DtOsgTextureApplyAttribute.h

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


#pragma once

#include <map>
#include <osg/StateAttribute>

namespace osg
{
   class State;
}

namespace makVrv
{
   class DtGlSimpleTexture;

   class TextureApplyAttribute : public osg::StateAttribute
   {
   public:
      TextureApplyAttribute();

      virtual ~TextureApplyAttribute();

      TextureApplyAttribute(const TextureApplyAttribute& copy, const osg::CopyOp& copyOp =
         osg::CopyOp::SHALLOW_COPY);
   private:
      TextureApplyAttribute& operator=(const TextureApplyAttribute&);
   public:

      virtual void addTexture(size_t index, DtGlSimpleTexture* texture);

      virtual DtGlSimpleTexture* texture(size_t index);

      virtual void removeTexture(size_t index, DtGlSimpleTexture* texture);

      virtual void apply(osg::State& state) const;

      virtual int compare(const StateAttribute& sa) const;

      virtual void releaseGLObjects(osg::State* state/* =0 */) const;

      META_StateAttribute(osg, TextureApplyAttribute, osg::StateAttribute::Type(TRANSFORMFEEDBACKBUFFERBINDING+1))
   protected:
      typedef std::map<size_t, DtGlSimpleTexture*> MapTexUnitToTextures;
      MapTexUnitToTextures myMapTexUnitToTextures;
   };
}