C++ ParameterPtr::getContent方法代码示例

//-----------------------------------------------------------------------
void GLSLProgramWriter::writeOutParameters(std::ostream& os, Function* function, GpuProgramType gpuType)
{
	const ShaderParameterList& outParams = function->getOutputParameters();

	ShaderParameterConstIterator itParam = outParams.begin();
	ShaderParameterConstIterator itParamEnd = outParams.end();

	for ( ; itParam != itParamEnd; ++itParam)
	{
		ParameterPtr pParam = *itParam;

		if(gpuType == GPT_VERTEX_PROGRAM)
		{
			// GLSL vertex program has to write always gl_Position (but this is also deprecated after version 130)
			if(pParam->getContent() == Parameter::SPC_POSITION_PROJECTIVE_SPACE)
			{
				mInputToGLStatesMap[pParam->getName()] = "gl_Position";
			}
			else
			{
				// After GLSL 1.20 varying is deprecated
				if(mGLSLVersion <= 120)
				{
					os << "varying\t";
				}
				else
				{
					os << "out\t";
				}

				os << mGpuConstTypeMap[pParam->getType()];
				os << "\t";
				os << pParam->getName();
				if (pParam->isArray() == true)
				{
					os << "[" << pParam->getSize() << "]";	
				}
				os << ";" << std::endl;	
			}
		}
		else if(gpuType == GPT_FRAGMENT_PROGRAM &&
				pParam->getSemantic() == Parameter::SPS_COLOR)
		{					
			// GLSL fragment program has to write always gl_FragColor (but this is also deprecated after version 130)
            // Always add gl_FragColor as an output.  The name is for compatibility.
            if(mGLSLVersion <= 130)
            {
                mInputToGLStatesMap[pParam->getName()] = "gl_FragColor";
            }
            else
            {
                os << "out vec4 fragColour;" << std::endl;
                mInputToGLStatesMap[pParam->getName()] = "fragColour";
            }
        }
    }
}

//-----------------------------------------------------------------------------
ParameterPtr Function::resolveInputParameter(Parameter::Semantic semantic,
										int index,
										const Parameter::Content content,
										GpuConstantType type)
{
	ParameterPtr param;

	// Check if desired parameter already defined.
	param = getParameterByContent(mInputParameters, content, type);
	if (param.get() != NULL)
		return param;

	// Case we have to create new parameter.
	if (index == -1)
	{
		index = 0;

		// Find the next available index of the target semantic.
		ShaderParameterIterator it;

		for (it = mInputParameters.begin(); it != mInputParameters.end(); ++it)
		{
			if ((*it)->getSemantic() == semantic)
			{
				index++;
			}
		}
	}
	else
	{
		// Check if desired parameter already defined.
		param = getParameterBySemantic(mInputParameters, semantic, index);
		if (param.get() != NULL && param->getContent() == content)
		{
			if (param->getType() == type)
			{
				return param;
			}
			else 
			{
				OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, 
					"Can not resolve parameter - semantic: " + StringConverter::toString(semantic) + " - index: " + StringConverter::toString(index) + " due to type mismatch. Function <" + getName() + ">", 			
					"Function::resolveInputParameter" );
			}
		}
	}

	

	// No parameter found -> create new one.
	switch (semantic)
	{
	case Parameter::SPS_POSITION:	
		assert(type == GCT_FLOAT4);
		param = ParameterFactory::createInPosition(index);
		break;
			
	case Parameter::SPS_BLEND_WEIGHTS:			
		assert(type == GCT_FLOAT4);
		param = ParameterFactory::createInWeights(index);
		break;
			
	case Parameter::SPS_BLEND_INDICES:
		assert(type == GCT_FLOAT4);
		param = ParameterFactory::createInIndices(index);
		break;
			
	case Parameter::SPS_NORMAL:
		assert(type == GCT_FLOAT3);
		param = ParameterFactory::createInNormal(index);
		break;
			
	case Parameter::SPS_COLOR:
		assert(type == GCT_FLOAT4);
		param = ParameterFactory::createInColor(index);
		break;
						
	case Parameter::SPS_TEXTURE_COORDINATES:		
		param = ParameterFactory::createInTexcoord(type, index, content);				
		break;
			
	case Parameter::SPS_BINORMAL:
		assert(type == GCT_FLOAT3);
		param = ParameterFactory::createInBiNormal(index);
		break;
			
	case Parameter::SPS_TANGENT:
		assert(type == GCT_FLOAT3);
		param = ParameterFactory::createInTangent(index);
		break;
	case Parameter::SPS_UNKNOWN:
        break;
	}

	if (param.get() != NULL)
		addInputParameter(param);

	return param;
}

//-----------------------------------------------------------------------
void GLSLProgramWriter::writeInputParameters(std::ostream& os, Function* function, GpuProgramType gpuType)
{
	const ShaderParameterList& inParams = function->getInputParameters();

	ShaderParameterConstIterator itParam = inParams.begin();
	ShaderParameterConstIterator itParamEnd = inParams.end();

	for ( ; itParam != itParamEnd; ++itParam)
	{		
		ParameterPtr pParam = *itParam;
		Parameter::Content paramContent = pParam->getContent();
		String paramName = pParam->getName();

		if (gpuType == GPT_FRAGMENT_PROGRAM)
		{					
			// push fragment inputs they all could be written (in glsl you can not write
			// input params in the fragment program)
			mFragInputParams.push_back(paramName);

