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# heapTextureSizeAndAlign(descriptor:)

Returns the size and alignment, in bytes, of a texture if you create it from a heap.

```
func heapTextureSizeAndAlign(descriptor desc: MTLTextureDescriptor) -> MTLSizeAndAlign
```

## Parameters

`desc`

An [`MTLTextureDescriptor`](/documentation/Metal/MTLTextureDescriptor) instance.

## Return Value

An [`MTLSizeAndAlign`](/documentation/Metal/MTLSizeAndAlign) instance.

## Discussion

Use this method to help estimate an appropriate size for a new heap before you create it.

---

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