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# MTLTextureSwizzleChannels

A pattern that modifies the data read or sampled from a texture by rearranging or duplicating the elements of a vector.

```
struct MTLTextureSwizzleChannels
```

## Overview

Use this structure to specify a custom swizzle pattern when creating a new texture or texture view.

## Topics

### Creating a swizzle pattern

[`init()`](/documentation/Metal/MTLTextureSwizzleChannels/init())

Creates a default swizzle pattern.

[`init(red:green:blue:alpha:)`](/documentation/Metal/MTLTextureSwizzleChannels/init(red:green:blue:alpha:))

Creates a swizzle pattern.

### Specifying swizzle values

[`red`](/documentation/Metal/MTLTextureSwizzleChannels/red)

The data copied to the first output channel.

[`green`](/documentation/Metal/MTLTextureSwizzleChannels/green)

The data copied to the second output channel.

[`blue`](/documentation/Metal/MTLTextureSwizzleChannels/blue)

The data copied to the third output channel.

[`alpha`](/documentation/Metal/MTLTextureSwizzleChannels/alpha)

The data copied to the fourth output channel.


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