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

# glBufferSubData(_:_:_:_:)

## Declaration

```swift
func glBufferSubData(_ target: GLenum, _ offset: GLintptr, _ size: GLsizeiptr, _ data: UnsafeRawPointer!)
```