---
title: "glStencilOp(_:_:_:)"
framework: OpenGL ES
role: symbol
role_heading: Function
platforms: [iOS 3.0+, iPadOS 3.0+, Mac Catalyst 3.0+, tvOS 9.0+]
path: "opengles/glstencilop(_:_:_:)"
---

# glStencilOp(_:_:_:)

## Declaration

```swift
func glStencilOp(_ fail: GLenum, _ zfail: GLenum, _ zpass: GLenum)
```