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annotate Framework/SmartLoader.cpp @ 381:19bd222283ae

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uncoupling LayerReadyMessage from the creation of the renderer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 06 Nov 2018 15:36:06 +0100
parents ba5ad93f935a
children 20f149669c1f
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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 #include "Core/Logging.h"
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30
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31 namespace OrthancStone
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32 {
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33 enum CachedSliceStatus
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34 {
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35 CachedSliceStatus_ScheduledToLoad,
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36 CachedSliceStatus_GeometryLoaded,
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37 CachedSliceStatus_ImageLoaded
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38 };
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39
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40 class SmartLoader::CachedSlice : public LayerSourceBase
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41 {
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42 public:
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43 class RendererFactory : public LayerReadyMessage::IRendererFactory
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44 {
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45 private:
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46 const CachedSlice& that_;
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47
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48 public:
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49 RendererFactory(const CachedSlice& that) :
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50 that_(that)
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51 {
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52 }
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53
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54 virtual ILayerRenderer* CreateRenderer() const
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55 {
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56 bool isFull = (that_.effectiveQuality_ == SliceImageQuality_FullPng ||
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57 that_.effectiveQuality_ == SliceImageQuality_FullPam);
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58
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59 return FrameRenderer::CreateRenderer(*that_.image_, *that_.slice_, isFull);
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60 }
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61 };
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62
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63 unsigned int sliceIndex_;
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64 std::auto_ptr<Slice> slice_;
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65 boost::shared_ptr<Orthanc::ImageAccessor> image_;
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66 SliceImageQuality effectiveQuality_;
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67 CachedSliceStatus status_;
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68
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69 public:
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70 CachedSlice(MessageBroker& broker) :
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71 LayerSourceBase(broker)
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72 {
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73 }
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74
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75 virtual ~CachedSlice()
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76 {
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77 }
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78
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79 virtual bool GetExtent(std::vector<Vector>& points,
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80 const CoordinateSystem3D& viewportSlice)
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81 {
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82 // TODO: viewportSlice is not used !!!!
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83 slice_->GetExtent(points);
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84 return true;
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85 }
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86
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87 virtual void ScheduleLayerCreation(const CoordinateSystem3D& viewportSlice)
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88 {
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89 // TODO: viewportSlice is not used !!!!
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90
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91 // it has already been loaded -> trigger the "layer ready" message immediately otherwise, do nothing now. The LayerReady will be triggered
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92 // once the LayerSource is ready
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93 if (status_ == CachedSliceStatus_ImageLoaded)
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94 {
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95 LOG(WARNING) << "ScheduleLayerCreation for CachedSlice (image is loaded): " << slice_->GetOrthancInstanceId();
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96
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97 RendererFactory factory(*this);
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98 LayerSourceBase::NotifyLayerReady(factory, slice_->GetGeometry());
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99 }
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100 else
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101 {
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102 LOG(WARNING) << "ScheduleLayerCreation for CachedSlice (image is not loaded yet): " << slice_->GetOrthancInstanceId();
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103 }
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104 }
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105
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106 CachedSlice* Clone() const
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107 {
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108 CachedSlice* output = new CachedSlice(broker_);
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109 output->sliceIndex_ = sliceIndex_;
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110 output->slice_.reset(slice_->Clone());
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111 output->image_ = image_;
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112 output->effectiveQuality_ = effectiveQuality_;
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113 output->status_ = status_;
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114
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115 return output;
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116 }
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117
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118 };
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119
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120
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121 SmartLoader::SmartLoader(MessageBroker& broker,
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122 OrthancApiClient& orthancApiClient) :
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123 IObservable(broker),
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124 IObserver(broker),
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125 imageQuality_(SliceImageQuality_FullPam),
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126 orthancApiClient_(orthancApiClient)
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127 {
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128 }
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129
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130 void SmartLoader::SetFrameInWidget(LayerWidget& layerWidget,
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131 size_t layerIndex,
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132 const std::string& instanceId,
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133 unsigned int frame)
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134 {
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135 // TODO: check if this frame has already been loaded or is already being loaded.
