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) 2000-2013 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
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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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);

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

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