DtIndirectDofProgram.h

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/*****************************************************************************
 * Copyright (c) 2022 MAK Technologies, Inc.
 * All rights reserved.
 *****************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvMath/DtVector3.h>

#include <vrvUtil/DtVirtualBaseClass.h>

#include <vrvIndirectRendering/DtIndirectModelScalingAlgorithm.h>

#include <vrvOsg/DtIndirectDofProgramConstants.h>

#include <atomic>

namespace makVrv
{
   class DtDe;
   class DtOsgShaderFilesCache;
   class DtIndirectViewParameters;
   class DtGlBuffer;
   class DtGlProgram;

   class DT_DLL_VRVOSG DtIndirectDofProgram : public DtVirtualBaseClass
   {
   public:
      virtual ~DtIndirectDofProgram();

      static DtIndirectDofProgram* instance(DtDe& de);

   protected:
      DtIndirectDofProgram(DtDe& de);
   private:
      DtIndirectDofProgram() = delete;
      DtIndirectDofProgram(const DtIndirectDofProgram&) = delete;
      DtIndirectDofProgram& operator=(const DtIndirectDofProgram&) = delete;
   public:
      virtual void runProcessDofsComputeShader(const DtIndirectViewParameters& viewParameters
         , unsigned int maxNumInstances, float transitionPercentage);

      virtual void deleteShaders();

      virtual void incrementNumUsers();

      virtual void decrementNumUsers();

      virtual DtIndirectModelScalingAlgorithm scalingAlgorithm(void) const;

      virtual void setScalingAlgorithm(DtIndirectModelScalingAlgorithm scalingAlgorithm);

   protected:
      virtual void initializeShadersIfNecessary(const DtIndirectViewParameters& viewParameters);

   protected:
      DtGlProgram* myDofProgram;

      DtVector3<int> myWorkGroupLocalSize;
      std::atomic<int> myNumUsers;

      DtDe& myDe;

      DtIndirectModelScalingAlgorithm myScalingAlgorithm;

      DtGlBuffer* myGpuShaderUbo;
      int myGpuShaderUboBinding;

      DtIndirectDofProgramConstants myDofProgramConstants;

      static const std::string theDofComputeShaderFilePath;
   };
}