genesis-3d_engine/Engine/addons/shadercompiler/Compilers/CGTool.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
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****************************************************************************/
#include "stdneb.h"
#if __WIN32__

#include "CGTool.h"

#include "shadercompiler/ShaderElement.h"
#include "shadercompiler/ShaderCompiler.h"
#include "shadercompiler/Utility/ShaderCompilerUtil.h"

#include "exception/exceptions.h"

namespace ShaderProgramCompiler
{
	__ImplementClass(CGTool,'CGTL',Core::RefCounted);
	__ImplementImageSingleton(CGTool);


static void ErrorHandler(CGcontext context, CGerror error, void *data)
{
	n_warning("Cg Error: %s \n", cgGetErrorString(error));
}


CGTool::CGTool()
{
	__ConstructImageSingleton;
}

CGTool::~CGTool()
{
	__DestructImageSingleton;
}

void CGTool::InitCG()
{
	cgSetErrorHandler( ErrorHandler, NULL );

	m_Context = cgCreateContext();
	m_Error   = CG_NO_ERROR;

	ShaderUtil::ReadText("sys:common.wjh", m_sIncludeContent);

	SizeT nMaxBoneBySubmesh = 60;
	Util::String strArraySize;
	strArraySize.Format(" float4x4 gFinalXForms[%d]; \n",nMaxBoneBySubmesh);	
	m_sIncludeContent += strArraySize;
}

void CGTool::CloseCG()
{
	cgDestroyContext(m_Context);
}

void CGTool::Prepare(const ShaderPass* pPass, const GpuProgramCompiler* pCompiler)
{
	const CommonShaderSetting& cs = pPass->GetCommonSetting();

	const Util::Array<GpuProgramCompiler::ShaderMarcroInfo>& macros = pCompiler->GetMacros();

	m_Parameters.Clear();

	for (IndexT i = 0; i < macros.Size(); ++i)
	{
		m_Parameters.Append("-D" + macros[i].name + "=" + macros[i].value);
	}



	const CommonShaderSetting::ShaderType  type  = cs.GetShaderType();
	const CommonShaderSetting::ShaderModel model = cs.GetShaderModel();
	const CommonShaderSetting::GPUSDK      sdk   = cs.GetGpuSDK();

	if (type == CommonShaderSetting::Vertex)
	{
		if (model == CommonShaderSetting::ShaderModel11)
		{
			if (sdk == CommonShaderSetting::GPUSDKD3D9)
			{
				m_Profile = CG_PROFILE_VS_1_1;
			}

		}
		else if (model == CommonShaderSetting::ShaderModel20)
		{
			if (sdk == CommonShaderSetting::GPUSDKD3D9)
			{
				m_Profile = CG_PROFILE_VS_2_0;
			}
		}
		else if (model == CommonShaderSetting::ShaderModel30)
		{
			if (sdk == CommonShaderSetting::GPUSDKD3D9)
			{
				m_Profile = CG_PROFILE_VS_3_0;
			}
		}
	}
	else if (type == CommonShaderSetting::Pixel)
	{
		if (model == CommonShaderSetting::ShaderModel11)
		{
			if (sdk == CommonShaderSetting::GPUSDKD3D9)
			{
				m_Profile = CG_PROFILE_PS_1_1;
			}

		}
		else if (model == CommonShaderSetting::ShaderModel20)
		{
			if (sdk == CommonShaderSetting::GPUSDKD3D9)
			{
				m_Profile = CG_PROFILE_PS_2_0;
			}
		}
		else if (model == CommonShaderSetting::ShaderModel30)
		{
			if (sdk == CommonShaderSetting::GPUSDKD3D9)
			{
				m_Profile = CG_PROFILE_PS_3_0;
			}
		}
	}
}

bool CGTool::Compile(const Util::String& sourceCode, const Util::String& entryName)
{
	SizeT nParams = m_Parameters.Size();

	const char** args = n_new_array(const char*, nParams + 1);

	for ( IndexT i = 0; i < nParams; ++i )
	{
		args[i] = m_Parameters[i].AsCharPtr();
		
	}

	args[nParams] = NULL;

