---
title: MPSNNGramMatrixCallback
framework: metalperformanceshaders
role: symbol
role_heading: Protocol
path: metalperformanceshaders/mpsnngrammatrixcallback
---

# MPSNNGramMatrixCallback

## Declaration

```swift
protocol MPSNNGramMatrixCallback : NSCopying, NSSecureCoding, NSObjectProtocol
```

## Topics

### Instance Methods

- [alpha(forSourceImage:destinationImage:)](metalperformanceshaders/mpsnngrammatrixcallback/alpha(forsourceimage:destinationimage:).md)

## Relationships

### Inherits From

- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)