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136 // - if already loaded: create a "clone" that will emit the GeometryReady/ImageReady messages "immediately"
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137 // (it can not be immediate because Observers needs to register first and this is done after this method returns)
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138 // - if currently loading, we need to return an object that will observe the existing LayerSource and forward
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139 // the messages to its observables
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140 // in both cases, we must be carefull about objects lifecycle !!!
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141
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142 std::auto_ptr<ILayerSource> layerSource;
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143 std::string sliceKeyId = instanceId + ":" + boost::lexical_cast<std::string>(frame);
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144 SmartLoader::CachedSlice* cachedSlice = NULL;
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145
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146 if (cachedSlices_.find(sliceKeyId) != cachedSlices_.end()) // && cachedSlices_[sliceKeyId]->status_ == CachedSliceStatus_Loaded)
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147 {
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148 layerSource.reset(cachedSlices_[sliceKeyId]->Clone());
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149 cachedSlice = dynamic_cast<SmartLoader::CachedSlice*>(layerSource.get());
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150 }
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151 else
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152 {
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153 layerSource.reset(new OrthancFrameLayerSource(IObserver::broker_, orthancApiClient_));
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154 dynamic_cast<OrthancFrameLayerSource*>(layerSource.get())->SetImageQuality(imageQuality_);
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155 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::GeometryReadyMessage>(*this, &SmartLoader::OnLayerGeometryReady));
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156 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::ImageReadyMessage>(*this, &SmartLoader::OnImageReady));
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157 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::LayerReadyMessage>(*this, &SmartLoader::OnLayerReady));
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158 dynamic_cast<OrthancFrameLayerSource*>(layerSource.get())->LoadFrame(instanceId, frame);
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159 }
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161 // make sure that the widget registers the events before we trigger them
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162 if (layerWidget.GetLayerCount() == layerIndex)
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163 {
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164 layerWidget.AddLayer(layerSource.release());
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165 }
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166 else if (layerWidget.GetLayerCount() > layerIndex)
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167 {
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168 layerWidget.ReplaceLayer(layerIndex, layerSource.release());
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169 }
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170 else
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171 {
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172 throw StoneException(ErrorCode_CanOnlyAddOneLayerAtATime);
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173 }
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174
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175 if (cachedSlice != NULL)
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176 {
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177 cachedSlice->NotifyGeometryReady();
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178 }
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179
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180 }
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181
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182 void SmartLoader::PreloadSlice(const std::string instanceId,
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183 unsigned int frame)
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184 {
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185 // TODO: reactivate -> need to be able to ScheduleLayerLoading in ILayerSource without calling ScheduleLayerCreation
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186 return;
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187 // TODO: check if it is already in the cache
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188
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189
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190
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191 // create the slice in the cache with "empty" data
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192 boost::shared_ptr<CachedSlice> cachedSlice(new CachedSlice(IObserver::broker_));
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193 cachedSlice->slice_.reset(new Slice(instanceId, frame));
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194 cachedSlice->status_ = CachedSliceStatus_ScheduledToLoad;
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195 std::string sliceKeyId = instanceId + ":" + boost::lexical_cast<std::string>(frame);
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196
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197 LOG(WARNING) << "Will preload: " << sliceKeyId;
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198
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199 cachedSlices_[sliceKeyId] = boost::shared_ptr<CachedSlice>(cachedSlice);
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200
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201 std::auto_ptr<ILayerSource> layerSource(new OrthancFrameLayerSource(IObserver::broker_, orthancApiClient_));
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202
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203 dynamic_cast<OrthancFrameLayerSource*>(layerSource.get())->SetImageQuality(imageQuality_);
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204 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::GeometryReadyMessage>(*this, &SmartLoader::OnLayerGeometryReady));
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205 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::ImageReadyMessage>(*this, &SmartLoader::OnImageReady));
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206 layerSource->RegisterObserverCallback(new Callable<SmartLoader, ILayerSource::LayerReadyMessage>(*this, &SmartLoader::OnLayerReady));
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207 dynamic_cast<OrthancFrameLayerSource*>(layerSource.get())->LoadFrame(instanceId, frame);
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208
