# burnRedactions

**Kind:** Function

**Source:** [`atloria-monorepo/apps/screenshot-worker/src/app/screenshot/services/crop.service.ts`](https://github.com/sherkety/atloria/blob/main/atloria-monorepo/apps/screenshot-worker/src/app/screenshot/services/crop.service.ts#L72)

Burn opaque BLACK rectangles into an image, destroying the underlying pixels.

Boxes are percent (0-100) of the natural image; each is converted to a clamped
pixel rect and composited as a filled black overlay. Unlike an annotation
overlay (coordinates on a URL fragment), this is DESTRUCTIVE by design — a
redacted region can never be recovered from the stored asset. Degenerate boxes
(sub-pixel or off-canvas) are skipped. No boxes → the original buffer is returned
untouched (no re-encode).

## Signature

```ts
async function burnRedactions(buffer: Buffer, boxes: BoxPct[], imgW: number, imgH: number): Promise<Buffer>
```

## Parameters

| Name | Type |
|---|---|
| `buffer` | `Buffer` |
| `boxes` | `BoxPct[]` |
| `imgW` | `number` |
| `imgH` | `number` |

**Returns:** `Promise<Buffer>`