DtOpenGLCubeMap.h

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/******************************************************************************
** Copyright (c) 2018 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <osg/Texture>
#include <osg/Image>
#include <osg/Camera>
#include <vrvUtil/DtSignalConnectionManager.h>
#include <vrvOsg/DtTextureUnitInfo.h>

// custom texture class that lets us wrap a non-OSG
// environmental cube map for reflections (it comes from SilverLining.)
namespace makVrv
{
   class DtDe;

   class DtOpenGLCubeMap : public osg::Texture
   {
   public:
      DtOpenGLCubeMap();

      DtOpenGLCubeMap(DtDe& de, osg::Camera* camera);

      DtOpenGLCubeMap(const DtOpenGLCubeMap& copy, const osg::CopyOp& copyOp =
         osg::CopyOp::SHALLOW_COPY);

      META_StateAttribute(osg, DtOpenGLCubeMap, TEXTURE);

      virtual int compare(const osg::StateAttribute& sa) const;

      virtual GLenum getTextureTarget() const ;

      virtual void setImage(unsigned int face, osg::Image *image);

      virtual osg::Image *getImage(unsigned int face);

      virtual const osg::Image *getImage(unsigned int face) const;

      virtual unsigned int getNumImages() const;

      virtual void computeInternalFormat() const;

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

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

      // We stick the environment cube map above the highest "normal"
      // slot to avoid interference with OSG textures
      static int getEnvMapSlot(void){return DtTextureUnitInfo::EnvironmentMapTextureUnit;}

   protected:
      virtual ~DtOpenGLCubeMap();

      osg::Camera * myCamera;
      DtDe *myDe;
   };


}