Mercurial > hg > orthanc

annotate OrthancFramework/Sources/Images/PamReader.cpp @ 5676:b744a2cf408a find-refactoring tip

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shorten ParentRetrieveSpecification/ChildrenRetrieveSpecification as ParentSpecification/ChildrenSpecification
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 06 Jul 2024 15:04:28 +0200
parents f7adfb22e20e
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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with this program. If not, see
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21 * <http://www.gnu.org/licenses/>.
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22 **/
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24
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25 #include "../PrecompiledHeaders.h"
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26 #include "PamReader.h"
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27
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28 #include "../Endianness.h"
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29 #include "../Logging.h"
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30 #include "../OrthancException.h"
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31 #include "../Toolbox.h"
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32
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33 #if ORTHANC_SANDBOXED == 0
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34 # include "../SystemToolbox.h"
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35 #endif
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36
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37 #include <stdlib.h> // For malloc/free
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38 #include <boost/algorithm/string/find.hpp>
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39 #include <boost/lexical_cast.hpp>
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40
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41
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42 namespace Orthanc
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43 {
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44 static void GetPixelFormat(PixelFormat& format,
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45 unsigned int& bytesPerChannel,
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46 const unsigned int& maxValue,
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47 const unsigned int& channelCount,
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48 const std::string& tupleType)
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49 {
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50 if (tupleType == "GRAYSCALE" &&
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51 channelCount == 1)
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52 {
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53 switch (maxValue)
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54 {
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55 case 255:
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56 format = PixelFormat_Grayscale8;
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57 bytesPerChannel = 1;
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58 return;
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59
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60 case 65535:
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61 format = PixelFormat_Grayscale16;
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62 bytesPerChannel = 2;
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63 return;
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64
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65 default:
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66 throw OrthancException(ErrorCode_NotImplemented);
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67 }
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68 }
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69 else if (tupleType == "RGB" &&
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70 channelCount == 3)
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71 {
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72 switch (maxValue)
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73 {
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74 case 255:
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75 format = PixelFormat_RGB24;
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76 bytesPerChannel = 1;
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77 return;
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78
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79 case 65535:
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80 format = PixelFormat_RGB48;
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81 bytesPerChannel = 2;
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82 return;
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83
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84 default:
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85 throw OrthancException(ErrorCode_NotImplemented);
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86 }
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87 }
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88 else
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89 {
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90 throw OrthancException(ErrorCode_NotImplemented);
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91 }
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92 }
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93
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94
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95 typedef std::map<std::string, std::string> Parameters;
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96
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97
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98 static std::string LookupStringParameter(const Parameters& parameters,
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99 const std::string& key)
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100 {
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101 Parameters::const_iterator found = parameters.find(key);
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102
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103 if (found == parameters.end())
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104 {
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105 throw OrthancException(ErrorCode_BadFileFormat);
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106 }
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107 else
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108 {
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109 return found->second;
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110 }
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111 }
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112
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113
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114 static unsigned int LookupIntegerParameter(const Parameters& parameters,
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115 const std::string& key)
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116 {
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117 try
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118 {
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119 int value = boost::lexical_cast<int>(LookupStringParameter(parameters, key));
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120
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121 if (value < 0)
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122 {
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123 throw OrthancException(ErrorCode_BadFileFormat);
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124 }
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125 else
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126 {
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127 return static_cast<unsigned int>(value);
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128 }
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129 }
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130 catch (boost::bad_lexical_cast&)
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131 {
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132 throw OrthancException(ErrorCode_BadFileFormat);
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133 }
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134 }
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135
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136
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137 void PamReader::ParseContent()
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138 {
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139 static const std::string headerDelimiter = "ENDHDR\n";
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140
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141 boost::iterator_range<std::string::const_iterator> headerRange =
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142 boost::algorithm::find_first(content_, headerDelimiter);
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143
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144 if (!headerRange)
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145 {
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146 throw OrthancException(ErrorCode_BadFileFormat);
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147 }
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148
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149 std::string header(static_cast<const std::string&>(content_).begin(), headerRange.begin());
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150
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151 std::vector<std::string> lines;
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152 Toolbox::TokenizeString(lines, header, '\n');
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153
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154 if (lines.size() < 2 ||
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155 lines.front() != "P7" ||
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156 !lines.back().empty())
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157 {
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158 throw OrthancException(ErrorCode_BadFileFormat);
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159 }
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160
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161 Parameters parameters;
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162
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163 for (size_t i = 1; i + 1 < lines.size(); i++)
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164 {
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165 std::vector<std::string> tokens;
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166 Toolbox::TokenizeString(tokens, lines[i], ' ');
