--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Samples/Sdl/SimpleViewer/SdlSimpleViewer.cpp	Sat Apr 18 14:45:22 2020 +0200
@@ -0,0 +1,292 @@
+
+#include "SdlSimpleViewerApplication.h"
+
+#include <Core/OrthancException.h>
+
+#include <Framework/Loaders/GenericLoadersContext.h>
+#include <Framework/StoneException.h>
+#include <Framework/StoneEnumerations.h>
+#include <Framework/StoneInitialization.h>
+#include <Framework/Viewport/SdlViewport.h>
+
+#include <SDL.h>
+
+namespace OrthancStone
+{
+  static KeyboardModifiers GetKeyboardModifiers(const uint8_t* keyboardState,
+                                                const int scancodeCount)
+  {
+    int result = KeyboardModifiers_None;
+
+    if (keyboardState != NULL)
+    {
+      if (SDL_SCANCODE_LSHIFT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_LSHIFT])
+      {
+        result |= KeyboardModifiers_Shift;
+      }
+
+      if (SDL_SCANCODE_RSHIFT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_RSHIFT])
+      {
+        result |= KeyboardModifiers_Shift;
+      }
+
+      if (SDL_SCANCODE_LCTRL < scancodeCount &&
+          keyboardState[SDL_SCANCODE_LCTRL])
+      {
+        result |= KeyboardModifiers_Control;
+      }
+
+      if (SDL_SCANCODE_RCTRL < scancodeCount &&
+          keyboardState[SDL_SCANCODE_RCTRL])
+      {
+        result |= KeyboardModifiers_Control;
+      }
+
+      if (SDL_SCANCODE_LALT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_LALT])
+      {
+        result |= KeyboardModifiers_Alt;
+      }
+
+      if (SDL_SCANCODE_RALT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_RALT])
+      {
+        result |= KeyboardModifiers_Alt;
+      }
+    }
+
+    return static_cast<KeyboardModifiers>(result);
+  }
+
+
+  static void GetPointerEvent(PointerEvent& p,
+                              const ICompositor& compositor,
+                              SDL_Event event,
+                              const uint8_t* keyboardState,
+                              const int scancodeCount)
+  {
+    KeyboardModifiers modifiers = GetKeyboardModifiers(keyboardState, scancodeCount);
+
+    switch (event.button.button)
+    {
+    case SDL_BUTTON_LEFT:
+      p.SetMouseButton(OrthancStone::MouseButton_Left);
+      break;
+
+    case SDL_BUTTON_RIGHT:
+      p.SetMouseButton(OrthancStone::MouseButton_Right);
+      break;
+
+    case SDL_BUTTON_MIDDLE:
+      p.SetMouseButton(OrthancStone::MouseButton_Middle);
+      break;
+
+    default:
+      p.SetMouseButton(OrthancStone::MouseButton_None);
+      break;
+    }
+
+    p.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));
+    p.SetAltModifier(modifiers & KeyboardModifiers_Alt);
+    p.SetControlModifier(modifiers & KeyboardModifiers_Control);
+    p.SetShiftModifier(modifiers & KeyboardModifiers_Shift);
+  }
+
+}
+
+/**
+ * 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[])
+{
+  try
+  {
+    OrthancStone::StoneInitialize();
+    Orthanc::Logging::EnableInfoLevel(true);
+    //Orthanc::Logging::EnableTraceLevel(true);
+
+    {
+
+#if 1
+      boost::shared_ptr<OrthancStone::SdlViewport> viewport = 
+        OrthancStone::SdlOpenGLViewport::Create("Stone of Orthanc", 800, 600);
+#else
+      boost::shared_ptr<OrthancStone::SdlViewport> viewport =
+        OrthancStone::SdlCairoViewport::Create("Stone of Orthanc", 800, 600);
+#endif
+
+      OrthancStone::GenericLoadersContext context(1, 4, 1);
+      
+      context.StartOracle();
+
+      {
+
+        boost::shared_ptr<SdlSimpleViewerApplication> application(
+          SdlSimpleViewerApplication::Create(context, viewport));
+
+        OrthancStone::DicomSource source;
+
+        // Default and command-line parameters
+        const char* instanceId = "285dece8-e1956b38-cdc7d084-6ce3371e-536a9ffc";
+        unsigned int frameIndex = 0;
+
+        if (argc == 1)
+        {
+          LOG(ERROR) << "No instanceId supplied. The default of " << instanceId << " will be used. "
+            << "Please supply the Orthanc instance ID of the frame you wish to display then, optionally, "
+            << "the zero-based index of the frame (for multi-frame instances)";
+          // TODO: frame number as second argument...
