Mercurial > hg > orthanc
annotate OrthancFramework/Sources/Images/PamWriter.cpp @ 4845:02d77189d8ba received-instance-callback
added ReceivedInstanceCallback + sample C++ plugin
author | Alain Mazy <am@osimis.io> |
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date | Thu, 09 Dec 2021 17:22:40 +0100 |
parents | 7053502fbf97 |
children | 43e613a7756b |
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) 2017-2021 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
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7 * |
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8 * This program is free software: you can redistribute it and/or |
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9 * modify it under the terms of the GNU Lesser General Public License |
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10 * as published by the Free Software Foundation, either version 3 of |
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11 * the License, or (at your option) any later version. |
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12 * |
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13 * This program is distributed in the hope that it will be useful, but |
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Lesser General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
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21 **/ |
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22 |
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23 |
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24 #include "../PrecompiledHeaders.h" |
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25 #include "PamWriter.h" |
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26 |
2703 | 27 #include "../Endianness.h" |
28 #include "../OrthancException.h" | |
29 #include "../Toolbox.h" | |
30 | |
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31 #include <boost/lexical_cast.hpp> |
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32 |
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33 |
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34 namespace Orthanc |
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35 { |
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36 static void GetPixelFormatInfo(const PixelFormat& format, |
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37 unsigned int& maxValue, |
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38 unsigned int& channelCount, |
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39 unsigned int& bytesPerChannel, |
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40 std::string& tupleType) |
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41 { |
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42 switch (format) |
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43 { |
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44 case PixelFormat_Grayscale8: |
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45 maxValue = 255; |
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46 channelCount = 1; |
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47 bytesPerChannel = 1; |
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48 tupleType = "GRAYSCALE"; |
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49 break; |
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50 |
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51 case PixelFormat_SignedGrayscale16: |
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52 case PixelFormat_Grayscale16: |
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53 maxValue = 65535; |
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54 channelCount = 1; |
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55 bytesPerChannel = 2; |
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56 tupleType = "GRAYSCALE"; |
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57 break; |
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58 |
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59 case PixelFormat_RGB24: |
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60 maxValue = 255; |
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61 channelCount = 3; |
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62 bytesPerChannel = 1; |
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63 tupleType = "RGB"; |
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64 break; |
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65 |
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66 case PixelFormat_RGB48: |
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67 maxValue = 255; |
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68 channelCount = 3; |
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69 bytesPerChannel = 2; |
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70 tupleType = "RGB"; |
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71 break; |
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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 |
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78 |
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79 void PamWriter::WriteToMemoryInternal(std::string& target, |
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80 unsigned int width, |
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81 unsigned int height, |
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82 unsigned int sourcePitch, |
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83 PixelFormat format, |
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84 const void* buffer) |
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85 { |
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86 unsigned int maxValue, channelCount, bytesPerChannel; |
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87 std::string tupleType; |
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88 GetPixelFormatInfo(format, maxValue, channelCount, bytesPerChannel, tupleType); |
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89 |
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90 target = (std::string("P7") + |
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91 std::string("\nWIDTH ") + boost::lexical_cast<std::string>(width) + |
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92 std::string("\nHEIGHT ") + boost::lexical_cast<std::string>(height) + |
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93 std::string("\nDEPTH ") + boost::lexical_cast<std::string>(channelCount) + |
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94 std::string("\nMAXVAL ") + boost::lexical_cast<std::string>(maxValue) + |
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95 std::string("\nTUPLTYPE ") + tupleType + |
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96 std::string("\nENDHDR\n")); |
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97 |
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98 if (bytesPerChannel != 1 && |
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99 bytesPerChannel != 2) |
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100 { |
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101 throw OrthancException(ErrorCode_NotImplemented); |
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102 } |
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103 |
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104 size_t targetPitch = channelCount * bytesPerChannel * width; |
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105 size_t offset = target.size(); |
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106 |
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107 target.resize(offset + targetPitch * height); |
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108 |
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109 assert(target.size() != 0); |
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110 |
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111 if (Toolbox::DetectEndianness() == Endianness_Little && |
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112 bytesPerChannel == 2) |
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113 { |
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114 // Byte swapping |
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115 for (unsigned int h = 0; h < height; ++h) |
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116 { |
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117 const uint16_t* p = reinterpret_cast<const uint16_t*> |
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118 (reinterpret_cast<const uint8_t*>(buffer) + h * sourcePitch); |
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119 uint16_t* q = reinterpret_cast<uint16_t*> |
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120 (reinterpret_cast<uint8_t*>(&target[offset]) + h * targetPitch); |
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121 |
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122 for (unsigned int w = 0; w < width * channelCount; ++w) |
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123 { |
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124 /** |
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125 * This is Little-Endian computer, and PAM uses |
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126 * Big-Endian. Need to do a 16-bit swap. We DON'T use |
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127 * "htobe16()", as the latter only works if the "pixel" |
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128 * pointer is 16-bit aligned (which is not the case if |
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129 * "offset" is an odd number), and the trick that was used |
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130 * in Orthanc <= 1.8.0 (i.e. make a "memcpy()" to a local |
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131 * uint16_t variable) doesn't seem work for WebAssembly. We |
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132 * thus use a plain old C implementation. Check out issue |
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133 * #99: https://bugs.orthanc-server.com/show_bug.cgi?id=99 |
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134 **/ |
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135 const uint8_t* a = reinterpret_cast<const uint8_t*>(p); |
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136 uint8_t* b = reinterpret_cast<uint8_t*>(q); |
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137 b[0] = a[1]; |
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138 b[1] = a[0]; |
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139 |
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140 p++; |
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141 q++; |
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142 } |
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143 } |
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144 } |
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145 else |
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146 { |
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147 // Either "bytesPerChannel == 1" (and endianness is not |
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148 // relevant), or we run on a big endian architecture (and no |
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149 // byte swapping is necessary, as PAM uses big endian) |
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150 |
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151 for (unsigned int h = 0; h < height; ++h) |
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152 { |
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153 const void* p = reinterpret_cast<const uint8_t*>(buffer) + h * sourcePitch; |
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154 void* q = reinterpret_cast<uint8_t*>(&target[offset]) + h * targetPitch; |
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155 memcpy(q, p, targetPitch); |
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156 } |
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157 } |
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158 } |
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159 } |