Mercurial > hg > orthanc

annotate Core/Images/PamReader.cpp @ 2699:52217dc47a4e

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new image/pam MIME TYPE supported in /instances/../frames/../image-uint8... routes
author am@osimis.io
date Thu, 05 Jul 2018 12:25:00 +0200
parents
children f77c7b48f798
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rev   line source
2699
52217dc47a4e new image/pam MIME TYPE supported in /instances/../frames/../image-uint8... routes
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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) 2017-2018 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 "../OrthancException.h"
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38 #include "../Toolbox.h"
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39 #include <istream>
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40 #include <sstream>
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41 #include <fstream>
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42 #include <endian.h>
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43 #if ORTHANC_SANDBOXED == 0
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44 # include "../SystemToolbox.h"
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45 #endif
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46
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47 #include <string.h>
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48
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49 namespace Orthanc
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50 {
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51 namespace
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52 {
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53 void GetPixelFormat(PixelFormat& format, unsigned int& bytesPerChannel, const unsigned int& maxValue, const unsigned int& channelCount, const char* tupleType)
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54 {
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55 if (strcmp(tupleType, "GRAYSCALE") == 0 && channelCount == 1)
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56 {
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57 if (maxValue == 255)
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58 {
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59 format = PixelFormat_Grayscale8;
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60 bytesPerChannel = 1;
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61 return;
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62 }
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63 else if (maxValue == 65535)
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64 {
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65 format = PixelFormat_Grayscale16;
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66 bytesPerChannel = 2;
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67 return;
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68 }
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69 }
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70 else if (strcmp(tupleType, "RGB") == 0 && channelCount == 3)
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71 {
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72 if (maxValue == 255)
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73 {
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74 format = PixelFormat_RGB24;
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75 bytesPerChannel = 1;
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76 return;
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77 }
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78 else if (maxValue == 65535)
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79 {
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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 }
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85 throw OrthancException(ErrorCode_NotImplemented);
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86 }
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87
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88 void ReadDelimiter(std::istream& input, const char* expectedDelimiter)
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89 {
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90 std::string delimiter;
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91 input >> delimiter;
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92 if (delimiter != expectedDelimiter)
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93 {
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94 throw OrthancException(ErrorCode_BadFileFormat);
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95 }
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96 }
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97
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98 unsigned int ReadKeyValueUint(std::istream& input, const char* expectedKey)
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99 {
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100 std::string key;
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101 unsigned int value;
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102 input >> key >> value;
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103 if (key != expectedKey)
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104 {
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105 throw OrthancException(ErrorCode_BadFileFormat);
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106 }
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107 return value;
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108 }
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109
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110 std::string ReadKeyValueString(std::istream& input, const char* expectedKey)
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111 {
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112 std::string key;
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113 std::string value;
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114 input >> key >> value;
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115 if (key != expectedKey)
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116 {
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117 throw OrthancException(ErrorCode_BadFileFormat);
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118 }
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119 return value;
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120 }
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121 }
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122
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123 void PamReader::ReadFromStream(std::istream& input)
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124 {
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125 ReadDelimiter(input, "P7");
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126 unsigned int width = ReadKeyValueUint(input, "WIDTH");
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127 unsigned int height = ReadKeyValueUint(input, "HEIGHT");
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128 unsigned int channelCount = ReadKeyValueUint(input, "DEPTH");
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129 unsigned int maxValue = ReadKeyValueUint(input, "MAXVAL");
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130 std::string tupleType = ReadKeyValueString(input, "TUPLTYPE");
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131 ReadDelimiter(input, "ENDHDR");
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132 // skip last EOL
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133 char tmp[16];
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134 input.getline(tmp, 16);
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135
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136 unsigned int bytesPerChannel;
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137 PixelFormat format;
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138 GetPixelFormat(format, bytesPerChannel, maxValue, channelCount, tupleType.c_str());
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139
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140 // read the pixels data
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141 unsigned int sizeInBytes = width * height * channelCount * bytesPerChannel;
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142 data_.reserve(sizeInBytes);
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143 input.read(data_.data(), sizeInBytes);
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144
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145 AssignWritable(format, width, height, width * channelCount * bytesPerChannel, data_.data());
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146
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147 // swap bytes
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148 if (Toolbox::DetectEndianness() == Endianness_Little && bytesPerChannel == 2)
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149 {
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150 uint16_t* pixel = NULL;
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151 for (unsigned int h = 0; h < height; ++h)
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152 {
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153 pixel = reinterpret_cast<uint16_t*> (data_.data() + h * width * channelCount * bytesPerChannel);
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154 for (unsigned int w = 0; w < (width * channelCount); ++w, ++pixel)
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155 {
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156 *pixel = htobe16(*pixel);
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157 }
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158 }
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159 }
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160
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161 }
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162
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163 #if ORTHANC_SANDBOXED == 0
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164 void PamReader::ReadFromFile(const std::string& filename)
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165 {
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166 std::ifstream inputStream(filename, std::ofstream::binary);
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167 ReadFromStream(inputStream);
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168 }
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169 #endif
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170
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171 void PamReader::ReadFromMemory(const void* buffer,
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172 size_t size)
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173 {
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174 std::istringstream inputStream(std::string(reinterpret_cast<const char*>(buffer), size));
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175 ReadFromStream(inputStream);
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176 }
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177
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178 void PamReader::ReadFromMemory(const std::string& buffer)
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179 {
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180 std::istringstream inputStream(buffer);
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181 ReadFromStream(inputStream);
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182 }
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183
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184 }