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167
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168 if (tokens.size() != 2)
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169 {
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170 throw OrthancException(ErrorCode_BadFileFormat);
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171 }
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172 else
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173 {
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174 parameters[tokens[0]] = tokens[1];
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175 }
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176 }
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177
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178 const unsigned int width = LookupIntegerParameter(parameters, "WIDTH");
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179 const unsigned int height = LookupIntegerParameter(parameters, "HEIGHT");
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180 const unsigned int channelCount = LookupIntegerParameter(parameters, "DEPTH");
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181 const unsigned int maxValue = LookupIntegerParameter(parameters, "MAXVAL");
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182 const std::string tupleType = LookupStringParameter(parameters, "TUPLTYPE");
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183
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184 unsigned int bytesPerChannel;
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185 PixelFormat format;
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186 GetPixelFormat(format, bytesPerChannel, maxValue, channelCount, tupleType);
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187
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188 unsigned int pitch = width * channelCount * bytesPerChannel;
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189
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190 if (content_.size() != header.size() + headerDelimiter.size() + pitch * height)
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191 {
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192 throw OrthancException(ErrorCode_BadFileFormat);
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193 }
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194
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195 size_t offset = content_.size() - pitch * height;
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196
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197 {
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198 intptr_t bufferAddr = reinterpret_cast<intptr_t>(&content_[offset]);
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199 if((bufferAddr % 8) == 0)
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200 LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr;
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201 else
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202 LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr << " (not a multiple of 8!)";
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203 }
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204
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205 // if we want to enforce alignment, we need to use a freshly allocated
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206 // buffer, since we have no alignment guarantees on the original one
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207 if (enforceAligned_)
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208 {
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209 if (alignedImageBuffer_ != NULL)
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210 free(alignedImageBuffer_);
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211 alignedImageBuffer_ = malloc(pitch * height);
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212 memcpy(alignedImageBuffer_, &content_[offset], pitch* height);
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213 content_ = "";
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214 AssignWritable(format, width, height, pitch, alignedImageBuffer_);
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215 }
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216 else
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217 {
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218 AssignWritable(format, width, height, pitch, &content_[offset]);
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219 }
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220
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221 // Byte swapping if needed
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222 if (bytesPerChannel != 1 &&
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223 bytesPerChannel != 2)
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224 {
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225 throw OrthancException(ErrorCode_NotImplemented);
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226 }
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227
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228 if (Toolbox::DetectEndianness() == Endianness_Little &&
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229 bytesPerChannel == 2)
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230 {
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231 for (unsigned int h = 0; h < height; ++h)
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232 {
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233 uint16_t* pixel = reinterpret_cast<uint16_t*>(GetRow(h));
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diff changeset
234
4278
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235 for (unsigned int w = 0; w < width; ++w, ++pixel)
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236 {
4325
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237 /**
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238 * This is Little-Endian computer, and PAM uses
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239 * Big-Endian. Need to do a 16-bit swap. We DON'T use
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240 * "htobe16()", as the latter only works if the "pixel"
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241 * pointer is 16-bit aligned (which is not the case if
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242 * "offset" is an odd number), and the trick that was used
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243 * in Orthanc <= 1.8.0 (i.e. make a "memcpy()" to a local
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244 * uint16_t variable) doesn't seem work for WebAssembly. We
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245 * thus use a plain old C implementation. Check out issue
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246 * #99: https://orthanc.uclouvain.be/bugs/show_bug.cgi?id=99
4325
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247 *
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248 * Here is the crash log on WebAssembly (2019-08-05):
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249 *
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250 * Uncaught abort(alignment fault) at Error
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251 * at jsStackTrace
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252 * at stackTrace
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253 * at abort
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254 * at alignfault
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255 * at SAFE_HEAP_LOAD_i32_2_2 (wasm-function[251132]:39)
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256 * at __ZN7Orthanc9PamReader12ParseContentEv (wasm-function[11457]:8088)
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diff changeset
257 **/
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258 uint8_t* srcdst = reinterpret_cast<uint8_t*>(pixel);
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259 uint8_t tmp = srcdst[0];
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260 srcdst[0] = srcdst[1];
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261 srcdst[1] = tmp;
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262 }
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263 }
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264 }
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265 }
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266
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267 PamReader::PamReader(bool enforceAligned) :
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268 enforceAligned_(enforceAligned),
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269 alignedImageBuffer_(NULL)
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270 {
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271 }
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272
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273
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274 #if ORTHANC_SANDBOXED == 0
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275 void PamReader::ReadFromFile(const std::string& filename)
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276 {
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277 SystemToolbox::ReadFile(content_, filename);
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278 ParseContent();
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279 }
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280 #endif
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281
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282
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283 void PamReader::ReadFromMemory(const std::string& buffer)
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284 {
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285 content_ = buffer;
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286 ParseContent();
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287 }
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288
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289 void PamReader::ReadFromMemory(const void* buffer,
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290 size_t size)
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291 {
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292 content_.assign(reinterpret_cast<const char*>(buffer), size);
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293 ParseContent();
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294 }
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295
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296 PamReader::~PamReader()
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297 {
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298 if (alignedImageBuffer_ != NULL)
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299 {
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300 free(alignedImageBuffer_);
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301 }
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302 }
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303 }