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annotate Framework/SmartLoader.cpp @ 318:3a4ca166fafa am-2

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ImageAccessor refactoring + implemented Image Cache in SmartLoader
author am@osimis.io
date Mon, 08 Oct 2018 17:10:08 +0200
parents b66d13708f40
children a902a07769d4
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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) 2017-2018 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 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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20
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21
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22 #include "SmartLoader.h"
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23 #include "Layers/OrthancFrameLayerSource.h"
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24 #include "Messages/MessageForwarder.h"
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25 #include "Core/Images/Image.h"
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26 #include "Framework/Widgets/LayerWidget.h"
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27 #include "Framework/StoneException.h"
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28 #include "Framework/Layers/FrameRenderer.h"
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29
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30 namespace OrthancStone
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31 {
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32 enum CachedSliceStatus
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33 {
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34 CachedSliceStatus_Loading,
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35 CachedSliceStatus_Loaded
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36 };
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37
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38 class SmartLoader::CachedSlice : public LayerSourceBase
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39 {
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40 public:
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41 unsigned int sliceIndex_;
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42 std::auto_ptr<Slice> slice_;
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43 boost::shared_ptr<Orthanc::ImageAccessor> image_;
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44 SliceImageQuality effectiveQuality_;
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45 CachedSliceStatus status_;
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46
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47 public:
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48
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49 CachedSlice(MessageBroker& broker)
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50 : LayerSourceBase(broker)
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51 {}
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52
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53 virtual bool GetExtent(std::vector<Vector>& points,
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54 const CoordinateSystem3D& viewportSlice)
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55 {
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56 // TODO: viewportSlice is not used !!!!
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57 slice_->GetExtent(points);
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58 return true;
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59 }
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60
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61 virtual void ScheduleLayerCreation(const CoordinateSystem3D& viewportSlice)
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62 {
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63 // TODO: viewportSlice is not used !!!!
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64
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65 // it has already been loaded -> trigger the "layer ready" message immediately
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66 bool isFull = (effectiveQuality_ == SliceImageQuality_FullPng || effectiveQuality_ == SliceImageQuality_FullPam);
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67 std::auto_ptr<Orthanc::ImageAccessor> accessor(new Orthanc::ImageAccessor());
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68 image_->GetReadOnlyAccessor(*accessor);
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69 LayerSourceBase::NotifyLayerReady(FrameRenderer::CreateRenderer(accessor.release(), *slice_, isFull),
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70 slice_->GetGeometry(), false);
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71 }
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72
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73 CachedSlice* Clone() const
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74 {
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75 CachedSlice* output = new CachedSlice(broker_);
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76 output->sliceIndex_ = sliceIndex_;
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77 output->slice_.reset(slice_->Clone());
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78 output->image_ = image_;
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79 output->effectiveQuality_ = effectiveQuality_;
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80 output->status_ = status_;
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81
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82 return output;
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83 }
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84
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85 };
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86
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87
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88 SmartLoader::SmartLoader(MessageBroker& broker, OrthancApiClient& orthancApiClient) :
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89 IObservable(broker),
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90 IObserver(broker),
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91 imageQuality_(SliceImageQuality_FullPam),
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92 orthancApiClient_(orthancApiClient)
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93 {
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94 }
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95
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96 void SmartLoader::SetFrameInWidget(LayerWidget& layerWidget, size_t layerIndex, const std::string& instanceId, unsigned int frame)
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97 {
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98 // TODO: check if this frame has already been loaded or is already being loaded.
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99 // - if already loaded: create a "clone" that will emit the GeometryReady/ImageReady messages "immediately"
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100 // (it can not be immediate because Observers needs to register first and this is done after this method returns)
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101 // - if currently loading, we need to return an object that will observe the existing LayerSource and forward
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102 // the messages to its observables
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103 // in both cases, we must be carefull about objects lifecycle !!!