			// In the vertex and fragment program the variable names must match.
			// Unfortunately now the input params are prefixed with an 'i' and output params with 'o'.
			// Thats why we are using a map for name mapping (we rename the params which are used in function atoms).
			paramName.replace(paramName.begin(), paramName.begin() + 1, "o");	
			mInputToGLStatesMap[pParam->getName()] = paramName;

			// After GLSL 1.20 varying is deprecated
			if(mGLSLVersion <= 120)
			{
				os << "varying\t";
			}
			else
			{
				os << "in\t";
			}

			os << mGpuConstTypeMap[pParam->getType()];
			os << "\t";	
			os << paramName;
			os << ";" << std::endl;	
		}
		else if (gpuType == GPT_VERTEX_PROGRAM && 
				 mContentToPerVertexAttributes.find(paramContent) != mContentToPerVertexAttributes.end())
		{
			// Due the fact that glsl does not have register like cg we have to rename the params
			// according there content.
			mInputToGLStatesMap[paramName] = mContentToPerVertexAttributes[paramContent];

			// After GLSL 1.40 attribute is deprecated
            if (mGLSLVersion >= 140)
            {
                os << "in\t";
            }
            else
            {
                os << "attribute\t";
            }

			// all uv texcoords passed by ogre are vec4
			if (paramContent == Parameter::SPC_TEXTURE_COORDINATE0 ||
				paramContent == Parameter::SPC_TEXTURE_COORDINATE1 ||
				paramContent == Parameter::SPC_TEXTURE_COORDINATE2 ||
				paramContent == Parameter::SPC_TEXTURE_COORDINATE3 ||
				paramContent == Parameter::SPC_TEXTURE_COORDINATE4 ||
				paramContent == Parameter::SPC_TEXTURE_COORDINATE5 ||
				paramContent == Parameter::SPC_TEXTURE_COORDINATE6 ||
				paramContent == Parameter::SPC_TEXTURE_COORDINATE7 )
			{
				os << "vec4";
			}
			else
			{
				os << mGpuConstTypeMap[pParam->getType()];
			}
			os << "\t";	
			os << mContentToPerVertexAttributes[paramContent];
			os << ";" << std::endl;	
		}
		else if(paramContent == Parameter::SPC_COLOR_DIFFUSE)
		{
			mInputToGLStatesMap[paramName] = "gl_Color";
		}
		else if(paramContent == Parameter::SPC_COLOR_SPECULAR)
		{
			mInputToGLStatesMap[paramName] = "gl_SecondaryColor";
		}
		else
		{
			os << "uniform \t ";
			os << mGpuConstTypeMap[pParam->getType()];
			os << "\t";	
			os << paramName;
			os << ";" << std::endl;	
		}							
	}
}

//-----------------------------------------------------------------------
void GLSLProgramWriter::writeOutParameters(std::ostream& os, Function* function, GpuProgramType gpuType)
{
    const ShaderParameterList& outParams = function->getOutputParameters();

    ShaderParameterConstIterator itParam = outParams.begin();
    ShaderParameterConstIterator itParamEnd = outParams.end();

    for ( ; itParam != itParamEnd; ++itParam)
    {
        ParameterPtr pParam = *itParam;

        if(gpuType == GPT_VERTEX_PROGRAM)
        {
            // GLSL vertex program has to write always gl_Position (but this is also deprecated after version 130)
            if(pParam->getContent() == Parameter::SPC_POSITION_PROJECTIVE_SPACE)
            {
                mInputToGLStatesMap[pParam->getName()] = "gl_Position";
            }
            else
            {
                // After GLSL 1.20 varying is deprecated
                if(mGLSLVersion <= 120)
                {
                    os << "varying\t";
                }
                else
                {
                    os << "out\t";
                }

                os << mGpuConstTypeMap[pParam->getType()];
                os << "\t";
                os << pParam->getName();
                if (pParam->isArray() == true)
                {
                    os << "[" << pParam->getSize() << "]";  
                }
                os << ";" << std::endl; 
            }
        }
        else if(gpuType == GPT_FRAGMENT_PROGRAM &&
                pParam->getSemantic() == Parameter::SPS_COLOR)
        {                   
            // GLSL fragment program has to write always gl_FragColor (but this is also deprecated after version 130)
            // Always add gl_FragColor as an output.  The name is for compatibility.
            if(mGLSLVersion <= 130)
            {
                mInputToGLStatesMap[pParam->getName()] = "gl_FragColor";
            }
            else
            {
                os << "out vec4 fragColour;" << std::endl;
                mInputToGLStatesMap[pParam->getName()] = "fragColour";
            }
        }
    }
    
    if(gpuType == GPT_VERTEX_PROGRAM)
    {
        // Special case where gl_Position needs to be redeclared
        if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS) &&
           mGLSLVersion >= 150)
        {
            os << "out gl_PerVertex\n{\nvec4 gl_Position;\nfloat gl_PointSize;\nfloat gl_ClipDistance[];\n};\n" << std::endl;
        }
    }
}