Mercurial > hg > orthanc
annotate Core/Images/PamWriter.cpp @ 3823:897ca3103253 transcoding
new class: DicomStoreUserConnection
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 10 Apr 2020 14:39:20 +0200 |
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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 "PamWriter.h" |
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36 |
2703 | 37 #include "../Endianness.h" |
38 #include "../OrthancException.h" | |
39 #include "../Toolbox.h" | |
40 | |
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41 #include <boost/lexical_cast.hpp> |
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42 |
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43 |
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44 namespace Orthanc |
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45 { |
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46 static void GetPixelFormatInfo(const PixelFormat& format, |
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47 unsigned int& maxValue, |
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48 unsigned int& channelCount, |
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49 unsigned int& bytesPerChannel, |
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50 std::string& tupleType) |
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51 { |
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52 switch (format) |
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53 { |
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54 case PixelFormat_Grayscale8: |
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55 maxValue = 255; |
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56 channelCount = 1; |
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57 bytesPerChannel = 1; |
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58 tupleType = "GRAYSCALE"; |
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59 break; |
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60 |
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61 case PixelFormat_SignedGrayscale16: |
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62 case PixelFormat_Grayscale16: |
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63 maxValue = 65535; |
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64 channelCount = 1; |
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65 bytesPerChannel = 2; |
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66 tupleType = "GRAYSCALE"; |
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67 break; |
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68 |
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69 case PixelFormat_RGB24: |
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70 maxValue = 255; |
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71 channelCount = 3; |
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72 bytesPerChannel = 1; |
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73 tupleType = "RGB"; |
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74 break; |
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75 |
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76 case PixelFormat_RGB48: |
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77 maxValue = 255; |
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78 channelCount = 3; |
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79 bytesPerChannel = 2; |
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80 tupleType = "RGB"; |
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81 break; |
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82 |
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83 default: |
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84 throw OrthancException(ErrorCode_NotImplemented); |
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85 } |
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86 } |
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87 |
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88 |
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89 void PamWriter::WriteToMemoryInternal(std::string& target, |
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90 unsigned int width, |
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91 unsigned int height, |
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92 unsigned int sourcePitch, |
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93 PixelFormat format, |
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94 const void* buffer) |
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95 { |
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96 unsigned int maxValue, channelCount, bytesPerChannel; |
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97 std::string tupleType; |
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98 GetPixelFormatInfo(format, maxValue, channelCount, bytesPerChannel, tupleType); |
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99 |
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100 target = (std::string("P7") + |
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101 std::string("\nWIDTH ") + boost::lexical_cast<std::string>(width) + |
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102 std::string("\nHEIGHT ") + boost::lexical_cast<std::string>(height) + |
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103 std::string("\nDEPTH ") + boost::lexical_cast<std::string>(channelCount) + |
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104 std::string("\nMAXVAL ") + boost::lexical_cast<std::string>(maxValue) + |
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105 std::string("\nTUPLTYPE ") + tupleType + |
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106 std::string("\nENDHDR\n")); |
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107 |
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108 if (bytesPerChannel != 1 && |
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109 bytesPerChannel != 2) |
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110 { |
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111 throw OrthancException(ErrorCode_NotImplemented); |
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112 } |
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113 |
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114 size_t targetPitch = channelCount * bytesPerChannel * width; |
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115 size_t offset = target.size(); |
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116 |
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117 target.resize(offset + targetPitch * height); |
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118 |
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119 assert(target.size() != 0); |
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120 |
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121 if (Toolbox::DetectEndianness() == Endianness_Little && |
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122 bytesPerChannel == 2) |
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123 { |
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124 // Byte swapping |
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125 for (unsigned int h = 0; h < height; ++h) |
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126 { |
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127 const uint16_t* p = reinterpret_cast<const uint16_t*> |
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128 (reinterpret_cast<const uint8_t*>(buffer) + h * sourcePitch); |
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129 uint16_t* q = reinterpret_cast<uint16_t*> |
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130 (reinterpret_cast<uint8_t*>(&target[offset]) + h * targetPitch); |
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131 |
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132 for (unsigned int w = 0; w < width * channelCount; ++w) |
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133 { |
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134 // memcpy() is necessary to avoid segmentation fault if the |
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135 // "pixel" pointer is not 16-bit aligned (which is the case |
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136 // if "offset" is an odd number). Check out issue #99: |
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137 // https://bitbucket.org/sjodogne/orthanc/issues/99 |
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138 uint16_t v = htobe16(*p); |
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139 memcpy(q, &v, sizeof(uint16_t)); |
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140 |
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141 p++; |
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142 q++; |
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143 } |
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144 } |
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145 } |
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146 else |
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147 { |
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148 // Either "bytesPerChannel == 1" (and endianness is not |
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149 // relevant), or we run on a big endian architecture (and no |
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150 // byte swapping is necessary, as PAM uses big endian) |
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151 |
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152 for (unsigned int h = 0; h < height; ++h) |
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153 { |
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154 const void* p = reinterpret_cast<const uint8_t*>(buffer) + h * sourcePitch; |
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155 void* q = reinterpret_cast<uint8_t*>(&target[offset]) + h * targetPitch; |
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156 memcpy(q, p, targetPitch); |
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157 } |
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158 } |
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159 } |
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160 } |