	Util::String shaderStr = m_sIncludeContent + sourceCode;

	m_CGProgram = cgCreateProgram( m_Context, CG_SOURCE, shaderStr.AsCharPtr(), m_Profile, entryName.AsCharPtr(), args );

	n_delete_array(args);

	const char* pLastList = cgGetLastListing(m_Context);

	if (pLastList != NULL)
	{
		n_warning("Compile Shader Warning : %s \n", pLastList);
	}

	m_Error = cgGetError();

	if (m_Error != CG_NO_ERROR)
	{

		SYS_EXCEPT(Exceptions::ShaderException, 
			STRING_FORMAT("Compile Shader Error : %s \n.", pLastList),
			GET_FUNCTION_NAME()
			);

		return false;
	}

	const char* pResult = cgGetProgramString( m_CGProgram, CG_COMPILED_PROGRAM );

	if (pResult == NULL)
	{
		SYS_EXCEPT(Exceptions::ShaderException, 
			STRING_FORMAT("Can not Get Compiled Code\n."),
			GET_FUNCTION_NAME()
			);

		return false;
	}

	m_sAssembly = pResult;

	_TrimCode();

	return true;
}

void CGTool::_TrimCode()
{
	IndexT pos = m_sAssembly.FindStringIndex("//");
	IndexT firstSlash = pos;
	IndexT lastSlash = 0;

	while (pos != InvalidIndex)
	{
		lastSlash = pos;
		pos = m_sAssembly.FindStringIndex("//", pos+1);
	}

	IndexT codePos = m_sAssembly.FindCharIndex('\n', lastSlash);
	m_sAssembly = m_sAssembly.EraseRange(firstSlash, codePos - firstSlash);

	
}

void CGTool::GetRegisterIndex()
{

	CGparameter cgParam = NULL;

	bool bProgram = _HasProgramParameter(cgParam);

	if (bProgram)
	{
		while(cgParam != NULL)
		{
			_IterateParamter(cgParam, m_sBindings);
			cgParam = _ResurseParameter(cgParam);
		}
	}

	cgParam = NULL;

	bool bGlobal = _HasGlobalParameter(cgParam);

	if (bGlobal)
	{
		while(cgParam != NULL)
		{
			_IterateParamter(cgParam, m_sBindings);
			cgParam = _ResurseParameter(cgParam);
		}
	}


}

void CGTool::_IterateParamter(const CGparameter cgParam, Util::String& bindings)
{

	CGenum paramDirection = cgGetParameterDirection(cgParam);

	if (paramDirection != CG_IN && paramDirection != CG_INOUT || !cgIsParameterReferenced(cgParam))
	{
		return;
	}


	Util::String paramName = cgGetParameterName(cgParam);

	IndexT leftBracket = paramName.FindCharIndex('[', 0);
	
	if (leftBracket	!= InvalidIndex)
	{
		paramName = paramName.EraseRange(leftBracket, 1);
	}

	IndexT rightBracket = paramName.FindCharIndex(']', 0);
	if (rightBracket != InvalidIndex)
	{
		paramName = paramName.EraseRange(rightBracket, 1);
	}
	
	CGresource cgResource     = cgGetParameterResource(cgParam);
	CGresource cgBaseResource = cgGetParameterBaseResource(cgParam);
	CGparameterclass cgClass  = cgGetParameterClass(cgParam);

	uint nRegister            = cgGetParameterResourceIndex(cgParam);


	if ( cgClass == CG_PARAMETERCLASS_SAMPLER && cgBaseResource == CG_TEXUNIT0 )
	{
		CGtype type = cgGetParameterBaseType( cgParam );
		bindings   += "BindTexture " + Util::String::FromInt(nRegister) + " [" + paramName + "] ";

		if (type == CG_SAMPLER1D)
		{
			bindings += "1D\n";
		}
		else if (type == CG_SAMPLER2D)
		{
			 bindings += "2D\n";
		}
		else if (type == CG_SAMPLER3D)
		{
			bindings += "3D\n";
		}
		else if (type == CG_SAMPLERCUBE)
		{
			bindings += "CUBE\n";
		}

	}

	if (cgResource == CG_C)
	{
		if (cgClass == CG_PARAMETERCLASS_SCALAR)
		{
			bindings += "SetParam " + Util::String::FromInt(nRegister) + " [" + paramName + "]" + " Float\n";
		}
		else if (cgClass == CG_PARAMETERCLASS_VECTOR)
		{
			bindings += "SetParam " + Util::String::FromInt(nRegister) + " [" + paramName + "]" + " Vector\n";
		}
		else if (cgClass == CG_PARAMETERCLASS_MATRIX)
		{
			bindings += "SetParam " + Util::String::FromInt(nRegister) + " [" + paramName + "]" + " Matrix\n";
		}
	}

}

}

#endif