DtDrawFBOCallback.h

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/******************************************************************************
** Copyright (c) 2019 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <osg/Camera>
#include <osg/FrameBufferObject>

class DtCVSpan;
class DtCVMarkerSeries;

namespace osg
{
   class RenderInfo;
}

namespace makVrv
{
   class DtGlDebugGroup;

   struct DT_DLL_VRVOSG PreDrawFBOCallback : public osg::Camera::DrawCallback
   {
      PreDrawFBOCallback( osg::FrameBufferObject* fbo);
      virtual ~PreDrawFBOCallback();

      virtual void operator () (osg::RenderInfo& renderInfo) const;

      virtual void enableBindFbo(bool bind);

      virtual void setProfileSubsystem(const char * profName) {
         myPerformanceModule = profName; 
      }
      virtual void setProfileFunction(const char * funcName) {
         myProfileFunction = funcName;
      }

      virtual void endDrawPass(osg::RenderInfo& renderInfo);

   private:
      osg::ref_ptr<osg::FrameBufferObject> mySharedFbo;
      bool myEnableBindFbo;
      const char* myPerformanceModule;
      // owned externally so that comparisons work.
      const char * myProfileFunction;
      mutable DtCVSpan * mySpan;
      mutable DtCVMarkerSeries * myMarker;
      mutable DtGlDebugGroup* myGlDebugGroup;
   };


   struct DT_DLL_VRVOSG PostDrawFBOCallback : public osg::Camera::DrawCallback
   {
      PostDrawFBOCallback();

      virtual void operator () (osg::RenderInfo& renderInfo) const;

      void setRestoreDrawBuffer(GLenum bufferAttachment);

      void setRestoreReadBuffer(GLenum bufferAttachment);

      void enableUnbindFbo(bool unbind);

      void setPredrawCallback(PreDrawFBOCallback * predraw_callback) {
         myPreDrawCallback = predraw_callback;
      }

   private:
      GLenum myDrawBufferAttachment;
      GLenum myReadBufferAttachment;
      bool myEnableUnbindFbo;

      PreDrawFBOCallback * myPreDrawCallback;
   };

}