DtSdsmDrawCallback.h

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/******************************************************************************
** Copyright (c) 2016 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <osg/Camera>

namespace makVrv
{
   struct SdsmDrawCallback : public osg::Camera::DrawCallback
   {
      SdsmDrawCallback(bool bindFbo, GLenum colorAttachment, unsigned int numPipelines, unsigned int numPartitions, unsigned int width, unsigned int height);

      virtual ~SdsmDrawCallback();

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

      float minDepth() const;

      float maxDepth() const;

      float minDepth(unsigned int splitIndex) const;

      float maxDepth(unsigned int splitIndex) const;

      osg::Vec2 partition(unsigned int splitIndex) const;

      bool isSDSMDepthAvailable() const;
   private:
      mutable std::vector<osg::Vec2> myPartitions;
      mutable unsigned int myFBOBufferIndex;
      mutable std::vector<unsigned int> myPBOBufferIndex;
      mutable unsigned int myCurrentPBOIndex;
      mutable unsigned int myColorTextureIndex;
      mutable unsigned int myDepthRBOBufferIndex;
      GLenum myColorAttachment;
      bool myBindFbo;
      unsigned int myWidth;
      unsigned int myHeight;
      mutable float myMinDepth;
      mutable float myMaxDepth;
      mutable float myMinDepthArray[20];
      mutable float myMaxDepthArray[20];
      mutable bool mySDSMDepthAvailable;
   };


   struct PostDrawSDSMCallback : public osg::Camera::DrawCallback
   {
      PostDrawSDSMCallback(){}

      // Callback Method to unbind the currently bound framebuffer object
      virtual void operator () (osg::RenderInfo& renderInfo) const;
   };
}