---
title: MTLStencilOperation.decrementClamp
framework: metal
role: symbol
role_heading: Case
path: metal/mtlstenciloperation/decrementclamp
---

# MTLStencilOperation.decrementClamp

A stencil operation that decreases a nonzero stencil value by one.

## Declaration

```swift
case decrementClamp
```

## Discussion

Discussion The operation doesn’t modify a stencil value if it’s currently equal to 0.

## See Also

### Stencil operations

- [MTLStencilOperation.keep](metal/mtlstenciloperation/keep.md)
- [MTLStencilOperation.zero](metal/mtlstenciloperation/zero.md)
- [MTLStencilOperation.replace](metal/mtlstenciloperation/replace.md)
- [MTLStencilOperation.incrementClamp](metal/mtlstenciloperation/incrementclamp.md)
- [MTLStencilOperation.invert](metal/mtlstenciloperation/invert.md)
- [MTLStencilOperation.incrementWrap](metal/mtlstenciloperation/incrementwrap.md)
- [MTLStencilOperation.decrementWrap](metal/mtlstenciloperation/decrementwrap.md)