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1 /**
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2 * Stone of Orthanc
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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 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "VolumeImage.h"
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34
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16
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35 #include "../../Resources/Orthanc/Core/Logging.h"
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0
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36 #include "../Layers/FrameRenderer.h"
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37
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38 namespace OrthancStone
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39 {
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40 void VolumeImage::StoreUpdateTime()
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41 {
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42 lastUpdate_ = MessagingToolbox::Timestamp();
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43 }
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44
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45
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46 void VolumeImage::NotifyChange(bool force)
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47 {
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48 bool go = false;
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49
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50 if (force)
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51 {
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52 go = true;
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53 }
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54 else
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55 {
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56 // Don't notify the observers more than 5 times per second
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57 MessagingToolbox::Timestamp now;
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58 go = (now.GetMillisecondsSince(lastUpdate_) > 200);
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59 }
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60
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61 if (go)
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62 {
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63 StoreUpdateTime();
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64 observers_.NotifyChange(this);
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65 }
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66 }
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67
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68
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69 void VolumeImage::LoadThread(VolumeImage* that)
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70 {
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71 while (that->continue_)
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72 {
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73 bool complete = false;
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74 bool done = that->policy_->DownloadStep(complete);
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75
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76 if (complete)
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77 {
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78 that->loadingComplete_ = true;
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79 }
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80
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81 if (done)
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82 {
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83 break;
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84 }
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85 else
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86 {
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87 that->NotifyChange(false);
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88 }
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89 }
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90
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91 that->NotifyChange(true);
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92 }
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93
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94
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95 VolumeImage::VolumeImage(ISeriesLoader* loader) : // Takes ownership
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96 loader_(loader),
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97 threads_(1),
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98 started_(false),
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99 continue_(false),
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100 loadingComplete_(false)
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101 {
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102 if (loader == NULL)
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103 {
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104 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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105 }
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106
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107 const size_t depth = loader_->GetGeometry().GetSliceCount();
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108
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109 if (depth < 2)
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110 {
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111 // Empty or flat series
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112 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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113 }
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114
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115 // TODO Check pixel spacing, slice thickness, and windowing are
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116 // constant across slices
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117 referenceDataset_.reset(loader->DownloadDicom(0));
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118
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119 double spacingZ;
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120
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121 {
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122 // Project the origin of the first and last slices onto the normal
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123 const SliceGeometry& s1 = loader_->GetGeometry().GetSlice(0);
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124 const SliceGeometry& s2 = loader_->GetGeometry().GetSlice(depth - 1);
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125 const Vector& normal = loader_->GetGeometry().GetNormal();
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126
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127 double p1 = boost::numeric::ublas::inner_prod(s1.GetOrigin(), normal);
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128 double p2 = boost::numeric::ublas::inner_prod(s2.GetOrigin(), normal);
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129
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130 spacingZ = fabs(p2 - p1) / static_cast<double>(depth);
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131
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132 // TODO Check that all slices are evenly distributed
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133 }
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134
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135 buffer_.reset(new ImageBuffer3D(loader_->GetPixelFormat(),
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136 loader_->GetWidth(),
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137 loader_->GetHeight(),
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138 depth));
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139 buffer_->Clear();
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140 buffer_->SetAxialGeometry(loader_->GetGeometry().GetSlice(0));
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141
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142 double spacingX, spacingY;
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32
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143 GeometryToolbox::GetPixelSpacing(spacingX, spacingY, *referenceDataset_);
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144 buffer_->SetVoxelDimensions(spacingX, spacingY, spacingZ);
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145
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146 // These 3 values are only used to speed up the LayerFactory
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147 axialGeometry_.reset(buffer_->GetGeometry(VolumeProjection_Axial));
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148 coronalGeometry_.reset(buffer_->GetGeometry(VolumeProjection_Coronal));
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149 sagittalGeometry_.reset(buffer_->GetGeometry(VolumeProjection_Sagittal));
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150 }
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151
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152
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153 VolumeImage::~VolumeImage()
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154 {