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104
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105 std::auto_ptr<ILayerSource> layerSource;
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106
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107 if (cachedSlices_.find(instanceId) != cachedSlices_.end() && cachedSlices_[instanceId]->status_ == CachedSliceStatus_Loaded)
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108 {
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109 layerSource.reset(cachedSlices_[instanceId]->Clone());
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110 }
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111 else
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112 {
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113 layerSource.reset(new OrthancFrameLayerSource(IObserver::broker_, orthancApiClient_));
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114 dynamic_cast<OrthancFrameLayerSource*>(layerSource.get())->SetImageQuality(imageQuality_);
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115 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::GeometryReadyMessage>(*this, &SmartLoader::OnLayerGeometryReady));
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116 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::ImageReadyMessage>(*this, &SmartLoader::OnImageReady));
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117 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::LayerReadyMessage>(*this, &SmartLoader::OnLayerReady));
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118 dynamic_cast<OrthancFrameLayerSource*>(layerSource.get())->LoadFrame(instanceId, frame);
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119 }
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121 // make sure that the widget registers the events before we trigger them
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122 if (layerWidget.GetLayerCount() == layerIndex)
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123 {
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124 layerWidget.AddLayer(layerSource.release());
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125 }
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126 else if (layerWidget.GetLayerCount() > layerIndex)
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127 {
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128 layerWidget.ReplaceLayer(layerIndex, layerSource.release());
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129 }
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130 else
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131 {
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132 throw StoneException(ErrorCode_CanOnlyAddOneLayerAtATime);
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133 }
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134
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135 SmartLoader::CachedSlice* cachedSlice = dynamic_cast<SmartLoader::CachedSlice*>(layerSource.get());
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136 if (cachedSlice != NULL)
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137 {
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138 cachedSlice->NotifyGeometryReady();
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139 }
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140
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141 }
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143
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144 void SmartLoader::LoadStudyList()
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145 {
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146 // orthancApiClient_.ScheduleGetJsonRequest("/studies");
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147 }
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148
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149 void PreloadStudy(const std::string studyId)
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150 {
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151 /* TODO */
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152 }
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153
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154 void PreloadSeries(const std::string seriesId)
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155 {
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156 /* TODO */
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157 }
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158
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159
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160 void SmartLoader::OnLayerGeometryReady(const ILayerSource::GeometryReadyMessage& message)
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161 {
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162 OrthancFrameLayerSource& source = dynamic_cast<OrthancFrameLayerSource&>(message.origin_);
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163 // save the slice
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164 const Slice& slice = source.GetSlice(0); // TODO handle GetSliceCount()
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165 std::string instanceId = slice.GetOrthancInstanceId();
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166
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167 CachedSlice* cachedSlice = new CachedSlice(IObserver::broker_);
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168 cachedSlice->slice_.reset(slice.Clone());
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169 cachedSlice->effectiveQuality_ = source.GetImageQuality();
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170 cachedSlice->status_ = CachedSliceStatus_Loading;
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171
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172 cachedSlices_[instanceId] = boost::shared_ptr<CachedSlice>(cachedSlice);
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173
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174 // re-emit original Layer message to observers
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175 EmitMessage(message);
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176 }
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177
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178 void SmartLoader::OnImageReady(const ILayerSource::ImageReadyMessage& message)
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179 {
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180 OrthancFrameLayerSource& source = dynamic_cast<OrthancFrameLayerSource&>(message.origin_);
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181
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182 // save the slice
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183 const Slice& slice = source.GetSlice(0); // TODO handle GetSliceCount() ?
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184 std::string instanceId = slice.GetOrthancInstanceId();
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185
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186 boost::shared_ptr<CachedSlice> cachedSlice(new CachedSlice(IObserver::broker_));
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187 cachedSlice->image_ = message.image_;
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188 cachedSlice->effectiveQuality_ = message.imageQuality_;
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189 cachedSlice->slice_.reset(message.slice_.Clone());
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190 cachedSlice->status_ = CachedSliceStatus_Loaded;
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191
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192 cachedSlices_[instanceId] = cachedSlice;
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193
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194 // re-emit original Layer message to observers
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195 EmitMessage(message);
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196 }
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197
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198 void SmartLoader::OnLayerReady(const ILayerSource::LayerReadyMessage& message)
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199 {
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200 // re-emit original Layer message to observers
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201 EmitMessage(message);
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202 }
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203
260
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204 }