--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Samples/Common/RtViewer.cpp	Mon Apr 27 10:01:03 2020 +0200
@@ -0,0 +1,923 @@
+/**
+ * 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/>.
+ **/
+
+#include "RtViewer.h"
+
+#include <stdio.h>
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/make_shared.hpp>
+
+#include <Core/Images/Image.h>
+#include <Core/Images/ImageProcessing.h>
+#include <Core/Images/PngWriter.h>
+#include <Core/Logging.h>
+#include <Core/OrthancException.h>
+
+#include <Framework/OpenGL/SdlOpenGLContext.h>
+#include <Framework/StoneInitialization.h>
+
+#include <Framework/Scene2D/CairoCompositor.h>
+#include <Framework/Scene2D/ColorTextureSceneLayer.h>
+#include <Framework/Scene2D/OpenGLCompositor.h>
+#include <Framework/Scene2D/PanSceneTracker.h>
+#include <Framework/Scene2D/ZoomSceneTracker.h>
+#include <Framework/Scene2D/RotateSceneTracker.h>
+
+#include <Framework/Scene2DViewport/UndoStack.h>
+#include <Framework/Scene2DViewport/CreateLineMeasureTracker.h>
+#include <Framework/Scene2DViewport/CreateAngleMeasureTracker.h>
+#include <Framework/Scene2DViewport/IFlexiblePointerTracker.h>
+#include <Framework/Scene2DViewport/MeasureTool.h>
+#include <Framework/Scene2DViewport/PredeclaredTypes.h>
+#include <Framework/Volumes/VolumeSceneLayerSource.h>
+
+#include <Framework/Oracle/GetOrthancWebViewerJpegCommand.h>
+#include <Framework/Oracle/ThreadedOracle.h>
+#include <Framework/Scene2D/GrayscaleStyleConfigurator.h>
+#include <Framework/Scene2D/LookupTableStyleConfigurator.h>
+#include <Framework/Volumes/DicomVolumeImageMPRSlicer.h>
+#include <Framework/StoneException.h>
+
+namespace OrthancStone
+{
+  const char* RtViewerGuiToolToString(size_t i)
+  {
+    static const char* descs[] = {
+      "RtViewerGuiTool_Rotate",
+      "RtViewerGuiTool_Pan",
+      "RtViewerGuiTool_Zoom",
+      "RtViewerGuiTool_LineMeasure",
+      "RtViewerGuiTool_CircleMeasure",
+      "RtViewerGuiTool_AngleMeasure",
+      "RtViewerGuiTool_EllipseMeasure",
+      "RtViewerGuiTool_LAST"
+    };
+    if (i >= RtViewerGuiTool_LAST)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, "Wrong tool index");
+    }
+    return descs[i];
+  }
+
+  void RtViewerApp::SelectNextTool()
+  {
+    currentTool_ = static_cast<RtViewerGuiTool>(currentTool_ + 1);
+    if (currentTool_ == RtViewerGuiTool_LAST)
+      currentTool_ = static_cast<RtViewerGuiTool>(0);;
+    printf("Current tool is now: %s\n", RtViewerGuiToolToString(currentTool_));
+  }
+
+  void RtViewerApp::DisplayInfoText()
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    // do not try to use stuff too early!