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209 // keep a ref to the LayerSource until the slice is fully loaded and saved to cache
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210 preloadingInstances_[sliceKeyId] = boost::shared_ptr<ILayerSource>(layerSource.release());
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211 }
260
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212
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213
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214 // void PreloadStudy(const std::string studyId)
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215 // {
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216 // /* TODO */
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217 // }
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218
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219 // void PreloadSeries(const std::string seriesId)
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220 // {
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221 // /* TODO */
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222 // }
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223
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224
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225 void SmartLoader::OnLayerGeometryReady(const ILayerSource::GeometryReadyMessage& message)
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226 {
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227 OrthancFrameLayerSource& source = dynamic_cast<OrthancFrameLayerSource&>(message.GetOrigin());
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228
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229 // save/replace the slice in cache
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230 const Slice& slice = source.GetSlice(0); // TODO handle GetSliceCount()
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231 std::string sliceKeyId = (slice.GetOrthancInstanceId() + ":" +
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232 boost::lexical_cast<std::string>(slice.GetFrame()));
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233
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234 LOG(WARNING) << "Geometry ready: " << sliceKeyId;
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235
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236 boost::shared_ptr<CachedSlice> cachedSlice(new CachedSlice(IObserver::broker_));
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237 cachedSlice->slice_.reset(slice.Clone());
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238 cachedSlice->effectiveQuality_ = source.GetImageQuality();
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239 cachedSlice->status_ = CachedSliceStatus_GeometryLoaded;
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240
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241 cachedSlices_[sliceKeyId] = boost::shared_ptr<CachedSlice>(cachedSlice);
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242
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243 // re-emit original Layer message to observers
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244 EmitMessage(message);
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245 }
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246
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247
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248 void SmartLoader::OnImageReady(const ILayerSource::ImageReadyMessage& message)
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249 {
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250 OrthancFrameLayerSource& source = dynamic_cast<OrthancFrameLayerSource&>(message.GetOrigin());
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251
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252 // save/replace the slice in cache
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253 const Slice& slice = source.GetSlice(0); // TODO handle GetSliceCount() ?
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254 std::string sliceKeyId = (slice.GetOrthancInstanceId() + ":" +
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255 boost::lexical_cast<std::string>(slice.GetFrame()));
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256
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257 LOG(WARNING) << "Image ready: " << sliceKeyId;
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258
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259 boost::shared_ptr<CachedSlice> cachedSlice(new CachedSlice(IObserver::broker_));
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260 cachedSlice->image_.reset(Orthanc::Image::Clone(message.GetImage()));
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261 cachedSlice->effectiveQuality_ = message.GetImageQuality();
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262 cachedSlice->slice_.reset(message.GetSlice().Clone());
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263 cachedSlice->status_ = CachedSliceStatus_ImageLoaded;
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264
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265 cachedSlices_[sliceKeyId] = cachedSlice;
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266
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267 // re-emit original Layer message to observers
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268 EmitMessage(message);
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269 }
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270
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271
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272 void SmartLoader::OnLayerReady(const ILayerSource::LayerReadyMessage& message)
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273 {
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274 OrthancFrameLayerSource& source = dynamic_cast<OrthancFrameLayerSource&>(message.GetOrigin());
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275 const Slice& slice = source.GetSlice(0); // TODO handle GetSliceCount() ?
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276 std::string sliceKeyId = (slice.GetOrthancInstanceId() + ":" +
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277 boost::lexical_cast<std::string>(slice.GetFrame()));
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278
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279 LOG(WARNING) << "Layer ready: " << sliceKeyId;
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280
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281 // remove the slice from the preloading slices now that it has been fully loaded and it is referenced in the cache
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282 if (preloadingInstances_.find(sliceKeyId) != preloadingInstances_.end())
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283 {
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284 preloadingInstances_.erase(sliceKeyId);
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285 }
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286
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287 // re-emit original Layer message to observers
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288 EmitMessage(message);
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289 }
260
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290 }