# Deprecated symbols Review unsupported symbols and their replacements. ## Topics ### Deprecated methods [`func useResource(any MTLResource, usage: MTLResourceUsage)`](/documentation/Metal/MTLRenderCommandEncoder/useResource(_:usage:)) Ensures the shaders in the render pass’s subsequent draw commands have access to a resource. [`func use(any MTLResource, usage: MTLResourceUsage, stages: MTLRenderStages)`](/documentation/Metal/MTLRenderCommandEncoder/use(_:usage:stages:)) Ensures the shaders in the render pass’s subsequent draw commands have access to a resource. [`func useResources([any MTLResource], usage: MTLResourceUsage)`](/documentation/Metal/MTLRenderCommandEncoder/useResources(_:usage:)) Ensures the shaders in the render pass’s subsequent draw commands have access to multiple resources. [`func use(UnsafePointer, count: Int, usage: MTLResourceUsage, stages: MTLRenderStages)`](/documentation/Metal/MTLRenderCommandEncoder/use(_:count:usage:stages:)) Ensures the shaders in the render pass’s subsequent draw commands have access to multiple resources. [`- (void) useResources:(id const[]) resources count:(NSUInteger) count usage:(MTLResourceUsage) usage;`](/documentation/Metal/MTLRenderCommandEncoder/useResources:count:usage:) Ensures the shaders in the render pass’s subsequent draw commands have access to multiple resources. [`func useHeap(any MTLHeap)`](/documentation/Metal/MTLRenderCommandEncoder/useHeap(_:)) Ensures the shaders in the render pass’s subsequent draw commands have access to the resources you allocate from a heap. [`func use(any MTLHeap, stages: MTLRenderStages)`](/documentation/Metal/MTLRenderCommandEncoder/use(_:stages:)) Ensures the shaders in the render pass’s subsequent draw commands have access to the resources you allocate from a heap. [`func useHeaps([any MTLHeap])`](/documentation/Metal/MTLRenderCommandEncoder/useHeaps(_:)) Ensures the shaders in the render pass’s subsequent draw commands have access to the resources you allocate from multiple heaps. [`func use(UnsafePointer, count: Int, stages: MTLRenderStages)`](/documentation/Metal/MTLRenderCommandEncoder/use(_:count:stages:)) Ensures the shaders in the render pass’s subsequent draw commands have access to the resources you allocate from multiple heaps. [`- (void) useHeaps:(id const[]) heaps count:(NSUInteger) count;`](/documentation/Metal/MTLRenderCommandEncoder/useHeaps:count:) Ensures the shaders in the render pass’s subsequent draw commands have access to the resources you allocate from multiple heaps. [`func textureBarrier()`](/documentation/Metal/MTLRenderCommandEncoder/textureBarrier()) Adds a barrier, which forces any texture read operations to wait until write operations to the same texture finish. --- 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)