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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__ */
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