+    OrthancStone::ICompositor& compositor = lock->GetCompositor();
+
+    std::stringstream msg;
+
+    for (std::map<std::string, std::string>::const_iterator kv = infoTextMap_.begin();
+         kv != infoTextMap_.end(); ++kv)
+    {
+      msg << kv->first << " : " << kv->second << std::endl;
+    }
+    std::string msgS = msg.str();
+
+    TextSceneLayer* layerP = NULL;
+    if (scene.HasLayer(FIXED_INFOTEXT_LAYER_ZINDEX))
+    {
+      TextSceneLayer& layer = dynamic_cast<TextSceneLayer&>(
+        scene.GetLayer(FIXED_INFOTEXT_LAYER_ZINDEX));
+      layerP = &layer;
+    }
+    else
+    {
+      std::unique_ptr<TextSceneLayer> layer(new TextSceneLayer);
+      layerP = layer.get();
+      layer->SetColor(0, 255, 0);
+      layer->SetFontIndex(1);
+      layer->SetBorder(20);
+      layer->SetAnchor(BitmapAnchor_TopLeft);
+      //layer->SetPosition(0,0);
+      scene.SetLayer(FIXED_INFOTEXT_LAYER_ZINDEX, layer.release());
+    }
+    // position the fixed info text in the upper right corner
+    layerP->SetText(msgS.c_str());
+    double cX = compositor.GetCanvasWidth() * (-0.5);
+    double cY = compositor.GetCanvasHeight() * (-0.5);
+    scene.GetCanvasToSceneTransform().Apply(cX, cY);
+    layerP->SetPosition(cX, cY);
+    lock->Invalidate();
+  }
+
+  void RtViewerApp::DisplayFloatingCtrlInfoText(const PointerEvent& e)
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    ScenePoint2D p = e.GetMainPosition().Apply(scene.GetCanvasToSceneTransform());
+
+    char buf[128];
+    sprintf(buf, "S:(%0.02f,%0.02f) C:(%0.02f,%0.02f)",
+            p.GetX(), p.GetY(),
+            e.GetMainPosition().GetX(), e.GetMainPosition().GetY());
+
+    if (scene.HasLayer(FLOATING_INFOTEXT_LAYER_ZINDEX))
+    {
+      TextSceneLayer& layer =
+        dynamic_cast<TextSceneLayer&>(scene.GetLayer(FLOATING_INFOTEXT_LAYER_ZINDEX));
+      layer.SetText(buf);
+      layer.SetPosition(p.GetX(), p.GetY());
+    }
+    else
+    {
+      std::unique_ptr<TextSceneLayer> layer(new TextSceneLayer);
+      layer->SetColor(0, 255, 0);
+      layer->SetText(buf);
+      layer->SetBorder(20);
+      layer->SetAnchor(BitmapAnchor_BottomCenter);
+      layer->SetPosition(p.GetX(), p.GetY());
+      scene.SetLayer(FLOATING_INFOTEXT_LAYER_ZINDEX, layer.release());
+    }
+  }
+
+  void RtViewerApp::HideInfoText()
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    scene.DeleteLayer(FLOATING_INFOTEXT_LAYER_ZINDEX);
+  }
+
+  void RtViewerApp::HandleApplicationEvent(
+    const SDL_Event& event)
+  {
+    //DisplayInfoText();
+
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+    ICompositor& compositor = lock->GetCompositor();
+
+    if (event.type == SDL_MOUSEMOTION)
+    {
+      int scancodeCount = 0;
+      const uint8_t* keyboardState = SDL_GetKeyboardState(&scancodeCount);
+
+      if (activeTracker_.get() == NULL &&
+          SDL_SCANCODE_LALT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_LALT])
+      {
+        // The "left-ctrl" key is down, while no tracker is present
+        // Let's display the info text
+        PointerEvent e;
+        e.AddPosition(compositor.GetPixelCenterCoordinates(
+          event.button.x, event.button.y));
+
+        DisplayFloatingCtrlInfoText(e);
+      }
+      else
+      {
+        HideInfoText();
+        //LOG(TRACE) << "(event.type == SDL_MOUSEMOTION)";
+        if (activeTracker_.get() != NULL)
+        {
+          //LOG(TRACE) << "(activeTracker_.get() != NULL)";
+          PointerEvent e;
+          e.AddPosition(compositor.GetPixelCenterCoordinates(
+            event.button.x, event.button.y));
+
+          //LOG(TRACE) << "event.button.x = " << event.button.x << "     " <<
+          //  "event.button.y = " << event.button.y;
