Method PruneParameters

trinity/Shader/Tr2Effect.cpp:1077–1187

--------------------------------------------------------------- PruneParameters Removes any parameters from the object that do not exist in the effect file ---------------------------------------------------------------

// effect file
// ---------------------------------------------------------------
bool Tr2Effect::PruneParameters()
{
	CCP_STATS_ZONE( __FUNCTION__ );

	if( !m_shader )
	{
		CCP_LOGERR( "Tr2Effect::PruneParameters: no effect resource loaded." );
		return false;
	}

	// Prune Effects Parameters
	int y = 0;
	while( y < m_parameters.GetSize() )
	{
		std::string pName = m_parameters[y]->GetParameterName();
		bool removeParameter = !GetBool( m_shader, pName.c_str(), "SasUiVisible" );
		const Tr2EffectConstant* constant = m_shader->GetConstant( pName.c_str() );
		if( constant == nullptr && !removeParameter )
		{
			removeParameter = true;
			auto& desc = m_shader->GetEffectDescription();
			for( auto technique = desc.techniques.begin(); technique != desc.techniques.end(); ++technique )
			{
				for( auto pass = technique->passes.begin(); pass != technique->passes.end(); ++pass )
				{
					for( unsigned i = 0; i < Tr2RenderContextEnum::SHADER_TYPE_COUNT; ++i )
					{
						for( auto sampler = pass->stageInputs[i].resources.begin(); sampler != pass->stageInputs[i].resources.end(); ++sampler )
						{
							if( strcmp( sampler->second.name, pName.c_str() ) == 0 )
							{
								removeParameter = false;
								break;
							}
						}
					}
				}
			}
		}
		if( removeParameter )
		{
			m_parameters.Remove( y );
		}
		else
		{
			++y;
		}
	}

	// Prune const parameters
	size_t it = 0;
	while( it < m_constParameters.size() )
	{
		const char* pName = m_constParameters[it].name.c_str();
		bool removeParameter = !GetBool( m_shader, pName, "SasUiVisible" );
		const Tr2EffectConstant* constant = m_shader->GetConstant( pName );
		if( constant == nullptr && !removeParameter )
		{