--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancCppClient/Instance.cpp	Tue Jul 16 09:08:09 2013 +0200
@@ -0,0 +1,224 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2013 Medical Physics Department, CHU of Liege,
+ * Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "Instance.h"
+
+#include "OrthancConnection.h"
+#include "../Core/OrthancException.h"
+
+#include <boost/lexical_cast.hpp>
+
+namespace OrthancClient
+{
+  void Instance::DownloadImage()
+  {
+    if (reader_.get() == NULL)
+    {
+      const char* suffix;
+      switch (mode_)
+      {
+        case Orthanc::ImageExtractionMode_Preview:
+          suffix = "preview";
+          break;
+          
+        case Orthanc::ImageExtractionMode_UInt8:
+          suffix = "image-uint8";
+          break;
+          
+        case Orthanc::ImageExtractionMode_UInt16:
+          suffix = "image-uint16";
+          break;
+          
+        case Orthanc::ImageExtractionMode_Int16:
+          suffix = "image-int16";
+          break;
+          
+        default:
+          throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
+      }
+
+      Orthanc::HttpClient client(connection_.GetHttpClient());
+      client.SetUrl(connection_.GetOrthancUrl() +  "/instances/" + id_ + "/" + suffix);
+      std::string png;
+
+      if (!client.Apply(png))
+      {
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
+      }
+     
+      reader_.reset(new Orthanc::PngReader);
+      reader_->ReadFromMemory(png);
+    }
+  }
+
+  Instance::Instance(const OrthancConnection& connection,
+                     const std::string& id) :
+    connection_(connection),
+    id_(id),
+    mode_(Orthanc::ImageExtractionMode_Int16)
+  {
+    Orthanc::HttpClient client(connection_.GetHttpClient());
+            
+    client.SetUrl(connection_.GetOrthancUrl() + "/instances/" + id_ + "/simplified-tags");
+    Json::Value v;
+    if (!client.Apply(tags_))
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_NetworkProtocol);
+    }
+  }
+
+  std::string Instance::GetTagAsString(const char* tag)
+  {
+    if (tags_.isMember(tag))
+    {
+      return tags_[tag].asString();
+    }
+    else
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem);
+    }
+  }
+
+  float Instance::GetTagAsFloat(const char* tag)
+  {
+    std::string value = GetTagAsString(tag);
+
+    try
+    {
+      return boost::lexical_cast<float>(value);
+    }
+    catch (boost::bad_lexical_cast)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+    }
+  }
+
+  int Instance::GetTagAsInt(const char* tag)
+  {
+    std::string value = GetTagAsString(tag);
+
+    try
+    {
+      return boost::lexical_cast<int>(value);
+    }
+    catch (boost::bad_lexical_cast)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+    }
+  }
+
+  unsigned int Instance::GetWidth()
+  {
+    DownloadImage();
+    return reader_->GetWidth();
+  }
+
+  unsigned int Instance::GetHeight() 
+  {
+    DownloadImage();
+    return reader_->GetHeight();
+  }
+
+  unsigned int Instance::GetPitch()
+  {
+    DownloadImage();
+    return reader_->GetPitch();
+  }
+
+  Orthanc::PixelFormat Instance::GetPixelFormat()
+  {
+    DownloadImage();
+    return reader_->GetFormat();
+  }
+
+  const void* Instance::GetBuffer()
+  {
+    DownloadImage();
+    return reader_->GetBuffer();
+  }
+
+  const void* Instance::GetBuffer(unsigned int y)
+  {
+    DownloadImage();
+    return reader_->GetBuffer(y);
+  }
+
+  void Instance::DiscardImage()
+  {
+    reader_.reset();
+  }
+
+
+  void Instance::SetImageExtractionMode(Orthanc::ImageExtractionMode mode)
+  {
+    if (mode_ == mode)
+    {
+      return;
+    }
+
+    DiscardImage();
+    mode_ = mode;
+  }
+
+
+  void Instance::SplitVectorOfFloats(std::vector<float>& target,
+                                     const char* tag)
+  {
+    const std::string value = GetTagAsString(tag);
+
+    target.clear();
+
+    try
+    {
+      std::string tmp;
+      for (size_t i = 0; i < value.size(); i++)
+      {
+        if (value[i] == '\\')
+        {
+          target.push_back(boost::lexical_cast<float>(tmp));
+          tmp.clear();
+        }
+        else
+        {
+          tmp.push_back(value[i]);
+        }
+      }
+
+      target.push_back(boost::lexical_cast<float>(tmp));
+    }
+    catch (boost::bad_lexical_cast)
+    {
+      // Unable to parse the Image Orientation Patient.
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
+    }
+  }
+}