+          LOG(TRACE) << "activeTracker_->PointerMove(e); " <<
+            e.GetMainPosition().GetX() << " " << e.GetMainPosition().GetY();
+
+          activeTracker_->PointerMove(e);
+          if (!activeTracker_->IsAlive())
+            activeTracker_.reset();
+        }
+      }
+    }
+    else if (event.type == SDL_MOUSEBUTTONUP)
+    {
+      if (activeTracker_)
+      {
+        PointerEvent e;
+        e.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));
+        activeTracker_->PointerUp(e);
+        if (!activeTracker_->IsAlive())
+          activeTracker_.reset();
+      }
+    }
+    else if (event.type == SDL_MOUSEBUTTONDOWN)
+    {
+      PointerEvent e;
+      e.AddPosition(compositor.GetPixelCenterCoordinates(
+        event.button.x, event.button.y));
+      if (activeTracker_)
+      {
+        activeTracker_->PointerDown(e);
+        if (!activeTracker_->IsAlive())
+          activeTracker_.reset();
+      }
+      else
+      {
+        // we ATTEMPT to create a tracker if need be
+        activeTracker_ = CreateSuitableTracker(event, e);
+      }
+    }
+    else if (event.type == SDL_KEYDOWN &&
+             event.key.repeat == 0 /* Ignore key bounce */)
+    {
+      switch (event.key.keysym.sym)
+      {
+      case SDLK_ESCAPE:
+        if (activeTracker_)
+        {
+          activeTracker_->Cancel();
+          if (!activeTracker_->IsAlive())
+            activeTracker_.reset();
+        }
+        break;
+
+      case SDLK_t:
+        if (!activeTracker_)
+          SelectNextTool();
+        else
+        {
+          LOG(WARNING) << "You cannot change the active tool when an interaction"
+            " is taking place";
+        }
+        break;
+      case SDLK_s:
+        compositor.FitContent(scene);
+        break;
+
+      case SDLK_z:
+        LOG(TRACE) << "SDLK_z has been pressed. event.key.keysym.mod == " << event.key.keysym.mod;
+        if (event.key.keysym.mod & KMOD_CTRL)
+        {
+          if (controller.CanUndo())
+          {
+            LOG(TRACE) << "Undoing...";
+            controller.Undo();
+          }
+          else
+          {
+            LOG(WARNING) << "Nothing to undo!!!";
+          }
+        }
+        break;
+
+      case SDLK_y:
+        LOG(TRACE) << "SDLK_y has been pressed. event.key.keysym.mod == " << event.key.keysym.mod;
+        if (event.key.keysym.mod & KMOD_CTRL)
+        {
+          if (controller.CanRedo())
+          {
+            LOG(TRACE) << "Redoing...";
+            controller.Redo();
+          }
+          else
+          {
+            LOG(WARNING) << "Nothing to redo!!!";
+          }
+        }
+        break;
+
+      case SDLK_c:
+        TakeScreenshot(
+          "screenshot.png",
+          compositor.GetCanvasWidth(),
+          compositor.GetCanvasHeight());
+        break;
+
+      default:
+        break;
+      }
+    }
+    else if (viewport_->IsRefreshEvent(event))
+    {
+      viewport_->Paint();
+    }
+  }
+
+  void RtViewerApp::OnSceneTransformChanged(
+    const ViewportController::SceneTransformChanged& message)
+  {
+    DisplayInfoText();
+  }
+
+  void RtViewerApp::RetrieveGeometry()
+  {
+    ORTHANC_ASSERT(geometryProvider_.get() != NULL);
+    ORTHANC_ASSERT(geometryProvider_->HasGeometry());
+    const VolumeImageGeometry& geometry = geometryProvider_->GetImageGeometry();
+
+    const unsigned int depth = geometry.GetProjectionDepth(projection_);
+    currentPlane_ = depth / 2;
+
+    planes_.resize(depth);
+
+    for (unsigned int z = 0; z < depth; z++)
+    {
+      planes_[z] = geometry.GetProjectionSlice(projection_, z);
+    }
+
+    UpdateLayers();
+
+    std::unique_ptr<OrthancStone::IViewport::ILock> lock(viewport_->Lock());
