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annotate Framework/Radiography/RadiographyWindowingTracker.cpp @ 1042:08cdcadfab14

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allow using nearest neighbour interpolation while windowing
author Alain Mazy <alain@mazy.be>
date Wed, 09 Oct 2019 15:34:45 +0200
parents 4f2416d519b4
children 2d8ab34c8c91
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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 * Copyright (C) 2017-2019 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 Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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21
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22 #include "RadiographyWindowingTracker.h"
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23 #include "RadiographyWidget.h"
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24
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25 #include <Core/OrthancException.h>
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26
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27
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28 namespace OrthancStone
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29 {
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30 class RadiographyWindowingTracker::UndoRedoCommand : public UndoRedoStack::ICommand
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31 {
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32 private:
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33 RadiographyScene& scene_;
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34 float sourceCenter_;
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35 float sourceWidth_;
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36 float targetCenter_;
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37 float targetWidth_;
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38
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39 public:
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40 UndoRedoCommand(const RadiographyWindowingTracker& tracker) :
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41 scene_(tracker.scene_),
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42 sourceCenter_(tracker.sourceCenter_),
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43 sourceWidth_(tracker.sourceWidth_)
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44 {
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45 scene_.GetWindowingWithDefault(targetCenter_, targetWidth_);
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46 }
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47
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48 virtual void Undo() const
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49 {
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50 scene_.SetWindowing(sourceCenter_, sourceWidth_);
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51 }
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52
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53 virtual void Redo() const
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54 {
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55 scene_.SetWindowing(targetCenter_, targetWidth_);
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56 }
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57 };
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58
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59
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60 void RadiographyWindowingTracker::ComputeAxisEffect(int& deltaCenter,
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61 int& deltaWidth,
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62 int delta,
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63 Action actionNegative,
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64 Action actionPositive)
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65 {
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66 if (delta < 0)
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67 {
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68 switch (actionNegative)
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69 {
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70 case Action_IncreaseWidth:
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71 deltaWidth = -delta;
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72 break;
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73
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74 case Action_DecreaseWidth:
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75 deltaWidth = delta;
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76 break;
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77
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78 case Action_IncreaseCenter:
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79 deltaCenter = -delta;
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80 break;
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81
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82 case Action_DecreaseCenter:
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83 deltaCenter = delta;
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84 break;
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85
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86 default:
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87 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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88 }
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89 }
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90 else if (delta > 0)
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91 {
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92 switch (actionPositive)
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93 {
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94 case Action_IncreaseWidth:
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95 deltaWidth = delta;
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96 break;
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97
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98 case Action_DecreaseWidth:
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99 deltaWidth = -delta;
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100 break;
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101
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102 case Action_IncreaseCenter:
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103 deltaCenter = delta;
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104 break;
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105
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106 case Action_DecreaseCenter:
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107 deltaCenter = -delta;
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108 break;
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109
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110 default:
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111 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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112 }
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113 }
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114 }
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115
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116
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117 RadiographyWindowingTracker::RadiographyWindowingTracker(UndoRedoStack& undoRedoStack,
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118 RadiographyScene& scene,
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119 RadiographyWidget& widget,
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120 ImageInterpolation interpolationDuringTracking,
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121 int x,
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122 int y,
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123 Action leftAction,
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124 Action rightAction,
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125 Action upAction,
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126 Action downAction) :
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127 undoRedoStack_(undoRedoStack),
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128 scene_(scene),
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129 widget_(widget),
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130 initialWidgetInterpolation_(widget.GetInterpolation()),
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131 clickX_(x),
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132 clickY_(y),
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133 leftAction_(leftAction),
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134 rightAction_(rightAction),
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135 upAction_(upAction),
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136 downAction_(downAction)
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137 {
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138 scene_.GetWindowingWithDefault(sourceCenter_, sourceWidth_);
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139 widget_.SetInterpolation(interpolationDuringTracking);
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140
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141 float minValue, maxValue;
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142 scene.GetRange(minValue, maxValue);
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143
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144 assert(minValue <= maxValue);
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145
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146 float delta = (maxValue - minValue);
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147 strength_ = delta / 1000.0f; // 1px move will change the ww/wc by 0.1%
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148
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149 if (strength_ < 1)
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150 {
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151 strength_ = 1;
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152 }
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153 }
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154
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155
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156 void RadiographyWindowingTracker::Render(CairoContext& context,
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157 double zoom)
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158 {
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159 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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160 }
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161
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162
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163 void RadiographyWindowingTracker::MouseUp()
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164 {
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165 widget_.SetInterpolation(initialWidgetInterpolation_);
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166 undoRedoStack_.Add(new UndoRedoCommand(*this));
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167 }
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168
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169
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170 void RadiographyWindowingTracker::MouseMove(int displayX,
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171 int displayY,
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172 double sceneX,
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173 double sceneY,
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174 const std::vector<Deprecated::Touch>& displayTouches,
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175 const std::vector<Deprecated::Touch>& sceneTouches)
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176 {
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177 // This follows the behavior of the Osimis Web viewer:
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178 // https://bitbucket.org/osimis/osimis-webviewer-plugin/src/master/frontend/src/app/viewport/image-plugins/windowing-viewport-tool.class.js
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179
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180 static const float SCALE = 1.0;
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181
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182 int deltaCenter = 0;
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183 int deltaWidth = 0;
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184
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185 ComputeAxisEffect(deltaCenter, deltaWidth, displayX - clickX_, leftAction_, rightAction_);
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186 ComputeAxisEffect(deltaCenter, deltaWidth, displayY - clickY_, upAction_, downAction_);
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187
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188 float newCenter = sourceCenter_ + (deltaCenter / SCALE * strength_);
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189 float newWidth = sourceWidth_ + (deltaWidth / SCALE * strength_);
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190 scene_.SetWindowing(newCenter, newWidth);
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191 }
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192 }