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155 Stop();
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156
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157 for (size_t i = 0; i < threads_.size(); i++)
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158 {
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159 if (threads_[i] != NULL)
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160 {
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161 delete threads_[i];
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162 }
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163 }
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164 }
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165
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166
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167 void VolumeImage::SetDownloadPolicy(IDownloadPolicy* policy) // Takes ownership
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168 {
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169 if (started_)
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170 {
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171 LOG(ERROR) << "Cannot change the number of threads after a call to Start()";
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172 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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173 }
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174
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175 policy_.reset(policy);
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176 }
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177
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178
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179 void VolumeImage::SetThreadCount(size_t count)
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180 {
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181 if (started_)
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182 {
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183 LOG(ERROR) << "Cannot change the number of threads after a call to Start()";
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184 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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185 }
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186
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187 if (count <= 0)
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188 {
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189 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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190 }
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191
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192 threads_.resize(count);
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193 }
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194
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195
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196 void VolumeImage::Register(IChangeObserver& observer)
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197 {
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198 observers_.Register(observer);
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199 }
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200
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201
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202 void VolumeImage::Unregister(IChangeObserver& observer)
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203 {
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204 observers_.Unregister(observer);
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205 }
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206
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207
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208 void VolumeImage::Start()
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209 {
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210 if (started_)
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211 {
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212 LOG(ERROR) << "Cannot call Start() twice";
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213 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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214 }
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215
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216 started_ = true;
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217 StoreUpdateTime();
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218
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219 if (policy_.get() != NULL &&
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220 threads_.size() > 0)
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221 {
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222 continue_ = true;
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223 policy_->Initialize(*buffer_, *loader_);
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224
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225 for (size_t i = 0; i < threads_.size(); i++)
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226 {
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227 assert(threads_[i] == NULL);
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228 threads_[i] = new boost::thread(LoadThread, this);
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229 }
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230 }
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231 }
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232
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233
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234 void VolumeImage::Stop()
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235 {
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236 if (!started_)
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237 {
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238 LOG(ERROR) << "Cannot call Stop() without calling Start() beforehand";
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239 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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240 }
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241
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242 if (continue_)
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243 {
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244 continue_ = false;
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245
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246 for (size_t i = 0; i < threads_.size(); i++)
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247 {
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248 if (threads_[i]->joinable())
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249 {
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250 threads_[i]->join();
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251 }
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252 }
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253
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254 assert(policy_.get() != NULL);
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255 policy_->Finalize();
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256 }
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257 }
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258
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259
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260 ParallelSlices* VolumeImage::GetGeometry(VolumeProjection projection,
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261 bool reverse)
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262 {
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263 std::auto_ptr<ParallelSlices> slices(buffer_->GetGeometry(projection));
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264
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265 if (reverse)
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266 {
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267 return slices->Reverse();
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268 }
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269 else
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270 {
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271 return slices.release();
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272 }
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273 }
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274
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275
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276 bool VolumeImage::DetectProjection(VolumeProjection& projection,
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277 bool& reverse,
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278 const SliceGeometry& viewportSlice)
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279 {
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280 if (GeometryToolbox::IsParallelOrOpposite(reverse, viewportSlice.GetNormal(), axialGeometry_->GetNormal()))
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281 {
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282 projection = VolumeProjection_Axial;
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283 return true;
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284 }
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285 else if (GeometryToolbox::IsParallelOrOpposite(reverse, viewportSlice.GetNormal(), sagittalGeometry_->GetNormal()))
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286 {
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287 projection = VolumeProjection_Sagittal;