+    lock->GetCompositor().FitContent(lock->GetController().GetScene());
+    lock->Invalidate();
+  }
+
+  void RtViewerApp::FitContent()
+  {
+    std::unique_ptr<OrthancStone::IViewport::ILock> lock(viewport_->Lock());
+    lock->GetCompositor().FitContent(lock->GetController().GetScene());
+    lock->Invalidate();
+  }
+
+  void RtViewerApp::UpdateLayers()
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    if ((planes_.size() == 0)
+        && (geometryProvider_.get() != NULL)
+        && (geometryProvider_->HasGeometry()))
+    {
+      RetrieveGeometry();
+    }
+
+    if (currentPlane_ < planes_.size())
+    {
+      if (ctVolumeLayerSource_.get() != NULL)
+      {
+        ctVolumeLayerSource_->Update(planes_[currentPlane_]);
+      }
+      if (doseVolumeLayerSource_.get() != NULL)
+      {
+        doseVolumeLayerSource_->Update(planes_[currentPlane_]);
+      }
+      if (structLayerSource_.get() != NULL)
+      {
+        structLayerSource_->Update(planes_[currentPlane_]);
+      }
+    }
+    lock->Invalidate();
+  }
+
+  boost::shared_ptr<IFlexiblePointerTracker> RtViewerApp::CreateSuitableTracker(
+    const SDL_Event& event,
+    const PointerEvent& e)
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+    ICompositor& compositor = lock->GetCompositor();
+
+    using namespace Orthanc;
+
+    switch (event.button.button)
+    {
+    case SDL_BUTTON_MIDDLE:
+      return boost::shared_ptr<IFlexiblePointerTracker>(new PanSceneTracker
+      (viewport_, e));
+
+    case SDL_BUTTON_RIGHT:
+      return boost::shared_ptr<IFlexiblePointerTracker>(new ZoomSceneTracker
+      (viewport_, e, compositor.GetCanvasHeight()));
+
+    case SDL_BUTTON_LEFT:
+    {
+      //LOG(TRACE) << "CreateSuitableTracker: case SDL_BUTTON_LEFT:";
+      // TODO: we need to iterate on the set of measuring tool and perform
+      // a hit test to check if a tracker needs to be created for edition.
+      // Otherwise, depending upon the active tool, we might want to create
+      // a "measuring tool creation" tracker
+
+      // TODO: if there are conflicts, we should prefer a tracker that 
+      // pertains to the type of measuring tool currently selected (TBD?)
+      boost::shared_ptr<IFlexiblePointerTracker> hitTestTracker = TrackerHitTest(e);
+
+      if (hitTestTracker != NULL)
+      {
+        //LOG(TRACE) << "hitTestTracker != NULL";
+        return hitTestTracker;
+      }
+      else
+      {
+        switch (currentTool_)
+        {
+        case RtViewerGuiTool_Rotate:
+          //LOG(TRACE) << "Creating RotateSceneTracker";
+          return boost::shared_ptr<IFlexiblePointerTracker>(new RotateSceneTracker(viewport_, e));
+        case RtViewerGuiTool_Pan:
+          return boost::shared_ptr<IFlexiblePointerTracker>(new PanSceneTracker(viewport_, e));
+        case RtViewerGuiTool_Zoom:
+          return boost::shared_ptr<IFlexiblePointerTracker>(new ZoomSceneTracker(viewport_, e, compositor.GetCanvasHeight()));
+        //case GuiTool_AngleMeasure:
+        //  return new AngleMeasureTracker(GetScene(), e);
+        //case GuiTool_CircleMeasure:
+        //  return new CircleMeasureTracker(GetScene(), e);
+        //case GuiTool_EllipseMeasure:
+        //  return new EllipseMeasureTracker(GetScene(), e);
+        case RtViewerGuiTool_LineMeasure:
+          return boost::shared_ptr<IFlexiblePointerTracker>(new CreateLineMeasureTracker(viewport_, e));
+        case RtViewerGuiTool_AngleMeasure:
+          return boost::shared_ptr<IFlexiblePointerTracker>(new CreateAngleMeasureTracker(viewport_, e));
+        case RtViewerGuiTool_CircleMeasure:
+          LOG(ERROR) << "Not implemented yet!";
+          return boost::shared_ptr<IFlexiblePointerTracker>();
