DtPerViewUniformCallback.h

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/******************************************************************************
** Copyright (c) 2014 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <osg/Drawable>

namespace makVrv
{
   class DtPerViewUniformCallback : public osg::Drawable::DrawCallback
   {
   public:
      DtPerViewUniformCallback();

      DtPerViewUniformCallback(const DtPerViewUniformCallback&,const osg::CopyOp&);

      META_Object(makVrv, DtPerViewUniformCallback);

      virtual ~DtPerViewUniformCallback();

      virtual void drawImplementation(osg::RenderInfo& renderInfo,const osg::Drawable* drawable) const;

      void setValue(const osg::View* v, int val);

      float getValue(const osg::View* v) const;

   protected:

      GLuint findLocation(const osg::Program::PerContextProgram* program);

   protected:
      typedef std::pair<const osg::Program::PerContextProgram*, GLuint> ProgramKey;
      typedef std::map<ProgramKey, GLuint> ProgramToUniformLoc;
      ProgramToUniformLoc myProgramToUniformLoc;

      typedef std::map<const osg::View*, float> ViewToValue;
      ViewToValue myViewToValue;
   };
}