--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Inputs/DicomPyramidLevel.cpp	Sat Oct 22 21:48:33 2016 +0200
@@ -0,0 +1,128 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, 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/>.
+ **/
+
+
+#include "DicomPyramidLevel.h"
+
+#include "../Orthanc/Core/Logging.h"
+#include "../Orthanc/Core/OrthancException.h"
+
+#include <boost/lexical_cast.hpp>
+
+namespace OrthancWSI
+{
+  void DicomPyramidLevel::RegisterFrame(const DicomPyramidInstance& instance,
+                                        unsigned int frame)
+  {
+    TileLocation location(instance.GetFrameLocationX(frame), 
+                          instance.GetFrameLocationY(frame));
+
+    if (tiles_.find(location) != tiles_.end())
+    {
+      LOG(ERROR) << "Tile with location (" << location.first << "," 
+                 << location.second << ") is indexed twice in level of size "
+                 << totalWidth_ << "x" << totalHeight_;
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+    }
+
+    tiles_[location] = std::make_pair(&instance, frame);
+  }
+
+
+  bool DicomPyramidLevel::LookupTile(TileContent& tile,
+                                     unsigned int tileX,
+                                     unsigned int tileY) const
+  {
+    Tiles::const_iterator found = tiles_.find(std::make_pair(tileX, tileY));
+    if (found == tiles_.end())
+    {
+      return false;
+    }
+    else
+    {
+      tile = found->second;
+      return true;
+    }
+  }
+
+
+  DicomPyramidLevel::DicomPyramidLevel(const DicomPyramidInstance& instance) :
+    totalWidth_(instance.GetTotalWidth()),
+    totalHeight_(instance.GetTotalHeight()),
+    tileWidth_(instance.GetTileWidth()),
+    tileHeight_(instance.GetTileHeight())
+  {
+    if (totalWidth_ == 0 ||
+        totalHeight_ == 0)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+      
+    AddInstance(instance);
+  }
+
+
+  void DicomPyramidLevel::AddInstance(const DicomPyramidInstance& instance)
+  {
+    if (instance.GetTotalWidth() != totalWidth_ ||
+        instance.GetTotalHeight() != totalHeight_ ||
+        instance.GetTileWidth() != tileWidth_ ||
+        instance.GetTileHeight() != tileHeight_)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize);
+    }
+
+    instances_.push_back(&instance);
+
+    for (size_t frame = 0; frame < instance.GetFrameCount(); frame++)
+    {
+      RegisterFrame(instance, frame);
+    }
+  }
+
+
+  bool DicomPyramidLevel::DownloadRawTile(ImageCompression& compression /* out */,
+                                          Orthanc::PixelFormat& format /* out */,
+                                          std::string& raw /* out */,
+                                          IOrthancConnection& orthanc,
+                                          unsigned int tileX,
+                                          unsigned int tileY) const
+  {
+    TileContent tile;
+    if (LookupTile(tile, tileX, tileY))
+    {
+      assert(tile.first != NULL);
+      const DicomPyramidInstance& instance = *tile.first;
+
+      std::string uri = ("/instances/" + instance.GetInstanceId() + 
+                         "/frames/" + boost::lexical_cast<std::string>(tile.second) + "/raw");
+
+      orthanc.RestApiGet(raw, uri);
+
+      compression = instance.GetImageCompression();
+      format = instance.GetPixelFormat();
+
+      return true;
+    }
+    else
+    {
+      return false;
+    }
+  }
+}