+        case RtViewerGuiTool_EllipseMeasure:
+          LOG(ERROR) << "Not implemented yet!";
+          return boost::shared_ptr<IFlexiblePointerTracker>();
+        default:
+          throw OrthancException(ErrorCode_InternalError, "Wrong tool!");
+        }
+      }
+    }
+    default:
+      return boost::shared_ptr<IFlexiblePointerTracker>();
+    }
+  }
+
+
+  RtViewerApp::RtViewerApp()
+    : oracle_(*this)
+    , currentTool_(RtViewerGuiTool_Rotate)
+    , undoStack_(new UndoStack)
+    , currentPlane_(0)
+    , projection_(VolumeProjection_Coronal)
+  {
+    loadersContext_.reset(new GenericLoadersContext(1, 4, 1));
+    loadersContext_->StartOracle();
+
+    // False means we do NOT let Windows treat this as a legacy application that needs to be scaled
+    viewport_ = SdlOpenGLViewport::Create("CT RTDOSE RTSTRUCT viewer", 1024, 1024, false);
+
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    //oracleObservable.RegisterObserverCallback
+    //(new Callable
+    //  <RtViewerApp, SleepOracleCommand::TimeoutMessage>(*this, &RtViewerApp::Handle));
+
+    //oracleObservable.RegisterObserverCallback
+    //(new Callable
+    //  <Toto, GetOrthancImageCommand::SuccessMessage>(*this, &RtViewerApp::Handle));
+
+    //oracleObservable.RegisterObserverCallback
+    //(new Callable
+    //  <RtViewerApp, GetOrthancWebViewerJpegCommand::SuccessMessage>(*this, &ToRtViewerAppto::Handle));
+
+
+    TEXTURE_2x2_1_ZINDEX = 1;
+    TEXTURE_1x1_ZINDEX = 2;
+    TEXTURE_2x2_2_ZINDEX = 3;
+    LINESET_1_ZINDEX = 4;
+    LINESET_2_ZINDEX = 5;
+    FLOATING_INFOTEXT_LAYER_ZINDEX = 6;
+    FIXED_INFOTEXT_LAYER_ZINDEX = 7;
+  }
+
+  void RtViewerApp::RegisterMessages()
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+    Register<OracleCommandExceptionMessage>(oracleObservable_, &RtViewerApp::Handle);
+    Register<ViewportController::SceneTransformChanged>(controller, &RtViewerApp::OnSceneTransformChanged);
+  }
+
+  boost::shared_ptr<RtViewerApp> RtViewerApp::Create()
+  {
+    boost::shared_ptr<RtViewerApp> thisOne(new RtViewerApp());
+    thisOne->RegisterMessages();
+    return thisOne;
+  }
+
+  void RtViewerApp::PrepareScene()
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    // Texture of 2x2 size
+    {
+      Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
+
+      uint8_t* p = reinterpret_cast<uint8_t*>(i.GetRow(0));
+      p[0] = 255;
+      p[1] = 0;
+      p[2] = 0;
+
+      p[3] = 0;
+      p[4] = 255;
+      p[5] = 0;
+
+      p = reinterpret_cast<uint8_t*>(i.GetRow(1));
+      p[0] = 0;
+      p[1] = 0;
+      p[2] = 255;
+
+      p[3] = 255;
+      p[4] = 0;
+      p[5] = 0;
+
+      scene.SetLayer(TEXTURE_2x2_1_ZINDEX, new ColorTextureSceneLayer(i));
+    }
+  }
+
+  void RtViewerApp::DisableTracker()
+  {
+    if (activeTracker_)
+    {
+      activeTracker_->Cancel();
+      activeTracker_.reset();
+    }
+  }
+
+  void RtViewerApp::TakeScreenshot(const std::string& target,
+                                                unsigned int canvasWidth,
+                                                unsigned int canvasHeight)
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    CairoCompositor compositor(canvasWidth, canvasHeight);
+    compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT, FONT_SIZE_0, Orthanc::Encoding_Latin1);
+    compositor.Refresh(scene);
+
+    Orthanc::ImageAccessor canvas;
+    compositor.GetCanvas().GetReadOnlyAccessor(canvas);
+
+    Orthanc::Image png(Orthanc::PixelFormat_RGB24, canvas.GetWidth(), canvas.GetHeight(), false);
+    Orthanc::ImageProcessing::Convert(png, canvas);
+
+    Orthanc::PngWriter writer;
+    writer.WriteToFile(target, png);
+  }
+
