1 files changed, 82 insertions, 0 deletions
diff --git a/intern/vamr/intern/Session.h b/intern/vamr/intern/Session.h
new file mode 100644
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+++ b/intern/vamr/intern/Session.h
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+/*
+ * 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 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/** \file
+ * \ingroup VAMR
+ */
+
+#ifndef __SESSION_H__
+#define __SESSION_H__
+
+#include <map>
+#include <memory>
+
+namespace VAMR {
+
+class Session {
+ public:
+  enum eLifeExpectancy {
+    SESSION_KEEP_ALIVE,
+    SESSION_DESTROY,
+  };
+
+  Session(class Context *xr_context);
+  ~Session();
+
+  void start(const VAMR_SessionBeginInfo *begin_info);
+  void requestEnd();
+
+  eLifeExpectancy handleStateChangeEvent(const struct XrEventDataSessionStateChanged *lifecycle);
+
+  bool isRunning() const;
+
+  void unbindGraphicsContext(); /* public so context can ensure it's unbound as needed. */
+
+  void draw(void *draw_customdata);
+
+ private:
+  /** Pointer back to context managing this session. Would be nice to avoid, but needed to access
+   * custom callbacks set before session start. */
+  class Context *m_context;
+
+  std::unique_ptr<struct OpenXRSessionData> m_oxr; /* Could use stack, but PImpl is preferable */
+
+  /** Active Ghost graphic context. Owned by Blender, not VAMR. */
+  class GHOST_Context *m_gpu_ctx{nullptr};
+  std::unique_ptr<class IGraphicsBinding> m_gpu_binding;
+
+  /** Rendering information. Set when drawing starts. */
+  std::unique_ptr<struct DrawInfo> m_draw_info;
+
+  void initSystem();
+  void end();
+
+  void bindGraphicsContext();
+
+  void prepareDrawing();
+  XrCompositionLayerProjection drawLayer(
+      std::vector<XrCompositionLayerProjectionView> &proj_layer_views, void *draw_customdata);
+  void drawView(XrSwapchain swapchain,
+                XrCompositionLayerProjectionView &proj_layer_view,
+                XrView &view,
+                void *draw_customdata);
+  void beginFrameDrawing();
+  void endFrameDrawing(std::vector<XrCompositionLayerBaseHeader *> *layers);
+};
+
+}  // namespace VAMR
+
+#endif /* __SESSION_H__ */