+        }
+
+        if (argc >= 2)
+          instanceId = argv[1];
+
+        if (argc >= 3)
+          frameIndex = atoi(argv[1]);
+
+        if (argc > 3)
+        {
+          LOG(ERROR) << "Extra arguments ignored!";
+        }
+         
+
+        application->LoadOrthancFrame(source, instanceId, frameIndex);
+
+        OrthancStone::DefaultViewportInteractor interactor;
+
+        {
+          int scancodeCount = 0;
+          const uint8_t* keyboardState = SDL_GetKeyboardState(&scancodeCount);
+
+          bool stop = false;
+          while (!stop)
+          {
+            bool paint = false;
+            SDL_Event event;
+            while (SDL_PollEvent(&event))
+            {
+              if (event.type == SDL_QUIT)
+              {
+                stop = true;
+                break;
+              }
+              else if (viewport->IsRefreshEvent(event))
+              {
+                paint = true;
+              }
+              else if (event.type == SDL_WINDOWEVENT &&
+                (event.window.event == SDL_WINDOWEVENT_RESIZED ||
+                 event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED))
+              {
+                viewport->UpdateSize(event.window.data1, event.window.data2);
+              }
+              else if (event.type == SDL_WINDOWEVENT &&
+                (event.window.event == SDL_WINDOWEVENT_SHOWN ||
+                 event.window.event == SDL_WINDOWEVENT_EXPOSED))
+              {
+                paint = true;
+              }
+              else if (event.type == SDL_KEYDOWN &&
+                       event.key.repeat == 0 /* Ignore key bounce */)
+              {
+                switch (event.key.keysym.sym)
+                {
+                case SDLK_f:
+                  viewport->ToggleMaximize();
+                  break;
+
+                case SDLK_s:
+                  application->FitContent();
+                  break;
+
+                case SDLK_q:
+                  stop = true;
+                  break;
+
+                default:
+                  break;
+                }
+              }
+              else if (event.type == SDL_MOUSEBUTTONDOWN ||
+                       event.type == SDL_MOUSEMOTION ||
+                       event.type == SDL_MOUSEBUTTONUP)
+              {
+                std::auto_ptr<OrthancStone::IViewport::ILock> lock(viewport->Lock());
+                if (lock->HasCompositor())
+                {
+                  OrthancStone::PointerEvent p;
+                  OrthancStone::GetPointerEvent(p, lock->GetCompositor(),
+                                                event, keyboardState, scancodeCount);
+
+                  switch (event.type)
+                  {
+                  case SDL_MOUSEBUTTONDOWN:
+                    lock->GetController().HandleMousePress(interactor, p,
+                                                           lock->GetCompositor().GetCanvasWidth(),
+                                                           lock->GetCompositor().GetCanvasHeight());
+                    lock->Invalidate();
+                    break;
+
+                  case SDL_MOUSEMOTION:
+                    if (lock->GetController().HandleMouseMove(p))
+                    {
+                      lock->Invalidate();
+                    }
+                    break;
+
+                  case SDL_MOUSEBUTTONUP:
+                    lock->GetController().HandleMouseRelease(p);
+                    lock->Invalidate();
+                    break;
+
+                  default:
+                    throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+                  }
+                }
+              }
+            }
+
+            if (paint)
+            {
+              viewport->Paint();
+            }
+
+            // Small delay to avoid using 100% of CPU
+            SDL_Delay(1);
+          }
+        }
+
+        context.StopOracle();
+      }
+    }
+
+    OrthancStone::StoneFinalize();
+    return 0;
+  }
+  catch (Orthanc::OrthancException & e)
+  {
+    auto test = e.What();
+    fprintf(stdout, test);
+    LOG(ERROR) << "OrthancException: " << e.What();
+    return -1;
+  }
+  catch (OrthancStone::StoneException & e)
+  {
+    LOG(ERROR) << "StoneException: " << e.What();
+    return -1;
+  }
+  catch (std::runtime_error & e)
+  {
+    LOG(ERROR) << "Runtime error: " << e.what();
+    return -1;
+  }
+  catch (...)
+  {
+    LOG(ERROR) << "Native exception";
+    return -1;
+  }
+}