+  boost::shared_ptr<IFlexiblePointerTracker> RtViewerApp::TrackerHitTest(const PointerEvent& e)
+  {
+    // std::vector<boost::shared_ptr<MeasureTool>> measureTools_;
+    return boost::shared_ptr<IFlexiblePointerTracker>();
+  }
+
+  static void GLAPIENTRY
+    OpenGLMessageCallback(GLenum source,
+                          GLenum type,
+                          GLuint id,
+                          GLenum severity,
+                          GLsizei length,
+                          const GLchar* message,
+                          const void* userParam)
+  {
+    if (severity != GL_DEBUG_SEVERITY_NOTIFICATION)
+    {
+      fprintf(stderr, "GL CALLBACK: %s type = 0x%x, severity = 0x%x, message = %s\n",
+              (type == GL_DEBUG_TYPE_ERROR ? "** GL ERROR **" : ""),
+              type, severity, message);
+    }
+  }
+
+  static bool g_stopApplication = false;
+
+
+  void RtViewerApp::Handle(const DicomVolumeImage::GeometryReadyMessage& message)
+  {
+    RetrieveGeometry();
+  }
+
+
+  void RtViewerApp::Handle(const OracleCommandExceptionMessage& message)
+  {
+    const OracleCommandBase& command = dynamic_cast<const OracleCommandBase&>(message.GetOrigin());
+
+    printf("EXCEPTION: [%s] on command type %d\n", message.GetException().What(), command.GetType());
+
+    switch (command.GetType())
+    {
+    case IOracleCommand::Type_GetOrthancWebViewerJpeg:
+      printf("URI: [%s]\n", dynamic_cast<const GetOrthancWebViewerJpegCommand&>(command).GetUri().c_str());
+      break;
+
+    default:
+      break;
+    }
+  }
+
+
+  void RtViewerApp::HandleCTLoaded(const OrthancSeriesVolumeProgressiveLoader::VolumeImageReadyInHighQuality& message)
+  {
+    UpdateLayers();
+  }
+
+  void RtViewerApp::HandleCTContentUpdated(const DicomVolumeImage::ContentUpdatedMessage& message)
+  {
+    UpdateLayers();
+  }
+
+  void RtViewerApp::HandleDoseLoaded(const DicomVolumeImage::ContentUpdatedMessage& message)
+  {
+    //TODO: compute dose extent, with outlier rejection
+    UpdateLayers();
+  }
+
+  void RtViewerApp::HandleStructuresReady(const DicomStructureSetLoader::StructuresReady& message)
+  {
+    UpdateLayers();
+  }
+
+  void RtViewerApp::HandleStructuresUpdated(const DicomStructureSetLoader::StructuresUpdated& message)
+  {
+    UpdateLayers();
+  }
+
+  void RtViewerApp::SetCtVolume(int depth,
+                                            const boost::shared_ptr<OrthancStone::IVolumeSlicer>& volume,
+                                            OrthancStone::ILayerStyleConfigurator* style)
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    ctVolumeLayerSource_.reset(new OrthancStone::VolumeSceneLayerSource(scene, depth, volume));
+
+    if (style != NULL)
+    {
+      ctVolumeLayerSource_->SetConfigurator(style);
+    }
+  }
+
+  void RtViewerApp::SetDoseVolume(int depth,
+                                            const boost::shared_ptr<OrthancStone::IVolumeSlicer>& volume,
+                                            OrthancStone::ILayerStyleConfigurator* style)
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    doseVolumeLayerSource_.reset(new OrthancStone::VolumeSceneLayerSource(scene, depth, volume));
+
+    if (style != NULL)
+    {
+      doseVolumeLayerSource_->SetConfigurator(style);
+    }
+  }
+
+  void RtViewerApp::SetStructureSet(int depth,
+                                                 const boost::shared_ptr<OrthancStone::DicomStructureSetLoader>& volume)
+  {
+    std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+    ViewportController& controller = lock->GetController();
+    Scene2D& scene = controller.GetScene();
+
+    structLayerSource_.reset(new OrthancStone::VolumeSceneLayerSource(scene, depth, volume));
+  }
