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# kCVPixelFormatBlackBlock

The bit pattern for a block of black pixels (type `CFData`. If this key is absent, black is assumed to be all zeros. If present, this should be `bitsPerPixel` bits long; if `bitsPerPixel` is less than a byte, repeat the bit pattern for the full byte.

```
let kCVPixelFormatBlackBlock: CFString
```

---

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