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

# glBlendFunc(_:_:)

## Declaration

```swift
func glBlendFunc(_ sfactor: GLenum, _ dfactor: GLenum)
```