OgreShaderCGProgramWriter.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) 2000-2012 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
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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*/
#ifndef __ShaderProgramWriterCG_H__
#define __ShaderProgramWriterCG_H__

#include "OgreShaderProgramWriterManager.h"

namespace Ogre {
namespace RTShader {

class _OgreRTSSExport CGProgramWriter : public ProgramWriter
{

// Interface.
public:

    CGProgramWriter ();

    virtual ~CGProgramWriter ();

    virtual void            writeSourceCode         (std::ostream& os, Program* program);

    virtual const String&  getTargetLanguage            () const { return TargetLanguage; }

    static String TargetLanguage;

// Protected methods.
protected:

    void        initializeStringMaps        ();

    void        writeProgramDependencies    (std::ostream& os, Program* program);
    
    void        writeUniformParameter       (std::ostream& os, UniformParameterPtr parameter);

    void        writeFunctionParameter      (std::ostream& os, ParameterPtr parameter);

    void        writeLocalParameter         (std::ostream& os, ParameterPtr parameter);

    void        writeFunctionDeclaration    (std::ostream& os, Function* function, ParameterPtr & colorParameter);

    void        writeAtomInstance           (std::ostream& os, FunctionAtom* atom);


protected:
    typedef     map<GpuConstantType, const char*>::type     GpuConstTypeToStringMap;
    typedef     map<Parameter::Semantic, const char*>::type ParamSemanticToStringMap;

// Attributes.
protected:
    GpuConstTypeToStringMap     mGpuConstTypeMap;       // Map between GPU constant type to string value.
    ParamSemanticToStringMap    mParamSemanticMap;      // Map between parameter semantic to string value.
};

class _OgreRTSSExport ShaderProgramWriterCGFactory : public ProgramWriterFactory
{
public:
    ShaderProgramWriterCGFactory()
    {
        mLanguage = "cg";
    }
    virtual ~ShaderProgramWriterCGFactory() {}

    virtual const String& getTargetLanguage(void) const
    {
        return mLanguage;
    }

    virtual ProgramWriter* create(void)
    {
        return OGRE_NEW CGProgramWriter();
    }

private:
    String mLanguage;

};

}
}

#endif