---
title: MPSCNNPoolingGradient
framework: metalperformanceshaders
role: symbol
role_heading: Class
path: metalperformanceshaders/mpscnnpoolinggradient
---

# MPSCNNPoolingGradient

A gradient pooling kernel.

## Declaration

```swift
class MPSCNNPoolingGradient
```

## Topics

### Initializers

- [init(coder:device:)](metalperformanceshaders/mpscnnpoolinggradient/init(coder:device:).md)
- [init(device:kernelWidth:kernelHeight:)](metalperformanceshaders/mpscnnpoolinggradient/init(device:kernelwidth:kernelheight:).md)
- [init(device:kernelWidth:kernelHeight:strideInPixelsX:strideInPixelsY:)](metalperformanceshaders/mpscnnpoolinggradient/init(device:kernelwidth:kernelheight:strideinpixelsx:strideinpixelsy:).md)

### Instance Properties

- [sourceSize](metalperformanceshaders/mpscnnpoolinggradient/sourcesize.md)

## Relationships

### Inherits From

- [MPSCNNGradientKernel](metalperformanceshaders/mpscnngradientkernel.md)

### Inherited By

- [MPSCNNDilatedPoolingMaxGradient](metalperformanceshaders/mpscnndilatedpoolingmaxgradient.md)
- [MPSCNNPoolingAverageGradient](metalperformanceshaders/mpscnnpoolingaveragegradient.md)
- [MPSCNNPoolingL2NormGradient](metalperformanceshaders/mpscnnpoolingl2normgradient.md)
- [MPSCNNPoolingMaxGradient](metalperformanceshaders/mpscnnpoolingmaxgradient.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)

## See Also

### Pooling Layers

- [MPSCNNPoolingAverage](metalperformanceshaders/mpscnnpoolingaverage.md)
- [MPSCNNPoolingAverageGradient](metalperformanceshaders/mpscnnpoolingaveragegradient.md)
- [MPSCNNPoolingL2Norm](metalperformanceshaders/mpscnnpoolingl2norm.md)
- [MPSCNNPoolingMax](metalperformanceshaders/mpscnnpoolingmax.md)
- [MPSCNNDilatedPoolingMax](metalperformanceshaders/mpscnndilatedpoolingmax.md)
- [MPSCNNPooling](metalperformanceshaders/mpscnnpooling.md)
- [MPSCNNDilatedPoolingMaxGradient](metalperformanceshaders/mpscnndilatedpoolingmaxgradient.md)
- [MPSCNNPoolingL2NormGradient](metalperformanceshaders/mpscnnpoolingl2normgradient.md)
- [MPSCNNPoolingMaxGradient](metalperformanceshaders/mpscnnpoolingmaxgradient.md)