DtTileSpaceLightGrid.h

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/******************************************************************************
** Copyright (c) 2023 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/

#pragma once

#include <vrvGraphicsUtils/vrvGraphicsUtils.h>
#include <vrvGraphicsUtils/DtLightScreenSpaceData.h>

#include <vrvMath/DtMatrix4.h>

#pragma warning( push )
#pragma warning( disable : 4251 )

#include <vrvGraphicsUtils/DtForwardDeclare.h>
#include <vrvGraphicsUtils/DtLight.h>

#include <vrvMath/DtCameraFwdDeclare.h>
#include <vrvMath/DtVector2.h>
#include <vrvMath/DtScreenRect.h>
#include <vrvMath/DtIntSize.h>

namespace makVrv
{
#define CPU_SIDE_COMPILATION 1
#include <../data/shaders/lights/DtLightIndexData.h>
#undef CPU_SIDE_COMPILATION

   struct DtLightScreenSpacePerViewData;

   class DT_DLL_VRVGRAPHICSUTILS DtTileSpaceLightGrid
   {
   public:
      DtTileSpaceLightGrid();

      virtual ~DtTileSpaceLightGrid();

   private:
      DtTileSpaceLightGrid(const DtTileSpaceLightGrid& other) = delete;
      DtTileSpaceLightGrid &operator=(const DtTileSpaceLightGrid& other) = delete;

   public:
      virtual void setTileSize(const Vector2_uint32& tileSize);

      virtual const Vector2_uint32& tileSize(void) const;

      virtual const Vector2_uint32 tileSizeLog2(void) const;


      virtual const Vector2_uint32& gridMaxDims(void) const;

      virtual uint32 gridMaxDimsFlattened(void) const;

      virtual void update(const std::vector<const DtLight*>& frustumVisibleLights
         , const std::vector<DtLight*>& packedLights
         , const Vector2_uint32& viewportSize);

      virtual const DtLightIndexData* tileLightIndexListsPtr() const;

      virtual uint32 totalTileLightIndexListLength() const;

   protected:
      virtual void updateToAccountForScreenRes(const Vector2_uint32& viewportSize);

   protected:
      static const Vector2_uint32 theInitialMaxScreenResolution;

   protected:

      Vector2_uint32 myTileSize;

      Vector2_uint32 myCurrentMaxScreenResolution;
      
      Vector2_uint32 myGridMaxDims;

      std::vector<DtLightIndexData> myTileLightIndexLists;
   };

} //namespace makVrv

#pragma warning(pop)