--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Inputs/OpenSlideLibrary.h	Sat Oct 22 21:48:33 2016 +0200
@@ -0,0 +1,112 @@
+/**
+ * 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/>.
+ **/
+
+
+#pragma once
+
+#include "../Orthanc/Plugins/Engine/SharedLibrary.h"
+#include "../Orthanc/Core/Images/ImageAccessor.h"
+
+#include <vector>
+
+namespace OrthancWSI
+{
+  class OpenSlideLibrary : public boost::noncopyable
+  {
+  private:
+    typedef void*   (*FunctionClose) (void*);
+    typedef int32_t (*FunctionGetLevelCount) (void*);
+    typedef void    (*FunctionGetLevelDimensions) (void*, int32_t, int64_t*, int64_t*);
+    typedef double  (*FunctionGetLevelDownsample) (void*, int32_t);
+    typedef void*   (*FunctionOpen) (const char*);
+    typedef void    (*FunctionReadRegion) (void*, uint32_t*, int64_t, int64_t, int32_t, int64_t, int64_t);
+
+    Orthanc::SharedLibrary      library_;
+    FunctionClose               close_;
+    FunctionGetLevelCount       getLevelCount_;
+    FunctionGetLevelDimensions  getLevelDimensions_;
+    FunctionGetLevelDownsample  getLevelDownsample_;
+    FunctionOpen                open_;
+    FunctionReadRegion          readRegion_;
+
+  public:
+    OpenSlideLibrary(const std::string& path);
+
+    static OpenSlideLibrary& GetInstance();
+
+    static void Initialize(const std::string& path);
+
+    static void Finalize();
+
+    class Image : public boost::noncopyable
+    {
+    private:
+      struct Level
+      {
+        unsigned int  width_;
+        unsigned int  height_;
+        double        downsample_;
+
+        Level();
+
+        Level(int64_t width,
+              int64_t height,
+              double downsample);
+      };
+
+      OpenSlideLibrary&   that_;
+      void*               handle_;
+      std::vector<Level>  levels_;
+
+      void Initialize(const std::string& path);
+
+      void Close();
+
+      void CheckLevel(unsigned int level) const;
+
+    public:
+      Image(OpenSlideLibrary& that,
+            const std::string& path);
+
+      Image(const std::string& path);
+
+      ~Image()
+      {
+        Close();
+      }
+
+      unsigned int GetLevelCount() const
+      {
+        return levels_.size();
+      }
+
+      double GetLevelDownsample(unsigned int level) const;
+
+      unsigned int GetLevelWidth(unsigned int level) const;
+
+      unsigned int GetLevelHeight(unsigned int level) const;
+
+      Orthanc::ImageAccessor* ReadRegion(unsigned int level,
+                                         uint64_t x,
+                                         uint64_t y,
+                                         unsigned int width,
+                                         unsigned int height);
+    };
+  };
+}