DtOsgShaderCache.h

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/******************************************************************************
** Copyright (c) 2013 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <map>
#include <set>
#include <string>

#include <osg/ref_ptr>
#include <osg/Shader>
#include <osg/Program>

typedef std::set<std::string> SetShaderDefines;
typedef std::map<std::string, std::string> MapShaderDefines;

typedef std::map<std::string, osg::ref_ptr<osg::Shader> > MapNamesToShaders;
typedef std::set<osg::ref_ptr<osg::Program> > SetPrograms;

namespace makVrv
{
   class DT_DLL_VRVOSG DtOsgShaderCache
   {
   public:
      DtOsgShaderCache();
      virtual ~DtOsgShaderCache();

      osg::ref_ptr<osg::Shader> getOrCreateShader(
         const std::string& strFileName
         , const SetShaderDefines& setShaderDefines
         , const MapShaderDefines& mapShaderDefines
         , osg::Shader::Type type);

      osg::ref_ptr<osg::Shader> getOrCreateShader(
         const std::string& strFileName1
         , const std::string& strFileName2
         , const SetShaderDefines& setShaderDefines
         , const MapShaderDefines& mapShaderDefines
         , osg::Shader::Type type);

      osg::ref_ptr<osg::Program> getOrCreateProgram(
         osg::ref_ptr<osg::Shader> vertexShader
         , osg::ref_ptr<osg::Shader> pixelShader);
   private:
      MapNamesToShaders myShaders;
      SetPrograms myPrograms;
   };
}