadFromMemory(const std::string& buffer) |
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266 { |
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267 content_ = buffer; |
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268 ParseContent(); |
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269 } |
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270 |
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271 void PamReader::ReadFromMemory(const void* buffer, |
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272 size_t size) |
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273 { |
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274 content_.assign(reinterpret_cast<const char*>(buffer), size); |
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275 ParseContent(); |
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276 } |
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277 } |