--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/OpenGL/OpenGLIncludes.h	Tue Jul 07 16:21:02 2020 +0200
@@ -0,0 +1,116 @@
+/**
+ * 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/>.
+ **/
+
+
+#pragma once
+
+#include "../OrthancStone.h"
+
+#if !defined(ORTHANC_ENABLE_OPENGL)
+#  error The macro ORTHANC_ENABLE_OPENGL must be defined
+#endif
+
+#if ORTHANC_ENABLE_OPENGL != 1
+#  error Support for OpenGL is disabled
+#endif
+
+#if defined(__APPLE__)
+#  include <OpenGL/gl.h>
+#  include <OpenGL/glext.h>
+#elif defined(QT_VERSION_MAJOR) && (QT_VERSION >= 5)
+// Qt5 takes care of the inclusions
+#elif defined(_WIN32)
+// On Windows, use the compatibility headers provided by glew
+#  include <GL/glew.h>
+#else
+#  include <GL/gl.h>
+#  include <GL/glext.h>
+#endif
+
+#if ORTHANC_ENABLE_SDL == 1
+# include <SDL_video.h>
+
+# ifdef NDEBUG
+
+// glGetError is very expensive!
+
+#   define ORTHANC_OPENGL_CHECK(name)
+#   define ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT(msg)
+
+# else 
+
+#   define ORTHANC_OPENGL_CHECK(name) \
+if(true)                                                                                                                                \
+{                                                                                                                                       \
+  GLenum error = glGetError();                                                                                                          \
+  if (error != GL_NO_ERROR) {                                                                                                           \
+    SDL_GLContext ctx = SDL_GL_GetCurrentContext();                                                                                     \
+    LOG(ERROR) << "Error when calling " << name << " | current context is: 0x" << std::hex << ctx <<  " | error code is " << error;     \
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,"OpenGL error in " name " | See log.");                            \
+  }                                                                                                                                     \
+} else (void)0
+
+#   define ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT(msg)                          \
+if(true)                                                                   \
+{                                                                          \
+  SDL_GLContext ctx = SDL_GL_GetCurrentContext();                          \
+  LOG(TRACE) << msg << " | Current OpenGL context is " << std::hex << ctx; \
+} else (void)0
+
+# endif
+
+#endif
+
+#if ORTHANC_ENABLE_WASM == 1
+#include <emscripten/html5.h>
+
+#define ORTHANC_OPENGL_CHECK(name) \
+if(true)                                                                                                                                                                                    \
+{                                                                                                                                                                                           \
+  GLenum error = glGetError();                                                                                                                                                              \
+  if (error != GL_NO_ERROR) {                                                                                                                                                               \
+    EMSCRIPTEN_WEBGL_CONTEXT_HANDLE ctx = emscripten_webgl_get_current_context();                                                                                                           \
+    EM_BOOL lost = emscripten_is_webgl_context_lost(ctx);                                                                                                                                   \
+    LOG(ERROR) << "Error when calling " << name << " | current context is: 0x" << std::hex << ctx <<  " | error code is " << error << " | emscripten_is_webgl_context_lost = " << lost;     \
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,"OpenGL error in " name " | See log.");                                                                                \
+  }                                                                                                                                                                                         \
+} else (void)0
+
+#define ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT(msg)                                 \
+if(true)                                                                          \
+{                                                                                 \
+  EMSCRIPTEN_WEBGL_CONTEXT_HANDLE ctx = emscripten_webgl_get_current_context();   \
+  LOG(TRACE) << msg << " | Current OpenGL context is " << std::hex << ctx;        \
+} else (void)0
+
+#define ORTHANC_CHECK_CURRENT_CONTEXT(context)                                                                                                         \
+if(true)                                                                                                                                               \
+{                                                                                                                                                      \
+  EMSCRIPTEN_WEBGL_CONTEXT_HANDLE ctx = emscripten_webgl_get_current_context();                                                                        \
+  void* actualCtx = reinterpret_cast<void*>(ctx);                                                                                                      \
+  void* expectedCtx = context.DebugGetInternalContext();                                                                                               \
+  if(expectedCtx != actualCtx)                                                                                                                         \
+  {                                                                                                                                                    \
+    LOG(ERROR) << "Expected context was " << std::hex << expectedCtx << " while actual context is " << std::hex << actualCtx;                          \
+  }                                                                                                                                                    \
+} else (void)0
+
+#endif
+