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# makeBlitCommandEncoder(descriptor:)

Creates a block information transfer (blit) encoder from a descriptor.

```
func makeBlitCommandEncoder(descriptor blitPassDescriptor: MTLBlitPassDescriptor) -> (any MTLBlitCommandEncoder)?
```

## Parameters

`blitPassDescriptor`

An [`MTLBlitPassDescriptor`](/documentation/Metal/MTLBlitPassDescriptor) instance that configures the [`MTLBlitCommandEncoder`](/documentation/Metal/MTLBlitCommandEncoder) the method returns.

## Discussion

Use an [`MTLBlitCommandEncoder`](/documentation/Metal/MTLBlitCommandEncoder) instance’s methods to create a block information transfer (blit) pass that quickly copies memory between a GPU device’s resources.

---

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