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# presentRenderbuffer(_:)

Displays a renderbuffer’s contents on screen.

```
func presentRenderbuffer(_ target: Int) -> Bool
```

## Parameters

`target`

The OpenGL ES binding point for a currently bound renderbuffer. The value of this parameter must be `GL_RENDERBUFFER` (or `GL_RENDERBUFFER_OES` in an OpenGL ES 1.1 context).

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if successful; otherwise, <doc://com.apple.documentation/documentation/Swift/false>.

## Discussion

The renderbuffer to be displayed must have been allocated storage using the [`renderbufferStorage(_:from:)`](/documentation/OpenGLES/EAGLContext/renderbufferStorage(_:from:)) method. The exact semantics for how and when the renderbuffer contents are displayed is controlled by the drawable object.

> Important:
> The contents of the renderbuffer may be altered after the renderbuffer is presented to the screen. After presenting the renderbuffer, your application must  *completely* redraw the contents of the renderbuffer before presenting it again. To preserve the contents of the renderbuffer you may set the ``doc://com.apple.opengles/documentation/OpenGLES/kEAGLDrawablePropertyRetainedBacking`` key of the `drawableProperties` dictionary to <doc://com.apple.documentation/documentation/Swift/true>. Setting the key to <doc://com.apple.documentation/documentation/Swift/true> may result in reduced graphics performance and increased memory usage. Therefore, choose this setting only when you need the renderbuffer’s contents to remain unchanged.

## See Also

[`func renderbufferStorage(Int, from: (any EAGLDrawable)?) -> Bool`](/documentation/OpenGLES/EAGLContext/renderbufferStorage(_:from:))

Binds a drawable object’s storage to an OpenGL ES renderbuffer object.


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