+
+  void RtViewerApp::Run()
+  {
+    {
+      std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
+      ViewportController& controller = lock->GetController();
+      Scene2D& scene = controller.GetScene();
+      ICompositor& compositor = lock->GetCompositor();
+
+      // False means we do NOT let Windows treat this as a legacy application
+      // that needs to be scaled
+      controller.FitContent(compositor.GetCanvasWidth(), compositor.GetCanvasHeight());
+
+      glEnable(GL_DEBUG_OUTPUT);
+      glDebugMessageCallback(OpenGLMessageCallback, 0);
+
+      compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
+                         FONT_SIZE_0, Orthanc::Encoding_Latin1);
+      compositor.SetFont(1, Orthanc::EmbeddedResources::UBUNTU_FONT,
+                         FONT_SIZE_1, Orthanc::Encoding_Latin1);
+    }
+                     //////// from loader
+    {
+      Orthanc::WebServiceParameters p;
+      //p.SetUrl("http://localhost:8043/");
+      p.SetCredentials("orthanc", "orthanc");
+      oracle_.SetOrthancParameters(p);
+    }
+
+    //////// from Run
+
+    boost::shared_ptr<DicomVolumeImage>  ctVolume(new DicomVolumeImage);
+    boost::shared_ptr<DicomVolumeImage>  doseVolume(new DicomVolumeImage);
+
+
+    boost::shared_ptr<OrthancSeriesVolumeProgressiveLoader> ctLoader;
+    boost::shared_ptr<OrthancMultiframeVolumeLoader> doseLoader;
+    boost::shared_ptr<DicomStructureSetLoader>  rtstructLoader;
+
+    {
+      // "true" means use progressive quality (jpeg 50 --> jpeg 90 --> 16-bit raw)
+      ctLoader = OrthancSeriesVolumeProgressiveLoader::Create(*loadersContext_, ctVolume, false);
+      
+      // we need to store the CT loader to ask from geometry details later on when geometry is loaded
+      geometryProvider_ = ctLoader;
+
+      doseLoader = OrthancMultiframeVolumeLoader::Create(*loadersContext_, doseVolume);
+      rtstructLoader = DicomStructureSetLoader::Create(*loadersContext_);
+    }
+
+    Register<DicomVolumeImage::GeometryReadyMessage>(*ctLoader, &RtViewerApp::Handle);
+    Register<OrthancSeriesVolumeProgressiveLoader::VolumeImageReadyInHighQuality>(*ctLoader, &RtViewerApp::HandleCTLoaded);
+    Register<DicomVolumeImage::ContentUpdatedMessage>(*ctLoader, &RtViewerApp::HandleCTContentUpdated);
+    Register<DicomVolumeImage::ContentUpdatedMessage>(*doseLoader, &RtViewerApp::HandleDoseLoaded);
+    Register<DicomStructureSetLoader::StructuresReady>(*rtstructLoader, &RtViewerApp::HandleStructuresReady);
+    Register<DicomStructureSetLoader::StructuresUpdated>(*rtstructLoader, &RtViewerApp::HandleStructuresUpdated);
+
+    std::auto_ptr<GrayscaleStyleConfigurator> style(new GrayscaleStyleConfigurator);
+    style->SetLinearInterpolation(true);
+
+    this->SetCtVolume(LAYER_POSITION + 0, ctLoader, style.release());
+
+    {
+      std::unique_ptr<LookupTableStyleConfigurator> config(new LookupTableStyleConfigurator);
+      config->SetLookupTable(Orthanc::EmbeddedResources::COLORMAP_HOT);
+
+      boost::shared_ptr<DicomVolumeImageMPRSlicer> tmp(new DicomVolumeImageMPRSlicer(doseVolume));
+      this->SetDoseVolume(LAYER_POSITION + 1, tmp, config.release());
+    }
+
+    this->SetStructureSet(LAYER_POSITION + 2, rtstructLoader);
+
+#if 1
+    /*
+    BGO data
+    http://localhost:8042/twiga-orthanc-viewer-demo/twiga-orthanc-viewer-demo.html?ct-series=a04ecf01-79b2fc33-58239f7e-ad9db983-28e81afa
+    &
+    dose-instance=830a69ff-8e4b5ee3-b7f966c8-bccc20fb-d322dceb
+    &
+    struct-instance=54460695-ba3885ee-ddf61ac0-f028e31d-a6e474d9
+    */
+    ctLoader->LoadSeries("a04ecf01-79b2fc33-58239f7e-ad9db983-28e81afa");  // CT
+    doseLoader->LoadInstance("830a69ff-8e4b5ee3-b7f966c8-bccc20fb-d322dceb");  // RT-DOSE
