DtIndirectLightPointDrawComponent.h

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/******************************************************************************
** Copyright (c) 2020 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvOsg/DtIndirectDrawComponent.h>

#include <vrvCore/DtVirtualBaseClassCreator.h>

#include <osg/StateSet>

namespace osg
{
   class State;
}

namespace makVrv
{
   class DtIndirectGeometryRegistrar;
   class DtVirtualProgramCache;
   class DtIndirectEffectTexturesTemplate;
   class DtOsgLightPointManager;
   
   class DtGlProgram;
   class DtGlBuffer;

   class DtIndirectLightPointDrawComponent;

   typedef DtVirtualBaseClassCreator<DtIndirectLightPointDrawComponent> DtIndirectLightPointDrawComponentCreator;

   template <>
   inline const char* creatorTypeName<DtIndirectLightPointDrawComponent>(void) { return "DtIndirectLightPointDrawComponentCreator"; }

   class DtIndirectLightPointDrawComponentShaderConstants;

   class DT_DLL_VRVOSG DtIndirectLightPointDrawComponent : public DtIndirectDrawComponent
   {
   public:
      friend DtIndirectLightPointDrawComponentCreator;

      virtual ~DtIndirectLightPointDrawComponent();
   protected:
      DtIndirectLightPointDrawComponent(DtDe& de);
   private:
      DtIndirectLightPointDrawComponent() = delete;

      DtIndirectLightPointDrawComponent(const DtIndirectLightPointDrawComponent& rhs) = delete;

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

   public:
      virtual void initialize(DtIndirectGeometryRegistrar& registrar
         , DtIndirectEffectTexturesTemplate& effectTexturesState
         , DtVirtualProgramCache& virtualProgramCache);

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

      virtual void apply(osg::RenderInfo& renderInfo) override;

      virtual void draw(osg::RenderInfo& renderInfo, const int offsetCommandBuffer, GLenum indicesType, int maxCommands) override;

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

      virtual bool shouldDraw(bool isShadowPass) override;

   protected:
      virtual void initializeUbosIfNecessary(osg::RenderInfo& renderInfo);

   protected:
      osg::ref_ptr<osg::Uniform> myDigitTextureUniform;

      //Texture for rendering the debug labels. Contains all 10 digits so that any number can be 
      // shown using the debug labels. The debug labels show the light point type for now.
      osg::ref_ptr<osg::Texture> myDigitTexture;

      DtOsgLightPointManager& myLightPointManager;

      DtGlBuffer* myGpuShaderUbo;
      int myGpuShaderUboBinding;
      DtIndirectLightPointDrawComponentShaderConstants* myShaderConstants;
   };
}