# PostProcessingPass.ComputeRequiredMarginsDelegate

> The optional callback to compute the required read and write margins for the effect.

## Definition

* **Type:** Delegate
* **Namespace:** [UnityEngine.UIElements](/engine/6000.3/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public delegate PostProcessingMargins PostProcessingPass.ComputeRequiredMarginsDelegate(FilterFunction func)
```