Function attributeToShaderState

src/IECoreGL/ToGLStateConverter.cpp:106–144

}

StateComponentPtr attributeToShaderState( const IECore::Object *attribute )
{
	const IECoreScene::Shader *shader = runTimeCast<const IECoreScene::Shader>( attribute );
	if( !shader )
	{
		if( const IECoreScene::ShaderNetwork *n = runTimeCast<const IECoreScene::ShaderNetwork>( attribute ) )
		{
			shader = n->outputShader();
		}
	}
	if( !shader )
	{
		throw IECore::Exception( "Expected a Shader" );
	}

	const StringData *vertexSourceData = shader->parametersData()->member<StringData>( "gl:vertexSource" );
	const StringData *geometrySourceData = shader->parametersData()->member<StringData>( "gl:geometrySource" );
	const StringData *fragmentSourceData = shader->parametersData()->member<StringData>( "gl:fragmentSource" );

	std::string vertexSource = vertexSourceData ? vertexSourceData->readable() : "";
	std::string geometrySource = geometrySourceData ? geometrySourceData->readable() : "";
	std::string fragmentSource = fragmentSourceData ? fragmentSourceData->readable() : "";

	if( vertexSource == "" && geometrySource == "" && fragmentSource == "" )
	{
		ShaderLoader::defaultShaderLoader()->loadSource( shader->getName(), vertexSource, geometrySource, fragmentSource );
	}

	CompoundObjectPtr parametersData = new CompoundObject;
	for( CompoundDataMap::const_iterator it=shader->parameters().begin(); it!=shader->parameters().end(); it++ )
	{
		if( it->first!="gl:fragmentSource" && it->first!="gl:geometrySource" && it->first!="gl:vertexSource" )
		{
			parametersData->members()[it->first] = it->second;
		}
	}

	return new ShaderStateComponent( ShaderLoader::defaultShaderLoader(), TextureLoader::defaultTextureLoader(), vertexSource, geometrySource, fragmentSource, parametersData );
}

StateComponentPtr attributeToColorState( const IECore::Object *attribute )
{