genesis-3d_engine/Engine/addons/shadercompiler/ShaderCompiler.h

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
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#ifndef SHADERCOMPILER_H_
#define SHADERCOMPILER_H_

#include "util/array.h"
#include "util/keyvaluepair.h"
#include "util/string.h"
#include "util/dictionary.h"
#include "core/refcounted.h"


namespace ShaderProgramCompiler
{
	class ShaderPass;
	class ShaderMarcro;
	class ShadingTemplateSetting;

	class GpuProgramCompiler : public Core::RefCounted
{
	__DeclareAbstractClass(GpuProgramCompiler);

public:

	GpuProgramCompiler();

	virtual ~GpuProgramCompiler();

public:

	virtual void InitCompiler();

	virtual void Close() = 0;

	virtual void Compile(ShaderPass* pPass) = 0;

public:

	struct ShaderMarcroInfo
	{
		ShaderMarcroInfo ()
		{

		}
		ShaderMarcroInfo (const Util::String& n, const Util::String& v) 
			: name(n), value(v) 
		{

		}

		void Clear()
		{
			name.Clear();
			value.Clear();
		}

		bool IsDefault()
		{
			return ( name.IsEmpty() && value.IsEmpty() );
		}

		Util::String name;
		Util::String value;
	};

	typedef Util::Dictionary<uint, Util::Array<IndexT> > Permutation;

	typedef Util::Array<ShaderMarcroInfo> ShaderMarcros;

	typedef Util::Dictionary<uint, ShaderMarcros> ShaderMacroPermutation;

	const Util::Array< ShaderMarcroInfo >& GetMacros() const;

	const Util::String& GetResult() const;

	void SetShaderName(const Util::String& name);

	const Permutation& GetPermutation() const;

	void  CreateAllShaderMacrosPermutation(const Util::Array<Util::String>& marcroName, const GPtr<ShaderMarcro>& pMarcro, bool bTemplate);

	void  CreateBuiltInMarcro(const uint iPass, const Util::Array<Util::String>& customMacros, const ShadingTemplateSetting* pSetting = NULL);

	const Util::String& GetBuiltInMacroName(const IndexT iPass) const;

protected:

	void _BeforeCompile(const ShaderPass* pPass);

	void _AfterCompile(bool bForwardPass);

	void  _CreatePermutation(const Util::Array<Util::String>& marcroName, bool bTemplate);

protected:

	
	ShaderMarcros                                m_Macros;

	Util::String                                 m_sProgramStartString;

	Util::String                                 m_sResultCode;
	
	Util::Dictionary<uint, Util::String>         m_sCompiledCode;
	Util::Dictionary<uint, Util::String>         m_sRegisterBinds;

	Util::String                                 m_sShaderName;

	Permutation                                  m_Permutation;

	ShaderMacroPermutation                       m_SubShaderMarcroPermuation;

	Util::Dictionary<IndexT, Util::String>       m_BuiltInMacro;

};

inline const Util::Array< GpuProgramCompiler::ShaderMarcroInfo >& GpuProgramCompiler::GetMacros() const
{
	return m_Macros;
}

inline const Util::String& GpuProgramCompiler::GetResult() const
{
	return m_sResultCode;
}

inline void GpuProgramCompiler::SetShaderName(const Util::String& name)
{
	m_sShaderName = name;
}

inline const GpuProgramCompiler::Permutation& GpuProgramCompiler::GetPermutation() const
{
	return m_Permutation;
}

inline const Util::String& GpuProgramCompiler::GetBuiltInMacroName(const IndexT iPass) const
{
	return m_BuiltInMacro[iPass];
}

};
#endif//SHADERCOMPILER_H_