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288 return true;
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289 }
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290 else if (GeometryToolbox::IsParallelOrOpposite(reverse, viewportSlice.GetNormal(), coronalGeometry_->GetNormal()))
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291 {
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292 projection = VolumeProjection_Coronal;
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293 return true;
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294 }
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295 else
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296 {
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297 return false;
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298 }
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299 }
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300
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301
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302 const ParallelSlices& VolumeImage::GetGeometryInternal(VolumeProjection projection)
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303 {
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304 switch (projection)
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305 {
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306 case VolumeProjection_Axial:
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307 return *axialGeometry_;
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308
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309 case VolumeProjection_Sagittal:
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310 return *sagittalGeometry_;
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311
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312 case VolumeProjection_Coronal:
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313 return *coronalGeometry_;
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314
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315 default:
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316 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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317 }
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318 }
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319
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320
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321 bool VolumeImage::LayerFactory::GetExtent(double& x1,
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322 double& y1,
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323 double& x2,
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324 double& y2,
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325 const SliceGeometry& viewportSlice)
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326 {
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327 VolumeProjection projection;
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328 bool reverse;
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329
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330 if (that_.buffer_->GetWidth() == 0 ||
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331 that_.buffer_->GetHeight() == 0 ||
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332 that_.buffer_->GetDepth() == 0 ||
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333 !that_.DetectProjection(projection, reverse, viewportSlice))
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334 {
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335 return false;
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336 }
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337 else
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338 {
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339 Vector spacing = that_.GetVoxelDimensions(projection);
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340
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341 unsigned int width, height;
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342 that_.buffer_->GetSliceSize(width, height, projection);
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343
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344 // As the slices of the volumic image are arranged in a box,
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345 // we only consider one single reference slice (the one with index 0).
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346 const SliceGeometry& volumeSlice = that_.GetGeometryInternal(projection).GetSlice(0);
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347
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348 return FrameRenderer::ComputeFrameExtent(x1, y1, x2, y2,
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349 viewportSlice, volumeSlice,
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350 width, height,
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351 spacing[0], spacing[1]);
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352 }
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353 }
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354
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355
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356 ILayerRenderer* VolumeImage::LayerFactory::CreateLayerRenderer(const SliceGeometry& viewportSlice)
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357 {
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358 VolumeProjection projection;
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359 bool reverse;
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360
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361 if (that_.buffer_->GetWidth() == 0 ||
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362 that_.buffer_->GetHeight() == 0 ||
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363 that_.buffer_->GetDepth() == 0 ||
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364 !that_.DetectProjection(projection, reverse, viewportSlice))
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365 {
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366 return NULL;
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367 }
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368
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369 const ParallelSlices& geometry = that_.GetGeometryInternal(projection);
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370
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371 size_t closest;
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372 double distance;
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373
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374 const Vector spacing = that_.GetVoxelDimensions(projection);
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375 const double sliceThickness = spacing[2];
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376
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377 if (geometry.ComputeClosestSlice(closest, distance, viewportSlice.GetOrigin()) &&
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378 distance <= sliceThickness / 2.0)
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379 {
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380 bool isFullQuality;
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381
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382 if (projection == VolumeProjection_Axial &&
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383 that_.policy_.get() != NULL)
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384 {
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385 isFullQuality = that_.policy_->IsFullQualityAxial(closest);
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386 }
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387 else
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388 {
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389 isFullQuality = that_.IsLoadingComplete();
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390 }
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391
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392 std::auto_ptr<Orthanc::Image> frame;
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393 SliceGeometry frameSlice = geometry.GetSlice(closest);
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394
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395 {
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396 ImageBuffer3D::SliceReader reader(*that_.buffer_, projection, closest);
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397 frame.reset(Orthanc::Image::Clone(reader.GetAccessor()));
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398 }
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399
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400 return FrameRenderer::CreateRenderer(frame.release(),
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401 viewportSlice,
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402 frameSlice,
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403 *that_.referenceDataset_,
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404 spacing[0], spacing[1],
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405 isFullQuality);
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406 }
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407 else
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408 {
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409 return NULL;
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410 }
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411 }
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412 }
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