--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/Loaders/LoaderCache.h	Tue Jul 07 16:21:02 2020 +0200
@@ -0,0 +1,106 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 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 "../Volumes/DicomVolumeImageMPRSlicer.h"
+#include "OrthancSeriesVolumeProgressiveLoader.h"
+#include "OrthancMultiframeVolumeLoader.h"
+#include "DicomStructureSetLoader.h"
+
+#include <boost/shared_ptr.hpp>
+
+#include <map>
+#include <string>
+#include <vector>
+
+namespace OrthancStone
+{
+  class ILoadersContext;
+}
+
+namespace OrthancStone
+{
+  class LoaderCache
+  {
+  public:
+
+    virtual ~LoaderCache() {}
+
+    /**
+    By default, the CT loader in loader cache will only download the highest quality slices.
+    If you pass true for useCtProgressiveQuality, jpeg (50/100 quality), then jpeg (90/100 quality) 
+    then eventually uncompressed 16-bit images will be loaded. 
+    */
+    LoaderCache(OrthancStone::ILoadersContext& loadersContext, bool useCtProgressiveQuality = false);
+
+    boost::shared_ptr<OrthancSeriesVolumeProgressiveLoader>
+      GetSeriesVolumeProgressiveLoader      (std::string seriesUuid);
+    
+    boost::shared_ptr<OrthancStone::DicomVolumeImageMPRSlicer>
+      GetMultiframeDicomVolumeImageMPRSlicer(std::string instanceUuid);
+
+    boost::shared_ptr<OrthancMultiframeVolumeLoader>
+      GetMultiframeVolumeLoader(std::string instanceUuid);
+
+    /**
+    The DicomStructureSetLoader instances are stored in a map and indexed
+    by a key built from instanceUuid and uniqueKey.
+
+    If instanceUuid and uniqueKey correspond to an already existing loader, it is returned.
+
+    Please note that initiallyVisibleStructures is only used if the call results in the creation
+    of a new loader. In that case, the value is passed to the constructor.
+    */
+    boost::shared_ptr<DicomStructureSetLoader>
+      GetDicomStructureSetLoader(
+        std::string instanceUuid,
+        const std::vector<std::string>& initiallyVisibleStructures,
+        const std::string& uniqueKey = "");
+
+    std::string BuildDicomStructureSetLoaderKey(
+        const std::string& instanceUuid,
+        const std::string& uniqueKey = "");
+
+    void ClearCache();
+
+    /**
+    Service method static and exposed for unit tests.
+    */
+    static void NormalizeUuid(std::string& uuid);
+
+  protected:
+    
+    void DebugDisplayObjRefCounts();
+
+    OrthancStone::ILoadersContext& loadersContext_;
+    bool                           useCtProgressiveQuality_;
+
+    std::map<std::string, boost::shared_ptr<OrthancSeriesVolumeProgressiveLoader> >
+      seriesVolumeProgressiveLoaders_;
+    std::map<std::string, boost::shared_ptr<OrthancMultiframeVolumeLoader> >
+      multiframeVolumeLoaders_;
+    std::map<std::string, boost::shared_ptr<OrthancStone::DicomVolumeImageMPRSlicer> >
+      dicomVolumeImageMPRSlicers_;
+    std::map<std::string, boost::shared_ptr<DicomStructureSetLoader> >
+      dicomStructureSetLoaders_;
+  };
+}
+