# MTLRenderPipelineFunctionsDescriptor A collection of functions for updating a render pipeline. ``` class MTLRenderPipelineFunctionsDescriptor ``` ## Overview When you create a render pipeline that takes visible functions as parameters, you need to specify all possible functions that the render pipeline can call. If you already have a pipeline, you can create a new render pipeline with the same configuration but additional callable functions. To create the new pipeline state, configure an [`MTLRenderPipelineFunctionsDescriptor`](/documentation/Metal/MTLRenderPipelineFunctionsDescriptor) instance with the additional callable functions to add, and then call the pipeline state’s [`makeRenderPipelineState(additionalBinaryFunctions:)`](/documentation/Metal/MTLRenderPipelineState/makeRenderPipelineState(additionalBinaryFunctions:)-84te1) method, passing the descriptor. ## Topics ### Configuring the descriptor’s functions [`vertexAdditionalBinaryFunctions`](/documentation/Metal/MTLRenderPipelineFunctionsDescriptor/vertexAdditionalBinaryFunctions) The vertex functions to add to the render pipeline. [`fragmentAdditionalBinaryFunctions`](/documentation/Metal/MTLRenderPipelineFunctionsDescriptor/fragmentAdditionalBinaryFunctions) The fragment functions to add to the render pipeline. [`tileAdditionalBinaryFunctions`](/documentation/Metal/MTLRenderPipelineFunctionsDescriptor/tileAdditionalBinaryFunctions) The tile functions to add to the render pipeline. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)