--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Loaders/OrthancSeriesVolumeProgressiveLoader.h	Tue May 28 21:16:39 2019 +0200
@@ -0,0 +1,134 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "../Messages/IObservable.h"
+#include "../Messages/IObserver.h"
+#include "../Oracle/GetOrthancImageCommand.h"
+#include "../Oracle/GetOrthancWebViewerJpegCommand.h"
+#include "../Oracle/IOracle.h"
+#include "../Oracle/OrthancRestApiCommand.h"
+#include "../Toolbox/SlicesSorter.h"
+#include "../Volumes/DicomVolumeImage.h"
+#include "../Volumes/IVolumeSlicer.h"
+#include "IFetchingItemsSorter.h"
+#include "IFetchingStrategy.h"
+
+#include <boost/shared_ptr.hpp>
+
+namespace OrthancStone
+{
+  /**
+    This class is used to manage the progressive loading of a volume that
+    is stored in a Dicom series.
+  */
+  class OrthancSeriesVolumeProgressiveLoader : 
+    public IObserver,
+    public IObservable,
+    public IVolumeSlicer
+  {
+  private:
+    static const unsigned int LOW_QUALITY = 0;
+    static const unsigned int MIDDLE_QUALITY = 1;
+    static const unsigned int BEST_QUALITY = 2;
+    
+    class ExtractedSlice;
+    
+    /** Helper class internal to OrthancSeriesVolumeProgressiveLoader */
+    class SeriesGeometry : public boost::noncopyable
+    {
+    private:
+      void CheckSlice(size_t index,
+                      const DicomInstanceParameters& reference) const;
+    
+      void CheckVolume() const;
+
+      void Clear();
+
+      void CheckSliceIndex(size_t index) const;
+
+      std::auto_ptr<VolumeImageGeometry>     geometry_;
+      std::vector<DicomInstanceParameters*>  slices_;
+      std::vector<uint64_t>                  slicesRevision_;
+
+    public:
+      ~SeriesGeometry()
+      {
+        Clear();
+      }
+
+      void ComputeGeometry(SlicesSorter& slices);
+
+      bool HasGeometry() const
+      {
+        return geometry_.get() != NULL;
+      }
+
+      const VolumeImageGeometry& GetImageGeometry() const;
+
+      const DicomInstanceParameters& GetSliceParameters(size_t index) const;
+
+      uint64_t GetSliceRevision(size_t index) const;
+
+      void IncrementSliceRevision(size_t index);
+    };
+
+
+    void ScheduleNextSliceDownload();
+
+    void LoadGeometry(const OrthancRestApiCommand::SuccessMessage& message);
+
+    void SetSliceContent(unsigned int sliceIndex,
+                         const Orthanc::ImageAccessor& image,
+                         unsigned int quality);
+
+    void LoadBestQualitySliceContent(const GetOrthancImageCommand::SuccessMessage& message);
+
+    void LoadJpegSliceContent(const GetOrthancWebViewerJpegCommand::SuccessMessage& message);
+
+    IOracle&                                       oracle_;
+    bool                                           active_;
+    unsigned int                                   simultaneousDownloads_;
+    SeriesGeometry                                 seriesGeometry_;
+    boost::shared_ptr<DicomVolumeImage>            volume_;
+    std::auto_ptr<IFetchingItemsSorter::IFactory>  sorter_;
+    std::auto_ptr<IFetchingStrategy>               strategy_;
+    std::vector<unsigned int>                      slicesQuality_;
+
+
+  public:
+    OrthancSeriesVolumeProgressiveLoader(const boost::shared_ptr<DicomVolumeImage>& volume,
+                                         IOracle& oracle,
+                                         IObservable& oracleObservable);
+
+    void SetSimultaneousDownloads(unsigned int count);
+
+    void LoadSeries(const std::string& seriesId);
+
+    /**
+    When a slice is requested, the strategy algorithm (that defines the 
+    sequence of resources to be loaded from the server) is modified to 
+    take into account this request (this is done in the ExtractedSlice ctor)
+    */
+    virtual IExtractedSlice* ExtractSlice(const CoordinateSystem3D& cuttingPlane);
+  };
+}