OgreGLSLLinkProgramManager.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2013 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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*/
#ifndef __GLSLLinkProgramManager_H__
#define __GLSLLinkProgramManager_H__

#include "OgreGLPrerequisites.h"
#include "OgreSingleton.h"

#include "OgreGLSLExtSupport.h"
#include "OgreGLSLLinkProgram.h"

namespace Ogre {

    namespace GLSL {

    class _OgreGLExport GLSLLinkProgramManager : public Singleton<GLSLLinkProgramManager>
    {

    private:
    
        typedef map<uint64, GLSLLinkProgram*>::type LinkProgramMap;
        typedef LinkProgramMap::iterator LinkProgramIterator;

        LinkProgramMap mLinkPrograms; 

        GLSLGpuProgram* mActiveVertexGpuProgram;
        GLSLGpuProgram* mActiveGeometryGpuProgram;
        GLSLGpuProgram* mActiveFragmentGpuProgram;
        GLSLLinkProgram* mActiveLinkProgram;

        typedef map<String, GLenum>::type StringToEnumMap;
        StringToEnumMap mTypeEnumMap;

        void completeDefInfo(GLenum gltype, GpuConstantDefinition& defToUpdate);
        bool completeParamSource(const String& paramName,
            const GpuConstantDefinitionMap* vertexConstantDefs, 
            const GpuConstantDefinitionMap* geometryConstantDefs,
            const GpuConstantDefinitionMap* fragmentConstantDefs,
            GLUniformReference& refToUpdate);

    public:

        GLSLLinkProgramManager(void);

        ~GLSLLinkProgramManager(void);

        GLSLLinkProgram* getActiveLinkProgram(void);

        void setActiveFragmentShader(GLSLGpuProgram* fragmentGpuProgram);
        void setActiveGeometryShader(GLSLGpuProgram* geometryGpuProgram);
        void setActiveVertexShader(GLSLGpuProgram* vertexGpuProgram);

        void extractUniforms(GLhandleARB programObject, 
            const GpuConstantDefinitionMap* vertexConstantDefs, 
            const GpuConstantDefinitionMap* geometryConstantDefs,
            const GpuConstantDefinitionMap* fragmentConstantDefs,
            GLUniformReferenceList& list);
        void extractConstantDefs(const String& src, GpuNamedConstants& constantDefs, 
            const String& filename);

        static GLSLLinkProgramManager& getSingleton(void);
        static GLSLLinkProgramManager* getSingletonPtr(void);

    };

    }
}

#endif // __GLSLLinkProgramManager_H__