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# MTLResourceStateCommandEncoder

An encoder that encodes commands that modify resource configurations.

```
protocol MTLResourceStateCommandEncoder : MTLCommandEncoder
```

## Overview

Use a resource state command encoder to manage memory mappings for sparse textures.

Your app does not define classes that implement this protocol. To create an [`MTLResourceStateCommandEncoder`](/documentation/Metal/MTLResourceStateCommandEncoder) instance, call the [`makeResourceStateCommandEncoder()`](/documentation/Metal/MTLCommandBuffer/makeResourceStateCommandEncoder()) method of the [`MTLCommandBuffer`](/documentation/Metal/MTLCommandBuffer) instance into which you want to encode blit commands. Next, call methods on the [`MTLResourceStateCommandEncoder`](/documentation/Metal/MTLResourceStateCommandEncoder) instance to enqueue state updates. Finally, call [`endEncoding()`](/documentation/Metal/MTLCommandEncoder/endEncoding()) to finish the encoding process.

## Topics

### Updating texture memory assignments

[`updateTextureMapping(_:mode:region:mipLevel:slice:)`](/documentation/Metal/MTLResourceStateCommandEncoder/updateTextureMapping(_:mode:region:mipLevel:slice:))

Encodes a command to update the texture mappings for a region in a single texture mipmap.

[`updateTextureMappings(_:mode:regions:mipLevels:slices:numRegions:)`](/documentation/Metal/MTLResourceStateCommandEncoder/updateTextureMappings(_:mode:regions:mipLevels:slices:numRegions:))

Encodes a command to update memory mappings for multiple regions inside a texture.

[`MTLSparseTextureMappingMode`](/documentation/Metal/MTLSparseTextureMappingMode)

Options for sparse texture mapping.

### Updating texture memory assignments indirectly

[`updateTextureMapping(_:mode:indirectBuffer:indirectBufferOffset:)`](/documentation/Metal/MTLResourceStateCommandEncoder/updateTextureMapping(_:mode:indirectBuffer:indirectBufferOffset:))

Encodes a command to update a texture’s memory mappings, specifying the parameters indirectly.

### Performing fence operations

[`update(_:)`](/documentation/Metal/MTLResourceStateCommandEncoder/update(_:))

Encodes a command that instructs the GPU to update a fence, which signals passes waiting on the fence.

[`wait(for:)`](/documentation/Metal/MTLResourceStateCommandEncoder/wait(for:))

Encodes a command that instructs the GPU to pause before starting the resource state commands until another pass updates a fence.


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