DtIndirectBlendFunction.h

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


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <ostream>

namespace makVrv
{
   // The blend factors enum
   enum DtIndirectBlendFactor
   {
        FACTOR_ONE
      , FACTOR_ZERO
      , FACTOR_SOURCE_ALPHA
      , FACTOR_ONE_MINUS_SOURCE_ALPHA
   };

   class DT_DLL_VRVOSG DtIndirectBlendFunction
   {
   public:
      DtIndirectBlendFunction();

      DtIndirectBlendFunction(DtIndirectBlendFactor srcRgb, DtIndirectBlendFactor dstRgb
         , DtIndirectBlendFactor srcAlpha, DtIndirectBlendFactor dstAlpha);

      DtIndirectBlendFunction(DtIndirectBlendFactor srcFactor, DtIndirectBlendFactor dstFactor);

      DtIndirectBlendFunction(const DtIndirectBlendFunction &other);

      DtIndirectBlendFunction &operator=(const DtIndirectBlendFunction &other);

      ~DtIndirectBlendFunction();
   public:
      const DtIndirectBlendFactor& srcRgb(void) const;

      const DtIndirectBlendFactor& dstRgb(void) const;

      const DtIndirectBlendFactor& srcAlpha(void) const;

      const DtIndirectBlendFactor& dstAlpha(void) const;

      bool operator==(const DtIndirectBlendFunction& rhs) const;

      bool operator!=(const DtIndirectBlendFunction& rhs) const;

      void apply(void) const;
   protected:
      DtIndirectBlendFactor mySrcRgb;
      DtIndirectBlendFactor myDstRgb;

      DtIndirectBlendFactor mySrcAlpha;
      DtIndirectBlendFactor myDstAlpha;
   };

   std::ostream& operator <<(std::ostream& o, const DtIndirectBlendFunction& blendFunction);
}