DtIndirectDrawComponent.h

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/******************************************************************************
** Copyright (c) 2021 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <osg/StateSet>
#include <osg/Uniform>

#include <string>

namespace osg
{
   class RenderInfo;
}

namespace makVrv
{
   class DtDe;
   class DtGlBuffer;
   class DtIndirectShaderConstants;

   class DT_DLL_VRVOSG DtIndirectDrawComponent
   {
   public:
      DtIndirectDrawComponent(DtDe& de);

      virtual ~DtIndirectDrawComponent();
   private:
      DtIndirectDrawComponent() = delete;

      DtIndirectDrawComponent(const DtIndirectDrawComponent& rhs) = delete;

      DtIndirectDrawComponent&operator=(const DtIndirectDrawComponent& rhs) = delete;

   public:
      virtual void update(osg::RenderInfo& renderInfo);

      virtual void apply(osg::RenderInfo& renderInfo) = 0;

      virtual void draw(osg::RenderInfo& renderInfo, const int offsetCommandBuffer, GLenum indicesType, int maxCommands
         , DtGlBuffer* gpuShaderUbo, int gpuShaderBinding, DtIndirectShaderConstants* shaderConstants);

      virtual void releaseGLObjects(osg::State* state);

      virtual bool shouldDraw(bool isShadowPass);

   protected:
      virtual std::string indicesTypeToString(int indicesType);

   protected:
      DtDe& myDe;

      osg::ref_ptr<osg::StateSet> myStateSet;
   };
}