+    rtstructLoader->LoadInstance("54460695-ba3885ee-ddf61ac0-f028e31d-a6e474d9");  // RT-STRUCT
+#else
+    //ctLoader->LoadSeries("cb3ea4d1-d08f3856-ad7b6314-74d88d77-60b05618");  // CT
+    //doseLoader->LoadInstance("41029085-71718346-811efac4-420e2c15-d39f99b6");  // RT-DOSE
+    //rtstructLoader->LoadInstance("83d9c0c3-913a7fee-610097d7-cbf0522d-fd75bee6");  // RT-STRUCT
+
+    // 2017-05-16
+    ctLoader->LoadSeries("a04ecf01-79b2fc33-58239f7e-ad9db983-28e81afa");  // CT
+    doseLoader->LoadInstance("eac822ef-a395f94e-e8121fe0-8411fef8-1f7bffad");  // RT-DOSE
+    rtstructLoader->LoadInstance("54460695-ba3885ee-ddf61ac0-f028e31d-a6e474d9");  // RT-STRUCT
+#endif
+
+    oracle_.Start();
+
+//// END from loader
+
+    while (!g_stopApplication)
+    {
+      //compositor.Refresh(scene);
+
+//////// from loader
+//// END from loader
+
+      SDL_Event event;
+      while (!g_stopApplication && SDL_PollEvent(&event))
+      {
+        if (event.type == SDL_QUIT)
+        {
+          g_stopApplication = true;
+          break;
+        }
+        else if (event.type == SDL_WINDOWEVENT &&
+                 event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED)
+        {
+          DisableTracker(); // was: tracker.reset(NULL);
+        }
+        else if (event.type == SDL_KEYDOWN &&
+                 event.key.repeat == 0 /* Ignore key bounce */)
+        {
+          switch (event.key.keysym.sym)
+          {
+          case SDLK_f:
+            // TODO: implement GetWindow!!!
+            // viewport_->GetContext()->GetWindow().ToggleMaximize();
+            ORTHANC_ASSERT(false, "Please implement GetWindow()");
+            break;
+
+          case SDLK_r:
+            break;
+
+          case SDLK_s:
+            FitContent();
+            break;
+
+          case SDLK_q:
+            g_stopApplication = true;
+            break;
+          default:
+            break;
+          }
+        }
+        HandleApplicationEvent(event);
+      }
+      SDL_Delay(1);
+    }
+
+    //// from loader
+
+    //Orthanc::SystemToolbox::ServerBarrier();
+
+    /**
+     * WARNING => The oracle must be stopped BEFORE the objects using
+     * it are destroyed!!! This forces to wait for the completion of
+     * the running callback methods. Otherwise, the callbacks methods
+     * might still be running while their parent object is destroyed,
+     * resulting in crashes. This is very visible if adding a sleep(),
+     * as in (*).
+     **/
+
+    oracle_.Stop();
+    //// END from loader
+  }
+
+  void RtViewerApp::SetInfoDisplayMessage(
+    std::string key, std::string value)
+  {
+    if (value == "")
+      infoTextMap_.erase(key);
+    else
+      infoTextMap_[key] = value;
+    DisplayInfoText();
+  }
+
+}
+
+
+boost::weak_ptr<OrthancStone::RtViewerApp> g_app;
+
+void RtViewer_SetInfoDisplayMessage(std::string key, std::string value)
+{
+  boost::shared_ptr<OrthancStone::RtViewerApp> app = g_app.lock();
+  if (app)
+  {
+    app->SetInfoDisplayMessage(key, value);
+  }
+}
+
+/**
+ * IMPORTANT: The full arguments to "main()" are needed for SDL on
+ * Windows. Otherwise, one gets the linking error "undefined reference
+ * to `SDL_main'". https://wiki.libsdl.org/FAQWindows
+ **/
+int main(int argc, char* argv[])
+{
+  using namespace OrthancStone;
+
+  StoneInitialize();
+  Orthanc::Logging::EnableInfoLevel(true);
+  //Orthanc::Logging::EnableTraceLevel(true);
+
+  try
+  {
+    boost::shared_ptr<RtViewerApp> app = RtViewerApp::Create();
+    g_app = app;
+    //app->PrepareScene();
+    app->Run();
+  }
+  catch (Orthanc::OrthancException& e)
+  {
+    LOG(ERROR) << "EXCEPTION: " << e.What();
+  }
+
+  StoneFinalize();
+
+  return 0;
+}
+
+